« Remorque pour fauteuil roulant électrique » : différence entre les versions

Amelieb (discussion | contributions)
Aucun résumé des modifications
Amelieb (discussion | contributions)
Aucun résumé des modifications
 
(25 versions intermédiaires par le même utilisateur non affichées)
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|Licences=Attribution (CC BY)
|Licences=Attribution (CC BY)
|Description=<translate>Ce tutoriel décrit la fabrication d’une remorque low-tech conçue pour être rattachée à un fauteuil roulant électrique. Pensée pour être fonctionnelle, légère et accessible, cette remorque permet de transporter facilement des objets.
|Description=<translate>Ce tutoriel décrit la fabrication d’une remorque low-tech conçue pour être attachée à un fauteuil roulant électrique. Pensée pour être fonctionnelle, légère et accessible, cette remorque permet de transporter facilement des objets.</translate>
 
lien tchit: https://wiki.lowtechlab.org/w/index.php?title=Remorque_officielle&action=formedit</translate>
|Area=Materials
|Area=Materials
|Type=Prototype
|Type=Prototype
|Difficulty=Medium
|Difficulty=Hard
|Duration=5
|Duration=5
|Duration-type=day(s)
|Duration-type=day(s)
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}}
}}
{{Introduction
{{Introduction
|Introduction=<translate>Ce tutoriel a été réalisé dans le cadre d’un projet étudiant au cours du semestre PISTE (Pour une Ingénierie Sobre Techno et Eco-responsable) porté par l’Ense3 à Grenoble. Le projet se nomme “Handi’capable” et avait pour objectif de construire une remorque low-tech pour une artiste pouvant s’accrocher à son fauteuil roulant électrique lors de ses spectacles.</translate>
|Introduction=<translate>Ce tutoriel a été réalisé dans le cadre d’un projet étudiant au cours du semestre PISTE (Pour une Ingénierie Sobre Techno et Eco-responsable) porté par l’Ense3 à Grenoble. Le projet se nomme “Handi’capable” et avait pour objectif de construire une remorque low-tech pour une artiste pouvant s’accrocher à son fauteuil roulant électrique lors de ses spectacles. Ce tutoriel peut s'adapter à d'autres véhicules, notamment des vélos, en modifiant la pièce d'"ancrage" au vélo.
 
Dans un souci de temps, nous avons décidé d'utiliser des pièces d'acier et des plaques de contreplaquée neuves . Le châssis et la boite nous ont coûté environ 100€ chaqu'un.e. Cependant, il est complètement possible de réaliser la remorque à partir de matériaux de récupération.</translate>
}}
}}
{{Materials
{{Materials
|Material=<translate>Pour le châssis :
|Material=<translate>Pour le châssis :


*Tubes carrés en acier de 20 mm de largeur et 1,5 mm d'épaisseur :  
*Tubes carrés en acier de 20 mm de largeur et 1.5 mm d'épaisseur :  
**2 de 610 mm de longueur (côtés A)
**2 de 610 mm de longueur (bords du cadre)
**3 de 370 mm de longueur (côtés B + tube traversant)
**3 de 370 mm de longueur (bords du cadre + barre centrale)
**1 de XX mm de longueur (attache)
**1 de 400 mm de longueur (attache)
**2 de XX mm de longueur (support pieds)
**2 de 200 mm de longueur (support pieds)
*2 tubes carrés en acier de XX mm de longueur, XX mm de largeur et XX mm d'épaisseur (pieds)
*2 tubes carrés en acier de 15 mm de largeur, 400 mm de longueur, et 1.5 mm d'épaisseur (pieds)
*2 plaquettes d'acier de 30 mm/30 mm d'épaisseur 2 mm (pieds)
*2 morceaux de bois d'épaisseur 20 mm (pieds)


*4 cornières en acier de XX mm de longueur et 20 mm de largeur et 3 mm d'épaisseur
*4 cornières en acier 20 mm de largeur et 3 mm d'épaisseur, 500 mm de longueur
*Fers plats en acier de 20 mm de largeur et 4 mm d'épaisseur :  
*Fers plats en acier de 20 mm de largeur et 4 mm d'épaisseur :  
**8 de 200 mm de longueur (contreventements)
**4 de 100 mm de longueur (contreventements base châssis)
**4 de 100 mm de longueur (coins)
**8 de 200 mm de longueur (contreventements cornières)
*2 équerres : 60/60mm épaisseur 2mm
*2 équerres en acier : 60/60 mm épaisseur 2 mm
*2 roues de 34 cm de diamètre
*2 roues de 340 mm de diamètre
*Vis, écrous, boulons
*2 vis, 2 goupilles
*Des réflecteurs optiques




Pour l'attache (entre le châssis et le fauteuil roulant électrique) :  
Pour l'attache (entre le châssis et le fauteuil roulant électrique) :  


*Tubes carrés de 20 mm de largeur et 1,5 mm d'épaisseur :  
*Tubes carrés en acier de 20 mm de largeur et 1.5 mm d'épaisseur :  
**1 de XX mm de longueur
**2 de 120 mm de longueur (parties horizontales du Z)
**1 de XX mm de longueur
**1 de 170 mm de longueur (partie diagonale du Z)
**1 de XX mm de longueur
*1 rotule issue de barres stabilisatrices de voiture
*1 rotule d'assistance directionnelle de voiture (possibilité de récupérer en garage
*1 vis, 2 écrous, 1 barre en acier (manivelle)
*1 manivelle de vélo (pièce qui relie la pédale et le pédalier)
 
*Écrous, boulons
Pour l'ancrage 1:
 
*1 tube carré en acier de 25 mm de côté, 2 mm d'épaisseur, 110 mm de longueur
*1 plaque d'acier de 115 mm sur 35 mm, d'épaisseur 4 mm
 
Pour l'ancrage 2:
 
*Tubes carrés en acier de 25 mm de côté, 2 mm d'épaisseur, 110 mm de longueur
**1 de 270 mm de longueur (liaison des plaques)
**1 de 90 mm de longueur (barre verticale)
**1 de 160 mm de longueur (liaison avec le Z)
 
*4 plaques d'acier de 150 mm sur 40 mm, d'épaisseur 4mm




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*Goupilles
*Goupilles
*Ficelles
*Ficelles
*Fers plats</translate>
*Plaquettes d'acier</translate>
|Tools=<translate>Nous avons réalisé ce projet dans le fablab de notre école : nous avions donc de nombreux outils à notre disposition. Cependant, certaines étapes peuvent être réalisées avec d'autres outils, cette liste n'est qu'indicative.
|Tools=<translate>Nous avons réalisé ce projet dans le fablab de notre école : nous avions donc de nombreux outils à notre disposition. Cependant, certaines étapes peuvent être réalisées avec d'autres outils, cette liste n'est qu'indicative.


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*Meuleuse/disqueuse
*Meuleuse/disqueuse
*Ponceuse à bande fixe
*Ponceuse à bande fixe
*Scie circulaire portative
*Scie circulaire à bois portative
*Poste à souder à la baguette
*Poste à souder à la baguette
*Perceuse à colonne
*Perceuse à colonne
*Scie à chantourner
*Scie à chantourner
*Scie à ruban
*Scie à ruban
*Poste à soudure (étain)
*Tarauds et tourne-à-gauche
*Serres joints
*Filière à main
*Outils à main divers: pinces, marteau, limes à métaux, pointeau, clefs, etc...
*Équipements de Protection Individuelle (EPI) : blouse, gants, casque, lunettes, masque, tablier en cuir et masque de soudure (pour certaines étapes)</translate>
*Équipements de Protection Individuelle (EPI) : blouse, gants, casque, lunettes, masque, tablier en cuir et masque de soudure (pour certaines étapes)</translate>
|Prerequisites={{Prerequisites}}
|Tuto_Attachments={{Tuto Attachments
|Tuto_Attachments={{Tuto Attachments
|Attachment=Remorque_officielle_Plans_Chassis_mesures.pdf
|Attachment=Remorque_officielle_Chassis.sldprt
}}{{Tuto Attachments
}}{{Tuto Attachments
|Attachment=Remorque_officielle_Coque.sldprt
|Attachment=Remorque_officielle_Boite.sldprt
}}{{Tuto Attachments
}}{{Tuto Attachments
|Attachment=Remorque_officielle_Plan_Chassis_Global.pdf
|Attachment=Remorque_officielle_Plans_chassis.pdf
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|Attachment=Remorque_officielle_Le_chassis.sldprt
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}}
{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Réfléchir au projet</translate>
|Step_Title=<translate>Réfléchir au projet</translate>
|Step_Content=<translate>Avant de se lancer dans la construction de la remorque low-tech, il est important de réfléchir aux usages prévus, aux contraintes techniques et aux matériaux disponibles. Dans ce projet, la remorque doit être légère, stable et facilement attachable à un fauteuil roulant électrique, tout en étant robuste pour transporter le matériel nécessaire aux spectacles.</translate>
|Step_Content=<translate>Avant de se lancer dans la construction d'une remorque, il est important de réfléchir aux usages prévus, aux contraintes techniques et aux matériaux disponibles.
 
Réalisez vos plans, puis lancez-vous dans la fabrication.
 
Pour notre projet, la remorque devait être légère, stable et rapidement attachable à un fauteuil roulant électrique, tout en étant robuste pour transporter le matériel nécessaire aux spectacles.</translate>
}}
}}
{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Châssis</translate>
|Step_Title=<translate>Châssis</translate>
|Step_Content=<translate>Le châssis constitue la base de la remorque et joue un rôle crucial dans la stabilité et la solidité de l’ensemble. Pour notre projet, nous avons choisi un châssis en acier, lourd mais robuste, associé à une coque en bois. Il est constitué d'une base rectangle, montée de cornières pour caler la boîte. Les plans détaillés et les CAO sont disponibles dans les fichiers joints à ce tuto.</translate>
|Step_Content=<translate>Le châssis constitue la base de la remorque et joue un rôle crucial dans la stabilité et la solidité de l’ensemble. Pour notre projet, nous avons choisi un châssis en acier, plus lourd que de l'aluminium et du bois mais robuste, le tout associé à une boite en bois. Il est constitué d'une base rectangle, montée de cornières pour caler la boite. Les plans détaillés et les CAO sont disponibles dans les fichiers joints à ce tuto.</translate>
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}}
{{Tuto Step
{{Tuto Step
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}}


Procédez à la soudure définitive des quatre coins une fois que tout est correctement positionné et pointé.<br />{{Info|Soudez en plusieurs passes courtes pour éviter les déformations dues à un excès de chaleur.}}<br />{{Warning|Il est impératif de bien porter les EPI (masque à soudure, gants isolants et tablier en cuir) lors de la soudure sous risque de blessure grave.}}
Procédez à la soudure définitive des quatre coins une fois que tout est correctement positionné et pointé.<br />{{Info|Soudez en plusieurs passes courtes pour éviter les déformations dues à un excès de chaleur.}}<br />{{Warning|Il est impératif de bien porter les EPI (masque à soudure, gants isolants et tablier en cuir) lors de la soudure sous risque de blessure.}}


Ajout des contreventements : placez les contreventements en diagonale dans le cadre. Ces pièces renforcent la structure et préviennent les déformations sous charge.
Ajout des contreventements : placez les contreventements en diagonale dans le cadre. Ces pièces renforcent la structure et préviennent les déformations sous charge.




Vous pouvez contraindre la structure avec des serres joints pour rattraper des angles, une fois les contreventements soudés, la structure sera très rigide.  
Vous pouvez contraindre la structure avec des serre-joints pour rattraper des angles, une fois les contreventements soudés, la structure sera très rigide.  




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{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Châssis - montants</translate>
|Step_Title=<translate>Châssis - montants</translate>
|Step_Content=<translate>Pour réaliser des montants, nous avons utilisé des cornières dans l'optique que la boîte puisse glisser à l'intérieur. Libre à vous de choisir des montants qui correspondent à votre besoin.
|Step_Content=<translate>Pour réaliser des montants, nous avons utilisé des cornières dans l'optique que la boite puisse glisser à l'intérieur. Libre à vous de choisir des montants qui correspondent à votre besoin.




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Installez des '''contreventements en biais''' pour redresser les cornières.
Ajustez progressivement les cornières pour qu’elles soient droites, en les contraignant, puis en soudant des contreventements entre les cornières et la base du châssis. Pour cela, vous pouvez réaliser le montage en photo ci-contre : un tube solidaire de la table sert de support pour tirer avec un serre-joint la cornière vers la position droite. Quand la position vous convient, pointez le contreventement, puis soudez-le. Il faut donc faire cette manip 8 fois (si vos cornières ne sont vraiment pas droites! Dans ce cas, bon courage ;))
 
 
Ajustez progressivement à l’aide des contreventements jusqu’à obtenir des cornières parfaitement droites.
 
 
Soudez définitivement les contreventements une fois l’alignement corrigé.
<br />{{Info|L’ajout des contreventements est essentiel pour maintenir l’intégrité de la structure et éviter que les cornières ne bougent ou ne se désalignent après cette étape.}}</translate>
<br />{{Info|L’ajout des contreventements est essentiel pour maintenir l’intégrité de la structure et éviter que les cornières ne bougent ou ne se désalignent après cette étape.}}</translate>
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{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Châssis - roues</translate>
|Step_Title=<translate>Châssis - roues</translate>
|Step_Content=<translate>Il est conseillé que le centre de gravité de la remorque soit décalé de l'axe des roues, pour que la remorque penche naturellement vers l'avant.  
|Step_Content=<translate>Il est conseillé que le centre de gravité de la remorque soit décalé de l'axe des roues, pour que la remorque penche naturellement vers l'avant et éviter qu'elle ne bascule.  


{{Warning|Attention, plus vous désaxerez les roues du centre de gravité, plus vous aurez un grand effort à supporter au niveau de l'ancrage au fauteuil (voir l'étape Attache - ancrage).}}
{{Warning|Attention, plus vous désaxerez les roues du centre de gravité, plus vous aurez un grand effort à supporter au niveau de l'ancrage au fauteuil (voir l'étape Attache - ancrage).}}
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*Réalisez des trous dans les équerres au '''diamètre de l’axe des roues + 1 mm''' pour garantir un ajustement facile.
*Réalisez des trous dans les équerres au '''diamètre de l’axe des roues + 1 mm''' pour garantir un ajustement facile.
*Percez les équerres à l'endroit de l'axe voulu des roues.
*Percez les équerres à l'endroit de l'axe voulu des roues.
*Disquez légèrement les équerres pour y former des '''rainures''' permettant d’insérer les axes des roues.
*Disquez légèrement les équerres avec une disqueuse pour y former des '''rainures''' permettant d’insérer les axes des roues.
*Soudez les équerres au châssis (soyez sûr·e que la roue est suffisamment écartée du châssis pour ne pas qu'elle le touche en roulant).
*Soudez les équerres au châssis (soyez sûr·e que la roue est suffisamment écartée du châssis pour ne pas qu'elle le touche en roulant).
*Contreventez les équerres
*Contreventez les équerres.




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{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Attache - fonctionnement global</translate>
|Step_Title=<translate>Attache - fonctionnement global</translate>
|Step_Content=<translate>L'attache est la partie quasiment centrale de ce projet. En effet, il a fallu trouver un système robuste qui permettait à la fois une grande liberté de mouvement, le tout pouvant s'attacher sur un fauteuil roulant électrique.
|Step_Content=<translate>L'attache est une partie importante de ce projet. En effet, il a fallu trouver un système robuste qui permettait à la fois une grande liberté de mouvement, le tout pouvant s'attacher rapidement sur un fauteuil roulant électrique.




L'avantage de cette attache est qu'elle est adaptable à tout type de véhicule dans la mesure où la "technologie" centrale est la rotule (le point crucial) et la fixation sur le châssis. Si vous souhaitez refaire cette attache pour un vélo, il vous suffira alors de changer le bras reliant la rotule à votre vélo.
L'avantage de cette attache est qu'elle est adaptable à tout type de véhicule dans la mesure où les points centraux sont la rotule et la fixation sur le châssis. Si vous souhaitez refaire cette attache pour un vélo, il vous faudra alors changer la pièce d'ancrage sur votre vélo .




Notre attache constitue le système de lien entre le fauteuil et la remorque. Elle se compose de 4 parties:
Notre attache constitue le système de lien entre le fauteuil et la remorque. Elle se compose de 4 parties:


*La rotule : elle permet d'autoriser les rotations libres entre le châssis et le fauteuil. La rotule ne permettant pas un tangage très important, il est important de permettre ce mouvement (sur un autre véhicule comme vélo, c'est une sécurité en cas de chute latérale). Nous avons utilisé une rotule issue de barres stabilisatrices de voiture.
*La rotule : elle permet d'autoriser les rotations libres entre le châssis et le fauteuil. La rotule ne permettant pas un tangage très important, il est important de permettre ce mouvement (sur un autre véhicule comme un vélo, cela évite de casser l'attache en cas de chute latérale), c'est le rôle de la liaison châssis/rotule. Nous avons utilisé une rotule issue de barres stabilisatrices de voiture.
*La liaison entre la rotule et le châssis : un tube fixé au châssis avec une plaque taraudée au bout, qui permet d'accueillir la tige filetée de la rotule, et permet le tangage.
*La liaison entre la rotule et le châssis : un tube fixé au châssis avec une plaque taraudée au bout, qui permet d'accueillir la tige filetée de la rotule, et permet le tangage à 360°.
*La liaison entre la rotule et l'ancrage : des tubes coupés en biseau et soudés pour rattraper la différence de hauteur entre le châssis et l'ancrage du véhicule. Cette partie vient s'arrimer sur l'ancrage avec une manivelle. Cette pièce s'attache à la rotule grâce la vis originelle de la rotule : le tube du Z est plaqué entre un écrou et la rotule.
*La liaison entre la rotule et l'ancrage : cette pièce est constituée de tubes coupés en biseau et soudés pour rattraper la différence de hauteur entre le châssis et l'ancrage du véhicule (forme un "Z"). Cette partie vient s'arrimer sur l'ancrage avec une manivelle. Pour s'arrimer, on vient emboiter le Z dans l'ancrage, et on vis à l'aide de la manivelle ces deux pièces. Cette pièce s'attache à la rotule grâce à la vis originelle de la rotule : le tube du Z est plaqué entre un écrou et la rotule.
*L'ancrage : l'ancrage est une pièce qui vient se fixer solidement sur le véhicule, et offre une accroche rapide avec la remorque. Cette pièce peut être laissée de manière "permanente" sur le véhicule, elle peut prendre quelques minutes à installer/désinstaller.</translate>
*L'ancrage : l'ancrage est une pièce qui vient se fixer solidement sur le véhicule, et offre une accroche rapide avec la remorque. Cette pièce peut être laissée de manière "permanente" sur le véhicule, elle peut prendre quelques minutes à installer/désinstaller.</translate>
|Step_Picture_00=Remorque_officielle_474809330_1603850830496140_8924683250084934304_n.jpg
|Step_Picture_00=Remorque_officielle_474809330_1603850830496140_8924683250084934304_n.jpg
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{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Attache - liaison rotule/châssis</translate>
|Step_Title=<translate>Attache - liaison rotule/châssis</translate>
|Step_Content=<translate>Coupez un tube carré de largeur 20mm, d’épaisseur 1,5 mm et de longueur 315 mm (à adapter en fonction de la liaison que vous voulez faire : il faut simplement que le tube dépasse un peu à l’avant du châssis)
|Step_Content=<translate>*Coupez un tube carré de largeur 20mm, d’épaisseur 1,5 mm et de longueur 315 mm (à adapter en fonction de la liaison que vous voulez faire : il faut simplement que le tube dépasse un peu à l’avant du châssis).
 
*Découpez une petite plaquette d’acier de la dimension de la section du tube (épaisseur > 4 mm).
<nowiki>*</nowiki>Découpez une petite plaquette d’acier de la dimension de la section du tube (épaisseur >4mm).
*Réalisez un taraudage adapté au filetage de l'axe de la rotule : percez la plaquette au centre à 7mm et taraudez-la avec un diamètre équivalent au filetage de l'axe de la rotule (M8).<br />
 
{{Info|Pensez à faire plusieurs passages lorsque vous percez des gros trous pour ne pas user trop vite vos forets: par exemple pour un trou de 8 mm, percez d'abord à 3 mm, puis à 6 mm, et enfin à 8 mm.}}
<nowiki>*</nowiki>Réalisez un taraudage adapté au filetage de l'axe de la rotule : percez la plaquette au centre à 7mm et taraudez-la avec un diamètre équivalent au filetage de l'axe de la rotule (M8).
 
<br />{{Info|Pensez à faire plusieurs passages lorsque vous percez des gros trous pour ne pas user trop vite vos forets: par exemple pour un trou de 8mm, percez d'abord à 3mm, puis à 6mm, puis à 8mm.}}


<br />
<br />
Ligne 227 : Ligne 238 :




La rotule offre une rotation latérale de 360°, une rotation verticale d'environ 30° , et un tangage d'environ 20°. Afin de prévoir au cas où un tangage excessif (en cas de chute latérale), on va ajouter une liaison tangage, en venant visser partiellement l'axe de la rotule dans un taraudage.
La rotule offre une rotation latérale de 360°, une rotation verticale d'environ ± 45°, et un tangage d'environ ± 20°. Afin de prévoir au cas où un tangage excessif (en cas de chute latérale), on va ajouter une liaison tangage, en venant visser partiellement l'axe de la rotule dans le taraudage de la liaison châssis/rotule .
 
 
Ce système nous a été présenté par Bernard Mathieu De Vienne (Association Cycles Saveuil) que nous remercions chaleureusement pour son aide.
 
Pour le réaliser:


*Coupez la barre stabilisatrice en deux : une seule moitié vous sera utile pour la liaison, récupérez la rotule. Taillez l'axe en pointe avec une ponceuse à bande par exemple.
*Coupez la barre stabilisatrice en deux : une seule moitié vous sera utile pour la liaison, récupérez la rotule. Taillez l'axe en pointe avec une ponceuse à bande par exemple.
*Filetez l'axe coupé.</translate>
*Filetez l'axe coupé.</translate>
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|Step_Picture_01=Remorque_officielle_3bc2a6a1-5272-469c-8db6-6e1d3fca8c92.jpeg
|Step_Picture_01=Remorque_officielle_3bc2a6a1-5272-469c-8db6-6e1d3fca8c92.jpeg
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|Step_Picture_02=Remorque_officielle_473883764_1356308399071276_7915770311936167059_n.jpg
Ligne 247 : Ligne 253 :
*Coupez un tube carré avec un biseau de chaque côté (adaptez le biseau en fonction de l’angle que vous souhaitez avoir).
*Coupez un tube carré avec un biseau de chaque côté (adaptez le biseau en fonction de l’angle que vous souhaitez avoir).
*Coupez 2 autres tubes carrés avec le même biseau sur chaque bout.
*Coupez 2 autres tubes carrés avec le même biseau sur chaque bout.
*Percer à 8mm de chaque côté du Z.
*Percez à 8 mm de chaque côté du Z.
*Soudez les 3 tubes pour former le Z comme sur la photo ci-contre.
*Soudez les 3 tubes pour former le Z comme sur la photo ci-contre.


La butée:
La butée:


Afin que cette partie s'aligne bien avec le trou de l’ancrage, vous pouvez souder une petite plaquette en dessous afin de créer une butée avec le bord du tube de l'ancrage. Pour cela, avant de souder la plaquette, vissez le Z avec l'ancrage afin de savoir où souder la butée.
Afin que le trou du Z s'aligne bien avec le trou de l’ancrage, vous pouvez souder une petite plaquette en dessous afin de créer une butée avec le bord du tube de l'ancrage. Pour cela, avant de souder la plaquette, vissez le Z avec l'ancrage afin de savoir où souder la butée.


<br />La manivelle:
<br />La manivelle:


Pour pouvoir serrer à la main le bras à l'ancrage, nous avons réalisé une manivelle (12cm de long) pour avoir du couple lors du serrage. Pour cela, nous avons soudé une vis M8 à deux écrous (pour surélever la manivelle par rapport au tube), et soudé le haut de l'écrou à une tige ronde. Pour souder plus facilement la tige, aplanissez l'endroit de la soudure avec une meuleuse munie d'un disque à lamelles.</translate>
Pour pouvoir serrer à la main le bras à l'ancrage, nous avons réalisé une manivelle (12 cm de long) pour avoir du couple lors du serrage. Pour cela, nous avons soudé une vis M8 à deux écrous (pour surélever la manivelle par rapport au tube), et soudé le haut de l'écrou à une tige ronde. Pour souder plus facilement la tige, aplanissez l'endroit de la soudure avec une meuleuse munie d'un disque à lamelles.</translate>
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{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Attache - ancrage</translate>
|Step_Title=<translate>Attache - ancrage</translate>
|Step_Content=<translate>Ajouter photo plaques sur attaches taxis (d'un côté)
|Step_Content=<translate>Cette pièce est unique et s’adapte en fonction du véhicule que vous avez. Nous avons ici réalisé un ancrage pour 2 types de fauteuils roulants électriques. Cette pièce est destinée à rester sur le fauteuil et permettre un accrochage rapide de la remorque sur celui-ci (avec le système de manivelle créé à l’étape précédente). On peut cependant attacher et détacher cette pièce en relativement peu de temps (pour l'attache 1 : 1 min, pour l'attache 2 : 3 min).
 
 
Cette pièce est unique et s’adapte en fonction du véhicule que vous avez. Nous avons ici réalisé un ancrage pour 2 types de fauteuils roulants électriques. Cette pièce est destinée à rester sur le fauteuil et permettre un accrochage rapide de la remorque sur celui-ci (avec le système de manivelle créé à l’étape précédente). On peut cependant attacher et détacher cette pièce en relativement peu de temps (pour l'attache 1 : 1min, pour l'attache 2 : 3min).




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Pour cela:
Pour cela:


*Coupez le tube carré femelle pouvant accueillir le tube mâle:  10 cm de long, 25mm de large, 2mm d'épaisseur.
*Coupez le tube carré femelle pouvant accueillir le tube mâle:  10 cm de long, 25 mm de large, 2 mm d'épaisseur.
*Soudez une plaquette épaisse sous le bord du tube (>5mm d'épaisseur)
*Soudez une plaquette épaisse sous le bord du tube (> 5 mm d'épaisseur).
*Percez au centre de la plaquette à 7mm de diamètre, tarauder pour accueillir du M8.
*Percez au centre de la plaquette à 7 mm de diamètre, taraudez pour accueillir du M8.
*Réalisez la fente :
*Réalisez la fente :
**Tronçonner le tube à plusieurs reprises
**Tronçonnez le tube à plusieurs reprises à l'aide d'une disqueuse
**Retirer les languettes à la pince
**Retirez les languettes à la pince
**Passer avec un disque à ébarber dans la fente.<br />
**Passer avec un disque à ébarber dans la fente.<br />


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Les étapes:
Les étapes:


*Coupez une plaque de 4 mm d’épaisseur et des dimensions de la platine( dans notre cas 115 mm sur 33 mm). Percez 2 trous de 9 mm de diamètre (pour accueillir du M8 avec un petit jeu) aux 2 extrémités de la plaque (il faut que ces trous soient situés en face de ceux sur la plaque du fauteuil).
*Coupez une plaque de 4 mm d’épaisseur et des dimensions de la platine (dans notre cas 115 mm sur 33 mm). Percez 2 trous de 9 mm de diamètre (pour accueillir du M8 avec un petit jeu) aux 2 extrémités de la plaque (il faut que ces trous soient situés en face de ceux sur la plaque du fauteuil).
*Pointez puis soudez la pièce d'arrimage au milieu de la plaque.
*Pointez puis soudez la pièce d'arrimage au milieu de la plaque.
{{Warning|Cette soudure est très importante pour la solidité de l’attache. Un gros effort (force) va s'exercer sur le haut de la soudure dû au poids du Z qui va pendre relié à l'ancrage. Soignez la soudure du haut et celles sur les côtés!}}
{{Warning|Cette soudure est très importante pour la solidité de l’attache. Un gros effort (force) va s'exercer sur le haut de la soudure dû au poids du Z qui va pendre relié à l'ancrage. Soignez la soudure du haut et celles sur les côtés!}}
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Ancrage 2 :
Ancrage 2 :


Pour l'ancrage 2, nous avons choisi de nous ancrer sur les deux attaches taxis (plaques épaisses avec des gros trous oblong au centre). Le système de fixation est le suivant : deux plaques viennent pincer chaque attache taxi, en les serrant avec deux boulons chacun. A noter que ces attaches taxi ne sont pas standards, elles sont souvent de travers par rapport à la verticale.  
Pour l'ancrage 2, nous avons choisi de nous ancrer sur les deux attaches taxis (plaques épaisses avec des gros trous oblong au centre). Le système de fixation est le suivant : deux plaques viennent pincer chaque attache taxi, en les serrant avec deux boulons chacun. A noter que ces attaches taxi ne sont pas standard, elles sont souvent de travers par rapport à la verticale.  


Nous avons dimensionné cette pièce selon la pièce en Z que nous avions réalisé pour la bonne hauteur de l'ancrage 1. Ainsi, cette pièce n'est pas censée réaliser un "L" pour rattraper la bonne hauteur du Z (c'est au rôle du Z de rattraper la hauteur de fixation du fauteuil).
Nous avons dimensionné cette pièce selon la pièce en Z que nous avions réalisé pour la bonne hauteur de l'ancrage 1. Ainsi, cette pièce n'est pas censée réaliser un "L" pour rattraper la bonne hauteur du Z (c'est au rôle du Z de rattraper la hauteur de fixation du fauteuil).
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*Coupez le tube carré biseauté de chaque côté : le tube sera soudé à une plaque de chaque côté, qui doivent être plaquées sur les attaches taxis (qui sont de travers). Ainsi les tubes carrés seront biseautés en parallèle des attaches taxis.
*Coupez le tube carré biseauté de chaque côté : le tube sera soudé à une plaque de chaque côté, qui doivent être plaquées sur les attaches taxis (qui sont de travers). Ainsi les tubes carrés seront biseautés en parallèle des attaches taxis.
*Coupez 4 plaques rectangles identiques de 4mm d'épaisseur (dans notre cas 4cm sur 15cm)
*Coupez 4 plaques rectangles identiques de 4 mm d'épaisseur (dans notre cas 4 cm sur 15 cm)
*Percez chaque plaque avec deux trous de 7mm centrés pour accueillir des vis M6 (les deux trous doivent être au même écartement sur chaque plaque pour que les vis traversent bien les deux trous). Les trous doivent être assez écartés pour permettre qu'elles entourent les attaches taxis.
*Percez chaque plaque avec deux trous de 7 mm centrés pour accueillir des vis M6 (les deux trous doivent être au même écartement sur chaque plaque pour que les vis traversent bien les deux trous). Les trous doivent être assez écartés pour permettre qu'elles entourent les attaches taxis.
*Soudez une plaque de chaque côté du tube carré biseauté.
*Soudez une plaque de chaque côté du tube carré biseauté.
*Soudez cette pièce au tube d'arrimage.{{Warning|Attention, les soudures entre le tube et les plaques (celles en haut) vont recevoir beaucoup d'efforts, soignez bien ces soudures.}} <br /></translate>
*Soudez cette pièce au tube d'arrimage.
{{Warning|Attention, les soudures entre le tube et les plaques (celles en haut) vont recevoir beaucoup d'efforts, soignez bien ces soudures.}}
 
<br /></translate>
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Ligne 329 : Ligne 335 :
{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Sangle de maintien</translate>
|Step_Title=<translate>Sangle de maintien</translate>
|Step_Content=<translate>Pour maintenir la boite calée dans le châssis pendant que la remorque roule, nous avons opté pour un système de sangles entourant le haut de la boîte.  
|Step_Content=<translate>Pour maintenir la boite calée dans le châssis pendant que la remorque roule, nous avons opté pour un système de sangles entourant le haut de la boite.  


Les deux morceaux de sangle sont fixés sur des "ranges sangles": des tubes carrés avec un fer plat soudé au fond de chaque, soudés sur le côté du châssis.</translate>
Les deux morceaux de sangle sont fixés sur des "ranges sangles": des tubes carrés avec un fer plat soudé au fond de chaque, soudés sur le côté du châssis.</translate>
Ligne 342 : Ligne 348 :




Le système de pieds ajustables est le suivant : un tube carré de section inférieure qui rentre à l'intérieur d'un tube plus grand. Lorsque la remorque roule, le pied est à l'intérieur du tube et tient grâce à une goupille (position haute du pied). Lorsque la remorque est à l'arrêt, on enlève la goupille, le pied glisse jusqu'à toucher le sol et à l'aide d'une vis, on vient plaquer le petit tube dans le grand : le pied tient et la remorque est stabilisée (voir photo ci-contre).
Le système de pieds ajustables est le suivant : un tube carré de section inférieure qui rentre à l'intérieur d'un tube plus grand. Lorsque la remorque roule, le pied est à l'intérieur du tube et tient grâce à une goupille (position haute du pied). Lorsque la remorque est à l'arrêt, on enlève la goupille, le pied glisse jusqu'à toucher le sol et à l'aide d'une vis papillon (demie rondelle soudée sur une vis), on vient plaquer le petit tube dans le grand : le pied tient et la remorque est stabilisée (voir photo ci-contre).




Pour cela :
Pour cela :


* Sur deux côtés du châssis, soudez les 2 tubes carrés de longueur 25 cm sur les cornières
*Sur deux côtés du châssis, soudez les 2 tubes carrés de longueur 25 cm sur les cornières


* Coupez des tubes carrés dont la largeur extérieure est un peu plus petite que la largeur intérieure des plus gros tubes (15 mm de large sur 400 mm de long)
*Coupez des tubes carrés dont la largeur extérieure est un peu plus petite que la largeur intérieure des plus gros tubes (15 mm de large sur 400 mm de long)
{{Warning|La longueur des pieds dépend entièrement de la hauteur de roues : les mesures données ici sont celles adaptées pour les roues que nous avions, à vous d'adapter en fonction de ce que vous avez.}}
{{Warning|La longueur des pieds dépend entièrement de la hauteur de roues : les mesures données ici sont celles adaptées pour les roues que nous avions (34 cm de diamètre), à vous d'adapter en fonction de ce que vous avez.}}




Pour chaque pied :
Pour chaque pied :


* Trouez entièrement le tube du pied et de son support (pour pouvoir mettre une goupille)
*Trouez entièrement le tube du pied et de son support (pour pouvoir mettre une goupille)


* Trouez une paroi du support seulement (pour pouvoir y insérer une vis qui appuiera sur le pied en position basse) + le tarauder.
*Trouez une paroi du support seulement (pour pouvoir y insérer une vis qui appuiera sur le pied en position basse) + le tarauder.
{{Idea|Afin de percer les 2 tubes d'un même trou pour un meilleur alignement, nous avons inséré des cales entre les 2 pour contraindre le petit tube dans le grand. Ils se retrouvent alors plaqués sur un côté et il est alors plus facile de percer droit.}}
{{Idea|Afin de percer les 2 tubes d'un même trou pour un meilleur alignement, nous avons inséré des cales entre les 2 pour contraindre le petit tube dans le grand. Ils se retrouvent alors plaqués sur un côté et il est alors plus facile de percer droit.}}




Rajoutez des bouts de bois en dessous du pied pour que le contact avec le sol soit plus stable.
Rajoutez des plaquettes de bois en dessous du pied pour que le contact avec le sol soit plus stable.




Réalisez des goupilles adaptées au trou que vous avez fait (ou l'inverse en fonction de ce que vous avez). Nous avons fait les goupilles nous-mêmes à part d'une tige filetée en la tordant petit à petit sur un étau : le résultat est très satisfaisant et nous avons pu adapter la courbure au tube carré que nous avions (pensez à poncer la partie de la goupille qui s'insère dans le trou pour qu'elle glisse bien).
Réalisez des goupilles adaptées au trou que vous avez fait (ou l'inverse en fonction de ce que vous avez). Nous avons fait les goupilles nous-mêmes à partir d'une tige filetée (c'est mieux si la tige est lisse) en la tordant petit à petit sur un étau : le résultat est très satisfaisant et nous avons pu adapter la courbure au tube carré que nous avions (pensez à poncer la partie de la goupille qui s'insère dans le trou pour qu'elle glisse bien).</translate>
 
<br /></translate>
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{{Tuto Step
|Step_Title=<translate>Rangement de l'attache</translate>
|Step_Content=<translate>Si les dimensions de votre châssis le permettent, vous pouvez réaliser une pièce pour ranger l'attache sous votre châssis. En effet, grâce à la rotule, à la hauteur du châssis et à la position des roues, nous pouvons faire passer le bras sous le châssis sans toucher les roues.
Nous avons réalisé une pièce en forme de clanche que nous avons soudé sous la barre du milieu du châssis.
L'attache viens ainsi se clipser dans la clanche.</translate>
|Step_Picture_00=Remorque_officielle_474031619_1036103151895202_5683532141543205161_n.jpg
|Step_Picture_01=Remorque_officielle_474581184_2543057139238912_136079813137867677_n_1_.jpg
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{{Tuto Step
|Step_Title=<translate>Réflecteurs optiques</translate>
|Step_Content=<translate>Pensez à mettre un système de réflecteurs optiques pour plus de sécurité lorsque vous roulez de nuit.
Nous avons fixé un catadioptre issue d'un triangle de présignalisation avec deux colliers de serrage en plastique accrochés à l'arrière du châssis.
Nous avons aussi fixé des catadioptres sur les deux roues du châssis.</translate>
|Step_Picture_00=Remorque_officielle_474444343_1734161987142312_6372736123249024556_n.jpg
}}
}}
{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Accessoires spécifiques</translate>
|Step_Title=<translate>Accessoires spécifiques</translate>
|Step_Content=<translate>La suite concerne des accessoires du châssis qui peuvent ne pas être nécessaires en fonction de l'utilisation de la remorque. Dans notre cas, la remorque devait être à une certaine hauteur pour la personne qui allait l'utiliser : nous avons donc fait un système où la boîte glisse dans les cornières et grâce à des goupilles reste en l'air à la hauteur voulue.
|Step_Content=<translate>La suite concerne des accessoires du châssis qui peuvent ne pas être nécessaires en fonction de l'utilisation de la remorque. Dans notre cas, la remorque devait être à une certaine hauteur pour la personne qui allait l'utiliser : nous avons donc fait un système où la boite glisse dans les cornières et grâce à des goupilles reste à la hauteur fixée.




Ligne 386 : Ligne 412 :
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{{Tuto Step
{{Tuto Step
|Step_Title=<translate>Coque en bois</translate>
|Step_Title=<translate>Boite en bois</translate>
|Step_Content=<translate>Pour rappel, cette remorque a pour but d'accompagner une artiste
|Step_Content=<translate>Pour rappel, cette remorque a pour but d'accompagner une artiste


sur scène et ses demandes étaient donc très spécifiques : les dimensions de la boîte, les compartiments, la hauteur des rangements,... sont adaptés à la personne pour laquelle nous avons fait cette remorque.
sur scène et ses demandes étaient donc très spécifiques : les dimensions de la boite, les compartiments, la hauteur des rangements,... sont adaptés à la personne pour laquelle nous avons fait cette remorque.




Nous ne détaillerons pas les étapes pour fabriquer cette boîte car elle est spécifique que à un usage. On laisse chacun·e libre de faire la boîte avec les dimensions qu'iel souhaite.
Nous ne détaillerons pas les étapes pour fabriquer cette boite car elle n'est spécifique qu'à un usage. On laisse chacun·e libre de faire la boite avec les dimensions qu'iel souhaite.




Vous trouverez tout de même les plans CAO et 2D avec les fichiers en début de tutoriel.
Vous trouverez tout de même les plans CAO avec les fichiers en début de tutoriel.




Et voici un petit aperçu de la boîte telle que nous l'avons réalisé.</translate>
Et voici un petit aperçu de la boite telle que nous l'avons réalisé.</translate>
|Step_Picture_00=Remorque_officielle_Bo_te_decoree_2.jpg
|Step_Picture_00=Remorque_officielle_Bo_te_decoree_2.jpg
}}
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{{Notes
{{Notes
|Notes=<translate></translate>
|Notes=<translate>Cette remorque a été co-conçue et co-réalisée par Camille Bellemin, Nour Benarous, Amélie Berdou, Martin Ernst et François Michot.
 
Vous pouvez retrouver le tutoriel dédié à la liaison rotule sous le nom "Liaison rotule pour remorque".
 
<br /></translate>
}}
}}
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{{PageLang
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{{Tuto Status
{{Tuto Status
|Complete=Draft
|Complete=Published
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Dernière version du 5 février 2025 à 16:54

Prototype de avatarAmélie | Catégories : Matériaux

Ce tutoriel décrit la fabrication d’une remorque low-tech conçue pour être attachée à un fauteuil roulant électrique. Pensée pour être fonctionnelle, légère et accessible, cette remorque permet de transporter facilement des objets.

Licence : Attribution (CC BY)

Introduction

Ce tutoriel a été réalisé dans le cadre d’un projet étudiant au cours du semestre PISTE (Pour une Ingénierie Sobre Techno et Eco-responsable) porté par l’Ense3 à Grenoble. Le projet se nomme “Handi’capable” et avait pour objectif de construire une remorque low-tech pour une artiste pouvant s’accrocher à son fauteuil roulant électrique lors de ses spectacles. Ce tutoriel peut s'adapter à d'autres véhicules, notamment des vélos, en modifiant la pièce d'"ancrage" au vélo.

Dans un souci de temps, nous avons décidé d'utiliser des pièces d'acier et des plaques de contreplaquée neuves . Le châssis et la boite nous ont coûté environ 100€ chaqu'un.e. Cependant, il est complètement possible de réaliser la remorque à partir de matériaux de récupération.

Matériaux

Pour le châssis :

  • Tubes carrés en acier de 20 mm de largeur et 1.5 mm d'épaisseur :
    • 2 de 610 mm de longueur (bords du cadre)
    • 3 de 370 mm de longueur (bords du cadre + barre centrale)
    • 1 de 400 mm de longueur (attache)
    • 2 de 200 mm de longueur (support pieds)
  • 2 tubes carrés en acier de 15 mm de largeur, 400 mm de longueur, et 1.5 mm d'épaisseur (pieds)
  • 2 plaquettes d'acier de 30 mm/30 mm d'épaisseur 2 mm (pieds)
  • 2 morceaux de bois d'épaisseur 20 mm (pieds)
  • 4 cornières en acier 20 mm de largeur et 3 mm d'épaisseur, 500 mm de longueur
  • Fers plats en acier de 20 mm de largeur et 4 mm d'épaisseur :
    • 4 de 100 mm de longueur (contreventements base châssis)
    • 8 de 200 mm de longueur (contreventements cornières)
  • 2 équerres en acier : 60/60 mm épaisseur 2 mm
  • 2 roues de 340 mm de diamètre
  • 2 vis, 2 goupilles
  • Des réflecteurs optiques


Pour l'attache (entre le châssis et le fauteuil roulant électrique) :

  • Tubes carrés en acier de 20 mm de largeur et 1.5 mm d'épaisseur :
    • 2 de 120 mm de longueur (parties horizontales du Z)
    • 1 de 170 mm de longueur (partie diagonale du Z)
  • 1 rotule issue de barres stabilisatrices de voiture
  • 1 vis, 2 écrous, 1 barre en acier (manivelle)

Pour l'ancrage 1:

  • 1 tube carré en acier de 25 mm de côté, 2 mm d'épaisseur, 110 mm de longueur
  • 1 plaque d'acier de 115 mm sur 35 mm, d'épaisseur 4 mm

Pour l'ancrage 2:

  • Tubes carrés en acier de 25 mm de côté, 2 mm d'épaisseur, 110 mm de longueur
    • 1 de 270 mm de longueur (liaison des plaques)
    • 1 de 90 mm de longueur (barre verticale)
    • 1 de 160 mm de longueur (liaison avec le Z)
  • 4 plaques d'acier de 150 mm sur 40 mm, d'épaisseur 4mm


Accessoires pour le châssis :

  • Goupilles
  • Ficelles
  • Plaquettes d'acier

Outils

Nous avons réalisé ce projet dans le fablab de notre école : nous avions donc de nombreux outils à notre disposition. Cependant, certaines étapes peuvent être réalisées avec d'autres outils, cette liste n'est qu'indicative.


  • Perceuse/visseuse
  • Scie circulaire fixe à métal inclinable (ou scie à ruban)
  • Meuleuse/disqueuse
  • Ponceuse à bande fixe
  • Scie circulaire à bois portative
  • Poste à souder à la baguette
  • Perceuse à colonne
  • Scie à chantourner
  • Scie à ruban
  • Tarauds et tourne-à-gauche
  • Filière à main
  • Outils à main divers: pinces, marteau, limes à métaux, pointeau, clefs, etc...
  • Équipements de Protection Individuelle (EPI) : blouse, gants, casque, lunettes, masque, tablier en cuir et masque de soudure (pour certaines étapes)

Étape 1 - Réfléchir au projet

Avant de se lancer dans la construction d'une remorque, il est important de réfléchir aux usages prévus, aux contraintes techniques et aux matériaux disponibles.

Réalisez vos plans, puis lancez-vous dans la fabrication.

Pour notre projet, la remorque devait être légère, stable et rapidement attachable à un fauteuil roulant électrique, tout en étant robuste pour transporter le matériel nécessaire aux spectacles.

Étape 2 - Châssis

Le châssis constitue la base de la remorque et joue un rôle crucial dans la stabilité et la solidité de l’ensemble. Pour notre projet, nous avons choisi un châssis en acier, plus lourd que de l'aluminium et du bois mais robuste, le tout associé à une boite en bois. Il est constitué d'une base rectangle, montée de cornières pour caler la boite. Les plans détaillés et les CAO sont disponibles dans les fichiers joints à ce tuto.


Étape 3 - Châssis - base

Pour réaliser la base rectangulaire du châssis:


A l'aide d'une scie circulaire fixe à métal (ou scie à ruban), découper les 4 tubes carrés, et les 4 morceaux de fer plats coupés en biseau.

Il est nécessaire de blanchir les zones à souder pour garantir une soudure de qualité. Pour cela, utilisez une meuleuse avec un disque abrasif ou une ponceuse bande abrasive (ou un papier de verre à la main pour les zones difficiles d’accès) pour décaper les zones où les soudures seront réalisées. Blanchissez environ 2 cm autour des bords à chaque joint de soudure pour garantir une surface propre.


Disposez les tubes pour former un rectangle. Serrez le tout avec des serres joints. Vérifiez que les angles sont parfaitement droits à l’aide d’une équerre. Réalisez un pointage.


Le pointage permet d’éviter les déformations des pièces dues à un changement de température trop rapide. Si la structure est pointée, elle ne se déformera quasiment pas lors du soudage.
Procédez à la soudure définitive des quatre coins une fois que tout est correctement positionné et pointé.
Soudez en plusieurs passes courtes pour éviter les déformations dues à un excès de chaleur.

Il est impératif de bien porter les EPI (masque à soudure, gants isolants et tablier en cuir) lors de la soudure sous risque de blessure.

Ajout des contreventements : placez les contreventements en diagonale dans le cadre. Ces pièces renforcent la structure et préviennent les déformations sous charge.


Vous pouvez contraindre la structure avec des serre-joints pour rattraper des angles, une fois les contreventements soudés, la structure sera très rigide.


Pointez d’abord les contreventements à leurs extrémités pour les stabiliser. Lorsque tout est bien positionné, soudez-les définitivement en procédant, là encore, par petites passes pour éviter les déformations (plus une partie chauffe beaucoup et plus elle se déformera en refroidissant).

Aux 4 coins des tubes, coupez légèrement les coins du châssis en prévention des cornières (voir photo ci-contre).

Étape 4 - Châssis - montants

Pour réaliser des montants, nous avons utilisé des cornières dans l'optique que la boite puisse glisser à l'intérieur. Libre à vous de choisir des montants qui correspondent à votre besoin.


Positionnez les quatre cornières métalliques verticales aux coins externes du châssis.


Pointez toutes les cornières à leur base puis soudez.


Après la soudure, il est possible que les cornières aient subi de légères déformations en raison de l’échauffement puis refroidissement du métal.


Ajustez progressivement les cornières pour qu’elles soient droites, en les contraignant, puis en soudant des contreventements entre les cornières et la base du châssis. Pour cela, vous pouvez réaliser le montage en photo ci-contre : un tube solidaire de la table sert de support pour tirer avec un serre-joint la cornière vers la position droite. Quand la position vous convient, pointez le contreventement, puis soudez-le. Il faut donc faire cette manip 8 fois (si vos cornières ne sont vraiment pas droites! Dans ce cas, bon courage ;))


L’ajout des contreventements est essentiel pour maintenir l’intégrité de la structure et éviter que les cornières ne bougent ou ne se désalignent après cette étape.


Étape 5 - Châssis - roues

Il est conseillé que le centre de gravité de la remorque soit décalé de l'axe des roues, pour que la remorque penche naturellement vers l'avant et éviter qu'elle ne bascule.

Attention, plus vous désaxerez les roues du centre de gravité, plus vous aurez un grand effort à supporter au niveau de l'ancrage au fauteuil (voir l'étape Attache - ancrage).


Équerres :

  • Réalisez des trous dans les équerres au diamètre de l’axe des roues + 1 mm pour garantir un ajustement facile.
  • Percez les équerres à l'endroit de l'axe voulu des roues.
  • Disquez légèrement les équerres avec une disqueuse pour y former des rainures permettant d’insérer les axes des roues.
  • Soudez les équerres au châssis (soyez sûr·e que la roue est suffisamment écartée du châssis pour ne pas qu'elle le touche en roulant).
  • Contreventez les équerres.


Fixation des roues :

  • Pour fixer les roues aux équerres on réalise le montage suivant : Rondelle > Équerre > Rondelle > Châssis > Écrou (voir schéma ci-contre)
  • Testez le montage en faisant tourner les roues. Elles doivent tourner librement sans jeu latéral excessif.

Étape 6 - Attache - fonctionnement global

L'attache est une partie importante de ce projet. En effet, il a fallu trouver un système robuste qui permettait à la fois une grande liberté de mouvement, le tout pouvant s'attacher rapidement sur un fauteuil roulant électrique.


L'avantage de cette attache est qu'elle est adaptable à tout type de véhicule dans la mesure où les points centraux sont la rotule et la fixation sur le châssis. Si vous souhaitez refaire cette attache pour un vélo, il vous faudra alors changer la pièce d'ancrage sur votre vélo .


Notre attache constitue le système de lien entre le fauteuil et la remorque. Elle se compose de 4 parties:

  • La rotule : elle permet d'autoriser les rotations libres entre le châssis et le fauteuil. La rotule ne permettant pas un tangage très important, il est important de permettre ce mouvement (sur un autre véhicule comme un vélo, cela évite de casser l'attache en cas de chute latérale), c'est le rôle de la liaison châssis/rotule. Nous avons utilisé une rotule issue de barres stabilisatrices de voiture.
  • La liaison entre la rotule et le châssis : un tube fixé au châssis avec une plaque taraudée au bout, qui permet d'accueillir la tige filetée de la rotule, et permet le tangage à 360°.
  • La liaison entre la rotule et l'ancrage : cette pièce est constituée de tubes coupés en biseau et soudés pour rattraper la différence de hauteur entre le châssis et l'ancrage du véhicule (forme un "Z"). Cette partie vient s'arrimer sur l'ancrage avec une manivelle. Pour s'arrimer, on vient emboiter le Z dans l'ancrage, et on vis à l'aide de la manivelle ces deux pièces. Cette pièce s'attache à la rotule grâce à la vis originelle de la rotule : le tube du Z est plaqué entre un écrou et la rotule.
  • L'ancrage : l'ancrage est une pièce qui vient se fixer solidement sur le véhicule, et offre une accroche rapide avec la remorque. Cette pièce peut être laissée de manière "permanente" sur le véhicule, elle peut prendre quelques minutes à installer/désinstaller.


Étape 7 - Attache - liaison rotule/châssis

  • Coupez un tube carré de largeur 20mm, d’épaisseur 1,5 mm et de longueur 315 mm (à adapter en fonction de la liaison que vous voulez faire : il faut simplement que le tube dépasse un peu à l’avant du châssis).
  • Découpez une petite plaquette d’acier de la dimension de la section du tube (épaisseur > 4 mm).
  • Réalisez un taraudage adapté au filetage de l'axe de la rotule : percez la plaquette au centre à 7mm et taraudez-la avec un diamètre équivalent au filetage de l'axe de la rotule (M8).
Pensez à faire plusieurs passages lorsque vous percez des gros trous pour ne pas user trop vite vos forets: par exemple pour un trou de 8 mm, percez d'abord à 3 mm, puis à 6 mm, et enfin à 8 mm.


  • Soudez cette plaquette sur la section du tube.
  • Venez ensuite souder le tube en dessous du châssis comme indiqué sur les plans.



Étape 8 - Attache - rotule

Pour réaliser notre rotule, pièce centrale de notre remorque, nous avons récupéré des barres stabilisatrices de voiture, issues du système de suspension. Les garages automobiles jettent régulièrement ce genre de pièces lors des contrôles techniques, qui sont toujours largement fonctionnelles pour l'utiliser sur une remorque. Le premier garage que nous avons croisé nous en a donné deux paires.


La rotule offre une rotation latérale de 360°, une rotation verticale d'environ ± 45°, et un tangage d'environ ± 20°. Afin de prévoir au cas où un tangage excessif (en cas de chute latérale), on va ajouter une liaison tangage, en venant visser partiellement l'axe de la rotule dans le taraudage de la liaison châssis/rotule .

  • Coupez la barre stabilisatrice en deux : une seule moitié vous sera utile pour la liaison, récupérez la rotule. Taillez l'axe en pointe avec une ponceuse à bande par exemple.
  • Filetez l'axe coupé.


#if: Modèle:Tuto StepImage

Modèle:Tuto Step Modèle:Tuto Step Modèle:Tuto Step Modèle:Tuto Step Modèle:Tuto Step Modèle:Tuto Step Modèle:Tuto Step Modèle:Notes Modèle:PageLang Modèle:Tuto Status