Wheelchair front support and side tube connection folding mechanism

Abstract

This utility model discloses a folding mechanism for connecting the front support and side tube of a wheelchair, including a front support, a side tube, and a seat plate. One end of the front support is assembled with the front wheel, and the other end is provided with a first mounting bracket. One end of the side tube is assembled with the rear wheel, and the other end is provided with a second mounting bracket. The front support and the side tube are hinged together by a central shaft. The central shaft is rotatably inserted through the first and second mounting brackets and then fastened to the connecting piece of the seat plate by a fastening screw and a limiting rod. The folding mechanism of this utility model has a simple design. The front support, side tube, and seat plate are assembled as a whole by the central shaft. Through the cooperation of the threaded hole and the fastening screw, the front support, side tube, and seat plate can be fixed with a set of fasteners, which reduces the processing difficulty of the folding mechanism and simplifies assembly. It ensures both the hinged connection of the front support and the side tube and the fixed connection of the side tube and the seat plate.

Description

Technical Field

[0001] This utility model belongs to the field of wheelchair installation, specifically relating to a folding mechanism for connecting the front support and side tubes of a wheelchair. Background Technology

[0002] Electric wheelchairs are a new generation of intelligent wheelchairs that are modified and upgraded from traditional manual wheelchairs by adding high-performance power drive devices, intelligent control devices, batteries and other components. They have multiple functions such as forward movement, backward movement, turning, standing, lying down and folding. They can help disabled people, patients and the elderly with rehabilitation treatment and transportation, and are important assistive tools.

[0003] The existing folding mechanism of electric wheelchairs has a complicated installation between the front support, side tubes and seat plate. It requires the front support to be assembled with the side tubes and the front support / side tubes to be assembled with the seat plate. This not only results in many parts, but also makes product processing difficult and makes the wheelchair folding difficult. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a folding mechanism connecting the front support and side tubes of a wheelchair. The front support, side tubes, and seat plate are integrally assembled via a central shaft, simplifying the assembly process and reducing manufacturing difficulty. This utility model can be achieved through the following specific technical solutions:

[0005] The aforementioned wheelchair front support and side tube connection folding mechanism includes a front support, a side tube, and a seat plate. One end of the front support is assembled with the front wheel, and the other end is provided with a first mounting bracket. One end of the side tube is assembled with the rear wheel, and the other end is provided with a second mounting bracket. The front support and the side tube are hinged through a central shaft. The central shaft is rotatably inserted through the first and second mounting brackets in sequence and then fastened to the connecting piece of the seat plate by fastening screws and limiting rods.

[0006] Furthermore, the central shaft component includes a bushing tube with a threaded hole inside, the threaded hole being located on the axis of the bushing tube; after the central shaft component is assembled with the first and second assemblies, it is threadedly fastened to the threaded hole via a fastening screw and a connecting piece.

[0007] Furthermore, a plurality of reinforcing ribs are provided inside the bushing tube around the threaded hole, and a limiting rod is provided at one end of the reinforcing rib extending out of the bushing tube, which is inserted into the positioning hole on the connecting piece of the seat plate.

[0008] Furthermore, six reinforcing ribs are evenly arranged around the threaded hole, and one end of each of the six reinforcing ribs extends out of the bushing to provide a limiting rod, which is inserted into the six positioning holes provided on the connecting piece of the seat plate.

[0009] Furthermore, one end of the bushing is provided with an edge, and the other end without an edge is sleeved with the first and second fittings, and the outer diameters of the edge, the first fitting, and the second fitting are the same.

[0010] Furthermore, an end cap is integrally formed on one end of the bushing edge, and the end cap is provided with several weight-reducing holes.

[0011] Furthermore, a washer is provided between the first and second fittings on the bushing.

[0012] Furthermore, the front support has an arc-shaped structure, with a mounting tube at the end away from the first mounting bracket for mounting the front wheel mounting bracket; an mounting piece is provided on the inner arc side of the front support for mounting the foot pedal mounting bracket, and the mounting piece is positioned near the front wheel mounting bracket.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] (1) The folding mechanism of this utility model is simple in design. The front support, side tube and seat plate are assembled as a whole through the central shaft. Through the cooperation of the threaded hole and the fastening screw, the front support, side tube and seat plate can be fixed by a set of fasteners, which reduces the processing difficulty of the folding mechanism and makes the assembly simple. It can ensure the hinge connection between the front support and the side tube while also ensuring the fixed connection between the side tube and the seat plate.

[0015] (2) The bushing of the central shaft of this application is inserted and matched with the first and second assemblies to ensure the angle adjustment of the front support and the side tube, which facilitates the folding and folding of the wheelchair; the positioning rod is inserted into the positioning hole on the connecting piece of the seat plate to avoid the seat plate from loosening when the front support and the side tube are folded. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the folding mechanism (with front and rear wheels) of this utility model;

[0017] Figure 2 This is one of the structural schematic diagrams of the folding mechanism of this utility model;

[0018] Figure 3 This is the second structural schematic diagram of the folding mechanism of this utility model;

[0019] Figure 4 This is one of the structural schematic diagrams of the central shaft component of this utility model;

[0020] Figure 5 This is the second structural schematic diagram of the central shaft component of this utility model.

[0021] In the diagram: 1-Front support, 11-First assembly, 12-Mounting tube, 13-Assembly piece, 2-Side tube, 21-Second assembly, 3-Front wheel mounting bracket, 4-Front wheel, 5-Rear wheel, 6-Central shaft, 61-Shaft sleeve, 611-Edge, 62-Threaded hole, 63-Reinforcing rib, 64-Limiting rod, 65-End cap, 66-Washer, 7-Fasting screw. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] like Figures 1-3 As shown, a folding mechanism for connecting the front support and side tube of a wheelchair includes a front support 1, a side tube 2, and a seat plate. One end of the front support 1 is assembled with the front wheel 4, and the other end is provided with a first mounting bracket 11. One end of the side tube 2 is assembled with the rear wheel 5, and the other end is provided with a second mounting bracket 21. The front support 1 and the side tube 2 are hinged through a central shaft 6. The central shaft 6 can be rotatably inserted through the first mounting bracket 11 and the second mounting bracket 21 in sequence, and is then fastened to the connecting piece of the seat plate by a fastening screw 7 and a limiting rod 64.

[0024] It is understandable that the front support 1, side tube 2, and seat plate are assembled as a single unit via the central shaft 6, and the front support 1 and side tube 2 are hinged together via the central shaft tube 6 to ensure smooth folding of the folding mechanism; the fixed connection between the central shaft tube 6 and the seat plate connecting piece ensures the stability of the seat plate during folding. Through the cooperation of the fastening screws and the limiting rod 64, the front support 1, side tube 2, and seat plate can be fixed with a single set of fasteners, reducing the processing difficulty of the folding mechanism and simplifying assembly.

[0025] like Figure 4 and Figure 5 As shown, the central shaft component 6 includes a bushing 61 with a threaded hole 62 located on its axis. After assembly with the first assembly 11 and the second assembly 21, the central shaft component 6 is threadedly fastened to the threaded hole 62 via a connecting plate and fastening screws. Several reinforcing ribs 63 are provided inside the bushing 61 around the threaded hole 62. One end of each reinforcing rib 63 extends out of the bushing 61 and is fitted with a limiting rod 64, which is inserted into a positioning hole on the connecting plate of the base plate.

[0026] It is understandable that the bushing of the central shaft is inserted and matched with the first and second assemblies to ensure the angle adjustment of the front support and the side tube, which facilitates the folding and collapsing of the wheelchair; the positioning rod is inserted into the positioning hole on the connecting piece of the seat plate to avoid the seat plate from loosening when the front support and the side tube are folded.

[0027] In one specific embodiment, six reinforcing ribs 63 are evenly arranged around the threaded hole 62, and one end of each of the six reinforcing ribs 63 extends out of the bushing 61 to provide a limiting rod 64, which is inserted into the six positioning holes provided on the connecting piece of the base plate.

[0028] To ensure smooth assembly, one end of the bushing 61 is provided with an edge 611, and the end without the edge 611 is fitted with the first mounting piece 11 and the second mounting piece 21. The outer diameters of the edge 611, the first mounting piece 11, and the second mounting piece 21 are the same. Alternatively, it may be necessary to ensure that the outer diameter of the edge 611 is not less than the outer diameter of the first mounting piece 11 and the second mounting piece 21. An end cap 65 is integrally formed on the end of the bushing 61 with the edge 611, and the end cap 65 has several weight-reducing holes. A washer 66 is provided between the first mounting piece 11 and the second mounting piece 21 on the bushing 61 for vibration damping.

[0029] In addition, the front support 1 has an arc-shaped structure, and an installation tube 12 is provided at the end away from the first mounting bracket 11 for mounting the front wheel mounting bracket 3; an assembly piece 13 is provided on the inner arc side of the front support 1, and an assembly hole is provided on the assembly piece 13 for mounting the foot pedal mounting bracket. The assembly piece 13 is located near the front wheel mounting bracket 3.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A folding mechanism for connecting the front support and side tube of a wheelchair, comprising a front support (1), a side tube (2), and a seat plate, characterized in that, One end of the front support (1) is assembled with the front wheel (4), and the other end is provided with a first mounting set (11). One end of the side tube (2) is assembled with the rear wheel (5), and the other end is provided with a second assembly (21). The front support (1) and the side tube (2) are hinged together by a central shaft (6). The central shaft (6) can be rotatably inserted into the first assembly (11) and the second assembly (21) in sequence, and is then fastened to the connecting piece of the seat plate by a fastening screw (7) and a limiting rod (64).

2. The folding mechanism of claim 1, wherein, The central shaft (6) includes a bushing (61), and a threaded hole (62) is provided inside the bushing (61). The threaded hole (62) is located on the axis of the bushing (61). After the central shaft (6) is assembled with the first assembly (11) and the second assembly (21), it is threadedly fastened to the threaded hole (62) by a fastening screw and a connecting piece.

3. The wheelchair front support and side tube connection folding mechanism according to claim 2, wherein The bushing (61) is provided with a number of reinforcing ribs (63) around the threaded hole (62). One end of the reinforcing rib (63) extends out of the bushing (61) and is provided with a limiting rod (64), which is inserted into the positioning hole on the connecting piece of the seat plate.

4. The folding mechanism of claim 3, wherein, Six reinforcing ribs (63) are evenly arranged around the threaded hole (62). One end of each of the six reinforcing ribs (63) extends out of the bushing (61) and is provided with a limiting rod (64), which is inserted into the six positioning holes provided on the connecting piece of the seat plate.

5. The folding mechanism of claim 2, wherein, The bushing (61) has an edge (611) at one end and the other end without an edge (611) is fitted with the first fitting (11) and the second fitting (21). The outer diameters of the edge (611), the first fitting (11) and the second fitting (21) are the same.

6. The wheelchair front support and side tube connection folding mechanism according to claim 5, characterized in that, The bushing (61) has an end cap (65) integrally formed on one end of the edge (611), and the end cap (65) has several weight-reducing holes.

7. A wheelchair front support and side tube connection folding mechanism according to any one of claims 2-6, characterized in that, A washer (66) is provided between the first fitting (11) and the second fitting (21) on the bushing (61).

8. The folding mechanism of claim 1-6, wherein, The front support (1) is an arc-shaped structure, with an installation tube (12) provided at the end away from the first mounting bracket (11) for mounting the front wheel mounting bracket (3); an assembly piece (13) is provided on the inner arc side of the front support (1) for mounting the foot pedal mounting bracket, and the assembly piece (13) is located near the front wheel mounting bracket (3).

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