Injection molding carbon fiber wheelchair frame structure

Abstract

The utility model relates to the technical field of medical instruments, in particular to an injection molding carbon fiber wheelchair frame structure which comprises a folding handle and armrests. The lower part of the folding handle is connected with the frame, handrails are arranged on the frame, and a controller is arranged on the handrail on one side; a folding assembly and an auxiliary assembly are arranged on the frame; through topological design, the weight is reduced, the material consumption is reduced, meanwhile, the structural strength is enhanced, through structural optimization of key parts, compared with a circular tube type frame, the carbon fiber frame is higher in structural strength, lighter and more suitable for injection molding process production, the bearing capacity of the frame is further ensured through the high-strength characteristic of the carbon fiber material, and the actual use requirement is met.

Description

A type of injection-molded carbon fiber wheelchair frame structure Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an injection-molded carbon fiber wheelchair frame structure. Background Technology

[0002] Chinese patent document CN209422279U discloses a wheelchair, which proposes a seat portion including a seat frame and a backrest. The backrest is rotatably connected to one end of the seat frame and can be flipped to a use position at a predetermined angle to the seat frame and a folded position folded over the seat frame. The base includes a base body and wheels mounted on the base body, with the seat portion detachably mounted on top of the base body. By detachably connecting the seat portion to the base, the seat portion and base can be transported separately, making the transported components lightweight and reducing the difficulty of transportation. By folding the seat frame and backrest, the space occupied by the seat portion can be greatly reduced, thereby reducing the overall space occupied by the wheelchair.

[0003] The above-mentioned solutions and existing technologies: Most existing carbon fiber wheelchair frames adopt a cylindrical structure, which relies on lamination or mold-integrated molding process. The cylindrical structure is complex, and demolding of the cylindrical structure requires the use of a large number of detachable sliders (such as irregular curved surface sliders), which significantly increases the mold design cost and production labor cost, resulting in low production efficiency and failing to meet actual use needs.

[0004] Therefore, this utility model proposes an injection-molded carbon fiber wheelchair frame structure to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an injection-molded carbon fiber wheelchair frame structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an injection-molded carbon fiber wheelchair frame structure, comprising: a folding handle and armrests; the lower part of the folding handle is connected to the frame, the frame is provided with armrests, and a controller is provided on one side of the armrests;

[0007] The frame is equipped with folding components and auxiliary components.

[0008] Preferably, the folding assembly includes an armrest folding component and an armrest support tube; the armrest folding component is disposed below the armrest, and the armrest folding component is provided with an armrest support tube, and the other end of the armrest support tube is disposed on the vehicle frame.

[0009] Preferably, the frame is provided with a base portion, and the base portion is half-connected to the center fork fixing tube on the center fork fixing tube, and a center fork fixing plate is provided on one side of the center fork fixing tube, and the center fork fixing tube adopts an I-shaped structure with a circular groove.

[0010] Preferably, the middle fork fixing tube is half-connected to the seat fixing tube, and the seat fixing tube is connected to the bottom fixing tube through a connecting tube. The seat fixing tube is configured with an internal U-shaped structure and a bottom groove, and the bottom fixing tube adopts a circular groove structure.

[0011] Preferably, a center fork fixing tube fixing member is provided on one side of the frame, and an upper wing plate and a lower wing plate are provided on the frame, as well as a third wing plate.

[0012] Preferably, a footboard is installed on the underside of the frame via a folding footrest, and a front wheel is movably connected to the front of the frame, while a rear wheel is movably connected to the rear of the frame.

[0013] Preferably, the auxiliary component includes a connecting rod; the connecting rod is fixedly disposed on one side of the vehicle frame, and the connecting rod is inserted into the connecting block at the end of the battery box, and the connecting block and the vehicle frame are fixedly provided with limit holes at equal distances, and limit rods are adapted to be connected in the limit holes.

[0014] Preferably, the limiting rod is connected to the connecting piece, and the connecting piece is connected to the washer through a connecting spring. The end of the washer is provided with a fixing nut, and the fixing nut is threadedly connected to the connecting rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By reducing weight and material usage through topology design, the structural strength is enhanced. Through structural optimization of key parts, it is stronger, lighter and more suitable for injection molding compared to round tube frames. The high strength of carbon fiber material further ensures the load-bearing capacity of the frame and meets actual use requirements. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 is an enlarged schematic diagram of the structure at point A in Figure 1 of this utility model;

[0019] Figure 3 is a schematic diagram of the unfolded frame of this utility model;

[0020] Figure 4 is a cross-sectional view of the I-shaped structure of this utility model;

[0021] Figure 5 is a schematic diagram of the fork fixing tube structure of this utility model.

[0022] In the diagram: 1. Folding handle; 2. Armrest; 3. Armrest folding piece; 4. Armrest support tube; 5. Fork fixing tube; 6. Fork fixing plate; 7. Frame; 8. Folding crossbody; 9. Pedal; 10. Front wheel; 11. Rear wheel; 12. Controller; 13. Wheelchair battery box; 5-1. Fork fixing tube half buckle; 5-2. Seat fixing tube; 5-3. Bottom fixing tube; 5-4. Connecting rod; 7-1. Base part; 7-2. Fork fixing tube fixing piece; 7-5. Upper wing plate; 7-10. Third wing plate; 7-11. Lower wing plate; 7-12. Connecting block; 13-1. Limiting hole; 13-2. Limiting rod; 13-3. Connecting piece; 13-4. Connecting spring; 13-5. Washer; 13-6. Fixing nut; 13-7. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Please refer to Figures 1 to 5 for an injection-molded carbon fiber wheelchair frame structure. This utility model provides a technical solution:

[0025] Example 1: 1. An injection-molded carbon fiber wheelchair frame structure, comprising: a folding handle 1 and an armrest 2; the lower part of the folding handle 1 is connected to the frame 7, the frame 7 is provided with the armrest 2, and a controller 12 is provided on one side of the armrest 2, the controller 12 can control the movement of the front wheel 10 and the rear wheel 11 on the frame 7; the frame 7 is provided with a folding component and an auxiliary component.

[0026] Example 2: Based on Example 1, the folding assembly includes a handlebar folding component 3 and a handlebar support tube 4; the handlebar folding component 3 is located below the handlebar 2, and the handlebar support tube 4 is provided on the handlebar folding component 3, and the other end of the handlebar support tube 4 is provided on the frame 7; the frame 7 is provided with a base portion 7-2, and the base portion 7-2 is connected to the fork fixing tube half buckle 5-1 on the fork fixing tube 5, and a fork fixing piece 6 is provided on one side of the fork fixing tube 5, and the fork fixing tube 5 adopts an I-shaped structure with a circular groove.

[0027] The middle fork fixed tube half buckle 5-1 is connected to the seat cushion fixed tube 5-2, and the seat cushion fixed tube 5-2 is connected to the bottom fixed tube 5-4 through the provided connecting tube 5-3. The inside of the seat cushion fixed tube 5-2 is made into a U-shaped structure with a groove at the bottom. When in use, the cloth seat cushion can be passed through the slot hole, and a round tube can be passed through the hole on the seat cushion for fixation. The holes of the cloth seat cushion are integrally formed without secondary fixation, reducing the risk of falling off when the cloth seat cushion is opened. The bottom fixed tube 5-4 also adopts a circular groove structure. Through such a series of designs, the negative draft modulus of the frame and the middle fork fixed tube is reduced, making its shape more suitable for the injection mold; on one side of the frame 7, there is a middle fork fixed tube fixing part 7-5, and on the frame 7, there are upper wing plates 7-10 and lower wing plates 7-12, and a third wing plate 7-11 is provided; below the frame 7, a pedal 9 is installed through the provided folding crossbar 8, and in front of the frame 7, a front wheel 10 is movably connected, and behind the frame 7, a rear wheel 11 is movably connected.

[0028] The auxiliary component includes a connecting rod 7-1; the connecting rod 7-1 is fixedly arranged on one side of the frame 7, and the provided connecting rod 7-1 is inserted into a connecting block 13-1 at the end of the battery box 13. The connecting block 13-1 and the frame 7 are equidistantly fixedly provided with limiting holes 13-2, and a limiting rod 13-3 is adaptively connected in the limiting holes 13-2; the limiting rod 13-3 is connected to a connecting piece 13-4, and the connecting piece 13-4 is connected to a gasket 13-6 through a provided connecting spring 13-5. The end of the gasket 13-6 is provided with a fixing nut 13-7, and the fixing nut 13-7 is adaptively threadedly connected to the connecting rod 7-1. The connecting block 13-1 on the battery box 13 is connected and fixed to the frame 7 through the detachable fixing nut 13-7, facilitating installation and disassembly.

[0029] When in use, the upper wing plate 7-10 and the lower wing plate 7-12 are rounded, and the third wing plate 7-11 is inserted between the two wing plates to form a structure similar to the character "king", adding a rounded corner design to make its wall thickness uniform and have a high bending stiffness. Applying this structure to the frame is also more beautiful and suitable for the injection molding process; after unfolding, the middle fork fixed tube half buckle 5-1 is buckled into the base 7-2 on the frame and the middle fork connecting piece 6 to form a triangular fixed structure, enhancing the support stability. The middle fork fixed tube support tube adopts a structure of工字加圆形槽 (I-shaped plus circular groove). The inside of the seat cushion fixed tube 5-2 is made into a U-shaped structure with a groove at the bottom. When in use, the cloth seat cushion can be passed through the slot hole, and a round tube can be passed through the hole on the seat cushion for fixation. The holes of the cloth seat cushion are integrally formed without secondary fixation, reducing the risk of falling off when the cloth seat cushion is opened. The bottom fixed tube 5-4 also adopts a circular groove structure. Through such a series of designs, the negative draft modulus of the frame and the middle fork fixed tube is reduced, making its shape more suitable for the injection mold.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection-molded carbon fiber wheelchair frame structure, comprising: Folding handle (1) and armrest (2); the lower part of the folding handle (1) is connected to the frame (7), the frame (7) is provided with armrest (2), and a controller (12) is provided on one side of the armrest (2); characterized in that: the frame (7) is provided with a folding assembly and an auxiliary assembly; the folding assembly includes an armrest folding piece (3) and an armrest support tube (4); the armrest folding piece (3) is located below the armrest (2), and the armrest folding piece (3) is provided with an armrest support tube (4), and the other end of the armrest support tube (4) is provided on the frame (7); the frame (7) is provided with a base part (7-2), and the base part (7- 2) Connected to the fork fixing tube half buckle (5-1) on the fork fixing tube (5), and a fork fixing plate (6) is provided on one side of the fork fixing tube (5), and the fork fixing tube (5) adopts an I-shaped structure with a circular groove; the auxiliary component includes a connecting rod (7-1); the connecting rod (7-1) is fixedly set on one side of the frame (7), and the connecting rod (7-1) is inserted into the connecting block (13-1) at the end of the battery box (13), and the connecting block (13-1) and the frame (7) are fixedly provided with limit holes (13-2) at equal distances, and the limit holes (13-2) are fitted with limit rods (13-3).

2. The injection-molded carbon fiber wheelchair frame structure according to claim 1, characterized in that: The middle fork fixing tube half buckle (5-1) is connected to the seat fixing tube (5-2), and the seat fixing tube (5-2) is connected to the bottom fixing tube (5-4) through the connecting tube (5-3). The seat fixing tube (5-2) is designed with an internal U-shaped structure and a bottom groove, and the bottom fixing tube (5-4) adopts a circular groove structure.

3. The injection-molded carbon fiber wheelchair frame structure according to claim 2, characterized in that: The frame (7) is provided with a center fork fixing tube fixing member (7-5) on one side, and the frame (7) is provided with an upper wing plate (7-10) and a lower wing plate (7-12), and a third wing plate (7-11).

4. The injection-molded carbon fiber wheelchair frame structure according to claim 3, characterized in that: The frame (7) is equipped with a pedal (9) via a folding foot (8) at the bottom, and a front wheel (10) is movably connected to the front of the frame (7), and a rear wheel (11) is movably connected to the rear of the frame (7).

5. The injection-molded carbon fiber wheelchair frame structure according to claim 4, characterized in that: The limiting rod (13-3) is connected to the connecting piece (13-4), and the connecting piece (13-4) is connected to the washer (13-6) through the connecting spring (13-5). The end of the washer (13-6) is provided with a fixing nut (13-7), and the fixing nut (13-7) is threadedly connected to the connecting rod (7-1).

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