High-strength frame structure for wheelchair

Abstract

The utility model relates to a high-strength frame structure for a wheelchair, which comprises a frame, the frame comprises an upper beam rod and a lower beam rod, a front support rod and a rear support rod are respectively connected between the front end and the rear end of the upper beam rod and the front end and the rear end of the lower beam rod, and the upper beam rod, the lower beam rod, the front support rod and the rear support rod are integrally made of first materials and form a frame-shaped main body. Compared with the prior art, the frame of the wheelchair is integrally formed by adopting a carbon fiber material, the traditional welding process is abandoned, the weight is reduced while the strength of the frame is ensured, the frame is stable in structure, and the service life of the wheelchair is prolonged. The overall structural strength and stress strength are good, durability is improved, attractiveness and simplicity are achieved, the metal lining is integrally connected into the frame, and the stability of lining connection can be improved.

Description

Technical Field

[0001] The utility model relates to the field of folding wheelchairs, in particular to a high-strength frame structure for wheelchairs. Background Art

[0002] The current folding wheelchair structure is a lightweight wheelchair frame disclosed in Chinese patent document CN201710205956.9, which mainly includes a rear push handle tube, a backrest tube, a lower cross tube, a vertical tube, a front leg tube, a reinforcement tube, a seat tube and an armrest tube. The structure is characterized in that the component tubes are connected and fixed to each other by means of tight fitting, welding or screws. The prior art requires processing of tubes of various lengths and shapes in the early stage, and after the processing is completed, the tubes of different lengths need to be welded. The entire production process is laborious and the processing efficiency is low. Moreover, after processing, the welding positions between the tubes are not only unsightly, but also under force, the stress is concentrated at the welding positions, which are prone to cracking or disconnection. The overall strength is low and the stability is not ideal. In addition, the frame needs to be connected to other components of the wheelchair when assembling the wheelchair. Therefore, independent connecting parts need to be fixed to the frame by fixing clamps or fastening units. The connection strength of the connecting parts is poor, and they are prone to loosening and abnormal noises after long-term use. Therefore, the applicant provides a new solution to the above-mentioned prior art problems by improving and perfecting the prior art for consumers to choose and use. Summary of the invention

[0003] The utility model aims to provide a high-strength frame structure for a wheelchair which has a simple and reasonable structure, is easy to install and has a stable structure.

[0004] A high-strength frame structure for a wheelchair includes a frame, wherein the frame includes an upper beam and a lower beam, a front support rod and a rear support rod are respectively connected between the front and rear ends of the upper beam and the lower beam, the upper beam, the lower beam, the front support rod and the rear support rod are integrally made of a first material and constitute a frame-shaped body, and at least a portion of the upper beam, the lower beam, the front support rod and the rear support rod are integrally connected with a bushing made of a second material.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, at least one circle of inner groove is formed in the middle portion of the outer wall of the bushing.

[0007] As a further solution, the rear ends of the upper beam and the lower beam are respectively connected to the upper and lower parts of the middle part of the rear support rod, the upper part of the rear support rod is connected to a first bushing for hingedly connecting one end of the handrail frame, and the rear end of the upper beam is connected to a second bushing for hingedly connecting the other end of the handrail frame.

[0008] As a further solution, a connecting beam is integrally extended outward from the junction between the lower beam and the front support rod, a connecting sleeve is provided at the outer end of the connecting beam, and a third bushing for rotationally connecting to the front guide wheel is integrally nested in the connecting sleeve.

[0009] As a further solution, two connecting ears are integrally extended from the inner side of the lower beam, the two connecting ears are arranged along the front and rear of the lower beam, and a fourth bushing for hingedly connecting the lower end of the folding frame is connected inside the connecting ears.

[0010] As a further solution, the frame also includes a bottom support beam, the rear end of the bottom support beam is integrally connected to the lower part of the rear support rod, the front end of the bottom support beam is a "Y"-shaped structure, and the two ends of the "Y"-shaped structure are integrally connected to the rear end of the lower beam rod, and the bottom support beam, the rear end of the rear support rod and the lower part of the rear support rod constitute a moving wheel bracket for connecting the moving wheel.

[0011] As a further solution, a first fan-shaped widened connection portion is provided at the junction of the upper beam and the rear support rod; a second fan-shaped widened connection portion is provided at the junction of the lower beam and the rear support rod; a third fan-shaped widened connection portion is provided at the junction of the rear end of the bottom support beam and the rear support rod; and the junction of the upper beam and the front support rod is an arc-shaped structure.

[0012] As a further solution, two supporting ears for supporting the upper end of the folding frame are integrally extended from the inner side of the lower beam, the two supporting ears are arranged along the front and rear of the upper beam, and a connecting head is integrally extended between the two supporting ears, and the middle part of the folding frame is hinged to the connecting rotation.

[0013] As a further solution, the first material includes carbon fiber and plastic, and the frame is made of carbon fiber material or plastic in an integral manner to present a hollow flat frame structure; the second material includes metal.

[0014] As a further solution, it also includes wheelchair components, which include at least a folding frame, an armrest frame and a front guide wheel. The folding frame, the armrest frame and the front guide wheel are fastened or integrally connected with a threaded shaft, the threaded shaft is inserted into a bushing and fastened in the threaded shaft by a screw or a nut, so that the folding frame, the armrest frame and the front guide wheel are movably hinged to the frame.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model discloses a high-strength wheelchair frame structure. Compared with the prior art, the frame of this wheelchair is integrally formed of carbon fiber material, abandoning the traditional welding process. While ensuring the strength of the frame, the weight is reduced, the frame structure is stable, the overall structural strength and stress strength are good, the durability is improved, the appearance is simple, and the metal bushing is integrally connected to the frame, which can improve the stability of the bushing connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the frame structure of the utility model.

[0018] Figure 2 This is another perspective structural diagram of the frame of the utility model.

[0019] Figure 3 This is a schematic diagram of the bushing structure in the utility model.

[0020] Figure 4 It is a schematic diagram of the structure of a wheelchair in the utility model.

[0021] Figure 5 It is a schematic diagram of the connection structure between the handrail frame and the vehicle frame in the utility model.

[0022] Figure 6 It is a schematic diagram of the connection structure between the forepart and the frame in the utility model.

[0023] Figure 7 It is a schematic diagram of the connection structure between the folding frame and the vehicle frame in the utility model. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figures 1 to 3 As shown, a high-strength frame structure for a wheelchair comprises a frame 1, wherein the frame 1 comprises an upper beam 2 and a lower beam 3, wherein a front support rod 4 and a rear support rod 5 are respectively connected between the front and rear ends of the upper beam 2 and the lower beam 3, wherein the upper beam 2, the lower beam 3, the front support rod 4 and the rear support rod 5 are integrally made of a first material and constitute a frame-shaped body, and at least a portion of the upper beam 2, the lower beam 3, the front support rod 4 and the rear support rod 5 are integrally connected with a bushing 6 made of a second material;

[0026] Compared with the existing technology, the frame of this wheelchair is made of carbon fiber material in one piece, abandoning the traditional welding process. It reduces the weight while ensuring the strength of the frame, making the frame structure stable, with good overall structural strength and force strength, improved durability, and beautiful and simple appearance. The metal bushing is integrated into the frame, which can improve the stability of the bushing connection.

[0027] The middle part of the outer wall of the bushing 6 is provided with at least one circle of inner groove 601; when the frame is processed, the inner groove 601 can be completely injection molded into the frame, and the inner groove 601 ensures that the first material can enter the bushing 6 to fasten it in multiple layers, making the bushing 6 more firmly connected, and the bushing 6 is also prevented from being loosened due to the axial force pulling the bushing 6 during use, thereby ensuring that the bushing 6 is not loose.

[0028] In this embodiment, the rear ends of the upper beam 2 and the lower beam 3 are respectively connected to the upper and lower parts of the middle part of the rear support rod 5, the upper part 51 of the rear support rod 5 is connected to a first bushing 6A for hingedly connecting one end of the handrail frame 13, and the rear end of the upper beam 2 is connected to a second bushing 6B for hingedly connecting the other end of the handrail frame 13.

[0029] In this embodiment, a connecting beam 7 is integrally extended outward from the joint between the lower beam 3 and the front support rod 4. A connecting sleeve 71 is provided at the outer end of the connecting beam 7. A third bushing 6C for rotationally connecting the front guide wheel 14 is integrally nested in the connecting sleeve 71.

[0030] In this embodiment, two connecting ears 8 are integrally extended from the inner side of the lower beam 3 , the two connecting ears 8 are arranged along the front and rear of the lower beam 3 , and a fourth bushing 6D for hingedly connecting the lower end of the folding frame 12 is connected inside the connecting ears 8 .

[0031] The frame 1 also includes a bottom support beam 9, a rear end of which is integrally connected to the lower portion 52 of the rear support rod 5, a front end of which is in a "Y"-shaped structure, and both ends of the "Y"-shaped structure are integrally connected to the rear end of the lower beam 3, and the bottom support beam 9, the rear end of the rear support rod 5 and the lower portion 52 of the rear support rod 5 constitute a moving wheel bracket for connecting a moving wheel; the bottom support beam 9 of this structure can improve the connection strength with the lower beam 3, so that the frame has better integrity and a firm connection.

[0032] The joint of the upper beam 2 and the rear support rod 5 is provided with a first fan-shaped widened connection portion 21; the joint of the lower beam 3 and the rear support rod 5 is provided with a second fan-shaped widened connection portion 31; the joint of the rear end of the bottom support beam 9 and the rear support rod 5 is provided with a third fan-shaped widened connection portion 91; the joint of the upper beam 2 and the front support rod 4 is an arc-shaped structure; the strength of the joint position of the upper beam 2, the lower beam 3 and the bottom support beam 9 and the rear support rod 5 is enhanced by the widened connection portions, and it is not easy to crack or break after being subjected to stress.

[0033] Two supporting ears 10 for supporting the upper end of the folding frame 12 are integrally extended from the inner side of the lower beam 3. The two supporting ears 10 are arranged along the front and rear of the upper beam 2, and a connecting head 11 is integrally extended between the two supporting ears 10. The middle part of the folding frame 12 is hinged with the connecting head; the supporting ears are also made integrally with the frame, eliminating the assembly of connecting parts and improving production efficiency.

[0034] In this embodiment, the first material is preferably carbon fiber, and the frame 1 is made of carbon fiber material in one piece to present a hollow flat frame structure; the second material is preferably metal materials such as stainless steel and iron.

[0035] like Figure 4 As shown, the wheelchair also includes components, and the wheelchair components at least include a folding frame 12, an armrest frame 13 and a front guide wheel 14;

[0036] like Figure 5 As shown, the handrail frame 13 includes a handrail frame body 131 and a handrail pull rod 132 which are hinged to each other, and the ends of the handrail frame body 131 and the handrail pull rod 132 are integrally connected with a threaded shaft, and the threaded shaft is an internal threaded hole shaft 15. The internal threaded hole shaft 15 of the handrail frame body 131 is inserted in the first bushing 6A, and the internal threaded hole shaft 15 of the handrail pull rod 132 is inserted in the second bushing 6B, and is fastened to each internal threaded hole shaft 15 by a screw 171, so that the handrail frame 13 is movably hinged to the frame 1.

[0037] like Figure 6 As shown, the front guide wheel 14 includes a bracket 141 rotatably connected to the front guide wheel, and a threaded shaft is fastened to the bracket 141, and the threaded shaft is an externally threaded wheel axle 16. The externally threaded wheel axle 16 is inserted into the third bushing 6C and is fastened to the externally threaded wheel axle 16 by a nut 172, so that the front guide wheel 14 is movably connected to the frame 1.

[0038] like Figure 7 As shown, the folding frame 12 is connected between a pair of symmetrically arranged vehicle frames 1, including two groups of I-shaped folding frames 121 and connecting rods 122. The middle of the two groups of I-shaped folding frames 121 are mutually rotatably hinged, and the lower ends of the two groups of I-shaped folding frames 121 are integrally connected with threaded shafts, which are internal threaded hole shafts 15. The internal threaded hole shafts 15 of the I-shaped folding frames 121 are inserted into the fourth bushing 6D and fastened in the internal threaded hole shafts 15 by screws 171, so that the lower end of the folding frame 12 is movably hinged with the vehicle frame 1;

[0039] One end of the connecting rod 122 is hinged to the upper part of the I-shaped folding frame 121, and the other end is hinged to the connecting head 11. When the folding frame is opened, the upper end of the I-shaped folding frame 121 is placed on the supporting ear 10; a flexible cushion 123 is also connected between the upper ends of the two groups of I-shaped folding frames 121.

[0040] like Figure 4 As shown, the wheelchair components also include:

[0041] A pedal assembly 18, wherein the pedal assembly 18 is detachably connected to the front support rod 4 of the frame;

[0042] An electric drive device 19, wherein the electric drive device 19 is fastened to the inner side of the moving wheel bracket 141, and a moving wheel 20 is fixedly connected to the output shaft of the electric drive device 19;

[0043] The handle frame 24 is detachably connected to the upper portion 51 of the rear support rod 5 . A flexible backrest pad 22 is also connected between the upper portions 51 of two adjacent rear support rods 5 and between two adjacent handle frames 24 .

[0044] The auxiliary wheel 23 is rotatably connected to the bottom end of the rear support rod 5 .

[0045] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-strength frame structure for a wheelchair, comprising a frame (1), characterized in that: The vehicle frame (1) comprises an upper beam (2) and a lower beam (3), a front support rod (4) and a rear support rod (5) are respectively connected between the front and rear ends of the upper beam (2) and the lower beam (3), the upper beam (2), the lower beam (3), the front support rod (4) and the rear support rod (5) are integrally made of a first material and form a frame-shaped body, and at least a portion of the upper beam (2), the lower beam (3), the front support rod (4) and the rear support rod (5) are integrally connected with a bushing (6) made of a second material.

2. The high-strength frame structure for a wheelchair according to claim 1, characterized in that The middle portion of the outer wall of the bushing (6) is provided with at least one circle of inner groove (601).

3. The high-strength frame structure for a wheelchair according to claim 1, characterized in that The rear ends of the upper beam (2) and the lower beam (3) are respectively connected to the upper and lower parts of the middle part of the rear support rod (5); the upper part of the rear support rod (5) is connected to a first bushing (6A) for hingedly connecting one end of the handrail frame (13); and the rear end of the upper beam (2) is connected to a second bushing (6B) for hingedly connecting the other end of the handrail frame (13).

4. The high-strength frame structure for a wheelchair according to claim 1, characterized in that A connecting beam (7) is integrally extended outward from the joint between the lower beam (3) and the front support rod (4), a connecting sleeve (71) is provided at the outer end of the connecting beam (7), and a third bushing (6C) for rotatably connecting to the front guide wheel (14) is integrally embedded in the connecting sleeve (71).

5. The high-strength frame structure for a wheelchair according to claim 1, characterized in that Two connecting ears (8) are integrally extended from the inner side of the lower beam (3), the two connecting ears (8) are arranged along the front and rear of the lower beam (3), and a fourth bushing (6D) for hingedly connecting the lower end of the folding frame (12) is connected inside the connecting ears (8).

6. The high-strength frame structure for a wheelchair according to claim 3, characterized in that The frame (1) further comprises a bottom support beam (9), the rear end of the bottom support beam (9) being integrally connected to the lower portion of the rear support rod (5), the front end of the bottom support beam (9) being in a "Y"-shaped structure, the two ends of the "Y"-shaped structure being integrally connected to the rear end of the lower beam rod (3), the bottom support beam (9), the rear end of the rear support rod (5) and the lower portion of the rear support rod (5) forming a moving wheel bracket for connecting a moving wheel.

7. The high-strength frame structure for a wheelchair according to claim 6, characterized in that A first fan-shaped widened connection portion (21) is provided at the junction of the upper beam (2) and the rear support rod (5); a second fan-shaped widened connection portion (31) is provided at the junction of the lower beam (3) and the rear support rod (5); a third fan-shaped widened connection portion (91) is provided at the junction of the rear end of the bottom support beam (9) and the rear support rod (5); and a junction of the upper beam (2) and the front support rod (4) is an arc-shaped structure.

8. The high-strength frame structure for a wheelchair according to claim 1, characterized in that Two support ears (10) for supporting the upper end of the folding frame (12) are integrally extended from the inner side of the lower beam (3); the two support ears (10) are arranged along the front and rear of the upper beam (2); and a connecting head (11) is integrally extended between the two support ears (10); the middle part of the folding frame (12) is rotatably hinged to the connecting head.

9. The high-strength frame structure for a wheelchair according to claim 1, characterized in that The first material includes carbon fiber and plastic, and the frame (1) is made of carbon fiber material or plastic in one piece to present a hollow flat frame structure; the second material includes metal.

10. The high-strength frame structure for a wheelchair according to claim 1, characterized in that : Also included are wheelchair components, the wheelchair components at least comprising a folding frame (12), an armrest frame (13) and a front guide wheel (14), the folding frame (12), the armrest frame (13) and the front guide wheel (14) being fastened or integrally connected with a threaded shaft, the threaded shaft being inserted into a bushing (6) and being fastened to the threaded shaft by a screw or a nut, so that the folding frame (12), the armrest frame (13) and the front guide wheel (14) are movably hinged to the frame (1).

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