Wheelchair shock absorption assembly and electric wheelchair

Abstract

The utility model provides a wheel chair shock-proof assembly which comprises a front wheel underframe used for installing front wheels of a vehicle and a cushion frame used for supporting a cushion plate, the front wheel underframe and the cushion frame are rotationally connected with one end adjacent to a chair back of the wheel chair, and the top of the front wheel underframe is connected with a shock absorber assembly at one end where the front wheels are installed. Elastic damping is carried out between a front wheel and a cushion of the wheelchair through the shock absorber assembly, the front wheel is installed through the front wheel bottom frame, the cushion frame used for supporting a cushion plate is arranged, and the front wheel bottom frame and the cushion frame are rotationally connected on the sides, close to a chair back of the wheelchair, of the front wheel bottom frame and the cushion frame, so that a certain degree of freedom is provided; and the ends, far away from the rotary connecting position, of the two levers are connected with the shock absorber assembly to form the two levers which are elastically connected through the shock absorber, so that effective elastic support is provided below a seat cushion of the wheelchair, and a good shock absorption and support effect is provided through the shock absorber assembly. The utility model further provides an electric wheelchair.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a wheelchair shock-absorbing assembly and an electric wheelchair. Background Art

[0002] With the continuous increase in the number of elderly people in China and the increasing demand for diversified travel by special disabled groups, electric wheelchairs have gradually become an indispensable means of transportation in the market. Electric wheelchairs are a type of mechanical equipment equipped with an electric drive device based on a traditional hand-cranked wheelchair. Most electric wheelchairs are mainly composed of a wheelchair frame, a drive motor, a controller, and a battery. Unlike traditional wheelchairs, electric wheelchairs have a special interactive structure that allows the wheelchair to move through manual or other forms of instructions, and can complete the action alone without relying on other external assistance.

[0003] The wheelchair bracket usually consists of a side frame, a bottom bracket, a seat bracket, a wheel bracket, etc. The specific bracket distribution structure varies depending on the technical requirements of the wheelchair's load-bearing requirements, folding and storage requirements, etc. However, there are also some problems in the use of general wheelchairs or electric wheelchairs, which are specifically manifested in:

[0004] In order to ensure the firmness and rigidity of the wheelchair, the wheelchair usually feels harder when riding, especially when the wheelchair passes through uneven ground, which will cause obvious bumps. To solve this problem, the general design usually optimizes the material of the seat cushion and uses a softer and more elastic seat cushion to improve the riding comfort. However, this design itself has obvious limitations. When riding, the user's buttocks and back are prone to obvious stuffiness. After long-term use, the elasticity of the seat cushion will gradually lose, and the ride will feel harder and harder.

[0005] In summary, existing wheelchairs or electric wheelchairs have technical problems such as strong stiffness when riding and poor riding experience. Utility Model Content

[0006] The technical problem to be solved by the utility model is that the existing wheelchairs or electric wheelchairs have a strong stiff feeling when riding and a poor riding experience.

[0007] In order to solve the above problems, the utility model provides a wheelchair shock absorber assembly, including a front wheel base frame for mounting the front wheel of a vehicle and a seat cushion frame for supporting a seat cushion plate, the front wheel base frame and the seat cushion frame are rotatably connected to each other at one end adjacent to the backrest of the wheelchair, the top of the front wheel base frame is connected to a shock absorber assembly at the end where the front wheel is mounted, the other end of the shock absorber assembly is connected to the seat cushion frame, and elastic shock absorption is performed between the front wheel of the wheelchair and the seat cushion through the shock absorber assembly.

[0008] The wheelchair shock-absorbing assembly provided by the utility model first optimizes the overall design of the frame, installs two sets of vehicle front wheels through an integrated front wheel chassis, and provides a seat cushion frame for supporting the seat cushion plate, the two are rotatably connected to each other on the side close to the wheelchair backrest, so that the two can rotate with each other within a certain range, providing a certain degree of freedom, and connect the shock absorber assembly at one end of the two away from the rotational connection position to form two levers elastically connected by the shock absorber, thereby providing effective elastic support under the wheelchair seat cushion, and providing good shock-absorbing support effect through the shock absorber assembly, which effectively solves the technical problems of strong stiffness and poor riding experience of existing wheelchairs or electric wheelchairs.

[0009] As a preferred solution, the front wheel chassis is fixedly connected with a wheel frame cross bar between the left and right frame rods on which the front wheels are mounted, and the end of the shock absorber assembly is connected to the wheel frame cross bar. This design optimizes the structural design of the front wheel chassis, and an additional lateral support is provided between the left and right frame rods on which the front wheels are mounted, and the force between the wheel and the seat cushion is transmitted through this structure, thereby optimizing the shock absorption effect of the shock absorber assembly.

[0010] As a preferred solution, the seat frame is provided with a seat cross bar near the end thereof facing the front wheel, and the two ends of the shock absorber assembly are connected to the wheel frame cross bar and the seat cross bar respectively. This design optimizes the structural design of the seat frame, and its principle is similar to the above design, both of which transmit force through the cross bar, thus optimizing the shock absorber support effect.

[0011] As a preferred solution, the cushion crossbar is an elastic strip structure, and its two ends are integrally fixedly connected to the cushion frame. This design optimizes the structure of the cushion crossbar, and the elastic strip structure is adopted, so that the support itself also has a certain elasticity. The elastic support effect provided by the shock absorber is magnified through the elastic strip structure, further improving the riding experience of the wheelchair.

[0012] As a preferred solution, two groups of parallel shock absorber assemblies are connected between the wheel frame cross bar and the seat cushion cross bar, and the shock absorber assemblies are respectively connected to the areas near the ends of the wheel frame cross bar and the seat cushion cross bar. This design further optimizes the setting of the shock absorber, and adopts two groups of parallel shock absorbers for support, thereby improving the stability of the support, avoiding the occurrence of unbalanced force and the flipping of the seat cushion support, and also improving the riding safety and durability of the wheelchair.

[0013] As a preferred solution, the shock absorber group includes two mutually sleeved connecting rods, the ends of the two connecting rods are provided with support plates, and a compression spring is provided between the side support plates between the two connecting rods, and the compression spring provides elastic support force. This design provides a preferred shock absorber assembly structural design, using two mutually sleeved connecting rods and sleeve compression springs on the outer edges of the two, and the compression springs push the two rods against each other in opposite directions to provide elastic support elastic force, with a simple structure and stable support.

[0014] As a preferred solution, a raised hinged platform is provided at the position where the wheel frame cross bar and the seat cushion cross bar are connected to the shock absorber assembly, and the hinged platform is rotatably connected to the end of the shock absorber assembly. This design provides a preferred connection method for the wheel frame cross bar and the seat cushion cross bar to the shock absorber assembly, especially the connecting rod ends at both ends thereof, and the hinged platform is used for articulation to meet the rotation margin required for the support position, ensure the mobility of the mechanism and avoid interference with the position of the cross bar itself.

[0015] The utility model also provides an electric wheelchair, comprising a wheelchair frame, a power device and a wheel assembly device, wherein the wheelchair frame is provided with a wheelchair shock-absorbing assembly as described in any of the above items. Since the wheelchair shock-absorbing assembly described above has the above beneficial effects, an electric wheelchair equipped with the wheelchair shock-absorbing assembly should also have corresponding beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a wheelchair shock-absorbing assembly provided by the utility model;

[0017] Figure 2 for Figure 1 The enlarged structural diagram of the shock-absorbing assembly of the wheelchair;

[0018] Figure 3 for Figure 1 Schematic diagram of the structure of the shock absorber component of the wheelchair shock absorber assembly.

[0019] in, Figure 1-Figure 3 middle:

[0020] 1. Seat frame; 2. Front wheel frame; 3. Seat cross bar; 4. Wheel frame cross bar; 5. Shock absorber assembly; 5-1. Connecting rod; 5-2. Compression spring; 5-3. Support plate; 6. Articulated table. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] refer to Figure 1-Figure 3 , Figure 1 A structural schematic diagram of a wheelchair shock-absorbing assembly provided by the utility model; Figure 2 for Figure 1 The enlarged structural diagram of the shock-absorbing assembly of the wheelchair; Figure 3 for Figure 1 Schematic diagram of the structure of the shock absorber component of the wheelchair shock absorber assembly.

[0023] The wheelchair shock absorption assembly provided in this embodiment includes a front wheel chassis 2 for mounting the front wheel of the vehicle and a seat cushion frame 1 for supporting the seat cushion plate. The front wheel chassis 2 and the seat cushion frame 1 are rotatably connected to each other at one end adjacent to the backrest of the wheelchair. The top of the front wheel chassis 2 is connected to a shock absorber assembly 5 at the end where the front wheel is mounted. The other end of the shock absorber assembly 5 is connected to the seat cushion frame. Elastic shock absorption is performed between the front wheel of the wheelchair and the seat cushion through the shock absorber assembly 5. This wheelchair shock absorber assembly first optimizes the overall design of the frame. It installs two sets of vehicle front wheels through an integrated front wheel base 2, and provides a seat cushion frame 1 for supporting the seat cushion plate. The two are rotatably connected to each other on the side close to the wheelchair backrest, so that the two can rotate with each other within a certain range, providing a certain degree of freedom, and a shock absorber component 5 is connected to the end of the two away from the rotational connection position to form two levers elastically connected by the shock absorber, thereby providing effective elastic support under the wheelchair seat cushion. The good shock-absorbing support effect provided by the shock absorber component 5 effectively solves the technical problems of strong stiffness and poor riding experience of existing wheelchairs or electric wheelchairs.

[0024] In the technical solution provided in this embodiment, the front wheel chassis 2 is fixedly connected with a wheel frame cross bar 4 between the left and right frame bars on which the front wheels are respectively mounted, and the end of the shock absorber assembly 5 is connected to the wheel frame cross bar 4. This design optimizes the structural design of the front wheel chassis 2, and an additional lateral support is provided between the left and right frame bars on which the front wheels are respectively mounted, and the force between the wheel and the seat cushion is transmitted through this structure, thereby optimizing the shock absorption effect of the shock absorber assembly 5.

[0025] In the technical solution provided in this embodiment, a seat cross bar is provided near the end of the seat frame facing the front wheel, and the two ends of the shock absorber assembly 5 are respectively connected to the wheel frame cross bar 4 and the seat cross bar. This design optimizes the structural design of the seat frame 1, and its principle is similar to the above design, both of which transmit force through the cross bar, thereby optimizing the shock absorber support effect.

[0026] In the technical solution provided in this embodiment, the cushion crossbar 3 is an elastic strip structure, and its two ends are integrally fixedly connected to the cushion frame. This design optimizes the structure of the cushion crossbar, which adopts an elastic strip structure, so that the support itself also has a certain elasticity. The elastic strip structure amplifies the elastic support effect provided by the shock absorber, further improving the riding experience of the wheelchair.

[0027] In the technical solution provided in this embodiment, two sets of parallel shock absorber assemblies 5 are connected between the wheel frame cross bar 4 and the cushion cross bar, and the shock absorber assemblies 5 are respectively connected to the wheel frame cross bar 4 and the area near the end of the cushion cross bar. This design further optimizes the setting of the shock absorber, and adopts two sets of parallel shock absorbers for support, thereby improving the stability of the support, avoiding the occurrence of unbalanced force and the flipping of the cushion support, and also improving the riding safety and durability of the wheelchair.

[0028] In the technical solution provided in this embodiment, the shock absorber group includes two mutually sleeved connecting rods 5-1, and the ends of the two connecting rods 5-1 are provided with support plates 5-3. A compression spring 5-2 is provided between the side support plates 5-3 between the two connecting rods 5-1, and an elastic support force is provided by the compression spring 5-2. This design provides a preferred structural design of the shock absorber assembly 5, which adopts two mutually sleeved connecting rods 5-1 and sleeves a compression spring 5-2 on the outer edges of the two. The compression spring 5-2 pushes the two in opposite directions to provide elastic support elastic force, and the structure is simple and the support is stable. In addition, the shock absorber assembly 5 can also adopt a design such as a hydraulic rod support, as long as it can meet the elastic support requirements. This embodiment only provides a low-cost optional design.

[0029] In the technical solution provided in this embodiment, a raised hinged platform 6 is provided at the position where the wheel frame cross bar 4 and the cushion cross bar are connected to the shock absorber assembly 5, and the hinged platform 6 is rotatably connected to the end of the shock absorber assembly 5. This design provides a preferred connection method for the wheel frame cross bar 4 and the cushion cross bar and the shock absorber assembly 5, especially the ends of the connecting rod 5-1 at both ends thereof, and the hinged platform 6 is used for articulation to meet the rotation margin required for the support position, ensure the mobility of the mechanism and avoid interference with the position of the cross bar itself.

[0030] This embodiment also provides an electric wheelchair, including a wheelchair frame, a power device and a wheel assembly device, wherein the wheelchair frame is provided with a wheelchair shock-absorbing assembly as in any of the above embodiments. Since the above wheelchair shock-absorbing assembly has the above beneficial effects, an electric wheelchair equipped with the wheelchair shock-absorbing assembly should also have corresponding beneficial effects.

[0031] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A wheelchair shock-absorbing assembly, comprising a front wheel chassis (2) for mounting a front wheel of a vehicle and a seat cushion frame (1) for supporting a seat cushion plate, characterized in that: The front wheel chassis (2) and the seat cushion frame (1) are rotatably connected to each other at one end adjacent to the backrest of the wheelchair; a shock absorber assembly (5) is connected to the top of the front wheel chassis (2) at one end where the front wheel is mounted; the other end of the shock absorber assembly (5) is connected to the seat cushion frame; and elastic shock absorption is performed between the front wheel and the seat cushion of the wheelchair via the shock absorber assembly (5).

2. The wheelchair shock-absorbing assembly according to claim 1, characterized in that: The front wheel underframe (2) is fixedly connected with a wheel frame cross bar (4) between two left and right frame rods on which the front wheels are respectively mounted, and the end of the shock absorber assembly (5) is connected to the wheel frame cross bar (4).

3. The wheelchair shock-absorbing assembly according to claim 2, characterized in that: The seat cushion frame is provided with a seat cushion cross bar near the end portion thereof facing the front wheel, and the two ends of the shock absorber assembly (5) are respectively connected to the wheel frame cross bar (4) and the seat cushion cross bar.

4. The wheelchair shock-absorbing assembly according to claim 3, characterized in that: The cushion cross bar (3) is an elastic strip plate structure, and its two ends are integrally fixedly connected to the cushion frame.

5. The wheelchair shock-absorbing assembly according to claim 3, characterized in that: Two groups of shock absorber assemblies (5) arranged in parallel are connected between the wheel frame cross bar (4) and the seat cushion cross bar. The shock absorber assemblies (5) are respectively connected to the vicinity of the end portions of the wheel frame cross bar (4) and the seat cushion cross bar.

6. The wheelchair shock-absorbing assembly according to claim 5, characterized in that: The shock absorber assembly comprises two connecting rods (5-1) sleeved with each other, the ends of the two connecting rods (5-1) are each provided with a support plate (5-3), a compression spring (5-2) is provided between the side support plates (5-3) between the two connecting rods (5-1), and an elastic support force is provided by the compression spring (5-2).

7. The wheelchair shock-absorbing assembly according to claim 6, characterized in that: A raised hinge platform (6) is provided at the position where the wheel frame cross bar (4) and the seat cushion cross bar are connected to the shock absorber assembly (5), and the hinge platform (6) is rotatably connected to the end of the shock absorber assembly (5).

8. An electric wheelchair, comprising a wheelchair frame, a power device and a wheel assembly, characterized in that: The wheelchair frame is provided with a wheelchair shock-absorbing assembly as described in any one of claims 1-6.

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