Wheel damping mechanism of electric wheelchair

Abstract

The utility model discloses a wheel damping mechanism of an electric wheelchair, which is characterized in that the lower bottom wall of a protective shell is fixedly connected with a spring shell, the upper top wall of the spring shell is fixedly connected with a buffer spring, the lower end of the buffer spring is fixedly connected with a supporting rod, the lower end of the supporting rod is fixedly connected with a supporting plate, and the lower surface of the supporting plate is fixedly connected with a bottom shell; the lower surface of the protective shell is fixedly connected with a damper, the front surface of the protective shell is rotationally connected with a shell cover through a rotating shaft, through the devices, the stability and controllability of the wheelchair can be improved, the safety and comfort of the wheelchair and a user of the wheelchair are guaranteed, and the practicability and durability of the wheelchair are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wheelchairs, in particular to a wheel shock absorbing mechanism of an electric wheelchair. Background Art

[0002] As a means of transportation for people with limited mobility, the shock absorption performance of electric wheelchairs directly affects the user's riding experience. When traveling on uneven roads, a good shock absorption mechanism can reduce vibration and impact and improve the user's comfort. However, the wheel shock absorption mechanism of existing electric wheelchairs may be limited in practicality and durability due to complex structure, difficult maintenance or non-durable materials. For example, a Chinese patent discloses "an electric wheelchair front wheel shockproof body fine-tuning mechanism", and its application number is: "202022485518.2". It can efficiently buffer the vibration generated by the front wheel during operation by installing two shock-absorbing rods, and the wheel tread of the front wheel is made of wear-resistant shock-absorbing material, which further enhances the overall shock absorption effect of the mechanism. However, the shock-absorbing spring of the mechanism is exposed to the outside and may be damaged, resulting in limited practicality and durability of the wheelchair. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a wheel shock absorbing mechanism for an electric wheelchair. By arranging a spring buffer mechanism composed of multiple limit springs and support rods inside the protective box, and cooperating with multiple dampers on the lower surface of the protective shell, the stability and controllability of the wheelchair can be increased, the safety and comfort of the wheelchair and its user are guaranteed, and the practicality and durability of the wheelchair are improved. By arranging a rotatable shell cover on the front surface of the protective shell, the internal accessories can be easily maintained, and the lower end of the support rod and the support plate are located inside the bottom shell, which can protect the components to a certain extent and extend the service life of the accessories, which is beneficial to improving the overall durability of the mechanism.

[0004] The utility model also provides a wheel shock-absorbing mechanism with the above-mentioned electric wheelchair, comprising: a protective shell, a spring shell fixedly connected to the lower bottom wall of the protective shell, a buffer spring fixedly connected to the upper top wall of the spring shell, a support rod fixedly connected to the lower end of the buffer spring, a support plate fixedly connected to the lower end of the support rod, a bottom shell fixedly connected to the lower surface of the support plate, a damper fixedly connected to the lower surface of the protective shell, and a shell cover rotatably connected to the front surface of the protective shell via a rotating shaft. Through the above device, the stability and controllability of the wheelchair can be increased, the safety and comfort of the wheelchair and its user are guaranteed, and it is beneficial to improve the practicality and durability of the wheelchair.

[0005] For a wheel shock-absorbing mechanism of an electric wheelchair according to the present utility model, the upper end of the support rod is located inside the spring housing, and the support rod penetrates through the spring housing and the protective housing. With the above device, it is beneficial for the buffer spring to work accurately.

[0006] For a wheel shock-absorbing mechanism of an electric wheelchair according to the present utility model, the lower end of the damper is fixedly connected to the upper surface of the support plate and is located between the support rods. With the above device, it is beneficial to enhance the shock-absorbing performance.

[0007] For a wheel shock-absorbing mechanism of an electric wheelchair according to the present utility model, the upper surface of the protective housing is fixedly connected with an upper connecting rod, and the lower surface of the bottom shell is fixedly connected with a lower connecting rod. With the above device, it is beneficial to connect the wheel and the seat together through the mechanism.

[0008] For a wheel shock-absorbing mechanism of an electric wheelchair according to the present utility model, a pulling groove is provided on the front surface of the shell cover, and the shell cover covers the front surface of the protective housing. With the above device, it is beneficial to conveniently open and close the shell cover for repairing internal parts.

[0009] For a wheel shock-absorbing mechanism of an electric wheelchair according to the present utility model, the lower surface of the protective housing is fixedly connected with a limiting rod, and the cross-section of the limiting rod is L-shaped. With the above device, it is beneficial to prevent the protective housing and the bottom shell from shifting.

[0010] For a wheel shock-absorbing mechanism of an electric wheelchair according to the present utility model, positioning grooves are provided on the left and right inner walls of the bottom shell, and the lower end of the limiting rod is located inside the positioning grooves. With the above device, it is beneficial to provide the moving track of the limiting rod.

[0011] For a wheel shock-absorbing mechanism of an electric wheelchair according to the present utility model, the bottom shell covers the lower surface of the protective housing, and the support plate and the damper are both located inside the bottom shell. With the above device, it is beneficial to protect internal components. Beneficial effects

[0012] 1. Compared with the prior art, for the wheel shock-absorbing mechanism of this electric wheelchair, by arranging a spring buffer mechanism composed of multiple limiting springs and support rods inside the protective box, and cooperating with multiple dampers on the lower surface of the protective housing, it can increase the stability and controllability of the wheelchair, ensure the safety and comfort performance of the wheelchair and its user, and is beneficial to improving the practicality and durability of the wheelchair.

[0013] 2. Compared with the prior art, for the wheel shock-absorbing mechanism of this electric wheelchair, by arranging a rotatable shell cover on the front surface of the protective housing, it can facilitate the maintenance of internal accessories, and the lower end of the support rod and the support plate are located inside the bottom shell, which can protect the components to a certain extent and extend the service life of the accessories, and is beneficial to improving the overall durability of the mechanism. Brief Description of the Drawings

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0015] Figure 1 It is a three-dimensional structure diagram of the wheel shock absorption mechanism of the electric wheelchair of the present utility model;

[0016] Figure 2 It is an internal structure diagram of the wheel shock absorption mechanism of the electric wheelchair of the present utility model;

[0017] Figure 3 It is a cross-sectional structure diagram of the wheel shock absorption mechanism of the electric wheelchair of the present utility model;

[0018] Figure 4 It is a sectional view structure diagram of the wheel shock absorption mechanism of the electric wheelchair of the present utility model.

[0019] Legend Explanation:

[0020] 1. Protective shell; 2. Shell cover; 3. Upper connecting rod; 4. Bottom shell; 5. Lower connecting rod; 6. Spring shell; 7. Support rod; 8. Buffer spring; 9. Support plate; 10. Limit rod; 11. Positioning groove; 12. Rotating shaft; 13. Damper. Detailed Embodiment

[0021] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be construed as a limitation on the protection scope of the present utility model.

[0022] Refer to Figures 1-4, in an embodiment of the present utility model, a wheel shock-absorbing mechanism for an electric wheelchair includes: a protective shell 1 for providing an installation space for a spring shell 6. The upper surface of the protective shell 1 is fixedly connected with an upper connecting rod 3, which is used to connect the protective shell 1 (and the internal shock-absorbing mechanism) to the frame of the electric wheelchair or other fixed parts, and transmit the load of the electric wheelchair. The lower bottom wall of the protective shell 1 is fixedly connected with a spring shell 6, which is used to provide a container for fixing and guiding a buffer spring 8, ensuring that the buffer spring 8 can move along a predetermined path when compressed. The upper top wall of the spring shell 6 is fixedly connected with a buffer spring 8, which is responsible for absorbing and dispersing the impact and vibration energy from the ground, protecting the rider from bumps. The lower end of the buffer spring 8 is fixedly connected with a support rod 7, which is used to transmit the elastic force of the buffer spring 8 to a support plate 9, and then support the entire electric wheelchair. The upper end of the support rod 7 is located inside the spring shell 6. The support rod 7 penetrates through the spring shell 6 and the protective shell 1. The lower end of the support rod 7 is fixedly connected with a support plate 9, which provides an installation base for a damper 13 and connects the support rods 7 together. The lower surface of the support plate 9 is fixedly connected with a bottom shell 4, which is used to cover and protect the bottom of the shock-absorbing mechanism, preventing dust and debris from entering.

[0023] The lower surface of the bottom shell 4 is fixedly connected with a lower connecting rod 5, which is used to connect the bottom shell 4 (and the internal shock-absorbing mechanism) to the wheel of the electric wheelchair or other moving parts, ensuring that the wheel can rotate freely as the electric wheelchair moves and transmitting the impact force from the wheel to the shock-absorbing mechanism. The lower surface of the protective shell 1 is fixedly connected with a damper 13, which is used to generate a damping force to slow down the vibration frequency and amplitude of the spring, further improving the shock-absorbing effect. The lower end of the damper 13 is fixedly connected to the upper surface of the support plate 9 and is located between the support rods 7. The front surface of the protective shell 1 is rotatably connected with a shell cover 2 through a rotating shaft 12, which is used to cover the front surface of the protective shell 1 and protect the internal components from the external environment. The front surface of the shell cover 2 is provided with a pulling groove, which is used to facilitate the opening and closing of the shell cover 2. The shell cover 2 covers the front surface of the protective shell 1. The lower surface of the protective shell 1 is fixedly connected with a limiting rod 10, which is used to ensure the connection between the protective shell 1 and the bottom shell 4. The cross-section of the limiting rod 10 is L-shaped. The left and right inner walls of the bottom shell 4 are provided with positioning grooves 11, which are used to cooperate with the limiting rod 10 to enhance the stability of the shock-absorbing mechanism. The lower end of the limiting rod 10 is located inside the positioning groove 11. The bottom shell 4 covers the lower surface of the protective shell 1. The support plate 9 and the damper 13 are both located inside the bottom shell 4.

[0024] Working principle: The upper connecting rod 3 of the mechanism is fixed on the lower surface of the seat, and the lower connecting rod 5 is used to connect the wheel and the mechanism. When the electric wheelchair travels on an uneven road surface, the wheel will receive impact force and vibration from the ground. These forces are first transmitted through the wheel to the support rod 7 inside the bottom shell 4 and the damper 13. The upper end of the support rod 7 is located inside the spring shell 6 and is fixedly connected to the lower end of the buffer spring 8. Therefore, when the support rod 7 is subjected to an impact force, it will compress the buffer spring 8. After being compressed, the buffer spring 8 will produce elastic deformation, thereby absorbing and dispersing the impact energy and reducing the vibration transmitted to other parts of the wheelchair, especially the seating area. At the same time, the damper 13 is installed on the lower surface of the protective shell 1, its lower end is fixedly connected to the upper surface of the support plate 9, and it is located between the support rods 7. The damper 13 generates a damping force through the damping medium (such as oil) inside it when being impacted, further slowing down the vibration speed of the support rod 7 and improving the damping effect. The damper and the buffer spring 8 work together to form a more perfect damping system, making the electric wheelchair more stable during driving. The shell cover 2 is rotatably connected to the front surface of the protective shell 1 through the rotating shaft 12 and covers the front surface of the protective shell 1. The pulling groove provided on the shell cover 2 facilitates the user to open and close the shell cover 2. When the shell cover 2 is closed, it can effectively prevent dust, water and other sundries from entering the inside of the damping mechanism and protect the internal components from pollution and damage. The bottom shell 4 covers the lower surface of the protective shell 1 and is tightly connected to the protective shell 1 through the cooperation of the positioning groove 11 and the limiting rod 10.

[0025] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which the present invention pertains, various changes can also be made without departing from the gist of the present invention.

Claims

1. A wheel shock-absorbing mechanism for an electric wheelchair, characterized in that, Including: A protective shell (1), a spring housing (6) is fixedly connected to the lower bottom wall of the protective shell (1), a buffer spring (8) is fixedly connected to the upper top wall of the spring housing (6), a support rod (7) is fixedly connected to the lower end of the buffer spring (8), a support plate (9) is fixedly connected to the lower end of the support rod (7), a bottom shell (4) is fixedly connected to the lower surface of the support plate (9), a damper (13) is fixedly connected to the lower surface of the protective shell (1), and a shell cover (2) is rotatably connected to the front surface of the protective shell (1) through a rotating shaft (12).

2. The wheel shock absorption mechanism of an electric wheelchair according to claim 1, characterized in that, The upper end of the support rod (7) is located inside the spring housing (6), and the support rod (7) penetrates through the spring housing (6) and the protective shell (1).

3. The wheel shock absorption mechanism of an electric wheelchair according to claim 1, characterized in that, The lower end of the damper (13) is fixedly connected to the upper surface of the support plate (9) and is located between the support rods (7).

4. The wheel shock-absorbing mechanism of an electric wheelchair according to claim 1, wherein, An upper connecting rod (3) is fixedly connected to the upper surface of the protective shell (1), and a lower connecting rod (5) is fixedly connected to the lower surface of the bottom shell (4).

5. The wheel shock absorption mechanism of an electric wheelchair according to claim 1, characterized in that, A pulling groove is provided on the front surface of the shell cover (2), and the shell cover (2) covers the front surface of the protective shell (1).

6. The wheel shock absorption mechanism of an electric wheelchair according to claim 1, characterized in that, A limiting rod (10) is fixedly connected to the lower surface of the protective shell (1), and the cross section of the limiting rod (10) is L-shaped.

7. The wheel shock-absorbing mechanism of an electric wheelchair according to claim 6, characterized in that, Positioning grooves (11) are provided on the left and right inner walls of the bottom shell (4), and the lower end of the limiting rod (10) is located inside the positioning grooves (11).

8. The wheel shock absorption mechanism of an electric wheelchair according to claim 1, characterized in that, The bottom shell (4) covers the lower surface of the protective shell (1), and both the support plate (9) and the damper (13) are located inside the bottom shell (4).

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