Auxiliary wheel mechanism and walking device

Abstract

The utility model discloses an auxiliary wheel mechanism which comprises a main mounting plate and a transition plate capable of being unfolded and folded along with a walking body, the middle portion of the transition plate is hinged to one end of the main mounting plate, one end of the transition plate is hinged to a connecting plate, and the other end of the main mounting plate is hinged to an auxiliary wheel mounting plate. Auxiliary wheels are connected to the ends, away from the main mounting plate, of the auxiliary wheel mounting plates; when the transition plate is unfolded along with the walking body, the transition plate drives the auxiliary wheel to move to a wheel tilting prevention state, when the transition plate is folded along with the walking body, the transition plate drives the auxiliary wheel to move to a folded state, and when the transition plate is vertically arranged, the transition plate serves as an auxiliary pushing wheel. According to the auxiliary wheel mechanism, through the design of the multi-connecting-rod structure, when the auxiliary wheel mechanism is folded and unfolded, the auxiliary wheel mechanism can be synchronously folded and unfolded, an additional locking structure does not need to be operated, operation is easy and convenient, the auxiliary wheel mechanism does not need to be additionally provided with a locking structure, and the overall structure of the device is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs, in particular to an auxiliary wheel mechanism and a walking device. Background Art

[0002] At present, the existing wheelchair anti-tilt wheel structures on the market are mainly based on manual adjustment and independent locking, which is cumbersome to operate. For example, the auxiliary wheel mechanism of an electric wheelchair disclosed in announcement number CN209236634U requires manual unlocking handle to adjust the auxiliary wheel position in both the folded and unfolded states of the wheelchair. The process is cumbersome and inconvenient for disabled people to operate. For example, the anti-tilt wheel device provided on the wheelchair motor disclosed in announcement number CN24766228U realizes the adjustment and locking of the anti-tilt wheel through an additional screw motor structure, which has a complex structure and high cost. Summary of the invention

[0003] The utility model aims to provide an auxiliary wheel mechanism and a walking device to solve the problems in the prior art that the auxiliary wheel needs to be designed with a locking structure, the adjustment is cumbersome, and the structure is complicated.

[0004] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0005] An auxiliary wheel mechanism comprises a main mounting plate and a transition plate which can be unfolded and folded following a walking body, wherein the middle portion of the transition plate is hingedly connected to one end of the main mounting plate, one end of the transition plate is hingedly connected to a connecting plate, the other end of the main mounting plate is hingedly connected to an auxiliary wheel mounting plate, and the end of the auxiliary wheel mounting plate which is away from the main mounting plate is connected to an auxiliary wheel;

[0006] The middle part of the connecting plate and the auxiliary wheel mounting plate is hinged, and when the transition plate is unfolded following the walking body, the transition plate drives the auxiliary wheel to move to the anti-tilt wheel state, and when the transition plate is folded following the walking body, the transition plate drives the auxiliary wheel to move to the folded state.

[0007] Furthermore, in the anti-tip wheel state, the angle a between the plane where the bottom surface of the rear wheel of the walking body is located and the plane where the line connecting the bottom end of the rear wheel and the bottom end of the auxiliary wheel is located is 9°~10°; the height of the bottom surface of the auxiliary wheel is higher than the height of the bottom surface of the rear wheel.

[0008] Furthermore, in the folded state, the auxiliary wheels are located in front of the plane where the rear ends of the rear wheels of the walking body are located or are flush with the plane.

[0009] Furthermore, in the folded state, an angle a between a plane where the rear end of the auxiliary wheel and the rear end of the rear wheel are located and a vertical plane of the rear wheel is 0° to 3°.

[0010] Furthermore, a first connecting hole is provided at the center of the auxiliary wheel spacer, and a second connecting hole is provided at a non-center of the auxiliary wheel spacer;

[0011] The first connection hole of the auxiliary wheel spacer and the fourth through hole of the auxiliary wheel mounting plate are connected via a pin shaft, and the second connection hole of the auxiliary wheel spacer and the second through hole of the connecting plate are connected via a pin shaft.

[0012] Furthermore, a limiting pin is provided in the middle portion of the auxiliary wheel mounting plate, and a limiting groove is provided at one end portion of the connecting plate. In the folded state, the limiting pin is located at one end of the limiting groove.

[0013] In a second aspect, the present application discloses a mobility device, comprising the auxiliary wheel mechanism described in any one of the first aspect.

[0014] According to the above technical solution, the beneficial effects of the utility model are:

[0015] The auxiliary wheel mechanism of the present application is designed with a multi-link structure. When the walking device is folded and unfolded, the auxiliary wheel mechanism can be folded and unfolded synchronously, and can be used as an anti-tilt wheel and an auxiliary wheel respectively. There is no need to operate an additional locking structure and operation, which is simple and convenient. The auxiliary wheel mechanism does not need to be additionally configured with a locking structure, and the overall structure of the device is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the auxiliary wheel mechanism in the utility model in the unfolded state;

[0017] Figure 2 This is a structural schematic diagram of the auxiliary wheel mechanism of the utility model in a folded state;

[0018] Figure 3 It is a structural schematic diagram of the connecting plate in the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the auxiliary wheel mounting plate in the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the auxiliary wheel spacer in the utility model;

[0021] Figure 6 It is a partial structural schematic diagram of a walking device equipped with an auxiliary wheel mechanism;

[0022] Figure 7 It is a structural schematic diagram of a mobility device equipped with an auxiliary wheel mechanism in an unfolded state;

[0023] Figure 8 It is a structural schematic diagram of a mobility device equipped with an auxiliary wheel mechanism in a folded state.

[0024] Among them: 100, wheelchair; 110, transition plate; 120, main mounting plate; 200, connecting plate; 300, auxiliary wheel spacer; 400, auxiliary wheel mounting plate; 500, auxiliary wheel; 101, front wheel; 102, rear wheel; 201, first through hole; 202, second through hole; 203, limiting groove; 301, first connecting hole; 302, second connecting hole; 401, third through hole; 402, fourth through hole; 403, fifth through hole; 404, limiting pin. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] It should be noted that in the description of the present invention, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention rather than requiring that the present invention must be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. The terms "front", "rear", "left", "right", "up", and "down" used in the description of the present invention refer to the directions in the accompanying drawings, and the terms "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0027] An auxiliary wheel mechanism includes a main mounting plate 120 and a transition plate 110 that can be unfolded and folded following a walking body 100. The middle portion of the transition plate 110 is hingedly connected to one end of the main mounting plate 120, one end of the transition plate 110 is hingedly connected to a connecting plate 200, the other end of the main mounting plate 120 is hingedly connected to an auxiliary wheel mounting plate 400, and one end of the auxiliary wheel mounting plate 400 away from the main mounting plate 120 is connected to an auxiliary wheel 500; the connecting plate 200 is hingedly connected to the middle portion of the auxiliary wheel mounting plate 400, when the transition plate 110 unfolds following the walking body 100, the transition plate 110 drives the auxiliary wheel 500 to move to an anti-tilt wheel state, and when the transition plate 110 folds following the walking body 100, the transition plate 110 drives the auxiliary wheel 500 to move to a folded state.

[0028] The auxiliary wheel mechanism of the present application is designed with a multi-link structure. When the walking device is folded and unfolded, the auxiliary wheel mechanism can be folded and unfolded synchronously without operating an additional locking structure. The operation is simple and convenient. The auxiliary wheel mechanism does not need to be additionally configured with a locking structure, and the overall structure of the device is simple.

[0029] The present application is described below by means of a specific embodiment.

[0030] In the present application, the structures of the connecting plate 200 and the auxiliary wheel mounting plate 400 are as follows: Figure 3 and Figure 4 As shown, the connecting plate 200 has a first through hole 201 at one end and a second through hole 202 at the other end. The auxiliary wheel mounting plate 400 has a third through hole 401 at one end, a fourth through hole 402 in the middle, and a fifth through hole 403 at the other end.

[0031] like Figure 1 and Figure 2 As shown, the middle part of the transition plate 110 is hinged to the upper left end of the main mounting plate 120, and the transition plate 110 can rotate around the main mounting plate 120. The first through hole 201 at the left end of the connecting plate 200 is hingedly connected to one end of the transition plate 110, the second through hole 202 at the right end of the connecting plate 200 is hingedly connected to the fourth through hole 402 in the middle part of the auxiliary wheel mounting plate 400, the third through hole 401 at the left end of the auxiliary wheel mounting plate 400 is hinged to the lower right end of the main mounting plate 120, and the auxiliary wheel 500 is hinged to the fifth through hole 403 at the right end of the auxiliary wheel mounting plate 400.

[0032] The transition plate 110 is the driving component of the auxiliary wheel mechanism. The end of the transition plate 110 away from the connecting plate 200 is connected to the walking body 100, and moves when the walking body 100 is unfolded and folded. When the walking body 100 is unfolded, the transition plate 110 rotates clockwise, and drives the auxiliary wheel mounting plate 400 to rotate clockwise through the connecting plate 200, so that the auxiliary wheel 500 at the right end of the auxiliary wheel mounting plate 400 follows to unfold. When the walking body 100 is folded, the transition plate 110 rotates counterclockwise, and drives the auxiliary wheel mounting plate 400 to rotate counterclockwise through the connecting plate 200, so that the auxiliary wheel 500 at the right end of the auxiliary wheel mounting plate 400 follows to fold.

[0033] When the auxiliary wheels 500 are in the unfolded state, Figure 1 As shown, when in the folded state Figure 5 shown.

[0034] In a further embodiment, the connecting plate 200 and the auxiliary wheel mounting plate 400 are connected via an auxiliary wheel spacer 300, a first connecting hole 301 is provided at the center of the auxiliary wheel spacer 300, and a second connecting hole 302 is provided at a non-center of the auxiliary wheel spacer 300; the first connecting hole 301 of the auxiliary wheel spacer 300 and the fourth through hole 402 of the auxiliary wheel mounting plate 400 are connected via a pin, and the second connecting hole 302 of the auxiliary wheel spacer 300 and the second through hole 202 of the connecting plate 200 are connected via a pin.

[0035] By disposing the auxiliary wheel spacer 300 , the rotation effect and rotation angle of the connecting plate 200 and the auxiliary wheel mounting plate 400 can be guaranteed.

[0036] In a further embodiment, a limiting pin 404 is provided in the middle of the auxiliary wheel mounting plate 400, and a limiting groove 203 is provided at the right end of the connecting plate 200. Preferably, the limiting groove 203 is an arc groove and is concentric with the second through hole 202. When the auxiliary wheel is in the folded state, the limiting pin 404 is located at one end of the limiting groove 203. Through the design of the limiting pin 404 and the limiting groove 203, the position and movement state of the connecting plate 200 and the auxiliary wheel mounting plate 400 can be limited in the folded state, thereby ensuring the stability of the auxiliary wheel mechanism in the folded state.

[0037] In one embodiment, Figure 6 and Figure 7 As shown, in the anti-tilt wheel state, the angle a1 between the plane where the bottom surface of the rear wheel 102 of the walking body 100 is located and the plane where the line connecting the bottom end of the rear wheel 102 and the bottom end of the auxiliary wheel 500 is located is 9° to 10°; the height of the bottom surface of the auxiliary wheel 500 is higher than the height of the bottom surface of the rear wheel 102. This design ensures a good anti-tilt effect of the auxiliary wheel mechanism.

[0038] In one embodiment, in the folded state, the auxiliary wheel 500 is located inside the plane where the rear ends of the rear wheels 102 of the walking body 100 are located. Figure 8 As shown, the auxiliary wheel 500 is located on the left side of the vertical plane where the right end of the rear wheel 102 is located. This design prevents the auxiliary wheel mechanism from being outside the walking body when in the folded state, thereby reducing the overall volume of the device when in the folded state.

[0039] Furthermore, in the folded state, an angle a2 between a plane where the rear end of the auxiliary wheel 500 and the rear end of the rear wheel 102 are connected and a vertical plane of the rear wheel 102 is 0° to 3°.

[0040] In the present application, when the auxiliary wheel mechanism is deployed, the auxiliary wheel mounting plate 400 rotates clockwise around the third through hole 401 at the front end of the auxiliary wheel mounting plate until the limit pin 404 contacts the upper end of the limit slot 203, and the auxiliary wheel mechanism is deployed to the position and stops. At this time, the angle between the auxiliary wheel assembly and the rear wheel is in the range of 9° to 10°.

[0041] When the auxiliary wheel assembly is folded, the auxiliary wheel mounting plate 400 rotates counterclockwise around the third through hole 401 at the front end of the auxiliary wheel mounting plate until the limit pin 404 contacts the lower end of the limit slot 203, and the auxiliary wheel structure folds into place and stops. At this time, the angle between the auxiliary wheel assembly and the rear wheel ranges from 0° to 3°.

[0042] The present application utilizes a multi-link structure to achieve synchronous folding, unfolding and locking of the auxiliary wheel assembly and the wheelchair, eliminates the auxiliary wheel locking unit, and has a simple structure.

[0043] By optimizing the movement trajectory of the auxiliary wheels and using the limit pin to limit the unfolding and folding positions of the auxiliary wheels, the auxiliary wheel assembly can achieve multiple functions such as anti-tilting when unfolding the vehicle body, auxiliary support when folding, and auxiliary movement.

[0044] In one embodiment, based on the auxiliary wheel mechanism provided in any of the above embodiments, this embodiment further provides a walking device, which can be as follows: Figure 6-8 The wheelchair shown can also be a walker, a walking chair, a scooter for the elderly, a baby carriage, etc.

[0045] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. An auxiliary wheel mechanism, comprising a main mounting plate (120) and a transition plate (110) capable of unfolding and folding along with a walking body (100), characterized in that: The middle portion of the transition plate (110) is hingedly connected to one end of the main mounting plate (120), one end of the transition plate (110) is hingedly connected to the connecting plate (200), the other end of the main mounting plate (120) is hingedly connected to an auxiliary wheel mounting plate (400), and one end of the auxiliary wheel mounting plate (400) away from the main mounting plate (120) is connected to an auxiliary wheel (500); The middle parts of the connecting plate (200) and the auxiliary wheel mounting plate (400) are hinged, and when the transition plate (110) unfolds following the walking body (100), the transition plate (110) drives the auxiliary wheel (500) to move to an anti-tilt wheel state, and when the transition plate (110) folds following the walking body (100), the transition plate (110) drives the auxiliary wheel (500) to move to a folded state.

2. The auxiliary wheel mechanism according to claim 1, characterized in that: In the anti-tip wheel state, an angle a1 between a plane where the bottom surface of the rear wheel (102) of the walking body (100) is located and a plane where a line connecting the bottom end of the rear wheel (102) and the bottom end of the auxiliary wheel (500) is located is 9° to 10°; and the height of the bottom surface of the auxiliary wheel (500) is higher than the height of the bottom surface of the rear wheel (102).

3. The auxiliary wheel mechanism according to claim 1, characterized in that: When in the folded state, the auxiliary wheel (500) is located at the front side of the plane where the rear end of the rear wheel (102) of the walking body (100) is located.

4. The auxiliary wheel mechanism according to claim 3, characterized in that: When in the folded state, the angle a2 between the plane where the rear end of the auxiliary wheel (500) and the rear end of the rear wheel (102) are located and the vertical plane of the rear wheel (102) is 0° to 3°.

5. The auxiliary wheel mechanism according to claim 1, characterized in that: A first connection hole (301) is provided at the center of the auxiliary wheel spacer (300), and a second connection hole (302) is provided at a non-center portion of the auxiliary wheel spacer (300); The first connection hole (301) of the auxiliary wheel spacer (300) and the fourth through hole (402) of the auxiliary wheel mounting plate (400) are connected via a pin, and the second connection hole (302) of the auxiliary wheel spacer (300) and the second through hole (202) of the connecting plate (200) are connected via a pin.

6. The auxiliary wheel mechanism according to claim 1, characterized in that: A limiting pin (404) is provided in the middle of the auxiliary wheel mounting plate (400), and a limiting groove (203) is provided at one end of the connecting plate (200). In the folded state, the limiting pin (404) is located at one end of the limiting groove (203).

7. A walking device, characterized in that: The auxiliary wheel mechanism comprises the auxiliary wheel mechanism according to any one of claims 1 to 6.

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