Wheelchair front wheel vertical shock absorption structure and wheelchair thereof

Abstract

The utility model provides a wheel chair front wheel vertical shock-proof structure and a wheel chair thereof, and relates to the technical field of wheel chairs, the wheel chair front wheel vertical shock-proof structure comprises a wheel fork fixing assembly and a movable frame body, a buffer damper is arranged between the wheel fork fixing assembly and the movable frame body, the movable frame body is rotatably connected with a front wheel assembly, and sliding grooves are formed in the two sides of the wheel fork fixing assembly. The length direction of the chute is vertical to the horizontal plane; the two sides of the front wheel assembly are connected to the sliding grooves, and the front wheel assembly can slide in the length direction of the sliding grooves so that the front wheel assembly can vertically ascend and descend relative to the wheel fork fixing assembly. The wheelchair has the advantages that the front wheel assembly vertically ascends and descends relative to the wheel fork fixing assembly, the stress gravity center of a front wheel cannot laterally deviate when the wheelchair runs on a bumpy road, and the stability of the direction controllability of the wheelchair can be kept; when the front wheel ascends and descends, the guide screw rod can be driven to vertically ascend and descend in the vertical guide sleeve, so that the buffer damper is compressed, deformed and stressed in the vertical direction, and the stress is relatively stable.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchairs, in particular to a vertical shock-absorbing structure of a front wheelchair and the wheelchair. Background Art

[0002] Wheelchairs are commonly seen as transportation devices in daily life. They are often used in hospitals or for people with limited mobility. The cushioning quality of the wheelchair directly affects the user's experience and feelings when sitting in the wheelchair.

[0003] In the prior art, the technical scheme of the Chinese patent document (Announcement No.: CN220124982U, Patent Name: A Front Wheel Buffer Device) discloses that "it includes a concave support plate, in which the front wheel is rotatably connected, a buffer block is provided above the concave support plate, a buffer assembly is provided between the concave support plate and the buffer block, the two ends of the buffer assembly are respectively against the concave support plate and the buffer block, and the vertical axis of the buffer assembly coincides with the vertical axis of the front wheel."

[0004] Combined with the description and drawings of the patent document, the device uses an angle compression buffer device to achieve a buffering effect. The wheelchair controls the direction of the front wheels by driving two connecting arms. When one of the front wheels encounters an obstacle, the front wheel will drive the connecting arm to rotate backward, causing the force center of the front wheel to shift to the side, affecting the direction control of the wheelchair. Utility Model Content

[0005] The utility model overcomes the shortcomings of the prior art and provides a wheelchair front wheel vertical shock-absorbing structure and a wheelchair thereof, which ensures that the force-bearing center of gravity does not deviate laterally and maintains the stability of the wheelchair's directional controllability.

[0006] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0007] A vertical shock-absorbing structure for the front wheel of a wheelchair comprises a wheel fork fixing assembly and a movable frame, a buffer damper is arranged between the wheel fork fixing assembly and the movable frame, the movable frame is rotatably connected to the front wheel assembly, and slide grooves are arranged on both sides of the wheel fork fixing assembly, and the length direction of the slide grooves is perpendicular to the horizontal plane; the two sides of the front wheel assembly are connected to the slide grooves and can slide along the length direction of the slide grooves so that the front wheel assembly can be vertically lifted and lowered relative to the wheel fork fixing assembly.

[0008] Furthermore, the fork fixing assembly includes an axle fixing plate, a fork fixing plate is arranged on both sides of the axle fixing plate, and a slide groove is arranged at the bottom end of the fork fixing plate.

[0009] Furthermore, the front wheel assembly includes a front wheel, a connecting shaft is connected in the middle of the front wheel, the connecting shaft is rotatably connected to the movable frame, guide bushings are arranged at both ends of the connecting shaft, and the guide bushings are slidably connected to the slide groove; the buffer damper is located directly above the center of the front wheel.

[0010] Furthermore, the diameter of the guide bushing matches the width of the slide groove.

[0011] Furthermore, a limiting component is arranged between the wheel fork fixing component and the movable frame, and the buffer damper is sleeved on the limiting component.

[0012] Furthermore, the limiting component includes a vertical guide sleeve, the upper end of the vertical guide sleeve is threadedly connected to the wheel axle fixing plate, the buffer damper is sleeved on the lower end of the vertical guide sleeve, a guide screw is slidably connected in the vertical guide sleeve, and the lower end of the guide screw is connected to the movable frame.

[0013] Furthermore, the wheel axle fixing plate is plugged with the wheel axle, the upper end of the wheel axle is provided with a first thread, the lower end of the wheel axle is provided with a second thread, and the second thread is connected with a nut.

[0014] Furthermore, the wheel axle is also provided with a limiting member, and when the wheel axle is assembled to the wheel axle fixing plate, the limiting member is arranged above the wheel axle fixing plate.

[0015] A wheelchair comprises any one of the above-mentioned vertical shock-absorbing structures for the front wheels of the wheelchair.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The front wheel assembly is lifted vertically relative to the fork fixing assembly, that is, the buffer damper is compressed vertically upward to achieve a buffering effect. The force center of the front wheel will not deviate to the side when driving on bumpy roads, and the directional controllability of the wheelchair can be kept stable. When the front wheel is lifted or lowered, the guide screw will be driven to lift vertically in the vertical guide sleeve, thereby ensuring that the buffer damper is subjected to compression deformation force in the vertical direction, and the force is relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a general diagram of the vertical shock-absorbing structure of the front wheelchair wheel of the embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of a fork fixing assembly according to an embodiment of the utility model;

[0021] Figure 3is a schematic diagram of a front wheel assembly of an embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the vertical shock-absorbing structure of the front wheelchair of an embodiment of the utility model;

[0023] Figure 5 is a partial cross-sectional view of the vertical shock-absorbing structure of the front wheelchair wheelchair of an embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of the axle of an embodiment of the utility model.

[0025] In the figure: 1-wheel fork fixing assembly, 101-wheel axle fixing plate, 102-wheel fork fixing plate, 1021-slide groove, 2-movable frame, 3-front wheel assembly, 301-front wheel, 302-connecting shaft, 303-guide bushing, 4-buffer damper, 5-limiting assembly, 501-vertical guide sleeve, 502-guide screw, 6-wheel axle, 601-first thread, 602-second thread, 603-nut, 604-limiting member. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] like Figure 1 to Figure 2 As shown, a vertical shock-absorbing structure for the front wheel of a wheelchair comprises a fork fixing assembly 1 and a movable frame 2, a buffer damper 4 is arranged between the fork fixing assembly 1 and the movable frame 2, the movable frame 2 is rotatably connected with the front wheel assembly 3, and slide grooves 1021 are arranged on both sides of the fork fixing assembly 1, and the length direction of the slide grooves 1021 is perpendicular to the horizontal plane; both sides of the front wheel assembly 3 are connected to the slide grooves 1021 and can slide along the length direction of the slide grooves 1021, so that the front wheel assembly 3 can be vertically lifted and lowered relative to the fork fixing assembly 1.

[0028] Specifically, Figures 2 to 3As shown, the fork fixing assembly 1 includes an axle fixing plate 101, fork fixing plates 102 are arranged on both sides of the axle fixing plate 101, and a slide groove 1021 is arranged at the bottom of the fork fixing plate 102. The front wheel assembly 3 includes a front wheel 301, a connecting shaft 302 is connected in the middle of the front wheel 301, and the movable frame 2 is rotatably connected to the connecting shaft 302. Guide bushings 303 are arranged at both ends of the connecting shaft 302, and the guide bushings 303 are slidably connected to the slide groove 1021. The diameter of the guide bushing 303 matches the width of the slide groove 1021, and the diameter of the guide bushing 303 is smaller than the width of the slide groove 1021, so as to facilitate the guide bushing 303 to slide up and down on the slide groove 1021; the buffer damper 4 is located directly above the center of the front wheel 301. In this embodiment, the buffer damper 4 is a spring. When the front wheel 301 rises, it will directly act on the buffer damper 4, so that the buffer damper 4 is compressed in the vertical direction, thereby achieving a better buffering effect.

[0029] like Figure 4 As shown, a limiting component 5 is arranged between the wheel fork fixing component 1 and the movable frame 2, and the buffer damper 4 is sleeved on the limiting component 5. The limiting component 5 includes a vertical guide sleeve 501, the upper end of the vertical guide sleeve 501 is threadedly connected to the wheel axle fixing plate 101, and the buffer damper 4 is sleeved on the lower end of the vertical guide sleeve 501. A guide screw 502 is slidably connected in the vertical guide sleeve 501, and the lower end of the guide screw 502 is connected to the movable frame 2, as shown in FIG. Figure 5 As shown, a locking structure is formed at the joint of the vertical guide sleeve 501 and the guide screw 502. An opening is provided at the lower end of the vertical guide sleeve 501 to facilitate the guide screw 502 to slide up and down in the opening. The guide screw 502 is composed of a rod head and a rod body, and the diameter of the rod head is larger than the diameter of the opening, thereby limiting the guide screw 502 from escaping from the vertical guide sleeve 501 while ensuring that the guide screw 502 can be vertically lifted and lowered in the vertical guide sleeve 501, thereby ensuring that the buffer damper 4 can be compressed and deformed in the vertical direction and the generated force is directly transmitted to the front wheel 301 below without being dispersed forcefully, thereby achieving the buffering effect to the greatest extent.

[0030] like Figure 6 As shown, the wheel axle fixing plate 101 is plugged with the wheel axle 6, the upper end of the wheel axle 6 is provided with a first thread 601, the lower end of the wheel axle 6 is provided with a second thread 602, the second thread 602 is connected with a nut 603, and the wheel axle 6 is also provided with a limiting member 604. When the wheel axle 6 is assembled to the wheel axle fixing plate 101, the limiting member 604 is arranged above the wheel axle fixing plate 101, and the limiting member 604 serves to limit the depth of the wheel axle 6 plugged into the wheel axle fixing plate 101. After the wheel axle 6 is plugged in, the nut 603 is used to connect with the second thread 602, so as to fix the wheel axle 6 on the wheel axle fixing plate 101, and then the wheel axle 6 is connected to the wheelchair through the first thread 601, so as to realize the installation of the utility model.

[0031] Working principle: When the front wheel 301 encounters an obstacle, the front wheel 301 drives the movable frame 2 to move upward through the connecting shaft 302, so that the guide bushing 303 slides and rises at the slide groove 1021, and the movable frame 2 drives the guide screw 502 to rise in the vertical guide sleeve 501, so that the buffer damper 4 is compressed and deformed in the vertical direction. The buffering effect is achieved by compressing the buffer damper 4 vertically upward, which will prevent the center of gravity of the front wheel 301 from being lateralized when driving on bumpy roads, thereby maintaining the stability of the wheelchair's directional controllability.

[0032] The utility model also seeks to protect a wheelchair, comprising the above-mentioned vertical shock-absorbing structure for the front wheels of the wheelchair, through which the vertical shock-absorbing structure for the front wheels of the wheelchair enables the wheelchair to achieve a buffering function while ensuring the stability of the wheelchair's directional control.

[0033] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical shock-absorbing structure for the front wheel of a wheelchair, characterized in that: The invention comprises a wheel fork fixing assembly (1) and a movable frame (2), wherein a buffer damper (4) is arranged between the wheel fork fixing assembly (1) and the movable frame (2), the movable frame (2) is rotatably connected to a front wheel assembly (3), and slide grooves (1021) are arranged on both sides of the wheel fork fixing assembly (1), wherein the length direction of the slide grooves (1021) is perpendicular to a horizontal plane; both sides of the front wheel assembly (3) are connected to the slide grooves (1021) and can slide along the length direction of the slide grooves (1021) so that the front wheel assembly (3) can be vertically lifted or lowered relative to the wheel fork fixing assembly (1).

2. A wheelchair front wheel vertical shock-absorbing structure according to claim 1, characterized in that: The wheel fork fixing assembly (1) comprises a wheel axle fixing plate (101), wheel fork fixing plates (102) are arranged on both sides of the wheel axle fixing plate (101), and a slide groove (1021) is arranged at the bottom end of the wheel fork fixing plate (102).

3. A wheelchair front wheel vertical shock-absorbing structure according to claim 2, characterized in that: The front wheel assembly (3) comprises a front wheel (301), a connecting shaft (302) is connected in the middle of the front wheel (301), the connecting shaft (302) is rotatably connected to the movable frame (2), guide bushings (303) are arranged at both ends of the connecting shaft (302), and the guide bushings (303) are slidably connected to the slide groove (1021); the buffer damper (4) is located directly above the center of the front wheel (301).

4. A wheelchair front wheel vertical shock-absorbing structure according to claim 3, characterized in that: The diameter of the guide bushing (303) matches the width of the slide groove (1021).

5. The vertical shock-absorbing structure of the front wheel of a wheelchair according to claim 1, characterized in that: A limiting component (5) is provided between the wheel fork fixing component (1) and the movable frame (2), and the buffer damper (4) is sleeved on the limiting component (5).

6. A wheelchair front wheel vertical shock-absorbing structure according to claim 5, characterized in that: The limiting assembly (5) comprises a vertical guide sleeve (501), the upper end of the vertical guide sleeve (501) is threadedly connected to the wheel axle fixing plate (101), the buffer damper (4) is sleeved on the lower end of the vertical guide sleeve (501), a guide screw (502) is slidably connected inside the vertical guide sleeve (501), and the lower end of the guide screw (502) is connected to the movable frame (2).

7. The vertical shock-absorbing structure of the front wheel of a wheelchair according to claim 2, characterized in that: The wheel axle fixing plate (101) is plugged with a wheel axle (6), the upper end of the wheel axle (6) is provided with a first thread (601), the lower end of the wheel axle (6) is provided with a second thread (602), and the second thread (602) is connected with a nut (603).

8. The vertical shock-absorbing structure of the front wheel of a wheelchair according to claim 7, characterized in that: The wheel axle (6) is also provided with a limiting member (604); when the wheel axle (6) is assembled to the wheel axle fixing plate (101), the limiting member (604) is arranged above the wheel axle fixing plate (101).

9. A wheelchair, characterized in that: A wheelchair front wheel vertical shock absorbing structure comprising any one of claims 1 to 8.

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