Shaft sleeve limiting structure and wheelchair
By setting a T-shaped notch and a stop groove at the end of the wheelchair's central tube, combined with the design of the bushing and clamp, the problem of seat height change when adjusting the wheelchair width is solved, realizing flexible adjustment of the wheelchair width and improving practicality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-31
AI Technical Summary
The width of existing wheelchairs is fixed, which makes it difficult to meet the needs of users with different body types. Furthermore, the seat height changes when the wheel track is adjusted, resulting in poor practicality.
A bushing limiting structure is designed, including a central tube, a bushing, a T-shaped piece, and a clamp. By setting a T-shaped notch at the end of the central tube, the bushing is fitted inside the central tube, the T-shaped piece is embedded in the stop groove of the bushing, and fixed with the clamp, the width of the wheelchair can be adjusted.
It achieves flexible adjustment of wheelchair width, has a simple structure, is easy to adjust, and is suitable for widespread use.
Smart Images
Figure CN224056207U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wheelchair technology, and in particular to a bushing limiting structure and a wheelchair. Background Technology
[0002] Wheelchairs typically have a fixed width, making it difficult to accommodate users of different body types. A Chinese utility model patent discloses a wheelchair with adjustable seat width, comprising a wheelchair body and a width adjustment device. The width adjustment device is mounted between two armrest assemblies, and longitudinal front wheel sleeves are symmetrically arranged at the front ends of the width adjustment device and the armrest assemblies. The front wheels are mounted on the outside of the front wheel sleeves, and the rear wheels are mounted on the lower backrest tubes. An adjustable-width tension backrest pad is provided between the upper parts of the two backrest tubes. The width adjustment device includes a connecting tube that is hinged to each other, a seat cushion tube extending along one end of the connecting tube, a pivot end extending along the other end of the connecting tube, a fixing tube placed between the backrest tube and the front wheel sleeve, and adjusting members symmetrically arranged at both ends of the pivot end. The other end of the adjusting member is mounted on the fixing tube.
[0003] However, while the above structure allows for wheelbase adjustment, it also alters the seat height; that is, a narrower wheelbase results in a higher seat height, and a wider wheelbase results in a lower seat height. This structure cannot control the wheelbase independently, making it less practical.
[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a bushing limiting structure and a wheelchair to solve the above problems. Utility Model Content
[0005] To overcome the shortcomings of the prior art, the present invention aims to provide a bushing limiting structure and a wheelchair.
[0006] To achieve the above and other related objectives, the technical solution provided by this utility model is: a bushing limiting structure, comprising:
[0007] A central tube, the end of which is provided with a T-shaped notch;
[0008] A bushing is fitted onto the inner side of the end of the central tube and is rotatably connected to the axle. The bushing is provided with a stop groove corresponding to the T-shaped notch.
[0009] The T-shaped component is fitted into the stop groove through the T-shaped notch;
[0010] A clamp is attached to the outer side of the end of the central tube and arranged corresponding to the T-shaped notch.
[0011] A preferred technical solution is that the stop groove is provided along the axial direction of the bushing.
[0012] A preferred technical solution is as follows: the T-shaped component is disposed in the stop groove, the top side of the T-shaped component forms an arc surface structure that matches the wall of the central tube, and the bottom side of the T-shaped component forms a planar structure that matches the bottom of the stop groove.
[0013] A preferred technical solution is that the outer wall of the bushing is provided with a scale arranged along the axial direction.
[0014] A wheelchair, including the aforementioned bushing limiting structure.
[0015] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:
[0016] This utility model proposes a bushing limiting structure and a wheelchair. By setting a T-shaped notch at the end of the central tube, the bushing is fitted onto the inner side of the end of the central tube. The T-shaped part is embedded in the stop groove on the outer wall of the bushing through the T-shaped notch, and then fixed by a clamp fitted onto the outer side of the end of the central tube. This structure can realize the adjustment of the length of the bushing extending out of the central tube, that is, the adjustment of the width of the wheelchair. It has the characteristics of simple structure and convenient adjustment, and is suitable for widespread use. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the bushing limiting structure involved in this utility model.
[0018] Figure 2 This is a schematic diagram of the central tube structure involved in this utility model.
[0019] Figure 3 This is a schematic diagram of the bushing structure involved in this utility model.
[0020] Figure 4 This is a schematic diagram of the T-shaped component structure involved in this utility model.
[0021] Figure 5 This is a schematic diagram of the clamp structure involved in this utility model. Detailed Implementation
[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0023] Please see Figures 1-5It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Example:
[0026] like Figures 1 to 5 As shown, according to an overall technical concept of this utility model, a bushing limiting structure is provided, comprising:
[0027] The central tube 1 has a T-shaped notch 11 at its end;
[0028] Bushing 2 is fitted onto the inner side of the end of the central tube 1 and is rotatably connected to the axle. Bushing 2 is provided with a stop groove 21 corresponding to the T-shaped notch 11.
[0029] T-shaped part 3, T-shaped part 3 is inserted into the stop groove 21 through T-shaped notch 11;
[0030] Clamp 4 is attached to the outer side of the end of the central tube 1 and is arranged corresponding to the T-shaped notch 11.
[0031] like Figures 1 to 5 As shown, in an exemplary embodiment of this utility model, the stop groove 21 is arranged along the axial direction of the bushing 2.
[0032] like Figures 1 to 5As shown, in an exemplary embodiment of this utility model, the T-shaped member 3 is disposed in the stop groove 21. The top side of the T-shaped member 3 forms an arc surface structure that matches the wall of the central tube 1, and the bottom side of the T-shaped member 3 forms a planar structure that matches the bottom of the stop groove 21.
[0033] like Figures 1 to 5 As shown, in an exemplary embodiment of this utility model, the outer wall of the bushing 2 is provided with a scale (not shown) arranged along the axial direction.
[0034] A wheelchair, including the aforementioned bushing limiting structure.
[0035] Therefore, this utility model has the following advantages:
[0036] This utility model proposes a bushing limiting structure and a wheelchair. By setting a T-shaped notch at the end of the central tube, the bushing is fitted onto the inner side of the end of the central tube. The T-shaped part is embedded in the stop groove on the outer wall of the bushing through the T-shaped notch, and then fixed by a clamp fitted onto the outer side of the end of the central tube. This structure can realize the adjustment of the length of the bushing extending out of the central tube, that is, the adjustment of the width of the wheelchair. It has the characteristics of simple structure and convenient adjustment, and is suitable for widespread use.
[0037] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A bushing stop structure, characterized by, The application relates to a shaft sleeve limiting structure, which comprises the following parts: a center pipe, the end of which is provided with a T-shaped notch; a shaft sleeve, which is sleeved on the inner side of the end of the center pipe and is rotationally connected with a vehicle axle, and is provided with a stop groove corresponding to the T-shaped notch; a T-shaped piece, which is embedded in the stop groove through the T-shaped notch; a hoop, which is arranged on the outer side of the end of the center pipe and corresponds to the T-shaped notch.
2. The bushing stop structure of claim 1, wherein: The stop groove is arranged along the axial direction of the shaft sleeve.
3. The bushing stop structure of claim 1, wherein: The T-shaped piece is arranged in the stop groove, the top side of the T-shaped piece forms an arc surface structure matched with the wall of the center pipe, and the bottom side of the T-shaped piece forms a plane structure matched with the bottom of the stop groove.
4. The bushing stop structure of claim 1, wherein: A scale is arranged on the outer wall of the shaft sleeve along the axial direction.
5. A wheelchair characterized by: The application further relates to a shaft sleeve limiting structure comprising any one of the shaft sleeve limiting structures according to claims 1-3.