Frame gravity center fine adjustment structure and wheelchair

Abstract

A frame gravity center fine adjustment structure comprises a seat frame, a wheel shaft and driving wheels, the driving wheels are arranged at the two ends of the wheel shaft in a rotating mode, the seat frame is arranged on the wheel shaft through a gravity center fine adjustment mechanism, and the gravity center fine adjustment mechanism is configured to be capable of adjusting the sitting height, the sitting depth and the sitting width of the seat frame on the wheel shaft. According to the scheme, the sitting height, sitting depth and sitting width of the seat frame on the wheel shaft can be adjusted according to the specific situation of a user, the user can adjust the sitting height through the lifting rod assembly, the sitting height can be increased for a tall person, and the legs can naturally stretch; for a short person, the sitting height is reduced, so that both feet can be in contact with the ground or the pedal more easily; the sitting depth can be changed by adjusting the position of the wedge-shaped sliding block in the wedge-shaped sliding groove, the comfortable sitting posture requirements of users of different body types are met, and the sitting comfort of the wheelchair user is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to a frame center of gravity fine-adjustment structure and a wheelchair. Background Technology

[0002] In actual wheelchair use scenarios, users vary significantly in height, body type, and usage habits. However, the seat frame of a traditional wheelchair is usually fixed in position on the axle, making it impossible to flexibly adjust the seat height, depth, and width. For taller users, a fixed low seat height may prevent their legs from extending comfortably, leading to leg fatigue and joint stress over time. For shorter users, an excessively deep seat may make it difficult to maintain a comfortable posture, and may pose a safety hazard when maneuvering the wheelchair as they may not be able to effectively contact the footrests or the ground.

[0003] Furthermore, the center of gravity of a wheelchair plays a crucial role in its stability and maneuverability. When the center of gravity of a wheelchair is not properly positioned, safety issues such as swaying and tipping over are likely to occur during operation, especially when traversing uneven surfaces or making turns. For example, a center of gravity that is too high can make the wheelchair easily lose balance when turning, while an improper forward or backward positioning of the center of gravity may cause the wheelchair to tilt forward or backward during acceleration or deceleration, affecting the user's safety and riding experience.

[0004] Existing wheelchairs, when faced with the diverse needs of different users, cannot easily and effectively adjust the position of the seat frame to optimize the wheelchair's center of gravity. This not only limits the wheelchair's applicability but also causes numerous inconveniences for users. Therefore, designing a structure and wheelchair that can flexibly adjust the seat frame position to achieve fine-tuning of the frame's center of gravity, addressing the shortcomings of existing technology, is of significant practical importance.

[0005] Therefore, in view of the shortcomings of existing technology, it is necessary to design a frame center of gravity adjustment structure and a wheelchair to solve the above problems. Utility Model Content

[0006] To overcome the shortcomings of the prior art, the purpose of this utility model is to provide a frame center of gravity adjustment structure and a wheelchair.

[0007] To achieve the above and other related objectives, the technical solution provided by this utility model is: a frame center of gravity fine-adjustment structure, including a seat frame, a wheel axle and a drive wheel, wherein the drive wheel is rotatably mounted on both ends of the wheel axle, and the seat frame is mounted on the wheel axle through a center of gravity fine-adjustment mechanism, wherein the center of gravity fine-adjustment mechanism is configured to adjust the seat height, seat depth and seat width of the seat frame on the wheel axle.

[0008] The preferred technical solution is as follows: the center of gravity fine-tuning mechanism consists of two sets of identical center of gravity fine-tuning devices. The center of gravity fine-tuning device includes a first clamp, a lifting rod assembly, a wedge-shaped slider, a wedge-shaped groove, and a second clamp. The first clamp is fixedly installed with the seat frame. The lifting rod assembly is vertically arranged and its top end is fixedly connected to the bottom side of the first clamp. The opening of the wedge-shaped groove is set downward and fixedly connected to the bottom end of the lifting rod assembly. The wedge-shaped slider is slidably disposed in the wedge-shaped groove and fixedly connected to the second clamp. The second clamp is fixedly installed with the wheel axle.

[0009] The preferred technical solution is as follows: the side wall of the wedge-shaped groove is provided with multiple sets of screw holes that connect to the inside of the groove along the guiding direction, and a tightening bolt is screwed into the screw hole.

[0010] The preferred technical solution is as follows: the lifting rod assembly consists of an outer tube, an inner tube, a locking ring, and multiple sets of shim rings. The top end of the outer tube is fixedly connected to the clamp, and the bottom end of the inner tube is fixedly connected to the wedge-shaped groove. The outer tube has a set of oppositely arranged positioning holes, and the inner tube has multiple sets of vertically spaced adjustment holes. The multiple sets of shim rings are fitted onto the inner tube according to the required installation height and are used to support the bottom end of the outer tube. The locking ring is fitted onto the outer tube and has a locking hole that is oppositely arranged. The locking hole, the positioning hole, and the adjustment hole are all matched.

[0011] A wheelchair, including the aforementioned frame center of gravity fine-tuning structure.

[0012] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0013] This utility model provides a frame center of gravity micro-adjustment structure and wheelchair, which can adjust the seat height, seat depth, and seat width of the seat frame on the wheel axle according to the user's specific situation. The user can adjust the seat height using the lifting rod assembly. For taller people, the seat height can be increased to allow the legs to stretch naturally; for shorter people, the seat height can be lowered so that the feet can more easily touch the ground or foot pedals. By adjusting the position of the wedge slider in the wedge groove, the seat depth can be changed to meet the comfortable sitting posture needs of users of different body types, greatly improving the riding comfort of wheelchair users. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the wheelchair structure involved in this utility model.

[0015] Figure 2 for Figure 1 Enlarged diagram of point A in the diagram.

[0016] Figure 3 This is an exploded view of the center of gravity fine-tuning device involved in this utility model. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1-3 It 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.

[0019] 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.

[0020] Example:

[0021] like Figures 1 to 2 As shown, according to an overall technical concept of this utility model, a frame center of gravity fine adjustment structure is provided, including a seat frame 1, a wheel axle 2 and a drive wheel 3. The drive wheel 3 is rotatably mounted on both ends of the wheel axle 2. The seat frame 1 is mounted on the wheel axle 2 through a center of gravity fine adjustment mechanism. The center of gravity fine adjustment mechanism is configured to adjust the seat height, seat depth and seat width of the seat frame 1 on the wheel axle 2.

[0022] like Figures 1 to 2As shown, in an exemplary embodiment of this utility model, the center of gravity fine-tuning mechanism consists of two sets of identical center of gravity fine-tuning devices. Each device includes a clamp 4, a lifting rod assembly 5, a wedge-shaped slider 6, a wedge-shaped groove 7, and a clamp 8. The clamp 4 is fixedly installed to the seat frame 1. The lifting rod assembly 5 is vertically arranged and its top end is fixedly connected to the bottom side of the clamp 4. The wedge-shaped groove 7 has its opening facing downwards and is fixedly connected to the bottom end of the lifting rod assembly 5. The wedge-shaped slider 6 is slidably disposed in the wedge-shaped groove 7 and fixedly connected to the clamp 8. The clamp 8 is fixedly installed to the wheel axle 2. It should be noted that in this application, seat width adjustment is achieved by controlling the distance between the two sets of center of gravity fine-tuning devices installed on the wheel axle 2.

[0023] like Figure 3 As shown, in an exemplary embodiment of this utility model, the sidewall of the wedge-shaped groove 7 is provided with multiple sets of screw holes communicating with the inside of the groove along the guiding direction, and a tightening bolt is screwed into the screw hole to fix the wedge-shaped slider 6.

[0024] like Figure 3 As shown in an exemplary embodiment of this utility model, the lifting rod assembly 5 consists of an outer tube 51, an inner tube 52, a locking ring 53, and multiple sets of raising rings 54. The top end of the outer tube 51 is fixedly connected to the clamp 4, and the bottom end of the inner tube 52 is fixedly connected to the wedge-shaped groove 7. The outer tube 51 has a set of oppositely arranged positioning holes, and the inner tube 52 has multiple sets of vertically spaced adjustment holes. The multiple sets of raising rings 54 are fitted onto the inner tube 52 according to the required installation height to support the bottom end of the outer tube 51. The locking ring 53 is fitted onto the outer tube 51 and has a locking hole that is oppositely arranged. The locking hole, positioning hole, and adjustment hole are all matched. The user can select the number of raising rings 54 according to the usage needs to adjust the seating height.

[0025] This application also relates to a wheelchair 100, including the aforementioned frame center of gravity fine-tuning structure.

[0026] Beneficial effects:

[0027] 1. Enhanced User Comfort: This invention utilizes a center-of-gravity fine-tuning mechanism to adjust the seat height, depth, and width on the wheel axle according to the user's specific needs. For example, the user can adjust the seat height using the lifting rod assembly; taller individuals can increase the seat height to allow their legs to extend naturally, while shorter individuals can lower the seat height to make it easier for their feet to reach the ground or footrests. By adjusting the position of the wedge-shaped slider within the wedge-shaped groove, the seat depth can be altered to meet the comfortable sitting posture needs of users of different body types, significantly improving the riding comfort of wheelchair users.

[0028] 2. Enhanced Wheelchair Stability: The center-of-gravity adjustment mechanism allows for flexible adjustment of the seat frame position, enabling users to precisely adjust the wheelchair's center of gravity according to their weight distribution and usage scenario. For example, when traveling on rough roads, the center of gravity can be lowered and adjusted to a more suitable position, reducing the risk of swaying and tipping during bumpy rides. During steering maneuvers, a proper center-of-gravity position makes steering smoother, improving the wheelchair's stability in various road conditions and ensuring user safety.

[0029] 3. Improved Wheelchair Versatility: Given the significant differences in body characteristics among users, traditional fixed-structure wheelchairs often fail to meet the needs of everyone. However, the micro-adjustment structure of this invention's frame center of gravity allows the wheelchair to adapt to users of various heights and body types. Whether adult or child, overweight or underweight, users can adjust the seat height, seat depth, and seat width to find the most suitable wheelchair configuration, greatly improving its versatility and expanding its applicability.

[0030] 4. Simple and Flexible Operation: The components of this center-of-gravity fine-tuning structure are ingeniously designed and easy to operate. For example, the wedge-shaped slider and wedge-shaped groove work together to adjust the seat depth with simple sliding, and the tightening bolts on the side wall of the wedge-shaped groove can fix the wedge-shaped slider after adjustment, ensuring stable position. The lifting rod assembly, through the cooperation of the inner tube, outer tube, and height-adjusting ring, allows for convenient adjustment of the seat height, and the locking ring design ensures that the adjusted height is firmly maintained. Users can flexibly adjust it at any time according to actual needs.

[0031] 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 frame center of gravity fine-tuning structure, characterized in that: The seat includes a seat frame, axle, and drive wheels. The drive wheels are rotatably mounted on both ends of the axle. The seat frame is mounted on the axle via a center-of-gravity fine-tuning mechanism, which is configured to adjust the seat height, seat depth, and seat width of the seat frame on the axle.

2. The vehicle frame gravity center fine adjustment structure according to claim 1, characterized by: The center of gravity fine-tuning mechanism consists of two sets of identical center of gravity fine-tuning devices. Each center of gravity fine-tuning device includes a first clamp, a lifting rod assembly, a wedge-shaped slider, a wedge-shaped groove, and a second clamp. The first clamp is fixedly installed to the seat frame. The lifting rod assembly is vertically arranged and its top end is fixedly connected to the bottom side of the first clamp. The opening of the wedge-shaped groove is set downward and fixedly connected to the bottom end of the lifting rod assembly. The wedge-shaped slider is slidably disposed in the wedge-shaped groove and fixedly connected to the second clamp. The second clamp is fixedly installed to the wheel axle.

3. The vehicle frame center of gravity fine adjustment structure according to claim 2, characterized by: The wedge-shaped groove has multiple sets of screw holes connected to the inside of the groove along the guiding direction on its side wall, and a tightening bolt is screwed into the screw hole.

4. The vehicle frame center of gravity fine adjustment structure according to claim 2, characterized by: The lifting rod assembly consists of an outer tube, an inner tube, a locking ring, and multiple sets of raising rings. The top end of the outer tube is fixedly connected to the clamp, and the bottom end of the inner tube is fixedly connected to the wedge-shaped groove. The outer tube has a set of oppositely arranged positioning holes, and the inner tube has multiple sets of vertically spaced adjusting holes. The multiple sets of raising rings are fitted onto the inner tube according to the required installation height to support the bottom end of the outer tube. The locking ring is fitted onto the outer tube and has a oppositely arranged locking hole. The locking hole, the positioning hole, and the adjusting hole are all matched.

5. A wheelchair characterized by: Includes the frame center of gravity fine-tuning structure as described in any one of claims 1-4.

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