Disassembly-free anti-toppling wheel structure

Abstract

The utility model discloses a disassembly-free type anti-tilting wheel structure which comprises wheels installed on a frame, the wheels are rotationally arranged on the two sides of the frame respectively, a using groove and a containing groove are formed in the frame respectively and used for lowering the anti-tilting wheel to prevent tilting and lifting and containing the anti-tilting wheel, a rotary connecting shaft is arranged in the center of each wheel in a penetrating mode, and the rotary connecting shafts are connected with the wheels. A connecting plate is arranged outside the rotary connecting shaft in a penetrating and sleeving mode, a limiting spring is arranged at the end, close to the frame, of the connecting plate in a penetrating mode, a rotating shaft is arranged in the middle of the limiting spring in a sleeving mode, the limiting spring and the rotating shaft are both perpendicularly connected with the frame, and the same limiting shaft is arranged at the end of the rotating shaft and the end of the connecting plate; the wheel is located on the rear side of the wheel, and the anti-inclination included angle between the wheel and the ground is 15 degrees. The anti-toppling wheel structure is free of disassembly, simple in structure and convenient to use and store, and the protection effect of the anti-toppling wheel on the wheelchair is improved.

Description

Technical Field

[0001] This utility model relates to a wheelchair anti-tilt wheel, and more particularly to an anti-tilt wheel structure that does not require disassembly. Background Technology

[0002] As an assistive tool for people with mobility impairments, wheelchairs are designed with their structure and application scenarios in mind to enhance safety and prevent falls. In actual use, wheelchairs encounter situations such as going up and down slopes, turning, and traversing uneven surfaces, all of which can cause them to tip backward. Therefore, to increase safety, anti-tipping wheels are installed on wheelchairs to provide protection for the user.

[0003] Currently, most anti-roll wheels used in wheelchairs employ outward-expanding brackets as the connection point. The anti-roll wheels are installed at different lengths on the brackets to prevent the wheelchair from tipping over. However, this type of anti-roll wheel requires disassembly from the bracket for both use and packaging, making it inconvenient for storage. Therefore, it is necessary to design a non-disassembly anti-roll wheel structure that is simple in structure, easy to store, and improves the protective strength of the anti-roll wheel structure for wheelchairs. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art, the purpose of this utility model is to provide a non-disassembly anti-tilt wheel structure, which achieves the purpose of simple structure, no disassembly required, convenient use and storage, and high protection for wheelchairs.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A non-removable anti-roll wheel structure includes wheels mounted on a frame, with wheels rotatably mounted on both sides of the frame. The frame has a usage slot and a storage slot for lowering the anti-roll wheel to prevent rollover and for raising and storing it. A pivot shaft passes through the center of each wheel, and a connecting plate is sleeved around the pivot shaft. A limit spring passes through one end of the connecting plate near the frame, and a rotating shaft is sleeved in the middle of the limit spring. Both the limit spring and the rotating shaft are perpendicularly connected to the frame. The ends of the rotating shaft and the connecting plate share the same limit shaft for angular rotation of the anti-roll wheel.

[0007] Preferably, the wheel is located behind the wheel, and the anti-tipping angle between the wheel and the wheel and the ground is 15°.

[0008] Preferably, the wheel rotates around the swivel shaft, the swivel shaft is fitted with a washer on its outside, and the washer is located inside the wheel. The swivel shaft and the end face of the wheel are clamped together with a washer ring.

[0009] Preferably, the wheel is made of silicone rubber, and the washer and gasket are made of iron.

[0010] Preferably, the wheel has an internal ring that runs through it, and the internal ring has multiple recesses evenly distributed around its periphery. The internal ring is made of metal and is used for high-strength support of the wheel.

[0011] Preferably, the outer periphery of the wheel is provided with multiple anti-slip blocks, and the outer surface of the wheel and the anti-slip blocks is covered with a frosted coating for anti-slip treatment of the wheel.

[0012] Preferably, the end of the connecting plate is provided with a rotating hole for the limiting spring to pass through, and the end of the limiting spring is fixedly connected to the connecting plate. The connecting plate rotates around the rotating axis through the limiting spring, so as to engage the connecting plate with the use slot and the storage slot respectively.

[0013] Preferably, the screw diameter of the limiting shaft is larger than the inner diameter of the rotating hole, and the limiting shaft is connected to the rotating shaft through the hole for limiting the connection plate.

[0014] Preferably, the storage slot and the usage slot are located on the upper and lower sides of the limiting shaft, respectively, and both the usage slot and the storage slot are connected to the connecting plate through the shaft.

[0015] Compared with existing technologies, the anti-tilt wheel structure provided by this utility model is simple, requires no disassembly, is convenient to use and store, and provides a high level of protection for wheelchairs. Specifically, a connecting plate is set between the wheel and the frame, which facilitates the rotational connection of the wheel to the frame. The connection between the connecting plate and the frame is achieved by a limiting spring, making it easy for the user to operate the connecting plate to separate it from the frame. Then, by rotating the connecting plate around the rotation axis, it can be limited in the use slot, using the 15° angle formed between the wheel and the ground to prevent the wheelchair from tipping over; it can also be limited in the storage slot, which facilitates the storage of the anti-tilt wheel structure and the subsequent packaging and use of the wheelchair.

[0016] Furthermore, the use of washers and rings increases the stability of the connection between the wheel and the swivel shaft; the use of built-in rings inside the wheel increases the wheel's support strength for the wheelchair; and the use of anti-slip blocks and abrasive coatings increases the friction on the outer surface of the wheel, preventing wheel slippage, increasing the anti-roll wheel's grip on the ground, and improving the anti-roll wheel's support stability. These features are highly beneficial for the application of anti-roll wheel structures in wheelchairs.

[0017] It should be understood that the general descriptions and details herein are exemplary and illustrative only and are not intended to limit this disclosure.

[0018] This application provides an overview of various implementations or exemplary embodiments of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the non-disassembly anti-tilt wheel structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the frame, wheels, and rims in the non-disassembly anti-roll wheel structure of this utility model;

[0021] Figure 3 This is a partial structural diagram of the wheel and frame in the non-disassembly anti-roll wheel structure of this utility model;

[0022] Figure 4 This is a partial exploded view of the wheel and connecting plate in the non-disassembly anti-tilt wheel structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the wheel structure in the non-disassembly anti-tilt wheel structure of this utility model;

[0024] Figure 6 This is a partial structural cross-sectional view of the wheel in the non-disassembly anti-tilt wheel structure of this utility model.

[0025] Key reference numerals:

[0026] 1. Frame; 2. Wheel; 3. Wheel; 4. Washer; 5. Washer ring; 6. Screw-in shaft; 7. Internal ring; 8. Recess; 9. Anti-slip block; 10. Frosted coating; 11. Connecting plate; 12. Rotation hole; 13. Limiting spring; 14. Rotation shaft; 15. Limiting shaft; 16. Usage slot; 17. Storage slot. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. Note: The described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0028] As attached Figure 1 To be continued Figure 6As shown, the non-removable anti-tilt wheel structure provided by the embodiment of this utility model allows the wheelchair to be propelled by the wheels 2 on both sides of the frame 1 during use. The wheels 2 can rotate on the frame 1 to move the position of the wheelchair. Then, the wheels 3 on the frame 1 can serve as anti-tilt wheels for the wheelchair. When the wheelchair is used in scenarios such as going uphill or downhill, turning, or on uneven roads, the wheels 3 can provide anti-tilt treatment to ensure the safety of the user riding in the wheelchair. To facilitate the use of the anti-roll wheel, it can be designed as a non-disassembly type, making it convenient for use and storage. A swivel shaft 6 is inserted through the center of the wheel 3, concentrically positioned with the wheel 3. A connecting plate 11 is then fitted through the outside of the swivel shaft 6, serving as a connector between the wheel 3 and the frame 1. Next, a limiting spring 13 is inserted through the end of the connecting plate 11 near the frame 1, and a rotating shaft 14 is fitted around the middle of the limiting spring 13. Both the limiting spring 13 and one end of the rotating shaft 14 are perpendicularly connected to the frame 1. The through-hole connection between the connecting plate 11 and the rotating shaft 14 allows the connecting plate 11 to drive the wheel 3 to rotate around the swivel shaft 6. Finally, the same limiting shaft 15 is installed at the other end of the rotating shaft 14 and the connecting plate 11 to limit… The positioning shaft 15 can restrict the connecting plate 11 between the frame 1 and the positioning shaft 15. By compressing the limiting spring 13, the connecting plate 11 can move laterally, adjusting its position to facilitate the rotation of the anti-roll wheel. Finally, when the anti-roll wheel is used in a wheelchair, a usage slot 16 and a storage slot 17 can be opened on the upper and lower sides of the rotating shaft 14 at the position of the frame 1 behind the wheel 2, respectively, as a limiting structure between the connecting plate 11 and the frame 1. When the connecting plate 11 rotates to the usage slot 16 and the storage slot 17, the limiting spring 13 can be used to lock it in the frame 1. When the connecting plate 11 is locked into the usage slot 16, the anti-roll wheel is in a lowered state, playing an anti-roll role; when the connecting plate 11 is locked into the storage slot 17, the anti-roll wheel is in an raised and stored state.

[0029] It is worth noting that, in order to achieve anti-tipping for the wheelchair with three pairs of wheels, such as Figure 2 and 3 As shown, in some embodiments, the wheel 3 needs to be placed on the rear side of the wheel 2, and the straight line containing the wheel 3 and the lower surface of the wheel 2 forms a 15° angle with the ground. By placing the wheel 3 at this position, the wheelchair can be tilted backward more safely, improving the anti-tipping effect of the structure on the wheelchair.

[0030] Secondly, such as Figure 3 and 6As shown, during use, the wheel 3 can rotate around the swivel shaft 6 at an angle, providing favorable conditions for lowering and raising the wheel 3. Next, a washer 4 can be fitted onto the outside of the swivel shaft 6. This washer 4 can penetrate the wheel 3, with a portion of the washer 4 located inside the wheel 3. This provides wear-resistant treatment to the contact edges between the swivel shaft 6 and the wheel 3. Furthermore, a washer ring 5 is clamped between the end faces of the swivel shaft 6 and the wheel 3 to provide horizontal wear-resistant protection for the wheel 3, improving the connection stability between the wheel 3 and the swivel shaft 6.

[0031] Furthermore, to improve the performance of wheel 3, it can be made of silicone rubber material produced by combining silica and rubber. Both washer 4 and washer ring 5 can be made of iron. By utilizing the material properties of silicone rubber, the grip of wheel 3 on wet and icy roads can be enhanced, the service life of wheel 3 can be increased, and the anti-roll wheel structure can be improved to support the wheelchair.

[0032] In some embodiments, the stability of the anti-rollover wheel structure for the wheelchair can be improved by supplementing the strength of wheel 3, such as... Figure 6 As shown, an internal ring 7 can be installed through the inside of the wheel 3. Multiple recesses 8 can be evenly arranged on the periphery of the internal ring 7. By setting the recesses 8, the internal ring 7 can be designed as a toothed ring, which increases the integrity of the internal ring 7 and the wheel 3. The use of metal material for the internal ring 7 can increase the support strength of the wheel 3 for the wheelchair and improve the protective effect of the anti-rollover wheel on the wheelchair.

[0033] By setting multiple anti-slip blocks 9 on the outer periphery of the wheel 3, the use of the anti-slip blocks 9 on the outside of the wheel 3 increases the friction between the wheel 3 and the ground, improving the anti-slip performance; and by covering the outside of the wheel 3 and the anti-slip blocks 9 with a frosted coating 10, the overall surface roughness of the wheel 3 can be increased, the water film can be broken, and the wheel 3 can be prevented from slipping, so that the anti-tipping structure can prevent the wheelchair from tipping over more quickly.

[0034] To facilitate the use of wheel 3 in both states, such as Figure 4 As shown, in some embodiments, a rotating hole 12 for the limiting spring 13 to pass through can be opened at the end of the connecting plate 11, facilitating the passing of the limiting spring 13 through the connecting plate 11. Then, one end of the limiting spring 13 is fixed to the connecting plate 11. The connecting plate 11 is adjusted horizontally by the compression change of the limiting spring 13, providing favorable conditions for the separation of the connecting plate 11 from the frame 1. This allows the connecting plate 11 to rotate around the rotating axis 14 via the limiting spring 13, facilitating the respectively engaging of the connecting plate 11 with the use slot 16 and the storage slot 17. Utilizing the elasticity of the limiting spring 13, it is limited in the use slot 16 and the storage slot 17, increasing the connection stability between the connecting plate 11 and the frame 1.

[0035] Furthermore, such as Figure 4As shown, in some embodiments, the diameter of the screw head of the limiting shaft 15 is larger than the inner diameter of the rotating hole 12. The limiting shaft 15 is connected to the rotating shaft 14 through the limiting shaft 15, which can limit the connecting plate 11 between the screw head of the limiting shaft 15 and the bracket, so as to facilitate the angle adjustment of the connecting plate 11 and limit the connection plate 11.

[0036] Finally, as Figure 3 As shown, in some embodiments, the storage slot 17 and the usage slot 16 are respectively set on the upper and lower sides of the limiting shaft 15, and the connecting plate 11 is connected to the usage slot 16 or the storage slot 17 through the connection plate 11, which facilitates the separation of the connecting plate 11 from the frame 1 and the use of the limiting plate.

[0037] Of course, the above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A non-removable anti-roll wheel structure, comprising wheels (3) mounted on a frame (1), with wheels (2) rotatably mounted on both sides of the frame (1), characterized in that: The frame (1) is provided with a usage slot (16) and a storage slot (17) for lowering the anti-roll wheel to prevent it from tilting and for raising and storing the anti-roll wheel. A swivel shaft (6) is provided through the center of the wheel (3). A connecting plate (11) is provided through the outside of the swivel shaft (6). A limit spring (13) is provided through the end of the connecting plate (11) near the frame (1). A rotating shaft (14) is provided in the middle of the limit spring (13). The limit spring (13) and the rotating shaft (14) are both vertically connected to the frame (1). The ends of the rotating shaft (14) and the connecting plate (11) are provided with the same limit shaft (15) for the angle rotation of the anti-roll wheel.

2. The non-disassembly anti-tilt wheel structure as described in claim 1, characterized in that, The wheel (3) is located behind the wheel (2), and the anti-tilt angle between the wheel (3) and the wheel (2) and the ground is 15°.

3. The non-disassembly-free anti-tilt wheel structure as described in claim 1, characterized in that, The wheel (3) rotates around the swivel shaft (6). A washer (4) is fitted on the outside of the swivel shaft (6) and the washer (4) is located inside the wheel (3). A washer (5) is sandwiched between the end face of the swivel shaft (6) and the wheel (3).

4. The non-disassembly anti-tilt wheel structure as described in claim 3, characterized in that, The wheel (3) is made of silicone rubber, and the washer (4) and the washer ring (5) are both made of iron.

5. The non-disassembly-free anti-tilt wheel structure as described in claim 1, characterized in that, The wheel (3) has an internal ring (7) that runs through it. The inner ring (7) has multiple recesses (8) evenly arranged on its periphery. The internal ring (7) is made of metal and is used for high-strength support of the wheel (3).

6. The non-disassembly-free anti-tilt wheel structure as described in claim 1, characterized in that, The outer periphery of the wheel (3) is provided with a plurality of anti-slip blocks (9), and the outer surface of the wheel (3) and the anti-slip blocks (9) is covered with a frosted coating (10) for anti-slip treatment of the wheel (3).

7. The non-disassembly anti-tilt wheel structure as described in claim 1, characterized in that, The end of the connecting plate (11) is provided with a rotating hole (12) through which the limiting spring (13) passes, and the end of the limiting spring (13) is fixedly connected to the connecting plate (11). The connecting plate (11) rotates around the rotating shaft (14) through the limiting spring (13) so that the connecting plate (11) can be engaged with the use slot (16) and the storage slot (17) respectively.

8. The non-disassembly-free anti-tilt wheel structure as described in claim 7, characterized in that, The screw diameter of the limiting shaft (15) is larger than the inner diameter of the rotating hole (12). The limiting shaft (15) and the rotating shaft (14) are connected through each other and used for limiting the connection plate (11).

9. The non-disassembly anti-tilt wheel structure as described in claim 1, characterized in that, The storage slot (17) and the use slot (16) are located on the upper and lower sides of the limiting shaft (15), respectively. The use slot (16) and the storage slot (17) are both connected to the connecting plate (11) through the shaft.

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