Folding structure of electric bicycle
By improving the folding structure of the electric bicycle, using components such as worm gears and limit blocks, the problem of stress concentration of cylindrical hinged folding joints is solved, structural stability and load-bearing capacity are improved, and the safety of riding and folding is ensured, and it is easy to carry and store.
Patent Information
- Application Number
- CN202422901730.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-11-27
AI Technical Summary
When existing electric bicycles use cylindrical hinged folding joints, the stress at the folding area is concentrated, affecting the support strength and reliability.
The folding structure consisting of components such as worm, worm gear, screw rod and limit block is adopted. Through the meshing transmission of the worm and worm gear, combined with the limiting function of the limit block and limit ring, the stable rotation of the screw rod is ensured, the sliding connection of the support cylinder is enhanced, the stable support between the connecting pipes is enhanced, and the stable folding of the connecting pipe is achieved through the coordination of the limit plate and the spring.
It improves the structural stability and load-bearing capacity of the electric bicycle during riding, reduces safety risks, ensures the stability of the folding state, and is easy to carry and store.
Smart Images
Figure CN223086195U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric bicycles, in particular to a folding structure of an electric bicycle. Background Art
[0002] In cities, the population is dense and the living space is relatively small. Whether it is an apartment, a dormitory or a house in some old communities, there is not enough space to store large transportation tools. The folding structure of an electric bicycle enables the vehicle to be folded up when not in use, greatly reducing the floor area and facilitating the user to store it indoors or in a narrow space. For example, it can be easily placed on a balcony, in a corner of a stairwell or in a corner of a room, etc.
[0003] In the prior art, a cylindrical hinge type folding joint is usually used as a folding component. When the vehicle is stressed during riding, part of the stress will concentrate on the cylindrical hinge type folding joint. This makes the stress point relatively concentrated and the support not stable enough during riding, and it is easy to generate stress concentration at the folding part, thereby affecting the overall support strength and reducing the reliability of the electric bicycle. Summary of the Utility Model
[0004] In order to make up for the above deficiencies, the utility model provides a folding structure of an electric bicycle, aiming to improve the problem that in the prior art, a cylindrical hinge type folding joint is usually used as a folding component, which is easy to generate stress concentration at the folding part, thereby affecting the overall support strength and reducing the reliability of the electric bicycle.
[0005] To achieve the above object, the utility model provides the following technical solutions:
[0006] A folding structure of an electric bicycle, including a first connecting pipe and a second connecting pipe. A worm is rotatably connected inside the second connecting pipe. A hand wheel is fixedly connected to the outer wall of the worm. A worm gear is meshed with the outer wall of the worm. A lead screw is fixedly connected to the inner wall of the worm gear. A first limiting block is fixedly connected to the outer wall of the lead screw. A limiting ring is rotatably connected to the outer wall of the first limiting block. The outer wall of the limiting ring is fixedly connected to the inner wall of the second connecting pipe. A support cylinder is slidably connected to the inner wall of the second connecting pipe. An internally threaded slider is fixedly connected to the inner wall of the support cylinder. The outer wall of the lead screw is threadedly connected to the inner wall of the internally threaded slider. A second limiting block is fixedly connected to the outer wall of the lead screw. A limiting post is fixedly connected to the outer wall of the support cylinder. A limiting groove is formed in the inner wall of the second connecting pipe. The outer wall of the limiting post is slidably connected to the inner wall of the limiting groove. A folding assembly is arranged on the outer wall of the second connecting pipe.
[0007] Preferably, the folding assembly includes a first fixing block, the outer wall of the first fixing block is fixedly connected to the outer wall of the second connecting pipe, the outer wall of the first fixing block is fixedly connected with a fixing cylinder, the inner wall of the fixing cylinder is fixedly connected with a fixing column, the outer wall of the fixing column is rotatably connected with a second fixing block, the outer wall of the second fixing block is fixedly connected to the outer wall of the first connecting pipe, and one end of the second connecting pipe close to the first fixing block is attached to one end of the first connecting pipe close to the second fixing block.
[0008] Preferably, a first cylinder is fixedly connected to the outer wall of the second connecting pipe, and a limiting piece is slidably connected to the inner wall of the first cylinder.
[0009] Preferably, one end of the limiting piece away from the second connecting pipe is fixedly connected with a cylinder, and a clamping block is fixedly connected to the outer wall of the cylinder.
[0010] Preferably, a second cylinder is fixedly connected to the inside of the first connecting pipe.
[0011] Preferably, a cylindrical groove is formed on the outer wall of the second cylinder, and a clamping groove is formed on the inner wall of the second cylinder.
[0012] Preferably, the outer wall of the clamping block is slidably connected to the inner wall of the cylindrical groove, and the outer wall of the clamping block is slidably connected to the inner wall of the clamping groove.
[0013] Preferably, one end of a spring is fixedly connected to the inner wall of the second cylinder, the other end of the spring is fixedly connected with a resisting block, and one end of the resisting block away from the spring is attached to one end of the cylinder away from the limiting piece.
[0014] The utility model has the following beneficial effects:
[0015] 1. In the utility model, by rotating the hand wheel, the lead screw rotates inside the inner thread slider to move the support cylinder and slide it into the inner wall of the first connecting pipe, forming a firm support for the connection between the first connecting pipe and the second connecting pipe, so as to enhance the structural stability and improve the bearing capacity, reduce the potential safety hazards during riding, and improve the reliability of the electric bicycle.
[0016] 2. In the utility model, by pulling the cylinder, the clamping block slides through the inner wall of the cylindrical groove and enters the inside of the second cylinder. Continuing to move the cylinder causes the cylinder to exert pressure on the resisting block and move, thereby compressing the spring to contract. Then, the cylinder is rotated by 90 degrees and no more force for moving the cylinder is applied. Then, the spring drives the cylinder to move in the reverse direction and drives the clamping block to actively slide into the inner wall of the clamping groove, completing the fixation of the folded state of the first connecting pipe and the second connecting pipe, so as to achieve the effect of maintaining the fixed folded state, which is beneficial to convenient carrying and storage and reduces the risks during transportation. Description of the Drawings
[0017] Figure 1The perspective view of the folding structure of the electric bicycle proposed by the present utility model;
[0018] Figure 2 The schematic cross-sectional view of the internal structure of the second connecting pipe of the folding structure of the electric bicycle proposed by the present utility model;
[0019] Figure 3 The schematic partial structure view of the limiting column of the folding structure of the electric bicycle proposed by the present utility model;
[0020] Figure 4 The schematic partial structure view of the first cylinder of the folding structure of the electric bicycle proposed by the present utility model;
[0021] Figure 5 The schematic cross-sectional view of the internal structure of the second cylinder of the folding structure of the electric bicycle proposed by the present utility model.
[0022] Legend description:
[0023] 1. First connecting pipe; 2. Second connecting pipe; 3. Worm; 4. Handwheel; 5. Worm gear; 6. Lead screw; 7. First limiting block; 8. Limiting ring; 9. Internal thread slider; 10. Support cylinder; 11. Second limiting block; 12. First fixing block; 13. Fixed cylinder; 14. Fixed column; 15. Second fixing block; 16. First cylinder; 17. Limiting piece; 18. Cylinder; 19. Clamping block; 20. Second cylinder; 21. Cylinder groove; 22. Card slot; 23. Spring; 24. Block; 25. Limiting groove; 26. Limiting column. Specific implementation manners
[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0025] Refer to Figure 1 - Figure 3The utility model provides an embodiment: a folding structure of an electric bicycle, comprising a connecting tube 1 and a connecting tube 2, wherein a worm 3 is rotatably connected inside the connecting tube 2, a hand wheel 4 is fixedly connected to the outer wall of the worm 3, a worm wheel 5 is meshingly connected to the outer wall of the worm 3, a screw 6 is fixedly connected to the inner wall of the worm wheel 5, the outer wall of the screw 6 is fixedly connected to a limiting block 7, the outer wall of the limiting block 7 is rotatably connected to a limiting ring 8, the outer wall of the limiting ring 8 is fixedly connected to the inner wall of the connecting tube 2, the inner wall of the connecting tube 2 is slidably connected to a supporting tube 10, the inner wall of the supporting tube 10 is fixedly connected to an internally threaded slider 9, the outer wall of the screw 6 is threadedly connected to the inner wall of the internally threaded slider 9, the outer wall of the screw 6 is fixedly connected to the limiting block 11, the outer wall of the support tube 10 is fixedly connected to the limiting column 26, the inner wall of the connecting tube 2 is provided with a limiting groove 25, the outer wall of the limiting column 26 is slidably connected to the inner wall of the limiting groove 25, and the outer wall of the connecting tube 2 is provided with a folding component; the folding component includes a fixed block 12, the outer wall of the fixed block 12 is fixedly connected to the outer wall of the connecting tube 2, the outer wall of the fixed block 12 is fixedly connected to the fixing tube 13, the inner wall of the fixing tube 13 is fixedly connected to the fixing column 14, the outer wall of the fixing column 14 is rotatably connected to the fixing block 2 15, the outer wall of the fixing block 2 15 is fixedly connected to the outer wall of the connecting tube 1, and the end of the connecting tube 2 close to the fixing block 12 is in contact with the end of the connecting tube 1 close to the fixing block 2 15;
[0026] Specifically, when the worm wheel 5 rotates to drive the screw rod 6 to rotate, the screw rod 6 will drive the limit block 1 7 to rotate on the inner wall of the limit ring 8. The limit ring 8 can limit the limit block 1 7 and then the screw rod 6, which can ensure that the screw rod 6 remains in a fixed position without displacement during rotation. The mutual cooperation between the worm 3 and the worm wheel 5 makes the screw rod 6 have a certain self-locking property, that is, the worm wheel 5 can only be driven to rotate by the worm 3, but not by the worm wheel 5, which can ensure stability during use. The limit block 2 11 can limit the screw rod 6 and then limit the support tube 10. The function of the positioning is to prevent the screw rod 6 from sliding out from the inner wall of the internal thread slider 9 through the limit block 21, thereby causing the support tube 10 to be out of control. When the screw rod 6 rotates to prompt the internal thread slider 9 to drive the support tube 10 to slide into the inner wall of the connecting tube 1, when the force is applied, the support tube 10 will be subjected to the pressure from the connecting tube 1 and the connecting tube 2, and will not transfer all the force to the folding assembly, thereby enhancing the structural stability and improving the bearing capacity. The support tube 10 slides on the inner wall of the connecting tube 22 and drives the limit column 26 to slide on the inner wall of the limit groove 25 opened on the inner wall of the connecting tube 22. The limit column 26 can play a role in limiting the support tube 10.
[0027] Reference Figure 1 , Figure 4 and Figure 5, a cylinder one 16 is fixedly connected to the outer wall of the connecting pipe two 2, and a limiting piece 17 is slidably connected to the inner wall of the cylinder one 16; one end of the limiting piece 17 away from the connecting pipe two 2 is fixedly connected to a cylinder 18, and a clamping block 19 is fixedly connected to the outer wall of the cylinder 18; a cylinder two 20 is fixedly connected to the inside of the connecting pipe one 1; a cylinder groove 21 is formed in the outer wall of the cylinder two 20, and a clamping groove 22 is formed in the inner wall of the cylinder two 20; the outer wall of the clamping block 19 is slidably connected to the inner wall of the cylinder groove 21, and the outer wall of the clamping block 19 is slidably connected to the inner wall of the clamping groove 22;
[0028] Specifically, the connecting pipe two 2 can play a role in fixing the cylinder one 16, and the limiting piece 17 can play a role in limiting the cylinder 18, that is, when the cylinder 18 moves to drive the limiting piece 17 to slide on the inner wall of the cylinder one 16, the limiting piece 17 can prevent the cylinder 18 from sliding out of the inner wall of the cylinder one 16. The cylinder 18 can play a role in fixing the clamping block 19. The cylinder groove 21 can provide a passing space for the clamping block 19, and the clamping groove 22 is used to provide a clamping space for the clamping block 19. When the cylinder 18 drives the clamping block 19 to slide into the inner wall of the clamping groove 22, it can ensure that the cylinder 18 will not rotate.
[0029] Refer to Figure 1 , Figure 4 and Figure 5 , one end of a spring 23 is fixedly connected to the inner wall of the cylinder two 20, the other end of the spring 23 is fixedly connected to a resisting block 24, and one end of the resisting block 24 away from the spring 23 is in contact with one end of the cylinder 18 away from the limiting piece 17;
[0030] Specifically, the spring 23 mainly plays a role of rebounding and resetting. When the spring 23 is no longer stressed, it will rebound and reset to push the resisting block 24 to reset, drive the cylinder 18 to move in the reverse direction, and drive the clamping block 19 to actively slide into the inner wall of the clamping groove 22.
[0031] Working principle: When the structure is unfolded from the folded state to the use state, rotate the connecting pipe 1 to cause the connecting pipe 1 to drive the fixed block 2 to rotate on the outer wall of the fixed column 14 until the end of the connecting pipe 1 close to the fixed block 2 fits with the end of the connecting pipe 2 close to the fixed block 1. Then rotate the handwheel 4 to cause the worm 3 to rotate inside the connecting pipe 2 to drive the worm gear 5 to rotate, so that the lead screw 6 rotates to drive the limiting block 1 to rotate on the inner wall of the limiting ring 8 and at the same time rotate on the inner wall of the internally threaded slider 9. When the lead screw 6 rotates on the inner wall of the internally threaded slider 9, it causes the internally threaded slider 9 to move, thereby driving the support cylinder 10 to slide on the inner wall of the connecting pipe 2 and at the same time driving the limiting column 26 to slide on the inner wall of the limiting groove 25 opened on the inner wall of the connecting pipe 2, and causing the support cylinder 10 to slide into the inner wall of the connecting pipe 1 until it reaches the inner wall of the connecting pipe 1, so as to form a firm support for the connection between the connecting pipe 1 and the connecting pipe 2, thereby achieving the effect of enhancing the structural stability and improving the bearing capacity, reducing the safety hazards during riding, improving the reliability of the electric bicycle. When folding the structure, keep the position of the connecting pipe 1 unchanged, and then rotate the connecting pipe 2 to drive the fixed block 1 to rotate and cause the fixed block 2 to rotate passively on the outer wall of the fixed column 14. When the connecting pipe 2 rotates to be horizontally parallel to the connecting pipe 1, pull the cylinder 18 to drive the limiting piece 17 to slide down on the inner wall of the cylinder 1, so that the clamping block 19 moves. During the movement of the clamping block 19, it will slide over the inner wall of the cylinder groove 21 and enter the inside of the cylinder 2. During this process, the end of the cylinder 18 close to the clamping block 19 will fit with the end of the abutting block 24 away from the spring 23. Then continue to move the cylinder 18 to cause the cylinder 18 to exert pressure on the abutting block 24 to move, thereby pressing the spring 23 to contract under force. After that, rotate the cylinder 18 by 90 degrees and then stop applying the force to move the cylinder 18, so that the spring 23 no longer exerts force to push the abutting block 24 to reset, driving the cylinder 18 to move in the reverse direction and driving the clamping block 19 to actively slide into the inner wall of the card slot 22, completing the fixation of the folded state of the connecting pipe 1 and the connecting pipe 2, thereby achieving the effect of maintaining the fixed folded state, which is beneficial to easy carrying and storage and reducing the risk during transportation.
[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. Electric bicycle folding structure, comprising a first connecting pipe (1) and a second connecting pipe (2), characterized in that: A worm (3) is rotatably connected inside the second connecting pipe (2). A handwheel (4) is fixedly connected to the outer wall of the worm (3). A worm gear (5) is meshed with the outer wall of the worm (3). A lead screw (6) is fixedly connected to the inner wall of the worm gear (5). A first limiting block (7) is fixedly connected to the outer wall of the lead screw (6). A limiting ring (8) is rotatably connected to the outer wall of the first limiting block (7). The outer wall of the limiting ring (8) is fixedly connected to the inner wall of the second connecting pipe (2). A support cylinder (10) is slidably connected to the inner wall of the second connecting pipe (2). An internally threaded slider (9) is fixedly connected to the inner wall of the support cylinder (10). The outer wall of the lead screw (6) is threadedly connected to the inner wall of the internally threaded slider (9). A second limiting block (11) is fixedly connected to the outer wall of the lead screw (6). A limiting post (26) is fixedly connected to the outer wall of the support cylinder (10). A limiting groove (25) is formed in the inner wall of the second connecting pipe (2). The outer wall of the limiting post (26) is slidably connected to the inner wall of the limiting groove (25). A folding assembly is arranged on the outer wall of the second connecting pipe (2).
2. The folding structure of the electric bicycle according to claim 1, wherein: The folding assembly includes a first fixing block (12). The outer wall of the first fixing block (12) is fixedly connected to the outer wall of the second connecting pipe (2). A fixing cylinder (13) is fixedly connected to the outer wall of the first fixing block (12). A fixing post (14) is fixedly connected to the inner wall of the fixing cylinder (13). A second fixing block (15) is rotatably connected to the outer wall of the fixing post (14). The outer wall of the second fixing block (15) is fixedly connected to the outer wall of the first connecting pipe (1). One end of the second connecting pipe (2) close to the first fixing block (12) is in contact with one end of the first connecting pipe (1) close to the second fixing block (15).
3. The folding structure of the electric bicycle according to claim 1, characterized in that: A first cylinder (16) is fixedly connected to the outer wall of the second connecting pipe (2). A limiting piece (17) is slidably connected to the inner wall of the first cylinder (16).
4. The folding structure of the electric bicycle according to claim 3, wherein: One end of the limiting piece (17) away from the second connecting pipe (2) is fixedly connected to a cylinder (18). A clamping block (19) is fixedly connected to the outer wall of the cylinder (18).
5. The folding structure of the electric bicycle according to claim 1, wherein: A second cylinder (20) is fixedly connected to the inside of the first connecting pipe (1).
6. The folding structure of the electric bicycle according to claim 5, wherein: A cylinder groove (21) is formed in the outer wall of the second cylinder (20). A clamping groove (22) is formed in the inner wall of the second cylinder (20).
7. The folding structure of the electric bicycle according to claim 4, wherein: The outer wall of the clamping block (19) is slidably connected to the inner wall of the cylinder groove (21). The outer wall of the clamping block (19) is slidably connected to the inner wall of the clamping groove (22).
8. The folding structure of an electric bicycle according to claim 5, characterized in that: One end of a spring (23) is fixedly connected to the inner wall of the second cylinder (20). The other end of the spring (23) is fixedly connected to a resisting block (24). One end of the resisting block (24) away from the spring (23) is in contact with one end of the cylinder (18) away from the limiting piece (17).