Folding joint

Abstract

The utility model provides a folding joint which comprises an upper joint, a lower joint and a lock bolt, the upper joint and the lower joint are respectively provided with a first inner tooth hole and a second inner tooth hole, the outer surface of the lock bolt is provided with meshing teeth matched with the first inner tooth hole and the second inner tooth hole, and the lock bolt can axially move on the first inner tooth hole and the second inner tooth hole. The anti-theft lock is characterized by further comprising an elastic reset piece and a limiting column arranged on the surface of the lock bolt, the elastic reset piece is arranged between the lock bolt and the upper connector or the lower connector, one end of the elastic reset piece abuts against the limiting column, and the other end of the elastic reset piece abuts against the inner side of the upper connector. The limiting column can overcome the elastic force of the elastic reset piece so that the lock bolt can axially move relative to the upper connector or the lower connector, and when the meshing teeth on the surface of the lock bolt are disengaged from the first inner tooth hole, the upper connector and the lower connector can rotate relative to each other. The folding joint disclosed by the utility model is simple in structure and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the technical field of bicycle, electric bicycle and scooter accessories, and more specifically, to a folding connector. Background Technology

[0002] With the acceleration of urbanization and people's pursuit of environmentally friendly travel methods, foldable devices such as folding bicycles and folding electric bikes have become increasingly popular among consumers. These devices, through their folding joint design, can quickly reduce their size when not in use, making them convenient for storage and transportation, and also easy for users to use in various scenarios.

[0003] Most existing folding joints can only achieve simple folding and locking functions, making it difficult for users to adjust to the most comfortable position according to their height, arm reach, riding habits, or road conditions. This affects the user's riding experience. Therefore, a folding joint with an adjustable angle between the stem tube and the frame is needed to meet the needs of different users.

[0004] For example, Chinese patent document CN214189960U discloses a handlebar stem folding connector, including a lower connector and an upper connector connected by a locking device. The mating surfaces of the lower and upper connectors are respectively provided with evenly distributed concave and convex teeth along the radial direction. The locking device includes a pull rod, an eccentric handle, and a nut. The pull rod passes through the central through hole of the lower and upper connectors, the tail end of the pull rod is connected to the eccentric handle, the front end of the pull rod is connected to the nut, and a spring is sleeved around the pull rod. The two ends of the spring abut against the inner sides of the lower and upper connectors, respectively. The lower and upper connectors of this handlebar stem folding connector are matched by toothed pressing, and the upper and lower connectors are locked by the locking device. However, when a certain angle needs to be adjusted, after the locking device is released, the lower and upper connectors will separate by a certain distance under the elastic force of the spring. At this time, the upper connector can be rotated to a certain angle, and then the upper connector can be fastened to the lower connector and locked again. However, adjusting the angle requires manually loosening the eccentric handle to unlock it, then adjusting the angle and then re-locking the eccentric handle, which is cumbersome and inconvenient. Utility Model Content

[0005] The purpose of this invention is to provide a folding connector that is simple in structure and easy to operate.

[0006] The technical solution adopted by the folding joint disclosed in this utility model is:

[0007] A folding connector includes an upper connector, a lower connector, and a locking bolt. The upper connector and the lower connector are respectively provided with a first internal toothed hole and a second internal toothed hole. The outer surface of the locking bolt is provided with meshing teeth that mate with the first internal toothed hole and the second internal toothed hole. The locking bolt can move axially on the first internal toothed hole and the second internal toothed hole. It also includes an elastic reset member and a limiting post disposed on the surface of the locking bolt. The elastic reset member is disposed between the locking bolt and the upper connector or the lower connector. One end of the elastic reset member abuts against the limiting post, and the other end abuts against the inner side of the upper connector. The limiting post can overcome the elastic force of the elastic reset member, allowing the locking bolt to move axially relative to the upper connector or the lower connector. When the meshing teeth on the surface of the locking bolt disengage from the first internal toothed hole, the upper connector and the lower connector can rotate relative to each other.

[0008] As a preferred embodiment, the upper connector is provided with a left clamping part and a right clamping part, the lower connector is provided with a connecting part, the connecting part is located between the left clamping part and the right clamping part, the first internal tooth hole is located on the left clamping part and the right clamping part, the second internal tooth hole is located on the connecting part, and the locking bolt is located between the left clamping part and the right clamping part.

[0009] As a preferred embodiment, the outer surface of the bolt is provided with an annular surface, and the annular surface and the meshing teeth are alternately arranged on the surface of the bolt, and the diameter of the annular surface is not greater than the diameter of the root circle of the meshing teeth.

[0010] As a preferred embodiment, the bolt has a frustoconical shape, and both ends of the bolt are respectively provided with a pressing end and an anti-disengagement end, the diameter of the pressing end being smaller than the diameter of the anti-disengagement end.

[0011] As a preferred embodiment, a limiting seat is screwed onto the pressing end of the bolt. The limiting seat includes a limiting cover and a base, and the diameter of the limiting cover is larger than the diameter of the first internal tooth hole.

[0012] As a preferred embodiment, the inner side of the lower connector is provided with a groove, and the groove of the lower connector and the tooth groove on the surface of the locking bolt form a receiving cavity, and the elastic reset member is movably disposed in the receiving cavity.

[0013] As a preferred embodiment, the device also includes a sleeve rod, which includes a head and a rod portion. The elastic reset member is sleeved on the rod portion and placed inside the receiving cavity, with one end of the elastic reset member abutting against the head. The head of the sleeve rod abuts against the inner side of the upper connector.

[0014] As a preferred embodiment, the surface of the bolt is provided with a mounting hole, and the limiting post is installed in the mounting hole.

[0015] As a preferred embodiment, the lower connector is provided with a through hole, which communicates with the mounting hole.

[0016] As a preferred embodiment, the lower connector is provided with support blocks on both sides, and the top of the support blocks is provided with an arc-shaped groove.

[0017] The beneficial effects of the folding connector disclosed in this utility model are as follows: By pushing the bolt, the limiting post on the bolt overcomes the elastic force of the elastic reset member and moves axially relative to the upper or lower connector. When the meshing teeth on the surface of the bolt disengage from the first internal tooth hole of the upper connector, the upper and lower connectors can rotate relative to each other, thereby adjusting the angle between the upper and lower connectors and making it more applicable. When the appropriate angle is adjusted, the bolt is released. When the meshing teeth at both ends of the bolt surface are respectively aligned with the protrusion and concavity of the first internal tooth hole of the upper connector, the elastic force of the elastic reset member will automatically reset the bolt, so that the meshing teeth on the bolt surface re-engage with the first internal tooth hole of the upper connector, thereby locking the upper and lower connectors at the adjusted angle position. The operation is simple and quick, and locking and unlocking can be completed by simply pushing or releasing the bolt. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the folding joint of this utility model.

[0019] Figure 2 This is an exploded schematic diagram of the folding joint of this utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the folding joint of this utility model.

[0021] Figure 4 This is a schematic diagram of the folding connector of this utility model with the locking bolt and the upper connector in the unlocked state.

[0022] Figure 5 This is a schematic diagram of the internal structure of the lower connector in the folding connector of this utility model.

[0023] Figure 6 This is a schematic diagram of the upper connector in the folding connector of this utility model. Detailed Implementation

[0024] A folding connector includes an upper connector, a lower connector, and a locking bolt. The upper connector and the lower connector are respectively provided with a first internal toothed hole and a second internal toothed hole. The outer surface of the locking bolt is provided with meshing teeth that mate with the first internal toothed hole and the second internal toothed hole. The locking bolt can move axially on the first internal toothed hole and the second internal toothed hole. It also includes an elastic reset member and a limiting post disposed on the surface of the locking bolt. The elastic reset member is disposed between the locking bolt and the upper connector or the lower connector. One end of the elastic reset member abuts against the limiting post, and the other end abuts against the inner side of the upper connector. The limiting post can overcome the elastic force of the elastic reset member, allowing the locking bolt to move axially relative to the upper connector or the lower connector. When the meshing teeth on the surface of the locking bolt disengage from the first internal toothed hole, the upper connector and the lower connector can rotate relative to each other.

[0025] By pushing the bolt, the limiting pin on the bolt overcomes the elastic force of the elastic reset element and moves axially relative to the upper or lower connector. When the meshing teeth on the bolt surface disengage from the first internal tooth hole of the upper connector, the upper and lower connectors can rotate relative to each other, thereby adjusting the angle between the upper and lower connectors, making it more versatile. After adjusting to a suitable angle, the bolt is released. When the meshing teeth at both ends of the bolt surface are aligned with the protrusions and concavities of the first internal tooth hole of the upper connector, the elastic force of the elastic reset element will automatically reset the bolt, causing the meshing teeth on the bolt surface to re-engage with the first internal tooth hole of the upper connector, thus locking the upper and lower connectors at the adjusted angle position. The operation is simple and quick; locking and unlocking can be completed simply by pushing or releasing the bolt.

[0026] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0027] Please refer to Figures 1 to 6 A folding connector includes an upper connector 10, a lower connector 20, a locking bolt 30, an elastic reset element 40, and a limiting post 50. The upper connector 10 has a handlebar stem 80 at its upper end, which is fixedly connected to or integrally formed with the upper connector 10. The lower connector 20 has a fork tube 90 threadedly connected to its lower end. The locking bolt 30 has a mounting hole 35 on its surface, and the limiting post 50 is installed within the mounting hole 35. The elastic reset element 40 in this application is a spring.

[0028] The upper connector 10 is provided with a left clamping part 11, a right clamping part 12 and a first internal toothed hole 13. The lower connector 20 is provided with a connecting part 21 and a second internal toothed hole 22. The connecting part 21 is located between the left clamping part 11 and the right clamping part 12. The first internal toothed hole 13 is located on the left clamping part 11 and the right clamping part 12. The second internal toothed hole 22 is located on the connecting part 21. The locking bolt 30 is located between the left clamping part 11 and the right clamping part 12, so that the locking bolt 30 can be stably installed between the upper connector 10 and the lower connector 20.

[0029] The outer surface of the bolt 30 is provided with engaging teeth 31 and an annular surface 32. The engaging teeth 31 in the middle of the bolt 30 are always engaged with the second inner tooth hole 22 of the lower connector 20. When the first inner tooth hole 13 of the upper connector 10 is aligned with the corresponding engaging teeth 31 on the surface of the bolt 30, the bolt 30 is automatically reset by the elastic force of the elastic reset member 40. The engaging teeth 31 at both ends of the surface of the bolt 30 are engaged with the first inner tooth hole 13 of the upper connector 10. At this time, the upper connector 10 and the lower connector 20 are locked and cannot rotate relative to each other. The annular surface 32 and the engaging teeth 31 are alternately arranged on the surface of the bolt 30, and the annular surface 32 is... The diameter of 2 is not greater than the diameter of the root circle of the meshing tooth 31, which pushes the bolt 30 to move axially, so that the limiting post 50 on the bolt 30 compresses the elastic reset member 40. The meshing teeth 31 at both ends of the bolt 30 disengage from the first internal tooth hole 13 of the left clamping part 11 and the right clamping part 12. When the annular surface 32 of the bolt 30 corresponds to the first internal tooth hole 13, the annular surface 32 of the bolt 30 cannot be engaged and fixed with the first internal tooth hole 13. At this time, it is in the unlocked state, and the upper connector 10 and the lower connector 20 can rotate relative to each other, which can realize multi-angle folding. In this embodiment, the annular surface 32 is a smooth annular surface, which makes it smoother to adjust the angle in the unlocked state.

[0030] In another embodiment, the meshing teeth 31 on the surface of the bolt 30 are completely disengaged from the first internal tooth hole 13 and the second internal tooth hole 22 and removed. After the upper connector 10 and the lower connector 20 are rotated at a certain angle, the bolt 30 is then installed back between the upper connector 10 and the lower connector 20. The meshing teeth 31 of the bolt 30 cooperate with the first internal tooth hole 13 and the second internal tooth hole 22, which can also achieve the effect of fixing the upper connector 10 and the lower connector 20 after adjusting the angle.

[0031] The bolt 30 has a frustoconical shape. Both ends of the bolt 30 are respectively provided with a pressing end 33 and an anti-disengagement end 34. The pressing end 33 is located on the left clamping part 11, and the anti-disengagement end 34 is located on the right clamping part 12. When the bolt 30 is pushed on the pressing end 33, the limiting post 50 on the bolt 30 overcomes the elastic force of the elastic reset member 40 and moves axially relative to the anti-disengagement end 34. When the bolt 30 is released, the elastic force of the elastic reset member 40 automatically resets the bolt 30, causing the bolt 30 to move axially towards the pressing end 33. The diameter of the anti-disengagement end 34 is larger than the diameter of the pressing end 33, effectively preventing the bolt 30 from accidentally disengaging during pressing and improving stability during use.

[0032] In another embodiment, the pressing end 33 is disposed on the right clamping part 12 and the anti-detachment end 34 is disposed on the left clamping part 11. They can be replaced according to the user's usage habits to achieve the same effect.

[0033] A limiting seat 60 is screwed onto the pressing end 33 of the bolt 30. The limiting seat 60 includes a limiting cover 61 and a base. The diameter of the limiting cover 61 is larger than the diameter of the first internal tooth hole 13, which can effectively prevent the user from excessively pressing the bolt 30 during operation, causing damage to the bolt 30 or structural failure, thus improving the safety of operation.

[0034] The lower connector 20 has a groove 23 on its inner side. The groove 23 of the lower connector 20 and the toothed groove on the surface of the bolt 30 form a receiving cavity. The elastic reset member 40 is movably disposed in the receiving cavity, which can avoid displacement or damage caused by external force during operation and ensure that the reset function of the bolt 30 is more reliable. The upper connector 10 has a notch 14 that communicates with the receiving cavity. The notch 14 communicates with the groove 23 of the lower connector 20. The elastic reset member 40 can be inserted into the receiving cavity through the notch 14.

[0035] The lower connector 20 is provided with a through hole 24, which communicates with the mounting hole 35. In this embodiment, the limiting post 50 is a nut screw, which can compress the elastic reset member 40. The nut screw can be installed into the mounting hole 35 of the bolt 30 through the through hole 24 of the lower connector 20, making disassembly and assembly simple and convenient.

[0036] In the assembly process of a folding connector, after the upper connector 10, lower connector 20, and locking bolt 30 are properly installed and fitted, the elastic reset member 40 is first installed into the receiving cavity through the notch 14. At this time, the elastic reset member 40 is in its natural state, with one end abutting against the inner side of the upper connector 10 and the other end extending through the mounting hole 35. Then, by using a tool and squeezing the elastic reset member 40 to compress it to a certain extent, the nut screw can be installed from the through hole 24 of the lower connector 20 into the mounting hole 35 of the locking bolt 30. After removing the tool, one end of the nut screw will abut against the elastic reset member 40, ensuring that the elastic reset member 40 is in a compressed state after assembly, providing stable elasticity. This enables a stable fit between the locking bolt 30 and the upper connector 10 and lower connector 20. The overall structure is compact, the connection method between the components is simple and reliable, and it is easy to install and disassemble.

[0037] A folding connector also includes a sleeve rod 70, which includes a head and a rod portion. The elastic reset member 40 is sleeved on the rod portion and placed in the receiving cavity, with one end of the elastic reset member 40 abutting against the head. The head of the sleeve rod 70 abuts against the inner side of the upper connector 10. The spring sleeved on the rod portion can provide a stable preload, which can prevent the spring from suddenly deforming due to external force in the initial state, thereby improving the stability and reliability of the system. The rod portion can also limit the maximum compression of the spring, preventing the spring from being damaged due to excessive compression.

[0038] The lower connector 20 has support blocks 25 on both sides, and the top of the support block 25 has an arc-shaped groove 23. The arc-shaped groove 23 is consistent with the curvature of the outer surface of the left clamping part 11 and the right clamping part 12 of the upper connector 10, which can provide additional structural support and enhance the connection stability between the upper connector 10 and the lower connector 20.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A folding connector, comprising an upper connector, a lower connector, and a locking bolt, wherein the upper connector and the lower connector are respectively provided with a first internal toothed hole and a second internal toothed hole, and the outer surface of the locking bolt is provided with meshing teeth that mate with the first internal toothed hole and the second internal toothed hole, and the locking bolt is axially movable in the first internal toothed hole and the second internal toothed hole, characterized in that, It also includes an elastic reset member and a limiting post disposed on the surface of the bolt. The elastic reset member is disposed between the bolt and the upper or lower connector. One end of the elastic reset member abuts against the limiting post, and the other end abuts against the inner side of the upper connector. The limiting post can overcome the elastic force of the elastic reset member, allowing the bolt to move axially relative to the upper or lower connector. When the meshing teeth on the surface of the bolt disengage from the first internal tooth hole, the upper and lower connectors can rotate relative to each other.

2. The folding joint as described in claim 1, characterized in that, The upper connector has a left clamping part and a right clamping part, and the lower connector has a connecting part. The connecting part is located between the left clamping part and the right clamping part. The first internal toothed hole is located on the left clamping part and the right clamping part, the second internal toothed hole is located on the connecting part, and the locking bolt is located between the left clamping part and the right clamping part.

3. The folding joint as described in claim 1, characterized in that, The outer surface of the bolt is provided with an annular surface, and the annular surface and the meshing teeth are alternately arranged on the surface of the bolt, and the diameter of the annular surface is not greater than the diameter of the root circle of the meshing teeth.

4. The folding joint as described in claim 3, characterized in that, The bolt has a frustoconical shape, and each end of the bolt is provided with a pressing end and an anti-disengagement end. The diameter of the pressing end is smaller than the diameter of the anti-disengagement end.

5. The folding joint as described in claim 4, characterized in that, A limiting seat is screwed onto the pressing end of the bolt. The limiting seat includes a limiting cover and a base. The diameter of the limiting cover is larger than the diameter of the first internal tooth hole.

6. The folding joint as described in claim 1, characterized in that, The inner side of the lower connector is provided with a groove, and the groove of the lower connector and the tooth groove on the surface of the locking bolt form a receiving cavity, and the elastic reset member is movably disposed in the receiving cavity.

7. The folding joint as described in claim 6, characterized in that, It also includes a sleeve rod, which includes a head and a rod portion. The elastic reset member is sleeved on the rod portion and placed in the receiving cavity, with one end of the elastic reset member abutting against the head. The head of the sleeve rod abuts against the inner side of the upper connector.

8. The folding joint as described in claim 1, characterized in that, The surface of the bolt is provided with a mounting hole, and the limiting post is installed in the mounting hole.

9. The folding joint as described in claim 8, characterized in that, The lower connector is provided with a through hole, which communicates with the mounting hole.

10. The folding joint as described in claim 1, characterized in that, The lower connector has support blocks on both sides, and the top of the support blocks has an arc-shaped groove.

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