Bicycle folding mechanism

Abstract

The utility model belongs to the technical field of bicycles, and discloses a bicycle folding mechanism which comprises a handle, a first hinge joint, a second hinge joint and a spring bolt, a sliding groove is formed in a spring bolt cover fixing seat, and a spring bolt spring limiting head is arranged on the sliding groove; a spring bolt spring mounting cavity is formed in the lower end of the spring bolt, the spring bolt spring limiting head is clamped into the spring bolt spring mounting cavity, and the spring bolt spring limiting head is connected with the spring bolt spring mounting cavity through a spring bolt spring; the upper end of the spring bolt is connected with a pull rope fixing head of a pull rope through a first mounting shaft, and the other end of the pull rope sequentially penetrates through a pull rope guide hole formed in the top end of the handle and a pull rope limiting clamping head located on the back face of the handle. According to the scheme, the handlebar stem and the frame of the bicycle can be folded through the folding mechanism formed by the handle and the connecting rod which are connected in a hinged mode, and the problems that a traditional bicycle folder is complex in structure, large in occupied space, inconvenient to operate and the like are solved.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and more specifically, to a bicycle folding mechanism. Background Technology

[0002] A bicycle, also known as a pedal bike or cyclist, is a small, typically two-wheeled land vehicle, generally propelled by pedaling. Based on the working characteristics of its components, it can be broadly categorized into a steering system, a drive system, and a braking system. Traditional bicycles have fixed stems and frames, occupying a significant amount of space and making storage and transportation inconvenient. To address these issues, many bicycle companies have proposed installing folding mechanisms. These mechanisms are mounted on the stems and frame crossbars, allowing the bicycle's stem and frame to fold, thus resolving the aforementioned problems.

[0003] Existing bicycle folding mechanisms are limited in function and cannot be universally used on a single bicycle. The stem folding mechanism has one external shape, and the frame folding mechanism has another, thus affecting the overall aesthetic harmony of the bicycle. Furthermore, existing folding mechanisms are rudimentary in structure, difficult to operate, and negatively impact the user experience. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a bicycle folding mechanism.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A bicycle folding mechanism includes a handlebar, a first hinge joint, a second hinge joint, and a latch. The first hinge joint is located at the lower section of the handlebar near the top, and the second hinge joint is located at the upper middle section of the handlebar. The first and second hinge joints are located on the same side of the handlebar. A latch cover fixing seat is provided at the connection between the upper end of the handlebar and the second hinge joint. The latch cover fixing seat has a sliding groove, and a latch spring limiting head is provided on the sliding groove. A latch spring mounting cavity is provided at the lower end of the latch, and the latch spring limiting head is engaged in the latch spring mounting cavity. The latch spring limiting head and the latch spring mounting cavity are connected by a latch spring. The upper end of the latch is connected to the pull rope fixing head of the pull rope through a mounting shaft. The other end of the pull rope passes through a pull rope guide hole located at the top of the handlebar and a pull rope limiting clip located on the back of the handlebar. A latch cover is mounted on the latch cover fixing seat. The second hinge joint is connected to the connecting rod via the third hinge shaft. The connecting rod is connected to the first hinge shaft via an adjusting connecting rod. The top of the connecting rod is provided with a connecting rod anti-rotation head. A return spring is installed inside the first hinge joint via the second hinge shaft.

[0007] As a further description of the above technical solution: the first hinge shaft is connected to the first hinge shaft seat by a fixing screw, the second hinge shaft is connected to the second hinge shaft seat by a fixing screw, and the first hinge shaft seat corresponds to the second hinge shaft seat.

[0008] As a further description of the above technical solution: When this solution is applied to a folding stem, the first hinge seat is located at the lower edge of the stem rod, and the second hinge seat is located at the upper edge of the stem connecting seat; the stem connecting seat is provided with a third hinge seat on the other side corresponding to the second hinge seat, and the stem rod is provided with a third hinge joint on the other side corresponding to the first hinge seat. The third hinge seat is hinged to the third hinge joint via a fourth hinge.

[0009] As a further description of the above technical solution: When this solution is applied to a folding frame, hinge seat one is located on one side of the front section of the frame crossbar, and hinge seat two is located on one side of the rear section of the frame crossbar, with hinge seat one and hinge seat two on the same side; hinge seat three is provided on the other side of the rear section of the frame crossbar corresponding to hinge seat two, and hinge joint three is provided on the other side of the front section of the frame crossbar corresponding to hinge seat one. Hinge seat three is hinged to hinge joint three via hinge shaft four.

[0010] As a further description of the above technical solution: the inner side of the handle is provided with a groove.

[0011] As a further description of the above technical solution: the pull rope is a strip structure or a circular rope structure, and the other end of the pull rope and the pull rope fixing head is fitted with a pull rope rubber sleeve.

[0012] As a further description of the above technical solution: a handle placement slot is provided on one side of the front section of the frame crossbar, and the handle placement slot and the hinge seat are located on the same side of the front section of the frame crossbar.

[0013] As a further description of the above technical solution: the hinge seat 2 is provided with a reset spring movable groove in the middle, and the wall of the reset spring limiting groove is connected to the spring head 1 of the reset spring.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] This utility model adopts a linkage structure, which makes the overall structure more stable;

[0016] This utility model uses a pull rope to drive the locking tongue, making it more convenient for users to operate;

[0017] This utility model can be mounted on both the stem and the frame, ensuring the overall appearance of the folding bicycle and making it more aesthetically pleasing.

[0018] This invention allows for adjustment of the folding angle of the folding mechanism via an adjustable linkage, facilitating subsequent adjustments to the folding stem and frame by the customer. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a detailed structural diagram of the locking tongue of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the present invention used for the handle stand;

[0022] Figure 4 This is a schematic diagram of the structure of the present invention after the handle is folded.

[0023] Figure 5 This is a schematic diagram of the cross-section of the present invention.

[0024] Figure 6 This is a cross-sectional view of the present invention after the handle is folded.

[0025] Figure 7 This is a schematic diagram of the structure of this utility model used in a vehicle frame;

[0026] Figure 8 This is a schematic diagram of the structure of the present invention after the frame is folded.

[0027] Explanation of the labels in the diagram:

[0028] 1. Handle; 2. Pull cord rubber sleeve; 3. Pull cord; 4. Mounting shaft one; 5. Pull cord fixing head; 6. Locking tongue spring; 7. Hinge shaft one; 8. Adjusting connecting rod; 9. Connecting rod limit nut; 10. Connecting rod; 11. Hinge shaft three; 12. Groove; 13. Return spring; 131. Spring head one; 132. Spring head two; 14. Hinge joint one; 15. Hinge shaft two; 16. Locking tongue cover; 17. Pull cord limit clip; 18. Connecting rod anti-rotation head; 9. Hinge seat 1; 20. Hinge seat 2; 21. Stem connector; 22. Hinge seat 3; 221. Hinge 4; 23. Hinge joint 3; 24. Stem; 25. Hinge joint 2; 26. Lock tongue spring limit head; 27. Return spring limit groove wall; 28. Lock tongue; 29. ​​Rear section of frame crossbar; 30. Front section of frame crossbar; 31. Handlebar placement groove; 32. Cable guide hole; 33. Lock tongue cover fixing seat; 34. Lock tongue spring mounting cavity. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-6 A bicycle folding mechanism includes a handle 1, a hinge joint 14, a hinge joint 25, and a locking tongue 28. The handle 1 has a groove 12 on its inner side. Hinge 14 is located at the lower section of handle 1 near the top, and hinge 25 is located at the middle section of handle 1 near the top. Hinge 14 and hinge 25 are located on the same side of handle 1. A latch cover fixing seat 33 is provided at the connection between the upper end of handle 1 and hinge 25. A sliding groove is opened on the latch cover fixing seat 33, and a latch spring limiting head 26 is provided on the sliding groove. A latch spring mounting cavity 34 is opened at the lower end of latch 28. The latch spring limiting head 26 is inserted into the latch spring mounting cavity 34. The latch spring limiting head 26 and the latch spring mounting cavity 34 are connected by a latch spring 6. The upper end of latch 28 is connected to the pull rope fixing head 5 of pull rope 3 through mounting shaft 14. The other end of pull rope 3 passes through the pull rope guide hole at the top of handle 1 and the pull rope limiting clip 17 on the back of handle 1 in sequence. A latch cover 16 is installed on the latch cover fixing seat 33. The second hinge joint 25 is connected to the connecting rod 10 via the third hinge shaft 11. The connecting rod 10 is connected to the first hinge shaft 7 via the adjusting connecting rod 8. The top of the connecting rod 10 is provided with a connecting rod anti-rotation head 18. A return spring 13 is installed inside the first hinge joint 14 via the second hinge shaft 15.

[0031] Hinge pin 1 7 is connected to hinge pin seat 1 19 by a fixing screw, and hinge pin 2 15 is connected to hinge pin seat 2 20 by a fixing screw. Hinge pin seat 1 19 and hinge pin seat 2 20 correspond to each other.

[0032] When this solution is applied to the folding stem, hinge seat 19 is located at the lower edge of the stem 24, and hinge seat 20 is located at the upper edge of the stem connecting seat 21; on the other side of the stem connecting seat 21 corresponding to hinge seat 20, hinge seat 32 is provided, and on the other side of the stem 24 corresponding to hinge seat 19, hinge joint 33 is provided. Hinge seat 322 is hinged to hinge joint 33 through hinge shaft 421.

[0033] Please see Figure 3 , 45, 7, and 8. When this solution is applied to a folding frame: Hinge seat 19 is located on one side of the front section 30 of the frame crossbar, and hinge seat 20 is located on one side of the rear section 29 of the frame crossbar, with hinge seat 19 and hinge seat 20 on the same side; on the other side of the rear section 29 of the frame crossbar corresponding to hinge seat 20, hinge seat 32 is provided, and on the other side of the front section 30 of the frame crossbar corresponding to hinge seat 19, hinge joint 33 is provided. Hinge seat 32 is hinged to hinge joint 33 via hinge shaft 421. A handle placement slot 31 is provided on one side of the front section 30 of the frame crossbar, and the handle placement slot 31 and hinge seat 19 are located on the same side of the front section 30 of the frame crossbar.

[0034] The hinge seat 20 has a return spring movable groove in the middle. The two ends of the return spring 13 are spring head 131 and spring head 132, respectively. The wall 27 of the return spring limiting groove is connected to the spring head 131 of the return spring 13, and the spring head 132 of the return spring 13 is connected to the lower end of the handle 1.

[0035] The pull rope 3 has a strip-shaped structure, and the other end of the pull rope 3 and the pull rope fixing head 5 is fitted with a pull rope rubber sleeve 2.

[0036] Pulling the locking tongue 28 with the pull rope 3 causes it to move upward and separate from the connecting rod anti-rotation head 18. The elastic force generated at both ends of the return spring 13 acts on the return spring limiting groove wall 27 and the lower end of the handle 1, respectively, allowing the entire mechanism to unlock quickly and easily, effectively improving unlocking efficiency. Meanwhile, the locking tongue spring 6 presses down the locking tongue 28, which blocks the connecting rod anti-rotation head 18, preventing the handle 1 and connecting rod 10 from rotating. This allows the connecting rod 10 and handle 1 to fasten the stem 24 to the stem connecting seat 21 (or the connecting rod 10 and handle 1 to tightly fasten the rear section 29 of the frame crossbar and the front section 30 of the frame crossbar together), effectively improving riding safety.

[0037] The bicycle folding mechanism in this design operates as follows when folding the stem:

[0038] Before folding: The locking spring 6 presses down the locking tongue 28 and inserts it into the connecting rod anti-rotation head 18, limiting the connecting rod 10 and preventing the handle 1 and connecting rod 10 from rotating, thereby fastening the stem 24 to the stem connecting seat 21.

[0039] Folding process: Pull the pull rope 3, which will cause the locking tongue 28 to move upward and the locking tongue spring 6 to be compressed. Then the locking tongue 28 will disengage from the connecting rod anti-rotation head 18. The handlebar 24 will rotate through the adjusting connecting rod 8 to drive the connecting rod 10 to rotate, thereby separating the handlebar 24 from the handlebar connecting seat 21.

[0040] The bicycle folding mechanism in this design is used to fold the frame in the following motion states:

[0041] Before folding: The locking spring 6 presses down the locking tongue 28 and engages with the connecting rod anti-rotation head 18, limiting the connecting rod 10 and preventing the handle 1 and connecting rod 10 from rotating, thereby securing the rear section 29 of the frame crossbar to the front section 30 of the frame crossbar. The handle 1 is embedded in the handle placement slot 31, so that the folding mechanism is not exposed outside the front section 30 of the frame crossbar, thus making the frame more aesthetically pleasing.

[0042] Folding process: Pull the pull rope 3, which will cause the locking tongue 28 to move upward and the locking tongue spring 6 to compress. Then the locking tongue 28 will disengage from the connecting rod anti-rotation head 18, and the upright 24 will rotate the connecting rod 10 through the adjusting link 8, thereby separating the front section 30 of the frame crossbar from the rear section 29 of the frame crossbar.

[0043] The function of the adjusting link 8 is to adjust the folding angle of the folding stem and folding frame by adjusting the distance between the first hinge pin 7 and the third hinge pin 11. To prevent the distance between the first hinge pin 7 and the third hinge pin 11 from changing during use, a connecting rod limit nut 9 is provided between the connecting rod 10 and the adjusting link 8.

[0044] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A bicycle folding mechanism, comprising a handle (1), a first hinge joint (14), a second hinge joint (25), and a locking tongue (28), wherein the first hinge joint (14) is located at the lower section of the handle (1) near the top, and the second hinge joint (25) is located at the upper middle section of the handle (1), characterized in that: The first hinge (14) and the second hinge (25) are located on the same side of the handle (1). The upper end of the handle (1) is connected to the second hinge (25) and a latch cover fixing seat (33) is provided. The latch cover fixing seat (33) has a sliding groove and a latch spring limiting head (26) is provided on the sliding groove. The lower end of the latch (28) has a latch spring mounting cavity (34). The latch spring limiting head (26) is inserted into the latch spring mounting cavity (34). The latch spring limiting head (26) and the latch spring mounting cavity (34) are connected by a latch spring (6). The latch (28) The upper end of the handle (1) is connected to the pull rope fixing head (5) of the pull rope (3) via the mounting shaft (4). The other end of the pull rope (3) passes through the pull rope guide hole at the top of the handle (1) and the pull rope limiting clip (17) on the back of the handle (1). The hinge joint (25) is connected to the connecting rod (10) via the hinge shaft (11). The connecting rod (10) is connected to the hinge shaft (7) via the adjusting connecting rod (8). The top of the connecting rod (10) is provided with a connecting rod anti-rotation head (18). A return spring (13) is installed in the hinge joint (14) via the hinge shaft (15).

2. The bicycle folding mechanism according to claim 1, characterized in that: The first hinge (7) is connected to the first hinge seat (19) by a fixing screw, and the second hinge (15) is connected to the second hinge seat (20) by a fixing screw. The first hinge seat (19) corresponds to the second hinge seat (20).

3. A bicycle folding mechanism according to claim 2, characterized in that: The first hinge seat (19) is located at the lower edge of the handlebar stem (24), and the second hinge seat (20) is located at the upper edge of the handlebar stem connecting seat (21). The handlebar stem connecting seat (21) is provided with a third hinge seat (22) on the other side corresponding to the second hinge seat (20), and the handlebar stem (24) is provided with a third hinge joint (23) on the other side corresponding to the first hinge seat (19). The third hinge seat (22) is hinged to the third hinge joint (23) through a fourth hinge (221).

4. A bicycle folding mechanism according to claim 2, characterized in that: The first hinge seat (19) is located on one side of the front section (30) of the frame crossbar, and the second hinge seat (20) is located on one side of the rear section (29) of the frame crossbar. The first hinge seat (19) and the second hinge seat (20) are located on the same side. The rear section (29) of the frame crossbar is provided with the third hinge seat (22) on the other side corresponding to the second hinge seat (20). The front section (30) of the frame crossbar is provided with the third hinge joint (23) on the other side corresponding to the first hinge seat (19). The third hinge seat (22) is hinged to the third hinge joint (23) through the fourth hinge (221).

5. A bicycle folding mechanism according to claim 1, characterized in that: The handle (1) has a groove (12) on its inner side.

6. A bicycle folding mechanism according to claim 1, characterized in that: The pull rope (3) is a strip structure or a circular rope structure, and the other end of the pull rope (3) and the pull rope fixing head (5) is fitted with a pull rope rubber sleeve (2).

7. A bicycle folding mechanism according to claim 4, characterized in that: A handle placement slot (31) is provided on one side of the front section (30) of the frame crossbar. The handle placement slot (31) and the hinge seat (19) are located on the same side of the front section (30) of the frame crossbar.

8. A bicycle folding mechanism according to claim 3 or 4, characterized in that: The hinge seat 2 (20) is provided with a reset spring movable groove in the middle, and the reset spring limiting groove wall (27) is connected to the spring head 1 (131) of the reset spring (13).

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