Quick splicing structure of bicycle frame

Abstract

The utility model relates to the technical field of bicycles, and discloses a bicycle frame quick splicing structure which comprises a middle pipe, the bottom of the middle pipe is fixedly connected with a fixing pipe, the left end of the middle pipe is fixedly connected with an upper pipe, the end, away from the middle pipe, of the upper pipe is fixedly connected with a head pipe, and the right end of the head pipe is fixedly connected with a lower pipe. And the surface of the middle pipe is fixedly connected with a limiting ring. The fixing ring is sleeved on the surface of the middle pipe and slides downwards, the position of the fixing ring is limited through the limiting ring, follow-up installation is facilitated, meanwhile, the installation plate is aligned with the positioning plate, and the threaded rod is in threaded connection with the inner wall of the limiting ring and the inner wall of the fixing ring for fixation. And then the mounting plate and the positioning plate are fixedly connected in a threaded mode through the fastening bolt, so that mounting and fixing of the arc-shaped plate and the rear lower fork are completed, operation is easy and fast, meanwhile, follow-up disassembly and replacement are facilitated, the maintenance cost is reduced, and then practicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and in particular to a quick assembly structure for bicycle frames. Background Technology

[0002] Currently, bicycle frames on the market are mainly made of steel, aluminum alloy, titanium alloy, carbon fiber, scandium alloy, and magnesium alloy. As the skeleton of the entire bicycle, it largely determines and influences the correctness and comfort of riding posture.

[0003] In traditional bicycle frame designs, the various parts of the frame are usually fixed together by welding. Although this provides high strength and stability, once the welded frame is installed, it is difficult to disassemble and replace. If the rear chainstay is damaged, the entire frame usually needs to be replaced, resulting in high maintenance costs and reduced practicality. Therefore, we propose a quick-assembly structure for bicycle frames. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a quick assembly structure for bicycle frames.

[0005] This utility model is achieved using the following technical solution: a quick-assembly structure for a bicycle frame, comprising a middle tube, a fixing tube fixedly connected to the bottom of the middle tube, an upper tube fixedly connected to the left end of the middle tube, a head tube fixedly connected to the end of the upper tube away from the middle tube, a lower tube fixedly connected to the right end of the head tube, a limit ring fixedly connected to the surface of the middle tube, a fixing ring provided at the upper end of the limit ring, a threaded rod threadedly connected to the inner wall of the fixing ring, an arc-shaped plate fixedly connected to the right end of the fixing ring, a rear chain fork fixedly connected to the end of the arc-shaped plate away from the fixing ring, a mounting plate fixedly connected to the left end of the rear chain fork, a fastening bolt threadedly connected to the inner wall of the mounting plate, and a positioning plate fixedly connected to the surface of the fixing tube.

[0006] The above technical solution uses a limiting ring to limit the position of the fixing ring, which facilitates subsequent installation. At the same time, the mounting plate and the positioning plate are aligned and fixed by threaded rods connected to the inner walls of the limiting ring and the fixing ring. Then, the mounting plate and the positioning plate are fixed by threaded bolts, thus completing the installation and fixing of the arc plate and the rear lower fork. The operation is simple and quick, and it is also easy to disassemble and replace later, reducing maintenance costs and improving practicality.

[0007] As a further improvement to the above solution, the bottom of the fixing ring contacts the top of the limiting ring, and the inner wall of the fixing ring is slidably connected to the surface of the intermediate tube.

[0008] With the above technical solution, the fixing ring can slide on the surface of the intermediate tube, which makes it easy for the mounting plate to align with the positioning plate and facilitates subsequent installation and fixing. At the same time, the intermediate tube plays a limiting role for the fixing ring.

[0009] As a further improvement to the above solution, the threaded rod passes through the fixing ring and is threadedly connected to the inner wall of the limiting ring.

[0010] The above technical solution uses threaded rods to fix the fixing ring and the limiting ring together, which facilitates subsequent disassembly and improves the convenience of use. In addition, multiple threaded rods are provided to ensure the stability of the connection.

[0011] As a further improvement to the above solution, the fastening bolt penetrates the mounting plate and is threadedly connected to the inner wall of the positioning plate.

[0012] The above technical solution uses fastening bolts to fix the mounting plate and positioning plate, which facilitates subsequent disassembly and makes the operation convenient and quick.

[0013] As a further improvement to the above solution, both the mounting plate and the positioning plate are arc-shaped.

[0014] The above technical solution uses arc-shaped mounting plates and positioning plates to better fit the shape of the fixed pipe, improving overall coordination. Two mounting plates and two positioning plates are provided to ensure structural stability after connection.

[0015] As a further improvement to the above solution, the right end of the lower tube is fixedly connected to the left end of the middle tube.

[0016] The above technical solution improves the overall structural strength by connecting the lower pipe to the middle pipe.

[0017] As a further improvement to the above solution, the inner wall of the rear lower fork is fixedly connected with a reinforcing rib plate.

[0018] By using the above technical solution, the connection between the reinforcing rib and the inner wall of the rear lower fork is strengthened, thereby improving the stability of the connection between the two rear lower forks and increasing the structural strength, thus extending the service life.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model incorporates a limiting ring, a fixing ring, a threaded rod, a mounting plate, fastening bolts, and a positioning plate. Specifically, the fixing ring slides downwards onto the surface of the intermediate tube, while the limiting ring limits its position for easy subsequent installation. The mounting plate aligns with the positioning plate and is secured by the threaded rod, which is threaded into the inner walls of the limiting and fixing rings. Finally, the mounting plate and positioning plate are threaded together and secured with fastening bolts. This completes the installation and fixation of the arc-shaped plate and the rear lower fork. The operation is simple and quick, facilitating subsequent disassembly and replacement, reducing maintenance costs, and thus improving practicality.

[0021] This invention improves the structural strength and stability of the rear lower fork by setting reinforcing ribs, specifically reinforcing ribs fixedly connected to the inner wall of the rear lower fork, thereby extending its service life. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the rear lower fork connection structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the intermediate tube connection structure of this utility model;

[0026] Figure 5 This is a top view of the structure of this utility model.

[0027] Explanation of key symbols:

[0028] 1. Intermediate tube; 2. Fixed tube; 3. Upper tube; 4. Head tube; 5. Lower tube; 6. Limiting ring; 7. Fixed ring; 8. Threaded rod; 9. Arc plate; 10. Rear lower fork; 11. Mounting plate; 12. Fastening bolt; 13. Positioning plate; 14. Reinforcing rib plate. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] Example:

[0031] Please combine Figure 1-5This embodiment of a bicycle frame quick-assembly structure includes a middle tube 1, a fixing tube 2 fixedly connected to the bottom of the middle tube 1, an upper tube 3 fixedly connected to the left end of the middle tube 1, a head tube 4 fixedly connected to the end of the upper tube 3 away from the middle tube 1, a lower tube 5 fixedly connected to the right end of the head tube 4, a limit ring 6 fixedly connected to the surface of the middle tube 1, a fixing ring 7 provided at the upper end of the limit ring 6, a threaded rod 8 threadedly connected to the inner wall of the fixing ring 7, an arc-shaped plate 9 fixedly connected to the right end of the fixing ring 7, a rear chainstay 10 fixedly connected to the end of the arc-shaped plate 9 away from the fixing ring 7, a mounting plate 11 fixedly connected to the left end of the rear chainstay 10, and a threaded rod 8 threadedly connected to the inner wall of the mounting plate 11. The fastening bolt 12 and the fixing plate 13 are fixedly connected to the surface of the fixing tube 2. When installing the arc plate 9 and the rear lower fork 10, firstly, the fixing ring 7 is placed on the surface of the intermediate tube 1 and slid downwards. The position of the fixing ring 7 is limited by the limiting ring 6 to facilitate subsequent installation. At the same time, the mounting plate 11 is aligned with the positioning plate 13 and fixed by the threaded rod 8 to the inner wall of the limiting ring 6 and the fixing ring 7. Then, the mounting plate 11 and the positioning plate 13 are fixed by the fastening bolt 12, thereby completing the installation and fixing of the arc plate 9 and the rear lower fork 10. The operation is simple and quick, and it is also convenient for subsequent disassembly and replacement, reducing maintenance costs and improving practicality.

[0032] The bottom of the fixing ring 7 contacts the top of the limiting ring 6, and the inner wall of the fixing ring 7 is slidably connected to the surface of the intermediate tube 1.

[0033] The threaded rod 8 passes through the fixed ring 7 and is threadedly connected to the inner wall of the limiting ring 6. Since the fixed ring 7 and the limiting ring 6 are threadedly connected by the threaded rod 8, it is easy to disassemble them later.

[0034] The fastening bolt 12 passes through the mounting plate 11 and is threadedly connected to the inner wall of the positioning plate 13. The mounting plate 11 and the positioning plate 13 are threadedly connected by the fastening bolt 12, which improves the efficiency of subsequent replacement.

[0035] Both the mounting plate 11 and the positioning plate 13 are arc-shaped, allowing them to fit together.

[0036] The right end of the lower tube 5 is fixedly connected to the left end of the middle tube 1.

[0037] The inner wall of the rear lower fork 10 is fixedly connected with a reinforcing rib plate 14. The reinforcing rib plate 14 fixedly connected to the inner wall of the rear lower fork 10 improves the structural strength and stability of the rear lower fork 10, thereby extending its service life.

[0038] The implementation principle of the quick-assembly structure for bicycle frames in this embodiment is as follows: When installing the arc plate 9 and the rear chainstay 10, firstly, the fixing ring 7 is placed on the surface of the middle tube 1 and slid downwards. The position of the fixing ring 7 is limited by the limiting ring 6 to facilitate subsequent installation. At the same time, the mounting plate 11 is aligned with the positioning plate 13 and fixed by the threaded rod 8 to the inner wall of the limiting ring 6 and the fixing ring 7. Then, the mounting plate 11 and the positioning plate 13 are fixed by the threaded bolt 12, thereby completing the installation and fixing of the arc plate 9 and the rear chainstay 10. The operation is simple and quick, and it is also convenient for subsequent disassembly and replacement, reducing maintenance costs and improving practicality. The rear chainstay 10 is fixedly connected to the inner wall with a reinforcing rib plate 14, which improves the structural strength and stability of the rear chainstay 10, thereby extending its service life.

[0039] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A quick assembly structure of a bicycle frame, characterized in that, The system includes an intermediate tube (1), a fixed tube (2) fixedly connected to the bottom of the intermediate tube (1), an upper tube (3) fixedly connected to the left end of the intermediate tube (1), a head tube (4) fixedly connected to the end of the upper tube (3) away from the intermediate tube (1), a lower tube (5) fixedly connected to the right end of the head tube (4), a limit ring (6) fixedly connected to the surface of the intermediate tube (1), a fixed ring (7) provided at the upper end of the limit ring (6), a threaded rod (8) threadedly connected to the inner wall of the fixed ring (7), an arc plate (9) fixedly connected to the right end of the fixed ring (7), a rear lower fork (10) fixedly connected to the end of the arc plate (9) away from the fixed ring (7), a mounting plate (11) fixedly connected to the left end of the rear lower fork (10), a fastening bolt (12) threadedly connected to the inner wall of the mounting plate (11), and a positioning plate (13) fixedly connected to the surface of the fixed tube (2).

2. The quick assembly structure of a bicycle frame according to claim 1, wherein: The bottom of the fixing ring (7) contacts the top of the limiting ring (6), and the inner wall of the fixing ring (7) is slidably connected to the surface of the intermediate tube (1).

3. The quick assembly structure of a bicycle frame as claimed in claim 1, wherein: The threaded rod (8) passes through the fixed ring (7) and is threadedly connected to the inner wall of the limiting ring (6).

4. The quick assembly structure of a bicycle frame according to claim 1, wherein: The fastening bolt (12) passes through the mounting plate (11) and is threaded to the inner wall of the positioning plate (13).

5. The quick assembly structure of a bicycle frame according to claim 4, wherein: Both the mounting plate (11) and the positioning plate (13) are arc-shaped.

6. The quick assembly structure of a bicycle frame according to claim 1, wherein: The right end of the lower tube (5) is fixedly connected to the left end of the middle tube (1).

7. The quick assembly structure of a bicycle frame according to claim 1, wherein: The inner wall of the rear lower fork (10) is fixedly connected with a reinforcing rib plate (14).

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