Front pipe group of bicycle

Abstract

The utility model relates to the field of bicycles, in particular to a bicycle front tube set which comprises a vertical tube and a front fork assembly, the front fork assembly is used for supporting and connecting a front wheel, the vertical tube is used for assembling and connecting the front fork assembly and a frame, the front fork assembly comprises a shock absorber and a front fork arm, the front fork arm is in an inverted U shape, and a mounting hole is formed in the front fork arm. A connecting block is arranged at the bottom end of the shock absorber and can be inserted into the mounting hole, the surface of the connecting block is in sliding connection with the inner wall of the mounting hole, an upper connecting pipe is arranged at the top end of the shock absorber, the upper connecting pipe is connected with the vertical pipe in a sleeving mode, quick-release fasteners are arranged on the surface of the vertical pipe and the surface of the front fork arm, and the quick-release fasteners of the vertical pipe extend to the inner wall of the vertical pipe. The quick-release fastener of the front fork arm extends to the inner wall of the mounting hole, positioning clamping grooves clamped with the quick-release fastener are formed in the surface of the connecting block and the surface of the upper connecting pipe, the front fork arm is connected with and fixes the wheel through the independent front fork arm and shock absorber structure, the shock absorber is detachably connected through the quick-release fastener, and the wheel does not need to be detached during maintenance.

Description

Technical Field

[0001] This utility model relates to the field of bicycles, and in particular to a bicycle front tube assembly. Background Technology

[0002] As a core component connecting the frame, front wheel, and steering system, the bicycle front tube assembly directly affects riding comfort and ease of maintenance. Traditional front fork assemblies typically integrate the shock absorber with the fork arm, forming a rigid connection structure through welding or bolting.

[0003] In existing technology, the lower end of the shock absorber is directly connected to the wheel axle, which means that the wheel must be removed simultaneously when disassembling the shock absorber, resulting in low maintenance efficiency. Furthermore, the bolt-fastened connection method requires special tools for disassembly and assembly, making the operation cumbersome. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a bicycle front tube assembly that can effectively solve the technical problems of complex disassembly and assembly.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A bicycle front tube assembly includes a steerer tube and a fork assembly. The fork assembly is used for supporting and connecting the front wheel, and the steerer tube is used for assembling and connecting the fork assembly to the frame. The fork assembly includes a shock absorber and a fork arm. The fork arm is in the shape of an inverted "U". A mounting hole is provided inside the fork arm. A connecting block is provided at the bottom end of the shock absorber. The connecting block can be inserted into the mounting hole. The surface of the connecting block is slidably connected to the inner wall of the mounting hole. An upper connecting tube is provided at the top end of the shock absorber. The upper connecting tube is sleeved with the steerer tube. Quick-release fasteners are provided on the surfaces of the steerer tube and the fork arm. The quick-release fasteners of the steerer tube extend to the inner wall of the steerer tube. The quick-release fasteners of the fork arm extend to the inner wall of the mounting hole. Positioning grooves that engage with the quick-release fasteners are provided on the surfaces of the connecting block and the upper connecting tube.

[0007] The quick-release fastener includes a support base and a positioning rod. The positioning rod is rotatably installed in the support base. One end of the positioning rod extends to the surface of the support base and is provided with a rotating handle. The surface of the positioning rod is provided with a clearance notch. The positioning rod can be paired and engaged with the positioning slot. When engaged, the surface of the positioning rod presses against the positioning slot, and the connecting block and the upper connecting tube can slide in the clearance notch.

[0008] Furthermore, a handlebar mounting bracket for connecting the handlebars is provided at the end of the vertical tube away from the front fork assembly.

[0009] Furthermore, the front fork arm includes two sleeves and a connecting bridge. The two sleeves are assembled through the connecting bridge. The mounting hole is located inside the sleeve, and the opening is located at the end near the connecting bridge. The end of the sleeve away from the connecting bridge is provided with a wheel mounting part.

[0010] Furthermore, the wheel mounting part is provided with symmetrical forks, and the ends of the forks are provided with threaded holes for installing wheel axle quick release rods.

[0011] Furthermore, the support base of the quick-release fastener is integrally formed with the vertical tube and the front fork arm.

[0012] Furthermore, the surfaces of the connecting block and the upper connecting tube are provided with two or more positioning slots, and the positioning rod can engage with any one of the positioning slots.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: Through an independent front fork arm and shock absorber structure, the front fork arm connects and fixes the wheel, while the shock absorber is detachably connected via quick-release fasteners. During maintenance, the shock absorber can be directly removed from the front fork arm without disassembling the wheel. The matching structure of the positioning rod and positioning slot allows for manual operation; simply rotating the handle 180° completes locking and releasing, improving efficiency compared to traditional bolt connections. The standardized mounting holes and connecting block dimensions can accommodate shock absorbers of different specifications, expanding the adaptability of the front tube assembly for retrofitting. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the existing technology;

[0015] Figure 2 This is the front view of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of this utility model;

[0017] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0018] The numbers in the diagram are: 1-Vertical tube, 2-Upper connecting tube, 3-Shock absorber, 4-Front fork arm, 401-Sleeve, 402-Connecting bridge, 403-Mounting hole, 404-Wheel mounting part, 5-Quick release fastener, 501-Support seat, 502-Positioning rod, 503-Rotating handle, 504-Avoidance notch, 6-Connecting block, 7-Positioning slot. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The following is combined with Figures 1-4A detailed description of a bicycle front tube assembly according to this utility model is provided below:

[0021] A bicycle front tube assembly includes a steerer tube 1 and a fork assembly. The fork assembly supports and connects the front wheel, and the steerer tube 1 connects the fork assembly to the frame. The fork assembly includes a shock absorber 3 and a fork arm 4. The fork arm 4 is inverted "U" shape and has a mounting hole 403. A connecting block 6 is provided at the bottom of the shock absorber 3, which can be inserted into the mounting hole 403. The surface of the connecting block 6 is slidably connected to the inner wall of the mounting hole 403. An upper connecting tube 2 is provided at the top of the shock absorber 3, which is sleeved with the steerer tube 1. The surfaces of the steerer tube 1 and the fork arm 4 are connected. The front fork arm 4 is equipped with quick-release fasteners 5 on all surfaces. The quick-release fasteners 5 of the vertical tube 1 extend to the inner wall of the vertical tube 1, and the quick-release fasteners 5 of the front fork arm 4 extend to the inner wall of the mounting hole 403. The surfaces of the connecting block 6 and the upper connecting tube 2 are provided with positioning grooves 7 that engage with the quick-release fasteners 5. The front fork arm 4 includes two sleeves 401 and a connecting bridge 402. The two sleeves 401 are assembled through the connecting bridge 402. The mounting hole 403 is located inside the sleeve 401, and the opening is located at the end near the connecting bridge 402. The end of the sleeve 401 away from the connecting bridge 402 is provided with a wheel mounting part 404. The wheel mounting part 404 is provided with symmetrical fork legs, and the ends of the fork legs are provided with threaded holes for installing wheel axle quick-release rods.

[0022] The quick-release fastener 5 includes a support base 501 and a positioning rod 502. The positioning rod 502 is rotatably installed in the support base 501. One end of the positioning rod 502 extends to the surface of the support base 501 and is provided with a rotating handle 503. The surface of the positioning rod 502 is provided with an avoidance notch 504. The positioning rod 502 can be paired and engaged with the positioning slot 7. When engaged, the surface of the positioning rod 502 presses against the positioning slot 7. The connecting block 6 and the upper connecting tube 2 can slide in the avoidance notch 504. The support base 501 of the quick-release fastener 5 is integrally formed with the vertical tube 1 and the front fork arm 4.

[0023] The independent front fork arm 4 and shock absorber 3 structure connects and fixes the wheel, while the shock absorber 3 is detachably connected via quick-release fasteners 5. During maintenance, the shock absorber 3 can be directly removed from the front fork arm 4 without disassembling the wheel. The mating structure of the positioning rod 502 and positioning slot 7 allows for manual operation; simply rotating the handle 503 180° locks and releases the shock absorber, improving efficiency compared to traditional bolt connections. The standardized mounting hole 403 and connecting block 6 can accommodate shock absorbers of different specifications, expanding the adaptability of the front tube assembly for retrofitting.

[0024] The end of the vertical tube 1 away from the front fork assembly is provided with a handlebar mounting bracket for connecting the handlebars. By integrating the handlebar mounting bracket at the top of the vertical tube 1, the steering system and the shock absorption system are structurally separated, reducing the handlebar vibration transmission rate by about 40%, while avoiding the installation axis deviation problem caused by the traditional split design.

[0025] The surfaces of the connecting block 6 and the upper connecting pipe 2 are provided with two or more positioning slots 7. The positioning rod 502 can engage with any one of the positioning slots 7. The multi-level positioning slot design allows for adjustment of the insertion depth of the shock absorber 3, realizing mechanical graded adjustment of the suspension stiffness to meet the needs of different road conditions such as off-road and urban driving.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A bicycle front tube assembly, comprising a seat tube and a front fork assembly, the front fork assembly serving as a support connection for the front wheel, and the seat tube serving as a connection between the front fork assembly and the frame, characterized in that: The fork assembly includes a shock absorber and a fork arm. The fork arm is in the shape of an inverted "U". A mounting hole is provided inside the fork arm. A connecting block is provided at the bottom of the shock absorber. The connecting block can be inserted into the mounting hole. The surface of the connecting block is slidably connected to the inner wall of the mounting hole. An upper connecting tube is provided at the top of the shock absorber. The upper connecting tube is sleeved with a vertical tube. Quick-release fasteners are provided on the surfaces of both the vertical tube and the fork arm. The quick-release fasteners of the vertical tube extend to the inner wall of the vertical tube. The quick-release fasteners of the fork arm extend to the inner wall of the mounting hole. Positioning grooves that engage with the quick-release fasteners are provided on the surfaces of both the connecting block and the upper connecting tube. The quick-release fastener includes a support base and a positioning rod. The positioning rod is rotatably installed in the support base. One end of the positioning rod extends to the surface of the support base and is provided with a rotating handle. The surface of the positioning rod is provided with a clearance notch. The positioning rod can be paired and engaged with the positioning slot. When engaged, the surface of the positioning rod presses against the positioning slot, and the connecting block and the upper connecting tube can slide in the clearance notch.

2. The bicycle front tube assembly according to claim 1, characterized in that: The end of the vertical tube furthest from the fork assembly is provided with a handlebar mounting bracket for connecting the handlebars.

3. The bicycle front tube assembly according to claim 1, characterized in that: The front fork arm includes two sleeves and a connecting bridge. The two sleeves are assembled through the connecting bridge. The mounting hole is located inside the sleeve, and the opening is located at the end near the connecting bridge. The end of the sleeve away from the connecting bridge is provided with a wheel mounting part.

4. A bicycle front tube assembly according to claim 3, characterized in that: The wheel mounting section is provided with symmetrical forks, and the ends of the forks are provided with threaded holes for installing wheel axle quick release rods.

5. A bicycle front tube assembly according to any one of claims 1-4, characterized in that: The support base of the quick-release fastener is integrally formed with the vertical tube and the front fork arm.

6. A bicycle front tube assembly according to any one of claims 1-4, characterized in that: The surfaces of the connecting block and the upper connecting pipe are provided with two or more positioning slots, and the positioning rod can engage with any one of the positioning slots.

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