Bicycle chain wheel crank fixing structure

Abstract

The utility model relates to the technical field of bicycle chain wheel crank fixing, in particular to a bicycle chain wheel crank fixing structure, and solves the technical problems that when a bicycle is assembled, a crank needs to be stably fixed on one side of a bicycle chain wheel, but most bicycle chain wheel crank fixing structures often need to be assembled with the help of tools, and the assembling efficiency is high. Certain operation time needs to be consumed, the structural stability is difficult to guarantee, and the use flexibility of crank disassembly and assembly is affected due to inconvenience in crank disassembly and assembly. According to the technical scheme, the bicycle chain wheel crank fixing structure comprises a telescopic assembly, a rotating assembly and a fixing assembly; compared with a traditional bicycle chain wheel crank fixing structure, the bicycle chain wheel crank fixing structure has the advantages that the fixing structure is simple, operators often need to carry out fixing operation with the help of tools, and the bicycle chain wheel crank fixing structure is inconvenient to use, disassembly and assembly operation steps are simplified in an automatic clamping and fixing mode, operation is easy, convenient and labor-saving, operation time is effectively saved, and work efficiency is improved. The practical value of the bicycle is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle sprocket crank fixing, in particular to a bicycle sprocket crank fixing structure. Background Art

[0002] The bicycle sprocket crank is an important part of the bicycle. It is mainly composed of a crank and a sprocket. The crank is used to connect the pedals, and the sprocket is fixed on the crank, which transmits power to the rear wheel through the chain. Choosing a suitable bicycle sprocket crank can be determined according to riding needs. For example, mountain bikes, road bikes or commuter bikes may require sprocket cranks of different designs. The design of the bicycle sprocket crank does have a significant impact on riding efficiency and comfort. Choosing a suitable crank length and number of sprocket teeth can be determined according to riding needs and personal preferences. In order to ensure riding safety, the crank needs to be stably fixed to the sprocket. However, most bicycle sprocket cranks have a fixed structure, and the fixing structure is relatively simple. Operators often need to use tools to perform fixing operations, which is inconvenient to use. Utility Model Content

[0003] In order to overcome the fixed structure of most bicycle sprocket cranks, tools are often needed for assembly work, which makes it inconvenient to disassemble and assemble the cranks, resulting in a certain amount of operation time being consumed, making it difficult to ensure structural stability and affecting the flexibility of crank disassembly and assembly.

[0004] The technical solution of the utility model is: a bicycle sprocket crank fixing structure, comprising a sprocket body, a first fixing component, a first telescopic component, a second telescopic component, a first rotating component, a second fixing component and a second rotating component; the first fixing component is arranged on one side of the sprocket body, the first telescopic component is arranged on one side of the first fixing component, the second telescopic component is arranged on one side of the first telescopic component, two groups of the second telescopic components are arranged, the second fixing component is arranged on one end of the second telescopic component, the first rotating component is arranged on the other side of the first fixing component, and the second rotating component is arranged on one side of the first rotating component.

[0005] Preferably, the sprocket body is set to fix the installation position of the first fixed component, the first telescopic component is used to adjust the height of the second fixed component, the second telescopic component is used to adjust the position of the second fixed component, the second fixed component is connected and fixed by the second fixed component, the position of the first rotating component is fixed by the first fixed component, and the sprocket body is rotatably connected by the first rotating component, so that the sprocket body and the first fixed component are rotatably connected to each other, the first rotating component is rotated to drive the second rotating component to rotate synchronously, and the position of the first rotating component is fixed by the second rotating component, thereby simplifying the disassembly and assembly steps, making the operation simple and labor-saving, effectively saving the operation time, and enhancing the practical value of the bicycle.

[0006] Preferably, the first fixing component includes a crank body, an annular groove and an annular block; the crank body is provided on one side of the sprocket body, an annular block is provided on one side of the crank body, an annular groove is provided on one side of the sprocket body, and the annular groove and the annular block are engaged with each other; the annular block is fixed by the crank body, and the annular groove is used to determine the engagement position of the annular block, and the connection position of the crank body and the sprocket body is preliminarily fixed by engaging the annular block with the annular groove.

[0007] Preferably, the first telescopic assembly includes a first electric telescopic rod and a first fixed block; the first electric telescopic rod is arranged on one side of the annular groove, and the first fixed block is arranged at one end of the first electric telescopic rod; the height of the first fixed block is flexibly adjusted by telescoping the first electric telescopic rod, and the second telescopic assembly is connected and fixed by using the first fixed block.

[0008] Preferably, the second telescopic assembly includes a second electric telescopic rod and a second fixed block; a second electric telescopic rod is arranged on one side of the first fixed block, two groups of second electric telescopic rods are arranged, and a second fixed block is arranged at one end of the second electric telescopic rod; the position of the second fixed block is adjusted by telescoping the second electric telescopic rod, and the position of the second fixed assembly is fixed by the second fixed block.

[0009] Preferably, the first rotating component includes an annular groove and a ring block; an annular groove is opened on one side of the crank body, and a ring block is arranged on the inner side of the annular groove, and the ring block and the annular groove are rotatably connected to each other; the rotation position of the ring block is clearly defined by the annular groove, and the rotating ring block drives the second rotating component to rotate synchronously, thereby ensuring that the sprocket body and the crank body are stably rotatably connected to each other.

[0010] Preferably, the second fixing component includes a positioning block and a positioning groove; a positioning block is provided on one side of the second fixing block, and a positioning groove is provided on one side of the ring block, and two groups of positioning grooves are provided, and the positioning grooves and the positioning block are interlocked with each other; the position of the positioning block is clearly defined by the positioning groove, and the positioning block is inserted into the positioning groove, thereby achieving the effect of stably fixing the crank body.

[0011] Preferably, the second rotating component includes a T-shaped slide groove and a T-shaped slider; a T-shaped slide groove is opened on one side of the ring slide groove, and a T-shaped slider is arranged on one side of the ring block, the T-shaped slider and the T-shaped slide groove are interlocked with each other, and the T-shaped slider and the T-shaped slide groove are rotatably connected to each other; the rotation range of the T-shaped slider is clarified by the T-shaped slide groove, and the position of the ring block is fixed by the T-shaped slider, thereby achieving the effect of ensuring that the ring block rotates stably and synchronously with the sprocket body.

[0012] Beneficial effects of the utility model:

[0013] 1. Compared with the traditional bicycle sprocket crank fixing structure, most of them use bolts to fix the crank position, and often need to use tools for assembly. It is inconvenient to disassemble and assemble the crank, which takes a certain amount of time and is difficult to ensure the stability of the structure. The automatic clamping and fixing method simplifies the disassembly and assembly steps, making the operation simple and labor-saving, effectively saving working time, and enhancing the practical value of the bicycle;

[0014] 2. When fixing the crank body, the first electric telescopic rod is extended and retracted to adjust the height of the first fixed block, driving the height adjustment of the positioning block, and the second electric telescopic rod is extended and retracted to adjust the position of the second fixed block, driving the position of the positioning block to move, so that the positioning block is flexibly embedded in the positioning groove on the ring block, so as to solve the problem that the fixing structure of most bicycle sprocket cranks is relatively simple, and the operator often needs to use tools to perform the fixing operation, which is inconvenient to use, and enhance the flexibility of the crank disassembly and assembly;

[0015] 3. When rotating the sprocket body, align one end of the crank body with the sprocket body, insert the annular clamping block into the annular clamping groove, and after stably fixing the crank body to the sprocket body, rotate the sprocket body to drive the positioning block to rotate synchronously, thereby driving the annular block in the annular groove to rotate synchronously. At the same time, rotating the annular block drives the T-shaped slider to rotate stably in the T-shaped groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of a bicycle sprocket crank fixing structure of the utility model;

[0017] Figure 2 Shown is a three-dimensional structural schematic diagram of a telescopic component of a bicycle sprocket crank fixing structure of the utility model;

[0018] Figure 3 The present invention is a schematic diagram of the three-dimensional structure of a first rotating assembly of a bicycle sprocket crank fixing structure;

[0019] Figure 4 What is shown is a three-dimensional structural schematic diagram of a second rotating component of a bicycle sprocket crank fixing structure of the utility model.

[0020] Explanation of the accompanying drawings: 1. sprocket body; 2. first fixed component; 3. first telescopic component; 4. second telescopic component; 5. first rotating component; 6. second fixed component; 7. second rotating component; 201. crank body; 202. annular groove; 203. annular block; 301. first electric telescopic rod; 302. first fixed block; 401. second electric telescopic rod; 402. second fixed block; 501. annular groove; 502. ring block; 601. positioning block; 602. positioning groove; 701. T-shaped groove; 702. T-shaped slider. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1 The utility model provides an embodiment: a bicycle sprocket crank fixing structure, comprising a sprocket body 1, a first fixing component 2, a first telescopic component 3, a second telescopic component 4, a first rotating component 5, a second fixing component 6 and a second rotating component 7; the first fixing component 2 is arranged on one side of the sprocket body 1, the first telescopic component 3 is arranged on one side of the first fixing component 2, the second telescopic component 4 is arranged on one side of the first telescopic component 3, the second telescopic component 4 is arranged in two groups, the second fixing component 6 is arranged on one end of the second telescopic component 4, the first fixing component 2 is arranged on the other side of the first rotating component 5, and the second rotating component 7 is arranged on one side of the first rotating component 5.

[0023] See also Figure 2-3 In this embodiment, the first fixing component 2 includes a crank body 201, an annular groove 202 and an annular block 203; the crank body 201 is provided on one side of the sprocket body 1, and the annular block 203 is provided on one side of the crank body 201. The annular groove 202 is provided on one side of the sprocket body 1. The annular groove 202 and the annular block 203 are engaged with each other. The annular block 203 is fixed by the crank body 201, and the engagement position of the annular block 203 is determined by the annular groove 202. By engaging the annular block 203 with the annular groove 202, the crank body 201 and the sprocket body 1 are preliminarily fixed.

[0024] The first telescopic assembly 3 includes a first electric telescopic rod 301 and a first fixed block 302; the first electric telescopic rod 301 is arranged on one side of the annular slot 202, and the first fixed block 302 is arranged on one end of the first electric telescopic rod 301. The height of the first fixed block 302 can be flexibly adjusted by telescoping the first electric telescopic rod 301, and the first fixed block 302 is used to connect and fix the second telescopic assembly 4; the second telescopic assembly 4 includes a second electric telescopic rod 401 and a second fixed block 402; the second electric telescopic rod 401 is arranged on one side of the first fixed block 302, and the second electric telescopic rod 401 is arranged in two groups, and the second fixed block 402 is arranged on one end of the second electric telescopic rod 401. The position of the second fixed block 402 is adjusted by telescoping the second electric telescopic rod 401, and the position of the second fixed assembly 6 is fixed by the second fixed block 402; the first rotating assembly 5 includes an annular slot 202. Slide groove 501 and ring block 502; an annular slide groove 501 is provided on one side of the crank body 201, and a ring block 502 is provided on the inner side of the annular slide groove 501. The ring block 502 is rotatably connected with the annular slide groove 501, and the rotation position of the ring block 502 is determined by the annular slide groove 501. The rotating ring block 502 drives the second rotating component 7 to rotate synchronously, thereby ensuring that the sprocket body 1 and the crank body 201 are stably rotatably connected to each other; the second fixed component 6 includes a positioning block 601 and a positioning groove 602; a positioning block 601 is provided on one side of the second fixed block 402, and a positioning groove 602 is provided on one side of the ring block 502. The positioning groove 602 is provided with two groups, and the positioning groove 602 and the positioning block 601 are interlocked with each other. The position of the positioning block 601 is determined by the positioning groove 602, and the positioning block 601 is inserted into the positioning groove 602, thereby achieving the effect of stably fixing the crank body 201.

[0025] See also Figure 4 In this embodiment, the second rotating component 7 includes a T-shaped groove 701 and a T-shaped slider 702; a T-shaped groove 701 is provided on one side of the annular groove 501, and a T-shaped slider 702 is provided on one side of the ring block 502. The T-shaped slider 702 and the T-shaped groove 701 are interlocked with each other, and the T-shaped slider 702 and the T-shaped groove 701 are rotatably connected to each other. The rotation range of the T-shaped slider 702 is clarified by the T-shaped groove 701, and the position of the ring block 502 is fixed by the T-shaped slider 702, thereby achieving the effect of ensuring that the ring block 502 rotates stably and synchronously with the sprocket body 1.

[0026] When the crank body 201 is initially installed, the second electric telescopic rod 401 is retracted to reduce the distance between the two sets of positioning blocks 601 on the second fixed block 402, one end of the crank body 201 is aligned with the sprocket body 1, and the annular clamping block 203 is clamped into the annular clamping groove 202;

[0027] When fixing the crank body 201, the second electric telescopic rod 401 is extended to adjust the positions of the two sets of positioning blocks 601, so that the positioning blocks 601 are moved to just above the positioning grooves 602, and then the first electric telescopic rod 301 is retracted to adjust the height of the first fixing block 302, and the positioning blocks 601 are inserted into the positioning grooves 602;

[0028] When the sprocket body 1 is rotated, the rotating sprocket body 1 drives the positioning block 601 to rotate synchronously, thereby driving the ring block 502 in the annular groove 501 to rotate synchronously. At the same time, the rotating ring block 502 drives the T-shaped slider 702 to rotate stably in the T-shaped groove 701.

[0029] Through the above steps, the installation position of the first fixed component 2 is fixed by setting the sprocket body 1, the height of the second fixed component 6 is adjusted by the first telescopic component 3, the position of the second fixed component 6 is adjusted by the second telescopic component 4, the second fixed component 6 is connected and fixed by the second fixed component 6, the position of the first rotating component 5 is fixed by the first fixed component 2, and the sprocket body 1 is rotationally connected by the first rotating component 5, so that the sprocket body 1 and the first fixed component 2 are rotatably connected to each other, and the first rotating component 5 is rotated to drive the second rotating component 7 to rotate synchronously, and the position of the first rotating component 5 is ensured to be fixed by the second rotating component 7.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A bicycle sprocket crank fixing structure, comprising a sprocket body (1); characterized in that: The sprocket body (1) further comprises a first fixed component (2), a first telescopic component (3), a second telescopic component (4), a first rotating component (5), a second fixed component (6) and a second rotating component (7); the first fixed component (2) is arranged on one side of the sprocket body (1); the first telescopic component (3) is arranged on one side of the first fixed component (2); the second telescopic component (4) is arranged on one side of the first telescopic component (3); two groups of the second telescopic components (4) are arranged; the second fixed component (6) is arranged at one end of the second telescopic component (4); the first rotating component (5) is arranged on the other side of the first fixed component (2); and the second rotating component (7) is arranged on one side of the first rotating component (5).

2. A bicycle sprocket crank fixing structure according to claim 1, characterized in that: The first fixing assembly (2) comprises a crank body (201), an annular clamping groove (202) and an annular clamping block (203); the crank body (201) is arranged on one side of the sprocket body (1), the annular clamping block (203) is arranged on one side of the crank body (201), and the annular clamping groove (202) is opened on one side of the sprocket body (1), and the annular clamping groove (202) and the annular clamping block (203) are mutually engaged.

3. A bicycle sprocket crank fixing structure according to claim 2, characterized in that: The first telescopic assembly (3) comprises a first electric telescopic rod (301) and a first fixing block (302); the first electric telescopic rod (301) is arranged on one side of the annular slot (202), and the first fixing block (302) is arranged on one end of the first electric telescopic rod (301).

4. A bicycle sprocket crank fixing structure according to claim 3, characterized in that: The second telescopic assembly (4) comprises a second electric telescopic rod (401) and a second fixed block (402); the second electric telescopic rod (401) is arranged on one side of the first fixed block (302), the second electric telescopic rod (401) is arranged in two groups, and the second fixed block (402) is arranged on one end of the second electric telescopic rod (401).

5. The bicycle sprocket crank fixing structure according to claim 3, characterized in that: The first rotating assembly (5) comprises an annular sliding groove (501) and an annular block (502); an annular sliding groove (501) is provided on one side of the crank body (201), an annular block (502) is provided inside the annular sliding groove (501), and the annular block (502) and the annular sliding groove (501) are rotatably connected to each other.

6. A bicycle sprocket crank fixing structure according to claim 5, characterized in that: The second fixing assembly (6) comprises a positioning block (601) and a positioning groove (602); a positioning block (601) is arranged on one side of the second fixing block (402), a positioning groove (602) is provided on one side of the ring block (502), two groups of positioning grooves (602) are provided, and the positioning grooves (602) and the positioning block (601) are interlocked.

7. The bicycle sprocket crank fixing structure according to claim 5, characterized in that: The second rotating assembly (7) comprises a T-shaped slide groove (701) and a T-shaped slider (702); a T-shaped slide groove (701) is provided on one side of the annular slide groove (501), a T-shaped slider (702) is provided on one side of the ring block (502), the T-shaped slider (702) and the T-shaped slide groove (701) are interlocked, and the T-shaped slider (702) and the T-shaped slide groove (701) are rotatably connected to each other.

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