Bicycle chain wheel crank with fine adjustment structure

Abstract

The utility model relates to the technical field of bicycle chain wheel cranks, and discloses a bicycle chain wheel crank with a fine adjustment structure, which comprises a chain wheel, a mounting sleeve penetrates through the middle of the chain wheel and is in interference fit connection with the chain wheel, and mounting parts are symmetrically and slidably connected to the front side and the rear side of the interior of the mounting sleeve. And convex pieces are symmetrically arranged at the top and the bottom of the mounting sleeve, first threaded holes are formed in the convex pieces, cranks are arranged on the opposite sides of the two mounting pieces, convex blocks are symmetrically arranged at the tops and the bottoms of the mounting pieces, and rotating shafts penetrate through the convex blocks and are rotationally connected with the convex blocks. The rotating shaft is rotated to drive the first threaded shaft to rotate, the position of the first threaded shaft in the first threaded hole can be adjusted, the position of the installation piece in the installation sleeve can be adjusted, the distance between the two cranks can be conveniently adjusted, the opening distance of the two riding feet of a rider can be finely adjusted according to personal needs, and the riding comfort of the rider is improved. And the use flexibility is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bicycle chain wheel curve technical field, concretely is a bicycle chain wheel crank with fine adjustment structure. BACKGROUND

[0002] Bicycle is also called as pedaled vehicle or bicycle, is a kind of mechanical transmission with human power, bicycle can be used to walk, more and more people use bicycle as fitness equipment to ride and exercise, bicycle outing, bicycle is also a sports competition, there are road bicycle race, mountain bicycle race, track bicycle race, stunt bicycle competition etc.;Chain wheel crank is an important component of bicycle, after installing pedal, the bicycle can transmit the force of foot to chain wheel crank through pedal, and chain wheel crank converts the force of foot into the driving force of bicycle wheel rotation.

[0003] The patent document with the announcement number CN219687547U disclosed a bicycle chain wheel crank with fine adjustment structure, the patent document is disclosed by being provided with positioning mechanism, by the mutual cooperation of sliding seat, extruding block and second toothed plate, in the process of adjusting movable plate, under the elastic action of spring, extruding block can exert pressure on second toothed plate, so that second toothed plate and first toothed plate are continuously engaged, so that movable sleeve can be positioned during adjustment, improve the stability when adjusting movable plate;But the above-mentioned patent document can only fine tune the length of crank itself, and cannot fine tune the distance between two cranks, that is, cannot fine tune the distance between two riding feet of rider according to personal needs, and the flexibility of use is low. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a bicycle chain wheel crank with fine adjustment structure, solves the problem proposed in the background art.

[0005] The application embodiment provides a bicycle chain wheel crank with fine adjustment structure, including chain wheel, the chain wheel is connected with the installation sleeve in the middle and is connected with the installation sleeve by interference fit, the inside of the installation sleeve is symmetrically connected with the installation piece that slides in front and back, and the top and bottom of the installation sleeve are symmetrically provided with convex pieces, the convex pieces are provided with threaded holes one, the opposite sides of the two installation pieces are provided with cranks, and the top and bottom of the installation piece are symmetrically provided with convex blocks, the convex blocks are connected with the rotating shafts in penetration and rotation, one end of the rotating shaft is fixedly connected with the threaded shaft one matched with the threaded hole one, and one end of the threaded shaft one is in the inside of the threaded hole one.

[0006] By adopting the technical scheme, the rotating rotating shaft drives the threaded shaft to rotate to adjust the position of the threaded shaft one inside the threaded hole one, thereby adjusting the position of the mounting piece inside the mounting sleeve, so as to adjust the distance between the two cranks, thereby fine-tuning the distance between the two riding feet of the rider according to the needs of the individual, and increasing the flexibility of use.

[0007] Optionally, the crank includes a front crank and a rear crank, the front crank is welded on the mounting piece, a threaded hole two is formed on one side of the front crank, an adjusting groove matched with the front crank is formed on one side of the rear crank, and a threaded shaft two is rotatably connected to the other side of the rear crank, the one side of the front crank is inside the adjusting groove, and the front crank is slidably connected with the adjusting groove, one end of the threaded shaft two is inside the threaded hole two, and the threaded shaft two is threadedly connected with the threaded hole two.

[0008] By adopting the technical scheme, rotating the threaded shaft two can adjust the position of the front crank inside the adjusting groove through the threaded hole two, so as to adjust the overall length of the crank, thereby fine-tuning the distance between the two riding feet of the rider according to the needs of the individual, and further increasing the flexibility of use.

[0009] Optionally, one end of the rotating shaft is fixedly connected with a disc one, an internal hexagonal groove one is formed on the disc one, one end of the threaded shaft two is fixedly connected with a disc two, and an internal hexagonal groove two is formed on the disc two.

[0010] By adopting the technical scheme, it is convenient to use an internal hexagonal wrench to rotate the threaded shaft one and the threaded shaft two.

[0011] Optionally, two sliding holes are formed on one side of the front crank, two sliding shafts matched with the sliding holes are fixedly connected inside the adjusting groove, and one end of the sliding shaft is inside the sliding hole and slidably connected with the sliding hole.

[0012] By adopting the technical scheme, the limiting action between the sliding shaft and the sliding hole ensures the stability of the adjustment between the front crank and the rear crank.

[0013] Optionally, the protruding piece and the mounting sleeve are integrally formed by casting, and the protruding block and the mounting piece are integrally formed by casting.

[0014] By adopting the technical scheme, the integrally formed protruding piece, mounting sleeve, protruding block and mounting piece ensure the strength of the connection between the crank and the sprocket.

[0015] Optionally, the other end of the rear crank away from the front crank is fixedly connected with a pedal mounting piece.

[0016] By adopting the technical scheme, it is convenient to install the bicycle pedal.

[0017] Optionally, the sprocket is provided with a plurality of through holes.

[0018] By adopting the above technical scheme, the weight of the sprocket itself is reduced.

[0019] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0020] 1. The technical scheme of the present application adjusts the position of the threaded shaft one inside the threaded hole one by rotating the threaded shaft one, thereby adjusting the position of the mounting piece inside the mounting sleeve, so as to adjust the distance between the two cranks, thereby fine-tuning the distance between the two riding feet of the rider according to individual needs, and increasing the flexibility of use.

[0021] 2. The technical scheme of the present application adjusts the position of the front crank inside the adjusting groove through the threaded hole two by rotating the threaded shaft two, due to the sliding connection between the front crank and the adjusting groove, so as to adjust the overall length of the crank, thereby fine-tuning the distance between the two riding feet of the rider according to individual needs, and further increasing the flexibility of use. BRIEF DESCRIPTION OF DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, with reference to the accompanying drawings:

[0023] Figure 1 is a structural schematic view of the present application;

[0024] Figure 2 is a structural schematic view of the present application from the side of the mounting sleeve;

[0025] Figure 3 is a front view of the present application with the front crank and the rear crank split;

[0026] Figure 4 is a side view of the present application with the front crank and the rear crank split.

[0027] In the drawings: 1, sprocket; 2, mounting sleeve; 3, mounting piece; 4, front crank; 5, rear crank; 6, pedal mounting piece; 7, through hole; 8, protruding piece; 9, threaded hole one; 10, protruding block; 11, rotating shaft; 12, threaded shaft one; 13, disc one; 14, internal hexagonal groove one; 15, threaded hole two; 16, sliding hole; 17, disc two; 18, internal hexagonal groove two; 19, adjusting groove; 20, threaded shaft two; 21, sliding shaft. DETAILED DESCRIPTION

[0028] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0029] Please refer to Figures 1-2 The utility model provides a bicycle sprocket crank with fine adjustment structure, including sprocket 1, the equal intermediate of sprocket 1 is connected with the mounting sleeve 2 of interference fit and passes through, the inside of mounting sleeve 2 is symmetrically connected with mounting piece 3 of inside front and back slide, and the top and bottom of mounting sleeve 2 are provided with convex piece 8 symmetrically, is equipped with threaded hole one 9 on convex piece 8, the opposite side of two mounting piece 3 is provided with crank, and the top and bottom of mounting piece 3 are provided with lug 10 symmetrically, lug 10 is connected with rotating shaft 11 through and rotates at the top, one end of rotating shaft 11 is fixedly connected with the threaded shaft one 12 matched with threaded hole one 9, and one end of threaded shaft one 12 is in the inside of threaded hole one 9;

[0030] In this technical scheme, rotating shaft 11 is rotated to drive threaded shaft one 12 to rotate, the position of threaded shaft one 12 in threaded hole one 9 is adjusted, the position of mounting piece 3 in mounting sleeve 2 is adjusted, the distance between two cranks is adjusted, the distance between two riding feet of a rider can be fine adjusted according to personal needs, and the flexibility of use is increased.

[0031] In some technical solutions, as shown in Figure 1 , Figure 3 and Figure 4 , the crank includes front crank 4 and rear crank 5, the front crank 4 is welded on the mounting piece 3, one side of the front crank 4 is provided with threaded hole two 15, one side of the rear crank 5 is provided with adjusting groove 19 matched with the front crank 4, the other side of the rear crank 5 is connected with threaded shaft two 20 through and rotates, one side of the front crank 4 is in the inside of the adjusting groove 19, the front crank 4 is connected with the adjusting groove 19, one end of the threaded shaft two 20 is in the inside of the threaded hole two 15, and the threaded shaft two 20 is connected with the threaded hole two 15.

[0032] When in use, rotating the threaded shaft two 20, because of the sliding connection between the front crank 4 and the adjusting groove 19, the position of the front crank 4 in the adjusting groove 19 can be adjusted through the threaded hole two 15, so as to adjust the overall length of the crank, the distance between the two riding feet of a rider can be fine adjusted according to personal needs, and the flexibility of use is further increased.

[0033] In some technical solutions, as shown in Figures 2-4As shown, one end of the rotating shaft 11 is fixedly connected with a disc 13, the disc 13 is provided with an internal hexagonal groove 14, one end of the threaded shaft 20 is fixedly connected with a disc 17, and the disc 17 is provided with an internal hexagonal groove 18.

[0034] In use, the internal hexagonal groove 14 on the disc 13 and the internal hexagonal groove 18 on the disc 17 are used to facilitate the rotation of the threaded shaft 12 and the threaded shaft 20 by using an internal hexagonal wrench.

[0035] In some technical solutions, as shown in Figure 3 and Figure 4 A side of the front crank 4 is provided with two sliding holes 16, the inside of the adjusting groove 19 is fixedly connected with two sliding shafts 21 matched with the sliding holes 16, one end of the sliding shaft 21 is inside the sliding hole 16, and the sliding shaft 21 is in sliding connection with the sliding hole 16.

[0036] In use, the sliding shaft 21 and the sliding hole 16 limit each other to ensure the stability of the adjustment between the front crank 4 and the rear crank 5.

[0037] In some technical solutions, as shown in Figures 1-2 The protruding piece 8 and the mounting sleeve 2 are integrally formed by casting, and the protruding block 10 and the mounting piece 3 are integrally formed by casting.

[0038] In use, the protruding piece 8 and the mounting sleeve 2 and the protruding block 10 and the mounting piece 3 integrally formed by casting ensure the strength of the connection between the crank and the chain wheel 1.

[0039] In some technical solutions, as shown in Figure 1 The rear crank 5 is fixedly connected with a pedal mounting piece 6 away from the front crank 4.

[0040] In use, the pedal mounting piece 6 facilitates the installation of the bicycle pedal.

[0041] In some technical solutions, as shown in Figure 1 The chain wheel 1 is provided with a plurality of through holes 7.

[0042] In use, the plurality of through holes 7 on the chain wheel 1 reduce the weight of the chain wheel 1 itself.

[0043] Working principle: in the use process, insert the hexagonal wrench into the hexagonal groove one 14 to rotate the disc one 13, the disc one 13 drives the threaded shaft one 12 to rotate through the rotating shaft 11, that is, the position of the threaded shaft one 12 in the threaded hole one 9 can be adjusted, so as to adjust the position of the mounting piece 3 in the mounting sleeve 2, so as to adjust the distance between the two cranks, so that the distance between the two riding feet of the rider can be fine adjusted according to the individual needs, insert the hexagonal wrench into the hexagonal groove two 18 to rotate the disc two 17, the disc two 17 drives the threaded shaft two 20 to rotate, because of the sliding connection between the front crank 4 and the adjusting groove 19, the position of the front crank 4 in the adjusting groove 19 can be adjusted through the threaded hole two 15, so as to adjust the overall length of the crank, so that the distance between the two riding feet of the rider can be fine adjusted according to the individual needs, further increasing the flexibility of use.

[0044] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A bicycle sprocket crank with a fine adjustment structure, comprising a sprocket (1), characterized in that: The chain wheel (1) is connected with the mounting sleeve (2) through the equal intermediate penetration and interference fit, the mounting sleeve (2) is symmetrically and slidably connected with the mounting piece (3) inside, the top and bottom of the mounting sleeve (2) are symmetrically provided with the convex piece (8), the convex piece (8) is provided with the threaded hole one (9), the opposite sides of the two mounting pieces (3) are provided with the crank, the top and bottom of the mounting piece (3) are symmetrically provided with the protruding block (10), the protruding block (10) is rotatably connected with the rotating shaft (11) penetrating through, one end of the rotating shaft (11) is fixedly connected with the threaded shaft one (12) matched with the threaded hole one (9), and one end of the threaded shaft one (12) is located inside the threaded hole one (9).

2. A bicycle sprocket crank with fine adjustment structure according to claim 1, characterized in that, The crank comprises the front crank (4) and the rear crank (5), the front crank (4) is welded on the mounting piece (3), one side of the front crank (4) is provided with the threaded hole two (15), one side of the rear crank (5) is provided with the adjusting groove (19) matched with the front crank (4), and the other side of the rear crank (5) is rotatably connected with the threaded shaft two (20) penetrating through, one side of the front crank (4) is located inside the adjusting groove (19), the front crank (4) is slidably connected with the adjusting groove (19), one end of the threaded shaft two (20) is located inside the threaded hole two (15), and the threaded shaft two (20) is threadedly connected with the threaded hole two (15).

3. A bicycle sprocket crank with fine adjustment structure according to claim 2, characterized in that, One end of the rotating shaft (11) is fixedly connected with the disc one (13), the disc one (13) is provided with the internal hexagonal groove one (14), one end of the threaded shaft two (20) is fixedly connected with the disc two (17), and the disc two (17) is provided with the internal hexagonal groove two (18).

4. The bicycle sprocket crank with fine adjustment structure according to claim 2, characterized in that, One side of the front crank (4) is provided with the two sliding holes (16), the adjusting groove (19) is fixedly connected with the two sliding shafts (21) matched with the sliding holes (16) inside, one end of the sliding shaft (21) is located inside the sliding hole (16), and the sliding shaft (21) is slidably connected with the sliding hole (16).

5. The bicycle sprocket crank with fine adjustment structure according to claim 1, characterized in that, The convex piece (8) and the mounting sleeve (2) are integrally formed by casting, and the protruding block (10) and the mounting piece (3) are integrally formed by casting.

6. The sprocket crank with fine adjustment structure according to claim 2, characterized in that, One end of the rear crank (5) away from the front crank (4) is fixedly connected with the pedal mounting piece (6).

7. The sprocketed bicycle crank with micro-adjustment structure according to claim 1, characterized in that, The chain wheel (1) is provided with a plurality of through holes (7).

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