Combined chain wheel of bicycle

Abstract

The utility model provides a combined chain wheel of a bicycle, which belongs to the technical field of bicycles, and comprises a device main body, specifically, the device main body comprises a wheel disc main body and a connecting circular ring, and the connecting circular ring is fixedly arranged on the outer wall of the wheel disc main body; the butt joint mechanism is arranged on the device body and specifically comprises four butt joint grooves and four butt joint strips, the four butt joint grooves are formed in the side wall of the wheel disc body in a circumferential array mode, and the four butt joint strips are slidably arranged on the inner walls of the four butt joint grooves in a circumferential array mode; the chain wheel body is arranged on the butt joint mechanism; the connecting mechanism is arranged on the chain wheel body and the device main body; and the fixing mechanism is arranged on the connecting mechanism. The device solves the problems that the specification and size of the chain wheel are not perfectly optimized, the specification and size of the chain wheel cannot be changed at will, and the overall limitation of the device is large.

Description

Technical Field

[0001] The utility model belongs to the technical field of bicycles, and in particular relates to a bicycle combined sprocket. Background Art

[0002] The sprocket on the bicycle is a consumable part. During the use of the bicycle, the sprocket that cannot be used due to wear often needs to be replaced. At present, the sprocket on the bicycle is connected to the crank by riveting, which is difficult to assemble and disassemble, which brings certain difficulties to replacing the sprocket. Moreover, the sprocket cannot be replaced many times, so sometimes the sprocket and crank assembly need to be replaced, which is very wasteful.

[0003] Application number "CN98226861.0" records "a bicycle middle shaft sprocket device with a flywheel, consisting of a sprocket and a toothless flywheel, characterized in that a toothless flywheel is embedded in the center of the sprocket, the sprocket is connected to the outer circle of the flywheel, and chain covers are connected on both sides of the sprocket; the chain cover has a groove slightly larger than the width of the chain at the chain teeth, and a dust plate and a protective cover are installed on the flywheel on the side of the chain cover facing the crank, and a plug is provided at the end of the middle shaft hole of the crank."

[0004] The above patent is based on a bicycle middle shaft sprocket device with a flywheel, which solves the work loss caused by the sprocket not rotating when the existing bicycle is gliding, and allows the middle shaft sprocket to rotate synchronously with the rear wheel flywheel.

[0005] The above patent reduces work loss, but the device is not fully optimized with respect to the size of the sprocket. The device cannot change the size of the sprocket at will, resulting in greater overall limitations for the device. Utility Model Content

[0006] The utility model aims to provide a bicycle combined sprocket, aiming to solve the problem that the prior art has insufficient optimization in terms of the size of the sprocket, the device cannot change the size of the sprocket at will, and the overall limitation of the device is large.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A bicycle combined sprocket, comprising:

[0009] Device body;

[0010] A docking mechanism, which is arranged on the device body;

[0011] A sprocket body, which is arranged on the docking mechanism;

[0012] A connecting mechanism, which is provided on the sprocket body and the device body; and

[0013] The fixing mechanism is arranged on the connecting mechanism.

[0014] As a preferred solution of the utility model, the device body includes a roulette body and a connecting ring, and the connecting ring is fixedly arranged on the outer wall of the roulette body.

[0015] As a preferred solution of the utility model, the docking mechanism includes a docking groove and a docking strip, wherein four docking grooves are provided, and the four docking grooves are arranged in a circular array on the side wall of the wheel body, and four docking strips are provided, and the four docking strips are arranged in a circular array and are slidably arranged on the inner walls of the four docking grooves respectively.

[0016] As a preferred solution of the utility model, the connecting mechanism includes a first through hole and a second through hole, wherein four first through holes are provided, and the four first through holes are opened in a circular array on the side wall of the sprocket body and pass through the sprocket body, and four second through holes are provided, and the four second through holes are opened in a circular array on the side wall of the connecting ring and pass through the connecting ring, and the positions of the four first through holes and the second through holes are aligned with each other.

[0017] As a preferred solution of the utility model, the fixing mechanism includes a fastening bolt and a threaded sleeve, wherein four fastening bolts are provided, and the four fastening bolts are respectively slidably arranged on the inner walls of the four first through holes and the second through holes, and wherein four threaded sleeves are provided, and the four threaded sleeves are respectively threadedly arranged on the circumferential surfaces of the four fastening bolts.

[0018] As a preferred solution of the utility model, the sprocket body is fixedly arranged on the outer walls of the four docking strips.

[0019] As a preferred solution of the utility model, the four docking grooves and the docking strips are slidably matched with each other.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. By opening four docking grooves in a circular array on the side wall of the wheel body, four docking strips are slidably arranged in a circular array on the inner walls of the four docking grooves, respectively, to assist the overall work of the device, thereby reducing the overall operation difficulty of the device.

[0022] 2. By opening four first through holes in a circular array on the side wall of the sprocket body and penetrating the sprocket body, and opening four second through holes in a circular array on the side wall of the connecting ring and penetrating the connecting ring, the positions of the four first through holes and the second through holes are aligned with each other, and four fastening bolts are slidably arranged on the inner walls of the four first through holes and the second through holes respectively, and four threaded sleeves are threadedly sleeved on the circumferential surfaces of the four fastening bolts respectively, it is convenient to replace sprockets of different specifications and sizes, thereby reducing the overall limitations of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a first-perspective stereoscopic diagram of a bicycle combined sprocket of the utility model;

[0025] Figure 2 This is a first-perspective stereoscopic cross-sectional view of a bicycle combined sprocket of the utility model;

[0026] Figure 3 This is a first-person perspective exploded view of a bicycle combined sprocket of the utility model;

[0027] Figure 4 This is a second perspective stereogram of a bicycle combined sprocket of the utility model;

[0028] Figure 5 This is a stereoscopic exploded view of a bicycle combined sprocket from a second viewing angle of the utility model.

[0029] In the figure: 1. wheel disc body; 2. connecting ring; 3. docking groove; 4. docking strip; 5. sprocket body; 6. first through hole; 7. second through hole; 8. fastening bolt; 9. threaded sleeve. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Example

[0032] See also Figure 1-5 , the utility model provides the following technical solutions:

[0033] A bicycle combined sprocket, which is composed of a device body, a docking mechanism, a sprocket body 5, a connecting mechanism and a fixing mechanism, which are specifically described as follows:

[0034] See also Figure 1 , the device body, specifically, the device body includes a roulette body 1 and a connecting ring 2, the connecting ring 2 is fixedly arranged on the outer wall of the roulette body 1;

[0035] See also Figure 2The docking mechanism is arranged on the device body. Specifically, the docking mechanism includes a docking groove 3 and a docking strip 4. There are four docking grooves 3, which are arranged in a circular array on the side wall of the wheel body 1. There are four docking strips 4, which are arranged in a circular array and are slidably arranged on the inner walls of the four docking grooves 3 respectively.

[0036] See also Figure 3 , the sprocket body 5 is arranged on the docking mechanism;

[0037] See also Figure 4 , a connecting mechanism is provided on the sprocket body 5 and the device body, specifically, the connecting mechanism includes a first through hole 6 and a second through hole 7, four first through holes 6 are provided, the four first through holes 6 are arranged in a circumferential array on the side wall of the sprocket body 5 and penetrate the sprocket body 5, four second through holes 7 are provided, the four second through holes 7 are arranged in a circumferential array on the side wall of the connecting ring 2 and penetrate the connecting ring 2, and the positions of the four first through holes 6 and the second through holes 7 are aligned with each other; and

[0038] See also Figure 5 The fixing mechanism is arranged on the connecting mechanism. Specifically, the fixing mechanism includes a fastening bolt 8 and a threaded sleeve 9. There are four fastening bolts 8, which are respectively slidably arranged on the inner walls of the four first through holes 6 and the second through holes 7. There are four threaded sleeves 9, which are respectively threadedly sleeved on the circumferential surfaces of the four fastening bolts 8.

[0039] See also Figure 5 The sprocket body 5 is fixedly arranged on the outer walls of the four docking strips 4.

[0040] See also Figure 3 The four docking grooves 3 and the docking strips 4 are slidably matched with each other.

[0041] In this embodiment: by opening four docking grooves 3 in a circular array on the side wall of the roulette body 1, four docking strips 4 are slidably arranged in a circular array on the inner walls of the four docking grooves 3, the overall operation of the device is assisted, thereby reducing the difficulty of operating the device as a whole.

[0042] By opening four first through holes 6 in a circular array on the side wall of the sprocket body 5 and penetrating the sprocket body 5, and opening four second through holes 7 in a circular array on the side wall of the connecting ring 2 and penetrating the connecting ring 2, the positions of the four first through holes 6 and the second through holes 7 are aligned with each other, four fastening bolts 8 are respectively slidably arranged on the inner walls of the four first through holes 6 and the second through holes 7, and four threaded sleeves 9 are respectively threadedly sleeved on the circumferential surfaces of the four fastening bolts 8, it is convenient to replace sprockets of different specifications and sizes, thereby reducing the overall limitations of the device.

[0043] The working principle and use process of the utility model are as follows: when a new sprocket body 5 needs to be replaced, the sprocket body 5 can be removed by unscrewing the threaded sleeve 9 on the circumferential surface of the fastening bolt 8 and pulling the fastening bolt 8 out from the inner wall of the first through hole 6 and the second through hole 7. Then, the docking strip 4 on a new sprocket body 5 of a certain size is aligned with the connecting ring 2 on the side wall of the wheel body 1. Then, the fastening bolt 8 is passed through the first through hole 6 and the second through hole 7 according to the above operation. Finally, the threaded sleeve 9 is threadedly sleeved on the circumferential surface of the fastening bolt 8 to achieve fixation. In this way, sprocket bodies 5 of different sizes and specifications can be effectively replaced, reducing the overall limitations of the device.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bicycle combined sprocket, characterized in that: include: Device body; A docking mechanism, which is arranged on the device body; A sprocket body (5) is arranged on the docking mechanism; A connecting mechanism, which is arranged on the sprocket body (5) and the device body; as well as A fixing mechanism, which is arranged on the connecting mechanism; The device body comprises a wheel disc body (1) and a connecting ring (2), wherein the connecting ring (2) is fixedly arranged on the outer wall of the wheel disc body (1); The docking mechanism comprises a docking groove (3) and a docking strip (4), wherein the docking grooves (3) are provided with four, and the four docking grooves (3) are arranged in a circumferential array on the side wall of the wheel disc body (1), and the docking strip (4) is provided with four, and the four docking strips (4) are arranged in a circumferential array and are respectively slidably arranged on the inner walls of the four docking grooves (3); The connecting mechanism comprises a first through hole (6) and a second through hole (7), wherein four first through holes (6) are provided, and the four first through holes (6) are arranged in a circumferential array on the side wall of the sprocket body (5) and penetrate the sprocket body (5), and four second through holes (7) are provided, and the four second through holes (7) are arranged in a circumferential array on the side wall of the connecting ring (2) and penetrate the connecting ring (2), and the positions of the four first through holes (6) and the four second through holes (7) are aligned with each other.

2. A bicycle combined sprocket according to claim 1, characterized in that: The fixing mechanism comprises a fastening bolt (8) and a threaded sleeve (9), wherein four fastening bolts (8) are provided, and the four fastening bolts (8) are respectively slidably arranged on the inner walls of the four first through holes (6) and the second through holes (7), and four threaded sleeves (9) are respectively threadedly sleeved on the circumferential surfaces of the four fastening bolts (8).

3. A bicycle combined sprocket according to claim 2, characterized in that: The sprocket body (5) is fixedly arranged on the outer walls of the four butt joint strips (4).

4. A bicycle combined sprocket according to claim 3, characterized in that: The four docking grooves (3) and the docking strips (4) are slidably matched with each other.

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