Integrated chain blocking tooth piece assembly

Abstract

The utility model provides an integrated chain blocking tooth piece assembly which comprises two cranks, a middle shaft, a small tooth piece and a large tooth piece, a plurality of fixing columns and a plurality of crank claws are arranged on the end face, facing the other crank, of one crank in the circumferential direction, the fixing columns are located on the inner sides of the crank claws, the length of each fixing column is larger than that of each crank claw, and the large tooth piece is located on the middle shaft. Each crank claw is provided with a first installation hole, each fixing column is provided with a second installation hole, the small tooth pieces are fixed to the multiple fixing columns through the multiple fasteners, the large tooth pieces are fixed to the multiple crank claws through the multiple fasteners, and the end face, facing one crank, of each large tooth piece is provided with a chain blocking rod. The chain stopping rod is used for stopping the chain from being clamped between the large tooth piece and the crank. Therefore, the chain can be prevented from being clamped between the adjacent tooth pieces or between the tooth pieces and the crank after chain falling, maintenance operation after chain falling of the bicycle is facilitated, and the practical effect of the chain falling prevention device is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle accessory technical field, concretely relates to an integrated chain blocking tooth piece assembly. BACKGROUND

[0002] Bicycle is also called as footboard or bicycle, and is a kind of green environmental protection traffic tool, and rider drives wheel rotation to move by treading pedal as power.Bicycle in prior art has gap between each tooth piece and between tooth piece and crank, so that the condition of chain falling occurs in the process of bicycle riding or speed changing, so that chain is blocked in adjacent tooth pieces or tooth piece and crank, and then normal riding of bicycle is hindered.

[0003] And generally, bicycle needs to be parked to manually chain when chain falling, so that the condition of chain falling can be excluded, and then riding can be continued, and the blocking situation caused by chain falling is very troublesome and inconvenient when manually chaining, so that prior art has limitation. SUMMARY

[0004] The utility model is carried out to solve the above-mentioned problem, and the purpose is to provide an integrated chain blocking tooth piece assembly.

[0005] The utility model provides an integrated chain blocking tooth piece assembly, including two cranks, middle shaft, small tooth piece and big tooth piece, one end of two cranks is equipped with fixed hole, makes middle shaft pass through fixed hole and is fixed between two cranks, both ends of middle shaft are equipped with middle shaft bowl, so as to protect the connecting place of middle shaft and two cranks, and the middle shaft is fastened between two cranks, the end face of one crank towards the other crank is equipped with a plurality of fixed columns and a plurality of crank claws along the circumference, a plurality of fixed columns are located in the inner side of a plurality of crank claws, and the length of each fixed column is greater than the length of crank claw, each crank claw is equipped with first installation hole, each fixed column is equipped with second installation hole, small tooth piece is fixed on a plurality of fixed columns through a plurality of fasteners, big tooth piece is fixed on a plurality of crank claws through a plurality of fasteners, the end face of big tooth piece towards one crank is equipped with chain blocking rod, and chain blocking rod is used to prevent chain from being blocked between big tooth piece and crank.

[0006] In the integrated chain blocking tooth piece assembly provided by the utility model, the inner wall of the big tooth piece can be attached to the outer wall of the plurality of fixed columns.

[0007] In the integrated chain blocking tooth piece assembly provided by the utility model, the length of the chain blocking rod can be not greater than the distance between the big tooth piece and the crank rod part.

[0008] In the integrated chain blocking tooth piece assembly provided by the utility model, the chain blocking rod can be located on the outer circumferential side of the plurality of crank claws.

[0009] The integrated chain stopper tooth plate assembly provided by the present invention may also have the following feature: the chain stopper rod is integrally formed on the end surface of the large tooth plate.

[0010] The integrated chain stopper tooth plate assembly provided by the present invention may also have the following feature: the distance between the large tooth plate and the small tooth plate is smaller than the width of the chain.

[0011] Functions and effects of utility models

[0012] The integrated chain-stop sprocket assembly of the present invention features a chain-stop rod on the end surface of the large sprocket facing the crank, preventing the chain from getting stuck between the large sprocket and the crank. Furthermore, because the distance between the large and small sprockets is less than the width of the rack, the chain is prevented from getting stuck between adjacent sprockets. This prevents the chain from getting stuck between adjacent sprockets or between a sprocket and the crank after a chain drop, facilitating maintenance after a bicycle chain drop, ensuring the practical benefits of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 yes Figure 1 A in the enlarged view.

[0015] Description of reference numerals:

[0016] 1. Crank; 11. Fixed column; 12. Crank claw; 2. Bottom bracket; 21. Bottom bracket bowl; 3. Small sprocket; 4. Large sprocket; 5. Chain rod. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is described in detail in the following embodiments with reference to the accompanying drawings.

[0018] Example

[0019] Figure 1 It is a structural diagram of the utility model. Figure 2 yes Figure 1 A in the enlarged view.

[0020] like Figure 1 and Figure 2 As shown, this embodiment provides an integrated chain sprocket assembly, including: two cranks 1, a middle shaft 2, a small sprocket 3, and a large sprocket 4.

[0021] like Figure 1As shown, one end of each crank 1 is provided with a fixing hole, so that the central shaft 2 is fixedly arranged between the two cranks 1 through the fixing hole. In addition, a plurality of fixing posts 11 and a plurality of crank claws 12 are provided along the circumference of the end surface of one crank 1 facing the other crank 1. The plurality of fixing posts 11 are located inside the plurality of crank claws 12, and the length of each fixing post 11 is greater than the length of the crank claw 12. Each crank claw 12 is provided with a first mounting hole, and each fixing post 11 is provided with a second mounting hole.

[0022] In this embodiment, the fastener has a rod-shaped locking portion, an outer wall of the locking portion is provided with an external thread, and the inner walls of the first mounting hole and the second mounting hole are both provided with an internal thread that meshes with the external thread.

[0023] like Figure 1 As shown, a center shaft bowl 21 is provided at both ends of the center shaft 2 to protect the connection between the center shaft 2 and the two cranks 1 and to fasten the center shaft 2 between the two cranks 1 .

[0024] like Figure 1 As shown, the small tooth piece 3 is fixed on a plurality of fixing posts 11 by a plurality of fasteners.

[0025] like Figure 1 and Figure 2 As shown, the large tooth piece 4 is fixed to a plurality of crank claws 12 by a plurality of fasteners. A chain blocking rod 5 is provided on the end surface of the large tooth piece 4 facing a crank 1 , and the chain blocking rod 5 is used to prevent the chain from getting stuck between the large tooth piece 4 and the crank 1 .

[0026] In this embodiment, the distance between the large sprocket 4 and the small sprocket 3 is smaller than the width of the chain, thereby preventing the chain from getting stuck between the large sprocket 4 and the small sprocket 3 when the chain falls.

[0027] In this embodiment, the inner wall of the large tooth piece 4 is in contact with the outer walls of the plurality of fixing posts 11 , thereby ensuring the stability of the large tooth piece 4 when it is arranged on the crank 1 .

[0028] In this embodiment, the length of the chain blocking rod 5 is no greater than the distance between the large sprocket 4 and the crank 1, and the chain blocking rod 5 is located on the outer periphery of the plurality of crank claws 12. This prevents the chain from getting stuck between the large sprocket 4 and the crank 1 when the chain falls.

[0029] In this embodiment, the chain stopper rod 5 is integrally formed on the end surface of the large sprocket 4. This improves the tension between the chain stopper rod 5 and the large sprocket 4. Furthermore, the number of steps required to install the chain stopper rod 5 on the large sprocket 4 is reduced, and the risk of the chain stopper rod 5 falling off the large sprocket 4 is reduced, thereby ensuring the stability of the present invention during use.

[0030] Functions and Effects of the Embodiments

[0031] According to the integral chain blocking tooth piece assembly, the chain blocking rod is arranged on the end face of the large tooth piece towards the crank, so that the chain can be prevented from being stuck between the large tooth piece and the crank. Moreover, the distance between the large tooth piece and the small tooth piece is less than the width of the rack, so that the chain can be prevented from being stuck between adjacent tooth pieces. Therefore, the utility model can avoid the chain from being stuck between adjacent tooth pieces or tooth pieces and the crank after the chain is dropped, thereby facilitating the maintenance operation after the chain is dropped of the bicycle, and ensuring the practical effect of the utility model.

[0032] The above embodiment is a preferred case of the utility model, and does not limit the protection scope of the utility model.

Claims

1. An integrated chain blocking and tooth assembly, comprising two cranks, a middle shaft, a small tooth and a large tooth, one end of each of the two cranks is provided with a fixing hole, the middle shaft is fixedly arranged between the two cranks through the fixing hole, and both ends of the middle shaft are provided with middle shaft bowls to protect the connection between the middle shaft and the two cranks and fasten the middle shaft between the two cranks, characterized in that: the end face of one of the two cranks towards the other one is provided with a plurality of fixing columns and a plurality of crank claws in the circumferential direction, the plurality of fixing columns are located inside the plurality of crank claws, and the length of each fixing column is greater than the length of the crank claw, each crank claw is provided with a first mounting hole, and each fixing column is provided with a second mounting hole, the small tooth is fixed on the plurality of fixing columns through a plurality of fasteners, and the large tooth is fixed on the plurality of crank claws through a plurality of fasteners, the end face of the large tooth towards one of the two cranks is provided with a chain blocking rod for blocking the chain from being stuck between the large tooth and the crank.

2. The integrated chain blocking and tooth assembly according to claim 1, characterized in that: the inner wall of the large tooth is attached to the outer wall of the plurality of fixing columns.

3. The integrated chain blocking and tooth assembly according to claim 1, characterized in that: the length of the chain blocking rod is not greater than the distance between the large tooth and the crank rod part.

4. The integrated chain blocking and tooth assembly according to claim 1, characterized in that: the chain blocking rod is located on the outer circumferential side of the plurality of crank claws.

5. The integrated chain blocking and tooth assembly according to claim 1, characterized in that: the chain blocking rod is integrally formed on the end face of the large tooth. wherein 6. The integrated chain blocking and tooth assembly according to claim 1, characterized in that: the distance between the large tooth and the small tooth is less than the width of the chain. ​ wherein ​ ​ wherein ​ ​ wherein, ​ ​ wherein ​

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