Quick-release crank assembly

Abstract

The quick-release crank assembly is provided with a crank, assembly holes are formed in the crank and include the upper assembly hole and the lower assembly hole, the upper assembly hole is located in the top of the crank, and in order to protect tooth grains on the inner wall of the crank assembly, a quick-release sleeve can be assembled in the upper assembly hole in the crank assembly. In this way, when an operator operates the crank assembly, the thread cannot be damaged by using an assembling tool, and the requirement for assembling the crank assembly and other accessories of the bicycle can be met only by using the tool to operate the locking screw.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crank assembly, in particular to a quick-release crank assembly. BACKGROUND

[0002] The bicycle needs to use the crank assembly when using, the crank assembly needs to further high -efficient quick disassembly and assembly as important bicycle's assembly, the quick -release crank assembly can make the disassembly and assembly of the crank assembly more efficient, satisfy the need of high -efficient disassembly and assembly, but the thread on the inside of the crank assembly is damaged to a certain extent after the crank assembly in the prior art is disassembled and assembled for many times, which affects the stability of the subsequent assembly of the crank assembly.

[0003] Prior art: CN202023213021.1 a bicycle pedal crank mechanism, the utility model belongs to pedal crank technical field, especially relates to a bicycle pedal crank mechanism, including the axle and the crank symmetrically fixedly connected at both ends of the axle, the crank away from the axle one end all rotationally connected with pedal mechanism, the pedal mechanism includes the pedal and the pivot fixedly connected at one end of the pedal, the pivot penetrates and rotationally connected at the end of the crank, a plurality of screw holes are vertically penetrated in the pedal near one end of the crank, and the screw hole is all threaded with the partition mechanism, in the utility model, through the partition of detachable assembly, it can be conveniently disassembled and assembled and height -adjustable, can limit the position of the foot of the person riding on the pedal, prevent the foot from being inclined inwards, greatly reduce the collision probability of the medial malleolus joint and the crank, and the arc plate of disc shape can further protect the foot.

[0004] Although the crank in the prior art can make the safety of riding higher, the structure is simple, the design is ingenious, and the utility model is easy to popularize, but the crank cannot be protected by internal embossing, and cannot be efficiently and quickly disassembled and assembled, and the crank is not convenient to use. Utility model content

[0005] In order to overcome the defects of the prior art, the utility model provides a quick-release crank assembly.

[0006] The utility model adopts the following technical scheme: a quick-release crank assembly is provided with a crank, an assembly hole is arranged on the crank, the assembly hole is divided into an upper assembly hole and a lower assembly hole, the upper assembly hole is located at the top of the crank, the lower assembly hole is located at the bottom of the crank, an inner hole wall is arranged in the upper assembly hole, an internal thread is arranged on the inner hole wall, a quick-release sleeve is arranged in the upper assembly hole, and assembly lines are arranged on the inner wall of the quick-release sleeve.

[0007] The quick dismounting sleeve and the upper assembly hole are assembled by threads.

[0008] The assembly thread on the inner wall of the quick dismounting sleeve is a quincunx thread.

[0009] The upper assembly hole is divided into a front assembly hole and a rear assembly hole.

[0010] The through hole on the quick dismounting sleeve is communicated with the rear assembly hole and the front assembly hole, and a locking screw is arranged in the through hole.

[0011] The locking screw passes through the through hole and the rear assembly hole, and the locking screw and the rear assembly hole are further assembled by threads.

[0012] Compared with the prior art, when the crank assembly needs to be quickly assembled, the locking screw and other bicycle accessories can be directly assembled by using the assembly tool, and the quick dismounting sleeve can be assembled in the upper assembly hole of the crank assembly to protect the thread on the inner wall of the crank assembly, so that the operator can operate without damaging the thread by using the assembly tool, and only needs to operate the locking screw by using the tool to achieve the assembly of the crank assembly and other bicycle accessories. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the utility model;

[0014] Figure 2 is a structural schematic view of the utility model;

[0015] Figure 3 is a structural schematic view of the utility model;

[0016] In the drawing: 1 is a crank, 2 is an upper assembly hole, 3 is a lower assembly hole, 4 is a quick dismounting sleeve, 5 is an assembly thread, 6 is a locking screw, 21 is a front assembly hole, and 22 is a rear assembly hole. DETAILED DESCRIPTION

[0017] In the following, the utility model is further described in combination with the drawings and the specific implementation mode, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0018] The utility model provides a kind of quick-release crank assembly, is provided with crank 1, assembly hole is provided on the crank 1, the assembly hole is divided into upper assembly hole 2 and lower assembly hole 3, the upper assembly hole 2 is located at the top of crank 1, the lower assembly hole 3 is located at the bottom of crank, inner hole wall is provided in the upper assembly hole 2, inner thread is provided on the inner hole wall, quick-release sleeve 4 is provided in the upper assembly hole 2, assembly thread 5 is provided on the inner wall of quick-release sleeve 4.

[0019] When the crank assembly needs to be quickly released, the quick-release sleeve 4 can be used for preliminary assembly, the quick-release sleeve 4 and the upper assembly hole 2 are assembled by threads, the quick-release sleeve 4 and the upper assembly hole 2 are assembled by reverse thread, the quick-release sleeve 4 can protect the thread in the upper assembly hole, so that the crank assembly can be assembled multiple times without wearing the thread, the assembly thread 5 on the inner wall of the quick-release sleeve 4 adopts a key pattern, and the quick-release sleeve 4 and the upper assembly hole 2 are provided with a through hole.

[0020] To further assemble the crank assembly and the bicycle assembly, a locking screw 6 can be provided on the crank assembly, the upper assembly hole 2 is divided into a front assembly hole 21 and a rear assembly hole 22, the quick-release sleeve 4 and the front assembly hole 21 are further assembled by reverse thread, the rear assembly hole 22, the front assembly hole 21, and the through hole on the quick-release sleeve 4 are mutually through, and the locking screw 6 is arranged in the through hole, the crank assembly and the bicycle assembly are further assembled by the locking screw 6, and then a general disassembly tool can be used for disassembly, which makes the operator more convenient to disassemble.

[0021] The locking screw 6 passes through the through hole and the rear assembly hole 22, the locking screw 6 and the rear assembly hole 22 are further assembled by threads, the locking screw 6 can make the assembly of the crank assembly more convenient, and the thread will not be worn during further assembly of the locking screw 6, and the quick-release sleeve 4 can well protect the thread of the crank assembly, so that the crank assembly can be quickly disassembled by a general tool in the future, and the disassembly efficiency is further improved.

[0022] The above embodiments are only preferred embodiments of the utility model, and cannot be used to limit the scope of protection of the utility model, and any non-substantial changes and replacements made by those skilled in the art on the basis of the utility model belong to the scope of protection claimed by the utility model.

Claims

1. A quick-release crank assembly, comprising a crank, wherein the crank has mounting holes, the mounting holes being divided into an upper mounting hole and a lower mounting hole, the upper mounting hole being located at the top of the crank, the lower mounting hole being located at the bottom of the crank, an inner wall being formed within the upper mounting hole, and an internal thread being formed on the inner wall, characterized in that: The upper assembly hole is internally provided with a quick dismounting sleeve, and an assembly thread is arranged on the inner wall of the quick dismounting sleeve.

2. A quick release crank assembly according to claim 1, wherein: The quick dismounting sleeve and the upper assembly hole are assembled by relying on threads, and the quick dismounting sleeve and the upper assembly hole are assembled by relying on reverse tooth threads.

3. A quick release crank assembly according to claim 1, wherein: The assembly thread on the inner wall of the quick dismounting sleeve adopts a quincunx thread, and a through hole is arranged between the quick dismounting sleeve and the upper assembly hole.

4. A quick release crank assembly according to claim 3, wherein: The upper assembly hole is divided into a front assembly hole and a rear assembly hole, and the quick dismounting sleeve and the front assembly hole are assembled by reverse tooth threads.

5. A quick release crank assembly according to claim 4, wherein: The through hole on the rear assembly hole, the front assembly hole and the quick dismounting sleeve is mutually penetrated, and a locking screw is arranged in the through hole.

6. A quick release crank assembly according to claim 5, wherein: The locking screw passes through the through hole and the rear assembly hole, and the locking screw and the rear assembly hole are further assembled by relying on threads.

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