CN219619314U - Bicycle sprocket crank convenient to change - Google Patents

Abstract

The utility model discloses a bicycle sprocket crank convenient to replace, and relates to the technical field of bicycles. The chain wheel comprises a crank main body, wherein the lower end of the crank main body is fixedly connected to a connecting sleeve, the connecting sleeve is rectangular, a step groove is formed in the connecting sleeve, the connecting sleeve is sleeved on a mounting seat, the mounting seat is fixedly connected to the center position of one side of the chain wheel main body, the mounting seat is rectangular, and locking teeth are elastically connected to the peripheral side wall of the mounting seat through springs. According to the utility model, the connecting sleeve is arranged at the lower end of the crank main body, the mounting seat is arranged at one side of the chain wheel main body, the connecting sleeve is sleeved on the mounting seat, the locking teeth on the mounting seat are clamped into the step grooves on the connecting sleeve, the bicycle chain wheel crank can be rapidly mounted, the square pipe is inserted into the step grooves, the four locking teeth are extruded into the mounting seat, a spanner is not required, and the bicycle chain wheel crank can be rapidly replaced by personnel conveniently.

Description

Bicycle sprocket crank convenient to change

Technical Field

The utility model belongs to the technical field of bicycles, and particularly relates to a bicycle sprocket crank convenient to replace.

Background

The sprocket cranks of bicycles are an essential and important component in bicycle assemblies, and as bicycles are put into use more and more, the demands of people on the sprocket cranks of bicycles are also increasing. Through retrieving, the patent of application number 202220284587.3 discloses a bicycle sprocket crank convenient to change, including the sprocket main part, the inside centre department of sprocket main part installs the connection axle bed, the one end of connection axle bed is equipped with first mounting panel, the opposite side of first mounting panel is provided with the second mounting panel. This bicycle sprocket crank convenient to change is through being provided with connecting plate, radiating seat, first heat conduction strip, second heat conduction strip and fin.

However, in the practical use process, the applicant found that only a part of the cranks of the bicycle sprocket can be quickly replaced, and when the cranks on the bicycle sprocket are replaced integrally from the sprocket, a wrench and various disassembling tools are needed to disassemble the cranks from the sprocket, which is still inconvenient, and in view of this, we propose a bicycle sprocket crank convenient to replace.

Disclosure of Invention

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a bicycle sprocket crank convenient to replace, which comprises a crank main body, wherein the lower end of the crank main body is fixedly connected to a connecting sleeve, the connecting sleeve is rectangular, a step groove is formed in the connecting sleeve, the connecting sleeve is sleeved on a mounting seat, the mounting seat is fixedly connected to the center position of one side of the sprocket main body, the mounting seat is rectangular, locking teeth are elastically connected to the peripheral side wall of the mounting seat through springs, the locking teeth are clamped in the step groove, and an inclined surface is formed in one side, far away from the sprocket main body, of the front end of the locking teeth.

Preferably, the power driving block is fixedly arranged on the peripheral side wall of the connecting sleeve, and one side of the power driving block is flush with the end face of one side of the connecting sleeve, which is close to the chain wheel main body.

Preferably, a power transmission block is fixedly arranged on one side of the sprocket main body, four power transmission blocks are arranged in an annular array with the center of the sprocket main body, and the four power transmission blocks are respectively matched with the four power driving blocks.

Preferably, the pedal mounting hole has been seted up to the upper end of crank main part, the central point department of sprocket main part has been seted up the installation through-hole, the logical groove has been seted up on the sprocket main part, and the logical groove is annular array with the center of sprocket main part and has seted up three.

Preferably, the four side walls of the mounting seat are provided with limiting sliding grooves, the tail parts of the four locking teeth are provided with limiting sliding blocks, and the limiting sliding blocks slide along the limiting sliding grooves.

Preferably, the spring is located in the limiting chute, one end of the spring is abutted on the inner wall of the limiting chute, and the other end of the spring is abutted on the tail end of the locking tooth.

The utility model has the following beneficial effects:

according to the bicycle sprocket crank convenient to replace, the connecting sleeve is arranged at the lower end of the crank main body, the mounting seat is arranged on one side of the sprocket main body, the connecting sleeve is sleeved on the mounting seat, the locking teeth on the mounting seat are clamped into the step grooves on the connecting sleeve, the connecting sleeve can be quickly installed and fixed on the mounting seat, the bicycle sprocket crank can be quickly installed, the four locking teeth are inserted into the step grooves by utilizing the square tubes, the connecting sleeve and the square tubes can be detached from the mounting seat together, a spanner is not required, a person can conveniently and quickly replace the bicycle sprocket crank, meanwhile, the power transmission block is arranged on the sprocket main body, the power driving block is arranged on the connecting sleeve, the connecting sleeve can be better transmitted to the sprocket main body by matching the power transmission block and the power driving block, abrasion between the connecting sleeve and the mounting seat is reduced, and the service life of the bicycle sprocket crank can be prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a bicycle sprocket crank that facilitates replacement in accordance with the present utility model;

FIG. 2 is a schematic illustration of the structure of a sprocket in a bicycle sprocket crank for easy replacement in accordance with the present utility model;

FIG. 3 is a schematic illustration of a crank body and adapter sleeve in a bicycle sprocket crank for easy replacement in accordance with the present utility model;

FIG. 4 is a schematic illustration of the internal structure of a mounting bracket in a bicycle sprocket crank for easy replacement in accordance with the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. a crank main body; 11. a pedal mounting hole; 2. connecting sleeves; 21. a step groove; 3. a sprocket body; 31. mounting through holes; 32. a through groove; 4. a mounting base; 41. limiting sliding grooves; 5. a power transmission block; 6. locking teeth; 61. an inclined surface; 62. a limit sliding block; 7. a power driving block; 8. and (3) a spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution:

embodiment one: the bicycle sprocket crank convenient to replace comprises a crank main body 1, wherein a pedal mounting hole 11 is formed at the upper end of the crank main body 1, the lower end of the crank main body 1 is fixedly connected to a connecting sleeve 2, the connecting sleeve 2 is rectangular, a step groove 21 is formed in the connecting sleeve 2, the connecting sleeve 2 is sleeved on a mounting seat 4, the mounting seat 4 is fixedly connected to the central position of one side of a sprocket main body 3, a mounting through hole 31 is formed in the central position of the sprocket main body 3, a through groove 32 is formed in the sprocket main body 3, three through grooves 32 are formed in the center of the sprocket main body 3 in an annular array, the mounting seat 4 is rectangular, locking teeth 6 are elastically connected to the peripheral side walls of the mounting seat 4 through springs 8, limit sliding grooves 41 are formed in the four side walls of the mounting seat 4, limit sliding blocks 62 are arranged at the tail parts of the four locking teeth 6 and slide along the limit sliding grooves 41, the spring 8 is positioned in the limit sliding groove 41, one end of the spring 8 is abutted against the inner wall of the limit sliding groove 41, the other end of the spring 8 is abutted against the tail end of the locking tooth 6, the locking tooth 6 is clamped in the step groove 21, an inclined surface 61 is formed on one side of the front end of the locking tooth 6 far away from the sprocket main body 3, when the sprocket crank of the bicycle is damaged and needs to be replaced, a person can insert the square tube which can be tightly attached to the outer side wall of the mounting seat 4 into the step groove 21, as the square tube is gradually inserted into the step groove 21, due to the contact of the inclined surface 61 formed on the locking tooth 6 and the square tube, four locking teeth 6 on the mounting seat 4 can be simultaneously extruded, at the moment, the mounting seat 4 can be retracted into the limit sliding groove 41 and compress the spring 8 after being extruded by the square tube, and when the front end of the square tube is abutted against the bottom of the step groove 21, at this moment, four locking teeth 6 can be completely retracted into the limit sliding groove 41, finally, a person can manually take down the connecting sleeve 2 together with the square tube from the mounting seat 4, quick disassembly of the bicycle sprocket crank is achieved, when a new bicycle sprocket crank is mounted, the connecting sleeve 2 can be sleeved on the mounting seat 4, when the connecting sleeve 2 moves to be in contact with the locking teeth 6, the four locking teeth 6 can be extruded into the limit sliding groove 41 along with the continuous movement of the connecting sleeve 2, at this moment, the spring 8 is in a compressed state, when the locking teeth 6 reach the step groove 21, at this moment, under the elastic force of the spring 8, the locking teeth 6 can be driven to automatically pop up, and the locking teeth 6 are clamped in the step groove 21, so that the connecting sleeve 2 can be stably fixed on the mounting seat 4, quick assembly of the bicycle sprocket crank is achieved, and the process is more convenient and rapid disassembly is achieved without using a wrench.

Embodiment two: the difference between this embodiment and the first embodiment lies in that, wherein, fixedly be provided with power drive piece 7 on the week lateral wall of adapter sleeve 2, and the terminal surface parallel and level of one side that power drive piece 7 and adapter sleeve 2 are close to sprocket main part 3 one side, the fixed power transmission piece 5 that is provided with in one side of sprocket main part 3, and power transmission piece 5 is the annular array with the center of sprocket main part 3 and is provided with four, four power transmission pieces 5 cooperate with four power drive piece 7 respectively, when adapter sleeve 2 cover is established on mount pad 4, four power drive pieces 7 on the adapter sleeve 2 can laminate with four power transmission pieces 5 on sprocket main part 3 respectively this moment, in the crank main part 1 drives the in-process that adapter sleeve 2 rotated, through the cooperation effect of power drive piece 7 and power transmission piece 5, can be with the better transmission of the power of adapter sleeve 2 to sprocket main part 3, can reduce the wearing and tearing between adapter sleeve 2 and the mount pad 4, and then can prolong the life of bicycle sprocket crank.

Working principle: when the bicycle chain crank is damaged and needs to be replaced, a person can insert the square tube which can be tightly attached to the outer side wall of the mounting seat 4 into the step groove 21, and as the square tube is gradually inserted into the step groove 21, the four locking teeth 6 on the mounting seat 4 can be simultaneously extruded due to the contact of the inclined surface 61 formed on the locking teeth 6 and the square tube, the mounting seat 4 can be retracted into the limit sliding groove 41 after being extruded by the square tube and compress the spring 8, when the front end of the square tube is abutted to the bottom of the step groove 21, the four locking teeth 6 can be completely retracted into the limit sliding groove 41, finally, the person can manually take down the connecting sleeve 2 together with the square tube from the mounting seat 4, so that the bicycle chain crank can be quickly disassembled, and when a new bicycle chain crank is mounted, the connecting sleeve 2 can be sleeved on the mounting seat 4, when the connecting sleeve 2 moves to be in contact with the locking teeth 6, along with the continuous movement of the connecting sleeve 2, four locking teeth 6 can be extruded into the limit sliding groove 41, at the moment, the spring 8 is in a compressed state, when the locking teeth 6 reach the step groove 21, at the moment, under the action of the elasticity of the spring 8, the locking teeth 6 can be driven to automatically pop out, the locking teeth 6 are clamped in the step groove 21, the connecting sleeve 2 can be stably fixed on the mounting seat 4, the quick mounting of a bicycle sprocket crank is completed, a spanner is not required to be used for dismounting in the process, the connecting sleeve 2 is more convenient, when the connecting sleeve 2 is sleeved on the mounting seat 4, at the moment, four power driving blocks 7 on the connecting sleeve 2 can be respectively attached with four power transmission blocks 5 on the sprocket main body 3, and in the process of driving the connecting sleeve 2 to rotate by the crank main body 1, through the cooperation of the power driving blocks 7 and the power transmission blocks 5, the force of the connecting sleeve 2 can be better transmitted to the chain wheel main body 3, the abrasion between the connecting sleeve 2 and the mounting seat 4 can be reduced, and the service life of the bicycle chain wheel crank can be prolonged.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, and any modification of the technical solutions described in the foregoing embodiments, and equivalent substitution of some technical features thereof, falls within the scope of the present utility model.

Claims (6)

1. Bicycle sprocket crank convenient to change, including crank main part (1), its characterized in that: the lower extreme fixed connection of crank main part (1) is on adapter sleeve (2), adapter sleeve (2) are the rectangle setting, and step groove (21) has been seted up to the inside of adapter sleeve (2), adapter sleeve (2) cover is established on mount pad (4), the central point department of mount pad (4) fixed connection in sprocket main part (3) one side, mount pad (4) are the rectangle setting, all have locking tooth (6) through spring (8) elastic connection on the week lateral wall of mount pad (4), locking tooth (6) card is in step groove (21), and one side that sprocket main part (3) were kept away from to locking tooth (6) front end has been seted up inclined plane (61).

2. The bicycle sprocket crank convenient to replace according to claim 1, wherein the power driving block (7) is fixedly arranged on the peripheral side wall of the connecting sleeve (2), and one side of the power driving block (7) is flush with the end face of one side of the connecting sleeve (2) close to the sprocket main body (3).

3. The bicycle sprocket crank convenient to replace according to claim 2, wherein a power transmission block (5) is fixedly arranged on one side of the sprocket main body (3), four power transmission blocks (5) are arranged in an annular array with the center of the sprocket main body (3), and the four power transmission blocks (5) are respectively matched with the four power driving blocks (7).

4. The bicycle sprocket crank convenient to replace according to claim 1, wherein the crank main body (1) is provided with a pedal mounting hole (11) at the upper end, the center of the sprocket main body (3) is provided with a mounting through hole (31), the sprocket main body (3) is provided with a through groove (32), and the through groove (32) is provided with three parts in an annular array with the center of the sprocket main body (3).

5. The bicycle sprocket crank convenient to replace according to claim 1, wherein limiting sliding grooves (41) are formed in four side walls of the mounting seat (4), limiting sliding blocks (62) are arranged at tail portions of the four locking teeth (6), and the limiting sliding blocks (62) slide along the limiting sliding grooves (41).

6. The bicycle sprocket crank as one of the claims 5, wherein the spring (8) is located in the limit chute (41), one end of the spring (8) is abutted against the inner wall of the limit chute (41), and the other end of the spring (8) is abutted against the tail end of the locking tooth (6).