CN212500860U

CN212500860U - Three-stage forming speed-changing chain wheel for single sheet material

Info

Publication number: CN212500860U
Application number: CN202020844399.2U
Authority: CN
Inventors: 何光荣; 许开明
Original assignee: Yangzhou Chuangmeng Bicycle Fitting Co ltd
Current assignee: Yangzhou Chuangmeng Bicycle Fitting Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-02-09
Anticipated expiration: 2030-05-19

Abstract

The utility model provides a three-level shaping variable speed sprocket of monolithic material. Relates to a bicycle part, in particular to an improvement of a front speed changing chain wheel of a bicycle. The distance between the chain wheels can not be changed, and the chain wheels have small abrasion. The chain wheel device comprises three gears which are overlapped with each other, the three gears are fixed on the chain wheel cover after being overlapped, and a buffer mechanism is arranged between every two adjacent gears; three gears slide in hollow base through the piston, utilize the flow absorption deviational force of fluid, keep the interval between the adjacent gear invariable to ensure that the chain can accurately fall on different gears when using the speed change of finger-dial derailleur, promoted the smooth degree of variable speed process and reduced the degree of wear of chain and gear, the life of extension whole sprocket.

Description

Three-stage forming speed-changing chain wheel for single sheet material

Technical Field

The utility model relates to a bicycle spare part especially relates to the improvement to bicycle front speed sprocket.

Background

The mountain bike is one kind of bicycle, and its obvious difference with ordinary bicycle is that front sprocket group and rear sprocket group adopt multistage variable speed sprocket, thereby alleviate the physical demands of the in-process of riding through pointing to dial derailleur with the chain card on the not unidimensional sprocket of front and back sprocket group according to different road conditions. Generally, a front chain wheel set is formed by overlapping three chain wheels and is connected with the three chain wheels through rivets, and a rear chain wheel set is formed by overlapping 7-10 chain wheels, so that at least 21 speed adjustments can be realized. The front chain wheel is connected by rivets, the rivets are found to be easy to bend after long service life, so that the gap between adjacent chain wheels in the front chain wheel set is changed, the chain is easy to slip when the finger-dial speed changer is used for speed change, or the chain wheel set is easy to clamp when the speed is changed, and the abrasion of the chain wheel set and the chain is accelerated.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a three-level forming variable speed chain wheel with the small single-piece material, which can not change the distance between chain wheels and has small chain wheel abrasion.

The utility model discloses a following technical scheme realizes: the single-piece three-stage forming variable speed chain wheel comprises three gears which are overlapped with each other, the three gears are fixed on the chain wheel cover after being overlapped, and a buffer mechanism is arranged between every two adjacent gears;

buffer gear includes the base, one of them slice is located to the base on the terminal surface of gear, the base cavity, the buffer post is established to the base endotheca, the buffer post is arranged in be equipped with the piston on the terminal surface in the base, be full of hydraulic oil in the base, the piston is in slide in the base, buffer post and adjacent another piece gear connection.

At least one pair of buffer mechanisms is distributed on the gear, and the buffer mechanisms are uniformly distributed on the end face of the gear.

The sprocket cover is provided with a positioning column, the center of the sprocket is provided with a through hole matched with the positioning column, and the gear penetrates through the through hole and is arranged on the positioning column.

The buffer column is sleeved with a spring, one end of the spring is abutted to the end face of the gear, and the other end of the spring is abutted to the base.

Compared with the prior art, the utility model discloses three gears slide in hollow base through the piston, utilize the mobile absorption partial force of fluid, keep the interval between the adjacent gear invariable to ensure that the chain can accurately fall on the gear of difference when using to dial the derailleur variable speed, promoted speed change process's smooth degree and reduced the degree of wear of chain and gear, prolong the life of whole sprocket.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

in the figure: 1. a gear; 2. a buffer mechanism; 21. a base; 22. a buffer column; 23. a piston; 24. a spring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1-2, the single-piece three-stage forming speed-changing chain wheel comprises three gears 1 which are overlapped with each other, the three gears 1 are fixed on the chain wheel cover after being overlapped, and a buffer mechanism 2 is arranged between the adjacent gears 1;

buffer gear 2 includes base 21, one of them slice is located to base 21 on the terminal surface of gear 1, base 21 cavity, buffer column 22 is established to the cover in the base 21, buffer column 22 is arranged in be equipped with piston 23 on the terminal surface in the base 21, be full of hydraulic oil in the base 21, piston 23 is in slide in the base 21, buffer column 22 and adjacent another piece gear 1 is connected. Absorbing the deviation force through buffer gear 2 when single-chip gear 1 because the flexible partial deviation that causes of rivet bending, specifically sliding in hollow base 21 through piston 23, utilize the flow of fluid to absorb the deviation force, keep the interval between the adjacent gear 1 invariable, thereby ensure that the chain can accurately fall on different gear 1 when using the speed change of finger-dial derailleur, promoted the smooth degree of variable speed process and reduced the degree of wear of chain and gear 1, prolong the life of whole sprocket.

At least one pair of buffer mechanisms 2 is distributed on the gear 1, and the buffer mechanisms 2 are uniformly distributed on the end surface of the gear 1. Three gear 1 passes through the punching press technology snap-on together, be equipped with the reference column on the sprocket cover, the center of sprocket is equipped with the through-hole with the reference column adaptation, gear 1 passes through the through-hole and locates on the reference column. The buffer column 22 is sleeved with a spring 24, one end of the spring 24 abuts against the end face of the gear 1, and the other end of the spring 24 abuts against the base 21. Absorbing the deviation force through buffer gear 2 when single-chip gear 1 because the flexible partial deviation that causes of rivet bending, specifically sliding in hollow base 21 through piston 23, utilize the flow of fluid to absorb the deviation force, keep the interval between the adjacent gear 1 invariable, thereby ensure that the chain can accurately fall on different gear 1 when using the speed change of finger-dial derailleur, promoted the smooth degree of variable speed process and reduced the degree of wear of chain and gear 1, prolong the life of whole sprocket. And the spring 24 is arranged on the buffer column 22, so that when in use, part of the buffer column can be absorbed by the spring 24 and is matched with the buffer mechanism 2, and the effect is better.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. Three grade shaping speed change sprocket of monolithic material, including three gears of coincide each other, three the gear coincide after-fixing sprocket covers on its characterized in that: a buffer mechanism is arranged between the adjacent gears;

2. The one-piece three stage molded speed change sprocket as set forth in claim 1, wherein: at least one pair of buffer mechanisms is distributed on the gear, and the buffer mechanisms are uniformly distributed on the end face of the gear.

3. The one-piece three stage molded speed change sprocket as set forth in claim 1, wherein: the sprocket cover is provided with a positioning column, the center of the sprocket is provided with a through hole matched with the positioning column, and the gear penetrates through the through hole and is arranged on the positioning column.

4. The one-piece three stage molded speed change sprocket as set forth in claim 1, wherein: the buffer column is sleeved with a spring, one end of the spring is abutted to the end face of the gear, and the other end of the spring is abutted to the base.