CN2118207U

CN2118207U - Chain of bicycle

Info

Publication number: CN2118207U
Application number: CN 92208026
Authority: CN
Inventors: 吴俊德
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-17
Filing date: 1992-04-17
Publication date: 1992-10-07

Abstract

The utility model relates to a chain of a bicycle which is composed of a roller, an internal link and an external link and is characterized in that the internal link is positioned on the central part between the through holes on two ends; the upper and the lower edges of the internal link are respectively outwards and slantwise protruded to form an inclined face in order to enlarge the gap distance of the central outer edge of the internal link on two sides of the roller; the utility model has the effect of being beneficial to speed change.

Description

Chain of bicycle

The utility model relates to a kind of bicycle chain, and the central space distance between particularly a kind of inner chain sheet is beneficial to the bicycle chain of speed change greatly.

The structure of bicycle chain normally articulated two inner chain sheets and two outer chain sheets in the roller both sides in the past, and outer chain sheet connects two adjacent inner chain sheets, so is combined into a chain.When bicycle is wanted speed change, be to utilize chain to be transformed on the sprocket wheel of different-diameter to turn round, to reach the effect of speed change, and chain is transformed into the process of another sprocket wheel from a sprocket wheel, chain must be crooked angle earlier, a certain gap between two inner chain sheets or two outer chain sheets is inserted on the sprocket of wanting the conversion sprocket wheel in advance, just can spurs backward the gap between all chain sheets and all be inserted on the sprocket wheel sprocket of wanting conversion; Therefore in speed-change process; inner chain sheet or outer chain sheet central position root edge are through regular meeting and chain Topland rubbing contact mutually; and in the past the chain sheet of chain because everywhere thickness is the same; therefore speed change constantly regular meeting wanted the chain Topland of conversion sprocket wheel to withstand (or tooth stung in title); and speed change is had some setbacks, or the phenomenon of taking off chain easily.

By above explanation as can be known, how under the normal specifications that does not influence chain, and the spacing between the suitable increasing two inside and outside chain sheets be make speed change smooth and easy, be crucial place really.

Therefore, main purpose of the present utility model provide a kind of speed change fluently, bicycle chain smoothly.

Of the present utility model being characterised in that: inner chain sheet is between the central position between the two ends perforation, thereon, each is outwards tiltedly outstanding for lower edge.And the formation plane of inclination with the clearance distance at the inner chain sheet central authorities outer rim place that enlarges the roller both sides, and has smooth and easy, the fluent effect of speed change.

For realizing above-mentioned technology, means and effect thereof, now enumerate preferred embodiment and cooperate graphic, after being described in detail in, wherein the diagram be respectively:

Fig. 1 is the utility model embodiment's a combination plan view.

Fig. 2 is the front view of the utility model embodiment inner chain sheet.

Fig. 3 is the A-A sectional view of Fig. 2.

As Figure 1-3, mainly form by roller 1 and 2,3 of inside and outside chain sheets, by bearing pin 3 three's pin joint is combined into one, the central position of inner chain sheet 2 between two ends perforation 21, outwards outstanding in inner chain sheet 2 each punching press of upper and lower edge place, form outward-dipping plane of inclination 22, the angle of inclination Q of plane of inclination 22 is about the 10-15 degree.

Present embodiment is because under the normal specifications that does not influence chain, to the outstanding plane of inclination 22 of the outside punching press of the upper and lower edge of inner chain sheet 2 central positions, so relative two inner chain sheets 2 are in the width of the clearance distance C at the central outer rim place about 1mm of clearance D more in the past, the increasing of clearance distance C, add the guide function of plane of inclination 22, gap between the chain sheet can be rapid and fluent put sprocket, to finish gear shifting operation smoothly.

Claims

1, a kind of bicycle chain is made up of roller and inside and outside chain sheet, and the mat bearing pin is combined into one the three, it is characterized in that the central position of inner chain sheet between the two ends perforation, each outwards outstanding plane of inclination that forms at the upper and lower edge of inner chain sheet place.

2, by the described bicycle chain of claim 1, the angle of inclination that it is characterized in that the inner chain sheet plane of inclination is the 10-15 degree.