CN2113379U

CN2113379U - Chain for bicycle

Info

Publication number: CN2113379U
Application number: CN 92202992
Authority: CN
Inventors: 吴俊德
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-02-15
Filing date: 1992-02-15
Publication date: 1992-08-19

Abstract

The utility model relates to the chain of a bicycle. The utility model is characterized in that a chain axle penetrates through outer chain links, rollers, and inner chain links together to form an assembly. An inwardly bulged flange is arranged at the periphery of two punched holes on both ends of each inner chain link. The height of the flange is less than half of the height of the rollers. Since each inner chain link of the chain can independently move along the axial direction, the operation of the entire chain is flexible. The utility model which is suitable for the variable speed bicycles has long service life.

Description

Chain for bicycle

The utility model relates to a kind of bicycle chain, particularly a kind of liner-less and turning round flexibly, and can rapid, easy, accurately be applicable to the chain of multi-speed bicycle.

Traditional bicycle chain, structure roughly as shown in Figure 1.It mainly comprises roller (11), inner chain sheet (12), outer chain sheet (13), chain rivet (14) and lining five kinds of members such as (15).When assembling, earlier lining (15) is erected to be fixed in the perforation (120) at an inner chain sheet (121) two ends, then roller (11) is sheathed on the lining (15), multiple another inner chain sheet (122) is fixed on the lining (15) held.Again chain rivet (14) penetration liner endoporus, and on its two ends articulate two outer chain sheets (131), (132), so described five component groups are dressed up one.This conventional construction has following shortcoming.Because wherein lining (15) and inner chain sheet (12) are pressed into cooperation, so two inner chain sheets and lining form a combination, independently activity, thereby not working each other.This chain then when the tooth of sprocket wheel is inserted between the inner chain sheet, can produce the active force of outwards dialling to inner chain sheet as being used for multi-speed bicycle, and two chain sheets are leaned against on the outer chain sheet along chain rivet axial displacement.Because two inner chain sheets and lining can not become flexible for closely cooperating, therefore after inner chain sheet abuts against on the outer chain sheet, be difficult to get back on the original position, can make whole chain not working, cause so-called locking (tight links) phenomenon.Moreover, also can shorten the working life of chain greatly.

The purpose of this utility model provides a kind of lining that does not possess conventional chains and adopted, and can turn round flexibly, is specially adapted to the bicycle chain of multi-speed bicycle.

Bicycle chain described in the utility model, comprise four members such as roller, inner chain sheet, outer chain sheet and chain rivet, wherein all be formed with to projecting inward flange around the perforation at two inner chain sheet two ends, described flange is relative in twos, be placed in the center hole of roller, played the lining effect in the conventional chains.Described chain rivet runs through the endoporus of described flange, and the chain rivet two ends then articulate with outer chain sheet.

Bicycle chain described in the utility model, separate in twos to projecting inward flange owing to formed around bore a hole in two inner chain sheet two ends up and down, do not resemble and be fixed as one inner chain sheet in the conventional chains and the lining, therefore the inner chain sheet running is very flexible, can not produce aforesaid locking phenomenon, the life-span of chain also prolongs greatly.

Below with reference to all accompanying drawings, bicycle chain described in the utility model is described in further detail.

Fig. 1 is the combination schematic representation of standard bicycle chain;

Fig. 2 is the stereogram of bicycle chain described in the utility model;

Fig. 3 is the embodiment's of the described bicycle chain of the utility model shape a combination schematic representation.

As Fig. 2 and shown in Figure 3, bicycle chain described in the utility model, comprise roller (2), inner chain sheet (3), outer chain sheet (4) and chain rivet (5), described inner chain sheet (3) is installed in described roller (2) both sides, described outer chain sheet (4) is installed in the outside of described inner chain sheet (3), and runs through aforementioned three members and be combined into one with described chain rivet (5).Described inner chain sheet (3) two ends are offered allow perforation (31) that described chain rivet (5) passes around, be formed with the flange (32) that protrudes to the inside, footpath outside the described flange (32), cooperate with the internal diameter of the center hole (21) of described roller (2), and flange (32) surround within the external diameter of the internal diameter in hole and described chain rivet (5) cooperate.

In embodiment of the present utility model, the protrusion height of flange (32), less than half of the height of described roller (2), more particularly, described flange (32) highly elect about 1 millimeter as.

From the above, the flange (32) of inner chain sheet (3) is sheathed in the center hole (21) of roller (2), has played the effect of the lining in the conventional chains, therefore only needs four kinds of members just can form chain.Because this chain does not have lining, therefore after the assembling, inner chain sheet can be along axial work the moving with respect to roller of chain rivet.In multi-speed bicycle, stir inner chain sheet when chain rivet moves axially when the tooth of sprocket wheel, inner chain sheet can rely on outer chain sheet neatly, makes that the axial clearance between the flange of two inner chain sheets up and down increases.Because between inner chain sheet and the roller is to be slidingly matched, each inner chain sheet all can be independent neatly movable, after speed-change and gearshift finishes, the inner chain sheet that relies on outer chain sheet can be got back on original position again neatly, it is quite flexible to turn round, can not produce the locking phenomenon, and also prolonged the life-span of chain widely.

Every is other any type of structure of foundation with inventive concept of the present utility model, all should be considered as belonging within the desired protection domain of the utility model.

Claims

1, a kind of bicycle chain, comprise roller (2), inner chain sheet (3), outer chain sheet (4) and chain rivet (5), described inner chain sheet (3) is installed in described roller (2) both sides, described outer chain sheet (4) is installed in the outside of described inner chain sheet (3), it is characterized in that, described chain rivet (5) runs through aforementioned three members and is combined into one, described inner chain sheet (3) two ends are offered allow perforation (31) that described chain rivet (5) passes around, be formed with the flange (32) that protrudes to the inside, footpath outside the described flange (32), cooperate with the internal diameter of the center hole (21) of described roller (2), and flange (32) surround within the external diameter of the internal diameter in hole and described chain rivet (5) cooperate.

2, bicycle chain as claimed in claim 1 is characterized in that, the protrusion height of described flange (32) is less than half of the height of described roller (2).

3, bicycle chain as claimed in claim 1 or 2 is characterized in that, described flange (32) highly elect 1 millimeter as.