CN2176462Y

CN2176462Y - Chain joint

Info

Publication number: CN2176462Y
Application number: CN93224146U
Authority: CN
Inventors: 钟兴泉
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-14
Filing date: 1993-09-14
Publication date: 1994-09-07
Anticipated expiration: 2003-09-14

Abstract

The utility model relates to a chain joint which is composed of a contact piece, a chain plate and joint pins, wherein, both ends of the contact piece are respectively provided with a connecting hole which is provided with an incline guiding surface on one side at the end of the surface the same as the contact piece. One end of each of the two joint pins is fixed on the chain plate, the other end is provided with a neck, and the lateral border of the neck is an end with a bigger diameter. When the joint pins provided with the end penetrate the central through hole of a chain and is in butt joint with the connecting hole of the contact piece, the necks of the joint pins can be positioned in the connecting hole to be connected with the chain as long as the contact piece is clamped with the chain plate. The chain joint has the advantages of simple structure, cost saving, simple assembly and disassembly, and convenient operation.

Description

Chain joint

The utility model is a kind ofly to be specially adapted to the narrow formula chain that multi-speed bicycle is used in order to connect the joint at chain two ends, is a kind of group, unloads simple and easy, chain joint easily.

Common chain is the strip body after assembling, be cut into predetermined length by use condition again, utilizes joint that its two ends are coupled together then, and is combined into link spring shape.This joint is made of two carrier bars and two nipple pins and a jump ring, nipple pin one end is fixed therein on the carrier bar, the other end is provided with the less neck of diameter, establish jump ring at sheathed again another carrier bar of neck end and button, the positioning part by jump ring fastens the nipple pin neck couples together the chain two ends.Though this chain joint can play the effect that connects the chain two ends, its complex structure, and, when assembling, must strut the jump ring opening end with special tool, can make its positioning part fasten the neck of nipple pin; In its when dismounting, must strut the opening end of jump ring equally with instrument, therefore, in group, when unloading, not only must nationality with special tool, operation is also inconvenient, jump ring also falls easily.And, the narrow formula chain of multi-speed bicycle use at present, because of having a jump ring to make joint part broaden suddenly, can't use this chain joint, therefore, this narrow formula chain does not have joint, it can only directly couple together two ends with special tool or machine when assembling, and this makes it in group, more inconvenient when unloading.

The purpose of this utility model is to improve a kind of simple in structure of design at the problems referred to above, and is easy to operate, organizes, unloads easily, chain joint rapidly.

The technical solution of the utility model is achieved in that the utility model comprises a contact pin, a carrier bar and two nipple pins, it is characterized in that: an end of nipple pin is fixed in the perforation of carrier bar, the other end is provided with neck, the external side brim of neck is the bigger end of diameter, is convenient to nipple pin and can engages firmly with contact pin.

The nipple pin end thickness equates with the height of the outstanding chain plate portion of chain rivet, to prevent influencing the smooth compliance of the connection of chain and its running because of joint part broadens suddenly.

Respectively be provided with a conjugate foramen at the contact pin two ends, conjugate foramen is positioned at end one side and is provided with tilted guide surface with one side in contact pin, and the end of being convenient to nipple pin can successfully be passed conjugate foramen and make the nipple pin neck be positioned conjugate foramen and reach and connect chain and group, unload simple and easy, purpose rapidly.

Adopt the chain joint of said structure, reduced jump ring, and the connector portions width is identical with the width of chain portion, it is firm that chain is engaged.And this chain joint is simple in structure, and is easy to operate, saves cost, organizes, unloads simple and easy, rapid, very practical.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is this model utility structure sectional view;

Fig. 2 is this model utility contact pin part plan view.

As shown in Figure 1 and Figure 2, the structure of this model utility comprises 1, one carrier bar 2 of a contact pin and two cylinder-shaped joint pins 3.Contact pin 1 is the same with carrier bar 2 and carrier bar 9 profiles, and nipple pin 3 also is the same with the length and the diameter of chain rivet 8.One end of nipple pin 3 is fixed in the perforation of carrier bar 2, and the other end car is fluted, makes the less neck of a diameter 4, the external side brim of neck 4 is bigger ends of a diameter 5, and the height of neck 4 is identical with the thickness of contact pin 1, nipple pin 3 is engaged firmly with contact pin 1.

At the two ends of contact pin 1 conjugate foramen 6 is arranged respectively, conjugate foramen 6 same one side end one side that is positioned at contact pin 1 respectively punching press make one with the corresponding tilted guide surface 7 of groove of nipple pin neck 4, nipple pin end 5 can successfully be passed connect the hole to close 6 and make nipple pin neck 4 be positioned conjugate foramen 6, reach nipple pin 3 and engage firmly, and organize, unload conveniently, rapidly with contact pin 1.

In order to make chain operation freely suitable, flexible, and the requirement of the narrow formula chain of adaptation multi-speed bicycle, it is identical with the outstanding carrier bar 9 part height of chain rivet 8 that the thickness of nipple pin end 5 is made, and each chain purpose width of its joint part width of the chain of Jie Heing and chain is identical and be beneficial to the running of chain like this.

During practical operation, two nipple pins 3 that are connected with carrier bar 2 are passed the central hole at the chain two ends that need connection respectively, and with contact pin 1 to be provided with two conjugate foramens 6 of tilted guide surface 7 one side corresponding, at this moment, only with hand or common needle-nose pliers block the waist of contact pin 1 and carrier bar 2, nipple pin end 5 is just passed 6, two nipple pin nationalitys of conjugate foramen and outside tension force and make its neck 4 chimeric with conjugate foramen 6, the chain two ends is coupled together with engaging of contact pin 1 by nipple pin 3.During dismounting, same only need be used for or common needle-nose pliers blocks two nipple pins, contact pin 1 is pulled outwardly get final product.Organize, unload all very simple and easy, convenient.

Claims

1, a kind of chain joint comprises contact pin 1, carrier bar 2 and nipple pin 3, it is characterized in that contact pin 1 is provided with conjugate foramen 6, and an end of nipple pin 3 is fixed on the carrier bar 2, and the other end is provided with neck 4, and the external side brim of neck 4 is bigger ends of diameter 5.

2, chain joint according to claim 1 is characterized in that conjugate foramen 6 is provided with tilted guide surface 7 in contact pin 1 with end one side simultaneously.

3, chain joint according to claim 1 is characterized in that the thickness of nipple pin end 5 equals the height of chain rivet 8 outstanding carrier bar 9 parts.