CN2127752Y - Chain joint - Google Patents

Abstract

The utility model relates to a chain joint which comprises a joint pin and a contact piece, wherein, one end of the joint pin is pivoted on the through hole of the contact piece, the other end is formed into a neck with smaller diameter, and the lateral border of the neck is an end with a bigger diameter. A connecting hole which is formed on the contact piece is formed by intersecting a big circle and a small circle; the diameter of the big circle is greater than that of the end of the joint pin, and the diameter of the small circle is smaller than that of the end of the joint pin. When one end of the joint pin with an end penetrates both ends of a chain and the big circle of the contact piece, the joint pin can be pulled apart toward both sides, so that the neck of the joint pin is positioned on the small circle of the contact piece, and accordingly, the effect of easy and convenient assembly and disassembly can be obtained.

Description

Chain joint

The utility model system relevant for a kind of in order to connect the joint at chain two ends, particularly a kind of group unload easily, convenient, chain joint that must instrument.

Common chain is to be the strip body after assembling, its severing need be become predetermined length according to using again, utilizes joint that its two ends are connected then, and is combined into link spring shape; But because at present common joint textural still undesirable, causes group, shortcoming is still arranged when unloading; The utility model is improved at unfavorable place on the above-mentioned chain configurations again.

At first, see also Fig. 1, it is a kind of three-dimensional exploded view of chain joint in the past, common chain joint 1 main member comprises 11,12, two nipple pins 13 of two chain sheets and joint clip 14, nipple pin 13 1 ends are fixed on the same chain sheet 11, the other end forms the less neck 131 of diameter, establishes joint clip 14 at sheathed again another chain sheet 12 of neck 131 ends and button; And be formed with on the joint clip 14 fluting 141, in the fluting 141 two ends form again two with nipple pin 13 with wide positioning part 142.

See also Fig. 2,3, be a kind of chain joint in the past be assembled on the chain just, plan view, when chain joint 1 in the past will be in conjunction with chain 2 two ends, the two ends perforation 21 that the other end that one end is combined in two nipple pins 13 on the chain sheet 11 simultaneously passes chain 9 respectively, again in having neck 131 ends cover chain link sheet 12, establish joint clip 14 in above-mentioned neck 131 corresponding positions, and the positioning part 142 of joint clip 14 is located in respectively on the neck 131 of two nipple pins 13.

The assembling mode of aforementioned chain joint 1 no doubt has the effect in conjunction with chain 9 two ends, but maximum in the use disappearance is: assembling inconvenience; Because aforementioned chain joint 1 must strut the opening end of joint clip 14 flutings 141 with instrument when assembling, its positioning part 142 is located in respectively on the neck 131 of two nipple pins 13, must support above-mentioned joint clip 14 two ends with instrument equally during its dismounting, therefore, group, not only must be when unloading with instrument, also extremely inconvenient in the operation; In addition, chain joint 1 was after combination in the past, be positioned at chain 9 ends except combination chain sheet 12, also must detain and establish joint clip 14,14 manner that fit of above-mentioned chain sheet 12 and joint clip can make the position width of chain 9 assembling joints 1 increase suddenly, and the smooth degree of influence assembling chain 9 runnings, above-mentioned structure is if use when the employed narrow formula chain of multi-speed bicycle, and shortcoming will be more remarkable.

Main purpose of the present utility model is to provide a kind of group, unloading simple and easy, chain joint structure rapidly.

Major character of the present utility model is: the utility model comprises two nipple pins and two contact pin, two nipple pin ends are assembled in respectively on the circular perforations of two contact pin, in contact pin, form the conjugate foramen that occurs simultaneously and form by large and small circle again, great circle is near the nipple pin that articulates on the above-mentioned conjugate foramen, its diameter is greater than the bar footpath of nipple pin, so that the other end for the corresponding joints pin wears, locatees, and axis of small circle is less than the joint pin rod directly, but greater than the formed neck in nipple pin end; Being oppositely arranged of two contact pin of mat work can make the nipple pin the other end that is assembled in the contact pin insert via the great circle of another contact pin, and be positioned on the roundlet, reaches group, unloads easy effect.

Second of the present utility model is characterised in that: the roundlet outboard peripheries in tab engages hole forms the chamfering annular groove, and on the end on nipple pin neck top, form corresponding chamfering annular groove, the filler ring of mat work nipple pin is embedded at the chamfering groove of contact pin, contact pin is engaged with nipple pin firmly, nipple pin end portion thickness is sunk in the contact pin, under the situation that does not reduce the nipple pin end thickness, effectively reduce the thickness of end nipple for contact pin, and then width after the minimizing entire combination, be beneficial to the connection of narrow formula chain.

Technology for achieving the above object, means are now enumerated preferred embodiment and are cooperated diagram, and after being described in detail in, wherein diagram is respectively:

Fig. 1 is a kind of joint three-dimensional exploded view of chain in the past.

Fig. 2 is that a kind of chain joint in the past is assembled in the front view on the chain.

Fig. 3 is that a kind of chain joint in the past is assembled in the plan view on the chain.

Fig. 4 is the decomposition plan view of the preferable possible embodiments of the utility model.

Fig. 5 is the front view of the preferable possible embodiments contact pin of the utility model.

Fig. 6 is the schematic perspective view that the preferable possible embodiments of the utility model will engage the chain two ends.

Fig. 7 is the assembled sectional view of the preferable possible embodiments of the utility model.

Fig. 8 is the running schematic representation of the preferable possible embodiments of the utility model.

Fig. 9 is the top exploded view of the another kind of preferable possible embodiments of the utility model.

Figure 10 is the chain sheet front view of the another kind of preferable possible embodiments of the utility model.

Figure 11 is that the another kind of preferable possible embodiments of the utility model engages the chain schematic representation.

Figure 12 is that another preferable possible embodiments of the utility model engages the chain schematic representation.

At first, see also Fig. 4,5, the utility model comprises that 4,5, two nipple pins of 2,3 and two contact pin of two nipple pins, 2,3 structures are identical, be formed with the less neck of diameter 21,31 in the nipple pin end, neck 21,31 tops are formed with the bigger end of diameter 22,32; And two contact pin 4,5 structures are also identical, be formed with circular perforations 41,51 in the contact pin, respectively for two nipple pins, 2,3 location, on plate body, be formed with joining hole 42,52, above-mentioned joining hole 42(52) by large and small round 421(521), 422(522) occuring simultaneously mutually forms, great circle 421(521) diameter is greater than nipple pin 2,3 ends 22,32, and roundlet 422(522) diameter less than the end 22,32 of nipple pin 2,3, but more than or equal to the neck 21,31 of nipple pin 2,3.

Please cooperate and consult Fig. 6,7, when present embodiment will be in conjunction with chain 6 two ends, nipple pin 2 is fixed in the perforation 41 of contact pin 4, an end that makes nipple pin 2 have end 22 again passes the center through hole 61 of chain 6, one end of nipple pin 3 similarly also is positioned in the contact pin 5, the other end also passes another through hole 62 of chain 6, at this moment, contact pin 4, conjugate foramen 42 on 5,52 with nipple pin 3,2 end 32,22 is corresponding, when the nipple pin of setting up relatively 3,2 will insert corresponding contact pin 4,5 conjugate foramen 42,52 o'clock, end 32,22 can be via great circle 421,521 insert, and when chain 6 two ends respectively when both sides are drawn back, nipple pin 3, neck 31 on 2, therefore 21 just can be positioned at contact pin 4,5 roundlet 422, on 522, and form firm combination.

So the utility model will be arranged on roundlet 422,522 in the contact pin 4,5 away from nipple pin 2,3 ends that are pivoted, mainly be chain 6 in use, two ends can be to both sides drawing (as shown in Figure 8), therefore, when chain 6 in the running, two nipple pins 2,3 can inwardly not pushed because of the running of chain 6, to promote the Security of assembling chain.

Previous embodiment can be assembled on the general conventional chains, if the utility model will use when narrow formula chain, the end nipple of nipple pin just must be dwindled for the width on the chain, could match with the width of chain, its structure is as Fig. 9, shown in 10, same, nipple pin 71,72 ends are hubbed on contact pin 73 respectively, on 74, and in contact pin 73, have equally on 74 by greatly, the conjugate foramen 731 that roundlet occurs simultaneously and forms, 741, the present embodiment greatest feature is: nipple pin 71,72 neck 711,721 outsides form the groove 712 of chamfering groove again, 722, and in contact pin 73,74 roundlet positions are formed with the filler ring scrobicular ring 732 that ring cooperates, 742.

See also Figure 11, the above-mentioned groove 712,722 of mat work is in the formation of scrobicular ring 732,742, can make nipple pin 71,72 sink in the contact pin 73,74, protrude in the width of contact pin 73,74 to reduce nipple pin 71,72, and be beneficial to the assembling of narrow formula chain at the part body of rod after the assembling.

The disclosed contact pin of previous embodiment is planar, and the chain outer plate of its joint also is planar, therefore, when above-mentioned planar tab engages behind chain, width between two contact pin roughly equates with two outer plates of chain, so can match,, each chain purpose width of chain is beneficial to running so that equating with chain with planar outer plate; A kind of chain is arranged in addition in order to be more conducive to speed change, and the outside punching press in plate body position between outer plate two perforation is formed floating convex, to enlarge two width between the outer plate, though the design of above-mentioned outer plate floating convex helps the speed change of chain, but first and second embodiment's of the utility model planar contact pin is used when the above-mentioned chain, will make chain cochain purpose width dwindle suddenly, and influence the smooth degree of chain speed change; In order to improve above-mentioned shortcoming, contact pin of the present utility model also can be as shown in figure 12, make the perforation 81 of contact pin 8 press formation floating convex 83 to a side blow with conjugate foramen 82 central positions, above-mentioned conjugate foramen 82 is also occured simultaneously mutually by two large and small circles 821,822 and forms, great circle 821 is encircled depressed part 823 near the floating convex 83 of plate body and form on the roundlet 822; The formation of floating convex 83 in the above-mentioned contact pin 8 of mat work, can with narrow formula chain on have a relief portion carrier bar match, when making joint be assembled in narrow formula chain, have identical width each other, make the chain of assembling more perfect in the running.

By above explanation as can be known, the utility model forms the conjugate foramen that is occured simultaneously mutually by large and small circle in contact pin, above-mentioned conjugate foramen also can wear, locate for the neck of nipple pin, the improvement of the above-mentioned structure of mat work, can make the chain two ends when assembling, need only the conjugate foramen that two nipple pin ends is arranged in contact pin respectively, draw back to both sides again, just the chain two ends can be assembled, therefore, the utility model was easier, easy in assembling; And second, the 3rd embodiment of the utility model unloads easy effect except having group, the chamfering groove that forms, the filler ring design, also can make the outstanding reduced width in nipple pin end, and under the situation that does not influence joint strength, dwindle the width after joint integral body engages, help the use of narrow formula chain, therefore, the change of the above-mentioned structure of the utility model had the enhancement on the effect really more in the past, used to cooperate narrow formula chain.

In sum, the utility model is very practical really.

Claims (4)

1, a kind of chain joint, comprise contact pin and nipple pin, contact pin is provided with perforation, one end of nipple pin is hubbed in the perforation of contact pin, and the other end is provided with neck, it is characterized in that being formed with in the contact pin conjugate foramen, conjugate foramen is occured simultaneously mutually by large and small circle and forms, axis of great circle is greater than the nipple pin end diameter, and little diameter of a circle is less than the nipple pin end, but greater than the neck of nipple pin.

2,, it is characterized in that little diameter of a circle less than the nipple pin end, but equal the neck of nipple pin according to the described chain joint of claim 1.

3, according to the described chain joint of claim 1, it is characterized in that the neck external side brim of nipple pin is formed with the groove of chamfering groove, be formed with the filler ring that ring cooperates on the roundlet of contact pin.

4,, it is characterized in that being formed with relief portion between the perforation of contact pin and the conjugate foramen according to the described chain joint of claim 1.

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