CN2113380U - Chain joint - Google Patents

Abstract

The utility model relates to a joint for a chain. The joint is assembled at both end heads of the chain, so that the chain is formed into a sealed ring. The joint is composed of two sets of conjugant, and each conjugant is composed of a connecting piece and a connecting shaft, wherein, one end of the connecting shaft is pivoted on the through hole of the connecting piece of the same set, and the other end forms a slot of which the diameter is smaller than that of the through hole of the connecting piece; the top end of the slot is provided with a clamping withstanding edge of which the diameter is greater than that of the through hole of the connecting piece. When one end of the connecting shaft is combined with the connecting piece of the conjugant of the other set, the combination of the slot with the through hole can result in the movement, rotation and displacement between the connecting piece and the connecting shaft. The utility model can fix the inosculating of the connecting piece by the clamping of the clamping edge, so that the effect of the chain inosculating force after assembling can be reached.

Description

Chain joint

The utility model relates to a kind of joint of chain, and particularly a kind of back inlay resultant force that makes up is good and can avoid taking off the joint of the chain of chain.

Chain all was to be cut into predetermined length in advance, and when chain will be assembled on the sprocket wheel, was connected to form the loop of closed shape again with a joint when factory process becomes product in the past; The utility model is improved at the joint of the chain of bicycle use.

At first, see also Fig. 1, this figure is a kind of schematic representation of joint assembling of chain in the past, chain 5 was when combination in the past, mainly be that the installing chain rolls 52 between two inner chain sheets 51, assemble outer chain sheet 53 respectively in outer side, in, outer chain sheet 51, worn by chain rivet 54 between 53, articulate, after pivot joint, be closely between outer chain sheet 53 and the chain rivet 54 and combine, just, when outer chain sheet 53 turns, chain rivet 54 also can be along with rotation, and in order to increase the inlay resultant force between outer chain sheet 53 and the chain rivet 54, can impose riveted processing again on the termination of chain rivet 54 outstanding outer chain sheets 53, the slightly larger in diameter that makes the termination is in the penetration hole diameter of outer chain sheet 53, to increase inlay resultant force each other.

Please cooperate Fig. 2, this figure be a kind of chain in the past joint in conjunction with schematic representation, when the two ends of chain 5 in conjunction with the time, at first with stamping technology with chain rivet 54 downward punching presses, make the pivot joint between chain rivet 54 disengagings and the inner chain sheet 51, but another termination of chain rivet 54 still stay on the outer chain sheet 53, then, another termination of the chain of predetermined length is inserted between two outer chain sheets 53, mode with punching press oppositely heads into chain rivet 54 in the perforation of two outer chain sheets 53 again, just can finish the combination of chain 5 two ends; And carry out the combination of chain in the above described manner, in fact after assembling, can produce the not good shortcoming of product inlay resultant force; Please still consult Fig. 1, when chain 5 will outwards stamp out chain rivet 54 in the past, because chain rivet 54 peripheries impose riveted joint in advance, therefore the part body of rod of chain rivet 54 in fact is the perforation periphery that fastens a little at outer chain sheet 53, and deliberate it is outwards gone out, not only a termination of chain rivet 54 can be subjected to serious injury, the outer chain sheet that combines with it 53 perforation peripheries are expanded support therefore and slightly also, wearing and tearing when above-mentioned chain 5 two ends impose in conjunction with the time, what chain rivet 54 can be reversed again is pressed in 53 perforation of originally impaired outer chain sheet, what cause boring a hole comes to harm again, certainly, therefore chain rivet 54 through twice punching press also can come to harm once again, therefore, when its in conjunction with after the intensity of this part joint area will be damaged significantly, this is the not good main cause of inlay resultant force of the joint of chain in the past; In addition, be to be tight pressing between the outer chain sheet 53 of chain and the chain rivet 54 in the past, therefore, when chain rivet 54 is painstakingly outwards gone out, chain rivet 54 can be subjected to friction, damage equally with outer chain sheet 53 binding sites, and this also is another injury that the assembling mode of aforementioned joint is caused the chain inlay resultant force; When chain is made up with aforementioned manner in the past,, just chain rivet 54 can be extruded once again as long as combination place imposes the strength of 40-90 kilogram to chain rivet; The deficiency of above-mentioned inlay resultant force not only influences the quality of product, also can make the position of combination produce the phenomenon of taking off chain, and increase the danger that product uses.

Main purpose of the present utility model is that the joint that a kind of inlay resultant force is good, be difficult for producing the chain that takes off the chain phenomenon is being provided.

Major character of the present utility model is: joint is assembled in the chain two ends, and make chain form the link spring shape of sealing, it is made up of the fit institute of two windings, each conjugant has included contact pin and has connect axle, an end that connects axle is articulated on the same group the contact pin perforation, the other end forms the groove of a diameter less than the contact pin perforation, and the groove top is provided with the fasten edge of diameter greater than the contact pin perforation; When an end that connects axle combines with the contact pin of another winding zoarium, through combining of groove and perforation, can make contact pin and connect and be able to activity turn displacement between the axle, and through the clip that fastens edge, more can firmly chimeric contact pin, to reach the good effect of combination rear chain inlay resultant force.

That is to say, the utility model proposes a kind of joint of chain, this joint is assembled in the two ends of chain, it is characterized in that: described joint is made up of the fit institute of two windings, and each conjugant all includes contact pin and connects axle, is formed with two perforation in the contact pin, connecing axle is located in the perforation, an end that connects axle is assembled on the same group the contact pin, and the other end is formed with the groove of diameter less than the contact pin perforation, and the groove top is formed with the fasten edge of diameter greater than the contact pin perforation; When the connecing axle and engage of contact pin and another winding zoarium, in the contact pin the installing perforation that connects axle be embedded in the groove of another winding zoarium and be against and fasten on the edge.

Described connecing on axle and the end that the contact pin of another winding zoarium combines is formed with circular arc.

The perforation of described contact pin is greater than the diameter of joint groove but less than connecing the diameter that axle fastens edge.

Technological means is for achieving the above object now enumerated preferred embodiment and conjunction with figs., and after being described in more detail in, accompanying drawing is respectively:

Fig. 1 is the assembling schematic representation of the joint of chain in the past;

Fig. 2 be chain in the past joint in conjunction with schematic representation;

Fig. 3 is the utility model embodiment's a schematic side view;

Fig. 4 is that the utility model embodiment is combined in the combination cross-sectional schematic on the chain;

Fig. 5 is the schematic representation of the utility model embodiment in conjunction with chain.

At first, see also Fig. 3, the joint of the chain that the utility model proposes comprises two winding zoariums 6,8, and conjugant 6 or 8 all includes contact pin 1 and connects axle 2, be formed with two perforation 11,12 in the contact pin 1 respectively, the aperture of above-mentioned perforation 11,12 is between 3.56-3.58mm; And connect axle 2 are solid bodies of rod, above-mentioned body of rod diameter is 3.61mm, it mainly is that an end is located in the perforation 11 of contact pin 1 on the same group, and impose riveted at this end, make its slightly larger in diameter in perforation 11, and forming firm combination, the other end capitiform becomes joint end 21, is formed with width 1.2mm on the above-mentioned joint end 21; The groove 22 of diameter 3.5mm, the apical margin of groove 22 be diameter bigger fasten edge 23, be formed with arc surface 24 again at the apical margin of joint end 21 with camber line.

Please cooperate Fig. 4,5, when the joint of the chain that the utility model proposes will be assembled chain 7 two ends, at first 2 inner chain sheet 71 that pass chain 7 that connect of conjugant 6 are bored a hole, at this moment, the joint end 21 that connects axle 2 can be given prominence to outside the inner chain sheet 71, on the other hand another winding zoarium 8 oppositely is provided with, and make perforation 12 ' in its contact pin 1 ' connect axle 2 joint end 21 corresponding to conjugant 6, punching press downwards makes the perforation 12 ' of contact pin 1 ' in the arc surface 24 that connects axle 2 slips into the groove 22 that connects axle 2 then, and form firm combination, because contact pin 1 ' articulates movably with the combination that connects axle 2 and can freely movablely rotate; And when the joint of the chain that the utility model proposes will be in conjunction with chain 7 two ends, with above-mentioned two contact pin 1,1 ' stagger mutually (direction shown in Fig. 5 arrow), and with chain 7 another terminations directly to insert connect the axle 2, at this moment, the joint end 21 ' that connects axle 2 ' similarly can be given prominence to inner chain sheet 71 ', at last contact pin 1 is inwardly screwed in, and make perforation 12 corresponding to the joint end 21 ' that connects axle 2 ', punching press downwards again, the perforation 12 that makes contact pin 1 along the arc surface 24 ' clip that connects axle 2 ' on groove 22 ', and when contact pin 1 wear mouthfuls 12 when submerging the groove 22 ' that connects axle 2 ', the plate body of contact pin 1 also can be fastened edge 23 ' what connect axle 2 ' by resistance, and forms firm combination.

By above explanation as can be known, the arc surface that the joint of the chain that the utility model proposes forms on the joint end that connects axle, really can make contact pin when inside punching press, slip into easily in the groove that connects axle, and fasten the disengaging that edge also can prevent contact pin through the groove apical margin is formed because the joint of described chain in when combination as long as through a punch process, just can be with the in addition combination of chain two, therefore, for the perforation of contact pin and to connect the damage of axle extremely low; Because connect the formed arc surface in a top, can when the downward punching press of contact pin, be easier to slip in the groove that connects axle, connect the degree that the axle support is expanded to reduce the contact pin perforation, this is that the inlay resultant force of the joint of described chain is better than in the past another because plain; And when contact pin submerge connect the axle groove after, more fasten fastening of edge on the axle because connect, and has preferable inlay resultant force, therefore, by above-mentioned change, for chain, has the good advantage of inlay resultant force really, to avoid chain to produce the phenomenon of taking off chain in use, the joint of the chain that the utility model proposes can anti-180 kilograms strength after combination, (and being jin) still is unlikely to go to pot in the past, therefore, the improvement of the above-mentioned joint that the utility model proposes, for have really at chain inlay resultant force good, be difficult for taking off effects such as chain.

In sum, the utility model is very practical really.

Claims (3)

1, a kind of joint of chain, this joint is assembled in the two ends of chain, it is characterized in that: described joint is made up of the fit institute of two windings, each conjugant all includes contact pin and connects axle, be formed with two perforation in the contact pin, connect axle and be located in the perforation, an end that connects axle is assembled on the same group the contact pin, the other end is formed with the groove of diameter less than the contact pin perforation, and the groove top is formed with the fasten edge of diameter greater than the contact pin perforation; When contact pin and another winding zoarium connect axle and engage the time, in the contact pin the installing perforation that connects axle be embedded in the groove of another winding zoarium and be against and fasten on the edge.

2, according to the joint of the described chain of claim 1, it is characterized in that: connect on axle and the end that the contact pin of another winding zoarium combines and be formed with circular arc.

3, according to the joint of the described chain of claim 1, it is characterized in that: the perforation of contact pin is greater than the diameter of joint groove but less than connecing the diameter that axle fastens edge.

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