CN2143693Y - Improved structure chain joint - Google Patents

Abstract

The utility model relates to a structurally improved chain joint. Concave edges are formed on both sides of the pin hole of the splice of the chain joint. The through holes with small diameter are formed in the concave edge at one side, while big and small orifices are arranged in the concave edge at the other side. The space between the small round orifice and the through hole is equal to the space between two joint chain pins. The joint chain pin and through hole of the splice can be linked with the assembly of one end of a chain. The chain can be installed on the bicycle with the combination of the other joint chain pin, the parts of small and big round orifices of the splice, and the assembly of the other end of the chain. Thus, a joint design is rapidly assembled.

Description

Improved structure chain joint

The utility model relates to a kind of structure improved chain joint, and You Zhiyi can assemble fast, to improve the improvement design of bicycle manufacturing works production line speed of production.

The manufacture of present chain, be earlier chain to be made strip, and then according to the chain of required chain joint number intercepting suitable length, when desire is mounted on chain on the bicycle, can earlier chain one end be around between forward and backward fluted disc, then relend and help chain joint that the chain two ends are connected, chain ring is located between forward and backward fluted disc, so as to reaching the purpose of transmission.

Being seen in the past chain is the mode of squeezing into chain pin of adopting, the chain two ends are connected, but this kind structure trouble comparatively in assembling, and easily make each member produce respectively reaming, stuck, situation such as come off; Given this be that the someone designs a kind of improved type joint, it is that the pitch design between two pin-and-holes of joint contact pin is the kenel less than two joint chain pin pitches, when the middle assembly at chain two ends penetrates the joint chain pin in regular turn, two joint chain pins can be claimed to pull system toward between two chain pins, after making the distance shortening between two joint chain pins, again tab engagement is formed on the chain pin, after power to be pressed disappears, even chain pin neck place and pin-and-hole are top system state, chain is connected in the form of a ring, though the assembling of the joint structure of right this kind structure kenel is gone up convenient than traditional jointing, but still can produce many disappearances in the use, when especially cooperating, not only can have a strong impact on speed change efficient, and easily outer plate be dialled with group chain device.

Present existing chain joint, it is to be connected the chain two ends by one group of freestanding joint structure, therefore must be earlier when assembling the two joint chain pins that are combined into one with outer plate be passed assembly in the chain two ends respectively, again contact pin one end is engaged with a chain pin in advance, multiple with contact pin opposite side and the combination of another chain pin, with whole Assembly Action, must be by four to five Assembly Actions, if general Consumer buys chain voluntarily when assembling voluntarily, still the unlikely worry that causes the assembling trouble, but in the considerable bicycle of daily output manufacturing works, too numerous and diverse chain assembly program, promptly cause the burden of production line, especially be for independently individual because of joint, all be not engaged togather with the arbitrary end of chain, so must take out assemblying in an outer plate of having fixed two joint chain pins and the chain two ends earlier in when assembling, taking out another joint contact pin again makes up, in the part of taking, between parts, promptly can make built-up time increase the relative manufacturing efficiency that promptly can influence bicycle manufacturing works.

The main purpose of the utility model design is to overcome the above-mentioned defective of prior art and a kind of structure improved chain joint is provided, it is that chain joint is designed to can be earlier and assemblying all-in-one-piece structure kenel in chain one end, during to bicycle manufacturing works, only the middle assembly of the chain the other end must be engaged with the joint the other end and get final product, provide the design that to assemble fast, so as to the built-up time of reduction bicycle manufacturing works.

The utility model provides a kind of structure improved chain joint, this joint is by an outer plate, one contact pin cooperates with two joint chain pins, and assembly in the chain two ends is connected, make chain kenel in the form of a ring, wherein two joint chain pins can be fixed in the pin-and-hole place, both sides of outer plate, the other end appropriate location of joint chain pin then forms the less neck of diameter, pin-and-hole upper end, contact pin both sides all forms recessed edge, it is characterized in that: form the little perforation of the more recessed edge of diameter in the recessed edge of contact pin one side, form big hole towards the perforation side in the recessed edge of opposite side, the big hole outside is connected small sircle hole, pitch between small sircle hole and perforation equals the pitch between two joint chain pins, can be earlier will pass the middle assembly of chain one end with the fixing earlier chain pin of outer plate, and it is fixed with the perforated portion riveting of contact pin, when desire is assembled in chain on the bicycle, only must be with middle assembly and another joint chain pin of the chain the other end, the big or small round hole part of contact pin divides and cooperates blocking, can obtain a design of assembling fast.

Further specify structure characteristic of the present utility model and purpose below in conjunction with accompanying drawing.

Fig. 1 is the three-dimensional exploded view that the utility model joint cooperates with assembly in chain one end;

Fig. 2 is the sectional drawing after the utility model joint and the combination of chain one end;

Fig. 3 is the plan view of the utility model chain the other end and splice combinations;

Section action diagram when Fig. 4 is the utility model chain the other end and splice combinations;

Fig. 5 is the combination section after the utility model chain the other end and the splice combinations.

Please referring to shown in Figure 1, joint of the present utility model is by two outer plates 10, contact pin 20 and two joint chain pins 30 combine, please cooperate referring to shown in Figure 2, form two pin-and-holes 11 on the outer plate 10, the T-shape head 31 of two joint chain pins 30 is equipped in outer plate 10 pin-and-holes 11 in advance, and contact pin 20 its both sides pin-and-holes 21, design in 22 is also different, form the recessed edge 211 of sagged shape in the pin-and-hole 21, centre forms and to run through but the more recessed edge of diameter is little perforation 212 in recessed edge 211, and also form the recessed edge 221 of sagged shape in the pin-and-hole 22, form the big hole 222 that runs through towards the carrier bar centre in the recessed edge 221, big hole 222 outsides then are connected a small sircle hole 223, the spacing that perforation 212 and big hole are 222 is less than the spacing of 30 of two joint chain pins, bore a hole 212 and the spacing of 223 of small sircle holes then equal the spacing of 30 of two joint chain pins, form the design of round end shape in the other end end of joint chain pin 30T type head 31 in addition, the bottom appropriate location forms the less neck 32 of diameter.

When chain manufacturing works, according to the chain specification chain is cut into suitable length earlier, please cooperate referring to shown in Figure 2, then will pass the middle assembly 40 of chain one end with the joint chain pin 30 that outer plate 10 has been formed one, and perforation 212 ends that make contact pin 20 snap in neck 32 places of joint chain pin 30, and it is the 30 round end place rivetings of joint chain pin are fixed, even the middle assembly of joint one side and chain one end is combined in advance, the opposite side of contact pin 20 this moment can the deflection mode pushes up and is formed on joint chain pin 30 upper ends, also can be crooked shape shown in Figure 3.

And bicycle manufacturing works desire is when being mounted on chain on the bicycle, before can earlier chain one end being passed, between rear tooth disk, please referring to shown in Figure 3, then push the contact pin 20 of joint aside suitable angle, middle assembly 50 with the chain the other end pierces on joint chain pin 30 afterwards, and contact pin 20 moved to joint chain pin 30 upper ends, and with joint chain pin 30, outer plate 10 is slightly toward the compacting of perforation 212 directions, please cooperate referring to shown in Figure 4, make joint chain pin 30 ends pass big hole 222, when reaching to joint chain pin 30 necks 32 to big hole 222 places, can loosen joint chain pin 30 joint chain pin 30 is restored to the original state, the small sircle hole 223 of contact pin 20 this moment promptly is the blocking state with the neck 32 of joint chain pin 30, as shown in Figure 5, and joint chain pin 30 heads are embedded in the recessed edge 221, and the chain two ends are engaged togather by joint.

Improvement design by the utility model joint, when bicycle manufacturing works, only must can the chain two ends be connected in the form of a ring by joint by piercing two actions of middle assembly, blocking contact pin, therefore whole Assembly Action can reduce half, and because of joint is fixed with chain one end earlier, so can reduce the action of the part of taking, the bicycle manufacturing works a lot of for the daily output, promptly can reach the effect of simplifying flow process, increasing speed of production, be a design of very having a practicability; Moreover, by the meter that fills of the present utility model, only a side connector chain must be sold to interior compacting during assembling, so act of operation is easier, even but also quick combined of the technician of lack of skill.

Claims (1)

1, a kind of structure improved chain joint, this joint is by an outer plate, one contact pin cooperates with two joint chain pins, and assembly in the chain two ends is connected, make chain kenel in the form of a ring, wherein two joint chain pins can be fixed in the pin-and-hole place, both sides of outer plate, the other end appropriate location of joint chain pin then forms the less neck of diameter, pin-and-hole upper end, contact pin both sides all forms recessed edge, it is characterized in that: form the little perforation of the more recessed edge of diameter in the recessed edge of contact pin one side, form big hole towards the perforation side in the recessed edge of opposite side, the big hole outside is connected small sircle hole, pitch between small sircle hole and perforation equals the pitch between two joint chain pins, can be earlier will pass the middle assembly of chain one end with the fixing earlier chain pin of outer plate, and it is fixed with the perforated portion riveting of contact pin, when desire is assembled in chain on the bicycle, only must be with middle assembly and another joint chain pin of the chain the other end, the big or small round hole part of contact pin divides and cooperates blocking, can obtain a design of assembling fast.

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