CN2123653U - Improved chain axle of chain - Google Patents

Abstract

The utility model relates to a structurally improved chain axis which is penetrated in the through hole of two outer chain links. The end faces of the chain axis are protruded outside the plate body of the outer chain links. The utility model is characterized in that an axial groove is formed by two inwardly oriented end faces of the chain axis. An annular axial wall is formed between the groove and the outer diameter of a rod. In addition, a plurality of axial slots are formed on the axial wall. Fan-shaped jogged sections are formed between each two slots. When the chain axis is arranged between the two outer chain links and the end planes are riveted, each two jogged sections which are equally spaced can be easily and evenly outwardly folded and extended so as to increase the jogged force between the chain axis and outer chain links.

Description

Improved chain axle of chain

The utility model relates to a kind of chain rivet of chain, is meant especially when chain rivet to pass outer chain sheet when perforation, and it is bigger that it is capped on around the outer chain sheet perforation area of rim, takes off the chain rivet of power to resist between the outer chain sheet that increases chain rivet and assembling.

Common chain mostly be inside and outside chain sheet, chain rolls and the perforation of member such as lining in wear coaxial solid chain rivet, through the combination of last chain rivet, each member on the chain can be made up.After the combination, aforementioned outer chain sheet is positioned at chain rivet both ends of the surface inboard.When using at single speed ratio level bicycle, chain can keep normal straight line running, and at this moment, outer chain sheet and the sprocket almost parallel that engages are than the phenomenon that is difficult for the generation flake.And when chain used at the multistage multi-speed bicycle, chain was increased by the probability of oblique drawing, and is firm inadequately if outer chain sheet combines with the chain between centers at this moment, tilts with regard to very easily causing outer chain sheet to be stirred by sprocket or comes off, and causes the generation of tight order or danger.Therefore, the linking steady character between above-mentioned chain rivet and outer chain sheet can directly have influence on the safety that chain uses.The utility model is improved at the end face of above-mentioned chain rivet, in the hope of promoting the anti-power of taking off between chain axial end and outer chain sheet.

At first, see also Fig. 1,2, this figure is the sectional view of chain chain rivet in the past and is assembled in schematic representation on the chain, and common chain chain rivet 1 is the solid body of rod of cylinder, and it is solid plane that body of rod both ends of the surface 11 are; When above-mentioned chain rivet 1 is assembled on the chain 2, its end face 11 can be piercing in the perforation 211 of outer chain sheet 21, but because of aforementioned chain rivet 1 end face 11 is a solid design, carry out riveted at chain rivet 1 end face 11 and add man-hour, its solid end face 11 abducent body of rod positions are limited, thereby cause the anti-power of the taking off deficiency of 21 of chain rivet 1 and outer chain sheets; In order to improve above-mentioned shortcoming, also have on the chain rivet both ends of the surface at present to form groove, to increase the easy degree that the chain axial end is turned up.But the improvement of the aforementioned reel structure of chain in the past is still undesirable in the use.

Then, see also Fig. 3, this figure is the another kind of stereogram of chain chain rivet in the past.It mainly is to form axial notch 31 respectively on chain rivet 3 both ends of the surface, at groove 31 to then forming the continuous curved surface axial wall 32 of ring-type between chain rivet 3 outer walls; When chain rivet 3 will with the outer chain sheet of chain in conjunction with the time, impose punching press to chain rivet 3 end faces, just can make axial wall 32 outwards rout up, expand, to increase anti-the take off power of chain rivet 3 between boring a hole with outer chain sheet.But it is more or less freely when the structure of aforementioned chain rivet 3 no doubt can make end face turn up, but because of the axial wall 32 of chain rivet 3 is " continuous curve surface ", therefore the axial wall 32 of ring-type is easy to generate the phenomenon that pins down mutually when riveted, and making axial wall 32 can't obtain to expand uniformly effect, its anti-power of taking off also can't reach perfect boundary naturally; On the other hand can't be even because of axial wall 32 outside expansions, therefore, axial wall 32 outstanding length are bound to can't be oversize, otherwise the phenomenon that the axial wall 32 of continuous curve surface pins down mutually when riveted can be more serious, and this also is that its end face is coated over effectively cause of increased of the outer area of outer chain sheet perforation.

Main purpose of the present utility model is when providing a kind of chain rivet to combine with outer chain sheet, and it is big and even that it is capped area, to increase the anti-chain chain rivet of power that takes off of chain.

Major character of the present utility model is: the chain rivet both ends of the surface form axial notch respectively, and to forming the ring-type axial wall between body of rod outer side wall, above-mentioned axial wall top forms some flutings again at groove, then is a section equidistant embedding part in twos between fluting; When the chain rivet both ends of the surface were subjected to punching press, the embedding part of these a section equi-spaced apart just can outwards be routed up easily, expand, and was overlayed on rim around the outer chain sheet perforation that combines, and had good resistance to take off power so that make between outer chain sheet and chain axial end.

For reaching above-mentioned purpose, technological means that is adopted and effect thereof now enumerate preferable feasible embodiment, and conjunction with figs. are described in detail as follows:

Fig. 1 is a kind of sectional view of the chain rivet of chain in the past;

Fig. 2 is that a kind of chain rivet in the past is assembled in the schematic representation on the chain;

Fig. 3 is the another kind of stereogram of chain chain rivet in the past;

Fig. 4 is the stereogram of the preferable possible embodiments of the utility model;

Fig. 5 be the preferable possible embodiments of the utility model and chain part group upright after the front view of riveting status not;

Fig. 6 is the cross-sectional schematic of riveting status not after the combination of the preferable possible embodiments of the utility model and chain part;

Fig. 7 is the front view of preferable possible embodiments of the utility model and the upright back of chain part group riveting status.

Fig. 8 is the cross-sectional schematic of preferable possible embodiments of the utility model and chain part combination back riveting status.

See also Fig. 4.The chain rivet 4 that the utility model proposes is the solid body of rod by and large.Body of rod both ends of the surface 41 centers inwardly form axial groove 42 respectively.Groove 42 inner side surface ecto-entads are done taper gradually and are shunk, and form ring-type inwall 421 wide outside and narrow inside, at inwall 421 to then forming thick axial wall 43 in outer the approaching between body of rod outer side wall.Above-mentioned axial wall 43 apical margins six the equidistant flutings 44 that cave in again, slotting 44 in twos then is a section embedding part 431.In order to reach the purpose of this utility model, the quantity of above-mentioned fluting 44 can according to need and decide (for example can be: two, three, four).

Please cooperate Fig. 5,6 again.When the chain rivet 4 that the utility model proposes is desired to be assembled on the chain 5, chain rivet 4 both ends of the surface 41 are passed outside two perforation 511 of outer chain sheet 51 respectively.At this moment, the fluting 44 bottom rims of chain rivet 4 are a little more than the plate body outer side surface of outer chain sheet 51; The then existing chain rivet overhang of height that chain rivet 4 both ends of the surface 41 protrude in outer chain sheet 51 outer side surfaces is many.

Cooperate Fig. 7,8 again.Add man-hour when chain rivet 4 two ends are subjected to riveted, the embedding part 431 that each equi-spaced apart is arranged promptly can outwards be routed up, and is coated over rim around the perforation 511 of outer chain sheet 51.Because separated by a section fluting 44 between the embedding part in twos 431 of chain rivet 4, therefore when riveted not only the embedding part 431 on the axial wall 43 can not pin down mutually, and outwards expansion easily and equably, more because of the embedding part on the chain rivet 4 431 outwards expansion easily, so it protrudes in outer chain sheet 51 outer length can be many more in the past, and making embedding part 431 after chimeric with outer chain sheet 51, it is bigger than in the past that it is capped area, so that the anti-power of taking off of more effective increase chain outer chain sheet and chain between centers.

By above explanation as can be known, main purpose of the present utility model is the groove that forms indent on the chain rivet both ends of the surface, on the axial wall of groove outside rim, form opening fluting up one by one again, formation through above-mentioned fluting, can make the embedding part between two flutings can not pin down mutually each other, and evenly outwards expansion easily.Again because of its expansion easily, more can therefore increase the length of chain rivet both ends of the surface, and then increase chain rivet and outer chain sheet perforation and be capped area between rim on every side.The above-mentioned effective increase that is capped area can be avoided stirred by external force with its chimeric mutually outer chain sheet and just produce the phenomenon that comes off easily.Therefore, the chain rivet that the utility model proposes for the product of chain, has splendid " anticreep power " in the improvement of above-mentioned structure really

Claims (1)

1, a kind of chain rivet of structure improved chain, this chain rivet are the solid body of rod, and body of rod both ends of the surface form axial groove respectively; It is characterized in that: recessed inwall forms a plurality of flutings to forming the ring-type axial wall between body of rod external diameter on axial wall, above-mentioned fluting separates into several separated in twos embedding parts with aforementioned axial wall.

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