CN2168123Y

CN2168123Y - Two-layer type outer chain-sheet

Info

Publication number: CN2168123Y
Application number: CN 93218496
Authority: CN
Inventors: 吴能家
Original assignee: Yuemeng Enterprise Co ltd
Current assignee: Yuemeng Enterprise Co ltd
Priority date: 1993-07-28
Filing date: 1993-07-28
Publication date: 1994-06-08
Anticipated expiration: 2003-07-28

Abstract

The utility model relates to a two-layer type outer chain sheet assembled on a chain. The outer circumferential edge of a sheet body whose shape is less than a standard specification is flatly pressed and enlarged to form an outer layer, the thickness of which is thinner. An inner layer and an outer layer with flat and straight fall are formed on the sheet body. The inner layer maintains the original thickness of the sheet body, the thickness of the outer layer becomes thinner, and the outer layer is arranged on the full circumferential edge of the sheet body. One side of the outer layer with the flat and straight fall is positioned on the inner side surface of a chain after the outer layer is assembled. When the two-layer type outer chain sheet is assembled on the chain, due to the fact that the outer layer and the inner layer of the two-layer type outer chain sheet assembled on a chain have the flat and straight fall, the frictional contact area between the sheet body and the inner chain sheet can be reduced after the utility model is assembled, and the operative flexibility of the chain which is assembled can be gained.

Description

Two-layer type outer chain-sheet

The utility model relates to a kind of outer chain sheet that is assembled on the chain, particularly relate to a kind of straight drop that utilizes on the lamellar body to be produced, the friction contact surface that reduces between combination back lamellar body and inner chain sheet is long-pending, promote the sensitivity of chain speed change by this, and avoid making up the two-layer outer chain sheet that the back produces tight order, dead order probability; And the utility model relates to a kind of outer chain sheet that is assembled on the chain, particularly relate to a kind of can be when improving the flexibility of assembling chain operation, more can reduce the friction probability between lamellar body and side sprocket wheel, the two-layer outer chain sheet of smoothness when assembling chain operation and speed change to improve.

Outer chain sheet is a kind of outermost member of chain that is assembled in the prior art, and quality of its structure design can directly have influence on the flexibility of assembling chain operation, and the smooth degree during speed change, and the utility model is promptly improved at this member of chain.

At first, seeing also Fig. 1, is a kind of outer chain sheet stereogram of chain in the past, in the past outer chain sheet 1 mainly be on lamellar body two arc end part 11, form respectively always to perforation 12, have the waist 13 that a top, bottom all are the curved arc shape in two 12 of perforation; When outer chain sheet 1 is assembled on the chain 2 in the past, then as shown in Figure 2, at first in the perforation 211 of two inner chain sheets, 21 correspondences, assemble a lining 22, assemble a chain again at lining 22 external diameters and roll 23, then plug a chain rivet 24 in its center through hole 221, the perforation 12 that 24 liang of projection ends of above-mentioned chain rivet are passed outer chain sheet 1 more respectively, and form riveted joint shape is with aforementioned components combination forming in addition.

When two members after pivot joint often relatively during turn, its area corresponding to each other, contact is big more, the surface friction drag that is produced when rotation relatively is just big more; With regard to the design of chain 2, its inside and

outside chain sheet

21,1 in assembling back must be the axle center turn with chain rivet 24 often, therefore, rubbing contact area is big more to each other for it, be easy to more produce sting tight, to kill be tight order, dead purpose phenomenon, the then reduction that the flexibility of chain 2 runnings will be relative, the combination back produces tight order, dead purpose probability also can increase relatively, tight order after the aforementioned combination and dead order are when finished product dispatches from the factory, must detect, redress again in the quality inspection process, this finishing situation is many more, and just more for having some setbacks, cost also phase shape increases on making.By the design of outer chain sheet 1 in the past as can be known, the inside and outside side of its lamellar body all is planar, therefore, when it is assembled on the

chain

2,21 rubbing contact areas of lamellar body and inner chain sheet promptly are periphery in two arc end part 11 of whole outer chain sheet 1, above-mentioned rubbing contact area high, the flexibility in the time of can reducing chain 2 runnings, it can increase assembling rear chain 2 and produce dead orders and tight purpose probability.

Just assembling the sensitivity and the smooth degree of chain 2 speed changes again inquires into.Outer chain sheet 1 inner side surface was flat design in the past, the inner distance 14 that its corresponding outer chain sheet is 1 is also certain, therefore, when assembling chain 2 is desired speed change, be subjected to the restriction that inner distance 14 to each other can't effectively enlarge, the probability that increment on the sprocket wheel desires to snap in 1 of two outer chain sheet is that phase shape descends, and causes assembling the undesirable of the smooth degree of chain 2 speed changes and sensitivity; The flat design of its outer side surface can increase the friction probability between lamellar body and side sprocket wheel, and then cause the generation of speed change noise when chain 2 is oblique fastening; Obviously the planar of outer chain sheet 1 design in the past, the flexibility of no matter just assembling chain operation, or the smooth degree of speed change all has bad influence.

The purpose of this utility model is to be to provide a kind of to reduce rubbing contact area between combination back lamellar body and inner chain sheet, and then increases the chain flexibility and reduce tight order, the extremely generation of order phenomenon, improves the two-layer outer chain sheet of chain speed change smooth degree.

The purpose of this utility model is realized by following technological scheme.

A kind of two-layer outer chain sheet, it is assembled in the outer side of chain, is formed with the perforation that plugs, locatees for chain rivet in lamellar body two ends, is waists between two perforation; It is characterized in that: lamellar body is to be enlarged at its outer periphery concora crush by the planar lamellar body to form the skin that a thickness dwindles, and the plate body internal layer is then kept original thickness, and the inside and outside interlayer of plate body is formed with straight drop.

The purpose of this utility model can also further be realized by following technological scheme.Aforesaid two-layer outer chain sheet is characterized in that: the skin of described lamellar body is formed with the chamfering of the full periphery of a ring.

Aforesaid two-layer outer chain sheet is characterized in that: the waist place of described lamellar body is formed with the chamfering of upper and lower correspondence.

The utility model compared with the prior art advantage is very obvious.Owing to forming inside and outside bilayer on the lamellar body that it is characterized in that outer chain sheet with straight drop; Internal layer is kept the original thickness of lamellar body, and outer layer ring is located on the full periphery of lamellar body, its thickness attenuation, and make two inner distance that are provided with relatively between outer chain sheet therefore enlarge; Therefore by the formation of aforementioned two-layer lamellar body, can when outer chain sheet is assembled on the chain, reduce the area of rubbing contact between inside and outside chain sheet, and then promote the flexibility of assembling chain operation, and produce dead order or tight purpose probability after reducing its combination; The expansion of outer inner distance on the aforementioned lamellar body also can make the increment of sprocket be easier to slip between two outer chain sheets sensitivity when improving the chain high speed by this and smooth degree.

By above explanation as can be known, the utility model is when making the outer chain sheet of chain, cutting out than original paper on sheet material is less stock, utilizes the concora crush mode to form with internal layer at the inboard full peripheral region of lamellar body again and has the skin that straight drop and thickness dwindle, and makes the lamellar body inner side surface form two-layer; The design of above-mentioned two-layer outer chain sheet, can effectively reduce the rubbing contact area between lamellar body and outer chain sheet, when making it be assembled on the chain because of the reduction of surface friction drag to each other, and has better flexibility, this measure more can reduce chain combination back and produce dead order, tight purpose probability, is beneficial to the manufacturing of chain.

Be elaborated below by most preferred embodiment and accompanying drawing outer chain sheet to chain of the present utility model.

Fig. 1 is a kind of stereogram of outer chain sheet in the past.

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

Fig. 3 is the side view of the utility model preferred embodiment.

Fig. 4 is the plan view of the utility model preferred embodiment.

Fig. 5 is that the utility model preferred embodiment is assembled in the schematic representation on the chain.

Fig. 6 is the schematic top plan view of another preferred embodiment of the utility model.

Fig. 7 is the schematic side view of another preferred embodiment of the utility model.

See also Fig. 3, shown in Figure 4, the outer chain sheet 3 of present embodiment has equally and respectively is formed with a perforation 32 that stretches through, locatees for chain rivet on 31, two ends 31, end of two circular arcs, at 32 waists 33 that then all are the curved arc shape for top, bottom of two perforation; Improvement of the present utility model focuses on: the lamellar body outer side surface is planar, its inner side surface dwindles because of the complete all edge thickness of plate body, and form one inside and outside layer 34,35, the two more forms a straight drop 36 because of the variation of thickness, also promptly, after moulding, internal layer 34 is kept the original thickness of plate body, and outer 35 thinner thickness, its outer side surface and internal layer 34 are in the same plane; And dwindle the intensity that has influence on plate body for fear of outer 35 thickness, the utility model is tailored out a lamellar body little than the standard size shape during fabrication on sheet material, promptly shown in imaginary line among the figure, impose concora crush at the full periphery of this lamellar body, the lamellar body central thickness there is no change behind the concora crush, promptly form so-called internal layer 34, the full periphery of lamellar body is outwards expansion, attenuation then, forms outer 35.

Please cooperate Fig. 3, shown in Figure 5, when present embodiment was assembled on the chain 4, its corresponding outer chain sheet 3 was assembled on the two outstanding ends of chain rivet 41 equally, after the assembling, had internal layer 34 1 sides all towards the center of chain 4; When aforementioned chain 4 when carrying out gear shifting operation, because the full periphery of outer chain sheet 3 forms the skin 35 of a thickness attenuation, therefore, the aforementioned formation that is oppositely arranged skin 35 of mat, can enlarge the inner distance 37 between two outer chain sheets, 3 plate body outer periphery, make the increment of sprocket wheel be easy to slide in 3 of two outer chain sheets; By the demonstration of Fig. 3 as can be known, 34 of the utility model outer 35 and internal layers are because of having a straight drop 36,42 reality of lamellar body and assembling inner chain sheet are corresponding, the position of fitting, only remaining internal layer 34 is to the clitellum shape position of 32 of perforation, it is made comparisons with outer chain sheet 1 in the past, 42 reality of the utility model and inner chain sheet are corresponding, the diminishbb position of fitting area, be outer 35 formed clitellum shape positions, above-mentioned correspondence, the minimizing of fitting area, it can directly reduce the rubbing contact area of 42 of lamellar body and inner chain sheets, and the flexibility in the time of also can improving 4 runnings of assembling chain more can make chain 4 have better flexible torsion, makes speed change more smooth and easy, in addition, can in manufacture process, reduce the dead order and tight order probability of combination rear chain 4 by dwindling also of friction area, make assembling chain 4 more perfect during fabrication.

And in order further to promote the sensitivity of assembling chain speed change, the utility model also can be as shown in Figure 6, encircle the chamfer bevel 351 of establishing the full periphery of a ring at outer chain sheet 3 outer 35,, can promote the sprocket increment and slip in the easness of 3 of two corresponding outer chain sheets by the formation of aforementioned chamfering 351.

In order to reach aforementioned model utility purpose, the utility model also can be as shown in Figure 7, waist 33 upper and lower ends at outer chain sheet 3 inside and outside layers 34,35, form the chamfering 38 of a curved arc respectively according to the sheet body profile, formation by aforementioned chamfering 38, can further enlarge the distance of its two 3 upper and lower end inboards of outer chain sheet that are provided with relatively, the increment that is beneficial to sprocket slips into.

Claims

1, a kind of two-layer outer chain sheet, it is assembled in the outer side of chain, is formed with the perforation that plugs, locatees for chain rivet in lamellar body two ends, is waists between two perforation; It is characterized in that: lamellar body is to be enlarged at its outer periphery concora crush by the planar lamellar body to form the skin that a thickness dwindles, and the plate body internal layer is then kept original thickness, and the inside and outside interlayer of plate body is formed with straight drop.

2, two-layer outer chain sheet according to claim 1 is characterized in that: the skin of described lamellar body is formed with the chamfering of the full periphery of a ring.

3, two-layer outer chain sheet according to claim 1, it is characterized in that: the waist place of described lamellar body is formed with the chamfering of upper and lower correspondence.