CN104110462B - Chain - Google Patents

Abstract

The present invention provides a kind of chain, and it improves chain strength, simultaneously when being in the engagement of sprocket wheel and chain, by avoiding or suppress the phase mutual friction of sprocket and plate part to improve the durability of plate part, solemn silence performance and power transmission performance.Specifically, in chain (100), flexibly 1 connecting piece unit (101) of connector flat board (150) is formed as by connection 1, and 1 pair of connecting pin part (110) is bonded into not separated with 1 pair of plate part (120).On the medial surface (121) of plate part (120), at sprocket wheel side (Ri), retreat face (124) relative to widthwise central face (Pw) in the face shape more distally retreated compared with central crossbar portion (122) in the direction of the width.

Description

Chain

Technical field

The present invention relates to a kind of chain, it is handed in the longitudinal direction for multiple interconnecting pieces and outer connector Mutually and flexibly connect and formed, and be wound around on sprocket wheel.This chain is such as transmission chain bar And used.

Background technology

Generally speaking, the chain being wound around on sprocket wheel is formed as, logical on chain length direction Cross trip to be embedded in the connecting pin of lining and connect multiple interconnecting piece alternately and flexibly and outer be connected with multiple Each interconnecting piece of part and outer connector, interconnecting piece is to be pressed on 1 pair of interconnecting piece flat board 1 pair of lining, outer connector is to be pressed into 1 on 1 pair of outer connector flat board to connecting pin.

It addition, it is known that 1 pair of interconnecting piece flat board of composition interconnecting piece and 1 pair of lining pass through one The chain (referring for example to patent documentation 1) shaped and be integrated.

In the interconnecting piece of existing chain, with on length direction relative to side that is 1 pair counterpart The non-counterpart of 1 couple in opposition side, 1 pair of lining makes chain tension each interior as acting on by pressure Connector flat board.

Thus, in interconnecting piece flat board, surround each lining position with 1 couple of length direction The limit of the non-relative region between opposed area and the non-counterpart of 1 couple of length direction between counterpart Boundary portion centered by boundary, stress is concentrated and is produced tensile stress and (hereinafter referred to as " concentrate stretching to answer Power ").

And, this concentration tensile stress being iteratively produced because of the variation of chain tension reduces interconnecting piece The fatigue strength of flat board, makes the durability of chain reduce.

Then, present applicant has proposed with lower chain, 1 pair of connecting pin part and 1 pair of plate part exist Junction surface in the connecting piece unit integrally engaged and is bendably attached to centered by elastic line 1 pair of connector flat board of described connecting pin part connects the most alternately.

According to the chain of this proposition, owing to 1 pair of connecting pin part is by being positioned in the longitudinal direction relatively The described junction surface in portion and make chain tension act on each plate part as pulling force, therefore can prevent Existing chain produces described concentration tensile stress, it is possible to increase the fatigue strength of plate part, carry The durability of high chain.

Patent documentation 1: the real fair 2-10848 publication of Japan (the 2nd～4 hurdles, all figure)

But, understand with reference to Fig. 5, at the existing connecting pin by rotatably supporting lining 502 504 flexibly connect 1 to interconnecting piece flat board 501 and the chain of 1 pair of outer connector flat board 503 In bar 500, result from the vibration etc. of the chain 500 on width and be likely to be in chain 500 Width center Pc and sprocket wheel sprocket 511 width center Ps occur The state (hereinafter referred to as " width position deviation ") of deviation, by being pivotably supported roller 505 Lining 502 connect 1 to interconnecting piece flat board 501, connect 1 by connecting pin 504 external Connector flat board 503.

When there is the deviation of this width position, it is positioned at 1 pair of interconnecting piece flat board at sprocket 511 Under engagement between 501, as shown in the figure, it is possible to the medial surface 501a of interconnecting piece flat board 501 Interfere with the flank 511a of sprocket 511 and phase mutual friction occurs in this interference region E.

When there is such phase mutual friction, medial surface 501a occurs abrasion to cause interconnecting piece and put down The intensity of plate 501 reduces, and exists and reduces the durability of interconnecting piece flat board 501 and then reduce chain 500 Durability problem, come in contact the problem of noise and because of sprocket 511 and interconnecting piece flat board Friction between 501 and the power loss between sprocket wheel and chain 500 become big, there is chain 500 The problem that power transmission performance reduces.

And, this situation is the most identical in the chain of patent documentation 1.

Summary of the invention

The present invention is carried out to solve the problems referred to above, its object is to provide a kind of chain, its Improve chain strength, simultaneously when being in the engagement of sprocket wheel and chain, by avoiding or suppressing chain The phase mutual friction of the gear teeth and plate part improves the durability of plate part, solemn silence performance and power and passes Pass performance.

The present invention is a kind of chain, the most mutual by multiple interconnecting pieces and outer connector And flexibly connect centered by elastic line and formed, and it is wound around on sprocket wheel, described interior company Fitting is made up of connecting piece unit, and connecting piece unit has: 1 pair of connecting pin part, it is in length side Upward out；And 1 pair of plate part, in width side while linking described 1 pair of connecting pin part Upward out, described plate part is by being bonded to described 1 pair of connecting pin part with described regardless of turning up the soil 1 pair of junction surface of plate part links described 1 pair of connecting pin part, and described outer connector is right by 1 Connector flat board is constituted, and described 1 pair of connector flat board is in the direction of the width across described 1 pair of flat part Dividing and be bendably attached to 1 pair of supporting part of described connecting pin part respectively, described plate part has Have: 1 pair of edge, in the height direction faced by；And medial surface, it is in described 1 in the height direction Between edge, described medial surface has: central crossbar portion, intersects with height center face；And retreat Face, with the described edge of described sprocket wheel side while being positioned at sprocket wheel side relative to described height center face Be connected, described retrogressing face relative to described widthwise central face in the direction of the width with described central crossbar Portion compares the face shape more distally retreated, and thus solves the problems referred to above.

About the present invention, length direction, width and short transverse be respectively chain length direction, Width and short transverse.

It addition, height center face is the elastic line of the 1 pair of connecting pin part comprising connecting piece unit Plane, widthwise central face is the width side while orthogonal with width by 1 pair of plate part Be divided into the plane of two equal portions to interval, lengthwise centers face is by the 1 of connecting piece unit pair of flexural center The plane that the length direction interval of line is orthogonal to the longitudinal direction while being divided into two equal portions.

It addition, refer to when being in engagement respectively enter, from sprocket, the 1st, formed by chain 2 engagement space states to exiting i.e. sprocket when sprocket is positioned at each engagement space and The state of chain.

According to the chain of the present invention involved by technical scheme 1, owing to interconnecting piece is by connecting piece unit Constituting, connecting piece unit has: 1 pair of connecting pin part, and it is upward out in chain length side；And 1 pair of plate part, link 1 to connecting pin part while leave on chain width, 1 Being bonded into not separated with 1 pair of plate part at 1 pair of junction surface to connecting pin part, outer connector is by 1 Connector flat board is constituted, therefore, it is possible to constituted interconnecting piece with the connecting piece unit of simple in construction, and And, it is possible to increase the intensity of interconnecting piece, thus improve the durability of chain.

It addition, when assembling chain, be integrated for 1 pair of connecting pin part with 1 pair of plate part Single part i.e. connecting piece unit, owing to flexibly connecting 1 to connector flat board, therefore Compared with 1 pair of connecting pin being pressed in the existing chain of 1 pair of outer connector flat board, the assembling of chain Tend to simplifying thus assembleability raising, it is possible to reduce cost.

It is additionally, since and is being connected with plate part has connector flat board in the connecting pin part of one, because of This is when being attached connecting piece unit and 1 pair of connector flat board, and needs connecting pin and lining Existing chain is compared number of components and is reduced, and also is able to the most in this reduce cost.

Be additionally, since plate part to have: 1 pair of edge, in the height direction faced by；And medial surface, It is in the height direction between 1 pair of edge and towards the 1st engagement space, medial surface has: center Cross part, intersects with height center face；And retrogressing face, it is being positioned at sprocket wheel side relative to height center face While be connected with the edge of sprocket wheel side, retreat face relative to widthwise central face in the direction of the width with Central crossbar portion compares the face shape more distally retreated, and is therefore being in the 1st engagement space inner sprocket During with the engagement of chain, even if there is width position deviation between sprocket and chain Chain is relatively close in the direction of the width relative to sprocket, and the medial surface of plate part is at the face of retrogressing By the width distance from widthwise central face become compared with central crossbar portion big in the way of in width side Upwards retreat, so can avoid or suppress sprocket and medial surface phase mutual friction (below by this situation letter Singly it is referred to as " avoiding phase mutual friction ").

Thus, due to the abrasion of plate part, contact noise and the sprocket of this phase mutual friction of cause Friction with plate part is all lowered, and the intensity of the plate part therefore caused by suppression abrasion is dropped It is low such that it is able to improve the durability of plate part, and then the durability of chain can be improved, it is possible to Improve the solemnly silent performance of chain by reducing contact noise, be additionally, since the reduction of friction and be in Power loss during engagement reduces, it is possible to increase the power transmission performance of chain.

Further, since avoid the structure conduct of the sprocket being in engagement and medial surface phase mutual friction Retrogressing face and be arranged on medial surface, therefore can be used for avoiding this mutual by reduction on sprocket The tapering degree of tooth crest of friction, forming range increase the facewidth of tooth crest, it is possible to improve The intensity of sprocket.

According to the chain of the present invention involved by technical scheme 2, owing to being formed the most alternately Having the 1st engagement space to engage space with the 2nd, the 1 of the 1st engagement space connected piece unit is to connection Pin part and 1 pair of plate part institute around, the 2nd engagement space is by the most adjacent connection Part unit connecting pin part each other and the 1 pair of connector flat board institute around, multiple sprockets of sprocket wheel can Sequentially enter the 1st engagement space and the 2nd engagement space the most one by one, therefore at chain and sprocket wheel During engagement, rotated by sprocket wheel, thus sprocket enter the 1st, the 2nd engagement space, chain with When carrying out power transmission between sprocket wheel, being delivered on chain with the power between sprocket is by being connected Part unit is carried out, and connecting pin part and plate part are bonded into not separated, will not be because of these connecting pins There is gap and produce relative movement between part and plate part, therefore can prevent due to described relatively Move and produce noise, it is possible to increase the noise-proof performance of chain.

It addition, 1 pair of connecting pin part has: 1 pair of counterpart, be positioned in the longitudinal direction relative to Side；And 1 to non-counterpart, it is positioned at side contrary with 1 pair of counterpart in the longitudinal direction, even Pin part makes chain tension act on flat board by laying respectively at 1 pair of junction surface of 1 pair of counterpart Part, by 1 pair of connector flat board in the direction of the width across 1 pair of plate part in the direction of the width Leave and be flexibly connected to connecting pin part, thus 1 couple that connecting pin part is in the longitudinal direction Region between counterpart is i.e. come plate part as pulling force by junction surface in opposed area Apply chain tension, therefore, occur the stretching at the position round connecting pin part of plate part to answer Power distributes life in bonding part, owing to can prevent non-with 1 couple in the longitudinal direction with opposed area Boundary portion centered by region between the counterpart i.e. border of non-relative region produces stress and concentrates, because of The fatigue strength of the plate part of this connecting piece unit improves such that it is able to improve the resistance to of connecting piece unit Property for a long time, and then the durability of chain can be improved.

According to the chain of the present invention involved by technical scheme 3, due to the plate part in sprocket wheel side Plate height, less than the plate height of the connector flat board in sprocket wheel side, is therefore retreated at plate part The plate height of the edge defined that face is connected is less compared with the plate height of connector flat board, accordingly Avoid the phase mutual friction of sprocket and medial surface, therefore, it is possible to reduce the mill of plate part further Damage, contact noise and sprocket and the friction of plate part.

According to the chain of the present invention involved by technical scheme 4, owing to retreating the width section in face Shape is convex shape towards widthwise central face in the direction of the width, and, along with in the height direction from Height center face, near the edge of sprocket wheel side, increases continuously in the width distance from widthwise central face Arc-shaped, therefore when sprocket is guided by the face of retrogressing and moves in the direction of the width, relative to The ratio of the width amount of movement of short transverse amount of movement, the contact site of the sprocket on retrogressing face Position then becomes the biggest the closer to edge.

Thus, engage the sprocket in space described contact site on retrogressing face more owing to entering the 1st More it is corrected in early days near the deviation of edge then width position, therefore promotes to avoid at follow-up chain The gear teeth enter the phase mutual friction with medial surface during the 1st follow-up engagement space, it is possible to reduce flat part The abrasion, contact noise and the sprocket that divide and the friction of plate part.

According to the chain of the present invention involved by technical scheme 5, owing to medial surface has flat shape Central authorities side, it is connected with retrogressing face while comprising central crossbar portion in the height direction, in Slab-thickness on side, centre is more than the slab-thickness on retrogressing face, the most not only on central authorities side Slab-thickness bigger compared with the slab-thickness on retrogressing face, and planar shape, and, Retreat and face toward the curve form that widthwise central face is convex shape, so with the face of retrogressing in the height direction Comparing during the clinoplain shape tilted, the slab-thickness of the part with retrogressing face becomes big, therefore, it is possible to Improve the intensity of plate part, it is possible to increase the durability of plate part.

According to the chain of the present invention involved by technical scheme 6, owing to retreating face along with at length direction On increase continuously in the width distance from widthwise central face from lengthwise centers face near connecting pin part The curve form added, therefore at sprocket in the longitudinal direction to enter near the position of connecting pin part During the 1st engagement space, retrogressing face is the most more proximate to the position of connecting pin part the most Retreat significantly, so promoting to avoid the sprocket after just initially entering the 1st engagement space and retrogressing The phase mutual friction in face, it is possible to reduce the abrasion of plate part, contact noise and sprocket and flat part The friction divided.

Accompanying drawing explanation

Fig. 1 represents embodiments of the invention, is the exploded partial perspective view of chain.

The figure wanting portion when Fig. 2 is to observe the chain of Fig. 1 from sprocket wheel side in the height direction, a part It it is the 2-2 line sectional view of Fig. 3.

Fig. 3 is the figure wanting portion of the state representing that the chain roll of Fig. 1 is hung on sprocket wheel, is comparable to Fig. 2 The sectional view of 3-3 line.

Fig. 4 is the 4-4 line sectional view of Fig. 3

Fig. 5 represents prior art, is comparable to the sectional view of Fig. 4

Description of reference numerals

100-chain；101-connecting piece unit；110-connecting pin part；111-counterpart；112-is non- Counterpart；120-plate part；121-medial surface；122-central crossbar portion；123-inner central side Face；124-retreats face；129-edge；140-junction surface；141-engages boundary portion；150-connector Flat board；A-boundary portion；B-border；H1-sells height；H2, H5-plate height；H4-jointing altitude； Ph-height center face；Pw-widthwise central face；Pn-lengthwise centers face；Pc, Ps-width center Position；Ri-sprocket wheel side；Ro-sprocket wheel opposition side；S1, S2-engage space；T3, t4-slab-thickness.

Detailed description of the invention

The chain of the present invention is every 1 company of 1 pair of connector flat board of multiple connecting piece unit and many groups Fitting unit and the 1 pair of connector flat board mutual in the longitudinal direction and centered by elastic line bendable Connecting bently and formed, and be wound around on sprocket wheel, connecting piece unit is by 1 left in the longitudinal direction To connecting pin part with link 1 to connecting pin part while 1 couple of leaving in the direction of the width put down Plate part is constituted, and plate part by being bonded to 1 pair of connecting pin part and plate part regardless of turning up the soil 1 pair of junction surface link 1 connecting pin part, 1 pair of connecting pin part had: 1 pair of counterpart, Be positioned in the longitudinal direction relative to side；And 1 to non-counterpart, it is positioned in the longitudinal direction with 1 The side contrary to counterpart, connecting pin part is by laying respectively at 1 pair of junction surface of 1 pair of counterpart And make chain tension act on plate part, the 1 pair of connector flat board in the direction of the width across 1 to flat Plate part and be bendably attached to 1 pair of supporting part of connecting pin part respectively, hand in the longitudinal direction It is formed with the 1st engagement space mutually and engages space, the 1 of the 1st engagement space connected piece unit with the 2nd To connecting pin part and 1 pair of plate part institute around, the 2nd engagement space is by the most adjacent Connecting piece unit connecting pin part each other and the 1 pair of connector flat board institute around, multiple chains of sprocket wheel The gear teeth can sequentially enter the 1st engagement space and the 2nd engagement space the most one by one, and plate part has Have: 1 pair of edge, in the height direction faced by；And medial surface, in the height direction 1 pair of edge Between towards the 1st engagement space, medial surface has: central crossbar portion, intersects with height center face； And retrogressing face, while being positioned at sprocket wheel side relative to height center face, the edge with sprocket wheel side is connected, Retrogressing face relative to widthwise central face in the direction of the width compared with central crossbar portion more distally after The face shape moved back, as long as the counterpart that the 1 pair of connecting pin part is in the longitudinal direction is by making chain tension The 1 pair of plate part linking this 1 pair of connecting pin part is acted on as pulling force, thus because of flat part Point fatigue strength raising and durability is improved, be simultaneously in the engagement shape of sprocket wheel and chain During state, by avoiding or suppress the phase mutual friction of sprocket and plate part to improve the resistance to of plate part Property, solemn silence performance and power transmission performance for a long time, then its concrete form can be arbitrary.

Such as, in the connecting piece unit of the chain of the present invention, engage connecting pin part and plate part Joint method can be integrally formed, heat bonding (or welding) and bonding any one.

The formation material of the connecting piece unit of the chain of the present invention can also be synthetic resin (hereinafter referred to as " resin "), metal or resin and metal be (such as, by resin and the metal shape being inserted in this resin Situation about becoming).

The chain of the present invention is the chain producing chain tension when motion, such as transmission chain bar (such as timing chain) or carrying chain and use, such as vehicle can also be used in as machinery Power set (including electromotor), handling machinery and industrial machinery in any one.

Embodiment

Hereinafter, with reference to Fig. 1～Fig. 4, embodiments of the invention are illustrated.

Understand with reference to Fig. 1～Fig. 3, in an embodiment of the present invention, as the chain of transmission chain bar 100 is non junction chain, and it possesses: constitute multiple connecting piece units 101 of interconnecting piece；And structure Become 1 pair of connector flat board 150 of many groups of outer connector, all of connecting piece unit 101 and all Every 1 connecting piece unit 101 of 1 pair of connector flat board 150 of group and 1 pair of connector flat board 150 By connecting pin part 110(of connecting piece unit 101 hereinafter referred to as " pin part 110 ") in length Alternately and flexibly connect centered by the elastic line C of pin part 110 on direction, thus shape Become non junction chain.

Having in multiple sprocket wheel 10(Fig. 3 that chain 100 and this chain 100 are wrapping with shows wherein The part of 1 sprocket wheel 10) chain-wheel mechanism and to the chain 100 moved in the longitudinal direction The chain guide for use (not shown) carrying out guiding constitutes together and is wrapping with actuating device.

And, in connecting piece unit 101, width is the direction being parallel to elastic line C, Length direction is for being parallel to height center face Ph(with reference to Fig. 3 while orthogonal with width) Direction.

It addition, short transverse is the direction orthogonal with height center face Ph.

Connecting piece unit 101 is single with what 1 pair of plate part 120 was constituted by 1 pair of pin part 110 Parts, 1 pair of pin part 110 leaves in the longitudinal direction, and 1 pair of plate part 120 is linking 1 respectively Leave in the direction of the width while pin part 110.

1 pair of pin part 110 and each plate part 120 are by the quilt as the integrally formed of joint method Integration, forms connecting piece unit 101.

Thus, connecting piece unit 101 is the single formed products being made up of resin.

And, connecting piece unit 101 be respectively using height center face Ph and widthwise central face Pw as The component that the face of the plane of symmetry is symmetrical.

Thus, 1 pair of pin part 110 is in same shape, and 1 pair of plate part 120 is in same shape.

It is bonded to 1 pair of pin part 110 and each plate part 120 regardless of turning up the soil in pair of engaging portion 140, Each plate part 120 links 1 to pin part 110 by 1 pair of junction surface 140.

" regardless of joint of turning up the soil " refers to the combination of the following meaning, and the chain 100 when motion acts on Under the state having chain tension, 1 pair of pin part 110 is with each plate part 120 at junction surface 140 not Can separate, and act on the pulling force on pin part 110 and plate part 120 by junction surface 140 Transmit between two parts 110,120.

At connecting piece unit 101 in appearance, junction surface 140 is by by mutually regardless of joint of turning up the soil The frame-shaped that pin part 110 is formed with plate part 120 engage the region that boundary portion 141 is surrounded.

And, by integrally formed and formed in the present embodiment of connecting piece unit 101, junction surface 140 is to include that the aforementioned areas engaging boundary portion 141 is overall.

Further, as other examples, junction surface 140 can also be a part for aforementioned areas.

Pin part 110 is the cylindrical component with outer peripheral face 118, is cylindrical element at this.

Pin part 110 has: engaging piece 113, width is in 1 pair of plate part 120 or Between 1 pair of connector flat board 150；And 1 pair of protuberance 114, relative to 1 to flat on width Plate part 120 is prominent to engaging piece 113 opposition side.

Engaging piece 113 is engageable to multiple sprocket 11(reference Fig. 3 that sprocket wheel 10 is had), And directly transmit power between sprocket 11.

Protuberance 114 has: supporting part 115, in the direction of the width near plate part 120；And Pin end 116, has pin end face 117.

At supporting part 115, connector flat board 150 is supported for can be centered by elastic line C It is curved.

In connecting piece unit 101,1 pair of pin part 110 has: 1 pair of counterpart 111, is located at On length direction relative to side；And 1 to non-counterpart 112, be positioned in the longitudinal direction with this phase The side contrary to portion 111.

Counterpart 111 and non-counterpart 112 are the optional positions of the width at pin part 110 On lengthwise section pin part 110 by straight line L(with reference to Fig. 3) 2 portions when being divided into two parts Point, straight line L by regulation sprocket wheel side Ri and sprocket wheel opposition side Ro pin height H1(i.e., outer peripheral face 118 in the height direction from the maximum of distance of height center face Ph) 2 position 118a, 118b。

In the present embodiment, two pin height H1 are equal, and straight line L is by elastic line C and to put down Row is in the straight line of short transverse.

Pin part 110 has identical external diameter in the total length of width.

Here, lengthwise section is the section in the plane orthogonal with width.

It addition, sprocket wheel side Ri be relative to height center face Ph and the rotation centerline of sprocket wheel 10 (not Diagram) at side, sprocket wheel opposition side Ro be relative to height center face Ph with sprocket wheel side The side that Ri is contrary.

In 1 pair of pin part 110 of each connecting piece unit 101,1 pair of counterpart 111 is in length side Upwards regulation 1 is to the region between counterpart 111, i.e. specifies 1 pair of counterpart 111 as growing The region i.e. opposed area on the border on degree direction.

It addition, in 1 pair of pin part 110 that the most adjacent connecting piece unit 101 is each other, 1 pair of non-counterpart 112 specifies the region between the non-counterpart of this 1 couple 112 in the longitudinal direction, i.e. Specify using 1 to non-counterpart 112 as the region i.e. non-relative region on border in the longitudinal direction.

1 pair of pin part 110 and plate part 120 are only in the middle of counterpart 111 and non-counterpart 112 Counterpart 111 regardless of joint of turning up the soil.

Thus, in each pin part 110, junction surface 140 is only at the width of counterpart 111 In the range of plate part 120 circumference counterpart 111 at least some of on exist, in this reality Executing in example, there is (or being positioned at) in the counterpart 111 in circumference on the whole, and in non-counterpart 112 There is not (or not being positioned at).

At sprocket wheel side Ri and sprocket wheel opposition side Ro, the formation model at junction surface 140 in the height direction Enclose i.e. jointing altitude H4 and be set to below the maximum of pin height H1, here, with pin height H1 Maximum equal.

Thus, owing to the engaging zones at junction surface 140 becomes big, therefore produce at plate part 120 Tensile stress diminish, thus the durability of connecting piece unit 101 improve.

And, radial direction and circumference are the radial direction centered by elastic line C and circumference respectively.

In connecting piece unit 101, the 1 pair of plate part 120 is positioned only at the 1 of length direction to phase To between portion 111 (i.e. in opposed area).

That is, plate part 120 entirety is positioned in the range of opposed area in the longitudinal direction, with this The length that scope is equal extends in the longitudinal direction.

And, there is not plate part 120 continuously and from outward in non-counterpart 112 and non-relative region The part that side face 118 is prominent to length direction and radial outside.

Thus, under engagement, owing to engaging space S 2 middle sprocket tooth 11 not the described later 2nd Can interfere with plate part 120, therefore, it is possible to reduce power loss when being in engagement.

It addition, there is not plate part 120 at non-relative region, correspondingly due to plate part 120 Chain length direction is miniaturized, therefore, it is possible to make plate part 120 lightweight, and then can Make chain 100 lightweight.

Understanding with reference to Fig. 1～Fig. 4, each plate part 120 has: 1 pair of edge 129, in height side Upwardly facing；Medial surface 121, in the height direction between 1 pair of edge 129, in width side 1st engagement space S 1 the most described later；And lateral surface 126, it is located at width and inner side The side that face 121 is contrary.

In the present embodiment, each medial surface 121 and each lateral surface 126 are relative to height center face Ph Symmetrical in face.

Medial surface 121 has: inner central side 123(hereinafter referred to as " central authorities side 123 "), Comprise the intersection part i.e. central crossbar portion 122 intersected with height center face Ph；And 1 to retreat face 124, while being connected with central side 123, lay respectively at sprocket wheel side relative to height center face Ph Ri and sprocket wheel opposition side Ro.

Plate part 120 has: central part 133, has central side 123；And 1 pair of backs 134, there is while being connected with central part 133 retrogressing face 124.

Central part 133 has a part i.e. outside central authorities side of central side 123 and lateral surface 126 127。

Two backs 134 as the both ends of plate part 120 in the height direction have respectively Have: retreat face 124；The non-central authorities in outside side 128, the outside central authorities side 127 of lateral surface 126 Part in addition；And edge 129, it is connected with retreating the non-central authorities in face 124 and outside side 128.

Thus, retreat face 124 respectively in sprocket wheel side Ri and sprocket wheel opposition side Ro and central authorities side 123 And edge 129 is connected.

Retrogressing face 124 relative to widthwise central face Pw in the direction of the width with central crossbar portion 122 And central authorities side 123 compare the face shape more distally retreated.

Specifically, along with in the height direction from height center face Ph(or central crossbar portion 122) Near edge 129, retreat face 124 from the width distance of widthwise central face Pw and become big.

The width section configuration (with reference to Fig. 4) in retrogressing face 124 is as follows, at sprocket wheel side Ri and chain Wheel opposition side Ro arbitrary lengthwise location, in the direction of the width towards widthwise central face Pw in Convex shape, and along with in the height direction from central authorities side 123 near edge 129 in from width The arc-shaped of the convex shape that the width distance of heart face Pw increases continuously.

Therefore, the curve form that face 124 is convex shape towards widthwise central face Pw is retreated.

Here, width section is the section in plane orthogonal to the longitudinal direction.

Arc-shaped refers to multiple circular arc institutes of the single circular arc by 1 radius of curvature or different curvature radius The compound circular arc constituted.

It addition, retreat face 124 as follows, along with in the longitudinal direction from lengthwise centers face Pn near pin Part 110, towards in width in the way of the width distance from widthwise central face Pw increases continuously Heart face Pw is the curve form of convex shape, and in face that lengthwise centers face Pn is the plane of symmetry is symmetrical Shape.

And, the flat section configuration retreating face 124 is as follows, in arbitrary short transverse position, along with From lengthwise centers face Pn in the longitudinal direction near pin part 110 in the width from widthwise central face Pw The arc-shaped of the convex shape that direction distance continuous print increases.

Lengthwise centers face Pn on retrogressing face 124 is also and intersects closest to position in the direction of the width Plane.

And, flat section is the section in the plane orthogonal with short transverse.

Central authorities side 123 is in being parallel to lateral surface 126 with retrogressing face 124 while being connected swimmingly And the flat shape orthogonal with width.

Thus, the width section configuration of central authorities side 123 and lateral surface 126 is as follows, with rear The tangent line moving back this retrogressing face 124 of the boundary in face 124 and the straight line extended in parallel along short transverse Shape.

The short transverse width W3(of central authorities side 123 is with reference to Fig. 3) as follows, more than each retrogressing face 124 Short transverse width W4, more than 2 times of this short transverse width W4, pin height more than H1.

Understanding with reference to Fig. 1, Fig. 2, the slab-thickness t4(of backs 134 is with reference to Fig. 4) arbitrarily Height and position in the longitudinal direction along with continuous towards lengthwise centers face Pn from pin part 110 Increase.

Thus, slab-thickness t4 is close compared with the region near pin part 110 in the longitudinal direction The region of lengthwise centers face Pn is bigger.

On the other hand, at slab-thickness t3(reference Fig. 4 of central part 133) as follows, in length side To and being substantially the same on the whole of width, be also greater than slab-thickness t4 on the whole at it.

Understanding with reference to Fig. 1～Fig. 4, each edge 129 is end face in the height direction at this, it is stipulated that Plate height H2(of plate part 120 is with reference to Fig. 3).

That is, plate height H2 be the edge 129 of plate part 120 from height center face Ph at height Distance on degree direction.

1 pair of edge 129 is and to lay respectively at pin portion on the whole at it in its total length of length direction Plane on the 1 couple of incisal plane P1 being parallel to height center face of the outer peripheral face 118 of points 110.

Thus, due to plate part 120 in the both direction of short transverse unlike pin part 110 more Prominent, therefore, it is possible to make flat part 120 miniaturization in the height direction, it is possible to carry out lightweight.

1 pair of connector flat board 150 of same shape leaves in the direction of the width and is bendably attached to Each pin part 110.

1 pair of connector flat board 150 configures across 1 pair of plate part 120 in the direction of the width.

By on the connector flat board 150 formed as the metal forming material, it is provided with in length 1 pair of pin-and-hole 155 that side is upward out.

By being inserted into supporting part 115 in pin-and-hole 155, thus connector flat board 150 is embedding (i.e. in trip Matched in clearance) under the state of this supporting part 115, it is bendably attached to pin part 110.

Understanding with reference to Fig. 3, plate height H2 of plate part 120 is pin below height H1 and is less than Plate height H5 of connector flat board 150.

And, plate height H5 of connector flat board 150 is the edge 159 of connector flat board 150 Short transverse distance from height center face Ph.

Specifically, plate height H2 of plate part 120 the 1st engagement sky in the longitudinal direction Between S1 plate part 120 on the whole or in the longitudinal direction total length in identical value, this In embodiment equal with pin height H1.

It addition, as it is shown on figure 3, plate height H2 is less than in the non-relative district of connector flat board 150 The part in territory and two plate part 120 nonoverlapping portions when observing from the width direction in opposed area Plate height H5 divided.

Understand with reference to Fig. 2, Fig. 3, only formed by 1 pair of counterpart 111 at each connecting piece unit 101 And 1 pair of plate part 120 around and sprocket 11 can retreat (can enter into and exit from) the 1st Engagement space S 1.

It addition, be formed only non-by the most adjacent connecting piece unit 101 1 couple each other Counterpart 112 and 1 pair of connector flat board 150 around and the 2nd engagement that can retreat of sprocket 11 Space S 2.

In chain 100, respectively for the 1st, the 2nd engagement sky of mutual in the longitudinal direction configuration Between S1, S2, when in the rotation because of sprocket wheel 10, chain 100 is engaged in sprocket wheel 10, sprocket 11 Sequentially enter one by one, when chain 100 releases engagement from sprocket wheel 10, sprocket 11 1 Individual exit successively.

Understanding with reference to Fig. 4, sprocket 11 has: outside base portion 12, with the discshaped body of sprocket wheel 10 Perimembranous is connected；And tooth crest 13.

When the rotation centerline of sprocket wheel 10 is parallel with the width of chain 100, base portion 1 couple of flank 12a of 12 is in the flat shape parallel with widthwise central face Pw, the 1 of tooth crest 13 It is the tooth crest 13 face shape in the direction of the width in tapered to flank 13a, is curved surface at this Shape.

Thus, facewidth W13(of tooth crest 13 i.e., width in the direction of the width) less than base portion Facewidth W12 of 12.

Understanding with reference to Fig. 1, Fig. 2, Fig. 4, chain 100 possesses the multiple lids 103 as anti-delinking part, It is used for preventing because abutting with connector flat board 150 and connector flat board 150 comes off from pin part 110.

For being respectively supported at 1 pair of connector flat board 150 of two supporting parts 115, lid 103 is arranged 1 to pin end 116.

Lid 103 covers pin end face 117, is fixed on pin end by the press-in as fixing means 116。

Understand with reference to Fig. 1, when assembling chain 100, first by the pin part of connecting piece unit 101 Each supporting part 115 of 110 is inserted in pin-and-hole 155, and the trip of each connector flat board 150 is embedded in supporting part 115。

It follows that lid 103 to be arranged on each pin end 116, connector flat board 150 is prevented De-process.

Hereinafter, assembly and connection part unit 101 and 1 pair of connector flat board through same assembly process The 150 mutual in the longitudinal direction chains 100 connected.

When producing chain tension on chain 100, pin part 110 by each junction surface 140 in phase Region make chain tension act on plate part 120.

Now, tensile stress is produced at junction surface 140.

On the other hand, pin part 110 makes chain tension as the company of acting on by pressure in opposed area Fitting flat board 150.

It follows that the effect of the embodiment constituted as previously mentioned is illustrated.

Chain 100 passes through 1 connecting piece unit 101 and 1 pair of connector flat board 150 at length direction On alternately and flexibly connect and formed, and be wound around on the multiple sprocket wheels 10 constituting chain-wheel mechanism, It is possible to transmit power between multiple sprocket wheels 10.

Connecting piece unit 101 is made up of with 1 pair of plate part 120 1 pair of pin part 110, flat part Points 120 link 1 to pin part 110 at 1 pair of junction surface 140, and pin part 110 is by being positioned at relatively The junction surface 140 in portion 111 makes chain tension act on plate part 120 as pulling force, and 1 to even Fitting flat board 150 is bendably attached to pin across described 1 pair of plate part 120 in the direction of the width Part 110.

Thus, make chain tension as draw in opposed area by junction surface 140 due to pin part 110 Power and act on plate part 120, therefore result from round pin part 110 at plate part 120 At junction surface 140, dispersion produces the tensile stress at position, prevents with opposed area and non-relative region Boundary B (with reference to Fig. 4) centered by boundary portion A(with reference to Fig. 4) produce stress and concentrate.

Thus, the fatigue strength of the plate part 120 of connecting piece unit 101 improves such that it is able to carry The durability of high connecting piece unit 101, and then the durability of chain 100 can be improved.

It addition, when assembling chain 100, for 1 pair of pin part 110 and 1 pair of plate part 120 In the single part i.e. connecting piece unit 101 of integration, owing to flexibly connecting 1, connector is put down Plate 150, is therefore pressed into the existing chain phase in 1 pair of outer connector flat board with 1 pair of connecting pin Ratio, the assembling of chain 100 becomes simplified as thus assembleability improves, it is possible to reduce cost.

It is additionally, since and is being connected with plate part 120 has connector flat board in the pin part 110 of one 150, therefore when connecting piece unit 101 and 1 pair of connector flat board 150 are attached, with need The existing chain wanting connecting pin and lining is compared number of components and is reduced, and also is able in this reduce Cost.

It is formed with the 1st engagement space S 1 the most alternately and engages space S 2 with the 2nd, the 1st 1 pair of counterpart 111 of engagement space S 1 connected piece unit 101 and 1 pair of plate part 120 institute Around, the 2nd engagement space S 2 is by the most adjacent connecting piece unit 101 each other non- Counterpart 112 and the 1 pair of connector flat board 150 institute around, multiple sprockets 11 of sprocket wheel 10 can divide Sequentially enter the 1st, the 2nd engagement space S 1, S2 the most one by one.

Thus, when chain 100 engages with sprocket wheel 10, rotated by sprocket wheel 10, thus sprocket 11 enter the 1st, the 2nd engagement space S 1, S2, carry out power between sprocket wheel 10 and chain 100 During transmission, it is by connector list owing to the power between sprocket 11 is delivered on chain 100 Unit 101 is carried out, and pin part 110 and plate part 120 are bonded into not separated, about pin part 110 And plate part 120, will not because there is gap between these pin part 110 and plate parts 120 and Produce relative movement, therefore can prevent from producing noise due to described relative movement, it is possible to increase chain The solemnly silent performance of 100.

Plate part 120 is only positioned between 1 pair of counterpart 111 in the longitudinal direction, junction surface 140 1 pair of counterpart 111 it is only positioned in pin part 110.

Thus, outside the 1 pair of counterpart 111 being not present on length direction due to plate part 120 The region of side i.e. non-relative region or the 2nd engagement space S 2, even if therefore pin part 110 is opened because of chain Power and produce bending, it is also possible to avoid occurring when plate part 120 is present in non-relative region The contacting, so contact noise, abrasion and frictional resistance subtract of plate part 120 and sprocket 11 Little, it is possible to increase the solemnly silent performance of chain 100, durability and power transmission performance.

And, there is not plate part 120 at non-relative region, correspondingly due to plate part 120 It is miniaturized in the longitudinal direction, therefore, it is possible to make plate part 120 lightweight, and then chain can be made Bar 100 lightweight.

Due on the medial surface 121 of plate part 120, at sprocket wheel side Ri, to retreat face 124 relative In widthwise central face Pw in more distally retreating compared with central crossbar portion 122 in the direction of the width Face shape, therefore when being in the engagement of the 1st engagement space S 1 inner sprocket 10 and chain 100, Even if there is the width position deviation i.e. width of chain 100 between sprocket 11 and chain 100 The width center Ps(of degree center, direction Pc and sprocket 511 is with reference to Fig. 4) Occur on width to deviate and chain 100 is relatively close in the direction of the width relative to sprocket 11, The medial surface 121 of plate part 120 is retreating at face 124 with the width side from widthwise central face Pw Become big mode compared with central crossbar portion 122 to distance to retreat in the direction of the width, so can avoid Sprocket 11 and medial surface 121 phase mutual friction.

Thus, due to the abrasion of plate part 120, contact noise and the chain of this phase mutual friction of cause The gear teeth 11 are all lowered with the friction of plate part 120, the flat board therefore caused by suppression abrasion The intensity of part 120 reduces such that it is able to improves the durability of plate part 120, and then can carry The durability of high chain 100, it is possible to improve the solemnly silent performance of chain 100 by reducing contact noise, Power loss when being additionally, since the reduction of friction and be in engagement reduces, it is possible to increase chain The power transmission performance of 100.

Further, since avoid the sprocket 11 being in engagement and medial surface 121 phase mutual friction Structure is arranged on medial surface 121 as retrogressing face 124, therefore can lead on sprocket 11 Cross reduction for avoiding tapering (or narrow width) degree of tooth crest 13 of this phase mutual friction, formation Scope increases facewidth W13 of tooth crest 13, it is possible to improve the intensity of sprocket 11.

Owing to plate height H2 of the plate part 120 at sprocket wheel side Ri is less than sprocket wheel side Ri's Plate height H5 of connector flat board 150, is therefore connected by the face of retrogressing 124 at plate part 120 Plate height H2 of edge 129 defined is less compared with plate height H5 of connector flat board 150, Correspondingly avoid the phase mutual friction of sprocket 11 and medial surface 121, therefore, it is possible to reduce flat further The abrasion of plate part 120, contact noise and sprocket 11 and the friction of plate part 120.

Owing to retreating the width section configuration in face 124 in the direction of the width towards widthwise central face Pw is convex shape, and, along with in the height direction from height center face Ph near sprocket wheel side Ri Edge 129, the arc-shaped increased continuously in the width distance from widthwise central face Pw.

Thus, due to along with in the height direction from central authorities side 123 near the edge of sprocket wheel side Ri 129, retreat the width section configuration in face 124 in the width distance from widthwise central face Pw The arc-shaped increased continuously, is therefore guided and at width by retrogressing face 124 at sprocket 11 Upper mobile time, relative to the ratio of the width amount of movement of short transverse amount of movement, retreating face 124 On the contact site of sprocket 11 then become the biggest the closer to edge 129.

Thus, owing to entering the sprocket 11 of the 1st engagement space S 1 described in retreat on face 124 Contact site is more corrected in early days the closer to the deviation of edge 129 then width position, therefore promotes Avoid when follow-up sprocket 11 enters follow-up 1st engagement space S 1 with medial surface 121 Phase mutual friction, it is possible to reduce the abrasion of plate part 120, contact noise and sprocket 11 with flat The friction of plate part 120.

Medial surface 121 has the central side 123 of flat shape, and it is comprising central crossbar portion 122 While in the height direction with retreat face 124 and be connected, the slab-thickness t3 on central side 123 More than at the slab-thickness t4 retreated on face 124.

Thus, owing to not only having slab-thickness t3 and the tool of the central part 133 of central side 123 The slab-thickness t4 having the backs 134 in retrogressing face 124 compares bigger, and planar shape, And, retreating face 124 is the curve form of convex shape towards widthwise central face Pw, thus with retrogressing Compare during the clinoplain shape that face 124 tilts in the height direction, there is the part in retrogressing face 124 Slab-thickness t4 becomes big, therefore, it is possible to improve the intensity of plate part 120, it is possible to increase flat part Divide the durability of 120.

Due to retreat face 124 along with in the longitudinal direction from lengthwise centers face Pn near pin part 110 The curve form increased continuously in the width distance from widthwise central face Pw, therefore at sprocket 11 in the longitudinal direction, when space S 1 is engaged in the position of pin part 110 entrance the 1st, to retreat Face 124 is the most more proximate to the position of pin part 110 and retreats the most significantly, so Promote the phase avoiding the sprocket 11 after just initially entering the 1st engagement space S 1 with retrogressing face 124 Mutual friction, it is possible to reduce the abrasion of plate part 120, contact noise and sprocket 11 and flat board The friction of part 120.

Hereinafter, the embodiment to a part of structure of change previous embodiment, the structure about change is entered Row explanation.

Retrogressing face can also be single inclined plane shape or different inclination in addition to curve form Multiple inclined plane shapes.

The shape of plate part 120 or medial surface can also be in faced by non-relative to height center face Ph Claim, can also be different from sprocket wheel opposition side Ro at sprocket wheel side Ri.

The short transverse width W4 in retrogressing face 124 can also be the short transverse width of central authorities side 123 Degree more than W3.

The plate part 120 that connecting piece unit 101 has can also be more than 3.

Claims (6)

1. a chain, mutual in the longitudinal direction by multiple interconnecting pieces and outer connector and with curved Flexibly connect centered by bent centrage and formed, and be wound around on sprocket wheel, it is characterized by,

Described interconnecting piece is made up of connecting piece unit, and connecting piece unit has: 1 pair of connecting pin part, It leaves in the longitudinal direction；And 1 pair of plate part, linking the same of described 1 pair of connecting pin part Time leave in the direction of the width,

Described plate part by being bonded to described 1 pair of connecting pin part and described flat part regardless of turning up the soil The 1 pair of junction surface divided links described 1 pair of connecting pin part,

Described outer connector is made up of 1 pair of connector flat board,

Described 1 pair of connector flat board difference bendable across described 1 pair of plate part in the direction of the width It is connected to 1 pair of supporting part of described connecting pin part bently,

Described plate part has: 1 pair of edge, in the height direction faced by；And medial surface, at height Degree is between described 1 pair of edge on direction,

Described medial surface has: central crossbar portion, intersects with height center face；And retrogressing face, in phase While being positioned at sprocket wheel side for described height center face, the described edge with described sprocket wheel side is connected,

Described retrogressing face relative to widthwise central face in the direction of the width with described central crossbar portion phase Than the face shape more distally retreated.

Chain the most according to claim 1, is characterized by, described 1 pair of connecting pin part tool Have: 1 pair of counterpart, be positioned in the longitudinal direction relative to side；And 1 to non-counterpart, it is positioned at Side contrary with described 1 pair of counterpart in the longitudinal direction,

Described connecting pin part makes by laying respectively at described 1 pair of junction surface of described 1 pair of counterpart Chain tension acts on described plate part,

It is formed with the 1st engagement space the most alternately and engages space, the 1st engagement sky with the 2nd Between by described 1 pair of connecting pin part of described connecting piece unit and described 1 pair of plate part institute around, 2nd engagement space by the most adjacent described connecting piece unit connecting pin part each other and Described 1 pair of connector flat board institute around,

Multiple sprockets of described sprocket wheel can sequentially enter the most one by one described 1st engagement space and Described 2nd engagement space.

Chain the most according to claim 1, is characterized by, described in described sprocket wheel side is put down The plate height of plate part is less than the plate height of the described connector flat board in described sprocket wheel side.

Chain the most according to claim 1, is characterized by, the width in described retrogressing face Section configuration is convex shape towards described widthwise central face in the direction of the width, and, along with at height From described height center face near the described edge of described sprocket wheel side on direction, in from described widthwise central The arc-shaped that the width distance in face increases continuously.

Chain the most according to claim 1, is characterized by, described medial surface has planar shaped The central side of shape, its while comprising described central crossbar portion in the height direction with described retrogressing Face is connected,

Slab-thickness on described central authorities side is more than moving back the slab-thickness on face in the rear.

Chain the most according to claim 1, is characterized by, described retrogressing face is along with in length On direction from lengthwise centers face near described connecting pin part in the width side from described widthwise central face The curve form increased continuously to distance.