CN207906372U - A kind of chain improving transmission performance - Google Patents

Abstract

The utility model discloses a kind of chains improving transmission performance, including：Drive link, chain hinge pin, support axis pin；Wherein drive link offers chain pin axis hole and support pin shaft hole；Chain pin axis hole is symmetrically disposed on the side both ends of drive link；Support pin shaft hole is located at the other side of drive link；Drive link forms driving chain array by chain hinge pin, support axis pin through chain pin axis hole, support pin shaft hole respectively.The utility model is not only reasonable in design, and can simplify technique, while increasing the bending strength of chain link, makes the torque of chain carrying bigger, to realize the purpose for improving chain drive performance.

Description

A kind of chain improving transmission performance

Technical field

The utility model is related to technical field of mechanical transmission, more particularly to a kind of chain improving transmission performance Item.

Background technology

Chain is widely used in mechanical transmission fields, such as in contiuously variable transmission.But existing chain is in stepless change The axial compressive force of disk is bored in carrying while carrying pulling force in fast device, in addition to improving the polygon effect of chain, chain pin It is excessive that axis is unable to diameter.It, can be due to if chain hinge pin not overstriking when chain width is increased in order to carry large torque Insufficient rigidity and enter cornerite area when generate flexural deformation, to influence transmission performance.

Therefore, how to provide a kind of chain that can improve transmission performance is asking for those skilled in the art's urgent need to resolve Topic.

Utility model content

In view of this, the utility model provides a kind of chain that can improve transmission performance, it is not only simple in structure, is convenient for Production and processing, and the bending strength of chain link can be improved, and then ensure that chain has high moral transmission performance.

To achieve the goals above, the utility model adopts the following technical solution：

A kind of chain improving transmission performance, including：Drive link, chain hinge pin, support axis pin；

The wherein described drive link offers chain pin axis hole and support pin shaft hole；The chain pin axis hole is symmetrically disposed on The side both ends of the drive link；The support pin shaft hole is located at the other side of the drive link；

The drive link is respectively by the chain hinge pin, the support axis pin through the chain pin axis hole, described Pin shaft hole is supported to form driving chain array.

The utility model increases support axis pin on the basis of chain hinge pin, and supports axis pin by supporting pin shaft hole to pass through Drive link is worn, therefore axis pin is supported only to carry axial compressive force, without carrying chain pull；The setting of support axis pin makes chain exist In the case of carrying large torque, only by the width for increasing chain, the size without increasing chain hinge pin, it will be able to improve The transmission performance of chain.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, the support axis pin passes through with the drive link Riveting or welding are attached.

Due to being moved without mutual between support axis pin and drive link, therefore the form that riveting or welding may be used is connected It connects；And when supporting axis pin with drive link using welding or riveting, support pin shaft hole can remove setting for spin-ended plane Meter, correspondingly, support axis pin can also remove with the matched face of spin-ended plane, with support pin shaft hole matched.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, further include：It is mounted on the chain two by wheel shaft The cone disk at end.

For chain-type continuously variable transmission, in cornerite area, all chain pieces carry out axial constraints by two cone chuck clampings, thus into After entering non-packet angular region, all drive links will not axial float, to play the role of the axial constraint to all chain pieces；In chain Under tension force effect, there is enough frictional force between drive link and chain hinge pin, to ensure that chain hinge pin will not Axial float reaches the axial constraint to chain hinge pin.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, the chain hinge pin, the support axis pin extend Go out the both ends of the chain, and at least one kind is contacted with the cone disk in the chain hinge pin, the support axis pin.

It generally comprises chain hinge pin to contact with cone disk, axis pin is supported not contact with cone disk, supports axis pin to be contacted with cone disk, chain Axis pin is not contacted with cone disk and chain hinge pin, support axis pin are contacted with disk is bored；Preferably scheme is support axis pin and cone Disk contact, chain hinge pin are not contacted with cone disk.In non-packet angular zone, support axis pin does not stress, and only chain hinge pin carries chain Pulling force；One of which situation is when entering cornerite region, and support axis pin contacts carrying moment of flexure with cone disk, is carried for each chain link For better bending strength, so that chain can carry large torque, ensure that chain has high transmission performance；Another situation It is that support axis pin is not contacted with cone disk, does not carry axial compressive force, only serves the effect for increasing chain entirety lateral stiffness, at this time Chain hinge pin is contacted with cone disk, carries axial tension.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, concave rib, concave arc shape are uniformly provided on the conical surface The combination of any one of slot, fin or several shapes.

The conical surface of disk is bored by opening up fin, concave arc shape slot, concave rib and combinations thereof, be respectively formed pyramidal surface, the concave arc conical surface, The concave rib conical surface, the Compound Punch conical surface, the section view along its busbar angle are respectively straight line, camber line, broken line, recombination line；Therefore chain Item and the contact shape not instead of standard circular arc of cone discone antenna surface are fan-shaped, in regular polygon is fan-shaped or non-regular polygon is fan-shaped or Person abnormity, if transmit torque increase to frictional force be not enough to maintain when, chain begins with the trend of skidding, at this time due to chain Item and the contact shape of cone discone antenna surface are the fan-shaped either non-regular polygon sector of regular polygon or abnormity so that chain occurs non- Radial motion or radial componental movement can occur for each contact area of the deformation of circumference state, i.e. chain and cone discone antenna surface, This movement is formed reaction force by the tension of chain, prevents chain that radial motion or radial componental movement occurs, to prevent beating The formation of sliding movement, further has the function that transmitting large torque.

Preferably, in a kind of above-mentioned chain improving transmission performance, both ends of the surface and the conical surface of the support axis pin Shape match.

Since support axis pin only carries axial compressive force, chain pull, and the diameter for chain hinge pin are not carried It is generally large, for integration it is uniaxial, so the both ends of support axis pin are conveniently designed to the special song that the conical surface with cone disk matches Face makes contact area increase, and then reduces contact stress, protection chains and the conical surface with coincideing for conical surface curved surface, improves chain With the service life of the conical surface.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, the chain hinge pin includes cylindrical pin, roller bolt Axis, and the diameter of the general chain hinge pin is no more than the diameter of the support axis pin.

When chain hinge pin runs through drive link, and is not contacted with cone disk, chain hinge pin does not carry axial compressive force, can be direct The connection that chain hinge pin and drive link are realized in riveting is carried out, it is not only simple for process, at low cost, but also only by support axis pin and cone Face contacts, and technique more simplifies；Existing chain hinge pin is abutted with cone disk, and chain hinge pin both ends of the surface are the face angle with cone disk Consistent inclined-plane is spent, is contacted with cone disk and carries axial compressive force and chain pull simultaneously, overstriking cannot be passed through under polygon effect Design increases torque, improves transmission performance.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, the support pin shaft hole be equipped with spin-ended face, it is described stop Radial facing includes spin-ended plane or spin-ended curved surface.

Spin-ended face can prevent the rotation between support axis pin and drive link；And spin-ended face can set there are one or it is more It is a, it may be provided in top, bottom or any other position of support pin shaft hole.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, the support axis pin equipped with and the spin-ended face The face matched.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, be arranged in the U-shaped of driving chain array both ends Chain piece, and the U-shaped chain piece is equipped with U-shaped bonding pad, and connected the adjacent drive link in both sides by the U-shaped bonding pad It is connected into integrated assembly, carries out the constraint of the clamping to the adjacent drive link；The setting of the U-shaped bonding pad is for omitting The support axis pin and the support pin shaft hole；Or the U-shaped chain piece be designed to it is variform different with the drive link Shape chain piece.

Two adjacent drive links are connected as assembly by U-shaped chain piece by U-shaped bonding pad, realize to adjacent biography The clamping of dynamic chain piece, effect of contraction；Simultaneously by the setting in the U-shaped chain piece in drive link array both sides, make the outer of entire chain Side is connected, and U-shaped chain piece plays the effect of contraction to outside chain piece, eliminates in conventional fabrication processes and welds or rivets work Skill makes chain manufacturing cost decline, improves reliability, extends service life；Therefore, pass through U-shaped chain piece and drive link It carries out alternating overlap joint assembly, so that it may so as to be connected on the outside of entire chain, play the effect of contraction to whole chain. Meanwhile the utility model is designed by the setting of U-shaped bonding pad or the abnormity on drive link top, can replace supporting pin Axis and fulcrum post axis hole, it is same to have the function of increasing bearing torque, improve transmission performance, for solution the utility model proposes Practical problem.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, the U-shaped chain piece, the drive link top For arc-shaped curved surface or plane.

U-shaped chain piece, drive link tip designs be arc-shaped curved surface or plane, the structure of especially plane chain piece sets Meter, can reduce the height of U-shaped chain piece, drive link, and then reduces the diameter of cone disk, reduces volume, save material, reduce at This.

Preferably, it is above-mentioned it is a kind of improve transmission performance chain in, the drive link has been designed as sprocket or nothing The sprocket tooth form of sprocket, the drive link includes involute, cycloidal, rectangle, trapezoidal, inverted trapezoidal, inclined ladder shape, triangle Shape, and the sprocket is set to the inner central position of the drive link, or close to two side positions.

Preferably, in a kind of above-mentioned chain improving transmission performance, the chain slack list, chain non-packet angular region point Tensioning wheel, directing plate are not installed.

Installation tensioning wheel can ensure the tensile force requirement of chain slack list, avoid chain hinge pin axial float；For non-packet Angular region is too long or the occasion of vibration can increase directing plate, directing plate can constrain to increase safety to non-packet angular region chain Chain hinge pin has the function of eliminating chain vibration or shake.

It can be seen via above technical scheme that compared with prior art, the utility model, which discloses, provides a kind of raising biography The chain of dynamic performance makes support pin bearing carry axial compressive force, not carry chain drawing by adding support axis pin, support pin shaft hole Power realizes the purpose of chain carrying large torque, improves the bending strength of chain link and the high transmission performance of chain；This practicality It is novel be not only simple in structure, production technology simplifies, and large torque can be carried, the transmission performance of chain be improved, in stepless change The chains application field such as fast device has broad application prospects and development space.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to the attached drawing of offer.

Fig. 1 attached drawings are the structural schematic diagram of the utility model；

Fig. 2 attached drawings are the connection diagram of the U-shaped chain piece of the utility model, drive link；

Fig. 3 attached drawings are the utility model chain pin axis hole, support the schematic diagram one of pin shaft hole；

Fig. 4 attached drawings are the utility model chain pin axis hole, support the schematic diagram two of pin shaft hole；

Fig. 5 attached drawings are the utility model chain pin axis hole, support the schematic diagram three of pin shaft hole；

Fig. 6 attached drawings are the schematic diagram of the utility model Fig. 1 and cone disk；

Fig. 7 attached drawings are another structural schematic diagram of the utility model；

Fig. 8 attached drawings are the schematic diagram of the utility model Fig. 5 and cone disk；

Fig. 9 attached drawings are the structural schematic diagram one that the utility model bores disk；

Figure 10 attached drawings are the structural schematic diagram two that the utility model bores disk；

Figure 11 attached drawings are the structural schematic diagram three that the utility model bores disk；

Figure 12 attached drawings are the structural schematic diagram four that the utility model bores disk；

Figure 13 attached drawings are the schematic diagram that the utility model supports axis pin and the conical surface；

Figure 14 attached drawings are structure chart of the utility model chain hinge pin when chain tenses；

Figure 15 attached drawings are that the utility model only chain hinge pin contacts with cone disk, supports axis pin and the cone discontiguous signal of disk Figure；

Figure 16 attached drawings are the utility model another kind structural schematic diagram；

Figure 17 attached drawings are the structural schematic diagram of the U-shaped chain piece of the utility model；

Figure 18 attached drawings are the structural schematic diagram of the utility model drive link；

Figure 19 attached drawings are the special-shaped chain chip architecture schematic diagram of the utility model drive link.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

The utility model embodiment discloses a kind of chain improving transmission performance, is only carried in cornerite region by being arranged Axial compressive force, the support axis pin for not carrying chain pull, the bending strength of bigger are provided for chain link so that chain can carry The torque of bigger, and then realize purpose of the chain with high transmission performance.

Embodiment 1：

Specification 1-5, attached drawing 7 are please referred to, the utility model provides a kind of chain improving transmission performance, including：It passes Dynamic chain piece 1, chain hinge pin 3, support axis pin 4；

Wherein drive link 1 offers chain pin axis hole 5 and support pin shaft hole 6；Chain pin axis hole 5 is symmetrically disposed on transmission The side both ends of chain piece 1；Support pin shaft hole 6 is located at the other side of drive link 1；

Drive link 1 is formed and is passed through chain pin axis hole 5, support pin shaft hole 6 by chain hinge pin 3, support axis pin 4 respectively Dynamic chain strip array.

In order to advanced optimize above-mentioned technical proposal, support axis pin 4 and drive link 1 are by riveting or the company of welding It connects.The connection type of support axis pin 4 and drive link 1 is not limited to rivet or weld.

A kind of chain improving transmission performance, please refers to attached drawing attached drawing 6, attached drawing 8, further includes：It is mounted on chain by wheel shaft The cone disk 7 at both ends.

In order to advanced optimize above-mentioned technical proposal, chain hinge pin 3, support axis pin 4 extend the both ends of chain, and chain In axis pin 3, support axis pin 4 it is at least a kind of with bore disk 7 and contact.

In order to advanced optimize above-mentioned technical proposal, chain hinge pin 3 includes cylindrical pin, rolls axis pin, and general chain Diameter of the diameter of axis pin 3 no more than support axis pin 4.

Figure of description 14 is please referred to, in the exceptionally straight tension of chain, cylindrical pin is automatically by the adjacent drive link in both sides It clamps, on the one hand can prevent cylindrical pin transverse shifting, on the other hand can prevent chain back-flexing, avoid chain Vibrations are shaken, therefore positive bending can only occur for chain, can not carry out back-flexing, and cylindrical pin, which is equivalent to play, is oriented to boots Effect.

Figure of description 1 and 6 is please referred to, when chain hinge pin 3 is with cone 7 taper-face contact of disk, the both sides of the face of chain hinge pin 3 For with the consistent inclined-plane of the cone frustoconical bevel angle of disk 7, while carrying axial compressive force and chain pressure；

Figure of description 7 and 8 is please referred to, when chain hinge pin 3 is not contacted with cone 7 conical surface of disk, chain hinge pin 3, which only has, to be connected Effect is connect, pendulum pin is equivalent to, can directly be riveted with chain piece, only by support axis pin and taper-face contact, technique more simplifies, can It is processed with traditional handicraft；

Figure of description 15 is please referred to, when chain hinge pin 3 and taper-face contact support axis pin 4 not with taper-face contact, branch Support axis pin 4 does not carry axial compressive force, only serves the effect for increasing chain entirety lateral stiffness, and chain hinge pin connects with cone disk at this time It touches, carries axial tension.

In order to advanced optimize above-mentioned technical proposal, drive link 1 has been designed as sprocket or without sprocket, drive link 1 10 tooth form of sprocket include involute, cycloidal, rectangle, trapezoidal, inverted trapezoidal, inclined ladder shape, triangle, and sprocket be set to transmission The inner central position of chain piece 1, or close to two side positions.

In order to advanced optimize above-mentioned technical proposal, chain slack list, chain non-packet angular region are separately installed with tensioning wheel, guiding Plate.

Embodiment 2：

Please refer to Figure of description 16, a kind of chain improving transmission performance, including：Drive link 1, U-shaped chain piece 2, chain Axis pin 3；

Wherein U-shaped chain piece 2 offers chain pin axis hole 5 with drive link 1；Chain pin axis hole 5 is symmetrically arranged in U The side both ends of type chain piece 2 and drive link 1；Support pin shaft hole 6 is located at the other side of U-shaped chain piece 2 and drive link 1；

Drive link 1 forms driving chain array by chain hinge pin 3 through chain pin axis hole 5；Driving chain array Both ends are respectively provided with there are one U-shaped chain piece 2, and the chain hinge pin 3 of driving chain array extends through the chain pin axis hole 5 of U-shaped chain piece 2 Form chain.

In order to advanced optimize above-mentioned technical proposal, Figure of description 16,17 is please referred to, U-shaped chain piece 2 is equipped with U-shaped connection Area 20, and the assembly that the adjacent drive link 1 in both sides is linked into an integrated entity by U-shaped bonding pad 20, carry out to adjacent drive The clamping of chain piece 1 constrains；The setting of U-shaped bonding pad 20 can omit support axis pin 4 and support pin shaft hole 6 simultaneously；

Or U-shaped chain piece 2 be designed to the variform special-shaped chain piece of drive link 1, please refer to the biography of Figure of description 18 The structural schematic diagram of the special-shaped chain piece of structural schematic diagram and attached drawing 19 of dynamic chain piece, U-shaped chain piece are designed as special-shaped chain piece for going Except support axis pin 4 and support pin shaft hole 6.

Two adjacent drive links are connected as assembly by U-shaped chain piece by U-shaped bonding pad, realize to adjacent biography The clamping of dynamic chain piece, effect of contraction；Therefore, it carries out alternating overlap joint assembly by U-shaped chain piece and drive link, so that it may so that It is connected on the outside of entire chain, plays the effect of contraction to whole chain.Meanwhile the utility model passes through U-shaped bonding pad Setting or drive link top abnormity design, can replace support axis pin and fulcrum post axis hole, it is same have to increase hold Carry torque, improve transmission performance effect, for solve the utility model proposes practical problem.

The technical solution of other technologies scheme and embodiment 1 please mutually referring to.

Embodiment 3：

On the basis of 1 technical solution of embodiment, in order to advanced optimize above-mentioned technical proposal, attached drawing 3-5 is please referred to, is propped up It supports pin shaft hole 6 and is equipped with spin-ended face, spin-ended face includes spin-ended plane or spin-ended curved surface.

It should be noted that when supporting axis pin to rivet or weld with drive link, spin-ended face can not be set.

In order to advanced optimize above-mentioned technical proposal, support axis pin 4 is equipped with and the matched face in spin-ended face.

In figure 3, spin-ended face is set to the bottom of support pin shaft hole；In Fig. 4, spin-ended face is respectively arranged on support pin shaft hole Top and bottom；In Figure 5, spin-ended face is set to the top of support pin shaft hole.

When spin-ended face as illustrated in figs.3-5, support axis pin 4 side be internal conical surface, this design have increase supporting pin Axis and taper-face contact area, reduction curvature and the effect for reducing stress concentration.

Embodiment 4：

On the basis of embodiment 1 or 2 technical solution, in order to advanced optimize above-mentioned technical proposal, specification is please referred to Attached drawing 3, U-shaped chain piece 2, drive link 1 top be arc-shaped curved surface.

Embodiment 5：

On the basis of 2 technical solution of embodiment 1 or embodiment, in order to advanced optimize above-mentioned technical proposal, please refer to Figure of description 4-5, U-shaped chain piece 2, drive link 1 top be plane.

U-shaped chain piece, drive link tip designs be plane, can reduce chain piece height, reduce cone disk diameter, and then contract Small size；Have many advantages, such as to economize on resources, mitigate weight；Chain piece top is that the design of plane is designed as more compared to arc-shaped curved surface Excellent technical solution.

Embodiment 6：

On the basis of embodiment 1, in order to advanced optimize above-mentioned technical proposal, Figure of description 9 is please referred to, on the conical surface It is uniformly provided with fin, the conical surface is pyramidal surface.

In order to advanced optimize above-mentioned technical proposal, the shape of the both ends of the surface and pyramidal surface that support axis pin 4 matches.

Embodiment 7：

On the basis of 1 technical solution of embodiment, in order to advanced optimize above-mentioned technical proposal, Figure of description is please referred to 10, concave arc slot is uniformly opened up on the conical surface, the conical surface is the concave arc conical surface.

In order to advanced optimize above-mentioned technical proposal, the both ends of the surface of axis pin 4 and the shape of the concave arc conical surface is supported to match.

Embodiment 8：

On the basis of 1 technical solution of embodiment, in order to advanced optimize above-mentioned technical proposal, Figure of description is please referred to 11, indent crest line is uniformly provided on the conical surface, the conical surface is the concave rib conical surface.

In order to advanced optimize above-mentioned technical proposal, the both ends of the surface of axis pin 4 and the shape of the concave rib conical surface is supported to match.

Embodiment 9：

On the basis of 1 technical solution of embodiment, in order to advanced optimize above-mentioned technical proposal, Figure of description is please referred to 12, fin is uniformly provided on the conical surface, and indent crest line and concave arc slot are opened up in fin both sides, the conical surface is Compound Punch cone Face.

In order to advanced optimize above-mentioned technical proposal, the shape phase of the both ends of the surface and the Compound Punch conical surface of axis pin 4 is supported Match.

In above-described embodiment 5- embodiments 8, Figure of description 13 is please referred to, provides contact of the support axis pin with the conical surface Schematic diagram, the utility model using radial small displacement, construction circumference to stepless engagement effect, from circle circumferential cross-section exhibition It opens, engaged transmission relation is presented with cone disk in support axis pin, makes the transmission torque bigger of chain；In Figure of description 10-12, if It is circumferentially splitted to annular, is pyramidal surface compared to cone disk, the concave arc conical surface bores disk, concave rib conical surface cone disk, the Compound Punch conical surface It is curved surface in fact that disk, which is bored, with the contact of support axis pin, can transmit the torque of bigger, is the utility model more preferably technical solution.

Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is said referring to method part It is bright.

The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest range consistent with features of novelty.

Claims (10)

1. a kind of chain improving transmission performance, which is characterized in that including：Drive link (1), chain hinge pin (3), support axis pin (4)；

The wherein described drive link (1) offers chain pin axis hole (5) and support pin shaft hole (6)；The chain pin axis hole (5) is right Claim the side both ends for being set to the drive link (1)；The support pin shaft hole (6) is located at the another of the drive link (1) Side；

The drive link (1) runs through the chain pin axis hole by the chain hinge pin (3), the support axis pin (4) respectively (5), the support pin shaft hole (6) forms driving chain array.

2. it is according to claim 1 it is a kind of improve transmission performance chain, which is characterized in that the support axis pin (4) and The drive link (1) is attached by way of riveting or welding.

3. a kind of chain improving transmission performance according to claim 1 or 2, which is characterized in that further include：Pass through wheel shaft Cone disk (7) mounted on the chain both ends.

4. a kind of chain improving transmission performance according to claim 3, which is characterized in that the chain hinge pin (3), institute The both ends that support axis pin (4) extends the chain are stated, and in the chain hinge pin (3), the support axis pin (4) at least It is a kind of to be contacted with the cone disk (7).

5. a kind of chain improving transmission performance according to claim 4, which is characterized in that the conical surface of the cone disk (7) On be uniformly provided with the combination of any one of concave rib, concave arc shape slot, fin or several shapes；And the support axis pin (4) Both ends of the surface and the shape of the conical surface match.

6. a kind of chain improving transmission performance according to claim 1, which is characterized in that chain hinge pin (3) packet It includes cylindrical pin, roll axis pin.

7. a kind of chain improving transmission performance according to claim 1, which is characterized in that the support pin shaft hole (6) Equipped with spin-ended face, the spin-ended face includes spin-ended plane or spin-ended curved surface；The support axis pin (4) is equipped with and the spin-ended face Matched face.

8. a kind of chain improving transmission performance according to claim 1, which is characterized in that be arranged in the driving chain The U-shaped chain piece (2) at array both ends, and the U-shaped chain piece (2) is equipped with U-shaped bonding pad, and by the U-shaped bonding pad by both sides The assembly that the adjacent drive link (1) links into an integrated entity carries out the constraint of the clamping to the adjacent drive link (1)； The setting of the U-shaped bonding pad is for omitting the support axis pin (4) and the support pin shaft hole (6)；Or the U-shaped chain piece (2) it is designed to and the variform special-shaped chain piece of the drive link (1).

9. a kind of chain of raising transmission performance according to claim 1 or 8, which is characterized in that the U-shaped chain piece (2), The top of the drive link (1) is arc-shaped curved surface or plane；The wherein described drive link (1) has been designed as sprocket or nothing The sprocket tooth form of sprocket, the drive link (1) includes involute, cycloidal, rectangle, trapezoidal, inverted trapezoidal, inclined ladder shape, three It is angular, and the sprocket is set to the inner central position of the drive link (1), or close to two side positions.

10. a kind of chain improving transmission performance according to claim 1, which is characterized in that the chain slack list, described Chain non-packet angular region is separately installed with tensioning wheel, directing plate.