KR20230062407A - Chain - Google Patents

Abstract

In order to provide a chain with high noise-quietness, the chain is provided with a plurality of first and second links and a plurality of pins that alternately connect these plurality of first and second links. The plurality of pins include a first pin 231a, a second pin 232a, and a third pin 232b arranged in the direction TD of the chain. The offset amount between the center 231C of the first pin 231a and the contact point 500 at which contact with the pulley in the end surface of the first pin 231a starts is defined as the first offset amount X1 and the second pin 232a. ) When the offset amount between the contact point 510 at which the contact with the pulley starts in the cross section and the center 232C of the second pin 232a is the second offset amount X2, the first offset amount X1 and the second offset amount X1 2 The offset amount X2 is different.

Description

chain {CHAIN}

The present invention relates to chains.

Generally, as a speed changer for automobiles, power from an input pulley is transmitted by an output pulley and a chain, and at the same time, by changing the groove width of the input pulley and the output pulley, the winding radius of the chain is changed and speed is continuously shifted. Transmissions (CVTs) are known.

Conventionally, in the chain for such a CVT, the chain comprised using the chain link of two or more types of length is known (refer patent document 1). The CVT chain uses two or more lengths of chain links to distribute the frequency of the noise generated when the pin and the conical surface of the pulley come into contact. inhibiting growth.

Patent Document 1: Japanese Patent Publication No. 2017-507299

However, the method of Patent Literature 1 requires two or more types of chain links having different lengths. For this reason, the emergence of a chain with increased quietness by a structure different from the method described in Patent Document 1 has been desired.

Then, an object of the present invention is to provide a chain with high quietness.

One aspect of the present invention is a plurality of first and second links each having an outer plate and an inner plate disposed between the outer plates, and a plurality of alternately connecting the plurality of first and second links. A chain having pins and performing power transmission by frictional contact of end faces of the plurality of pins with a pulley, wherein the plurality of pins include a first pin, a second pin, and a third pin arranged in a traveling direction of the chain. a pin, wherein a chain pitch between the first pin and the second pin is equal to a chain pitch between the second pin and the third pin, and a contact with the pulley at an end surface of the first pin A first offset amount is defined as an offset amount between a contact point that initiates contact and the center of the first pin, and an offset amount between the contact point that initiates contact with the pulley and the center of the second pin in the end face of the second pin. When is set as the second offset amount, the chain is characterized in that the first offset amount and the second offset amount are different.

According to the present invention, the quietness of the chain can be improved.

1 is a schematic perspective view showing a continuously variable transmission (CVT) using a chain according to a first embodiment.
Fig. 2 (a) is a schematic perspective view showing the chain according to the first embodiment, and (b) is a side view of the chain.
3 is an exploded perspective view illustrating a first link;
4 is an exploded perspective view illustrating a second link;
Fig. 5 (a) is a plan view showing a chain in a state in which tension is not applied. (b) is a plan view showing the chain in a tensioned state.
Fig. 6 (a) is an explanatory diagram showing a first type pin, and (b) is an explanatory diagram showing a second type pin.
Fig. 7 (a) is a side view of the first type pin, (b) is a front view of the first type pin, and (c) is a VIIC-VIIC sectional view in (a).
8 is a plan view of the chain.
9 is an explanatory diagram for explaining a method of setting the machining angle θ.
Fig. 10 is an explanatory diagram for explaining a method of setting the fin minimum deflection angle θp.
Fig. 11 is a diagram showing a type 1 pin and a type 2 pin according to the first embodiment.
Fig. 12 is an explanatory view showing a method for processing end surfaces of a first-class pin and a second-class pin.
Fig. 13 (a) is a diagram showing a type 1 fin partially subjected to R processing, and (b) is a diagram showing a type 1 fin subjected to overall R processing on its end surface.

Hereinafter, a CVT chain according to an embodiment of the present invention will be described with reference to the drawings. In the following description, the lengthwise direction of the chain is assumed to be the chain travel direction, the downstream side in the chain travel direction is referred to as the front, and the upstream side in the chain travel direction is referred to as the rear. Further, the shorter direction of the chain is referred to as the axial direction of the pin or the widthwise direction of the chain.

<First Embodiment>

(Schematic configuration of chain for CVT)

As shown in FIG. 1 , a continuously variable transmission (CVT) 10 includes a driving pulley (input side pulley) 11 , a driven pulley (output side pulley) 12 and a chain 13 . The driving pulley 11 is composed of a movable sheave 14 and a fixed sheave 15 formed of opposing cones, and the driven pulley 12 also includes a movable sheave 16 and a fixed sheave 17 A chain 13 is wound between these two pulleys 11 and 12. In the continuously variable transmission (CVT) 10, by moving the movable sheave 14 of the driven pulley 11, the chain winding radius of the driven pulley 11 is adjusted, and accordingly, the chain winding of the driven pulley 12 As the radius moves, the rotation of the driving pulley 11 is transmitted to the driven pulley 12 at a stepless speed change.

As shown in (a) of FIG. 2, in the chain 13, first (external) links 19 and second (internal) links 20 are alternately connected by a plurality of pins 23, It is formed in an endless shape. As shown in FIG. 3 , the first link 19 has an outer plate 21 and an inner plate 22 connected by pins 23 . The outer plates 21 are located at both ends of the pin 23 in the axial direction (chain width direction), and a plurality of inner plates 22 are disposed between the outer plates 21 . The outer plate 21 has a pair of substantially semicircular pin holes 25 and 26, and the inner plate 22 has a circular pin hole 27 and a substantially semicircular pin hole 29. there is. The pin 23 is press-fitted and fixed to one pin hole 25 of the outer plate, and extends through the circular pin hole 27 of the inner plate 22 .

As shown in FIG. 4, the 2nd link 20 has the outer plate 21, the inner plate 22, and the pin 23 similarly to the outer link 19, and the outer plate 21 has the pin 23 ) is located at both ends in the axial direction (chain width direction), the pin 23 is press-fitted and fixed to the pin hole 25 on one side, and the inner plate 22 has a circular shape between the two outer plates 21. A pin 23 is passed through the pin hole 27 and is disposed. The inner plate 22 of the second (inner) link 20 is one less than the inner plate 22 of the outer link 19, so the outer plate 21 of the first (outer) link 19 is the chain It is arranged at the extreme end of (13) in the width direction. In addition, the outer plate 21 and the inner plate 22 of the first link 19 and the second link 20 each have the same shape, and the chain 13 is shown in Fig. 2(b). As such, the chain pitch P is configured to be the same over the entire length.

In the first link 19, a pin 23 on one side is press-fitted and fixed into a pin hole 25 on one side (front) of the outer plate 21, and the pin 23 is attached to a plurality of inner plates 22. Although the pin hole 27 is inserted so as to be movable in the axial direction, the arc surface 23a of the pin 23 adheres to the outer surface of the pin hole 27 on one side of the inner plate 22 to provide a rolling tensile force. At the same time as being supported, it is integrally connected with the pin 23 in the direction of rotation. Similarly to the outer link 19, in the second link 20, one pin 23 is press-fitted and fixed into one pin hole 25 of the outer plate 21, and the pin 23 is internally The pin hole 27 on one side of the plate 22 is integrally connected in the rotational direction so as to bear the rolling tensile force, and is fitted so as to be movable in the axial direction.

Then, a pin hole 25 on one (front) side of the first link 19 is outside the pin hole 26 on the other side (rear side) of the outer plate 21 in the second link 20 in the width direction. ) is positioned so that it overlaps, and the inner plate 22 of the second link 20 and the inner plate 22 of the first link 19 are alternately disposed so that the first link 19 and the second link 20 ) are 1 pitch apart and connected by pins 23.

In the first link 19, pins 23 integrated in the direction of rotation are connected to pin holes 25 on one side (front) of the outer plate 21 and pin holes 27 on one side (front) of the inner plate 22. ) is transmitted by a predetermined amount to the pin hole 26 on the other side (rear side) of the outer plate 21 and the pin hole 29 on the other side (rear side) of the inner plate 22 in the second link 20. possibly fitted. More specifically, the pin 23 is formed in a left and right asymmetrical cross-sectional shape, and the arc surface 23b on the rear side (see FIG. 2(b)) is R relative to the arc surface 23a on the front side. It becomes this large (that is, small curvature) circular arc surface, and this circular arc surface 23b rolls in the transmission range of the pinholes 26 and 29.

Similarly, the pin hole 25 on one side (front) of the outer plate 21 in the second link 20 and the pin hole 27 on one side (front) of the inner plate 22 in the direction of rotation are integrated. Reference numeral 23 denotes a pin hole 26 on the other side (rear side) of the outer plate 21 in the first link 19 and a pin hole 29 on the other side (rear side) of the inner plate 22. It is fitted so that quantitative transmission is possible. Thereby, the 1st link 19 and the 2nd link 20 can bend a predetermined amount by the rotation of the other (rear) pin hole 26, 29 and the pin 23, respectively.

In addition, both the left and right end surfaces of the pin 23 are inclined surfaces inclined at a predetermined angle in the axial direction in accordance with the pulley surfaces 600 of the sheaves 14, 15, 16, and 17 formed by conical curved surfaces. (For example, see section 300 of FIG. 7(a)). The chain 13 transmits power when the left and right end surfaces of the pin 23 come into frictional contact with the pulley surfaces of the pulleys 11 and 12 .

(silent design of the chain)

Next, the quiet design of the chain 13 will be described. As described above, in the chain for CVT, power is transmitted by frictional contact between the end face of the pin 23 and the pulley surface. Here, when the chain pitch is the same, since the contact timing between the end surface of the pin 23 and the surface of the pulley at the time of driving is usually constant, the noise level of a specific frequency increases for each rotation of the pulley, causing unpleasant noise due to resonance. It had become a factor in its occurrence.

When tension is generated in the chain for CVT during power transmission, the tension in FIG. 5 (a) is applied to the state in which tension is not applied in FIG. and lean Then, the distance between the contact (collision) between the end face of the pin 23 and the pulley (that is, the distance between the contact points between adjacent pins when the point at which the end face of the pin 23 starts contact with the pulley is set as the contact point) ), the contact pitch changes from the interval A in Fig. 5(a) to the intervals B and C shown in Fig. 5(b). In this embodiment, the contact pitch is made random by configuring the above-described plurality of pins 23 using a plurality of types of pins having different contact points with the pulley when tension is applied by changing the cross-sectional shape of the pins. change, and prevents the noise level of a specific frequency from increasing.

Hereinafter, the configuration of the plurality of pins 23 will be described in detail. In addition, about the shape of the cross section of the pin 23, it has become the same shape in the cross section of the left and right. For this reason, in the following description, the shape of one cross section is demonstrated by way of example, and the description of the shape of the other cross section is omitted.

In this embodiment, the plurality of pins 23 are two types of pins, a first type pin 231 shown in FIG. 6(a) and a second type pin 232 shown in FIG. 6(b) is composed by These first-class and second-class pins 231 and 232 differ only in the cross-sectional shape in the axial direction, and the other configurations are the same. Specifically, the cross section 300 of the first type pin 231 is not only inclined in the axial direction aligned with the pulley surface shown in FIG. 7(a), but also as shown in FIG. It is configured to be inclined also in the traveling direction TD.

More specifically, the end face 300 is located on the upstream side of the first surface 310 through which the center 231C of the first type pin 231 passes, and the first surface 310 in the traveling direction of the chain 13 and a second surface 320 to be disposed, and a third surface 330 located downstream of the first surface 310 in the traveling direction of the chain 13. In the second surface 320, the end portion 322 on the center 231C side of the first type pin 231 is closer to the axial direction of the first type pin 231 than the end portion 321 on the upstream side in the moving direction of the chain. It is an inclined surface (first inclined surface) inclined in the traveling direction of the chain 13 so as to be located outside.

Further, in the third surface 330, the end 332 on the center 231C side of the first type pin 231 is closer to the end 331 on the downstream side in the traveling direction of the chain 13. It is an inclined surface (third inclined surface) inclined in the traveling direction of the chain 13 so as to be located outside in the axial direction of ).

As shown in FIG. 7(c), which is a VIIC-VIIC cross section in FIG. 7(a), the second surface 320 and the third surface 330 are the first type of the second surface 320 The distance (first distance) La1 from the end 322 on the center 231C side of the pin 231 to the center 231C of the first type pin 231 and the first type pin on the third surface 330 It is formed so that the distance of the distance (third distance) La2 from the end part 332 on the center 231C side of 231 to the center 231C of the first type pin 231 is equal (La1 = La2) .

In addition, as shown in Fig. 6(b), the cross section 400 in the axial direction of the second type pin 232 is likewise the fourth through which the center 232C of the second type pin 232 passes. The fifth surface 420 located on the upstream side of the chain 13 in the traveling direction of the chain 13 from the surface 410 and the fourth surface 410, and the downstream side from the fourth surface 410 in the traveling direction of the chain 13 It has a sixth surface 430 positioned thereon. In the fifth surface 420, the end 422 on the center 232C side of the type 2 pin 232 is closer to the axial direction of the type 2 pin 232 than the end 421 on the upstream side in the traveling direction of the chain. It is an inclined surface (second inclined surface) inclined in the traveling direction of the chain 13 so as to be located outside.

Further, in the sixth surface 430, the end 432 on the center 232C side of the second type pin 232 is closer to the end 431 on the downstream side in the traveling direction of the chain 13. It is an inclined surface (fourth inclined surface) inclined in the traveling direction of the chain 13 so as to be located outside in the axial direction of ).

These 5th surface 420 and 6th surface 430 are the center of the 2nd type pin 232 at the end part 422 on the center 232C side of the 2nd type pin 232 of the 5th surface 420. The distance (fourth distance) Lb1 to 232C and the center of the type 2 pin 232 from the end 432 on the center 232C side of the type 2 pin 232 on the sixth surface 430 ( 232C) is formed so that the distance (second distance) Lb2 becomes equal (Lb1 = Lb2).

The change amount of the contact pitch described above is determined by the distances La1, La2, Lb1, and Lb2, and La1/La2 and Lb1/Lb2 are different in the first type pin 231 and the second type pin 232, respectively. For this reason, when the first type pin 231 and the second type pin 232 are used as in the present embodiment, as shown in Fig. 8, it is possible to provide six types of contact pitches from A to F. .

For example, when looking at the first pin 231a, the second pin 232a, and the third pin 232b arranged adjacent to the traveling direction TD of the chain 13, the first pin 231a is the bending of the pin. The rim direction (convex direction) is the upstream side (rear side, lower side in the drawing), the second fin 232a has a different bending direction from the first fin 231a, and the downstream side (front side, The upper side in the drawing) is bent so that it becomes convex. Then, according to the difference in cross-sectional shape, the offset amount between the contact point 500 with the pulley of the first pin 231a, which is the first type pin 231, and the center 231C of the first pin 231a (the first Offset amount) X1 and the offset amount between the contact point 510 of the pulley of the second pin 232a, which is the second type pin 232, and the center 232C of the second pin 232a (second offset amount) X2 is of different quantities. For this reason, although the chain pitch P does not change, the contact pitch between the first pin 231a and the second pin 232a is P−X1+X2, and the second pin 232a and the third pin 232b The contact pitch between them is P-2×2. In addition, in the case of this embodiment, the contact points 500 and 510 with the pulley are ends 332 and 432, respectively. For this reason, P-X1+X2=P-La1+Lb1, and P-2×2=P-Lb1-Lb2. Further, in the present embodiment, since the bending directions of adjacent fins are different as described above, the pitch change of the contact pitches A to F can be increased even if the deflection angle of the fins is not large.

As described above, in the chain 13 according to the present embodiment, the contact point with the pulley is different depending on the difference in cross-sectional shape (geometric shape) of the first type pin 231 and the second type pin 232. The first link 19 and the second link 20 are connected by randomly using pins. This makes it possible to increase the number of contact pitches to at least four or more, and it is possible to silence the chain 13 using a change in the collision timing between the pin 23 and the pulley.

In addition, since the chain 13 can be made quiet only by using a plurality of types of pins with different cross-sectional shapes, the noise level of a specific frequency can be reduced while suppressing the increase in the number of parts and the number of assembly steps to a minimum.

<Second Embodiment>

Next, a second embodiment will be described. Further, in the second embodiment, only the cross-sectional shape of the pin 23 is different from the first embodiment. For this reason, in the following description, only the difference from 1st Embodiment is demonstrated, and other description is abbreviate|omitted.

In the first embodiment described above, the first type pin 231 is configured so that La1 = La2, and the second type pin 232 is configured so that Lb1 = Lb2. On the other hand, in this embodiment, the values of La1, La2, Lb1, and Lb2 are different to form the first type fin 231 and the second type fin 232 different from those of the first embodiment.

In addition, when designing the first type pin 231 and the second type pin 232, in the present embodiment, in addition to the values of La1, La2, Lb1, and Lb2, they are designed to have the following configuration, that is, As shown in Fig. 9, the tangential angle at the contact point of the pin on the curved pulley surface 600 is θs, and the second, third, fifth, and sixth surfaces 320, 330, 420, and 430 are machined. When the angle is θ and the deflection angle of the pin is θp, the tangent angle θs changes according to the pulley cone angle, the chain pitch, and the distance from the center of the pulley to the contact point (winding radius).

Here, if θ < θs + θp, the circumferential ends of the pins 231 and 232 become contact points. For this reason, in this embodiment, the maximum tangential angle obtained by calculation and experiment is θsmax so that the circumferential ends 321, 331, 421, 431 of the pins 231, 232 do not become contact points, and the chain by the maximum chain tension When the maximum deflection angle, which is the deflection angle of , is set to θpmax, the processing angle θ is set so as to satisfy the expression θ>θsmax+θpmax.

Further, when the minimum deflection angle, which is the deflection angle of the chain due to the minimum chain tension, is set to θpmin, θpmin>θsmax. By satisfying the condition, it becomes possible to set the contact point of the pin 23 with the pulley to the position shown in Fig. 10, so that the pin and pulley can be brought into contact at a stable point even if the chain tension and winding radius change. can For example, the contact point 500 of the first pin 231a is located on the center 230C side of the first pin 231a on the first inclined surface 320 from the end portion 321 on the upstream side in the chain traveling direction. , and the contact point 510 in the cross section of the second pin 232a is closer to the center 232C of the second pin 232a than the end portion 431 on the downstream side in the direction in which the chain travels in the second inclined surface 430. ) is located on the side.

<Example 1>

Hereinafter, a plurality of examples in which the values of La1, La2, Lb1, and Lb2 are different are described. First, an example configured so that the values of La1, La2, Lb1, and Lb2 are all different will be described. As shown in Fig. 11, in this embodiment, La1, La2, Lb1, and Lb2 are all different values. In this way, eight patterns of P±(La1+Lb2), P±(La2+Lb1), P±(La1+La2), and P±(Lb1+Lb2) can be formed at maximum contact pitch.

<Example 2>

Next, the second embodiment will be described. In this embodiment, in order to efficiently manufacture the cross section of the first type pin 231 and the second type pin 232, the sum of the distance La1 and the distance La2 of the first type pin 231 is the second type pin 232 ) is formed to be equal to the sum of the distances Lb1 and Lb2. That is, L=La1+La2=Lb1+Lb2.

For this reason, as shown in FIG. 12, by changing the offset amount of the center 700C of the processing tool 700 with respect to the center 23C of the pin member before processing (hereinafter referred to as the center offset amount), a plurality of A variety of pins can be machined. For example, in this embodiment, the cross section of the first type pin 231 is processed by setting the center offset amount as d1, and the end surface of the second type pin 232 is processed by setting the center offset amount to d2. are doing In this way, since the end faces of the pins 23 of a plurality of pairs can be machined using the same machining tool 700, the number of machining steps and cost associated with manufacturing the pins 23 can be reduced.

<Example 3>

Next, a third embodiment will be described. In this embodiment, by satisfying any one of the following four conditions, it becomes possible to evenly disperse the contact pitch pattern, and efficiently disperse the frequency of the collision sound generated by the contact between the pin 23 and the pulley. can make it In the following four conditional expressions, W represents the fin width (diameter) of the fin 23 .

・Condition 1

La1>(La2, Lb1, Lb2): La1≤W/2, La2=0, Lb1=La1/5, Lb2=2La1/5

When Condition 1 is satisfied when La1 = W/2, the difference in contact pitch is as shown in Table 1 below.

[Table 1]

・Condition 2

La1>(La2, Lb1, Lb2): La1≤W/2, La2=2La1/5, Lb1=La1/5, Lb2=0

When Condition 2 is satisfied when La1 = W/2, the difference in contact pitch is as shown in Table 2 below.

[Table 2]

・Condition 3

La2>(La1, Lb1, Lb2):La1=0, La2≤W/2, Lb1=2La2/5, Lb2=La2/5

When Condition 3 is satisfied when La2 = W/2, the difference in contact pitch is as shown in Table 3 below.

[Table 3]

・Condition 4

La2>(La1, Lb1, Lb2): La1=2La2/5, La2≤W/2, Lb1=0, Lb2=La2/5

When Condition 4 is satisfied when La2 = W/2, the difference in contact pitch is as shown in Table 4 below.

[Table 4]

In the above-described embodiment, the second, third, fifth and sixth surfaces 320, 330, 420 and 430, which are inclined surfaces, are formed by downward inclined planes, but are not limited thereto. All six surfaces (310, 320, 330, 410, 420, 430) may be formed by curved surfaces. In particular, in order to reduce the stress at the contact point between the pin and the pulley, the center-side ends 322 and 332 of the first type pin 231 of the second surface 320 and the third surface 330 forming the contact point. )/R processing may be applied to the end portions 422 and 432 on the center side of the second type pin 232 on the fifth surface 420 and the sixth surface 430. In this case, taking the first type pin 231 as an example, as shown in FIG. , 332) may be respectively subjected to R processing, or as shown in FIG.

In addition, in the embodiment described above, the first link 19 and the second link 20 were connected using two types of pins 231 and 232, but three or more types of pins having different cross-sectional shapes were used to connect the first link (19) and the second link 20 may be connected. Further, in the above-described embodiment, the cross-sectional shape of the pin 23 is changed to form a plurality of types of pins. For example, the cross-sectional shape or material of the pin is changed to form a plurality of types with different amounts of elastic deformation when tension is applied. It may be used by forming a pin of Further, in the above-described embodiment, the deflection direction of the plurality of pins 23 (the direction in which the pins become convex) has a plate configuration such that the upstream side and the downstream side of the chain travel direction are alternately repeated. For example, It is good also as a plate structure which repeats a pattern in which the upstream side continues twice and then becomes the downstream side once. As for the plate structure of the chain, any structure may be used. However, if the repetition period of the pin 23 in the deflection direction is long, the peak of the noise value can be dispersed over a wide range. Further, the cross-sectional shape of the pin may be the same, and only at least one of the elastic deformation amount of the pin and the bending direction of the pin may be changed to reduce the peak of the noise value.

In the above-described embodiment, the two types of pins 231 and 232 are randomly arranged, but each pin may be arranged at a specific position so that the peak of the noise value is reduced by using, for example, FFT analysis or the like. good night. For example, FFT analysis is performed on the excitation force waveform in time series according to the contact pitch pattern, and the frequency of the generated noise is analyzed, and the pattern having the smallest frequency peak may be employed. Further, in the embodiment described above, one pin is inserted into one pin hole, but, for example, two pins may be inserted into one pin hole. Although the above-mentioned embodiment was demonstrated as the chain for continuously variable transmission (CVT), it is not limited to this, You may apply this chain to other devices. In addition, the inventions described in the above-described embodiments may be combined in any way.

19: first link 20: second link
21: outer plate 22: inner plate
23: pin 13: chain
11, 12: pulley 231a: first pin
232a: second pin 232b: third pin
500, 510, 520: contact point P: chain pitch
X1: first offset amount X2: second offset amount

Claims (14)

A plurality of first and second links each having an outer plate and an inner plate disposed between the outer plates, and a plurality of pins alternately connecting the plurality of first and second links; As a chain that transmits power by frictional contact of the end face of the pin with the pulley,
The plurality of pins include a first pin, a second pin, and a third pin arranged in the traveling direction of the chain,
The chain pitch between the first pin and the second pin is the same as the chain pitch between the second pin and the third pin,
The offset amount between the center of the first pin and the contact point at which contact with the pulley in the end surface of the first pin starts is defined as a first offset amount, and contact with the pulley in the end surface of the second pin is A chain characterized in that, when an offset amount between a starting contact point and the center of the second pin is taken as the second offset amount, the first offset amount and the second offset amount are different. According to claim 1,
A chain characterized in that, when the distance between the contact points on the end faces of adjacent pins is taken as the contact pitch, the plurality of pins have four or more types of contact pitches each having a different distance. According to claim 1,
The cross section of the first pin is located upstream from the center of the first pin in the direction in which the chain travels, and the end at the center of the first pin is closer to the end than the end on the upstream side of the chain in the direction of travel of the first pin. Equipped with a first inclined surface inclined to be located outside in the axial direction,
The cross section of the second pin is located downstream of the center of the second pin in the direction in which the chain travels, and the end toward the center of the second pin is closer to the end than the end on the downstream side of the chain in the direction of travel of the second pin. Equipped with a second inclined surface inclined to be located outside in the axial direction,
A first distance between the center of the first fin and the end of the first slope on the center side of the first fin, and between the center of the second fin and the end of the second slope on the center side of the second fin A chain characterized in that the second distance of is different. According to claim 3,
Each of the outer plate and the inner plate has a pair of pin holes, and is configured such that one pin is inserted into each pin hole,
The cross section of the first pin is located downstream of the center of the first pin in the direction in which the chain travels, and the end toward the center of the first pin is closer to the end than the end on the downstream side of the chain in the direction of travel of the first pin. Equipped with a third inclined surface inclined to be located outside in the axial direction,
The cross section of the second pin is located upstream from the center of the second pin in the direction in which the chain travels, and the end at the center of the second pin is closer to the end than the end on the upstream side of the chain in the direction of travel of the second pin. Equipped with a fourth inclined surface inclined to be located outside in the axial direction,
A third distance between the center of the first fin and the center-side end of the first fin of the third inclined surface, and between the center of the second fin and the center-side end of the second fin of the fourth inclined surface A chain characterized in that the fourth distance of is different. According to claim 4,
A chain, characterized in that the first to fourth distances are different distances. According to claim 4,
A chain, characterized in that the sum of the first distance and the third distance is equal to the sum of the second distance and the fourth distance. According to claim 4,
When the first distance is La1, the third distance is La2, the second distance is Lb1, the fourth distance is Lb2, and the diameters of the first and second pins are W, the following equation is satisfied. Chain characterized by:
La1>(La2, Lb1, Lb2): La1≤W/2, La2=0, Lb1=La1/5, Lb2=2La1/5 According to claim 4,
When the first distance is La1, the third distance is La2, the second distance is Lb1, the fourth distance is Lb2, and the diameters of the first and second pins are W, the following equation is satisfied. Chain characterized by:
La1>(La2, Lb1, Lb2): La1≤W/2, La2=2La1/5, Lb1=La1/5, Lb2=0 According to claim 4,
When the first distance is La1, the third distance is La2, the second distance is Lb1, the fourth distance is Lb2, and the diameters of the first and second pins are W, the following equation is satisfied. Chain characterized by:
La2>(La1, Lb1, Lb2):La1=0, La2≤W/2, Lb1=2La2/5, Lb2=La2/5 According to claim 4,
When the first distance is La1, the third distance is La2, the second distance is Lb1, the fourth distance is Lb2, and the diameters of the first and second pins are W, the following equation is satisfied. Chain characterized by:
La2>(La1, Lb1, Lb2): La1=2La2/5, La2≤W/2, Lb1=0, Lb2=La2/5 According to any one of claims 3 to 10,
The contact point at which the contact with the pulley at the end face of the first pin starts is at the center side of the first pin on the first inclined surface, rather than the end of the end face of the first pin on the upstream side in the direction of chain movement. is located in
The contact point at which the contact with the pulley at the end face of the second pin starts is located at the center of the second pin on the second inclined plane from the end of the end face on the downstream side in the direction of travel of the chain in the end face of the second pin. Chain characterized in that located on the side. According to any one of claims 3 to 10,
A chain characterized in that R processing is applied to an end of the first pin on the center side of the first inclined surface and an end of the second pin on the center side of the second inclined surface. According to claim 1,
A chain, characterized in that the cross-sectional shapes of the first and second pins are each asymmetrical. According to claim 1,
The first pin and the second pin are different in at least one of the deflection amount and the deflection direction when a predetermined tension is applied to the chain.

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