JP2014181787A - Silent chain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a silent chain which can prevent the generation of local friction of a connecting pin by a simple constitution, reduce vibration and noise, and can suppress tooth jump and an error of timing.SOLUTION: A silent chain has connecting pins 130 which connect first link plates 111 of a first link row 101 and second link plates 121 of second link rows 102 which are alternately arranged in a traveling direction so as to be bendable, and guide plates 112 which are fitted and fixed to both end sides of the connecting pins 130. The guide plates 112 are independently arranged at the respective connecting pins 130.

Description

  The present invention relates to a silent chain wound between a pair of spaced apart sprockets for transmitting power from a driving side sprocket to a driven side sprocket.

  2. Description of the Related Art Conventionally, a silent chain is wound between a pair of spaced apart sprockets and transmits power from a driving side sprocket to a driven side sprocket. A second link row composed of the second link plates described above, a first link row arranged alternately in the traveling direction, a first link plate of the second link row, and a connecting pin that connects the second link plate in a bendable manner; What has the guide plate fitted and fixed to the both ends of the connecting pin is known.

  As shown in FIGS. 12 to 14, for example, the known silent chain 500 includes a first link row 501 including one or more (three in the illustrated example) first link plates 511 and two or more (the illustrated example). 4) second link plates 521, and first link rows 501 and second link plates 521 of first link rows 501 and second link rows 502 arranged alternately in the traveling direction. Are connected to both end portions of two adjacent connection pins 530. The guide plates 512 arranged on both outer sides in the width direction of the first link row 501 are connected to each other. Has been.

As a result, the connecting pin 530 is prevented from coming off, and the first link plate 511 and the second link plate 521 slide smoothly and come into contact with each other so as not to rattle.
The guide plate 512 is configured to extend outward in the width direction of the sprocket teeth when the silent chain 500 engages with a sprocket (not shown), and the silent chain 500 accurately engages with the sprocket. (See Patent Document 1 etc.).

Japanese Patent No. 3035206 Japanese Patent No. 3235790

However, in such a known silent chain 500, since the two connecting pins 530 adjacent to the guide plate 512 are fitted and fixed, when the second link plate 521 repeatedly bends, The same place always slides with the second link plate 521, and there is a problem that local wear occurs.
When local wear occurs on the connecting pin 530, the chain pitch becomes long, and there is a problem that vibration and noise increase when engaged with the sprocket, and tooth skipping occurs and timing is erroneous.

In addition, the connecting pin is rotatably fitted to the guide plate, and is fitted and fixed to the outer pin fixing bracket of the guide plate to prevent the connecting pin from rotating, thereby enabling each connecting pin to be rotated. It is publicly known (see Patent Document 2 etc.).
However, in such a known silent chain, even if the individual connecting pins are rotatable, the connecting pins are not actively rotated when the silent chain is used, and the same location of the connecting pins is still present. There was a problem that local wear occurred because the first link plate and the second link plate always slide.

  The present invention solves these problems, and with a simple configuration, it prevents local wear of the connecting pin, reduces vibration and noise, and suppresses tooth skipping and timing errors. It is intended to provide a silent chain that can be used.

  According to the first aspect of the present invention, the first link row composed of one or more first link plates and the second link row composed of two or more second link plates, and the first link row arranged alternately in the traveling direction. A silent chain having a connection pin that bendably connects a first link plate of one link row and a second link plate of a second link row, and guide plates that are fitted and fixed to both ends of the connection pin. The above-described problem is solved by providing the guide plate independently for each connecting pin.

The invention according to claim 2 solves the above-mentioned problem by the fact that the guide plate has a disk shape in addition to the configuration of the silent chain according to claim 1.
According to a third aspect of the present invention, in addition to the configuration of the silent chain according to the second aspect, the guide plate includes the one having an outer diameter end surface protruding from the back surface of the link plate, thereby solving the problem. Is.
In addition to the structure of the silent chain according to claim 2 or claim 3, the invention according to claim 4 includes a guide plate having a large-diameter guide plate and a small-diameter guide plate having a smaller diameter than the large-diameter guide plate. The large-diameter guide plate is fitted and fixed to one end side in the width direction of the connecting pin, and the small-diameter guide plate is fixed to the other end side. The large-diameter guide plate and the small-diameter guide plate are configured to be alternately arranged in the traveling direction, thereby solving the above-described problem.
According to the fifth aspect of the present invention, in addition to the configuration of the silent chain according to any one of the first to third aspects, the guide plate fitted and fixed to the width direction end of the adjacent connecting pin has a width. The problem is solved by being alternately arranged at positions shifted in the direction.

According to the silent chain according to the first aspect of the present invention, since the guide plate is provided independently for each connecting pin, each connecting pin can be rotated together with the guide plate, and the guide plate is When the silent chain travels on the chain guide or engages with the sprocket, it slides or rolls on the outer side of the chain guide or the sprocket teeth in the width direction and actively rotates.
As a result, the connecting pin actively rotates together with the guide plate, and the same location of the connecting pin does not slide with the first link plate and the second link plate during use, thereby preventing local wear. Thus, an increase in the chain pitch is suppressed, vibration and noise during engagement with the sprocket are reduced, and tooth skipping and timing errors are prevented.

According to the second aspect of the present invention, since the guide plate has a disk shape, the guide plate rotates more smoothly, and local wear of the connecting pin is further prevented.
According to the third aspect of the present invention, since the guide plate has the outer diameter end surface protruding from the back surface of the link plate, the guide plate is securely connected to the chain guide or the like when the silent chain runs on the chain guide. Therefore, it is possible to prevent the local wear of the connecting pin more reliably.
Also, when the rear side of the silent chain slides with the chain guide, the guide plate can run with the width direction outer side of the sliding surface of the chain guide, so the chain guide width must be reduced. Can do.

According to the fourth aspect of the present invention, when the sprocket is engaged with the large-diameter guide plate, it is possible to enlarge the portion extending outward in the width direction of the sprocket teeth, and the shape of the teeth of the silent chain. In addition, it is possible to sufficiently ensure the function as a guide for accurately engaging the sprocket, and the guide plate is used when the silent chain travels on the chain guide or engages the sprocket. The connecting pin can be rotated by sliding or rolling with the outer side of the chain guide or the sprocket teeth in the width direction to rotate more reliably.
In addition, since the large-diameter guide plate and the small-diameter guide plate are alternately arranged in the traveling direction on each end side of the adjacent coupling pins, all the coupling pins can be reliably rotated. .
According to the configuration of the fifth aspect of the present invention, the guide plates fitted and fixed to the end portions in the width direction of the adjacent connecting pins are alternately arranged at positions shifted in the width direction, so that all the guides are arranged. It is possible to sufficiently ensure the function as a guide for accurately engaging the sprocket, regardless of the shape of the teeth of the silent chain, while reducing the number of component parts with a large diameter plate.
Further, rotation is transmitted even when adjacent guide plates slide in contact with each other, and all the guide plates can be positively rotated to rotate the connecting pins.

The partial perspective view of the silent chain which concerns on 1st Embodiment of this invention. The partial side view of the silent chain which concerns on 1st Embodiment of this invention. The partial top view of the silent chain which concerns on 1st Embodiment of this invention. Sectional drawing explanatory drawing when the silent chain which concerns on 1st Embodiment of this invention drive | works on the chain guide. The partial side view of the silent chain which concerns on the modification of 1st Embodiment of this invention. The partial top view of the silent chain which concerns on the modification of 1st Embodiment of this invention. The partial side view of the silent chain which concerns on 2nd Embodiment of this invention. The partial top view of the silent chain which concerns on 2nd Embodiment of this invention. Sectional drawing explanatory drawing when the silent chain which concerns on 2nd Embodiment of this invention drive | works on the chain guide. The partial side view of the silent chain which concerns on the modification of 2nd Embodiment of this invention. The partial top view of the silent chain which concerns on the modification of 2nd Embodiment of this invention. The partial perspective view of the conventional silent chain. The partial side view of the conventional silent chain. The partial top view of the conventional silent chain.

The silent chain of the present invention includes a first link row made up of one or more first link plates and a second link row made up of two or more second link plates, and first link rows arranged alternately in the traveling direction. A silent chain having a connecting pin for connecting the second link plate of the second link row and the second link plate of the second link row so as to be bendable, and a guide plate fitted and fixed to both ends of the connecting pin, Provided independently for each connecting pin, with a simple configuration, it prevents local wear of the connecting pin, reduces vibration and noise, and suppresses tooth skipping and timing errors If possible, the specific configuration may be any.
The number of the first link plate of the first link row and the second link plate of the second link row may be any number, and the thickness of the first link plate and the second link plate may be the same or different, The plurality of first link plates may include different thicknesses, and the plurality of second link plates may include different thicknesses.
Further, the first link plate of the first link row and the second link plate of the second link row may be alternately arranged one by one in the width direction, or may be arranged not alternately.

A silent chain 100 according to a first embodiment of the present invention will be described with reference to the drawings.
In the silent chain 100 according to the first embodiment of the present invention, as shown in FIGS. 1 to 3, the first link row 101 includes three first link plates 111, and the second link row 102 includes four pieces. The first link plate 111 of the first link row 101 and the second link plate 121 of the second link row 102 which are composed of the second link plate 121 and are alternately arranged in the traveling direction are alternately arranged one by one in the width direction. Thus, the connecting pins 130 are connected to bendable.

The guide plate 112 is fitted and fixed independently at each end of the connecting pin 130 in the width direction for each connecting pin 130 to prevent it from coming off, and each connecting pin 130 is configured to be freely rotatable. .
The guide plate 112 is formed in a disc shape and extends outward in the width direction of the sprocket teeth when the first link plate 111 and the second link plate 121 engage with the sprocket (not shown) as shown in FIG. It has an outer diameter and guides the silent chain 100 to engage the sprocket accurately.

  According to the silent chain 100 configured as described above, the individual connecting pins 130 are configured to be rotatable together with the guide plate 112, so that the rear surface of the silent chain 100 is on the chain guide G as shown in FIG. When the guide plate 112 slides on the outer side in the width direction of the chain guide G or rolls with the running surface of the chain guide G and actively rotates, the connection pin 130 rotates, and the connection pin 130 rotates. The same part of 130 does not slide with the first link plate 111 and the second link plate 121.

As a result, the occurrence of local wear of the connecting pin 130 is prevented, the chain pitch is prevented from becoming longer due to the wear, vibration and noise during engagement with the sprocket are reduced, and tooth skipping is achieved. And timing errors are prevented.
In this embodiment, the guide plate 112 has a disk shape. However, as the guide plate, the guide pin 112 can prevent the connection pin from coming off and can be engaged with the sprocket. It may be a polygonal shape or any other shape that can rotate integrally with the connecting pin.

Further, as shown in FIGS. 5 and 6, a small-diameter guide plate 114 that only prevents the connection pin 130 from being detached is fitted and fixed to one end portion in the width direction of each connection pin 130, and adjacent connection pins 130 are connected. You may comprise so that the edge part by which this small diameter guide plate 114 of the pin 130 was fixed by fitting might become reverse alternately.
As a result, the small-diameter guide plate 114 does not slide with the chain guide G or the sprocket teeth, so that the sliding resistance can be reduced, and vibration and noise during engagement with the sprocket are further reduced.

  As shown in FIGS. 7 and 8, the silent chain according to the second embodiment of the present invention is a small-diameter guide that only prevents the connecting pin 130 from coming off at one end in the width direction of each connecting pin 130. The plate 114 is fitted and fixed, and a large-diameter guide plate 113 having outer diameter end surfaces protruding from the back surfaces of the first link plate 111 and the second link plate 121 is fitted and fixed to the other end, and adjacent connecting pins The end portions of the 130 large-diameter guide plates 113 fitted and fixed are alternately reversed, and the other configurations are the same as those of the silent chain 100 according to the first embodiment described above ( The reference numerals in the figure are the same as those in the first embodiment.)

According to the silent chain in the present embodiment, the same operation and effect as the silent chain 100 in the first embodiment are exhibited, and the large-diameter guide plate 113 protrudes from the back surfaces of the first link plate 111 and the second link plate 121. By having the outer diameter end surface, as shown in FIG. 9, the large diameter guide plate 113 can travel while defining the outer side in the width direction of the sliding surface of the chain guide G. Can be reduced.
Further, since the large-diameter guide plate 113 projects greatly outward in the width direction of the sprocket teeth, it is possible to reliably guide the engagement with the sprocket.

Also, as shown in FIGS. 10 and 11, large-diameter guide plates 113 are fitted and fixed to adjacent coupling pins 130 by fitting and fixing large-diameter guide plates 113 to both ends in the width direction of all the coupling pins 130. You may comprise so that 113 may be alternately arrange | positioned in the position shifted | deviated to the width direction.
This ensures that all guide plates are large-diameter guide plates 113 while reducing the number of components and ensuring the function as a guide for accurately engaging the sprocket regardless of the shape of the teeth of the silent chain. It becomes possible to do.
Further, the rotation is transmitted also when the adjacent large-diameter guide plates 113 are in contact with each other, and all the large-diameter guide plates 113 can be positively rotated to rotate the connecting pins 130.

  Each embodiment described above is a specific example of the silent chain according to the present invention, but the silent chain according to the present invention is not limited thereto, and the shape, position, dimension, arrangement relationship, etc. of each component member Various modifications are possible.

100, 500 ... Silent chain 101, 501 ... First link row 102, 502 ... Second link row 111, 511 ... First link plate 112, 512 ... Guide plate 113 ... Large diameter guide plate 114 ... Small diameter plates 121, 521 ... Second link plates 130, 530 ... Connecting pins

Claims (5)

A first link row comprising one or more first link plates and a second link row comprising two or more second link plates; and the first link plates of the first link row arranged alternately in the traveling direction; A silent chain having a connecting pin for connecting the second link plate of the second link row so as to be bendable, and a guide plate fitted and fixed to both ends of the connecting pin;
The silent chain, wherein the guide plate is provided independently for each connecting pin.   The silent chain according to claim 1, wherein the guide plate has a disk shape.   The silent chain according to claim 2, wherein the guide plate includes a guide plate having an outer diameter end surface protruding from a back surface of the link plate. The guide plate comprises a large diameter guide plate and a small diameter plate having a smaller diameter than the large diameter guide plate,
The large-diameter guide plate is fitted and fixed to one end side in the width direction of the connecting pin, and the small-diameter guide plate is fixed to the other end side.
4. The structure according to claim 2, wherein the large-diameter guide plate and the small-diameter guide plate are alternately arranged in the traveling direction on each end side of adjacent connecting pins. 5. Silent chain.   4. The guide plate fitted and fixed to the width direction end of the adjacent connecting pin is alternately arranged at a position shifted in the width direction. 5. The silent chain described.

Images