JP5981490B2 - chain - Google Patents

Description

  The present invention relates to a chain that transmits power and reduces noise.

  2. Description of the Related Art A chain that is spanned between sprockets and transmits power and in which plates having teeth are stacked is known. In such chains, so-called silent chains that are configured to reduce noise by reducing the torque fluctuation between the teeth and the sprocket are arranged in parallel with a plurality of chains whose teeth are out of phase. Are known.

  Patent Document 1 discloses a timing chain system for an engine constituted by a sprocket offset by 1/2 pitch and a chain having inward teeth.

Japanese Patent Laid-Open No. 07-167232

  The timing chain described in Patent Document 1 is configured by connecting a link having a pair of holes and a toe portion that meshes with the teeth of the sprocket, and changes the phase by offsetting the position of the toe portion with respect to the hole doing.

  In the timing chain having such a configuration, there is a possibility that the driving radius with the sprocket changes due to the positional relationship between the pair of holes and the toe portion to cause torque fluctuations, resulting in noise and vibration.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a chain that connects a toothed plate and suppresses torque fluctuation and reduces noise in the chain.

According to an aspect of the present invention, the link plate includes: a link plate having a first through hole and a first foot; and a side plate having a second through hole and a first fixing portion; The first chain, which is endlessly connected to the side plate by a pin that connects the first through hole and the second through hole, the link plate and the side plate are the first through hole and the second through hole. And a second chain configured to be endless by being connected by a pin that connects the through-holes, and the first fixing portion is opposite to the first foot portion of the link plate adjacent to the side plate. It is formed projecting from the side, with the first chain and the second chain is disposed in parallel to the first fixing portion of the first chain and the first fixing portion of the second chain The connecting member is fixed, and the first chain is connected by the connecting member. When the second chain, characterized in that it is connected by the connecting member.

  According to the above aspect, since the first chain and the second chain are connected by the connecting member, a double-row chain that is offset from each other is formed, and fluctuations in driving torque applied to the sprocket are suppressed. Noise can be reduced.

It is explanatory drawing of the chain 1 of the 1st Embodiment of this invention. It is explanatory drawing of the chain 1 of the 1st Embodiment of this invention. It is explanatory drawing of the chain 1 of the modification of 1st Embodiment of this invention. It is explanatory drawing of the chain 1 of the modification of 1st Embodiment of this invention. It is explanatory drawing of the chain 1 of the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The chain 1 according to the embodiment of the present invention reduces the noise generated between the chain and the sprocket by connecting a link plate having teeth and sliding the tooth and the sprocket while meshing to transmit the driving torque. It is configured as a so-called silent chain. Details will be described below.

<First Embodiment>
FIG. 1 is an explanatory diagram of the chain 1 according to the first embodiment of the present invention, and is a top view of the chain 1.

  The chain 1 is formed by bundling three sets of chains 1 (1a, 1b, 1c) shifted by 1/3 pitch into one by a thin plate-like connecting member 50. The three sets of chains 1a, 1b, and 1c transmit power by meshing with sprockets (not shown).

  As shown in FIG. 1, the chain 1 is configured such that a chain 1b is sandwiched between a chain 1a and a chain 1c.

  The chains 1 a, 1 b, and 1 c are configured by connecting a plurality of link plates 10 and support plates 21 and 22 or side plates 24 by pins 30.

  In the chain 1a, a plurality of link plates 10 are laminated, and a side plate 24 is provided on one side of the laminated link plate 10 and a support plate 21 is provided on the other side. The plurality of link plates 10 sandwiched between the side plate 24 and the support plate 21 are fixed by a pin 30 so as to be swingable about the axis of the pin 30.

  In the chain 1b, a plurality of link plates 10 are laminated, and support plates 22 are provided on both side surfaces of the laminated link plates 10. The plurality of link plates 10 sandwiched between the support plates 22 are fixed by pins 30 so as to be swingable about the axis of the pins 30.

  As with the chain 1a, the chain 1c includes a plurality of link plates 10 laminated, and a support plate 21 is provided on one side of the laminated link plate 10 and a side plate 24 is provided on the other side. The plurality of link plates 10 sandwiched between the support plate 21 and the side plate 24 are fixed by a pin 30 so as to be swingable about the axis of the pin 30.

  The chains 1a, 1b, and 1c are connected endlessly and arranged in parallel. By fixing the connecting member 50 in the fixing groove 121 provided in the support plate 21, the fixing groove 141 provided in the support plate 22, and the fixing groove 125 provided in the side plate 24, the chains 1a, 1b, 1c are mutually connected. They are linked while maintaining the offset position.

  FIG. 2 is an explanatory diagram of the chain 1 of the present embodiment, and is an explanatory diagram of the link plate 10, the support plates 21 and 22, and the side plate 24.

  The link plate 10 includes two foot portions 11a and 11b that mesh with the sprocket and two through holes 12a and 12b through which the pins 30 pass.

  In the chain 1a, 1b, 1c of this embodiment, one through hole 12 of the four link plates 10 and the other through hole 12 of the three link plates 10 are connected by a pin 30, and these are mutually connected. Composed by connecting.

  The support plate 21 includes a fixing groove 121, two foot portions 122a and 122b that mesh with the sprocket, and two through holes 124a and 124b through which the pin 30 passes.

  The support plate 22 includes a fixing groove 141, two foot portions 142a and 142b that mesh with the sprocket, and two through holes 144a and 144b through which the pin 30 passes.

  The side plate 24 includes a fixing groove 125 and two through holes 126a and 126b.

  The fixed groove 121 of the support plate 21 and the fixed groove 125 of the side plate 24 are offset from the fixed groove 141 of the support plate 22 by 1/3 pitch, respectively.

  Since the chain 1b is sandwiched between the two support plates 22, the offset of the fixing groove 141 in the chain 1b is zero.

  On the other hand, since the chain 1b is sandwiched between the side plate 24 and the support plate 21, the offset of the fixing groove 121 and the fixing groove 125 with respect to the two fixing grooves 141 of the chain 1b is 1/3 pitch.

  Similarly, since the chain 1c is sandwiched between the side plate 24 and the support plate 21, the offset of the fixed groove 121 and the fixed groove 125 with respect to the two fixed grooves 141 of the chain 1b is 1/3 pitch.

  Furthermore, since the attachment of the side plate 24 and the support plate 21 in the chain 1a and the attachment of the side plate 24 and the support plate 21 in the chain 1c are reversed, the offset between the chain 1a and the chain 1 is 1/3 pitch. The offset between the chain 1a and the chain 1c is a 2/3 pitch offset further advanced by 1/3 pitch.

  With such a configuration, the chain 1 is configured as a double-row chain in which the chains 1a, 1b, and 1c are offset by 1/3 pitch.

  Each of the chains 1a, 1b, and 1c meshes with teeth formed on the sprocket at every 1/3 pitch. Therefore, since the positional relationship between the chains 1a, 1b, and 1c is determined by the sprocket, the strength of the connecting member 50 that fixes the chains 1a, 1b, and 1c to each other may be low.

  The connecting member 50 is made of an elastic resin or metal material. When the chain 1 is transmitting power, vibration and deflection occur between the chains 1a, 1b, and 1c. The chains 1a, 1b, and 1c are fixed to each other by the connecting member 50 having elasticity. In particular, the connecting member 50 suppresses vibration and deflection between the chains 1a, 1b, and 1c by fixing the chains 1a, 1b, and 1c with a slight gap.

  As described above, in this embodiment, the chain 1a (first chain, third chain), the chain 1b (fourth chain), and the chain 1c (second chain, fifth chain) are arranged in parallel. At the same time, each fixing groove is fixed by the connecting member 50.

  In the chain 1a, the link plate 10 having two legs 11a and 11b (first legs) and two through holes 12a and 12b (first through holes) has a fixing groove 125 (first fixing). Part), a side plate 24 having two through holes 126a and 126b (second through holes), a fixing groove 121 (second fixing part), and two legs 122a and 122b (second legs). Part) and a support plate 21 having two through holes 124a and 124b (third through holes).

  In the chain 1b, the link plate 10 includes a fixing groove 141 (second fixing portion), two foot portions 142a and 142b (second foot portion), and two through holes 144a and 144b (third through holes). ) And is sandwiched on both sides.

  The chain 1 c is configured such that the link plate 10 is sandwiched between the support plate 21 and the side plate 24.

  As described above, in the chain 1 of the present embodiment, the chains 1a, 1b, and 1c are fixed by the connecting members 50 with the fixing portions (121, 141, and 125) included in the support plates 21 and 22 and the side plate 24. Thus, the chains 1a, 1b, and 1c can be fixed in a state where they are offset at a predetermined pitch interval. This effect corresponds to claim 2.

  With such a configuration, the driving torque applied to the chain 1 that meshes with the sprocket can be dispersed by the plurality of chains 1a, 1b, and 1c. Therefore, fluctuations in the driving torque are suppressed, and vibration and noise can be reduced. By reducing vibration and noise, the torque transmitted by the chain 1 can be increased. This effect corresponds to claims 1 and 5.

  Since the connecting member 50 is a thin plate and is made of an elastic member, the shape of the chain 1 does not increase. This effect corresponds to the third aspect.

  Next, the modification of the chain 1 of this embodiment is demonstrated.

  3 and 4 are explanatory diagrams of the chain 1 according to a modification of the present embodiment. FIG. 3 is a top view of the chain 1 and FIG. 4 is a perspective view of the chain 1. In the modification shown in FIGS. 3 and 4, the chain 1 is configured such that the chain 1 d and the chain 1 e are arranged in parallel and shifted by ½ pitch.

  In the chain 1d, a plurality of link plates 10 are laminated, and side plates 24 are provided on both sides of the laminated link plates 10. The plurality of link plates 10 sandwiched between the pair of side plates 24 are fixed by pins 30 so as to be swingable about the axis of the pins 30.

  Like the chain 1d, the chain 1e has a plurality of link plates 10 stacked, and side plates 24 are provided on both sides of the stacked link plates 10. The plurality of link plates 10 sandwiched between the pair of side plates 24 are fixed by pins 30 so as to be swingable about the axis of the pins 30. These chains 1d and 1e are connected endlessly.

  The side plates 24 provided on both sides of the chain 1d and the side plates 24 provided on both sides of the chain 1e are attached with the front and back reversed. The fixed groove 125 in the chain 1d and the fixed groove 125 in the chain 1e are arranged so as to be shifted from each other by ½ pitch. The fixing grooves 125 are fixed to each other by the connecting member 50.

  With such a configuration, the chain 1 has a double row chain that is offset from each other because the chain 1d (first chain) and the chain 1e (second chain) are connected by an elastic connecting member. And the fluctuation of the meshing torque with the sprocket is suppressed, and noise can be reduced.

  Next, the chain 1 according to the second embodiment of the present invention will be described.

Second Embodiment
FIG. 5 is an explanatory diagram of the chain 1 according to the second embodiment of the present invention.

  In the second embodiment, a method of fixing three sets of chains 1 (1a, 1b, 1c) is different from the first embodiment. In addition, the same code | symbol is attached | subjected to the structure same as 1st Embodiment, and the description is abbreviate | omitted.

  In the second embodiment, the chain 1a includes a side plate 44 in which the link plate 10 includes a fixing hole 225 (first fixing portion) and two through holes 226a and 226b (second through holes). A support plate 41 having a fixing hole 221 (second fixing portion), two foot portions 222a and 222b (second foot portion), and two through holes 224a and 224b (third through holes). It is configured to be sandwiched.

  In the chain 1b, the link plate 10 includes a fixing hole 241 (second fixing portion), two foot portions 242a and 242b (second foot portion), and two through holes 244a and 244b (third through hole). ) And is sandwiched on both sides.

  The chain 1 c is configured such that the link plate 10 is sandwiched between a support plate 41 and a side plate 44.

  The connecting pin 60 passes through the fixing hole 221 of the support plate 41, the fixing hole 241 of the support plate 42, and the fixing hole 225 of the side plate 44, and fixes them together. The connecting pin 60 is formed of a material having elasticity of metal or resin. By fixing these with the connecting pin 60 having elasticity, vibration and bending between them are suppressed.

  With such a configuration, the chain 1 of the second embodiment is fixed so that the chains 1a, 1b, and 1c are provided on the support plates 41 and 42 and the side plate 44, similarly to the chain of the first embodiment shown in FIG. By fixing the portions (fixing holes 221, 241, 225) with the connecting member (connecting pin 60), it is possible to fix the parts in an offset state at a predetermined pitch interval.

  In the second embodiment, in particular, the connection between the support plates 41 and 42 and the side plate 44 is fixed by the connecting pin 60, so that the connecting pin 60 is less likely to come off than the connecting member 50 of the first embodiment, and the chain 1 durability can be improved. This effect corresponds to claim 4.

  The embodiment of the present invention has been described above, but the above embodiment is merely a part of an application example of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.

  In the present embodiment, a double-row chain arranged in parallel in two or three rows has been described as an example, but a double-row chain of four or more rows may be used. In this case, the pitch is set to be shifted according to the number of columns.

1 Chain 1a, 1b, 1c Chain 1d, 1e Chain 10 Link plate 11a, 11b Foot 12a, 12b Through hole 21, 22, 41, 42 Support plate 24, 44 Side plate 30 Pin 50 Connection member 60 Connection pin

Claims (5)

A link plate having a first through hole and a first foot,
A side plate having a second through hole and a first fixing portion;
With
A first chain configured endlessly by the link plate and the side plate being connected by a pin connecting the first through hole and the second through hole;
The link plate and the side plate are connected by a pin connecting the first through hole and the second through hole, and a second chain configured in an endless shape is configured,
The first fixing portion is formed so as to protrude on the side opposite to the first foot portion of the link plate adjacent to the side plate,
The first chain and the second chain are arranged in parallel, and a connecting member is connected to the first fixing portion of the first chain and the first fixing portion of the second chain. A chain that is fixed and that connects the first chain and the second chain by the connecting member . The chain according to claim 1,
Wherein the first of said first fixed portion and the first fixing portion of the second chain of the chain, the chain, characterized in that it is arranged to be offset by a predetermined pitch. The chain according to claim 1 or 2,
The connecting member is a flat plate and is made of an elastic member. The chain according to any one of claims 1 to 3,
The first fixing portion is configured by a third through hole that penetrates the side plate,
The connecting member is formed of an elastic member and is fixed through the third through hole. A link plate having a first through hole and a first foot,
A side plate having a second through hole and a first fixing portion;
A support plate having a third through hole, a second foot portion, and a second fixing portion ;
The link plate, the side plate, and the support plate are connected to each other by a pin that connects the first through hole, the second through hole, and the third through hole. Chain,
A fourth chain configured endlessly by the link plate and the support plate being connected by a pin connecting the first through hole and the third through hole;
The link plate, the side plate, and the support plate are connected to each other by a pin that connects the first through hole, the second through hole, and the third through hole . A chain,
The first fixing portion and the second fixing portion are formed so as to protrude on the side opposite to the first foot portion of the link plate adjacent to the side plate,
The third chain , the fourth chain, and the fifth chain are arranged in parallel, and the first and second fixing portions of the third chain and the fourth chain A connecting member is fixed to the second fixing portion of the first chain and the first fixing portion and the second fixing portion of the fifth chain, and the third chain and the fourth chain are fixed by the connecting member. And the fifth chain is connected.

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