JP4573621B2 - Variable speed transmission chain - Google Patents

Description

  The present invention relates to a variable speed transmission chain used in a power transmission device such as a continuously variable transmission, and more particularly to a variable speed transmission chain that suppresses contact noise of the chain itself.

  Conventionally, a variable speed transmission chain is wound between a driving pulley and a driven pulley each having a pair of conical sheaves, each of which has a stepless change in groove width, and is formed in a V-shape formed between the sheaves. By changing the groove width, the winding radius is changed, and the rotation speed ratio between the driving pulley and the driven pulley, that is, the gear ratio is continuously changed continuously.

  Therefore, such a conventional variable speed transmission chain has a hole through which both the protruding shafts of the chain link plate connecting pin are inserted, and a space for inserting the chain link plate is formed in the center, and both outer side surfaces are formed. There is a friction transmission chain in which a friction transmission V block having a V-shaped friction transmission surface is mounted with a connecting pin (see Patent Document 1).

Also, the joint surfaces of the pair of U-shaped strut pieces that enclose the power transmission chain from both sides and the protruding ends of the chain pins are fitted and the outer surfaces of which are friction contact surfaces with the V pulley are welded by spot welding with a laser beam. There is also a friction transmission chain (see Patent Document 2).
JP 61-10142 A Japanese Patent Application Laid-Open No. 61-286539

  However, in the above-described variable speed transmission chain, since there is a gap between the V block and the V block or between the V block and the connecting pin, the V block and the connecting pin are rattled by vibration during driving. There is a problem in that contact noise between parts called sound is generated and noise increases.

  Therefore, the technical problem to be solved by the present invention, that is, the object of the present invention is to mount a frame-like block body that is variable in speed by displacing in the radial direction of the conical sheave on the link unit having the connecting hole for inserting the connecting pin. Another object of the present invention is to provide a variable speed transmission chain in which transmission noise is reduced by suppressing contact noise between a frame-shaped contact member and a connecting pin due to rattling of parts constituting the chain.

  The present invention is mounted with a frame-shaped block body that is wound between a drive pulley and a driven pulley having a pair of conical sheaves that are inwardly directed to each other, and that is displaced in the radial direction of the conical sheave and is variable in speed. In a variable speed transmission chain in which a number of link units are connected to each other by connecting pins in the longitudinal direction of the chain, the link unit has a long hole for inserting a connecting pin and a plurality of link plates arranged in the width direction of the chain. The frame-shaped block body includes a frame-shaped contact member that contacts the conical sheave, and a vibration-damping buffer member interposed between the frame-shaped contact member and the connecting pin, and the vibration-damping buffer member The frame-shaped contact member that makes contact with and presses the end of the connecting pin protruding from the link unit and simultaneously contacts the back side of the damping buffer member is connected to the other connecting pin. By being mounted so as to press toward the is obtained by solving the problems described above.

The present invention is a frame-shaped abutting member in which the above-mentioned link unit has a connecting pin insertion long hole and is composed of a plurality of link plates arranged in the chain width direction, and the frame-shaped block body abuts on the conical sheave. And a damping buffer member interposed between the frame-shaped contact member and the connecting pin, and the damping buffer member comes into contact with and presses the end of the connecting pin protruding from the link unit. At the same time, by mounting the frame-like abutting member that abuts the back side of the damping buffer member against the other connecting pin, the following specific effects are achieved. .
That is, the link unit unique to the present invention has a long hole for connecting pin insertion, and the frame-shaped block body abuts on the conical sheave and the frame-shaped contact member and the connection pin. Since the vibration-damping member is driven by the vibration-damping buffer member, the vibration of the parts such as the frame-shaped block body and the connecting pin is reduced. Contact noise between the frame-shaped contact member and the connecting pin due to rattling is suppressed, and transmission noise can be reduced.
Then, the damping buffer member contacts and presses so as to push in the end of the connecting pin protruding from the link unit, and at the same time, the frame-like contact member that contacts the back side of the damping buffer member is connected to the other Since it mounts | wears so that it may press toward a pin, a frame-shaped block body can be mounted | worn in a state without a clearance gap between the connection pins arrange | positioned at the connection pin insertion long hole.

An embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is a usage pattern diagram of a variable speed transmission chain according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. FIG. 4 is a perspective view showing a part of a variable speed transmission chain according to an embodiment of the present invention, and FIG. 5 is an assembly / disassembly of the frame-shaped block body shown in FIG. 6 is a modification of the frame-shaped block body shown in FIG. 5, and FIG. 7 is a further modification of the frame-shaped block body shown in FIG.

  First, a variable speed transmission chain 100 according to a first embodiment of the present invention includes a driving pulley D having a pair of conical sheaves D1 and D1 that are inwardly directed to each other, as shown in FIGS. Like the pulley D, the pulley D is hung between a pair of conical sheaves R1 and R1 that are inwardly directed to each other, and each of the drive pulley D and the driven pulley R is connected to each other. A large number of link units 120 having frame-shaped block bodies 110 that are displaced in the radial direction and variable in speed are connected to each other by connecting pins 130 in the longitudinal direction of the chain.

  That is, in the variable speed transmission chain 100 of the present embodiment, both side surfaces of the frame-shaped block body 110 sequentially contact the conical sheaves D1, D1 of the driving pulley D and the conical sheaves R1, R1 of the driven pulley R, The friction generated between them transmits the rotation on the driving pulley D side to the driven pulley R side, and is formed between the pair of conical sheaves D1 and D1 and the pair of conical sheaves R1 and R1, respectively. By changing the width of the V-shaped groove, the winding radius of the variable speed transmission chain 100 changes steplessly between the position indicated by the one-dot chain line and the position indicated by the two-dot chain line in FIG. The rotation speed ratio between the driving pulley D and the driven pulley R, that is, the gear ratio is continuously changed continuously.

As shown in FIG. 5, the frame-shaped block body 110 includes three frame-shaped contact members 111 and one vibration-damping buffer member 112.
The frame-shaped abutting member 111 has a link insertion opening 111a for inserting the link unit 120 at a central portion thereof, and conical sheaves D1 and D1 of the driving pulley D and conical shapes of the driven pulley R at the left and right side portions. At least a sheave contact inclined surface 111b that contacts the sheaves R1 and R1 is provided.
Further, the damping buffer member 112 is a rectangular member smaller than the outer shape of the frame-shaped contact member 111 described above, and includes a link insertion opening 112a through which the link unit 120 is inserted at the central portion thereof. A corrugated spring structure 112b is provided at the side portion.

As shown in FIG. 4, the frame-shaped block body 110 obtained in this manner alternately includes link units 120 in which a plurality of link plates 121 having connecting pin insertion long holes 121 a are arranged in the width direction. It arrange | positions between the connecting pins 130 and 130 which connect many.
The frame-shaped block body 110 is mounted by inserting the link unit 120 through the link insertion opening 111 a of the frame-shaped contact member 111 and the link insertion opening 112 a of the damping buffer member 112.

  At that time, the damping buffer member 112 that is interposed between the frame-shaped contact member 111 and the connecting pin 130 has an end of the connecting pin 130 in which the central valley portion of the wave spring structure 112 b protrudes from the link unit 120. At the same time, the frame-shaped contact member 111 with which the back side opposite to the central valley portion of the damping buffer member 112 contacts is pressed toward the other connecting pin 130, so that the frame-shaped The block body 110 is mounted with no gap between the connecting pins 130 and 130 arranged in the connecting pin insertion long hole 121a.

  Therefore, rattling of the frame-shaped block body 110 and the connecting pin 130 caused by vibration during driving is suppressed by the damping buffer member 112, and the contact sound between the frame-shaped block body 110 and the connecting pin 130 due to such rattling is suppressed. Is completely suppressed.

6 to 7 show modifications of the frame-shaped block body 110 used in the variable speed transmission chain 100 of the present embodiment. The basic member configuration of the frame-shaped block bodies 210 and 310 shown in FIGS. 6 to 7 is the same as that of the frame-shaped block body 110 described above. A description thereof will be omitted, and only different points will be supplementarily described.
That is, the damping buffer member 212 of the frame-like block body 210 shown in FIG. 6 is a plate-like body having the same shape as the frame-like contact member 211, and the damping buffer member of the frame-like block body 310 shown in FIG. The member 312 is a rectangular plate-like body smaller than the outer shape of the frame-like contact member 311. These damping buffer members 212 and 312 are made of an elastic body such as rubber, and are described above. The vibration damping buffer member 112 having such a wave spring structure 112b exhibits the same rattling suppression effect, but may be composed of, for example, a vibration damping alloy.

In addition, as for the number of installed frame-shaped contact members 111, 211, and 311 in the above-described embodiments and modifications, three are used, but one or two may be used, or four or more may be used. In the case where a plurality of frame-shaped contact members are used, the frame-shaped contact members having the same thickness may be used, and two or more types of frame-shaped contact members having different thicknesses may be appropriately combined. It may be used.
The damping buffer members 112, 212, and 312 are disposed so as to be interposed between the frame-shaped contact member and the connecting pin.

  Furthermore, the frame-shaped block bodies 110, 210, 310 composed of the frame-shaped contact members 111, 211, 311 and the damping buffer members 112, 212, 312 are arranged at different positions in each link unit. Or different materials and shapes.

  In the variable speed transmission chain 100 of the present embodiment obtained as described above, the frame-shaped block body 110 abuts on the conical sheaves D1 and D1 of the driving pulley D and the conical sheaves R1 and R1 of the driven pulley R. Since it is composed of the frame-shaped contact member 111 and the vibration-damping buffer member 112 interposed between the frame-shaped contact member 111 and the connecting pin 130, vibration generated during driving is suppressed. The effect of the noise is reduced by the member 112 and the backlash of each part such as the frame-shaped block body 110 and the connecting pin 130 is reduced, and the contact noise between the parts due to the backlash can be suppressed and the transmission noise can be reduced. It is enormous.

FIG. 3 is a usage diagram of the variable speed transmission chain according to the first embodiment of the present invention. AA sectional drawing of FIG. BB sectional drawing of FIG. The perspective view which showed a part of variable speed type transmission chain which is one Example of this invention. The assembly exploded view of the frame-shaped block body shown in FIG. The assembly exploded view of the frame-shaped block body which is a modification of FIG. The assembly exploded view of the frame-shaped block body which is the further modification of FIG.

DESCRIPTION OF SYMBOLS 100 ... Variable speed type transmission chain 110, 210, 310 ... Frame-shaped block body 111, 211, 311 ... Frame-shaped contact member 111a, 211a, 311a ... Link insertion opening 111b, 211b, 311b ... Sheave contact inclined surface 112, 212, 312 ... Damping buffer member 112a, 212a, 312a ... Link insertion opening 112b ... Wave spring structure 120 ... Link unit 121 · Link plate 121a · · · Connection pin insertion slot 130 · · · Connection pin D · · · Drive pulley D1 · · · Conical sheave R · · · Followed pulley R1 · · · Conical sheave

Claims (1)

A link unit is mounted between a drive pulley and a driven pulley having a pair of conical sheaves that are inwardly directed to each other, and is mounted with a frame-shaped block body that is displaced in the radial direction of the conical sheave and is variable in speed. In a variable speed transmission chain that is connected with a number of connecting pins in the longitudinal direction of the chain,
The link unit is composed of a link plate having a plurality of connecting pin insertion slots and arranged in the chain width direction.
The frame-shaped block body is composed of a frame-shaped contact member that contacts the conical sheave and a damping buffer member that is interposed between the frame-shaped contact member and the connecting pin,
The vibration-damping buffer member abuts and presses the end of the connecting pin protruding from the link unit, and at the same time, the other frame-shaped abutting member that abuts the back side of the vibration-damping buffer member A variable-speed transmission chain that is mounted so as to be pressed toward the connecting pin.

Images