JPH0554573B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endless belt for transmission of a V-belt type continuously variable transmission.

[Prior Art] Conventionally, as an endless belt for transmission of a V-belt type continuously variable transmission, Japanese Patent Application Laid-open No. 57-22442 (U.S. Patent No.
No. 4313730). This endless belt connects link pieces with pins to form a link, and transmits power from a pulley to a link or from a link to a pulley through blocks that surround the link in a direction perpendicular to its circumferential direction. The load applied to the inclined surfaces on both sides of the block is directly transmitted to each link piece forming the link.

[Problem that the invention seeks to solve]

However, in the conventional endless drive belt as described above, the blocks that are provided to surround the links in order to contact the pulleys and transmit power are engaged with the pulleys and transmit torque, so the blocks are not pushed by the pulleys. The outward radial force generated by the force is directly received by the link piece that comes into contact with and slides against the block through the block, causing wear on the engagement surface between the link piece and the block, causing the link to deteriorate. There was a problem that the durability of the material was impaired.

The present invention solves the above problems,
The outward radial force generated by the pressing force from the pulley is received by the connecting means that interconnects the link pieces through the block, thereby preventing radial force from being applied to the link pieces, thereby reducing wear on the link pieces. The purpose of this design is to prevent vibrations and improve the durability of the links. Furthermore, it aims to improve durability by reducing the load burden on each block and facilitate processing by making the walls thinner, while also reducing vibration during use. An object of the present invention is to provide an endless belt for power transmission that can reduce noise.

[Means for solving problems]

In order to achieve the above object, the present invention provides an endless transmission belt wound between a pair of pulleys of a V-belt type continuously variable transmission, including a plurality of link pieces, and connecting each link piece to an adjacent link piece. It has a link insertion hole through which the connected link of the link piece is inserted, and a side surface spaced apart from both the pulleys, each of which is sandwiched between the adjacent link means. a connecting means pressing block that is attached to the link with a gap maintained between the link piece and the link piece, each having a link insertion hole through which the link is inserted, and a side surface that comes into contact with both the pulleys. In order to transmit a load to and from the connecting means pressing block, the connecting means presses the connecting means and supports the connecting means in the radial direction between the connecting means pressing blocks so as to maintain a gap between the connecting means and the link piece. It consists of a pair of load blocks attached to the link.

[Effect]

In the present invention having the above configuration, the pulley on the input side transmits torque to the paired load blocks, and the load blocks press the connecting means via the connecting means pressing block. Then, a tensile force in the circumferential direction is applied to the link piece from the connecting means, and torque is transmitted. Further, the connecting means can absorb the force that acts to push the load block outward in the radial direction (outward concentrated load). Therefore, the link pieces are not subjected to outward concentrated loads. Torque is transmitted from the load block to the pulley on the output side through a path opposite to that described above.

〔Effect of the invention〕

As described above, according to the present invention, since the outward radial force generated by the pressing force from the pulley does not act on the link piece, wear of the link piece is eliminated and the durability of the link is improved. can get. Furthermore, since the paired load blocks each receive the transmission torque between themselves and the pulley,
The transmitted loads of the individual load blocks are reduced and their durability is increased. Furthermore, by dividing the load block, the curved contact portion becomes more polygonal and comes into contact with the conical surface of the pulley more evenly, which reduces vibration and noise during transmission. Furthermore, the individual load blocks are made thinner, making it easier to process grooves, holes, notches, etc.

[Example] The endless transmission belt of the present invention will be explained based on an example shown in the drawings.

Note that FIG. 1 shows a cross section taken along line BB in FIG. 2, and FIG. 2 shows a cross section taken along line AA in FIG.

The endless belt for transmission of the present invention is an endless belt for transmission that is stretched between a pair of pulleys and transmits transmission between the two pulleys, and in this embodiment, a plurality of link pieces 3 made of mutually overlapping link pieces 3 are used. Link L
, a rod-shaped pin (hereinafter abbreviated as pin) P, which is a connecting means for connecting each link L to an adjacent link L so as to enable joint movement of the link L, and a connection held between the adjacent pins P. It consists of a pin pressing block 6 which is a means pressing block, and one loading block 7 and the other loading block 8 which cover one side Pa and the other side Pb of the pin P between the adjacent pin pressing blocks 6. .

As shown in FIG. 3, the pin pressing block 6 is
It has a frame shape with a rectangular link insertion hole 65 through which the link L formed by connecting the link pieces 3 is inserted.
Curved protrusions 61a, 61b, 61c, 6 on both sides of
1d, and the width of the pin pressing block 6 is maintained such that a gap 11 is maintained on the upper edge 62 side and a gap 12 is maintained on the lower edge 63 side with respect to the conical contact surface so as not to contact the conical contact surface of the pulley. Both end faces 6
The width between 4a and 64b is defined.

As shown in FIG. 5, the load block 7 has an inclined contact surface 74 whose width decreases from the upper edge 72 to the lower edge 73 so that both end surfaces 71a and 71b come into contact with the conical contact surface of the pulley. It has a trapezoidal frame shape and has a thickness that cooperates with the load block 8 to form a connecting surface 75a that contacts the connecting surface 66b of the pin pressing block 6 arranged adjacently. Tapered surfaces 70a and 70b that converge toward the center are formed to enable the endless belt 1 to perform curved movements, and a rectangular hole surrounded by a frame serves as a link insertion hole 76. An inner wall 77a expanded in the width direction from
A pin locking recess 78 in which the pin 77b is fitted onto the pin P.
a, 78b are formed.

The load block 8 is also constructed in the same manner as the load block 7, as shown in FIG. Therefore, the tens digit of each code is replaced with 8 to represent the corresponding part, and the description of each part is replaced.

As shown in FIG. 3, the link piece 3 is made of a thin metal plate, and includes a center wall 31C, side walls 32A, 32B,
A pair of horizontal pin holes 4 and 5 are bored surrounded by end walls 31A and 31B. This link piece 3
In the assembled state, both end walls 31A, 31B and the center wall 31C are located in the link insertion holes 65 of separate pin pressing blocks 6, and the side walls 32A, 32B
are located in the link insertion holes 26 of another load block 7, and are stacked alternately so that the pin holes 4 of one link piece 3 match the pin holes 5 of the other link piece 3, and the thickness is A large number of links L are arranged in parallel in the direction
A pin P is inserted through the pin holes 4 and 5 of each link piece 3 to form an endless belt-like chain 2. The inner wall portions 4a, 5a of both end walls 31A, 31B of the link piece 3 are formed into curved protrusions 4b, 5b, which roll into contact with the long side surface 92 of the pin P, allowing indirect movement of the link L. . link piece 3
The width of the plate is slightly shorter than the width of the link insertion holes 65 and 26 of the pin pressing block 6 and the load block 7. A large number of link pieces 3 with pins P fitted into one pin hole 4 are inserted into the link insertion holes 65 and 26 of the pin pressing block 6 and the load block 7, and one piece for each pin P is pressed. The blocks 6 are connected, and one load block 7 is connected between each pin P of the link L. The distance between the pin holes 4 and 5 of the link piece 3 is such that when the pins P are inserted into both pin holes 4 and 5, the arrangement pitch of each pin P matches the arrangement pitch of the load block 7, so that each pin P The length is such that both ends of the pin do not fall off from being locked in the pin locking recesses 28a and 28b.

As shown in FIG. 4, the pin P has a prismatic shape with a substantially rectangular cross section, and its short side surfaces 91a, 91b
is the pin locking recess 77 of the load blocks 7 and 8.
a, 77b, and the long side surface 9
2 are curved protrusions 61a, 6 of the pin pressing block 6.
It is a concave curved surface that comes into contact with 1b, 61c, and 61d.

Next, the endless transmission belt 1 of this embodiment is assembled in a second manner by attaching the pin pressing block 6, one load block 7, and the other load block 8 to the chain 2 formed by the links L and pins P. This will be explained based on the diagram.

B The other pin hole 51a of the first link piece 31a of the first layer and the first link piece 32a of the second layer
and one pin hole 42a of the first pin P1.
The other load block 8a of the first layer and the one load block 7a of the first layer are connected to the first pin P1 through one pin hole 41a of the first joint link piece 31a of the first layer. Then, the first pin pressing block 6a is fitted to the first link piece 31a of the first layer.

(b) Next, align one pin hole 41a of the first link piece 31a of the first layer with the other pin hole 53a of the first link piece 33a of the third layer, and pivotally connect it with the second pin P2. , the first other load block 8a, the first one load block 7a,
Then, fit the second other load block 8b, the second one load block 7b, and the pin press block 6b in this order from the same direction as the first pin press block 6a.

C Next, align the other pin hole 52b of the second joint link piece 32b of the second layer with one pin hole 43a of the first joint link piece 33a of the third layer, and pivotally connect it with the third pin P3. , the second other load block 8b, the second one load block 7b,
Fit the other third load block 8c, one of the third load blocks 7c, and the third pin press block 6c in the same direction as the second pin press block 6b.

D. After installing the third layer's final link piece 33n, fit the pin pressing block 6n into the third layer's final link piece 33n, and place the pin in the other pin hole of the first link piece 32a of the second layer. 52a and one pin hole 43n of the final link piece 33n of the third layer are pivotally connected using the final pin Pn, and then
The other final load block 8n shown in the figure and the final one load block 7n are assembled.

The final pair of load blocks 8n, 7n are
As shown in FIGS. 6 and 7, the central portions 821, 721 of the upper edges 82, 72 are separated, and after being attached to the link L, they are fitted and connected by welding or the like.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an embodiment of the endless transmission belt of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG.
FIG. 3 is a perspective view of a pin pressing block, a rod-shaped pin, and a link piece according to an embodiment of the endless transmission belt of the present invention, and FIG. 4 is a perspective view of the other load applied to an embodiment of the endless transmission belt of the present invention. FIG. 5 is a perspective view of one load block according to an embodiment of the endless transmission belt of the present invention, and FIG. 6 is a perspective view of the other load block according to an embodiment of the endless transmission belt of the present invention. FIG. 7 is a perspective view of one of the final load blocks according to an embodiment of the endless transmission belt of the present invention. In the figure, 1...endless transmission belt, 2...chain,
3... Link piece, 6... Pin pressing block, 7... One load block, 8... Other load block, L...
Link, P... Rod-shaped pin.

Claims (1)

[Scope of Claims] 1. An endless transmission belt wound between a pair of pulleys of a V-belt type continuously variable transmission, comprising a plurality of link pieces, and each link piece can be articulated with an adjacent link piece. a link insertion hole through which the connected link of the link piece is inserted, and a side surface spaced apart from both the pulleys, each of which is sandwiched between the adjacent link means and the link a connecting means pressing block that is attached to the link with a gap between the connecting means press block, each having a link insertion hole into which the link is inserted, and a side surface that comes into contact with both the pulleys, and is capable of carrying a load. A pair is radially supported by the connecting means between the adjacent connecting means pressing blocks and is attached to the link with a gap maintained between the link pieces and the connecting means pressing blocks so as to transmit information between the connecting means pressing blocks. An endless belt for power transmission characterized by comprising a load block and a load block.