JPH0557460B2 - - 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, there is an endless belt for transmission of a V-belt type continuously variable transmission disclosed in Japanese Patent Laid-Open No. 58-21043. In this structure, the front and rear connecting surfaces facing the circumferential direction of each load transmission block connected to the link are supported by the connecting pins of the adjacent links, respectively. In this way, no load other than the power transmission load in the circumferential direction is applied to the link piece, and the durability of the link can be improved.

[Problem that the invention seeks to solve]

However, in such an arrangement, a load transmission block is placed between adjacent connecting pins, so a relatively large gap is formed between each block, and during transmission operation, there is There was a problem that it was easy to bend and deform, and such deformation caused vibration and noise.

The present invention solves the above problems,
To provide an endless belt for transmission, which stabilizes the belt orbit during transmission operation by preventing deviation of each block from the belt orbit, and suppresses vibration due to deformation and noise generated thereby.

[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 connecting means that connects the link pieces so that they can move together, a link insertion cavity through which the connected links of the link pieces are inserted, and a side surface that comes into contact with both the pulleys, and the load is transferred between the connecting means and the connecting means. a block supported in the radial direction and the circumferential direction by the connecting means between the adjacent connecting means for transmitting the information, and mounted on the link with a gap between the block and the link piece, and at least every other block; and a springing means that is supported by the block and springs outward in the radial direction from the supporting portion of each of the mutually adjacent blocks with respect to the connecting means.

[Operation and effect of the invention]

In the present invention having the above configuration, power is transmitted through the links with the blocks supported by the connecting means having their outer peripheries pushed against each other by the biasing force of the resilient means, so that the belt orbit is It is stable, and vibrations caused by deformation of the belt and generation of noise due to the vibrations can be suppressed. Specifically, power transmission is performed between each block and the link via the connecting means, whereas the resilient means springs the radially outer side of the support part of the block for the connecting means, so that the power transmission is not be involved. This results in
Vibration and noise can be suppressed without reducing the durability of the belt by using a soft member with a high vibration-proofing effect as an elastic means.

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

The first embodiment of the endless belt for power transmission of the present invention is described in the first embodiment.
This will be explained based on the figures to FIG. Note that Figure 1 is the BB cross section in Figure 2, and Figure 2 is the A-A cross section in Figure 1.
A cross section is shown.

In this embodiment, the endless transmission belt 1 of the present invention is provided with one pin hole 4 and the other pin hole 5 at both ends, and a large number of link pieces 3 are provided with one pin hole 4 or the other pin hole 5. It consists of links L that are overlapped in such a manner that the links L are overlapped, and a cylindrical pin (hereinafter abbreviated as pin) P that is a connecting means that connects each link L to an adjacent link L so as to enable joint movement of these links L, The block B is interposed between an endless chain 2 connected to each other, each pin P of the chain 2, and a block B made of metal, synthetic resin, ceramic, etc., and an adjacent block B. It also consists of an explosive means 6 held by block B.

As shown in FIGS. 4 and 5, the block B has both side edges 15a and 1 in the cross-sectional shape of the endless transmission belt 1.
5b is a trapezoidal plate having an inclined contact surface 15 whose width decreases from the upper edge 16 of the belt toward the lower edge 17 so as to contact the conical contact surface of the pulley of the continuously variable transmission. In the vertical cross-sectional shape, one connecting surface 13A has banks 11A and 11B on both sides.
The other connecting surface 13B is provided with a lateral threading pin groove 12 that spans the entire width in the width direction in correspondence with the bag pin groove 11, and intersects with the bag pin groove 11 and the threading pin groove 12. A link insertion cavity 14 (a rectangular hole in this embodiment) is provided in the direction of continuous binding. The through pin groove 12 may have a bank on one side.

As shown in FIG. 3, the link L is made up of a large number of thin metal plate link pieces 3 arranged in parallel in the thickness direction, with one pin hole 4 and the other pin hole 5 bored at both ends. This link L has both ends 21A and 21B fitted into the link insertion cavity 14, and a pin chamber 21 (FIG. 2) formed by the bag pin groove 11 and the through pin groove 12 of the adjacent block B. A large number of links L arranged in parallel in the thickness direction and aligned with one pin hole 4 or the other pin hole 5 of the link piece 3 are pivotally connected by a pin P to form an endless belt-like chain. 2 is formed. The width of the link piece 3 is slightly shorter than the width of the link insertion cavity 14 of the block B in the upper and lower edges 16 and 17 direction, and a large number of links with pins P fitted into one pin hole 4 are formed. The pieces 3 are inserted into the link insertion spaces 14 of the block B, and one block B is interposed between the pins P of the links L. The distance between one pin hole 4 and the other pin hole 5 of each link piece 3 is the distance between the one pin hole 4 and the other pin hole 5.
When pins P are inserted into block B, each pin P is connected to block B.
The length is such that the block B is inserted into the bag pin groove 11 and the through pin groove 12 to sandwich the block B, or at least is engaged with the pin grooves 11 and 12 to prevent the block B from falling off.

The pin P has a length in the thickness direction and an outer diameter corresponding to the pin chamber 21 formed by the bag pin groove 11 of the block B and the through pin groove 12 of the adjacent block B, and As shown in the figure, blocks B having adjacent bag pin grooves 11 and through pin grooves 12 are linked together with each link piece 3 to form an endless transmission belt 1, and each link piece 3 is plate-shaped and one of the blocks B is connected to each other by link pieces 3. A pin hole 4 is formed on one side and a pin hole 5 on the other side, and a pin P is fitted into the pin hole 4 on one side and the pin hole 5 on the other side.

The explosive means are as shown in Figures 1, 2, 4, and 6.
It is a metal plate spring member 61a, and its length is slightly shorter than the lateral length of the link insertion cavity 14 of block B.
In addition to being provided with a flat insertion portion 62 having the same width as the thickness of the link insertion space 14, which is the portion inserted into the gap 14A between the illustrated upper wall 14a of No. 4 and the illustrated upper edge 31 of the link L, A clamping portion bent from both ends 62a, 62b, extending along the double-connected binding surfaces 13A1, 13B2, and held by the block B, and the double-connecting binding surfaces 13An, 13B1 of the adjacent blocks B2, Bn.
Extended portions 64a and 64b are optionally provided with pressing portions 63a and 63b that are pressed.

Next, the assembly of the endless transmission belt 1 of this embodiment, in which the blocks B are connected to the chain 2 formed by the links L and pins P, will be explained with reference to FIGS. 1 and 2.

(a) 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 first block B1, which is pivotally connected to the first link piece 31a of the first layer and has a leaf spring 61a attached thereto, is fitted in the first block B1 with the cap pin groove 11 clear.

(b) Next, the pin hole 41b of the second joint link piece 31b of the first layer and the first joint link piece 32a of the second layer.
and the other pin hole 52a of the second pin P2.
The second block B2 is fitted into the first joint link piece 32a of the second layer in the same direction as the first block B1.

(c) Next, align the other pin hole 51b of the first layer and the second joint link piece 31b with one pin hole 42a of the second joint link piece 32b of the second layer, and pivot with the third pin P3. 2nd layer 2nd link piece 3
2b is fitted with a third block B3 having a leaf spring 61b attached thereto in the same direction as the second block B2.

After repeating this process one after another, (d) after installing the final link piece 32n of the second layer, the bag pin groove was changed to the through pin groove 12n, and the leaf spring 61n was installed, as shown in FIG. The final block Bn is the final node link piece 32 of the second layer.
n, and connect one pin hole 41a of the first link piece 31 of the first layer and the other pin hole 52n of the final link piece 32n of the second layer to the final pin Pn.
At the same time, the final pin Pn is pivoted at both ends to prevent it from coming off.

As a means to prevent the pin from coming off, the end of the pin Pn is caulked at at least one location. or pin Pn
At least one snap spring is attached to the end of the Alternatively, a pin slip-out prevention cover is attached to cover the end of the pin Pn fitted to the block Bn or the link piece 3. The cover may be press-fitted into the pin P positioning recess 14C, or may be welded to the pin P. Alternatively, the cover may be screwed onto the block B or onto the pin P. Further, in this embodiment, the pin Pn positioning recesses 14C of the block Bn are provided at both ends, but the pin P positioning recesses 14C may be provided only on one side (for example, one side is bag-shaped and the other side is a pin having a bag-like shape and a means for preventing the pin from coming off).
Pn positioning recess 14C), and may also have a locking means at one end. (For example, a pin slipping prevention cover is provided on one side of the pin Pn, and the other side is left open.) Figures 8 and 9 show the second endless belt for power transmission of the present invention.
An example is shown below (hereinafter, the same functional parts as in the first example are given the same numbers). In this example, the spring means 7 and the leaf spring 71 are
A lower clamping part 72 that clamps the upper wall 14a of the link insertion cavity 14, an upper clamping part 73 that clamps the upper edge 16, a connecting part 74 that connects both clamping parts 72 and 73, and a connecting part 74 that A pressing part 7 is provided with a cut and raised protrusion and presses against the other connecting surface of the adjacent block.
5, and has a substantially U-shape consisting of both holding portions 72,
The length of the connecting portion 73 in the connecting direction is slightly shorter than the plate thickness of the block B, and the pressing portion 75 is provided at the center of the connecting portion 74 with the end portion 72a of the lower holding portion 72 as the base.

10 and 11 show a third embodiment of the endless transmission belt of the present invention.

In this embodiment, the leaf spring 81, which is the springing means 8, is
an insertion portion 82 that is inserted into the link insertion cavity 14;
A pressing portion 8 extends in a curved manner from both ends 82a, 82b of the insertion portion 82, and presses the other and one connected surfaces of the block with curved surfaces 83a, 83b.
3A, 83B and the upper surface 13 of one connected surface 13A
a, and holding portions 84a and 84b that hold the upper surface 13b of the other connecting surface 13B.

12 and 13 show a fourth embodiment of the endless transmission belt of the present invention.

In this embodiment, the leaf spring 91, which is the springing means 9, is
An insertion part 92 inserted into the link insertion cavity 4, extending in the outer circumferential direction from both ends 92a, 92b of the insertion part 92, with tips 93a, 94a, 95a, 96a having one connecting surface 13A and the other connecting surface 13B. Holding parts 93A, 9 that hold the upper surfaces 13a, 13b of
Outer circumferentially extending portions 9 designated as 4A, 95A, and 96A
3, 94, 95, 96, extending in the upper surface direction of one connecting surface and the other connecting surface of adjacent blocks from both ends 92a, 92b, and formed between outer circumferentially extending portions 93, 94. Pressing portion 97 and pressing portion 9 formed between outer circumferentially extending portions 95 and 96
Consists of 8.

[Brief explanation of the drawing]

FIG. 1 is a side view and side sectional view of a first embodiment of an endless belt for power transmission according to the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, and FIG. A perspective view of a link and a cylindrical pin according to the first embodiment, FIG.
FIG. 5 is a perspective view of a block according to the first embodiment of the endless transmission belt of the present invention, FIG. 6 is a perspective view of a resilient means according to the first embodiment of the endless transmission belt of the present invention, and FIG. The figure is a perspective view of the final block according to the first embodiment of the endless belt for transmission of the present invention, FIG. FIG. 9 is a perspective view of the resilient means according to the second embodiment of the endless transmission belt of the present invention, and FIG. 10 is an assembled view of the block and resilient means according to the third embodiment of the endless transmission belt of the present invention. , FIG. 11 is a perspective view of an elastic means according to a third embodiment of an endless transmission belt of the present invention, and FIG. 12 is a perspective view of a block and an elastic means according to a fourth embodiment of an endless transmission belt of the present invention. The assembly diagram, FIG. 13, is a perspective view of a resilient means according to a fourth embodiment of the endless transmission belt of the present invention. In the figure 1... Endless power transmission belt 2... Chain 3... Link piece 4... Pin hole on one side 5...
...Other pin hole 6, 7, 8, 9...Propelling means
B...Block L...Link P...Cylindrical 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 connecting means for connecting; a link insertion cavity through which the connected links of the link pieces are inserted; and a side surface that abuts both the pulleys; a block supported in the radial direction and circumferential direction by the connecting means between adjacent connecting means and mounted on the link with a gap between the blocks and the link pieces; and a block supported by at least every other block. an endless belt for power transmission, comprising a resilient means for resiliently radially outwardly from a supporting portion of each of the mutually adjacent blocks relative to the connecting means.