JPS6170246A - V-belt - Google Patents

Abstract

PURPOSE:To prevent the breakage of metal bands by decreasing the width- direction size of the metal bands constituting a layer-like band toward the outer-periphery side and preventing the contact between the metal bands and the pulley face. CONSTITUTION:A metal band 10e on the outer periphery side has a possibility to be displaced relatively largely in the width direction when a distortional force is applied to a V-belt, and the size of a metal band 10e in the width direction is made smallest. Accordingly, the metal band toward the outer- periphery side has a larger gap from the pulley face than the one on the inner- periphery side, thus metal bands 10a-10e constituting a metal band 10 are never brought into contact with the pulley face while the rotating force is transmitted. Therefore, a trouble that the metal bands 10a-10e are broken never occurs.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a V-belt.

(B) Prior art As a conventional V belt, for example, Utility Model Application No. 58-7684
There is one shown in Publication No. 4. This V-belt is composed of two layered bands made by overlapping multiple metal bands, and a number of blocks. , assembled into a layered band.

(c) Problems to be Solved by the Invention However, the conventional V-belt as described above has a problem in that the metal strip constituting the single-layer band is prone to breakage.

In other words, the multiple metal bands that make up the layered band are all manufactured to have the same width dimension, and the V-belt runs non-linearly (depending on the gear ratio, the groove center position of one boob and the other pulley When the groove center position does not match the V-belt and the V-belt runs eccentrically), the metal band protrudes from the horizontal groove of the block and comes into contact with the pulley surface, causing problems such as breakage and deformation. do.

In particular, of the metal bands that make up the layered band, the outer peripheral side tends to move in the width direction and come into contact with the pulley surface. This is to prevent the hand from moving in the width direction, but the effect of the middle height is smaller for the metal band on the outer peripheral side of the layered band.The present invention solves the above problems, The object is to provide a V-belt in which the metal band does not protrude from the lateral groove of the block and does not cause problems such as breakage.

(d) Means for Solving the Problems The present invention achieves the above object by reducing the widthwise dimension of the metal strip constituting the layered band on the outer circumferential side. In addition, in order to equalize the tensile stress of each metal band, the thickness dimension of the metal band on the outer peripheral side may be increased to make the cross-sectional area of each metal band the same.

(E) Effect With the above-described configuration, the metal band on the outer circumferential side can be allowed to move by a large amount in the width direction, so that it does not easily protrude from the lateral groove. Therefore, problems such as breakage of the metal band are prevented from occurring. Incidentally, by increasing the thickness of the metal bands on the outer circumferential side and making the cross-sectional areas of each metal band the same, it is possible to equalize the load (tensile stress) on each metal band.

[F] Embodiments Hereinafter, embodiments of the present invention will be described based on FIGS. 1 and 2 of the accompanying drawings.

As shown in FIG. 2, the V-belt is composed of two endless annular layered bands 10 and a large number of blocks 12 assembled to the two endless annular layered bands 10. As shown in FIG. 1, the block 12 has slopes 12a on both sides that contact the pulleys, and lateral grooves 12b on both sides for assembling into the layered band IO. Lateral groove 1
A layered band 10 is fitted onto each of the layers 2b. The lower wall 12C in FIG. 1 constituting the lateral groove 12b is
The 0-layer band 10, which has a middle height due to the crowning process, is constructed by overlapping five endless annular metal bands 10a-10eli with slightly different overall lengths. The dimensions of the metal bands 10a to IQe in the radial direction are as follows:
The innermost metal band 10a is the largest, and the following metal band 1
The values are gradually decreased in the order of 0b, LOc, LOd, and loe. Note that the thickness dimensions of the metal bands 10a to 10e are all the same.

This V-belt is wound between the grooves of the two pulleys and transmits the rotational force between the two pulleys. Each block 1
The two inclined surfaces 12a are in frictional contact with the pulley groove, and the force input to the block 12 is sequentially transmitted via the adjacent blocks 12. At that time, the layered band 10 is
In the case of a pulley that controls the rotation ratio between both pulleys by making the pulley groove radius variable, the center position of the pulley grooves of both pulleys is adjusted according to the rotation ratio. Relatively small deviations occur. Due to this deviation, a torsional force acts on the V-belt, and the layered band lO
Although the relative position in the width direction between the block 12 and the block 12 may change, in this V-belt, the layered band IO does not protrude from the lateral groove 12b and come into contact with the boot surface.

That is, the effect of the height of the wall 12c of the block 12 provides the effect of holding the layered band 10 in a predetermined position. This effect is greatest in the metal band on the inner circumferential side of the layered band 10 and gradually becomes smaller toward the outer circumferential side. Therefore, the metal band on the outer circumferential side, for example, the metal band 10e, may be displaced relatively largely in the width direction when torsional force is applied to the V-belt, but the width direction dimension of the metal band 10e is the smallest. , the metal band on the outer periphery side does not come into contact with the pulley surface because the gap between it and the pulley surface is large.In this way, the metal band on the outer circumferential side has a large gap between it and the pulley surface, so the layered band lO is The metal band 10a-foe that constitutes the metal band 10a-foe does not come into contact with the boob surface, so the metal band 10a-foe
Problems such as breakage of e do not occur.

In the above embodiment, the metal bands 10a to 10e have the same thickness, but the two thicknesses can be made larger on the outer peripheral side so that the cross sections of the metal bands 10a to 10e are the same. In this case, the tensile stress of each metal band 10a to foe becomes uniform, and the life of the layered band 10 can be extended.

(G) Effects of the Invention As explained above, according to the present invention, since the widthwise dimension of the metal strip constituting the layered band is made smaller on the outer peripheral side, contact between the metal strip and the pulley surface is prevented. It is possible to prevent problems such as breakage of the metal band. Note that it is also possible to increase the thickness of the metal bands on the outer peripheral side to make the cross-sectional area uniform, thereby making the load on each metal band constant.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a V-belt according to the present invention (I--
FIG. 2 is a side view of the V-belt according to the present invention. 10==single-layer band, lOa~loe@*metal band, 12...block, 12a...slanted surface, 12b-
... Lateral groove.

Claims (1)

[Scope of Claims] 1. A V-belt consisting of a layered band formed by overlapping endless annular metal bands and a large number of blocks assembled to the layered band through lateral grooves opening on the sides, the layered band comprising: A V-belt characterized in that the widthwise dimension of the constituent metal band gradually decreases from the inner circumferential side to the outer circumferential side. 2. The V-belt according to claim 1, wherein the thickness of the metal bands is gradually increased from the inner circumferential side to the outer circumferential side so that the cross-sectional area of each metal band is equal.