JPS61116149A - V-belt - Google Patents

Abstract

PURPOSE:To aim at the promotion of lightweightiness and stabilization in a contact area, by embedding a V-block, forming an oblong rectangular section and having an engaged part, inside a cog part. CONSTITUTION:A V-belt is one that a temsile body 2 and a V-block 3 are embedded in an elastic body 1, and this V-block 3 is embedded at the inner diameter side of the tensile body 2 and that it is embedded as being crossed with the tensile body 2. The tensile body 1 makes the inner diameter side of the tensile body 2 a concave/convex form, and the V-block 3 is embedded in a cog part 4 forming a convex part so that the section forms an oblong rectangular form, making perpendicularity with the tensile body 2. And, both end faces 6 and 6 of the V-block 3 conforms with an incline angle of a V-pulley, while both engaged parts 7 and 7 are projected to the central part or both sides whereby separation from the elastic body 1 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a V-belt used for wrapping around a beam-type pulley.

Some V-belts are mainly made of rubber, while others are made of metal, but here we will focus on V-belts that are mainly made of rubber.

(Prior art) There are many different types of V-belts that are mainly made of rubber, but the representative V-belt is the
2/! ;39, Utility Model Application Publication No. 59-/22≠53 exists.

The V-belt has low elongation and high strength rope tension members buried in parallel in cushion rubber, and cogs are provided at a constant pitch on the inside in the radial direction when wound around the V-shaped pulley. A porous sintered structure whose surface is covered with a resin layer, etc. is inserted into the belt in the hexagonal direction, and the tension acting on the V-belt is borne by the rope tensile body, and the pressure from the V-shaped pulley is borne by the above-mentioned rope tension body. Acts on porous sintered structures. The cross-sectional shape of the porous sintered structure is specified to be arbitrary, but as shown in the embodiment, the cross-section of the porous sintered structure is a polygon with the same horizontal and vertical sizes, or It has a circular cross section.

By the way, the pressure acting from the V-shaped pulley mainly applies to the porous sintered structure, but the area in which it actually contacts is theoretically a line contact, and does not require an area in the longitudinal direction of the V-belt. On the contrary, the contact area with the V-shaped pulley becomes unstable, and the weight of the V-belt itself increases, resulting in adverse effects.

(Problems to be Solved by the Present Invention) As described above, the above V-belt may be suitable for high-load transmission applications, but the size of the porous sintered structure that receives pressure from the Vlll pulley is large and the contact area is large. Problems exist in high speed operation due to instability and excessive weight. It is particularly unsuitable for a V-type pulley set continuously variable transmission operated at high speed.

The present invention aims to solve these problems, and provides a lightweight V-belt whose contact area with the inclined surface of the V-shaped pulley 17 is always constant. Means) Therefore, the V-belt according to the present invention is a V-pro, in which the contact body that makes frictional contact with the V-type IJ- has a vertically long rectangular cross section;
This applies to cases where the cog portion is fixed to a corrugated cog portion, and the cog portion is formed on the inner diameter side of the tensile member, and cases where the cog portion is formed on both the inner and outer sides of the tensile member. .

Hereinafter, one embodiment of the V-belt according to the present invention will be described in detail based on the drawings.

(Example) FIG. 1 shows one form of the V-belt according to the present invention.

As shown in Figure 1, the V-belt is made of an elastic material such as rubber (
c) Tensile body (2) and V block 1. ? ) is buried, and must bear the tensile stress generated in the cross section of the beam belt (2), so a material with low elasticity and extremely high tensile strength, such as wire rope or glass fiber, is selected. A plurality of V-blocks IJ) are arranged in parallel in the longitudinal direction of the V-belt, while the V-blocks IJ) are buried on the inner diameter side of the tensile member Q) and perpendicularly to the tensile member (2). The above elastic body (
In 1), the inner diameter side of the tensile body Ω) is uneven, and the block (, 3) is embedded in the cog part (≠) forming a convex part, and the cross section forms a vertically long rectangle, It is perpendicular to the tensile member C2). Furthermore, the elastic body (canvas on the outer surface and the uneven inner surface so as to cover C) is adhered in a laminated form of one to six layers. The above-mentioned canvas 0) is a canvas made of nylon, Kevlar (trade name), bias, etc., and the material is not particularly limited.

By the way, FIGS. 2(a) and 2(b) show an enlarged view of the block C3) taken out from the cog part (ri), and both end faces (A) of the V-block (1) beam-type pulley ( It is inclined at an inclination angle (e), and has a locking part (7) in the center or on both sides.
) (7) protrudes to prevent separation from the elastic body (1).

■ In addition, the r-lock (, 3) is made of steel or resin, with a core (a) of chain lines or glass fiber embedded in the longitudinal direction of the V-Pro, and the ■ type pulley. The tension body (
2) Transmitted to the elastic body (c).

The V block ■ shown in Fig. 4 has a T-shaped cross section, which means that the contact area with the elastic body (1) such as rubber is increased.
It is also possible to relieve the contact surface pressure with the elastic body (1) due to the radial component of the pressure acting from the V-shaped pulley. Furthermore, FIG. 3 shows another embodiment of the V-belt according to the present invention, in which cog parts Φ) are formed on the inner and outer sides of the tensile member (2), respectively, and V-blocks U) similar to those described above are embedded. This is the case.

As described above, the V-belt according to the present invention has an elastic body (
1) Tensile member (2) that bears tension and V-shaped boot 9-
It is equipped with a V-block C3) having a vertically long rectangular cross section which is in frictional contact with the power receiving body and directly transfers the power. Zhang body (
In contrast to 2), it is embedded in the cog section formed on the inner diameter side or on both the inner and outer sides, and exhibits the unique effects described below.

(Effects) (1) The V block (J) that makes frictional contact with the V-shaped pulley has a vertically long rectangular cross section, increasing the actual contact area with the V-shaped pulley, ensuring stable winding, and eliminating waste in power transmission. This results in an improvement in transmission efficiency.

■ ■Because the block is vertically long, the actual contact area is large, but the volume and weight are small, which makes the V-belt lighter, and the contact with the ■ type pulley slope is narrow, so it is always It is constant and there is little slippage after it bites into the V-shaped pulley, making it suitable for power transmission during high-speed operation and improving the durability of the V-belt itself.

(3) ■ By making the cross-sectional shape of the block T-shaped, V
When the belt engages with the V-shaped pulley and moves, it receives pressure over a wide area due to the force that acts in the radial direction of the V-shaped boob IJ - against the V block during engagement, so it is effective for adhesion between the V block and the rubber. Leave no problems.

(4) Since the V-block has a vertically elongated shape, when the V-belt meshes with the V-shaped pulley and transmits power, a transmission force acts on the block in a direction perpendicular to the radial direction. can withstand.

[Brief explanation of drawings]

FIG. 1 shows one form of the V-belt according to the present invention, FIG. In the embodiment, FIG. 4 shows the case where the beam block is T-shaped.

Claims (6)

[Claims] (1) Canvas is pasted on both the inner and outer surfaces of an elastic body in which multiple tensile bodies are embedded in the longitudinal direction, and the canvas is attached at a constant pitch so that it has an inclination angle that can engage with the inclined surfaces of the beam-type pulleys on both sides. A V-belt having a cog portion, characterized in that a V block having a vertically long rectangular cross section and having a locking portion is embedded in the cog portion. (2) The V-belt according to claim 1, wherein the cog portion is formed on the inner diameter side of the tensile member when it is wound around the V-shaped pulley. (3) The V-belt according to claim 1, wherein the cog portions are formed on both the inner and outer sides of the tensile member. (4) The V-belt according to claim 1, 2 or 3, wherein the V-block is made of steel. (5) The V-belt according to claim 1, 2 or 3, wherein the V-block is mainly made of resin and has a core of steel wire or glass fiber embedded in the longitudinal direction. (6) Claim 1 in which the V block is T-shaped
5. The V-belt according to item 2, item 3, item 4, or item 5.