JPH0328547A - Heavy-load transmission belt - Google Patents

Abstract

PURPOSE:To reduce noise by allowing compressive transmission in such a manner that chips can be rotated and blocks can be moved along an endless band and smoothing the entry and separation of a belt to/from a pulley. CONSTITUTION:A pair of upper and lower pins 2 are placed on an endless band 3 in a cross direction. Cylindrical blocks 5, on which chips 4 with the end faces shaped into cones or truncated cones are fixed, are mounted on both ends of the pins to be engaged with the wall face of a V-pulley, so that a belt 1 can be moved in a longitudinal direction of the band 3. The pins 2 with circular periphery faces 21 have contact with the inner periphery faces 51 of cylindrical grooves in the blocks 5, to allow the blocks 5 to be rotated. The blocks 5 with the chips 4 are placed on the endless band 3 in a longitudinal direction as well to slide a pair of upper and lower pins 2, 2 on the endless band 3. It is thus possible to perform compressive transmission of the respective blocks 5 in contact.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a high-load power transmission belt, and particularly to a high-load power transmission belt used in vehicles such as automobiles and various mechanical transmission devices.

(Prior Art) Conventionally, power transmission systems for high-load power transmission belts are generally classified into two types: compression transmission and tension transmission.

Among these, the compression type has a structure in which a plurality of blocks are slidably attached to an endless multilayer steel band, and is disclosed in, for example, US Pat. No. 3,720,113. This transmission device generally adopts a structure in which the block body is not fixed to the band, but is arranged so that it can slide on the band, and when it is applied to both the driving and driven pulleys, the block body is on the slack side. gathered,
The driven pulley is rotated by pushing the block bodies that are gathered on the loose side from the block bodies hanging on the drive pulley.

The block body used here has, for example, rectangular shoulder portions on both sides to be engaged with the steel band, and has a taber surface that comes into contact with the speed change pulley.

On the other hand, a chain belt is exemplified as a tension transmission, and this belt has a plurality of link plate groups connected by pins in a flexible manner, and a V-shaped block having a taber surface that contacts the V-belt is fitted between the pins. For example, Japanese Patent Application Publication No. 57-22442, Japanese Patent Application Publication No. 5
No. 9-226729 or JP-A-59-226730
It is disclosed in the publication number etc.

In addition, as yet another chain belt, a freely movable tip body is attached to both ends of the pin connecting multiple link plate groups, and when the belt enters the pulley, the tip body end surface adapts to the side wall of the pulley. There is also a known belt that reduces vibration, rolling, or collision when the belt enters the boule by rotating the tip body itself (see Japanese Patent Application Laid-Open No. 63-219937), and attempts to put it into practical use have been made. is in progress.

(Problem to be solved by the invention) However, with compression transmission belts, noise is generated when the block body and the pulley come into contact when the belt enters the pulley and leaves the pulley, especially under high load transmission conditions. Otherwise, noise was generated due to surface collision between adjacent block bodies.

In particular, in this type of transmission system, the pitch of the surface collisions between the block bodies is quite small, so pitch noise exists on the high frequency side, which poses the problem of affecting the human body when traveling for a long time.

On the other hand, in the tension type, since the weight of the belt is large, the collision load when the belt enters the pulley becomes large, and the noise generated at this time also becomes large. Furthermore, since the contact area between the end surface of the belt and the pulley is small, the transmission efficiency naturally decreases. Furthermore, in terms of belt durability, belts are susceptible to stress concentration due to twisting during gear shifting, and cracks may occur from pins, links, or chip bodies pressed by pins.

The present invention addresses and improves the above-mentioned problems, and employs a compression transmission system to reduce the noise generated when the belt and pulley contact each other during belt running. The purpose of the present invention is to provide a high-load power transmission belt with increased transmission efficiency and greatly improved belt durability.

(Means for Solving the Problems) In the high-load transmission belt of the present invention to achieve the above object, a pair of upper and lower pins are supported in the length direction of the endless band, and boule wall surfaces are provided at both ends of the belt. A block body equipped with a chip body having an inclined surface touching the is mounted, the block body is movable on an endless band, and the block body is arranged so as to be in contact with adjacent block bodies.

Further, the block body and the chip body are integrated, and the block body can move around the outer peripheral surface of the pin.

It also includes a case where the chip body is rotatable relative to the block body.

Furthermore, it also includes a case where the chip body mounted on the block body is held between the legs of a stopper material consisting of a pair of legs and a connecting member.

(Function) In the high-load power transmission belt of claim 1, 2 or 3 having the above-described structure, the block bodies located at both ends of the endless band are movable in the longitudinal direction of the band, so that pushing force transmission is achieved. At the same time, since the tip body attached to the block body is rotatable, when the belt enters or leaves the pulley, the tip body rotates and the impact received by the tip body from the pulley is reduced. The force is alleviated, and the noise generated during this process is greatly reduced. Furthermore, in the belt of the present invention, the weight of the belt is reduced compared to conventional chain belts, and the impact load force that contacts the pulleys is reduced, resulting in less noise and improved strength.

Furthermore, in claim 4, the stopper material prevents the chip body from falling off, and the chip body can be fitted into the block body without being press-fitted, thereby reducing damage to the chip body.

(Example) FIG. 1 is a plan view of the main parts of a high-load transmission belt of the present invention, FIG. 2 is a side view of the same belt, and FIG. 3 is a side view of the same belt. −
A cross-sectional view. In the high-load power transmission belt (1) shown in these figures, a pair of upper and lower pins (2) are arranged in the width direction of an endless band (3), for example, a multilayer steel band, and a V is attached to both ends of the pin. A cylindrical block body (5) to which a tip body (4) having a conical or truncated conical end surface is fixed so as to engage with the wall surface of the pulley is attached, and the band (
3) It is movable in the longitudinal direction. Further, the state of engagement between the block body (4) and the pin (2) is such that the pin (2) having an arcuate outer circumferential surface (21)
2) is the inner peripheral surface (
51), thereby making the block body (5) rotatable.

In this embodiment, an O-ring-shaped leg (61) having a circular opening and a connecting member (62) connecting these legs are used.
A stopper material (6) consisting of is preventing the movement of

In a belt having such an ellipse, block bodies (5) equipped with chip bodies (4) are arranged in the same way along the longitudinal direction of the endless bread (3), and a pair of upper and lower pins (2 ) (2) slides on the endless band (3). As a result, each block body (5) comes into contact with each other, and compression transmission becomes possible.

Furthermore, FIG. 5 is a longitudinal cross-sectional view of another high-load power transmission belt according to the present invention, and FIG. 6 is a side view of the main part of the same belt. A pin (2) (2) is arranged in contact with the upper and lower surfaces of the endless band (3), and a trapezoidal block body (5) is fitted at both ends of the pin. Then, the protrusion (42) of the cylindrical chip body (4) having a conical or truncated conical end surface.
) is rotatably fitted into the groove (52) of the block body, and the O-ring leg (61) of the stopper material (6) is fitted around the outer periphery of the chip body to prevent the chip body (4) from falling off. It is fitted into a recess (41) provided in the section. However, in this case, it is not necessary to provide the recess (41) on the outer periphery of the chip body.

In the case of this belt, the block body (4) is provided with a bias surface (53) on the surface that comes into contact with another block body; 4. This allows the belt to bend. (Effects) As described above, in the high-load power transmission belt of the present invention, the block includes a chip body having an inclined surface in contact with the V-pulley wall surface at both ends of the pair of upper and lower pins that slide in the longitudinal direction of the endless band. Since the body is attached and the tip body is rotatable, the block body moves along the endless band, making compression transmission possible, and also when the belt enters the pulley or leaves the pulley. When moving, it rotates slightly to smooth entry and exit and reduce noise.

Furthermore, since the chip body is locked to the legs of the stopper material, it is necessary to loosely fit the chip body into the block body in order to prevent the chip body from moving outward and to reliably prevent it from falling off. In addition, damage to the chip body can be reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view of the main parts of a high-load power transmission belt according to the present invention, FIG. 2 is a side view of the same belt, and FIG. 3 is taken along line A-A in FIG.
4 is a sectional view taken along line B10 in FIG. 3, FIG. 5 is a vertical sectional view of another high-load power transmission belt according to the present invention, and FIG. 6 is a side view of the main parts of the same belt. be. 1) High load transmission belt (2) Pin (3) Endless band (4) Chip body (5) Block body (6) Stopper material

Claims (1)

[Scope of Claims] 1. A block body having a pair of upper and lower pins sandwiched in the width direction of the endless band and a chip body having an inclined surface in contact with the pulley wall surface at both ends thereof is attached, and the block body A belt for high-load power transmission, characterized in that the endless band is movable in the longitudinal direction and is arranged so as to come into contact with adjacent block bodies. 2. The high-load power transmission belt according to claim 1, wherein the block body and the chip body are integrated, and the block body can slide on the outer peripheral surface of the pin. 3. The high-load transmission belt according to claim 1, wherein the chip body fits into the groove of the block body and is rotatable relative to the block body. 4. Claim 1, wherein the chip body is held between legs of a stopper material comprising a pair of legs and a connecting member that connects the legs.
High load transmission belt according to 2 or 3.