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Friction transmission belt

A transmission belt, friction coefficient technology, applied in transmission belts, V-belts, belts/chains/gears, etc., can solve problems such as noise, poor wettability, and reduced transmission performance

Active Publication Date: 2007-04-04
MITSUBOSHI BELTING LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, since ethylene alpha olefin elastomer has poor wettability to water and is easy to repel water compared with chloroprene rubber, the state of water intrusion between the belt and the pulley in the wet state is not uniform
In the part that is not invaded by water, the coefficient of friction is not lowered and the belt is in close contact with the pulley, while in the part that is invaded by water, the coefficient of friction is partially reduced to cause slippage between the belt and the pulley, thereby generating a belt that suffers from stick-slip noise question
However, in the case of backward running, since the wettability of ethylene alpha olefin elastomer is worse than that of chloroprene rubber, when rain or rapid water invades (in a wet state) in the pulley area, transmission performance occurs Problems with lowering or noise due to sliding
[0010] Also, in the case of adding a low-friction coefficient substance to the rubber composition, the friction coefficient of the belt is changed according to the use conditions such as dry state, wet state, and pulley coating type, thereby causing a problem that noise cannot be stably prevented

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2

[0114] Embodiment 1 and 2, comparative example 1

[0115] Each of the V-ribbed belts in Examples 1-2 and Comparative Example 1 was formed as follows: a tension member formed of a rope made of polyester fiber was embedded on one side of the adhesive rubber layer, and cotton with rubber A double layer of canvas is stacked on the above-mentioned side of the adhesive rubber layer, and then three rib portions are arranged in the longitudinal direction of the belt on the compressed rubber layer, which is placed on the other side of the adhesive rubber layer.

[0116] Each compression layer was obtained by adjusting the rubber composition shown in Table 1, kneading with a Banbury mixer, and rolling with a calender roll. The compressive layer contains short fibers, and the short fibers are oriented in the width direction of the belt. The rubber content of each adhesive layer, in which short fibers were excluded from the rubber composition, is shown in Table 1. The physical propertie...

Embodiment 2

[0140] Example 2 shows similar properties to Example 1 as shown in FIGS. 7 , 8 and 9 .

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Abstract

The present invention provides a friction transmission belt having a friction transmission surface having a rubber composition containing a plasticizer, the plasticizer forming a film on the friction transmission surface, a change in friction coefficient (mu) with respect to a change in slipping velocity (V) indicated by a difference between a pulley speed and a belt speed (dmu / dv) being 0 or a positive value in a dry state and a wet state.

Description

technical field [0001] The present invention relates to friction-driven power transmission belts (hereinafter referred to as friction belts) for power transmission. Background technique [0002] Rubbers such as natural rubber, styrene-butadiene rubber, and chloroprene rubber are generally used in friction belts for power transmission of automobile engines and the like. However, with the social needs of saving energy and saving space in the background art, closely packed components tend to be used in the engine room of automobiles, and the ambient temperature in the engine room increases due to the close packing compared to conventional examples. [0003] In such a high-temperature environment, the problem of early crack generation due to hardening of the rubber for friction conveyor belts has been pointed out. Also, since the rotation speed fluctuation of the engine increases with energy saving, the tension fluctuation of the power transmission belt also increases due to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16G1/06F16G1/28F16G5/04F16G5/20C08L23/16C08K3/04C08J5/14
CPCF16G5/20F16G5/06
Inventor 西田周平下尾聪日根野顺文
Owner MITSUBOSHI BELTING LTD
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