Belt transmission device
A technology of belt transmission and variable speed belt, which is applied in transmission devices, V-shaped belts, belts/chains/gears, etc. It can solve problems such as increased collision noise, frictional noise, unstable friction coefficient, and unreliable control of the variable speed ratio. Achieve the effect of noise suppression and high power transfer performance
Inactive Publication Date: 2014-07-16
MITSUBOSHI BELTING LTD +1
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- Description
- Claims
- Application Information
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Problems solved by technology
[0006] In the case of using a block formed of a resin composition blending a fiber-reinforced material such as Patent Document 1, since the hardness of the block increases, this disadvantageously causes collision noise generated when the block comes into contact with the speed change pulley and block separation. The friction noise generated when changing the speed of the pulley becomes larger
[0007] In addition, when the hardness of the block is increased, the wear resistance of the block can be improved but not fully satisfied
And in the process of running the belt for a long time, the blocks are subject to wear
As a result, the coefficient of friction between the block and the surface of the V-groove becomes unstable, causing problems such as inability to reliably control the transmission ratio
Method used
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Embodiment
[0134] [Noise level measurement test]
[0135] An experiment was conducted to examine the difference in noise level during belt running between when the resin layer was provided and when the resin layer was not provided. In this test, using Figure 6 Belt running tester 50 shown in (a) and 6(b).
[0136] In embodiment 1 and comparative example 1, manufacture and Figures 3 to 5 The belts shown in are identical in shape and have belt B of blocks formed from a resin composition comprising 70% by weight polyamide 46 (PA46) resin and 30% by weight carbon fiber (CF).
[0137] In Example 1 and Comparative Example 1, before measuring the degree of noise, the belt B was suspended on the driving pulley 51 (belt winding diameter: 53 mm, no resin layer) and the driven pulley 52 (belt winding diameter: 109 mm , no resin layer), and in an atmosphere of 20 to 30° C., in a state where no axial load on the rotating shaft of the driven pulley 52 is applied, repeatedly increasing the rotatio...
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Abstract
The invention provides a belt transmission device, including: a plurality of variable belt wheels which include a driving variable belt wheel and a driven variable belt wheel, each of which has a V-shaped groove whose periphery width is variable; and a belt which includes a center belt and a plurality of blocks longitudinally arranged along the center belt; the belt is wound on the plurality of variable belt wheels via blocks in a state that two surfaces of the V-shaped groove of each variable belt wheel, wherein the block includes a resin composition including a thermoplastic resin and at least a fiber reinforced material mixed with the thermoplastic resin; the surface of the V-shaped groove of at least a variable belt wheel in the plurality of variable belt wheels has a resin layer; and the resin layer contains polyamide-imide resin and at least a solid lubricant selected from graphite, polytetrafluoroethylene and molybdenum disulfide.
Description
technical field [0001] The present invention relates to a belt transmission comprising a speed change pulley having V-shaped grooves formed on its outer periphery and a belt having both surfaces formed by the V-shaped grooves of the speed change pulley. Retained blocks, wherein the blocks are formed from a resin composition having fiber reinforcement blended therein. Background technique [0002] There is conventionally known a belt transmission comprising a driving speed change pulley, a driven speed change pulley and a belt wound around the two speed change pulleys held by both surfaces of the V-shaped groove of the speed change pulley. Each pulley has a V-shaped groove formed in its outer peripheral portion. The belt includes a central belt and a plurality of blocks arranged in the longitudinal direction of the central belt, and both side surfaces of the blocks are in contact with the V-shaped groove surface. In order to reliably transmit the rotation of the driving tra...
Claims
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Login to View More IPC IPC(8): F16H9/12F16H57/04
CPCF16G5/166
Inventor 小野健郎冈崎大辅宇都邦治伊东武彦野木祯生
Owner MITSUBOSHI BELTING LTD