Belt drive - the mechanism which is carrying out transfer of rotary movement by means of a belt, covering the pulleys fixed on shaft. Belt drive, being intermediate flexible communication{connection}, transfers{transmits} twisting moment from a leading pulley on conducted due to the forces of the friction arising between a tense belt and pulleys. Depending on type of used belts belt drives can be flat, chock and circular.
Be extended belt drives polychock the belts having chock ledges on the internal side. Flat and circular belts drive are used usually on one in transfer, and chock - on some pieces.
flat transfers are simple and convenient, allow to apply usual pulleys with a smooth surface, are capable to work at high speeds. However belt drives with use flat belts drive have low traction effort, significant dimensions and rather small transfer attitude.
chock transfers, providing the increased coupling of belts with pulleys, allow to reduce interaxal distance, to reduce the sizes of transfer and to increase the transfer attitude. Belt drives with use round belts drive are used mainly in drives of low power (in desktop machine tools, sewing machines... ).
Advantages of belt drives: constructive simplicity, rather small cost, ability to transfer power on significant distances, smoothness and noiselessness of work, protection of mechanisms from an overload due to elastic properties of a belt and its ability to revolve on pulleys. Lacks of a belt drive: short service life of belts, rather big sizes, high loading on shaft and bearings, inconstancy of the transfer attitude (because of inevitable slippage a belt). Be extended belts drive from highly elastic and strong synthetic materials, narrowchock and gear belts. Belt drives are widespread practically in all industries, and also in drives of the machines applied in an agriculture
The information was given by beltdrive.50webs.com
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