| 摘要 |
A flat plate drive system for controlling the axial rotational motion of a drive shaft for raising and lowering a load, that optimizes frictional engagement while maximizing heat dissipation away from the moving parts of the drive system. The drive system can be generally used for raising and lowering many types of heavy loads, and is particularly suited for loads that are supported by a cable attached to one end of the drive shaft, with the cable extending through a cradle beam which supports a heavy object, such as a boat. The drive system comprises a worm connected to a source of rotational power. The worm frictionally engages a worm gear wheel that axially rotates a drive shaft. The worm and worm gear wheel are connected to a backplate support. The system maximizes the friction between the worm and worm gear wheel. The system also maximizes the transfer of heat generated by the frictional engagement of the worm and worm gear wheel away from the worm and worm gear wheel to other parts of the drive system, particularly the backplate which is composed of a high thermal conductivity material.
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