| 摘要 |
The hoist device mainly contains a gear assembly and a ratchet braking assembly. The gear assembly mainly contains a chain wheel driven by a main axle running through the ratchet braking assembly which mainly contains a ratchet wheel sandwiched between a pair of brake rings. The ratchet wheel, controlled by stopping blocks, can only turn in one direction. At an end of the main axle, there is a hexagonal cylindrical sleeve so that either an ordinary wrench or a power tool can be used to turn the main axle. As the main axle is turned to lift an object, the ratchet wheel clamped by the brake rings is turned as well. When the main axle is turned to the other direction, the brake rings release the ratchet wheel so that it will not prevent the chain wheel to lower the object.
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