Patent ID: 9284172
Filing Date: 2016-03-15
CPC Classification: B66D

Claim Text:
1. A manual chain block comprising: a drive shaft capable of rotating in response to a manual operational force; a load sheave around which a load chain is looped, the load sheave being mounted coaxially to the drive shaft, supported together with the drive shaft on a frame via a bearing, and coupled to the drive shaft so that mechanical power is transmitted therebetween, via a reduction gear mechanism, wherein the reduction gear mechanism includes a pinion gear provided on the drive shaft, reduction gears which mesh with the pinion gear, and a load gear interlocked with the load sheave and meshed with the reduction gears; a gear cover which houses the reduction gear mechanism and includes a first bearing hole to support the reduction gear mechanism at one end of the reduction gear mechanism and serve as a bearing for the reduction gear mechanism; and an auxiliary plate mounted on a side surface of the frame and in the periphery of the bearing for the load sheave, the auxiliary plate including a first portion on which the auxiliary plate is mounted on the side surface of the frame, a second portion extending from the first portion and spaced apart from the side surface of the frame, and a third portion extending from the second portion toward the side surface of the frame, the third portion including a second bearing hole extending in a thrust direction of the bearing for the load sheave, wherein the second bearing hole supports the reduction gear mechanism at another end of the reduction gear mechanism and serves as a bearing for the reduction gear mechanism, wherein the frame includes an insertion hole through which the load sheave and the drive shaft extend, wherein the second portion includes a center hole spaced apart from the insertion hole in the thrust direction, and wherein the insertion hole and the center hole support the bearing for the load sheave.