发明授权
US3580405A Multiple v-belt drive for a crowd mechanism of a power shovel 失效
多功能V型皮带驱动器,用于电动机的冲击机制

Multiple v-belt drive for a crowd mechanism of a power shovel
摘要:
Crowd driving mechanism for the dipper stick of a power shovel, and also including a multiple V-belt and means for tensioning the same. An air supply inside the boom for cooling the belt and motor.
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