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这种虎钳可减轻劳动强度。开始夹紧工件时,首先摇动大手柄22,使大丝杠转动,带动螺母2前进,当钳口接触到要夹紧的工件时,停止摇动大手柄,改为摇动手柄19,使右链轮16转动,通过链条,带动链轮12同时转动。在链轮12的孔里有键13,通过键13拨动小丝杠10在螺母9里转动前进,这时小柱塞8就进入柱塞5的小油腔内
This kind of vise can reduce labor intensity. Start clamping the workpiece, the first large handle 22 shake, so that the large screw rotation, drive the nut 2 forward, when the jaws touch the workpiece to be clamped, stop shaking the big handle, instead of shaking the handle 19, so that the right sprocket 16 rotates, through the chain, sprocket 12 driven at the same time rotating. In the hole of the sprocket 12, there is a key 13, and the small screw 10 is pushed and rotated in the nut 9 by the key 13 to advance, at this time, the small plunger 8 enters the small oil chamber of the plunger 5