【摘要】 讨论了滑动螺旋副和滚动螺旋副螺杆式启闭机的特点及不足，介绍了一种新型滚珠螺杆式启闭机。该机不仅重量轻、功率小、效率高，而且适用于手动、手电两用和电动螺杆式启闭机更多还原

【Abstract】 Based on discussion of the screw hoist with moving screw pair and the screw hoist with rolling screw pait,a new type of ball screw hoist is introduced in the paper.The screw hoist is not only efficient,but also suitable to the screw hoist which is driven by hand,both with hand and electric,and electric.更多还原