A small curve in the sliding part of the convex top of the lower nut acts as the wedge.

下螺母凸顶的滑动零件上有一条小弧线充当楔块。

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One end of a connecting rod on both sides of the screw nut is connected with the pin of a sliding chassis, and the other end is hinged with the screw nut.

螺母两侧的连接杆一端与滑动机架上的销轴连接，另一端与螺母铰链。

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By the use of double hidden layered BP artificial neural network a mathematical model of relationship between wear rate of screw-nut pair and sliding speed is established.

用双隐层BP人工神经网络，建立了丝杆螺母副的磨损率与滑动速度关系的数学模型。

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