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(一)前言蜗杆传动是齿轮传动的一个分枝。目前,已经有多种蜗杆传动的类型,使用于各种机械设备和仪器中。它们的共同特点是被用来传送空间交叉轴(一般为正交轴)之间的旋转运动,工作平稳,减速比可做得很大,在一定条件下可以实现自锁。按照使用场合和作用目的不同,区分为动力蜗杆传动和精密分度蜗杆传动两大类。动力蜗杆传动的任务,主要是按照一定运动关系传送动力,因而希望有尽可能高的机械强度和效率,以便结构紧凑,省料省工,而且经久耐用。而精度要求一般不高于7级。实际上,由于重负荷造成的轮齿变形,齿部加工时做得严格准确不加修正,对改善负荷能力反而不利。精
(A) Foreword Worm drive is a branch of gear drive. Currently, there are many types of worm drive that are used in a variety of machinery and equipment. Their common feature is that they are used to transmit rotational movement between the cross-axes (usually orthogonal axes) of the space, work smoothly, and the reduction ratio can be made large enough to achieve self-locking under certain conditions. In accordance with the use of the occasion and the purpose of different, divided into power worm drive and precision indexing worm drive two categories. Power worm drive mission, mainly in accordance with the transmission of kinetic energy, and therefore hope to have the highest possible mechanical strength and efficiency, in order to compact, save labor and labor-saving, and durable. The accuracy requirements are generally not higher than 7. In fact, due to heavy tooth deformation caused by gears, tooth processing done strictly accurate uncorrected, to improve the load capacity but adverse. fine