自锁是机械上广泛存在着的一种现象,产生这种现象是有其特定条件的。在机械中,有些机构要求产生自锁,有些则要求防止自锁发生。下面从构件的移动和转动两个方面,来谈谈自锁现象产生的条件以及它在农业机械中利用或防止的一些情况。对于移动构件来说,存在一个摩擦角_m 的问题。因为 tg_m=f(f 为摩擦系数),所以知道了 f,就可查表得知_m。如果驱动力的施力方向在摩擦角_m 外_m),物块 A 移动;如果在摩擦角_m 的边线 Self-locking is a phenomenon that exists widely in machinery, and this phenomenon has its own specific conditions. In machinery, some agencies require self-locking, while others require that self-locking be prevented. The following two aspects from the movement and rotation components to talk about the conditions of self-locking phenomenon and its use in agricultural machinery or to prevent some of the situation. For moving components, there is a problem of friction angle _m. Because tg_m = f (f is the coefficient of friction), so know f, you can check the table that _m. If the driving force is applied in the friction angle _m outside _m), the block A moves; if the friction angle _m edge line