: 蜗杆与蜗轮的旋转方向，其规律类似螺旋传动，蜗杆相当于螺杆，蜗轮相当于螺母，所不同的是螺母可以作直线运动，而蜗轮只能做旋转运动。 Gear reducer : The direction of rotation of the worm and worm gear is similar to that of helical transmission. The worm is equivalent to a screw and the worm is equivalent to a nut. The difference is that the nut can move linearly, but the worm can only rotate. ( 右旋较常用 ) ，若按空心箭头方向旋转 ( 从蜗杆轴线左端观察，为顺时针旋转 ) ，在蜗杆不能轴向移动的情况下，蜗轮这个“螺母”就只能向左移动，也就是说蜗轮要做顺时针方向旋转。 This is a right-handed worm ( right-handed is more commonly used ) . If you rotate in the direction of the hollow arrow ( viewed from the left end of the worm axis, it is clockwise ) . When the worm cannot move axially, the "nut" of the worm can only move Moving to the left means that the worm gear must rotate clockwise. Judging by the "right-hand rule" is also very simple. When the worm is a right-handed thread, the direction of the right hand's four fingers bending represents the direction of the worm's rotation, and the worm's rotation direction is opposite to the direction of the thumb. For the left worm, use the "left-hand rule."
In worm drive, when the worm is turned, he will receive a large axial force. The direction of the axial force is related to the direction of rotation of the worm and the direction of thread rotation. : “右手定则”或“左手定则”判断轴向力的方向。 Also available : "Right Hand Rule" or "Left Hand Rule" to determine the direction of axial force. When judging, the direction of the thumb is the direction of the axial force on the worm. When identifying, the thumb is the direction of the axial force on the worm. In order to offset the axial force of the worm and prevent the worm from moving axially, a thrust bearing or other axial support structure should be installed.