What is the force direction of worm and worm gear?
1 Answers
In worm and worm gear transmission, the determination method of the worm gear's rotation direction can be judged by drawing a velocity vector triangle perpendicular to the worm gear's axis based on the direction at the meshing point K and the direction (parallel to the tangent of the helix). Alternatively, it can be determined using the rule of "right-hand worm with left-hand grip, left-hand worm with right-hand grip, four fingers and thumb". Additional information: 1. The worm and worm gear must have the same helix direction to engage properly: a right-hand helix means the right side is higher than the left side and upward, while a left-hand helix means the left side is higher than the right side and upward. The force is essentially the squeezing force on the inclined surface. The self-locking condition occurs when the inclination angle of the surface is small enough that the frictional force of the pressure exceeds the component force of the inclined surface, preventing rotation under such pressure conditions. 2. The helix direction of the worm gear and worm is determined by the helix direction of the worm: for a worm and worm gear combination with the same helix direction, the relationship between the worm gear's rotation direction and the worm's rotation direction remains the same. For example, when the worm rotates forward, the worm gear reverses, and when the worm reverses, the worm gear rotates forward. If it is required that the worm gear rotates forward when the worm rotates forward, the helix direction of the worm must be changed. Therefore, the rotation relationship between the worm gear and worm is already determined by the helix direction of the worm.
