What is the structure of the spiral elevator? What is the working principle?

Screw elevator is usually called screw transmission mechanism, which is mainly used to convert rotary motion into linear motion or linear motion into rotary motion. It can be divided into sliding friction structure and rolling friction structure.

Spiral elevator structure:

1. Working principle There is a ball between the threaded raceway of the lead screw and the nut.

2. When the screw or nut rotates, the ball rolls along the threaded raceway, so rolling friction will occur when the screw and nut move relatively. In order to prevent the ball from rolling out of the raceway, return guide devices are arranged at both ends of the nut spiral groove.

3. They form a circulating loop with the threaded raceway, so the balls can circulate in the nut raceway.

Transmission form According to the combination of the relative motion of the lead screw and nut, there are two basic transmission forms of the lead screw elevator.

(1) The nut is fixed and the lead screw rotates and moves. Because the nut itself plays a supporting role, this transmission form eliminates the possible additional axial movement of the lead screw bearing. Simple structure and high transmission precision. But its axial dimension should not be too long, otherwise the rigidity is poor. So it is only suitable for small trips.

(2) When the screw rotates, the nut moves. This type of transmission needs to limit the rotation of the nut, so a guide device is needed. It is characterized by compact structure and good rigidity of the lead screw, and is suitable for occasions with large working stroke.

? Nanjing Youli Seiko is a good manufacturer of spiral elevators. If you have any questions, you can contact directly for consultation, and a professional customer service will contact you and make a more suitable plan for you according to your needs.