Supporting Method Of Ball Screw Pair

As a key component of rolling transmission, ball screw pair is widely used in various mechanisms that require positioning and transmission. In practice, the choice of the bearing method of the ball screw pair will affect the use effect of the entire mechanism. Each support method has its own characteristics, and the appropriate support method can be selected according to the needs. What is the support method of the ball screw pair?

    1. One end is fixed and the other is free. The support method has a simple structure, the axial rigidity of the lead screw is smaller than that of the two ends, the stability of the pressure rod is low, and the critical speed is low. For short lead screws and straight rods with low stroke and low speed, a cantilevered support structure can be used.

    2. Walk at both ends. The installation method of the support at both ends belongs to one end installation, which is suitable for the occasion of medium speed operation.

    3. One end is fixed and one end moves. For a long horizontal installation screw with high precision and medium speed, in order to prevent the influence of thermal deformation on the extension of the screw, a support with one end axially fixed is usually used.

    4. Both ends are fixed. For high-precision, high-speed rotating ball screw pairs, both ends should be fixed with mounting brackets. In order to apply a pre-tightening force to the lead screw, both ends can be fixed, and a butterfly spring and an adjusting nut can be installed at one end of the lead screw, so that the lead screw has a pre-tightening force, and at the same time, the spring can compensate the thermal deformation of the lead screw, so that the Keep the preload almost constant. This support method has high rigidity. As long as the bearing has no clearance, the axial rigidity of the screw is 4 times that of one end being fixed.

    You can choose different support methods according to your own use environment. After the above description, I believe everyone has a clear understanding of how to choose. If you still have questions, you can call for consultation, and we will arrange relevant technical personnel to answer you online 24 hours a day.