Screw rotating device capable of automatically disengaging threads

Abstract

The invention provides a screw rotating device capable of automatically disengaging threads, and belongs to the technical field of manufacturing equipment. The screw rotating device comprises a motor, a transmission shaft and a screw rod, the transmission shaft and the screw rod are connected through an automatic thread disengaging assembly, the automatic thread disengaging assembly comprises an outer sleeve and an inner cylinder, the outer sleeve is fixedly connected with the transmission shaft, the screw rod is fixedly connected with the inner cylinder, and the outer sleeve is sleeved outside the inner cylinder and is relatively and fixedly connected with the inner cylinder through an elastic piece; and in a normal state, the motor drives the transmission shaft to rotate, the outer sleeve, the inner cylinder and the screw rod are sequentially driven to synchronously rotate, when rotation of the screw rod is limited, the inner cylinder and the outer sleeve are separated from a fixed connection state, the outer sleeve can slip and rotate outside the inner cylinder, and automatic thread disengaging of the screw rod is achieved. According to the invention, the screw rod and the transmission shaft are not fixedly connected but are relatively fixedly connected through the automatic thread disengaging assembly, the normal condition is that the screw rod and the transmission shaft synchronously rotate, and when the rotation of the screw rod is limited, the screw rod and the transmission shaft are disconnected, and the screw rod does not excessively rotate along with the transmission shaft, so that the screw rod is protected.

Description

technical field [0001] The invention belongs to the technical field of manufacturing equipment, and relates to a displacement transmission structure, in particular to a screw rotating device for automatic tooth removal. Background technique [0002] In modern automated mechanical equipment, it often involves the movement of objects, which are usually driven by motors, cylinders and other driving parts. For example, the screw motor is a type of motor that converts the rotational motion of the motor into linear motion. Its main Including the motor body and the screw assembly, the screw assembly includes the screw and the slider, the shaft of the motor body is connected to the screw through the coupling, so as to drive the screw to rotate, and the screw rotates to drive the slider to slide linearly, thus converting the rotational motion of the motor into a straight line sports. In the existing screw motor, the rotating shaft and the screw are connected by a coupling, and the r...

AI Technical Summary

Problems solved by technology

[0003] However, when the screw motor is actually used, the rotation of the motor shaft has a certain inertia, and the screw tends to over-rotate. If the slider on the screw is stuck by the limit, the over-rotation of the screw will affect the screw opening of the screw and the slider. Cause damage, long-term wear will reduce the accuracy of slider movement, which is very unfavorable to assembly

Especially for large-scale equipment, it needs to be equipped with a motor with greater power as the driving part. Its torque is greater, and the inertia driven by it during rotation is also stronger. The more difficult it is to control the rotation accuracy of the screw, the screw and slider are often easily damaged. Its service life has virtually increased production costs and labor intensity, and this phenomenon needs to be resolved

Images