Rotation linear permanent magnetism motor

Abstract

The invention provides a rotation linear permanent magnetism motor, comprising a stator, a rotor and a mechanical decoupling device. The stator and the rotor are arranged in a supporting base. The stator comprises a stator iron core, a rotation armature winding and a linear armature winding. The rotor comprises a rotor iron core and a rotor permanent magnet. The mechanical decoupling device comprises a rotation bearing, a sliding support and a sliding guide rail. The sliding support and a rotor internal shaft are connected through the rotation bearing. The sliding support is arranged on the slide guide rail. The sliding support moves relative to the sliding guide rail in axial direction of the rotor internal shaft. Within the scope of an axial length of the stator iron core, the rotor internal shaft, an air bearing, an annular lug of the supporting base, the rotor iron core, the rotor permanent magnet, the linear armature winding, the rotation armature winding and the stator iron core are sequentially arranged in the radial direction of the rotation linear permanent magnetism motor from inside to outside. The rotation linear permanent magnetism motor provided by the invention achieves multi-freedom motion of the single motor, and increases operating precision and efficiency of the motor.

Description

technical field [0001] The invention relates to the field of motors, in particular to a rotary linear permanent magnet motor. Background technique [0002] Traditional motors generally can only provide single-degree-of-freedom motion (rotary motion or linear motion), but cannot realize compound motion of rotation and linear motion. However, in systems such as robotic joints, industrial production, processing, and assembly, it is often necessary to achieve multi-freedom motion. Usually, this kind of multi-degree-of-freedom motion is realized by mechanical splicing and combination of basic elements that can perform linear or rotational motion, but this method has the following problems: First, because there are mechanical elements in its functional parts, Its friction, wear and deformation are relatively serious; second, the rotary motion and linear motion are coupled and cannot be controlled independently; third, the accuracy of this actuator is limited by machining; fourth,...

AI Technical Summary

Problems solved by technology

Usually, this kind of multi-degree-of-freedom motion is realized by mechanical splicing and combination of basic elements that can perform linear or rotational motion, but this method has the following problems: First, because there are mechanical elements in its functional parts, Its friction, wear and deformation are relatively serious; second, the rotary motion and linear motion are coupled and cannot be controlled independently; third, the accuracy of this actuator is limited by machining; fourth, the use of multiple motors to control Not only will it increase the size and weight of the device, but it will also bring inconvenience to the control

PCT patent WO2008 / 096519A1 discloses a rotary linear motor. The stator of this motor has two sets of windings, namely the rotary armature winding and the linear armature winding. The polarity is the same in the direction of rotation and axial line, and the polarity is opposite to that of the oblique direction, but the permanent magnet installation of this structure is complicated

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