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Thrust ball rotor supported micro-cylinder ultrasonic motor

An ultrasonic motor, rotor support technology, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc. Design and processing problems, to achieve the effect of short structure, simple structure and easy processing

Active Publication Date: 2012-09-05
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the above method is complicated, and the processing of the connecting parts is difficult, which directly affects the miniaturization design and processing of the motor.

Method used

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  • Thrust ball rotor supported micro-cylinder ultrasonic motor
  • Thrust ball rotor supported micro-cylinder ultrasonic motor
  • Thrust ball rotor supported micro-cylinder ultrasonic motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The thrust ball rotor supported miniature cylindrical ultrasonic motor of the present invention is composed of a rotor 2, a steel ball 4, a stator upper matching block 5, a stator lower matching block 7, piezoelectric ceramics 6, connectors 8, fixing nuts and gaskets. The upper matching block of the stator and the lower matching block of the stator can be connected through a threaded matching mechanism, or can be threaded with the shaft (shaft sleeve). They clamp piezoelectric ceramics and lock them into a stator. The upper matching block of the stator is slotted to amplify the stator vibration. Stator diameter 4mm.

[0021] Such as figure 2 shown. The stator and the end cover 1 are fixedly connected with the shaft 3 directly. The rotor is processed into a ring shape, leaving a certain bottom surface to support the steel ball, the rotor and the shaft are separated, and the steel ball is used as the axial and radial support workpiece of the rotor at the same time. Th...

Embodiment 2

[0024] The thrust ball rotor supported miniature cylindrical ultrasonic motor of the present invention is composed of a rotor, a steel ball, an upper matching block on a stator, a lower matching block on a stator, piezoelectric ceramics, a bearing, a fixing nut and a washer. The upper matching block of the stator and the lower matching block of the stator can be connected through a threaded matching mechanism, or can be threaded with the shaft (shaft sleeve). They clamp piezoelectric ceramics and lock them into a stator. The upper matching block of the stator is slotted to amplify the vibration of the stator.

[0025] The surface of the rotor and the bottom surface of the end cover are processed with arc-shaped grooves for ball rolling, and the steel balls in the groove can bear large axial loads. Both the end cover and the stator are fixedly connected to the shaft, and the rotor is connected to the shaft through a bearing. The preload is applied through the nut gasket above t...

Embodiment 3

[0028] The thrust ball rotor supported miniature cylindrical ultrasonic motor of the present invention is composed of a rotor, a steel ball, an upper matching block on a stator, a lower matching block on a stator, piezoelectric ceramics, a bearing, a fixing nut and a washer. The upper matching block of the stator and the lower matching block of the stator are screw fit mechanisms. They clamp piezoelectric ceramics and lock them into the stator. The upper matching block of the stator is slotted to amplify the vibration of the stator.

[0029] The surface of the rotor and the bottom surface of the end cover are processed with arc-shaped grooves for ball rolling, and the steel balls in the grooves can bear certain axial loads. The rotor is fixedly connected to the shaft, and the end cover and stator are connected to the shaft through bearings. The pre-pressure is applied on the end cover through the nut gasket, and the pressure is evenly distributed on each steel ball, so that th...

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Abstract

The invention discloses a thrust ball rotor supported micro-cylinder ultrasonic motor. A stator is provided with an upper stator matching block and a lower stator matching block which are installed on an axis; piezoelectric ceramics are arranged between the upper stator matching block and the lower stator matching block; the upper end of the upper stator matching block is provided with a rotor, and the upper end of the rotor is provided with an end cover; the rotor surface and the bottom surface of the end cover are provided with an arc-shaped groove for rolling balls, and the balls are arranged in the groove. The mechanism of the motor has the functions of supporting and fixing the rotor axially and radically; and the face-face contact between the stator the rotor is not influenced by the mechanism. The thrust ball rotor supported micro-cylinder ultrasonic motor has all the advantages of a cylindrical ultrasonic motor; simultaneously, the structure is simpler, and easier to be processed; and compared with common cylindrical ultrasonic motors, the size of the structure is shorter, thereby being beneficial to the micro design of motors.

Description

Technical field: [0001] The invention relates to a cylindrical ultrasonic motor, in particular to a thrust ball rotor supported miniature cylindrical ultrasonic motor, which belongs to the technical field of ultrasonic motor manufacturing. Background technique: [0002] With the development of micro-machines, high requirements are placed on micro-motors capable of precise positioning and high output torque. The working principle and structural form of the ultrasonic motor bring great convenience to the miniaturization design and processing, and the ultrasonic motor has a high energy density, and the conversion efficiency will not be reduced after miniaturization. These are the further miniaturization design of the ultrasonic motor. Guarantee provided. Ultrasonic motor is a new type of micro motor using the inverse piezoelectric effect of piezoelectric ceramics and ultrasonic vibration. Among them, the cylindrical traveling wave ultrasonic motor is a kind of traveling wave u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/16
Inventor 顾菊平张华金龙胡敏强华亮徐志科
Owner NANTONG UNIVERSITY
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