Linear ultrasonic motor based on alternating force and electric excitation method

A linear ultrasonic motor, alternating force technology, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the tangential alternating force linear ultrasonic motor that has not yet been seen and other problems, to achieve the effect of simple structure, small size and high speed

CN102025287BInactive Publication Date: 2012-12-26NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-12-26
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention relates to a linear ultrasonic motor based on alternating force, comprising a stator and a mover, wherein the stator is formed by butting a left Lanvgein vibrator and a right Lanvgein vibrator along a central line, each Lanvgein vibrator is integrally in a structure of a continuous section bar with a section gradually reducing from the tail part to the head part, the heads of the left Lanvgein vibrator and the right Lanvgein vibrator are butted to form a whole body, a clamping piece is arranged at the lower part of each Lanvgein vibrator and is installed among a set of piezoelectric ceramic pieces, two pre-tightening force bolts are respectively arranged at both ends of the stator, a piezoelectric ceramic piece for a drive foot is adhered to the butting part of the two Lanvgein vibrators parallel to the surfaces of longitudinal vibration surfaces of the vibrators, and an electrode slice and a friction sheet are adhered to the piezoelectric ceramic piece for the drive foot to form the drive foot; and the mover is a linear guide rail, forms a cruciform structure with the stator and is contacted with the stator on the drive foot. The motor supplies a novel drive mode with force variation as a basis without relating to the problem of the consistency of vibration mode frequency, and therefore, structure design of the linear ultrasonic motor is easier, and the output force is stronger.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a linear ultrasonic motor based on alternating force and its working mode and electric excitation mode, belonging to the technical field of ultrasonic motors. Background technique

[0002] Ultrasonic motor is a new type of power output device that utilizes the inverse piezoelectric effect of piezoelectric ceramics and ultrasonic vibration. Compared with electromagnetic motors, it has the advantages of compact structure, low-speed high-torque, fast response (milliseconds), power-off self-locking, good position and speed control, no electromagnetic interference, and low-noise operation. It is used in aerospace, micro Machinery, robots, precision instruments, servo mechanisms, medical devices and other fields have broad application prospects.

[0003] Linear ultrasonic motors belong to a category of ultrasonic motors. According to the structure of the stator of the linear ultrasonic motor is a plate and a rod (or a combined stru...

Examples

Embodiment Construction

[0018] A linear ultrasonic motor based on alternating force such as figure 1 As shown, it includes the stator and the mover. The stator is mainly composed of two Langevin vibrators on the left and right butt joints along the center line. Each Langevin vibrator consists of a front cover 3, a rear end cover 2, a piezoelectric ceramic sheet 6 and a Composed of electrode sheets 5, and the overall cross-section is a continuous cross-section rod structure that tapers from the tail to the head. The heads of the two Langevin vibrators on the left and right are butted and connected as a whole. In addition, the joints of the two Langevin vibrators are parallel to the A piezoelectric ceramic sheet 4 for driving feet is pasted on the surface of the bending vibration surface of the vibrator, and an electrode sheet 5 and a friction sheet 8 are pasted on the piezoelectric ceramic sheet 4 for driving feet to form a driving foot. The mover is a linear guide rail 1 Arranged in a "cross" shape w...