Slender diameter piston type piezoelectric straight line motor

A linear motor and piston-type technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, piezoelectric devices/electrostrictive devices, generators/motors, etc., can solve the problem of low electromechanical energy conversion efficiency , Difficult to reduce the diameter of the driver structure, and the increase in the cost of the driver, etc., to achieve the effect of low power consumption, low cost, and stable output speed

Inactive Publication Date: 2008-04-16
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its main disadvantages are: 1) Since the piezoelectric film is arranged perpendicular to the moving direction of the mover, the diameter of the film cannot be too small, so it is difficult to further reduce the diameter of the driver structure; 2) The driver adopts a sawtooth waveform drive signal, work in a non-resonant state
Therefore, its electromechanical energy conversion efficiency is not high, and the driving circuit is more complicated, which is not good for control; 3) Due to the use of piezoelectric film, although it has the advantage of low voltage driving, it also increases the cost of the driver

Method used

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  • Slender diameter piston type piezoelectric straight line motor
  • Slender diameter piston type piezoelectric straight line motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Referring to Fig. 1 and Fig. 2, the thin-diameter piston type piezoelectric linear motor includes a tubular stator 1 and a mover 13 placed in the tubular stator 1, and the mover 13 is composed of upper and lower layers of slender sheet-like vibrators 3, 9 and left and right End two coupling heads 6,12 are formed. The mover 13 is a left-right symmetrical structure. There are protrusions 2 symmetrically distributed above and below the mover 13 . The boss 2 is a thin elastic pin. The elongated sheet vibrator 3, 9 is composed of a narrow strip of elastic metal sheet and piezoelectric actuators 10, 5, 8, 11, 4, 7 pasted on its upper and lower surfaces. The piezoelectric actuator used here is a piezoelectric ceramic sheet uniformly coated with silver electrodes on the upper and lower sides and polarized along the thickness direction, so the piezoelectric actuator is referred to as a piezoelectric ceramic sheet hereinafter. When pasting, ensure that the polarization directi...

Embodiment 2

[0042] Referring to Fig. 3 and Fig. 4, the thin-diameter piston-type piezoelectric linear motor is basically the same as the above-mentioned embodiment. The difference is that the structure of the connecting head 6, 12 is: a whole block, in the middle of which two layers of elongated vibrator 3, 9 are processed, and the two ends maintain the original block three-dimensional rectangular body to form the connecting head 6, 12. The protrusions 2 at the upper and lower ends of the two elongated sheet vibrators 3 and 9 are thin elastic sheets.

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Abstract

The invention relates to a thin-diameter piston-type piezoelectric linear motor, comprising a tubular stator and a mover arranged inside the tubular stator. The stator comprises an upper and lower slender strip oscillators (the coupling heads at both ends of either oscillator are connected in a permanent manner, and the upper and lower lug bosses are arranged on both ends and supported on the inner wall of the tubular stator). The invention adopts a slender structure, and can be used for two-way driving and control; the invention is characterized in a simple structure and user-friendly functions.

Description

technical field [0001] The invention relates to a miniature linear motor with both linear motion drive and control, in particular to a thin-diameter piston-type piezoelectric linear motor. Background technique [0002] With the development of electromechanical industry towards high precision, electromechanical products are rapidly miniaturized and thinned. In many fields such as information technology, semiconductor manufacturing, industrial testing, military cutting-edge equipment, biomedicine, aerospace, etc., the traditional linear motion drive method of screw plus rotary motor has become more and more difficult to meet the requirements, and there is an urgent need for hydraulic cylinders. Slim miniature linear motors are used as direct drives. However, the lateral size (perpendicular to the direction of linear motion output) of the currently developed miniature linear motors is generally too large, which limits its application in the above-mentioned fields. [0003] To...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/02H02N2/04H01L41/08
Inventor 李朝东许京荆姚华邵定国张燕燕
Owner SHANGHAI UNIV
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