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Piezoelectric driven linear motion device

A linear motion, piezoelectric drive technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of small driving force and complex structure

Active Publication Date: 2015-02-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing linear drive device with a single combined vibrator as the stator adopts bearings as the supporting structure, the driving force is small and the structure is complicated, and to provide a piezoelectric drive linear motion device

Method used

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  • Piezoelectric driven linear motion device
  • Piezoelectric driven linear motion device
  • Piezoelectric driven linear motion device

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0010] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this embodiment, a piezoelectric drive linear motion device of this embodiment includes an upper support frame 1, a lower support frame 8, a linear guide rail 7, a guide sleeve 12, two sets of pretensioning mechanisms 17 and two sets of stators, each set of stators Including two vibrators 18, each vibrator 18 includes a front end cover 10, a rear end cover 2, an electrode sheet 3 and a piezoelectric ceramic 4, and an electrode sheet 3 and a piezoelectric ceramic 4 are arranged between the front end cover 10 and the rear end cover 2 and The four are connected as one, the front end covers 10 of the two vibrators 18 of each set of stators are connected as a whole, and the angle β between the center lines of the two vibrators 18 is 30° to 90°, the joint of the two vibrators 18 In order to drive the foot 10-1, the upper support frame 1 and the lower support frame 8 are respectively arranged on the upper...

specific Embodiment approach 2

[0012] Specific implementation mode two: combination figure 2 and image 3 Describe this embodiment, each set of pretensioning mechanisms 17 in this embodiment includes a connecting rod 6, a first nut 16 and an elastic member 14, the connecting rod 6 passes through the upper support frame 1 and the lower support frame 8, and is located at the lower support frame 8 An elastic member 14 is pierced through the connecting rod 6 at the lower end, the lower end of the connecting rod 6 is threadedly connected with the first nut 16 , and the upper end of the connecting rod 6 is detachably connected with the upper supporting frame 1 . The elastic member of this embodiment is preferably an elastic member with low rigidity. In this embodiment, the compression amount of the elastic member is adjusted by tightening the first nut, and the driving feet of the upper and lower stators (two vibrators in each stator) are preloaded. To the linear guide rail, and realize the adjustment of the pr...

specific Embodiment approach 3

[0013] Specific implementation mode three: combination figure 2 and image 3 This embodiment will be described. The two elastic members 14 in this embodiment are both coil springs. The present embodiment preferably uses the little helical spring of rigidity, and the nut of this embodiment can be hexagonal nut, adjusts the compression amount of helical spring by tightening the first nut, the driving feet of two stators up and down (two in each stator) The vibrator) is preloaded onto the linear guide rail. Due to the small spring stiffness, the preload can be calculated quantitatively by quantitatively adjusting the compression of the spring, so that the preload can be applied quantitatively. Due to the small amount of wear, the preload caused by wear The amount of change is negligible, and the effect of adjusting the size of the pretightening force is better. Others are the same as in the second embodiment.

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Abstract

The invention discloses a piezoelectric driven linear motion device, and relates to a piezoelectric driven motion device, so as to solve the problems that the existing linear driving device which uses single combination vibrator as the stator adopts a bearing as a supporting structure, the driving force is smaller, and the structure is complex. The piezoelectric driven linear motion device comprises an upper supporting frame, a lower supporting frame, a linear guide rail, a guide sleeve, two sets of pre-tightening mechanisms and two sets of stators; the two sets of the stators are respectively arranged on the upper supporting frame and the lower supporting frame; one end of the upper supporting frame is rotationally connected with one end of the lower supporting frame; the other end of the upper supporting frame is connected with the other end of the lower supporting frame through the two sets of the pre-tightening mechanisms; the guide sleeve is rotationally connected with one side of the upper supporting frame; one end of the linear guide rail penetrates through the guide sleeve; the other end of the linear guide rail penetrates through the part between the two pre-tightening mechanisms and contacts with the two pre-tightening mechanisms; and two driving feet are right oppositely arranged on the linear guide rail positioned between the guide sleeve and the two pre-tightening mechanisms and respectively clamp the linear guide rail. The piezoelectric driven linear motion device is applied to the field of high thrust precision driving.

Description

technical field [0001] The invention relates to a piezoelectric drive motion device, in particular to a piezoelectric drive linear motion device with a combined vibrator as a stator. Background technique [0002] Piezoelectric drive linear motion devices are especially suitable for applications in precision drives, optical instruments, machine tool control and other fields. This device is mainly composed of stator (or vibrator), mover (or guide rail), support structure and pressurization system. In the work, the inverse piezoelectric effect of piezoelectric ceramics is used to generate oblique or elliptical motion in the driving part of the stator, and the mover is driven to move in a unidirectional or reciprocating linear motion by means of contact friction. [0003] At present, there are many forms of vibrator structures that realize linear motion. Among them, the combined vibrator is the most commonly used vibrator, which includes two structures. After searching the lite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02H02N2/04
Inventor 王培明曲建俊胡志勇王佳男郭文峰
Owner HARBIN INST OF TECH
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