CN107911044A - A kind of actuator stator structure - Google Patents

Abstract

The invention discloses a kind of actuator stator structure, including base, the stator being arranged on base and the mover for being arranged on base and being connected with stator contact, positioner is equipped between the base and stator, and stator is arranged on base by positioner, the stator includes stator plate, the amplifying unit structure being arranged on stator plate and the power set being connected with amplifying unit structure driven, and power set can promote amplifying unit structure motion, and mover is driven to be moved by amplifying unit structure；The beneficial effects of the invention are as follows：Stator is using piezoelectric stack as power set, it is possible to achieve micro-displacement acts, and the drive displacement amount of piezoelectric ceramics can be improved using piezoelectric stack, while has the advantages that low-power consumption, response are fast and fever is small.

Description

An actuator stator structure

technical field

The invention relates to the technical field of micro-displacement driving devices, in particular to an actuator stator structure.

Background technique

In recent years, with the continuous development and progress of science and technology, various new technologies have emerged, especially in aerospace, bionic technology, precision machinery, medicine, artificial satellites and other fields, which require high positioning capabilities. Moreover, with the diversification of machine working environments and applications, not only the actuators are required to have micron to nanometer high precision and precise motion control requirements, but also the actuators are expected to be miniaturized, lightweight and modularized. And it can be used safely in special occasions, such as electromagnetic field environment. Since most traditional actuators use electrothermal, electromagnetic or mechanical driving methods, for the requirements of current actuator design, traditional actuators cannot meet the requirements due to their working principles and structural types. This requires the research and development of new actuators with new driving methods to replace the transmission actuators used in specific occasions.

Contents of the invention

Aiming at the problems existing in the prior art, the invention provides an actuator stator structure with reasonable structure and short response time.

Technical scheme of the present invention is as follows:

An actuator stator structure, characterized in that it includes a stator base plate, an amplification unit structure arranged on the stator base plate, and a power device connected to the amplification unit structure in transmission, the amplification unit structure includes a first amplification unit and a first The amplifying unit is a second amplifying unit that is symmetrically arranged. The power device includes a horizontal power device and a vertical power device. Both the first amplifying unit and the second amplifying unit adopt a two-stage lever amplifying structure, including a first lever, a second A lever and a straight circular flexible hinge, the middle position of the first lever is provided with a first straight circular flexible hinge, and is connected with the horizontal power device through the first straight circular flexible hinge, thereby forming an equi-arm lever structure; One end of a lever is provided with a second straight circular flexible hinge and is fixedly connected to the stator bottom plate through the second straight circular flexible hinge, and the other end of the first lever is provided with a third straight circular flexible hinge. hinge, and is fixedly connected to the second lever through the third straight circular flexible hinge, and the fourth straight circular flexible hinge is arranged on the side of one end of the second lever, and is connected to the stator bottom plate through the fourth straight circular flexible hinge. The fifth straight circular flexible hinge is fixedly connected to one end of the second lever, and is connected to the vertical power device through the fifth straight circular flexible hinge. The end of the second lever is provided with a driving foot.

The stator structure of an actuator is characterized in that the power device adopts a piezoelectric stack structure, including a set of piezoelectric ceramic sheets, a set of internal electrodes, a set of insulators and external electrodes, and the piezoelectric Ceramic sheets, insulators, and internal electrodes are stacked in sequence, and connected to an external power supply circuit through the external electrodes.

The stator structure of the actuator is characterized in that a pre-tensioning device is provided on the bottom plate of the stator at a position close to the power device, and the pre-tensioning device includes a micrometer and a micrometer arranged on the micrometer. The contact ball is provided with a square pad between the contact ball and the power device, and is arranged in contact with the power device through the square pad.

The above-mentioned stator structure of an actuator is characterized in that the driving foot adopts a square structure.

The above mentioned actuator stator structure is characterized in that a cantilever beam is arranged on the bottom plate of the stator.

The above mentioned actuator stator structure is characterized in that the bottom plate of the stator is provided with a round hole for adjusting the positioning of the stator.

The beneficial effects of the present invention are:

1) The stator uses a piezoelectric stack as a power device, which can realize micro-displacement action. Using a piezoelectric stack can increase the driving displacement of piezoelectric ceramics, and has the advantages of low power consumption, fast response and low heat generation.

2) The stator adopts a two-stage lever amplifying structure, which not only has sufficient amplification capacity for displacement but also has a large load driving capacity, which effectively improves the driving efficiency of the actuator. Straight circular hinges are used between the two-stage lever amplifying structures , improving the motion sensitivity of the amplified structure.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic structural view of the power plant of the present invention;

In the figure: 1-stator, 101-stator bottom plate, 102-driving foot, 103-second lever, 104-second straight circular flexible hinge, 105-first lever, 106-first straight circular flexible hinge, 107 -horizontal power unit, 108-the third straight circular flexible hinge, 109-the fourth straight circular flexible hinge, 110-waist round hole, 111-the fifth straight circular flexible hinge, 112-vertical power unit, 113- Cantilever beam, 114-internal electrode, 115-insulator, 116-external electrode, 117-piezoelectric ceramic sheet, 118-micrometer head.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings of the description.

As shown in Figure 1-2, an actuator stator structure includes a stator 1, a stator bottom plate 101, a driving foot 102, a second lever 103, a second straight circular flexible hinge 104, a first lever 105, a first straight Round flexible hinge 106, horizontal power unit 107, third straight round flexible hinge 108, fourth straight round flexible hinge 109, waist round hole 110, fifth straight round flexible hinge 111, vertical power unit 112, cantilever Beam 113 , internal electrode 114 , insulator 115 , external electrode 116 , piezoelectric ceramic sheet 117 and micrometer head 118 . The stator 1 includes a stator bottom plate 101, an amplifying unit structure disposed on the stator bottom plate 101, and a power device that is transmission-connected to the amplifying unit structure, and the power device can push the amplifying unit structure to move.

The amplifying unit structure includes a first amplifying unit and a second amplifying unit symmetrically arranged with the first amplifying unit, and the power unit includes a horizontal power unit 107 and a vertical power unit 112, and the first amplifying unit and the second amplifying unit are both A two-stage lever amplification structure is adopted, including a first lever 105, a second lever 103 and a straight circular flexible hinge. A first straight circular flexible hinge 106 is provided in the middle of the first lever 105, and the The flexible hinge 106 is connected with the horizontal power device 107 to form an equi-arm lever structure; the first lever 105 is provided with a second straight circular flexible hinge 104 at one end face position and connects the stator base plate through the second straight circular flexible hinge 104. 101 are fixedly connected, the other end side of the first lever 105 is provided with a third straight circular flexible hinge 108, and is fixedly connected with the second lever 103 through the third straight circular flexible hinge 108, the second A fourth straight circular flexible hinge 109 is provided on one end of the lever 103, and is fixedly connected to the stator bottom plate 101 through the fourth straight circular flexible hinge 109. The circular flexible hinge 111 is connected to the vertical power device 112 through the fifth straight circular flexible hinge 111, and the end of the second lever 103 is provided with a driving foot 102.

The power device adopts a piezoelectric stack structure, including a group of piezoelectric ceramic sheets 117, a group of internal electrodes 114, a group of insulators 115 and external electrodes 116, and the piezoelectric ceramic sheets 117, insulators 115, and internal electrodes 114 are stacked in sequence , and connected to an external power supply circuit through an external electrode 116 .

On the stator bottom plate 101, a pre-tensioning device is provided at a position close to the power device, and the pre-tensioning device includes a micrometer head 118 and a contact ball arranged on the micrometer head 118, between the contact ball and the power device There is a square backing plate, which is set in contact with the power unit through the square backing plate.

A round hole 110 is provided on the stator bottom plate 101 at a position corresponding to the positioning device 5 for adjusting the positioning of the stator 1 .

The driving foot 102 adopts a square structure, which increases its contact area.

A cantilever beam 113 is arranged on the stator bottom plate 101 to facilitate preloading of the stator bottom plate 101 and improve the working performance of the stator.

The stator bottom plate 101 is provided with a round hole 110 for adjusting the positioning of the stator 1, which ensures the accurate positioning of the stator.

Claims (6)

1. An actuator stator structure, characterized in that it comprises a stator base plate (101), an amplifying unit structure arranged on the stator base plate (101), and a power device connected to the amplifying unit structure in transmission, and the amplifying unit structure includes The first amplifying unit and the second amplifying unit arranged symmetrically with the first amplifying unit, the power device includes a horizontal power device (107) and a vertical power device (112), the first amplifying unit and the second amplifying unit are both A two-stage lever amplification structure is adopted, including a first lever (105), a second lever (103) and a straight circular flexible hinge, and a first straight circular flexible hinge (106) is provided in the middle of the first lever (105) , and is connected with the horizontal power device (107) through the first straight circular flexible hinge (106), thereby forming an equi-arm lever structure; one end of the first lever (105) is provided with a second straight circular flexible hinge (104) and fixedly connected with the stator bottom plate (101) through the second straight circular flexible hinge (104), and the other end side of the first lever (105) is provided with a third straight circular flexible hinge (108 ), and is fixedly connected to the second lever (103) through the third straight circular flexible hinge (108), and the fourth straight circular flexible hinge (109) is provided on the side of one end of the second lever (103), and Through the fixed connection between the fourth straight circular flexible hinge (109) and the stator bottom plate (101), a fifth straight circular flexible hinge (111) is provided at one end of the second lever (103), and through the fifth The straight circular flexible hinge (111) is connected with the vertical power device (112), and the end of the second lever (103) is provided with a driving foot (102). 2. The actuator stator structure according to claim 1, characterized in that the power device adopts a piezoelectric stack structure, including a set of piezoelectric ceramic sheets (117), a set of internal electrodes (114) 1. A set of insulators (115) and external electrodes (116), the piezoelectric ceramic sheets (117), insulators (115), and internal electrodes (114) are stacked in sequence, and connected to an external power supply circuit through the external electrodes (116) . 3. The actuator stator structure according to claim 1, characterized in that, a pre-tensioning device is provided on the stator bottom plate (101) at a position close to the power device, and the pre-tensioning device includes a micrometer The head (118) and the contact ball arranged on the micrometer head (118), the contact ball and the power device are provided with a square backing plate, and are arranged in contact with the power device through the square backing plate. 4. The actuator stator structure according to claim 1, characterized in that, the driving foot (102) adopts a square structure. 5 . The actuator stator structure according to claim 1 , characterized in that, a cantilever beam ( 113 ) is arranged on the stator bottom plate ( 101 ). 6. The actuator stator structure according to claim 1, characterized in that, the stator bottom plate (101) is provided with a round hole (110) for adjusting the positioning of the stator (1).