CN112987275A

CN112987275A - Annular elevating platform

Info

Publication number: CN112987275A
Application number: CN202110376913.3A
Authority: CN
Inventors: 江海; 李胜龙
Original assignee: Jiancheng Technology Shaoxing Co ltd
Current assignee: Jiancheng Technology Shaoxing Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-06-18

Abstract

The invention provides an annular lifting platform which comprises an annular base, wherein a lifting module is arranged on the annular base, a horizontal table surface is arranged on the lifting module, the lifting module comprises a base, a slide rail is arranged on a unit, a lifting vertical panel is connected on the slide rail in a sliding mode, mounting grooves are formed in the base and correspond to two sides of the lifting vertical panel, piezoelectric motors are arranged in the mounting grooves, and driving feet of the piezoelectric motors are connected with the lifting vertical panel.

Description

Annular elevating platform

Technical Field

The invention relates to the technical field of microscopes, in particular to an annular lifting platform.

Background

The precision electric lifting platform is a conventional electromechanical device applied to automation, instruments and meters. One typical application is the sample stage of a biomedical microscope for lifting and lowering a sample for optical focusing. Due to the limited space of the microscope, the high precision of focusing and the requirement that the sample needs to be placed in the middle of the object stage, the lifting platform is generally designed into an annular structure, and the hollow part in the middle is used for placing the sample, such as a glass slide, a culture dish or other sample carriers. The design and manufacture of the compact and thin annular lifting platform with high precision and certain stroke have certain technical difficulty. Conventional electromagnetic motors cannot be used for driving this type of lift table due to their large size and limited accuracy. At present, a piezoelectric actuator is generally adopted, namely, a lifting platform is driven by utilizing the deformation of a piezoelectric material under an electric field and the over-deformation. Because the deformation quantity of the piezoelectric material is limited, the stroke of the lifting platform is improved by the principle of lever amplification. But even with lever amplification, the stroke is typically only 200 and 500 microns. A compact, high precision annular stage with a stroke of more than 500 microns remains a goal of this device.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an accurate annular lifting platform with long stroke, which solves the problems in the prior art.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an annular elevating platform, includes annular base, be equipped with the lift module on the annular base, be equipped with the horizontal table face on the lift module, the lift module includes the base, be equipped with the slide rail on the unit, sliding connection has the perpendicular panel of lift on the slide rail, the both sides that correspond the perpendicular panel of lift on the base are equipped with the mounting groove, be equipped with piezoelectric motor in the mounting groove, piezoelectric motor's drive foot is connected with the perpendicular panel of lift.

Furthermore, the lifting module is provided with two sides which are respectively positioned on the horizontal table surface.

Furthermore, a feedback module is arranged on the annular base.

Furthermore, the feedback module comprises a grating reading head fixed on the annular base, a grating ruler mounting seat is fixed on the horizontal table top, and a grating ruler is arranged on the grating ruler mounting seat.

Furthermore, a cover plate is arranged on the mounting groove.

(III) advantageous effects

In summary, the piezoelectric motor adopted by the invention has no screw rod mechanism required by a common electromagnetic motor, so that the size of the whole lifting body is reduced. Meanwhile, the piezoelectric motor has extremely high stepping precision, so that the moving precision of the lifting platform is greatly improved, and the lifting platform has theoretically infinite stroke.

Drawings

FIG. 1 is a schematic structural diagram of an annular elevating platform according to the present invention;

FIG. 2 is a schematic structural diagram of the lifting module;

FIG. 3 is a cross-sectional view of the lift module;

FIG. 4 is a schematic view of a part of the structure of an annular elevating platform according to the present invention;

FIG. 5 is a schematic view of a second embodiment of the annular elevating platform of the present invention;

FIG. 6 is a schematic view of a part of the structure of an annular elevating platform according to the present invention;

FIG. 7 is a side cross-sectional view of an annular lift table of the present invention.

Description of the labeling: 1. an annular base; 2. a lifting module; 3. a horizontal table top; 4. a feedback module; 2-1, a base; 2-2, guide rails; 2-3, lifting the vertical panel; 2-4, a piezoelectric motor; 2-5, a cover plate; 4-1, a grating ruler mounting seat; 4-2, grating ruler; 4-3, grating read head.

Detailed Description

An embodiment of an annular elevating platform according to the present invention will be further described with reference to fig. 1 to 7.

The annular lifting platform comprises an annular base 1, wherein a lifting module 2 is arranged on the annular base 1, a horizontal table top 3 is arranged on the lifting module 2, the lifting module 2 comprises a base 2-1, a sliding rail 2-2 is arranged on the unit, a lifting vertical panel 2-3 is connected onto the sliding rail 2-2 in a sliding mode, mounting grooves are formed in two sides, corresponding to the lifting vertical panel 2-3, of the base 2-1, piezoelectric motors 2-4 are arranged in the mounting grooves, and driving feet of the piezoelectric motors 2-4 are connected with the lifting vertical panel 2-3.

The piezoelectric motors 2-4 (or called ultrasonic motors, ultrasonic motors) utilize the inverse piezoelectric effect of piezoelectric materials, that is, piezoelectric ceramic materials deform under the action of an electric field to drive the rotor of the motor to move. According to the driving mode, a linear piezoelectric motor 2-4 and a rotary piezoelectric motor 2-4 can be divided. The piezoelectric motor 2-4 adopted by the invention is a type that the motor driving foot is directly contacted with the pushed slide block, and the piezoelectric motor 2-4 adopted by the invention does not have a screw rod mechanism required by a common electromagnetic motor, so that the size of the whole lifting body is reduced. Meanwhile, because the piezoelectric motors 2-4 have extremely high stepping precision, the moving precision of the horizontal table top 3 is greatly improved, the practical application reaches 10nm minimum step distance, the +/-20 nm bidirectional repeated positioning precision is realized based on the piezoelectric motor 2-4 driving principle, the lifting table can have theoretically infinite stroke while having the ultrahigh precision of the 10nm minimum step distance and the +/-20 nm bidirectional repeated positioning precision, the practical use is limited by the length of the driving sheet 9, but the lifting table can easily break through 300mm and far exceeds 500 mu m of the lifting table driven by the piezoelectric brake, and the invention has the advantages of simple integral structure, small volume, large stroke range, high precision and easy popularization and use

The preferred lifting module 2 of this embodiment is equipped with two and is located the both sides of horizontal mesa 3 respectively, and piezoelectric motor 2-4 is driven by same driver in this embodiment to reach the purpose of each motor synchronous drive, can make horizontal mesa 3 atress even stable.

In this embodiment, the annular base 1 is preferably provided with a feedback module 4 for detecting and timely feeding back the motion data of the horizontal table top 3.

The feedback module 4 preferably includes a grating reading head 4-3 fixed on the annular base 1, the horizontal table 3 is fixed with a grating ruler 4-2 mounting seat 4-1, the grating ruler 4-2 mounting seat 4-1 is provided with a grating ruler 4-2, the feedback module 4 can also be a feedback device such as a magnetic grating and a capacitance position, in this embodiment, a high-precision full closed-loop system is formed by adopting the grating, the piezoelectric motor 2-4, the horizontal table 3 and the position feedback of the grating, and the high-precision full closed-loop system can precisely operate and control the upper and lower positions of the horizontal table 3 or the observed sample.

In the preferred embodiment, the mounting groove is provided with a cover plate 2-5 for fixing the piezoelectric motor 2-4 in the mounting groove.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An annular elevating platform which characterized in that: the lifting die set comprises an annular base, a lifting die set is arranged on the annular base, a horizontal table top is arranged on the lifting die set, the lifting die set comprises a base, a sliding rail is arranged on the machine set, a lifting vertical panel is connected to the sliding rail in a sliding mode, mounting grooves are formed in the two sides of the base, corresponding to the lifting vertical panel, of the base, a piezoelectric motor is arranged in each mounting groove, and the driving feet of the piezoelectric motor are connected with the lifting vertical panel.

2. An annular elevating platform as claimed in claim 1, wherein: the lifting module is provided with two sides which are respectively positioned on the horizontal table-board.

3. An annular elevating platform as claimed in claim 1, wherein: and a feedback module is arranged on the annular base.

4. An annular elevating platform as claimed in claim 1, wherein: the feedback module comprises a grating reading head fixed on the annular base, a grating ruler mounting seat is fixed on the horizontal table top, and a grating ruler is arranged on the grating ruler mounting seat.

5. An annular elevating platform as claimed in claim 1, wherein: and a cover plate is arranged on the mounting groove.