Direct drive type precise micro displacement actuator for polar environment

A direct-drive, micro-displacement technology, used in instruments, installations, optics, etc., to achieve compact structure, improve output accuracy, and facilitate manufacturing

Active Publication Date: 2015-04-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no related commercial products in China, so it is necessary for my country to speed up the development of low-temperature micro-displacement actuators, master its independent intellectual property rights as soon as possible, improve its own large-scale splicing mirror active optical telescope manufacturing capacity, and build large-scale splicing mirrors in polar regions. Get a head start on the wave of telescopes to advance Antarctic astronomy

Method used

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  • Direct drive type precise micro displacement actuator for polar environment
  • Direct drive type precise micro displacement actuator for polar environment
  • Direct drive type precise micro displacement actuator for polar environment

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specific Embodiment approach 1

[0020] Specific implementation mode one: combine figure 1 , figure 2 and image 3 Explain that a direct-drive precision micro-displacement actuator for polar environments in this embodiment includes a motion support mechanism, a drive mechanism and an anti-backlash screw transmission mechanism;

[0021] The motion support mechanism includes a flexible shaft 1, an end cover 10, a housing 18 and a bottom cover 19, the housing 18 is a housing with open ends, and the end cover 10 and the bottom cover 19 are respectively mounted on both ends of the housing 18;

[0022] The driving mechanism includes an elastic coupling 17, a motor connecting plate 8 and a stepping motor 9, the motor connecting plate 8 is installed in the housing 18, the stepping motor 9 is installed on the motor connecting plate 8, and the output shaft of the stepping motor 9 is horizontal arrangement, an elastic coupling 17 is installed on the output shaft of the stepper motor 9;

[0023] The anti-backlash scr...

specific Embodiment approach 2

[0028] Specific implementation mode two: combination Figure 1-Figure 2 Note that the threads of the drive nut 4, the threads of the anti-backlash nut 13 and the threads of the screw rod 11 in this embodiment are all precision trapezoidal threads with a small pitch of 0.1mm-0.2mm.

[0029] The screw rod 11, transmission nut 4 and anti-backlash nut 13 of this embodiment all adopt precision trapezoidal thread, which has a small pitch, which can ensure that the stepper motor 9 outputs a small displacement for each revolution of the transmission nut 4, and cooperates with electric subdivision control. The stepper motor has a unidirectional output displacement accuracy of less than 1 micron. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific implementation mode three: combination Figure 1-Figure 2 Note that between the transmission nut 4 and the screw rod 11 , between the anti-backlash nut 13 and the screw rod 11 , and between the drive rod 3 and the end cover 10 are all coated with a layer of low-temperature extreme pressure grease.

[0031] In this embodiment, between the drive nut 4 and the screw rod 11, between the anti-backlash nut 13 and the screw rod 11, and between the drive rod 3 and the end cover 10 are all coated with low-temperature extreme pressure grease, which can reduce the size of the drive rod 3, the end Cover 10, screw rod 11, transmission nut 4 and anti-backlash nut 13 wear, and ensure that the actuator still has a good lubrication effect under the special conditions of outputting a large load force and low temperature in the polar region, and the actuator can be stable in the polar alpine region , Low-wear operation. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a direct drive type precise micro displacement actuator for a polar environment, and relates to the precise micro displacement actuator. The precise micro displacement actuator aims to solve the problem that no supporting and adjusting mechanism exists for a large spliced mirror surface telescope panel under the polar low-temperature environment. The precise micro displacement actuator comprises a movement supporting mechanism, a drive mechanism and an anti-backlash screw transmission mechanism. The movement supporting mechanism comprises a flexible shaft, an end cover, a shell and a bottom cover. The shell is open at the two ends, and the end cover and the bottom cover are arranged at the two ends of the shell in a covering mode. The drive mechanism comprises an elastic coupling, a motor connection plate and a stepping motor. The anti-backlash screw transmission mechanism comprises a guidance key, a drive rod, a transmission nut, a spring sleeve, a screw rod, pretightening springs, an anti-backlash nut and anti-rotation bolts. The direct drive type precise micro displacement actuator is used for multi-point supporting and adjusting a sub mirror panel of a spliced mirror surface astronomical telescope.

Description

technical field [0001] The invention relates to a precision micro-displacement actuator, in particular to a direct-drive precision micro-displacement actuator used in polar regions to split mirror astronomical telescopes. This micro-displacement actuator works in groups and is mainly used for multiple The invention relates to point support and adjustment of a sub-mirror panel of a spliced ​​mirror astronomical telescope, belonging to the technical field of spliced ​​mirror active optics. At the same time, it can also be applied to occasions such as precision micro-displacement mechanisms under low temperature conditions. Background technique [0002] With the development of astronomy, astronomers need astronomical telescopes with larger apertures to detect dark matter, dark energy and even extraterrestrial life. However, there are many bottlenecks in the development of single-mirror astronomical telescopes in the process of increasing the aperture, so active optics technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/183
CPCG02B7/183
Inventor 白清顺王群邵忠喜娄铮张庆春梁迎春
Owner HARBIN INST OF TECH
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