Taper-rod expansion and contraction mechanism based on two-way spiral groove drive

Abstract

A conic rod stretching expansion mechanism based on two-way spiral groove drive comprises a guide barrel (1), a stretching expansion mechanism (001) and a supporting seat (20). The front end of the stretching expansion mechanism (001) is installed in the guide barrel (1), the rear end is installed in the supporting seat (20), and the front end conducts stretching motion along the inner wall of theguide barrel (1) under the power drive effect. Two-way spiral groove drive design is adopted, drive is simple, and actions are accurate and reliable; conic rod stretching and expansion actions do notneed reverse drive, high-speed operation can be conducted, and a target is quickly captured; and the structure is compact, the locating accuracy is high, the conic rod stretching expansion mechanismis suitable for a capture mechanism of a tail end executive device, the conic rod stretching expansion mechanism is applied to a high-orbit satellite universal capture device, a target satellite engine throat pipe can be reliably captured multiple times, and the conic rod stretching expansion mechanism also can serve as a locking mechanism used after accurate alignment conducted by a space dockingmechanism accurate alignment device.

Description

technical field [0001] The invention belongs to the technical field of on-orbit service and maintenance of spacecraft, and relates to a telescopic expansion and tightening mechanism. Background technique [0002] Geostationary Orbit (GEO) is an important earth orbit resource for human beings, and the on-orbit resources are limited by the orbital position and are extremely scarce. However, with the rapid development of space missions, the total number of satellites in the GEO belt (GEO±200km) contains more than 40% of uncontrollable or abandoned satellites and their wreckage. Security poses a threat, and it also leads to a serious waste of GEO orbital resources. Another statistics show that among the GEO satellites that have failed in orbit, more than 50% of the failures are due to the loss of a certain function of the service system, while the payload and platform main functions that account for more than 70% of the satellite cost are intact. Therefore, there is an urgent ...

AI Technical Summary

Problems solved by technology

A weak-impact universal capture mechanism and its pawl expansion device (ZL 201410783968.6 and ZL201410785009.8) designed for high-orbit satellites by the early research group of the capture and docking mechanism for satellites in orbit. Motor drive, based on the pawl expansion device, the main core drive components are arranged axially, the overall structural size is too large, and the motor needs to move forward and reverse during the stretching and expansion process, which limits the capture speed

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