Guy cable rod type one-dimensional stretching arm

Abstract

The invention discloses a guy cable rod type one-dimensional stretching arm, which mainly has the following three forms: a thin-wall tubular stretching arm, a disc pressure lever type stretching arm and a hinge bar type stretching arm. The guy cable rod type one-dimensional stretching arm consists of a set of stretching mechanism; the stretching mechanism consists of four hollow support rods (4) and two rigid frameworks (5); an expanding guy cable (10) is connected with a turnover conical sleeve (23) fixed at the corner of the rigid framework (5) through the hollowness of the support rods (4); an expanding roller (15) is connected with an expanding motor (16); a furling guy cable (6) passes through diagonal pores of the rigid framework (5) respectively, and one end of the furling guy cable is fixed on a stretching arm seat, while the other end is fixed on a furling roller (1); two anti-rotating rods (13) are fixed on the rigid framework at the topmost layer; a linear bearing (12) is arranged at the corresponding position on every one layer of rigid framework; and the expanding motor (16) and a furling motor (3) are torque motors. The guy cable rod type one-dimensional stretching arm is a spatial rod-shaped stretching arm in the field of spaceflight.

Description

Technical field: [0001] The invention relates to a cable-type rod-shaped deployment mechanism, in particular to a one-dimensional extension arm. Background technique: [0002] Due to the limitation of the envelope size of the payload in the vehicle, the large space structure must be folded in a limited space and stretched into the expected configuration after entering orbit. The rod-shaped space extension arm is the most widely used space deployment mechanism. There are three main forms of space rod-shaped extension arms currently used in the aerospace field: thin-walled tubular extension arms, disc-press rod type extension arms, and articulated rod-type extension arms. [0003] Heel warping of the thin-walled tubular extension boom limits structural strength, resulting in low thermal stability, bending and torsional stiffness, and difficult precise positioning. [0004] The rigidity of the extension arm is relatively poor during the expansion process of the disc-type exten...

AI Technical Summary

Problems solved by technology

[0003] Thin-walled tubular extension arm heel warping limits structural strength, resulting in low thermal stability, bending and torsional rigidity, making accurate positioning difficult

[0004] The rigidity of the extension arm is relatively poor during the expansion process of the disc-type extension arm, and the top of the extension arm rotates around the center line of the extension arm. The extension arm can only be extended once in space, and cannot be automatically folded.

[0005] The articulated rod type extension arm requires a complex extension and retraction mechanism, with a large mass

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