A Rotary Joint Based on Shape Memory Alloy Locking and Release
A technology of rotating joints and memory alloys, which is applied in motor vehicles, space navigation equipment, space navigation aircraft, etc., can solve the problems of inability to achieve multi-purpose, lock and release helplessness, incomplete release, etc., and achieve high separation reliability and stability, fast response, and guaranteed stability
Active Publication Date: 2021-04-02
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology
[0005] The defect of the prior art is that: it can only realize the complete release through artificial compression, and then control; or it can only lock the flywheel and other devices and then incompletely release through control
As a result, these SMA locking and releasing devices cannot be used for multiple purposes, especially for the locking and releasing of joints and other positions.
Method used
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Embodiment 1
[0052] This embodiment provides a rotating joint based on shape memory alloy locking and releasing, such as Figure 1-8 As shown, it includes: lower top plate 1, upper top plate 2, release bolt 3, release spring 4, snap cover 5, outer sleeve 6, inner sleeve 7, second pressing block 8, second SMA wire 9, tensioning Spring 10, second pulley 11, support seat 12, housing 13, first pulley 14, first SMA wire 15, first pressure block 16, split nut 17, auxiliary split bolt 18, cover plate 19, nut support 20. First lug 21, separation spring 22, second lug 23, upper through hole 24, accommodation cavity 25, limit ring 26, accommodation groove 27, internal thread 28, annular protrusion 29, annular groove 30. Limiting surface 31, annular slope 32, lower through hole 33, circular hole 34, sub-lobe nut 35, protrusion 36, groove 37, positioning groove 38.
[0053] Wherein, the outer sleeve 6 is arranged on the support seat 1, and a cover plate 19 is arranged above the outer sleeve 6, and th...
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The invention provides a rotary joint based on shape memory alloy locking and releasing. The rotary joint comprises a supporting seat, an outer sleeve, an inner sleeve, a clamping cover, a cover board, top boards and a first SMA wire; the outer sleeve is arranged on the supporting seat, and a tension spring is arranged in the outer sleeve; the inner sleeve is arranged in the outer sleeve in a sliding mode and arranged above the tension spring; the clamping cover is arranged in the outer sleeve and fixedly arranged above the inner sleeve; the clamping cover is provided with at least two clamping rods; the cover board is fixedly arranged above the outer sleeve, clamping grooves are formed in the top boards, the clamping rods penetrate through the cover board, the clamping grooves are arranged corresponding to the clamping rods, and the number of the clamping grooves is not smaller than that of the clamping rods; and one end of the first SMA wire is fixed, and the other end of the first SMA wire is in drive connection with the inner sleeve. By the adoption of the rotary joint, common locking and releasing can be achieved, the joint can be locked and released as well, the rotary jointcan be applied to the positions such as an aerospace deployment mechanism and an aerospace motion joint, and multiple functions are achieved; and the installation size phi does not exceed 37 mm, the size is small, and the mass is small.
Description
technical field [0001] The invention relates to a rotating joint based on shape memory alloy locking and releasing. Background technique [0002] Traditional spacecraft lock and release devices are mainly pyrotechnic devices, which have many advantages such as high reliability, high energy efficiency, and fast action speed; but at the same time, they have disadvantages such as large vibration, large pollution, and non-reusable use. Therefore, finding a non-pyrotechnic compression release device with better comprehensive performance has become one of the important research objects in the field of spacecraft. Through the extensive review of relevant literature at home and abroad, it can be seen that there have been many studies on the design of aerospace locking and releasing devices using SMA as a driving source, and some of the technologies have even been applied to objects such as artificial satellites. In the non-pyrotechnic spacecraft locking and releasing mechanism, SMA...
Claims
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IPC IPC(8): B64G1/64
CPCB64G1/645
Inventor 李兵黄海林樊凌风宁英豪贾广鲁
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL