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A technology of tetrahedron and degrees of freedom, applied in the field of expandable cells, can solve the problems of low motion accuracy, many rods, and many motion pairs, and achieve the effect of high mechanism precision, few motion pairs, and simple structure.
Active Publication Date: 2021-02-05
BEIHANG UNIV
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[0005] The purpose of the present invention is to provide a single-degree-of-freedom tetrahedron expandable cell mechanism to overcome the problems of the prior art that the tetrahedron expandable unit has many kinematic pairs, ball pairs, many rods, and low kinematic precision.
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[0021] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.
[0022] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. ...
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Abstract
The invention relates to the technical field of extensible cells, and particularly discloses a single-degree-of-freedom tetrahedral extensible cell mechanism. The mechanism comprises a first connecting rod, a first rotating pair, a second connecting rod, a second rotating pair, a third connecting rod, a fourth rotating pair, a fourth connecting rod, a third rotating pair, a ninth rotating pair, aneighth connecting rod, a tenth rotating pair, a ninth connecting rod, an eleventh rotating pair, a seventh rotating pair, a seventh connecting rod, a sixth connecting rod, an eighth rotating pair, asixth rotating pair, a fifth connecting rod and a fifth rotating pair. The mechanism comprises nine connecting rods and eleven rotating pairs, the single-degree-of-freedom tetrahedral extensible cellmechanism has the advantages that the structure is simple, motion pairs are fewer, rotating pairs are completely adopted, and the mechanism precision is higher.
Description
technical field [0001] The invention relates to the technical field of expandable cells, in particular to a single-degree-of-freedom tetrahedral expandable cell mechanism. Background technique [0002] With the continuous development of space technology, the application of large space functional payloads such as space telescopes, space antennas, and space stations has gradually become widespread. In the space installation and use of such equipment, a large-scale space load-bearing structure that meets certain rigidity and precision is required as its base to play the role of fixing and carrying. Due to the large envelope volume of the load-carrying structure when it is working, the carrier rocket cannot directly launch it into the air. Using a large-scale expandable mechanism, there are problems such as relatively complicated mechanism, high assembly precision requirements, and easy jamming during the unfolding process. [0003] Therefore, a solution was created to carry t...
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