A rope-driven passive tensioning device with an expandable mechanism

Abstract

The invention discloses a cable-driven passive tensioning device of a deployable mechanism. The cable-driven passive tensioning device comprises a base, an upright, a swing arm, a swing arm seat, a swing arm shaft, a tensioning torsion spring, wire wheel mounting seats, wire wheels and an angle sensor. The upright is mounted in the middle of the base, the swing arm is coupled to the base, swinging of the swing arm is controlled through the tensioning torsion spring, and the swing arm is located on one side of the upright; the rotational angle of the swing arm is measured through the angle sensor; one wire wheel mounting seat is mounted at each of the top end of the upright, the middle of the lower surface of the base and the free end of the swing arm; the two wire wheels are coupled to each wire wheel mounting seat, and a threading passage is formed between every two corresponding wire wheels. The base is fixed to the fixed end of the deployable mechanism, and a driving cable of the deployable mechanism is connected with the movable end of the deployable mechanism by sequentially passing the base, the swing arm and the threading passage between the wire wheels on the wire wheel mounting seats on a top rod.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a tensioning device, specifically, a tensioning device driven by a rope of an expandable mechanism and a method for measuring the tension force of the rope. Background technique [0002] With the development of the aerospace industry, more and more aerospace projects will use some large in-orbit structures. However, due to the limitation of the volume of the launch vehicle, the size of the non-foldable structure cannot meet the mission requirements, so various space-space folding mechanisms have been rapidly developed and applied. Aerospace applications require the device to be light in weight, strong in driving ability, and able to work normally in vacuum, high and low temperature environments. Therefore, rope drives are widely used in aerospace deployable mechanisms. [0003] The driving rope in the rope driving device requires that there is always a certain tension during the...

AI Technical Summary

Problems solved by technology

[0003] The driving rope in the rope driving device requires that there is always a certain tension during the working process to prevent the driving rope from slipping out of the winding guide device, and the driving rope may be entangled with other parts or self-winding after the driving rope is loose, making the rope drive Device failure, thereby affecting the function of the mechanism

At present, the tensioning of most rope drives adopts the way that the power source part always applies active force to the drive rope to realize the tension of the drive rope, but vibration may occur during the unfolding and retracting process of the unfolding mechanism, so that the tension of the active force The way fails at some point, and the rope drive device may experience drive failure

And in some retractable mechanisms, it is necessary to control the tension on the drive rope to ensure the tension on the drive rope of the retractable mechanism under certain configuration conditions, thereby controlling the function of the retractable mechanism implementation, which increases the complexity of the operation

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