Frame type expandable antenna six-rod joint hinge device

Abstract

The frame-type expandable antenna six-rod joint hinge device is characterized in that it includes a connecting faceplate, a web rod joint and a web rod. The lower layer is connected to the folding rod, the upper layer is connected to the web rod, and the upper layer of the connection face plate is composed of 3 grooves equally divided by 120 degrees. The 3 web rods are installed in each groove through 3 web rod joints; The lower layer of the connection faceplate is connected with 6 folding rods, and there are 6 grooves at the connection, each groove is equally divided by 60 degrees. The web joint is composed of the head of the joint sleeve and the spherical bearing. The material of the joint sleeve is aluminum alloy, and the tail is connected with the web by bonding. The material of the web is carbon fiber. The invention has simple structure, high reliability and light weight.

Description

technical field The invention relates to a joint hinge device of a six-rod joint, which is a key part of a space-borne frame-type deployable antenna, and belongs to the field of satellite antenna structures. Background technique The six-rod joint of the frame antenna is the core component of the frame antenna, and its hinged form determines whether the frame antenna can be deployed smoothly. The frame antenna is composed of basic tetrahedron units. The principle of folding and unfolding is shown in Figure 1, and its structure is shown in Figure 2. The frame antenna includes several six-rod joints, and each joint is equivalent to each of the tetrahedron units. The six-bar joint is hinged together by three web bars, and the hinged form is related to the deployment stiffness of the frame antenna and whether it can be deployed smoothly. The current research status at home and abroad shows that the frame antenna has a history of going to the sky. The six-rod joint hinge form of...

AI Technical Summary

Problems solved by technology

The current research status at home and abroad shows that the frame antenna has a history of going to the sky. The six-rod joint hinge form of the frame antenna developed in Russia is shown in Figures 3 and 4. Its connecting faceplate 1' is a layer, and the middle is a concave layer structure 2' , used to connect 3 web joints 3' and web 4', and the external hexagonal groove 5' connects 6 folding bars. From the perspective of engineering application, this hinged form has the following disadvantages: (1) web joints and The connection form of the web rod is a rolling riveting connection, which has high requirements for the operator, and the force of the rolling riveting is difficult to grasp. If the rolling riveting is too tight, it will affect the rotation of the web rod, and even cause the antenna to fail to unfold. If the rolling riveting is too loose, the web rod connection The gap becomes larger, which affects the profile and overall rigidity of the antenna; (2) the web joint is an aluminum joint, the design form is relatively complicated, and the middle part is relatively weak, which is prone to stress concentration; (3) the hinge mode is two The synthetic motion of direction rotation, one is the rotary motion of the web rod around its own axis, and the other is the rotary motion of the web rod joint around the connection axis inside the connecting faceplate. The rolling riveting connection of the joint and the joint is not easy to ensure the rotation of the web rod; (4) After the antenna is deployed in place, the position of the face plate is completely constrained, and it is difficult to ensure the installation accuracy of the face plate due to the errors caused by processing and manufacturing.

In addition, its web rod is a stainless steel tube with a wall thickness of 0.5mm, which is not easy to meet the weight index of the spaceborne antenna

Images