Variable geometry truss driven rod for octahedral truss unit
A variable geometry and octahedral technology, applied in the field of variable geometry truss passive rods of octahedral truss units, can solve the problems of inconvenient installation and precise positioning of fixed lengths
Active Publication Date: 2013-08-07
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
[0012] These designs and studies have shown that the variable geometry truss passive rod of the octahedral truss unit has the disadvantages of fixed length, inconvenient installation and precise positioning. Therefore, those skilled in the art are committed to developing a new type of variable geometry truss passive rod
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[0027] The technical solution of the preferred embodiment of the present invention will be further described below in conjunction with the accompanying drawings.
[0028] figure 1 It is an exploded plan view of the passive rod of the octahedral element variable geometry truss in the preferred embodiment of the present invention, figure 2 It is an exploded three-dimensional view of the passive rod of the octahedral unit variable geometry truss in the preferred embodiment of the present invention. Such as figure 1 with figure 2 As shown, the passive rod of the octahedral unit variable geometry truss includes a ball bearing 1, a connecting screw 2, an adjustable nut sleeve 3, a connecting screw 4, a stiffening collar 5, and a composite tube 6. Among them, the ball bearing 1 is in the shape of a drum with a central shaft hole. The connecting screw 2 has a boss in the middle. One end is connected to the cylinder with fine thread, and the other end is connected to the cylinder with a ...
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The invention provides a variable geometry truss driven rod for an octahedral truss unit. A rod body is provided with a composite pipe (6), two ends of the rod body are provided with ball bearings (1), the ball bearings (1) are drum-shaped and are provided with central shaft holes, a boss is arranged in the middle of a connecting screw (2), one end of the connecting screw (2) is connected with a cylinder with fine threads, the other end of the connecting screw (2) is connected with a cylinder with a slightly smaller front end section, a small section is mounted into the central shaft holes of the ball bearings (1) in an interference manner, internal threads of an adjustable nut sleeve (3) are symmetric, one end of the adjustable nut sleeve is provided with a right-handed forward screw, the other end of the adjustable nut sleeve is provided with a left-handed reverse screw, a boss is arranged in a connecting screw (4), a thinner end of the connecting screw (4) is connected with a cylinder with fine threads, a thicker end of the connecting screw (4) is provided with a sleeve pipe, a middle body of the driven rod is provided with the composite pipe (6), two ends of the middle body of the driven rod are sleeved into the sleeve pipe of the connecting screw (4) and an outer sleeve stiffening sleeve ring (5), and the composite pipe (6) is bonded with the sleeve pipe of the connecting screw (4) and the outer sleeve stiffening sleeve ring (5) by the aid of adhesives. Two ends of the driven rod are symmetric, and the connecting screw (2) and the connecting screw (4) are provided with the fine threads and are reverse.
Description
Technical field [0001] The invention relates to a variable geometry truss passive rod in the technical field of structural mechanism engineering, in particular to an octahedral truss unit variable geometry truss passive rod. Background technique [0002] The octahedral truss element is composed of 12 rods and 6 nodes to form a space-accurate system. There is neither statically indeterminate nor internal mechanism. Therefore, the octahedral truss element is an effective basis for constructing large complex structural systems, spatial extension mechanisms, and control mechanisms. Truss element. When the octahedral truss element has the same edge length, it is called a regular octahedral truss element. The six side edges of the octahedral truss unit are set as active rods. This is the well-known Stewart platform. The active rods can be greatly expanded or contracted with quick response, and are used for tracking mechanisms and vibration reduction and isolation mechanisms. The top ...
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IPC IPC(8): F16B7/18
Inventor 陈务军张大旭胡士强顿向明
Owner SHANGHAI JIAO TONG UNIV