Large load gapless accurate hooke hinge

Abstract

The aim of the invention is to provide a large-load gapless precise hook hinge. The hook hinge overcomes the disadvantages of a traditional two-DOF and three-DOF (degree of freedom) rotary hinge, that is, a hook hinge structure which is used in a six-DOF vibration isolation and positioning platform and adopts an angular contact bearing pretightening mode to remove the bearing clearance and achieve the effects of large bearing capacity and high precision. The hook hinge consists of four parts: an upper rotation body, an upper node fork, a cross axle component and a lower node fork. The upper rotation body and the upper node fork are movably connected together to form a first rotational degree of freedom. The upper node fork and the cross axle are movably connected together to form a second rotational degree of freedom. The cross axle and the lower node fork are movably connected together to form a third rotational degree of freedom. The large-load gapless precise hook hinge has the advantages of a compact structure, strong bearing capacity, high precision, a large rotational range of the hinge, long service time, convenient maintenance, etc. The large-load gapless precise hook hinge is suitable for the connection of other precise mechanisms besides a six-rod parallel positioning platform.

Description

(1) Technical field: [0001] The invention relates to a precision Hooke hinge with large load and no clearance, in particular to a precision Hooke hinge with large load and no clearance used in a six-degree-of-freedom vibration isolation positioning platform, and belongs to the field of precision machinery. (two) background technology: [0002] The six-degree-of-freedom vibration isolation positioning platform is an active vibration isolation and precise positioning device applied to precision optical observation equipment and laser aiming equipment. It includes several parts such as upper platform, lower platform, active telescopic device, two-degree-of-freedom rotary hinge and three-degree-of-freedom rotary hinge. Each active telescopic device is connected with the upper platform through a two-degree-of-freedom rotating hinge, and connected with the lower platform through a three-degree-of-freedom rotating hinge. Through the telescopic movement of six active telescopic dev...

AI Technical Summary

Problems solved by technology

[0003] In the past, two-degree-of-freedom rotary hinges and three-degree-of-freedom rotary hinges used in six-degree-of-freedom vibration isolation positioning platforms usually use ball joints, but ball joints are difficult to process, difficult to assemble, and have large frictional resistance, and it is difficult to eliminate hinges under large loads. gap, which affects the positioning accuracy, vibration isolation effect and bearing capacity of the six-degree-of-freedom vibration isolation positioning platform, so it is urgent to improve

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