A multi-degree-of-freedom motion branch chain resolution test platform and test method

Abstract

The invention discloses a multi-degree-of-freedom motion branch chain resolution test platform and a test method, which belong to the field of mechanical technology and can directly measure the radial runout error of a bearing located in a motion branch chain and the resolution of a multi-degree-of-freedom motion platform motion branch chain Rate. Including: a laser displacement meter; a fixing device; a straight beam type flexible hinge connected with the fixing device; a moving platform fixedly connected with the straight beam type flexible hinge; and a linear drive assembly arranged between the fixing device and the moving platform. The upper end is connected to the lower end surface of the moving platform through a flexible ball hinge, and the lower end is connected to the fixing device through a Hooke hinge; the laser displacement gauge is placed above the moving platform; the fixing device has five fixed points, symmetrically distributed; the straight The beam-type flexible hinge and the moving platform are integrally formed, and the straight beam-type flexible hinge is connected to the fixing device through a ball screw and a spring; the Hooke hinge is connected to the fixing device and the moving platform through screws respectively.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a multi-degree-of-freedom motion branch chain resolution test platform and a test method. Background technique [0002] The multi-degree-of-freedom motion branch chain is the main component of a variety of parallel motion mechanisms including the 6-degree-of-freedom motion platform. Nowadays, with the increasing application of multi-degree-of-freedom parallel motion mechanisms in the fields of vehicles, medical care, and aviation, it is important for motion The precision requirements of the platform are also getting higher and higher. Due to the relatively high displacement output accuracy of the current high-precision motor, the error of the multi-degree-of-freedom parallel kinematic mechanism mainly comes from the multi-degree-of-freedom shafting design of the Hooke hinge at the connection between the motion branch chain and the table top. However, due to the spe...

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Problems solved by technology

However, due to the special structural limitations of the Hooke hinge, the traditional shafting error measurement method is not used for the motion accuracy test of the Hooke hinge. Therefore, there is currently no relevant special research on the kinematic branch chain of the multi-degree-of-freedom mechanism and the motion accuracy of the Hooke hinge in China. , considering that the accuracy of the multi-degree-of-freedom kinematic mechanism mainly depends on the kinematic accuracy of each kinematic branch chain, so in the design and research process of the multi-degree-of-freedom kinematic mechanism, it is necessary to conduct a systematic study on its kinematic branch chain

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