Parallel workbench for realizing space three-translation high-frequency excitation

Abstract

The invention discloses a parallel workbench for realizing space three-translation high-frequency excitation in which a flexible kinematic pair is combined with a parallel mechanism, wherein a static platform is composed of three panels orthogonal with each other; a single-dimensional exciter is vertically and fixedly arranged on each panel; three parallel branch chains are connected between a movable platform and the single-dimensional exciters; the tail ends of three branch chains in orthogonal distribution are connected to the corresponding single-dimensional exciters through movable pairs, respectively; and the top ends of the three branch chains in orthogonal distribution are all vertically connected to the movable platform through rotating pairs; the single branch chain is formed by orderly connecting the movable pair 3A, 4R structure 3B, the rotating pair 3c and the rotating pair 3D in series according to the vertical and parallel position relations of the axes of the movable pairs; and the movable pair is a continuous integrated body and is provided with a surface contact compression-resisting structure and a surface contact tensile structure. The parallel workbench is good in stress performance, compact in structure and relatively high in structural rigidity.

Description

technical field [0001] The invention relates to a workbench combining a flexible kinematic pair and a parallel mechanism, which can realize three-translation high-frequency excitation in space. Background technique [0002] With the development of modern mechanical engineering towards high speed, high precision and high performance, it is more and more important to test the vibration reliability performance of equipment, especially the test of 400Hz high frequency vibration reliability performance. Performing this type of testing requires a high frequency excitation table to simulate real high frequency vibrations. [0003] There are mainly the following types of exciters currently available: [0004] 1. The publication number is CN101854153A, and the name is "Piezoelectric High Frequency Vibration Table". It is a single-dimensional high-frequency vibration table that can produce a single-dimensional vibration output of 2kHZ-50kHZ, but its defect is that it cannot simulate ...

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Problems solved by technology

[0004] 1. The publication number is CN101854153A, and the name is " "Piezoelectric high-frequency vibration table" is a single-dimensional high-frequency vibration table that can produce a single-dimensional vibration output of 2kHZ-50kHZ, but its defect is that it cannot simulate the multi-degree-of-freedom high-frequency vibration output in the actual situation

[0005] 2. The publication number is CN87210629 and the name is " "Hydraulic asynchronous bumping vibration table", which can perform vertical movement and withstand horizontal movement, but its vibration form is composed of several single-degree-of-freedom exciters superimposed ， It cannot simulate the multi-dimensional real vibration in the actual environment, and the working accuracy and frequency are low

[0006] 3. The publication number is CN101038208 and the name is " A six-axis micro-vibrator system ”， Using flexible joints to achieve high-frequency multi-dimensional compound motion, but it produces small deformations, which can only achieve high-frequency micro-excitation output with six degrees of freedom in space, but cannot achieve high-frequency motion output at a macroscopic scale

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