High-precision spherical hinge structure for parallel machine tools

Abstract

A high-precision spherical hinge structure for parallel machine tools comprises a lock nut, a washer, a spherical joint lower fork bearing block, a cylindrical pin, a cross, a pin roll, a spherical hinge upper fork, a large washer, a screw, a needle roller bearing, a spherical hinge lower fork and the like, wherein the spherical hinge upper fork rotates around the pin roll positioned in the cross, the spherical hinge lower fork rotates around the cylindrical pin transversely inserted into the pin roller, and the spherical hinge lower fork is fitted to the spherical hinge lower fork bearing block through the lock nut and two pairs of bearings. The high-precision spherical hinge structure is simply a three-degree-of-freedom hinge structure capable of substituting a spherical hinge. Compared with the traditional spherical hinges, the high-precision spherical hinge structure has the advantages that the independent rotational angle range is wide, tensile strength is high, mounting and regulation are convenient, machining precision is easy to guarantee and the like. The high-precision spherical hinge structure is mainly applied to parallel machine tools to replace spherical hinges.

Description

technical field [0001] The invention relates to a new type of ball joint structure for parallel machine tools, more specifically to an improved high-precision ball joint structure for parallel machine tools which uses a Hooke hinge plus a rotating pair to replace ordinary ball joints. Background technique [0002] Parallel machine tool has the characteristics of high rigidity, high precision, high load capacity, high dynamic performance, high speed, symmetrical and compact structure, etc. It can be widely used in flight simulators, assembly operations, machining, medical rehabilitation and other fields, and has become an international One of the areas of research that has received much attention. However, due to factors such as hinge constraints, rod length constraints, branch chain interference, and singular configurations, its effective working space is greatly limited, and the movable platform has little room for movement, and it is not as flexible as the hand of a serial...

AI Technical Summary

Problems solved by technology

[0003] Therefore, it has become an important issue to seek a new type of spherical joint to overcome the shortcomings of traditional spherical joints, which require high machining accuracy and are not easy to install.

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