Crossbeam pre-tensioning module of cantilever type platform

Abstract

The invention provides a crossbeam pre-tensioning module of a cantilever type platform. The crossbeam pre-tensioning module comprises a seat rail member, a crossbeam and a pre-tensioning group, wherein the seat rail member comprises a seat body which has a predetermined length and a rail part which is arranged on the upper seat surface of the seat body along a long shaft of the seat body; the crossbeam comprises a beam body which has a predetermined length, which is glidingly arranged on the rail part via one end of the long shaft and which is capable of linearly sliding to and fro along the long shaft direction of the seat body; and the pre-tensioning group comprises a long suspension body which is parallel to the seat body and correspondingly located at the side of the other end of the long shaft of the beam body, a suction reception part which is made of a magnetic material, located on one side surface of the long shaft of the suspension body and capable of extending along the long shaft of the suspension body, and a magnetic suction part which is located on the other end of the long shaft of the beam body, corresponding to the suction reception part and separated from the suction reception part. The crossbeam pre-tensioning module has the beneficial effects of increasing the rigidity of the machine platforms, shortening the setting time, preventing the crossbeam from hanging down at the same time and keeping stable precision.

Description

technical field [0001] The invention relates to a cantilever platform structure, in particular to a beam pre-tensioning module of the cantilever platform which can increase the rigidity of the machine, shorten the setting time, prevent the beam from drooping and maintain stable precision. Background technique [0002] Please refer to Fig. 1, as far as the existing cantilever platform is concerned, it is mainly to set a linear seat rail 1 on a base, and slide one end of the elongated beam 2 on the seat rail 1 , so that the seat rail 1 provides a linear guiding direction to guide the beam 2 to linearly move forward. [0003] However, due to the weight of the beam 2 itself, the beam 2 usually has a guiding purpose similar to that of the seat rail 1, so as to guide the moving element slidingly arranged on the beam 2, so that its movement Often the setting time is too long due to the inertial swing. Furthermore, when the stroke of the cantilever axis is too long, the crossbeam 2...

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Problems solved by technology

[0003] However, due to the weight of the beam 2 itself, the beam 2 usually has a guiding purpose similar to that of the seat rail 1, so as to guide the moving element slidingly arranged on the beam 2, so that its movement Often the setting time is too long due to the inertial swing. Furthermore, when the stroke of the cantilever axis is too long, the crossbeam 2 is easily suspended due to the lack of support at the other end of the long axis. State, which affects the accuracy of platform movement

[0004] In order to improve the deformation state of these sagging and bending, in the prior art, an auxiliary rail structure similar to the seat rail part 1 is added at the other end of the long axis of the crossbeam 2, so that the crossbeam 2 is long The other end of the shaft is supported, which can effectively avoid the deformation of the beam, but the result of the support at both ends of the beam is excessive restraint, so that when the beam is displaced on the seat rail and the auxiliary rail respectively, There is an error in the synchronous state between them, so that the accuracy of the platform movement is also affected. Obviously, this technique of improving the deformation of the beam through the auxiliary rail is not ideal

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