Telescopic elastic rotary locating live center device

Abstract

The invention relates to a telescopic elastic rotary locating live center device which is characterized in that the telescopic elastic rotary locating live center device comprises a live center seat; a guide hole is formed in the live center seat; a swelling sleeve center mechanism is arranged in the guide hole; an elastic locking device is arranged on one side of the live center seat, and comprises a center locking nut slidingly arranged in a fixing groove; a center shaft of the center locking nut is connected with a tensioning shaft; the tensioning shaft is hinged with an eccentric shaft; the center shaft of the center locking nut is sleeved with a locking block; a locking check ring is arranged between the locking block and the center shaft of the center locking nut; the locking block is arranged in a locking groove in the outer side of the live center seat; an elastic edge is formed on one side of the locking groove; the locking block can push the elastic edge; a third spring is arranged on the center shaft of the center locking nut; and the two ends of the third spring are in contact with the locking block and the center locking nut. The telescopic elastic rotary locating live center device is high in repeated locating accuracy, low in use cost, reliable in operation and long in service life, and is low in random jamming during operation.

Description

technical field [0001] The invention relates to a movable top device for telescopic elastic rotary positioning, which belongs to the technical field of precision measuring machinery. Background technique [0002] The top is a device for fixing shaft parts. It is generally used in pairs, one is a fixed top and the other is a movable top. In the field of precision measurement, it is required that the tip should be stable during the rotation process, with high precision requirements, small random runout, and good position consistency every time the clamping is repeated. [0003] At present, the active top used for precision measurement is usually used: the active top is installed on the cylindrical guide rod, and the cylindrical guide rod moves up and down in a small range each time to realize repeated clamping of the same kind of parts; for different workpieces, it is required to move the active top in a large range. The guide rail groove is adopted, and the movable center mo...

AI Technical Summary

Problems solved by technology

This is a fatal shortcoming for high-precision measurement

[0005] When the movable top is required to move in a large range, since the movable top needs to move in the chute as a whole, there are also 5-8 microns between the chute and the guide block. This 5-8 micron gap will also make the movable top have a large range Uncertain location after moving

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