CLAMPING DEVICE Russian patent published in 2005 - IPC

FIELD: metal working, namely clamping devices such as collet chucks for drilling, milling and other machine tools.

SUBSTANCE: device includes housing connected with spindle of machine tool and having cone opening; collet chuck mounted in said opening and having outer cone surface; bearing assembly for housing of device mounted in bushing secured to machine tool; captive nut screwed on housing of device at side of its cone opening and having outer cylindrical surface designed for embracing nut by hands of operator; disc type member with cams arranged under bushing. In lower end of said bushing there are recesses corresponding to said cams. In order to simplify procedures for claming/unclamping bushing of bearing assembly is in the form of one-piece part stationary mounted in machine tool; disc type member is in the form of cam disc having in its periphery cams directed along radius. Said cam disc is mounted in housing of device with possibility of axial motion and it is spring-loaded by means of helical compression spring embracing device housing at level of lower part of bushing of bearing assembly. Device is provided with nut wrench. In upper part of captive nut there are flats for nut wrench. Lower side of cam disc has convex surface that simplifies arranging of jaws of nut wrench on flats of nut. Spring-loaded stops used for engaging with cam disc are mounted in jaws of nut wrench.

EFFECT: simplified design of clamping device, easy clamping/unclamping operations.

5 cl, 8 dwg