Swing clamp

Details Swing clamp Swing clamp

1983-01-07

1985-04-02

Schmidt, Frederick R.

Work holders

With fluid means

With safety means

269 27, 269 32, 269 91, 92 33, B23Q 308

Patent

active

045083274

ABSTRACT:
A hydraulically actuatable swing clamp, particularly for the clamping of objects on the table of a machine tool, includes a housing with a piston arranged therein, the latter having a piston rod extending in sealed manner out of the housing. The piston rod carries a clamping arm which in addition to a pure axial clamping motion, performs a swinging motion, effected by a guide device. The guide device includes a normally non-rotatable control bolt arranged on the housing extending into the piston, and at least one cam groove developed in a guide surface between the control bolt and the piston. The cam groove has a helical groove section for the swinging and simultaneous lifting motion, and an axial section for the pure axially directed clamping motion of the clamping arm. A guide member, preferably a ball, arranged on the piston or control bolt, extends into the cam groove. In order to avoid interference with the movement of the object, the clamping arm is swingable from an intermediate position located above the clamping plane rotated at a predetermined angle from the clamping position, into a position of rest which lies below the clamping plane rotated relative to the clamping position by an angle that is twice the angle of rotation of the intermediate position from the clamping position.

REFERENCES:
patent: 3541925 (1970-11-01), Guinot
patent: 3572216 (1971-03-01), Seesody
patent: 3648568 (1972-03-01), Wright
patent: 3948502 (1976-04-01), Waller et al.
patent: 4140045 (1979-02-01), Hardwick et al.
patent: 4351516 (1982-09-01), Ersoy et al.
patent: 4413549 (1983-11-01), Knable
patent: 4417236 (1983-11-01), Hung

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