Hydraulically actuated assembly device

Details Hydraulically actuated assembly device Hydraulically actuated assembly device

1987-03-03

1989-02-21

Schmidt, Frederick R.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

269 20, B23P 1904

Patent

active

048052817

ABSTRACT:
A hydraulically actuated device for moving machine parts or the like, especially a device for pressing or fitting bearings into place in the forks of universal joints, consisting of a linear-action work cylinder, a pressure generator with a constant pressure, a supply tank with pressure medium, a main valve which controls the flow of pressure medium to provide the required amount in the work chamber of the work cylinder, a main line connecting these parts of the device, and a measurement system, which controls the main valve as a function of a measurement value, especially the center offset of the joint fork with respect to a reference axis or the like, characterized in that, between the work chamber of the work cylinder and the supply tank, a return line is provided, which has a throttle device which sharply reduces the return flow of pressure medium by comparison to the flow of medium into the work chamber.

REFERENCES:
patent: 4504048 (1985-03-01), Shiba et al.
patent: 4558502 (1985-12-01), Grossmann et al.
patent: 4621402 (1986-11-01), Gossmann et al.

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