초록 ▼

A hydraulic press includes a press plate mounted for executing working strokes and return strokes; a hydraulic countersupport braking cylinder supported at an end zone of the working stroke for engaging the press plate at an end portion of the working stroke to cause deceleration of the press plate

A hydraulic press includes a press plate mounted for executing working strokes and return strokes; a hydraulic countersupport braking cylinder supported at an end zone of the working stroke for engaging the press plate at an end portion of the working stroke to cause deceleration of the press plate by the hydraulic countersupport braking cylinder; and a hydraulic shock absorber connected between the press plate and the hydraulic countersupport braking cylinder. The hydraulic shock absorber is arranged for compression from an expanded state by the press plate in an end zone of the working strokes. The hydraulic shock absorber has a shock absorber chamber containing hydraulic fluid; a throttle for setting a braking force in the shock absorber chamber to a magnitude smaller than the braking force of the hydraulic countersupport braking cylinder; and a resetting arrangement for returning the shock absorber into its expanded state.

대표청구항 ▼

In a hydraulic press including a press plate mounted for executing working strokes and return strokes; hydraulic power means connected to said press plate for driving said press plate in execution of said working strokes; a hydraulic countersupport braking cylinder means supported at an end zone of

In a hydraulic press including a press plate mounted for executing working strokes and return strokes; hydraulic power means connected to said press plate for driving said press plate in execution of said working strokes; a hydraulic countersupport braking cylinder means supported at an end zone of the working stroke for operatively engaging said press plate at an end portion of the working stroke to cause deceleration of the press plate by said hydraulic countersupport braking cylinder means; the improvement comprising a hydraulic shock absorber having an expanded state and a compressed state; said hydraulic shock absorber being interposed between said press plate and said hydraulic countersupport braking cylinder means, whereby said hydraulic shock absorber is moved from the expanded state into the compressed state by said press plate in an end zone of said working strokes; said hydraulic shock absorber having (a) means defining a shock absorber chamber containing hydraulic fluid; (b) throttle means for setting a braking force in said shock absorber chamber to a magnitude smaller than a braking force of said hydraulic countersupport braking cylinder means; and (c) resetting means for returning said shock absorber into said expanded state.