Patent ID: 8366077
Filing Date: 2013-02-05
Classification: B66F

Abstract:
1. A jack structure for a clutch comprising: a main hydraulic cylinder to push a movable arm to move vertically; a holder including a support rod axially disposed thereon to be actuated by an auxiliary hydraulic cylinder of the movable arm to move vertically and horizontally relative to the holder, wherein the main hydraulic cylinder is a single acting hydraulic cylinder, wherein the auxiliary cylinder is a double acting hydraulic cylinder, wherein the main hydraulic cylinder is in communication with an inlet tube of the auxiliary hydraulic cylinder; a valve seat including a pump hole to draw hydraulic oil via a valve seat cylinder, an inlet connected with the inlet tube, an outlet coupled with an outlet tube of the auxiliary hydraulic cylinder, and a bore adapted to be connected with an oil tank; a control post axially connected with the valve seat and including a plurality of grooves to selectively communicate with the pump hole, the inlet, the outlet, and the bore after rotation, wherein the main and auxiliary hydraulic cylinders are actuated by hydraulic oil outputted from the valve seat cylinder and the control post to retract simultaneously, wherein the movable arm and the support rod move vertically and respectively.