Patent ID: 8640843
Filing Date: 2014-02-04
Classification: F16D

Abstract:
1. A hydraulic clutch device comprising: a clutch outer; a clutch inner coaxially surrounded by the clutch outer and rotatably movable therein when the clutch device is disengaged; a plurality of friction plates; a clutch piston that sandwiches the friction plates together with either one of the clutch inner or the clutch outer and moves to the side to pressurize the friction plates in accordance with an increase in a hydraulic pressure in a control hydraulic chamber; a clutch piston guide provided separate from, and disposed inside of the clutch outer in fixed relation to the clutch inner for concurrent rotation therewith, the clutch piston guide configured so that the control hydraulic chamber is formed between the clutch piston guide and the clutch piston; and a canceller plate that forms a hydraulic canceller chamber on the side opposite to the control hydraulic chamber across the clutch piston, wherein: the canceller plate has a projection portion disposed on an inner peripheral end thereof and the clutch piston guide has a notch portion disposed at the end thereof, the projection portion and the notch portion being engaged with each other and assembled, a base circle of the projection portion is larger than an outer diameter of a portion where the clutch piston guide is engaged with the canceller plate, a gap, through which operating oil can pass to the canceller chamber, is formed between the canceller plate and the clutch piston guide, and a locking tool is disposed and engaged in an inner peripheral groove disposed radially inside of the projection portion and regulates axial movement of the canceller plate with respect to the clutch piston guide.