Hydraulic clutch device

A hydraulic clutch device, comprising:

• a clutch actuation mechanism having a clutch outer;
• a clutch inner coaxially surrounded by the clutch outer;
• a plurality of first friction plates engagable with the clutch outer in a relatively non-rotatable manner;
• a plurality of second friction plates arranged to alternately overlap with the first friction plates and engagable with the clutch inner in a relatively non-rotatable manner;
• a bearing plate portion fixed to one of the clutch inner and the clutch outer to be opposed to the first and second friction plates arranged in a mutually overlapping manner and a pressing plate portion that sandwiches the first and second friction plates with the bearing plate portion;
• a clutch disengage/engage control mechanism for switching disengagement/engagement of the clutch actuation mechanism;
• and
• a clutch piston operatively forming a part of the clutch disengage/engage control mechanism, said clutch piston having opposite sides facing toward a control hydraulic chamber and a hydraulic canceler chamber and which is connected to the pressing plate portion so as to move to a side for pressing the first and second friction plates in accordance with an increase in hydraulic pressure of the control hydraulic chamber and a division wall member forming the hydraulic canceler chamber between the division wall member and the clutch piston and forming an oil passage, for introducing lubricating oil toward the first and second friction plates, in cooperation with the clutch inner;
• said control hydraulic chamber, the hydraulic canceler chamber and the division wall member of the clutch disengage/engage control mechanism being arranged within a range corresponding to a space between outer surfaces of the bearing plate portion and the pressing plate portion and radially inward of the clutch actuation mechanism,
• wherein a lubricating-oil supply hole that opens into the hydraulic canceler chamber at a position radially inward with respect to an inner peripheral edge of the division wall member is provided in the clutch inner, and a branch wall at least a part of which is opposed to an opening of the lubricating-oil supply hole integrally projects from an inner periphery of the division wall member so as to introduce lubricating oil from the lubricating-oil supply hole toward the oil passage.

A hydraulic clutch device comprising:

• a clutch actuation mechanism having a clutch outer;
• a clutch inner coaxially surrounded by the clutch outer;
• a plurality of first friction plates engagable with the clutch outer in a relatively non-rotatable manner;
• a plurality of second friction plates arranged to alternately overlap with the first friction plates and engagable with the clutch inner in a relatively non-rotatable manner;
• a bearing plate portion fixed to one of the clutch inner and the clutch outer to be opposed to the first and second friction plates arranged in a mutually overlapping manner and a pressing plate portion that sandwiches the first and second friction plates with the bearing plate portion;
• a clutch disengage/engage control mechanism for switching disengagement/engagement of the clutch actuation mechanism;
• and
• a clutch piston operatively forming a part of the clutch disengage/engage control mechanism, said clutch piston having opposite sides facing toward a control hydraulic chamber and a hydraulic canceler chamber and which is connected to the pressing plate portion so as to move to a side for pressing the first and second friction plates in accordance with an increase in hydraulic pressure of the control hydraulic chamber, and a division wall member disposed between the clutch piston and the bearing plate portion forming the hydraulic canceler chamber between one side of the division wall member and the clutch piston and forming an oil passage between an opposite side of the division wall member and the bearing plate portion, for introducing lubricating oil toward the first and second friction plates, in cooperation with the clutch inner;
• said control hydraulic chamber, the hydraulic canceler chamber and the division wall member of the clutch disengage/engage control mechanism being arranged within a range corresponding to a space between outer surfaces of the bearing plate portion and the pressing plate portion and radially inward of the clutch actuation mechanism.