Hydraulic clutch

A hydraulic pressure clutch comprising:

• a first connecting hub disposed on an input shaft;
• an inner sleeve connected to an outer portion of the first connecting hub;
• a boss connected to an outer portion of the inner sleeve;
• an outer sleeve connected to an outer portion of the boss;
• a clutch drum comprising an inner protrusion connected to an outer portion of the outer sleeve and forming a clutch mounting space and an outer protrusion forming the other clutch mounting space;
• a second connecting hub connected to an outer portion of the outer sleeve;
• a first piston forming first piston chamber together with the second connecting hub therebetween and being operated by hydraulic pressure input to the first piston chamber;
• a plurality of first clutch plates disposed on the outer protrusion and selectively pushed by the first piston along an axial direction;
• a plurality of first friction disks disposed on the first clutch hub alternately with the first clutch plates;
• a first balance wall connected to the inner protrusion and forming a first balance chamber together with the first piston therebetween;
• a second piston forming the second piston chamber together with the boss therebetween, and being operated by hydraulic pressure input to the second piston chamber;
• a plurality of second clutch plates disposed on the inner protrusion and selectively pushed by the second piston along the axial direction;
• a plurality of second friction disks disposed on the second clutch hub alternately with the second clutch plates;
• and
• a second balance wall forming a second balance chamber together with the second piston therebetween,
• wherein
• the first piston penetrates through the outer protrusion for pushing the first clutch plates.