Clutch device

A clutch device for transmitting rotary drive force of a drive shaft to a driven shaft or blocking transmission, comprising:

• a center clutch holding a clutch plate arranged facing a friction plate to be rotatably driven by rotary drive of the drive shaft, coupled to the driven shaft, and rotatably driven together with the driven shaft;
• and
• a pressure clutch arranged facing the center clutch in a state in which the pressure clutch is able to approach or separate from the center clutch and is rotatable relative to the center clutch and elastically pressing the friction plate or the clutch plate;
• a cam portion provided at each of the center clutch and the pressure clutch and having a pair of cam surfaces for causing the pressure clutch to approach or separate from the center clutch to increase or decrease pressing force of the pressure clutch on the friction plate or the clutch plate upon relative rotation of the center clutch and the pressure clutch;
• and
• a lifter plate formed integrally with the pressure clutch and configured to transmit, to the pressure clutch, force of causing the pressure clutch to approach or separate from the center clutch, wherein
• the center clutch has each of a pressure clutch slide portion formed in a cylindrical shape on a cam surface formation side in an axial direction of the driven shaft and configured to slide the pressure clutch along the axial direction and a lifter plate slide portion formed in a cylindrical shape on a side opposite to a pressure clutch slide portion formation side in the axial direction and configured to slide the lifter plate along the axial direction,
• the lifter plate has a first center clutch slide portion configured to slide on the lifter plate slide portion,
• the pressure clutch has a second center clutch slide portion configured to slide on the pressure clutch slide portion, and
• a clearance between the second center clutch slide portion and the pressure clutch slide portion is set to a greater value than a clearance between the first center clutch slide portion and the lifter plate slide portion.