Clutch device

A clutch device comprising:

• a pair of members disposed at a distance on a common axis and being relatively rotatable to each other on said common axis;
• a cam mechanism disposed between said pair of members, said cam mechanism comprising a pair of cam elements, each having a cam surface axially opposed to each other, and a cam roller disposed between said opposed cam surfaces;
• a pushing means for selectively pushing said cam mechanism as a whole onto the axially opposed surface of one of the relatively rotating members to convert a circumferential force to an axial thrust via said cam mechanism so that said relatively rotating members are integrally engaged with each other by said thrust;
• and
• a limiter means for limiting said relative rotational movement of said cam elements when said relative rotation occurs between said members in the direction reverse to that wherein said axial thrust is generated between the pair of members, wherein said limiter means comprises a projection axially projected from one of said opposed surfaces of said cam elements and a recess provided on the other of said opposed surfaces of said cam elements, and wherein said projection is provided on the cam surface of said cam element closer to the piston and said recess is provided on the cam surface of the other cam element.

A clutch device comprising:

• a pair of members disposed at a distance on a common axis and being relatively rotatable to each other on said common axis;
• a cam mechanism disposed between said pair of members, said cam mechanism comprising a pair of cam elements, each having a cam surface axially opposed to each other, and a cam roller disposed between said opposed cam surfaces;
• a pushing means for selectively pushing said cam mechanism as a whole onto the axially opposed surface of one of the relatively rotating members to convert a circumferential force to an axial thrust via said cam mechanism so that said relatively rotating members are integrally engaged with each other by said thrust;
• and
• a limiter means for limiting said relative rotational movement of said cam elements when said relative rotation occurs between said members in the direction reverse to that wherein said axial thrust is generated between the pair of members, wherein the limiter means is a roller stopper for limiting the relative rotational movement of said pair of cam elements by restricting the movement of said cam roller, and wherein said roller stopper is of a type acting on a pair of end shafts of said cam roller.

A clutch device comprising:

• a pair of members disposed at a distance on a common axis and being relatively rotatable to each other on said common axis;
• a cam mechanism disposed between said pair of members, said cam mechanism comprising a pair of cam elements, each having a cam surface axially opposed to each other, and a cam roller disposed between said opposed cam surfaces;
• a pushing means for selectively pushing said cam mechanism as a whole onto the axially opposed surface of one of the relatively rotating members to convert a circumferential force to an axial thrust via said cam mechanism so that said relatively rotating members are integrally engaged with each other by said thrust;
• and
• a limiter means for limiting said relative rotational movement of said cam elements when said relative rotation occurs between said members in the direction reverse to that wherein said axial thrust is generated between the pair of members, wherein said cam roller is rotatably held by a roller cage disposed between said cam members, and said limiter means is a roller cage stopper for limiting said rotational movement of said pair of cam elements by restricting movement of said roller cage, and wherein said roller cage stopper comprises projections formed in said roller cage and recesses formed on said cam elements.