Abstract: Provided is a clutch device configured so that close contactability between a cam surface of a center clutch and a cam surface of a pressure clutch can be improved and torque transmission can be stabilized accordingly. The clutch device (100) includes a center clutch (105) and a pressure clutch (112). The center clutch (105) includes center-side cam portions (107), a pressure clutch slide portion (106), and a lifter plate slide portion (110). The pressure clutch (112) includes pressure-side cam portions (114), a lifter plate (116), and a second center clutch slide portion (113). The lifter plate (116) includes first center clutch slide portions (120). A clearance (C2) between the second center clutch slide portion (113) and the pressure clutch slide portion (106) is set greater than a clearance (C1) between the first center clutch slide portion (120) and the lifter plate slide portion (110).

Abstract: A power transmission device has a pressure member (5) pressing drive-side clutch plates and driven-side clutch plates against each other or releasing a press-contact force. A clutch spring (10) urges the pressure member (5) in a direction so that the clutch plates are pressed against each other. A separate receiving member (11) is attached to the pressure member (5). A back-torque limiting cam reduces press-contact force between the clutch plates when the rotation speed of an output member exceeds the rotation speed of an input member. A rotation restricting portion (8a) restricting rotation, relative to the clutch member (4), of the pressure member (5) that has moved due to activation of the push rod (9). A clearance t is maintained between the pair of cam surfaces that constitute the back-torque limiting cam.

Abstract: Provided is a clutch device configured so that close contactability between a cam surface of a center clutch and a cam surface of a pressure clutch can be improved and torque transmission can be stabilized accordingly. The clutch device (100) includes a center clutch (105) and a pressure clutch (112). The center clutch (105) includes center-side cam portions (107), a pressure clutch slide portion (106), and a lifter plate slide portion (110). The pressure clutch (112) includes pressure-side cam portions (114), a lifter plate (116), and a second center clutch slide portion (113). The lifter plate (116) includes first center clutch slide portions (120). A clearance (C2) between the second center clutch slide portion (113) and the pressure clutch slide portion (106) is set greater than a clearance (C1) between the first center clutch slide portion (120) and the lifter plate slide portion (110).

Abstract: A power transmission device has a pressure member 5, drive-side clutch plates, driven-side clutch plates, a clutch spring 10, a separate receiving member 11, and a back-torque limiting cam. A radially-outside restricting portion restricts radially-outward movement of the receiving member 11 relative to the pressure member 5. This maintains clearance t between a side surface 11d of the receiving member 11 and an inner peripheral wall 4e of a clutch member 4.

Abstract: A power transmission device has a pressure member (5) pressing drive-side clutch plates and driven-side clutch plates against each other or releasing a press-contact force. A clutch spring (10) urges the pressure member (5) in a direction so that the clutch plates are pressed against each other. A separate receiving member (11) is attached to the pressure member (5). A back-torque limiting cam reduces press-contact force between the clutch plates when the rotation speed of an output member exceeds the rotation speed of an input member. A rotation restricting portion (8a) restricting rotation, relative to the clutch member (4), of the pressure member (5) that has moved due to activation of the push rod (9). A clearance t is maintained between the pair of cam surfaces that constitute the back-torque limiting cam.

Abstract: A power transmitting apparatus for transmitting or cutting-off the rotational driving power inputted to an input member to or from an output member by press-contacting or releasing the press-contacting force between driving-side clutch discs and driven-side clutch discs, wherein the power transmitting apparatus comprises interlocking members (e.g., a first member and second member) interlocking with the motion of the weight members from their radially inward positions to radially outward positions and movable toward a direction approaching to the pressure member; and elastic members interposed between the interlocking members and the pressure member and able to move the pressure member toward a direction for press-contacting the driving-side clutch discs and the driven-side clutch discs by urging the pressure member according to the movement of the interlocking members and also able to absorb the urging force of the pressure member applied to interlocking members when the actuating member is operated.

Abstract: A power transmitting apparatus comprising a switching device for switching an urging device between an urging force applying position wherein an abutment between the other end of the urging device and the pressure member is kept to apply the urging force of urging device to the pressure member when the intermediate member is moved toward the pressure member, and an urging force cutting-off position wherein the other end of the urging device is separated from the pressure member to cut-off the urging force of urging device to the pressure member when the intermediate member is moved toward the pressure member. In some embodiments, the urging device is set at the urging force applying position while the intermediate member is stopped when the vehicle is stopped and the urging device is set at the urging force cutting-off position while the intermediate member is rotated when the vehicle is running.

Abstract: A power transmitting apparatus for transmitting or cutting-off the rotational driving power inputted to an input member to or from an output member by press-contacting or releasing the press-contacting force between driving-side clutch discs and driven-side clutch discs, wherein the power transmitting apparatus comprises interlocking members (e.g., a first member and second member) interlocking with the motion of the weight members from their radially inward positions to radially outward positions and movable toward a direction approaching to the pressure member; and elastic members interposed between the interlocking members and the pressure member and able to move the pressure member toward a direction for press-contacting the driving-side clutch discs and the driven-side clutch discs by urging the pressure member according to the movement of the interlocking members and also able to absorb the urging force of the pressure member applied to interlocking members when the actuating member is operated.

Abstract: A power transmitting apparatus comprising a switching device for switching an urging device between an urging force applying position wherein an abutment between the other end of the urging device and the pressure member is kept to apply the urging force of urging device to the pressure member when the intermediate member is moved toward the pressure member, and an urging force cutting-off position wherein the other end of the urging device is separated from the pressure member to cut-off the urging force of urging device to the pressure member when the intermediate member is moved toward the pressure member. In some embodiments, the urging device is set at the urging force applying position while the intermediate member is stopped when the vehicle is stopped and the urging device is set at the urging force cutting-off position while the intermediate member is rotated when the vehicle is running.

Abstract: In a first hydraulic clutch device 36 provided with a first clutch inner 84, a pressure bearing plate portion 84D disposed on the first clutch inner 84 opposing driving and driven friction plates 85 and 86, a clutch piston 91 that is consecutively disposed to a pressurizing plate portion 91D and moves to the side to pressurize the driving and driven friction plates 85 and 86 in accordance with an increase in a hydraulic pressure in a control hydraulic chamber 96, a piston guide 92 that forms a control hydraulic chamber 96 between itself and the clutch piston 91, and a canceller plate 93 that forms a hydraulic canceller chamber 97 on the side opposite to the control hydraulic pressure chamber 96, a projection portion 133 of the canceller plate 93 and a notch portion 122 disposed in the piston guide 92 and engaged with the projection portion 133 are engaged with each other and assembled, and a clip 135 that is engaged with an engagement groove 123 of the notch portion 122 and regulates axial movement of the can

Abstract: A power transmitting apparatus can include a clutch housing rotatable together with an input member and supporting a plurality of driving clutch plates. A clutch member can support a plurality of driven clutch plates alternately arranged between the driving clutch plates via spline fitting and connected to an output member. A pressure member can be mounted on the clutch member and axially movably therealong for carrying out the pressure-contact or release between the driving clutch plates and the driven clutch plates. Back-torque limiting cams can be configured to release the connection between the driving clutch plates and the driven clutch plates when the rotation speed of the output member has exceeded that of the input member. A rotational force input to the input member can be transmitted to or cut-off from the output member by carrying out the pressure-contact or release between the driving clutch plates and the driven clutch plates.

Abstract: In a multiple disc clutch apparatus 10, a cam member 41 which is disposed on a side of a clutch inner member 16 is formed into an annular shape. The cam member 41 extends in a radial direction so that an outer circumferential surface of the cam member 41 is brought into abutment with a cylindrical face 19d on an inner circumferential surface of a clutch center member 19.

Abstract: In a first hydraulic clutch device 36 provided with a first clutch inner 84, a pressure bearing plate portion 84D disposed on the first clutch inner 84 opposing driving and driven friction plates 85 and 86, a clutch piston 91 that is consecutively disposed to a pressurizing plate portion 91D and moves to the side to pressurize the driving and driven friction plates 85 and 86 in accordance with an increase in a hydraulic pressure in a control hydraulic chamber 96, a piston guide 92 that forms a control hydraulic chamber 96 between itself and the clutch piston 91, and a canceller plate 93 that forms a hydraulic canceller chamber 97 on the side opposite to the control hydraulic pressure chamber 96, a projection portion 133 of the canceller plate 93 and a notch portion 122 disposed in the piston guide 92 and engaged with the projection portion 133 are engaged with each other and assembled, and a clip 135 that is engaged with an engagement groove 123 of the notch portion 122 and regulates axial movement of the can

Abstract: In a multiple disc clutch apparatus 10, a cam member 41 which is disposed on a side of a clutch inner member 16 is formed into an annular shape. The cam member 41 extends in a radial direction so that an outer circumferential surface of the cam member 41 is brought into abutment with a cylindrical face 19d on an inner circumferential surface of a clutch center member 19.

Abstract: A power transmitting apparatus can include a clutch housing rotatable together with an input member and supporting a plurality of driving clutch plates. A clutch member can support a plurality of driven clutch plates alternately arranged between the driving clutch plates via spline fitting and connected to an output member. A pressure member can be mounted on the clutch member and axially movably therealong for carrying out the pressure-contact or release between the driving clutch plates and the driven clutch plates. Back-torque limiting cams can be configured to release the connection between the driving clutch plates and the driven clutch plates when the rotation speed of the output member has exceeded that of the input member. A rotational force input to the input member can be transmitted to or cut-off from the output member by carrying out the pressure-contact or release between the driving clutch plates and the driven clutch plates.

Abstract: A power transmission apparatus with a reaction force converted by a boosting mechanism used as a fastening force for an electromagnetic clutch has a solenoid (4); an electromagnetic clutch including a rotor (5) for transmitting the magnetic flux of the solenoid (4); an armature (8) attracted onto the rotor (5) by the magnetic flux, and a return spring (13) urging the armature (8) in a direction away from the rotor (5) to create a clearance “t” therebetween. A boosting mechanism converts a torque of the input member (housing) (2) to an axial thrusting force when the armature of the electromagnetic clutch is attracted onto the rotor. A main clutch connects the input member (2) and the output member (shaft) (3) via the thrusting force generated by the boosting mechanism. This transmits the torque of the input member (2) to the output member (3).

Abstract: A power transmission apparatus with a reaction force converted by a boosting mechanism used as a fastening force for an electromagnetic clutch has a solenoid (4); an electromagnetic clutch including a rotor (5) for transmitting the magnetic flux of the solenoid (4); an armature (8) attracted onto the rotor (5) by the magnetic flux, and a return spring (13) urging the armature (8) in a direction away from the rotor (5) to create a clearance “t” therebetween. A boosting mechanism converts a torque of the input member (housing) (2) to an axial thrusting force when the armature of the electromagnetic clutch is attracted onto the rotor. A main clutch connects the input member (2) and the output member (shaft) (3) via the thrusting force generated by the boosting mechanism. This transmits the torque of the input member (2) to the output member (3).