Abstract: A torsional vibration damper is provided that is capable of increasing torsional rigidity without increasing a size of an elastic member in a radial direction. A torsional vibration damper includes a boss member and a disk plate provided coaxially with each other; an elastic member being elastically deformable in a rotation direction of the boss member; a cam member rotating integrally with the boss member; a torque transmission member transmitting rotation torque between the boss member and the disk plate; and a socket member provided between the torque transmission member and the elastic member and having a contact surface coming in contact with the torque transmission member. The torque transmission member is capable of entirely reciprocating in a radial direction of the boss member in accordance with rotation of the cam member, and elastically compresses the elastic member when it moves outward in the radial direction of the boss member.

Abstract: Providing a torsional vibration damping device capable of increasing torsional stiffness without increasing elastic members in the radius direction. In the torsional vibration damping device 1, a spring seat 16 for holding an end portion 4a of a coil spring 4 is provided between the other end 19b of an arm member 19 and the coil spring 4, and the spring seat 16 which contacts the other end 19b of the arm member 19 is constituted of a tapered face 16a.

Abstract: A torsional vibration damper is provided that is capable of increasing torsional rigidity without increasing a size of an elastic member in a radial direction. A torsional vibration damper includes a boss member and a disk plate provided coaxially with each other; an elastic member being elastically deformable in a rotation direction of the boss member; a cam member rotating integrally with the boss member; a torque transmission member transmitting rotation torque between the boss member and the disk plate; and a socket member provided between the torque transmission member and the elastic member and having a contact surface coming in contact with the torque transmission member. The torque transmission member is capable of entirely reciprocating in a radial direction of the boss member in accordance with rotation of the cam member, and elastically compresses the elastic member when it moves outward in the radial direction of the boss member.

Abstract: The torsional shock absorbing apparatus includes a boss, a cam member provided on the boss to be integrally rotated with the boss and having a cam surface formed in an oval shape, and an arm member disposed between the cam member and a coil spring to transmit the rotation torque of the disc plates to the boss. The arm member has one end portion held in contact with the cam surface and the other end portion held in engagement with circumferential one end portion of the coil spring, and is swingable around the center of a pin provided on the disc plates.

Abstract: The torsion angle between a first rotation member and a second rotation member can be increased to lower the rigidity of a resilient member, thereby enhancing the attenuation property of torsional vibration. The torsional vibration damping apparatus 1 comprises a pair of disc plates 4, 5 having the rotation torque from an internal combustion engine transmitted thereto, input gears 9, 10 rotatably supported on the disc plates 4, 5, an output gear 13 provided to be relatively rotatable with respect to the disc plates 4, 5 and held in mesh with the input gears 9, 10, a boss member 7 splined to an input shaft 8 of a power transmission train, and a coil spring 14 having one end portion fastened to the input gear 9 and the other end portion fastened to the input gear 10.

Abstract: The torsion angle between a first rotation member and a second rotation member can be increased to lower the rigidity of a resilient member, thereby enhancing the attenuation property of torsional vibration. The torsional vibration damping apparatus 1 comprises a pair of disc plates 4, 5 having the rotation torque from an internal combustion engine transmitted thereto, input gears 9, 10 rotatably supported on the disc plates 4, 5, an output gear 13 provided to be relatively rotatable with respect to the disc plates 4, 5 and held in mesh with the input gears 9, 10, a boss member 7 splined to an input shaft 8 of a power transmission train, and a coil spring 14 having one end portion fastened to the input gear 9 and the other end portion fastened to the input gear 10.

Abstract: This apparatus is provided with a clutch mechanism 14. The clutch mechanism 14 is interposed between an engine 11 and a transmission 15, and is coupled to a clutch pedal 28. An operating mode of the clutch mechanism 14 changes in conjunction with a change of an operating position of the clutch pedal 28. In the case that an execution condition is met, the apparatus lowers a maximum operating speed of the clutch mechanism 14 in comparison with a state in which an execution condition is not met. The execution condition includes the following execution start condition that “the operating position of the clutch pedal 28 is a position setting the clutch mechanism 14 to a disengaged state, and a changing speed of the operating position of the clutch pedal 28 in an engaging direction at a time of setting the clutch mechanism 14 to an engaged state from the disengaged state is equal to or higher than a predetermined starting speed”.

Abstract: To provide a torsional shock absorbing apparatus which can obtain a non-linear torsional characteristic having a large torsion angle of a driving rotation member and a driven rotation member, and can prevent an extremely large torque from being transmitted to the driven rotation member. The torsional shock absorbing apparatus comprises a boss, a cam member provided on the boss to be integrally rotated with the boss and having a cam surface formed in an oval shape, and an arm member disposed between the cam member and a coil spring to transmit the rotation torque of the disc plates to the boss. The arm member has one end portion held in contact with the cam surface and the other end portion held in engagement with circumferential one end portion of the coil spring, and is swingable around the center of a pin provided on the disc plates.

Abstract: This apparatus is provided with a clutch mechanism 14. The clutch mechanism 14 is interposed between an engine 11 and a transmission 15, and is coupled to a clutch pedal 28. An operating mode of the clutch mechanism 14 changes in conjunction with a change of an operating position of the clutch pedal 28. In the case that an execution condition is met, the apparatus lowers a maximum operating speed of the clutch mechanism 14 in comparison with a state in which an execution condition is not met. The execution condition includes the following execution start condition that “the operating position of the clutch pedal 28 is a position setting the clutch mechanism 14 to a disengaged state, and a changing speed of the operating position of the clutch pedal 28 in an engaging direction at a time of setting the clutch mechanism 14 to an engaged state from the disengaged state is equal to or higher than a predetermined starting speed”.

Abstract: A power transmission device includes a power input member that rotates when torque is applied thereto, a power output member that puts out the torque, and a transmitting member that transmits the torque of the power input member to the power output member. The power input member and the power output member have substantially the same axis of rotation. The power transmission device has twisting characteristics with which the magnitude of the torque generated from the power output member continuously changes along a curve, with respect to a relative angle of twist between the power input member and the power output member.