Abstract: A differential apparatus includes a differential mechanism, a differential case that accommodates the differential mechanism, and a clutch mechanism that transmits a driving force between the differential case and the differential mechanism. The clutch mechanism includes a side member movable inside the differential case in an axial direction and an actuator for moving the slide member to the axial direction. The slide member has a first meshable portion at one end in the axial direction, is allowed to move relative to the differential mechanism, and is prevented from rotating relative to the differential mechanism. The differential case has a second meshable portion facing the first meshable portion in the axial direction.

Abstract: A power transmission interrupting device includes: an interrupting member that is restrained from rotating relative to the first rotating member, has engaging teeth engaging with a second rotating member, and is movable in an axial direction between a coupling position at which the engaging teeth engage with the second rotating member and an uncoupling position at which the engaging teeth do not engage with the second rotating member; and a moving mechanism that moves the interrupting member in the axial direction. The moving mechanism has an annular electromagnet, a yoke, and a moving member. The moving member has a cylindrical part facing an inner circumferential surface or an outer circumferential surface of the electromagnet, and an annular cover extending from one end of the cylindrical part in a radial direction and covering one of axial end faces of the electromagnet.

Abstract: A differential apparatus includes a differential mechanism, a differential case that accommodates differential mechanism, and a clutch mechanism that transmits a driving force between the differential case and the differential mechanism. The clutch mechanism includes a slide member movable inside the differential case in an axial direction and an actuator for moving the slide member in the axial direction. The actuator is located outside the differential case. The slide member includes a first meshable portion and an engaging portion engaging with a pinion shaft of the differential mechanism. The differential case has a second meshable portion to mesh with the first meshable portion and a wall portion having multiple insertion holes for transmitting a moving force of the actuator to the slide member. The slide member is located between the second meshable portion and the wall portion.

Abstract: A dog clutch includes: a first rotational member; a second rotational member; a clutch member; and a pressing mechanism. The clutch member includes a meshing portion meshing with the second rotational member, an engageable portion circumferentially engaging with an engaged portion provided in the first rotational member, and a cam surface configured to generate a cam thrust in a direction of a rotation axis by a relative rotation with respect to the first rotational member. When the clutch member moves, a depth of meshing with the second rotational member is deepened by the cam thrust, and then the engageable portion engages with the engaged portion, so that the clutch member receives a torque from the first rotational member.

Abstract: A power transmission interrupting device includes: an interrupting member restrained from rotating relative to a first rotating member and movable in an axial direction between a coupling position at which the interrupting member engages with the second rotating member and an uncoupling position; and a moving mechanism moving the interrupting member in the axial direction. The moving mechanism has a magnetic flux generation unit, a holder unit, and a moving member. The holder unit includes: a yoke having a cylindrical part that faces the magnetic flux generation unit in a radial direction; and a restraint member having an axial movement restraining part that is fixed to the yoke and restrains the magnetic flux generation unit from moving in the axial direction relative to the cylindrical part, and a rotation restraining part that is locked in a locking portion provided in the case member and restrains the yoke from rotating.

Abstract: A differential gear includes: a first output gear; a second output gear; a differential case; a clutch member configured to move in a direction of a rotation axis between a connecting position where the differential case is connected to the first output gear in a relatively non-rotatable manner and a non-connecting position where the differential case and the first side gear are allowed to rotate relative to each other; an electromagnetic coil having a cylindrical shape and configured to move the clutch member in the direction of the rotation axis; and a yoke having an annular shape and serving as a magnetic path of a magnetic flux of the electromagnetic coil. The clutch member has an outermost diameter smaller than an inside diameter of the yoke.

Abstract: A differential apparatus includes a differential mechanism, a differential case that accommodates the differential mechanism, and a clutch mechanism that transmits a driving force between the differential case and the differential mechanism. The clutch mechanism includes a slide member movable inside the differential case in an axial direction and an actuator. The slide member has a first meshable portion at one end in the axial direction, is allowed move relative to the differential mechanism in the axial direction, and is prevented from rotating relative to the differential mechanism. The differential case includes a first case member and a second case member that are united to form the differential case. The first case member integrally includes a second meshable portion and a flange portion that the ring gear is fastened to.

Abstract: A dog clutch includes: a first rotational member; a second rotational member; a clutch member; an electromagnetic coil; and a position detecting portion. A control method for the dog clutch, includes: supplying an exciting current to the electromagnetic coil when the clutch member is moved from the non-connecting position toward the connecting position; and promptly reducing the exciting current when the position detecting portion detects that the clutch member has moved to the connecting position.

Abstract: A differential apparatus includes a differential mechanism, a differential case that accommodates differential mechanism, and a clutch mechanism that transmits a driving force between the differential case and the differential mechanism. The clutch mechanism includes a slide member movable inside the differential case in an axial direction and an actuator for moving the slide member in the axial direction. The actuator is located outside the differential case. The slide member includes a first meshable portion and an engaging portion engaging with a pinion shaft of the differential mechanism. The differential case has a second meshable portion to mesh with the first meshable portion and a wall portion having multiple insertion holes for transmitting a moving force of the actuator to the slide member. The slide member is located between the second meshable portion and the wall portion.

Abstract: A differential apparatus includes a differential mechanism, a differential case that accommodates the differential mechanism, and a clutch mechanism that transmits a driving force between the differential case and the differential mechanism. The clutch mechanism includes a side member movable inside the differential case in an axial direction and an actuator for moving the slide member to the axial direction. The slide member has a first meshable portion at one end in the axial direction, is allowed to move relative the differential mechanism, and is prevented from rotating relative to the differential mechanism. The differential case has a second meshable portion facing the first meshable portion in the axial direction.

Abstract: A differential apparatus includes a differential mechanism, a differential case that accommodates the differential mechanism, and a clutch mechanism that transmits a driving force between the differential case and the differential mechanism. The clutch mechanism includes a slide member movable inside the differential case in an axial direction and an actuator. The slide member has a first meshable portion at one end in the axial direction, is allowed move relative to the differential mechanism in the axial direction, and is prevented from rotating relative to the differential mechanism. The differential case includes a first case member and a second case member that are united to form the differential case. The first case member integrally includes a second meshable portion and a flange portion that the ring gear is fastened to.

Abstract: A power transmission interrupting device includes: an interrupting member restrained from rotating relative to a first rotating member and movable in an axial direction between a coupling position at which the interrupting member engages with the second rotating member and an uncoupling position; and a moving mechanism moving the interrupting member in the axial direction. The moving mechanism has a magnetic flux generation unit, a holder unit, and a moving member. The holder unit includes: a yoke having a cylindrical part that faces the magnetic flux generation unit in a radial direction; and a restraint member having an axial movement restraining part that is fixed to the yoke and restrains the magnetic flux generation unit from moving in the axial direction relative to the cylindrical part, and a rotation restraining pan that is locked in a locking portion provided in the case member and restrains the yoke from rotating.

Abstract: A power transmission interrupting device includes: an interrupting member that is restrained from rotating relative to the first rotating member, has engaging teeth engaging with a second rotating member, and is movable in an axial direction between a coupling position at which the engaging teeth engage with the second rotating member and an uncoupling position at which the engaging teeth do not engage with the second rotating member; and a moving mechanism that moves the interrupting member in the axial direction. The moving mechanism has an annular electromagnet, a yoke, and a moving member. The moving member has a cylindrical part facing an inner circumferential surface or an outer circumferential surface of the electromagnet, and an annular cover extending from one end of the cylindrical part in a radial direction and covering one of axial end faces of the electromagnet.

Abstract: A dog clutch includes: a first rotational member; a second rotational member; a clutch member; and a pressing mechanism. The clutch member includes a meshing portion meshing with the second rotational member, an engageable portion circumferentially engaging with an engaged portion provided in the first rotational member, and a cam surface configured to generate a cam thrust in a direction of a rotation axis by a relative rotation with respect to the first rotational member. When the clutch member moves, a depth of meshing with the second rotational member is deepened by the cam thrust, and then the engageable portion engages with the engaged portion, so that the clutch member receives a torque from the first rotational member.

Abstract: A differential gear includes: a first output gear; a second output gear; a differential case; a clutch member configured to move in a direction of a rotation axis between a connecting position where the differential case is connected to the first output gear in a relatively non-rotatable manner and a non-connecting position where the differential case and the first side gear are allowed to rotate relative to each other; an electromagnetic coil having a cylindrical shape and configured to move the clutch member in the direction of the rotation axis; and a yoke having an annular shape and serving as a magnetic path of a magnetic flux of the electromagnetic coil. The clutch member has an outermost diameter smaller than an inside diameter of the yoke.

Abstract: A dog clutch includes: a first rotational member; a second rotational member; a clutch member; an electromagnetic coil; and a position detecting portion. A control method for the dog clutch, includes: supplying an exciting current to the electromagnetic coil when the clutch member is moved from the non-connecting position toward the connecting position; and promptly reducing the exciting current when the position detecting portion detects that the clutch member has moved to the connecting position.

Abstract: A four-wheel drive vehicle are provided which enable enhancement of responsiveness to switching from a two-wheel drive state to a four-wheel drive state. A four-wheel drive vehicle includes a driving force transmission and cut-off apparatus that enables cut-off of transmission of a driving force from an engine to a propeller shaft, a driving shaft that rotates under a tuning force of the propeller shaft, a pair of hydraulic clutches and each disposed between the driving shaft and a corresponding one of rear wheels, and a control apparatus that controls a hydraulic unit that supplies hydraulic oil to the hydraulic clutches. In shifting the two-wheel drive state to the four-wheel drive state, the control apparatus controls the hydraulic unit such that a higher priority is given to supply of the hydraulic oil to first hydraulic clutch than to supply of the hydraulic oil to second hydraulic clutch.

Abstract: A four-wheel drive vehicle are provided which enable enhancement of responsiveness to switching from a two-wheel drive state to a four-wheel drive state. A four-wheel drive vehicle includes a driving force transmission and cut-off apparatus that enables cut-off of transmission of a driving force from an engine to a propeller shaft, a driving shaft that rotates under a tuning force of the propeller shaft, a pair of hydraulic clutches and each disposed between the driving shaft and a corresponding one of rear wheels, and a control apparatus that controls a hydraulic unit that supplies hydraulic oil to the hydraulic clutches. In shifting the two-wheel drive state to the four-wheel drive state, the control apparatus controls the hydraulic unit such that a higher priority is given to supply of the hydraulic oil to first hydraulic clutch than to supply of the hydraulic oil to second hydraulic clutch.

Abstract: An apparatus includes: a cam that has two cam members disposed facing each other and produces thrust in an axis direction; an attracting member that creates friction force by attracting the cam members into contact with the attracting member by magnetic attraction force; an attracted member that is attached to one cam member of the two so as to rotate integrally together with the one cam member and be relatively movable in the axis direction, and that is attracted by the attracting member into contact with the attracting member so that the friction force is produced; a first return spring that exerts elastic force on the attracted member so as to move the attracted member away from the attracting member against the magnetic attractive force; and a second return spring that exerts elastic force on the one cam member.

Abstract: A control apparatus for a vehicular drive system includes a pair of drive shafts, a differential gear device for distributing a received drive torque to left and right drive wheels through the respective drive shafts, a control clutch associated with one of the drive shafts and configured to switch between its engaged and released states, and a braking device disposed to apply a braking force to one of the drive wheels which is disposed to the other of the drive shafts. The control apparatus includes: a torque control portion configured to operate the braking device for reducing the torque to be transmitted to the one of the drive wheels, in the event of an abrupt increase of the torque received by the differential gear device while the control clutch is placed in the engaged state.