Abstract: In order to avoid competition with other components for a space, to thereby improve the degree of designing freedom, the power transmission apparatus includes a transfer case housing and supporting a ring gear and a pinion gear that orthogonally mesh with each other and form an orthogonal gear set, the transfer case is divided into a first case part and a second case part along a division plane that extends along an axis of rotation of the ring gear, and the first and second case parts and are fixed together along the division plane with bolts.

Abstract: A power transmission apparatus is capable of easily passing lubricant toward a seal arranged between a higher shat and an opening of a case of the apparatus. The apparatus includes the higher shaft, i.e., a hollow connecting shaft that faces the outside of the transfer case through the opening of the transfer case. The oil seal is arranged between the hollow shaft and the opening of the transfer case. The hollow shaft meshes, through helical spur gears, with an intermediate transferring shaft that is positioned lower than the hollow shaft. A lubricant guide is arranged to receive lubricant splashed up by the ring gear and helical spur gear of the intermediate shaft and guide the received lubricant toward the oil seal and a ball bearing.

Abstract: A driving force transmitting apparatus has a first division casing member having a first coupling surface, a second division casing member having a second coupling surface, wherein a casing is formed by matching the first and second casing members at the first and second coupling surfaces, a first rotational shaft rotatably supported by the first and the second division casing members, wherein a center of rotation of the first rotational shaft is located in a common plane of the first and second coupling surfaces, a first gear provided on the first rotational shaft, a second rotational shaft rotatably supported with respect to the first division casing member, a second gear provided on the second rotational shaft and being in mesh with the first gear, and a partition wall integrally formed on the second division casing member and extending in a direction intersecting with said common plane.

Abstract: A differential device differentially distributes a driving force to first and second axles. The differential device is comprised of a differential gear set configured to allow differential motion between the first and second axles, a casing rotatable about an axis, the casing housing and being drivingly coupled with the differential gear set and including a first end wall, a second end wall axially opposed to the first end wall, and a side wall disposed radially outward, which in combination with the first end wall and the second end wall defines a chamber configured to house the differential gear set, a clutch engageable with the differential gear set, a solenoid configured to drive the clutch, which is disposed adjacent to the first end wall, and a magnetic core fixed to the solenoid. The magnetic core is comprised of a sleeve portion snugly and slidably fitting around an outer periphery of the side wall to radially position the core and the solenoid in place.

Abstract: A differential device for a vehicle includes a differential casing 15, pinion shafts 25, 27 connected to through-holes of the differential casing 15, pinion gears 3 supported by the pinion shafts 25, 27, a differential mechanism 9 having side gears 5, 7 meshing with the pinion gears 3, a limited-slip differential 11 for limiting a differential rotation of the differential mechanism 9 and an actuator 13 for controlling the limited-slip differential 11. A ring gear is fixed on a flange part 17 of the differential casing 15. The flange part 17 is positioned on one side of the differential casing 15 in an axial direction of the differential casing disproportionately. The actuator 13 is arranged so as to abut on the flange part 17. The differential casing 15 is divided into casing pieces by a parting part 19 on one side of the differential casing 15 in opposition to the flange part 17 in the axial direction. The casing pieces are connected with each other by connecting members 21.

Abstract: A power transmission device 1 includes a power transmitting mechanism 15 having a first casing 3, a speed change mechanism 13 and first oil and an intermittent mechanism 27 having a pair of rotating members 17, 19, an intermittent part 21, an actuator 23, a second casing 25 and second oil. The second casing 25 includes a first casing member 33 having a cylindrical part 29 and one end wall 31 and a second casing member 37 having another end wall 35 connected to the cylindrical part 29 integrally. The second casing 25 further includes a sealing member 39 arranged between the rotating member 19 and the end wall 31, another sealing member 41 arranged between the rotating member 19 and the other end wall 35 and an O ring arranged between the first casing 33 and the second casing 37, respectively. The second oil is enclosed in the second casing 25.

Abstract: A torque transmission apparatus includes first and second torque transmission members 3, 5, a frictional clutch 7 for transmitting a torque between the torque transmission members 3, 5, a stationary housing 11 accommodating a coupling 9, a spatial part for enclosing oil in the stationary housing 11 and an opening 15 formed in a part of the coupling 9 so that the oil in the stationary housing 11 is introduced into the coupling 9.

Abstract: A differential gear has a simple structure, is able to produce a difference of differential limiting force between a driving operation of a vehicle in which the differential gear is installed and a coasting operation of the vehicle, secures the strength of a thrust bearing adopted for the differential gear, and provides a stabilized differential limiting force, in the driving operation, helical side gears receive thrusting forces acting away from each other, the differential case has inward support faces to axially support the helical side gears, the helical side gear has an annular inward counter face and an annular outward counter face on the inner circumferential side of opposite ends of a teeth area, and between the inward counter faces, there is a thrust bearing having a plurality of circumferentially arranged rollers.

Abstract: A driving force transmitting apparatus is provided with a breather chamber. The breather chamber is defined by a first partition wall, a second partition wall, a third partition wall, an outer wall of a first division casing member and an outer wall of an second division casing. The first partition wall is integrally formed on the first division casing member and extending in a matching direction of the first and the second division casing members. The second partition wall is integrally formed on the second division casing member and extending in the matching direction. The third partition wall crosses the first partition wall and is apart from a common plane of first and second coupling surfaces in the matching direction.

Abstract: A driving force transmitting apparatus has a first division casing member having a first coupling surface, a second division casing member having a second coupling surface, wherein a casing is formed by matching the first and second casing members at the first and second coupling surfaces, a first rotational shaft rotatably supported by the first and the second division casing members, wherein a center of rotation of the first rotational shaft is located in a common plane of the first and second coupling surfaces, a first gear provided on the first rotational shaft, a second rotational shaft rotatably supported with respect to the first division casing member, a second gear provided on the second rotational shaft and being in mesh with the first gear, and a partition wall integrally formed on the second division casing member and extending in a direction intersecting with said common plane.

Abstract: A reduction drive device is compact, hardly causes an electric motor thereof to vibrate, and has improved noise/vibration controllability. The reduction drive device includes the electric motor attached to a casing and capable of outputting torque, first and second reduction mechanisms supported by the casing, to reduce and transmit the rotational output of the electric motor, and a rear differential supported by the casing, to distribute the rotational output reduced by the first and second reduction mechanisms to a pair of axle shafts. Rotor, stator, and brush of the electric motor partly overlap the rear differential when seen in a rotation radius direction.

Abstract: An apparatus includes an input-side rotating member 2 driven by an engine (driving source) 90, an output-side rotating member 3 for driving an input member, such as a gear part 25 of a rear differential (driving-force distributing mechanism) 97 between wheels, a friction clutch 4 arranged between the input-side rotating member 2 and the output-side rotating member 3, a carrier housing (stationary member) 5 capable of accommodating the rear differential 97 and the friction clutch 4, an oil accommodating space (lubricant accommodating space) S formed in the stationary member 5 and an oil pump 6 driven by the output-side rotating member 3 to supply the friction clutch 4 with oil 600.

Abstract: A clutch device 2 has a diff case 19 rotatable with drive torque, side gears 11, 13 to which the drive torque is transferred from the diff case 19, a clutch ring 63 held in constant connection to the diff case 19 and axially movable to the side gears 11, 13 to be intermittently coupled thereto, and an electromagnetic actuator 29 operative to axially move the clutch ring 63. The electromagnetic actuator 29 includes an electromagnetic solenoid 25, and a plunger 27 axially movable in response to magnetic force of the electromagnetic solenoid 25 for axially moving the clutch ring 63. The electromagnetic solenoid 25 is disposed on the diff case 19 so as not to relatively move in an axial direction, and the diff case 19 forms a part of a magnetic flux path of the electromagnetic solenoid 25.

Abstract: A clutch device is combinable with a rotating device rotating about an axis. The clutch device is provided with a clutch rotatable with the rotating device, a plunger for disengageably engage the clutch, a solenoid for generating a magnetic flux for driving the plunger, a magnetic core slidably fitting on a portion of the rotating device and incompletely enclosing the solenoid to expose the solenoid to the portion, and a support member configured to support the magnetic core to fit with the rotating device in an axial direction along the axis. The magnetic core in combination with the portion of the rotating device and the plunger is so dimensioned as to enclose the solenoid.

Abstract: An outer plate 31, which is used under a lubricated environment of a differential gear oil including a friction adjuster, is made of a SC tempered material which is subjected to nitriding treatment to suppress chemical adsorption of the friction adjuster. An inner plate 33 has paper on a surface thereof. The outer plate 31 and the inner plate 33 are provided to apply or release the torque between an outer differential case 3 and an inner differential case 5 of a rear differential device 1 having the outer differential case 3 and the inner differential case 5 capable of relatively rotating to the inside and the outside.

Abstract: A differential device is provided with a case being capable of rotation around a rotation axis; a differential gear set housed in and drivingly coupled to the case, which includes first and second output gears and is configured to differentially transmit the rotation of the case to the first and second output gears; a clutch configured to controllably limit and free a differential motion between the first and second output gears, which is housed in the case; an actuator configured to actuate the clutch; and a notifying member configured to notify whether the differential motion is limited or freed to an exterior of the case.

Abstract: An electromagnetic clutch is provided with: a clutch hub which is connected to a shaft member (one of a pair of rotation members); a clutch housing which is connected to a hollow shaft (the other of a pair of rotation members); a rotor which is connected to the clutch housing; a main clutch (clutch member) which is disposed between the clutch hub and the clutch housing; and an electromagnet which operates the main clutch. An end surface of the clutch housing and an end surface of a core of the electromagnet are disposed to be opposed to each other with the rotor interposed therebetween in an axial direction. The end of the rotor in a side of the clutch housing is formed with an extension portion which extends to the clutch housing in the axial direction. An outer periphery of the clutch housing is connected to the extension portion through a connection portion. The connection portion is disposed outside the main clutch in a radial direction.

Abstract: In an electromagnetic clutch apparatus for forming a magnetic path in a circulating shape by an electromagnet at a pilot clutch alternately arranged with a main outer plate and a main inner plate and capable of controlling to transmit a torque between a clutch housing and a cam plate by being engaged in an axial direction and at a surrounding of a nonmagnetic portion continuously formed in the axial direction of a middle portion in a diameter direction of the pilot clutch to carry out an engaging, the nonmagnetic portion is formed by through holes in a circular arc shape having bridge portions for maintaining a shape in a diameter direction of the pilot clutch therebetween in a peripheral direction, and the bridge portion is divided in the diameter direction of the pilot clutch and a nonmagnetic member is interposed between divisions thereof.

Abstract: A differential device for differentially distributing a driving force to axles along an axis is disclosed. The differential device has a case being capable of rotation about the axis, which includes a flange configured to receive the driving force and a shaft crossing the case perpendicularly to the axis; an opening defined by a peripheral border on an outer periphery of the case so as to allow access into the case, lateral extremities of which is deviated from a center of the shaft toward a direction opposite to the flange along the axis; and a differential gear set housed in and drivingly coupled to the case, the differential gear set including an input gear rotatable around the shaft and output gears so combined with the input gear as to differentially distribute the driving force to the output gears, the output gears being drivingly coupled to the axles.

Abstract: A differential device includes a differential casing 15 having a cylindrical part 3, first and second sidewalls 5, 7 formed on both sides of the cylindrical part 3 and a flange part 13 formed on the outer circumference of the first sidewall 5, a differential mechanism 23 having a differential member 17 to which a driving force is transmitted from the differential casing 15 and first and second output members 19, 21 both engaged with the differential member 17 to distribute the driving force, a diff lock mechanism 29 having a clutch member 25 rotatable integrally with the first sidewall 5 and connectable with the first output member 19 by a relative movement of the clutch member 25 to the first sidewall 5 in the axial direction of the cylindrical part 3 and an actuator 27 for moving the clutch member 25 in the axial direction of the cylindrical part 3 and a differential restraint mechanism 33 having a frictional clutch 31 arranged on the side of the second sidewall 7, for restraining a relative rotation of the