Abstract: A motor power train which includes a reducer for amplifying motor drive torque, a differential device with a clutch mechanism and a differential gear unit to allocate the drive torque to wheels, and a casing for housing them. The reducer includes a first shaft as an input shaft; a second shaft to which the drive torque is transmitted form the first shaft; a first reduction gear set with a first gear on the first shaft and a second gear on the second shaft; and a second reduction gear set with a third gear on the second shaft and a fourth gear provided on the clutch mechanism of the differential device. The fourth gear and a large-diameter portion of the differential gear unit are offset in axial position without overlapping.

Abstract: A first power train (T1) for driving a pair of front drive wheels (Wf1, Wf2) comprises a transmission (5) connected to an engine (3) and a front drive train (Df1) including a front final reduction gear (9) connected to the transmission and a front differential gear (15) connected between the front final reduction gear and the front drive wheels, and a second power train (T2) for driving a pair of rear drive wheels (Wr1, Wr2) comprises a rear transfer train (Tr1) branched from the front drive train between the front final reduction gear and the front differential gear and a rear drive train (Dr) connected to the rear drive wheels.

Abstract: A wet type friction clutch and an electromagnetic clutch is disclosed wherein a pilot clutch 61 is disposed in a magnetic flux path 95 of an electromagnet 57 and is kept between an armature 71 and the electromagnet 57. Upon excitation of the electromagnet 57, the armature 57 is retracted to allow the pilot clutch 61 to be coupled. The pilot clutch 61 includes a plurality of clutch plates 87, 89 which are interleaved with respect to one another for sliding movements. Adjacent clutch plates 87, 87A, 87B, 89, 89A, 89B, 89C, 89D, 89E, 89F are formed with oil guide passageways 86, 96, 98, 106, 108, 110, 114 to create a hydrodynamic pressure effect to allow the clutch plates to be separated with a limited drag torque.

Abstract: A differential gear mechanism includes a rotatable case driven by torque from an engine, a differential gear set housed in the case for differential distribution of the torque to a pair of output axes, comprising a first clutch, an annular plunger movable in a direction of the rotation axis and an annular electromagnetic actuator for actuation of the plunger in the direction of the rotation axis. The case further comprises a second clutch being slidable in the direction of the rotation axis and the second clutch is actuated by the plunger so as to be engaged with the first clutch.

Abstract: A coupling for a vehicle includes a pilot clutch 15, a main clutch 13, a pressing system 21 and a coupling mechanism 17. The pilot clutch 15 generates a pilot torque and is operated by operating means 19. The main clutch 13 connects torque members 11 and 9 and transmits transmitted torque. The coupling mechanism 17 operated by the pilot torque converts the pilot torque into a pressing force for coupling the main clutch 13 via the pressing system 21 by use of a cam thrust force thereof. The main clutch 13 is disposed outside the pilot clutch 15 in a radial direction, and respective members of the pressing system 21 are mutually positioned and designed to move unitarily in a pressing direction, thus sliding portions caused by the main clutch 13 is connecting and disconnecting are limited to being on a side of the main clutch 13.

Abstract: An electromagnetic wet clutch system includes operation members configured to magnetically work. The system includes a set of clutch plates configured to engage by the operation members. The set of clutch plates includes first plates with first sides. Respective one of the first sides is configured to contact respective one of the operation members. At least one of the first sides is boundary-lubricative.

Abstract: There is provided with a first clutch. A second clutch is for controlling fastening and releasing operation of the first clutch. The first clutch and the second clutch are radially differently and axially correspondently positioned each other.

Abstract: A differential case has therein a bevel gear type differential mechanism, difference limiting main and pilot clutches, and a cam mechanism for increasing engagement force of the pilot clutch to be transmitted via a transmission member for actuation of the main clutch. Vehicular axles inserted in the differential cases are connected to torque-outputting side gears with circlips for removal prevention thereof and a thrust block to fill a space therebetween. The circlips and the thrust block are applied from the outside through apertures formed in the differential case and the transmission member.

Abstract: An outer rotational member has an inner wall surface and an outer wall surface. An inner rotational member is arranged inside the outer rotational member. Friction-clutch means is provided between the inner rotational member and the outer rotational member and is fastened by a thrust force. An oil lubricates at least the friction-clutch means. An oil space intervenes between the inner rotational member and the outer rotational member. Seal means seals the oil in the oil space. A first oil reservoir is recessed on the inner wall surface of the outer rotational member toward a side of the outer wall surface side.

Abstract: A structure and a method for supporting an electromagnetic coupling (1) onto a vehicle body (347) is disclosed as being interposed between a center support bearing (37) remaining closer to a propeller shaft (319) and a center support bearing (37) remaining closer to a propeller shaft (321). The center support bearings (37, 37) are fixedly mounted to the vehicle body via shock absorbing members (35, 35), respectively.

Abstract: The differential includes a differential housing (7A, 7B) A torque transmission member (5A, 5B) is supported to a differential housing (7A, 7B) for rotating relative to the differential housing. A clutch system (13A, 13B) is configured to interconnect between the torque transmission member (5A, 5B) and the differential housing (7A, 7B) for transmitting a drive torque therebetween.

Abstract: A transmission apparatus (3) outputs drive power of a motor, from a speed changing mechanism (5, 7), via a sub-shaft (25), a power distribution apparatus (4) transmits rotation of an input end member (67) linked to the sub-shaft (25), via output shafts (83, 85), to the front-wheel end and the rear-wheel end, and the sub-shaft (25) and the power distribution apparatus (4) are disposed in an axially overlapping relationship.

Abstract: A power transmission apparatus has a transmission mechanism (3) having an input shaft (19), speed changing units (7) and (9) disposed coaxially therewith, and a power distribution apparatus (5) linked to sub-shaft (31) via a power transmission mechanism (47) disposed in parallel with the sub-shaft (31), which transmits input rotation from output shafts (41, 43) to front and rear wheels.

Abstract: A fluid machine includes: a casing having an operating chamber provided in the casing; a pair of rotors rotatably mounted in the operating chamber which have each rotor shaft in each axial direction; an intake opening and discharge opening for fluid and are connected with the operating chamber, respectively; and silencing means provided in at least one of an existing space forming fluid channel on the intake opening side and an existing space forming a fluid channel on the discharge opening side. In the structure, the existing spaces are located between the intake opening and the operating chamber and between the discharge opening and the operating chamber, respectively. Furthermore, at least one among the intake opening and the discharge opening of the fluid where the silencing means is disposed is provided so as to be at parallel with the rotor shafts.

Abstract: In a vertical press that simultaneously forms chamfers at edges on both sides of a punched sheet material by using an upper chamfering punch and a lower chamfering punch, the lower chamfering punch is supported by conical disc springs piled on a support base.

Abstract: A fluid machine comprises a rotor (7, 9) meshed with each other in concave and convex portions (23, 26) and (25, 24), and a casing (3) enveloping these elements within cylindrical portions (43, 45) of a rotor chamber (5) and having a flow inlet port (31) and a flow outlet port (33). The cylindrical portions (43, 45) are moved to moved centers (47, 49) from standard centers (35, 37) at a predetermined distance L toward the flow inlet port (31), so that the rotor chambers (5) is expanded to cylindrical portions (55, 57) from the cylindrical portions (43, 45).

Abstract: A pair of rotors (1,3) includes tooth parts (7,9) with a cycloid tooth profile curve and tooth bottom pans (11,13), and are engaged with each other. A housing (2) includes rotor chambers (2a) for rotatably accommodating the rotors (1,3), a suction port and a delivery port. Tips of the tooth parts (7,9) of the rotors (1,3) respectively have top parts (15,17) with a predetermined arc length (W.sub.1) which are cut to have a diameter (D.sub.2) smaller than a diameter (D.sub.1) of the tips of the predetermined cycloid tooth profile curve, and a diameter of the rotor chambers (2a) is made small.

Abstract: A first power train (T1) for driving a pair of front drive wheels (Wf1, Wf2) comprises a transmission (4) connected to an engine (2) and a front drive train (41f) connected to the drive wheels, the front drive train including a final reduction gear (43), and a second power train (T2) for driving a pair of rear drive wheels (Wr1, Wr2) comprises a rear transfer train (11) branched from the first power train, between the transmission and the front drive train, and a rear drive train (41r) connected to the rear drive wheels.

Abstract: Drive torque input to a rotatable differential case (3) is differentially distributed, through a pinion gear (25) rotatably supported by the different al case, to a pair of torque outputting side gears (27, 29) accommodated in the differential case and meshing at their toothed portions (27b, 29b) with the pinion gear, and a pair of difference limiting clutches (35, 37) for frictionally slippingly coupling the differential case with the pair of side gears each comprise a frictional region (7b, 5b) of a cone frustum figure on an inner wall (7a, 5a) of the differential case, a frictional region (27d, 29d) of a cone frustum figure on an outer wall (27c, 29c) of a body portion (27a, 29a) of either side gear, and a taper ring (47) rotatably interposed between the frictional regions which have different average friction radii (r1, r2) generating different average frictional forces.

Abstract: A shaft hole 69 in a cast rotor main body 67 has a hollow space 75 and an opening 79 in a tooth trace 73 formed by using a core. A hollow screw rotor 35 is formed by fixing a rotor shaft 47 in this shaft hole 69. A straight portion 81 to be chucked at the time of machining is formed at the inner peripheral side of the opening 79.