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 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: 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: 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: A differential apparatus (7) comprises: a differential casting (21) rotated by an engine power; a plurality of pinion gears (65, 66) slidably housed in accommodation holes (63, 64) formed in the differential casing; a pair of side gears (35, 37) geared with each other via the pinion gears, two opposing end surfaces thereof being slid relative to each other, either directly or via a thrust washer (61); and a block member (47, 91, 97) interposed between two inner circumferential surfaces of the two side gears so as to center the side gears, respectively. In particular, at least one oil sump (77,) is formed between the block member and the side gears, to supply lubricant to sliding portions between the bolck member (47, 91, 97) and the side gears (35, 37) and between two opposing end surfaces of the two side gears, by a centrifugal force generated by the rotating differential casing.

Abstract: A differential apparatus includes a differential casing, a pair of output side gears disposed in the differential casing, a differential mechanism distributing driving force of an engine, a clutch for operatively connecting the differential casing with the axles of the vehicle, an actuator for releasing the clutch from its connecting operation, and an urging member for causing the clutch to connect the differential casing with the axles of the vehicle. When the actuator is inactivated, the urging member serves to attain the connecting operation of the clutch. Therefore, even if the actuator is in a bad condition, four-wheel driving condition of the vehicle can be maintained. Therefore, the differential apparatus allows the vehicle to escape from a bad road.

Abstract: A fastening structure has a screw rotor fixing a rotor shaft to a shaft hole of a rotor body. A casing includes the rotor therein, and a positioning portion and a screw portion are arranged between the shaft hole and the rotor shaft. Press fit portions are arranged at both axial ends of the shaft hole. The screw portion receives driving torque inputted to the rotor shaft and moves the rotor body so that the shaft hole and the rotor shaft hit against each other in the positioning portion. Accordingly, a fixing function of the rotor body and the rotor shaft is strengthened as the input torque to the rotor is increased. Further, the rotor has a simple structure and is cheaply manufactured. Furthermore, it is possible to prevent reductions in performance and durability of the rotor caused by any shift in position between the rotor body and the rotor shaft.

Abstract: A differential apparatus comprises: a differential gear (1) rotatably housed in a left end within a carrier case (3); a speed increasing mechanism and reducing mechanism (31) housed within the carrier case (3) in such a manner as to be adjacent to the rear differential apparatus (1), having a speed increasing mechanism (37) for increasing a rotational speed and a speed reducing mechanism (39) for reducing the rotational speed of the input gear (33) connected to a differential case (11) in a parallel manner; a speed increasing and reducing clutches (53) mounted to the carrier case (3) and for connecting and disconnecting the rotation from the input gear (33) which are arranged in a plane crossing to axes of output shafts (21,23) in parallel.

Abstract: A differential apparatus (7) comprises: a differential casing (21) rotated by an engine power; a plurality of pinion gears (65, 66) slidably housed in accommodation holes (63, 64) formed in the differential casing: a pair of side gears (35, 37) geared with each other via the pinion gears, two opposing end surfaces thereof being slid relative each other, either directly or via a thrust washer (61); and a block member (47, 91, 97) interposed between two inner circumferential surfaces of the two side gears so as to center the side gears, respectively. In particular, at least one oil sump (77, 79; 95; 101) is formed between the block member and the side gears, to supply lubricant to sliding portions between the block member (47, 91, 97) and the side gears (35, 37) and between two opposing end surfaces of the two side gears, by a centrifugal force generated by the rotating differential casing.

Abstract: A differential apparatus for a part-time four-wheel drive vehicle is provided. The differential apparatus includes an outer differential casing, an inner differential casing, a clutch member adjacent to the inner differential casing, a pair of dog clutches, a differential gear system arranged in the inner differential casing and an actuator body for actuating the clutch member. One of the dog clutches is connected with the inner differential casing, while the other of the dog clutches is formed on the clutch member. When the vehicle is traveling under two-wheel drive, the inner differential casing and the differential gear system are raced, while the outer differential casing and the clutch member do not race. Accordingly, it is possible to reduce the racing loss of these members and the noise caused by the racing loss.

Abstract: A transmission for an auxiliary device arranged for transmitting a driving force of an engine to an auxiliary device has a planetary-gear-type speed increasing mechanism having a first gear driven by the engine through an input shaft, a second gear connected to the auxiliary device and a third gear for locking. It is further provided with a friction clutch for connecting the third gear to a stationary member, a hydraulic actuator for pressing the friction clutch and an oil pump for feeding an oil pressure to the hydraulic actuator. A damper is disposed between the stationary member and the friction clutch.

Abstract: A differential apparatus includes a differential casing, a pair of side gears and plural pairs of pinion gears. The pinion gears are accommodated in bores formed in the differential casing, respectively. Each pinion gear has an outer diameter smaller than that of a standard gear to be determined corresponding to predetermined gear specifications. With such a forming of the pinion gears, the tip circular thickness of each pinion gear is increased, so that surface pressure at respective tips of the pinion gears is reduced to improve the seizure resistant capability.

Abstract: A differential gear transmitting force from an engine to a pair of wheels, includes a differential gear case receiving driving force of an engine and rotatably driven having a casing body and an end cover, a pair of side gears connected with the wheels respectively, pinion gears having a first gear portion meshed with the side gear and a second gear portion meshed with other pinion gear outside in the axial direction of the side gears, housing holes receiving each pinion gear slidably and rotatably and supporting a whole periphery of the second gear portion of the pinion gear except for a meshing portion meshed with other pinion gear, and a plate member fixed to the casing body and being able to bear the thrust force of the pinion gear.

Abstract: A differential apparatus comprises: a casing (1) rotated by an external power; a first shaft (9) rotatably supported by the casing: a second shaft (11) rotatably supported by the casing; a first side gear (17) formed integral with the first shaft: a second side gear (19) formed integral with the second shaft; and a helical pinion gear assembly (29. 31) geared between the first and second side gears within the casing filled with a viscous fluid. Therefore, a differential limiting force can be generated by gearing between the helical pinion gear assembly and tire first and second side gears, when the viscous fluid is pressurized and circulated within the casing by a gear pumping action of the helical pinion gear assembly caused by differential motion between the first and second side gears, even if the torque applied to one of the side gears is zero (as when one tire is floated perfectly from a road surface).

Abstract: A differential apparatus includes a differential casing, a pair of output side gears, a pair of output shafts connected to the output side gears, four pairs of long and short accommodating bores formed in the differential casing and long and short pinion gears accommodated in the accommodating bores. In arrangement, these pairs of accommodating bores are divided equally in the circumferential direction of the differential casing. The output shafts are prevented from slipping out of the differential casing by C-shaped clips. These accommodating bores are arranged so that, between two neighboring pairs of accommodating bores in the circumferential direction, the short accommodating bore in the one pair adjoins the short accommodating bore of the other pair. The differential casing is provided with an elongated hole which substantially bridges the adjoining short accommodating bores.

Abstract: To enable a reliable differential lock without setting an actuator to be large-sized, a differential apparatus has a differential casing rotated by driving force of an engine, output side helical side gears supported within this differential casing, helical pinion gears connecting the gears, storage holes for storing the gears slidably and rotatably, a locked member connected to the gear, a lock member integrally rotated with the differential casing, a clutch mechanism formed between the members and locking a differential rotation, an actuator for coupling and operating the clutch mechanism, and a cam mechanism for increasing coupling force of the clutch mechanism by receiving differential torque when the clutch mechanism is coupled.

Abstract: A differential unit is disclosed which has a differential limiting function and which exhibits stable differential limiting characteristic even if the difference in the differential rotations is small. The differential unit has a differential case, pinion gears, side gears, a gear pump disposed between a left side gear and the differential case.