Abstract:
The present invention relates to a differential gear equipped with a selectively controllable locking device. Said locking device is self energizing, i.e. it utilizes the differentiation energy (i.e. the possible torque imbalance) to self- lock on its own accord. The control signal is therefore not needed to lock the locking device but rather to selectively control it not to lock itself. Said control signal is designed to, separately for each of the two possible differentiation directions, allow or not allow the locking device to lock. In this way the differential gear will get four different working modes. Said working modes are respectively; open regardless of differentiation direction; open in one differentiation direction but self-locking in the other direction; open in the other direction but self-locking in the first one; self-locking regardless of differentiation direction. A control unit is supplied with sensor data of the present "driving situation". Said control unit has a steering strategy. With the right steering strategy it can regulate the control signal so as to admit the differential gear to equalize the torque at each output shaft for as long as possible but still to practically eliminate the risk of one wheel spin.
Abstract:
A limited slip differential (10) with a hydrostatic pump (96). A pair of pressure plates splined to the carrier define a pair of opposed ramps. They are engaged by differential pinions carried by a pinion shaft. The pinions engage each of the two side gears. A friction clutch assembly is situated adjacent each side gear. The pressure plates transfer an axial component of the thrust force created on the ramp surfaces as torque is transmitted through the pinions and through each side gear of each of two axle shafts. Each friction clutch assembly includes friction disks carried by the side gears and by the carrier so that a bias torque is established as one axle shaft overspeeds the other. A hydrostatic pump (96) has one pump member connected to the carrier and another connected to one of the axle shafts. The hydrostatic pump (96) creates a differential speed-sensitive bias which complements the torque-sensitive bias developed by the ramps.
Abstract:
Verfahren zur Steuerung einer Differentialanordnung, die einen um eine Drehachse (A) drehbar gelagerten drehend antreibbaren Differentialkorb (15), zwei koaxial zur Drehachse (A) im Differentialkorb (15) gelagerte Seitenwellenräder (19, 20) sowie um Drehachsen im Differentialkorb (15) drehbar gelagerte Ausgleichsräder (23, 24), die mit den Seitenwellenrädern (19, 20) im Eingriff sind, umfaßt, wobei in die Ausgleichsräder (23, 24) bei umlaufendem Differentialkorb (15) äußere Drehmomente eingeleitet werden.
Abstract:
Die Erfindung betrifft einen Differentialkorb (11) für ein Differentialgetriebe, der um seine Längsachse A drehend antreibbar zu lagern ist, mit Seitenwellenrädern (18, 19), die im Differentialkorb (11) koaxial zur Längsachse A drehbar gelagert sind, mit Ausgleichsrädern (20, 21), die im Differentialkorb (11) auf radial zur Längsachse A liegenden Drehachsen R gelagert sind und mit den Seitenwellenrädern (18, 19) im Verzahnungseingriff sind, sowie mit einer koaxial zur Längsachse A im Differentialkorb (11) angeordneten Lamellenkupplung (41), die zwischen einem ersten der Seitenwellenräder (19) einerseits und dem Differentialkorb (11) oder dem zweiten der Seitenwellenräder (18) andererseits wirksam angeordnet ist. Der Differentialkorb (11) weist einen Flansch (16) auf, an den ein Tellerrad anschraubbar ist, wobei der Differentialkorb (11) aus einem topfförmigen Teil (14), das einen Boden (22) umfasst und an dem der Flansch (16) einstückig angeformt ist, und einem in das topfförmige Teil (14) eingesetzten Dekkel (15) gebildet wird, der durch ein ringförmiges Sicherungselement (17) axial fixiert ist. Die Lamellenkupplung (41) und der Deckel (15) liegen in Bezug auf eine Ebene durch die Drehachsen R der Ausgleichsräder (20, 21) auf der zum Flansch (16) und zum Boden (22) entgegengesetzten Seite im Differentialkorb (11).
Abstract:
A differential having a driving member; an input member; first and second rotatable output members; differential gearing operable between the input member and the first and second output members, for transmitting rotation from the input member to the first and second output members and providing for differential rotation of the first and second output members relative to one another; an engaging device operable to establish a driving connection between the driving member and the input member; an inhibiting device operable to inhibit relative rotation between the first and second output members; and an actuating device for causing the operation of the engaging device and the inhibiting device.
Abstract:
PROBLEM TO BE SOLVED: To provide an auxiliary drive unit for converting a two-wheel vehicle temporarily into a four-wheel drive vehicle, while prohibiting differential action of a differential gear on the auxiliary drive unit to solve problems related to an uneven traction surface. SOLUTION: This differential gear includes: a drive member 12; an input member 18; a first and a second rotatable output members 42 and 46; and differential gear means 30 and 32 that is actuated between the input member 18 and the first and the second output members 42 and 46 to transmit rotation from the input member 18 to the first and the second output members 42 and 46, and relatively feed actuation rotation of the first and the second output members 42 and 46. It is also provided with: an engagement means 60 that is actuated to establish drive connection between the drive member 12 and the input member 18; a prohibiting means 54 that is actuated to prohibit relative rotation between the first and the second output members 42 and 46, and an actuation means 75 to generate actuation of the engagement means 60 and the prohibiting means 54. COPYRIGHT: (C)2004,JPO
Abstract:
Pinion gears (4A, 4B) are rotatably supported in pinion gear insertion holes (12A, 12B) formed in a differential gear case (2). Extension sections (12Aa, 12Ba) made by expanding the inner surfaces (pinion gear support surfaces) of the insertion holes (12A, 12B) are formed so that not only to-be-supported sections (4Ab, 4Bb) outside the pinion gears (4A, 4B) but also portions of gear mesh sections (4Aa, 4Ba) meshing with side gears (6A, 6B) on the inner side support the pinion gears in an overlapping manner. The structure prevents the pinion gears (4A, 4B) from inclining and improves durability.
Abstract:
A differential gear mechanism, of either the locking or limited slip type, including a gear case (11) rotatably disposed within an outer housing (H) and means (37) to limit rotation of side gears (23,25) relative to the gear case (11), this means (37) including a member (41) which is axially moveable between a first position (FIG. 2) and a second position (FIG. 5). The mechanism includes a sensor assembly (95) and a sensor element (97) disposed adjacent the gear case (11). The axially moveable member (41) includes a sensed portion (89) surrounding an annular outer surface (11S) of the gear case, and disposed between the annular outer surface (11S) and the sensor element (97). Movement of the sensed portion (89) corresponding to changes within the mechanism between, for example, the unlocked and locked conditions, results in the sensor assembly (95) transmitting either a first or second electrical output. Thus, the present invention permits the vehicle control logic to know the condition of the differential mechanism and control certain other parts or functions of the vehicle accordingly.
Abstract:
Pinion gears 4A and 4B are rotatably carried within pinion gear receiving openings 12A and 12B formed in a differential case 2. The inner surfaces (pinion gear holding surfaces) of the receiving openings 12A and 12B are enlarged inwardly to form extensions 12Aa and 12Ba to hold not only portions 4Ab and 4Bb of the pinion gears 4A and 4B which are located outwardly and which are to be held, but also part of inner meshing portions 4Aa and 4Ba of the pinion gears which are disposed in meshing engagement with the side gears 6A and 6B in an overlapping manner. This construction prevents a tilting of the pinion gears 4A and 4B and improves the durability.
Abstract:
A differential gear assembly (1) comprises: a disc-shaped input gear (2) receiving drive force and having a central portion (9), an outer portion around the central portion, and one or more open space portions (2a,2b,2c), formed between the central portion and the outer portion; a pair of output shafts (3,3') extending in opposite directions along the axis of the input gear (2) and one end of each of the output shafts being loosely fitted in a central bore (9A) formed in the central portion of the input gear; a pair of side bevel gears (4,4') each of which is fixedly attached near the end of each output shaft (3,3') closer to the input gear; one or more support shafts (9B,9B') extending radially from the central portion into the open space portions of the input gear; one or more bevel pinions (5,5') rotatably supported on the one or more support shafts, respectively, to mesh with the pair of side bevel gears; and friction mechanism (6,6',7,7',8,8') located in at least one of said one or more open space portions that permits the bevel pinion to rotate with rotational resistance. A limited slip effect is provided without using a casing-shaped ring gear, whereby the resulting assembly can be compact and less costly.