Claims
- 1. A driving torque transmitting device for transmitting driving torque from a driving torque supply to two output shafts connected to wheels, comprising:
- an input shaft rotatably supported on a housing to be rotated by said driving torque supply and provided with an input gear at its one end;
- a cylindrical case body supported within said housing so as to be rotatable about a rotational axis perpendicular to the rotational axis of said input shaft and provided on its outer periphery with a ring gear meshing said input gear each other so as to be rotated;
- two output shafts arranged to be rotatable about an axis coinciding with said rotational axis of said cylindrical case body, each end of said two output shafts penetrating end walls of said case body;
- two first engaging members each provided on an outer surface of said ends of said output shafts so as to be rotatable with and axially slidable relative to said output shafts;
- two second engaging members provided within said case body in contact with each of said first engaging members;
- two piston members each provided on an outer surface of said ends of said output shafts in contact with respective first engaging members so as to form two closed actuating chambers charged with viscous fluid together with two radially extending walls formed integrally with said case body; said piston members being rotatable with and axially slidable relative to said case body; and
- two blade members each being rotatable bodily with each of said output shafts and disposed within each of said closed actuating chambers in relative slidable contact relation with said piston members, each of said blade members having an axial width which is narrower in an axial direction than said closed actuating chambers so that upon rotation of each of said blade members respectively with said closed actuating chambers, a high pressure is generated due to said viscous fluid being compulsorily moved between two respective surfaces defining respectively said closed actuating chambers, so as to axially respectively move said piston members respectively toward said first engaging members and so as to tightly respectively engage the same with said second engaging members for torque transmission between respective output shafts and said case body, wherein each of said blade members includes at least two radially extending blade portions which are formed to provide a circumferential space section between every two blade portions of said at least two radially extending blade portions so as that a large volume of said viscous fluid is filled within said circumferential space sections.
- 2. The driving torque transmitting device as set forth in claim 1, wherein a length dimension of said circumferential space section in its circumferential direction is greater than that of said at least two radially extending blade portions.
- 3. A driving torque transmitting device according to claim 1, wherein said two second engaging members comprise a first pair of bevel gears disposed around a pinion shaft extending between opposed portions of a cylindrical wall of said differential case: said two first engaging members comprise a second pair of bevel gears provided around said two output shafts respectively so as to be meshed with said first pair of bevel gears, said radially extending wall comprises each of the end walls of said differential case, said two piston members are disposed between said respective second pair of bevel gears and said respective end walls, to form said closed actuating chambers with said end walls, wherein when each of said two output shafts rotate relative to said differential case, said two piston members axially move due to high pressure generated in said closed actuating chambers to tightly engage said second pair of bevel gears with said first pair of bevel gears and to restrain relative rotations of said respective two output shafts and said differential case.
- 4. A driving torque transmitting device according to claim 1, wherein each of said two second engaging members is composed of at least one ring-shaped outer plate connected to an inner wall of said differential case at its outer periphery, each of said two first engaging members comprise at least one ring-shaped inner plate connected to an outer surface of each of said two output shafts at its inner periphery in contact with said at least one outer plate, said radially extending wall comprises a partition wall dividing a cavity of said differential case at its axially intermediate position, and wherein each of said two piston members is disposed between an innermost one of said at least one inner plate and at least one outer plate and said partition wall to form said closed actuating chamber with said partition wall, wherein when each of said two output shafts rotates relative to said differential case, each of said two piston members axially moves due to high pressure generated in said closed actuating chamber to tightly engage said at least one inner plate with said at least one outer plate and restrain relative rotation of each of said two output shafts and said differential case.
- 5. A driving torque transmitting device according to claim 4, wherein said at least one inner plate is composed of a plurality of inner plates and said at leas one outer plate is composed of a plurality of outer plates, said plurality of inner plates and said plurality of outer plates are alternately disposed, and the outer periphery of each of said plurality of outer plates is connected to said inner wall of said differential case so as to be axially movable relative to said differential case.
Priority Claims (2)
Number |
Date |
Country |
Kind |
62-193908 |
Aug 1987 |
JPX |
|
62-205550 |
Aug 1987 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 227,806, filed on Aug. 3, 1988, now abandoned.
US Referenced Citations (18)
Foreign Referenced Citations (7)
Number |
Date |
Country |
0202951 |
Nov 1986 |
EPX |
0236650 |
Sep 1987 |
EPX |
3545540 |
Jul 1987 |
DEX |
3706075 |
Aug 1987 |
DEX |
176117 |
Nov 1949 |
JPX |
2163107 |
Feb 1986 |
GBX |
2171967 |
Sep 1986 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan unexamined application Kokai-No. 60-252 026; vol. 10, No. 122, May 7, 1986. |
Continuations (1)
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Number |
Date |
Country |
Parent |
227806 |
Aug 1988 |
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