US 5,012,907 AGranted

Transmission for separately drivable right and left wheels

AssigneeKubota Corporation

InventorsHisatake Fujioka, Tokio Horikawa, Nobuhide Yanagawa

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Abstract

A transmission comprises transmission shafts connected to right and left wheels, respectively. Each transmission shaft has a side clutch and a side brake. The side clutch includes clutch balls movable radially of the transmission shaft between a clutching position engaged with a first engagement portion of the transmission shaft and a declutching position radially retracted from the transmission shaft. The side brake includes brake balls movable radially of the transmission shaft between a braking position engaged with a second engagement portion of the transmission shaft and a releasing position radially retracted from the transmission shaft. A shifter sleeve is axially movably mounted on each transmission shafts. The shifter sleeve includes a first space for accommodating the clutch balls, a second space for accommodating the brake balls, and a projection for pressing the clutch balls and brake balls. The sleeve is movable between a position in which the projection presses the clutch balls into the first engagement portion, and a position in which the projection presses the brake balls into the second engagement portion with the clutch balls accommodated in the first space.

Claims8

Dependent claims

A transmission for separately drivable right and left wheels comprising:

right and left transmission shafts connected to said right and left wheels, respectively,
ball type side clutches each having clutch balls movable radially of each of said right and left transmission shafts to transmit power to each of said right and left transmission shafts, said clutch balls being movable between a clutching position engaged with a first engagement portion of a respective transmission shaft and a declutching position radially retracted from said respective transmission shaft,
ball type side brakes each having brake balls movable radially of each of said right and left transmission shafts to brake the respective transmission shaft, said brake balls being movable between a braking position engaged with a second engagement portion of each of said right and left transmission shafts and a releasing position radially retracted from said respective transmission shaft, and
shifter sleeves axially movably mounted on each of the right and left transmission shafts, respectively, each of said shifter sleeves including a first space for accommodating said clutch balls, a second space for accommodating said brake balls, and pressing means for pressing said clutch balls and said brake balls, and movable between a first position in which said pressing means presses said clutch balls into said first engagement portion, and a second position in which said pressing means presses said brake balls into said second engagement portion with said clutch balls accommodated in said first space.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 07/506,127Filed 9 Apr 1990
Priority: JP 1-10929828 Apr 1989
Granted: 7 May 1991
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B60T 1/005
Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles: by locking of wheel or transmission rotation
B62D 11/08
By means of a single main power source: using brakes or clutches as main steering-effecting means
F16D 11/12
Actuated by moving a non-rotating part axially: with clutching members movable otherwise than only axially
F16D 15/00
Clutches with wedging balls or rollers or with other wedgeable separate clutching