Differential gear
First Claim
1. A differential gear comprising:
- a differential carrier to be mounted on a vehicle body;
a rotatable case disposed rotatably in the carrier;
pinions disposed rotatably in the case;
a pair of side gears disposed rotatably in said case to mesh with the pinions;
a first shaft supported rotatably about a rotary axis of said case and extending from one of said side gears;
a second shaft supported rotatably about said rotary axis and extending from the other side gear in the opposite direction to said first shaft;
driven means provided in one of the first and second shafts for transmitting driving force to the shafts;
first means for rotating the driven means;
a worm wheel fixed to a portion outside said case to be rotated therewith and disposed in the differential carrier;
second means for rotating the worm wheel having a worm meshing with the worm wheel and disposed in the differential carrier and an electric motor fixed to the differential carrier, a shaft of the motor being connected to the worm; and
a control device means for calculating on the basis of signals from a steering angle sensor and a vehicle speed sensor to control the number of revolutions of said second means.
1 Assignment
0 Petitions
Accused Products
Abstract
A differential gear includes a rotatable case, pinions rotatably disposed in the case, a pair of side gears meshing with the pinions and disposed in the case, a first shaft supported rotatably about a rotary axis of the case and extending from one of side gears, a second shaft supported rotatably about the axis and extending from the other side gear in the opposite direction to the first shaft, a first driven gear provided in one of the first and second shafts, a first drive gear for rotating the driven gear to transmit driving force to the first and second shafts. A worm wheel fixed to the case, a worm meshing with the worm wheel and an electric motor are provided. The motor is controlled by a control device so as to maintain the difference between numbers of revolutions of the first and second shafts within a predetermined range.
11 Citations
8 Claims
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1. A differential gear comprising:
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a differential carrier to be mounted on a vehicle body; a rotatable case disposed rotatably in the carrier; pinions disposed rotatably in the case; a pair of side gears disposed rotatably in said case to mesh with the pinions; a first shaft supported rotatably about a rotary axis of said case and extending from one of said side gears; a second shaft supported rotatably about said rotary axis and extending from the other side gear in the opposite direction to said first shaft; driven means provided in one of the first and second shafts for transmitting driving force to the shafts; first means for rotating the driven means; a worm wheel fixed to a portion outside said case to be rotated therewith and disposed in the differential carrier; second means for rotating the worm wheel having a worm meshing with the worm wheel and disposed in the differential carrier and an electric motor fixed to the differential carrier, a shaft of the motor being connected to the worm; and a control device means for calculating on the basis of signals from a steering angle sensor and a vehicle speed sensor to control the number of revolutions of said second means. - View Dependent Claims (2, 3, 4, 5)
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6. A differential gear comprising:
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a differential carrier to be mounted on a vehicle body; a rotatable case disposed rotatably in the carrier; pinions disposed rotatably in the case; a pair of side gears disposed rotatably in said case to mesh with the pinions; a first shaft supported rotatably about a rotary axis of said case and extending from one of said side gears; a second shaft supported rotatably about said rotary axis and extending from the other side gear in the opposite direction to said first shaft; driven means for transmitting driving force to the first and second shafts; first means for rotating the driven means; a worm wheel provided on one of said case and the first and second shafts; second means for rotating the worm wheel having a worm meshing with the worm wheel and disposed in the differential carrier, a shaft of the motor being connected to the worm; and a control device means for calculating on the basis of signals from a steering angle sensor and a vehicle speed sensor to control the number of revolutions of said second means. - View Dependent Claims (7, 8)
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Specification