Cooling system for electric motor of vehicle
First Claim
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1. A cooling system for an electric motor of a vehicle, comprising:
- an electric motor which drives a vehicle;
a reduction gear which adjusts a driving force of an output shaft of the electric motor and transmits the driving force to a drive shaft;
an in-shaft refrigerant passage provided in a shaft of the reduction gear and the output shaft of the electric motor;
a rotation detector chamber which houses a rotation detector for detecting rotations of the output shaft of the electric motor, the rotation detector chamber being provided on an end portion of the output shaft of the electric motor separately from a motor case; and
an outside refrigerant passage which allows an inside of the rotation detector chamber and a refrigerant feedback passage in a reduction gear case housing the reduction gear to communicate with each other outside the motor case,wherein a refrigerant which has passed through the in-shaft refrigerant passage is collected outside a motor case housing the electric motor, and is circulated, andthe refrigerant is allowed to flow into the rotation detector chamber and is circulated to the refrigerant feedback passage through the outside refrigerant passage.
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Abstract
A cooling system for an electric motor of a vehicle comprises an electric motor which drives the vehicle, a reduction gear which adjusts a driving force of an output shaft of the electric motor and transmits the driving force to a drive shaft, and an in-shaft refrigerant passage provided in a shaft of the reduction gear and the output shaft of the electric motor. In the cooling system, a refrigerant which has passed through the in-shaft refrigerant passage is collected outside a motor case housing the electric motor, and is circulated.
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Citations
20 Claims
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1. A cooling system for an electric motor of a vehicle, comprising:
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an electric motor which drives a vehicle; a reduction gear which adjusts a driving force of an output shaft of the electric motor and transmits the driving force to a drive shaft; an in-shaft refrigerant passage provided in a shaft of the reduction gear and the output shaft of the electric motor; a rotation detector chamber which houses a rotation detector for detecting rotations of the output shaft of the electric motor, the rotation detector chamber being provided on an end portion of the output shaft of the electric motor separately from a motor case; and an outside refrigerant passage which allows an inside of the rotation detector chamber and a refrigerant feedback passage in a reduction gear case housing the reduction gear to communicate with each other outside the motor case, wherein a refrigerant which has passed through the in-shaft refrigerant passage is collected outside a motor case housing the electric motor, and is circulated, and the refrigerant is allowed to flow into the rotation detector chamber and is circulated to the refrigerant feedback passage through the outside refrigerant passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A cooling system for an electric motor of a vehicle, comprising:
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an electric motor which drives the vehicle; a motor case housing the electric motor; a reduction gear which adjusts a driving force of an output shaft of the electric motor and transmits the driving force to a drive shaft; an in-shaft refrigerant passage provided in a shaft of the reduction gear and the output shaft of the electric motor; a rotation detector chamber which houses a rotation detector for detecting rotations of the output shaft of the electric motor, the rotation detector chamber being provided on an end portion of the output shaft of the electric motor separately from the motor case; and an outside refrigerant passage which allows an inside of the rotation detector chamber and a refrigerant feedback passage in a reduction gear case housing the reduction gear to communicate with each other outside the motor case, wherein an inside of the motor case is separated from the in-shaft refrigerant passage, and a refrigerant which has passed through the in-shaft refrigerant passage does not enter the motor case, and the refrigerant is allowed to flow into the rotation detector chamber and is circulated to the refrigerant feedback passage through the outside refrigerant passage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification