Power transmission device
AssigneesJATCO Ltd, Nissan Motor Co., Ltd.
InventorsKenjiro Yasui, Yusuke Suzuki, Takayoshi Urushibata
Life of this patent
Estimating the term…
Abstract
A power transmission device includes a motor, a gear mechanism connected downstream of the motor and lubricated by oil, and a box. The box has a wall part that covers an outer circumference of the gear mechanism, and a jacket part that covers an outer circumference of the wall part. A cooling chamber, in which cooling liquid is introduced, is formed between the wall part and the jacket part. The cooling chamber includes a portion that overlaps with the gear mechanism when seen from a radial direction, and a portion that overlaps the gear mechanism when seen from an axial direction.
Claims10
A power transmission device comprising:
- a motor;
- a gear mechanism connected downstream of the motor, the gear mechanism being lubricated by oil;
- and
- a box having
- a wall part that covers an outer circumference of the gear mechanism, and
- a jacket part that covers an outer circumference of the wall part,
- a cooling chamber, in which cooling liquid is introduced, being formed between the wall part and the jacket part, wherein
- the cooling chamber includes a portion that overlaps with the gear mechanism when seen from a radial direction, and a portion that overlaps the gear mechanism when seen from an axial direction.
The power transmission device comprising:
- a motor;
- a gear mechanism that is connected downstream of the motor, the gear mechanism being lubricated by oil;
- a plate;
- and
- a box having
- a wall part that covers an outer circumference of the gear mechanism, and
- a jacket part that covers an outer circumference of the wall part,
- a cooling chamber, in which cooling liquid is introduced, being formed between the wall part and the jacket part,
- a housing unit, in which the oil and the gear mechanism are housed, being formed on an inner circumference of the wall part, wherein
- the plate divides the housing unit into a first space in which the gear mechanism is arranged, and a second space in which the gear mechanism is not arranged, and
- when seen from a radial direction, the cooling chamber has a portion that overlaps the second space.
The power transmission device comprising:
- a motor;
- a gear mechanism that is connected downstream of the motor, the gear mechanism being is lubricated by oil;
- and
- a box having
- a wall part that covers an outer circumference of the gear mechanism, and
- a jacket part that covers an outer circumference of the wall part,
- between the wall part and the jacket part, a cooling chamber being formed in which cooling liquid is introduced via an introduction port, and the cooling liquid is discharged via a discharge port, wherein
- in an interior of the cooling chamber, a spacer is provided that projects in an axial direction away from the introduction port, and a tip of an axial direction side of the spacer faces a wall of the axial direction side in the interior of the cooling chamber with a gap open, and
- when seen from the axial direction, the introduction port and the discharge port are arranged to sandwich the spacer in a circumferential direction.
Dependencies are inferred from the claim text.