Power transmission device
A power transmission device includes a motor, a gear mechanism connected downstream of the motor; and a pump that sucks oil through a pump inlet. A shortest distance between an open end of the pump inlet and a surface of a stator of the motor is shorter than a shortest distance between the open end of the pump inlet and a surface of the gear mechanism.
1. A power transmission device, comprising:
a motor;
a gear mechanism connected downstream of the motor;
a strainer including a main body portion and a strainer inlet connected to the main body portion; and
a pump that sucks oil through the strainer inlet, wherein
the main body portion is offset with respect to the motor when viewed from a radial direction, the main body portion is disposed on a gear mechanism side and a shortest distance between an open end of the strainer inlet and a surface of a stator of the motor is shorter than a shortest distance between the open end of the strainer inlet and a surface of the gear mechanism.
2. The power transmission device according to claim 1 , further comprising:
an accommodation chamber that accommodates at least a part of the stator, wherein
oil discharged through an outlet of the accommodation chamber is introduced into the strainer inlet.
3. The power transmission device according to claim 2 , wherein
the strainer inlet opens toward an outlet side.
4. The power transmission device according to claim 2 , wherein
the accommodation chamber is separated from a rotor of the motor.
5. The power transmission device according to claim 2 , wherein
the accommodation chamber has a shape that encloses a coil end of the stator of the motor.
6. The power transmission device according to claim 5 , wherein
the accommodation chamber has a shape including an arcuate portion that encloses the coil end of the stator of the motor.
7. The power transmission device according to claim 2 , wherein
the outlet opens downward.
8. The power transmission device according to claim 1 , wherein
the strainer inlet is constituted as a suction port of the strainer.
9. The power transmission device according to claim 1 , further comprising:
a drive shaft connected downstream of the gear mechanism and disposed passing through an inner periphery of the motor.
10. The power transmission device according to claim 1 , wherein
the gear mechanism includes a planetary reduction gear.
11. The power transmission device according to claim 1 , wherein
the main body portion overlaps the gear mechanism when viewed from the radial direction.
12. The power transmission device according to claim 1 , wherein
the main body portion is offset with respect to the gear mechanism when viewed from the radial direction.
13. A power transmission device, comprising:
a box having a motor chamber accommodating a motor;
a gear mechanism connected downstream of the motor;
a strainer including a main body portion and a pump inlet connected to the main body portion; and
a pump that sucks oil through the pump inlet; and
an accommodation chamber that is provided inside the motor chamber and accommodates at least a part of a stator, wherein
the main body portion is offset with respect to the motor when viewed from a radial direction, the main body portion is disposed on a gear mechanism side and oil discharged through an outlet of the accommodation chamber is introduced into the pump inlet.
14. The power transmission device according to claim 13 , wherein
the pump inlet opens toward an outlet side.
15. The power transmission device according to claim 13 , wherein
the accommodation chamber is separated from a rotor of the motor.
16. The power transmission device according to claim 13 , wherein
the accommodation chamber has a shape that encloses a coil end of the stator of the motor.
17. The power transmission device according to claim 16 , wherein
the accommodation chamber has a shape including an arcuate portion that encloses the coil end of the stator of the motor.
18. The power transmission device according to claim 13 , wherein
the outlet opens downward.
19. The power transmission device according to claim 13 , wherein
the pump inlet is constituted as a suction port of the strainer.
20. The power transmission device according to claim 13 , further comprising:
a drive shaft connected downstream of the gear mechanism and disposed passing through an inner periphery of the motor.
21. The power transmission device according to claim 13 , wherein
the gear mechanism includes a planetary reduction gear.
22. The power transmission device according to claim 13 , wherein
the main body portion overlaps the gear mechanism when viewed from the radial direction.
23. The power transmission device according to claim 13 , wherein
the main body portion is offset with respect to the gear mechanism when viewed from the radial direction.
24. A power transmission device, comprising:
a motor;
a gear mechanism connected downstream of the motor;
a strainer including a main body portion and a pump inlet connected to the main body portion, wherein the pump inlet opens toward an outlet side;
a pump that sucks oil through the pump inlet, wherein the main body portion is offset with respect to the motor when viewed from a radial direction, the main body portion is disposed on a gear mechanism side and a shortest distance between an open end of the pump inlet and a surface of a stator of the motor is shorter than a shortest distance between the open end of the pump inlet and a surface of the gear mechanism; and
an accommodation chamber that accommodates at least a part of the stator, wherein oil discharged through an outlet of the accommodation chamber is introduced into the pump inlet.
25. A power transmission device, comprising:
a motor;
a gear mechanism connected downstream of the motor;
a strainer including a main body portion and a pump inlet connected to the main body portion;
a pump that sucks oil through the pump inlet, wherein the main body portion is offset with respect to the motor when viewed from a radial direction, the main body portion is disposed on a gear mechanism side and a shortest distance between an open end of the pump inlet and a surface of a stator of the motor is shorter than a shortest distance between the open end of the pump inlet and a surface of the gear mechanism; and
an accommodation chamber that accommodates at least a part of the stator, wherein oil discharged through an outlet of the accommodation chamber is introduced into the pump inlet, wherein the outlet opens downward.