Rotating electric machine

Patent metadata

Field	Value
Publication number	US-10944310-B2
Application number	US-201916361559-A
Country	US
Kind code	B2
Filing date	Mar 22, 2019
Priority date	Mar 30, 2018
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

A rotating electric machine includes a case, a stator, a first rotary member including a rotor core and a first shaft, a second rotary member including a second shaft, and a multiple disc clutch. A first oil passage and a second oil passage are provided inside the case. The first oil passage starts from an inside of the first shaft or an inside of the second shaft, passes through the multiple disc clutch from an inner side to an outer side in a radial direction with respect to a rotation center, and reaches an inner side of the rotor core in the radial direction. The second oil passage starts from the inside of the first shaft or the inside of the second shaft and reaches the inner side of the rotor core in the radial direction without passing through the multiple disc clutch.

First claim

What is claimed is:

1. A rotating electric machine comprising:
a case;
a stator that is fixed to the case and includes a coil;
a first rotary member that is housed inside the case, supported by the case so as to rotate about a rotation center, and includes a rotor core and a first shaft, the rotor core facing an inner side of the stator in a radial direction with respect to the rotation center and including a permanent magnet provided such that electromagnetic force acts between the permanent magnet and the coil, and the first shaft extending along the rotation center;
a second rotary member that is housed inside the case, supported by the case so as to rotate about the rotation center, and includes a second shaft extending along the rotation center; and
a multiple disc clutch that is positioned closer to the rotation center than the rotor core is, and switches a state of the first rotary member and the second rotary member between a connected state in which the first rotary member is connected to the second rotary member, and a disconnected state in which the first rotary member is disconnected from the second rotary member, wherein:
a first oil passage and a second oil passage are provided inside the case;
the first oil passage starts from one of an inside of the first shaft and an inside of the second shaft, passes through the multiple disc clutch from an inner side of the multiple disc clutch to an outer side of the multiple disc clutch in the radial direction with respect to the rotation center, and reaches an inner side of the rotor core in the radial direction;
the second oil passage starts from an other of the inside of the first shaft and the inside of the second shaft and reaches the inner side of the rotor core in the radial direction without passing through the multiple disc clutch;
a third oil passage and a fourth oil passage are provided inside the case;
the third oil passage is an oil passage in which oil that has reached the inner side of the rotor core in the radial direction through the first oil passage flows in an axis direction of the rotation center on the inner side of the rotor core in the radial direction;
the fourth oil passage is an oil passage in which the oil that has reached the inner side of the rotor core in the radial direction through the second oil passage flows in the axis direction of the rotation center on the inner side of the rotor core in the radial direction;
a first connecting position between the first oil passage and the third oil passage, and a second connecting position between the second oil passage and the fourth oil passage are disposed on opposite sides of an intermediate position of the rotor core in the axis direction from one another; and
the third oil passage extends along the axis direction from the first connecting position to an end portion on the opposite side from the first connecting position, and the fourth oil passage extends along the axis direction from the second connecting position to an end portion on the opposite side from the second connecting position such that a flow direction of the oil inside the third oil passage and a flow direction of the oil inside the fourth oil passage are opposite to each other in the axis direction.

2. The rotating electric machine according to claim 1 , wherein:
the first rotary member includes a first wall portion that extends in the radial direction between the first shaft and the rotor core; and
the multiple disc clutch and the first oil passage are provided on an opposite side of the first wall portion from the second oil passage.

3. The rotating electric machine according to claim 2 , wherein:
the second rotary member includes a second wall portion that extends in the radial direction between the second shaft and the multiple disc clutch; and
the first rotary member includes a third wall portion that is positioned on an opposite side of the second wall portion from the first wall portion.

4. The rotating electric machine according to claim 1 , wherein:
the first oil passage starts from the inside of the first shaft and the second oil passage starts from the inside of the second shaft.

5. The rotating electric machine according to claim 1 , wherein:
the first oil passage starts from the inside of the second shaft and the second oil passage starts from the inside of the first shaft.

6. A rotating electric machine comprising:
a case;
a stator that is fixed to the case and includes a coil;
a first rotary member that is housed inside the case, supported by the case so as to rotate about a rotation center, and includes a rotor core and a first shaft, the rotor core facing an inner side of the stator in a radial direction with respect to the rotation center and including a permanent magnet provided such that electromagnetic force acts between the permanent magnet and the coil, and the first shaft extending along the rotation center;
a second rotary member that is housed inside the case, supported by the case so as to rotate about the rotation center, and includes a second shaft extending along the rotation center; and
a multiple disc clutch that is positioned closer to the rotation center than the rotor core is, and switches a state of the first rotary member and the second rotary member between a connected state in which the first rotary member is connected to the second rotary member, and a disconnected state in which the first rotary member is disconnected from the second rotary member, wherein:
a first oil passage and a second oil passage are provided inside the case;
the first oil passage starts from one of an inside of the first shaft and an inside of the second shaft, passes through the multiple disc clutch from an inner side of the multiple disc clutch to an outer side of the multiple disc clutch in the radial direction with respect to the rotation center, and reaches an inner side of the rotor core in the radial direction;
the second oil passage starts from an other of the inside of the first shaft and the inside of the second shaft and reaches the inner side of the rotor core in the radial direction without passing through the multiple disc clutch;
the first rotary member includes a first wall portion that extends in the radial direction between the first shaft and the rotor core;
the multiple disc clutch and the first oil passage are provided on an opposite side of the first wall portion from the second oil passage;
the second oil passage includes a first section that extends along an end surface of the first wall portion, the end surface being positioned on an opposite side from the multiple disc clutch and the first oil passage; and
the case includes a projecting wall portion that extends in an axis direction of the rotation center towards the end surface from an opposite side of the first wall portion from the multiple disc clutch and the first oil passage, the projecting wall portion also extending in a circumferential direction of the rotation center, and facing the end surface with a gap in the axis direction.

7. A rotating electric machine comprising:
a case;
a stator that is fixed to the case and includes a coil;
a first rotary member that is housed inside the case, supported by the case so as to rotate about a rotation center, and includes a rotor core and a first shaft, the rotor core facing an inner side of the stator in a radial direction with respect to the rotation center and including a permanent magnet provided such that electromagnetic force acts between the permanent magnet and the coil, and the first shaft extending along the rotation center;
a second rotary member that is housed inside the case, supported by the case so as to rotate about the rotation center, and includes a second shaft extending along the rotati

Assignees

• Toyota Motor Co Ltd
• Toyota Jidosha Kabushik1Kaisha

Inventors

• Ideue Shigeki
• Kato Koji
• Inda Keita
• Kamiya Toshihiko
• Okishima Tatsuya

Classifications

• H02K9/197

  in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator · CPC title

• H02K7/006 Primary

  Structural association of a motor or generator with the drive train of a motor vehicle · CPC title

• H02K7/108

  with friction clutches · CPC title

• H02K1/28

  Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures · CPC title

• H02K9/193 Primary

  with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium · CPC title