Motor unit and motor unit manufacturing method

Patent metadata

Field	Value
Publication number	US-11239735-B2
Application number	US-202016813927-A
Country	US
Kind code	B2
Filing date	Mar 10, 2020
Priority date	Mar 12, 2019
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A motor unit includes: a first rotating electric machine which includes a cylindrical first stator, a first rotor disposed coaxially with the first stator, a first shaft disposed coaxially with the first rotor, and a cylindrical first casing accommodating the first stator and the first rotor; a second rotating electric machine which includes a cylindrical second stator, a second rotor disposed coaxially with the second stator, a second shaft disposed coaxially with the second rotor, and a cylindrical second casing accommodating the second stator and the second rotor; a single drive device which is integrally fixed across a peripheral surface in a diameter direction of the first rotor in the first casing and a peripheral surface in a diameter direction of the second rotor in the second casing; and a surface-matching fixing portion which is fixed by a fixing member while an axial end surface of the first casing comes into contact with an axial end surface of the second casing.

First claim

What is claimed is:

1. A motor unit comprising:
a first rotating electric machine which includes a cylindrical first stator, a first rotor disposed coaxially with the first stator, a first shaft disposed coaxially with the first rotor, and a cylindrical first casing accommodating the first stator and the first rotor;
a second rotating electric machine which includes a cylindrical second stator, a second rotor disposed coaxially with the second stator, a second shaft disposed coaxially with the second rotor, and a cylindrical second casing accommodating the second stator and the second rotor;
a single drive device which is integrally fixed across a peripheral surface in a diameter direction of the first rotor in the first casing and a peripheral surface in a diameter direction of the second rotor in the second casing; and
a surface-matching fixing portion which is fixed by a fixing member while an axial end surface of the first casing comes into contact with an axial end surface of the second casing,
wherein the surface-matching fixing portion is fixed in an axial direction,
wherein a portion facing the drive device in the peripheral surface of the first casing and the peripheral surface of the second casing has a planar flat portion extending in the axial direction, and
wherein the motor unit further comprises an orthogonal fixing portion which fixes the drive device in a direction orthogonal to the axial direction across the peripheral surface of the first casing and the peripheral surface of the second casing.

2. The motor unit according to claim 1 ,
wherein the surface-matching fixing portion includes a first flange which protrudes outward in the diameter direction from an axial end surface of the first casing and a second flange which protrudes outward in the diameter direction from an axial end surface of the second casing, and
wherein the first flange and the second flange are fastened by a bolt serving as the fixing member while both flanges come into contact with each other.

3. The motor unit according to claim 1 ,
wherein the first rotating electric machine and the second rotating electric machine are disposed coaxially, and
wherein a plurality of the fixing members are arranged at intervals in a circumferential direction of the first rotating electric machine.

4. The motor unit according to claim 3 ,
wherein the drive device covers at least a part of the plurality of fixing members while the drive device is fixed.

5. A motor unit manufacturing method comprising:
a first step of preparing a first rotating electric machine which includes a cylindrical first stator, a first rotor disposed coaxially with the first stator, a first shaft disposed coaxially with the first rotor, and a cylindrical first casing accommodating the first stator and the first rotor, a second rotating electric machine which includes a cylindrical second stator, a second rotor disposed coaxially with the second stator, a second shaft disposed coaxially with the second rotor, and a cylindrical second casing accommodating the second stator and the second rotor, a single drive device which has a size across a peripheral surface in a diameter direction of the first rotor in the first casing and a peripheral surface in a diameter direction of the second rotor in the second casing, and a surface-matching fixing portion which is fixed by a fixing member while an axial end surface of the first casing comes into contact with an axial end surface of the second casing, and fixing the surface-matching fixing portion by the fixing member; and
a second step of fixing the drive device across the peripheral surface of the first casing and the peripheral surface of the second casing after the first step,
wherein the surface-matching fixing portion is fixed in an axial direction,
wherein a portion facing the drive device in the peripheral surface of the first casing and the peripheral surface of the second casing has a planar flat portion extending in the axial direction, and
wherein the motor unit manufacturing method further comprises fixing, using an orthogonal fixing portion, the drive device in a direction orthogonal to the axial direction across the peripheral surface of the first casing and the peripheral surface of the second casing.

Assignees

• Honda Motor Co Ltd
• Hitachi Automotive Systems Ltd

Inventors

• Yazaki Manabu
• Suzuki Tomoyuki
• KAWADA Sachio
• Saito Yasuyuki
• Hamano Hiroshi
• Harada Tsuyoshi

Classifications

• H02K5/203

  specially adapted for liquids, e.g. cooling jackets · CPC title

• H02K16/00 Primary

  Machines with more than one rotor or stator {(machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029)} · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• H02K7/10

  Structural association with clutches, brakes, gears, pulleys or mechanical starters · CPC title

• H02K15/00

  Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines · CPC title