Motor unit and motor unit manufacturing method
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.
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.