Motor with stator fixing structure

Patent metadata

Field	Value
Publication number	US-10177612-B2
Application number	US-201114234512-A
Country	US
Kind code	B2
Filing date	Oct 6, 2011
Priority date	Oct 6, 2011
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

A material of the stator core is different from a material of the housings, in a state where one end portion in the axis direction of the stator core is contacted to the first housing, and the other end portion in the axis direction of the stator core is contacted to the second housing; and a neighboring portion of a contact portion, at which the first housing is contacted to the stator core, and another neighboring portion of a contact portion, at which the second housing is contacted to the stator core, are connected by a connecting component in the axis direction, of which material is the same as a material of the stator core, whereby the first housing and the second housing are connected each other; and the first housing and the second housing face each other in a state where a gap intervenes between both housings.

First claim

What is claimed is:

1. A motor comprising:
an annular-shaped stator including a stator core on which a coil is wound; and
a rotor including a shaft, which is rotatably installed at a center of the stator, wherein
a first housing and a second housing, which are separated in a shaft direction of the rotor so as to be faced, with the stator and the rotor installed inside, with a contact portion of said first housing contacting one axial end of said stator core at a first contact point and a contact portion of said second housing contacting an opposite axial end of said stator core at a second contact point, and a material of the stator core being different from a material of the housings; and
a neighboring portion of the contact portion of the first housing and a neighboring portion of the contact portion of the second housing being connected by a connecting component in the axis direction, of which material is the same as a material of the stator core, whereby the first housing and the second housing are connected each other; and
wherein the second housing has a plurality of flanges extending in a diameter direction from the neighboring portion of the contact portion of the second housing, wherein a flange of the plurality of flanges is received within a recess formed in the first housing, wherein the flange receives the connecting component, wherein an outer peripheral surface of the flange faces an inner circumferential surface of the recess of the first housing, and a gap having a length and extending from an axially facing surface of the recess of the first housing to a lower surface of the flange of the second housing, the lower surface of the flange providing an upper extent of the gap, and the lower surface of the flange further being contiguous with the contact portion of the second housing such that the contact portion of the second housing and the upper extent of the gap are formed along a common surface and located at the length of the gap away from the axially facing surface of the recess of the first housing, and wherein substantially the entirety of said gap between said axially facing surface of the recess and the lower surface of said flange overlaps at least a part of the stator core in the axial direction of said stator core, to be disposed radially outwardly from said part of the stator core, and
wherein the lower surface of said flange is coplanar with said second contact point.

2. A motor as recited in claim 1 , wherein a peripheral wall of the first housing, which surrounds the stator core extended from the neighboring portion of the contact portion of the first housing, is faced to the second housing in a state where the gap intervenes in said axial direction between the peripheral wall and the second housing.

3. A motor as recited in claim 2 , wherein the plurality of flanges are contacted to the opposite end of the stator core, and the flanges of the second housing are connected, by a bolt used as the connecting component in the axis direction, to the neighboring portion of the contact portion of the first housing, whereby the first housing and the second housing are connected to each other.

4. A motor as recited in claim 3 , wherein an inner circumference surface of the peripheral wall of the first housing is contacted to an outer circumference surface of the flanges of the second housing.

5. A motor comprising:
an annular-shaped stator including a stator core on which a coil is wound; and
a rotor including a shaft, which is rotatably installed at a center of the stator; wherein
a first housing and a second housing, which are separated in a shaft direction of the rotor so as to be faced, with the stator and the rotor installed inside, with a contact portion of said first housing contacting one axial end of said stator core at a first contact point and a contact portion of said second housing contacting an opposite axial end of said stator core at a second contact point, and a material of the stator core being different from a material of the housings; and
a neighboring portion of the contact portion of the first housing and a neighboring portion of the contact portion of the second housing being connected by a connecting component in the axis direction, of which material is the same as a material of the stator core, whereby the first housing and the second housing are connected each other; and
wherein the second housing has a plurality of flanges extending in a diameter direction from the neighboring portion of the contact portion of the second housing, wherein a flange of the plurality of flanges is received within a recess formed in the first housing, wherein the flange receives the connecting component, wherein an outer peripheral surface of the flange faces an inner circumferential surface of the recess of the first housing, and a gap having a length and extending from an axially facing surface of the recess of the first housing to a lower surface of the flange of the second housing, the lower surface of the flange providing an upper extent of the gap, and the lower surface of the flange further being contiguous with the contact portion of the second housing such that the contact portion of the second housing and the upper extent of the gap are formed along a common surface and located at the length of the gap away from the axially facing surface of the recess of the first housing, wherein substantially the entirety of said gap between said axially facing surface of the recess and the lower surface of said flange overlaps at least a part of the stator core in the axial direction of said stator core, to be disposed radially outwardly from said part of the stator core, and
wherein said second contact point is displaced in said axial direction relative to the axially facing surface of the recess of the first housing by an amount equal to the length of the gap.

Assignees

• Asao Yoshihito
• Sonoda Isao
• Ushio Kohei
• Akutsu Satoru
• Mitsubishi Electric Corp

Inventors

• Asao Yoshihito
• Sonoda Isao
• Ushio Kohei
• Akutsu Satoru

Classifications

• H02K5/02

  Casings or enclosures characterised by the material thereof · CPC title

• H02K1/18

  Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures · CPC title

• H02K5/06

  Cast metal casings · CPC title

• H02K1/185 Primary

  to outer stators · CPC title