Molded motor

• US 5,982,057 A
• Filed: 11/25/1998
• Issued: 11/09/1999
• Est. Priority Date: 06/01/1998
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Nakao, Kenji, Sugiyama, Takeshi, Imada, Kensuke
• Primary Examiner(s): Ramirez, Nestor
• Assistant Examiner(s): Ghahramani, Saeed
• Application Number:
  US09/199,192
• Time in Patent Office: 349 Days
• Field of Search: 310/43, 310/45, 310/89, 310/90, 310/91
• US Class Current: 310/43
• CPC Class Codes: H02K 5/02 Casings or enclosures characterised by the material thereof

Abstract

The present invention provides a molded motor in which the axial center of an inserted body can easily be aligned with the axial center of the rotor of the mold motor.

The molded motor of the present invention is provided with: a stator 30 having a stator core 31 laminated from a plurality of layers of thin metal coldrolled steel plate and stator coils 8 mounted in the stator core 30; a rotor 2 rotatably disposed inside the stator 30; and a molded main body 4 made of resin which covers the stator 30 and has a receiving portion 17 in which an annulus 16 is received, wherein guide portions 34 are formed in the cold-rolled steel plate closest to the annulus 16 to align the axial center of the annulus 16 with the axial center of the rotor 2.

Claims

1. A molded motor comprising:

a stator having a stator core laminated from a plurality of layers of thin metal magnetic plate and stator coils mounted in said stator core;

a rotor rotatably disposed inside said stator; and

a molded main body made of resin which covers said stator and has a receiving portion in which an inserted body is received,

wherein guide portions are formed in said magnetic plate closest to said inserted body to align the axial center of said inserted body with the axial center of said rotor.

2. The molded motor according to claim 1 wherein said inserted body is an annulus which is a compositional element of a throttle valve device which regulates the amount of intake air in an internal combustion engine.

3. The molded motor according to claim 1 wherein said magnetic plate is a cold-rolled steel plate.

4. The molded motor according to claim 1 wherein said molded main body is composed of polyphenylene sulfide resin.

6. The molded motor according to claim 2 wherein said inserted body is an annulus which is a compositional element of a throttle valve device which regulates the amount of intake air in an internal combustion engine.

7. The molded motor according to claim 2 wherein said magnetic plate is a coldrolled steel plate.

8. The molded motor according to claim 2 wherein said molded main body is composed of polyphenylene sulfide resin.

5. A molded motor comprising:

a stator having a stator core laminated from a plurality of layers of thin metal magnetic plate and stator coils mounted in said stator core;

a rotor rotatable disposed inside said stator; and

a molded main body made of resin which covers said stator and has a receiving portion in which an inserted body is received,

wherein guide portions are formed in said magnetic plate closest to said inserted body to align the axial center of said inserted body with the axial center of said rotor, and

wherein said magnetic plate has a plurality of tooth portions extending radially inward which are formed equidistantly around it, and arc-shaped guide portions which are bent towards said inserted body and come into contact with said inserted body are formed in the ends of said tooth portions.

9. A molded motor comprising:

a stator having a stator core laminated from a plurality of layers of thin metal magnetic plate and stator coils mounted in said stator core;

a rotor rotatably disposed inside said stator; and

a molded main body made of resin which covers said stator and has a receiving portion in which an inserted body is received,

wherein guide portions are formed in said magnetic plate closest to said inserted body, and

wherein said guide portions elastically abut against a portion of said inserted body to align the axial center of said inserted. body with the axial center of said rotor.