Rotor of flat-type motor

• US 3,997,806 A
• Filed: 12/06/1974
• Issued: 12/14/1976
• Est. Priority Date: 03/22/1972
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Mizoguchi, Hiroaki, Noto, Kunihiro
• Primary Examiner(s): Skudy, R.
• Application Number:
  US05/530,281
• Time in Patent Office: 739 Days
• Field of Search: 310/268, 310/227, 310/43, 310/237, 310/52, 310/40 MM, 310/61, 310/65, 310/58, 310/59, 310/66
• US Class Current: 310/268
• CPC Class Codes: H02K 15/12 Impregnating, heating or drying of windings, stators, rotors or machines
• CPC Class Codes: H02K 23/54 Disc armature motors or generators
• CPC Class Codes: H02K 3/00 Details of windings
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors

Abstract

A rotor for a flat-type motor is constructed to include a flat armature, which comprises a flat armature winding in the form of a disk, and an insulating resinous body in which the armature winding is embedded. The insulating resinous body has a greater thickness than the armature winding so as to cover the winding, but is formed with cooling structure, such as grooves and bores, in positions where the coil portions of the armature winding on which the magnetic flux of the field magnets acts effectively are embedded, thereby promoting dissipation of heat from the armature winding.

Claims

1. A rotor for a flat-type motor comprising a flat-type armature, a commutator and a rotary shaft,

wherein said flat-type armature comprises a flat armature winding arranged in the form of a flat disk, said armature winding including radially extending coil portions, and insulating resinous body means for embedding said armature winding, said insulating resinous body means including at least one major surface having groove means formed thereon for effecting self-cooling of said armature winding, said groove means being partially disposed in a portion of said resinous body means which covers said radially extending coil portions of said armature winding.

wherein said groove means include annular grooves arranged along the entire circumference of said at least one major surface of said insulating resinous body means, and

wherein said commutator is disposed in the central portion of said flat-type armature for electrical connection thereto, and said commutator is formed integrally therewith by said insulating resinous body means, said rotary shaft being secured to said commutator at the center thereof to extend perpendicularly to said flat-type armature.

2. A rotor as claimed in claim 1, wherein said groove means include at least two of said annular grooves.

3. A rotor as claimed in claim 2, wherein said two grooves have different widths.

4. A rotor for a flat-type motor comprising a flat-type armature, a commutator and a rotary shaft,

wherein said flat-type armature comprises a flat armature winding arranged in the form of a flat disk, said armature winding including radially extending coil portions, and insulating resinous body means for embedding said armature winding, said insulating resinous body means including at least one major surface having groove means formed thereon for effecting self-cooling of said armature winding, said groove means being partially disposed in a portion of said resinous body means which covers said radially extending coil portions of said armature winding,

wherein said groove means include annular grooves arranged along the entire circumference of opposite major surfaces of said insulating resinous body means in opposed relation to each other, and

wherein said commutator is disposed in the central portion of said flat-type armature for electrical connection thereto, and said commutator is formed integrally therewith by said insulating resinous body means, said rotary shaft being secured to said commutator at the center thereof to extend perpendicularly to said flat-type armature.

5. A rotor as claimed in claim 4, wherein said groove means include at least two of said annular grooves on each of said opposite major surfaces in opposed relation to each other.

6. A rotor as claimed in claim 5, wherein said two grooves have different widths.

7. A rotor for a flat-type motor comprising a flat-type armature, a commutator and a rotary shaft,

wherein said flat-type armature comprises a flat armature winding arranged in the form of a flat disk, said armature winding including radially extending coil portions and bending coil portions at the ends of said radially extending coil portions, and insulating resinous body means for embedding said armature winding, said insulating resinous body means including at least one major surface having groove means formed thereon and bore means formed therethrough, each of said groove means and bore means effecting self-cooling of said armature winding, said groove means being partially disposed in a portion of said resinous body means which covers said radially extending coil portions of said armature winding, and said bore means being disposed along each of said bending coil portions of said armature winding,

wherein said groove means include annular grooves arranged along the entire circumference of said at least one major surface of said insulating resinous body means, and

wherein said commutator is disposed in the central portion of said flat-type armature for electrical connection thereto, and said commutator is formed integrally therewith by said insulating resinous body means, said rotary shaft being secured to said commutator at the center thereof to extend perpendicularly to said flat-type armature.

8. A rotor as claimed in claim 7, wherein said groove means include at least two of said annular grooves.

9. A rotor as claimed in claim 8, wherein said two grooves have different widths.

10. A rotor as claimed in claim 8, wherein said bore means include at least two bores, each disposed at a bending coil portion, and wherein said two annular grooves are disposed between said two bores.

11. A rotor for a flat-type motor comprising a flat-type armature, a commutator and a rotary shaft,

wherein said flat-type armature comprises a flat armature winding arranged in the form of a flat disk, said armature winding including radially extending coil portions and bending coil portions at the ends of said radially extending coil portions, and insulating resinous body means for embedding said armature winding, said insulating resinous body means including at least one major surface having groove means formed thereon and bore means formed therethrough, each of said groove means and bore means effecting self-cooling of said armature winding, said groove means being partially disposed in a portion of said resinous body means which covers said radially extending coil portions of said armature winding, and said bore means being disposed along each of said bending coil portions of said armature winding,

wherein said groove means include annular grooves arranged along the entire circumference of opposite major surfaces of said insulating resinous body means in opposed relation to each other, and

wherein said commutator is disposed in the central portion of said flat-type armature for electrical connection thereto, and said commutator is formed integrally therewith by said insulating resinous body means, said rotary shaft being secured to said commutator at the center thereof to extend perpendicularly to said flat-type armature.

12. A rotor as claimed in claim 11, wherein said groove means include at least two of said annular grooves on each of said opposite major surfaces in opposed relation to each other.

13. A rotor as claimed in claim 12, wherein said two grooves have different widths.

14. A rotor as claimed in claim 12, wherein said bore means include at least two bores, each disposed at a bending coil portion, and wherein said two annular grooves on said opposite major surfaces are disposed between said two bores.