Method of making a resin-molded motor

• US 5,191,698 A
• Filed: 06/02/1992
• Issued: 03/09/1993
• Est. Priority Date: 09/14/1988
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Kondo, Genki, Takamiya, Yutaka, Inaki, Shigeo, Sumi, Masatomo
• Primary Examiner(s): Hall, Carl E.
• Application Number:
  US07/878,610
• Time in Patent Office: 280 Days
• Field of Search: 25/569, 25/598, 25/609, 310/42, 310/43, 310/45, 310/216-218, 310/86, 310/89
• US Class Current: 29/596
• CPC Class Codes: D06F 37/304 Arrangements or adaptations of electric motors
• CPC Class Codes: H02K 1/16 Stator cores with slots for windings
• CPC Class Codes: H02K 3/345 between conductor and core, e.g. slot insulation
• CPC Class Codes: H02K 5/08 Insulating casings
• CPC Class Codes: H02K 5/1732 radially supporting the rotary shaft at both ends of the rotor H02K5/1737 takes precedence
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine
• CPC Class Codes: Y10T 29/49078 Laminated

Abstract

A resin-molded motor constituted by a rotor, a laminated stator having generally axially and radially extending slots defining pole pieces therebetween and resin material molded in the inner portions of the slots and over the inner ends of the slots for insulation and bonding of the laminated stator, a generally cylindrical resin material shroud at each end of the stator extending from the corresponding axial end face at the inner peripheral portion thereof and extending axially of the motor, a steel sheet bracket on the axially outer end of each of the shrouds and having journal means therein supporting the rotor, a plurality of windings around the pole pieces of the stator and having axially outer coil ends against the shrouds, a connector having connector terminals to which conductor ends of the windings are connected for supplying power to the windings, and a housing of resin material molded around the stator, the windings, the shrouds, the brackets and the connector with the terminals exposed from the housing.

Claims

1. A method of producing a resin-molded motor comprising disposing a punched-out stator member with independent magnetic poles between a couple of units of punched-out core member with magnetic poles interconnected at inner edges of its slots to form a ring, laminating said members, cladding said slots, inner edges and ends of the assembly by resin molding for insulation and bonding to fabricate a magnet pole member, forming a generally cylindrical synthetic resin shroud, the inner diameter of which is equal to that of the magnetic pole member and the outer diameter of which is equal to that of the insulation layer at the bottom of the slot, with the inner and outer diameters being tapered toward the tip, with the length of the shroud being slightly greater than the length of the coil end, applying windings to said magnetic pole member, connecting the coil ends of windings to connector terminals, inserting wedges, fitting projections of a yoke member having cut-out groves for passage of resin along its outer periphery into the slot openings of the magnetic pole member to form a stator, disposing a separately molded shroud of the same shape as the first-mentioned shroud at the other end face of said magnetic pole member, disposing a sheet steel bracket with journal means for supporting a bearing for a rotor at the end of such shrouds, applying windings to said stator, connecting coil ends of said windings to connector terminals, and forming a frame for housing said stator, windings, shrouds and brackets and said connector in an integral unit by resin molding.