JP2007124820A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor which permits the teeth to face the center without falling even if a heavy load is applied. <P>SOLUTION: A stator 14 is provided with six teeth 18 so as to protrude on the inner circumferential side of a cylindrical core bag 16. The teeth 18 in a roughly T shape is composed of a base 22 and an energizing portion 24. The base 22 of the teeth 18 is installed with a bobbin 30 wound with a stator winding 28. The front end 32 of the bobbin 30 abuts against the front end 32 of another bobbin 30 mounted on the adjacent teeth 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a motor having a plurality of teeth protruding on the inner peripheral side of a core bag.

Conventionally, a stator of a motor has a plurality of separate teeth attached to the inner peripheral side of a ring-shaped or cylindrical core bag. The stator winding is wound around the teeth in advance before attaching the teeth to the core bag (see, for example, Patent Document 1).
JP 2005-269831 A

  A longitudinal sectional view of a conventional motor is shown in FIG.

  As shown in FIG. 2, for example, six separate teeth 106 are attached to the stator 102 of the motor 100 on the inner peripheral side of the ring-shaped core bag 104. A stator winding 110 wound around the hobbin 108 is attached to the teeth 106 in advance, and the assembly of the stator 102 is completed by attaching the teeth 106 to the core bag 104. A rotor 112 is rotatably attached to the inner peripheral side of the stator 102.

  In the motor 100 as described above, the teeth 106 have a substantially T shape including a base portion 114 and an excitation portion 116, and a protrusion 118 is provided at a base portion of the base portion 114. The protrusion 118 is a core. The T-shaped teeth 106 are attached to the core bag 104 by fitting into the recesses 120 provided on the inner peripheral side of the bag 104.

  However, in this attachment method, when a large load is applied to the teeth 106, a large force is applied to the fitting portion, and the teeth 106 are displaced from the center direction of the motor 100. That is, the teeth 106 are in a state of falling down.

  Therefore, in view of the above problems, the present invention provides a motor that is directed toward the center without falling down even when a large load is applied to the teeth.

  The invention according to claim 1 is a motor having a stator attached so that a plurality of teeth protrude on the inner peripheral side of a ring-shaped or cylindrical core back, wherein the teeth are attached to the core back. The stator winding is substantially T-shaped and includes a base portion for winding the stator winding and an excitation portion protruding in the circumferential direction from the base portion. The motor is characterized in that an insulating part is provided for insulation with the insulating part, and the insulating part is in contact with an insulating part provided in an adjacent tooth.

  The invention according to claim 2 is characterized in that the insulating portion is provided up to the exciting portion, and the insulating portion provided in the exciting portion is in contact with the adjacent insulating portion. It is a motor.

  The invention according to claim 3 is the motor according to claim 1, wherein the insulating portion is a bobbin around which the stator winding is wound.

  The invention according to claim 4 is the motor according to claim 1, wherein the insulating portion is an insulating resin pre-molded on the teeth.

  The invention according to claim 5 is the motor according to claim 1, wherein the motor is a molded motor in which the stator is molded with a mold resin.

  The invention according to claim 6 is the motor according to claim 1, wherein the motor frame of the motor is made of a steel plate.

  The invention according to claim 7 is the motor according to claim 1, wherein the motor is an AC motor.

  The invention according to claim 8 is the motor according to claim 1, wherein the motor is a brushless DC motor.

  In the motor according to the present invention, since the insulating portion formed on the tooth is in contact with the insulating portion provided on the adjacent tooth, even if a large load is applied to the tooth, the tooth falls due to this contact portion. There is nothing to do.

(First embodiment)
A motor 10 according to a first embodiment of the present invention will be described with reference to FIG.

  The motor 10 is an AC motor, and is an inner rotor type motor in which the rotor rotates on the inner peripheral side of the stator 12.

  The stator 12 includes a ring-shaped or cylindrical core bag 16 and six teeth 18 attached to the inner peripheral side of the core bag 16.

  The core bag 16 is formed by laminating ring-plate-shaped steel plates, and a trapezoidal concave portion 20 is provided at an equal angle on the inner peripheral side.

  The teeth 18 are substantially T-shaped, and include a linear base portion 22, a pair of excitation portions protruding in the circumferential direction from the tip of the base portion 22, and a trapezoidal protrusion portion 26 protruding from the base of the base portion 22.

  Before attaching the tooth 18 described above to the core bag 16, the bobbin 30 around which the stator winding 28 is wound is inserted into the base portion 22 of the tooth 18 from the base side of the base portion 22. The bobbin 30 is formed of an insulating synthetic resin and is in a state of covering the exciting portion 24 of the tooth 18. The portion of the bobbin 30 that covers the exciting portion 24 is hereinafter referred to as a “bobbin tip portion 32”.

  As described above, the bobbin 30 is attached to the tooth 18, the protrusion 26 of the tooth 18 is inserted through the recess 20 of the core bag 16 in the axial direction, and the tooth 18 is attached to the core bag 16. In this case, the portion of the bobbin 30 located on the side opposite to the bobbin tip 32 is brought into contact with the inner peripheral side of the core bag 16. When the six teeth 18 are attached to the inner peripheral side of the core bag 16, one bobbin tip 32 abuts on the bobbin 32 attached to the adjacent teeth 18 and fixes the teeth 18. The contact portion between the bobbin tip portions 32 will be described in more detail. A contact surface 36 is formed in an axial direction at a circumferential portion of the bobbin tip portion 32, and the contact surfaces 36 and 36 contact each other. They are fixed to each other so as not to move.

  The stator 12 formed as described above is housed in a steel frame (not shown) and a rotor 14 is rotatably attached to the inner peripheral side of the stator 12. The rotor 14 is provided with a rotation shaft 34 at the center thereof. Thereby, the motor 10 is completed.

  When the motor 10 is used, a large load is applied to the teeth 18, and even if a force that causes the teeth 18 to fall against the core bag 16 is applied, the adjacent bobbin tip portions 32, 32 are in contact with each other. The rotation performance of the motor 10 can be maintained without falling down.

(Second Embodiment)
Next, the motor 10 of the second embodiment will be described.

  In the motor 10 of the first embodiment, the stator winding 28 is wound around the bobbin 30 and attached to the teeth 18. Instead of this, in the present embodiment, the teeth 18 are pre-molded with an insulating resin. The stator winding 28 is directly wound around the insulating layer formed by this premold.

  That is, six teeth 18 are arranged concentrically and pre-molded with an insulating resin to form an insulating layer. In this case, the insulating layers formed on the adjacent teeth 18 are in contact with each other, or the teeth 18 and the teeth 18 are integrally formed by the insulating layers.

  Thereafter, the stator winding 28 is wound around each tooth 18, and the six integrated teeth 18 are attached to the inner peripheral side of the core bag 16.

  Even in the motor 10 to which such an insulating layer is applied, the exciting portions 24 of the adjacent teeth 18 are in contact with each other or are integrally formed. The teeth 18 will not fall over even if it takes.

(Modification 1)
In the above embodiment, the bobbin tip portions 32 provided in the excitation unit 24 are brought into contact with each other. However, the present invention is not limited to this, and if the bobbin 30 in the portion located on the inner peripheral side of the teeth 18 is brought into contact with each other, the teeth 18 can be prevented from falling.

(Modification 2)
In the above embodiment, the stator 12 is housed in a steel frame motor frame. Alternatively, the entire stator 12 may be molded with a mold resin to form a molded motor.

(Modification 3)
Although the AC motor has been described in the above embodiment, the present invention is not limited to this, and a brushless DC motor may be used.

It is a longitudinal cross-sectional view of the motor which shows the 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the conventional motor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Motor 12 Stator 14 Rotor 16 Core bag 18 Teeth 20 Concave part 22 Base part 24 Excitation part 26 Protrusion part 28 Stator winding 30 Bobbin 32 Bobbin tip part

Claims (8)

In a motor having a stator attached so that a plurality of teeth protrude on the inner peripheral side of a ring-shaped or cylindrical core back,
The teeth are attached to the core back and have a substantially T-shape consisting of a base part for winding a stator winding and an excitation part protruding in the circumferential direction from the base part,
The base of the teeth is provided with an insulating portion for insulating from the stator winding,
The motor, wherein the insulating portion is in contact with an insulating portion provided on an adjacent tooth. The insulating part is provided up to the excitation part,
The motor according to claim 1, wherein an insulating portion provided in the exciting portion is in contact with the adjacent insulating portion. The motor according to claim 1, wherein the insulating portion is a bobbin around which the stator winding is wound. The motor according to claim 1, wherein the insulating portion is an insulating resin pre-molded on the teeth. The motor according to claim 1, wherein the motor is a molded motor in which the stator is molded with a mold resin. The motor frame of the said motor is a product made from a steel plate. The motor of Claim 1 characterized by the above-mentioned. The motor according to claim 1, wherein the motor is an AC motor. The motor according to claim 1, wherein the motor is a brushless DC motor.

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