JP2010213415A - Conduction structure of motor, motor, and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conduction structure of a motor improved in electric conduction and in-motor heat transfer performance, in the motor having a stator structure sealed to an insulating material. <P>SOLUTION: In the motor 1 having the stator structure sealed with the insulating material, there is formed the conduction structure which is composed of a stator core 2 and a conduction member 5 adhered to one end face of the stator core 2 by a conductive adhering means 4 such as a conductive adhering tape, and in which at least a part of the conduction member 5 is made a conductive structure exposed without being sealed with the insulating material. A metal member may be used as the conduction member 5. The conductive adhering means 4 has such a structure as to be adhered to the stator core 2 toward the side face from the end face of the stator core 2. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a motor conduction structure, a motor, and a method for manufacturing the motor, and in particular, in a motor having a stator structure sealed with an insulating material, the electric conduction and the motor internal heat transfer performance are excellent, and the manufacturing process is also advantageous. The present invention relates to a motor conduction structure, a motor, and a manufacturing method thereof.

  Conventionally, in a motor having a stator structure sealed with an insulating material, in order to ensure electrical continuity between the inside (stator core) and the outside, metal pins are welded or driven into the stator core and sealed. After stopping, the pins are brought into contact with the front lid, rear lid, and the like.

  FIG. 2 is a cross-sectional view illustrating a conventional motor conduction method. In the drawing, the conduction method indicated by the pin 25 is a state in which the pin 25 is physically brought into contact with the stator core 22 by welding before the stator core 22 is sealed with the insulating material, and is exposed from the insulating material after sealing. The pin 25 is brought into contact with the front lid, the rear lid, etc., thereby ensuring conduction.

  Further, in the drawing, the conduction method indicated by the pin 24 is that the stator core 22 is sealed with an insulating material, and then the pin 24 is driven into the stator core 22, the inner end of the pin 24 is brought into contact with the stator core 22, and the exposed end is This is a method of ensuring continuity by contacting the front lid, the rear lid, and the like.

  In addition, as a proposal to increase the heat transfer effect of the heat generated inside the motor, by attaching a metal having high heat conductivity to the stator core, this can be brought into contact with the front lid, thereby improving the heat transfer effect. This technique is also disclosed (Patent Document 1).

Japanese Patent Application Laid-Open No. 2009-22080 “Molded Motor”

  Now, as described above, in a motor having a stator structure sealed with an insulating material, conventionally, an operation of welding or driving a pin is necessary in order to ensure internal electrical conduction. In the manufacturing process, it took considerable production time.

  On the other hand, as in Patent Document 1, in the case of a technique in which a metal having high thermal conductivity is attached to the stator core and then sealing is performed by injection molding, a gap is generated between the stator core and the metal by the injection pressure. As a result, the heat conduction effect is reduced. Furthermore, there has been a problem that the metal is displaced due to the injection pressure and a molding defect occurs.

  The problem to be solved by the present invention is that, except for the problems of the prior art, in a motor having a stator structure sealed with an insulating material, a motor conduction structure excellent in electrical conduction and motor internal heat transfer performance, motor And a method of manufacturing the same.

  Another object of the present invention is to provide a motor conduction structure, a motor, and a method for manufacturing the same, which can solve various problems in the manufacturing process. In other words, in the motor manufacturing process, it takes less time than in the past, and thus the working method of the motor, which can reduce the work labor, and the like, there is no generation of a gap between the stator core and the conductive member due to the injection pressure, and there is no molding failure. An object is to provide a motor conduction structure or the like that can also prevent generation.

  As a result of studying the above problems, the present inventor has conceived that this can be solved by attaching a member having high thermal conductivity and conductivity to the stator core through an adhesive means having high thermal conductivity and conductivity. It came to. That is, the invention claimed in the present application, or at least the disclosed invention, as means for solving the above-described problems is as follows.

(1) A conduction structure in a motor having a stator structure sealed with an insulating material, the conduction structure comprising a stator core and a conduction member bonded to one end surface of the stator core by a conductive adhesive means, A motor conduction structure in which at least a part of the conduction member is exposed without being sealed with an insulating material.
(2) The conductive structure for a motor according to (1), wherein the conductive adhesive means is bonded to the stator core from an end surface to a side surface of the stator core.
(3) The conductive structure of the motor according to (1) or (2), wherein the conductive adhesive means is an adhesive tape or an adhesive.

(4) The motor conduction structure according to any one of (1) to (3), wherein the conduction member is made of metal.
(5) A motor provided with the conduction structure according to any one of (1) to (4).
(6) A method of manufacturing a motor having a stator structure sealed with an insulating material, wherein a conductive adhesive means is attached from one end face to a side face of the stator core, and a conductive member is attached to an end face portion of the conductive adhesive means. A method of manufacturing a motor, comprising sealing the stator core with an insulating material by injection molding so that at least a part of the conductive member is exposed.

  Since the motor conduction structure, the motor, and the manufacturing method thereof according to the present invention are configured as described above, according to this, in a motor having a stator structure sealed with an insulating material, electrical conduction performance and motor internal heat transfer Performance can be improved.

  Further, according to the motor manufacturing method and the like of the present invention, the conductive structure can be formed in the motor manufacturing process in less time than before, and the work labor can be reduced. Furthermore, it is possible to eliminate the occurrence of a gap between the stator core and the conducting member due to the injection pressure, to eliminate the occurrence of molding defects, and to improve the product yield. Further, since the gap between the stator core and the conductive member is eliminated and the two are reliably bonded, there is an advantage that the strength of the conductive structure is improved.

It is sectional drawing which shows the conduction structure of the motor of this invention. It is sectional drawing which shows the conduction method of the conventional motor.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing a conduction structure of a motor of the present invention. As shown in the figure, the conductive structure of the present invention comprises a stator core 2 and a conductive member 5 bonded to one end face of the stator core 2 by a conductive bonding means 4 in a motor 1 having a stator structure sealed with an insulating material. The main configuration is that at least a part of the conductive member 5 is exposed without being sealed with an insulating material.

  With this configuration, in the motor conduction structure of the present invention, the exposed portion of the conduction member 5 mediated by the conductive adhesive means 4 is in contact with or connected to an external structure such as a front lid, so that the stator core 2 inside the motor 1 and the outside The electrical continuity between the two can be ensured.

  As shown in the figure, the conductive bonding means 4 can be structured to be bonded to the stator core 2 from the end surface to the side surface of the stator core 2. When the conductive bonding means is provided only on the end face of the stator core 2, the bonding area between the conductive bonding means and the stator core 2 is only the end face. Therefore, if the conductive adhesive means peels from the stator core 2, the conductive member 5 also peels at the same time. However, if the conductive bonding means 4 is provided on the side surface of the stator core 2, the bonding strength between the conductive bonding means 4 and the stator core 2 is increased, and the bonding state of the conductive member 5 is also better maintained.

  As the conductive adhesive means 4, a conductive adhesive tape or adhesive can be suitably used. Furthermore, use of an adhesive tape or adhesive having good thermal conductivity is advantageous in improving heat transfer performance. As the conductive member 5, an appropriate metal material can be suitably used.

  That is, by using an appropriate metal member as the conductive member 5 and using a conductive adhesive tape or adhesive as the conductive bonding means 4, the thermal conductivity and conductivity between the stator core 2 and the conductive member 5 are achieved. In addition, the adhesive strength can be improved with certainty, and not only ensuring electrical continuity but also the ability to conduct heat to the outside.

  Further, due to the adhesive effect obtained by using the conductive adhesive means 4, it is possible to prevent the occurrence of deviation of the conductive member 5 due to the injection pressure of the injection molding even when sealing with an insulating material, thereby preventing the occurrence of molding defects or Can be reduced.

  Similarly, because of the bonding effect, the stator core 2 and the conductive member 5 are securely bonded, and there is no gap between the two due to the injection pressure of the injection molding, so that the strength of the conductive structure is improved and the conductivity is also improved. Ensuring electrical continuity to the outside without welding or driving in pins as in the prior art leads to a significant reduction in work.

  In order to form the motor conduction structure of the present invention, the conductive adhesive means 4 is attached from one end surface to the side surface of the stator core 2, and the conductive member 5 is adhered to the end face portion of the conductive adhesive means 4. And the motor 1 manufacturing process should just be implemented in the procedure of sealing the stator core 2 with an insulating material by injection molding so that at least one part of the conduction member 5 may be exposed.

  According to the motor conduction structure of the present invention, the motor, and the manufacturing method thereof, in a motor having a stator structure sealed with an insulating material, the electrical conduction and the motor internal heat transfer performance are excellent, the work labor is reduced, and the yield is improved. It is possible to provide a motor having an advantage in the manufacturing process. Therefore, the invention is highly industrially applicable.

DESCRIPTION OF SYMBOLS 1 ... Motor 2 ... Stator core 3 ... Mold with insulating material 4 ... Conductive adhesive means 5 ... Conductive member 6 ... Rotor 7 ... Shaft 21 ... Motor, 22 ... Stator core, 23 ... Mold with insulating material, 24 ... Pin (driving), 25 ... pin (welding), 26 ... rotor, 27 ... shaft

Claims (6)

A conduction structure in a motor having a stator structure sealed with an insulating material, the conduction structure comprising a stator core and a conduction member bonded to one end surface of the stator core by a conductive adhesive means. A motor conduction structure in which at least a part is exposed without being sealed with an insulating material. 2. The motor conduction structure according to claim 1, wherein the conductive bonding means is bonded to the stator core from an end surface to a side surface of the stator core. The motor conductive structure according to claim 1, wherein the conductive adhesive means is an adhesive tape or an adhesive. The motor conduction structure according to claim 1, wherein the conduction member is made of metal. A motor comprising the conductive structure according to claim 1. A method of manufacturing a motor having a stator structure sealed with an insulating material, wherein a conductive adhesive means is attached from one end face to a side face of a stator core, a conductive member is bonded to an end face portion of the conductive adhesive means, and the conduction A method for manufacturing a motor, comprising sealing the stator core with an insulating material by injection molding so that at least a part of the member is exposed.

Images