JP2006141098A - Moulded motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molded motor where a wiring board can be easily connected with the coil of a stator even in the case of attaching it after having molded a motor frame by mold resin. <P>SOLUTION: A plastic connector 20 is arranged on the top side of a stator 12, and this connector 20 is provided with a connecting member 22, and the other end of a coil 16 is connected to one end of the connecting member 22, and the other end of the connecting member 22 projects from the top side of the connector 20, and this connector 20 is molded integrally with the stator 12 by mold resin, and a wiring board 32 is arranged on the top side of the molded connector 20, and also the other end of the connecting member 22 is electrically connected with the wiring board 32. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a molded motor in which a stator is embedded with a mold resin.

  As a conventional mold motor, a stator coil assembly part including a stator, a coil and an insulator, a mold resin covering only the stator coil assembly part, and fixing to at least a part of the stator coil assembly part The thing provided with the wiring board which carried out separately is proposed (for example, refer patent document 1).

In such a molded motor, there is an effect that a highly reliable mold motor can be obtained without applying stress during molding to a soldered portion of various electronic components such as an IC mounted on a wiring board by soldering. .
JP-A-11-155249

  However, in a molded motor having a structure in which the wiring board is attached to the mold resin covering only the stator coil assembly as described above, the end of the coil protruding from the stator is connected to the wiring board to be attached later. Is very difficult. In particular, since the stator is embedded with the mold resin, the end of the coil is also embedded with the mold resin unless the end of the coil is processed well.

  Therefore, in view of the above problems, the present invention provides a molded motor that can be easily connected to a stator coil even when a wiring board is attached after the motor frame is molded with a mold resin.

  According to the first aspect of the present invention, the stator core is pre-molded with an insulating resin to form an insulating layer, and the stator core with the insulating layer is wound with a coil and molded with a molding resin. In a molded motor having a motor frame and a wiring board separate from the motor frame, a connector made of synthetic resin is arranged on the upper surface of the stator, and a connection member is provided on the connector, and the connection member The end of the coil is connected to one end of the connector, the other end of the connecting member protrudes from the upper surface of the connector, the connector is integrally molded with the stator with a mold resin, and the molded connector The wiring board is arranged on the upper surface of the wiring member, and the other end of the connecting member is electrically connected to the wiring board. A molded motor.

  According to a second aspect of the present invention, the fixed protrusion protrudes from the upper surface of the connector, the fixed protrusion is inserted into the through hole of the wiring board, and the tip of the fixed protrusion is heated to the upper surface of the wiring board. The molded motor according to claim 1, wherein the molded motor is welded.

  The invention according to claim 3 is the molded motor according to claim 1, wherein the connector is a fan-shaped plate.

  According to a fourth aspect of the present invention, the molded motor is a three-phase brushless DC motor, and a three-phase coil is Y-connected, and the connecting member is a U-phase connecting member and a V-phase connecting member. The molded motor according to claim 1, comprising a W-phase connection member and a neutral point connection member.

  According to a fifth aspect of the present invention, one bracket for rotatably supporting a bearing of the rotor is molded integrally with a molding resin at a lower portion of the motor frame, and the other bracket is arranged with the wiring board on the connector. The molded motor according to claim 1, wherein the molded motor is fitted and fixed to an upper surface of the motor frame in a state where the motor is mounted.

  In the molded motor according to the first aspect of the present invention, the other end of the connection member protrudes from the upper surface of the connector integrally molded with the mold resin, and the wiring board is arranged on the upper surface of the connector. By electrically connecting the other end of the wiring board to the wiring board, the coil connected to the one end of the connecting member and the wiring board can be electrically connected easily. In addition, since the connector is being fixed to the upper surface of the stator with the mold resin, it does not come off from the stator.

  In the molded motor according to the second aspect of the present invention, the through hole of the wiring board is inserted into the fixed protrusion protruding from the upper surface of the connector and is thermally welded, thereby securely fixing the fixed protrusion to the upper surface of the connector. be able to.

  Hereinafter, a molded motor 10 according to an embodiment of the present invention will be described with reference to FIGS.

  The mold motor 10 constitutes a three-phase brushless DC motor. The stator core 14 of the stator 12 of the molded motor 10 is formed by laminating a plurality of steel plates in which a plurality of T-shaped teeth portions protrude from the inner peripheral portion of the ring-shaped core. An insulating layer 18 is pre-molded on the surface of the stator core 14 with an insulating resin. Three-phase coils 16 are wound around the teeth of the stator core 14 to which the insulating layer 18 is applied. The three-phase coil 16 is connected to the end of the U-phase coil 16, the end of the V-phase coil 16, the end of the W-phase coil 16, and the neutral point coil to perform Y-connection. 16 end portions protrude.

  A connector 20 shown in FIG. 3 is arranged on the upper surface in the axial direction of the stator 16 around which the coils 16 are wound. Specifically, it is placed on a support wall formed by an insulating layer 18 protruding from the upper surface of the stator 16. This connector 20 is a synthetic resinous fan-shaped plate body that is insert-molded, and three connection members 22 are embedded therein. The three connection members 22 are L-shaped metal plates, and one end portion protrudes from the outer peripheral portion of the connector 20 and the other end portion protrudes from the upper surface of the connector 20. As shown in FIG. 3, two fixed protrusions 24 protrude from the upper surface of the connector 20 at a predetermined interval.

  As described above, the connector 20 is arranged on the upper surface of the stator 12, and ends of the U-phase coil 16 and V-phase coil 16 at one end on the outer peripheral side of each connecting member 22. The end of the W-phase coil 16 and the end of the neutral-point coil 16 are bound and fixed by soldering.

  The motor frame 26 is formed by integrally molding the connector 20 disposed on the stator 12 by wiring and one metal bracket 42 with a molding resin. The motor frame 26 is provided with a storage portion 30 for storing the rotor 28. Further, the stator 12 and the connector 20 are integrally fixed by a mold resin. Furthermore, the end of the coil 16 connected to one end of the connection member 22 is also embedded in the mold resin.

  On the upper surface of the motor frame 26, the upper surface of the connector 20 is exposed. A donut plate type wiring board 32 is attached to the exposed upper surface of the connector 20. Electronic components such as an IC 44 for driving the brushless DC motor are mounted on the wiring board 32. In addition, two through holes 34 through which the fixed protrusions 24 penetrate are provided at predetermined positions of the wiring board 32. Therefore, the wiring board 32 can be positioned with respect to the connector 20 by passing the fixed protrusion 24 through the through hole 34. Then, after passing the fixed protrusion 24 through the through-hole 34, the wiring board 32 can be completely fixed to the upper surface of the connector 20 by thermally welding the tip of the fixed protrusion 24 and the wiring board 32. Can be placed stably.

  In the wiring board 32, three connection holes 35 are opened at positions corresponding to the three connection members 22, and the three connection holes 35 of the wiring board 32 positioned by the fixing protrusions 24 and the three connection members. The other end portions of the connection members 22 coincide with each other, and the other end portions of the connection members 22 are inserted into the connection holes 35. Then, by soldering the other end of the connection member 22 to the wiring board 32, the wiring portion of the wiring board 32 and the other end of the connection member 22 are electrically connected. As a result, the coil 16 and the wiring portion of the wiring board 32 are electrically connected.

  Next, the rotor 28 is attached to the storage unit 30 via the bearing 36. In this case, the bearing 36 is attached to one bracket 42.

  Finally, the other metal bracket 40 is put on the motor frame 26 and fixed with screws. In this case, a bearing 38 is attached to the bracket 40, and the rotor 28 is rotatably attached to the motor frame 26.

  With the mold motor 10 described above, the coil 16 of the stator 12 and the wiring board 32 can be easily electrically connected.

  Since the wiring board 32 and the motor frame 26 are not embedded with the mold resin, there is no fear that the electronic elements such as the IC 44 on the wiring board 32 are destroyed by heat, and the solder connection portion is stressed and loses its function. Absent. Further, since heat at the time of molding is not applied, a temperature protection element can be built on the wiring board 32, and even a component having low heat resistance can be used.

  The connector 20 is completely fixed to the stator 12 by the mold resin, and the wiring board 32 can be completely fixed to the connector 20 by the fixing protrusion 24.

  Even if the IC 44 or the like on the wiring board 32 breaks down, the wiring board 32 can be easily removed from the connector 20 by removing one of the brackets 40 and removing the thermal welding of the fixed protrusion 24. Exchange is also possible.

(Example of change)
The present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist thereof.

  In the above embodiment, the connector 20 is a fan-shaped plate, but instead of this, it may be a donut-shaped plate or a rectangular plate.

  The molded motor of the present invention is suitable as a drive source for air conditioners, home appliances, and the like.

It is a longitudinal cross-sectional view of the mold motor which shows one Embodiment of this invention. It is a partial expanded longitudinal cross-sectional view of the mold motor of this embodiment. It is a top view of the connector of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mold motor 12 Stator 14 Stator core 16 Coil 18 Insulating layer 20 Connector 22 Connecting member 24 Fixed protrusion 26 Motor frame 28 Rotor 30 Storage part 32 Wiring board 34 Through-hole

Claims (5)

A motor frame in which a stator iron core is pre-molded with an insulating resin to form an insulating layer, and a stator having a coil wound around the stator core with the insulating layer is molded with a molding resin, and the motor frame In a molded motor having a separate wiring board and
A synthetic resin connector is arranged on the upper surface of the stator, a connection member is provided on the connector, an end of the coil is connected to one end of the connection member, and the other end of the connection member is Protruding from the upper surface of the connector, the connector is integrally molded with the stator together with a mold resin,
The wiring board is arranged on the upper surface of the molded connector, and the other end of the connecting member is electrically connected to the wiring board. The fixed protrusion protrudes from the upper surface of the connector, the fixed protrusion is inserted into the through hole of the wiring board, and the tip of the fixed protrusion is thermally welded to the upper surface of the wiring board. The molded motor according to claim 1. The molded motor according to claim 1, wherein the connector is a fan-shaped plate. The mold motor is a three-phase brushless DC motor, and a three-phase coil is Y-connected, and the connection member is a U-phase connection member, a V-phase connection member, a W-phase connection member, and a medium. It consists of a connection member for sex points. The mold motor according to claim 1 characterized by things. One bracket that rotatably supports the rotor bearing is molded integrally with a lower portion of the motor frame by a molding resin,
2. The molded motor according to claim 1, wherein the other bracket is fitted and fixed to the upper surface of the motor frame in a state where the wiring board is disposed on the connector.

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