JP3087881B2 - Electric motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly, to a structure of a stator and a method of mounting lead wires.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, an electric motor is provided with an insulator 2 mounted on a stator core 1, a winding 3 wound thereon, a lead wire 16 of the winding being sandwiched between lead bushes 6, and Is molded together with the stator core by molding resin 7 to form a stator. Both ends of a shaft 14 of a rotor 13 having a magnet 12 on its outer periphery are supported by bearings 10, and at least one side of the bearing is supported by a bracket 11. Incorporating the rotor into the stator,
After that, in consideration of the heat resistance of the rotor position detecting element 9, the rotor position detecting element 9 is mounted on the printed circuit board 8, the connector 4 is mounted on the printed circuit board, and the lead wire 5 is connected to the connector. The wire is mounted on the guide groove 15 of the lead wire provided on a part of the mold resin 7 and the bracket 11, and the bracket is put on the guide groove 15 to constitute the electric motor. In this case, a gap is generated between the lead wire and the guide groove of the mold resin or the bracket, and when the motor is used outdoors, there is a problem that water permeates through the gap to deteriorate water resistance and reduce reliability. Has occurred.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and to eliminate a gap between a guide groove of a lead wire and a lead wire when an electric motor is used outdoors. An object of the present invention is to provide an electric motor with enhanced water resistance and improved reliability.

[0004]

In order to achieve the above object, a winding is wound around a stator core, and a lead wire connected to a connector is sandwiched together with a lead wire of the winding, and the lead bush is fixed together with the stator core. A resin-molded stator is formed, both ends of a rotor shaft are supported by bearings, and at least one side of the bearings is supported by a bracket, and the rotor is assembled into the stator, and then a print is mounted with a rotor position detecting element. The motor was configured so that the board and the lead wires were connected by a connector or soldering, the printed board was fixed to the stator, and a bracket was covered, and one side of the bearing was supported by the bracket.

[0005]

According to the above construction, the lead wire of the connector is sandwiched between the lead bush and the lead wire of the winding, and the lead bush and the stator core are integrally formed of resin. The groove disappears,
Because the lead wire is supported in close contact with the lead bush,
When used outdoors, water is prevented from penetrating inside the stator.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view taken along a center line of a shaft of an electric motor according to the present invention. First, the insulator 2 is mounted on the stator core 1 and the winding 3 is wound. Next, the lead wire 5 connected to the connector 4 is sandwiched between the lead bush 6 and the lead wire of the winding 3. Thereafter, the lead bush and the stator core are integrally molded with the mold resin 7 to form a stator. On the other hand, a rotor assembled by fitting a shaft to a rotor core is incorporated into the stator. In this case, one side of the bearing is supported by a resin-molded stator. On the other hand, the rotor position detecting element is mounted on a printed circuit board 8, and the connector 4 is mounted on the printed circuit board. Next, the printed board is connected to the lead wire 5 held between the lead bushes 6 by a connector 4 or soldering, and the printed board is fixed to the stator. After that, one side of the bearing is supported by being covered with a bracket to constitute an electric motor.

In the above embodiment, one side of the bearing is supported by the bracket. However, the bracket may be provided on both sides, and the bearing on both sides may be supported by the bracket. With the above-described configuration, the connector lead wire and the winding lead wire can be sandwiched between the lead bushes and formed in close contact with each other, and the rotor position detecting element is heated during resin molding of the stator core. Thus, the electric motor can be configured without any trouble.

[0008]

As described above, according to the present invention, the lead wire is sandwiched between the lead bush and the winding lead wire, and the lead bush and the stator core are integrally formed of resin to form a stator, and the rotor is incorporated. Then, the printed circuit board and the lead wire were connected with a connector or soldering, the printed circuit board was fixed to the stator, the bracket was covered, the bearing was supported by the bracket, and the motor was configured. Since the guide groove is eliminated and the lead wire and the lead bush are in close contact with each other, when used outdoors, water resistance is enhanced and reliability is improved, and after the resin molding process of the stator, the printed circuit board is connected to the connector. To connect with the lead wire,
Since the printed circuit board is fixed to the stator and the motor is configured by covering the bracket, the reliability of the rotor position detecting element on the printed circuit board against heat can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along a center line of a shaft of a motor of the present invention.

FIG. 2 is a sectional view taken along a center line of a shaft of a conventional electric motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator core 2 Insulator 3 Winding 4 Connector 5 Connector lead wire 6 Lead bush 7 Mold resin 8 Printed circuit board

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuji Soma, 1116, Suenaga, Takatsu-ku, Kawasaki City Inside Fujitsu General Co., Ltd. Koji Shimohara (56) References JP-A-4-91648 (JP, A) JP-A-5-103439 (JP, A) JP-A-57-183053 (JP, U) JP-A-2-49362 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02K 5/22 H02K 5/08 H02K 5/10 H02K 29/08

Claims (2)

(57) [Claims] 1. A stator core is provided with a winding, a lead wire of the winding is sandwiched between lead bushes, and the lead bush is resin-molded together with the stator core to form a stator. The bearing is supported by a bearing, and at least one side of the bearing is supported by a bracket, and the rotor is incorporated into a stator, a lead wire is connected to a connector of a printed circuit board having a rotor position detecting element, and the printed circuit board is fixed to the stator. In a motor in which a bracket is covered and one side of a bearing is supported by the bracket, a lead wire of a connector is sandwiched between the lead bush and a lead wire of a winding, and the lead bush is resin-molded together with the stator core. An electric motor characterized in that: 2. A printed circuit board having said rotor position detecting element is connected to said lead wire after resin molding of a stator core by means of a connector or solder mounted on said printed circuit board. Item 1
An electric motor as described.