JPH11289702A - Wiring board of motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the wiring board of a motor which is capable of saving the man-hours of wiring work, reduce the size of the motor, and obtain high waterproof performance of a connector part. SOLUTION: This wiring board 6 of a motor is composed of a board main part 10, on which stator coils 2 are wired and connected and a power line connector 11 provided integrally on the board main part 10. Bolt insertion seats which are brought into contact with bolts 9 may be formed, and furthermore, board patterns with which the seats are electrically connected to a grounding pin 13 of the power line connector 11 may be formed on the board main part 10 in order to connect a stator core 3 electrically to the grounding pin 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring board for an electric motor for wiring and connecting stator coils.

[0002]

2. Description of the Related Art In an electric motor, it is common practice to rationalize wiring work by wiring and connecting stator coils using a wiring board. However, in the conventional electric motor, as shown in FIGS. 6 to 8, the wiring board a for wiring the stator coil g and the power line connector c are separate bodies, so that the board side connector provided on the wiring board a is provided. It is necessary to connect lead b and power line connector c with lead wire d. Then, this wiring work and the ground wire e
The connection between the power line connector c and the power line connector c is still performed manually, and the wiring process is not rationalized.

Further, a lead d
Must be formed and a space f for accommodating the same must be formed. Therefore, the diameter of the stator core h and the upper flange i mounted on the upper surface thereof becomes large, or the power line connector c moves away from the upper flange i. It protruded greatly and hindered miniaturization of the motor. Further, when the electric motor is used outdoors or used as a part of a cutting machine using a cutting fluid, it often suffers from water. In such a case, in the above-described conventional electric motor, the connection between the board side connector b and the power line connector c is made. There is a possibility that water may enter the connection part.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the work of wiring work and to reduce the size of an electric motor.
It is an object of the present invention to provide a motor wiring board having high waterproof performance of a connector portion.

[0005]

According to the present invention, there is provided a wiring board for a motor in which a power line connector is integrally provided on a board body for wiring and connecting a stator coil. With the configuration in which the board main body and the power line connector are integrated, the trouble of connecting the board main body and the power line connector with the lead wires and the space for the connection work are unnecessary. In addition, a seam serving as a water intrusion path is not formed between the board main body and the power line connector.

[0006] The board body joined to the stator core via the bolts is provided with a bolt insertion pedestal for contacting the bolt, and a board pattern for conducting the pedestal and the ground pin of the power line connector is provided. May be electrically connected to the ground pin of the power line connector by joining the two with bolts. With this configuration, the ground wiring of the stator core is performed simultaneously with the mounting of the wiring board with the bolts.

[0007]

1 and 2 show a first embodiment of the present invention. The stator 1 of the electric motor includes a stator core 3 on which a plurality of stator coils 2 are arranged along the inner periphery, an upper flange 4 and a lower flange 5 respectively mounted on upper and lower surfaces of the stator core 3, and a wiring board 6.

[0008] The stator core 3 is made of a conductive material, and a bolt screw hole 7 is formed in the upper surface of the four corners. Also,
Bolt insertion holes 8 are formed at four corners of the upper flange 4 at positions corresponding to the bolt screw holes 7. Then, the wiring board 6 is arranged on the upper surface of the stator core 3 so as to face above the stator coil 2, and the upper flange 4 is further placed thereon.
Is mounted, and four bolts 9 are screwed into the bolt screw holes 7 through the bolt insertion holes 8, whereby the wiring board 6 and the upper flange 4 are attached to the stator core 3.

The wiring board 3 is composed of a board body 10 for wiring and connecting each stator coil 2 and a power line connector 11 to which a power line for supplying power to the stator coil 2 is connected. FIG. 2 is a longitudinal sectional view of a main part for describing the power line connector 11. Power line connector 1
An input terminal 12 for connecting a power line and a ground pin 13 are provided on the upper surface or the outer surface of 1.

Further, the board body 10 and the power line connector 11
Is formed integrally by covering the periphery of a circuit pattern (not shown) including the input terminal 12 and the ground pin 13 with a resin. Further, one end of a ground wire 14 is connected to the ground pin 13, and an annular plate 15 having conductivity is provided at the other end of the ground wire 14. The annular plate 15 is placed on the upper surface of the upper flange 4 so as to surround the bolt insertion hole 8, and when the bolt 9 is screwed into the bolt screw hole 7 through the center and the bolt insertion hole 8, the head of the bolt 9 The portion and the annular plate 15 come into contact with each other.

Therefore, the wiring board 6 and the upper flange 4 are attached to the stator core 3 with the bolts 9 as described above,
When any one of the bolts 9 is inserted into the center of the annular plate 15, all the stator coils 2 are electrically connected to the input terminals 12 of the power line connector 11, and power is supplied to these stator coils 2. In addition, the stator core 3 includes a bolt 9, an annular plate 15, and a ground wire 14.
Is connected to the ground pin 13. The input terminal 12 and the ground pin 13 of the power line connector 11 must be exposed to the outside as shown in FIG. 5 in order to connect the power line and perform the grounding operation. Power line connector 1
A notch 16 for fitting 1 is formed.

FIGS. 3 and 4 show a second embodiment of the present invention. Cylindrical portions 17 for inserting the bolts 9 are formed at both ends in the radial direction in the outer peripheral portion of the substrate body 10, and an annular base 18 having conductivity is mounted on one upper surface thereof. When the bolt 9 is inserted through the pedestal 18 and the cylindrical portion 17, the head of the bolt 9 comes into contact with the pedestal 18. In addition, the substrate body 10 includes:
A board pattern 19 for electrically connecting the pedestal 18 and the ground pin 13 of the power line connector 11 is provided. Further, bolt insertion holes 8 are formed in the upper flange 4 near both ends of a diagonal line orthogonal to the diameter connecting the cylindrical portions 19 of the substrate body 10.

In order to assemble the stator 1, the board body 1
Then, the bolt 9 is screwed into the bolt screw hole 7 through the pedestal 18 and the cylindrical portion 17 to join the substrate body 10 and the stator core 3. Next, the upper flange 4 is put on the upper part, and the bolt 9 inserted into the bolt insertion hole 8 is screwed into the bolt screw hole 7 as in the first embodiment, and the upper flange 4 is fixed to the stator core 3. .

In this state, the tip of the bolt 9 for fixing the wiring board 6 to the stator core 3 contacts the stator core 3 and the head contacts the pedestal 18, so that the stator core 3 is connected to the bolt 9, the pedestal 18 and the board pattern. 19 is electrically connected to the ground pin 13. Other structures are almost the same as those of the first embodiment, and therefore, the same portions are denoted by the same reference characters and description thereof is omitted.

[0015]

According to the first aspect of the present invention, the trouble of connecting the wiring board and the power line connector with the lead wires and the space therefor can be saved, so that the wiring process is greatly streamlined. At the same time, the motor is downsized. Further, since there is no seam between the wiring board and the power line connector, the waterproof performance is improved.

According to the second aspect of the present invention, when the wiring board is bolted to the stator core, the stator core and the ground pin are automatically electrically connected, so that the wiring of the motor is all one wiring board. The wiring work can be further streamlined.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a stator of an electric motor according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the above.

FIG. 3 is a perspective view of a wiring board of an electric motor according to a second embodiment of the present invention.

FIG. 4 is an exploded perspective view of a stator of an electric motor according to a second embodiment of the present invention.

FIG. 5 is a perspective view of an electric motor.

FIG. 6 is an exploded perspective view of a conventional motor stator.

FIG. 7 is a vertical cross-sectional view of a main part of the power line connector during mounting.

FIG. 8 is a longitudinal sectional view of a main part after the power line connector is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator 2 Stator coil 3 Stator core 4 Upper flange 5 Lower flange 6 Wiring board 7 Bolt insertion hole 8 Bolt insertion hole 9 Bolt 10 Board main body 11 Power line connector 12 Input terminal 13 Earth pin 14 Earth wire 15 Ring plate 16 Notch 17 Cylindrical Part 18 pedestal 19 board pattern

Claims (2)

[Claims] 1. A wiring board for an electric motor, wherein a power line connector is provided integrally with a board body for wiring and connecting a stator coil. 2. A board main body joined to a stator core via bolts, a bolt insertion pedestal contacting the bolt is formed, and a board pattern for conducting the pedestal and a ground pin of a power line connector is provided. The wiring board for an electric motor according to claim 1, wherein the stator core is electrically connected to a ground pin of a power line connector by joining the board body and the stator core with bolts.