JPH11275813A - Electric motor - Google Patents

Abstract

(57) [Problem] To stabilize the quality of a stator of a motor to be molded by simplifying a power supply circuit and a signal circuit on a substrate, reducing cost by reducing the substrate, and improving the assemblability. And improve it. SOLUTION: A stator of an electric motor, a rotation detecting device for detecting a position of a magnet attached to a rotating shaft rotating inside the stator, and a first substrate to which a lead terminal of the stator is connected are joined. And a pedestal provided with a connector to be connected to the outside and a connection member of the rotation detecting device fixed to the connector and joined to the first substrate, except for a portion provided with the connection member. A terminal board fixed to the stator by a mold; and a second board mounted with a rotation detection device fixed to the terminal block provided with the connection member and electrically connected to the connection member. Things.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling structure of a component having a rotation detecting device for an electric motor having a rotation detecting device for detecting rotation of a rotor and molding a stator.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional motor stator mounted on a board having a conventional circuit for detecting rotation and a circuit for power supply. FIG. 8 shows a stator of the electric motor in which the stator shown in FIG. 7 is molded. In a conventional motor stator,
As shown in FIG. 7, a power supply circuit and a signal circuit are formed on a substrate 22, and both circuits are connected to an external circuit via one connector 21. However, the rotation detection sensor (Hall IC) 10 and other electronic components 1
Although it is necessary to mount 1 or the like, it is difficult to include in the mold together with the stator 7 because it is weak against heat and pressure during molding.

For this reason, as shown in FIG. 8, the circuit board 2 is mounted so that the stator 7 can be mounted after being molded.
Generally, a structure in which a part of the mold 2 is put out of the outer periphery of the mold section 9 is generally used.

[0004]

As described above, in the conventional electric motor, after the stator 7 is molded, the electronic components are mounted thereon, which makes assembly difficult. In addition, since the substrate 22 is provided so that all of the electronic components can be mounted from the outer periphery of the mold portion 9, a large substrate 22 must be used, which has been a constraint on cost reduction.

The present invention simplifies a power supply circuit and a signal circuit on a substrate for a stator of an electric motor to be molded, thereby reducing costs by reducing the size of the substrate, and stabilizing and improving quality by improving assemblability. The purpose is to plan.

[0006]

According to the present invention, there is provided an electric motor comprising: a stator of the electric motor; a rotation detecting device for detecting a position of a magnet attached to a rotating shaft rotating inside the stator; It has a connector to which a first substrate to which a lead terminal is connected and which is connected to the outside, and a pedestal provided with a connection member of a rotation detecting device to which the connector is fixed and which is connected to the first substrate. A terminal block fixed to the stator by molding except for a portion provided with the connection member; and a rotation detection device fixed to the terminal block provided at the portion provided with the connection member and electrically connected to the connection member. And a second substrate on which is mounted.

[0007] In addition, a housing is attached to the terminal block to position the electronic component and to which the second substrate on which the rotation detecting device is mounted is fixed.

Further, the electronic component is positioned, the second substrate on which the rotation detecting device is mounted is fixed, and a housing having an engagement portion with the stator is formed when the stator is molded. It is provided with an engaging portion and an engaging portion that engages.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of a terminal block and a stator of an electric motor according to Embodiment 1 of the present invention. In the figure, 1 is a substrate which is a first substrate, 2
Is an opening for connection with a pin 6 which is a connection member formed on the substrate 1, 3 is a connector connected to an external circuit, 4 is an opening for mounting the pin 6, 5 is a pedestal for housing the connector 3, Reference numeral 7 denotes a stator of the electric motor.

[0010] The connector 3 is joined to the board 1 by soldering and fixed to the pedestal 5. The pins 6 electrically connected to the rotation detecting unit are hit on the pedestal 5 and the pins 1 and the substrate 1 joined to the connector 3 are joined by soldering, so that the connector 3 and the pins 6 are electrically connected. This is called a terminal block, and is attached to the stator 7.

Next, a lead terminal (not shown) wound around the stator 7 is electrically connected to the board 1 to which the connector 3 is connected. After that, the lead terminal wound around the pin 6 and the stator 7 molds the stator 7 electrically connected to the connector 3.

FIG. 2 shows the stator shown in FIG. 1 with a mold. In the figure, reference numeral 8 denotes a terminal block that is partially outside the outer periphery of the mold portion 9.

FIG. 3 is a diagram showing details of the connection between the terminal block and the rotation detecting device. In the figure, a substrate 13 of a rotation detecting device, which is a second substrate on which a Hall IC 10 and other electronic components 11 and the like are mounted, is mounted on a terminal block 8 that is outside the outer periphery of a mold portion 9 by mechanically connecting the substrate 13 of the rotation detecting device. A hook 14 for locking is provided for securement, and the hook 14 is mechanically fixed by inserting the hook 14 into the mounting opening 12 provided on the substrate 13 of the rotation detecting device. After fixing, the board 13 of the rotation detecting device and the pins 6 coming out of the pedestal of the terminal block 8 are joined by soldering, so that the connector 3 is electrically connected to the pins 6 of the terminal block via the board 1.

FIG. 6 shows an electric motor to which the stator according to the first embodiment is applied. As shown in the figure, a Hall IC 10 provided on a substrate 13 of a rotation detecting device joined to a terminal block 8 detects the rotation of a magnet 20 mounted on a rotating shaft 19.

Embodiment 2 Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a diagram showing details of the connection between the terminal block and the rotation detection device. In the figure, the substrate 13 of the rotation detecting device is mounted on a housing 16 having a function of enabling electronic components such as the Hall IC 10 and the capacitor 11 to be positioned on the substrate 13 of the rotation detecting device.
Further, a hook 14 for locking is provided on the terminal block 8 which appears outside the outer periphery of the mold portion 8, and the hook 14 is mechanically fixed by being inserted into a mounting opening 15 provided in the housing 16.

As in the first embodiment, after fixing, the substrate 13 of the rotation detecting device and the pin 6
To the connector 3 by soldering the terminal block 8 to the connector 3.
Are electrically connected to the pins 6 via the substrate 1.

According to the above embodiment, the housing 1
6, the electronic components such as the Hall IC 10 can be positioned on the substrate 13 of the rotation detecting device, the mounting of the electronic components such as the Hall IC 10 performed after molding of the stator is facilitated, and the assemblability and quality can be improved. .

Embodiment 3 Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a diagram showing details of the connection between the terminal block and the rotation detecting device. In the figure, the substrate 13 of the rotation detecting device is mounted on a housing 16 having a function of enabling electronic components such as the Hall IC 10 and the capacitor 11 to be positioned on the substrate 13 of the rotation detecting device.
In addition, a hook 17 for engaging, which is an engaging portion, is provided in the housing 16 and is fixed by being inserted into an engaging portion 18 formed when the stator 7 is molded.

As in the first embodiment, after being mechanically fixed, the substrate 13 of the rotation detecting device and the pedestal 5 of the terminal block 8 are fixed.
By joining the pins 6 by soldering, the pins 3 of the terminal block 8 are electrically connected to the connector 3 via the board 1.

[0020]

According to the electric motor of the present invention, the rotation detecting device for detecting the position of the magnet attached to the rotating shaft and the first substrate to which the lead terminal of the stator is connected are connected and connected to the outside. And a pedestal on which the connector is fixed and on which a connection member of the rotation detecting device joined to the first substrate is provided, and is fixed to the stator by molding except for the portion provided with the connection member. And a second board mounted with a rotation detection device that is fixed to the terminal block where the connection member is provided and is electrically connected to the connection member. This facilitates mounting of electronic components after molding, improves assemblability and quality, and minimizes the number of substrates used, thereby reducing costs.

In addition, since the electronic component is positioned and the housing to which the second substrate on which the rotation detecting device is mounted is fixed is provided, the reliability of detection by the rotation detecting device is improved.

Further, the electronic component is positioned, the second substrate on which the rotation detecting device is mounted is fixed, and a housing having an engagement portion with the stator is formed when the stator is molded. The provision of the engaging portion and the engaging portion that engages with each other facilitates the mold of the mold and improves the productivity.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a terminal block and a stator of an electric motor according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing a stator of the electric motor on which the electric motor is molded according to the first embodiment of the present invention;

FIG. 3 is a diagram illustrating a configuration of a motor rotation detection device according to the first embodiment of the present invention;

FIG. 4 is a diagram showing a configuration of a motor rotation detection device according to a second embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a motor rotation detection device according to a third embodiment of the present invention.

FIG. 6 is a diagram showing an electric motor of the present invention.

FIG. 7 is a view showing a stator of a conventional general electric motor.

FIG. 8 is a diagram showing a stator of a conventional general-molded electric motor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Substrate, 2 Connection opening 3, Connector, 4 Mounting opening, 5 pedestals, 6 pins, 7 stators, 8
Terminal block, 9 molded part, 10 Hall IC, 11 electronic parts, 12 mounting opening, 13 substrate of rotation detecting device, 14 hooks, 15 hook engaging part, 16
Housing, 17 hooks, 18 hooks, 19
Rotating shaft, 20 magnets.

Continued on the front page (72) Inventor Togo Yamazaki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Takashi Matsunaga 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. In company

Claims (3)

[Claims] 1. A stator for an electric motor, a rotation detecting device for detecting a position of a magnet attached to a rotating shaft rotating inside the stator, and a first substrate to which a lead terminal of the stator is connected. And a pedestal provided with a connection member of the rotation detecting device fixed to the first substrate and connected to the first substrate, wherein the connection member is provided. Mounting a terminal block fixed to the stator by molding except for a portion where the connection member is provided, and the rotation detection device fixed to the terminal block where the connection member is provided and electrically connected to the connection member. An electric motor comprising: a second substrate that is provided. 2. The electronic device according to claim 1, further comprising a housing attached to the terminal block, for positioning an electronic component, and fixing the second substrate on which the rotation detecting device is mounted. Electric motor. 3. A housing for positioning an electronic component, fixing the second substrate on which the rotation detecting device is mounted, and having a housing having an engagement portion with the stator, and formed at the time of molding the stator. The electric motor according to claim 1, further comprising: an engaging portion that engages with an engaging portion of the housing.