JP2015186371A - Motor and motor manufacturing method - Google Patents

Abstract

A motor with improved electrical insulation characteristics and a method of manufacturing the motor are provided. A motor includes a stator coil 57, a terminal pin 60 installed on the stator coil 57, a printed circuit board 62 fixed to the terminal pin 60, a lead wire 64 drawn from the printed circuit board 62, and a terminal pin. 60, a printed circuit board 62, and a mold resin 66 provided in at least a part of a region where the lead wire 64 is in contact, and the lead wire 64 penetrates between the printed circuit board 62 and the stator coil 57. Then, it is drawn out of the mold resin 66. [Selection] Figure 3

Description

  The present invention relates to a motor and a method for manufacturing the motor.

  In the conventional motor stator connection and lead wire lead-out, in the case of an 8-pole 9-slot permanent magnet synchronous motor, the stator coil connection is as shown in FIG. 6, and on the substrate as shown in FIG. 7 and FIG. Will pass over the substrate for a long time. This portion is finally resin-molded, but the mold quality deteriorates during resin molding. In some cases, the lead wire may be exposed on the surface of the resin mold.

  On the other hand, for example, it is disclosed that the stator connection and the lead wire of the motor are drawn using a bus bar and drawn out by a connector terminal or a lead wire outside the motor (for example, see Patent Document 1).

JP 2009-131025 A

  However, there are many examples of using a printed circuit board in a small motor as in Patent Document 1, but depending on the connection, there is a possibility that the multilayered printed circuit board and the lead-out lead wire may hinder downsizing.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A motor according to this application example includes a stator coil, terminal pins installed on the stator coil, a printed circuit board fixed to the terminal pins, a lead wire drawn from the printed circuit board, A motor including a terminal pin, a mold resin provided in at least a part of a region where the printed circuit board and the lead wire are in contact with each other, the lead wire penetrating between the printed circuit board and the stator coil. It is drawn out of the mold resin.

  According to this application example, the lead wire can be wired on the lower surface of the printed circuit board. Thereby, since the lead wire does not come to the upper surface of the printed circuit board, the mold resin can be made thin and the filling property can be improved. As a result, the axial dimension of the motor is reduced (for the diameter of the lead wire), the filling quality of the upper surface mold resin is improved, and the electrical insulation characteristics of the motor are improved.

  Application Example 2 In the motor described in the application example, the lead wire and the printed board are electrically connected to each other by screws, crimp terminals, or soldering.

  According to this application example, providing a plurality of connection methods facilitates the wiring of the lead wires.

  Application Example 3 In the motor according to the application example described above, the lead wire is fixed to a side surface of the stator coil of the printed board with a holder.

  According to this application example, the lead wire can be bent easily. Moreover, the movement by the external force (filling of mold resin etc.) of a lead wire can be suppressed.

  Application Example 4 In the motor according to the application example described above, the lead wire is disposed near the stator coil between the printed board and the stator coil.

  According to this application example, the lead wire can be easily wired on the lower surface of the printed circuit board.

  Application Example 5 In the motor according to the application example described above, the lead wire is directly drawn outside the mold resin without a socket.

  According to this application example, space saving and size reduction are possible.

  Application Example 6 In the motor according to the application example described above, the lead wire penetrates between the plurality of stator coils and is drawn out of the mold resin.

  According to this application example, the lead wire can be easily pulled out of the mold resin.

  Application Example 7 In the motor according to the application example described above, the lead wire is a heat-resistant coated wire.

  According to this application example, heat resistance including the lead wire can be maintained.

  Application Example 8 A motor manufacturing method according to this application example includes a stator coil, a terminal pin installed on the stator coil, a printed circuit board fixed to the terminal pin, and a lead wire drawn from the printed circuit board. And a mold resin provided in a region where at least one of the printed circuit board, the terminal pin, and the lead wire is in contact with the printed circuit board and the stator coil. And is pulled out to the outside of the mold resin.

  According to this application example, the lead wire can be wired on the lower surface of the printed circuit board. Thereby, since the lead wire does not come to the upper surface of the printed circuit board, the mold resin can be made thin and the filling property can be improved. As a result, the axial dimension of the motor is reduced (for the diameter of the lead wire), the filling quality of the upper surface mold resin is improved, and the electrical insulation characteristics of the motor are improved.

Sectional drawing which shows the motor which concerns on this embodiment. The cross-sectional view which shows the stator which concerns on this embodiment. The longitudinal cross-sectional view which shows the stator which concerns on this embodiment. The top view which shows the wiring on the printed circuit board which concerns on this embodiment. Sectional drawing which shows the lead wire which concerns on this embodiment. The figure which shows the connection of the conventional stator coil. The top view which shows the wiring on the conventional printed circuit board. Sectional drawing which shows the wiring on the conventional printed circuit board.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings. Note that the drawings to be used are appropriately enlarged or reduced so that the part to be described can be recognized.

(motor)
FIG. 1 is a cross-sectional view showing a motor according to this embodiment.
As shown in FIG. 1, the motor 1 according to the present embodiment includes a housing 2, a rotating shaft 3, a stator 4, and a rotor (rotor) 5. The motor 1 is not particularly limited, and examples thereof include a servo motor and a stepping motor.

  Bearings 21 and 22 are provided on the upper wall and the bottom wall of the housing 2. The bearings 21 and 22 are rotatably supported by the rotary shaft 3. Alternatively, the rotor 5 is fixed to the rotating shaft 3 in the housing 2. The rotor 5 has a cylindrical shape, and includes a core 51 made of a soft magnetic material such as iron, and a permanent magnet 52 provided on the outer periphery of the core 51. A stator 4 is disposed around the rotor 5. The stator 4 has a cylindrical shape and includes a plurality of coil bobbins 56 arranged at predetermined intervals in the circumferential direction and a plurality of coil windings 41 wound around the coil bobbins 56. The coil bobbin 56 around which the coil winding 41 is wound is referred to as a stator coil 57.

  The permanent magnet 52 has an annular column shape. The permanent magnet 52 has a multipolar structure in which a plurality of magnetic poles are formed in the circumferential direction.

Next, an embodiment will be described using an 8-pole 9-slot permanent magnet type synchronous motor as an example.
FIG. 2 is a cross-sectional view showing the stator 4 according to this embodiment. The stator 4 shown in the figure shows a right-angle cross section (first quadrant) with respect to the rotor 5.
The coil winding 41 is wound around a coil bobbin 56 and is loaded on the core 51 as a stator coil 57 (FIG. 2 shows three of them).

FIG. 3 is a longitudinal sectional view showing the stator 4 according to this embodiment. The longitudinal sectional view of the stator 4 shown in the drawing shows a cross section parallel to the rotor 5.
The stator 4 includes a terminal pin 60 installed on the stator coil 57, a printed circuit board 62 fixed to the terminal pin 60, a lead wire 64 drawn from the printed circuit board 62, a terminal pin 60, a printed circuit board 62, and a lead wire. And a molding resin 66 provided in at least a part of a region in contact with 64.

  Each coil winding 41 is connected to the printed circuit board 62 through terminal pins 60 as shown in FIG. Although a method of connecting and outputting the coil windings 41 directly without using the printed circuit board 62 is also conceivable, there are 18 wires from the coil windings 41 and 3 lead wires 64, which are generally crowded. Is connected to the outside via the printed circuit board 62.

FIG. 4 is a plan view showing wiring on the printed circuit board 62 according to the present embodiment.
In the present embodiment, the lead wire 64 is disposed on the lower surface of the printed circuit board 62 and on the coil winding 41 side. The lead wire 64 penetrates between the printed circuit board 62 and the stator coil 57 (coil winding 41) and is drawn out of the mold resin 66. The external extraction portion 68 protects the lead wire 64 with a flexible resin or the like.

  The lead wires 64 and the printed circuit board 62 may be electrically connected by screws, crimp terminals, or soldering. According to this, the wiring of the lead wire 64 becomes easy by providing a plurality of connection methods.

  As shown in FIG. 4, the lead wire 64 may be fixed to the side surface of the stator coil 57 of the printed circuit board 62 with a holder 70. According to this, the lead wire 64 can be bent easily. Moreover, the movement by the external force (filling of the mold resin 66 etc.) of the lead wire 64 can be suppressed.

  The lead wire 64 may be disposed near the stator coil 57 between the printed circuit board 62 and the stator coil 57. According to this, the lead wire 64 can be easily wired on the lower surface of the printed circuit board 62.

FIG. 5 is a cross-sectional view showing the lead wire 64 according to the present embodiment.
The lead wire 64 may be directly drawn out of the mold resin 66 without using a socket. According to this, space saving and size reduction are possible.

  The lead wire 64 may penetrate between the plurality of stator coils 57 and be drawn out of the mold resin 66. According to this, it can be easily pulled out of the mold resin 66.

  The lead wire 64 may be a heat-resistant coated wire. According to this, heat resistance including the lead wire can be maintained. The type may be a Teflon (registered trademark) coated wire, a silicon resin coated wire, or the like.

Hereinafter, a method for manufacturing the motor 1 according to the present embodiment will be described.
As shown in FIG. 3, the method for manufacturing the motor 1 according to the present embodiment is a manufacturing method in which the lead wire 64 is inserted between the printed circuit board 62 and the stator coil 57 and drawn out of the mold resin 66. is there.

  The lead wire 64 and the printed circuit board 62 may be electrically connected by screws, crimp terminals, or soldering. According to this, the wiring of the lead wire 64 becomes easy by providing a plurality of connection methods.

  As shown in FIG. 4, the lead wire 64 may be fixed to the side surface of the stator coil 57 of the printed circuit board 62 with a holder 70. According to this, the lead wire 64 can be bent easily. Moreover, the movement by the external force (filling of the mold resin 66 etc.) of the lead wire 64 can be suppressed.

  The lead wire 64 may be disposed near the stator coil 57 between the printed circuit board 62 and the stator coil 57. According to this, the lead wire 64 can be easily wired on the lower surface of the printed circuit board 62.

  The lead wire 64 may be directly drawn out of the mold resin 66 without using a socket. According to this, space saving and size reduction are possible.

  The lead wire 64 may penetrate between the plurality of stator coils 57 and be drawn out of the mold resin 66. According to this, it can be easily pulled out of the mold resin 66.

  The lead wire 64 may be a heat-resistant coated wire. According to this, heat resistance including the lead wire can be maintained. The type may be a Teflon (registered trademark) coated wire, a silicon resin coated wire, or the like. Existing manufacturing methods can be used for other manufacturing methods.

  According to this embodiment, the lead wire 64 can be wired on the lower surface of the printed circuit board 62. Thereby, since the lead wire 64 does not come to the upper surface of the printed circuit board 62, the mold resin 66 can be made thin and the filling property can be improved. As a result, the axial dimension of the motor 1 is reduced (for the diameter of the lead wire 64), the filling quality of the upper surface of the mold resin 66 is improved, and the electrical insulation characteristics of the motor 1 are improved.

  As mentioned above, although the motor and the manufacturing method of the motor have been described based on the illustrated embodiment, the present invention is not limited to this, and the configuration of each part is an arbitrary configuration having the same function. Can be replaced. In addition, any other component may be added to the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Motor 2 ... Housing 3 ... Rotating shaft 4 ... Stator 5 ... Rotor 21, 22 ... Bearing 41 ... Coil winding 51 ... Core 52 ... Permanent magnet 56 ... Coil bobbin 57 ... Stator coil 60 ... Terminal pin 62 ... Printed circuit board 64 ... Lead wire 66 ... mold resin 68 ... external takeout part 70 ... holder.

Claims (8)

A stator coil, a terminal pin installed on the stator coil, a printed circuit board fixed to the terminal pin, a lead wire drawn out from the printed circuit board, and a region where the terminal pin, the printed circuit board and the lead wire are in contact with each other A motor provided with at least a part of the mold resin,
The motor, wherein the lead wire penetrates between the printed circuit board and the stator coil and is drawn out of the mold resin. The motor according to claim 1,
The motor, wherein the lead wire and the printed circuit board are electrically connected by screws, crimp terminals, or soldering. The motor according to claim 1 or 2,
The motor, wherein the lead wire is fixed to a side surface of the stator coil of the printed board with a holder. In the motor according to any one of claims 1 to 3,
The motor is characterized in that the lead wire is disposed near the stator coil between the printed circuit board and the stator coil. In the motor according to any one of claims 1 to 4,
The motor, wherein the lead wire is directly drawn out of the mold resin without a socket. In the motor according to any one of claims 1 to 5,
The motor, wherein the lead wire penetrates between the plurality of stator coils and is drawn out of the mold resin. In the motor according to any one of claims 1 to 6,
The motor is characterized in that the lead wire is a heat-resistant coated wire. At least one of a stator coil, a terminal pin installed in the stator coil, a printed circuit board fixed to the terminal pin, a lead wire drawn from the printed circuit board, the printed circuit board, the terminal pin, and the lead wire A method of manufacturing a motor comprising: a mold resin provided in a region where the
A method of manufacturing a motor, wherein the lead wire is passed between the printed circuit board and the stator coil and drawn out of the mold resin.

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