JP3716046B2 - Substrate built-in motor - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a substrate built-in motor in which a substrate for connecting between windings is attached to a stator.
[0002]
[Prior art]
In order to improve workability and reliability when connecting the winding terminals, a winding connection board is often provided adjacent to the stator. A brushless DC motor in which a frame, which is an example of a substrate built-in motor to which the substrate is attached, is molded by premixing will be described with reference to FIGS. FIG. 3 is a partial sectional side view of a conventional brushless DC motor. FIG. 4 is an enlarged side view of an attachment portion between the stator and the substrate in FIG. FIG. 5 is an enlarged view of a connection portion between the terminal of the winding and the substrate in FIG.
[0003]
In FIG. 3, the brushless DC motor 11 includes a cylindrical mold frame 15 formed by molding a stator 13 and a substrate 14 with a premix 12, and a permanent magnet 16. A rotor 17 housed in the housing, a bearing 18 that supports the rotor 17 and allows the rotor 17 to rotate, and a ball housing 19 that houses the bearing 18 and is attached to the opening of the mold frame 15. It is configured.
[0004]
The stator 13 includes a laminated core 20 and a plurality of windings 22 wound around the laminated core 20 via a core insulating material 21, and a substrate 14 is attached adjacent to the stator 13. . The rotor 17 includes a shaft 23, a yoke 24 fixed to the outer periphery of the shaft 23, and a permanent magnet 16 fixed to the outer periphery of the yoke 24.
[0005]
4 and 5, a protrusion 14 a is provided at the end of the substrate 14. A land 25 is provided on the protrusion 14 and is connected to the pattern 26. Then, the winding terminal 22a is wound around the protrusion 14a, and the winding terminal 22a and the land 25 are connected, so that the pattern 26 and the winding 22 are electrically connected.
[0006]
A magnetic sensitive element 27 such as a position detecting Hall IC is mounted on the substrate 14 in order to detect the magnetic pole position of the rotor 17. The magnetic sensing element 27 generates a voltage in response to the magnetism of the permanent magnet 16 attached to the rotor 17 and detects the magnetic pole position of the rotor 17. In addition, a holder 28 is attached to the substrate 14 so as to cover the magnetic sensitive element 27 in order to protect the magnetic sensitive element 27 from the pressure at the time of molding.
[0007]
[Problems to be solved by the invention]
As described above, when soldering the end of the winding in the motor with a built-in board to the board, there is a method in which a protrusion is provided at the end of the board and the winding is wound around the protrusion and soldered. However, it is necessary to extend the end of the winding to the end of the board, so that the extended winding, so-called jumper wire is disconnected by an external force or the like, or the jumper wire hangs down and contacts the laminated core or the like. There is a possibility of short circuit.
[0008]
In addition, when a land, which is a connection point between the winding terminal and the board pattern, is provided on the side surface of the stator of the board, it is difficult to perform soldering work if the land is arranged at the center of the board. It was necessary to arrange at the end.
[0009]
[Means for Solving the Problems]
Therefore, according to the present invention, a horizontal bar extending parallel to the axial direction and a vertical bar extending perpendicular to the axial direction are formed in a cross shape, and one end of the horizontal bar is fixed. A cross pin fixed to a child, wound around the horizontal bar so that a distance between the winding end of the winding and the winding is the shortest, and provided corresponding to the number of windings;
A board having holes corresponding to the position and number of the cross pins, a pattern for connecting windings disposed on one surface, and a soldered land connected to the pattern around the hole; With
Towards a surface pattern is provided for the winding connections of the substrate to the stator side, and insert the other end of the cross pin into the hole of the substrate to said vertical rod comes into contact with the land, horizontal A motor with a built-in board, wherein the solder is attached to the land of the board by heating the other end of the bar to electrically connect the cross pin and the pattern of the board;
Alternatively, the present invention provides a motor with a built-in substrate, wherein a metal substrate having a metal as a base material is used for the substrate, and an inner peripheral portion of the hole is covered with an insulating material.
[0010]
[Action]
A winding end is wound around a horizontal bar having one end attached to the stator and soldered to electrically connect the winding and the cross pin. Then, the pattern surface of the substrate is directed to the stator side, and the hole of the substrate is inserted from the other end of the horizontal bar. When the pattern surface of the substrate comes into contact with the vertical bar of the cross pin, the mounting position of the substrate is determined. Then, the other end of the horizontal bar protruding from the surface opposite to the pattern surface of the substrate is heated with a soldering iron or the like. This heat is transferred from the horizontal bar to the land of the pattern in contact with the vertical bar through the vertical bar, melting the solder adhering to the land and electrically connecting the land and the vertical bar. The Thereby, the winding and the pattern of the substrate are electrically connected.
[0011]
【Example】
As an embodiment of the present invention, a stator having a metal substrate using metal as a base material will be described with reference to FIGS. FIG. 1 is a partial side sectional view of a stator according to the present invention. FIG. 2 is an enlarged cross-sectional view of the board mounting portion in FIG.
[0012]
1 and 2, the stator 1 includes a laminated core 20, a plurality of windings 3 wound around the laminated core 20 via a core insulating material 2, and a substrate, as in a conventional substrate built-in motor. It consists of This substrate uses a metal substrate 4. The metal substrate 4 is made of a metal plate 6 such as aluminum as a base material. The metal plate 6 is covered with a substrate insulating material 7 in order to electrically insulate the metal plate 6. By using the metal substrate 4 as the substrate, the substrate strength is improved and the warpage of the substrate is reduced. That is, it is possible to prevent pattern disconnection, peeling, and the like.
[0013]
A pattern (not shown) for connecting the windings is wired on one surface of the metal substrate 4. The metal substrate 4 is provided with holes 4a corresponding to the position and number of cross pins described later. A land 10 is provided around the hole 4a around the winding connection pattern surface, and is connected to the winding connection pattern. Further, a pin insulating material 8 is provided on the inner periphery of the hole 4a so that the metal plate and the cross pin do not contact when the cross pin is inserted into the hole 4a.
[0014]
In addition, in order to determine the connection between the winding 3 and the winding contact pattern wired on the metal substrate 4 and the mounting position of the metal substrate 4, cross pins 5 are provided corresponding to the number of windings. Yes. The cross pin 5 is formed by combining a horizontal bar 5a extending parallel to the axial direction of the shaft and a vertical bar 5b extending perpendicular to the axial direction in a cross shape.
[0015]
Then, one end of the horizontal bar 5 a of the cross pin 5 is attached and fixed to the core insulating material 2 covering the stator 1. Next, the winding terminal 3a is wound around the horizontal bar 5a and soldered, whereby the winding 3 and the cross pin 5 are electrically connected. At this time, by winding around the position of the horizontal bar 5a having the shortest distance from the winding 3, the connecting wire of the winding 3 can be shortened to prevent the winding from being cut.
[0016]
Then, the hole 4a of the metal substrate 4 is inserted from the other end side of the horizontal bar 5a, with the surface of the metal substrate 4 on which the winding connection pattern is wired facing the stator 1 side. Then, when the pattern surface for winding connection of the metal substrate 4 contacts the vertical bar 5b of the cross pin 5, the mounting position of the metal substrate 4 is determined. At this time, the other end of the horizontal bar 5a is projected from the surface opposite to the winding connection pattern surface of the metal substrate 4 by a predetermined length. Then, by heating the other end of the protruding horizontal bar with a soldering iron 9 or the like, this heat is transferred from the horizontal bar 5a through the vertical bar 5b to a land 10 having a pattern in contact with the vertical bar. , The solder adhering to the land 10 is melted, and the land 10 and the vertical bar 5b are electrically connected. That is, the winding 3 and the pattern of the metal substrate 4 are electrically connected.
[0017]
In the present embodiment, the substrate built-in type motor provided with the metal substrate has been described. However, the same effect can be obtained for a substrate built-in type motor provided with a paper phenol substrate, a glass epoxy substrate, and the like. At this time, the pin insulating material 8 which insulates the inner peripheral surface of the hole 4a is not necessary.
[0018]
【The invention's effect】
According to the present invention, the pattern disposed on the stator side of the substrate and the winding can be easily connected, and the mounting position of the substrate can be easily determined.
[0019]
[Brief description of the drawings]
FIG. 1 is a partial side sectional view of a stator according to the present invention.
FIG. 2 is an enlarged cross-sectional view of a substrate attachment portion in FIG.
FIG. 3 is a partial side sectional view of a conventional brushless DC motor.
4 is an enlarged side view of an attachment portion between a stator and a substrate in FIG. 3;
5 is an enlarged view of a connection portion between a terminal of a winding and a substrate in FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 13 ... Stator 2 ... Core insulating material 3 ... Winding 3a ... Winding terminal 4 ... Metal substrate 5 ... Cross pin 5a ... Horizontal bar 5b ... Vertical bar 6 ... Metal plate 7 ... Substrate insulating material 8 ... Pin insulating material 9 ... Soldering iron 10 ... Land 11 ... Brushless DC motor 12 ... Premix 14 ... Substrate 15 ... Mold frame

Claims (2)

In the motor with a built-in board in which the board for connecting the windings to the stator is attached,
A horizontal bar extending parallel to the axial direction and a vertical bar extending perpendicular to the axial direction are formed in a cross shape, and one end of the horizontal bar is fixed to a stator, and the winding A winding pin is wound around the horizontal bar so that the distance to the winding is the shortest, and a cross pin provided corresponding to the number of windings;
A board having holes corresponding to the position and number of the cross pins, a pattern for connecting windings disposed on one surface, and a soldered land connected to the pattern around the hole; With
Towards a surface pattern is provided for the winding connections of the substrate to the stator side, and insert the other end of the cross pin into the hole of the substrate to said vertical rod comes into contact with the land, horizontal A substrate built-in motor, wherein the other end of the rod is heated to melt the solder adhered to the land of the substrate and to electrically connect the cross pin and the substrate pattern.   2. The substrate built-in motor according to claim 1, wherein a metal substrate based on metal is used as the substrate, and an inner peripheral portion of the hole is covered with an insulating material.

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