JPH04340343A - Electric motor - Google Patents

Abstract

PURPOSE:To provide an electric motor that can reduce the amount of coils and has high productivity by fixing a connecting place for a lead, with regard to a series motor with a coil in a double cross and with a stator core in half- split structure of an outer ring yoke unit and an inner ring polar unit. CONSTITUTION:A plurality of spool poles 22 are formed as a whole from an insulating resin 13 in an inner ring pole unit 10, which consists of pole pieces 7. A rotor 16 is inserted into the inner ring pole unit 10 and is covered with an insulating cover 18. After a winding start pin 28 for a main coil 32, a winding start pin 28a for an auxiliary coil 34, and a common unit pin 29 are set at the spool pole 22, the main coil 32 and the auxiliary coil 34 are wound among slots 8 while each lead 55 is connected to their corresponding pin 28, 28a or 29. Then, the inner ring pole unit 10 is inserted by pressure into an outer ring yoke unit 5. In this case, since a pin to be connected for a lead is fixedly determined, the mounting place is uniformed for electronic parts, and thereby standardization can be obtained as an electric motor. Moreover, with a slot the direction of winding of a coil can be changed, so the coil materials can be reduced.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor in which a rotor is inserted into a stator core divided into an outer ring yoke portion and an inner ring magnetic pole portion, and a coil is wound around the inner ring magnetic pole portion.

0002

2. Description of the Related Art Conventionally, as shown in FIG. 8, in this type of electric motor, a stator 3 is formed by laminating a plurality of iron plates 2 each having a slot 1 formed in the inner periphery thereof. And this stator 3
It is known that the coil 4 is wound between the slots 1 by an insert method (for example, in
(See Publication No. 1576).

0003

[Problems to be Solved by the Invention] In the conventional electric motor as described above, the coil 4 is inserted into the slot 1 due to the insert method.
Since the circumferential length of the coil 4 is increased due to the winding between the coils, the amount of coils used increases, which is disadvantageous in terms of characteristics.

Furthermore, when changing the rotation direction of the rotor (not shown), it is necessary to change the winding direction between the slots 1 of the coil 4, which makes changing the winding direction troublesome and There was a problem in that the exit position of the coil 4 terminals was not fixed, making it impossible to standardize the motor.

Further, the coil 4 protrudes from the slot 1 and the coil ends come loose, which requires processing time such as forming, coil binding, and varnishing, making it difficult to mechanize.

The present invention was made to solve the above problems, and the coil circumference is shortened to reduce the amount of coils used, resulting in good characteristics, and the rotation direction of the rotor can be easily changed. Furthermore, it is an object of the present invention to provide an electric motor in which the exit position of the coil can be fixed, the coil does not protrude from the slot, the coil ends do not come apart, and post-processing is easy and can be mechanized.

[0007]

[Means for Solving the Problems] This invention has been made to solve the above problems, and consists of an outer ring yoke portion forming an outer ring portion, and a plurality of magnetic pole pieces having slots in the outer ring yoke portion. A stator core formed by fitting the inner ring magnetic pole part, an insulating part that covers the inner ring magnetic pole part of this stator core, and an inner ring magnetic pole that is molded integrally with the insulating part and covers one end face of the inner ring magnetic pole part. A funnel-shaped insulating resin having a first rotating shaft through-hole communicating with the center of the part, and a winding frame column having a pin and protruding integrally with the insulating resin on the magnetic pole piece are provided. , a rotor is inserted into the inner ring magnetic pole part and the first
A funnel-shaped insulating cover having a second rotary shaft through-hole communicating with the rotary shaft through-hole is attached to the other end surface of the inner ring magnetic pole part, and a coil whose terminal is caught on the pin is inserted between the slots. A stator that is wound in a protruding shape, a through hole for a winding frame pillar in the outer casing in which this stator is installed, and an electronic component that is connected with a pin to the winding frame pillar that protrudes from the through hole. After installing a terminal block with a power cord and connecting a power cord to this terminal block and fitting a cover to the outer casing, set the coil winding start and winding end to the specified pins among the above pins. After connecting one side of the coil to the winding start pin and winding it between predetermined slots, the other side of the coil is connected to the winding end pin through another slot connected to this wound slot. It is connected.

Further, the winding direction of the coil between the slots is changed by wiring from the winding start pin to a predetermined winding slot after passing through another slot adjacent to the winding start pin.

[0009]

[Operation] In the present invention, a stator core is formed by fitting an outer ring yoke portion forming an outer ring portion, and an inner ring magnetic pole portion having a slot in the outer ring yoke portion and comprising a plurality of magnetic pole pieces; A funnel having an insulating part that covers the inner magnetic pole part of the stator core, and a first rotating shaft through hole that is formed integrally with the insulating part and covers one end surface of the inner magnetic pole part and communicates with the center of the inner ring magnetic pole part. an insulating resin formed into a shape, and a winding frame column having a pin integrated with the insulating resin and projecting on the magnetic pole piece, and inserting a rotor into the inner ring magnetic pole part.
A funnel-shaped insulating cover having a second rotary shaft through-hole communicating with the rotary shaft through-hole is attached to the other end surface of the inner ring magnetic pole part, and a coil whose terminal is caught on the pin is inserted between the slots. A stator that is wound in a protruding shape, a through hole for a winding frame pillar in the outer casing in which this stator is installed, and an electronic component that is connected with a pin to the winding frame pillar that protrudes from the through hole. After installing a terminal block with a power cord and connecting a power cord to this terminal block and fitting a cover to the outer casing, set the coil winding start and winding end to the specified pins among the above pins. After connecting one side of the coil to the winding start pin and winding it between predetermined slots, the other side of the coil is connected to the winding end pin through another slot connected to this wound slot. Once connected, the positions of the winding start and winding ends are fixed with pins.

[0010] Furthermore, since the winding direction between the slots of the coil is changed by wiring from the winding start pin to the predetermined winding slot after passing through another slot adjacent to the coil, the winding direction can be changed over a short distance. and can be done with a small amount of coils.

[0011]

【Example】

Example 1. 1 to 7 are diagrams showing an embodiment of the present invention. In the diagrams, reference numeral 5 denotes an outer ring yoke portion, in which an electric steel strip wound in a hoop shape is pressed by a high-speed automatic press (not shown). The stator and rotor cores are separated and punched out, and simultaneously laminated to a predetermined thickness by caulking to form the outer ring portion of the stator core 6. Reference numeral 6a denotes a fitting recess provided in the inner wall of the outer ring yoke portion, and its opposing side wall surfaces (not shown) are formed so as to coincide with the center line of the inner ring magnetic pole portion, which will be described later. Reference numeral 7 designates a plurality of magnetic pole portions formed in slots 8 and projecting toward the center from the inner periphery of the outer ring yoke portion 5, the tips of which are fitted into the fitting recesses 6a of the outer ring yoke portion 5. 9 is a bridge connecting the tips of each of the plurality of magnetic pole parts, 10 is composed of the bridge and the magnetic pole part 7, and the plate thickness is, for example, 0.35 mm or 0.5 mm.
There is no problem with the shape of the width of the bridge 9 even if it is pressed out using a press machine (not shown), for example. Reference numeral 11 denotes an insulating part provided on the stator by, for example, injection molding, and is molded and fixed to the inside of the slot 8 and the end face of the inner ring magnetic pole part 10. Reference numeral 13 denotes an insulating resin molded and fixed to one end surface of the inner ring magnetic pole portion 10, which is shaped like a funnel, and has a rectangular first rotating shaft through hole 15 at its tip. Reference numeral 16 denotes a rotor provided within the inner ring magnetic pole portion 10, into which a rotating shaft 17 is fitted. Reference numeral 18 denotes an insulating cover, which is individually molded into a funnel shape, so that the end ring 19, which is the conductor part of the rotor 16, is insulated from the outside, and has a circular second rotating shaft through hole 20 on one side. Then, it is detachably attached to the other end face of the inner ring magnetic pole part 10. 21
22 is a drain hole formed in the insulating resin 13 and the insulating cover 18, and 22 is a drain hole formed in the insulating resin 13 and the insulating cover 18;
The winding frame pillar is formed at both ends on the top, and is located at the tip of the magnetic pole part, and is a triangular prism with an apex on the center side of the inner ring magnetic pole part 10, and serves as a winding guide, and has a pin, which will be described later, at the tip. The first winding frame pillar 23 and the first winding frame pillar 2 without a pin are provided.
3, and each of the winding frame pillars 23 and 24 is arranged at a predetermined position on the inner ring magnetic pole part 10. Reference numeral 26 denotes a convex portion extending from the apex of the triangle of the second winding frame column 24 toward the center of the inner ring magnetic pole portion 10, with which the coil comes into contact. Reference numeral 27 denotes a pin body, which includes a main coil winding start pin 28, an auxiliary coil winding start pin 28a, and a common part pin 2 inserted into the tip of the first winding frame column 23.
9, and is electrically connected to a main coil and an auxiliary coil, which will be described later. 29a is a common lead pin, and 30 is a coil, which is composed of a main coil 32 which has a high space factor in the slot 8 and serves as an internal coil 31, and an auxiliary coil 34 which has a low space factor in the slot 8 and serves as an external coil 33. Made of adhesive magnet wire. 34a is a winding start part of the main coil 32, 34b is a winding end part of the main coil 32, 36 is a winding start part of the auxiliary coil 34, 37 is a winding end part of the auxiliary coil 34, and 35 is an outlet part of the main coil 32. Winding end part 34b
The winding end portion 37 of the auxiliary coil 34 is gathered together. 39
is an insulating wedge that insulates the coil 30 and the outer ring yoke portion 5; the outer ring yoke portion 5 and the coil 3
It is fitted into the gap between 0 and 0. Reference numeral 40 denotes a bearing mounted on the rotating shaft 17, and is made of, for example, a ball bearing. 41 is the outer casing, 4
2 is a frame forming this outer casing, and a flange 4 is provided at the peripheral end.
There are 3. Reference numeral 45 denotes a caulking recess provided in this flange, into which a plurality of convex pieces, which will be described later, are inserted. A bracket 46 has a flange 43 at its peripheral end, and a plurality of protrusions 47 extending from the flange. Reference numeral 49 denotes a through hole of the winding frame pillar formed in the bracket 44, through which the winding frame pillar 22 is projected when the electric motor 6 is assembled. Reference numeral 50 designates a terminal block having a leg portion 51 inserted into this through hole, which is made of, for example, an insulating resin, and the leg portion 51 has an opening so that the pin body 27 can protrude to a predetermined length. 51a is a cord groove; 52 is an electronic component disposed on the terminal block 50, such as a capacitor 53, a thermal fuse 54, etc.; a lead wire 55 connected in a predetermined shape has its tip connected to the pin body 27; It is arranged perpendicular to the Note that when the terminal block 50 is disposed on the outer casing 41, the lead wire 55 and the pin body 27 are formed so as to be in contact with each other, and are connected by, for example, electric resistance welding (not shown). Reference numeral 56 denotes a power cord, the tip of which is stripped to a predetermined length for connection. Reference numeral 57 is a putty, for example, a two-component type that can be cured at room temperature, and is further added with ultraviolet ray curability to prevent sagging, and the terminal block 50 is molded. Reference numeral 58 denotes a bottomed cover with an opening on one side, which is made of metal, for example, and is attached to the bracket 24 in order to protect the terminal block 50 and the molded part 59, which is the hardened part of the putty 57. Reference numeral 62 denotes a protrusion provided on the side wall of the cover 58, which is used as an outlet for the electric cord 56, and its peripheral edge is curled outward to prevent the power cord 56 from being damaged by the edge.

[0012] In the electric motor configured as described above,
In its assembly, the rotor 16 is housed in the inner ring magnetic pole part 10 provided with the winding frame column 22 having the insulating resin 13 and the pin body 27, with the rotating shaft 17 inserted through the first rotating shaft through hole 15. , the insulating cover 18 is inserted through the rotating shaft 17, and the end ring 19 is insulated. Next, as shown in FIG. 4, the main coil is connected to the main coil winding start pin 28 by a flyer type winding machine (not shown) capable of multi-axis control, and the slot 8
The main coil 32 is formed at the lower part by winding the coil with a gap between the coils and the winding end portion 35b being tied to the common portion pin 29. Next, the coil 30 is connected by being tied to the auxiliary coil winding start pin 28a, and connected to another slot 8 connected to the slot 8 around which the main coil 32 is wound so as to surround the rotor 16. The auxiliary coil 34 is formed on the main coil 32 by winding it in a protruding shape, and the end of the winding is tied to the common part pin 29. The common part pin 29 is connected to the common lead pin 29a by the coil 30. The main coil 32 and the auxiliary coil 34 are electrically connected to each pin 28, 28a by dip soldering the pin bodies 28, 28a to which the winding start portion 34a of the main coil 32 and the winding start portion 36 of the auxiliary coil 34 are connected. be done. It should be noted that since the common portion is only broken and not electrically conductive, the interphase withstand voltage between the main coil 32 and the auxiliary coil 34 is tested by applying a predetermined voltage between the pins 28 and checking the withstand voltage. After that, the common part pin 29 is dip soldered, and the winding end part 34a of the main coil and the winding end part 3 of the auxiliary coil are soldered.
7 is simultaneously connected to the pin 29, and a heating medium (not shown) is connected to the pin 29.
The inner ring magnetic pole part 10 is press-fitted into the heated outer ring yoke 5, and the outer ring yoke part 5 and the inner ring magnetic pole part 10 are securely fitted by cooling contraction of the yoke part 5 through the fitting recess 6a. Then, the stator core 6 is formed. Furthermore, Figure 4
As shown in FIG. 3, a wedge 39 is attached to insulate between the coil 30 and the yoke portion 5. Next, the coils 30 are heated to melt the adhesive layer of the magnet wire made of self-adhesive material, and the coils 30 are fixed together, and the bearing 40 and the E-type retaining ring 40a are attached to the rotating shaft 17, and then the stator core 6 frame 4
2 and press-fit the convex piece 47 of the bracket 46 into the frame 42.
The bracket 46 is inserted into the caulking recess 45 of the
is placed over the frame 42 from above, and the convex piece 47 is bent so as to sandwich the flange 43 of the frame 42 and joined together. On the other hand, a capacitor 53, a thermal fuse 54, etc. are attached to the terminal block 50 by forming a lead wire 55 into a predetermined shape. Then, attach the leg portion 51 to the through hole 49 of the bracket 46.
It is installed by inserting it into the In this case, the terminal block 50
The winding frame column 22 portion of the inner ring magnetic pole portion 10 is inserted into the leg portion 51 of the inner ring magnetic pole portion 10, and is positioned and fixed.
8, 28a, and 29a are joined by spot welding by applying an electrode to the overlapping portion of the parts 8, 28a, and 29a. Next, a test welder (not shown) is brought into contact with the pin body 27, and a voltage is applied to perform a motor performance test for predetermined items. Then, a power cord 56 is placed on the terminal block 50, and its tip is temporarily fixed so as to be perpendicular to the pin body 27, and then joined by spot welding. Further, the terminal block 50 is filled with putty 57 to insulate the charging exposed parts such as the lead wires 55 and to fix and mold the electronic components and the power cord 56. Power cord 56 from the protrusion
After the cover 58 is pulled outward, the cover 58 is finally fitted onto the bracket 46.

Example 2. To change the rotation direction of the rotor 16, use the auxiliary coil winding start pin 28 as shown in FIG.
a, the auxiliary coil winding start pin 28a is passed through the slot A70 adjacent to the winding start pin 28a, and after so-called discard winding, the wire is wired to a predetermined winding slot. is wound in the opposite direction. As a result, the tension on the coil 30 caused by changing the winding direction is alleviated, and the coil 30 does not break.

[0014]

[Effects of the Invention] As explained above, the present invention is formed by fitting an outer ring yoke portion forming an outer ring portion and an inner ring magnetic pole portion having a slot in the outer ring yoke portion and comprising a plurality of magnetic pole pieces. A stator core, an insulating part that covers the inner magnetic pole part of the stator core, and a first rotating shaft penetrating part that is molded integrally with the insulating part and covers one end surface of the inner magnetic pole part and communicates with the center of the inner ring magnetic pole part. A funnel-shaped insulating resin having a mouth and a winding frame column having a pin integrally with the insulating resin and projecting on the magnetic pole piece are provided, and a rotor is inserted into the inner ring magnetic pole. A funnel-shaped insulating cover having a second rotary shaft through hole communicating with the first rotary shaft through hole is attached to the other end surface of the inner ring magnetic pole part, and a coil whose terminal end is entangled with the pin is attached. A stator is formed by winding the stator in a protruding manner between the slots, and a through hole for a winding frame pillar is provided in the outer casing in which this stator is installed, and a pin is connected to the winding frame pillar that protrudes from the through hole. A terminal block with electronic components is installed, a power cord is connected to this terminal block, and a cover is fitted to the outer casing. After connecting one side of the coil to the pin for the winding start part and winding it between the predetermined slots, the other side of the coil is connected to the winding end part through another slot connected to this wound slot. By connecting to the terminal pin, the pin positions at the start and end of the coil are fixed, and the lead connection position can be standardized, so the mounting position of electronic components and the wiring method of the lead wire can be fixed, making it easier to assemble. can be easily automated and manufacturing costs can be reduced.

[0015] Furthermore, since the winding direction between the slots of the coil is changed by wiring from the winding start pin to the predetermined winding slot after passing through another slot adjacent to the coil, the rotation direction of the motor can be changed to a short coil. It can be done easily and effortlessly, making it easier to assemble.

[Brief explanation of drawings]

FIG. 1 is an assembled perspective view showing a first embodiment of the present invention.

FIG. 2 is an attached perspective view of a terminal block showing Embodiment 1 of the present invention.

FIG. 3 is a plan view of a terminal block showing Embodiment 1 of the present invention.

FIG. 4 is a winding diagram of a coil showing Embodiment 1 of the present invention.

FIG. 5 shows a first embodiment of the present invention and is a perspective view of mounting a wedge.

FIG. 6 shows a first embodiment of the present invention and is a coil connection diagram of a motor.

FIG. 7 shows a second embodiment of the present invention and is a winding diagram of a coil.

FIG. 8 is a plan view showing a conventional electric motor.

[Explanation of symbols]

5 Outer ring yoke part 6 Stator core 7 Magnetic pole part 8 slots 10 Inner ring magnetic pole part 11 Insulation section 13 Insulating resin 15 First rotating shaft through hole 16 Rotor 18 Insulation cover 20 Second rotating shaft through hole 22 Winding frame pillar 27 Pin body 28 Main coil winding start pin 28a Auxiliary coil winding start pin 30 Coil 34a beginning of volume 34b End of volume 36　　　Volume beginning part 37 End of volume 41 Outer casing 49 Through hole 50 Terminal block 52 Electronic parts 56 Power cord 58 Cover 70 Other slots

Claims (2)

[Claims] 1. An outer ring yoke portion forming an outer ring portion, a stator core formed by having slots in the outer ring yoke portion and fitting an inner ring magnetic pole portion consisting of a plurality of magnetic pole pieces, and the stator. A funnel-shaped insulating part that covers the inner magnetic pole part of the iron core, and a first rotary shaft through hole that is formed integrally with the insulating part and covers one end face of the inner magnetic pole part and communicates with the center of the inner ring magnetic pole part. and a winding frame column having a pin integrated with the insulating resin and projecting on the magnetic pole piece, and inserting a rotor into the inner ring magnetic pole part, and inserting the rotor into the first rotating shaft through-hole. A funnel-shaped insulating cover having a second rotary shaft through-hole communicating with the inner ring is attached to the other end face of the inner ring magnetic pole part, and a coil whose terminal end is attached to the pin is wound in a protruding manner between the slots. A stator is formed by rotating a stator, a through hole for a winding frame pillar is provided in the outer casing in which this stator is installed, and a terminal block having an electronic component connected to a pin is provided on the winding frame pillar that protrudes from the through hole. After installing and connecting the power cord to this terminal block, and fitting the cover to the outer casing, set the winding start and end of the coil to the predetermined pins among the above pins,
After connecting one side of the above coil to the winding start pin and winding it between predetermined slots, connect the other side of the coil to the above winding end pin via another slot connected to this wound slot. An electric motor characterized by: [Claim 2] The first aspect of the present invention is characterized in that the winding direction of the coil between the slots is changed by wiring from the winding start pin to a predetermined winding slot after passing through another slot adjacent to the winding start pin. Electric motor described in section.