JPH04334938A - Motor - Google Patents

Abstract

PURPOSE:To secure windings by band-engaging the entire windings by using end wires of coils so as to prevent floating, disorder, etc., of the winding in a motor in which a stator core is formed of a split structure of an outer ring yoke and an inner ring pole and the coils are wound in series. CONSTITUTION:A plurality of spool posts 22 are integrally molded by insulating resin 13 with an inner ring pole 10 made of pole pieces 17, and a rotor 16 is inserted into the pole 10. After a rotor 16 is covered with an insulting cover 18, coils 30 are wound in parallel crosses between the posts 22, and so retained as to band-engage the wound coils 30 by the finishing end coils. The pole 10 is mounted on an outer ring yoke 5 by press-fitting to form a stator core 6. Thus, since the winding parts of the coils are retained by the end wires of the coils, the coils are secured, floating, disorder, etc., of the coil are eliminated, curable resin for securing the coils is eliminated, and a manufacturing cost can be reduced.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an electric motor in which an outer ring yoke portion and an inner ring magnetic pole portion are separated, a rotor is inserted into the 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. 7, in this type of electric motor, an inner ring magnetic pole part (not shown) provided with a plurality of winding frame columns 1 is inserted into a rotor 2, and an insulating cover is attached to the rotor. 2a, the coil 3 is wound in a protruding manner between the winding frame columns 1, and the coil 3 is fixed with a curable resin 3a. It is known that this inner ring magnetic pole part is fitted into the outer ring yoke part 4 (see, for example, Japanese Patent Application No. 1-246644).

0003

[Problems to be Solved by the Invention] In the conventional electric motor as described above, the coil 4 is fixed with a hardening resin 5 to prevent the coil 4 from floating, protruding, or being disturbed at the winding portion of the coil 4. There were problems in that it was troublesome and the production costs such as labor and material costs were high.

[0004] This invention was made to solve the above problem, and can prevent the coil from floating, disarranged, protruding, etc. in the winding portion without using a hardening resin, and can provide a cheaper electric motor. The purpose is to obtain.

[0005]

[Means for Solving the Problems] An electric motor according to the present invention includes 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. the formed stator core, an insulating part that covers the inner ring magnetic pole part of the stator iron core, and a first insulating part that is formed integrally with the insulating part and covers one end surface of the inner ring magnetic pole part and communicates with the center of the inner ring magnetic pole part. An insulating resin formed in a funnel shape having a rotating shaft through hole, and a winding frame column having a pin integrated with the insulating resin and protruding on the magnetic pole piece are provided, and a rotor is installed in the inner ring magnetic pole part. 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 the terminal is connected to the pin. In this stator, a coil is wound in a protruding manner between the slots, and the terminal wire of the coil is stretched around the wound coil with a band, and is then tied to the pin.

[0006] Furthermore, the shape of the strap is rectangular.

[0007] Also, the coil is wrapped with a band using the same coil material as the wound coil.

[0008]

[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 plurality of magnetic pole pieces having slots in the outer ring yoke portion; A funnel having an insulating part that covers the inner magnetic pole part of the stator core, and a first rotary shaft through hole that is formed integrally with the insulating part and covers one end surface of the inner ring 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 integrally with the insulating resin and protruding 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 end is hung on the pin is inserted between the slots. In a stator that is wound in a protruding manner,
After the terminal wire of the coil is stretched around the wound coil so as to be hung with a band, the wound portion of the coil is pressed by the terminal wire by being tied to the pin.

Furthermore, since the shape of the band is rectangular, the end wire can be banded over the entire coil wound in a protruding manner.

Furthermore, since the coil is banded using the same coil material as the wound coil, the amount of coil material can be reduced.

[0011]

【Example】

Example 1. Embodiment 1 of this invention is shown in FIGS. 1 to 5. In the figure, 5 is the outer ring yoke part, and the electric steel strip wound in a hoop shape is divided into the stator and rotor core, which will be described later, and punched out using a high-speed automatic press (not shown). At the same time, they are 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 pieces formed with slots 8 extending 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 pieces; 10 is the bridge and the magnetic pole piece 7;
For example, the plate thickness is 0.35 mm or 0.5 m.
The bridge 9 is an inner magnetic pole part on which iron core plates made of m are laminated, and the bridge 9
There is no problem with the shape of the width. 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. 13
is an insulating resin molded and fixed to one end face of the inner ring magnetic pole part 10, and is formed in the shape of a funnel, with a rectangular first rotating shaft through hole 15 provided at the tip. 1
Reference numeral 6 denotes a rotor provided within the inner ring magnetic pole portion 10, into which a rotating shaft 17 is fitted. 18 is an insulating cover,
The end ring 19, which is the conductor part of the rotor 16, is insulated from the outside and has a circular second rotary shaft through hole 20 on one side, which connects the inner ring magnetic pole. It is detachably attached to the other end surface of the section 10. 21 is a drain hole drilled in the insulating resin 13 and the insulating cover 18, and 22 is a winding frame pillar formed integrally with the insulating part 11 on both ends of the magnetic pole piece 7, and located at the tip of the magnetic pole piece. A first winding frame column 23 is made of 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 described later at its tip, and the first winding frame column is not provided with a pin. and a second winding frame column 24 formed lower than 23, and each of the winding frame columns 23, 24 is arranged at a predetermined position on the inner ring magnetic pole section 10. 26 is the second winding frame column 2
The coil is brought into contact with the convex portion extending from the apex of the triangle 4 toward the center of the inner ring magnetic pole portion (10). 27 is a pin body, and a pin 28 is inserted into the tip of the first winding frame column 23.
and a common part 29, and is electrically connected to a main coil and an auxiliary coil, which will be described later. Numeral 30 denotes a coil, which is a magnet made of a self-bonding material and 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 wire. 34a is the winding start portion of the main coil 32;
35 is the winding end of the main coil 32, 36 is the auxiliary coil 34
37 is the winding end of the auxiliary coil 34; 39 is an insulating wedge that insulates the coil 30 and the outer ring yoke 5;
It is fitted into the gap between the 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, 42
is a frame that forms this outer casing, and has a flange 43 on the peripheral edge.
has been established. 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.
For example, the connection is made by electric resistance welding (not shown). 5
6 is 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 power cord 56, and its peripheral edge is curled outward to prevent the power cord 56 from being damaged by the edge. Reference numeral 65 denotes a band hanging part, which is attached to the coil 30.
Before the terminal wire is tied to the pin 28, it is strapped onto the auxiliary coil 34 so as to cross the wound coil portion.

[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, the coil 30 is connected to a predetermined pin body 27 by winding it with a flyer type winding machine (not shown) capable of multi-axis control, and a shape is formed between the slots 8 so as to go around the rotor 16. and wrap the end of the winding into another predetermined pin body 2.
7, a main coil 32 is formed at the bottom. and,
Similarly, the auxiliary coil 34 is formed by winding the coil 30 in a protruding manner between the slots 8 so as to be located above the main coil 32. Furthermore, the terminal wire of this auxiliary coil made of the same material is connected to the auxiliary coil 3 as shown in FIG.
4. After the top is stretched as if it were a band, it is tied to the pin 28. In this case, as shown in FIG. 5, the end portion 37 of the auxiliary coil 34 is connected to the end portion 35 of the main coil 32, forming a common portion 29. By dip-soldering the pin body 27 to which the winding start part 34a of the main coil 32 and the winding start part 36 of the auxiliary coil 34 are connected, the main coil 32 and the auxiliary coil 34 are connected to the pin 2.
8 becomes conductive. In addition, since the common part is only connected and not 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 29 is dip soldered, the winding end part 34a of the main coil 32 and the winding end part 37 of the auxiliary coil are simultaneously electrically connected to the pin 29, and the outer ring yoke is heated with a heating medium (not shown). The inner ring magnetic pole part 10 is press-fitted into the inner ring magnetic pole part 5, and the outer ring yoke part 5 and the inner ring magnetic pole part 10 are reliably fitted by cooling contraction of the outer ring yoke part 5 through the fitting recess 6a, and the stator core 6 is formed. Furthermore, as shown in FIG.
9 is installed. Next, the coil 30 is heated to melt the adhesive layer of the magnet wire made of a self-adhesive material to fix the coils 30, and the bearing 40 and the E-shaped retaining ring 40 are attached to the rotating shaft 17.
a, press-fit the stator core 6 into the frame 42, insert the protruding piece 47 of the bracket 46 into the caulking recess 45 of the frame 42, cover the frame 42 from above, and insert the protruding piece 47 into the frame 42. are bent and coupled so as to sandwich the flange 43 of the frame 42. On the other hand, a capacitor 53, a thermal fuse 54, etc. are molded into a predetermined shape on a lead wire 55 and attached to the terminal block 50. Then, the bracket 46 is attached by inserting the leg portion 51 into the through hole 49 of the bracket 46. In this case, the legs 51 of the terminal block 50
The winding frame column 22 portion of the inner ring magnetic pole portion 10 is inserted, positioned and fixed, and an electrode is applied to the portion where the tip of the lead wire 55 and the pin body 27 overlap at right angles, and spot welding is performed to join them. . 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. After the power cord 56 is pulled out from the protrusion, the cover 58 is finally fitted onto the bracket 46.

Example 2. In addition, as shown in FIG. 6, by making the banding shape of the terminal wire of the auxiliary coil 34 into a rectangular shape made of a rhombus, for example, the banding can be applied evenly to the entire protruding part, and the auxiliary coil 34 can be fixed more securely. Can be done.

[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 ring magnetic pole part of the stator core, and a first rotating part that covers one end surface of the inner ring magnetic pole part and communicates with the center of the inner ring magnetic pole part, which is formed integrally with the insulating part. An insulating resin formed in a funnel shape having a shaft through hole 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 mounted in the inner ring magnetic pole part. A funnel-shaped insulating cover having a second rotary shaft through-hole that is inserted and communicates with the first rotary shaft through-hole is attached to the other end surface of the inner ring magnetic pole part, and the terminal is tied to the pin. In a stator made by winding a coil in a protruding manner between the slots, the terminal wire of the coil is stretched around the wound coil with a band, and then the wire becomes tangled with the pin, causing the coil to float or become disordered. is held down with a band, eliminating the need for hardening resin or the like, which simplifies the work process and reduces manufacturing costs.

[0015] Furthermore, since the shape of the strap is rectangular, the band can be hung over the entire protruding portion, and the coil can be fixed more reliably.

Furthermore, since the band is made of the same coil material as the wound coil, the number of setups for the coil and winding process can be reduced, and the manufacturing cost can be further reduced.

[Brief explanation of drawings]

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

FIG. 2 is a perspective view of an inner magnetic pole portion showing Embodiment 1 of the present invention.

FIG. 3 is an assembled perspective view showing Embodiment 1 of the present invention.

FIG. 4 shows a first embodiment of the present invention and is a perspective view of mounting a wedge.

FIG. 5 shows a first embodiment of the present invention and is a coil connection diagram of a motor.

FIG. 6 shows a second embodiment of the present invention, and is a perspective view of an inner ring magnetic pole part.

FIG. 7 is a perspective view showing a conventional electric motor.

[Explanation of symbols]

5 Outer ring yoke part 6 Stator core 7 Magnetic pole piece 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 28 pin 30 Coil

Claims (3)

[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. An electric motor characterized in that, in a stator formed by rotating, the terminal wire of the coil is stretched around the wound coil so as to be hung with a band, and then hung around the pin. 2. The electric motor according to claim 1, wherein the shape of the strap hook is rectangular. 3. The electric motor according to claim 2, wherein the coil is banded using the same coil material as the wound coil.