JP2550501B2 - Electric motor - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric motor in which a yoke portion and a stator are divided, a rotary shaft is inserted into the stator, and a coil is wound around the stator. .

[Conventional technology]

Conventionally, as a motor of this type, as shown in FIG. 5, a stator (3) is formed by laminating a plurality of iron plates (2) having slots (1) formed inside. It is known that the coil (4) is wound between the slots (1) of the stator (3) by an inserter method (for example, see Japanese Utility Model Laid-Open No. 56-141576).

FIG. 6 is a perspective view of the stator (3) shown in FIG. 5, and FIG. 7 is a perspective view showing a state in which a coil (4) is wound around the stator (3) of FIG.

In FIG. 7, the coil (4) penetrates vertically in the slot (1) and is wound in a circular shape, and the stator (4a) does not overlap with the coil (4a) which penetrates another slot near the coil end. It is formed to be curved in the outer peripheral direction.
(4b) is a string that prevents the coil (4) from coming loose.

[Problems to be Solved by the Invention]

In the conventional electric motor as described above, since the coil (4) is wound between the slots (1) by the inserter method, the peripheral length of the coil (4) is increased, so that the amount of used coil is increased and the characteristics are improved. Will be at a disadvantage. In addition, the coil (4) sticks out from the slot (1) or is curved in the outer peripheral direction of the stator near the coil end, so that the coil (4) end is dislocated, and processing time such as molding, coil binding and varnish treatment is required. Therefore, there was a problem that it was difficult to mechanize.

Further, even if a self-fusing type coil is used, the coil itself tends to come apart, so that the fusing force alone is not sufficient, and eventually it was necessary to bind and fix it with a string.

The present invention has been made to solve the above problems, and has a short coil circumference, reduced amount of used coil, and good characteristics, and the post-processing is easy without the coil protruding from the slot or the coil end falling apart. The purpose is to obtain an electric motor that can be mechanized by.

[Means for solving the problem]

An electric motor according to the present invention includes a yoke portion forming an outer ring portion, and a plurality of magnetic poles concentrically formed with the yoke portion so as to project a slot toward the center from the inner circumference of the yoke portion and are coupled to each other in a ring shape on the center side. A stator composed of a portion, an insulating portion formed in a funnel shape on one end surface of the stator and provided with a rotation shaft through hole in the center, and a rotor inserted in the stator and having a rotation shaft in the center An insulating cover mounted on the other end surface of the stator to insulate an end ring, which is a conductor portion of the rotor, from the outside, a self-fusing coil wound between the slots, and the magnetic pole portion. A winding frame column which is formed on the outer end side of the magnetic pole and extends in the direction of the rotation axis from the magnetic pole portion and has a pin connected to the coil on the tip side thereof; and the stator, the rotor, the coil and the winding frame column. And an outer casing for The portion corresponding to the frame pillar by providing a pin through holes causes protrude the pin to the outer housing outside,
A terminal block having a hole through which the pin can be inserted is provided at a position corresponding to the through hole for the pin outside the outer casing, and the coil is connected to the slot of the stator before mounting the yoke portion. The rotor and the insulating cover are contained in a wound shape between the bobbin pillars, and only the coils wound only in the same direction are wound in each slot.

[Action]

According to the present invention, the coil is wound in a barbed manner between the bobbin columns in a state in which the rotor is contained in the slot of the stator before mounting the yoke part, and moreover, the coil is wound only in the same direction in one slot. Since only the coil to be rotated is positioned, the winding of the coil will be extremely firm in the open slot, and the insulating part and insulating cover that insulate the rotor will also be fixed by winding the coil. Keep high. Therefore, the winding of the coil is not likely to be broken or separated, the winding amount of the coil is reduced, and the self-bonding coil is fused in a state where there is little separation. Since the pins of the bobbin pillar are projected outside the outer casing, when assembling the outer housing, attention is paid to the reel pillar protruding from the stator to the periphery of the rotating shaft, and the pin is positioned and projected at the center. This prevents the rotating shaft from being inadvertently touched during assembly of the outer casing and causing the positional relationship between the rotating shaft and the coil to shift, so post processing such as connecting a terminal block to this pin becomes easy. Further, it is possible to connect an electronic component or the like to the pin outside the outer casing regardless of the constituent members inside the outer casing.

Also, by winding the coil in the shape of a cross between the magnetic poles, the coil is formed in the two-dimensional direction, preventing the coil from spreading and preventing the coil from protruding by the winding frame column, so self-bonding The coil is securely fixed by the fusion force of the flexible coil.

〔Example〕

1 and 2 are views showing an embodiment of the present invention, in which (5) is a yoke portion, and an electric steel strip wound in a hoop shape is subjected to high-speed automatic pressing (not shown). A stator and a rotor core, which will be described later, are divided and punched, and at the same time, they are laminated by calking to a predetermined thickness to form an outer ring portion of the electric motor (6). (6a) is a notch portion provided on the inner wall of the yoke portion, and (7) is a stator provided concentrically with the yoke portion (5), which is a slot () from the inner circumference of the yoke portion (5) toward the center. 8) has a plurality of magnetic pole portions (9) protrudingly formed, and is formed by laminating to a predetermined thickness. (10) is an insulating resin provided on this stator by, for example, injection molding, and is molded and fixed to the inside of the slot (8) and the end face of the stator (7). Reference numeral (11) is a winding frame pillar simultaneously molded with this insulating resin, which is a triangular pillar located at the tip of the magnetic pole portion and having an apex on the side of the stator (7), and serves as a winding guide. Although not shown, one end face of the stator (7) is integrally formed with the insulating resin (10) in a funnel shape, and an insulating portion having a rotary shaft through hole is provided in the center. There is. (12) is a pin body, which is composed of a pin (12a) and a common part (12b) inserted at the tip of the winding column, and is electrically connected to a main coil and an auxiliary coil described later. The rotor is provided in the stator (7), and the rotary shaft (14) is fitted in the center of the rotor. (15)
Is an insulating cover which is mounted on the stator (7) by penetrating the rotating shaft (14), and is independently formed into a funnel shape, whereby an end ring (16) which is a conductor portion of the rotor (13). Is insulated from the outside. Reference numeral (17) is a coil, which is composed of a main coil (18) and an auxiliary coil (19), and is composed of, for example, a magnet wire having a self-bonding property. (18a) is the winding start portion of the main coil (18), (18b) is the winding end portion of the main coil (18), (19a) is the winding start portion of the auxiliary coil (19), and (19b) is the auxiliary coil (19). ), A winding end (20) is an insulating wedge that insulates the coil (17) from the yoke (5), and is fitted in a gap between the yoke (5) and the coil (17). Be worn. Reference numeral (21) is a bearing mounted on the rotary shaft (14), and is, for example, a ball bearing. (22) is an outer casing, which comprises a frame (23) and a bracket (24). (25) is a pin through hole provided in this bracket, through which the bottle body (12) is projected. Reference numeral (26) is a terminal block having a leg portion (27) which is inserted into the pin through hole, and is made of, for example, an insulating resin, and the leg portion (27) has a pin body (12) projected to a predetermined length. There is an opening provided. (28) is a code groove provided at the peripheral end of the terminal block, and (29) is an electronic component arranged on the terminal block (26), such as a capacitor (29a) or a thermal fuse (29b). The lead wire (30) connected in a predetermined shape is arranged so that its tip is orthogonal to the pin body (12). Reference numeral (31) is a power cord, the tip of which is pierced for connection with a predetermined size. (32) is a putty, which is, for example, a two-part curable material that can be cured at room temperature, and has UV curability to prevent sagging. Reference numeral (33) is a cover, which is made of metal, for example, and is attached to the bracket (24) to protect the terminal block (26) and the putty (32) hardened portion.

In the electric motor configured as described above, the assembly is performed by inserting the rotating shaft (14) into the rotating shaft through hole in the stator (7) provided with the insulating resin (10) and the pin body (12). Rotor (13) is stored and insulation cover (15)
Is inserted into the rotary shaft (14) to insulate the end ring (16). Next, by connecting the coil (17) to the predetermined pin body (12) by twisting it with a flyer type winding machine (not shown) capable of multi-axis control, the rotor (13) is rotated. After the winding between the slots (8) is wound, the winding end portion is twisted to another predetermined pin body (12), and the main coil (18) is formed in the lower portion. Then, similarly, the coil (17) is wound in a wound shape between the slots (8) so as to be located above the main coil (18), and the coil (17) is twisted to form the auxiliary coil (19). At that time, the reel pillar (1
1) Prevent the coil from protruding near the coil end. Further, since the coils (17) and (18) are wound in a substantially flat shape in a mutually skewed manner, the coils themselves are not in the unwinding direction. Therefore, the coils (17) (18) continue to maintain their original shape unless they are affected by an external force. Further, in the case of a two-pole motor, since it is wound in a zigzag shape, the winding frame column is an isosceles triangle whose apex is approximately 90 degrees in order to secure the winding property, and the apex is arranged toward the magnetic pole part 9. Is the best. In this case, as shown in FIG. 4, the auxiliary coil (19)
The end of winding (19b) is the end of the main coil (18) (18b)
Is overlapped and connected to the barb, and the common part (12b)
Is formed. The coil bodies (18) and (19) are formed by dip-soldering the pin body (12) to which the winding start portion (18a) of the main coil (18) and the winding start portion (19a) of the auxiliary coil (19) are connected. And a pin (12a) are electrically connected to each other. Since the common part is only entangled and is not electrically connected, a predetermined voltage is applied between the pins (12a) to check the withstand pressure, so that the main coil (18) and the auxiliary coil (19) are separated from each other. Interphase breakdown voltage inspection is performed. Thereafter, the common portion (12b) is dip-soldered, the stator (7) is press-fitted through the notch portion (6a) of the yoke portion (5), and as shown in FIG. A wedge (20) is fitted to insulate between the yoke (5) and the yoke (5).
Next, the coil (17) is heated to melt the fusion layer of the self-adhesive magnet wire, and the coils (17) are fixed to each other.
Since the coils (17) and (18) do not act in the separating direction as described above, the coils (17) and (18) are fixed to each other only by the welding force without binding with a cord or varnish treatment. And the rotating shaft (14)
After mounting the bearing (21) and the E-type retaining ring (not shown) on the, the yoke portion (5) is press-fitted into the frame (23), and the bracket (24) is joined by caulking or screws. On the other hand, lead wires (30) such as capacitors (29a) and thermal fuses (29b) are molded into a predetermined shape and mounted on the terminal block (26). And the bracket (24) to the leg (27)
It is installed by inserting into the through hole (25) for pins.
In this case, the winding column (11) of the stator (7) is inserted into the leg (27) of the terminal block (26), positioned and fixed, and the tip of the lead wire (30) and the pin body (12) are connected. Are joined by spot welding by applying an electrode to a portion where the and are crossed at right angles. Next, since the pin body (12) is arranged so as to project from the terminal block of the bracket (24) and (26), it is easy to make contact with an inspection contactor (not shown). Motor performance inspection can be performed. Usually, inspection through a power lead wire requires a step of connecting a lead terminal and an inspection contact, which is time-consuming, but it can be used by utilizing the fact that the pin (12) projects at a predetermined position as described above. If so, automatic inspection can be performed easily. Since the inspection can be performed before connecting the power cord (31), the motor quality such as motor start-up and input can be checked early in the process, and even if a defect should occur, It can be easily disassembled and repaired. Also,
By bringing the end of the power cord (31) close to the protruding pin (12), connection work can be easily performed by spot welding or the like. Then, the power supply lead (31) is arranged on the terminal block (26), and the tip portion thereof is temporarily fixed so as to be orthogonal to the pin body (12) and joined by spot welding. Further, the putty (32) is filled on the terminal block (26) to insulate the charge exposed portion such as the lead wire (30) and fix the power supply lead (31). Finally, the cover (33) is attached to the bracket (24).

〔The invention's effect〕

According to the present invention, the coil is hung over the slots of the stator before mounting the yoke portion in a state in which the rotor is included in a winding manner between the bobbin columns, and moreover, only one slot has the same direction. Since only the coil to be wound is positioned, the winding of the coil will be extremely firm in the open slot, and the rotor will also be temporarily fixed by this winding of the coil, making it easy to manufacture. . Since the coil can be wound up to a position near the rotation axis by the insulating cover, the coil can be wound in a linear and compact shape in a compact manner. Since the insulating cover and the insulating portion insulate the rotor at the end surface of the stator, the coil can be directly wound on the stator and the insulating cover so as to cover the rotor, and the coil end can be lowered. . By directly winding the coil, the insulating cover can be fixed so as not to come off by the coil, and high insulation is maintained.

That is, the coil is less likely to be wound or dislocated, the winding amount of the coil is reduced, and the characteristics are improved. At the same time, since the coil is firmly wound around the stator, it is possible to eliminate the need for molding in the outer casing for fixing the coil, and the self-bonding coil can be reliably fused. Also, since the pins of the bobbin pillar project outside the outer casing, when assembling the outer casing, attention is paid to the reel pillar protruding around the rotating shaft from the stator, and it is positioned and projected at the center. It is possible to effectively prevent the rotating shaft from being inadvertently touched when the outer casing is assembled and the positional relationship between the rotating shaft and the coil is displaced, and post processing such as connecting a terminal block to a pin is easy. Therefore, it is possible to obtain an effect that manufacturing by mechanization is extremely easy.

Then, in the self-bonding coil, since the terminal block having the hole for allowing the pin to be inserted at the position corresponding to the pin penetrating hole is provided outside the outer casing, the coil end of the coil wound around the stator is The loosening is further reduced, and even if vibration occurs during use of the electric motor, the coil does not loosen due to the vibration,
Since the winding state of the coil around the stator becomes stronger, and the electronic components can be connected to the pins outside the outer casing regardless of the constituent members inside the outer casing. The effect is that the connection is easy and mechanization can be easily achieved.

Further, a stator having a plurality of magnetic pole portions protruding from the inner circumference of the yoke portion forming the outer ring portion to form a slot toward the center, and a rotor inserted in the stator to form a gap between the magnetic pole portions. A coil wound around the coil and a winding frame column provided in the magnetic pole part that also serves as an insulating part, and the coil is formed by a self-bonding coil, so that the coil is directly wound around the stator and the coil circumference is increased. Is short, the amount of coil used can be reduced, and the coil can be prevented from protruding or coming loose, and varnishing and binding with a string are not required, and the assembly process can be automated.

[Brief description of drawings]

1 and 2 are assembly perspective views showing an embodiment of the present invention, and FIG. 3 is a perspective view of mounting a wedge, and FIG.
FIG. 5 is a coil connection diagram of the electric motor, FIG. 5 is a plan view of a stator showing a conventional electric motor, FIG. 6 is a perspective view of the same, and FIG. 7 is a perspective view of the electric motor after winding. In addition, (5) is a yoke part, (7) is a stator, (8) is a slot, (9) is a magnetic pole part, (11) is a winding column, (12) is a pin, (13) is a rotor, (17) is a coil, (22) is an outer casing,
(25) is a through hole for pins, (26) is a terminal block, (29) is an electronic component, (30) is a lead wire, (31) is a power cord, (33)
Is the cover.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Naotoshi Kakigai 1-3 Komabacho, Nakatsugawa, Gifu Prefecture Mitsubishi Electric Corporation Nakatsugawa Works (72) Inventor Yoshio Kasuga 8-1-1 Tsukaguchihonmachi, Amagasaki, Hyogo No. Mitsubishi Electric Co., Ltd. Production Technology Research Laboratory (72) Inventor Kenichi Higashi 8-1-1 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture Mitsubishi Electric Co., Ltd. Production Technology Research Laboratory (72) Inventor Yuji Nakahara 8 Tsukaguchi Honcho, Amagasaki City Hyogo Prefecture 1-1-1 Mitsubishi Electric Co., Ltd. Production Technology Laboratory (72) Inventor Masahiro Taguchi 8-1-1 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture Mitsubishi Electric Co., Ltd. Production Technology Laboratory (56) Reference JP-A-63- 299733 (JP, A) JP 64-81642 (JP, A) JP 58-3550 (JP, A)

Claims (1)

(57) [Claims] 1. A yoke portion forming an outer ring portion and a plurality of magnetic pole portions concentrically formed with the yoke portion so as to form a slot from the inner circumference of the yoke portion toward the center and projectingly connected to each other in a ring shape on the center side. A stator constituted, an insulating portion formed in a funnel shape on one end surface of the stator and provided with a rotation shaft through hole in the center, a rotor having a rotation shaft in the center inserted into the stator, An insulating cover mounted on the other end surface of the stator to insulate the end ring, which is a conductor portion of the rotor, from the outside, a self-fusing coil wound between the slots, and an outer portion of the magnetic pole portion. A winding frame column that is formed on the end side and extends from the magnetic pole portion in the direction of the rotation axis and has a pin connected to the coil on the tip side thereof; the stator, the rotor;
An outer casing including a coil and a winding column is provided, and a pin through hole is provided at a portion of the outer casing corresponding to the winding column so that the pin projects outside the outer casing. A terminal block having a hole through which the pin can be inserted is provided at a position corresponding to the through hole for the pin, and the coil is insulated from the rotor with respect to the slot of the stator before mounting the yoke portion. An electric motor characterized in that a coil is wound between the above-mentioned bobbin pillars in a state of enclosing a cover, and each slot is wound only with a coil wound only in the same direction.