JPH03203542A - Motor - Google Patents

Abstract

PURPOSE:To save the molding material of spool pole by forming the spool pole having pins, projected integrally with insulating resin from a pole piece, of a plurality of spool poles having different overall length. CONSTITUTION:A spool pole 22 is disposed at the end of a pole piece 7 and serves as a winding guide. The spool pole 22 comprises a first spool pole 23 having a pin 28 at the end thereof and a second spool pole 24 lower than the first pole 23 and provided with no pin, where the spool poles 23, 24 are arranged alternately at predetermined positions in an inner ring pole section 10. A coil 30 is entangled about a pin body 27, wound around a rotor 11 between slots 8 and then the end-of-winding is wrapped around another pin body 27 thus forming a main coil 32. In similar manner, the coil 30 is wound between the slots 8 so that it is disposed above the main coil 32, and then it is wrapped to formed an auxiliary coil 34. Since the spool pole is formed of a plurality of spool poles having different overall length, molding material can be saved and an E-type stop ring for securing a bearing can be mounted easily onto the rotor.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides an electric motor in which a rotor is inserted into a stator core that is 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. It is related to.

[Conventional technology]

Conventionally, in this type of electric motor, as shown in FIGS. 15 and 16, an insulating resin is applied to the outer wall of a stator (2) provided with a plurality of magnetic pole pieces (1) protruding from the outer periphery. Integrally with this insulating resin, winding frame columns (3) are arranged in the vertical direction in the magnetic pole piece (1) at the same pitch and in the same shape, and the rotor (4
) is inserted into the stator (2), and then the coil (4a) is wound between the magnetic pole pieces fl1 in a protruding manner (see, for example, Japanese Utility Model Application No. 1-76975).

[Problem to be solved by the invention]

In the conventional electric motor as described above, the entire length of the winding frame columns is all the same, requiring a large number of molding phases, it is difficult to remove from the mold during molding, and the bearing (4) inserted into the rotor (4) is difficult to remove from the mold. There was a problem in that it was difficult to fit an E-shaped retaining ring (not shown) for fixation onto the rotor (4) because the winding frame column (3) was an obstacle.

This invention was made to solve the problem,
To obtain an electric motor which uses less molding material for a winding frame column and which facilitates attachment of an E-shaped retaining ring to a rotor.

[Means to solve the problem]

The electric motor according to the present invention includes: an outer ring yoke portion forming an outer ring portion; a stator core formed by having a slot in the outer ring yoke portion and fitting an inner ring magnetic pole portion consisting of a plurality of magnetic pole pieces; A funnel-shaped insulating part that covers the inner ring 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 face of the inner ring 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 protruding on the magnetic pole piece, and inserting a rotor into the inner ring magnetic pole part to rotate the first rotating shaft. A funnel-shaped insulating cover having a second rotary shaft through-hole that communicates with the through-hole is attached to the other end face of the inner magnetic pole part, and a coil whose terminal end is hung in the bottle is protruded between the slots. In this stator, the winding frame column is composed of a plurality of winding frame columns having different overall lengths.

[Effect]

In this 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 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 in the shape of a shape, and a winding frame column having a bottle integrated with the insulating resin and projecting on the magnetic pole piece,
A rotor is inserted into the inner ring magnetic pole piece, and a funnel-shaped insulating cover having a second rotating shaft through hole that communicates with the first rotating shaft through hole is attached to the other end surface of the inner ring magnetic pole piece; In a stator in which a coil whose terminal end is hung on the pin is wound in a protruding manner between the slots, since the winding frame pillar is composed of a plurality of pieces having different overall lengths, the amount of molding material for the winding frame pillar is reduced. .

〔Example〕

Figures 1 to 14 are diagrams showing an embodiment of the present invention. In the diagram, (5) is an outer ring yoke portion, where an electric steel strip wound in a hoop shape is pressed into a high-speed automatic press (not shown). The stator core and the rotor core, which will be described later, are separated and punched, and simultaneously laminated to a predetermined thickness by caulking to form the outer ring portion of the stator core (6). (6a) is a fitting recess provided on the inner wall of this outer ring yoke portion, and its opposing side wall surface (6b) is formed so as to coincide with the center line of the inner ring magnetic pole portion, which will be described later. (7) is the outer ring yoke part [5
] A plurality of magnetic pole pieces protruding from the inner circumference by forming slots (8) toward the center, the tip portions (7a) of which are fitted into the fitting recesses (6a) of the outer ring yoke portion (9). (9) is a bridge that connects the tips of each of the plurality of magnetic pole parts, the outer periphery of which is formed in a flat shape, the bridge length l is 5 cm or more, and the width g of the center part is 0.3 mm to 0. .5m
It is set within the range of m. αω is composed of the bridge and the magnetic pole piece (7), and has a plate thickness of 0.35+*m, for example.
Alternatively, there is no problem with the shape of the width of the bridge (9) even if the inner magnetic pole portion is made of laminated iron core plates of 0.5+am and is pressed out using a press machine (not shown), for example. Further, it has minimum processing dimensions and there is no problem in terms of the strength of the inner ring magnetic pole part. 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 (12) of the inner magnetic pole part. (13) is one end surface (14) of the inner ring magnetic pole part α0).
) is molded and fixed to the insulating resin, which has a funnel-like shape, and has a rectangular first rotating shaft through-hole (1
5) is provided. (16) is a rotor installed in the inner ring magnetic pole cavity, and the rotating shaft (17) is fitted in the center. (18) is an insulating cover, which is individually formed into a funnel shape, 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 of the inner ring magnetic pole part. (21) is a drain hole drilled in the insulating resin (13) and the insulating cover (18), and (22) is a drain hole formed integrally with the insulating part (11). The winding frame column is formed on both end faces of the magnetic pole piece (7), and is located at the tip of the magnetic pole piece. It is a triangular prism with an apex on the center side of the inner ring magnetic pole part αO, and serves as a winding kite. The first winding frame column (
23) and a second winding frame column (24) which is formed lower than the first winding frame column (23) without a pin, and each of the winding frame columns (23), (24) or the inner ring magnetic pole. They are alternately arranged at predetermined positions on the part 00). (25) is a recess provided in the side wall of the winding frame column (23), along which the end of the coil to be described later is placed. (26) is 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 00), with which the coil comes into contact. (27) is a pin body, which is composed of a pin (28) inserted into the tip of the first winding frame column (23) and a common part (29), and is electrically connected to the main coil and auxiliary coil, which will be described later. Ru. (30) is a coil, for example, a main coil (32) which has a high space factor in the slot (8) and becomes an internal coil (31), and an auxiliary coil (32) which has a low space factor in the slot (8) and becomes an external coil (33). (34), and is made of a magnet wire made of a self-bonding material. (34a) is the main coil (32
), (35) is the end of the main coil (32), (36> is the start of the auxiliary coil (34), <37)
is the winding end of the auxiliary coil (34), and the floating line that occurs at the coil end of this coil is the ultraviolet curing resin (38).
It is fixed in place. (39) is an insulating wedge that insulates the coil (30) and the outer ring yoke part (51), and is fitted into the gap between the outer ring yoke part (51 and the coil (30). (40) ) is a bearing mounted on the rotating shaft (17), and is made of, for example, a ball bearing.(40a) is an E-type retaining ring, mounted on the rotating shaft (17) and attached to the bearing (4).
0) is retained. (41) is an outer casing, (42) is a frame forming this outer casing, and a flange (43) is provided at the peripheral end. Reference numeral (45) denotes a caulking recess provided in this flange, into which a plurality of curved pieces, which will be described later, are inserted.
A bracket (46) has a flange (43) at its peripheral end, from which a plurality of curved pieces (47) extend. (49) is a through-hole of the winding frame pillar bored in the above-mentioned bracket (44).
2) is highlighted. (50> is a terminal block having a leg part (51) that is inserted into this through hole, and is made of, for example, insulating resin, and the leg part (51) is such that the pin body (27) protrudes to a predetermined length. (51a) is a cord, and (52) is an electronic component arranged on the terminal block (50), such as a capacitor (53), a temperature fuse (
54), etc., and are connected in a predetermined shape with lead wires (
55) is disposed such that its tip is perpendicular to the pin body (27). In addition, when the terminal block (50) is arranged on the outer casing (41), it is formed so that the lead wire (55) and the pin body (27) are in contact with each other, for example, by electric resistance welding (not shown). Connected by (56) is a power cord whose tip is stripped to a predetermined length for connection. (57) is a putty, for example, a two-component type that can be cured at room temperature, and is further added with ultraviolet curability to prevent sagging, and is used to mold the terminal block (50). (58)
is a bottomed cover with an opening on one side, and is made of metal, for example, and is used to protect the terminal block (50) and the molded part (59), which is the hardened part of the putty (57).
24). 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 from being damaged by edges.

In the electric motor configured as described above, its assembly is carried out by attaching the rotating shaft (1
7) is inserted into the first rotating shaft through hole (15), the rotor (16) is housed, the insulating cover (18) is inserted into the rotating shaft (17), and the end ring (19) is inserted into the first rotating shaft through hole (15). is insulated. Next, a flyer type winding machine (not shown) capable of multi-axis control is used to connect the coil (30) to a predetermined pin body (27).
A main coil (32) is formed at the bottom of the main coil (32).

Similarly, the auxiliary coil (34) is formed by winding the coil (30) so that it is located above the main coil (32) in a manner that extends between the slots (8) and twisting the coil (30). In this case, the auxiliary coil <34
The end portion (37) of > is the end portion (37) of the main coil (32).
The common part (
29) is formed. The winding start portion (3) of the main coil (32)
4a) and the winding start portion (36) of the auxiliary coil (34) are dip soldered to the pin body (27), which connects the main coil (32) and the auxiliary coil (34) to the pin (28).
) and are electrically connected. Note that the common part is only exposed and not conductive, so by applying a certain voltage between the pins (28) and checking the withstand voltage, the main coil
32) and the auxiliary coil (34) are tested for interphase withstand voltage. After that, the common part (29) is dip soldered, and the winding end (35) of the main coil (32) and the auxiliary coil (3
The winding end portion (37> of 4) is electrically connected to the pin (28) at the same time.Then, the inner ring magnetic pole part is press-fitted into the outer ring yoke (51) heated by a heating medium (not shown). By cooling and shrinking the yoke portion (5) through the fitting recess (6a), the outer ring yoke portion (the shaft and the inner ring magnetic pole portion αO) are reliably fitted to form the stator core (6). As shown in FIG. 3, a wedge (39) is installed to insulate between the coil (30) and the yoke portion (51).

Next, the coil (30) is heated to fuse the adhesive layer of the magnet wire, which is a self-adhesive material, to fix the space between the coils (30). (4
0a) After installation, attach the stator core (6) to the frame (42
), insert the curved piece (47) of the bracket (46) into the caulking recess (45) of the frame (42), cover the frame (42) from above with the bracket (46), and press the bent piece (47) of the bracket (46) over the frame (42) from above. 47> are bent and connected so as to sandwich the flange (43) of the frame (42) as shown in FIG.

On the other hand, a capacitor (53), a temperature fuse (54), etc. are attached to the terminal block (50) by molding the lead wire (55> into a predetermined shape.Then, the leg part (51) is attached to the bracket (4).
It is attached by inserting it into the through hole (49) of 6>.

In this case, the winding frame column (22) of the inner ring magnetic pole QOI is inserted into the leg (51) of the terminal block (50), positioned and fixed, and the tip of the lead wire (55) and the pin body (27) are connected. They are joined by spot welding by applying electrodes to the orthogonal overlapping parts. Next, a test contact (not shown) is brought into contact with the bottle body (27), voltage is applied, and a motor performance test of predetermined items is carried out. Then, a power cord (56) is placed on the terminal block (50), and its tip is temporarily fixed so that it is perpendicular to the pin body (27).
Joined by spot welding. Furthermore, a terminal block (50
) is filled with putty (57) to insulate exposed charging parts such as lead wires (55), fix electronic components and power cords (56), and mold them. Finally, the protrusion (62)
After pulling the power cord (56) outward, remove the cover (
58) is fitted onto the bracket (46).

〔Effect of the invention〕

As described above, the present invention includes: 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 inner ring magnetic pole portions each consisting of 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 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 face of the inner magnetic pole piece, and a coil whose terminal end is attached to the pin is inserted between the slots. In a stator that is wound in a protruding manner,
Since the above-mentioned winding frame column is composed of multiple pieces with different overall lengths, the amount of molding material used is reduced, reducing material costs.
The winding frame pillar no longer becomes an obstacle to the installation work on the rotor.

[Brief explanation of drawings]

1 and 2 are assembled perspective views showing one embodiment of the present invention, FIG. 3 is a perspective view showing the installation of the wedge, and FIG.
The figure also shows a coil connection diagram of the motor, FIG. 5 is an assembled sectional view of the rotor, FIG. ) are the assembled plan view and partial sectional view of the outer casing, and Figures 8(a) and 8(b)
) are a perspective view and a sectional view of the cover, FIG. 9 is a perspective view showing the fitting of the outer ring yoke portion and the inner ring magnetic pole portion, FIG. 10 is a partially enlarged perspective view of FIG. 9, and FIG. 11 is a perspective view of the cover. is also a plan view of FIG. 1O, FIG. 12 is a partially enlarged view of the bridge, FIG. 13 is a perspective view showing the pin joint, FIG. 14 is a partially assembled sectional view, and FIG. 15 is a conventional FIG. 16 is a perspective view of a stator core showing an electric motor. FIG. 16 is a perspective view of a conventional electric motor. In addition, (5) is the outer ring yoke part, (6) is the stator core, (
7) is a magnetic pole piece, (8) is a slot, aO) is an inner ring magnetic pole part, (11) is an insulating part, (13) is an insulating resin, (15) is a first rotation shaft through hole, (16) is a rotation (18) is the insulating cover, (20) is the second rotating shaft through hole, (22) is the winding frame column, (27) is the pin body, (28) is the pin, (30)
) is a coil.

Claims (1)

[Claims] An outer ring yoke part forming an outer ring part, a stator core formed by fitting an inner ring magnetic pole part having a slot in the outer ring yoke part and consisting of a plurality of magnetic pole pieces, and an inner ring magnetic pole part of this stator iron core. an insulating resin formed integrally with the insulating part and having a first rotary shaft through hole that covers one end surface of the inner ring magnetic pole part and communicates with the center of the inner ring magnetic pole part and is formed in a funnel shape; , a winding frame column having a pin and protruding integrally with the insulating resin is provided on the magnetic pole piece, a rotor is inserted into the inner ring magnetic pole part, and a second rotary shaft is communicated with the first rotating shaft through hole.
A stator comprising a funnel-shaped insulating cover having a rotating shaft through hole attached to the other end face of the inner magnetic pole part, and a coil having a terminal attached to the pin wound in a protruding manner between the slots. An electric motor characterized in that the winding frame column is composed of a plurality of columns having different overall lengths.