JPS6110927A - Stator for motor - Google Patents

Abstract

PURPOSE:To easily provide a bearing stand for the end face of a core and improve the cooling effect of coils, by bending the both ends of the coils so that they may be protruded outside the outer face of the core. CONSTITUTION:A core 4 of a set of stator blocks Sa, Sb is provided with semi- circular grooves 45 for a space for arranging a rotor R, and with grooves 46 for a space for arranging coils 7. The both longitudinal ends of the rectangular-loop- like coils 7 are bent roughly at the angle of 90 deg. in the same direction to be formed, and the both side coil segments are arranged in the grooves 46. Then, the both ends of the coils 7 are respectively protruded outside the outer face of the core 4, and a space is arranged to be formed between the inner face at the both ends of the coils 7 and the outer face of the core 4. After that, bearing stand blocks Ba, Bb are arranged in a space between the both coils 7 on the outer end faces of the core 4.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Technical Field The present invention relates to a motor, particularly a stator for a DC motor used in a blower such as a dryer.

[Background Art] A stator used in a DC motor is composed of an iron core and a coil attached to it. In the stator, both ends of the fill that protrude from the end face of the iron core are housed within the end face of the iron core, and for this reason, the presence of the coil makes it easy to install the bearing stand that is fixed to the end face of the iron core. Moreover, when used in a blower or the like, there was a problem in that the cooling effect of the coil by the wind was not good.

[Objective of the Invention] The present invention has been made in view of the above points, and its purpose is to provide a motor that is easy to attach to the end face of the iron core of a bearing stand, and has a high coil cooling effect. Provides a stator.

[Disclosure 1 of the Invention] The present invention is composed of an iron core having a rectangular end face shape and a coil attached to the iron core, and both ends of the coil protruding outward from the end face of the iron core are It is characterized in that it is bent toward the outer surface of the iron core, the inner surface of this bent end is located outside the outer surface of the iron core, and a gap is formed between the inner surface and the outer surface of the iron core. 1) The end face of the iron core has a space for mounting the bearing stand, and at the same time, the end b1 of the fill is warped so that it can be easily hit by the wind.

The present invention will be described in detail below based on an embodiment of a two-pole DC motor shown in the drawings. A magnet 1 is fixed to this shaft 2. The connection between the magnet 1 and the shaft 2 is selected depending on the strength of the magnet 1. If the magnet 1 is a plastic magnet, it is press-fitted, if it is a cast magnet, it is pressed in, if it is a cast magnet, it is hard cast or simultaneously formed, and if it is a sintered magnet, it is bonded or Ponting, simultaneous molding,
This is done by means such as guicasting, but in the illustrated example, it is done by botting.

In FIG. 3, 41 is a bonding resin filled between the inner peripheral surface of the magnet 1 and the shaft 2. In addition, 3 in the figure is botting <
14 A pair of members are provided at both ends of the magnet 1 to prevent the oil 41 from flowing out. 36 is a bush for attaching a load member such as a fan to the shaft 2.

A stake S surrounding the outer periphery of the four-way R is composed of a pair of stator blocks Sa and Sb. Both stator blocks S a + S b have a shape that is point symmetrical with respect to the axis 2, and both are formed of an iron core 4 and a coil 7. Both iron cores i are of a laminated type and are clamped and fixed by a clamping pin 5. A semicircular groove 45 is provided at the center of the opposing surfaces of both iron cores 4, which is a space for arranging the rotor R, and grooves 46 and 46 are provided at the left and right sides of the opposing surfaces, respectively, which are spaces for arranging the coil 7. The fill 7 is placed in the groove 46 into which the insulating paper 6 is inserted, and both fills 7 have a rectangular loop shape with both longitudinal ends bent approximately 90 degrees in the same direction to form a front shape. is square, and has a U-shape with an end face shape and a side face shape, and both side pieces are disposed in the two grooves 46, and both ends are disposed on both end faces of the iron core 4. It is something. Note that it is also possible to eliminate the insulating paper 6 and the caulking pin 5 and fix the iron core 4 by simultaneous molding, depending on the manufacturing quantity.

Bearing stand block B i arranged at one end of shaft 2 of rotor R
] is a bearing stand 8, an oil-impregnated felt (not shown), a bearing 9,
Spring 11 holding bearing 9, shaft 2 when subjected to impact load
The stomper 10 suppresses the displacement of the spring 11 to below the elastic limit of the spring 11.
It is composed of etc. The other bearing stand front Ba is
Similarly, it is composed of a bearing stand 8, an oil-impregnated felt placed on the a-ta R side surface of the bearing stand, a bearing 9, etc. In Fig. 2, 32 is a spacer for reducing friction between the rotor R and the bearing 9 and in the last direction, and 33 is a spacer for reducing friction between the rotor R and the bearing 9.
This is an oil spacer to prevent the oil from adhering to other surfaces. The bearing pedestal 8 in this bearing pedestal block Ba has a recess 12 formed on the surface opposite to the rotor R side, and is provided with a coil terminal 17, a boss 16, etc.
A rotational position detection sensor of the rotor R is disposed in the recess 12.

As this sensor, a sensor that performs non-contact detection such as a Hall element and a magnet, a light emitting part and a reflector, etc. is mainly used, but here, a sensor that performs mechanical detection is used. A rotary body C attached to the end, and a pair of axially arranged segments 19 and 20 provided on the outer circumferential surface of the rotary body C, respectively, and each monthly brush spring 13. 4 is used. Both segments 19 above.
20 are integral and connected to each other, but between them there is an insulating part made of resin 18 that is integrally molded with these segments 19 and 20, and the segments 19 have a continuous outer peripheral surface. Although it is
The segment 20 is divided in the circumferential direction by forming another slit in the middle, and furthermore, a part of the segment 20 is also separated from the segment 19. Among the brush springs 13 and 14 fixed to the bearing stand 8 by the eyelet-shaped brush fixing ring 15,
A pair of brush springs 13 connected to the anode contact the outer peripheral surface of the segment 19 on the rotating body C, and a pair of brush springs 14 connected to the cathode contact the outer peripheral surface of the segment 20.

The two bearing blocks Ba and Bb are arranged on the outer surface of the end of the iron core 4 in the stator S and in the space between the two coils 7.7 located on the outer surface of this end. 4, and assembled by fixing bolts 31 and nuts 35 passing through each bearing pedestal 8, 8 and iron core 4, and in which a sensor is arranged. is the recess 1 where the sensor is placed.
A circuit block P is attached so as to cover 2. This circuit block P includes a circuit board 29 fixed to the boss 16 of the bearing stand 8, a trion 228, a rectifier stack 27, a power transistor 21, a sarn absorption capacitor 22 and a varistor 23, a power supply smoothing capacitor 26, etc. It is composed of circuit components, and a lead wire 30 for connection to a power source, a lead wire 40 for connection to a speed control variable resistor, etc. are drawn out.

Now, in the illustrated motor having the shape I#, both ends of each coil 7 are exposed outside both ends of the iron core 4, but the end face shape when combined is rectangular. Both ends of each fill 7 are bent in the lateral direction of the iron core 4, and a part of the fill 7 protrudes beyond the outer surface of the iron core 4. When looking at S, as shown in FIGS. 4 and 5, a gap K is created between the inner surface of the coil 7 at both ends and the outer surface of the iron core 4, and the stay, RiS
The overall end face shape is approximately square, with the rectangular iron core 4 and the coil 7 protruding outward in the transverse direction of the iron core 4.

[Effects of the Invention] As described above, in the present invention, the bent end of the fill is not located within the end face of the iron core, and there is a wide space at the end face of the iron core, so that the end face of the iron core of the bearing stand ＼ is easy to install, and the bent end of the fill protrudes beyond the outer surface of the iron core to form a gap between the inner surface and the outer surface of the iron core. As the air passes through these gaps, the cooling effect of the coil is enhanced, and furthermore, the tape for preventing unraveling can be easily wrapped around the fill.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a cutaway front view of the same, and FIG. 4 is a plan view of the same with the circuit block removed. Fig. 5 is a cutaway plan view of the same as above with the bearing stand removed, in which 4 is the iron core, 7
indicates a coil. Agent Patent Attorney Ishi 1) Chief Figure 7 1

Claims (2)

[Claims] (1) Consisting of an iron core with a rectangular end face and a coil attached to this iron core, both ends of the coil that protrude outward from the end face of the iron core are bent toward the outer surface of the iron core. A stator for a motor, wherein the inner surface of the bent end portion is located outside the outer surface of the iron core, and a gap is formed between the inner surface and the outer surface of the iron core. (2) A stator for a motor according to claim 1, wherein the iron core has a rectangular end face shape, and the coil is bent in the lateral direction of the iron core.