JPH0122387Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Field of Industrial Application The present invention relates to a varnish removal device for a stator of a rotating electric machine such as an alternating current generator.

(2) Prior Art This type of stator consists of an annular iron core and a coil wound around it, and after the coil winding operation, varnish is dripped onto the outer peripheral surface of the stator to impregnate the stator. In this case, the varnish also adheres to the inner peripheral surface of the annular core and dries, so it must be peeled off after drying.

(3) Problems to be solved by the invention Conventionally, there was no means to automatically remove the dried varnish that had adhered to the inner peripheral surface of the annular core, so the varnish had to be removed manually each time. , extremely poor workability.

The present invention has been proposed in view of the above, and an object of the present invention is to provide a varnish stripping device that can automatically strip varnish that has adhered to and dried on the inner circumferential surface of an annular core.

B. Structure of the invention (1) Means for solving the problem In order to achieve the above object, the present invention includes a holding stand capable of holding a stator for a rotating electrical machine on a base;
A rotor that can be inserted into and removed from the annular core of the stator is provided, and the rotor has a pair of rotors arranged back to back along the diameter line of the rotor and capable of peeling off the varnish on the inner peripheral surface of the annular core. The cutters are supported slidably in the direction in which the cutters are arranged, and a compressed spring is interposed between the cutters to bias the cutters outward in the radial direction of the rotor, and the cutting edge of each cutter is The annular core is characterized in that it is formed to be inclined with respect to the long groove for coil winding on the inner circumferential surface of the annular core.

(2) Effect According to the above configuration, when the rotor is rotated with the rotor inserted into the annular core of the stator supported on the holding base, the rotor rotates accordingly and is biased by a spring toward the inner peripheral surface of the core. The cutting edge of the cutter rubbed against the inner circumferential surface of the iron core can peel off the dried varnish that adheres to it. At this time, even if there are variations in the inner diameter of the iron core, the biasing force of the spring allows the cutter to be removed. The cutting edge can always be accurately rubbed against the inner circumferential surface of the iron core. Also, during such dry varnish removal work,
The reaction forces that the springs receive from the pair of cutters arranged back to back along the diameter line of the rotor cancel each other out and do not act on the rotor, so there is no risk that the rotor will receive a lateral load due to the reaction force. There is no such thing. Furthermore, during the above-mentioned stripping operation, the cutting edges of each cutter, which are inclined with respect to the long grooves for coil winding on the inner circumferential surface of the annular core, do not bite into the long grooves.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a base, and on the upper surface thereof, first and second support plates 2 ₁ and 2 ₂ are arranged with a predetermined distance between them. The two buildings are located opposite each other. In the support holes 3 ₁ , 3 ₂ of both support plates 2 ₁ , 2 ₂ , a holding cylinder 4 with an opening located on the first support plate 2 ₁ side is fitted and supported.
A cylindrical bearing holder 6 that protrudes inwardly and outwardly is formed on the end wall 5 .

An annular retaining plate 7 is applied to the opening end face of the holding cylinder 4 and the outer surface of the first support plate 2 ₁ and is attached to the first support plate 2 ₁ with a plurality of bolts 8 . Further, the end wall 5 of the holding cylinder 4 is attached to the second support plate 2 ₂ with a plurality of bolts 9 . A stator rotation stopper 11 having a projection 10 protruding from its inner peripheral surface is attached to the upper outer end surface of the annular slip-out prevention plate 7.

The rotor 12 includes a cutter mounting portion 13 and a rotating shaft portion 14 integrally connected thereto. With the cutter mounting portion 13 protruding from the opening of the holding cylinder 4, the rotating shaft portion 14 is connected to a pair of bearings 15. It is rotatably supported by the bearing holder 6 via. Rotating shaft part 14
A pulley 16 is attached to the end protruding from the bearing holder 6.
is fixed to the pulley 16, and a motor 17 (fourth
Power is transmitted from the drive unit (see Fig.) via a speed reducer 18 and a transmission belt (not shown).

The cutter attachment part 13 has a pair of attachment plates 19 facing each other with a predetermined interval therebetween, as shown in FIGS.
A vertical groove 22 and a horizontal groove 23 communicating between the intermediate portion and the other end surface of the mounting plate 19 are formed on the opposing surfaces of both mounting plates 19. Further, near both ends of the vertical groove 22, elongated holes 24 whose major diameters are located in the longitudinal direction of the groove 22 are formed, and adjustment screws 25 inserted into each elongated hole 24 are formed.
The cutter protrusion amount regulating member 26 is slid into the longitudinal groove 22.
is screwed into the

A pair of cutters 27, 27 having the same shape are arranged on the rotor 12 back to back along the diameter line of the rotor 12, and are supported so as to be slidable in the arrangement direction. Next, each cutter 2
7 is formed into a substantially T-shaped cross section by a vertical portion 28 and a horizontal portion 29 integrated therewith. A peeling blade 30 is provided on the upper surface of each horizontal portion 29, and the cutting edge thereof is inclined so as to intersect diagonally with respect to its longitudinal center line. It is formed longer than the length in the generatrix direction of the annular laminated core 32 as the annular core. Further, the narrow end edge 33 of the peeling blade 30 is chamfered. Each vertical part 2
A pin 34 is provided protruding from both side surfaces of the vertical portion 8 at bisecting positions in the longitudinal direction, and a pair of spring housing holes 35 are opened on the lower surface of the vertical portion 28 so as to be located on both sides of the pin 34. .

When installing both cutters 27, their vertical parts 2
8. The coil springs 36 are accommodated in the two sets of upper and lower spring accommodation holes 35 defined by the lower surfaces facing each other, and the coil springs 36 are compressed by being compressed between the two cutters 27, while the coil springs 36 are compressed. 28, butt the lower surfaces together. Then, point one edge 33 of the peeling blade 30 toward the cutter attachment part 13 and attach each pin 34.
through the horizontal grooves 23 of both mounting plates 19 to the vertical groove 22, release the clamping pressure of both cutters 27, and remove each pin 34.
Due to the elastic force of both coil springs 36, the regulating member 26
It is the one that collides with.

The cutter attachment part 13 to which both the cutters 27 are attached as described above is connected by a plurality of bolts 38 with the end surfaces of both attachment plates 19 abutting against the connection plate 37 formed at the end of the rotating shaft part 14. .

In this way, each cutter 27 is attached to the cutter mounting portion 1.
3 so that it can swing freely around a pin 34 and slidably in the radial direction, and each cutter 27
The amount of protrusion from the cutter mounting portion 13 is adjusted as appropriate by the cooperation of the adjusting screw 25, the regulating member 26, and the coil spring 36. The holder 43 of the brush 42 is fitted into the pair of notches 39, 40 of both connecting plates 20, 37 and the long grooves 41 on the outer surface of each mounting plate 19, and the holder 43 of the brush 42 is fitted into the pair of notches 39, 40 of both connecting plates 20, 37 and the long groove 41 on the outer surface of each mounting plate 19. A screw 44 is screwed into the holder 43, thereby attaching both brushes 42 to the rotor 12.

As shown in FIGS. 4 and 5, a pair of guide rods 45 are protruded from the first support plate ₂₁ .
A block 46 is slidably supported. A pair of stator holders 49 having a circular arc surface 47 and a protruding edge 48 along the arc surface 47 are attached to the upper surface of the block 46 with a predetermined distance between them. ) The tip of the piston rod 51 of the cylinder 50 is connected. Further, a stopper 52 for preventing rotation of the stator is provided protruding from the upper surface of the block 46 between the two holding bases 49 .

As shown in FIG. 6, the stator 31 includes an annular laminated iron core 32 having a large number of winding core portions 53 arranged on the inner peripheral surface at equal intervals on the circumference and extending in each generatrix direction;
It consists of three independent coils 54 wound around these winding core parts 53, and a long groove 55 for coil winding exists between adjacent winding core parts 53.

In the stator 31, the annular layered iron core 3
After the coil 54 is wound around the coil 2, varnish is dropped onto the outer peripheral surface of the coil 54, and the stator 31 is impregnated with the varnish. After this varnish impregnation work,
From the inner circumferential surface of the annular layered iron core 32 using the device,
The device is used to peel off the wrapping varnish adhering to it, and the varnish peeling operation using the above device will be explained below.

First, the position of the regulating member 26 is changed and the rotor 12 is
The distance between the center of the cutter 27 and the top surface of the cutter 27 is adjusted so that it is slightly longer than the inner diameter of the annular layered iron core 32. Then, as shown in FIG. 5, with the piston rod 51 of the hydraulic cylinder 50 extended and the block 46 in contact with the stopper 59 of the base 1,
The annular laminated iron core 32 of the stator 31 is placed on a pair of holders 49, and the stoppers 52 are engaged with the long grooves 56 on the outer circumferential surfaces thereof, and the annular laminated iron core 32 is fixed to both holders 49 by fixing members (not shown).

Next, the hydraulic cylinder 50 is operated to contract the piston rod 51, and the annular stratified iron core 3
Insert both cutters 27 into the inside of 2. In this case, since the edges 33 of both cutters 27 with narrow blade widths are chamfered, both cutters 27 are attached to the annular layered core 3.
Smoothly enters opening 2. Thereafter, both the cutters 27 swing around the pin 34 while compressing the coil spring 36 located on the outside, so that the two cutters 27 and the annular laminated iron core 32 are smoothly fitted. After the fitting, each cutter 27 abuts against the inner circumferential surface of the annular layered core 32 over its entire length with a uniform pressing force due to the expansion of both coil springs 36. Further, the protrusion 10 of the stopper 11 engages with the long groove 57 on the outer peripheral surface of the annular laminated core 32, and both end surfaces of the annular stratified core 32 are connected to the holding tube 4.
It is held between the step portion 58 on the inner circumferential surface and the protruding edges 48 of both holding stands 49, thereby fixing the annular laminated core 32 in its circumferential direction and centerline direction. In this state, the peeling blade 3 of each cutter 27
0 is arranged so as to be inclined with respect to each coil winding long groove 55 on the inner circumferential surface of the annular layered iron core 32, as shown in FIG.

When the motor 17 is then driven to rotate the rotor 12, the peeling blades 30 of the pair of cutters 27 rub against the inner peripheral surface of the annular laminated iron core 32, peeling off the dried varnish adhering thereto. In this case, the peeling blade 30
are inclined with respect to the long grooves 55 for coil winding of the annular laminated core 32, so that the stripping blade 30 is attached to each long groove 55.
It does not dig into the annular stratified iron core 3.
Even if there are variations in the inner diameter of each coil spring 36,
Due to the expansion and contraction of the cutters 27, both cutters 27 can be constantly rubbed against the inner circumferential surface of the annular laminated iron core 32. The inner circumferential surface of the annular laminated core 32 after the varnish has been removed is cleaned by both brushes 42 .

C. Effects of the invention According to the invention, the base is provided with a holding stand capable of holding a stator for a rotating electrical machine, and a rotor capable of being inserted into and removed from the annular core of the stator, and the rotor includes:
A pair of cutters that are arranged back to back along the diameter line of the rotor and capable of peeling off the varnish on the inner circumferential surface of the annular core are supported so as to be slidable in the direction in which the cutters are arranged; Since a compressed spring is inserted to bias the cutters outward in the radial direction of the rotor, the rotor can follow the rotor simply by inserting the rotor into the annular core of the stator on the holding table and rotating it. The dry varnish on the inner circumferential surface of the core can be automatically and efficiently peeled off with the cutting edge of each cutter, and this can greatly contribute to improving the efficiency of the peeling operation. In addition, when removing the dried varnish, even if there are variations in the inner diameter of the annular core, the biasing force of the spring ensures that the cutting edge of the cutter always rubs against the inner circumferential surface of the core to accurately remove the varnish. I can do it. Moreover, the reaction forces that the springs receive from the pair of cutters arranged back to back along the rotor diameter line cancel each other out and do not act on the rotor, so there is no risk that the rotor will receive a lateral load due to the reaction forces. This reduces the load on the rotor bearing and stabilizes the support of the rotor. Moreover, since a common spring applies a biasing force to the pair of cutters, the structure is simplified accordingly.

In addition, since the cutting edge of each cutter is formed to be inclined with respect to the long groove for coil winding on the inner circumferential surface of the annular core, there is no risk that the cutting edge of each cutter will dig into the long groove, improving the durability of each cutter. and can contribute to preventing damage to the annular core.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall vertical sectional side view, Fig. 2 is a sectional view taken along the line of Fig. 1, Fig. 3 is an exploded perspective view of the rotor section, and Fig. 4 is a cross-sectional view taken along the line of Fig. 1. Figure 5 is a perspective view of the entire stator held on a holding base, Figure 6 is a front view of the rotor inserted into the annular core of the stator, and Figure 7 is a perspective view of the stator held on the holding stand. FIG. 3 is a plan view showing the relationship with an annular core. DESCRIPTION OF SYMBOLS 1...Base, 12...Rotor, 27...Katsu, 31...Stator, 32...Annular stratified iron core as annular core, 36...Coil spring, 49...
Holding stand, 55...Long groove for coil winding.

Claims (1)

[Scope of utility model registration request] The base 1 includes a holding base 49 capable of holding a stator 31 for a rotating electric machine, and an annular core 32 of the stator 31.
A rotor 12 that can be inserted into and removed from the rotor 12 is provided, and the rotor 12 is provided with a pair of cutters that are arranged back to back to each other along the diameter line of the rotor 12 and are capable of peeling off the varnish on the inner peripheral surface of the annular core 32. 27 so as to be slidable in the arrangement direction of the cutters 27,
A spring 36 is interposed between the cutters 27 in a compressed state to urge the cutters 27 outward in the radial direction of the rotor 12, and the cutting edge of each cutter 27 is connected to the coil winding on the inner peripheral surface of the annular iron core 32. A varnish removal device for a stator of a rotating electric machine, which is formed to be inclined with respect to a long groove 55.