JPS5918848Y2 - Manufacturing equipment for squirrel cage rotor core - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for manufacturing a squirrel-cage type mass trochanter core for skewing stacked untightened rotor cores without skew at a predetermined skew angle.

In order to construct a squirrel cage-shaped mass trochanter core with skewed slots, positioning protrusions are formed on each magnetic steel plate with positions slightly shifted according to the skew angle, and the steel plates are laminated. It has already been proposed to automatically obtain a predetermined skew angle.

If this method is used, the mold must be changed each time the skew angle is changed to change the actual position described above, and therefore, it is necessary to prepare many types of molds in order to make various rotor cores. In addition, it took a lot of time and effort to make arrangements such as replacing molds.

The purpose of the present invention is to eliminate such drawbacks, to efficiently manufacture a squirrel cage rotor core having slots with arbitrary skew angles, and to manufacture a squirrel cage rotor core having a configuration suitable for automation. The purpose is to provide equipment.

In order to achieve this purpose, the present invention has developed a system in which the stacked rotor cores are placed in an untightened state on top of the core receiver, and after automatically positioning the rotor cores, a skew mandrel is used to achieve a predetermined skew angle. This constitutes a manufacturing apparatus, and the embodiment shown in the drawings will be described in detail below.

FIG. 1 shows a first embodiment of the present invention.

1 is a base, and a bushing 3 is rotatably provided in a hole passing through the base via a bearing 2.

The upper surface of the base 1 and the upper surface of the bushing 3 are aligned on the same plane.

A positioning mandrel 4 is inserted through the bush 3 so as to be movable in the axial direction.

Relative movement in the rotational direction between the positioning mandrel 4 and the bushing 3 is fixed via a positioning key 5.

The positioning mandrel 4 is driven axially by a cylinder 6 via its piston rod 7.

Cylinder 6 is attached to fixed member 8 .

The positioning mandrel 4 is connected to the rod 7 via a bearing 9.

A return is provided between the rod 7 side and the positioning mandrel 4, which acts so that the positioning mandrel 4 takes a predetermined position in the rotation direction, that is, the position of the tip of the skew key and the position of the positioning key 5, which will be described later, match. A spring 10 is provided.

Arranged on the base 1 are a block 12 for pushing the unprocessed rotor core 11 into a central working position, and a cylinder 14 for driving this block via a rod 13.

Furthermore, rollers 15 are arranged on the base 1 to rotate the rotor core 11 that has been brought to the central working position.

The roller 15 is driven by a motor 16, and the roller 15, the motor 16, and a mounting member 17 to which the roller 15 is attached are connected to the member 17 so that the roller 15 can come into contact with and move away from the iron core 11. rod 1
8 and can be moved as a whole by means of a cylinder 19.

Coaxially facing the positioning mandrel 4 on the base 1,
A skew mandrel 22 driven by a press-fit cylinder 21 fixed to the frame 20 is arranged.

A skew key 23 is attached to the tip of the skew mandrel 22 with a skew angle corresponding to the skew angle of the rotor core finally obtained.

The outer diameters of the skew mandrel 22 and the positioning mandrel 4 are determined so that they can be inserted relatively loosely into the shaft hole of the rotor core 11 to be processed. The cross-sectional dimensions are set so that the engagement is relatively loose.

A push plate 24 is fixed to the base of the skew mandrel 22, and a column 25 is further fixed to and suspended from the push plate 24.

A ring-shaped disk 26 is slidably engaged with the support column 25 .

A stopper 27 is attached to the lower end of the support column 25.

The disc 26 also slidably passes through a guide column 28 established on the base 1.

A stopper 29 is also attached to the upper end of the guide column 28.

A push block 31 is rotatably attached to the disc 26 via a bearing 30.

The skew mandrel 22 is slidable through the push block 31 and penetrates the rotating white cloth according to the position of the skew key 23.

Rotor core 1 to be skewed using the device shown in Figure 1
1 is connected to the base 1 via the cylinder 14 through the block 12.
The rotor core 11 is transported to the central position shown in the figure above, but before going into the explanation of the skew treatment work, the rotor core 11 itself will be explained.

Individual magnetic steel plates 1 used in rotor core 11 according to the present invention
10 is a thrower for secondary conductor as shown in Fig. 3) 11
1. Shaft hole 112 and keyway 11 opening into this shaft hole
3 are each formed by punching, for example, and a V-shaped retainer is formed by providing two parallel cuts in the tangential direction at the same position in the circumferential direction regardless of the skew, and extruding the space between them. A plurality of protrusions 114 are provided at approximately equal intervals in the circumferential direction.

The magnetic steel plates 110 shown in Fig. 3 are positioned using a separately prepared mandrel that can be inserted into the shaft hole 112 using the retaining protrusions 114, stacked without skew, and then transported into the apparatus shown in Fig. 1 without being tightened. do.

During lamination of the steel plates, the protrusions 114 are used as positioning members in the circumferential direction of the magnetic steel plate 110, and the protrusions 114 are fitted between cut side edges 115 of other steel plates to be laminated together.

The rotor core 11 shown in FIG. 1 is an untightened laminated magnetic steel plate assembled in this manner.

Now, when the rotor core 11 is carried to the center position of the device by the cylinder 14, the cylinder 6 is operated and the positioning mandrel 4 is raised via the rod 7, and its tip is attached to the core 11.
is inserted into the shaft hole 112 of.

In that case, when the positioning key 5 comes into contact with the lower end surface of the iron core 11, the positioning mandrel 4 cannot enter into the iron core 11 any further, and lifts the iron core 11 as well, for example, by about 5 mm.

FIG. 1 shows this state.

After this state is reached, the cylinder 19 is operated and the roller 1 is
5 is brought into contact with the outer peripheral surface of the iron core 11.

Thereafter, the motor 16 rotates the iron core 11 relatively slowly via the rollers 15.

As already mentioned, the outer diameter of the positioning mandrel 4 is determined so that it can be inserted into the shaft hole of the rotor core 11 relatively loosely, and the return spring 10 is provided, so that the positioning mandrel 4 can be inserted into the shaft hole of the rotor core 11 relatively loosely. Even if the mandrel 4 is rotated, the mandrel 4 will not rotate accordingly.

When the keyways 113 of the magnetic steel plate are provided in two symmetrical positions as shown in FIG.
In the process of rotating once, the position of the keyway 113 matches the position of the positioning key 5, and as a result, the positioning key 5 of the keyway 113 engages with the iron core 11, which is moved by its own weight onto the base 1 or the bushing 3. to fall.

With the start of this fall, the motor 16 is stopped, and at the same time the roller 15 is moved back by the cylinder 19, the block 12 is moved back by the cylinder 14, and the mandrel 4
The top surface is connected to the base 1 or bush 3 by the cylinder 6.
is lowered so that it is below the top surface of the

The state in which the key groove 113 of the iron core 11 engages with the positioning key 5 indicates that the positioning of the iron core 11 in the circumferential direction has been completed, and the tip of the skew key 23 is also in a position exactly opposite to the key groove 113. , Here, the press-fit cylinder 21 starts lowering the press-fit skew mandrel 22 .

In the process of lowering the mandrel 22, the individual magnetic steel plates 110 of the iron core 11 are shifted little by little in the circumferential direction according to the skew angle of the skew key 23.

In that case, the positioning mandrel 4 and the push block 3
1 is configured to be rotatable, so the rotation of the iron core 11 or the downward movement of the mandrel 22 is not hindered in any way.

Although the skew treatment has been performed in this way, if no pressure force is applied between the individual steel plates yet, gaps are left between the magnetic plates and on one side of the protrusion 114, as shown in FIG. is in a state of

When the skew mandrel 22 is further press-fitted from this state, the push plate 24 comes into contact with the disc 26, and the push block 31 is also lowered together with the mandrel 22.

The push block 31 comes into contact with the upper end surface of the iron core 11 and presses it.

As a result, the gap between the individual magnetic steel plates is gradually compressed while a predetermined skew treatment is performed against the alignment force of the retaining protrusion 114, and the protrusion 114 is attached to one side as shown in FIG. are stretched and stacked with the side edges of the protrusions 114 and the cut side edges 115 of the other magnetic plates tilted in one skew direction without any gaps while maintaining the fitted state.

The downward movement of the press-fitting skew mandrel 22 and the push block 31 is terminated by the operation of a torque limiting limit switch (not shown), which is distantly followed by the mandrel 22 and the push block 31 being pulled up via the press-fit cylinder 21.

In the above process, the rotation of the positioning mandrel 4 as the press-fit skew mandrel 22 is lowered is performed against the spring force of the return spring 10, and as the press-fit skew mandrel is pulled up, the rotation direction is released. The positioning mandrel 4 is forcibly returned to its original position by the spring force of the return spring 10.

FIG. 2 shows an embodiment in which the positioning mechanism in the circumferential direction is different from that shown in FIG.

In the apparatus shown in FIG. 2, parts that are the same as or correspond to those shown in FIG. 1 are designated by the same reference numerals.

In this embodiment, the press-fitting skew mandrel 22 substantially also plays the role of the mandrel 4 in the apparatus shown in FIG. 1, that is, the role of adjusting the keyway position of the rotor core before skewing to a predetermined circumferential position.

A body 41 is rotatably arranged with respect to the base 1 via a bearing 40.

A hollow portion is formed in the body 41 in the shape of a pot, and a mandrel guide 42 is attached to the core receiver.

The guide 42 is provided with a through hole into which the press-fit skew mandrel 22 and the skew key 23 can be inserted, and a keyway opening into the through hole.

A return spring 10 is disposed between the body 41 and the base 1 so that this keyway takes a position corresponding to the tip position of the skew key 23 at the beginning of the process.

An iron core bearing plate 43 is provided on the outer peripheral side of the guide 42 and is slidable in the axial direction relative to the guide 42 and rotatable in the circumferential direction.

In the iron core bearing, the plate 43 is moved upwardly against the weight of the rotor core 11 via a bearing 45 by the spring force of a pressing spring 44 arranged at a circumferential aperture on the upper surface side of the body 41. It is lifted to such an extent that it does not come off the guide 42, and can be lowered to a position where its upper surface is aligned with the upper surface of the guide 42 in the downward direction.

When the plate 43 of the receiver is lowered to about half of the total lowering amount, the limit switch 46 is activated.

The rotation of the plate 43 is effected by the motor 16 via gears 47, 48.

In the apparatus shown in FIG. 2, the unskewed rotor core 11 is first placed centrally on the plate 43 as shown, and then the press-fit skew mandrel 22 is lowered.

Generally, the tip position of the skew key 23 and the position of the keyway of the iron core 11 do not match, so the tip surface of the skew key 23 comes into contact with the upper end surface of the iron core 11, and the press-fit skew mandrel 22 cannot be inserted any further.

Therefore, the press-fitting skew mandrel 22 pushes down the plate 43 via the iron core 11 against the spring force of the pressing spring.

When the plate 43 has descended to about half of its total stroke, the limit switch 46 is activated, and the downward movement of the press-fitting skew mandrel 22 is immediately stopped.

At the same time, the motor 16 is started and gears 48 and 4 are started.
The plate 43 and the rotor core 11 placed thereon are rotated via the plate 7 .

When the iron core 11 rotates while the tip surface of the skew key 23 and the upper end surface of the iron core 11 are in friction, when a magnetic steel plate as shown in FIG. The tip of the iron core 11 and the keyway position of the iron core 11 match.

As a result, the iron core 11 is lifted up by the spring force of the pressing spring holder via the plate 43, and the skew key 23
is slightly inserted into the keyway of the iron core 11.

This completes positioning in the circumferential direction.

After that, the motor 16 is stopped, and the press-fitting skew mandrel 2 is
2 is lowered to continue the skew processing, but this operational part is performed in substantially the same way as in the case of the apparatus shown in FIG. 1, and will therefore be omitted.

The device of the present invention described above can efficiently manufacture a squirrel cage-shaped trochanter core with slots of any skew angle by simply changing the press-fit skew mandrel, and also automatically positions the unskewed core. It can be well incorporated into automated manufacturing lines.

[Brief explanation of the drawing]

Figures 1 and 2 are longitudinal sectional views of different embodiments of the present invention, Figure 3 is an end view of the rotor core manufactured by the apparatus of the present invention, and Figure 4 is a third view of the core in the middle of the manufacturing process. A
FIG. 5 is a partial sectional view taken along line -A, and FIG. 5 is a partial sectional view corresponding to FIG. 4 showing the state at the completion of the process. 1... Base, 4... Positioning mandrel, 5...
・Positioning key, 6... Cylinder, 10... Return spring, 11... Rotor core, 110... Magnetic steel plate,
111...Slot, 112...Shaft hole, 113...
・Key structure, 114... Engagement projection, 15... Core rotation roller, 16... Motor, 21... Cylinder,
22... Press-fit skew mandrel, 23... Skew key, 24... Push plate, 26... Disc, 31...
・Push block, 41...Bottle 42...The core receiver is a mandrel guide, 43...The core receiver is a plate, 44 Pressing spring, 47.48...Gear.

Claims (1)

[Claims for Utility Model Registration] 1. A shaft hole, a keyway opening in the shaft hole, and a plurality of magnetic steel plates having engaging projections formed at the same position regardless of the skew angle. a core receiver on which an untightened rotor core without skew is placed, which is positioned and laminated with a skew mandrel having a skew key arranged at a skew angle; and a positioning device in which the core holder is capable of rotating the iron core placed thereon so that its keyway is in a position opposite to the tip of the mandrel key. , the core receiver inserts the skew mandrel into the shaft hole of the core when the key groove position of the core placed above and the tip end of the mantle key of the skew mandrel match, and the core receiver inserts the skew mandrel into the shaft hole of the core and inserts it into the engagement protrusion. A manufacturing device for a squirrel cage quantum trochanter core, which is equipped with a mandrel drive device that presses against the alignment force of the squirrel cage. 2. The manufacturing device according to claim 1, which is characterized by being provided with a return spring that acts to return the core receiver to a predetermined rotational position in a no-load or light-load state.