JPH0376104B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for inserting a coil and a wedge into a slot of a magnetic core of a rotating electrical machine, and particularly to a device for inserting a coil and a wedge into a slot of a magnetic core of a rotating electrical machine where the conductor space factor in the slot of a stator is high. This invention relates to a device suitable for inserting coils and wedges into the body.

1 to 3 show a conventional device for inserting a coil and wedge into a slot in a magnetic core of a rotating electric machine.

The conventional device shown in these figures includes a blade 1, a wedge guide 2, a wedge pusher 3, a base 4, a stripper 5, and the like. A plurality of the blades 1 are arranged in an annular shape in accordance with the slot 11 of the magnetic core 10, and one end of each blade 1 is fixed to the base 4. A plurality of the wedge guides 2 are arranged in a ring shape outside the blade 1, and one end of each wedge guide 2 is also fixed to the base 4.
The wedge pusher 3 is disposed within the ring of the wedge guide 2, and one end thereof is connected to a drive means (not shown) such as a hydraulic cylinder so that it can reciprocate along the wedge guide 2. As clearly shown in FIGS. 2A and 2B, the stripper 5 is provided with a plurality of fins 6 at equal intervals in the circumferential direction, and grooves 7 are formed between adjacent fins 6. As shown in FIG. 3, each groove 7 is fitted with the blade 1, and the stripper 5 is relatively disposed within the ring of the blade 1. Further, as shown in FIG. 1, the stripper 5 is connected to a rod 8 via a bolt 9, and the rod 8 is connected to a drive means such as a hydraulic cylinder (not shown), and the stripper 5 is driven by the drive means. It is adapted to move back and forth along the blade 1.

In addition, in FIGS. 1, 3 to 5, 12 is a slot liner, 13 is a tooth portion of a magnetic core, and 14 is a slot liner.
15 indicates a coil, and 15 indicates a wedge.

The slot 1 of the magnetic core 10 is
To insert the coil 14 and wedge 15 into the blade 1, the stripper 5 is retracted below the blade 1, as shown in the left half of FIG. Next, the pre-wound coil 14 is held at a predetermined position between circumferentially adjacent blades 1, and the wedge 15, which has been formed into a groove shape in advance, is inserted into the wedge guide 2.
be held in a fixed position.

Next, the magnetic core 10 is inserted with the teeth 13 of the magnetic core 10 aligned with the blade 1, the magnetic core 10 is fixed by a fixed positioning device (not shown), and the drive means and the rod 8 connected thereto are fixed. The stripper 5 is raised through the coil 14 as shown in the right half of FIG.
At the same time, the wedge pusher 3 is raised through the driving means as shown in the right half of FIG.
5 and insert it into the slot 11.

Subsequently, after raising the wedge pusher 3 and stripper 5 to a preset position, the first
By pulling it back to the original position shown in the left half of the figure and then removing the magnetic core 10 from the blade 1, the insertion work of the coil 14 and wedge 15 is completed, and the coil 14 and wedge 15 are inserted into the slot 11 as shown in FIG. A product in which the wedge 15 is inserted is obtained.

By the way, in the conventional device described above, when the coil 14 and wedge 15 are inserted, the following force acts as a load in the insertion direction of the wedge 15.

The pressing force exerted on the end face of the wedge 15 by the wedge pusher 3 The frictional force at the contact surface between the wedge 15 and the stripper 5 The frictional force at the contact surface between the wedge 15 and the coil 14 However, Smooth and contact surface is magnetic core 1
0, the frictional force between the two is small and therefore does not contribute to the insertion force of the wedge 15. Therefore, wedzi 1
The insertion force of No. 5 is mainly the pressing force described above.

On the other hand, in recent years, rotating electric machines have been required to save energy by increasing efficiency and save resources by reducing size and weight, and as an effective means to meet these needs, improvements in the space factor of conductors in slots have been attempted.

However, when inserting the coil 14 and wedge 15 using the conventional device, although there are some differences depending on the specifications of the rotating electric machine, if the slot conductor space factor exceeds about 60%, The following failure occurs in the wedge 15.

That is, in the conventional device for inserting the coil and wedge, as shown in FIGS. 1 and 3, the coil 14 and the wedge 15 are simultaneously pressed against the slot 11 by the action of the stripper 5 while the magnetic core 10 is inserted.
Since the wedge 15 is inserted in the axial direction, as the space factor of the conductor in the slot increases, the frictional force of the wedge 15 against the slot liner 12, the slot 11, etc. increases, and the insertion resistance of the wedge 15 increases.

On the other hand, the wedge 15 generally has a thickness of 0.25 to 0.35 mm.
It is constructed by molding a synthetic resin film such as polyester film into a groove shape, and has flexibility.

Therefore, when the coil 14 and wedge 15 are inserted using the conventional device, as the coil 14 and wedge 15 are inserted into the slot 11, the insertion resistance of the wedge 15 increases in proportion to this.
As the load on the end surface of the wedge 15 that comes into contact with the wedge pusher 3 increases, as shown in FIG.
There is a problem that the wedge 15 may be deformed, damaged, or incorrectly inserted. Further, in some cases, the wedge pusher 3 may be deformed or damaged, which not only reduces productivity and quality but also makes production impossible.

An object of the present invention is to improve the ease of inserting a coil and wedge into the slot of a magnetic core of a rotating electric machine in which the space factor of the conductor in the slot of the stator is high, and to improve the ease of inserting the coil and wedge into the slot of the magnetic core of a rotating electric machine, which has a high conductor space factor in the slot of the stator. An object of the present invention is to provide a device for inserting a coil and a wedge into a slot from which a stripper can be smoothly pulled out.

The first aspect of the present invention is to dispose sawtooth-like teeth along the length of the fins of the stripper on the contact surface with the wedge, the tip of which can bite into the wedge when the stripper advances;
This stripper is provided with a release means for releasing the saw-toothed teeth that have bitten into the wedge when the stripper moves in the pullback direction. The release means includes a slide member that is attached to a midway position in the length direction of the stripper fin so as to be movable in the radial direction and has sawtooth teeth formed on the outer end surface, and a slide member that is attached to the stripper's fin so as to be movable in the radial direction. a member for urging the slide member to move backward in the radial direction; and a cam that selects forward or backward movement of the stripper, and when the rod moves in the insertion direction, the cam moves forward in the axial direction relative to the stripper,
The slide member is moved forward in the radial direction of the stripper against the biasing force of the biasing member so that the teeth of the slide member bite into the wedge, and when the rod is moved in the retracting direction, the cam moves backward in the axial direction with respect to the stripper, The above object is achieved by retracting the slide member to release the teeth of the slide member from biting into the wedge.

Furthermore, in the second aspect of the present invention, as the releasing means, grooves are formed along the length of the surface of the stripper's fin that comes into contact with the wedge, and each of the grooves is provided with grooves that contact the wedge when the stripper is pulled back. It is constructed by attaching pawls so as to be rotatable in the direction of releasing the biting, and each of the pawls has a saw-toothed tip, thereby achieving the above object as in the first invention. It is something.

Hereinafter, the embodiments of each invention will be described in Figure 1 without Figure 6.
This will be explained with reference to Figure 3. 6 to 11 show a first embodiment of the first aspect of the present invention.

As shown in FIGS. 6 and 7, the device of the embodiment has a saw-tooth shape that can bite into the wedge 15 on the end surface of the fin 22 of the stripper 21, which is the contact surface with the wedge 15 in the stripper 21. A plurality of teeth 26 are provided. The saw-toothed teeth 26 are provided on the slide member 24, which will be described later, and are connected to grooves 25 provided along the length of the slide member 24, as shown in FIG. 7B. and adjacent grooves 25 at equal intervals, and are disposed on the end face of each fin 22, as shown in FIG. When the stripper 21 advances in order to insert the coil 14 and wedge 15 into the slot 11, the tips of the teeth 26 bite into the wedge 15, and the wedge 15 can be inserted into the slot 11 while remaining bitten.

The stripper 21 also includes a release means for releasing the sawtooth teeth 26 from biting into the wedge 15. The release means can be roughly divided into: the slide member 24 having sawtooth teeth 26 formed thereon; a coil spring 28;
cam 29, these are the stripper 2
It is incorporated in 1.

As shown in FIG. 7B, the slide members 24 are incorporated one by one at substantially intermediate positions in the length direction of each fin 22 of the stripper 21, and extend or retreat along the radial direction of the stripper 21 in the centripetal direction. I'm starting to get it. Furthermore, as described above, the sawtooth-shaped teeth 26 are formed on the outer end surface of the slide member 24 at equal intervals along its length. Further, an inclined surface 27 is formed on the inner end surface of the slide member 24, as shown in FIG. 6, and comes into contact with a cam 29.

The coil spring 28 is formed into a ring shape as shown in FIG. 6 and FIG. In the radial direction of 21, it is urged to retreat in the centripetal direction.

The cam 29 is axially movably mounted inside the stripper 21 and connected to a rod 36 for moving the stripper. More specifically, as shown in FIG. 6, the cam 29 is formed into a cone shape with a slope 30 around its upper part, and is housed in a housing chamber 23 formed in the stripper 21. The cam 29 has a long hole 31 located approximately in the middle position in the axial direction.
and is connected to the stripper 21 by a first pin 32 inserted through the elongated hole 31. In that case, a space 33 is provided in the axial direction between the cam 29 and the bottom of the stripper 21, a spacer 34 is interposed in the space 33, and the space 34 is disposed within the range of the clearance l set by the spacer 34. The cam 29 is axially movable relative to the stripper 21. The cam 29 is also connected via a second pin 35 to a rod 36 for moving the stripper. Note that the rod 36 is connected to a driving means such as a hydraulic cylinder (not shown).

When the rod 36 moves forward, the cam 29 is pushed in the axial direction by the gap l in the stripper 21, and as a result, the slope 30 resists the biasing force of the coil spring 28 and pushes the slope 27 of the slide member 24. When the slide member 24 is pushed forward in the radial direction of the stripper 21 and the rod 36 is moved backward, it is once pulled back against the stripper 21 by the gap l, and the slope 30 presses the slide member 24 against the slope 27. By releasing , the slide member 24 is caused to retreat centripetally above the stripper 21 by the biasing force of the coil spring 28. Therefore, the cam 29 selects whether the slide member 24 moves forward or backward in the radial direction depending on the direction of movement of the stripper 21.

The releasing means is such that when the rod 36 moves in the insertion direction, the cam 29 moves forward in the axial direction with respect to the stripper 21, and the slide member 24 moves forward in the radial direction of the stripper 21 against the biasing force of the coil spring 28. The teeth 26 of the slide member 24 are bitten into the wedge 15, and on the other hand, when the rod 36 moves in the retracting direction, the cam 29 moves backward in the axial direction with respect to the stripper 21, and the slide member 2
4 is moved backward to release the teeth 26 of the slide member 24 from biting into the wedge 15.

Note that the other configurations are the same as those of the apparatus shown in FIGS. 1 to 5, so the explanation thereof will be omitted here.

Next, the operation of the apparatus of the embodiment will be described.

First, the wedge pusher 3, the rod 36, and the stripper 21 are pulled back as shown in the left half of FIG. ing.

In this state, the coil 14 is attached to the adjacent blade 1.
, the wedge 15 is held in the wedge guide 2, and the wedge pusher 3 and rod 36 are moved in the direction of insertion of the coil 14 and wedge 15.
The coil 14 and wedge 15 are inserted into the slot 11 of the magnetic core 10, and in the process, the cam 29 is pushed against the stripper 21 by the rod 36.
is the gap amount l set by the spacer 34
The slide members 24 move forward in the radial direction of the stripper 21 against the biasing force of the coil spring 28 due to the action of the cam 29, the slope 30, and the slope 27 of the slide member 24, and the slide The serrated teeth 26 of the member 24 are shown in FIG.
As shown in FIG. 9, it is pressed against the wedge 15 and bites into it.

Continuing from this state, when the rod 36 and wedge pusher 3 are moved in the direction of insertion of the coil 14 and wedge 15, the coil is inserted into the slot 11 of the magnetic core 10 by the action of the stripper 21, as shown in the right half of FIG. At the same time as 14 is inserted,
Said wedge 3 and serrated teeth 26
The wedge 15 is conveyed by the cooperation of the two, and the wedge 15 is smoothly inserted into the slot 11.

Therefore, even when the space factor of the conductor in the slot is high, troubles such as deformation, damage, or incorrect insertion of the wedge 15 can be eliminated, and the load on the wedge pusher 3 can be reduced, so that deformation of the wedge pusher 3 can be prevented. , damage can also be prevented.

As described above, when the rod 36 and the wedge pusher 3 are moved in the retracting direction after inserting the coil 14 and the wedge 15 into the slot 1, the cam 29 is pulled back by a distance of the clearance l at the beginning of the retracting of the rod 36. When the cam 29 is pulled back,
The urging force of the coil spring 28 causes each slide member 24 to move backward in the radial direction of the stripper 21 all at once, as shown in FIG. It will be canceled.

After the biting of the teeth 26 is released, the rod 36 and the wedge pusher 3 are moved in the retracting direction, thereby removing the stripper so that the wedge 15 inserted into the slot 11 will not be damaged or come off. 21 can be pulled out smoothly, and after pulling out the stripper 21, each member is returned to its original position as shown in the left half of FIG.

Note that the sawtooth-like teeth 26 in this example are not limited to the shape of the illustrated embodiment; for example, as shown in FIG. It is preferable to form the stripper 21 in such a way that it can easily bite into the stripper 21 and easily come off the inserted wedge 15 when the stripper 21 is pulled out.

Next, a twelfth embodiment of the second invention of the present invention will be described.
This will be explained with reference to the figure and Fig. 13.

This embodiment differs from the first embodiment in that the configuration of the release means has been changed. That is, the release means in this case is that grooves 43 for attaching claws are formed at the ends of the fins 42 of the stripper 41 at equal intervals in the length direction of the fins 42, and each groove 43 has a claw 44 attached thereto. is installed. Each claw 44
The tip has serrated teeth, and the rear portion thereof is attached via a pin 45. When the stripper 41 moves in the insertion direction of the coil 14 and the wedge 15, the teeth at the tip of each pawl 44 bite into the wedge 15, and when the stripper 41 moves in the pullback direction, the wedge 15 is inserted into the groove 43. It is designed to be able to rotate around the pin 45 in a direction to release the biting.

Therefore, according to this embodiment, the stripper 4
The tip of the claw 44 moves toward the wedge 1 according to the moving direction of the wedge 1.
5 and the claw 44 itself rotates in a direction to release the biting, so that the same effect as in the first embodiment can be obtained. In this embodiment, one or two claws 44 may be provided.

As described above, in the present invention, when inserting the coil and wedge into the slot of the magnetic core, the serrated teeth provided on the fins of the stripper bite into the wedge. Even if the conductor space factor in the slot is high, the wedge can be inserted smoothly, which eliminates the occurrence of wedge deformation, damage, or incorrect insertion, and prevents problems such as wedge deformation and damage. In addition, the release means releases the sawtooth teeth from digging into the wedge when the stripper is pulled back, so the wedge does not come out of the slot after the coil and wedge are inserted into the slot. This has the effect of allowing you to pull out the stripper smoothly without any problems.

In particular, in the first aspect of the present invention, the release means is composed of a slide member, a biasing member, and a cam, and in the second aspect of the present invention, it is composed of a groove and a pawl provided therein. Both have the effect that the stripper can be pulled out smoothly.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of the conventional device, Fig. 2A is a perspective view of the stripper of the conventional device, and Fig. 2B is the stripper of the conventional device.
Figure 3 is an enlarged sectional view of part _B in Figure A, Figure 3 is an enlarged sectional view taken along the - line in Figure 1, Figure 4 is an enlarged sectional view of the coil and wedge inserted into the slot of the magnetic core, and Figure 5 is an enlarged sectional view of part B in Figure A. The figure is an explanatory diagram of the wedge insertion trouble that occurs with a conventional device, and FIG. 6 is a longitudinal cross-sectional view showing the first embodiment of the first invention of the present invention.
FIG. 7A is a schematic perspective view of the stripper of the same embodiment, FIG. 7B is an enlarged view of part _B of FIG. 7A, and FIGS. 8, 9, and 10 are enlarged views of the main parts. FIG. 11 is an enlarged view of the main part showing a modified example of the saw-toothed teeth, and FIGS. 12 and 13 are enlarged cross-sections of the main part showing an embodiment of the second invention of the present invention. FIG. 1...Blade, 2...Wedge guide, 3...
...Wednesday, 5... Stripper, 6...
...Fins, 8...Rods for moving the stripper, 1
0... Magnetic core, 11... Slot, 14... Coil, 15... Wedge, 21... Stripper, 22... Fin, 24... Slide member, 26
... Sawtooth teeth, 28 ... Coil spring, 29 ... Cam, 36 ... Rod for stripper movement, 41 ... Stripper, 42 ... Fin, 43 ... Groove, 44 ... Claw.

Claims (1)

[Claims] 1. A coil is hooked and held between adjacent blades of a plurality of blades arranged in a ring, and a groove-shaped groove is formed in a plurality of wedge guides arranged in a ring. Holding the wedge, advancing the stripper in the axial direction into the ring of the blade using a rod for moving the stripper, inserting the coil into the slot of the magnetic core, and simultaneously advancing the wedge pusher into the ring of the wedge guide; In the device for inserting a wedge into the slot, serrated teeth are disposed along the length of the fin of the stripper on the contact surface with the wedge, the tip of which can bite into the wedge when the stripper advances. and this stripper,
A release means is provided for releasing the serrated teeth that have cut into the wedge when the stripper is moved in the pullback direction, and the release means moves radially back and forth to a midway position in the length direction of the fin of the stripper. a slide member that is removably mounted and has serrated teeth formed on its outer end surface; a member that urges the slide member to retract centripetally in the radial direction of the stripper; It consists of a cam that is movably mounted and connected to the rod for moving the stripper, and that selects the radial advance or retreat of the slide member depending on the direction of movement in the stripper. The rod moves forward in the axial direction relative to the stripper, and moves the slide member forward in the radial direction of the stripper against the biasing force of the biasing member, causing the teeth of the slide member to bite into the wedge, and when the rod moves in the retracting direction, the cam is activated. A device for inserting a coil and a wedge into a slot of a magnetic core, characterized in that the device is configured to move backward in the axial direction with respect to the stripper, thereby retracting the slide member to release teeth of the slide member from biting into the wedge. 2. A coil is hooked and held between adjacent blades of a plurality of blades arranged in a ring, a groove-shaped wedge is held between a plurality of wedge guides arranged in a ring, and the A stripper is advanced in the axial direction into the ring of the blade by a rod for moving the stripper, and at the same time a coil is inserted into the slot of the magnetic core, a wedge pusher is advanced into the ring of the wedge guide, and the wedge is inserted into the slot. In the device for inserting the stripper, on the contact surface of the fin of the stripper with the wedge, sawtooth-shaped teeth whose tips can bite into the wedge when the stripper advances are disposed along the length direction, and the stripper is inserted into the stripper. ,
A release means is provided for releasing the saw-toothed teeth that have cut into the wedge when the stripper is moved in the pullback direction, and the release means includes a release means that extends in the longitudinal direction on the contact surface of the fin of the stripper with the wedge. Each groove is formed along the stripper, and a pawl is attached to each groove so as to be rotatable in the direction of releasing the wedge when the stripper is pulled back, and each pawl has a sawtooth-like tip. A device for inserting a coil and a wedge into a slot of a magnetic core, characterized by the following: