JPH0810979B2 - Coil insertion device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a coil insertion device for inserting a stator coil of a rotary electric machine into a slot of a stator core, and more specifically, for fixing the stator coil in the stator core. The present invention relates to improvement of a mechanism for inserting a wedge together with a stator coil into a slot.

“Prior Art” Conventionally, as a coil insertion device of this type, there is a device as shown in FIG. For example, a ring body 13 in which twelve blades 11 are annularly arranged with a predetermined gap is a bed plate.
It is fixed to 14 by a ring holder 15. The stripper 16 that advances and retracts inside the ring body 13 is formed with twelve protrusions 17 that engage with the gaps in the ring body 13 on the outer periphery, and a notch corner portion 18 is formed at the upper end of the protrusion 17 Has been done. Further, a wedge pusher 19 is integrally projectingly provided near the lower end of the stripper 16. The stripper 16 is fixed to the drive shaft 20, and the drive shaft 20
Is driven up and down by a hydraulic cylinder (not shown). Using the coil insertion device having the above structure, the stator coil 23 is inserted into the many slots 22 in the stator core 21.
To insert the wedge 24, the wedge pusher 19 is loaded with the wedge 24, the stator coil 23 is hooked and sandwiched between the adjacent blades 11, and the stator core 21 is fitted to the outer periphery of the blade 11. When the drive shaft 20 is raised by the hydraulic cylinder, the stator coil 23 is pushed up by the notched corner portion 18 of the stripper 16 and then pushed out and inserted into the slot 22 as shown in FIG. Slot stator coil 23 at this stage
Although the operation of inserting 22 is almost completed, the upper side of the stator coil 23 is in a state of falling toward the stripper 16. Therefore, as shown in FIG. 8, the stripper 16 is further raised until the upper side of the stator coil 23 occurs. On the other hand, the wedge 24 is also pushed up by the rise of the wedge pusher 19 and inserted into the slot 22 together with the stator coil 23, but as shown in FIG.
When the operation of inserting the 23 into the slot 22 is almost completed, the insertion of the wedge 24 is not completed. Inserting the wedge 24 raises the stripper 16 further to move the stator coil 23
It is a mechanism that is completed almost at the same time when raising the upper side of. However, in this conventional device, the insertion of the wedge 24 is not completed when the operation of inserting the stator coil 23 into the slot 22 is almost completed. Therefore, the wedge 24 is press-fitted into the stator coil 23 while being in frictional contact with the wedge 24, so that the wedge 24 may be tightly inserted and the wedge 24 may be damaged. Further, as shown in FIG. 9, the insertion posture of the wedge 24 is displaced due to frictional resistance, and the stator coil 23 pops out from the slot 22.
Alternatively, there is a problem that insulation between the stator coil 23 and the stator core 21 may be deteriorated. Such a problem particularly occurred when the space factor of the stator coil 23 was high.

"Problems to be Solved by the Invention" Therefore, the present invention has been made to solve the above-mentioned problems, and in addition to arranging the coils at high density so that the gap between the coils in the stator coil becomes small, An object of the present invention is to provide a coil insertion device capable of reducing frictional resistance between a wedge and a stator coil, preventing damage to the wedge, and inserting the wedge into a slot in a predetermined posture.

[Means for Solving the Problems] Therefore, the present invention is composed of a plurality of blades annularly arranged with a gap maintained, and a ring body that holds a stator coil in the gap and fits a stator core on the outer periphery. ,
A protrusion that is driven forwards and backwards along the blade in the ring body and that enters the gap is formed on the outer periphery, and the stator coil is fixed by a stripper that inserts the stator coil into the slot of the stator core by forward drive. In order to insert the wedge into the slot, the wedge pusher which is disposed at the rear portion of the stripper and is driven integrally with the stripper, and the outer periphery extension of the stator core fitted to the ring body are provided, and the wedge is And a vibrating body having a vibrating plate that is pressed against the outer periphery of the stator core to transmit vibration when the coil is inserted into the slot.

[Operation] According to the above configuration, the wedge pusher is loaded with the wedge, the stator coil is hooked and sandwiched in the gap between the adjacent blades, and after the stator core is fitted to the outer periphery of the blade, the stator coil is pushed up by the stripper. The wedge is pushed up by the wedge pusher as it is inserted into the slot in the stator core. When inserting the wedge into the slot, the vibration of the vibrating body is transmitted to the stator core through the diaphragm pressed against the stator core, so that the stator core vibrates in the radial direction and the stator coil already inserted in the slot also transmits the vibration. And vibrates. The stator coil is in a high density state in which the gaps between the coils are filled by vibrating the coils themselves, and the space for inserting the wedge in the slot is also widened. Further, the vibration of the coil itself reduces the frictional resistance between the coil and the wedge. Due to the expansion of the space for inserting the wedge and the reduction of the frictional resistance, the wedge is smoothly inserted into the slot, and the stator coil and the wedge are properly inserted.

[Example] Next, an example of the present invention will be described with reference to Figs. 1 to 5. As shown in FIG. 1 and FIG. 2, the overall structure has a ring body 13 having twelve blades 11 which are fitted with a stator core 21, and a gap 12 having a predetermined width is provided between adjacent blades 11. It is provided. Further, on the side surface of the blade 11 facing the gap 12, a groove for guiding the wedge 24 is formed. Then, the ring body 13 is fixed to the bed plate 14 by the ring body holder 15 bolted to the bed plate 14.
It is fixed to. The stripper 16 is provided around the circumference with a protrusion 17 that engages with the gap 12 in the ring body 13.
A notched corner portion 18 is formed at the upper end of. The stripper 16 is vertically suspended by a stripper coupling bolt 29 on a drive shaft 20 driven by a hydraulic cylinder (not shown) or the like, and is vertically driven along the inner surface of the ring body 13. A wedge pusher 19 protruding in the outer peripheral direction of the stripper 16 and having a size equivalent to the thickness of the wedge 24 is fixed to the bottom surface of the stripper 16 by a pusher coupling bolt 30, and the wedge pusher 19 is driven forward and backward together with the stripper 16. Then, when the wedge 24 is placed on the wedge pusher 19, the dimensions of the cutout corner portion 18 and the height of the stripper 16 are set so that the upper end of the wedge 24 is located slightly lower than the lower end of the cutout corner portion 18 provided in the stripper 16. Sato is set.

On the outer circumference extension of the stator core 21 fitted to the blade 11, the stator coil 23 and the wedge 24 are inserted,
There are 12 commercially available vibrators 1 with pneumatic structure.
Three pieces are arranged at intervals of 0 °. A shaft portion 2 extending toward the stator core 21 side is attached to the vibrating body 1, and the other end of the shaft portion 2 has the same radius of curvature as that of the outer peripheral wall surface of the stator core 21. The vibrating plate 3 in contact with each other is connected by a bolt 4. The shaft portion 2 slidably penetrates the shaft holder 5, and a coil spring 6 for pressing the diaphragm 3 against the stator core 21 is arranged between the diaphragm 3 and the shaft holder 5. Air cylinder 7 for shaft holder 5
When the wedge 24 is inserted into the slot 22, the air cylinder 7 expands and moves the vibrating body 1, the shaft portion 2 and the vibrating plate 3 through the shaft holder 5 to move the vibrating plate 3 to the stator core 21. Contact. A holding jig 8 is provided at a position facing the vibrating body 1 in the extension of the outer circumference of the ring body 13. The holding jig 8 is a jig that locks the outer peripheral portion of the upper end of the stator core 21 when the stator core 21 is fitted to the outer periphery of the ring body 13 and prevents the stator core 21 from coming off from the blade 11.

[Operation] Next, the operation of the above embodiment will be described with reference to FIGS. 3 to 5 in combination with FIG. 1 and FIG. To insert the stator coil 23 and the wedge 24 into the slot 22, lower the drive shaft 20 with a hydraulic cylinder or the like,
The stripper 16 and wedge pusher 19 are moved to the positions shown in FIG. Wedge 24 blade 11 in this position
And load it onto the wedge pusher 19. Then, the stator coil 23 is hooked and sandwiched in the gap 12 between the adjacent blades 11, and the stator core 21 is fixed to the blade of the ring body 13.
It is fitted to the outer circumference of 11 and locked by the holding jig 8 so that it will not come off. Then, the air cylinder 7 is extended to move the shaft holder 5 forward, and the vibration plate 3 attached to the tip of the shaft portion 2 is pressed against the outer peripheral portion of the stator core 21 via the coil spring 6.

After the above operation, when the shaft 20 is continuously raised by the hydraulic cylinder or the like, the stripper 16 is also continuously raised accordingly, and as shown in FIG.
23 is hooked on the notched corner portion 18 of the stripper 16 and pushed up along the blade 11. Further, the wedge 24 is also pushed up along the blade 11 by the wedge pusher 19. At the same time, the vibrating body 1 is oscillated and the vibration is transmitted to the stator core 21 via the vibrating plate 3. When the operation of raising the stripper 16 and inserting the stator coil 23 into the slot 22 is almost completed, the insertion of the wedge 24 is not completed yet. On the other hand, the stator coils 23 inserted in the slots 22 vibrate due to the vibration of the stator core 21, and are arranged in a high density state with a small gap between the coils themselves, as shown in FIG. This allows wedges 24 in slot 22
The space for inserting is widened, and the frictional resistance between the stator coil 23 and the wedge 24 is also reduced. By continuously raising the stripper 16 in this state,
As shown in FIG. 5, the insertion of the stator coil 23 is completed, and substantially at the same time, the wedge 24 is smoothly inserted into the slot 22 in a predetermined posture. When the insertion of the wedge 24 is completed, the vibration of the vibrating body 1 is stopped, the air cylinder 7 contracts, and the vibrating plate 3 is separated from the stator core 21. at the same time,
The drive shaft 20 is retracted downward, the stripper 16 is lowered to the state shown in FIG. 1, and one step is completed.

"Other Embodiments" The present invention is not limited to the details of the above embodiments, and for example, the number of the vibrating bodies 1 to be arranged may be changed,
Further, the vibrating body 1 is not limited to the pneumatic type and may be an electric type or the like. Further, the number of blades is not limited to this.

[Effect] As described above, since the coil insertion device of the present invention has the above-described configuration, the stator coils are arranged in a high density state in which the gap between the coils themselves is reduced by vibration, and the space for inserting the wedge is increased. In addition, the frictional resistance between the wedge and the stator coil is reduced, and the wedge can be smoothly inserted into the slot in a predetermined posture without damage.

[Brief description of drawings]

1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a plan view of the embodiment of the present invention, FIG. 3, FIG. 4 and FIG.
FIG. 6 is a side sectional view, a schematic view and a side sectional view for explaining a step of inserting a stator coil and a wedge into a slot. FIGS. 6 to 8 are side sectional views showing an operation of a conventional device, and FIG. It is a schematic diagram which shows the state in which the wedge was inserted in the attitude | position shifted in the slot. 1 ... Vibrating body, 2 ... Shaft part, 3 ... Vibration plate, 5 ...
... Shaft holder, 6 ... Coil spring, 7 ... Air cylinder, 8 ... Holding jig, 11 ... Blade, 12 ...
Gap, 13 ... Ring, 14 ... Bed plate, 16 ... Stripper, 17 ... Projection, 19 ... Wedge pusher, 20 ...
… Drive shaft, 21 …… stator core, 22 …… slot, 23 …… stator coil, 24 …… wedge.

Claims (1)

[Claims] 1. A ring body, which comprises a plurality of blades arranged in an annular shape with a gap therebetween, and a stator coil is sandwiched in the gap and a stator core is fitted to the outer periphery of the ring body. In order to insert a stripper that inserts the stator coil into the slot of the stator core by the forward drive and a wedge that fixes the stator coil into the slot, a protrusion that is driven forward and backward and enters the gap is formed. A wedge pusher that is disposed at a rear portion of the stripper and is driven integrally with the stripper, and an outer peripheral extension of a stator core that is fitted to the ring body are provided, and the wedge pusher of the stator core is inserted when the wedge is inserted into the slot. A carp having a vibrating body having a vibrating plate that is pressed to the outer periphery and transmits vibration. Insertion device.