JPH0832148B2 - Coil insertion device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a coil inserting device for inserting a stator coil of a rotary electric machine into a slot of a stator core, and more specifically, when fixing the stator coil in the stator core, The present invention relates to a coil insertion device that prevents a wedge from being damaged due to frictional contact between the wedge and the stator coil by inserting the wedge into the slot.

(Prior Art) FIG. 6 is a vertical sectional view of a conventional coil insertion device of this type. Reference numeral 1 is a blade, for example, twelve blades 1 are annularly arranged with a gap of a predetermined width, and are fixed to a bed plate 2 by a holder 3. Reference numeral 4 denotes a stripper, which has 12 protrusions 5 formed on the outer periphery to enter the gap, a notched corner 6 is formed at the upper end of the protrusion 5, and a wedge pusher 7 is integrally formed near the lower end. It is set up.
The stripper 4 is fixed to a drive shaft 8, and the drive shaft 8 is vertically driven by a hydraulic cylinder or the like. Reference numeral 9 is a stator core having a large number of slots 10, 11 is a stator coil, and 12 is a wedge for fixing the stator coil.

Using the conventional coil insertion device having the above structure, the stator coil 11 and the wedge are inserted into the slots 10 of the stator core 9.
To insert 12, the wedge pusher 7 is loaded with the wedge 12, the stator coil 11 is hooked and sandwiched between the adjacent blades, and the stator core 9 is attached to the outer periphery of the blade 1.
Mating. Then, when the drive shaft 8 is raised by a hydraulic cylinder or the like, the stator coil 11 is pushed up by the notched corner portion 6 of the stripper 4 as shown in FIG. 6, and then expanded as shown in FIG. Inserted into the slot 10. Although the insertion of the stator coil 11 into the slot 10 is completed at this stage, the upper end of the stator coil 11 is tilted inward, so as shown in FIG.
To rise. On the other hand, wedge 12 is wedge pusher 7
It is pushed up by and is inserted into the slot 10.
As shown in the figure, at the time when the insertion of the stator coil 11 is completed, the insertion of the wedge 12 is not completed yet. Then, when the stripper 4 further rises so as to raise the upper end of the stator coil 11 to the outside, the wedge 12 is press-fitted into the stator coil 11 while being in frictional contact with the inner peripheral surface of the stator coil 11 at a predetermined position. .

(Problems to be Solved by the Invention) As described above, in the conventional device, the stator coil 11
Insertion of the stator coil 11
Since it is press-fitted while making frictional contact with the wedge 12
Insert becomes tight and the wedge 12 is damaged, or as shown in FIG. 9, the insertion position of the wedge 12 shifts and the stator coil 11 pops out of the slot 10, resulting in a gap between the stator coil 11 and the stator core 9. There was a risk of insulation deterioration. Such defects occur remarkably when the space factor of the stator coil 11 is high.

The present invention solves such a problem, and when the stator coil is inserted into the slot, friction does not occur between the wedge and the coil, and the wedge can be reliably prevented from being damaged or displaced. An object is to provide an insertion device.

(Means for Solving Problems) The coil insertion device of the present invention has a predetermined gap (2
2) A plurality of annularly arranged uprights are provided to hold the stator coil (42) in a state of passing through the gaps (22) and the upper end outer periphery of the blade (21). hand,
A protrusion provided on the outer periphery of a circular space formed by the stator core (43) and the blade (21) in which the openings of the slots (44) formed on the inner periphery face the gap (22) and the protrusion provided on the outer periphery. The portion (26) is positioned in the gap (22), and the stator coil (42) is locked by the protrusion (26) during the ascending process, and the stator coil (42) is fixed to the stator core (42).
Stripper (25) to be pushed into the slot (44) and the drive shaft (2) for moving the stripper (25) up and down.
9), the spring member (33) and the spring member (3
The stripper (25) is pressed against the lower surface of the stripper (25) by 3) to support the lower ends of the wedges (41) arranged on the outer circumferences of the projecting portions (26) of the stripper (25) and to be integrated with the stripper (25) Wedge pusher (3
0) and the wedge pusher (30) causes the wedge (4)
A stopper member (37) for stopping the ascending operation of the wedge pusher (30) against the spring force of the spring member (33) when pushing 1) into a predetermined position in the slot (44). The coil insertion device is adopted as a means.

(Operation) By adopting the above configuration as a means, the wedge pusher (30) pressed against the lower surface of the stripper (25) by the spring member (33) rises integrally with the stripper (25). The wedge (41) supporting the lower end is pushed into the slot (44) together with the stator coil (42). During this time, since the wedge (41) and the stator coil (42) move integrally, frictional contact due to the relative movement of the two does not occur, and damage to the wedge (41) is prevented.

When the wedge (41) is pushed into a predetermined position in the slot (44), the stopper member (37) stops the raising operation of the wedge pusher (30), and thereafter only the stripper (25) continues to rise. The stripper (25)
Raises the inside of the stopped wedge (41) without touching the main body of the stator coil (42) and raises the upper end of the stator coil (42) to the outside by its tip.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side sectional view showing an embodiment of the present invention, and FIG. 2 is a plan view. Reference numeral 20 denotes a ring body (see FIG. 2) in which twelve blades 21 are arranged in an annular shape. Each blade 21 has a gap 22 of a predetermined width between adjacent blades, and a blade holder.
It is fixed to the bed plate 24 by 23. A stripper 25 has a protrusion 26 formed on the outer periphery thereof to enter the gap 22 between the blades 21, and a notched corner portion 27 is formed at the upper end of the protrusion 26. The stripper 25 is fixed by a bolt 28 to a drive shaft 29 driven by a hydraulic cylinder or the like. A wedge pusher 30 is fixed to a spring holder 31 loosely fitted to the drive shaft 29 by a bolt 32, and is attached to the spring holder 31 so as to be freely movable along the drive shaft 29. A spring 33 is mounted in the spring holder 31, one end of the spring 33 abuts a flange portion 34 formed on the drive shaft 29, the other end abuts the spring holder 31, and the other end abuts the spring holder. The wedge pusher 30 is urged to be constantly crimped to the lower end surface of the stripper 25. The stripper 25 and the wedge pusher 30 are configured such that when the wedge pusher 30 is loaded with the wedge 41, the upper end of the wedge 41 substantially coincides with the lower end of the notched corner portion 27. That is, in this embodiment, the thickness of the stripper 25 is matched with the width of the wedge 41.

Reference numeral 35 denotes a pin fixed to the stripper 25, which slidably penetrates into a through hole 36 formed in the wedge pusher 30 and the spring holder 31, so that the stripper 25 and the wedge pusher 30 and the spring holder 31 rotate relative to each other. Is being blocked. 37 and 37 are a pair of stoppers for locking the wedge pusher 30 at the forward end position where the insertion of the wedge 41 is completed, which are fixed to the bed plate 24 with bolts 38 and are flange portions formed at the lower end of the spring holder 31. It is arranged opposite to the position where it abuts 39. Reference numeral 42 is a stator coil that is caught by being caught in the gap 22 between adjacent blades, and 43 is a stator core having a large number of slots 44. Reference numeral 45 is a pressing jig for preventing the stator core 43 fitted on the outer periphery of the ring body 20 from coming off.

This embodiment has the above-mentioned structure, and its operation will be described below with reference to FIGS.

According to the apparatus of this embodiment, the stator coil 42 and the wedge 41 are
To insert into the slot 44, the drive shaft 29 is lowered by a hydraulic cylinder or the like, and the stripper 25 and wedge pusher 30 are moved to the positions shown in FIG. At this position, the wedge 41 is loaded along the blade 21, placed on the wedge pusher 30, and the stator coil 42 is hooked and sandwiched in the gap 22 between the adjacent blades 21, and the stator core 43 is fitted to the outer periphery of the ring body 20. Hold them together with the holding jig 45 so that they will not come out.

After the above preparations, when the drive shaft 29 is raised by a hydraulic cylinder or the like, the stripper 25 also rises accordingly,
As shown in FIG. 3, the stator coil 42 is connected to the stripper 25.
It is hooked on the notched corner portion 27 of the blade, pushed up along the blade 21, and when it reaches the slot 44, it is spread inside the slot. On the other hand, as the drive shaft 29 rises, the wedge pusher 30 also integrally rises while being pressed against the lower end surface of the stripper 25, and the wedge 41 starts to be inserted into the slot 43. When the drive shaft 29 further rises and the lower end of the cutout corner portion 27 reaches the upper surface of the stator core 43 as shown in FIG. 4, the insertion of the stator coil 42 and the wedge 41 is completed. During this time, as described above, the wedge pusher
Since the 30 and the stripper 25 are integrally lifted, the insertion of the stator coil 42 and the insertion of the wedge 41 simultaneously proceed in parallel, and no relative slippage occurs between the stator coil 42 and the wedge 41. Therefore, no frictional resistance is generated and the wedge 41 is smoothly inserted into the slot 43.

After the insertion of the stator coil 42 and the wedge 41 is completed,
Since the upper end of the stator coil 42, which has fallen inward, is raised to the outside, the stripper 25 continues to rise, as shown in FIG. However, as shown in FIG. 4, when the insertion of the wedge 41 is completed, the flange portion 39 formed on the lower end surface of the spring holder 31 comes into contact with the stopper 37, so that the wedge pusher 30 does not move further to that position. It is locked and the spring 33 is compressed and separated from the lower end surface of the stripper 25 (Fig. 5).

The stripper 25 rises inside the stopped wedge 41 without touching the main body of the stator coil 42, and the tip of the stripper 25 raises the upper end of the stator coil 42 that has fallen inward to the outside. After that, the drive shaft 29 is driven downward by a hydraulic cylinder or the like, and the stripper 25 descends.
It is integrated with the above and returns to the position shown in FIG. 1 to complete one step.

As described above, according to the present invention, the stator coil
Since the insertion of the 42 and the wedge 41 proceed in parallel at the same time, almost no frictional resistance is generated between the stator coil 42 and the wedge 41, and the wedge 41 is smoothly inserted into the slot 43. Therefore, even when the stator coil 42 is inserted at a high density, the disadvantage that the wedge 41 is damaged or is inserted into the slot 43 while being displaced is eliminated, and the stator coil 42 pops out and the stator coil 42 and the stator core 43 are removed. It is possible to surely prevent deterioration of insulation between them.

[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 device of this embodiment, and FIGS. 3 to 5 are stator coils 42.
6 and 8 are side sectional views for explaining the operation of the conventional device, and FIG. 9 is a diagram in which the wedge 41 is inserted into the slot 43 while being displaced. It is a schematic diagram which shows the state. 20 ... Annular body, 21 ... Blade, 22 ... Gap, 25 ... Stripper,
26 ... Projection, 27 ... Notch corner, 29 ... Drive shaft,
30 ... Wedge pusher, 33 ... Spring, 37 ... Stopper, 41 ... Wedge, 42 ... Stator coil, 43 ... Stator core, 44 ... Slot

Claims (1)

[Claims] Claims: 1. A plurality of annularly-arranged uprights arranged in the circumferential direction with a predetermined gap, and holding a stator coil in a state of passing through the respective gaps. A stator core in which openings of slots formed in the circumference face the gap and a circular space formed by the blade rises, and a protruding portion provided on the outer periphery is positioned in the gap, and during the ascending A stripper that pushes the stator coil into the slot of the stator core while locking the stator coil by the projecting portion, a drive shaft that moves the stripper up and down, a spring member, and a pressure contact with the lower surface of the stripper by the spring member. And is lifted together with the stripper while supporting the lower ends of the wedges arranged on the outer peripheries of the respective projecting portions of the stripper. A wedge pusher, and a stopper member for stopping the upward movement of the wedge pusher against the spring force of the spring member when the wedge pusher pushes the wedge into a predetermined position in the slot. Coil insertion device.