JP3886963B2 - Coil insertion method, coil insertion device, electric motor, rotary compressor, and refrigeration cycle - Google Patents

Description

  The present invention relates to a coil insertion method and a coil insertion device for inserting a coil into a slot of a stator core such as an induction motor, as well as an electric motor and a rotary compressor including a stator manufactured by using this coil insertion method. , Relating to the refrigeration cycle.

  As a coil insertion method to reduce the length of the coil end protruding from the stator core end of the motor and to reduce damage to the coil wire coating due to friction with the blade, it corresponds to the inner teeth of the stator core. Coil insertion in which the first and second movable blades, which are alternately arranged and movable relative to each other in the axial direction, are held by a coil, and this coil is pressed by a stripper and inserted into a slot formed between internal teeth. In the method, after the first and second movable blades are advanced together with the stripper until the coils are inserted from the state in which the coils protrude from the end face of the stator core to the predetermined position until the insertion is completed, the first movable blade There is a coil insertion method in which the second movable blade is moved backward simultaneously with the stripper (see, for example, Patent Document 1).

  According to the above-described coil insertion method, the first and second movable blades holding the coil are advanced together with the stripper to the limit where the coil is almost completely inserted, so that the friction between the blade and the coil is reduced. At the same time, by retracting the second movable blade, the tip of the coil formed in a loop shape is released from the tip of the second movable blade, so that the circumference of the coil can be short.

JP 2000-125521 A (Claims, pages 5 to 6, FIGS. 1 to 8)

  However, in the coil insertion method disclosed in Patent Document 1, since the first movable blade and the second movable blade are alternately arranged, the coils distributed in a plurality of slots are simultaneously inserted. Since the first movable blade protrudes long from the end surface on the opposite side of the stator core on the distal end side of the insertion coil, the coil is not released from the first movable blade and remains pulled in the center direction of the stator core. Therefore, there is a problem that a coil with a long circumference is required.

  For example, if a coil is inserted in two steps in a slot in which a single-phase main coil and auxiliary coil are mixed in concentric winding or a slot in which a three-phase heterogeneous coil is mixed, the coil is inserted first. The slot space factor of the coil is often extremely low in the former when comparing a slot in which other coils are mixed with a slot in which other coils are not mixed. In such a case, in the method of Patent Document 1, since the first movable blade prevents the coil from being released, the length of the coil at the portion protruding from the end face of the stator core is set regardless of the slot space factor. It cannot be shortened. For this reason, coil peripheral length becomes long, waste of electric wire material, and a large loop at the end of the coil increases magnetic flux leakage, leading to a decrease in motor performance due to a decrease in efficiency.

  In addition, since the distance from the upper surface of the stripper to the tip of the first movable blade is long, the amount of retraction when the first movable blade in the latter half of the insertion operation is retracted is large. There was also a problem that friction occurred between them and deteriorated the insulating film of the coil.

  In addition, because of the long blade length due to its structure, the rigidity of the blade is low, the blade bends when the coil is inserted and the distance between adjacent blades changes, and the friction between the blade and the coil during insertion without maintaining an appropriate gap with the coil. This causes problems such as damage to the coil insulation film and deformation of the inner teeth of the stator core, leading to a reduction in quality.

  The present invention has been made in view of the above, and a coil insertion method and a coil insertion which can insert a coil having a short coil circumference into a stator core without deteriorating the insulating film of the coil. It is an object to obtain an apparatus, an electric motor including a stator manufactured by the coil insertion method, a rotary compressor equipped with the electric motor, and a refrigeration cycle equipped with the rotary compressor.

  In order to solve the above-described problems and achieve the object, the coil insertion method of the present invention includes a first movable blade that is arranged corresponding to the internal teeth of a cylindrical stator core and moves in synchronization with the stripper. In the coil insertion method of sandwiching the coil using a stripper and a second movable blade relatively movable, guiding the coil to the slot of the stator core, pressing the coil with the pressing protrusion of the stripper and inserting the coil into the slot, Sandwiching a first coil with a large amount of winding between the first and second movable blades, and sandwiching a second coil with a small amount of winding between the second movable blades; The second movable blade and the stripper are inserted from the insertion end of the stator core and moved forward synchronously, and the first and second coils are pressed by the pressing protrusions of the stripper and inserted into the slot. Advancing until the front end of the second coil reaches the vicinity of the counter-insertion end of the stator core; and further advancing the first movable blade and the stripper simultaneously with retreating the second movable blade; Is advanced to the vicinity of the anti-insertion end of the stator core to complete the insertion of the first and second coils, and the tip of the second movable blade is retracted to the vicinity of the anti-insertion end of the stator core. And a step of unpinching the second coil.

  According to the present invention, the first movable blade and the stripper are further advanced, and at the same time, the second movable blade is retracted, and the front end of the stripper is advanced to the vicinity of the anti-insertion end of the stator core, so that the first and second The insertion of the coil is completed, and the tip of the second movable blade is retracted to the vicinity of the anti-insertion end of the stator core to unpinch the first and second coils. In addition, since the front end of the second coil is completely released, the coil front end is not pulled in the center direction of the stator core, and even a coil having a short coil circumference can be inserted into the stator core.

  DESCRIPTION OF EMBODIMENTS Embodiments of a coil insertion method and a coil insertion device according to the present invention, and an electric motor, a rotary compressor, and a refrigeration cycle having a stator manufactured by using the coil insertion method will be described in detail below with reference to the drawings. Explained. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
1 is a longitudinal sectional view of a coil insertion device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, FIG. 3 is a perspective view showing shapes of a stripper, a blade, and a coil, and FIG. FIG. 5 is a front view showing a state where the coil is set in the insertion device, FIG. 5 is a longitudinal sectional view of the coil insertion device showing a state where the front end of the coil is inserted to the vicinity of the anti-insertion end of the stator core, and FIG. FIG. 7 is a longitudinal sectional view of the coil insertion device showing a state where the coil insertion is completed, FIG. 8 is a front view of the state of FIG. 7, and FIG. 9 is a diagram of a stator coil of a general single-phase induction motor It is a figure which shows an arrangement | sequence.

  In the figure, a stator core 30 formed in a cylindrical shape by stacking iron core pieces has a plurality of inner teeth 31 on an inner peripheral surface, and a slot 32 into which a coil 40 is inserted is interposed between the inner teeth 31. Is formed.

  The coil insertion device 100 includes a cylindrical housing 11 having a lower flange, a base plate 7 attached to the lower end of the housing 11, and a cylindrical wedge guide 10 inserted into the housing 11 and supported by the base plate 7. I have. The wedge guide 10 supports the coil insertion end 30a of the stator core 30 at its upper end, and a wedge guide groove is formed on the inner periphery thereof.

  Although not shown, the wedge for covering the coil 40 after being inserted into the slot 32 from the opening side of the slot 32 and holding it in the slot 32 along the wedge guide groove moves following the stripper 1. It is pushed by the wedge pusher and inserted into the slot 32.

  In the wedge guide 10, the blade holder 2 is accommodated by the blade holder drive shaft 9 so as to be movable up and down, and above the stripper 1 is provided with a pressing protrusion 1 a that presses the coil 40 and inserts it into the slot 32. The stripper drive shaft 8 is accommodated so as to be movable up and down. The blade holder drive shaft 9 and the stripper drive shaft 8 are respectively connected to a drive mechanism (not shown), and can make the stripper 1 and the blade holder 2 move synchronously or reversely (relatively move).

  The stripper 1 and the blade holder 2 are detachable from the stripper drive shaft 8 and the blade holder drive shaft 9, respectively.

  In the recess 1b between the pressing protrusions 1a and 1a on the outer periphery of the stripper 1, the bases of a plurality of first movable blades 5 corresponding to the internal teeth 31 of the stator core 30 are attached by screws. The bases of the plurality of second movable blades 6 corresponding to the internal teeth 31 other than the internal teeth to which the first movable blade 5 corresponds are attached by screws, and the first and second movable blades 5 and 6 are configured as a whole. It is arranged in an annular shape along the inner teeth 31.

  The second movable blade 6 protrudes above the stripper 1 through the recess 1 b of the stripper 1. Since the first movable blade 5 is attached to the stripper 1, the first movable blade 5 moves synchronously with the stripper 1, and the second movable blade 6 is attached to the blade holder 2, so that the first movable blade 5 can be moved synchronously and relatively moved with the stripper 1. is there. The leading ends 5 a and 6 a of the first and second movable blades 5 and 6 have the same height in a state where the rear end of the stripper 1 and the front end of the blade holder 2 are in contact with each other.

  A stator guide 21 having an alignment block 20 is attached to the tips 5a and 6a of the first and second movable blades 5 and 6. The alignment block 20 inserts the tips 5a and 6a of the movable blades 5 and 6 to align the movable blades 5 and 6 in a cylindrical shape at an equal pitch in the circumferential direction. The stator guide 21 is inserted into a stator core 30 held by a clamp mechanism (not shown), and the first and second movable blades 5 and 6 are inserted into the stator core 30 in a state of facing the inner teeth 31 respectively. To be guided.

  Next, with reference to FIG. 2 and FIG. 9, the coil 40 inserted in the stator core 30 using said coil insertion apparatus 100 is demonstrated. The stator core 30 is, for example, a stator core of a single-phase induction motor. The first main coil 41 to the fifth main coil 45 are inserted into the bottom side of the slot 32 formed in the stator core 30, and The first auxiliary coil 46 to the third auxiliary coil 48 are inserted on the opening side.

  The main coil and the auxiliary coil are inserted in separate steps. Of the main coils that are inserted first, they are inserted into the same slots as the third auxiliary coil 48 and the second auxiliary coil 47 that are inserted later. The fourth main coil 44 and the fifth main coil 45 have a smaller coil winding amount than the other first main coils 41 to the third main coil 43. Hereinafter, the first main coil 41 to the third main coil 43 having a large amount of winding will be referred to as a first coil 40a, and the fourth main coil 44 and the fifth main coil 45 having a small amount of winding will be referred to as a second coil 40b. .

  Next, a method for arranging the first and second movable blades 5 and 6 will be described. As shown in FIGS. 2, 4, and 8, the first movable blades 5, 5 are placed outside the loop-shaped front ends 41 a, 43 a of the first main coil 41 and the third main coil 43, and the second main coil 42 and The second movable blades 6 and 6 are disposed outside the loop-shaped front ends 42a and 44a of the fourth main coil 44, and the second movable blades 6 and 6 are disposed outside and inside the loop-shaped front end 45a of the fifth main coil 45. Place each one. In this way, the first and second movable blades 5 and 6 are arranged, and the first coil 40a having a large winding amount is sandwiched between the first and second blades 5 and 6, and the second coil having a small winding amount. The coil insertion device 100 is set so that the coil 40b is sandwiched between the second blades 6 and 6. As described above, the stripper 1 and the blade holder 2 attach the first and second movable blades 5 and 6 to arbitrary positions in the circumferential direction according to the arrangement form of the first and second coils 40a and 40b, respectively. It is supposed to be.

As shown in FIG. 1, the lengths of the portions of the first and second movable blades 5 and 6 protruding from the front end 1c of the stripper 1 are the coil thickness t ₁ and the insertion allowance t ₂ for the alignment block. It is the minimum length determined from

  Thus, compared with the coil insertion apparatus described in Patent Document 1, the rigidity of the blades 5 and 6 is improved by shortening the first and second movable blades 5 and 6. As a result, the bending of the blades 5 and 6 due to the pushing up of the stripper 1 at the time of inserting the coil can be reduced, the change in the distance between adjacent blades can be reduced, and an appropriate gap between the coils can be maintained. Damage and deformation of the internal teeth 31 of the stator core 30 can be prevented. In addition, the amount of movement of the first and second movable blades 5 and 6 when the coil is retracted after inserting the coil into the stator core 30 can be reduced, and there is an advantage that friction with the coil can be reduced.

  Next, the first and second movable blades 5 and 6 are arranged as described above, and the slot 32 of the stator core 30 is used by using the coil insertion device 100 that sandwiches the first and second coils 40a and 40b. Next, a method for inserting the first and second coils 40a and 40b will be described.

  As shown in FIGS. 1, 2, and 4, the first coil 40 a having a large amount of winding is sandwiched between the first and second movable blades 5 and 6 with the stripper 1 and the blade holder 2 retracted. Then, the second coil 40 b having a small winding amount is sandwiched between the second movable blades 6 and 6.

  Subsequently, a stator guide 21 having an alignment block 20 is attached to the tips 5a and 6a of the first and second movable blades 5 and 6, and the stator guide 21 is held by a clamp mechanism (not shown). The core 30 is inserted into the stator core 30 from the insertion end 30a. The first and second movable blades 5 and 6 and the stripper 1 are guided by the stator guide 21 and inserted into the stator 30 from the insertion end 30a.

  Next, the stripper drive shaft 8 and the blade holder drive shaft 9 are operated, and the stripper 1 and the blade holder 2 are moved forward in synchronization, so that the first and second movable blades 5 and 6 are moved forward in synchronization. The first and second coils 40a and 40b are guided by the first and second movable blades 5 and 6 and guided to the slot 32. The first and second coils 40a and 40b are pushed by the front end 1c of the stripper 1 and moved forward, and the pressing protrusion 1a. To be inserted into the slot 32. This insertion operation (advance operation) is performed until the front ends 40c, 40d of the first and second coils 40a, 40b reach the vicinity of the counter-insertion end 30b of the stator core 30, as shown in FIGS. Here, the vicinity of the anti-insertion end 30b includes the inside and the outside of the anti-insertion end 30b.

  When the front ends 40c, 40d of the first and second coils 40a, 40b reach the vicinity of the counter-insertion end 30b of the stator core 30, the blade holder drive shaft 9 is reversely operated to operate the blade holder 2 and the second movable The blade 6 is retracted, and the stripper 1 and the first movable blade 5 continue to advance. As shown in FIGS. 7 and 8, the second movable blade 6 is retracted until its tip 6a protrudes slightly from the anti-insertion end 30b of the stator core 30, that is, near the anti-insertion end 30b. The stripper 1 is advanced until the front end 1c protrudes slightly from the anti-insertion end 30b, that is, until it reaches the vicinity of the anti-insertion end 30b, and enters the slot 32 of the first and second coils 40a and 40b. Complete the insertion and stop. The height position at which the tip 6a of the second movable blade and the front end 1c of the stripper are stopped may be the same as or slightly lower than the anti-insertion end 30b.

  When the front end 1 c of the stripper 1 reaches the vicinity of the anti-insertion end 30 b of the stator core 30, the tip 6 a of the second movable blade 6 may be made to reach the vicinity of the anti-insertion end 30 b of the stator core 30.

  When the tip 6a of the second movable blade 6 is retracted to the vicinity of the anti-insertion end 30b, the first and second coils 40a and 40b are unpinched by the second movable blade 6, and the loop-shaped front end 41a thereof. It is relieved that ˜45a is pulled toward the center of the stator core 30.

  Thereafter, the stator guide 21 provided with the alignment block 20 is removed from the first movable blade 5 and the stripper drive shaft 8 and the blade holder drive shaft 9 are moved backward, so that the coil insertion device 100 is the first shown in FIG. Return to the state. In this state, the stator core 30 in which the first and second coils 40a and 40b are inserted is removed, and the insertion operation of the first and second coils 40a and 40b is completed. The auxiliary coil is inserted in the following process so that the auxiliary coil is held only by the second movable blade 6.

  As described above, according to the coil insertion method of the first embodiment, the first and second movable blades 5 and 6 sandwiching the first and second coils 40 a and 40 b are synchronized with the stripper 1. Since the stator core 30 is advanced to a predetermined position in the slot 32, no friction is generated between the first and second coils 40a and 40b and the first and second blades 5 and 6 until the predetermined position. The insulation coating of the electric wires of the first and second coils 40a and 40b is not deteriorated, and the reliability of the coil insulation is improved. Moreover, it becomes possible to use an inexpensive electric wire material with a thin insulating film, and the space factor of the coil can be improved.

  Further, the first movable blade 5 and the stripper 1 are further advanced, and at the same time, the second movable blade 6 is retracted, and the front end 1c of the stripper 1 is advanced to the vicinity of the counter-insertion end 30b of the stator core 30, thereby The insertion of the second coils 40a and 40b is completed, and the tip 6a of the second movable blade 6 is retracted to the vicinity of the counter-insertion end 30b of the stator core 30 to clamp the first and second coils 40a and 40b. In the unraveling step, when the front ends 40c, 40d of the first and second coils 40a, 40b protrude and advance from the anti-insertion end 30b, the tip 6a of the second movable blade 6 is anti-insertion end of the stator core 30. Since the first coil 40a retracted to the vicinity of 30b and is sandwiched between the first and second movable blades 5 and 6 is released from the sandwiching between the blades, its loop front ends 41a to 43a From being pulled in toward the center of the stator core 30 is relaxed, requires only one coil circumferential length is short, it is possible to reduce the waste of wire materials.

  Further, the second coil 40b sandwiched between the second movable blades 6 and 6 causes the second movable blades 6 and 6 to retreat to the vicinity of the anti-insertion end 30b of the stator core 30. The clamping is completely released, and the stripper 1 is inserted into the slot 32 only by the advancement. Since the second coil 40b has a small amount of winding, the insertion resistance into the slot 32 is small, the insertion work is facilitated, and the blades 6 and 6 on both sides are completely released. 45a is not pulled toward the center of the stator core 30, the coil circumferential length is shorter, and the waste of the wire material can be reduced.

Embodiment 2. FIG.
As shown in FIG. 6, when the front end 1c of the stripper 1 reaches the vicinity of the anti-insertion end 30b of the stator core 30, the tip 6a of the second movable blade 6 is inserted in the coil insertion method of the first embodiment described above. The coil insertion method according to the second embodiment is the second method before the front end 1c of the stripper 1 reaches the vicinity of the counter-insertion end 30b of the stator core 30. The tip 6a of the movable blade 6 is quickly retracted from the height position shown in FIG. 5 to the height position near the counter-insertion end 30b shown in FIG.

  Since the tip 6a of the second movable blade 6 is quickly retracted to the height position near the anti-insertion end 30b, the first and second coils 40a projecting forward from the anti-insertion end 30b of the stator core 30. 40b, the loop-shaped front ends 41a to 45a are immediately released from being clamped by the second movable blade 6, so that the loop-shaped front ends 41a to 45a are less likely to be pulled toward the center of the stator core 30. Thus, the coil peripheral length is shorter and the waste of the wire material can be reduced.

Embodiment 3 FIG.
FIG. 10 is a longitudinal sectional view showing an electric motor having a stator manufactured by using the coil insertion method of the present invention, and a rotary compressor equipped with the electric motor, and FIG. 11 shows the rotation of the third embodiment shown in FIG. It is a block diagram of the refrigerating cycle carrying a compressor.

  As shown in FIG. 10, a rotary compressor 400 for refrigerant such as a freezer or an air conditioner according to Embodiment 3 of the present invention is manufactured using the stator insertion method according to Embodiment 1 or 2. In the specification, a stator iron core into which a coil is inserted is referred to as a “stator”) 60, and a compression element 300. The compression element 300 includes a suction pipe 301 for sucking refrigerant, a cylinder 302, an upper bearing 303, a lower bearing 304, a crankshaft 305 as a rotating shaft, a rolling piston 306, a vane 307, and the like, and is lubricated by a lubricating oil 308. Yes. The electric motor 200 includes a stator 60, a terminal block 40c, a rotor 50, a permanent magnet 50a, and the like manufactured using the coil insertion method of the first or second embodiment. The compression element 300 and the electric motor 200 are fixed in the sealed container 308 by a method such as welding or shrink fitting. The electric motor 200 and the compression element 300 are connected by a crankshaft 305, and the electric motor 200 is mounted on the rotary compressor 400. The arrows in FIG. 10 indicate the flow of the refrigerant. The stator 60, which is a constituent element of the electric motor 200, includes a notch 30c on the outer periphery thereof.

  Next, the operation of the rotary compressor 400 will be described. The rotational motion generated from the electric motor 200 is transmitted to the compression element 300 by the crankshaft 305, and the compression element 300 performs compression work. The high-pressure refrigerant obtained by this compression work is discharged into the sealed container 308 from the refrigerant discharge port 309 of the compression element 300. The high-pressure refrigerant moves to the space above the electric motor 200 through the notch 30c and the gap 201 between the stator 60 and the rotor 50, and is discharged by the discharge pipe 310 attached to the upper part of the hermetic container 308. It is sent to the outside of the rotary compressor 400.

  According to the electric motor 200 and the rotary compressor 400 of the third embodiment, since the stator 60 manufactured using the coil insertion method of the first or second embodiment is provided, the loop-shaped coil end is reduced in size, An efficient electric motor and rotary compressor can be obtained by suppressing magnetic flux leakage and reducing copper loss.

  In addition, the rotary compressor that compresses the refrigerant is required to have an insulating film of the stator coil that is difficult to deteriorate because the temperature of the motor becomes high. However, the electric motor 200 and the rotary compressor 400 of the third embodiment are required. According to this, it is possible to prevent the insulation film of the stator coil 40 from being deteriorated due to a high temperature and to obtain an electric motor and a rotary compressor having high insulation performance.

  Furthermore, when driving an electric motor and a rotary compressor with an inverter with a boost function, since the insulation resistance of the atmosphere in the refrigerant is lower than in the air, high insulation performance is required for the stator coil. Since the insulating performance of the electric motor 200 and the coil 40 of the rotary compressor 400 of the fourth embodiment is not deteriorated, this requirement can be satisfied.

  Next, the refrigeration cycle of Embodiment 3 will be described. FIG. 11 is a configuration diagram of a refrigeration cycle of an air conditioner equipped with a rotary compressor 400 according to Embodiment 3 of the present invention. The air conditioner 500 includes an indoor unit 500a and an outdoor unit 500b, and is connected by connection pipes 501 and 502. A vapor compressor refrigeration cycle using the R410A refrigerant is used, and FIG. 11 shows the state of heating operation. In the refrigerant circuit, a rotary compressor 400, a four-way valve 503, a connection gas pipe 501, an indoor heat exchanger 504, a connection liquid pipe 502, an expansion valve 505, and an outdoor heat exchanger 506 are sequentially connected. In order to exchange heat with air, an indoor blower 507 (a cross-flow fan in this embodiment), an outdoor blower 508, an indoor fan motor 509, and an outdoor fan motor 510 are provided.

  The refrigerant is compressed by the rotary compressor 400 to become a high-temperature compressed gas, dissipates heat in the indoor heat exchanger 504 to become a condensed liquid, expands in the expansion valve 505 to become a low-temperature expanded gas, and heats in the outdoor heat exchanger 506. , And the cycle of being sucked into the rotary compressor 400 is repeated.

  According to the refrigeration cycle 500 of the third embodiment, since the rotary compressor 400 is mounted, a refrigeration cycle with high efficiency and high durability can be obtained.

  As described above, the coil insertion method and the coil insertion device according to the present invention do not deteriorate the insulating film of the coil and can insert a coil having a short coil circumference into the stator core. An electric motor having a stator manufactured by a coil insertion method, a rotary compressor equipped with the electric motor, and a refrigeration cycle equipped with the rotary compressor are highly efficient and highly durable for freezers and air conditioners. Especially suitable as.

It is a longitudinal cross-sectional view of the coil insertion apparatus of Embodiment 1 of this invention. It is a partially broken cross-sectional view along the AA line of FIG. It is a perspective view which shows the shape of a stripper, a braid | blade, and a coil. It is a front view which shows the state which set the coil to the coil insertion apparatus. It is a longitudinal cross-sectional view of the coil insertion apparatus which shows the state by which the front end of the coil was inserted to the non-insertion end vicinity of a stator core. It is a front view of the same state as FIG. It is a longitudinal cross-sectional view of the coil insertion apparatus which shows the state which insertion of the coil was completed. It is a front view of the same state as FIG. It is a figure which shows the arrangement | sequence of the stator coil of a common single phase induction motor. It is a longitudinal cross-sectional view which shows the electric motor of Embodiment 3 provided with the stator manufactured using the coil insertion method of this invention, and the rotary compressor carrying the electric motor. It is a block diagram of the refrigerating cycle carrying the rotary compressor of Embodiment 3 shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stripper 1a Pressing protrusion 1c Front end 2 Blade holder 5 1st movable blade 5a Tip 6 Second movable blade 6a Tip 7 Base board 8 Stripper drive shaft 9 Blade holder drive shaft 10 Wedge guide 11 Housing 20 Alignment block 21 Stator guide 30 Stator core 30a Coil insertion end 30b Non-insertion end 31 Internal teeth 32 Slot 40 Coil 40a First coil 40c Front end of first coil 40b Second coil 40d Front end of second coil 41 First main coil 42 First 2 main coils 43 3rd main coil 44 4th main coil 45 5th main coil 46 1st auxiliary coil 47 2nd auxiliary coil 48 3rd auxiliary coil 60 Stator 100 Coil insertion apparatus 200 Electric motor 300 Compression element 400 Rotary compressor 500 Refrigeration cycle

Claims (8)

A coil is sandwiched between a first movable blade that is arranged corresponding to the inner teeth of the cylindrical stator core and moves in synchronization with the stripper, and a second movable blade that can move relative to the stripper. In the coil insertion method of guiding to the slot of the stator iron core and pressing the coil with the pressing projection of the stripper and inserting it into the slot,
Sandwiching a first coil having a large winding amount between the first and second movable blades, and sandwiching a second coil having a small winding amount between the second movable blades;
The first and second movable blades and the stripper are inserted from the insertion end of the stator core and moved forward synchronously, and the first and second coils are pressed into the slots by pressing protrusions of the stripper. Advancing until the front ends of the first and second coils reach the vicinity of the anti-insertion end of the stator core while inserting,
The first movable blade and the stripper are further advanced, and at the same time, the second movable blade is retracted, and the front end of the stripper is advanced to the vicinity of the anti-insertion end of the stator core, thereby the first and second coils. Completing the insertion, retreating the tip of the second movable blade to the vicinity of the anti-insertion end of the stator core, and unpinching the first and second coils;
A coil insertion method comprising:   The tip of the second movable blade is made to reach the vicinity of the anti-insertion end of the stator core when the front end of the stripper reaches the vicinity of the anti-insertion end of the stator core. Coil insertion method.   Before the front end of the stripper reaches the vicinity of the anti-insertion end of the stator core, the second movable blade is quickly retracted, and the tip thereof reaches the vicinity of the anti-insertion end of the stator core. The coil insertion method according to claim 1. A coil is sandwiched between a first movable blade that is arranged corresponding to the inner teeth of the cylindrical stator core and moves in synchronization with the stripper, and a second movable blade that can move relative to the stripper. In the coil insertion device that guides to the slot of the stator core and presses the coil with the pressing projection of the stripper and inserts it into the slot,
A first coil having a large amount of winding is sandwiched between the first and second movable blades, and a second coil having a small amount of winding is sandwiched between the second movable blades. A coil insertion device, wherein two movable blades are arranged in a circumferential direction along the inner teeth of the stator core.   The length of the portion of the first and second movable blades protruding from the front end of the stripper is the minimum length determined from the thickness of the coil and the insertion allowance of the movable blade into the alignment block. The coil insertion device according to claim 4, wherein   The electric motor provided with the stator manufactured using the coil insertion method as described in any one of Claims 1-3.   The rotary compressor which mounts the electric motor of Claim 6, and compresses a refrigerant | coolant. A refrigeration cycle equipped with the rotary compressor according to claim 7.

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