JP2013051774A - Coil insertion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain a teeth-high phenomenon and insert a coil without deforming a coil end in a waved form, in a coil insertion device used for inserting a two-pole coil in a stator core.SOLUTION: A coil insertion device 10 for two poles comprises plural blades 16 annularly aligned corresponding to inner teeth of a stator core 17, and a stripper 18 arranged inside the blades movably in an axial direction and having pressing teeth inserted in gaps of the respective blades on an outer periphery. At least two guide rods 20 inserted between coils CL with a largest diameter of the two-pole coil stand on an end face in a pushing direction of the stripper while the two-pole coil C is held in the gap of the blades. At least two of the guide rods are spaced from each other by a predetermined interval to be opposed to a center of the end face of the stripper, and arranged along the gap of the coils of the largest diameters.

Description

  The present invention relates to a coil insertion device used for inserting a two-pole coil into a stator core.

  As one of devices for attaching a coil to a stator core, a coil insertion device is known in which a wound coil is held by a coil insertion jig and inserted into a slot of the stator core by a stripper.

  In the coil insertion device, a coil wound concentrically with respect to each magnetic pole is held in a predetermined gap of the blade of the coil insertion jig, and the tip of the blade is fitted to the inner periphery of the inner teeth of the stator core. A stripper having a pushing tooth inserted into the gap between the blades on the outer periphery is arranged inside the blade and moved axially toward the stator core, and the coil held in the gap between the blades is moved to the pushing tooth of the stripper. Is pushed into the corresponding slot of the stator core.

  In addition, as a coil insertion device, in order to minimize the frictional resistance between the blade and the coil, several of the blades arranged in an annular manner, for example, every other blade, can be moved together with the stripper. A blade is known and other blades are fixed blades.

  Furthermore, in such a coil insertion device, in Patent Document 1 below, a substantially cylindrical subcoil stripper is provided on the end surface in the pushing direction of the coil stripper, and a rod-shaped alignment shaft is provided from the center of the end surface of the subcoil stripper. What has been erected is disclosed.

Japanese Patent No. 3979342

  However, in a coil insertion device that inserts a two-pole coil applied to a two-pole motor or the like, the largest-diameter coils of the two-pole coils that are concentrically wound, A strong frictional force is applied from the coils on both sides to the stator core inner teeth (teeth) arranged on the outside of the movable blade by abutting against each other, so that the inner teeth move the stripper as shown in FIG. 12, for example. In some cases, a defective product called so-called tee high is generated which deforms in the direction and protrudes from the end face of the stator core.

  In the coil insertion device of Patent Document 1, since a rod-shaped alignment shaft is erected at the center of the end surface in the pushing direction of the stripper, the largest-diameter coils of the two-pole coils abut against the alignment shaft. However, the above-described tee-high phenomenon is less likely to occur, but the coil end is waved and deformed by the alignment shaft, which makes it difficult to mold the coil end. It was.

  Accordingly, an object of the present invention is to suppress a tee-high phenomenon and to insert a coil end without undulating deformation in a coil insertion device used for inserting a two-pole coil into a stator core. It is to provide what was made.

  In order to achieve the above object, a coil insertion device according to the present invention includes a plurality of blades arranged in an annular shape corresponding to the inner teeth of a stator core, and is arranged inside the blades so as to be axially movable. In a two-pole coil insertion device provided with a stripper having push teeth inserted in the gap on the outer periphery, a two-pole coil is held in the gap of the blade on the end surface in the pushing direction of the stripper. At least two guide rods inserted between the coils having the largest diameter of the two-pole coils are erected, and at least two of the guide rods are located with respect to the center of the end face of the stripper. The coils are arranged at a predetermined interval so as to face each other and along the gap between the coils having the largest diameter.

  According to the coil insertion device of the present invention, the two-pole coils wound concentrically are held in a predetermined gap of the blade, the stator core is mounted on the outer periphery of the tip of the blade, and the stripper is moved toward the stator core. The coil can be inserted into the slot of the stator core by pushing the coil through the gap of the blade into the slot of the stator core. And when inserting a coil with a stripper, since at least two guide rods erected from the end face of the stripper are inserted between the coils having the largest diameter of the two-pole coils, the largest diameter In order to prevent the coils from coming into contact with the guide rods and pressing the coil strongly against the inner teeth arranged between the poles, the inner teeth arranged between the poles are deformed and a tee-high phenomenon occurs. Can be suppressed.

  Moreover, since at least two guide rods are arranged between the coils having the largest diameter of the two-pole coils, the coil ends are separated at least at two places, so that the coil ends are waved and deformed. The coil end can be easily formed, and the coil end can be formed into a well-formed shape.

  In the coil insertion device according to the present invention, at least two of the guide rods arranged to face the center of the end face of the stripper are arranged at a bent portion of the coil formed by the outer peripheral shape of the winding frame. It is preferable.

  According to this aspect, since at least two guide rods are arranged at the closest part of the two-pole coil by being arranged at the bent portion of the coil formed by the outer peripheral shape of the winding frame, It is possible to more effectively prevent the tee high phenomenon and the coil end from undulating.

  In addition, it is preferable that the guide rod is flattened in a wedge shape at the tip, and the flat direction is arranged along the gap between the coils having the largest diameter.

  According to this aspect, the tip of the guide bar is flattened in a wedge shape, so that when the stripper is moved toward the stator core, the tip of the guide bar has the largest diameter of the two-pole coil. Inserts smoothly between them without getting caught.

  According to the coil insertion device of the present invention, when inserting a coil with a stripper, at least two guide rods erected from the end surface of the stripper are inserted between the coils having the largest diameter of the two-pole coils. Therefore, the inner teeth arranged between the poles are deformed in order to prevent the coils having the largest diameters from contacting the guide rods and pressing the coils against the inner teeth arranged between the poles. Thus, the occurrence of the tea-high phenomenon can be suppressed. Moreover, since at least two guide rods are arranged between the coils having the largest diameter of the two-pole coils, the coil ends are separated at least at two places, so that the coil ends are waved and deformed. The coil end can be easily formed, and the coil end can be formed into a well-formed shape.

FIG. 3 is a cross-sectional view showing a state where a stator core is set at the tip of a blade, which is an embodiment of a coil insertion device according to the present invention. In the same apparatus, it is sectional drawing which shows the state which raises a stripper and begins to insert a coil in the slot of a stator core. In the same apparatus, it is sectional drawing which shows the state which raised the stripper further and inserted the coil in the middle of the slot of the stator core. In the same apparatus, it is sectional drawing which shows the state which raised the stripper further and inserted the coil completely in the slot of the stator core. It is a top view which shows the relationship between the stripper of the same apparatus, a braid | blade, and a coil. It is a sectional side view of the stripper of the apparatus. It is a top view which shows the relationship between a stripper, a braid | blade, and a coil in the conventional coil insertion apparatus which does not have a guide bar. It is a top view which shows the relationship between a stripper, a braid | blade, and a coil in the conventional coil insertion apparatus which provided the sub stripper in the end surface of the pushing direction of a stripper, and erected the rod-shaped alignment shaft from the center part of the end surface of this sub stripper. It is the photograph which copied the inner periphery of the stator core which inserted the coil from the coil insertion side (lead side) with the coil insertion apparatus by this invention. It is the photograph which copied the inner periphery of the stator core which inserted the coil from the coil insertion side (lead side) with the conventional coil insertion apparatus which does not have a guide rod. A sub stripper is provided on the end surface in the pushing direction of the stripper, and the inner periphery of the stator core into which the coil is inserted is arranged on the coil insertion side (lead) by a conventional coil insertion device in which a rod-shaped alignment shaft is erected from the center of the end surface of the sub stripper This is a photo taken from the side. It is a photograph which shows the internal teeth of the stator core which deform | transformed by tee high.

  Hereinafter, an embodiment of a coil insertion device according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the coil insertion device 10 has a coil insertion jig 12 installed on a table 11. The coil insertion jig 12 includes a substantially cylindrical housing 14 having a flange portion 13 formed on the outer periphery, a plurality of wedge guides 15 disposed in the housing 14, and a plurality of wedge guides 15 disposed on the inside thereof. Blade 16. In the coil insertion jig 12, the flange portion 13 connected to the housing 14 is placed on the table 11 and is positioned and supported by the pins 27. A stator core 17 is installed on the outer periphery of the upper end portion of the blade 16. A coil receiver 26 is installed on the upper surface of the flange portion 13.

  The blades 16 are annularly arranged as shown in FIG. 5 corresponding to the internal teeth (not shown) of the stator core 17. A stripper 18 is disposed inside the blade 16. Referring also to FIG. 6, the stripper 18 has a cylindrical shape as a whole, and a plurality of push teeth 19 are formed on the outer periphery. The push teeth 19 protrude through the gaps between the blades 16 until they reach the slots (not shown) of the stator core 17. Two guide rods 20 and 20 are erected on the end surface of the stripper 18 on the pushing side. Each guide bar 20 has a distal end portion 20a made thin in a wedge shape (a minus driver shape).

  The blade 16 is divided into a fixed blade 16a and a movable blade 16b. The bases of the fixed blades 16a are fixed to the blade holder 21 (see FIG. 1). On the other hand, the movable blade 16 b has its base portion fixed to the stripper 18. As the stripper 18 moves, the stripper 18 moves in the axial direction. As shown in FIG. 5, every other movable blade 16b is arranged between coils C arranged concentrically with each pole. And in this embodiment, the movable blade 16b is arrange | positioned between the largest diameter coils CL of two poles, ie, between poles.

  Further, each coil C is held through a predetermined gap of the blade 16 and extends radially from the corresponding gap of the blade 16 toward the center O of the stripper 18, and from the middle through the bent portion B, It extends parallel to the straight line connecting the guide bars 20. The parallel portions of the coils C are arranged in parallel with each other with a predetermined gap so that adjacent coils C do not collide with each other. Such a bent shape of the coil C is formed by the outer peripheral shape of the winding frame when a coil is formed by winding a conducting wire around the winding frame with a coil winding device (not shown).

  In this embodiment, the two guide rods 20, 20 of the stripper 18 are disposed between the bent portions B of the coil CL having the largest diameter of the two poles. Since the bent portion B of the coil CL becomes a portion where the coils CL come into contact with each other most strongly when the coil is inserted, it is possible to effectively restrict the coils CL from approaching each other.

  Further, the thickness of the base portion of each guide rod 20 of the stripper 18 (the thickness of the portion inserted between the large-diameter coils CL when the coils are inserted and sandwiched between the coils CL) T is the width of the blade 16 (the stripper). It is preferable to set the dimensions slightly smaller (1-2 mm) than the width of 18 along the circumferential direction.

  Further, the guide rods 20 and 20 of the stripper 18 are arranged so that the flat direction of the tip portions 20a and 20a is a direction along the above-mentioned poles.

  Note that the number of guide bars 20 is not necessarily two, and may be three or more. However, it is preferable that at least two guide rods 20 are arranged at the bent portion B of the large-diameter coil CL at a substantially equal distance from the center O of the stripper 18.

  Referring to FIG. 1 again, the first insertion bolt 22 is detachably connected to the blade holder 21. The stripper 18 is detachably connected with a second insertion bolt 23 slidably disposed inside the first insertion bolt 22. The first insertion bolt 22 and the second insertion bolt 23 can be moved up and down independently by a driving mechanism (not shown).

  The wedge guide 15 has a base portion fixed to the housing 14 and is disposed outside each blade 16. The wedge guide 15 is shorter than the blade 16, and its tip is in contact with the lower end surface of the stator core 17. A wedge (insulating paper) (not shown) is inserted through the wedge guide 15 between them, and is inserted into the slot of the stator core 17 simultaneously with the insertion of the coil. Since these structures are already well-known structures, description thereof will be omitted.

  Next, a coil insertion method using the coil insertion device 10 will be described. The coil C of each pole is wound concentrically by a winding device (not shown) and dropped into a predetermined gap of the blade 16 as shown in FIG. FIG. 1 shows a state where the coil insertion jig 12 to which the coil C has been hooked in this manner is set in the coil insertion device 10. The coil CS indicated by the solid line in FIG. 1 is a coil arranged on the innermost side of the coil wound concentrically, and the coil CL indicated by the imaginary line is arranged on the outermost side of the coil wound concentrically. It is a large diameter coil. The large-diameter coils CL have their coil ends close to the center and are close to the guide rod 20. In this state, the stator core 17 is attached to the upper end portion of the blade 16. At this time, each blade 16 is inserted into the stator core 17 so that the outer surface of each blade 16 is fitted to an internal tooth (not shown) of the stator core 17.

  Next, as shown in FIG. 2, the first insertion bolt 22 and the second insertion bolt 23 are raised together, the blade holder 21 and the stripper 18 are raised together, and the tips of the blades 16 are placed on the stator core 17. The position is slightly protruding from the end face. Here, the rise of the first insertion bolt 22 stops, and thereafter only the second insertion bolt 23 rises. At this time, since the distal end portion 20a of the guide rod 20 of the stripper 18 has a wedge shape, it is smoothly inserted into the gap between the largest diameter coils CL of the two poles without being caught.

  As shown in FIG. 3, when only the second insertion bolt 23 is further raised, the stripper 18 enters the stator core 17, and the coil C held in the gap of the blade 16 by the pusher teeth 19 shown in FIG. Insert into 17 corresponding slots. At this time, as shown by an imaginary line in FIG. 3, the coiles CL having the largest diameters of the two poles try to strongly press the coil ends close to each other. Since the guide rod 20 is disposed, the guide rod 20 is regulated so as to abut against the guide rod 20 and not to move further inward. For this reason, it is possible to prevent a strong pressing force from acting on the internal teeth corresponding to the blades 16 arranged between the poles shown in FIG. 5, and the internal teeth are deformed in the pushing direction to generate a tee high. Can be prevented. Further, as the stripper 18 is raised, the movable blade 16b held by the stripper 18 is also raised, and the frictional force between the coil C and the blade 18 is reduced, so that the coil insertion is smoothed. At this time, a wedge (insulating paper) (not shown) is inserted into the slot of the stator core 17 through the wedge guide 15.

  Thus, when the stripper 18 is raised until it protrudes from the upper end surface of the stator core 17, as shown in FIG. 4, the coil end of each coil C comes out from the tip of the fixed blade 16a to the outer diameter side, and the coil is inserted into the stator core 17. Is completed.

  Thereafter, the second insertion bolt 23 is lowered to return to the state of FIG. 2, and the first insertion bolt 22 and the second insertion bolt 23 are further lowered to return to the state of FIG. Then, by removing the stator core 17 from the tip of the blade 16, the coil insertion operation is completed.

  In this way, since the two guide rods 20 regulate the proximity of the two largest pole coils CL of the two poles, the deformation of the internal teeth of the stator core 17 is suppressed, and the tee high is not caused. As shown in FIG. 9, which will be described later, the coil end can be prevented from being undulated and deformed, facilitating the subsequent coil forming operation, and forming the coil end into a well-formed shape. can do.

Example 1
Coil insertion was performed using the coil insertion device shown in the above embodiment. The inner circumference of the stator core with the coil inserted in this way was photographed from the coil insertion side (lead side), and the photograph is shown in FIG. As described above, when the coil insertion device shown in the above embodiment is used, coil insertion is completed in a state in which a gap is formed with the largest-diameter coils CL of the two poles separated from each other in parallel, and later forming It is easy to work and the shape of the molding is well-organized. Further, in the coil insertion device shown in the above embodiment, the tee high phenomenon did not occur.

Comparative Example 1
As shown in FIG. 7, in the coil insertion apparatus shown in the above embodiment, coil insertion was performed using an apparatus in which the two guide bars 20 were not provided. The inner circumference of the stator core with the coil inserted in this way was photographed from the coil insertion side (lead side), and the photograph is shown in FIG. As described above, when the coil insertion device without the two guide rods 20 is used, the coil insertion is completed in a state where the largest diameter coils CL of the two poles are in contact with each other. It was hard to get rid of. In the coil insertion device, the tea-high phenomenon occurred at a defect rate of about 50%. FIG. 12 shows a photograph of the stator core that has caused the tee high in this way.

Comparative Example 2
As shown in FIG. 8, in the coil insertion device shown in the above embodiment, a sub stripper 25 composed of a cylindrical protrusion is formed at the center of the end surface of the stripper 18 in the pushing direction, and the center of the sub stripper 25 is formed. Coil insertion was performed using a coil insertion device in which one guide rod 24 having a cylindrical shape on the base side from the portion and a tapered tip end portion was provided. The inner circumference of the stator core with the coil inserted in this way was photographed from the coil insertion side (lead side), and the photograph is shown in FIG. As described above, when the coil insertion device provided with the sub stripper 25 and the one guide rod 24 is used, a gap by the guide rod 24 is formed at the center of the gap between the two largest poles CL of the poles. In this state, the coil was inserted and the coil was undulated and deformed, so the molding shape tended to be somewhat disturbed. In the above coil insertion device, the tea-high phenomenon did not occur.

DESCRIPTION OF SYMBOLS 10 Coil insertion apparatus 11 Table 12 Coil insertion jig 13 Flange part 14 Housing 15 Wedge guide 16 Blade 16a Fixed blade 16b Movable blade 17 Stator core 18 Stripper 19 Pushing tooth 20 Guide rod 20a Tip part 21 Blade holder 22 1st insertion bolt 23 1st 2 Insertion bolt C Coil CL Largest diameter coil CS Innermost coil

Claims (3)

  A plurality of blades arranged in an annular shape corresponding to the inner teeth of the stator core, and a stripper arranged on the inner side of the blades so as to be axially movable and having push teeth inserted into the gaps between the blades on the outer periphery. In the two-pole coil insertion device, the end face of the stripper in the pushing direction is between the coils having the largest diameter of the two-pole coils with the two-pole coil held in the gap between the blades. At least two guide rods inserted into the stripper, and at least two of the guide rods are spaced apart from each other by a predetermined distance so as to face the center of the end surface of the stripper, and the largest A coil insertion device, wherein the coil insertion device is disposed along a gap between coils having a diameter.   2. The coil insertion according to claim 1, wherein at least two of the guide rods arranged to face the center of the end face of the stripper are arranged in a bent portion of the coil formed by the outer peripheral shape of the winding frame. apparatus.   The coil insertion according to claim 1 or 2, wherein the guide rod is flattened in a wedge shape at the tip, and is arranged so that the flat direction is along a gap between the coils having the largest diameter. apparatus.