Coil assembly device

Abstract

To provide a coil assembly device capable of suppressing damage to or loss of an insulating member when assembling a coil to a stator core.SOLUTION: A coil assembly device 1 is used for assembling an insulating member 40 and a coil 50 to a slot 31 of a stator core 30. The coil assembly device 1 includes a blade 10 inserted into the slot 31 via the insulating member 40 in a state where the insulating member 40 is inserted into the slot 31 and an expansion part 20 provided on the blade 10 and extending the insulating member 40 toward the inner surface of the slot 31. The expansion part 20 includes an air discharge port 21 that discharges air outward from the blade 10. The blade 10 includes blade surfaces 41, 41 that extend in the radial direction of the stator core 30 and a blade rear surface part 42 that faces the radial outer side of the stator core 30 and opposes the insulating member 40. The air discharge port 21 is provided on the blade surfaces 41, 41 and the blade rear surface part 42.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a coil assembling device for assembling a coil to a stator core such as a motor.

Background Art

[0002] Conventionally, coils have been assembled to the stator core of a motor. The assembly of the coil to the stator core is performed by inserting an insulating paper (insulating member) into each of a plurality of slots formed in the stator core and inserting the coil into the insulating paper. By the way, when assembling the coil to the stator core described above, when the coil is inserted into the slot, the coil may contact the insulating paper, and the insulating paper may shift or fall out of the slot. Therefore, a coil assembling device has been disclosed in which a blade is inserted into the insulating paper inserted into the slot to suppress the displacement of the insulating paper when inserting the coil into the slot (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the coil assembling device described in Patent Document 1 has a problem that although the insulating paper is expanded by the insertion of the blade, it cannot be expanded to the innermost part of the slot of the stator core. Therefore, in the coil assembling device described in Patent Document 1, there is a concern that the tip of the coil contacts the tip side of the insulating paper during coil insertion, causing damage to the insulating paper. Further, in the coil assembling device described in Patent Document 1, the upper side of the insulating paper is expanded using a defense cuffa. That is, in the coil assembling device described in Patent Document 1, the insulating paper is expanded using two types of members, namely, a defense cuffa for expanding the upper side of the insulating paper and a blade for expanding the lower side of the insulating paper. Therefore, there is a concern that the coil assembling device described in Patent Document 1 may have a high cost.

[0005] Therefore, an object of the present invention is to provide a coil assembling device that can suppress contact between an insulating member and a coil when assembling the coil to a stator core, thereby suppressing damage and falling out of the insulating member. Another object of the present invention is to provide a coil assembling device capable of cost reduction.

Means for Solving the Problems

[0006] (1) The coil assembling device of the present invention provided to solve the above-described problems is a coil assembling device for assembling an insulating member and a coil into a slot of a stator core, comprising: a blade that is inserted into the slot through the insulating member with the insulating member inserted into the slot; and an expanding portion provided on the blade for expanding the insulating member toward the inner surface side of the slot, wherein the expanding portion is characterized by including an air discharge port for discharging air outward from the blade.

[0007] In the above-described coil assembling device, since the blade is inserted into the slot of the stator core into which the insulating member is inserted, the insulating member (for example, a sheet material made of paper, resin, rubber, etc.) can be expanded, so that the insertability of the coil into the slot is improved. Further, since the above-described coil assembling device is provided with an air discharge port (jet) for discharging air toward the outside of the blade, the insulating member is further expanded by the air discharged from the air discharge port. Therefore, the above-described coil assembling device can suppress the contact between the insulating member and the coil. As a result, the above-described coil assembling device can suppress damage to the insulating member and the insulating member falling out of the slot. Further, the above-described coil assembling device can remove dust such as burrs by the wind pressure of the air discharged from the air discharge port. Further, the above-described coil assembling device can expand the insulating member by jetting air and does not require a separate drive mechanism or the like, so cost reduction can be expected. Further, the above-described coil assembling device can expand the insulating member not only on the side where the blade is inserted (for example, the lower side) but also on the opposite side where the blade is inserted (for example, the upper side) by jetting air. Therefore, the above-described coil assembling device can omit the defense cuff, so that the cost of the coil assembling device can be reduced.

[0008] (2) It is preferable that the above-described coil assembling device of the present invention is characterized in that a plurality of the air discharge ports are provided at positions facing the insulating member.

[0009] With such a configuration, the above-described coil assembling device can expand the insulating member by the air discharged from the air discharge port. As a result, the above-described coil assembling device can expand the insulating member without bringing the insulating member into contact with the blade, so that contact between the coil and the insulating member during coil assembly can be suppressed. Therefore, the above-described coil assembling device can suppress damage to the insulating member and the insulating member falling out of the slot of the stator core. Further, the above-described coil assembling device can remove dust such as burrs by the wind pressure of the air discharged from the air discharge port.

[0010] (3) The coil assembling device of the present invention described above is preferably characterized in that a plurality of the blades are provided so as to correspond to each slot of the stator core.

[0011] With such a configuration, the above-described coil assembling device can assemble coils to a plurality of slots of the stator core all at once. Therefore, the above-described coil assembling device can improve the efficiency in the coil assembling work.

[0012] (4) The coil assembling device of the present invention described above is preferably characterized in that the blade has a cavity inside, and air can be ejected from the air discharge port by allowing air to flow into the cavity.

[0013] With such a configuration, the above-described coil assembling device can easily form an air discharge port simply by forming holes in the blade. Thereby, the above-described coil assembling device can efficiently eject air from inside the blade.

[0014] (5) In the coil assembling device of the present invention described above, in a state where the blade is inserted into the slot, the blade includes a pair of blade surfaces that expand in the radial direction of the stator core, and in a state where the blade is inserted into the slot, the blade includes a blade back surface that faces the outside in the radial direction of the stator core and faces the insulating member. The air discharge port is preferably provided with at least one on each of the pair of blade surfaces and the blade back surface.

[0015] The above-described coil assembling device has a blade back surface that faces the outside in the radial direction of the stator core, and at least one air discharge port is provided in the blade back surface. Therefore, the above-described coil assembling device can position the back surface of the sheet material of the insulating member by discharging (ejecting) air from the air discharge port of the blade back surface. Thereby, the above-described coil assembling device can assemble coils with high precision.

[0016] (6) In the coil assembling device of the present invention described above, a plurality of the air discharge ports are provided in the blade, and the plurality of air discharge ports are arranged in a staggered manner.

[0017] With such a configuration, the coil assembling device described above can evenly expand the air discharged from the air discharge port. As a result, the coil assembling device described above can evenly expand the insulating member, so that when the coil is inserted into the insulating member, it is possible to more reliably suppress the coil from contacting the insulating member.

[0018] (7) In the coil assembling device of the present invention described above, the blade surface is formed by a set of side end faces of a plurality of the blades arranged in parallel along the radial direction of the stator core, and the respective tip portions of the plurality of the blades inserted into the slot are arranged to be stepped and displaced with respect to the insertion direction so as to form an acute angle with respect to the insertion direction.

[0019] With such a configuration, the coil assembling device described above can improve the insertability when inserting the blade into the insulating member. Here, the tip portion of the blade inserted into the slot is preferably arranged to be stepped and displaced so as to have a downward inclination from the outer side in the radial direction of the slot toward the inner side in the radial direction. As a result, the coil assembling device described above can insert the blade into the insulating member while positioning the back surface portion of the sheet material of the insulating member located on the outer side in the radial direction of the stator core by the back surface portion of the blade. Thereby, the coil assembling device described above can assemble the coil with high precision.

[0020] (8) In the coil assembling device of the present invention described above, the blade is inserted into the slot from the direction opposite to the insertion direction of the coil into the slot.

[0021] By adopting the above-described coil assembling device, interference between the coil and the blade can be suppressed. Therefore, for example, with the blade pre-inserted into the slot (insulating member), the coil can be inserted into the slot (insulating member) from the direction opposite to the insertion direction of the blade. That is, the above-described coil assembling device can smoothly assemble the coil in a state where the insulating member is expanded by the insertion of the blade and the ejection of air.

[0022] (9) In the coil assembling device of the present invention described above, the insulating member is formed by bending a sheet material formed to extend along the axial direction of the slot into a pentagonal prism shape along the axial direction. In a state where it is inserted into the slot, the sheet material expands along the radial direction of the stator core, and includes a pair of sheet material flat portions facing each other with a space therebetween, a sheet material back portion located outside the radial direction of the stator core, and a sheet material opening formed at the tip side of the bent portion facing the inner side in the radial direction of the stator core and opened along the axial direction. It is preferably characterized by this.

[0023] By adopting the above-described coil assembling device, an insulating member adapted to the shape of the slot of the stator core can be provided. Further, by adopting the above-described configuration, when the blade is inserted into the insulating member, the back surface portion of the blade can be opposed to the back surface portion of the sheet material, and the pair of blade surfaces can be opposed to the pair of sheet material flat portions. As a result, the above-described coil assembling device can surely eject the air ejected from the air discharge port of the blade toward the sheet material flat portion and the sheet material back portion, and can discharge the ejected air from the sheet material opening, so that the insulating member can be surely expanded.

Effect of the Invention

[0024] According to the present invention, it is possible to provide a coil assembling device that suppresses contact between an insulating member and a coil when the coil is assembled to a stator core, thereby suppressing damage and falling off of the insulating member. Further, according to the present invention, it is possible to provide a coil assembling device capable of reducing costs.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0026] Hereinafter, a coil assembling device 1 according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that each drawing is schematically shown for easy understanding, and it should be noted that the actual shape, size, and arrangement of components may be different.

[0027] As shown in Fig. 1, the coil assembling device 1 is used when assembling the insulating member 40 and the coil 50 into the slots 31 of the stator core 30. The coil assembling device 1 includes a blade 10 inserted into the slot 31, an extension portion 20 provided on the blade 10, and a plurality of air discharge ports 21 provided on the extension portion 20, etc. Further, although not shown in the figure, the coil assembling device 1 includes a vertical driving mechanism for vertically moving the blade 10 and the coil 50, an insertion mechanism for inserting the insulating member 40 into the slot 31, a supporting member for supporting the stator core 30, etc.

[0028] As shown in Fig. 3, the stator core 30 is formed in an annular shape, and a plurality of flange portions 32 for attachment are provided on the outer peripheral portion of the partition wall 33. A plurality of slots 31 are radially formed in the inner peripheral portion of the partition wall 33 of the stator core 30.

[0029] The slot 31 is formed in a groove shape at a predetermined interval in the vertical direction of the partition wall 33. An insulating member 40 is inserted into each slot 31 by using an appropriate mechanism (not shown).

[0030] The insulating member 40 is formed by bending a sheet material 40A formed to extend along the axial direction (vertical direction) of the slot 31 into a pentagonal prism shape along the axial direction. Further, as shown in Fig. 2(a), the sheet material 40A has five bending portions 45 forming apex angles, and has a sheet material opening portion 43 formed by opening one of the bending portions 45. The sheet material 40A is formed of, for example, insulating paper, resin, rubber, etc. as a material.

[0031] The sheet material 40A includes a pair of sheet material flat portions 41, 41 that expand along the radial direction of the stator core 30 (see Fig. 3) in a state of being inserted into the slot 31 (see Fig. 3). In the following description, unless otherwise specified, the sheet material 40A (insulating member 40) will be described in a state of being inserted into the slot 31.

[0032] The flat portions 41, 41 of the sheet material are positioned at intervals of, for example, 3 to 3.5 mm from each other. Further, the sheet material 40A includes a back portion 42 of the sheet material positioned on the radially outer side of the stator core 30, and a sheet material opening 43 formed at the tip side of the bent portion 45 facing the radially inner side of the slot 31 and opened along the axial direction.

[0033] As shown in FIG. 5, the insulating member 40 (sheet material 40A) is positioned such that the back portion 42 of the sheet material faces the back portion 31B of the slot 31 on the radially outer side thereof. Further, the insulating member 40 is positioned so as to face a pair of slot flat portions 31A, 31A extending in the radial direction of the stator core 30. Further, the insulating member 40 includes a sheet material opening 43 formed at the tip side of the bent portion 45 facing the radially inner side of the stator core 30 and opened along the axial direction (vertical direction) of the slot 31.

[0034] FIG. 4 shows the stator core 30 of a completed product in which the insulating member 40 and the coil 50 are assembled to the slot 31. The coil 50 is formed in an annular shape by winding a large number of electric wires, for example, in a spiral shape. Although details will be described later, at least a part of one end side (the lower end side in the present embodiment) of the coil 50 is inserted into the slot 31 via the insulating member 40.

[0035] As shown in Fig. 1, the blade 10 is inserted into the slot 31 through the insulating member 40 with the insulating member 40 inserted into the slot 31. In the present embodiment, a plurality of blades 10 (only one is shown in the drawing) are provided so as to correspond to each slot 31 of the stator core 30. The blade 10 is connected to an appropriate vertical drive mechanism (not shown) composed of a cylinder, a motor, etc., and is capable of moving vertically. Although details will be described later, in the present embodiment, the blade 10 is inserted into the slot 31 from the direction opposite to the insertion direction (upper side) of the coil 50 into the slot 31 (lower side). The blade 10 includes a pair of blade surfaces 11, 11 (only one side is shown in the drawing) that expand in the radial direction of the stator core 30 when inserted into the slot 31. Further, as shown in Fig. 2(b), the blade 10 includes a blade back surface portion 12 (see Fig. 2(b)) that faces the outside in the radial direction of the stator core 30 and faces the insulating member 40. At least one air discharge port 21, which will be described later, is provided in each of the pair of blade surfaces 11, 11 and the blade back surface portion 12.

[0036] In the present embodiment, the blade 10 is formed as an assembly by arranging three plate-like blades 10F, 10M, and 10R in parallel. Specifically, the blades 10F, 10M, and 10R are arranged in parallel in sequence from the inner side in the radial direction to the outer side in the radial direction of the stator core 30. In the present embodiment, the blades 10F, 10M, and 10R are arranged in parallel so as to be in contact with each other.

[0037] As shown in FIG. 1, the blades 10F, 10M, and 10R are sequentially arranged in parallel such that their planar portions are orthogonal to the radial direction of the stator core 30, respectively. Also, the blades 10F, 10M, and 10R are arranged such that their respective tip portions (upper end side in this embodiment) inserted into the slots 31 are stepped and shifted in the insertion direction so as to form an acute angle with respect to the insertion direction. In other words, the respective tip portions of the blades 10F, 10M, and 10R inserted into the slots 31 are arranged to form an acute angle with respect to the insertion direction. Therefore, the blade 10 can be inserted into the slot 31 without contacting the insulating member 40.

[0038] Further, the blades 10F, 10M, and 10R (blade 10) each have a cavity inside. In other words, the blades 10F, 10M, and 10R are each formed as a hollow rectangular parallelepiped (box). An air pump (not shown) is connected to the blades 10F, 10M, and 10R, and air can flow into the inside. Also, air discharge ports 21 as extension portions 20 are formed in blade surfaces 11, 11 and blade back surfaces 12, which will be described later, of the blades 10F, 10M, and 10R. Therefore, the blades 10F, 10M, and 10R can eject (discharge) the air flowing into the inside from the air discharge ports 21.

[0039] The blade surfaces 11, 11 are substantially flat surfaces facing a pair of slot flat portions 31A, 31A (also referred to as inner surfaces) of the slots 31 that extend in the radial direction of the stator core 30, respectively. As described above, the blade 10 is an assembly of the blades 10F, 10M, and 10R. Therefore, the blade surfaces 11, 11 are formed by the set of side end surfaces of the plurality of blades 10F, 10M, 10R arranged in parallel along the radial direction of the stator core 30. That is, the blade surfaces 11, 11 are formed in a stepped shape that slopes downward from the radially outer side to the radially inner side of the stator core 30 in a front view (viewing direction of the drawing, paper surface direction). Also, the blade surfaces 11, 11 are configured to face the sheet material flat portions 41, 41 of the insulating member 40, respectively, in the inserted state into the slots 31.

[0040] At least one air discharge port 21 (expansion portion 20) is formed in each of the blade surfaces 11, 11. Specifically, a plurality of air discharge ports 21 are formed in a staggered arrangement on the side end surfaces of the respective blades 10F, 10M, 10R. The air discharge port 21 is formed as, for example, a circular hole, and can eject the air flowing into the inside of the blades 10F, 10M, 10R outward. Thereby, as shown in FIG. 5(a), the air is ejected toward the sheet material flat portions 41, 41 facing the blade surfaces 11, 11, and as shown in FIG. 5(b), the insulating member 40 expands toward the inner surface of the slot 31.

[0041] As shown in Fig. 2(b), the blade back surface portion 12 is a plane formed so as to face the radially outer side of the stator core 30. In other words, the blade back surface portion 12 corresponds to a plane portion located on the rear side of the blade 10R. Further, at least one air discharge port 21 is formed in the blade back surface portion 12. In the present embodiment, three air discharge ports 21, 21, 21 are formed along the axial direction of the slot 31. Further, as shown in Figs. 5(a) and 5(b), the blade back surface portion 12 is opposed to the sheet material back surface portion 42 in a state of being inserted into the slot 31. Thereby, air is jetted toward the sheet material back surface portion 42 opposed to the blade back surface portion 12, and the insulating member 40 expands toward the slot plane portions 31A, 31A (inner surfaces) of the slot 31.

[0042] The above is the configuration of the coil assembling device 1 according to an embodiment of the present invention. Next, the details of the operation of assembling the coil 50 into the slot 31 using the coil assembling device 1 of the present invention will be described.

[0043] Although not shown in the drawings, prior to the assembly of the coil 50, the insulating member 40 is inserted into the slot 31 of the stator core 30 in advance using an appropriate insertion mechanism (not shown). Subsequently, as shown in Fig. 1, the blade 10 rises toward the slot 31 of the stator core 30 supported by an appropriate support member (not shown), and the blade 10 is inserted into the slot 31 (insulating member 40). At this time, since the tip of the blade 10 is formed at an acute angle with respect to the insertion direction, the blade 10 is smoothly inserted into the insulating member 40. Further, since the blade 10 is sequentially inserted from the tip of the blade back surface portion 12 toward the radially inner side of the stator core 30, the insulating member 40 (sheet material 40A) is sequentially positioned at a predetermined position in the slot 31 from the side of the sheet material back surface portion 42.

[0044] Also, with the insertion of the blade 10 into the slot 31, as shown in FIG. 5(a), air is jetted from the air outlet 21 (expansion part 20). As a result, as shown in FIG. 5(b), the insulating member 40 is pressed by the air pressure jetted from the air outlet 21 and expands toward the slot flat parts 31A, 31A of the slot 31. Further, since the insulating member 40 has the sheet material opening 43, air is appropriately discharged through the sheet material opening 43 and the upper and lower ends of the insulating member 40. Therefore, the insulating member 40 does not expand too much and get damaged. Also, foreign matters such as burrs in the insulating member 40 and the slot 31 are discharged and removed through the sheet material opening 43 and the like by the air pressure. Note that the timing of jetting air from the air outlet 21 can be appropriately changed according to the opening state of the lower end side of the insulating member 40. For example, the jetting of air from the air outlet 21 may be performed after the insertion of the blade 10 into the slot 31, or before the insertion or simultaneously with the insertion.

[0045] Here, the length of the blade 10 in the width direction (the direction orthogonal to the radial direction of the stator core 30 in the horizontal direction) is formed to be equal to or slightly smaller than the width of the insulating member 40 (the distance between the sheet material flat parts 41, 41). Therefore, the blade 10 can be inserted without contacting the insulating member 40 in combination with the expansion of the insulating member 40 by the air pressure. The insulating member 40 can be formed to have a width of, for example, 3 to 3.5 mm, and the blade 10 can be formed to have a width of, for example, about 3.2 mm.

[0046] Subsequently, as shown in FIG. 6(a), the coil 50 is inserted into the extended insulating member 40 from above. At this time, since the insulating member 40 is expanded by air including its upper end portion, the coil 50 is inserted without contacting the insulating member 40. Further, as shown in FIG. 6(b), as the coil 50 is inserted into the slot 31 (insulating member 40), the blade 10 is removed from the slot 31 (insulating member 40). Thereby, the interference between the blade 10 and the coil 50 is suppressed, and the coil 50 is guided (inserted) into the insulating member 40 in a state where the insulating member 40 is expanded by the blade 10. When the coil 50 is inserted into the slot 31, the operation of assembling the coil 50 to the stator core 30 is completed.

[0047] The above is one embodiment of the coil assembling device 1 of the present invention. Next, the operation and effect realized by the coil assembling device 1 of the present invention will be described below.

[0048] The above-described coil assembling device 1 has the following characteristic configurations (A) to (I). Therefore, the coil assembling device 1 can achieve specific effects that cannot be achieved by the following prior art.

[0049] (A) The coil assembling device 1 of the present embodiment is a coil assembling device 1 for assembling the insulating member 40 and the coil 50 into the slot 31 of the stator core 30, and includes a blade 10 that is inserted into the slot 31 through the insulating member 40 in a state where the insulating member 40 is inserted into the slot 31, and an expanding portion 20 provided on the blade 10 for expanding the insulating member 40 toward the inner surface side of the slot 31. The expanding portion 20 is characterized by including an air discharge port 21 for discharging air outward from the blade 10.

[0050] In the above-described coil assembling device 1, when the blade 10 is inserted into the slot 31 of the stator core 30 into which the insulating member 40 is inserted, the insulating member 40 (for example, a sheet material made of paper, resin, rubber, etc.) can be expanded, so that the insertability of the coil 50 into the slot 31 is improved. Further, since the coil assembling device 1 described above is provided with an air discharge port 21 for discharging (jetting) air toward the outside of the blade 10, the insulating member 40 is further expanded by the air discharged from the air discharge port 21. Therefore, the coil assembling device 1 described above can suppress the contact between the insulating member 40 and the coil 50. As a result, the coil assembling device 1 described above can suppress the damage of the insulating member 40 and the insulating member 40 falling out of the slot 31. Further, the coil assembling device 1 described above can remove dust such as burrs by the wind pressure of the air discharged from the air discharge port 21. Further, the coil assembling device 1 described above can expand the insulating member 40 by jetting air and does not require a separate drive mechanism or the like, so that cost reduction can be expected. Further, the coil assembling device 1 described above can expand the insulating member 40 not only on the side where the blade 10 is inserted (for example, the lower side) but also on the opposite side of the insertion of the blade 10 (for example, the upper side) by jetting air. Therefore, the coil assembling device 1 described above can omit the defense cuff, so that the cost of the coil assembling device 1 can be reduced.

[0051] (B) The coil assembling device 1 of the present embodiment is characterized in that a plurality of air discharge ports 21 are provided at positions facing the insulating member 40.

[0052] With the above-described coil assembling device 1 configured as such, the insulating member 40 can be expanded by the air discharged from the air discharge port 21. As a result, the above-described coil assembling device 1 can expand the insulating member 40 without bringing the insulating member 40 into contact with the blade 10, so that contact between the coil 50 and the insulating member 40 can be suppressed when the coil 50 is assembled. Therefore, the above-described coil assembling device 1 can suppress damage to the insulating member 40 and the insulating member 40 from falling out of the slot 31 of the stator core 30. Further, the above-described coil assembling device 1 can remove dust such as burrs by the wind pressure of the air discharged from the air discharge port 21.

[0053] (C) The coil assembling device 1 of the present embodiment is characterized in that a plurality of blades 10 are provided so as to correspond to each slot 31 of the stator core 30.

[0054] With the above-described coil assembling device 1 configured as such, the coil 50 can be assembled to the plurality of slots 31 of the stator core 30 all at once. Therefore, the above-described coil assembling device 1 can improve the efficiency in the coil assembling work.

[0055] (D) The coil assembling device 1 of the present embodiment is characterized in that the blade 10 has a cavity inside, and the air can be ejected from the air discharge port 21 by allowing air to flow into the cavity.

[0056] With the above-described coil assembling device 1 configured as such, the air discharge port 21 can be easily formed only by forming holes in the blade 10. As a result, the above-described coil assembling device 1 can efficiently eject air from inside the blade 10.

[0057] (E) In the coil assembling device 1 of the present embodiment, when the blade 10 is inserted into the slot 31, the blade 10 includes a pair of blade surfaces 11 that expand in the radial direction of the stator core 30, and a back surface portion of the blade 10 that faces the outside in the radial direction of the stator core 30 and faces the insulating member 40 when inserted into the slot 31. The air discharge port 21 is characterized in that at least one air discharge port 21 is provided in each of the pair of blade surfaces 11 and the back surface portion of the blade 10.

[0058] In the coil assembling device 1 described above, the blade 10 includes a back surface portion of the blade 10 that faces the outside in the radial direction of the stator core 30, and at least one air discharge port 21 is provided in the back surface portion of the blade. Therefore, in the coil assembling device 1 described above, the back surface portion 42 of the sheet material of the insulating member 40 can be positioned by discharging (ejecting) air from the air discharge port 21 of the back surface portion of the blade. Thereby, the coil assembling device 1 described above can assemble the coil 50 with high accuracy.

[0059] (F) The coil assembling device 1 of the present embodiment is characterized in that a plurality of air discharge ports 21 are provided in the blade 10, and the plurality of air discharge ports 21 are arranged in a staggered pattern.

[0060] By adopting such a configuration, the coil assembling device 1 described above can evenly spread the air discharged from the air discharge port 21. Thereby, the coil assembling device 1 described above can evenly spread the insulating member 40, so that when the coil 50 is inserted into the insulating member 40, it is possible to more reliably prevent the coil 50 from contacting the insulating member 40.

[0061] (G) In the coil assembling device 1 of the present embodiment, the blade surface 11 is formed by a set of side end faces of a plurality of blades 10 arranged in parallel along the radial direction of the stator core 30. The plurality of blades 10 are characterized in that the respective tip portions inserted into the slot 31 are arranged in a stepped manner so as to be at an acute angle with respect to the insertion direction.

[0062] By adopting such a configuration, the coil assembling device 1 described above can improve the insertability when inserting the blade 10 into the insulating member 40. Here, the tip of the blade 10 inserted into the slot 31 is preferably arranged to be stepped and shifted so as to have a downward slope from the radially outer side to the radially inner side of the slot 31. Thereby, the coil assembling device 1 described above can insert the blade 10 into the insulating member 40 while positioning the back surface portion 42 of the sheet material of the insulating member 40 located on the radially outer side of the stator core 30 by the back surface portion of the blade 10. Thereby, the coil assembling device 1 described above can assemble the coil 50 with high accuracy.

[0063] (H) The coil assembling device 1 of the present embodiment is characterized in that the blade 10 is inserted into the slot 31 from the direction opposite to the insertion direction of the coil 50 into the slot 31.

[0064] By adopting such a configuration, the coil assembling device 1 described above can suppress the interference between the coil 50 and the blade 10. Therefore, the coil assembling device 1 described above can insert the coil 50 into the slot 31 (insulating member 40) from the direction opposite to the insertion direction of the blade 10, for example, with the blade 10 previously inserted into the slot 31 (insulating member 40). That is, the coil assembling device 1 described above can smoothly assemble the coil 50 in a state where the insulating member 40 is expanded by the insertion of the blade 10 and the ejection of air.

[0065] (I) In the coil assembling device 1 of the present embodiment, the insulating member 40 is formed by bending a sheet material 40A formed to extend along the axial direction of the slot 31 into a pentagonal prism shape along the axial direction. In a state where it is inserted into the slot 31, the sheet material 40A spreads along the radial direction of the stator core 30, and includes a pair of sheet material flat portions 41, 41 facing each other with a space therebetween, a sheet material back portion 42 located outside the radial direction of the stator core 30, and a sheet material opening portion 43 formed at the tip side of the bent portion 45 facing the inner side in the radial direction of the stator core 30 and opened along the axial direction.

[0066] With the above-described configuration, the coil assembling device 1 can provide the insulating member 40 that conforms to the shape of the slot 31 of the stator core 30. Further, with the above-described configuration, when the blade 10 is inserted into the insulating member 40, the back surface portion of the blade 10 can be opposed to the sheet material back portion 42, and the pair of blade surfaces 11 can be opposed to the pair of sheet material flat portions 41, 41. Thereby, the coil assembling device 1 described above can surely jet the air ejected from the air discharge port 21 of the blade 10 toward the sheet material flat portions 41, 41 and the sheet material back portion 42, and can discharge the jetted air from the sheet material opening portion 43, so that the insulating member 40 can be surely expanded.

[0067] The above is the configuration and operation and effect of the embodiment of the present invention. However, the coil assembling device 1 of the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention.

[0068] In this embodiment, the extension part 20 is provided with an air discharge port 21. However, the extension part 20 can utilize various means capable of expanding the insulating member 40 from the inner side to the outer side without contact, not limited to just the air discharge port 21. Also, the air discharge port 21 can be of various shapes and sizes, not limited to just circular holes. Further, in this embodiment, it is assumed that air is discharged from the air discharge port 21. However, if necessary, instead of air or together with air, an inert gas or the like may be discharged. Also, the stator core 30, slots 31, insulating member 40, and blades 10 can be of various shapes, sizes, and materials within the scope of the invention. Also, the blades 10 may not only be non-contact with the insulating member 40 during insertion but may also be in contact within a range where the insulating member 40 is not damaged or displaced.

[0069] In this embodiment, an example is given where a plurality of air discharge ports 21 are provided at positions facing the insulating member 40. However, it is not limited to this, and the air discharge ports 21 can be arranged at various positions. For example, the air discharge ports 21 may be arranged at positions different from the positions facing the insulating member 40. In such a case, it is desirable that the air discharge ports 21 are arranged at positions where air pressure acts in the direction of expanding the insulating member 40. Also, in this embodiment, an example is given where a plurality of blades 10 are provided corresponding to each slot 31 of the stator core 30. However, the number of blades 10 provided can be appropriately changed according to the shape of the stator core 30, slots 31, etc.

[0070] In this embodiment, the blade 10 is exemplified as having a cavity inside, but the blade 10 can also be one without a cavity inside. In such a case, for example, air holes or the like communicating with the air outlet 21 may be formed in the blade 10. Further, in this embodiment, the air outlet 21 is exemplified as having at least one provided in each of the pair of blade surfaces 11, 11 and the blade back surface 12, but the present invention is not limited thereto. The air outlet 21 can be arranged in various ways, such as being provided on either one of the blade surfaces 11, 11 and the blade back surface 12, and the number of air outlets provided can also be changed to various numbers. Further, in this embodiment, the plurality of air outlets 21 are exemplified as being arranged in a staggered pattern, but the air outlets 21 can be arranged not only in a staggered pattern but also in various forms of arrangement. For example, the arrangement of the air outlets 21 can be various arrangements such as a grid pattern, a linear pattern, a curved pattern, a zigzag pattern, etc.

[0071] In this embodiment, an example is given in which the blade surface 11 is formed by the set of side end faces of a plurality of blades 10F, 10M, 10R arranged in parallel along the radial direction of the stator core 30. However, the present invention is not limited to this. For example, the blade surface 11 may be formed by a single blade 10, or the blade surface 11 may be formed by the set of side end faces of two or four or more blades 10. Further, the blade surface 11 may be formed not only by the side end faces of the blades 10, but also by either the front or back surface of the blade 10. That is, the arrangement direction of the blades 10 may not only be orthogonal to the radial direction of the stator core 30, but also be along the radial direction of the stator core 30. Further, in this embodiment, an example is given in which the tip portions of the plurality of blades 10F, 10M, 10R are arranged in a stepped manner so as to be at an acute angle with respect to the insertion direction. However, the present invention is not limited to this. For example, the tip portions of the blades 10F, 10M, 10R, etc. may be formed at an acute angle so as to be continuous instead of being stepped. Further, the inclination angle and inclination direction at the tip portion of the blade 10 can be changed to various inclination angles and inclination directions according to the shapes and sizes of the insulating member 40, the coil 50, the slot 31, etc. Further, in this embodiment, the blades 10F, 10M, 10R are arranged in parallel without an interval, but the plurality of blades 10 may be arranged in parallel with an interval.

[0072] In this embodiment, it is assumed that the blade 10 is inserted into the slot 31 from the direction opposite to the insertion direction of the coil 50 into the slot 31. However, the insertion direction of the blade 10 into the slot 31 can be appropriately changed within the scope of the invention.

[0073] In this embodiment, the insulating member 40 is formed in a substantially pentagonal prism shape and has a sheet material opening 43 facing the inner side in the radial direction of the stator core 30. However, the shape and size of the insulating member 40 can be changed to various shapes and sizes according to the shapes and sizes of the slots 31, coils 50, etc. of the stator core 30. Further, the sheet material opening 43 in the insulating member 40 may be provided as necessary, and the position where it is provided can also be changed as appropriate. Also, various materials such as paper, resin, and rubber can be used for the insulating member 40.

[0074] The above are various embodiments and modifications of the coil assembling device according to the present invention. However, the present invention is not limited to those exemplified in the above-described embodiments and modifications, and it will be easily understood by those skilled in the art that there can be other embodiments within the scope not departing from the teachings and spirit of the claims.

Industrial Applicability

[0075] The present invention can be suitably used for assembling coils to a stator core constituting a motor, a generator, or the like.

Explanation of Reference Numerals

[0076] 1: Coil assembling device 10: Blade 10F: Blade 10M: Blade 10R: Blade 11: Blade surface 12: Blade back surface part 20: Extension part 21: Air discharge port 30: Stator core 31: Slot 31A: Slot flat surface part 31B: Slot back surface part 40: Insulating member 40A: Sheet material 41: Sheet material flat surface part 42: Sheet material back surface part 43: Sheet material opening

Claims

1. A coil assembling device for assembling an insulating member and a coil into slots of a stator core, comprising: a blade that is inserted into the slot through the insulating member with the insulating member inserted into the slot; an expanding portion provided on the blade for expanding the insulating member toward the inner surface side of the slot; and characterized in that: the expanding portion is provided with an air discharge port for discharging air outward from the blade.

2. The coil assembling device according to claim 1, wherein a plurality of the air discharge ports are provided at positions facing the insulating member.

3. The coil assembling device according to claim 1 or 2, wherein the blade has a cavity inside, and the air can be ejected from the air discharge port by allowing air to flow into the cavity.

4. The blade includes: a pair of blade surfaces that expand in the radial direction of the stator core in a state of being inserted into the slot; and a blade back surface portion that faces the outside in the radial direction of the stator core and faces the insulating member in a state of being inserted into the slot. The coil assembling device according to claim 1 or 2, wherein at least one air discharge port is provided on each of the pair of blade surfaces and the blade back surface portion.

Images