Coil assembly method and coil assembly device

Abstract

The coil assembly device includes a blade, which is inserted into the slot of the stator core when the insulating paper is inserted into the slot. In the coil assembly method, the insulating paper is inserted into the slot of the stator core, the blade is inserted into the slot into which the insulating paper has been inserted, and the coil is inserted into the slot into which the blade is inserted in a direction opposite to the direction in which the blade is inserted. When the coil is inserted into the slot, the blade is pulled out of the slot along with the insertion of the coil into the slot.

Description

Technical Field

[0001] The invention relates to a coil assembling method and a coil assembling device. Background Art

[0002] When a coil is inserted into a slot provided with insulating paper of a stator core, the insulating paper may be displaced and slip out of the slot due to contact between the coil and the insulating paper or friction between the coil and the insulating paper.

[0003] Therefore, Japanese Patent Publication No. 2020-124055 describes the following method of assembling a coil: inserting a cylindrically formed insulating paper into a slot of a stator core so that both ends of the insulating paper protrude from the slot, forming the corresponding two ends of the insulating paper protruding from the slot into a cone shape, and inserting the coil into the slot from the side not supported by the supporting plate while one of the corresponding two ends of the insulating paper is supported by the supporting plate. In addition, Japanese Patent Publication No. 2020-124055 describes the following: Since the end of the insulating paper on the side not supported by the supporting plate is hooked on the stator core, and the other end of the insulating paper is supported by the supporting plate, the insulating paper is prevented from being offset or slipping when the coil is inserted into the slot. Summary of the invention

[0004] In Japanese Patent Application Laid-Open No. 2020-124055, it is necessary to process both ends of the insulating paper into a cone shape, and the assembly of the coil takes extra time. In addition, it is necessary to make both ends of the insulating paper protrude from the slot and process the protruding portion into a cone shape, and accordingly, additional insulating paper material is required. Therefore, extra time and cost are required.

[0005] The present invention has been achieved in order to solve the above-mentioned problems, and an object of the present invention is to provide a coil assembling method and a coil assembling device which can more easily suppress the deviation of insulating paper.

[0006] The coil assembly method involved in the present invention comprises: a process of inserting insulating paper into the slots of the stator core; a process of inserting blades into the slots into which the insulating paper has been inserted; and a process of inserting the coil into the slots into which the blades have been inserted in a direction opposite to the direction in which the blades are inserted, and in the process of inserting the coil, the blades are pulled out of the slots as the coils are inserted into the slots.

[0007] The coil assembly device involved in the present invention includes a blade, which is inserted into the slot of the stator core in a state where the insulating paper is inserted into the slot of the stator core, the insulating paper is inserted into the slot of the stator core, the blade is inserted into the slot into which the insulating paper has been inserted, and the coil is inserted into the slot into which the blade is inserted in a direction opposite to the direction in which the blade is inserted. When the coil is inserted into the slot, the blade is pulled out of the slot along with the insertion of the coil into the slot.

[0008] According to the coil assembly method and coil assembly device involved in the present invention, the coil can be inserted in a state where the insulating paper is unfolded by using the blade. Therefore, there is no need to make the two ends of the insulating paper protrude from the groove and process the protruding parts into a cone shape. In addition, there is no need to use additional insulating paper materials. Thus, a coil assembly method and a coil assembly device that can more easily suppress the deviation of the insulating paper can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention are described with reference to the accompanying drawings, in which like reference numerals represent like parts, and in which:

[0010] Figure 1 It is a perspective view showing a protective cover support of the coil assembly device according to the first embodiment of the present invention.

[0011] Figure 2 The diagram schematically shows a state of adjacent claws of the sheath support of the coil assembly device according to the first embodiment of the present invention when viewed from the center of the sheath support toward the radially outer side.

[0012] Figure 3 It means Figure 1 The cross-sectional view of the protective cover support, the stator core, and the insulating paper when the III-III cutting line is cut is shown.

[0013] Figure 4 This is a flowchart showing the coil assembling method according to the first embodiment of the present invention. DETAILED DESCRIPTION

[0014] Implementation Method 1

[0015] Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following Embodiment 1. In addition, the following description and drawings are appropriately simplified for the purpose of clarifying the description.

[0016] Figure 1 1 is a perspective view showing a defense cuff support 101 of the coil assembly device 100 according to the first embodiment. Figure 1 As shown, the protective sleeve support 101 is a ring-shaped device, which is located on the stator core 200 (refer to Figure 2 ) to correct the coil when assembling the coil in the stator core 200. Specifically, the protective sleeve support 101 is arranged on an axial end face of the stator core 200, the end face on the side where the coil is inserted, when assembling the coil in the stator core 200. In other words, the protective sleeve support 101 is arranged on the side of the stator core 200 opposite to the side where the blades described later are inserted.

[0017] In addition, if Figure 1 As shown, the protective cover support 101 includes a claw portion 102, a guide portion 103, an operating portion 104, a holding plate 105, a rotating device 106, and the like.

[0018] The claw portion 102 is provided on the teeth 200A of the stator core 200 (see Figure 2 ) corresponding to the position. In other words, the protective cover support 101 has the same number of claws 102 as the number of teeth 200A provided on the stator core 200. In addition, the claws 102 are supported by the guide portion 103 so as to be able to move in and out from the inner peripheral surface of the protective cover support 101 along the radial direction of the protective cover support 101 toward the central axis of the protective cover support 101. In addition, Figure 1 The claw portion 102 is shown to protrude from the inner peripheral surface of the protective cover support 101. The inner peripheral surface of the protective cover support 101 is composed of the inner peripheral surface of the holding plate 105, the inner peripheral surface of the operating portion 104, and the inner peripheral surface of the guide portion 103 (see Figure 3 ).

[0019] The guide portion 103 is an annular member that supports the claw portion 102 in such a manner that the claw portion 102 can move in and out in the radial direction of the stator core 200. Specifically, the guide portion 103 includes a groove portion 103A for sliding the claw portion 102, and a pin 103B fixed to the claw portion 102 and moving along the groove portion 103A together with the claw portion 102. In other words, the guide portion 103 includes the same number of groove portions 103A and pins 103B as the claw portion 102. In addition, the groove portion 103A is provided in the radial direction of the protective cover support 101. In addition, the pin 103B has a height that can be inserted through a hole portion 104A formed in the action portion 104 described later.

[0020] The operating portion 104 is an annular member and includes an arc-shaped hole 104A through which the pin 103B fixed to the claw 102 can be inserted. In other words, the operating portion 104 is formed with the same number of holes 104A as the claws 102 .

[0021] The holding plate 105 is an annular member, and holds the operating portion 104 so as to be rotatable about the central axis of the protective cover support 101 relative to the guide portion 103 .

[0022] The rotating device 106 is a motor, and rotates the operating portion 104 around the central axis of the protective cover support 101 relative to the guide portion 103 .

[0023] Furthermore, the action part 104 rotates relative to the guide part 103 about the central axis of the protective cover support 101, so that the pin 103B slides in the arc-shaped hole part 104A and moves along the groove part 103A. As a result, the claw part 102 slides in the groove part 103A and moves in and out along the radial direction of the protective cover support 101 from the inner peripheral surface of the protective cover support 101 toward the central axis of the protective cover support 101. Figure 1 As shown, when the claws 102 protrude (extend) from the inner circumference of the protective cover support 101, a U-shaped path having substantially the same shape as the shape of the slot 200B is formed by the adjacent claws 102 and the inner circumference of the protective cover support 101. And the coil inserted into the slot 200B can be corrected by this path.

[0024] Figure 2 The coil assembly device 100 is schematically shown as viewed from the center of the sheath support 101 toward the radially outer side. Figure 2 Only the portion of the coil assembly device 100 corresponding to the claws 102, 102 adjacent to each other of the protective cover support 101 is shown. Figure 2 In FIG. 1 , the thick arrow indicates the insertion direction of the coil (not shown) into the slot 200B of the stator core 200 .

[0025] like Figure 2 As shown, the coil assembly device 100 includes a blade 107 and a support platform 108 in addition to the protective cover support 101. Figure 2 In order to clearly illustrate the diagram, the dimensions of the protective cover support 101, the blade 107, and the support stand 108 are changed from the actual dimensions. Figure 2 In the figure, for the sake of clarity, the hatching indicating the cross section of the support platform 108 is omitted.

[0026] The blade 107 is provided so as to be able to move forward / retract toward the slot 200B of the stator core 200 supported by the support table 108 in the coil assembly device 100. Specifically, the support table 108 is formed with a hole portion 108A through which the blade 107 can pass, and the blade 107 is inserted into the slot 200B through the hole portion 108A of the support table 108. In other words, the coil assembly device 100 has the same number of blades 107 as the slots 200B of the stator core 200. And, the blade 107 is inserted into the slot 200B of the stator core 200 into which the insulating paper 300 has been inserted, by a power source such as an electric motor of the coil assembly device 100 (not shown). Specifically, the blade 107 is inserted into the end surface insertion slot 200B on the opposite side of the coil side from the two axial end surfaces of the stator core 200. Furthermore, by utilizing this power source, when the coil is inserted into the slot 200B, the vane 107 is pulled out from the slot 200B along with the insertion of the coil into the slot 200B.

[0027] Thus, the coil can be inserted in a state where the blade 107 unfolds the insulating paper 300 in the slot 200B of the stator core 200. Specifically, the blade 107 can prevent the insulating paper 300 from being offset or sliding off the slot 200B due to the contact between the coil and the insulating paper 300 or the friction between the coil and the insulating paper 300 when the coil is inserted into the slot 200B. In addition, the insulating paper 300 is inserted in a shape along the inner wall of the slot 200B. In other words, when the shape of the slot 200B is substantially a "コ" shape (U-shape), the insulating paper 300 is bent into the "コ" shape (U-shape) and inserted into the slot 200B.

[0028] The support table 108 abuts against the end surface of the stator core 200 on the opposite side of the side where the protective cover support 101 is arranged, and supports the stator core 200. In addition, the support table 108 is operated by a power source (not shown) such as a motor of the coil assembly device 100. In addition, the support table 108 supports the stator core 200 so that the stator core 200 can move toward or away from the protective cover support 101.

[0029] The support base 108 has a hole 108A through which the blade 107 can pass. Thus, the blade 107 can be inserted into the slot 200B of the stator core 200 supported by the support base 108 through the hole 108A.

[0030] In addition, if Figure 2 As shown, the width W1 of the gap between the opposite ends of the insulating paper 300 inserted into the slot 200B of the stator core 200 is greater than the width W2 of the gap between the claws 102 and the claws 102 adjacent to each other. As a result, the end surface of the insulating paper 300 on the side of the protective cover support 101 (hereinafter referred to as the "upper end surface") abuts against the end surface of the claw 102 on the side of the stator core 200 (hereinafter referred to as the "lower end surface"). Therefore, it is possible to prevent the insulating paper 300 from shifting toward the protective cover support 101 side due to the friction between the blade 107 and the insulating paper 300 when the blade 107 is inserted into the slot 200B.

[0031] in addition, Figure 3 Shown with Figure 1 The cross section of the protective cover support 101, the stator core 200 and the insulating paper 300 when the III-III cutting line is cut is shown. Figure 3 The claw portion 102 is shown in a state where it protrudes from the inner peripheral surface of the protective cover support 101. Figure 3 In FIG. 1 , the thick arrow indicates the insertion direction of the coil (not shown) into the slot 200B of the stator core 200 .

[0032] like Figure 3As shown, the thickness h1 of at least the portion of the guide portion 103 corresponding to the stator core 200 is thicker than the thickness h2 of the claw portion 102. Therefore, when the stator core 200 is brought close to the protective cover support 101 by the support stand 108, or when the blade 107 is inserted into the slot 200B of the stator core 200, if the stator core 200 is tilted, the end surface of the stator core 200 on the protective cover support 101 side (hereinafter referred to as the "upper end surface") contacts the end surface of the guide portion 103 on the stator core 200 side (hereinafter referred to as the "lower end surface"). Therefore, it is possible to prevent the stator core 200 from tilting significantly, and reduce the friction between the blade 107 and the insulating paper 300 generated when the blade 107 is inserted into the slot 200B due to the tilt of the stator core 200. In addition, it is possible to reduce the friction between the coil and the insulating paper 300 generated when the coil is inserted into the slot 200B due to the tilt of the stator core 200. Therefore, it is possible to reduce the displacement of the insulating paper 300 due to the inclination of the stator core 200 .

[0033] Furthermore, the size of the gap between the upper end surface of the stator core 200 and the lower end surface of the guide portion 103 is such that the effect obtained by the width W1 being greater than the width W2, which is the width of the gap between the opposite ends of the insulating paper 300 inserted into the slot 200B and the width W2 being the width of the gap between the claw portions 102 adjacent to each other, is not offset. In other words, the size of the gap between the upper end surface of the stator core 200 and the lower end surface of the guide portion 103 is such that the upper end surface of the insulating paper 300 can abut against the lower end surface of the claw portion 102 even if the stator core 200 is tilted.

[0034] Below, refer to Figure 4 The coil assembling method according to the first embodiment will be described.

[0035] First, if Figure 4 As shown, the insulating paper 300 is inserted into the slot 200B of the stator core 200 (step S1 ).

[0036] Then, the coil assembly device 100 extends the claw portion 102 so as to protrude from the inner peripheral surface of the protective cover support 101 (step S2 ).

[0037] Then, the coil assembly device 100 brings the support stand 108 on which the stator core 200 is placed close to the protective cover support 101 and raises the stator core 200 (step S3 ).

[0038] Then, the coil assembly device 100 inserts the blade 107 into the slot 200B into which the insulating paper 300 has been inserted (step S4 ).

[0039] Then, the coil assembly device 100 inserts the coil into the slot 200B into which the blade 107 is inserted in the direction opposite to the direction in which the blade 107 is inserted (step S5). At this time, the coil assembly device 100 pulls the blade 107 out of the slot 200B as the coil is inserted into the slot 200B.

[0040] According to the coil assembly device 100 and the coil assembly method involved in the present embodiment 1 described above, the coil can be inserted in the state where the insulating paper 300 is unfolded by using the blade 107. Therefore, there is no need to make the two ends of the insulating paper 300 (the end on the protective cover support 101 side, and the end on the opposite side of the end) protrude from the groove 200B and process the protruding part into a cone shape. In addition, there is no need to use additional materials for the insulating paper 300. In addition, in the coil assembly method involved in the present embodiment 1, although the process of inserting the blade 107 is required separately, the time required for this process is very short compared to the process of processing the two ends of the insulating paper 300 into a cone shape. It can be completed. Thus, a coil assembly method and a coil assembly device 100 that can more easily suppress the deviation of the insulating paper 300 can be provided.

[0041] In addition, the width W1 of the gap between the opposite ends of the insulating paper 300 inserted into the slot 200B of the stator core 200 is greater than the width W2 of the gap between the adjacent claws 102. As a result, the upper end surface of the insulating paper 300 abuts against the lower end surface of the claw 102, which can prevent the insulating paper 300 from shifting toward the protective cover support 101 side due to the friction between the blade 107 and the insulating paper 300 when the blade 107 is inserted into the slot 200B.

[0042] In addition, the thickness h1 of at least the portion of the guide portion 103 corresponding to the stator core 200 is thicker than the thickness h2 of the claw portion 102. As a result, the friction between the coil and the insulating paper 300 generated when the coil is inserted into the slot 200B due to the inclination of the stator core 200 can be reduced. Therefore, the displacement of the insulating paper 300 caused by the inclination of the stator core 200 can be reduced.

[0043] In addition, the present invention is not limited to the above-mentioned embodiment, and can be appropriately modified within the scope not departing from the gist.

Claims

1. A coil assembly method, comprising: The steps of inserting insulating paper into the slots of the stator core; inserting blades into the slots into which the insulating paper has been inserted; and inserting a coil into the slots into which the blades have been inserted in a direction opposite to the direction in which the blades are inserted. In the step of inserting the coil, the blade is pulled out of the slot as the coil is inserted into the slot.

2. A coil assembly device, The invention comprises a blade which is inserted into the slot of the stator core in a state where the insulating paper is inserted into the slot of the stator core. inserting the insulating paper into the slot of the stator core, inserting the blade into the slot into which the insulating paper has been inserted, and inserting the coil into the slot into which the blade has been inserted in a direction opposite to the direction in which the blade is inserted, When the coil is inserted into the slot, the blade is pulled out of the slot along with the insertion of the coil into the slot.

3. The coil assembly device according to claim 2, wherein: A protective cover support is further provided, wherein the protective cover support has claws corresponding to the teeth of the stator core. The protective sleeve support is arranged on the side of the stator core opposite to the side where the blades are inserted, The width of the gap between the opposite ends of the insulating paper inserted into the slot of the stator core is greater than the width of the gap between the claws adjacent to each other.

4. The coil assembly device according to claim 3, wherein: A support stand is further provided, which supports the stator core so that the stator core can move toward or away from the protective cover support. The protective cover support further includes a guide portion, the guide portion supporting the claw portion so that the claw portion can move in and out in the radial direction of the stator core. The guide portion may have a thickness greater than that of the claw portion at least at a portion corresponding to the stator core.

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