Coil insertion device

Abstract

To provide a coil insertion device which improves the accuracy of arrangement of a cuff part.SOLUTION: A coil insertion device 100 relatively moves a coil from one side to the other side in the axial direction to insert the coil into a plurality of slots penetrating through a stator core 20 in the axial direction. Insulating paper is arranged between the coil inserted into the slots and the stator core 20, and the insulating paper has a cuff part 41 which protrudes from an axial one side end face to one side of the stator core 20. A cuff part arrangement mechanism 130 is arranged in the slot to move relative to the stator core 20 in the axial direction to contact the cuff part 41 in the circumferential direction.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a coil insertion device.

Background Art

[0002] In the manufacture of a stator insulated with insulating paper and wedges for a coil in a slot of a stator core, a coil insertion device into which a coil and a wedge are inserted into the slot is used. As such a coil insertion device, for example, Japanese Patent Application Laid-Open No. 2011-200107 (Patent Document 1) discloses guiding a wedge using a wedge guide.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the coil insertion device of Patent Document 1 described above, there is a problem in improving the accuracy of the arrangement of the cuff portion, such as a case where the cuff portion protruding from the end face of the stator core interferes with the wedge guide and the cuff portion cannot be correctly arranged.

[0005] An object of the present invention is to provide a coil insertion device that improves the accuracy of the arrangement of the cuff portion.

Means for Solving the Problems

[0006] A coil insertion device according to a first aspect of the present invention is a coil insertion device that inserts a coil into a plurality of slots penetrating the stator core in the axial direction by relatively moving the coil from one side in the axial direction to the other, wherein insulating paper is placed between the coil inserted into the slot and the stator core, and the insulating paper has a cuff portion that protrudes toward one side from the axial end face of the stator core, and is provided with a cuff portion arrangement mechanism that is arranged in the slot, moves relative to the stator core in the axial direction, and is in contact with the cuff portion in the circumferential direction. [Effects of the Invention]

[0007] The present invention can provide a coil insertion device that improves the accuracy of the cuff placement. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic diagram of a cross-section perpendicular to the axial direction of the stator. [Figure 2] Figure 2 is an enlarged view of region II in Figure 1. [Figure 3] Figure 3 is a schematic diagram showing a coil insertion device according to an embodiment. [Figure 4] Figure 4 is a schematic diagram showing a coil insertion device according to an embodiment. [Figure 5] Figure 5 is a schematic diagram showing a coil insertion device according to an embodiment. [Figure 6] Figure 6 is an enlarged view of the coil insertion device according to the embodiment. [Figure 7] Figure 7 is an exploded view of the coil insertion device according to the embodiment. [Figure 8] Figure 8 is a plan view of the cuff arrangement mechanism of the embodiment. [Figure 9] Figure 9 is a front view of the biasing portion of the cuff arrangement mechanism of the embodiment. [Figure 10] Figure 10 is a flowchart of the coil insertion method according to the embodiment. [Figure 11] Figure 11 is a schematic diagram of the coil insertion method for the comparative example. [Figure 12]Figure 12 is an enlarged schematic diagram of the stator of the comparative example. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and their descriptions will not be repeated.

[0010] Furthermore, in the following explanation, the direction in which the central axis of the stator 1 extends, i.e., the direction in which the slot 21 penetrates, will be referred to as the "axial direction." One side along the axial direction will be the lower (rear) side, and the other side will be the upper (front) side. The up and down (front and back) directions are used to specify the positional relationship and do not limit the actual direction. That is, the downward direction does not necessarily mean the direction of gravity. The axial direction is not particularly limited and includes the vertical direction, the horizontal direction, and directions intersecting these directions.

[0011] Furthermore, the direction perpendicular to the central axis of stator 1 is defined as the "radial direction." In addition, the direction along the arc centered on the central axis of stator 1 is defined as the "circumferential direction."

[0012] Furthermore, the drawings used in the following explanation may be enlarged for convenience to emphasize distinctive features. Therefore, the dimensions and proportions of each component may not necessarily be the same as those of the actual components. Also, for the same reason, non-distinguishable parts may be omitted from the illustrations.

[0013] (Stator) As shown in Figure 1, the stator 1 is a component of the motor and interacts with a rotor (not shown) to generate rotational torque. In this embodiment, the stator 1 is a distributed winding in which the coil 10 is wound across several slots 21. The stator 1 comprises the coil 10, the stator core 20, the wedge 30, and the insulating paper 40.

[0014] <Stator Core> The stator core 20 is formed in a hollow cylindrical shape. The stator core 20 is formed by stacking thin silicon steel plates. A plurality of teeth 23 are formed radially in the stator core 20. Slots 21 are formed between the teeth 23. The teeth 23 extend radially through the slots 21. A slot opening 22, which is a radial opening, is formed in the slot 21. The stator core 20 of the present embodiment is an integral stator core.

[0015] <Coil> The coil 10 is formed by winding a coil wire in a ring shape. The coil wire of the present embodiment is a round wire, but is not particularly limited and may be a flat wire or the like.

[0016] The coil 10 has two coil side portions and a coil connection portion. The two coil side portions are accommodated in the slots 21. Specifically, the slot 21 in which one coil side portion is accommodated and the slot 21 in which the other coil side portion is accommodated are different. The slot 21 in which one coil side portion is accommodated and the slot 21 in which the other coil side portion is accommodated may be arranged circumferentially via another slot as shown in FIG. 1, or may be adjacent to each other (not shown).

[0017] <Wedge> The wedge 30 is arranged between the coil 10 inserted into the slot 21 and the stator core 20. In FIG. 1, the wedge 30 is arranged between the coil 10 and the slot opening 22. The wedge 30 closes the slot opening 22. The wedge 30 insulates the stator core 20 and the coil 10. The axial length of the wedge 30 is larger than the axial length of the slot 21.

[0018] The wedge 30 of the present embodiment is U-shaped in the axial view. Specifically, as shown in FIG. 1, it includes a circumferential portion extending in the circumferential direction and two radial portions extending radially outward from both ends of the circumferential portion. The circumferential portion is located radially inward. The circumferential portion and the radial portion may be formed of one member, or different members may be connected to each other.

[0019] <Insulating paper> As shown in Figure 1, the insulating paper 40 covers the coil 10 inserted into the slot 21. The insulating paper 40 is positioned between the coil 10 inserted into the slot 21 and the stator core 20. More specifically, the insulating paper 40 is positioned along teeth that demarcate the space in the slot 21 except for the radially inner side. The insulating paper 40 in this embodiment is U-shaped. Specifically, it includes a circumferential portion extending in the circumferential direction and two radial portions extending radially inward from both ends of the circumferential portion. The circumferential portion is located radially outward. In Figure 1, the opening of the insulating paper 40 and the opening of the wedge 30 are in opposite directions.

[0020] As shown in Figure 2, the insulating paper 40 has a cuff portion 41 that protrudes toward one side from one axial end face of the stator core 20. The insulating paper 40 also has a second cuff portion (not shown) that protrudes toward the other side from the other axial end face of the stator core 20. The cuff portion 41 protrudes from the axial end face of the stator core 20 and is folded back toward the circumferential outer side of the slot 21. In detail, the cuff portion 41 extends toward one side from one axial end face of the stator core 20 and is folded back to extend toward the other side. The second cuff portion extends toward the other side from the other axial end face of the stator core 20 and is folded back to extend toward one side.

[0021] (Coil insertion device) The coil insertion device 100 will be described with reference to Figures 1 to 9. As shown in Figures 1 and 2, the coil insertion device 100 inserts the coil 10 into a plurality of slots 21 that penetrate the stator core 20 in the axial direction by moving it relative to one side in the axial direction from one side to the other (from the right side to the left side in Figures 3 to 5). In detail, the coil insertion device 100 inserts the coil 10, in which the coil wire is wound in a ring shape, from each slot open 22 so as to straddle two slots 21 of the stator core 20.

[0022] Furthermore, the coil insertion device 100 of this embodiment inserts a wedge 30, which is positioned between the coil 10 inserted in the slot 21 and the stator core 20, into the slot 21 that penetrates the stator core 20 in the axial direction, from one side in the axial direction to the other. In this case, the coil insertion device 100 inserts a wedge 30 into each of the multiple slots 21 of the stator core 20.

[0023] As shown in Figures 3 to 5, the coil insertion device 100 includes a plurality of blades 110, a stripper 120 as a coil moving mechanism, a cuff placement mechanism 130, an alignment tool 140, and a wedge insertion mechanism 150 as shown in Figure 6.

[0024] <Blade> As shown in Figure 3, the multiple blades 110 hold the coil 10. The blades 110 are arranged circumferentially around the stator core 20, radially inside the stator core 20 and radially outside the stripper 120, and extend axially. The stripper 120 and the multiple blades 110 allow the coil 10 to be easily inserted into the slot 21.

[0025] The blade 110 is positioned via a plurality of teeth 23. The blade 110 guides the coil 10, which is hooked onto the stripper 120 (described later), along the axial and radial directions to the slot 21. The blade 110 has a shape that allows it to be positioned in the slot open 22. The blade 110 is a rod-shaped member that extends in the axial direction. The blade 110 is a movable blade that moves in the axial direction.

[0026] In this embodiment, the radially outer edge of the blade 110 is located radially inward from the radially inner edge of the stator core 20, but it may also be located radially outward from the radially inner edge of the stator core 20.

[0027] The blade 110 moves axially by a blade drive unit (not shown). More specifically, the blade 110 can move axially to the other side and axially to one side. The blade drive unit includes a member attached to the blade 110 that pushes axially and a drive source that moves this member axially.

[0028] As shown in Figure 7, the coil insertion device 100 of this embodiment further includes a blade holder 111 for holding the blade 110.

[0029] <Strippers> The stripper 120 is a coil moving mechanism that moves the coil 10. The stripper 120 is positioned radially inward of the stator core 20 and moves relative to the stator core 20 in the axial direction. The stripper 120 moves the coil 10 relative to the stator core 20 from one side to the other in the axial direction. The stripper 120 allows the coil 10 to be easily inserted into the slot 21.

[0030] The stripper 120 makes contact with the coil 10. The stripper 120 causes the coil 10 to move axially along the radially inward side of the stator core 20, while a portion of the coil 10 is inserted into the slot 21 from the slot open 22. Specifically, the stripper 120 hooks onto the radially inward side of the coil 10 and pulls the coil 10 up along the blade 110.

[0031] The stripper 120 moves axially by a stripper drive unit (not shown). More specifically, the stripper 120 can move axially to the other side and axially to one side. The stripper drive unit is attached to the stripper 120 and includes a member that pushes axially and a drive source that moves this member axially.

[0032] The stripper 120 has a shape that is positioned in the slot open 22. Specifically, as shown in Figure 3, the stripper 120 includes a shaft 121 and a large-diameter section 122. The shaft 121 extends in the axial direction. The large-diameter section 122 is provided at the other axial end of the shaft 121. The radial inner side of the annular coil 10 is hooked onto the large-diameter section 122. The large-diameter section 122 has a larger diameter than the diameter of the shaft 121. The central axes of the shaft 121 and the large-diameter section 122 are the same. The diameter of the large-diameter section 122 is the distance between the blades 110.

[0033] <Alignment Tool> As shown in Figures 3 and 4, the alignment tool 140 is positioned radially inward of the stator core 20 and moves axially relative to the stator core 20. The alignment tool 140 is also positioned on the opposite axial side of the stripper 120.

[0034] The alignment tool 140 holds the other axial side of multiple blades 110. The alignment tool 140 moves axially with the blades 110. This stabilizes the movement of the blades 110 and reduces wear on the blades 110.

[0035] <Cuff section arrangement mechanism> As shown in Figures 3 to 6, the cuff portion placement mechanism 130 is positioned within the slot 21, moves axially relative to the stator core 20, and contacts the cuff portion 41 in the circumferential direction. The cuff portion placement mechanism 130, which contacts the cuff portion 41 in the circumferential direction, allows the cuff portion 41 to be positioned at a predetermined position in the circumferential direction. Therefore, the accuracy of the placement of the cuff portion 41 can be improved.

[0036] As shown in Figure 7, the cuff placement mechanism 130 is attached to the alignment tool 140. This allows for easy installation of the cuff placement mechanism 130. Furthermore, the cuff placement mechanism 130 can be easily removed from the axial side of the stator core 20. The cuff placement mechanism 130 is attached to the alignment tool 140 by fastening members such as screws.

[0037] As shown in Figure 8, the cuff placement mechanism 130 includes a main body 131, a biasing part 132, and a holding part 133. The main body 131, the biasing part 132, and the holding part 133 may be separate components, but in this embodiment they are composed of a single component.

[0038] The main body 131 is cylindrical in shape when viewed in the axial direction. An opening 131a is provided in the center of the main body 131. The shaft member of the alignment tool 140 is attached to the opening 131a.

[0039] The biasing portion 132 is positioned radially outward of the main body portion 131. Multiple biasing portions 132 are also arranged at intervals in the circumferential direction.

[0040] The biasing unit 132 generates a circumferential biasing force. The biasing unit 132 biases the cuff portion 41 in a direction that widens the circumferential spacing within the slot 21. The biasing unit 132 allows the cuff portion 41 to move to a width wider than the slot 21. Therefore, the precision of the placement of the cuff portion 41 can be further improved.

[0041] The biasing portion 132 is made of a material that allows the cuff portion 41 to be widened beyond the circumferential width of the slot 21. The biasing portion 132 is made of, for example, an elastic material.

[0042] As shown in Figure 6, at least a portion of the biasing portion 132 overlaps radially with the wedge guide 151. This ensures that the biasing portion 132 can reliably contact the cuff portion 41 in the circumferential direction.

[0043] In this embodiment, a portion of the biasing portion 132 overlaps radially with the wedge guide 151, and the remaining portion of the biasing portion 132 is located radially outward from the wedge guide 151.

[0044] As shown in Figure 9, the axial end of the biasing portion 132 is fixed in a circumferential position. The axial end of the biasing portion 132 is a leaf spring that is movable in the circumferential direction. The leaf spring of the biasing portion 132 can provide a circumferential biasing force to the cuff portion 41.

[0045] The biasing portion 132 has a shape that allows it to pass through one slot 21 in the axial direction. Here, the biasing portion 132 has a first biasing portion 132a positioned on one side in the circumferential direction within one slot 21, and a second biasing portion 132b positioned on the other side in the circumferential direction. The first biasing portion 132a moves the cuff portion 41 to one side in the circumferential direction, and the second biasing portion 132b moves the cuff portion 41 to the other side in the circumferential direction.

[0046] Specifically, the biasing section 132 has a structure in which the leaf spring splits into two branches from the other axial end toward the one axial end. One of the two branches is the first biasing section 132a, and the other is the second biasing section 132b. The first biasing section 132a and the second biasing section 132b constitute the one axial end of the biasing section 132. The other axial portions of the first biasing section 132a and the second biasing section 132b constitute the other axial end of the biasing section 132. The other axial end of the biasing section 132 is the joint between the first biasing section 132a and the second biasing section 132b.

[0047] The first biasing portion 132a and the second biasing portion 132b extend in the axial direction. This increases the contact area between the first biasing portion 132a and the second biasing portion 132b and the cuff portion 41. As a result, the cuff portion 41 can be easily moved on both sides in the circumferential direction.

[0048] The axial ends of the first biasing portion 132a and the second biasing portion 132b are inclined to be separated circumferentially within a single slot 21, while the axial ends of the first biasing portion 132a and the second biasing portion 132b extend parallel to the axial direction without inclination. As a result, contact between the first biasing portion 132a and the second biasing portion 132b and the cuff portion 41 is buffered.

[0049] The retaining portion 133 is positioned radially inward of the biasing portion 132 and holds the biasing portion 132. As shown in Figure 8, the circumferential width of the retaining portion 133 is smaller than the circumferential width of the biasing portion 132. This reduces friction between the cuff portion arrangement mechanism 130 and the stator core 20. In this embodiment, the retaining portion 133 is positioned on the axial side opposite the first biasing portion 132a and the second biasing portion 132b.

[0050] As shown in Figure 8, the retaining portion 133 extends radially outward from the main body portion 131. The retaining portion 133 is located radially between the main body portion 131 and the biasing portion 132. The retaining portion 133 may be made of an elastic material or an inelastic material.

[0051] <Wedge insertion mechanism> As shown in Figure 6, the wedge insertion mechanism 150 inserts the wedge 30, which is placed between the coil 10 inserted into the slot 21 and the stator core 20, from one axial side to the other. The wedge insertion mechanism 150 includes a wedge guide 151 which is positioned on one axial side and guides the wedge 30. The cuff positioning mechanism 130 prevents the cuff portion 41 from interfering with the wedge guide 151, even when the wedge guide 151 is used to guide the wedge 30. Therefore, high precision in the positioning of the cuff portion 41 can be maintained, and the wedge 30 can be positioned circumferentially outside the insulating paper 40 within the slot 21.

[0052] The wedge insertion mechanism 150 further includes a wedge pusher that pushes the wedge 30 axially from one side to the other.

[0053] (Coil insertion method) Next, the coil insertion method of this embodiment will be described with reference to Figures 1 to 10. The coil insertion method of this embodiment is a method for inserting the coil 10 using the coil insertion device 100 described above.

[0054] First, as shown in Figure 10, insulating paper 40 is placed between the coil 10 inserted into the slot 21 and the stator core 20 (step S1). In this step S1, as shown in Figure 2, a cuff portion 41 is formed that protrudes toward one side from one axial end face of the stator core 20.

[0055] Next, the coil insertion device 100 is installed on the stator core 20 (step S2). In step S2, as shown in Figure 3, the coil 10 and the coil insertion device 100 are positioned on one axial side of the stator core 20. Specifically, the coil 10 is positioned so as to be held between the multiple blades 110. In addition, the stripper 120 is positioned at the radial center of the multiple blades 110, on one axial side.

[0056] Furthermore, the wedge guide 151 is positioned on one axial side, between adjacent slots 21. The wedge 30 is then positioned so as to be supported by the wedge pusher of the wedge insertion mechanism 150.

[0057] Next, the cuff placement mechanism 130 is moved from one axial side to the other axial side, bringing the cuff placement mechanism 130 into circumferential contact with the cuff portion 41 (step S3). In step S3, the cuff placement mechanism 130 positions the cuff portion 41 at a predetermined position in the circumferential direction.

[0058] Specifically, when the cuff portion placement mechanism 130 is moved from one axial side to the other axial side, and the biasing portion 132 of the cuff portion placement mechanism 130 is positioned near one end face of the stator core 20, the biasing portion 132 acts a biasing force on the cuff portion 41 in the circumferential direction outward. More specifically, the first biasing portion 132a moves the cuff portion 41 to one side in the circumferential direction, and the second biasing portion 132b moves the cuff portion 41 to the other side in the circumferential direction. As a result, the cuff portion 41 is held in a position that spreads out in the circumferential direction. That is, the cuff portion 41 can be positioned circumferentially outside the width of the slot 21. Here, the cuff portion placement mechanism 130 pushes the cuff portion 41 onto the teeth 23 at one end face of the stator core 20.

[0059] Next, as shown in Figure 4, the stripper 120 is moved axially from one side to the other to insert the coil 10 into the slot 21 (step S4). Specifically, the blade 110, stripper 120, cuff placement mechanism 130, alignment tool 140, and wedge pusher are moved axially from one side to the other. In step S4, the cuff placement mechanism 130 positions the cuff portion 41 in a predetermined position in the circumferential direction, and the coil 10 is then inserted into the slot 21.

[0060] Specifically, in step S4, the stripper 120 moves axially to the other side together with the blade 110. During this movement, the blade 110 is positioned radially inward of the stator core 20. In this embodiment, the blade drive unit advances (lifts) the blade 110, and the stripper drive unit advances the stripper 120. As the inside of the coil 10 moves while hooked onto the stripper 120, the coil 10 moves axially to the other side.

[0061] In step S4, the cuff placement mechanism 130 also moves axially from one side to the other. This biases the insulating paper 40 in the slot 21 outward in the circumferential direction. However, in step S4, the cuff placement mechanism 130 does not come into contact with the coil 10.

[0062] In step S4, the wedge pusher also moves from one axial side to the other. As a result, the wedge 30, guided by the wedge guide 151, moves into the slot 21 on the other axial side.

[0063] By moving the blade 110 and stripper 120 in this manner, the coil 10 can be inserted into the slot 21 of the stator core 20, as shown in Figure 5. In step S3, depending on the insertion resistance of the coil 10, a step may be performed to move at least one of the blade 110 and stripper 120 from one side to the other in the axial direction.

[0064] Furthermore, the wedge 30 can be inserted into slot 21 by moving the wedge pusher.

[0065] Next, the coil insertion device 100 is removed from the stator core 20 (step S5). Specifically, the blade 110, cuff placement mechanism 130, and alignment tool 140 are removed from the stator core 20. The stripper 120 and wedge pusher are also moved downwards.

[0066] By performing the above steps (steps S1 to S5), the coils 10 can be inserted into multiple slots 21 that penetrate the stator core 20 in the axial direction. As a result, the stator 1 shown in Figure 1 can be manufactured.

[0067] (Effects and Benefits) The effects and advantages of the coil insertion device 100 of this embodiment will be explained in comparison with the comparative example coil insertion device shown in Figure 11. The comparative example coil insertion device does not have the cuff portion arrangement mechanism 130 of this embodiment.

[0068] If the cuff portion 41 does not spread out in the circumferential direction, when the wedge guide 151 guides the wedge 30, the cuff portion 41 may extend circumferentially inward from the slot 21, as shown in the upper cuff portion 41 in Figure 11. In this case, the cuff portion 41 does not fit into the recess 151a of the wedge guide 151, causing a collision between the wedge 30 and the cuff portion 41. Also, as shown in Figure 12, the wedge 30 may be inserted between the insulating paper 40 and the slot 21. In this way, the wedge 30 may buckle due to the cuff portion 41 interfering with the wedge guide 151.

[0069] On the other hand, the coil insertion device 100 of this embodiment includes a cuff portion placement mechanism 130. Therefore, even if the cuff portion 41 is not spread out in the circumferential direction before inserting the coil 10 and when guiding the wedge 30 with the wedge guide 151, the cuff portion placement mechanism 130 can position the cuff portion 41 in the correct position (in this case, circumferentially outward from the slot 21). When the wedge 30 is moved to the other axial side in this state, the cuff portion 41 is more likely to enter the recess 151a of the wedge guide 151. In this way, the cuff portion placement mechanism 130 contacts the cuff portion 41 in the circumferential direction, thereby suppressing interference between the cuff portion 41 and the wedge guide 151. Therefore, as shown in Figure 2, the wedge 30 is more likely to be inserted circumferentially inward from the insulating paper 40, thus suppressing buckling of the wedge 30.

[0070] Furthermore, in the coil insertion device 100 of this embodiment, damage to the insulating paper 40 in the slot 21 can be suppressed, thus maintaining insulation properties and preventing a decrease in withstand voltage.

[0071] (Variation 1) In the embodiment described above, the cuff portion arrangement mechanism 130 is in circumferential contact with the cuff portion 41 that protrudes toward one side from one axial end face of the stator core 20. The cuff portion arrangement mechanism 130 may or may not be in circumferential contact with the cuff portion that protrudes toward the other side from the other axial end face of the stator core 20.

[0072] (Modification 2) In the embodiments described above, a biasing section 132 having a first biasing section 132a and a second biasing section 132b was used as an example, but the invention is not limited thereto. For example, one leaf spring in a biasing section 132 may be just one.

[0073] (Variation 3) In the embodiment described above, the cuff placement mechanism 130 is attached to the alignment tool 140, but is not limited to this. The cuff placement mechanism 130 may also be attached to the stripper 120, the wedge guide 151, or the like.

[0074] (Modification 4) In the embodiments described above, the wedge insertion mechanism 150 includes a wedge pusher, but is not limited thereto. A member for moving the wedge axially from one side to the other can be used as appropriate.

[0075] (Variation 5) In the embodiment described above, as shown in Figure 1, the two slots 21 into which the coil is inserted are one slot 21 and the other slot 21 separated by four slots 21, but the embodiment is not limited to this.

[0076] (Experimental variation 6) In the embodiment described above, a method of inserting one coil 10 into two slots 21 was used as an example. Multiple coils 10 may be inserted simultaneously into four or more slots 21.

[0077] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than by the embodiments described above, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of symbols]

[0078] 1: Status 10: Coil 20: Stator core 21: Slot 30: Wedge 40: Insulating paper 41: Cuff section 100: Coil insertion device 110: Blade 120: Stripper 130: Cuff placement mechanism 132: Sustaining part 132a: First biasing part 132b: Second biasing part 133: Holding part 140: Alignment Tool 150: Wedge insertion mechanism 151: Wedge Guide

Claims

1. A coil insertion device for inserting coils into multiple slots that penetrate the stator core in the axial direction by relatively moving the coils from one side to the other in the axial direction, An insulating paper is placed between the coil inserted into the slot and the stator core. The insulating paper has a cuff portion that protrudes toward one side from one axial end face of the stator core, The cuff portion arrangement mechanism is provided, which is located within the slot, moves relative to the stator core in the axial direction, and is in contact with the cuff portion in the circumferential direction. The cuff arrangement mechanism includes a biasing portion that generates a biasing force in the circumferential direction. The biasing portion biases the slot in a direction that widens the circumferential spacing of the cuff portion, The biasing portion is made of an elastic member, A coil movement mechanism is positioned radially inward of the stator core, moves relative to the stator core in the axial direction, and moves the coil relative to the stator core from one side to the other in the axial direction. A plurality of blades are arranged radially inward of the stator core and radially outward of the coil movement mechanism, extending axially and holding the coil, and are positioned in a circumferential direction of the stator core. An alignment tool is positioned radially inward of the stator core and moves relative to the stator core in the axial direction, Furthermore, The cuff placement mechanism is attached to the alignment tool. The alignment tool is a coil insertion device that holds the other axial side of a plurality of the blades.

2. A coil insertion device for inserting coils into multiple slots that penetrate the stator core in the axial direction by relatively moving the coils from one side to the other in the axial direction, An insulating paper is placed between the coil inserted into the slot and the stator core. The insulating paper has a cuff portion that protrudes toward one side from one axial end face of the stator core, The cuff portion arrangement mechanism is provided, which is located within the slot, moves relative to the stator core in the axial direction, and is in contact with the cuff portion in the circumferential direction. The cuff arrangement mechanism includes a biasing portion that generates a biasing force in the circumferential direction. The biasing portion biases the slot in a direction that widens the circumferential spacing of the cuff portion, The other end of the biasing portion in the axial direction is fixed in a circumferential position. A coil insertion device in which the axial end of the biasing portion is a leaf spring that is movable in the circumferential direction.

3. A coil insertion device for inserting coils into multiple slots that penetrate the stator core in the axial direction by relatively moving the coils from one side to the other in the axial direction, An insulating paper is placed between the coil inserted into the slot and the stator core. The insulating paper has a cuff portion that protrudes toward one side from one axial end face of the stator core, The cuff portion arrangement mechanism is provided, which is located within the slot, moves relative to the stator core in the axial direction, and is in contact with the cuff portion in the circumferential direction. The cuff arrangement mechanism includes a biasing portion that generates a biasing force in the circumferential direction. The biasing portion biases the slot in a direction that widens the circumferential spacing of the cuff portion, The biasing portion is located within one of the slots, A first biasing unit is positioned on one side in the circumferential direction, A second biasing unit is positioned on the other side in the circumferential direction, It has, The cuff portion arrangement mechanism further includes a holding portion that is arranged radially inward of the biasing portion and holds the biasing portion, The holding portion is arranged on the axial side opposite to the first biasing portion and the second biasing portion. The first biasing unit and the second biasing unit are coil insertion devices that extend in the axial direction.

4. The coil insertion device according to claim 2 or 3, further comprising a coil moving mechanism disposed radially inside the stator core, which moves relative to the stator core in the axial direction and moves the coil relative to the stator core from one side to the other in the axial direction.

5. The coil insertion device according to claim 4, further comprising a plurality of blades arranged in a circumferential direction of the stator core, extending axially, and holding the coil, on the radially inner side of the stator core and radially outer side of the coil moving mechanism.

6. The system further includes a wedge insertion mechanism for inserting a wedge, which is positioned between the coil inserted into the slot and the stator core, from one axial side to the other. The coil insertion device according to any one of claims 1 to 5, wherein the wedge insertion mechanism is arranged on one side in the axial direction and includes a wedge guide for guiding the wedge.

7. The system further comprises a wedge guide positioned on one axial side and guiding a wedge positioned between the coil inserted into the slot and the stator core, The coil insertion device according to any one of claims 1 to 6, wherein at least a portion of the biasing portion overlaps radially with the wedge guide.

8. The other end of the biasing portion in the axial direction is fixed in a circumferential position. The coil insertion device according to claim 1, wherein the axial end of the biasing portion is a leaf spring that is movable in the circumferential direction.

9. The cuff portion arrangement mechanism further includes a holding portion that is arranged radially inward of the biasing portion and holds the biasing portion, The coil insertion device according to any one of claims 1 to 8, wherein the circumferential width of the holding portion is smaller than the circumferential width of the biasing portion.

10. The biasing portion is located within one of the slots, A first biasing unit is positioned on one side in the circumferential direction, A second biasing unit is positioned on the other side in the circumferential direction, A coil insertion device according to claim 1 or 2, having the following features.

11. The cuff portion arrangement mechanism further includes a holding portion that is arranged radially inward of the biasing portion and holds the biasing portion, The holding portion is arranged on the axial side opposite to the first biasing portion and the second biasing portion. The coil insertion device according to claim 10, wherein the first biasing portion and the second biasing portion extend in the axial direction.

12. The stator further comprises an alignment tool positioned radially inward of the stator core and moving axially relative to the stator core, The coil insertion device according to any one of claims 2 to 5, wherein the cuff placement mechanism is attached to the alignment tool.

13. A coil insertion device for inserting coils into a plurality of slots penetrating the stator core in the axial direction by relatively moving the coils from one side in the axial direction to the other side, An insulating paper is placed between the coil inserted into the slot and the stator core. The insulating paper has a cuff portion that protrudes toward one side from one axial end face of the stator core, The cuff portion arrangement mechanism is provided, which is located within the slot, moves relative to the stator core in the axial direction, and is in contact with the cuff portion in the circumferential direction. The cuff arrangement mechanism includes a biasing portion that generates a biasing force in the circumferential direction. The biasing portion biases the slot in a direction that widens the circumferential spacing of the cuff portion, The biasing portion is made of an elastic member, The system further includes a wedge insertion mechanism for inserting a wedge, which is positioned between the coil inserted into the slot and the stator core, from one axial side to the other. The wedge insertion mechanism is a coil insertion device that includes a wedge guide arranged on one side in the axial direction for guiding the wedge.

14. A coil insertion device for inserting coils into a plurality of slots penetrating the stator core in the axial direction by relatively moving the coils from one side in the axial direction to the other side, An insulating paper is placed between the coil inserted into the slot and the stator core. The insulating paper has a cuff portion that protrudes toward one side from one axial end face of the stator core, The cuff portion arrangement mechanism is provided, which is located within the slot, moves relative to the stator core in the axial direction, and is in contact with the cuff portion in the circumferential direction. The cuff arrangement mechanism includes a biasing portion that generates a biasing force in the circumferential direction. The biasing portion biases the slot in a direction that widens the circumferential spacing of the cuff portion, The biasing portion is made of an elastic member, The system further comprises a wedge guide positioned on one axial side and guiding a wedge positioned between the coil inserted into the slot and the stator core, A coil insertion device wherein at least a portion of the biasing portion overlaps radially with the wedge guide.

15. A coil insertion device for inserting coils into a plurality of slots penetrating the stator core in the axial direction by relatively moving the coils from one side in the axial direction to the other side, An insulating paper is placed between the coil inserted into the slot and the stator core. The insulating paper has a cuff portion that protrudes toward one side from one axial end face of the stator core, The cuff portion arrangement mechanism is provided, which is located within the slot, moves relative to the stator core in the axial direction, and is in contact with the cuff portion in the circumferential direction. The cuff arrangement mechanism includes a biasing portion that generates a biasing force in the circumferential direction. The biasing portion biases the slot in a direction that widens the circumferential spacing of the cuff portion, The biasing portion is made of an elastic member, The other end of the biasing portion in the axial direction is fixed in a circumferential position. A coil insertion device in which the axial end of the biasing portion is a leaf spring that is movable in the circumferential direction.

16. A coil insertion device for inserting coils into a plurality of slots penetrating the stator core in the axial direction by relatively moving the coils from one side in the axial direction to the other side, An insulating paper is placed between the coil inserted into the slot and the stator core. The insulating paper has a cuff portion that protrudes toward one side from one axial end face of the stator core, The cuff portion arrangement mechanism is provided, which is located within the slot, moves relative to the stator core in the axial direction, and is in contact with the cuff portion in the circumferential direction. The cuff arrangement mechanism includes a biasing portion that generates a biasing force in the circumferential direction. The biasing portion biases the slot in a direction that widens the circumferential spacing of the cuff portion, The biasing portion is made of an elastic member, The cuff portion arrangement mechanism further includes a holding portion that is arranged radially inward of the biasing portion and holds the biasing portion, A coil insertion device in which the circumferential width of the holding portion is smaller than the circumferential width of the biasing portion.

17. A coil insertion device for inserting coils into a plurality of slots penetrating the stator core in the axial direction by relatively moving the coils from one side in the axial direction to the other side, An insulating paper is placed between the coil inserted into the slot and the stator core. The insulating paper has a cuff portion that protrudes toward one side from one axial end face of the stator core, The cuff portion arrangement mechanism is provided, which is located within the slot, moves relative to the stator core in the axial direction, and is in contact with the cuff portion in the circumferential direction. The cuff arrangement mechanism includes a biasing portion that generates a biasing force in the circumferential direction. The biasing portion biases the slot in a direction that widens the circumferential spacing of the cuff portion, The biasing portion is made of an elastic member, The biasing portion is located within one of the slots, A first biasing unit is positioned on one side in the circumferential direction, A second biasing unit is positioned on the other side in the circumferential direction, It has, The cuff portion arrangement mechanism further includes a holding portion that is arranged radially inward of the biasing portion and holds the biasing portion, The holding portion is arranged on the axial side opposite to the first biasing portion and the second biasing portion. The first biasing unit and the second biasing unit are coil insertion devices that extend in the axial direction.

Images