Coil insertion device

Abstract

A coil insertion device that reduces load generated by a coil is provided. A coil insertion device (100) relatively moves a ring-shaped coil (10) in which a coil wire is wound from one side in an axial direction to the other side in the axial direction so as to be inserted into a plurality of slots (21) that pass through in the axial direction of a stator core (20), and includes a plurality of blades (110) that move in the axial direction, are disposed on an inner side in a radial direction of the stator core (20), and hold the coil (10); a coil moving mechanism that moves in the axial direction, is disposed on an inner side in the radial direction of the plurality of blades (110), and moves the coil (10); and a control section (130) that controls movement of the plurality of blades (110) and the coil moving mechanism. The control section (130) performs first control in which a relative position of the coil moving mechanism with respect to the plurality of blades (110) is moved in the axial direction, or the coil moving mechanism and the plurality of blades (110) are moved in the axial direction by the same amount.

Description

Technical Field

[0001] This invention relates to a coil insertion device. Background Technology

[0002] Previously, a coil insertion device was known, which inserts a ring-shaped coil bundle wound with coil wire into a slot in a stator core. For example, Japanese Patent Application Publication No. 5-236712 (Patent Document 1) discloses a coil insertion device, which includes: a first movable blade and a second movable blade for holding the coil; a stripper for inserting the coil into the slot; and a first movable blade driving unit and a second movable blade driving unit for driving the first movable blade and the second movable blade. When the first movable blade and the second movable blade are advanced to a first predetermined position in the stator core, the first movable blade driving unit and the second movable blade driving unit retract the second movable blade only within a range where the coil does not disengage, and then advance the first movable blade and the second movable blade further to a second predetermined position. In this state, only the second movable blade descends within the aforementioned range. In addition, Patent Document 1 discloses the following: by repeatedly performing a series of actions of advancing and stopping the first movable blade and advancing and retracting the second movable blade, the friction between the coil and the inner surface of the slot is greatly reduced compared with the previous situation of inserting the entire stroke at once, and a coil with a high duty cycle can be easily inserted.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 5-236712 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] However, when inserting the annular coil bundle into the slot using the coil insertion device described in Patent Document 1, the inventors noticed a problem where the load on the coil could not be sufficiently reduced. The inventors discovered that this problem stemmed from the coil being clamped by the blades.

[0008] In view of the above problems, the object of the present invention is to provide a coil insertion device that reduces the load generated on the coil.

[0009] The coil insertion device according to the first aspect of the present application relatively moves a ring-shaped coil, which is wound with a coil wire, from one side in the axial direction to the other side in the axial direction, so as to be inserted into a plurality of slots that penetrate the stator core in the axial direction, the coil insertion device including: a plurality of blades that move in the axial direction, are disposed on the radially inner side of the stator core, and hold the coil; a coil moving mechanism that moves in the axial direction, is disposed on the radially inner side of the plurality of blades, and moves the coil; and a control section that controls movement of the blades and the coil moving mechanism, the control section performing first control in which the relative position of the coil moving mechanism with respect to the blades is moved in the one side in the axial direction, or the coil moving mechanism and the blades are moved in the one side in the axial direction by the same amount.

[0010] The present application can provide a coil insertion device that reduces load generated on a coil. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a schematic view of a cross section perpendicular to the axial direction of the stator.

[0012] Figure 2 is a schematic view of the coil insertion device of the embodiment.

[0013] Figure 3 is a block diagram of the coil insertion device of the embodiment.

[0014] Figure 4 is a schematic view illustrating the first control of the embodiment.

[0015] Figure 5 is a schematic view illustrating the second control of the embodiment.

[0016] Figure 6 is a schematic view illustrating the third control of the embodiment.

[0017] Figure 7 is a flowchart illustrating the coil insertion method of the embodiment.

[0018] Figure 8 is a schematic view for explaining the technical problem. DETAILED DESCRIPTION

[0019] Hereinafter, the embodiment of the present application will be described with reference to the drawings. In addition, the same reference numerals are assigned to the same or equivalent portions in the following drawings, and the description thereof will not be repeated.

[0020] Furthermore, in the following description, the direction in which the central axis of stator 1 extends, i.e., the direction through which the slot passes, is defined as the "axial direction". One side along the axial direction is designated as the lower (rear) side, and the other side as the upper (front) side. The upper (lower) and lower (fronter) directions are used to determine positional relationships and are not limited to actual directions. That is, the lower 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.

[0021] Furthermore, the direction orthogonal to the central axis of stator 1 is defined as "radial". One side along the radial direction is defined as the inner side, and the other side is defined as the outer side. Moreover, the direction along the arc centered on the central axis of stator 1 is defined as "circumferential".

[0022] Furthermore, in the accompanying drawings used in the following description, features are sometimes shown enlarged for emphasis and convenience. Therefore, the dimensions and proportions of the constituent elements may not be identical to the actual dimensions. Additionally, for the same purpose, non-featured parts are sometimes omitted from the illustrations.

[0023] (stator)

[0024] like Figure 1 As shown, the stator 1 is a component of the motor that interacts with the rotor (not shown) to generate rotational torque. In this embodiment, the stator 1 forms a distributed winding with coil wire wound across several slots 21. The stator 1 includes coils 10 and a stator core 20.

[0025] Stator core

[0026] The stator core 20 is formed into a hollow cylindrical shape. The stator core 20 is formed by overlapping thin silicon steel sheets. A plurality of teeth 23 are formed radially on the stator core 20. Grooves 21 are formed between the teeth 23. The teeth 23 extend radially through the grooves 21. The grooves 21 form groove openings 22 that serve as radial openings. The stator core 20 of this embodiment is a one-piece stator core.

[0027] <coil>

[0028] Coil 10 is a looped coil bundle in which coil wire is wound into a ring shape. In this embodiment, the coil wire is a round wire, but it is not particularly limited and can also be a flat wire, etc.

[0029] The coil 10 has two coil edges and a coil transition portion. The two coil edges are housed within slots 21. Specifically, the slot 21 for housing one coil edge is different from the slot 21 for housing the other coil edge. The slot 21 for housing one coil edge and the slot 21 for housing the other coil edge can be configured as follows: Figure 1 The slots are arranged circumferentially with other slots in between, or they can be arranged adjacent to each other (not shown).

[0030] (coil insertion device)

[0031] Reference Figures 1 to 6 A coil insertion device 100 is described. The coil insertion device 100 relatively moves a ring-shaped coil 10 wound with a coil wire from one side (right side in the figure) to the other side (left side in the figure) in the axial direction of a stator core 20, and inserts the coil 10 into a plurality of slots 21 that pass through the stator core 20 in the axial direction. In detail, the coil insertion device 100 inserts the coil 10 from each slot opening 22 in a manner that spans several slots 21 of the stator core 20. Figure 2

[0032] The coil insertion device 100 includes a plurality of blades 110 as shown in the figure, a stripper 120 as a coil moving mechanism, and a control section 130 as shown in the figure. Figure 2 Figure 3

[0033] <Blade>

[0034] As shown in the figure, the blade 110 holds the coil 10. The blade 110 is disposed on the radially inner side of the stator core 20, and moves in the axial direction. In detail, a plurality of blades 110 are disposed on the same circumference in correspondence with the teeth 23. Figure 2 The blade 110 of the present embodiment is composed of a plurality of blades. The plurality of blades 110 are disposed by a plurality of teeth 23. The blade 110 guides the coil 10 hung on the stripper 120 described later in the axial and radial directions to the slot 21. 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.

[0035] The blade 110 moves in the axial direction by a blade driver (not shown). In detail, the blade 110 is able to move to the other side in the axial direction and move to the one side in the axial direction. The blade driver includes a member that is mounted on the blade 110 and pressed in the axial direction, and a drive source for moving the member in the axial direction.

[0036] As shown in the figure, the blade 110 is a triangle in which a first apex 111 is located on the radially inner side and a second apex 112 and a third apex 113 are located on the radially outer side when viewed in the axial direction. The first apex 111 on the radially inner side is a rounded shape.

[0037] Figure 2 <Stripper>

[0038] The stripper 120 is a coil moving mechanism that moves the coil 10. The stripper 120 is disposed on the radially inner side of the stator core 20, and moves in the axial direction.

[0039]

[0040] ​​​​​The stripper 120 inserts the coil 10 from one side to the other side in the axial direction. The stripper 120 contacts the coil 10. The coil 10 is moved in the axial direction on the radially inner side of the stator core 20 by the stripper 120, and a part of the coil 10 is inserted inside the slot 21 from the slot opening 22. Specifically, the stripper 120 hooks the radially inner side of the coil 10 and pulls up the coil 10 along the blade 110.

[0041] The stripper 120 is moved in the axial direction by a stripper drive (not shown). Specifically, the stripper 120 is movable to the other side in the axial direction and to one side in the axial direction. The stripper drive includes a member that is installed on the stripper 120 and pressed in the axial direction, and a drive source that moves the member in the axial direction.

[0042] <Control unit>

[0043] Figure 2 The control unit 130 shown controls the movement of the blade 110 and the stripper 120. The control unit 130 performs first control in which the relative position of the stripper 120 with respect to the blade 110 is moved to one side in the axial direction, or the stripper 120 and the blade 110 are moved to one side in the axial direction by the same amount. By this first control, the stripper 120 does not press the coil 10 to the other side in the axial direction, and thus it is possible to suppress the coil 10 from being pinched by the blade 110. Therefore, it is possible to reduce the load generated on the coil 10.

[0044] The first control includes:

[0045] a) The advancing amount of the blade 110 > the advancing amount of the stripper 120

[0046] b) The blade 110 advances, and the stripper 120 stops

[0047] c) The blade 110 advances, and the stripper 120 retreats

[0048] d) The blade 110 stops, and the stripper 120 retreats

[0049] e) The retreat amount of the blade 110 ≤ the retreat amount of the stripper 120

[0050] In addition, the advancing is movement from one side to the other side in the axial direction. That is, the direction of the advancing is the direction in which the coil 10 is inserted. The retreat is movement from the other side to one side in the axial direction. That is, the direction of the retreat is the direction opposite to the direction in which the coil 10 is inserted.

[0051] It is preferable that the control unit 130 move the stripper 120 to one side in the axial direction in the first control. That is, as the first control, it is preferable that c) to e) described above. Thereby, it is possible to further suppress the coil 10 from being pinched by the blade 110.

[0052] It is more preferable that the control unit 130 move the stripper 120 to one side in the axial direction in the first control. That is, as the first control, it is more preferable that d) described above. Thereby, it is possible to further suppress the coil 10 from being pinched by the blade 110.Figure 4 As shown, the control unit 130 further moves the blade 110 axially to one side in the first control. That is, the first control is preferably e) as described above. As a result, the coil 10 clamped by the blade 110 can be released. Therefore, the load generated on the coil 10 can be further reduced.

[0053] Furthermore, when the control unit 130 moves the peeler 120 and the blade 110 to the other side of the axial direction in the first control (a) above), the speed at which the peeler 120 moves to the other side of the axial direction is less than the speed at which the blade 110 moves to the other side of the axial direction. As a result, while preventing the coil 10 from being clamped by the blade 110, the efficiency of relative movement of the coil 10 from one side of the axial direction to the other side can be improved.

[0054] The control unit 130 also performs a second control to move the peeler 120 to the other side of the axial direction. In the second control, the relative position of the peeler 120 with respect to the blade 110 is moved to the other side of the axial direction, or the peeler 120 and the blade 110 are moved to the other side of the axial direction by the same amount. Through the second control, the efficiency of inserting the coil 10 into the slot 21 can be improved.

[0055] The second control includes:

[0056] f) The advance of blade 110 is less than or equal to the advance of stripper 120.

[0057] g) Blade 110 stops, and stripper 120 advances.

[0058] Preferred options Figure 5 As shown, the control unit 130 moves the stripper 120 and the blade 110 to the other side of the axial direction in the second control. That is, as the second control, it is preferably f as described above. As a result, the efficiency of inserting the coil 10 into the slot 21 can be further improved.

[0059] Furthermore, in case f) above, it is preferable that the speed at which the control unit 130 moves the peeler 120 to the other side of the axial direction in the second control is greater than the speed at which the blade 110 moves to the other side of the axial direction.

[0060] Furthermore, when the stripper 120 is moved axially to one side by the first control (as described in c) to e), the amount of axial movement of the stripper 120 to one side in the first control is less than the amount of axial movement of the stripper 120 to the other side in the second control. This improves the efficiency of the relative movement of the coil 10 from one axial side to the other.

[0061] The control section 130 also performs a third control that moves the blade 110 to the axial one side. In the third control, the relative position of the stripper 120 with respect to the blade 110 is moved to the axial other side. By the third control, the resistance received by the coil 10 from the blade 110 can be reduced.

[0062] The third control includes:

[0063] h) The retreat amount of the blade 110 > the retreat amount of the stripper 120

[0064] i) The blade 110 retreats, and the stripper 120 stops

[0065] j) The blade 110 retreats, and the stripper 120 advances

[0066] Preferably, as shown in Figure 6 the control section 130 stops the stripper 120 with respect to the stator core 20 in the third control. That is, as the third control, i) above is preferable. Thereby, the third control can be easily implemented.

[0067] The control section 130 performs the first control before performing the third control. Thereby, the resistance received by the coil from the blade can be further reduced. In addition, the first control is performed immediately before the third control is performed. That is, no other control is performed between the third control and the first control. Specifically, it is preferable that the order of the second control, the first control, the third control, and the second control is performed.

[0068] In addition, the third control can be omitted. In the case where the third control is performed, the number of times is not limited, but it is preferable that it is performed once in the insertion of one coil 10. Specifically, the control section 130 performs the third control once until the leading end of the axial other side of the stripper 120 is positioned at the end surface of the axial other side of the stator core 20. Thereby, while reducing the resistance received by the coil from the blade, the efficiency of the relative movement of the coil from the axial one side to the other side can be improved.

[0069] The control section 130 is implemented by, for example, a computing processing device such as a CPU (Central Processing Unit).

[0070] The control section 130 controls the blade drive section and the stripper drive section in order to perform the first to third controls.

[0071] (Coil insertion method)

[0072] Next, with reference to Figures 1 to 7 the coil insertion method of the present embodiment will be described. The coil insertion method of the present embodiment is an insertion method of the coil 10 using the above-described coil insertion device 100.

[0073] First, as shown inFigure 7 As shown, the coil insertion device 100 is disposed at the stator core 20 (step S10). In this step S10, as shown in FIG. 2, the coil insertion device 100 is disposed at the stator core 20. In detail, the coil 10 is disposed so as to be held between the plurality of vanes 110. In addition, the stripper 120 is disposed at the axial one side of the radially central portion on the inner side of the plurality of vanes 110. Figure 2 As shown, the coil 10 and the coil insertion device 100 are disposed at the axial one side of the stator core 20. In detail, the coil 10 is disposed so as to be held between the plurality of vanes 110. In addition, the stripper 120 is disposed at the axial one side of the radially central portion on the inner side of the plurality of vanes 110.

[0074] Next, as shown, the second control of moving the stripper 120 to the axial other side is performed by the control section 130 (step S20). In this second control (step S20), the relative position of the stripper 120 with respect to the vane 110 is moved to the axial other side, or the stripper 120 and the vane 110 are moved to the axial other side by the same amount. Figure 7 Next, as shown, the second control of moving the stripper 120 to the axial other side is performed by the control section 130 (step S20). In this second control (step S20), the relative position of the stripper 120 with respect to the vane 110 is moved to the axial other side, or the stripper 120 and the vane 110 are moved to the axial other side by the same amount.

[0075] Figure 5 In the present embodiment, as shown, the stripper 120 and the vane 110 are moved (advanced) to the axial other side by the control section 130. Thereby, the coil 10 is moved to the axial other side.

[0076] When the coil 10 is advanced in the second control (step S20), the coil 10 is sometimes sandwiched between the first apexes 111 of the adjacent vanes 110.

[0077] Next, as shown, the first control of moving the relative position of the stripper 120 with respect to the vane 110 to the axial one side, or moving the stripper 120 and the vane 110 to the axial one side by the same amount is performed by the control section 130 (step S30). By implementing this first control (step S30), the coil 10 sandwiched by the vane 110 can be released by being lifted to the axial other side by the movement of the vane 110 and the stripper 120 in the first control (step S20). Figure 7 In the present embodiment, as shown, the stripper 120 and the vane 110 are moved (advanced) to the axial other side by the control section 130. Thereby, the coil 10 is moved to the axial other side.

[0078] Figure 4 In the present embodiment, as shown, the stripper 120 and the vane 110 are moved (advanced) to the axial other side by the control section 130. Thereby, the coil 10 is moved to the axial other side.

[0079] The amount of movement of the stripper 120 to the axial one side in the first control (step S30) is smaller than the amount of movement of the stripper 120 to the axial other side in the second control (step S20).

[0080] Next, as shown, the second control of moving the stripper 120 to the axial other side is performed by the control section 130 (step S20). In this second control (step S20), the relative position of the stripper 120 with respect to the vane 110 is moved to the axial other side, or the stripper 120 and the vane 110 are moved to the axial other side by the same amount. Figure 7 ​​As shown, the third control is performed by the control unit 130 to move the blade 110 to one side of the axial direction (step S40). In this third control (step S40), the relative position of the peeler 120 with respect to the blade 110 is moved to the other side of the axial direction.

[0081] In this embodiment, such as Figure 6 As shown, the stripper 120 is stopped by the control unit 130, causing the blade 110 to move axially to one side (reverse). Thus, although the axial movement of the coil 10 is small or non-existent, the coil 10 clamped between the blades 110 can be further released.

[0082] Furthermore, after the first control (step S30), the third control (step S40) is implemented, thus further reducing the resistance experienced by the coil 10 from the blade 110. That is, no other control is performed between the first control (step S30) and the third control (step S40).

[0083] Thus, through the first control (step S30) and the third control (step S40), the coil 10 can be released when it is clamped by the blade 110. In this state, by further implementing the second control (step S20), the coil 10 can be smoothly moved to the other side of the axial direction.

[0084] Furthermore, during the implementation of the second control (step S20), when the coil 10 is clamped by the blade 110, the control unit 130 interrupts the second control and implements the first control (step S30) (if necessary, the third control (step S40) is implemented after the first control). The second control (step S20) is then implemented until the coil 10 reaches the predetermined position within the slot 21.

[0085] Next, the coil insertion device 100 is removed from the stator core 20 (step S50). Specifically, the blade 110 is removed, and the stripper 120 is moved toward one side of the axial direction.

[0086] By performing the above processes (steps S10 to S50), the coil 10 can be inserted into the plurality of slots 21 that extend axially through the stator core 20. As a result, it is possible to manufacture... Figure 1 Stator 1 is shown.

[0087] In addition, in the first control (step S30), the second control (step S20) and the third control (step S40) mentioned above, the coil 10 is moved within a range in which the coil 10 does not detach from the blade 110.

[0088] In addition, when inserting a loop coil 10 into the slot, the third control (step S40) is preferably performed once, but it can also be omitted.

[0089] The inventors have discovered that when inserting the coil 10 into the slot 21, the problem of it being clamped between the blades 110 (particularly between the first apexes 111 of adjacent blades 110) is greater than the mutual friction. Specifically, as... Figure 8 As indicated by arrow X, the triangular area between the rounded corner portions (first apex) of the pair of blades 110 sandwiched on both sides and the top surface of the peeler 120 pulls the coil 10, causing it to move. As a result, the coil 10 wedges into the rounded corner portions of the pair of blades 110 and the gently rounded corner portions of the top surface of the peeler 120, thus locking in place. In contrast, according to the coil insertion device 100 and coil insertion method of this embodiment, it is found that through the first control (step S30), the peeler 120 no longer pushes the coil 10 axially to the other side, thus preventing the coil 10 from being clamped by the blades 110. Therefore, the coil insertion device 100 and coil insertion method of this embodiment can reduce the load generated on the coil 10.

[0090] It should be considered that the embodiments disclosed herein are illustrative in all respects and not limiting. The scope of the invention is set forth in the claims, not the above embodiments, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0091] Symbol Explanation

[0092] 1: Stator

[0093] 10: Coil

[0094] 20: Stator core

[0095] 21: Slot

[0096] 100: Coil insertion device

[0097] 110: Blade

[0098] 111: First Vertex

[0099] 112: Second Vertex

[0100] 113: Third Vertex

[0101] 120: Stripper

[0102] 130: Control Department.

Claims

1. A coil insertion device that moves a ring-shaped coil formed by winding coil wire from one axial side to the other axial side, thereby inserting it into a plurality of slots that pass through the stator core along the axial direction. The coil insertion device includes: Multiple blades, which move axially, are arranged radially inside the stator core and hold the coil; A coil moving mechanism that moves axially, is disposed radially inside the plurality of blades, and moves the coil; as well as The control unit controls the movement of the blades and the coil moving mechanism. The control unit performs a first control, in which the coil moving mechanism is moved axially to one side relative to the blade, or the coil moving mechanism and the blade are moved axially to one side by the same amount. In the first control, at least one of the following controls is performed: Controlling the coil moving mechanism to move at a speed less than the blade to move at a speed less than the speed of the blade to move at the same direction. Controlling the coil movement mechanism to stop, causing the blade to move to the other side of the axis; Control to move the coil moving mechanism to one side of the axial direction and to move the blade to the other side of the axial direction; The coil moving mechanism is moved to one side of the axial direction to stop the control of the blade; and The control ensures that the speed at which the coil moving mechanism moves to one side of the axial direction reaches or exceeds the speed at which the blade moves to one side of the axial direction.

2. The coil insertion device according to claim 1, wherein, In the first control, the control unit moves the coil moving mechanism to one side of the axial direction.

3. The coil insertion device according to claim 2, wherein, In the first control, the control unit further moves the blade toward one side of the axial direction.

4. The coil insertion device according to claim 1, wherein, In the first control, the control unit causes the coil moving mechanism and the blade to move axially to the other side. The speed at which the coil moving mechanism moves to the other side of the axis is less than the speed at which the blade moves to the other side of the axis.

5. The coil insertion device according to any one of claims 1 to 4, wherein, The control unit performs a second control to move the coil moving mechanism to the other side of the axis. In the second control, the coil moving mechanism is moved to the other side of the axial direction relative to the blade, or the coil moving mechanism and the blade are moved to the other side of the axial direction by the same amount.

6. The coil insertion device according to claim 5, wherein, In the second control, the control unit moves the coil moving mechanism and the blade to the other side of the axis.

7. The coil insertion device according to claim 6, wherein, In the second control, the control unit causes the coil moving mechanism to move to the other side of the axis at a speed greater than the speed at which the blade moves to the other side of the axis.

8. The coil insertion device according to claim 5, wherein, The amount of movement of the coil moving mechanism in the first control towards one side of the axial direction is less than the amount of movement of the coil moving mechanism in the second control towards the other side of the axial direction.

9. The coil insertion device according to any one of claims 1 to 4, wherein, The control unit performs a third control to move the blade to one side of the axial direction. In the third control, the coil moving mechanism is moved axially to the other side relative to the relative position of the blade.

10. The coil insertion device according to claim 9, wherein, The control unit stops the coil moving mechanism relative to the stator core in the third control.

11. The coil insertion device according to claim 9, wherein, The control unit performs the first control before performing the third control.

12. The coil insertion device according to claim 9, wherein, The control unit performs the third control once until the front end of the coil moving mechanism on the other side of the axial direction is located at the end face of the stator core on the other side of the axial direction.

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