Insertion tool

Abstract

To provide an insertion tool capable of smoothly inserting a slot paper sheet into a slot of a stator core with a minimum protruding amount while restraining buckling.SOLUTION: An insertion tool includes a fixing guide 20 and a movable guide 40 that can move between a closed position close to the fixing guide 20 and an open position separated away therefrom. Inside a connection path 10, the fixing guide 20 has an end portion fixing guide surface 31 and lateral portion fixing guide surfaces 32a, 32b each having a tapered shape, and the movable guide 40 has an end portion movable guide surface 61 and a lateral portion movable guide surface 62 each having a tapered shape, and an end of a slot paper sheet 3 inserted into the connection path 10 when the movable guide 40 is in the closed position is guided into an opening portion 2a of a slot 2 by the end portion fixing guide surface 31, the lateral portion fixing guide surfaces 32a, 32b, the end portion movable guide surface 61, and the lateral portion movable guide surface 62, and the slot paper sheet 3 is pressed and accommodated into the slot 2 through the opening portion 2a when the movable guide 40 is in the open position.SELECTED DRAWING: Figure 13

Description

Technical Field

[0001] The present invention relates to an insertion jig.

Background Art

[0002] Patent Document 1 discloses a forming device for slot paper to be inserted into slots of a stator core. This forming device includes a roller having a convex portion protruding toward one surface of the base paper of the slot paper at an end portion, and having a pressing portion for pressing one surface of the base paper, and a mold having a concave portion having a shape corresponding to the convex portion and pressing the other surface of the base paper. The mold is formed to protrude in the axial direction of the roller more than the pressing portion. By forming the slot paper with this forming device, breakage of the slot paper is prevented and the bending quality of the slot paper is improved.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the slot paper is guided and inserted into the slot by an insertion jig arranged on the stator core while being held by a pusher. However, when inserting into the slot of the stator core, the end portion of the slot paper may be caught by the opening of the slot and may not be smoothly inserted into the slot. For this reason, a guide plate for guiding the end portion of the slot paper to the opening of the slot of the stator core is overlapped on the stator core and the insertion work of the slot paper is performed. However, when using the guide plate, a protrusion occurs in which the slot paper protrudes from the stator core by the thickness of this guide plate.

[0005] Also, when inserting the slot paper into the slots of the stator core, it is desirable to press the corner portion with a waist with a pusher to suppress buckling. In this case, however, the pusher protrudes outside the slot paper, and the pusher interferes with the insertion jig.

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to provide an insertion jig capable of smoothly inserting the slot paper into the slots of the stator core with a minimum allowance while suppressing buckling.

Means for Solving the Problems

[0007] In order to achieve the above object, the insertion jig of the present invention is An insertion jig that is disposed at an opening of a slot formed in a stator core and guides an end portion of the slot paper to the opening of the slot when inserting the slot paper into the slot with a pusher, A fixed guide having a communication path for guiding to the slot, A movable guide provided movably between a closed position close to the fixed guide and an open position separated therefrom, the movable guide having a groove portion that forms a part of the communication path, Comprising Inside the communication path, the fixed guide has a tapered fixed guide surface for guiding the slot paper to the slot, and the movable guide has a tapered movable guide surface for guiding the slot paper to the slot. With the movable guide disposed at the closed position, an end portion of the slot paper is inserted into the communication path and guided to the opening of the slot by the fixed guide surface and the movable guide surface. With the movable guide disposed at the open position, the slot paper is pushed into the slot from the opening by the pusher and accommodated.

[0008] According to the insertion jig with this configuration, when the movable guide is arranged in the closed position, the slot paper can be smoothly guided to the opening of the slot by the fixed guide surface of the fixed guide and the movable guide surface of the movable guide. Then, by arranging the movable guide in the open position, while avoiding interference with the pusher, the slot paper can be smoothly pushed into and accommodated in the slot without getting caught on the opening of the slot. Moreover, by using this insertion jig, since it is not necessary to arrange a guide plate on the stator core to insert the slot paper, there is no extra cost due to the thickness of the guide plate, and the slot paper can be accommodated in the slot with a minimum extra cost.

Advantages of the Invention

[0009] According to the insertion jig of the present invention, the slot paper can be smoothly inserted into the slot of the stator core with a minimum extra cost while suppressing buckling.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of the stator core 1 and the pusher 6 in which the insertion jig 100 according to the present embodiment is installed. As shown in FIG. 1, the insertion jig 100 is a jig used when inserting the slot paper 3 into the slot 2 of the stator core 1, and is disposed at the opening 2a of the slot 2 of the stator core 1.

[0012] The stator core 1 is formed in a substantially cylindrical shape. This stator core 1 is configured, for example, by laminating a plurality of non-oriented electromagnetic steel sheets 1a formed in an annular shape by press working.

[0013] The stator core 1 has a plurality of teeth 4. These teeth 4 project radially inward, and coils are wound around these teeth 4. The slots 2 are formed by the gap portions formed between the respective teeth 3, and are formed in a rectangular shape in plan view.

[0014] The slot paper 3 inserted into the slot 2 is an insulating sheet, for example, a laminated sheet formed by laminating a resin film, a non-woven fabric, and the like. The slot paper 3 is inserted into the slot 2 of the stator core 1 to insulate the stator core 1 and the coil.

[0015] FIG. 2 is a schematic view seen from the tip side of the pusher 6 in which the insertion portion 6a is inserted into the slot paper 3. As shown in FIG. 2, the slot paper 3 is formed into a cylindrical shape having a rectangular shape in plan view with a pair of side portions 3a and a pair of end portions 3b. The slot paper 3 has its edges overlapped at one of the end portions 3b. The slot paper 3 is inserted and accommodated into the slot 2 from one end side with respect to the slot 2 in a state of being attached to the pusher 6.

[0016] The pusher 6 has an insertion portion 6a, a side pressing portion 6b, and a corner pressing portion 6c. With the slot paper 3 inserted into the insertion portion 6a, the side pressing portion 6b presses the side portion at the end of the slot paper 3, and the corner pressing portion 6c presses the corner portion at the end of the slot paper 3. In this way, the pusher 6 presses the high-strength corner portion together with the side portion of the slot paper 3, and pushes the slot paper 3 into the slot 2 while suppressing buckling.

[0017] The insertion jig 100 is a jig for guiding the slot paper 3 to the slot 2 to be inserted in the stator core 1 when the slot paper 3 is pushed in by the pusher 6. The insertion jig 100 has a communication passage 10 having a rectangular cross section, and the slot paper 3 is inserted into the communication passage 10 by the pusher 6 (see FIG. 1). Then, the end of the slot paper 3 inserted into the communication passage 10 is guided to the opening 2a of the slot 2.

[0018] FIG. 3 is an exploded perspective view of the insertion jig 100. FIG. 4 is a top view of the insertion jig 100. FIG. 5 is a cross-sectional view along the communication passage 10 of the insertion jig 100. FIG. 6 is a bottom view of the insertion jig 100.

[0019] As shown in FIGS. 3 to 6, the insertion jig 100 includes a fixed guide 20 and a movable guide 40. The fixed guide 20 has a main body block 21, a side block 22, and an end face block 23. The side block 22 is assembled to the side surface of the main body block 21 to which the former 24 is attached via a separator 25 and a former 26. The end face block 23 is assembled to the upper side of the end face of the main body block 21 to which the side block 22 is assembled. Thereby, a communication passage 10 surrounded by the main body block 21, the side block 22, and the end face block 23 is formed in the fixed guide 20. Further, the fixed guide 20 has a groove portion 27 on the lower side than the end face block 23. Further, in the end face block 23 constituting the fixed guide 20, a guide plate portion 23a protruding into the communication passage 10 is formed over the longitudinal direction of the communication passage 10, and the slot paper 3 is guided by this guide plate portion 23a.

[0020] The movable guide 40 is assembled to the lower side of the end face block 23 with respect to the fixed guide 20. The movable guide 40 is movably supported by two guide bolts 41 whose ends are fastened to the fixed guide 20. The movable guide 40 has a groove portion 42 on the assembling side to the fixed guide 20. This groove portion 42 constitutes a part of the communication passage 10 together with the groove portion 27 of the fixed guide 20.

[0021] FIG. 7 is a perspective view of the insertion jig 100 with the movable guide 40 disposed in the closed position. FIG. 8 is a perspective view of the insertion jig 100 with the movable guide 40 disposed in the open position. As shown in FIGS. 7 and 8, the movable guide 40 is movable between a closed position (the state in FIG. 7) close to the fixed guide 20 and an open position (the state in FIG. 8) spaced apart from the fixed guide 20. When the movable guide 40 is moved to the open position, its movement is restricted by the head 41a of the guide bolt 41. The movable guide 40 has a handle 43 on its side portion. And the movable guide 40 can be easily moved by gripping the handle 43.

[0022] Further, the insertion jig 100 is provided with a stopper 60. This stopper 60 is formed in a U shape having an engaging recess 61 (see FIG. 3). This stopper 60 is mounted between the movable guide 40 and the head 41a of the guide bolt 41 so that the guide bolt 41 enters the engaging recess 61 in a state where the movable guide 40 is disposed at the closed position (see FIG. 1). Thereby, the movement of the movable guide 40 disposed at the closed position is restricted.

[0023] As shown in FIGS. 4 and 5, inside the communication passage 10, the fixed guide 20 has a tapered end fixed guide surface (fixed guide surface) 31 for guiding the slot paper 3 to the slot 2 and side fixed guide surfaces (fixed guide surfaces) 32a, 32b. The end fixed guide surface 31 is provided at the end of the communication passage 10, and the side fixed guide surfaces 32a, 32b are provided on both side portions of the communication passage 10. These end fixed guide surface 31 and side fixed guide surfaces 32a, 32b are formed in a tapered shape that gradually inclines toward the center of the communication passage 10 in the insertion direction of the slot paper 3 into the communication passage 10. Further, a relief recess 33 through which the side portion pressing portion 6b of the pusher 6 passes is formed between the side fixed guide surfaces 32a, 32b.

[0024] Also, inside the communication path 10, the movable guide 40 has a tapered end movable guide surface (movable guide surface) 61 and side movable guide surfaces (movable guide surfaces) 62 that guide the slot paper 3 to the slot 2. The end movable guide surface 61 is provided at the end of the communication path 10, and the side movable guide surfaces 62 are provided on both side portions of the communication path 10. These end movable guide surface 61 and side movable guide surfaces 62 are formed in a tapered shape that gradually inclines toward the center of the communication path 10 in the insertion direction of the slot paper 3 into the communication path 10.

[0025] In this way, by providing the end fixed guide surface 31, the side fixed guide surfaces 32a, 32b, the end movable guide surface 61, and the side movable guide surfaces 62, the insertion jig 100 is configured such that the communication path 10 has a shape that narrows downward. And this communication path 10 has the same shape as the slot 2 of the stator core 1 or a shape slightly smaller than the slot 2 when viewed from the lower surface side of the insertion jig 100 (see FIG. 6).

[0026] FIG. 9 is a top view of the insertion jig 100 with the movable guide 40 disposed in the open position. FIG. 10 is a cross-sectional view of the insertion jig 100 along the communication path 10 with the movable guide 40 disposed in the open position. FIG. 11 is a bottom view of the insertion jig 100 with the movable guide 40 disposed in the open position. As shown in FIGS. 9 to 11, in the insertion jig 100, when the movable guide 40 moves to the open position and separates from the fixed guide 20, a gap is formed between the side fixed guide surfaces 32a, 32b and the side movable guide surfaces 62, and these gaps serve as escape recesses 63 through which the corner pressing portions 6c of the pusher 6 pass.

[0027] Next, the case of inserting the slot paper 3 into the slot 2 of the stator core 1 using the insertion jig 100 will be described. FIG. 12 is a cross-sectional view along the insertion direction showing how the slot paper 3 is inserted into the slot 2 using the insertion jig 100. FIG. 13 is a cross-sectional view along the insertion direction showing how the slot paper 3 is inserted into the slot 2 using the insertion jig 100. FIG. 14 is a cross-sectional view along the insertion direction showing how the slot paper 3 is inserted into the slot 2 using the insertion jig 100.

[0028] As shown in FIG. 12, the insertion jig 100 is placed on the upper part of the stator core 1, and the communication passage 10 of the insertion jig 100 is aligned with the slot 2 of the stator core 1. At this time, in the insertion jig 100, the movable guide 40 is arranged in a closed position close to the fixed guide 20. In this state, the pusher 6 with the insertion portion 6a inserted into the slot paper 3 is lowered toward the insertion jig 100 (see arrow D in FIG. 12).

[0029] As shown in FIG. 13, the pusher 6 is inserted into the communication passage 10 from above the insertion jig 100. Then, together with the insertion portion 6a of the pusher 6, the slot paper 3 is inserted into the communication passage 10, and while the slot paper 3 is guided by the guide plate portion 23a, the end portion of the slot paper 3 is guided to the opening 2a of the slot 2 by the end portion fixed guide surface 31, the side portion fixed guide surfaces 32a, 32b, the end portion movable guide surface 61, and the side portion movable guide surface 62. And a part of the end portion of this slot paper 3 is inserted into the slot 2.

[0030] As shown in FIG. 14, the movable guide 40 is arranged in an open position separated from the fixed guide 20, and the pusher 6 is further inserted into the communication passage 10. Then, together with the insertion portion 6a of the pusher 6, the slot paper 3 is pushed into the slot 2. At this time, the side portion pressing portion 6b of the pusher 6 is passed through the relief recess 33 between the side portion fixed guide surfaces 32a, 32b, and the corner portion pressing portion 6c of the pusher 6 is passed through the relief recess 63 formed by the movement of the movable guide 40 to the open position. Thereby, without interfering with the insertion jig 100, the pusher 6 is inserted into the communication passage 10, and the slot paper 3 held by the insertion portion 6a of the pusher 6 is pushed into and accommodated in the slot 2.

[0031] Next, reference examples will be described. FIG. 15 is a perspective view of the insertion jig 81, the guide plate 90, and the pusher 6 according to the reference example. FIG. 16 is a cross-sectional view of the stator core 1 in which the slot paper 3 is inserted into the slot 2 by the insertion jig 81 according to the reference example.

[0032] As shown in FIG. 15, in the reference example, the slot paper 3 is inserted into the slot 2 using the insertion jig 81 having the communication passage 80 with a size such that the side pressing portion 6b and the corner pressing portion 6c of the pusher 6 do not interfere. Therefore, in the reference example, a guide plate 90 for guiding the end portion of the slot paper 3 to the opening 2a of the slot 2 in the stator core 1 is placed on the upper surface of the stator core 1 so that the end portion of the slot paper 3 is not caught by the opening 2a of the slot 2. This guide plate 90 has a plurality of guide holes 91 corresponding to the slots 2, and is placed on the upper surface of the stator core 1 so that these guide holes 91 communicate with the slots 2.

[0033] In the reference example, the insertion jig 81 is placed on this guide plate 91, and the slot paper 3 is inserted into the slot 2 by the pusher 6 through the communication passage 80 formed in the insertion jig 81 and the guide holes 91 of the guide plate 91.

[0034] However, in this reference example, as shown in FIG. 16, by using the guide plate 90, a protrusion P occurs in which the slot paper 3 protrudes from the slot 2 in the stator core 1 by at least the thickness of the guide plate 90.

[0035] On the other hand, according to the insertion jig 100 according to the present embodiment, while avoiding interference with the pusher 6, the slot paper 3 can be smoothly inserted into the slot 2 without being caught by the opening 2a of the slot 2. Moreover, by using this insertion jig 100, since it is not necessary to arrange the guide plate 90 on the stator core 1 to insert the slot paper 3, the protrusion P corresponding to the thickness of the guide plate 90 does not occur, and the slot paper 3 can be accommodated in the slot 2 with a minimum protrusion.

Explanation of Reference Numerals

[0036] 1 Stator core 2 Slots 2a Opening 3 Slot paper 6 Pusher 10 Connecting passage 20 Fixed guide 31 End fixed guide surface (fixed guide surface) 32a, 32b Side fixed guide surfaces (fixed guide surfaces) 40 Movable guide 42 Groove part 61 End movable guide surface (movable guide surface) 62 Side movable guide surfaces (movable guide surfaces) 100 Insertion jig

Claims

【Claim 1】 An insertion jig that is disposed at an opening of a slot formed in a stator core and guides an end portion of the slot paper to the opening of the slot when the slot paper is inserted into the slot by a pusher, a fixed guide having a communication path for guiding to the slot, a movable guide having a groove portion that forms a part of the communication path and is provided so as to be movable between a closed position close to the fixed guide and an open position spaced apart from the fixed guide, and comprising, inside the communication path, the fixed guide has a tapered fixed guide surface for guiding the slot paper to the slot, and the movable guide has a tapered movable guide surface for guiding the slot paper to the slot, with the end portion of the slot paper inserted into the communication path and guided to the opening of the slot by the fixed guide surface and the movable guide surface with the movable guide disposed at the closed position, and with the slot paper pushed into and accommodated in the slot from the opening by the pusher with the movable guide disposed at the open position. Insertion jig.

Images