Stator manufacturing device

Abstract

To provide a stator manufacturing device capable of performing twisting processing on a segment coil disposed in a stator core with high position accuracy and performing the twisting processing without applying an excessive load to the segment coil.SOLUTION: A stator manufacturing device 10 comprises a processing jig 20, which performs twisting processing on a segment coil 5 disposed in a stator core 1, and is capable of performing the twisting processing on the segment coil 5 by inserting a tip end of the segment coil 5 into a receiving part 30, which is provided in the processing jig 20, and moving the processing jig 20 in a predetermined twisting direction relative to the stator core 1. The receiving part 30 includes a plurality of insertion portions 40, into which the segment coils 5 are inserted, correspondingly to the plurality of segment coils 5. At least a part of the plurality of insertion portions 40 is a movable insertion portion 44 which is relatively movable in a reverse direction with respect to the twisting direction.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a stator manufacturing apparatus.

Background Art

[0002] Conventionally, a stator manufacturing method and an apparatus used therefor, as disclosed in Patent Document 1 below, have been provided. The prior art according to Patent Document 1 inserts segments formed using flat conductors into slots of a stator core, twists the tips of the segments, and manufactures a stator. In the power line processing step, a power line portion, which is a power line for connecting to the outside of the stator among the lead tip portions protruding from the coil ends of the stator core, is bent to the outer peripheral side of the stator. In the first twisting step, a lead tip portion adjacent to the power line portion among the lead tip portions is held by a first twisting ring jig and twisted in the circumferential direction on the power line portion side. In the second twisting step, the connection line portion twisted in the first twisting step and another lead tip portion are held by a second twisting ring jig and twisted in the direction opposite to the first twisting step.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the prior art according to Patent Document 1, after twisting the segment coil in the circumferential direction in the first twisting step, it is necessary to twist it in the direction opposite to the first twisting step in the second twisting step. Therefore, when twisting the segment coil as in the above prior art, there are problems such as twist marks remaining in the segment coil, fluctuations in the coil end position after processing, and excessive load being applied to the coating of the segment coil. Further, in the prior art, due to these problems, there are problems such as poor welding and poor insulation occurring, which affect the quality.

[0005] Therefore, an object of the present invention is to provide a stator manufacturing apparatus capable of twisting a segment coil arranged on a stator core with high positional accuracy and capable of twisting the segment coil without applying an excessive load thereto.

Means for Solving the Problems

[0006] (1) The stator manufacturing apparatus of the present invention includes a processing jig for twisting a segment coil arranged on a stator core. By inserting the tip of the segment coil into a receiving portion provided in the processing jig and relatively moving the processing jig in a predetermined twisting direction with respect to the stator core, the segment coil can be twisted. The receiving portion includes a plurality of insertion portions for inserting the segment coil, corresponding to the plurality of segment coils, and at least a part of the plurality of insertion portions is a movable insertion portion that can relatively move in a direction opposite to the twisting direction.

[0007] The stator manufacturing apparatus of the present invention has a receiving portion provided in a processing jig, which has a plurality of insertion portions for inserting segment coils, and at least a part of the plurality of insertion portions is a movable insertion portion that can move in a direction opposite to the twisting direction. Thus, when the processing jig is relatively moved in a predetermined twisting direction with respect to the stator core in a state where the segment coil is inserted into the insertion portion, for the segment coil inserted into the movable insertion portion, it is possible to delay the twisting process in the twisting direction within the range where the movable insertion portion can move in the opposite direction. Therefore, the stator manufacturing apparatus of the present invention can twist the segment coil by a desired amount of twist without twisting it back in the opposite direction after once twisting the segment coil in the twisting direction. Accordingly, the stator manufacturing apparatus of the present invention can twist the segment coil arranged on the stator core with high positional accuracy and can perform the twisting process without applying an excessive load to the segment coil.

[0008] In addition, since the stator manufacturing apparatus of the present invention does not need to perform a process of once twisting the segment coil in the twisting direction and then twisting it back in the opposite direction as in the prior art, it becomes possible to reliably receive the coil end of the segment coil at the receiving portion of the processing jig. Thereby, the stator manufacturing apparatus of the present invention can improve the processing accuracy of the twisting process compared with the prior art. Also, when performing a process of once twisting the segment coil in the twisting direction and then twisting it back in the opposite direction as in the prior art, it is necessary to ensure a longer length of the segment coil in order to reliably hold the coil end. However, since the stator manufacturing apparatus of the present invention does not require the above-mentioned process of twisting back, the length of the segment coil can be made shorter compared with the case of processing in the prior art manner.

[0009] (2) It is preferable that the movable insertion portion of the stator manufacturing apparatus of the present invention includes an insertion portion structure body arranged inside a notch provided in the receiving portion, and the segment coil can be inserted into the insertion portion structure body.

[0010] By configuring the stator manufacturing apparatus of the present invention as described in (2) above, by inserting the segment coil into the insertion part structure arranged inside the notch provided in the receiving part, it is possible to hold the segment coil inserted into the insertion part structure independently of the movement of the receiving part in the twisting direction. As a result, the stator manufacturing apparatus of the present invention can be configured such that the movable insertion part can move relative to the twisting direction in the reverse direction.

[0011] (3) In the stator manufacturing apparatus of the present invention, it is preferable that the notch forms a movable region of the movable insertion part with respect to the stator core in the relative movement direction of the receiving part, and the insertion part structure can move relative to the notch in the twisting direction and the reverse direction.

[0012] By configuring the stator manufacturing apparatus of the present invention as described in (3) above, within the range of the movable region defined by the notch provided in the receiving part, the movable insertion part can be made movable in the twisting direction and the reverse direction. Therefore, by configuring the stator manufacturing apparatus of the present invention as described in (3) above, by adjusting the size of the notch, the amount of twist of the segment coil inserted into the movable insertion part can be accurately adjusted.

[0013] (4) It is preferable that the stator manufacturing apparatus of the present invention includes a return mechanism that returns the insertion part structure that has moved in the reverse direction from the original position inside the notch to the original position.

[0014] By configuring the stator manufacturing apparatus of the present invention as described in (4) above, after the twisting process of the segment coil is completed, by detaching the segment coil from the insertion part structure, the insertion part structure can be returned to the original position by the return mechanism. Therefore, by configuring the stator manufacturing apparatus of the present invention as described in (4) above, the operation for returning the movable insertion part to the original position during the twisting process of the segment coil can be omitted, and labor saving can be achieved.

[0015] (5) The stator manufacturing apparatus of the present invention is such that the stator core includes a plurality of slots into which the segment coils are inserted, each at a predetermined slot interval in the twisting direction, and the movable insertion portion is movable by a predetermined number of slot intervals in the reverse direction with respect to the original position located before the twisting process.

[0016] By configuring the stator manufacturing apparatus of the present invention as in (5) above, the amount of twist of the segment coil inserted into the movable insertion portion can be made less than that of the segment coil inserted into the other insertion portion by a predetermined number of slot intervals. Therefore, by configuring the stator manufacturing apparatus of the present invention as in (5) above, the amount of twist of the segment coil inserted into the movable insertion portion can be accurately adjusted with the size of the slot interval as the unit amount.

Advantages of the Invention

[0017] According to the present invention, it is possible to provide a stator manufacturing apparatus that solves the above-described problems.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0019] Hereinafter, the stator manufacturing apparatus 10 according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, first, the configuration of the stator manufacturing apparatus 10 will be described, and then the operation of the stator manufacturing apparatus 10 will be described. Note that each drawing is schematically shown for easy understanding, and it should be noted that the actual shape, size, and arrangement of the components may be different. Also, note that hatching may be omitted in the cross-section of each drawing.

[0020] ≪Configuration of Stator Manufacturing Apparatus 10≫ The stator manufacturing apparatus 10 is for twisting the coil end portions 7 of a plurality of segment coils 5 arranged in the slots 3 provided in the stator core 1 as shown in FIGS. 1 and 2. The stator core 1 is formed by laminating a plurality of annular electromagnetic steel sheets. The slot 3 is a through-hole formed so as to penetrate in the lamination direction (the vertical direction in the illustrated example) of the electromagnetic steel sheets forming the stator core 1, and a plurality of slots 3 are provided in the circumferential direction of the stator core 1. The slot 3 is formed so as to extend in the radial direction of the stator core 1. The slot 3 is capable of accommodating a segment coil group composed of a plurality of (six in this embodiment) segment coils 5 arranged side by side in the radial direction of the stator core 1.

[0021] The segment coil 5 is formed by coating a conductive conductor 5x with a film 5y having insulating properties. In this embodiment, the segment coil 5 is formed by coating a conductor 5x made of a copper wire with a film 5y made of enamel. The segment coil 5 is inserted in the lamination direction (vertical direction) of the electromagnetic steel sheets forming the stator core 1, and its end portion (the upper end portion in the illustrated example) is exposed from the stator core 1, and the exposed portion is the coil end portion 7.

[0022] Here, some of the plurality of segment coils 5 described above are for connecting the power input terminals (power lines) to the stator (hereinafter also referred to as "power line coil 5a"), and for passing current to the segment coils 5 provided in the slots adjacent in the circumferential direction (hereinafter also referred to as "crossing line coil 5b"). The power line coil 5a is bent by a separately provided bending device (not shown) so that the coil end portion 7 bends in a first direction toward the radially outer side of the stator core 1 while bending in a second direction (upward in the illustrated example) which is the lamination direction of the stator core 1.

[0023] Also, among the plurality of segment coils 5, the remaining segment coils 5 excluding the power line coil 5a are twisted in the circumferential direction of the stator core 1. Among the segment coils 5 twisted in the circumferential direction of the stator core 1, those forming the general line (hereinafter also referred to as "general line coil 5c") are twisted by three slots in the circumferential direction, while the crossing line coil 5b is twisted by two slots in the circumferential direction.

[0024] The stator manufacturing apparatus 10 is configured to be able to twist the crossing line coil 5b and the general line coil 5c with different amounts of twist in the circumferential direction at once. As shown in FIG. 1, FIG. 3, etc., the stator manufacturing apparatus 10 includes a processing jig 20 and a driving device (not shown) for operating the processing jig 20. The processing jig 20 includes a receiving portion 30. The stator manufacturing apparatus 10 can twist the crossing line coil 5b and the general line coil 5c by rotating the processing jig 20 by the driving device in a state where a plurality of segment coils 5 forming the crossing line coil 5b and the general line coil 5c are set with respect to the receiving portion 30 forming the processing jig 20.

[0025] As shown in Fig. 1 and the like, the receiving portion 30 is an annular member and is arranged at a position adjacent to the stator core 1 in the direction in which the coil end portion 7 of the segment coil 5 protrudes (upward in the illustrated example). As shown in Fig. 1, a plurality of receiving portions 30 are provided so as to be arranged in the radial direction. Specifically, the receiving portions 30 are provided in a number corresponding to the number of the plurality of segment coils 5 accommodated side by side in the radial direction of the stator core 1 in the slot 3, and are arranged in the radial direction according to the radial arrangement of the segment coils 5. In the present embodiment, six segment coils 5 are accommodated in the slot 3. Therefore, in the processing jig 20 of the present embodiment, six receiving portions 30 having different diameters are arranged so as to be arranged in the radial direction according to the arrangement of the segment coils 5 in the slot 3.

[0026] Also, as shown in Figs. 1 to 3 and the like, the receiving portion 30 is formed in a comb-like shape in which the peripheral surface 34 of the receiving portion main body 32 formed in an annular shape has a gap opened toward the receiving side of the segment coil 5. Thereby, the receiving portion 30 is provided with an insertion portion 40 opened toward one end side (lower end in the illustrated example) and a notch portion 50. A plurality of insertion portions 40 are provided in the circumferential direction corresponding to the lead wire coil 5b and the general wire coil 5c.

[0027] The insertion portion 40 is a portion into which the segment coil 5 to be subjected to the twisting process is inserted. In the present embodiment, since the lead wire coil 5b and the general wire coil 5c are the objects of the twisting process, the insertion portion 40 is provided as a portion into which the lead wire coil 5b and the general wire coil 5c are inserted. A plurality of insertion portions 40 are individually insertable for the plurality of segment coils 5 (lead wire coil 5b, general wire coil 5c). The insertion portion 40 is configured to be able to insert at least a part (the tip side of the coil end portion 7) of the segment coil 5. The insertion portion 40 is formed so as to extend in the axial direction (vertical direction in the illustrated example) of the receiving portion 30. Therefore, the insertion portion 40 is configured to be able to insert and remove the coil end portion 7 of the segment coil 5 extending linearly along the axial direction of the receiving portion 30. As shown in Figs. 3 to 7, the insertion portion 40 has a fixed insertion portion 42 and a movable insertion portion 44.

[0028] The fixed insertion part 42 is an insertion part 40 provided corresponding to the general wire coil 5c. The fixed insertion part 42 is formed on the circumferential surface 34 of the receiving part main body 32 so that its position does not fluctuate in the circumferential direction. The fixed insertion part 42 can be constituted by a member separate from the receiving part main body 32 of the receiving part 30, but in this embodiment, it is integrally formed with the receiving part main body 32.

[0029] The movable insertion part 44 is an insertion part 40 provided corresponding to the lead wire coil 5b. The movable insertion part 44 is configured to be relatively movable in the circumferential direction with respect to the receiving part main body 32 on the circumferential surface 34 of the receiving part main body 32. The movable insertion part 44 is movable by a predetermined number of slot intervals (the interval between the circumferentially adjacent slots 3, 3) in the reverse direction with reference to the original position P where it is located before rotating the receiving part 30 in the direction around the axis for twisting. The movable insertion part 44 includes an insertion part constituent body 46 and a return mechanism 48.

[0030] The insertion part constituent body 46 is disposed inside a notch 50 provided in the receiving part main body 32. Here, in this embodiment, the notch 50 is provided at a position corresponding to the lead wire coil 5b in the receiving part main body 32. Further, the notch 50 is formed to extend in the circumferential direction of the receiving part main body 32. The insertion part constituent body 46 is shorter than the notch 50 in the circumferential direction of the receiving part main body 32. Therefore, the insertion part constituent body 46 is relatively movable with respect to the receiving part main body 32 toward one side and the other side in the circumferential direction of the receiving part 30 (the twisting direction and the reverse direction of the lead wire coil 5b) in the notch 50.

[0031] In this embodiment, the notch 50 is formed so as to secure a region in which the notch 50 can move by an amount corresponding to the difference in the amount of twist between the lead wire coil 5b and the general wire coil 5c on the side opposite to the twisting direction with respect to the insertion part structure 46 arranged at the original position P. In this embodiment, the lead wire coil 5b is twisted by two slot intervals, while the general wire coil 5c is twisted by three slot intervals. Therefore, there is a difference in the amount of twist by one slot interval. Thus, in this embodiment, in a state where the insertion part structure 46 is arranged at the original position P, the sizes of the insertion part structure 46 and the notch 50 are set so as to secure a region in which the insertion part structure 46 can move relative to the receiving part main body 32 by one slot interval in the direction opposite to the twisting direction. Further, the insertion part structure 46 and the notch 50 are set in size so that the insertion part structure 46 does not move excessively in the direction opposite to the twisting direction beyond the difference in the amount of twist.

[0032] As shown in the illustrated example, the insertion part structure 46 is provided so as to form a movable insertion part 44 that is released in the same direction as the movable insertion part 44 in a side view, such as in a "C" shape. Thereby, the insertion part structure 46, like the movable insertion part 44, is configured to be able to insert the segment coil 5 (lead wire coil 5b) axially from one end side (the lower end side in the illustrated example) of the receiving part 30 in the axial direction. The insertion part structure 46 is provided such that the movable insertion part 44 extends toward the insertion side of the segment coil 5 more than the other insertion part 40 (fixed insertion part 42).

[0033] The return mechanism 48 is a mechanism having a function of returning the insertion part structure 46 that has moved in the reverse direction from the original position P inside the notch 50 to the original position P. The return mechanism 48 may be any mechanism that exhibits such a function. For example, as shown in the illustrated example, the return mechanism 48 may be configured such that a biasing member such as a spring is arranged between the surface 46a on the side opposite to the twisting direction among the surfaces constituting the insertion part structure 46 and the surface 50a on the side opposite to the twisting direction in the notch 50, so as to apply a biasing force in the twisting direction to the insertion part structure 46. Also, it is preferable that the end portion on the twisting direction side in the notch 50 be set as the original position P of the insertion part structure 46.

[0034] With the above-described configuration, in a state of waiting for twisting processing, the insertion part structure 46 biased by the biasing member forming the return mechanism 48 can be surely positioned at the original position P. Further, with the above-described configuration, after the surfaces 46a and 50a come into contact by rotating the receiving part main body 32 along with the twisting processing, by further rotating the receiving part main body 32 in the twisting direction, the insertion part structure 46 can be moved in the twisting direction together with the receiving part main body 32, and the lead wire coil 5b inserted into the insertion part structure 46 can be subjected to twisting processing. Further, after the twisting processing is finished, by removing the lead wire coil 5b from the movable insertion part 44 of the insertion part structure 46, the insertion part structure 46 can be returned to the original position P by the biasing force of the biasing member forming the return mechanism 48.

[0035] ≪Operation of the stator manufacturing apparatus 10≫ Subsequently, the operation of the above-described stator manufacturing apparatus 10 will be described. When twisting the segment coil 5 by the stator manufacturing apparatus 10, first, with respect to the stator core 1 in which the segment coil 5 is set in each slot 3, the processing jig 20 is arranged at a position deviated in the protruding direction of the coil end portion 7. The processing jig 20 is arranged such that the insertion part 40 of the receiving part 30 faces the coil end portion 7. Further, the processing jig 20 is arranged in a state where the circumferential position is adjusted so that the coil end portion 7 of the lead wire coil 5b faces the movable insertion part 44 and the coil end portion 7 of the general wire coil 5c faces the fixed insertion part 42. In such a state, the receiving part 30 is relatively moved with respect to the stator core 1 in the protruding direction of the coil end portion 7 (the vertical direction in the illustrated example). As a result, as shown in FIG. 5, the coil end portion 7 of the lead wire coil 5b is inserted into the movable insertion part 44 and the coil end portion 7 of the general wire coil 5c is inserted into the fixed insertion part 42. Thereby, the process of setting the plurality of segment coils 5 in the processing jig 20 (coil setting process) is completed.

[0036] When the coil set process is completed as described above, a drive device (not shown) is operated, and a process (twisting process) is executed in which the receiving part main body 32 is rotated by three slot intervals in the twisting direction (right direction in the illustrated example) around the axial center position of the receiving part main body 32 of the processing jig 20. As a result, the coil end portion 7 of the general wire coil 5c inserted into the fixed insertion portion 42 is twisted by three slot intervals in the circumferential direction of the stator core 1. Further, the coil end portion 7 of the lead wire coil 5b inserted into the movable insertion portion 44 is twisted by two slot intervals in the circumferential direction of the stator core 1.

[0037] To explain in more detail, as shown in FIG. 6, after the start of the twisting process, until the receiving part main body 32 rotates in the twisting direction by one slot interval, even if the receiving part main body 32 rotates in the twisting direction, the insertion part structure body 46 forming the movable insertion part 44 stops without moving in the twisting direction at the notch 50 and maintains the stopped state. On the other hand, even while the insertion part structure body 46 is stopped, the receiving part main body 32 moves in the twisting direction. Therefore, while the insertion part structure body 46 is stopped inside the notch 50, the relative position of the insertion part structure body 46 with respect to the notch 50 changes in the direction opposite to the twisting direction. When the receiving part main body 32 moves in the twisting direction by one slot interval, the insertion part structure body 46 comes into contact with the notch 50 on the surface 46a on the side opposite to the twisting direction. When the receiving part main body 32 further rotates in the twisting direction after reaching the state shown in FIG. 6, the insertion part structure body 46 is pushed and moved in the twisting direction by the receiving part main body 32. As a result, the coil end portion 7 of the lead wire coil 5b inserted into the movable insertion part 44 provided in the insertion part structure body 46 is twisted by two slot intervals in the circumferential direction of the stator core 1.

[0038] When the twisting process is executed as described above, as shown in FIG. 7, the general wire coil 5c is twisted by three slot intervals, while the lead wire coil 5b is twisted by two slot intervals. When the twisting process is completed in this way, the state shown in FIG. 1 is obtained. When this state is reached, the process of detaching the processing jig 20 from the stator core 1 (detachment process) is executed. Specifically, in the detachment process, the processing jig 20 is moved in the axial direction of the coil end portion 7 (upward in the illustrated example), and the processing jig 20 is detached from the stator core 1. When the processing jig 20 is detached in the detachment process, the insertion portion assembly 46 returns to the original position P inside the notch 50 by the biasing force of the biasing member forming the return mechanism 48. Further, when the processing jig 20 is detached from the stator core 1 in the detachment process, the lead wire coil 5b and the general wire coil 5c are in a twisted state as shown in FIG. 2. Thereby, the twisting process of the segment coil 5 by the stator manufacturing apparatus 10 is completed.

[0039] ≪Function and Effect≫ The stator manufacturing apparatus 10 according to the above-described embodiment has the following characteristic configurations shown in (a) to (e), and thereby the effects peculiar to the present invention can be obtained.

[0040] (a) The stator manufacturing apparatus 10 of the present embodiment includes a processing jig 20 for twisting the segment coil 5 disposed on the stator core 1. By inserting the tip portion of the segment coil 5 into the receiving portion 30 provided on the processing jig 20 and relatively moving the processing jig 20 in a predetermined twisting direction with respect to the stator core 1, the segment coil 5 can be twisted. The receiving portion 30 includes a plurality of insertion portions 40 for inserting the segment coil 5 corresponding to a plurality of segment coils 5, and at least a part of the plurality of insertion portions 40 is a movable insertion portion 44 that can relatively move in a direction opposite to the twisting direction.

[0041] The stator manufacturing apparatus 10 is configured such that a receiving portion 30 provided in a processing jig 20 has a plurality of insertion portions 40 for inserting the segment coil 5, and at least a part of the plurality of insertion portions 40 is a movable insertion portion 44 that can move in a direction opposite to the twisting direction. Thereby, when the processing jig 20 is relatively moved in a predetermined twisting direction with respect to the stator core 1 in a state where the segment coil 5 is inserted into the insertion portion 40, for the segment coil 5 inserted into the movable insertion portion 44, it is possible to delay the twisting process in the twisting direction within the range where the movable insertion portion 44 can move relatively in the reverse direction. Therefore, the stator manufacturing apparatus 10 can twist the segment coil 5 in the twisting direction by a desired amount of twist without twisting it back in the reverse direction after once twisting it in the twisting direction. Accordingly, the stator manufacturing apparatus 10 can twist the segment coil 5 disposed on the stator core 1 with high positional accuracy and can perform the twisting process without applying an excessive load to the segment coil 5.

[0042] Further, the above-described stator manufacturing apparatus 10 does not need to perform a process of once twisting the segment coil 5 in the twisting direction and then twisting it back in the reverse direction as in the prior art, so that the coil end portion 7 of the segment coil 5 can be reliably received in the receiving portion 30 of the processing jig 20. Thereby, the stator manufacturing apparatus 10 can improve the processing accuracy of the twisting process as compared with the prior art. In addition, since the stator manufacturing apparatus 10 does not require the above-described process of twisting back, the length of the segment coil 5 can be shortened as compared with the case of processing in the same manner as in the prior art.

[0043] (b) The stator manufacturing apparatus 10 of the present embodiment includes an insertion portion structure body 46 disposed inside a notch portion 50 provided in the receiving portion 30 in the movable insertion portion 44, and the segment coil 5 can be inserted into the insertion portion structure body 46.

[0044] By configuring the stator manufacturing apparatus 10 as described in (b) above, the segment coil 5 can be inserted into the insertion part structure 46 arranged inside the notch part 50 provided in the receiving part 30, and the segment coil 5 inserted into the insertion part structure 46 can be held independently of the movement of the receiving part 30 in the twisting direction. As a result, the stator manufacturing apparatus 10 can be configured such that the movable insertion part 44 can move relative to the twisting direction in the opposite direction.

[0045] (c) In the stator manufacturing apparatus 10 of the present embodiment, the notch part 50 forms the movable region of the movable insertion part 44 with respect to the stator core 1 in the relative movement direction of the receiving part 30, and the insertion part structure 46 can move relative to the notch part 50 in the twisting direction and the reverse direction.

[0046] By configuring the stator manufacturing apparatus 10 as described in (c) above, the movable insertion part 44 can move relative to the twisting direction and the reverse direction within the range of the movable region defined by the notch part 50 provided in the receiving part 30. Therefore, by configuring the stator manufacturing apparatus 10 as described in (c) above, the amount of twist of the segment coil 5 inserted into the movable insertion part 44 can be accurately adjusted by adjusting the size of the notch part 50.

[0047] (d) The stator manufacturing apparatus 10 of the present embodiment includes a return mechanism 48 that returns the insertion part structure 46 that has moved in the reverse direction from the original position P inside the notch part 50 to the original position P.

[0048] By configuring the stator manufacturing apparatus 10 as described in (d) above, after the twisting process of the segment coil 5 is completed, the segment coil 5 can be detached from the insertion part structure 46, and the insertion part structure 46 can be returned to the original position P by the return mechanism 48. Therefore, by configuring the stator manufacturing apparatus 10 as described in (d) above, the operation for returning the movable insertion part 44 to the original position P during the twisting process of the segment coil 5 can be omitted, and labor saving can be achieved.

[0049] (e) The stator manufacturing apparatus 10 of the present embodiment includes a plurality of slots 3 into which the segment coils 5 are inserted in a twisting direction at a predetermined slot interval for each stator core 1, and the movable insertion portion 44 is movable in the reverse direction by a predetermined number of slot intervals based on the original position P located before the twisting process.

[0050] By configuring the stator manufacturing apparatus 10 as in (e) above, the amount of twist of the segment coil 5 inserted into the movable insertion portion 44 can be made less than the amount of twist of the segment coil 5 inserted into the other insertion portion 40 by a predetermined number of slot intervals. Therefore, by configuring the stator manufacturing apparatus 10 as in (e) above, the amount of twist of the segment coil 5 inserted into the movable insertion portion 44 can be accurately adjusted with the size of the slot interval as a unit amount.

[0051] (f) In the stator manufacturing apparatus 10 of the present embodiment, the movable insertion portion 44 extends toward the segment coil 5 more than the other insertion portions 40.

[0052] By configuring the stator manufacturing apparatus 10 as in (f) above, even if the coil end portion 7 protruding from the stator core 1 in the segment coil 5 is shortened, it is possible to suppress the coil end portion 7 of the segment coil 5 inserted into the movable insertion portion 44 from detaching from the movable insertion portion 44. Therefore, the stator manufacturing apparatus 10 can suppress the protruding amount of the segment coil 5 outward from the stator core 1.

[0053] ≪Modification Example≫ The above-described stator manufacturing apparatus 10 merely shows one embodiment of the present invention, and various modifications, omissions, additions, etc. can be made as appropriate without departing from the spirit of the present invention. That is, as described in (a) above, the stator manufacturing apparatus 10 may be provided with a receiving portion 30 having an insertion portion 40 for inserting the segment coil 5, and at least a part of the plurality of insertion portions 40 may be a movable insertion portion 44 that can move relative to the twisting direction in the reverse direction. It is not necessary to be provided with the fixed insertion portion 42 as in the above embodiment. For example, in the stator manufacturing apparatus 10 described above, for some or all of the insertion portions 40 that are the fixed insertion portions 42 for inserting the general wire coil 5c, while being made movable in the reverse direction with respect to the twisting direction, for the insertion portion 40 for the general wire coil 5c that is made movable, it is also possible to make the relative movement amount in the reverse direction with respect to the twisting direction smaller than that of the movable insertion portion 44 for the lead wire coil 5b.

[0054] The above-described stator manufacturing apparatus 10 is provided with an insertion portion structure body 46 disposed inside the notch portion 50 for the movable insertion portion 44 as described in (b) above, but the present invention is not limited thereto. The stator manufacturing apparatus 10 may be configured such that the movable insertion portion 44 that can move relative to the twisting direction in the reverse direction is formed by a configuration other than the insertion portion structure body 46 without providing the insertion portion structure body 46.

[0055] The above-described stator manufacturing apparatus 10 shows an example in which the notch portion 50 is provided so as to form a movable region of the movable insertion portion 44 with respect to the stator core 1 in the relative movement direction of the receiving portion 30 as described in (c) above, but the present invention is not limited thereto. For example, the stator manufacturing apparatus 10 may be configured to define the movable region of the movable insertion portion 44 by other slits or the like instead of providing the notch portion 50.

[0056] The above-described stator manufacturing apparatus 10 includes a return mechanism 48 that returns the insertion unit assembly 46 to the original position P as described in (d) above, but the present invention is not limited to this. For example, the stator manufacturing apparatus 10 may not include the return mechanism 48, and may use a separately provided device or instrument, or may manually return the insertion unit assembly 46 to the original position P.

[0057] As described in (e) above, the above-described stator manufacturing apparatus 10 shows an example in which the movable insertion portion 44 can move in the reverse direction by a predetermined number (three in the above embodiment) of slot intervals with the original position P as a reference, with the interval (slot interval) between the slots 3, 3 provided adjacent to each other in the circumferential direction in the stator core 1 as a reference length. However, the present invention is not limited to this. For example, the stator manufacturing apparatus 10 may be configured such that the movable amount of the movable insertion portion 44 in the direction opposite to the twisting direction is set to an amount other than an amount exceeding a reference other than the slot interval.

[0058] As described in (f) above, the movable insertion portion 44 of the above-described stator manufacturing apparatus 10 extends toward the segment coil 5 more than the other insertion portion 40 (fixed insertion portion 42), but the present invention is not limited to this. The stator manufacturing apparatus 10 may be configured such that the extension amount of the movable insertion portion 44 is equal to the extension amount of the fixed insertion portion 42, or is smaller than the extension amount of the fixed insertion portion 42.

[0059] The present invention of the application is not limited to the configurations described in the above-described embodiments and the like, and can be appropriately designed and changed without departing from the scope of the technical idea of the present invention of the application. The constituent elements of the above-described embodiments and modification examples may be arbitrarily selected and combined. Further, any constituent element of each of the above-described embodiments and modification examples may be arbitrarily combined with any constituent element described in the means for solving the problems, the form for implementing the invention, etc., or any constituent element described in the means for solving the problems, the form for implementing the invention, etc., or a constituent element embodying any of the above-described constituent elements. Regarding these, the applicant also has the intention to obtain rights in the present application or a divisional application or a change application based on the present application.

Industrial Applicability

[0060] The present invention can be suitably used in general stator manufacturing apparatuses that perform twisting of segment coils.

Description of Signs

[0061] 1: Stator core 3: Slot 5: Segment coil 7: Coil end part 10: Stator manufacturing apparatus 20: Processing jig 30: Receiving part 40: Insertion part 44: Movable insertion part 46: Insertion part structure 48: Return mechanism 50: Notch P: Home position

Claims

1. A stator manufacturing apparatus including a processing jig for twisting a segment coil disposed in a stator core, wherein the segment coil can be twisted by inserting a tip end portion of the segment coil into a receiving portion provided in the processing jig and relatively moving the processing jig in a predetermined twisting direction with respect to the stator core, the receiving portion includes a plurality of insertion portions for inserting the segment coil, corresponding to the plurality of segment coils, and at least a part of the plurality of insertion portions is a movable insertion portion that can relatively move in a direction opposite to the twisting direction, characterized by the stator manufacturing apparatus.

2. The movable insertion portion includes an insertion portion structure body disposed inside a notch provided in the receiving portion, and the segment coil can be inserted into the insertion portion structure body, characterized by the stator manufacturing apparatus according to claim 1.

3. The notch forms a movable region of the movable insertion portion with respect to the stator core in a relative movement direction of the receiving portion, and the insertion portion structure body can relatively move in the twisting direction and the opposite direction in the notch, characterized by the stator manufacturing apparatus according to claim 2.

4. The movable insertion portion includes a return mechanism for returning the insertion portion structure body that has moved in the opposite direction from an original position inside the notch to the original position, characterized by the stator manufacturing apparatus according to claim 2 or 3.

5. The stator core includes a plurality of slots into which the segment coil is inserted at predetermined slot intervals in the twisting direction, and the movable insertion portion can move by a predetermined number of slot intervals in the opposite direction with reference to an original position before twisting, characterized by the stator manufacturing apparatus according to claim 1 or 2.

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