Stator of rotary electric machine

Abstract

To provide a stator of a rotary electric machine which can be assembled with high productivity.SOLUTION: The inner side (X2 portion) of the coil (4) in the radial direction (X) in the slot (5) has a length (W1) in the circumferential direction (Y) smaller than a length (W2) in the circumferential direction (Y) of the opening portion (51) on the inner side (X2 portion) of the slot (5) in the radial direction (X). A wedge (41) that extends from one end side to the other end side in an axial direction (Z), and a pressing tool (71) that is inserted into grooves (61) respectively formed on facing side surfaces (31) of tooth portions (3) adjacent to each other in a circumferential direction (Y) so as to straddle an opening (51) of a slot (5) in the circumferential direction (Y), is installed on an inner side (X2) of the wedge (41) in a radial direction (X) in the slot (5), and presses a coil (4) to an outer side (X1) in the radial direction (X) via the wedge (41) are provided.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to a stator for a rotating electric machine. [Background technology]

[0002] Conventionally, a coil insertion device has been proposed that automatically inserts coils into slots in stators used in rotating electrical machines such as motors (see, for example, Patent Document 1). When producing a small number of motors without using an automatic insertion device, an operator visually checks the insertion grooves for inserting wedges that are formed in slots where coils are already wound. The operator then holds the wedge, positions it in the insertion groove, and inserts it into the insertion groove by pushing it from one end in the axial direction. In other words, wedge insertion is done manually. Therefore, wedge insertion requires time and effort, resulting in poor productivity.

[0003] Furthermore, when inserting a wedge into a slot with densely wound wire, there is a limit to how far it can be inserted manually, and the wedge may not be inserted all the way to the other end in the axial direction. To solve this problem, the proportion of the coil in the slot is reduced, specifically, the number of coil windings that can be inserted into the slot is reduced, but this does not improve motor performance. Furthermore, because inserting such a wedge requires skill, the number of workers who can do it is limited, and productivity does not increase.

[0004] Therefore, it has been desired to be able to insert wedges easily, without damaging the wedges, and with the same quality even when winding is performed at high density, regardless of the worker. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-211592 Summary of the Invention [Problem to be solved by the invention]

[0006] Conventional wedges are made of thin materials such as paper or resin film, and in slots where coils are already installed, the gap between the coil and the tooth into which the wedge should be inserted is very narrow. Furthermore, because the coil may bulge or warp, the worker must press down on the coil while simultaneously inserting the wedge in the axial direction, which requires skill. For these reasons, when an unskilled worker inserts the wedge, the wedge may buckle midway through insertion and not reach the other axial end of the core. Furthermore, the wedge may get caught between the stator core and the coil, damaging the edge of the stator core.

[0007] To place the wedge in the desired position with high productivity, the coil must be inserted accurately into the slot in the previous step. However, this requires the use of a dedicated jig, which takes time to change over and reduces productivity.

[0008] The present disclosure discloses a technique for solving the above-described problems, and aims to provide a stator for a rotating electric machine that can be assembled with high productivity. [Means for solving the problem]

[0009] The stator of the rotating electric machine of the present disclosure includes: a stator core having an annular yoke portion and a plurality of teeth protruding radially inward from an inner peripheral surface of the yoke portion at intervals in the circumferential direction; a coil housed in a slot formed between the teeth portions adjacent in the circumferential direction, a wedge located radially inside the coil within the slot and having a circumferential width smaller than a circumferential width of an opening portion of the slot on the radial inside, the wedge extending from one end side to the other end side in the axial direction; a presser that is inserted into grooves formed on opposing side surfaces of the circumferentially adjacent teeth so as to straddle the opening of the slot in the circumferential direction, and is installed radially inside the wedge within the slot, and presses the coil radially outward via the wedge. It is something. [Effects of the Invention]

[0010] The stator of the rotating electrical machine according to the present disclosure can be assembled with high productivity. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing the configuration of a stator of a rotating electric machine according to a first embodiment. [Figure 2] 2 is a cross-sectional view of a rotating electric machine using the stator shown in FIG. 1. [Figure 3] 2 is a perspective view showing the configuration of a stator core of the stator shown in FIG. 1. [Figure 4] 4 is a partial plan view showing the configuration of the stator core shown in FIG. 3. [Figure 5] FIG. 4 is a partial perspective view showing the configuration of the stator core shown in FIG. [Figure 6] 2 is a perspective view showing the configuration of a pressing tool for the stator shown in FIG. 1. FIG. [Figure 7] Fig. 7A is a partial cross-sectional view showing a method for manufacturing the stator shown in Fig. 1. Fig. 7B is a partial cross-sectional view showing a method for manufacturing the stator shown in Fig. 1. Fig. 7C is a partial cross-sectional view showing a method for manufacturing the stator shown in Fig. 1. [Figure 8] Fig. 8A is a partial perspective view showing a method for manufacturing the stator shown in Fig. 1. Fig. 8B is a partial perspective view showing a method for manufacturing the stator shown in Fig. 1. [Figure 9] FIG. 10 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to a second embodiment. [Figure 10] FIG. 10 is a perspective view showing the configuration of a stator core of the stator shown in FIG. [Figure 11]FIG. 11 is a partial perspective view showing the configuration of the stator core shown in FIG. [Figure 12] 11 is a partial plan view showing the configuration of the stator core shown in FIG. [Figure 13] FIG. 10 is a perspective view showing the configuration of a pressing tool for the stator shown in FIG. 9. [Figure 14] Fig. 14A is a partial plan view showing a method for manufacturing the stator shown in Fig. 9. Fig. 14B is a partial plan view showing a method for manufacturing the stator shown in Fig. 9. [Figure 15] Fig. 15A is a partial perspective view showing a method for manufacturing the stator shown in Fig. 9. Fig. 15B is a partial perspective view showing a method for manufacturing the stator shown in Fig. 9. [Figure 16] FIG. 11 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to a third embodiment. [Figure 17] 17A and 17B are diagrams showing the configuration of a pressing tool for the stator shown in FIG. 16. [Figure 18] Fig. 18A is a partial plan view showing a method for manufacturing the stator shown in Fig. 16. Fig. 18B is a partial plan view showing a method for manufacturing the stator shown in Fig. 16. [Figure 19] Fig. 19A is a partial perspective view showing a method for manufacturing the stator shown in Fig. 16. Fig. 19B is a partial perspective view showing a method for manufacturing the stator shown in Fig. 16. [Figure 20] FIG. 10 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to a fourth embodiment. [Figure 21] 21 is a diagram showing the configuration of a pressing tool for the stator shown in FIG. 20. FIG. [Figure 22] Fig. 22A is a partial plan view showing a method for manufacturing the stator shown in Fig. 20. Fig. 22B is a partial plan view showing a method for manufacturing the stator shown in Fig. 20. [Figure 23] Fig. 23A is a partial perspective view showing a method for manufacturing the stator shown in Fig. 20. Fig. 23B is a partial perspective view showing a method for manufacturing the stator shown in Fig. 20. [Figure 24] FIG. 11 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to a fifth embodiment. [Figure 25] Fig. 25A is a partial cross-sectional view showing a method for manufacturing the stator shown in Fig. 24. Fig. 25B is a partial cross-sectional view showing a method for manufacturing the stator shown in Fig. 24. [Figure 26] 25 is a partial perspective view showing a method for manufacturing the stator shown in FIG. 24. [Figure 27] FIG. 13 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to a sixth embodiment. [Figure 28] Fig. 28A is a partial plan view showing a method for manufacturing the stator shown in Fig. 27. Fig. 28B is a partial plan view showing a method for manufacturing the stator shown in Fig. 27. [Figure 29] Fig. 29A is a partial perspective view showing a method for manufacturing the stator shown in Fig. 27. Fig. 29B is a partial perspective view showing a method for manufacturing the stator shown in Fig. 27. [Figure 30] FIG. 13 is a partial perspective view showing the configuration of a stator of a rotating electric machine according to a seventh embodiment. [Figure 31] Fig. 31A is a partial plan view showing a method for manufacturing the stator shown in Fig. 30. Fig. 31B is a partial plan view showing a method for manufacturing the stator shown in Fig. 30. [Figure 32] Fig. 32A is a partial perspective view showing a method for manufacturing the stator shown in Fig. 30. Fig. 32B is a partial perspective view showing a method for manufacturing the stator shown in Fig. 30. [Figure 33] FIG. 13 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to an eighth embodiment. [Figure 34] Fig. 34A is a partial plan view showing a method for manufacturing the stator shown in Fig. 33. Fig. 34B is a partial plan view showing a method for manufacturing the stator shown in Fig. 33. [Figure 35] Fig. 35A is a partial perspective view showing a method for manufacturing the stator shown in Fig. 33. Fig. 35B is a partial perspective view showing a method for manufacturing the stator shown in Fig. 33. [Figure 36] FIG. 13 is a partial perspective view showing the configuration of a stator of a rotating electric machine according to a ninth embodiment. [Figure 37] FIG. 37 is a perspective view showing the configuration of a stator core of the stator shown in FIG. [Figure 38] FIG. 38 is a partial perspective view showing the configuration of the stator core shown in FIG. [Figure 39] Fig. 39A is a partial perspective view showing the configuration of a portion of the stator core surrounded by dotted line Q1 shown in Fig. 38. Fig. 39B is a partial enlarged view showing the configuration of a portion of the stator core surrounded by dotted line Q2 shown in Fig. 38. [Figure 40] Fig. 40A is a diagram showing the configuration of the pressing tool of the stator shown in Fig. 36. Fig. 40B is a diagram showing the part of the pressing tool in Fig. 40A surrounded by dotted line Q3. Fig. 40C is a diagram showing the part of the pressing tool in Fig. 40A surrounded by dotted line Q4. [Figure 41] Fig. 41A is a partial plan view showing a method for manufacturing the stator shown in Fig. 36. Fig. 41B is a partial plan view showing a method for manufacturing the stator shown in Fig. 36. [Figure 42] Fig. 42A is a partial cross-sectional view showing a method for manufacturing the stator shown in Fig. 36. Fig. 42B is a partial cross-sectional view showing a method for manufacturing the stator shown in Fig. 36. [Figure 43] Fig. 43A is a partial perspective view showing a method for manufacturing the stator shown in Fig. 36. Fig. 43B is a partial side view showing a method for manufacturing the stator shown in Fig. 36. DETAILED DESCRIPTION OF THE INVENTION

[0012] In the following description, in each embodiment, the stator of a rotating electric machine will be described using the drawings. Unless otherwise specified, the terms "axial direction," "circumferential direction," "radial direction," "radially inner direction," and "radially outer direction" refer to the "axial direction," "circumferential direction," "radial direction," "radially inner direction," and "radially outer direction" of the stator, respectively. Furthermore, unless otherwise specified, the terms "upper" and "lower" refer to a plane perpendicular to the axial direction at a reference location, with the side of the plane that includes the center point of the stator as the boundary being "lower" and the opposite side being "upper." Each direction will be described based on these directions. In the following description, the axial direction Z, circumferential direction Y, radial direction X, outer side X1 of the radial direction X, and inner side X2 of the radial direction X will be assigned respective symbols.

[0013] Embodiment 1 FIG. 1 is a perspective view showing the configuration of a stator of a rotating electric machine according to a first embodiment. FIG. 2 is a schematic cross-sectional view of a rotating electrical machine using the stator shown in FIG. Fig. 3 is a perspective view showing the configuration of the stator core of the stator shown in Fig. 1. In Fig. 3, grooves 61 are shown to illustrate the locations where they are formed. FIG. 4 is a partial plan view showing the configuration of the stator core shown in FIG. FIG. 5 is a partial perspective view showing the configuration of the stator core shown in FIG. FIG. 6 is a perspective view showing the configuration of the stator holder shown in FIG.

[0014] FIG. 7A is a partial cross-sectional view showing a method for manufacturing the stator shown in FIG. FIG. 7B is a partial cross-sectional view showing a method for manufacturing the stator shown in FIG. FIG. 7C is a partial cross-sectional view showing a method for manufacturing the stator shown in FIG. FIG. 8A is a partial perspective view showing a method for manufacturing the stator shown in FIG. FIG. 8B is a partial perspective view showing a method for manufacturing the stator shown in FIG.

[0015] First, the rotating electric machine 100 will be described. As shown in Fig. 2, the rotating electric machine 100 has a stator 10 having a coil 4, and a rotor 20 rotatably arranged on the inner side X2 in the radial direction X of the stator 10 via a gap (air gap). The rotor 20 has a rotor core, and on the outer side X1 in the radial direction X of the rotor core, a permanent magnet is built in in the case of a synchronous machine, or a conductor such as aluminum is built in in the case of an induction machine.

[0016] A rotating shaft 200 is fitted to the inner side X2 of the rotor 20 in the radial direction X, and an outer side X1 of the stator 10 in the radial direction X is fitted to a housing 201. Therefore, the positional relationship between the rotor 20 and the stator 10 is maintained by the housing 201 and the rotating shaft 200, and the rotor 20 and the stator 10 are configured to be coaxial.

[0017] As shown in FIG. 1, the stator 10 is a stator 10 for a rotating electric machine 100 with three phases, two poles, and 48 slots. Note that this is just an example, and the number of phases, poles, and slots is not limited to this. The stator 10 includes a stator core 11 and coils 4. As shown in FIG. 3, the stator core 11 has an annular yoke portion 2 and a plurality of teeth 3 that protrude inward X2 in the radial direction X from the inner peripheral surface of the yoke portion 2 at intervals in the circumferential direction Y. Slots 5 are formed between the teeth 3 adjacent to each other in the circumferential direction Y. As shown in FIG. 1, the coils 4 are housed in the slots 5.

[0018] As shown in FIG. 7C , the coil 4, wedge 41, and retainer 71 are arranged in the slot 5 in this order from the outer side X1 in the radial direction X. The wedge 41 prevents the coil 4 inserted into the slot 5 of the stator core 11 from protruding from the slot 5. The retainer 71 fixes the wedge 41 in the slot 5. As shown in FIGS. 7A and 7B , the wedge 41 has a width W2 in the circumferential direction Y that is smaller than the width W1 in the circumferential direction Y of the opening 51 on the inner side X2 in the radial direction X of the slot 5. Furthermore, as shown in FIG. 8 , the wedge 41 is formed to extend from one end side to the other end side in the axial direction Z. The wedge 41 and retainer 71 are formed of an insulating material such as paper or a resin film.

[0019] 3 and 4, the grooves 61 are formed on the opposing side surfaces 31 of the teeth portions 3 adjacent in the circumferential direction Y, and multiple grooves 61 are formed in the axial direction Z, two in FIG. 3. However, this is not limited thereto, and it is also conceivable that three or more grooves 61 are formed in the axial direction Z. A pressing tool 71 is inserted into each groove 61 (see FIG. 8).

[0020] 7A, the groove 61 has an opening 611 formed on the inner side X2 in the radial direction X of the tooth portion 3. The groove 61 extends from the opening 611 toward the outer side X1 in the radial direction X by a predetermined length H1, and has a step 612 recessed in the circumferential direction Y at its end on the outer side X1 in the radial direction X. The opening 611 of the groove 61 is formed with a length T1 (see FIG. 5) in the axial direction Z.

[0021] 7C , the retainer 71 is inserted into each groove 61 on the opposing side surfaces 31 of the teeth 3 adjacent in the circumferential direction Y so as to straddle the opening 51 of the slot 5 in the circumferential direction Y, and is installed on the inner side X2 in the radial direction X of the wedge 41 within the slot 5. The retainer 71 presses the coil 4 against the outer side X1 in the radial direction X via the wedge 41.

[0022] Specifically, as shown in FIGS. 6 and 7C , the presser 71 includes a plate portion 711 extending in the circumferential direction Y of the opening 51 of the slot 5, and claw portions 712 extending from both ends of the plate portion 711 in the circumferential direction Y to the outer side X1 in the radial direction X, with ends on the outer side X1 in the radial direction X protruding on the side opposite the plate portion 711 in the circumferential direction Y. The presser 71 is formed such that its length T2 in the axial direction Z is long enough to be inserted into the groove 61 of the opening 611, which has a length T1 in the axial direction Z. Furthermore, the length H2 of the claw portions 712 in the radial direction X is shorter than the length H1 of the groove 61 in the radial direction X. As shown in FIG. 7C , the claw portions 712 are inserted into the groove 61 and are engaged with the step portions 612 of the groove 61 in the radial direction X.

[0023] Next, a method for manufacturing the stator of the rotating electric machine of the first embodiment configured as described above will be described. First, continuous coils 4 for distributed winding are inserted and installed in slots 5 of stator core 11 (FIG. 7A). Then, wedges 41 are inserted to prevent the coils 4 inserted into slots 5 of stator core 11 from protruding from within slot 5. At this time, since the width W2 of wedge 41 in the circumferential direction Y is smaller than the width W1 of opening 51 of slot 5 in the circumferential direction Y, wedge 41 is moved from the inner side X2 in the radial direction X of stator core 11 toward the outer side X1 in the radial direction X, as shown by the arrow in FIG. 8A, and wedge 41 is inserted into slot 5 from opening 51 (FIG. 7B).

[0024] Next, as shown by the arrow in Fig. 8B, the retainer 71 is moved from the inside X2 in the radial direction X of the stator core 11 toward the outside X1 in the radial direction X, and the retainer 71 is inserted into the groove 61 of the stator 10 (Fig. 7C). As a result, the retainer 71 presses the coil 4 toward the outside X1 in the radial direction X via the wedge 41. Since the retainer 71 has a claw portion 712, the retainer 71 is engaged with the step portion 612 of the groove 61 in the radial direction X, preventing the retainer 71 from coming off.

[0025] Grooves 61 are formed in several locations in the axial direction Z of slots 5 of stator 10, and retainers 71 are inserted into all of the grooves 61 to prevent wedges 41 from falling off. In this way, the wedges 41 are arranged without having the function of fixing the coils 4 themselves, but are fixed by the retainers 71. This ensures that the wedges 41 prevent the coils 4 from protruding from within the slots 5. Then, wedges 41 and retainers 71 are installed in all of the slots 5, and the stator 10 of the rotating electric machine 100 is manufactured as shown in FIG. 1.

[0026] Because the stator 10 of the rotating electric machine 100 is assembled in this manner, the load and time required for inserting the wedge 41 and the retainer 71 can be reduced compared to the conventional method of inserting the wedge from one axial end to the other. Furthermore, friction between the wedge 41 and the coil 4 is reduced when inserting the wedge 41, reducing damage to the coil 4. Furthermore, because friction is reduced when inserting the wedge 41, the wedge 41 can be inserted with less force, allowing anyone to insert the wedge 41 with the same quality. Naturally, because the retainer 71 is simply inserted into the groove 61, anyone can insert the retainer 71 with the same quality.

[0027] Furthermore, the groove extending in the axial direction of the stator, which was conventionally required for inserting a wedge, is no longer necessary. Furthermore, since the direction in which the coil 4 is pressed down (outside X1 in the radial direction X) and the attachment direction of the presser 71 (outside X1 in the radial direction X) are the same, whereas in the conventional method of inserting a wedge while pressing down the coil required both hands, the work can now be done with one hand, which is expected to reduce the amount of work and damage to the coil 4.

[0028] According to the stator of the rotating electric machine of the first embodiment configured as described above, a stator core having an annular yoke portion and a plurality of teeth protruding radially inward from an inner peripheral surface of the yoke portion at intervals in the circumferential direction; a coil housed in a slot formed between the teeth portions adjacent in the circumferential direction, a wedge located radially inside the coil within the slot and having a circumferential width smaller than a circumferential width of an opening portion of the slot on the radial inside, the wedge extending from one end side to the other end side in the axial direction; a presser that is inserted into grooves formed on opposing side surfaces of the circumferentially adjacent teeth so as to straddle the opening of the slot in the circumferential direction, and is installed radially inside the wedge within the slot, and presses the coil radially outward via the wedge. So, This prevents the coil and the wedge from rubbing against each other, improves workability, and enables the stator of the rotating electrical machine to be assembled with high productivity.

[0029] Furthermore, according to the stator of the rotating electric machine of the first embodiment configured as described above, A plurality of the grooves are formed in the axial direction, and a plurality of the pressing tools are installed therein. the groove is formed so as to open to the inside in the radial direction of the tooth portion and extend radially outward by a predetermined length, and the radially outer end portion has a step portion recessed in the circumferential direction, The pressing tool includes a plate portion extending in a circumferential direction of the opening of the slot, and claw portions extending radially outward from both circumferential ends of the plate portion, with the radially outer ends protruding toward the side opposite the plate portion in the circumferential direction, The claw portion is inserted into the groove and engaged with the step portion of the groove in the radial direction. So, Since the claws of the presser are engaged with the stepped portions of the grooves, the presser is reliably prevented from falling off, and the presser can reliably press the coil via the wedge.

[0030] Embodiment 2 FIG. 9 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to the second embodiment. Fig. 10 is a perspective view showing the configuration of the stator core of the stator shown in Fig. 9. Note that Fig. 10 shows only the locations where the grooves 62 are formed. FIG. 11 is a partial perspective view showing the configuration of the stator core shown in FIG. FIG. 12 is a partial plan view showing the configuration of the stator core shown in FIG. FIG. 13 is a perspective view showing the configuration of the stator holder shown in FIG.

[0031] FIG. 14A is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 14B is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 15A is a partial perspective view showing a method for manufacturing the stator shown in FIG. FIG. 15B is a partial perspective view showing a method for manufacturing the stator shown in FIG. In each figure, the same parts as those in the first embodiment are given the same reference numerals.

[0032] In the present embodiment 2, the description will be focused on the differences and the description of the same parts as in the above embodiment 1 will be omitted as appropriate. In the above embodiment 1, an example was shown in which a groove 61 and a presser 71 having a claw portion 712 inserted into the groove 61 were provided, but in the present embodiment 2, an example of another groove 62 and presser 72 will be described.

[0033] 11 and 12, the grooves 62 are formed on the opposing side surfaces 31 of the teeth 3 adjacent to each other in the circumferential direction Y, and extend from one end to the other end in the axial direction Z. As shown in FIG. 14B, the retainer 72 is inserted into the groove 62 so as to straddle the opening 51 of the slot 5 in the circumferential direction Y, and is installed in the slot 5 on the inner side X2 of the wedge 41 in the radial direction X. The retainer 72 presses the coil 4 against the outer side X1 in the radial direction X via the wedge 41. As shown in FIG. 9, a plurality of retainers 72 are installed in the axial direction Z.

[0034] Specifically, as shown in Fig. 13, the presser 72 is formed in the shape of a rectangular plate to be inserted into the groove 62. Therefore, the length H4 of the presser 72 in the radial direction X is long enough to be inserted into and engaged with the groove 62 having a length H3 in the radial direction X. The presser 72 has long sides 721 with a width W3 that is longer than the width W1 (see Fig. 14) of the opening 51 of the slot 5 in the circumferential direction Y. The diagonal line of the presser 72 has a width W4 that is shorter than the width W1 of the opening 51 of the slot 5 in the circumferential direction Y. The presser 72 also has short sides 722 that are shorter than the width W1 of the opening 51 of the slot 5 in the circumferential direction Y. Each corner of the rectangle of the presser 72 is rounded.

[0035] 15, the long side 721 of the retainer 72 is inserted into the groove 62 so as to straddle the opening 51 of the slot 5 in the circumferential direction Y. For this reason, the width W3 of the long side 721 of the retainer 72 is formed to a length that allows it to be inserted into and engaged with the groove 62 having a width W5 in the circumferential direction Y between the bottoms of the grooves 62 formed on the opposing side surfaces 31 of the teeth 3 adjacent in the circumferential direction Y (see FIG. 14A).

[0036] Next, a method for manufacturing the stator 10 of the rotating electric machine 100 according to the second embodiment configured as described above will be described. First, as in the first embodiment, the coils 4 and wedges 41 are inserted into the slots 5 of the stator core 11 (FIG. 14A). Next, as shown by the bold outline arrow in FIG. 15A, the retainer 72 is moved from the inner side X2 in the radial direction X to the outer side X1 in the radial direction X so that the short side 722 of the retainer 72 is aligned in the up-down direction of the axial direction Z, thereby placing the retainer 72 in the slot 5.

[0037] Then, the retainer 72 is rotated clockwise or counterclockwise as shown by the thin white arrow in Fig. 15A so that the long side 721 of the retainer 72 is oriented in the circumferential direction Y, and both ends of the long side 721 of the retainer 72 are inserted into the groove 62 (Figs. 14B and 15B). As a result, the retainer 72 presses the coil 4 toward the outer side X1 in the radial direction X via the wedge 41. Note that the corners of the rectangle of the retainer 72 are rounded, which allows the retainer 72 to be smoothly inserted into the groove 62 as it is rotated.

[0038] Then, similar operations are performed to insert the retainers 72 into multiple locations in the axial direction Z of the grooves 62 extending in the axial direction Z. As a result, the wedges 41 are arranged without having the function of fixing the coils 4 themselves, but are fixed by the retainers 72. This allows the wedges 41 to reliably prevent the coils 4 from protruding from the slots 5. Furthermore, the wedges 41 and the retainers 72 are installed in all of the slots 5, and the stator 10 of the rotating electric machine 100 is manufactured as shown in FIG. 9.

[0039] Because the stator 10 of the rotating electric machine 100 is assembled in this manner, the load and time required for inserting the wedge 41 and the retainer 72 can be reduced, as in the first embodiment. Furthermore, as in the first embodiment, friction between the wedge 41 and the coil 4 is reduced when inserting the wedge 41, reducing damage to the coil 4. Furthermore, because friction is reduced when inserting the wedge 41, no force is required, and anyone can insert the wedge 41 with the same quality. Furthermore, the retainer 72 can be installed in the groove 62 simply by rotating it, which provides excellent workability. Furthermore, because the retainer 72 has a simple rectangular plate-like configuration, it can be produced at low cost.

[0040] The stator of the rotating electric machine according to the second embodiment configured as described above has the same effects as those of the first embodiment, and also has the following advantages: The groove is formed to extend from one end side to the other end side in the axial direction, The presser is formed in a rectangular plate shape to be inserted into the groove, The rectangle has a long side longer than the circumferential width of the opening of the slot and a diagonal shorter than the circumferential width of the opening of the slot. The long side of the pressing tool is inserted into the groove so as to straddle the opening of the slot in the circumferential direction, A plurality of the holding tools are installed in the axial direction. So, The clamping tool can be installed with excellent workability, and the clamping tool's simple structure allows it to be manufactured at low cost.

[0041] Embodiment 3 FIG. 16 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to the third embodiment. FIG. 17 is a diagram showing the configuration of the stator holder shown in FIG. FIG. 18A is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 18B is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 19A is a partial perspective view showing a method for manufacturing the stator shown in FIG. FIG. 19B is a partial perspective view showing a method for manufacturing the stator shown in FIG. In each drawing, the same parts as those in the above-described embodiments are denoted by the same reference numerals.

[0042] In the third embodiment, the description of the same parts as those in the above-described embodiments will be omitted as appropriate, and the description will focus on the differences. In the above-described embodiments, the clamps 71 and 72 are formed so that their length in the axial direction Z is shorter than the length of the slot 5 in the axial direction Z. Therefore, it was necessary to install multiple clamps 71 and 72 in the axial direction Z for one slot 5. In the third embodiment, the length in the axial direction Z of the clamp 73 is formed to be the same as the length in the axial direction Z of the slot 5, and a case will be described in which one clamp 73 is installed for one slot 5. Note that the groove 62 is the same as in the second embodiment, and therefore its description will be omitted.

[0043] As shown in FIG. 18B , the presser 73 is inserted into the groove 62 so as to straddle the opening 51 of the slot 5 in the circumferential direction Y, and is installed in the slot 5 on the inner side X2 in the radial direction X of the wedge 41. The presser 73 presses the coil 4 on the outer side X1 in the radial direction X via the wedge 41. As shown in FIG. 16 , one presser 73 is installed per slot 5.

[0044] Specifically, as shown in Fig. 17, the presser 73 is formed in the shape of a corrugated, elastically deformable plate that continues in the axial direction Z. As shown in Fig. 16 and Fig. 19, when viewed in the radial direction X, the presser 73 is alternately inserted into the grooves 62 so as to straddle the openings 51 of the slots 5 in the circumferential direction Y. For this reason, the width W6 in the circumferential direction Y (see Fig. 17) of the presser 73 is formed to be a length that allows it to be inserted into and engaged with the grooves 62 that have a width W5 in the circumferential direction Y (see Fig. 18A) between the bottoms of the grooves 62 formed on the opposing side surfaces 31 of the teeth 3 that are adjacent in the circumferential direction Y.

[0045] Next, a method for manufacturing the stator 10 of the rotating electric machine 100 according to the third embodiment configured as described above will be described. First, as in the above-described embodiments, the coils 4 and wedges 41 are inserted into the slots 5 of the stator core 11 (FIG. 18A). Next, as shown by the arrow in FIG. 19A, the presser 73 is moved from the inner side X2 in the radial direction X toward the outer side X1 in the radial direction X, and the presser 73 is positioned in the slots 5.

[0046] Then, by utilizing the elastic deformation of the clamp 73, the clamp 73 is moved appropriately in either direction of the arrow in Figure 19B, and both ends of the clamp 73 in the circumferential direction Y are inserted into the groove 62 from one end side to the other end side in the axial direction Z, and the openings 51 of the slots 5 are inserted alternately into the groove 62 so as to straddle the circumferential direction Y when viewed in the radial direction X (Figures 18B and 19B).

[0047] As a result, the presser 73 presses the coil 4 toward the outside X1 in the radial direction X via the wedge 41. The wedge 41 is arranged without having the function of fixing the coil 4 itself, but the wedge 41 is fixed by the presser 73. This allows the wedge 41 to reliably prevent the coil 4 from protruding from the slot 5. Then, the wedges 41 and the presser 73 are installed in all of the slots 5, and the stator 10 of the rotating electric machine 100 is manufactured as shown in FIG. 16 .

[0048] Because the stator 10 of the rotating electric machine 100 is assembled in this manner, similar to the above-described embodiments, it is possible to reduce the load and time required for inserting the wedge 41 and the elastically deformable retainer 73. Furthermore, similar to the above-described embodiments, friction between the wedge 41 and the coil 4 is reduced when inserting the wedge 41, thereby reducing damage to the coil 4. Furthermore, since friction is reduced when inserting the wedge 41, no force is required, and anyone can insert the wedge 41 with the same quality. Furthermore, the retainer 73 can be installed in the groove 62 simply by elastically deforming it, which provides excellent workability. Furthermore, since the retainer 73 is formed continuously from one end to the other end in the axial direction Z, it is possible to reliably prevent the retainer 73 from falling off.

[0049] The stator of the rotating electric machine according to the third embodiment configured as described above has the same effects as those of the above-described embodiments, and also has the following advantages: The groove is formed to extend from one end side to the other end side in the axial direction, The presser is formed in the shape of an elastically deformable wave-shaped plate that is continuous in the axial direction, and is alternately inserted into the groove so as to straddle the opening of the slot in the circumferential direction when viewed in the radial direction. So, This prevents the clamp from falling off.

[0050] Embodiment 4 FIG. 20 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to the fourth embodiment. FIG. 21 is a diagram showing the configuration of the stator holder shown in FIG. FIG. 22A is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 22B is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 23A is a partial perspective view showing a method for manufacturing the stator shown in FIG. FIG. 23B is a partial perspective view showing a method for manufacturing the stator shown in FIG. In each drawing, the same parts as those in the above-described embodiments are denoted by the same reference numerals.

[0051] In this fourth embodiment, the description of the same parts as those in the above-mentioned embodiments will be omitted as appropriate, and the description will focus on the differences. In the above-mentioned third embodiment, an example was shown in which the presser 73 was formed in the shape of a corrugated, elastically deformable plate that is continuous in the axial direction Z, but in this fourth embodiment, an example of the presser 74 that is formed in the shape of a crank-shaped, elastically deformable plate that is continuous in the axial direction Z will be described. Note that the groove 62 is the same as in the above-mentioned embodiments, so the description thereof will be omitted.

[0052] As shown in FIG. 22B , the presser 74 is inserted into the groove 62 so as to straddle the opening 51 of the slot 5 in the circumferential direction Y, and is installed within the slot 5 on the inner side X2 in the radial direction X of the wedge 41. The presser 74 presses the coil 4 on the outer side X1 in the radial direction X via the wedge 41. As shown in FIG. 20 , one presser 74 is installed per slot 5.

[0053] Specifically, as shown in Fig. 21, the presser 74 is formed in the shape of a crank-shaped elastically deformable plate that is continuous in the axial direction Z. Then, as shown in Fig. 20 and Fig. 23, when viewed in the radial direction X, the presser 74 is alternately inserted into the grooves 62 so as to straddle the openings 51 of the slots 5 in the circumferential direction Y. For this reason, the width W7 in the circumferential direction Y (see Fig. 21) of the presser 74 is formed to a length that allows it to be inserted into and engaged with the grooves 62 that have a width W5 in the circumferential direction Y (see Fig. 22A) between the bottoms of the grooves 62 formed on the opposing side surfaces 31 of the teeth 3 that are adjacent in the circumferential direction Y.

[0054] Next, a method for manufacturing the stator 10 of the rotating electric machine 100 according to the fourth embodiment configured as described above will be described. First, as in the above-described embodiments, the coils 4 and wedges 41 are inserted into the slots 5 of the stator core 11 (FIG. 22A). Next, as shown by the arrow in FIG. 23A, the presser 74 is moved from the inner side X2 in the radial direction X toward the outer side X1 in the radial direction X, and the presser 74 is positioned in the slot 5.

[0055] Then, by utilizing the elastic deformation of the clamp 74, the clamp 74 is moved appropriately in either direction of the arrow in Figure 23B, and both ends of the clamp 74 in the circumferential direction Y are inserted into the groove 62 from one end side to the other end side in the axial direction Z, and the openings 51 of the slots 5 are inserted alternately into the groove 62 so as to straddle the circumferential direction Y when viewed in the radial direction X (Figures 22B and 23B).

[0056] As a result, the presser 74 presses the coil 4 toward the outside X1 in the radial direction X via the wedge 41. The wedge 41 is arranged without having the function of fixing the coil 4 itself, but the wedge 41 is fixed by the presser 74. This ensures that the wedge 41 prevents the coil 4 from protruding from the slot 5. Then, the wedges 41 and the presser 74 are installed in all of the slots 5, and the stator 10 of the rotating electric machine 100 is manufactured as shown in FIG. 20.

[0057] Because the stator 10 of the rotating electric machine 100 is assembled in this manner, similar to the above-described embodiments, it is possible to reduce the load and time required for inserting the wedge 41 and the elastically deformable retainer 74. Furthermore, similar to the above-described embodiments, friction between the wedge 41 and the coil 4 is reduced when inserting the wedge 41, thereby reducing damage to the coil 4. Furthermore, since friction is reduced when inserting the wedge 41, no force is required, and anyone can insert the wedge 41 with the same quality. Furthermore, the retainer 74 can be installed in the groove 62 simply by elastically deforming it, which provides excellent workability. Furthermore, since the retainer 74 is formed continuously from one end to the other end in the axial direction Z, it is possible to reliably prevent the retainer 74 from falling off.

[0058] The stator of the rotating electric machine of the fourth embodiment configured as described above has the same effects as those of the above-described embodiments, and also has the following advantages: The groove is formed to extend from one end side to the other end side in the axial direction, The presser is formed in the shape of an elastically deformable crank-shaped plate that is continuous in the axial direction, and is alternately inserted into the groove so as to straddle the opening of the slot in the circumferential direction when viewed in the radial direction. So, This prevents the clamp from falling off.

[0059] In each of the above embodiments, an example has been shown in which a wedge 41 is installed in the slot 5. In the following fifth to eighth embodiments, a case will be described in which a wedge 41 is not installed. That is, only retainers 71, 72, 73, and 74 are installed, respectively, to prevent the coil 4 from protruding from the slot 5 of the stator core 11. These are examples in which retainers 71, 72, 73, and 74 are generally used as wedges.

[0060] Embodiment 5 FIG. 24 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to the fifth embodiment. FIG. 25A is a partial cross-sectional view showing a method for manufacturing the stator shown in FIG. FIG. 25B is a partial cross-sectional view showing a method for manufacturing the stator shown in FIG. FIG. 26 is a partial perspective view showing a method for manufacturing the stator shown in FIG. In each drawing, the same parts as those in the above-described embodiments are denoted by the same reference numerals.

[0061] In the present fifth embodiment, the description of the same parts as those in the above-mentioned embodiments will be omitted as appropriate, and the description will focus on the differences. As in the above-mentioned first embodiment, as shown in Fig. 25, grooves 61 each having an opening 611 and a step 612 are formed on the opposing side surfaces 31 of teeth portions 3 adjacent to each other in the circumferential direction Y, and a pressing tool 71 is provided to be inserted into the groove 61. The length of the portion of the pressing tool 71 inserted into the groove 61 in the axial direction Z is shorter than the length of the slot 5 in the axial direction Z. The configuration of the pressing tool 71 is the same as in the above-mentioned first embodiment.

[0062] Unlike the first embodiment, the wedge 41 is not installed in the slot 5, and therefore the coil 40 can be installed in the slot 5 up to the position where the wedge 41 was installed, thereby improving the space factor of the coil 40 in the slot 5. Note that the improvement in the space factor of the coil 40 in the slot 5 due to the wedge 41 not being installed in the slot 5 is the same in the sixth to eighth embodiments below, and therefore a description thereof will be omitted as appropriate.

[0063] As shown in Fig. 25B, the coil 4 and the presser 71 are placed in the slot 5 in this order from the outer side X1 in the radial direction X. The presser 71 is inserted into the groove 61, which has an opening 611 and a step 612, so as to straddle the opening 51 of the slot 5 in the circumferential direction Y, and presses the coil 40 against the outer side X1 in the radial direction X within the slot 5. Note that as shown in Fig. 25B, the claw 712 is inserted into the groove 61 and is engaged with the step 612 of the groove 61 in the radial direction X.

[0064] Next, a method for manufacturing the stator of the rotating electric machine of the fifth embodiment configured as described above will be described. First, continuous coils 40 for distributed winding are inserted and installed in slots 5 of stator core 11 (FIG. 25A). Next, as shown by the arrow in FIG. 26, presser 71 is moved from inner side X2 in radial direction X of stator core 11 toward outer side X1 in radial direction X, and presser 71 is inserted into groove 61 of stator 10 (FIG. 25B). As a result, presser 71 presses coil 40 toward outer side X1 in radial direction X.

[0065] The retainer 71 is formed with claws 712, which are engaged with the step portions 612 of the grooves 61 in the radial direction X, preventing the retainer 71 from coming off. The grooves 61 are formed in several places in the axial direction Z of the slots 5 of the stator 10, and by inserting the retainer 71 into all of the grooves 61, the coils 40 can be securely housed in the slots 5. Then, the retainer 71 is installed in all of the slots 5, and the stator 10 of the rotating electric machine 100 is manufactured as shown in FIG. 24 .

[0066] Since the stator 10 of the rotating electric machine 100 is assembled in this manner, the presser 71 is simply inserted into the groove 61, preventing the coil 40 from protruding from the slot 5, and therefore, anyone can manufacture the stator 10 with the same quality.

[0067] According to the stator of the rotating electric machine of the fifth embodiment configured as described above, a stator core having an annular yoke portion and a plurality of teeth protruding radially inward from an inner peripheral surface of the yoke portion at intervals in the circumferential direction; a coil housed in a slot formed between the teeth portions adjacent in the circumferential direction, a presser that is inserted into grooves formed on opposing side surfaces of the circumferentially adjacent teeth so as to straddle the opening of the slot in the circumferential direction, and is installed radially inside the coil within the slot to press the coil radially outward, The axial length of the portion of the presser inserted into the groove is shorter than the axial length of the slot. So, This prevents the coil from rubbing against the retainer, improves workability, and allows for efficient assembly of the stator of the rotating electrical machine. Also, the space factor of the coil in the slot can be improved.

[0068] Furthermore, according to the stator of the rotating electric machine of the fifth embodiment configured as described above, A plurality of the grooves are formed in the axial direction, and a plurality of the pressing tools are installed therein. the groove is formed so as to open to the inside in the radial direction of the tooth portion and extend radially outward by a predetermined length, and the radially outer end portion has a step portion recessed in the circumferential direction, The pressing tool includes a plate portion extending in a circumferential direction of the opening of the slot, and claw portions extending radially outward from both circumferential ends of the plate portion, with the radially outer ends protruding toward the side opposite the plate portion in the circumferential direction, The claw portion is inserted into the groove and engaged with the step portion of the groove in the radial direction. So, Since the claws of the presser are engaged with the stepped portions of the grooves, the presser is reliably prevented from falling off, and the coil can be reliably pressed by the presser.

[0069] Embodiment 6 FIG. 27 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to the sixth embodiment. FIG. 28A is a partial plan view showing a manufacturing method of the stator shown in FIG. FIG. 28B is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 29A is a partial perspective view showing a method for manufacturing the stator shown in FIG. FIG. 29B is a partial perspective view showing a method for manufacturing the stator shown in FIG. In each drawing, the same parts as those in the above-described embodiments are denoted by the same reference numerals.

[0070] In this sixth embodiment, examples of the groove 62 and the retainer 72 will be described. As shown in FIG. 29 , the groove 62 is formed on each of the opposing side surfaces 31 of the teeth 3 adjacent to each other in the circumferential direction Y, and extends from one end to the other end in the axial direction Z. The retainer 72 is inserted into the groove 62 so as to straddle the opening 51 of the slot 5 in the circumferential direction Y, and is placed on the inner side X2 of the coil 40 in the radial direction X within the slot 5, pressing the coil 40 against the outer side X1 in the radial direction X. As shown in FIG. 27 , a plurality of retainers 72 are placed in the axial direction Z. Therefore, the length of the portion of the retainer 72 inserted into the groove 62 in the axial direction Z is shorter than the length of the slot 5 in the axial direction Z. The configuration of the retainer 72 is the same as that of the second embodiment.

[0071] Next, a method for manufacturing the stator 10 of the rotating electric machine 100 according to the sixth embodiment configured as described above will be described. First, as in the above-described embodiments, the coil 40 is inserted into the slot 5 of the stator core 11 (FIG. 28A). Next, as shown by the bold outline arrow in FIG. 29A, the presser 72 is moved from the inner side X2 in the radial direction X to the outer side X1 in the radial direction X so that the short side 722 of the presser 72 is aligned in the up-down direction of the axial direction Z, and the presser 72 is positioned in the slot 5.

[0072] Then, the retainer 72 is rotated clockwise or counterclockwise as shown by the thin white arrow in FIG. 29A so that the long side 721 of the retainer 72 is aligned with the circumferential direction Y, and both ends of the long side 721 of the retainer 72 are inserted into the groove 62 (FIGS. 28B and 29B). As a result, the retainer 72 presses the coil 40 toward the outside X1 in the radial direction X. Note that the corners of the rectangle of the retainer 72 are rounded, which allows smooth insertion into the groove 62 as the retainer 72 is rotated. Then, the same operation is performed to insert the retainer 72 into multiple locations in the axial direction Z of the groove 62 extending in the axial direction Z. Furthermore, the retainer 72 is installed in all of the slots 5, and the stator 10 of the rotating electric machine 100 is manufactured as shown in FIG. 27.

[0073] Since the stator 10 of the rotating electric machine 100 is assembled in this manner, it is possible to reduce the load and time required for inserting the retainer 72, as in the above-described embodiments. Furthermore, the retainer 72 can be installed in the groove 62 simply by rotating it, which provides excellent workability. Furthermore, since the retainer 72 has a simple rectangular plate-like configuration, it can be produced at low cost.

[0074] The stator of the rotating electric machine according to the sixth embodiment configured as described above has the same effects as those of the first embodiment, and also has the following advantages: The groove is formed to extend from one end side to the other end side in the axial direction, The presser is formed in a rectangular plate shape to be inserted into the groove, The rectangle has a long side longer than the circumferential width of the opening of the slot and a diagonal shorter than the circumferential width of the opening of the slot. The long side of the pressing tool is inserted into the groove so as to straddle the opening of the slot in the circumferential direction, A plurality of the holding tools are installed in the axial direction. So, The clamp can be installed with excellent workability, and the clamp can be manufactured at low cost due to its simple structure.

[0075] Embodiment 7 FIG. 30 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to the seventh embodiment. FIG. 31A is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 31B is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 32A is a partial perspective view showing a method for manufacturing the stator shown in FIG. FIG. 32B is a partial perspective view showing a method for manufacturing the stator shown in FIG. In each drawing, the same parts as those in the above-described embodiments are denoted by the same reference numerals.

[0076] In the seventh embodiment, the description of the same parts as those in the above-described embodiments will be omitted as appropriate, and the description will focus on the differences. As shown in FIG. 32B , the presser members 73 are alternately inserted into the grooves 62 so as to straddle the openings 51 of the slots 5 in the circumferential direction Y when viewed in the radial direction X. The presser members 73 are installed in the slots 5 on the inner side X2 of the coil 40 in the radial direction X and press the coil 40 on the outer side X1 in the radial direction X. As shown in FIG. 30 , one presser member 73 is installed per slot 5. Therefore, the length in the axial direction Z of the portion of the presser member 73 inserted in the groove 62 is shorter than the length in the axial direction Z of the slot 5. The configuration of the presser members 73 is the same as that of the third embodiment.

[0077] Next, a method for manufacturing the stator 10 of the rotating electric machine 100 according to the seventh embodiment configured as described above will be described. First, as in the above-described embodiments, the coils 40 are inserted into the slots 5 of the stator core 11 (FIG. 31A). Next, as shown by the arrow in FIG. 32A, the presser 73 is moved from the inner side X2 in the radial direction X toward the outer side X1 in the radial direction X, and the presser 73 is positioned in the slots 5.

[0078] Then, while utilizing the elastic deformation of the presser 73, the presser 73 is moved appropriately in either direction of the arrow in FIG. 32B, and both ends of the presser 73 in the circumferential direction Y are inserted into the groove 62 from one end side to the other end in the axial direction Z, and the presser 73 is alternately inserted into the groove 62 so that the openings 51 of the slots 5 straddle the circumferential direction Y when viewed in the radial direction X (FIGS. 31B and 32B). As a result, the presser 73 presses the coil 40 toward the outside X1 in the radial direction X. Then, the presser 73 is installed in all of the slots 5, and the stator 10 of the rotating electric machine 100 is manufactured as shown in FIG.

[0079] Since the stator 10 of the rotating electric machine 100 is assembled in this manner, it is possible to reduce the load and time required for inserting the elastically deformable retainer 73, as in the above-described embodiments. Furthermore, the retainer 73 can be installed in the groove 62 simply by elastically deforming it, which provides excellent workability. Furthermore, since the retainer 73 is formed continuously from one end to the other end in the axial direction Z, it is possible to reliably prevent the retainer 73 from falling off.

[0080] The stator of the rotating electric machine according to the seventh embodiment configured as described above has the same effects as those of the above-described embodiments, and also has the following advantages: The groove is formed to extend from one end side to the other end side in the axial direction, The presser is formed in the shape of an elastically deformable wave-shaped plate that is continuous in the axial direction, and is alternately inserted into the groove so as to straddle the opening of the slot in the circumferential direction when viewed in the radial direction. So, This prevents the clamp from falling off.

[0081] Embodiment 8 FIG. 33 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to the eighth embodiment. FIG. 34A is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 34B is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 35A is a partial perspective view showing a method for manufacturing the stator shown in FIG. FIG. 35B is a partial perspective view showing a method for manufacturing the stator shown in FIG. In each drawing, the same parts as those in the above-described embodiments are denoted by the same reference numerals.

[0082] In the present eighth embodiment, the description of the same parts as those in the above-mentioned embodiments will be omitted as appropriate, and the description will focus on the differences. In the above-mentioned seventh embodiment, an example was shown in which the presser 73 was formed in the shape of a corrugated, elastically deformable plate that is continuous in the axial direction Z, but in the present eighth embodiment, an example of the presser 74 that is formed in the shape of a crank-shaped, elastically deformable plate that is continuous in the axial direction Z will be described. Note that the groove 62 is the same as in the above-mentioned embodiments, and therefore the description thereof will be omitted.

[0083] As shown in FIG. 35B, the presser 74 is inserted into the groove 62 so as to straddle the opening 51 of the slot 5 in the circumferential direction Y, and presses the coil 40 to the outside X1 in the radial direction X within the slot 5. As shown in FIG. 33, one presser 74 is installed per slot 5. Therefore, the length in the axial direction Z of the portion of the presser 74 inserted into the groove 62 is shorter than the length in the axial direction Z of the slot 5. The configuration of the presser 74 is the same as in the fourth embodiment.

[0084] Next, a method for manufacturing the stator 10 of the rotating electric machine 100 according to the eighth embodiment configured as described above will be described. First, as in the above-described embodiments, the coils 40 are inserted into the slots 5 of the stator core 11 (FIG. 34A). Next, as shown by the arrow in FIG. 35A, the presser 74 is moved from the inner side X2 in the radial direction X toward the outer side X1 in the radial direction X, and the presser 74 is positioned in the slots 5.

[0085] Then, using the elastic deformation of the presser 74, the presser 74 is moved appropriately in either direction of the arrow in FIG. 35B, and both ends of the presser 74 in the circumferential direction Y are inserted into the groove 62 from one end side to the other end side in the axial direction Z, and the presser 74 is alternately inserted into the groove 62 so as to straddle the openings 51 of the slots 5 in the circumferential direction Y when viewed in the radial direction X (FIGS. 34B and 35B). As a result, the presser 74 presses the coil 40 toward the outside X1 in the radial direction X. Then, the presser 74 is installed in all of the slots 5, and the stator 10 of the rotating electric machine 100 is manufactured as shown in FIG. 20.

[0086] Since the stator 10 of the rotating electric machine 100 is assembled in this manner, similar to the above-described embodiments, it is possible to reduce the load and time required for inserting the elastically deformable retainer 74. Furthermore, the retainer 74 can be installed in the groove 62 simply by elastically deforming it, which provides excellent workability. Furthermore, since the retainer 74 is formed continuously from one end side to the other end side in the axial direction Z, it is possible to reliably prevent the retainer 74 from falling off.

[0087] According to the stator of the rotating electric machine of the eighth embodiment configured as above, the same effects as those of the above-mentioned embodiments can be achieved, and in addition, The groove is formed to extend from one end side to the other end side in the axial direction, The presser is formed in the shape of an elastically deformable crank-shaped plate that is continuous in the axial direction, and is alternately inserted into the groove so as to straddle the opening of the slot in the circumferential direction when viewed in the radial direction. So, This prevents the clamp from falling off.

[0088] Embodiment 9 36 is a partial perspective view showing the configuration of a stator of a rotary electric machine according to the ninth embodiment. Fig. 37 is a perspective view showing the configuration of the stator core of the stator shown in Fig. 36. Note that Fig. 37 shows only the locations where the first grooves 63 and the second grooves 64 are formed. FIG. 38 is a partial perspective view showing the configuration of the stator core shown in FIG.

[0089] FIG. 39A is a partial perspective view showing the configuration of a portion of the stator core shown in FIG. 38 surrounded by a dotted line Q1. FIG. 39B is a partial enlarged view showing the configuration of the portion of the stator core surrounded by the dotted line Q2 shown in FIG. FIG. 40A is a diagram showing the configuration of the stator holder shown in FIG. FIG. 40B is a diagram showing the portion of the presser tool in FIG. 40A surrounded by a dotted line Q3. FIG. 40C is a diagram showing the portion of the presser tool in FIG. 40A surrounded by a dotted line Q4.

[0090] FIG. 41A is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 41B is a partial plan view showing a method of manufacturing the stator shown in FIG. FIG. 42A is a partial cross-sectional view showing a method for manufacturing the stator shown in FIG. FIG. 42B is a partial cross-sectional view showing a method for manufacturing the stator shown in FIG. FIG. 43A is a partial perspective view showing a method for manufacturing the stator shown in FIG. FIG. 43B is a partial side view showing a method of manufacturing the stator shown in FIG. In each drawing, the same parts as those in the above-described embodiments are denoted by the same reference numerals.

[0091] 36, the wedge 75 extends from one end side to the other end side in the axial direction Z, and is disposed within the slot 5 on an inner side X2 in the radial direction X than the coil 40. This allows the wedge 75 to prevent the coil 40 from protruding from the slot 5. As shown in FIG. 40, the wedge 75 is formed to have a width W8 in the circumferential direction Y that is smaller than the width W1 in the circumferential direction Y (see FIG. 41A) of the opening 51 on the inner side X2 in the radial direction X of the slot 5, and has a first protrusion 751 and a second protrusion 752 at one end in the axial direction Z and a central portion in the axial direction Z, the first protrusion 751 and the second protrusion 752 having widths W9 and W10 in the circumferential direction Y that are larger than the width W1 in the circumferential direction Y of the opening 51 of the slot 5.

[0092] 38 and 39, a first groove 63 is formed on the opposing side surfaces 31 of teeth 3 adjacent in the circumferential direction Y, the first groove 63 having an opening 631 on one end side in the axial direction Z and recessed in the circumferential direction Y and the other end sides in the axial direction Z, and a second groove 64 having an opening 641 on the inner side X2 in the radial direction X at the center in the axial direction Z, extending to the outer side X1 in the radial direction X and further extending to the other end side in the axial direction Z. The first protrusion 751 of the wedge 75 is inserted into the first groove 63, and the second protrusion 752 is inserted into the second groove 64, each so as to straddle the opening 51 of the slot 5 in the circumferential direction Y (see FIGS. 41B and 42B).

[0093] For this reason, the first protrusion 751 of the wedge 75 has a width W9 in the circumferential direction Y that is a length that allows it to be inserted into and engaged with the first groove 63, which has a width W11 in the circumferential direction Y between the bottoms of the first grooves 63 formed on the opposing side surfaces 31 of the teeth 3 adjacent to each other in the circumferential direction Y (see FIG. 41A).Furthermore, the wedge 75 has a width W10 in the circumferential direction Y of the second protrusion 752, which has a width W12 in the circumferential direction Y between the second grooves 64 formed on the opposing side surfaces 31 of the teeth 3 adjacent to each other in the circumferential direction Y (see FIG. 42A).

[0094] Furthermore, the first protrusion 751 of the wedge 75 has a length T6 in the axial direction Z that allows it to be inserted into and engaged with the first groove 63, which has a length T3 in the axial direction Z of the first groove 63 formed on the opposing side surfaces 31 of the teeth 3 adjacent to each other in the circumferential direction Y (see FIGS. 39A and 40B). The second protrusion 752 of the wedge 75 has a length T7 in the axial direction Z that allows it to be inserted into and engaged with the second groove 64, which has a length T4 in the axial direction Z of an opening between the bottoms of the second grooves 64 formed on the opposing side surfaces 31 of the teeth 3 adjacent to each other in the circumferential direction Y and a length T5 in the axial direction Z of a recessed portion on the outer side X1 in the radial direction X (see FIGS. 39B and 40C). The length T3 of the first groove 63 and the lengths T4 and T5 of the second groove 64 are substantially the same.

[0095] Next, a method for manufacturing the stator 10 of the rotating electric machine 100 according to the ninth embodiment configured as described above will be described. First, as in the above-described embodiments, the coils 4 are inserted into the slots 5 of the stator core 11 (FIGS. 41A and 42B). Next, as shown by the arrow in FIG. 43A, the wedge 75 is moved from the inner side X2 in the radial direction X toward the outer side X1 in the radial direction X, and the wedge 75 is placed in the slot 5.

[0096] As a result, the wedge 75 is inserted into the slot 5 from the opening 51 of the slot 5 at a location other than where the first protrusion 751 and the second protrusion 752 are formed. At this time, the wedge 75 is formed so that the width W8 in the circumferential direction Y of the wedge 75 at a location other than where the first protrusion 751 and the second protrusion 752 are formed is smaller than the width W1 in the circumferential direction Y of the opening 51 of the slot 5, and therefore the wedge 75 can be easily inserted into the slot 5 from the opening 51.

[0097] Then, the first protrusion 751 of the wedge 75 moves radially outward on one end side of the axial direction Z of the stator core 11 without being inserted into the slot 5, and the second protrusion 752 of the wedge 75 is inserted through the opening 641 of the second groove 64 and positioned on the outer side X1 in the radial direction X.

[0098] Then, as shown by the arrow in FIG. 43B , the wedge 75 is moved from one end side to the other end side in the axial direction Z, and the first protrusion 751 of the wedge 75 is inserted into the first groove 63 from the opening 631 on one end side of the axial direction Z of the first groove 63. Also, the second protrusion 752 of the wedge 75 is inserted into the recessed portion on the other end side in the axial direction Z of the outer side X1 in the radial direction X of the second groove 64, and is inserted into the second groove 64. As a result, the presser 73 presses the coil 40 toward the outer side X1 in the radial direction X. Then, the wedges 75 are installed in all of the slots 5, and the stator 10 of the rotating electric machine 100 is manufactured as shown in FIG.

[0099] Because the stator 10 of the rotating electric machine 100 is assembled in this manner, the load and time required for inserting the wedge 75 can be reduced compared to the conventional method of inserting the wedge from one axial end to the other. Furthermore, friction between the wedge 75 and the coil 4 is reduced when inserting the wedge 75, reducing damage to the coil 4. Furthermore, because friction is reduced when inserting the wedge 75, the wedge 75 can be inserted with less force, allowing anyone to insert the wedge 75 with the same quality. Furthermore, the axial distance by which the wedge 75 is inserted into the stator core 11 can be made shorter than in the conventional method, improving ease of insertion.

[0100] According to the stator of the rotating electric machine of the ninth embodiment configured as described above, a stator core having an annular yoke portion and a plurality of teeth protruding radially inward from an inner peripheral surface of the yoke portion at intervals in the circumferential direction; a coil housed in a slot formed between the teeth portions adjacent in the circumferential direction, a wedge extending from one end side to the other end side in the axial direction and disposed radially inward of the coil within the slot; the wedge is formed to have a circumferential width smaller than the circumferential width of the opening on the radial inner side of the slot, and has a first convex portion and a second convex portion at one axial end and a central portion in the axial direction, the first convex portion and the second convex portion having a circumferential width larger than the circumferential width of the opening on the radial inner side of the slot, On the opposing side surfaces of the teeth portions adjacent in the circumferential direction, a first groove that is open at one end in the axial direction and recessed in the circumferential direction and toward the other end in the axial direction; and a second groove that is open at the center in the axial direction at the inner side in the radial direction, extends toward the outer side in the radial direction, and is recessed in an L shape that further extends toward the other end in the axial direction. The first protrusion of the wedge is inserted into the first groove, and the second protrusion is inserted into the second groove so as to straddle the opening of the slot in the circumferential direction. So, This prevents the coil and the wedge from rubbing against each other, improves workability, and enables the stator of the rotating electrical machine to be assembled with high productivity.

[0101] Although various exemplary embodiments and examples are described in this disclosure, the various features, aspects, and functions described in one or more embodiments are not limited to the application of a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless variations not illustrated are contemplated within the scope of the technology disclosed in this specification. For example, this includes cases where at least one component is modified, added, or omitted, and further cases where at least one component is extracted and combined with components of another embodiment. [Explanation of symbols]

[0102] 10 stator, 100 rotating electric machine, 11 stator core, 2 yoke portion, 20 rotor, 200 rotating shaft, 201 housing, 3 teeth portion, 31 side surface, 4 coil, 40 coil, 41 wedge, 5 slot, 51 opening, 61 groove, 611 opening, 62 groove, 63 first groove, 631 opening, 64 second groove, 641 opening, 71 retainer, 711 plate portion, 712 claw portion, 72 retainer, 721 long side, 722 short side, 73 clamp, 74 clamp, 75 wedge, 751 first convex portion, 752 second convex portion, X radial direction, X1 outer side, X2 inner side, Y circumferential direction, Z axial direction.

Claims

1. a stator core having an annular yoke portion and a plurality of teeth protruding radially inward from an inner peripheral surface of the yoke portion at intervals in the circumferential direction; a coil housed in a slot formed between the teeth portions adjacent in the circumferential direction, a wedge located radially inside the coil within the slot and having a circumferential width smaller than a circumferential width of an opening portion of the slot on the radial inside, the wedge extending from one end side to the other end side in the axial direction; a clamp that is inserted into grooves formed on the opposing side surfaces of circumferentially adjacent tooth portions so as to straddle the opening of the slot in the circumferential direction, and is installed radially inside the wedge within the slot, and presses the coil radially outward via the wedge.

2. a stator core having an annular yoke portion and a plurality of teeth protruding radially inward from an inner peripheral surface of the yoke portion at intervals in the circumferential direction; a coil housed in a slot formed between the teeth portions adjacent in the circumferential direction, a presser that is inserted into grooves formed on opposing side surfaces of the circumferentially adjacent teeth so as to straddle the opening of the slot in the circumferential direction, and is installed radially inside the coil within the slot to press the coil radially outward, A stator for a rotating electric machine, wherein the axial length of the portion of the pressing tool inserted into the groove is shorter than the axial length of the slot.

3. A plurality of the grooves are formed in the axial direction, and a plurality of the pressing tools are installed therein. the groove is formed so as to open to the inside in the radial direction of the tooth portion and extend radially outward by a predetermined length, and the radially outer end portion has a step portion recessed in the circumferential direction, The pressing tool includes a plate portion extending in a circumferential direction of the opening of the slot, and claw portions extending radially outward from both circumferential ends of the plate portion, with the radially outer ends protruding toward the side opposite the plate portion in the circumferential direction, 3. The stator for a rotating electric machine according to claim 1, wherein the claws are inserted into the grooves and engaged in the radial direction with the stepped portions of the grooves.

4. The groove is formed to extend from one end side to the other end side in the axial direction, The presser is formed in a rectangular plate shape to be inserted into the groove, The rectangle has a long side longer than the circumferential width of the opening of the slot and a diagonal shorter than the circumferential width of the opening of the slot. The long side of the pressing tool is inserted into the groove so as to straddle the opening of the slot in the circumferential direction, 3. The stator of claim 1, wherein a plurality of the retainers are arranged in the axial direction.

5. The groove is formed to extend from one end side to the other end side in the axial direction, 3. The stator of claim 1 or claim 2, wherein the retaining members are formed in the shape of elastically deformable plates having a wave-like or crank-like shape that is continuous in the axial direction, and are alternately inserted into the grooves so as to straddle the openings of the slots in the circumferential direction when viewed in the radial direction.

6. a stator core having an annular yoke portion and a plurality of teeth protruding radially inward from an inner peripheral surface of the yoke portion at intervals in the circumferential direction; a coil housed in a slot formed between the teeth portions adjacent in the circumferential direction, a wedge extending from one end side to the other end side in the axial direction and disposed radially inward of the coil within the slot; the wedge is formed to have a circumferential width smaller than the circumferential width of the opening on the radial inner side of the slot, and has, at one axial end and a central portion in the axial direction, a first convex portion and a second convex portion having a circumferential width larger than the circumferential width of the opening on the radial inner side of the slot, On the opposing side surfaces of the teeth portions adjacent in the circumferential direction, a first groove that is open at one end in the axial direction and recessed in the circumferential direction and toward the other end in the axial direction; and a second groove that is open at the center in the axial direction at the inner side in the radial direction, extends toward the outer side in the radial direction, and is recessed in an L shape that further extends toward the other end in the axial direction. A stator for a rotating electric machine, in which the first protrusion of the wedge is inserted into the first groove and the second protrusion is inserted into the second groove so as to straddle the opening of the slot in the circumferential direction.

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