JP7294920B2 - Rotating electric machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotating electrical machine, and more particularly to a rotating electrical machine having a stator that forms a stator winding by connecting a plurality of segment conductors incorporated in a stator core.

In a rotating electrical machine, windings are arranged in a plurality of slots formed in a stator core, and power is supplied to the windings to generate a rotating magnetic field, which rotates a rotor. . Rotating electric machines used as power sources for industrial machinery and automobiles are required to be highly efficient. For example, in recent years, in rotating electric machines for driving automobiles, segment conductors using rectangular electric wires are applied as stator windings, and the segment conductors are arranged so as to be stacked radially in the slots of the stator core, thereby reducing the width of the slots. Some have a higher ratio of conductor to cross-sectional area (space factor). As a result, the resistance value of the stator winding is reduced, so that the copper loss that depends on the resistance value can be reduced.

In rotating electric machines using segment conductors, for the purpose of shortening the axial length of the stator winding, etc., the segment conductors divided in the axial direction are placed in the slots of the stator core or in the stator core. Some stator windings are formed by connecting at coil end portions protruding from axial end faces. For example, there are those described in Patent Document 1 and Patent Document 2.

In the rotary electric machine described in Patent Document 1, the partition walls (teeth) of the laminated core (stator core) are pre-pressed so that the upper and lower bottom surfaces of the partition walls (teeth) are parallel to the thickness direction. By releasing the torsion, a circumferential force is applied from the partition wall to the first linear coil member (segment conductor) and the second linear coil member (segment conductor) arranged in the slot of the laminated core. The engaging portions of the first linear coil member and the second linear coil member are crimped to each other. Further, by bending the first linear coil member and the second linear coil member whose engaging portions are crimped to each other, the stator winding wound around the laminated core is formed.

In the rotary electric machine described in Patent Document 2, a plurality of laminated body coils (segment conductors), one end of which is open so as to be wound around the teeth of the stator core (stator core), straddle the teeth. By fitting the ends of bus bars (segment conductors) to two open ends of laminated coils that are radially adjacent to each other across the teeth and facing each other. , in which the stator windings are formed. Furthermore, two discs sandwiching the stator winding from both sides in the axial direction are fastened with a nut and a bolt passing through the outer circumference of the stator core, and a fastening load parallel to the axial direction of the stator core is applied to the stator winding. , the bus bar and the fitting portion of the open end of the laminated body coil are press-contacted to fix the stator winding.

JP 2013-081335 A JP 2005-137174 A

When a stator winding is formed by connecting a plurality of segment conductors by crimping, fitting, or the like, as in the rotary electric machines described in Patent Documents 1 and 2, a plurality of connecting portions of the segment conductors have In manufacturing, there are variations in dimensions such as axial length within the set tolerance range. If there is a large dimensional variation, some of the plurality of connection portions may be in an insufficient connection state, increasing the contact resistance. In addition, if a plurality of connection portions are uniformly pushed in to connect all of the plurality of connection portions in a good connection state, some of the connection portions may be forced into a state of being pushed in, and the connection portion may be deformed. be.

In the rotary electric machine described in Patent Document 1, by pressing the partition wall of the stator core, a circumferential force is applied to the plurality of segment conductors (the first linear coil member and the second linear coil member). is applied and the engaging portions are connected by crimping, and no axial force is applied to the plurality of segment conductors. Therefore, among the plurality of engaging portions that face each other in the axial direction, the engaging portions that are shorter in the axial direction than the other engaging portions may not be sufficiently crimped to each other, resulting in an increase in contact resistance. In order to satisfactorily crimp all the engaging portions of a plurality of segment conductors, it is necessary to manage the arrangement positions of the plurality of segment conductors, and it is practically difficult to eliminate all insufficiently engaged states. Moreover, the plurality of segment conductors are held only by the bulkhead portions of the stator core and are not fixed in the axial direction. If force acts on the plurality of segment conductors due to heat, vibration, or the like, insufficient holding force of the segment conductors may loosen the crimping of the engaging portions, resulting in insufficient connection.

In the rotary electric machine described in Patent Document 2, a plurality of segment conductors (laminate coils and bus bars) forming a stator winding are axially pressed via two discs sandwiched from both sides in the axial direction. It fixes the stator windings axially. That is, the plurality of segment conductors arranged in the circumferential and radial directions of the stator core are uniformly pressed in the axial direction. Therefore, depending on the degree of variation in axial length due to manufacturing tolerances of the plurality of segment conductors, as described above, some of the plurality of fitting portions of the plurality of segment conductors may be insufficiently connected. There is a risk that contact resistance will increase as a result, or deformation will occur as a result of being forcibly pushed in.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to axially fix a stator winding configured by connecting a plurality of segment conductors, while allowing the segment conductors to rotate. It is an object of the present invention to provide a rotating electrical machine capable of reducing adverse effects caused by tolerances in the connection state of a motor.

The present application includes a plurality of means for solving the above problems. To give an example, a stator core in which a plurality of slots extending in the axial direction are formed at intervals in the circumferential direction, and a part of the above-described A plurality of first segment conductors housed in the slots while protruding to one axial side of the stator core, and a plurality of first segment conductors partially housed in the slots while protruding to the other axial side of the stator core. A stator winding formed by connecting a plurality of second segment conductors by fitting their tip portions facing each other in the axial direction in the slot, and a cylindrical shape holding the stator core inside. a first bracket axially spaced from the axial ends of the plurality of first segment conductors and attached to one axial side of the frame; and the plurality of second segments A second bracket arranged axially apart from the axial ends of the conductors and attached to the other side of the frame in the axial direction is in contact with the axial ends of the plurality of first segment conductors. a movement restricting member having electrical insulation disposed; an insulating member disposed so as to abut against axial ends of the plurality of second segment conductors; and between the insulating member and the second bracket. and an elastic member arranged in the frame so that a pressing force for pressing the plurality of second segment conductors to one side in the axial direction is transmitted through the elastic member and the insulating member , and the frame includes: The inner peripheral surface has a step surface serving as a reference surface in the axial direction, and the movement restricting member is fixed to the frame while being in contact with the step surface.

According to the present invention, the elastic member presses the plurality of second segment conductors through the insulating member toward one side in the axial direction and pushes them toward the plurality of first segment conductors, and the movement restricting member moves the plurality of first segment conductors. By restricting the movement of the segment conductors in the axial direction, the first segment conductors are prevented from coming out of the slots of the stator core, and the plurality of fitting portions of the second segment conductors and the first segment conductors are forcibly disengaged. It is possible to reduce non-uniformity of the fitting state without pushing into the joint. That is, the stator winding formed by connecting a plurality of first segment conductors and second segment conductors is fixed in the axial direction, while reducing the adverse effects caused by tolerances on the connection state between the segment conductors. can be done.
Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is a longitudinal sectional view showing a rotating electric machine according to a first embodiment of the invention; FIG. FIG. 2 is an enlarged cross-sectional view showing a state in which a part of the stator of the rotary electric machine according to the first embodiment of the present invention shown in FIG. 1 is omitted; 3 is a perspective view showing a fitting structure (connection structure) of segment conductors in the stator winding of the rotary electric machine according to the first embodiment of the present invention shown in FIG. 2; FIG. FIG. 4 is an explanatory diagram showing an example of variations in the fitting state of a plurality of fitting portions in a plurality of segment conductors that constitute a stator winding of a rotating electrical machine; It is a longitudinal cross-sectional view showing a rotating electric machine according to a second embodiment of the present invention. FIG. 11 is a perspective view showing an insulating member that constitutes a rotating electric machine according to a third embodiment of the present invention; FIG. 11 is a perspective view showing a movement restricting member that constitutes a rotating electric machine according to a fourth embodiment of the present invention; FIG. 11 is a cross-sectional view showing a pressurizing member that constitutes a rotating electric machine according to a fifth embodiment of the present invention; FIG. 11 is a perspective view showing an elastic member that constitutes a rotating electrical machine according to a sixth embodiment of the present invention; FIG. 11 is a perspective view showing an elastic member that constitutes a rotating electric machine according to a seventh embodiment of the present invention; FIG. 12 is a vertical cross-sectional view showing a rotating electric machine according to an eighth embodiment of the present invention; FIG. 6 is a vertical cross-sectional view showing a rotating electric machine according to another embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a rotary electric machine according to the present invention will be described below with reference to the drawings. The present embodiment will be described by taking as an example a case where the rotary electric machine of the present invention is applied to a permanent magnet motor.
[First embodiment]
First, the configuration and structure of a rotating electrical machine according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is a longitudinal sectional view showing a rotating electrical machine according to a first embodiment of the invention. FIG. 2 is an enlarged cross-sectional view showing a state in which a part of the stator of the rotary electric machine according to the first embodiment of the present invention shown in FIG. 1 is omitted. 3 is a perspective view showing a fitting structure (connection structure) of segment conductors in the stator winding of the rotating electric machine according to the first embodiment of the present invention shown in FIG. 2. FIG.

In FIG. 1, a rotating electrical machine 1 includes a housing 2 that constitutes the outer skin of the rotating electrical machine 1, a rotor 4 that is rotatably supported by the housing 2 via bearings 3, and held in the housing 2, A cylindrical stator 5 is arranged on the outer peripheral side of the rotor 4 with a gap therebetween. The rotating electrical machine 1 is used, for example, in a vehicle.

The housing 2 includes, for example, a tubular frame 21, a first bracket 22 attached to one axial side (the right side in FIG. 1) of the frame 21 and closing an opening on one side of the frame 21, and the frame. 21 and a second bracket 23 that is attached to the other side of the frame 21 in the axial direction (the left side in FIG. 1) and closes the opening on the other side of the frame 21 . The frame 21 is formed into a tubular shape by, for example, cutting a ferrous material such as carbon steel, casting cast steel or an aluminum alloy, or press working. A stepped surface 21 a is provided on the inner peripheral surface of the frame 21 as a reference surface for the axial position of the rotating electric machine 1 . Bearings 3 are provided at the center portions of the first bracket 22 and the second bracket 23, respectively.

The rotor 4 includes, for example, a shaft 41 that can be connected to an external device, a tubular rotor core 42 that is fixed to the outer peripheral side of the shaft 41 and rotates integrally with the shaft 41 , and a It includes embedded permanent magnets 43 and non-magnetic annular plates 44 attached to both axial ends of the rotor core 42 and permanent magnets 43 . Both sides of the shaft 41 are rotatably supported by the first bracket 22 and the second bracket 23 via the bearings 3 . The permanent magnets 43 function as field poles of the rotor 4 .

The stator 5 is fixed to the inner peripheral side of the frame 21 by a method such as shrink fitting. The stator 5 includes a cylindrical stator core 51 held inside the frame 21 and having the rotor 4 arranged on the inner peripheral side thereof, and a stator winding 52 wound around the stator core 51 . I have.

As shown in FIG. 2, the stator core 51 is formed by laminating a plurality of thin annular electromagnetic steel plates 51a. A plurality of slots 54 extending in the axial direction of the stator core 51 are formed at intervals in the circumferential direction on the inner peripheral side of the stator core 51 . In other words, a plurality of teeth 55 protruding radially inward and extending in the axial direction are provided on the inner peripheral side of the stator core 51 at intervals in the circumferential direction. formed.

The stator windings 52 are, as shown in FIGS. A segment conductor 57 and a plurality of second segment conductors 58 inserted through a plurality of slots 54 from the other axial direction side (left side in FIGS. 1 and 2) of the stator core 51 are connected in each slot 54. It is formed by A first bracket 22 is arranged at a position axially separated from the axial ends of the plurality of first segment conductors 57 . A second bracket 23 is arranged at a position axially separated from the axial ends of the plurality of second segment conductors 58 . The stator winding 52 is, for example, wound in a plurality of slots 54 by distributed winding.

For example, as shown in FIG. 2, each slot 54 accommodates six first segment conductors 57 and six second segment conductors 58 (stator windings 52) that are connected in a row in the radial direction ( In FIG. 2, three are shown, but three are omitted). Between each stator winding 52 (connected first segment conductor 57 and second segment conductor 58) housed in slot 54 and between each stator winding 52 and the inner wall of slot 54 An insulator 70 is arranged in the . Specifically, each stator winding 52 in the slot 54 is covered with a cylindrical insulator 70 to ensure insulation.

The first segment conductor 57 is formed in a substantially U-shape, and includes a pair of linear first coil side portions 61 accommodated in two different slots 54 and one side of the stator core 51 in the axial direction. It has a curved first coil end portion 62 that protrudes outward and connects the ends of the pair of first coil side portions 61 . A first fitting concave portion 61a and a first fitting protrusion 61b (see FIG. 3) are provided at the tip portions of the pair of first coil side portions 61, respectively. The first coil end portion 62 has a first top portion 62a at an intermediate portion thereof, which serves as an end portion of the stator winding 52 on one side in the axial direction. The first segment conductor 57 is, for example, a rectangular conductor having a rectangular cross section.

The second segment conductor 58 is formed in a substantially U-shape, and extends from a pair of linear second coil side portions 64 accommodated in two different slots 54 and from the other side of the stator core 51 in the axial direction. It has a curved second coil end portion 65 that protrudes outward and connects the ends of the pair of second coil side portions 64 . A second fitting recess 64a (see FIG. 3) that fits into the first fitting protrusion 61b (see FIG. 3) of the first segment conductor 57 and A second fitting projection 64b that fits into the first fitting recess 61a of the first segment conductor 57 is provided. The second coil end portion 65 has a second top portion 65a at an intermediate portion, which is the end portion of the stator winding 52 on the other side in the axial direction. The second segment conductor 58 is, for example, a rectangular conductor having a rectangular cross section. The second segment conductor 58 has the same shape as the first segment conductor 57, for example.

The first fitting recess 61a and the first fitting projection 61b of the first segment conductor 57 are formed by punching or the like, and the processed surface thereof enables electrical connection with the second segment conductor 58. It forms a connection surface that connects Similarly, the second fitting recess 64a and the second fitting protrusion 64b of the second segment conductor 58 are formed by punching or the like, and the processed surface thereof is electrically connected to the first segment conductor 57. It forms a connection surface that allows The connection surfaces of the first fitting recess 61a and the first fitting projection 61b of the first segment conductor 57, and the connection surfaces of the second fitting recess 64a and the second fitting projection 64b of the second segment conductor 58 are For example, as shown in FIG. 2, the first segment conductors 57 and the second segment conductors 58 are formed so as to be substantially orthogonal to the radial direction of the stator core 51 when accommodated in the slots 54. . As shown in FIGS. 2 and 3, the first fitting recess 61a and the second fitting recess 64a have a substantially rectangular recessed shape in vertical cross-section perpendicular to the connecting surface. The first fitting protrusion 61b and the second fitting protrusion 64b have a substantially rectangular vertical cross-sectional shape orthogonal to the connection surface according to the recessed shapes of the second fitting recess 64a and the first fitting recess 61a. is formed in

The plurality of first segment conductors 57 and the plurality of second segment conductors 58 are arranged at the distal ends of the first coil side portions 61 (first fitting recesses 61a or first fitting recesses 61a or first fitting The stator winding 52 is formed by fitting and connecting the projection 61b) and the tip of the second coil side portion 64 (the second fitting projection 64b or the second fitting recess 64a). ing. That is, the stator winding 52 includes a plurality of first segment conductors 57 housed in the slots 54 in a state in which a portion protrudes to one side of the stator core 51 in the axial direction, and a portion of the stator core 51 axially extending from the stator core 51 . A plurality of second segment conductors 58 that protrude in the other direction and are accommodated in the slot 54 are connected to each other by fitting their distal end portions facing each other in the axial direction within the slot 54 . The stator winding 52 has a plurality of fitting portions (connecting portions) of the first and second segment conductors 57 and 58 in the same slot 54 and in a plurality of slots 54 arranged in the circumferential direction. are doing.

Further, as shown in FIG. 1 , a movement restricting member 11 is arranged between the first coil ends 62 (axial ends) of the plurality of first segment conductors 57 and the first bracket 22 . there is The movement restricting member 11 is fixed by being sandwiched between the stepped surface 21a of the frame 21 and the outer peripheral portion of the end surface of the stator core 51 on one side in the axial direction. That is, the movement restricting member 11 is fixed to the frame 21 while being in contact with the step surface 21a, which is the reference surface in the axial direction of the rotating electric machine 1, so that the movement restricting member 11 is positioned in the axial direction. The movement restricting member 11 is a member with which axial ends (first apex portions 62a shown in FIG. 2) of the plurality of first coil end portions 62 abut, and the plurality of first coil end portions 62 abut in the axial direction. It has a contact surface 11a. The movement restricting member 11 has a function of restricting axial movement of the plurality of first segment conductors 57 and positioning them in the axial direction. The movement restricting member 11 is formed in an annular shape from a material having electrical insulation and heat resistance, such as resin or ceramic, so that the plurality of first segment conductors 57 are not electrically short-circuited via the movement restricting member 11. is configured as

An insulating member 12 and an elastic member 13 are provided between the second coil ends 65 (axial ends) of the plurality of second segment conductors 58 and the second bracket 23 . The rotary electric machine 1 is configured such that a pressing force that presses the plurality of second segment conductors 58 toward one side in the axial direction is transmitted through the elastic member 13 and the insulating member 12 in order.

The insulating member 12 is arranged so as to abut on axial ends (second top portions 65 a ) of the plurality of second coil end portions 65 . The insulating member 12 is, for example, a member formed in an annular shape, and has a first contact surface 12a that contacts the plurality of second coil end portions 65 on one side in the axial direction, and a distal end of an elastic member on the other side in the axial direction. It has a second abutment surface 12b on which the portion abuts. The insulating member 12 is made of a material having electrical insulation and heat resistance, such as resin or ceramic, and is configured so that the plurality of second segment conductors 58 are not electrically short-circuited through the insulating member 12. The elastic member 13 is arranged so as to contact the second contact surface 12 b of the insulating member 12 . The elastic member 13 may be any member having an elastic property, and may be composed of, for example, a member made of rubber, a spring made of metal, or the like. The elastic member 13 is formed, for example, in an annular shape, and both sides on the insulating member 12 side and the second bracket 23 side are planar.

A pressing force that presses the stator winding 52 (second segment conductor 58) toward one axial side is applied to the elastic member 13 by, for example, a pressing bolt 14 as a pressure member. The pressing bolt 14 is inserted through a bolt hole 23a that axially penetrates the second bracket 23, and the tip thereof abuts against the elastic member 13 and presses it toward one side in the axial direction. The pressing bolt 14 can adjust the pressing force (pushing amount) against the elastic member 13 according to the amount of insertion (movement amount in the axial direction) into the bolt hole 23a. A plurality of pressing bolts 14 are arranged at intervals in the circumferential direction. By individually changing the amount of insertion of the plurality of pressing bolts 14 arranged in the circumferential direction, it is possible to change the distribution of the pressing force (push amount) in the circumferential direction.

Next, functions and effects of the rotating electrical machine according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. FIG. 4 is an explanatory diagram showing an example of variations in the fitting state of a plurality of fitting portions of a plurality of segment conductors that constitute the stator winding of a rotating electric machine.

As described above, in the stator winding 52 of the present embodiment, the pair of first coil side portions 61 of the plurality of first segment conductors 57 are arranged on one axial side of the stator core 51 as shown in the figure. are inserted into different slots 54, and a pair of second coil side portions 64 of a plurality of second segment conductors 58 are inserted into different slots 54 from the other side of the stator core 51 in the axial direction. The tip of the first coil side portion 61 (the first fitting recess 61a or the first fitting protrusion 61b) and the tip of the second coil side portion 64 (the second fitting protrusion 64b or the second fitting protrusion 64b) face each other in the direction. It is formed by fitting the joint recess 64a). In this stator winding 52 , a plurality of fitting portions between the first segment conductors 57 and the second segment conductors 58 are present in the slots 54 .

In the stator winding 52 having such a configuration, a plurality of fitting portions (first fitting concave portion 61a and second fitting projection portion 64b, or The first fitting protrusion 61b and the second fitting recess 64a) have variations in the dimensions such as the axial length within the tolerance range from the standard dimension due to the manufacturing process. Therefore, it is difficult to evenly fit all of the plurality of fitting portions having different dimensions, as shown in FIG. 4, and the fitting state tends to be uneven. In this case, some of the plurality of fitting portions may be in an insufficiently fitted state, increasing contact resistance.

Further, when a plurality of fitting portions are in an uneven fitting state as shown in FIG. 4, the first bracket 22 and the second bracket 23 shown in FIG. If an attempt is made to eliminate the insufficient mating state by uniformly pushing the segment conductors 57 and the second segment conductors 58 from both sides in the axial direction, some of the plurality of mating portions are forcibly pushed. There is a concern that it will be deformed in a state where it is bent.

Therefore, in the rotary electric machine 1 according to the present embodiment, as shown in FIG. 1, the movement restricting member 11 is arranged closer to the first bracket 22 than the first coil end portion 62 of the first segment conductor 57, and the frame is mounted on the frame. 21, and the elastic member 13 presses the plurality of second segment conductors 58 toward one side in the axial direction through the insulating member 12 by the plurality of pressing bolts 14 to push them into the first segment conductor 57 side. is configured as

By pushing the plurality of second segment conductors 58 toward the first segment conductor 57 , the first coil end portions 62 of the plurality of first segment conductors 57 come into contact with the contact surface 11 a of the movement restricting member 11 . movement of each first segment conductor 57 in the axial direction is restricted. Therefore, the first segment conductors 57 are positioned in the axial direction without slipping out of the slots 54 of the stator core 51 . That is, the first fitting recesses 61a and the first fitting protrusions 61b (see FIG. 2 for both) of the plurality of first segment conductors 57 are arranged in the slots 54 at predetermined positions.

At this time, a plurality of fitting portions of the segment conductors 57 and 58 (the first fitting recess 61a and the second fitting projection 64b, and the first fitting projection 61b and the second fitting recess 64a) are caused by tolerances. Even if there is variation in the length in the axial direction (for example, see FIG. 4), the pressing force to press one side in the axial direction is transmitted to the plurality of second segment conductors 58 via the elastic member 13. The amount of pushing in the axial direction of each fitting portion is adjusted by the elasticity of the elastic member 13 according to the variation in the axial length of the fitting portion. Therefore, all of the plurality of fitting portions of both segment conductors 57 and 58 are not pushed in beyond a predetermined fitting amount, and are in a good fitting state.

In addition, by sandwiching the plurality of first segment conductors 57 and the plurality of second segment conductors 58 between the movement restricting member 11 and the elastic member 13, the axial pressing force is always applied to both the segment conductors 57 and 58. Since it acts, the force for fixing the stator winding 52 can be secured. Therefore, even if an external or internal force such as heat or vibration acts on the stator winding 52 alone or the entire rotary electric machine 1, the stator of the first segment conductor 57 and the second segment conductor 58 will not operate. It is possible to prevent the core 51 from falling out of the slot 54 and the disconnection of the segment conductors 57 and 58 from being fitted, thereby improving the reliability of the rotating electric machine 1 .

The rotary electric machine 1 according to the first embodiment of the present invention described above includes a stator core 51 in which a plurality of slots 54 extending in the axial direction are formed at intervals in the circumferential direction, and a part of the stator core A plurality of first segment conductors 57 accommodated in slots 54 while protruding to one side in the axial direction of stator core 51 and a plurality of segment conductors 57 accommodated in slots 54 while partially protruding to the other side in the axial direction of stator core 51 . The stator winding 52 formed by connecting the second segment conductor 58 of the slot 54 by fitting the tip portions 61a, 61b, 64a, 64b facing each other in the axial direction, and the stator core 51 inside, and a first bracket arranged axially apart from the axial ends of the plurality of first segment conductors 57 and attached to one side of the frame 21 in the axial direction. 22, a second bracket 23 arranged axially apart from the axial ends of the plurality of second segment conductors 58 and attached to the other axial side of the frame 21, and a plurality of first segment conductors. A movement restricting member 11 having electrical insulation disposed so as to abut axial ends of the second segment conductors 57, and an insulating member 12 disposed so as to abut axial ends of the plurality of second segment conductors 58. and an elastic member 13 disposed between the insulating member 12 and the second bracket 23, and a pressing force pressing the plurality of second segment conductors 58 toward one side in the axial direction causes the elastic member 13 and the insulating member 12 to configured to be transmitted through

With this configuration, the elastic member 13 presses the plurality of second segment conductors 58 toward one side in the axial direction through the insulating member 12 and pushes them toward the plurality of first segment conductors 57 , and the movement restricting member 11 moves toward the plurality of first segment conductors 57 . By restricting the movement of the first segment conductor 57 in the axial direction, the first segment conductor 57 is prevented from slipping out of the slot 54 of the stator core 51, and the second segment conductor 58 and the first segment conductor are separated. It is possible to reduce non-uniformity of the fitting state without forcibly pushing the plurality of fitting portions of 57 . That is, while fixing the stator winding 52 formed by connecting a plurality of first segment conductors 57 and second segment conductors 58 in the axial direction, Adverse effects due to tolerances in the fitted state can be reduced.

Further, in the rotary electric machine 1 according to the present embodiment, the frame 21 has the stepped surface 21a on the inner peripheral surface thereof, which serves as a reference surface in the axial direction, and the movement restricting member 11 is in contact with the stepped surface 21a. It is fixed to the frame 21. With this configuration, the movement restricting member 11 functions as a reference for positioning the first segment conductor 57 in the axial direction. Accordingly, the mating portion of the first segment conductor 57 is positioned within the slot 54, further reducing non-uniformity in mating conditions between the first and second segment conductors 57, 58. be able to.

Further, in the rotary electric machine 1 according to the present embodiment, the pressing force transmitted to the plurality of second segment conductors 58 is applied to at least one pressing member positioned between the second bracket 23 and the elastic member 13. Added by 14. According to this configuration, the two discs sandwiching the stator winding from both sides in the axial direction are fastened by bolts penetrating the outer periphery of the stator core, thereby applying an axial pressing force to the stator winding. As compared with the rotating electric machine of 1, it is possible to apply an axial pressing force to the stator windings without increasing the outer diameter of the stator core 51 . Further, the magnitude of the pressing force (push amount) against the elastic member 13 can be adjusted by adjusting the position of the pressing member 14 in the axial direction.

Further, in the rotary electric machine 1 according to the present embodiment, a plurality of pressure members 14 are arranged at intervals in the circumferential direction. According to this configuration, by independently adjusting the axial position of each of the plurality of pressure members 14, the pressing force (push amount) on the plurality of second segment conductors 58 arranged in the circumferential direction can be adjusted. ) can be adjusted in the circumferential direction. Therefore, it is possible to further reduce non-uniformity in the pushed state (fitted state) of the plurality of fitting portions of both the segment conductors 57 and 58 arranged in the circumferential direction.

Further, in the rotary electric machine 1 according to the present embodiment, the movement restricting member 11 is fixed by being sandwiched between the step surface 21a of the frame 21 and the end surface of the stator core 51 on one side in the axial direction. This configuration eliminates the need for a fixing member for fixing the movement restricting member 11 to the frame 21, thereby reducing the number of parts.

[Second embodiment]
Next, a rotating electrical machine according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a longitudinal sectional view showing a rotating electric machine according to a second embodiment of the invention. In FIG. 5, parts having the same reference numerals as those shown in FIGS. 1 to 4 are the same parts, and detailed description thereof will be omitted.

A rotating electrical machine 1A according to a second embodiment of the present invention shown in FIG. It does not abut against the second coil end portions 65 of the second segment conductors 58, but is integrated with the second coil end portions 65 of the plurality of second segment conductors 58 by molding. In the insulating member 12A integrated with the plurality of second segment conductors 58, the elastic member 13 contacts the second contact surface 12b facing the second bracket 23 side. For example, before inserting the second segment conductors 58 into the slots 54 of the stator core 51 , the insulating member 12</b>A is provided at the axial ends of the second coil ends 65 of the plurality of second segment conductors 58 . It is formed by molding an insulating material such as resin so as to cover the two top portions 65a (see FIG. 2). In this configuration, the relative positions of the plurality of second segment conductors 58 with respect to the insulating member 12A are fixed.

In the present embodiment, unlike the first embodiment in which the plurality of second segment conductors 58 are individually inserted into the slots 54 of the stator core 51, by adjusting the position of the insulating member 12A, the insulation All of the plurality of second segment conductors 58 integrated with member 12A are inserted into slots 54 at one time.

Also in this embodiment, as in the first embodiment, the plurality of second segment conductors 58 are connected by the plurality of pressing bolts 14 as pressure members via the elastic member 13 and the insulating member 12A in order. Pushed to one side in the axial direction. Therefore, due to the elasticity of the elastic member 13, all of the plurality of fitting portions of both segment conductors 57 and 58 are not pushed in beyond a predetermined fitting amount, and are in a good fitting state. By adjusting the amount of insertion (amount of movement in the axial direction) of a plurality of pressing bolts 14 in the circumferential direction, a plurality of fitting portions of both segment conductors 57 and 58 arranged in the circumferential direction can be pushed in (fitted state). It is possible to reduce the non-uniformity of

In the rotating electric machine 1A according to the second embodiment of the present invention described above, as in the first embodiment, the first segment conductor 57 and the second segment conductor 58 are formed by connecting a plurality of the first segment conductors 57 and the second segment conductors 58. While fixing the stator winding 52 in the axial direction, it is possible to reduce adverse effects due to tolerances in the mating state between the first and second segment conductors 57 and 58 .

Furthermore, the rotating electric machine 1A according to the present embodiment is configured such that the insulating member 12A is integrated with the plurality of second segment conductors 58 by molding. According to this configuration, deformation of the second coil end portion 65 of the second segment conductor 58 can be suppressed by the insulating member 12A. In addition, since the insulating member 12A integrally supports the plurality of second segment conductors 58, all of the plurality of second segment conductors 58 are integrally connected to the stator core 51 using the insulating member 12A. It can be inserted into slot 54 . Therefore, the insertability of the second segment conductor 58 into the slot 54 is improved as compared with the configuration of the first embodiment.

[Third Embodiment]
Next, a rotating electric machine according to a third embodiment of the present invention will be explained using FIG. FIG. 6 is a perspective view showing an insulating member that constitutes a rotating electric machine according to a third embodiment of the present invention. In FIG. 6, parts having the same reference numerals as those shown in FIGS. 1 to 5 are the same parts, and detailed description thereof will be omitted.

A rotating electrical machine 1B according to the third embodiment of the present invention shown in FIG. 6 differs from the rotating electrical machine 1 (see FIG. 1) according to the first embodiment in that the second segment conductors 58 A plurality of recessed portions 12d having a shape corresponding to the contour shape of the second top portion 65a (see FIG. 2) of the second coil end portion 65 of the second segment conductor 58 on the surface (first contact surface 12a) that contacts the are formed at a plurality of positions corresponding to the arrangement positions of the second top portions 65a of the second coil end portions 65 of .

By the way, in the first embodiment, the plurality of second segment conductors are pushed into the slots 54 (see FIG. 2) before the insulating member 12 is brought into contact with the plurality of second segment conductors 58. 58 of the plurality of second segment conductors 58 in the slots 54 of the plurality of second segment conductors 58 due to gaps between the plurality of second segment conductors 58 in the same slot 54, gaps between each of the second segment conductors 58 and the inner wall of the slot 54, and the like. The arrangement positions (positions in the radial direction, the circumferential direction, etc.) inside may deviate greatly from the design reference positions. In this case, the contact position of the second segment conductor 58 with respect to the insulating member 12 deviates from the designed reference position. Variation in the arrangement positions of the fitting portions (the second fitting projections 64b and the second fitting recesses 64a shown in FIG. 2) of the plurality of second segment conductors 58 increases. If the arrangement positions of the plurality of fitting portions of the second segment conductors 58 vary greatly, the pushing amount of the second segment conductors 58 by the pressing member (pressing bolt) 14 must be increased accordingly. Uneven fitting states of the multiple fitting portions 57 and 58 cannot be eliminated. However, if the pushing amount is increased, the second segment conductors 58 may be pressed more than necessary depending on the fitting state of the fitting portions, which may cause deformation of the fitting portions.

In contrast, in the third embodiment of the present invention, when the insulating member 12B is brought into contact with the plurality of second segment conductors 58, the plurality of second coil ends 65 of the second segment conductors 58 are The second tops 65a move on the surface so as to engage with the recesses 12d formed in the first contact surface 12a of the insulating member 12B, and the plurality of second segment conductors 58 move relative to the insulating member 12B. is corrected so that the intended placement position is closer to the design reference position. That is, each recessed portion 12d of the insulating member 12B has a positioning function with respect to each second segment conductor 58. As shown in FIG. Since the arrangement positions of the plurality of fitting portions of the second segment conductors 58 in the slots 54 are corrected in accordance with the correction of the arrangement positions of the plurality of second segment conductors 58 with respect to the insulating member 12B, the plurality of fitting positions are corrected. Only the influence of dimensional variations due to tolerances remains in the mating portion. Therefore, the possibility of pressing the second segment conductor 58 more than necessary is reduced.

According to the third embodiment of the present invention described above, the stator winding formed by connecting a plurality of first segment conductors 57 and second segment conductors 58 is similar to the first embodiment. While the wire 52 is axially fixed, adverse effects due to tolerances in the fit between the first and second segment conductors 57, 58 can be reduced.

In the rotary electric machine 1B according to the present embodiment, the surface of the insulating member 12B that contacts the axial end of the second segment conductor 58 corresponds to the contour shape of the axial end of the second segment conductor 58. It is configured to have a plurality of recessed portions 12d having a shape that With this configuration, when the insulating member 12B is brought into contact with the plurality of second segment conductors 58, the axial ends of the second segment conductors 58 are engaged with the recessed portions 12d. 58 is positioned relative to insulating member 12B. Therefore, variations in the arrangement positions of the fitting portions of the second segment conductors 58 are suppressed, so that the uneven fitting state of the fitting portions of both the segment conductors 57 and 58 can be further reduced.

[Fourth embodiment]
Next, a rotating electrical machine according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a perspective view showing a movement restricting member that constitutes a rotary electric machine according to a fourth embodiment of the present invention. In FIG. 7, parts having the same reference numerals as those shown in FIGS. 1 to 6 are the same parts, and detailed description thereof will be omitted.

A rotary electric machine 1C according to a fourth embodiment of the present invention shown in FIG. 7 differs from the rotary electric machine 1 (see FIG. 1) according to the first embodiment in that the plurality of first A recess portion 11b having a shape corresponding to the contour shape of the first top portion 62a (see FIG. 2) of the first coil end portion 62 of the first segment conductor 57 is formed on the surface (contact surface 11a) that contacts the segment conductor 57. are formed at a plurality of positions corresponding to the arrangement positions of the first top portions 62 a of the plurality of first coil end portions 62 .

By the way, in the first embodiment, the plurality of first segment conductors 57 pushed into the slots 54 (see FIG. 2) before coming into contact with the movement restricting member 11 are arranged in the same slot 54. Due to the gaps between the plurality of first segment conductors 57 and the gaps between each of the first segment conductors 57 and the inner wall of the slot 54, the arrangement position (radial direction, position in the circumferential direction) may deviate greatly from the design reference position. In this case, the contact position of the first segment conductors 57 with respect to the movement restricting member 11 deviates from the designed reference position, so that the fitting portions of the plurality of first segment conductors 57 (first shown in FIGS. 2 and 3) The variation in the arrangement positions of the fitting recess 61a and the first fitting protrusion 61b) is further increased. If the arrangement positions of the plurality of fitting portions of the first segment conductor 57 vary greatly, uneven fitting of the plurality of fitting portions of both the segment conductors 57 and 58 occurs as described in the third embodiment. The push amount to clear the state increases. Therefore, there is a concern that the second segment conductor 58 is pressed more than necessary.

In contrast, in the fourth embodiment of the present invention, when the plurality of first segment conductors 57 come into contact with the movement restricting member 11C, the plurality of first coil end portions 62 of the first segment conductors 57 The first tops 62a move on the surface so as to engage with the recesses 11b formed in the contact surface 11a of the movement restricting member 11C, and the plurality of first segment conductors 57 move relative to the movement restricting member 11C. is corrected so that the intended placement position is closer to the design reference position. That is, each recessed portion 11b of the movement restricting member 11C has a positioning function with respect to each first segment conductor 57. As shown in FIG. Since the arrangement positions of the plurality of fitting portions of the first segment conductors 57 within the slots 54 are corrected in accordance with the correction of the arrangement positions of the plurality of first segment conductors 57 with respect to the movement restricting member 11C, the dimension due to the tolerance is corrected. only the effect of the variation in

According to the fourth embodiment of the present invention described above, the stator winding formed by connecting a plurality of first segment conductors 57 and second segment conductors 58 is similar to the first embodiment. While the wire 52 is axially fixed, adverse effects due to tolerances in the fit between the first and second segment conductors 57, 58 can be reduced. Further, in the rotary electric machine 1C according to the present embodiment, the surface of the movement restricting member 11C with which the plurality of first segment conductors 57 abut corresponds to the contour shape of the axial ends of the plurality of first segment conductors 57. It is configured to have a plurality of recessed portions 11b each having a curved shape. With this configuration, when the plurality of first segment conductors 57 come into contact with the movement restricting member 11C, the plurality of axial ends of the first segment conductors 57 engage with the recesses 11b. segment conductor 57 is positioned with respect to the movement restricting member 11C. Therefore, variations in the arrangement positions of the plurality of fitting portions of the first segment conductors 57 are suppressed, so that the non-uniform fitting state of the fitting portions of the segment conductors 57 and 58 can be further reduced.

[Fifth embodiment]
Next, a rotating electrical machine according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view showing a pressing member that constitutes a rotating electric machine according to a fifth embodiment of the present invention.

A rotary electric machine 1D according to the fifth embodiment of the present invention shown in FIG. 8 differs from the rotary electric machine 1 (see FIG. 1) according to the first embodiment in that the pressure member is integrated with the elastic member. It was constructed A ball plunger 80, for example, is an example of a component in which the pressure member is integrated with the elastic member. The ball plunger 80 includes a threaded body 81 having an axially extending non-penetrating housing hole 81a, a coil spring 82 housed in the housing hole 81a of the threaded body 81, and one end exposed to the outside. and a ball 83 arranged in the housing hole 81a with the other end in contact with the tip of the coil spring 82. As shown in FIG. The ball plunger 80 accommodates therein a coil spring 82 functioning as an elastic member, and a ball 83 is axially movable within the accommodation hole 81a.

According to the fifth embodiment of the present invention described above, the stator winding formed by connecting a plurality of the first segment conductors 57 and the second segment conductors 58 is similar to the first embodiment. While the wire 52 is axially fixed, adverse effects due to tolerances in the fit between the first and second segment conductors 57, 58 can be reduced.

Further, in the rotary electric machine 1D according to the present embodiment, the pressing member 80 is configured as a single component integrated with the elastic member. With this configuration, the number of parts can be reduced. In addition, since the arrangement of the integrated elastic member is also completed by the arrangement of the pressure member 80, compared with the case where the pressure member and the elastic member 82 are separate parts, the part arrangement process can be reduced. . As a result, it is possible to reduce the man-hours and time for assembling the rotary electric machine 1D.

[Sixth embodiment]
Next, a rotating electric machine according to a sixth embodiment of the present invention will be explained using FIG. FIG. 9 is a perspective view showing an elastic member that constitutes a rotating electric machine according to a sixth embodiment of the present invention.

A rotary electric machine 1E according to the sixth embodiment of the present invention shown in FIG. 9 differs from the rotary electric machine 1 (see FIG. 1) according to the first embodiment in that the elastic member contacts the pressing member. The surface has an engaging portion that engages with the pressure member. Specifically, an engaging portion 85 that engages with the tip portion of the pressing bolt 14 (see FIG. 1) on the contact surface of the elastic member 13E with the pressing bolt 14 (see FIG. 1) corresponds to the arrangement position of the pressing bolt 14. A plurality of them are formed at intervals in the circumferential direction. The engaging portion 85 may be, for example, a recess or a through hole.

When the contact surface with the pressing bolt 14 is flat like the elastic member 13 (see FIG. 1) of the first embodiment, if the contact position and direction of the pressing bolt 14 with respect to the elastic member 13 are not accurate, the elastic member 13 may act on the second segment conductor 58 (see FIG. 1) in an inclined state with respect to the axial direction. In this case, it becomes difficult to push the second segment conductor 58 into the assumed reference position in the slot 54 (see FIG. 1).

On the other hand, in the present embodiment, the tip portion of the pressing bolt 14 as the pressure member is engaged with the concave portion as the engaging portion 85 of the elastic member 13E, thereby making contact with the elastic member 13E of the pressing bolt 14. It prevents misalignment of the part that That is, the pressing bolt 14 can be positioned with respect to the elastic member 13E, and the pressing bolt 14 can accurately press the elastic member 13E and the second segment conductor 58 in a direction parallel to the axial direction.

According to the sixth embodiment of the present invention described above, the stator winding formed by connecting a plurality of first segment conductors 57 and second segment conductors 58 is similar to the first embodiment. While the wire 52 is axially fixed, adverse effects due to tolerances in the fit between the first and second segment conductors 57, 58 can be reduced. Further, in the rotary electric machine 1E according to the present embodiment, the elastic member 13E has an engaging portion 85 that engages with the tip portion of the pressure member 14. As shown in FIG. According to this configuration, the pressure member 14 is not displaced from the elastic member 13E, so the elastic member 13E can accurately push the plurality of second segment conductors 58 in the axial direction. Therefore, variations in the arrangement positions of the plurality of fitting portions of the second segment conductors 58 are suppressed, so that the non-uniform fitting state of the fitting portions of the segment conductors 57 and 58 can be further reduced.

[Seventh embodiment]
Next, a rotating electrical machine according to a seventh embodiment of the present invention will be explained using FIG. FIG. 10 is a perspective view showing elastic members forming a rotating electric machine according to a seventh embodiment of the present invention.

A rotary electric machine 1F according to a seventh embodiment of the present invention shown in FIG. That is. Specifically, the elastic member 13</b>F has a plurality of fastening portions 86 that can be fastened with the pressing bolts 14 as pressure members, and are provided at intervals in the circumferential direction corresponding to the arrangement positions of the pressing bolts 14 . Examples of the fastening portion 86 include a helisert and an irisert.

According to the seventh embodiment of the present invention described above, the stator winding formed by connecting a plurality of first segment conductors 57 and second segment conductors 58 is similar to the first embodiment. While the wire 52 is axially fixed, adverse effects due to tolerances in the fit between the first and second segment conductors 57, 58 can be reduced. Further, in the rotary electric machine 1F according to the present embodiment, the pressing member 14 is configured to be fastened to the elastic member 13F. According to this configuration, the pressurizing member 14 is positioned with respect to the elastic member 13F by fastening, so that the elastic member 13F can accurately push the plurality of second segment conductors 58 in the axial direction. Therefore, variations in the arrangement positions of the plurality of fitting portions of the second segment conductors 58 are suppressed, so that the non-uniform fitting state of the fitting portions of the segment conductors 57 and 58 can be further reduced.

[Eighth embodiment]
Next, a rotating electrical machine according to an eighth embodiment of the present invention will be described with reference to FIG. FIG. 11 is a longitudinal sectional view showing a rotating electrical machine according to an eighth embodiment of the invention. In FIG. 11, the first bracket is omitted. In FIG. 11, parts having the same reference numerals as those shown in FIGS. 1 to 10 are the same parts, and detailed description thereof will be omitted.

A rotary electric machine 1G according to an eighth embodiment of the present invention shown in FIG. 11 differs from the rotary electric machine 1 (see FIG. 1) according to the first embodiment in that a movement restricting member 11G is provided with a frame 21G. It is fixed to the frame 21G by fastening with a fastening member 89 passing through the frame 21G, instead of being fixed by being sandwiched by the stator core 51 . Specifically, a plurality of through-holes 88 penetrating in the radial direction are formed at intervals in the circumferential direction in a portion of the frame 21G corresponding to the arrangement of the movement restricting member 11G. The annular movement restricting member 11G is provided with a plurality of screw holes 11c as fastening portions that can be fastened to fixing bolts as the fastening members 89 at intervals in the circumferential direction according to the arrangement positions of the through holes 88 of the frame 21G. ing. The movement restricting member 11G is fixed to the frame 21G by screwing a fixing bolt 89 inserted through a through hole 88 of the frame 21G into the screw hole 11c.

According to the eighth embodiment of the present invention described above, the stator winding formed by connecting a plurality of first segment conductors 57 and second segment conductors 58 is similar to the first embodiment. While the wire 52 is axially fixed, adverse effects due to tolerances in the fit between the first and second segment conductors 57, 58 can be reduced. [Other embodiments]
In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the described configurations. A part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is also possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

For example, in the first to eighth embodiments described above, an example in which the rotary electric machine of the present invention is applied to a permanent magnet electric motor in which the rotor 4 has the permanent magnet 43 has been described. However, the present invention can also be applied to a synchronous motor in which the rotor has a field winding, an induction motor in which the rotor has squirrel cage conductors, a reluctance motor in which the rotor consists only of a rotor core, and the like. be. That is, when applying the rotary electric machine of the present invention, there is no restriction on the components of the rotor for generating the magnetic field and the shape thereof.

Further, in the above-described embodiment, an example in which six connected first segment conductors 57 and second segment conductors 58 (stator windings 52) are accommodated in each slot 54 is shown. However, any number of stator windings 52 that can be accommodated within each slot 54 (eg, 2, 4, 8, etc.) can be placed.

Further, in the embodiment described above, an example is shown in which the plurality of stator windings 52 accommodated in the respective slots 54 are covered with the cylindrical insulators 70 . However, if the insulation of the stator windings 52 can be ensured, it is not necessary to cover each stator winding 52 with the insulator 70, and the shape and arrangement of the insulators are not particularly limited. Also, the insulator may be a bobbin-shaped one made of insulating paper, resin, or the like, and the material and type thereof are not particularly limited. Also, if the stator windings 52 themselves have a dielectric strength, there is no need to place insulators in the slots 54 .

In the above-described embodiment, the first fitting recess 61a, the first fitting protrusion 61b, and the second fitting recess 64a, which are the fitting portions of the first segment conductor 57 and the second segment conductor 58, are fitted. , the connection surface of the second fitting protrusion 64b is formed so as to be substantially orthogonal to the radial direction of the stator core 51 within the slot 54. As shown in FIG. However, the connecting surfaces of the first fitting recess 61a, the first fitting protrusion 61b, the second fitting recess 64a, and the second fitting protrusion 64b may be formed so as to be perpendicular to the circumferential direction within the slot 54. It is possible.

Further, in the above-described embodiment, the concave shape of the vertical cross section orthogonal to the connection surface of the first fitting recess 61a of the first segment conductor 57 and the second fitting recess 64a of the second segment conductor 58 is approximately It is formed in a rectangular shape, and the shape of the vertical cross section perpendicular to the connection surfaces of the first fitting protrusion 61b of the first segment conductor 57 and the second fitting protrusion 64b of the second segment conductor 58 is substantially rectangular. An example formed in However, the first fitting recess and the second fitting projection, and the first fitting projection and the second fitting recess can be formed in any shape that allows fitting. For example, the recessed shape of the vertical cross section perpendicular to the connecting surface of the first fitting recess and the second fitting recess is formed in a shape such as a triangle, a semicircle, or a semiellipse, and the first fitting protrusion and the second fitting recess are formed. It is possible to form the shape of the vertical cross-section perpendicular to the connecting surface of the mating protrusion in a triangular, semicircular, semi-elliptical shape according to the shapes of the first fitting recess and the second fitting recess. In addition, the first fitting recess and the second fitting recess are formed in cylindrical recesses, and the first fitting protrusion and the second fitting protrusion are shaped like the first fitting recess and the second fitting recess. It is also possible to form it in a cylindrical shape depending on the requirements.

Moreover, in the embodiment described above, an example of a configuration using a plurality of pressing bolts 14 as a pressure member was shown. However, the pressing member may be any member such as the pressing bolt 14 that can adjust the pressing amount (pressing force) against the elastic member 13 according to the mounting state, and there are no particular restrictions on its shape, material, and quantity.

Further, in the above-described embodiment, an example of a configuration in which the pressing member 14 applies a pressing force to press the second segment conductor 58 to one side in the axial direction has been described. However, it is also possible to apply a pressing force to push the second segment conductor 58 without using the pressure member 14 . For example, as shown in FIG. 12, the rotary electric machine 1H can be configured so that the second bracket 23H applies a pressing force that presses the second segment conductor 58 via the elastic member 13H. FIG. 12 is a longitudinal sectional view showing a rotating electric machine according to another embodiment of the invention.

Specifically, the elastic member 13H is formed so as to contact both the second bracket 23H and the insulating member 12 . Since the rotary electric machine 1H does not have the press bolt 14 (see FIG. 1) as a pressure member as in the first embodiment, the second bracket 23H does not have the press bolt 14 as in the first embodiment. It does not have a bolt hole 23a to be inserted.

When the second bracket 23H is fixed to the frame 21, the second bracket 23H contacts the elastic member 13H. As a result, the pressing force of the second bracket 23</b>H to the one side in the axial direction acts on the plurality of second segment conductors 58 via the elastic member 13</b>H and the insulating member 12 . Therefore, also in this embodiment, as in the first embodiment, the stator winding 52 formed by connecting a plurality of the first segment conductors 57 and the second segment conductors 58 is used as the axis. While fixing the orientation, adverse effects due to tolerances in the mating state between the first and second segment conductors 57, 58 can be reduced.

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H... rotary electric machine, 11, 11C, 11G... movement restricting member, 11b... recessed portion, 12, 12A, 12B... insulating member, 12d... recessed portion, 13, 13E, 13F, 13H... elastic member 14... pressing bolt (pressure member) 21, 21G... frame 21a... step surface 22... first bracket 23, 23H... second bracket 51... stator Core 52 Stator winding 54 Slot 57 First segment conductor 58 Second segment conductor 62 First coil end (axial end) 65 Second coil end (Axial end portion) 80 Ball plunger (pressure member and elastic member) 85 Engagement portion 88 Through hole 89 Fastening member

Claims (11)

a stator core in which a plurality of slots extending in the axial direction are formed at intervals in the circumferential direction;
a plurality of first segment conductors accommodated in the slots with a portion protruding toward one axial side of the stator core; and the slots with a portion protruding toward the other axial side of the stator core. a stator winding formed by connecting a plurality of second segment conductors accommodated in the slot by fitting the tip portions thereof facing each other in the axial direction;
a cylindrical frame that holds the stator core inside;
a first bracket axially spaced apart from the axial ends of the plurality of first segment conductors and attached to one axial side of the frame;
a second bracket axially spaced apart from the axial ends of the plurality of second segment conductors and attached to the other side of the frame in the axial direction;
a movement restricting member having electrical insulation disposed so as to abut against axial ends of the plurality of first segment conductors;
an insulating member arranged to abut against axial ends of the plurality of second segment conductors;
an elastic member disposed between the insulating member and the second bracket;
configured such that a pressing force pressing the plurality of second segment conductors toward one side in the axial direction is transmitted via the elastic member and the insulating member;
The frame has a stepped surface on its inner peripheral surface that serves as a reference surface in the axial direction,
The rotary electric machine, wherein the movement restricting member is fixed to the frame while being in contact with the step surface. In the rotary electric machine according to claim 1 ,
The rotary electric machine, wherein the movement restricting member is fixed by being sandwiched between the step surface of the frame and the end surface of the stator core on one side in the axial direction. a stator core in which a plurality of slots extending in the axial direction are formed at intervals in the circumferential direction;
a plurality of first segment conductors accommodated in the slots with a portion protruding toward one axial side of the stator core; and the slots with a portion protruding toward the other axial side of the stator core. a stator winding formed by connecting a plurality of second segment conductors accommodated in the slot by fitting the tip portions thereof facing each other in the axial direction;
a cylindrical frame that holds the stator core inside;
a first bracket axially spaced apart from the axial ends of the plurality of first segment conductors and attached to one axial side of the frame;
a second bracket axially spaced apart from the axial ends of the plurality of second segment conductors and attached to the other side of the frame in the axial direction;
a movement restricting member having electrical insulation disposed so as to abut against axial ends of the plurality of first segment conductors;
an insulating member arranged to abut against axial ends of the plurality of second segment conductors;
an elastic member disposed between the insulating member and the second bracket;
configured such that a pressing force pressing the plurality of second segment conductors toward one side in the axial direction is transmitted via the elastic member and the insulating member;
The insulating member has a plurality of depressions having a shape corresponding to the contour shape of the axial ends of the plurality of second segment conductors on a surface that abuts on the axial ends of the plurality of second segment conductors. A rotary electric machine characterized by: a stator core in which a plurality of slots extending in the axial direction are formed at intervals in the circumferential direction;
a plurality of first segment conductors accommodated in the slots with a portion protruding toward one axial side of the stator core; and the slots with a portion protruding toward the other axial side of the stator core. a stator winding formed by connecting a plurality of second segment conductors accommodated in the slot by fitting the tip portions thereof facing each other in the axial direction;
a cylindrical frame that holds the stator core inside;
a first bracket axially spaced apart from the axial ends of the plurality of first segment conductors and attached to one axial side of the frame;
a second bracket axially spaced apart from the axial ends of the plurality of second segment conductors and attached to the other side of the frame in the axial direction;
a movement restricting member having electrical insulation disposed so as to abut against axial ends of the plurality of first segment conductors;
an insulating member arranged to abut against axial ends of the plurality of second segment conductors;
an elastic member disposed between the insulating member and the second bracket;
configured such that a pressing force pressing the plurality of second segment conductors toward one side in the axial direction is transmitted via the elastic member and the insulating member;
The movement restricting member has a plurality of depressions having a shape corresponding to the contour shape of the axial ends of the plurality of first segment conductors on the surface with which the plurality of first segment conductors abut. A rotary electric machine characterized by a stator core in which a plurality of slots extending in the axial direction are formed at intervals in the circumferential direction;
a plurality of first segment conductors accommodated in the slots with a portion protruding toward one axial side of the stator core; and the slots with a portion protruding toward the other axial side of the stator core. a stator winding formed by connecting a plurality of second segment conductors accommodated in the slot by fitting the tip portions thereof facing each other in the axial direction;
a cylindrical frame that holds the stator core inside;
a first bracket axially spaced apart from the axial ends of the plurality of first segment conductors and attached to one axial side of the frame;
a second bracket axially spaced apart from the axial ends of the plurality of second segment conductors and attached to the other side of the frame in the axial direction;
a movement restricting member having electrical insulation disposed so as to abut against axial ends of the plurality of first segment conductors;
an insulating member arranged to abut against axial ends of the plurality of second segment conductors;
an elastic member disposed between the insulating member and the second bracket;
configured such that a pressing force pressing the plurality of second segment conductors toward one side in the axial direction is transmitted via the elastic member and the insulating member;
The rotating electric machine, wherein the pressing force transmitted to the plurality of second segment conductors is applied by at least one pressing member positioned between the second bracket and the elastic member. In the rotary electric machine according to claim 5 ,
A rotary electric machine, wherein a plurality of pressure members are arranged at intervals in a circumferential direction. In the rotary electric machine according to claim 5 ,
The rotary electric machine, wherein the pressure member is configured by a single part integrated with the elastic member. In the rotary electric machine according to claim 5 ,
The rotating electric machine, wherein the elastic member has an engaging portion that engages with the tip portion of the pressing member. In the rotary electric machine according to claim 5 ,
A rotary electric machine, wherein the pressure member is fastened to the elastic member. a stator core in which a plurality of slots extending in the axial direction are formed at intervals in the circumferential direction;
a plurality of first segment conductors accommodated in the slots with a portion protruding toward one axial side of the stator core; and the slots with a portion protruding toward the other axial side of the stator core. a stator winding formed by connecting a plurality of second segment conductors accommodated in the slot by fitting the tip portions thereof facing each other in the axial direction;
a cylindrical frame that holds the stator core inside;
a first bracket axially spaced apart from the axial ends of the plurality of first segment conductors and attached to one axial side of the frame;
a second bracket axially spaced apart from the axial ends of the plurality of second segment conductors and attached to the other side of the frame in the axial direction;
a movement restricting member having electrical insulation disposed so as to abut against axial ends of the plurality of first segment conductors;
an insulating member arranged to abut against axial ends of the plurality of second segment conductors;
an elastic member disposed between the insulating member and the second bracket;
configured such that a pressing force pressing the plurality of second segment conductors toward one side in the axial direction is transmitted via the elastic member and the insulating member;
the frame has a through hole provided at a position corresponding to the arrangement of the movement restricting member;
The rotary electric machine, wherein the movement restricting member is fixed to the frame by fastening with a fastening member inserted through the through hole of the frame. In the rotating electrical machine according to any one of claims 1, 4, 5, and 10 ,
The rotating electrical machine, wherein the insulating member is integrated with the plurality of second segment conductors by molding.

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