Rotary motor

Abstract

This invention relates to a rotary electric motor. The rotary electric motor simplifies manufacturing processes and improves reliability. It comprises: a rotor; a stator formed into a ring by stacking multiple magnetic plates on the outer side of the rotor; a pair of stator pressing plates, also ring-shaped and disposed on both sides of the stator in the stacking direction; and a cast interface fixed to the outer peripheral surface of the stator, connecting the pair of stator pressing plates to each other and fixing the stator to a rotary electric motor mounting position, with continuous construction from the fixing surface towards the outer peripheral surface of the stator to the fixing surface towards the rotary electric motor mounting position.

Description

Technical Field

[0001] The present invention relates to a rotary electric motor. Background Technology

[0002] Generally, railway vehicles consist of a rotary motor mounted on a trolley located under the vehicle body. The rotational force of the rotary motor is transmitted to the wheels via a joint and a reduction gear, causing the wheels to rotate and move the vehicle. The rotary motor is fixed to the trolley by a mounting bracket.

[0003] The mounting section used to fix the rotary motor to the trolley needs to support the weight of the rotary motor relative to the trolley, thus requiring sufficient strength and a complex shape. Conventionally, the mounting section was constructed by welding multiple components together. That is, the mounting section was manufactured by welding multiple components together and then fixed to the stator of the rotary motor. This resulted in increased welding time and inspection time for the welding section, leading to a longer manufacturing time for the rotary motor. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a rotary motor that simplifies the manufacturing process and improves reliability.

[0005] The rotary electric motor of the embodiment includes: a rotor; a stator, wherein a plurality of magnetic plates are stacked on the outer side of the rotor to form a ring; a pair of stator pressing plates, which are ring-shaped and disposed on both sides of the stator in the stacking direction; and a cast interface, which is fixed to the outer peripheral surface of the stator to connect the pair of stator pressing plates to each other and to fix the stator to the rotary electric motor mounting position, and the structure is continuous from the fixing surface to the fixing surface to the rotary electric motor mounting position. Attached Figure Description

[0006] Figure 1 This is a schematic diagram illustrating the driving force transmission path of the rotary electric motor in this embodiment.

[0007] Figure 2 This is a cross-sectional view showing the upper part of the rotary electric motor in this embodiment.

[0008] Figure 3 It is a three-dimensional diagram showing the main parts of a rotating electric machine.

[0009] Figure 4 This is a schematic diagram showing the stator of a rotating electric machine.

[0010] Figure 5 This is a perspective view showing the upper mounting part of a rotary electric motor.

[0011] Figure 6This is a perspective view showing the lower mounting part of a rotary electric motor.

[0012] Figure 7 This is a 3D diagram showing the limit switch of a rotary electric motor.

[0013] Figure 8 This is a three-dimensional view showing the stator connection of a rotating electric machine.

[0014] Figure 9 This is the main view showing the installation status of the rotating electric machine.

[0015] Figure 10 This is a top view showing the installation status of a rotating electric machine.

[0016] Figure 11 This is a top view showing a modified example of the installation state of a rotating electric machine.

[0017] Figure 12 This is a cross-sectional view of the upper part of a modified example of a rotating electric machine. Detailed Implementation

[0018] [First Implementation]

[0019] <The Structure of Rotary Electrical Machines>

[0020] Figure 1 This is a schematic diagram illustrating the driving force transmission path for transmitting the driving force of the rotary electric motor of this embodiment to the wheels. In the following embodiments, the rotary electric motor will be applied to the drive system of a railway vehicle for explanation.

[0021] The drive unit 10 of the railway vehicle includes a rotary motor 11, a coupling 12, a reduction gear 13, an axle 14, and wheels 15.

[0022] The rotary motor 11 is an electric motor. The rotary motor 11 is fixed to the frame of the trolley (not shown). The rotary motor 11 has a drive shaft 16 capable of driving rotation. The drive shaft 16 is connected to a connecting shaft 17 via a coupling 12. The reduction gear 13 is fixed to the frame of the trolley. The reduction gear 13 is a gear mechanism with multiple gears. The reduction gear 13 is connected to the connecting shaft 17. The reduction gear 13 reduces the input driving rotational force. The axle 14 is rotatably supported on the frame of the trolley. Wheels 15 are fixed to each end of the axle 14 along its axial direction. The middle portion of the axle 14 along its axial direction is connected to the reduction gear 13.

[0023] Therefore, when the rotary motor 11 is driven, the drive shaft 16 is driven to rotate, and the driving rotational force is input to the reduction gear 13 via the drive shaft 16, coupling 12, and connecting shaft 17. The reduction gear 13 reduces the driving speed of the input rotary motor 11, thereby driving the axle 14 to rotate. As a result, the wheels 15 fixed to each end of the axle 14 rotate, and the railway vehicle becomes able to move.

[0024] <The Structure of Rotary Electrical Machines>

[0025] Figure 2 This is a cross-sectional view showing the internal structure of the rotary electric motor of this embodiment, which is cut off along the direction of the rotation axis.

[0026] In this embodiment, the rotary motor 11 has a frameless structure. The rotary motor 11 is a fully enclosed induction motor that is cooled only by external air without internal cooling air circulation.

[0027] The rotary electric motor 11 has a rotor 21 and a stator 22. The rotor 21 is configured such that a cylindrical rotor core 32 is fixed to the outer periphery of a rotating shaft 31. The stator 22 is cylindrical and disposed outside the rotor 21. The stator 22 is configured such that stator coils 34 are housed in multiple slots formed on the inner periphery of the cylindrical stator core 33. A certain gap 35 is formed between the outer peripheral surface of the rotor 21 and the inner peripheral surface of the stator 22 in both the circumferential and axial directions. When the rotary electric motor 11 is driven, the rotor 21 rotates due to the attraction and repulsion forces generated by the magnetic force generated by the current flowing in the stator coils 34, and the rotating shaft 31 outputs rotational force.

[0028] One axial end of the rotating shaft 31 is rotatably supported on the bracket 42 via a bearing 41, and the other axial end is rotatably supported on the bracket 44 via a bearing 43. The brackets 42 and 44 are circular plates, each having a circular hole 42a and 44a extending axially through its center. The bearings 41 and 43 are positioned between the rotating shaft 31 and the circular holes 42a and 44a of the brackets 42 and 44. The bearings 41 and 43 are supported by support portions 45 and 46 mounted on the brackets 42 and 44 to prevent them from falling off. The support portions 45 and 46 are cylindrical and engage with the circular holes 42a and 44a of the brackets 42 and 44 from the outer axial direction. One axial end of the rotating shaft 31 is covered by the bracket 42, and the other axial end protrudes outward from the circular hole 44a formed in the bracket 44. A coupling 12 is mounted on the end of the rotating shaft 31 that protrudes outward from the circular hole 44a of the bracket 44 (see reference). Figure 1 ).

[0029] The stator core 33 is formed into a ring by stacking multiple magnetic plates. The stator core 33 is configured such that a pair of stator pressing plates 47 and 48 are tightly attached to both sides in the stacking direction. The stator pressing plates 47 and 48 are ring-shaped. The stator pressing plates 47 and 48 are of the same shape and are connected by multiple (four in this embodiment) stator connecting portions 49 (50, 51, 52). The stator connecting portions 49 (50, 51, 52) are arranged at predetermined intervals on the outer periphery of the stator 22 in the circumferential direction. The stator coil 34 is disposed on the inner periphery of the stator core 33.

[0030] The rotor 21 has a cooling fan 54 connected to one axial side via a rotor pressing plate 53, and a cooling fan 56 connected to the other axial side via a rotor pressing plate 55. The cooling fans 54 and 56 are circular plates, each having multiple wing portions 54a and 56a spaced circumferentially at predetermined intervals on their outer periphery. The cooling fans 54 and 56 rotate integrally with the rotating shaft 31 and the rotor 21. The stator 22 has a bracket 57 on one axial side and a bracket 58 on the other axial side. The brackets 57 and 58 have circular holes 57a and 58a extending axially through their centers. The outer peripheries of the brackets 57 and 58 are connected to the outer peripheries of the stator pressing plates 47 and 48, thereby covering both axial sides of the stator 22. The outer peripheries of the brackets 57 and 58 contact the inner peripheries of the circular holes 57a and 58a. Annular labyrinth seals 59 and 60 are respectively disposed between the inner periphery of the circular holes 57a and 58a of the brackets 57 and 58 and the outer periphery of the cooling fans 54 and 56.

[0031] Furthermore, brackets 42 and 44 are located outside bearings 41 and 43, and are provided with multiple (four in this embodiment) external air intakes 61 and 62. The multiple external air intakes 61 and 62 are arranged at predetermined intervals circumferentially around brackets 42 and 44, and extend axially through brackets 42 and 44. Bracket 42 is located outside the external air intakes 61 and is provided with multiple (four in this embodiment) external air exhausts 63. The multiple external air exhausts 63 are arranged at predetermined intervals circumferentially around bracket 42 and are arranged axially along bracket 42. The external air intakes 61 and external air exhausts 63 are connected by a cooling passage 64. The cooling passage 64 is divided by bracket 42 and a cooling fan 54, with the wing 54a of the cooling fan 54 located within the cooling passage 64.

[0032] A cover 65 is disposed on the outer side of the bracket 58. The cover 65 is curved and has a circular hole 65a extending axially through its center. The cover 65 is connected to the outer periphery of the stator pressing plate 48 via its outer periphery, thereby covering the outer side of the bracket 58. An external air intake 62 communicates with one side of the cooling passage 66. The cooling passage 66 is divided by the bracket 44 and the cooling fan 56, and further divided by the bracket 58 and the cover 65, with the wing 56a of the cooling fan 56 located in the cooling passage 66. A ventilation passage 67 is formed between the stator core 33 and the stator connecting portions 49 (50, 51, 52). The ventilation passage 67 is arranged parallel to the axial direction of the stator 22. The stator pressing plates 47 and 48 have through holes 47a and 48a formed opposite to the ventilation passage 67. Ventilation passage 67 is connected to the other side of cooling passage 66 through through hole 48a, and is connected to the outside through through hole 47a.

[0033] When rotor 21 rotates, cooling fans 54 and 56 rotate. When cooling fan 54 rotates, it draws in outside air from outside air inlet 61 into cooling passage 64. The outside air drawn into cooling passage 64 cools rotor 21 as it flows through cooling passage 64 and is discharged to the outside from outside air outlet 63. Furthermore, when cooling fan 56 rotates, it draws in outside air from outside air inlet 62 into cooling passage 66. The outside air drawn into cooling passage 66 cools rotor 21 as it flows through cooling passage 66 and flows from through hole 48a into ventilation passage 67. The outside air drawn into ventilation passage 67 cools stator 22 as it flows through ventilation passage 67 and is discharged to the outside from through hole 47a.

[0034] Figure 3 This is a three-dimensional diagram showing the main parts of a rotating electrical machine. Figure 3 The diagram shows a rotary motor 11 with an interface mounted on the outer periphery of the stator 22. Furthermore, in... Figure 3 Rotating shaft 31 and rotor 21 are omitted.

[0035] In this embodiment, the interface comprises an upper mounting portion 71, a lower mounting portion 72, a limiter 73, and a stator connection portion 52. The upper mounting portion 71, lower mounting portion 72, limiter 73, and stator connection portion 52 are arranged at predetermined intervals along the circumference of the stator 22. The upper mounting portion 71, lower mounting portion 72, limiter 73, and stator connection portion 52 are respectively fixed to the stator core 33 and the stator pressing plates 47 and 48 by welding. The upper mounting portion 71 is a support portion for supporting the rotary motor 11 on the vehicle body and is fixed to the upper part of one side of the stator 22. The lower mounting portion 72 is a support portion for supporting the rotary motor 11 on the vehicle body and is fixed to the lower part of one side of the stator 22. The limiter 73 is used as a lifting device when transporting the rotary motor 11 and, when the rotary motor 11 detaches, is connected to the axle 14 (see reference). Figure 1 The stator connection 52 connects the stator pressing plates 47 and 48 to each other.

[0036] <Structure of the stator>

[0037] Figure 4 This is a schematic diagram showing the stator of a rotating electrical machine. Figure 4 The stator 22 of the rotating motor 11 is viewed from an obliquely upward angle.

[0038] The stator pressing plates 47 and 48 are annular. The stator core 33 is formed by overlapping multiple magnetic plates to form an annular shape, and the stator pressing plates 47 and 48 are arranged close to the ground on both sides in the stacking direction. The stator pressing plates 47 and 48 are annular, and through holes 47a and 48a are formed at predetermined intervals in the circumferential direction on the outer periphery.

[0039] The upper mounting portion 71, lower mounting portion 72, limiter 73, and stator connection portion 52, which serve as interfaces in this embodiment, are cast. That is, the upper mounting portion 71, lower mounting portion 72, limiter 73, and stator connection portion 52 are manufactured by pouring molten metal into a mold, cooling it, and then solidifying the metal.

[0040] <Interface Structure>

[0041] Figure 5 This is a perspective view showing the upper mounting part of a rotary electric motor.

[0042] exist Figure 5 The upper mounting section 71 is shown as viewed from an obliquely upward angle. (See figure) Figure 3 as well as Figure 5As shown, the upper mounting portion 71 includes a stator connecting portion 49, a fixing portion 81, and multiple support connecting portions 82 and 83. The stator connecting portion 49 is disposed on the outer periphery of the stator 22 between stator pressing plates 47 and 48. The stator connecting portion 49 has mounting surfaces 49a and 49b formed at one end and the other end of the stator 22 in the circumferential direction, and a cutout portion 49c is formed between the mounting surfaces 49a and 49b. The fixing portion 81 is disposed on the upper part of the stator connecting portion 49 and is arranged along the axial direction of the stator 22. The fixing portion 81 fixes the stator 22 to the rotary motor mounting position, and the mounting surface 81a is a horizontal surface with multiple (two in this embodiment) mounting holes 81b and 81c. The mounting surface 81a of the fixing portion 81 is a cut surface formed by surface alignment machining (e.g., cutting) after casting. Support connecting portions 82 and 83 connect the stator connecting portion 49 to the fixing portion 81. The support connecting portions 82 and 83 are arranged in a direction orthogonal to the stator connecting portion 49 and the fixing portion 81. Multiple support connecting portions 82 and 83 are arranged at predetermined intervals along the axial direction of the stator 22 (two in this embodiment). The support connecting portions 82 and 83 are respectively formed with through holes 82a and 83a.

[0043] Figure 6 This is a perspective view showing the lower mounting part of a rotary electric motor.

[0044] exist Figure 6 The lower mounting section 72 is shown as viewed from an obliquely upward angle. (See image below.) Figure 3 as well as Figure 6 As shown, the lower mounting portion 72 includes a stator connecting portion 50, a fixing portion 84, and multiple support connecting portions 85 and 86. The stator connecting portion 50 is disposed on the outer periphery of the stator 22 between stator pressing plates 47 and 48. The stator connecting portion 50 has mounting surfaces 50a and 50b formed at one end and the other end of the stator 22 in the circumferential direction, and a cutout portion 50c is formed between the mounting surfaces 50a and 50b. The fixing portion 84 is disposed on the side of the stator connecting portion 50 and is arranged along the axial direction of the stator 22. The fixing portion 84 fixes the stator 22 to the rotating motor mounting position. The mounting surface 84a is a vertical surface and has multiple (two in this embodiment) mounting holes 84b and 84c, and a through hole 84d is formed between the mounting holes 84b and 84c. The mounting surface 84a of the fixing portion 84 is a cut surface formed by surface alignment machining (e.g., cutting) after casting. Support connecting parts 85 and 86 connect the stator connecting part 50 and the fixing part 84. The support connecting parts 85 and 86 are arranged in a direction orthogonal to the stator connecting part 50 and the fixing part 84. Multiple support connecting parts 85 and 86 are arranged at predetermined intervals along the axial direction of the stator 22 (two in this embodiment).

[0045] Figure 7This is a 3D diagram showing the limit switch of a rotary electric motor.

[0046] exist Figure 7 The limiter 73 is shown as viewed from an obliquely upward angle. (See image below.) Figure 3 as well as Figure 7 As shown, the limiter 73 has a stator connecting portion 51 and multiple locking portions 87, 88. The stator connecting portion 51 is disposed on the outer periphery of the stator 22 between the stator pressing plates 47, 48. The stator connecting portion 51 has mounting surfaces 51a, 51b at one end and the other end of the stator 22 in the circumferential direction, and a cutout 51c is formed between the mounting surfaces 51a, 51b. The locking portions 87, 88 are connected to the outer surface of the stator connecting portion 51. The locking portions 87, 88 are arranged in a direction orthogonal to the stator connecting portion 51. Multiple locking portions 87, 88 are arranged at predetermined intervals in the axial direction of the stator 22 (two in this embodiment). The locking portions 87, 88 are respectively formed with through holes 87a, 87b.

[0047] Figure 8 This is a three-dimensional view showing the stator connection of a rotating electric machine.

[0048] exist Figure 8 The image shows the stator connection 52 as viewed from an obliquely upward angle. (See image below.) Figure 3 as well as Figure 8 As shown, the stator connecting portion 52 is disposed on the outer periphery of the stator 22 between the stator pressing plates 47 and 48. The stator connecting portion 52 has mounting surfaces 52a and 52b at one end and the other end of the stator 22 in the circumferential direction, and a cutout portion 52c is formed between the mounting surfaces 52a and 52b.

[0049] <Detailed Structure of the Stator>

[0050] Figure 9 This is a front view showing the installation status of the rotating electric machine. Figure 10 This is a top view showing the installed state of the rotating electric motor. Furthermore, in Figure 9 as well as Figure 10 Rotating shaft 31 and rotor 21 are omitted.

[0051] exist Figure 9 The image shows a front view of the rotary motor mounted on the trolley frame. Figure 10 The image shows a top view of the trolley with the rotary motor mounted on its frame. Figure 9 as well as Figure 10As shown, the rotary motor 11 has an upper mounting portion 71 and a lower mounting portion 72 fixed to the outer periphery of the stator 22. The frame 100 of the trolley, which serves as the mounting position for the rotary motor, is provided with a horizontal mounting surface 101 and a vertical mounting surface 102. The rotary motor 11 is fixed by bringing the mounting surface 81a of the fixing portion 81 of the upper mounting portion 71 into close contact with the horizontal mounting surface 101 of the frame 100, and by screwing fastening bolts (not shown) through mounting holes 81b and 81c and into the frame 100. Similarly, the rotary motor 11 is fixed by bringing the mounting surface 84a of the fixing portion 84 of the lower mounting portion 72 into close contact with the vertical mounting surface 102 of the frame 100, and by screwing fastening bolts (not shown) through mounting holes 84b and 84c and into the frame 100. When the rotary motor 11 is fixed to the frame 100 of the trolley, the limiter 73 is located above the axle 14. The limiter 73 is used as a lifting device, and when the rotating motor 11 falls off, the limiter 73 abuts against the axle 14 to prevent it from falling.

[0052] Here, the upper mounting part 71 is fixed to the outer peripheral surface of the stator 22, connecting a pair of stator pressing plates 47, 48 to each other, and fixing the stator 22 to the frame 100 of the trolley, which serves as the mounting position for the rotary motor. Furthermore, the upper mounting part 71 is continuously cast from the fixing surface to the outer peripheral surface of the stator 22 to the fixing surface to the horizontal mounting surface 101 of the frame 100.

[0053] Furthermore, the lower mounting section 72 is fixed to the outer peripheral surface of the stator 22, connecting a pair of stator pressing plates 47 and 48 to each other, and fixing the stator 22 to the frame 100 of the trolley, which serves as the mounting position for the rotary motor. The lower mounting section 72 is continuously cast from the fixing surface to the outer peripheral surface of the stator 22 to the fixing surface to the vertical mounting surface 102 of the frame 100.

[0054] <Example of installation state>

[0055] Figure 11 This is a top view showing a modified example of the mounting state of a rotating electric machine. Furthermore, in Figure 11 Rotating shaft 31 and rotor 21 are omitted.

[0056] In the above explanation, such as Figure 10 As shown, the upper mounting part 71 is such that the fixing part 81 is connected to the stator connecting part 49 via two support connecting parts 82 and 83. The stator connecting part 49 and the support connecting parts 82 and 83 are fixed to the outer periphery of the stator pressing plates 47 and 48. Mounting holes 81b and 81c are provided on both sides of the support connecting parts 82 and 83 of the fixing part 81, but the configuration is not limited to this.

[0057] exist Figure 11The image shows a top view of the trolley with the rotary motor mounted on its frame. Figure 11 As shown, the upper mounting portion 71A connects the fixing portion 81 to the stator connecting portion 49 via two support connecting portions 82 and 83. The stator connecting portion 49 is fixed to the outer periphery of the stator pressing plates 47 and 48. The support connecting portion 82 is fixed to the stator connecting portion 49 and also to the stator pressing plate 47. Although the support connecting portion 83 is fixed to the stator connecting portion 49, it is positioned at a length separated from the stator pressing plate 48 and is not fixed to the outer periphery of the stator pressing plate 48. The fixing portion 81 has a mounting hole 81b on the outside of the support connecting portion 82 and a mounting hole 81c between the support connecting portions 82 and 83. In this embodiment, since the upper mounting portion 71A is manufactured by casting, the positions and shapes of the support connecting portions 82 and 83 and the fixing portion 81 relative to the stator connecting portion 49 can be manufactured to match the configuration of the rotary motor 11. That is, the upper mounting part 71A can be made into a complex shape.

[0058] <Examples of variations of rotating electrical machines>

[0059] Figure 12 This is a cross-sectional view of the upper part showing a modified example of a rotary electric machine. Furthermore, regarding its use... Figure 2 Components that have been described and have the same function are given the same symbols, and detailed descriptions are omitted.

[0060] exist Figure 12 The diagram shows the internal structure of a rotary motor cut along its axis of rotation. (See diagram for reference.) Figure 12 As shown, the rotary motor 11A includes a rotor 21 and a stator 22. Cooling fins 91 are disposed on the outer surface of the stator connection portion 49. An upper mounting portion 71 is formed by connecting the fixing portion 81 to the stator connection portion 49 via support connections 82 and 83. The cooling fins 91 are composed of multiple plates. The multiple plates are disposed between the support connections 82 and 83 on the outer surface of the stator connection portion 49. The multiple plates are arranged circumferentially along the stator 22 and spaced at predetermined intervals along the axial direction of the stator 22 on the outer surface of the stator connection portion 49.

[0061] When rotor 21 rotates, cooling fan 56 rotates, and outside air is drawn into cooling passage 66 through outside air intake 62, flows through ventilation passage 67 and is then discharged. The outside air, whose temperature has risen due to cooling rotor 21 and stator 22, is used to heat stator connection 49. Here, stator connection 49 is cooled by releasing heat from cooling fins 91.

[0062] Furthermore, in the above description, cooling fins 91 are provided on the outer surface of the stator connection portion 49 of the rotary motor 11A, but cooling fins are also provided on the outer surfaces of the other stator connection portions 50, 51, and 52.

[0063] [Effects of the Implementation Method]

[0064] The rotary electric motor of this embodiment includes: a rotor 21; a stator 22, wherein a plurality of magnetic plates are stacked on the outer side of the rotor 21 to form a ring; a pair of stator pressing plates 47 and 48, which are ring-shaped and arranged on both sides of the stacking direction of the stator 22; an upper mounting portion 71 and a lower mounting portion 72, which are cast interfaces, are fixed to the outer peripheral surface of the stator 22 to connect the pair of stator pressing plates 47 and 48 to each other, and to fix the stator 22 to the rotary electric motor mounting position, and the structure is continuous from the fixing surface to the fixing surface to the rotary electric motor mounting position.

[0065] Therefore, by casting the upper mounting part 71, the lower mounting part 72, the limiter 73, and the stator connecting part 52, the manufacturing process can be simplified and the reliability can be improved. Furthermore, for example, when the stator pressing plates 47 and 48 are manufactured by stamping, no protrusion is needed on the outer periphery, resulting in a better material yield and reduced manufacturing costs.

[0066] In the rotary motor of this embodiment, the interface is such that the upper mounting portion 71 and the lower mounting portion 72 have stator connecting portions 49 and 50. Each circumferential end of the stator 22 is bent towards the outer peripheral surface of the stator 22 to form a fixing surface towards the outer peripheral surface of the stator 22. Each axial end of the stator 22 of the stator connecting portions 49 and 50 is respectively fixed to a pair of stator pressing plates 47 and 48. Therefore, the stator pressing plates 47 and 48 can be connected to the stator 22 as a single unit via the upper mounting portion 71 and the lower mounting portion 72.

[0067] In the rotary motor of this embodiment, a ventilation passage 67 for cooling air to flow along the axial direction of the stator 22 is located between the outer peripheral surface of the stator 22 and the stator connecting portions 49 and 50. The ventilation passage 67 is such that one axial end of the stator 22 communicates with the interior of the rotary motor through a through hole 48a in one stator pressing plate 48 and a cooling passage 66, while the other axial end of the stator 22 communicates with the exterior of the rotary motor through a through hole 47a in another stator pressing plate 47. Therefore, the stator 22 can be effectively cooled by the cooling air flowing in the ventilation passage 67.

[0068] In the rotary motor of this embodiment, the upper mounting portion 71 and the lower mounting portion 72 have fixing portions 81 and 84. These fixing portions 81 and 84 are formed with mounting surfaces 81a and 84a that are fixed to the frame 100, which serves as the mounting position for the rotary motor. The mounting surfaces 81a and 84a are machined surfaces that make surface contact with the mounting surfaces 101 and 102 of the frame 100. Therefore, the rotary motor 11 can be fixed with high precision to an appropriate position on the frame 100 using the fixing portions 81 and 84 of the upper mounting portion 71 and the lower mounting portion 72.

[0069] In the rotary motor of this embodiment, the upper mounting portion 71 and the lower mounting portion 72 have support connecting portions 82, 83, 85, and 86 that connect the stator connecting portions 49 and 50 to the fixing portions 81 and 84. The support connecting portions 82, 83, 85, and 86 are connected between a pair of stator pressing plates 47 and 48 in a direction orthogonal to the stator connecting portions 49 and 50 and the fixing portions 81 and 84. Therefore, the rigidity of the upper mounting portion 71 and the lower mounting portion 72 can be improved, and the rotary motor 11 can be firmly fixed to the frame 100.

[0070] In the rotary motor of this embodiment, cooling fins 91 are provided on the outer surface of the stator connection portion 49. Therefore, the heat of the stator 22 can be released through the cooling fins 91, resulting in efficient cooling.

[0071] Furthermore, in the above embodiment, the upper mounting part 71, the lower mounting part 72, the limiter 73, and the stator connection part 52 are described as interfaces, but other interfaces may also be used.

[0072] Furthermore, in the above embodiments, the rotary motor of this embodiment has been described as a fully enclosed induction motor, but it is not limited to this configuration.

[0073] The foregoing has described several embodiments of the present invention, but these embodiments are merely illustrative and not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, and are included within the scope of the invention described in the patent claims and its equivalents.

Claims

1. A rotary electric motor, comprising: Rotor; The stator has multiple magnetic plates stacked on the outside of the rotor to form a ring shape; A pair of stator pressing plates, arranged in a ring shape, are positioned on both sides of the stator in the stacking direction; and A cast interface is fixed to the outer peripheral surface of the stator to connect the pair of stator pressing plates to each other and to fix the stator to the rotating motor mounting position. The structure is continuous from the fixing surface to the outer peripheral surface of the stator to the fixing surface to the rotating motor mounting position. The interface has a stator connection portion, wherein each end of the stator in the circumferential direction of the stator connection portion is bent toward the outer circumferential surface of the stator to form a fixing surface toward the outer circumferential surface of the stator, and each end of the stator in the axial direction of the stator connection portion is respectively fixed to the pair of stator pressing plates.

2. The rotary motor as claimed in claim 1, wherein, The outer peripheral surface of the stator and the stator connection portion are connected by a ventilation path for cooling air to flow in the axial direction of the stator. One end of the ventilation path in the axial direction of the stator is connected to the interior of the rotating motor through a through hole in one of the stator pressing plates and a cooling passage. The other end of the stator in the axial direction of the stator is connected to the exterior of the rotating motor through a through hole in another stator pressing plate.

3. The rotary motor as described in claim 1 or 2, wherein, The interface described above has a fixing part having a fixing surface that is directed toward the mounting position of the rotary motor. The fixing surface is a machined surface that makes surface contact with the mounting surface of the rotary motor mounting position.

4. The rotary motor as described in claim 3, wherein, The interface has a support connection portion that connects the stator connection portion and the fixing portion. The support connection portion is connected between the pair of stator pressing plates in a direction orthogonal to the stator connection portion and the fixing portion.

5. The rotary motor as described in claim 2 or 4, wherein, Cooling fins are provided on the outer surface of the stator connection part.

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