Wire connection structure and stator structure

Abstract

To provide a wire connection structure capable of increasing versatility to cope with various stator bodies, and a stator structure.SOLUTION: A wire connection structure 1 according to the present disclosure includes a bus bar holder 10, a neutral point bus bar 20 arranged on the bus bar holder 10, and a plurality of lead wire terminals 30. In the neutral point bus bar 20, one or more neutral point connection parts, to which a wiring 111 is directly connected, are formed. In each lead wire terminal 30, each wiring connection part to which the wiring 111 is directly connected is formed. A plurality of wiring fixing parts for fixing the routed wirings 111, respectively, are formed on a first surface 10a of the bus bar holder 10.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a wiring structure and a stator structure. [Background technology]

[0002] A busbar unit has been known that includes annular or C-shaped busbars that correspond to multiple concentrically formed annular body support grooves. The busbars have terminal portions that are joined to corresponding coil wire ends, and the terminal portions are provided to protrude from the annular or C-shaped body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-205876 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional busbar units, in order to arrange multiple terminals corresponding to multiple coil wire ends depending on the corresponding motor, annular or C-shaped busbars with terminals were specially designed and prepared and arranged concentrically. In other words, busbar units were manufactured individually according to the number of slots, number of circuits, and wiring pattern of the motor, and even if the motor's external shape was the same, a dedicated busbar unit was manufactured. As such, because busbar units were manufactured individually for each motor, there was a problem in that the busbar units could not be made more versatile.

[0005] In order to solve the above problems, the present disclosure aims to provide a wiring structure and a stator structure that can be made more versatile so that they can be used with various stator bodies. [Means for solving the problem]

[0006] The wiring structure according to the present disclosure comprises a busbar holder that is annular or a portion of the annular shape, a midpoint busbar arranged on the busbar holder, and a plurality of lead wire terminals, the midpoint busbar having one or more midpoint connection portions formed thereon to which all of the wires extending from the coil that should be connected to the midpoint busbar are directly connected, and each lead wire terminal has a wiring connection portion formed thereon to which all of the wires that should be connected to the corresponding lead wire terminal are directly connected, and a first surface, which is one surface of the busbar holder along which the wires are routed to connect to each lead wire terminal and the midpoint busbar, has a plurality of wiring fixing portions formed thereon to fix each of the wires to be routed.

[0007] The stator structure according to the present disclosure comprises the wiring structure according to the present disclosure and a stator body in which coils are arranged corresponding to a plurality of teeth protruding radially inward from an annular yoke portion, and each coil is electrically connected to a respective wire, and the corresponding wire is electrically connected to each midpoint bus bar. [Effects of the Invention]

[0008] The wiring structure and stator structure according to the present disclosure can be made more versatile so that they can be adapted to various stator bodies. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing an outline of a stator structure according to a first embodiment. [Figure 2] FIG. 2 is a top view showing the stator structure in FIG. [Figure 3] FIG. 2 is a side view showing the stator structure in FIG. [Figure 4] 2 is a perspective view showing an outline of the stator structure in FIG. 1 with a cover removed. [Figure 5] FIG. 5 is a top view showing the stator structure in FIG. [Figure 6]FIG. 5 is a side view showing the stator structure in FIG. [Figure 7] 2 is a perspective view showing an outline of a first surface of the bus bar holder in FIG. 1. FIG. [Figure 8] 8 is a perspective view showing an outline of the surface opposite to the first surface of the bus bar holder in FIG. 7. FIG. [Figure 9] FIG. 8 is a top view showing the bus bar holder in FIG. 7. [Figure 10] FIG. 8 is a side view showing the bus bar holder in FIG. 7. [Figure 11] FIG. 8 is a bottom view showing the bus bar holder in FIG. 7. [Figure 12] FIG. 5 is a perspective view showing the midpoint bus bar in FIG. [Figure 13] FIG. 2 is a perspective view showing a lead terminal in FIG. [Figure 14] FIG. 2 is a perspective view showing an outline of the cover in FIG. [Figure 15] FIG. 15 is a perspective view showing the outline of the rear surface of the cover in FIG. [Figure 16] FIG. 15 is a top view showing the cover in FIG. [Figure 17] FIG. 15 is a side view showing the cover in FIG. [Figure 18] FIG. 15 is a bottom view showing the cover in FIG. [Figure 19] FIG. 2 is a perspective view showing an outline of a stator body in FIG. [Figure 20] FIG. 2 is an exploded view of the stator structure in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Embodiment 1 Fig. 1 is a perspective view showing an outline of a stator structure 200 according to embodiment 1. Fig. 2 is a top view showing the stator structure 200 in Fig. 1. Fig. 3 is a side view showing the stator structure 200 in Fig. 1.

[0011] The stator structure 200 is annular in shape. A straight line passing through the center of the annular shape of the stator structure 200 is defined as a stator axis LS.

[0012] A rotor (not shown) that can rotate around the stator axis LS is inserted into a cylindrical space formed in the center of the stator structure 200. The stator structure 200 and the rotor form a motor. A rotating body that can rotate around the stator axis LS may also be inserted into the cylindrical space of the stator structure 200. In this case, the stator structure 200 is used as part of a resolver that can detect the rotational speed of the rotating body. The stator structure 200 of the present disclosure may also be used in devices other than motors and resolvers.

[0013] The stator structure 200 includes an annular stator body 210 and an annular wiring structure 1 disposed on an end surface thereof. The central axis of the annular stator body 210 is a stator axis LS, which is the central axis of the stator structure 200. When viewed along the stator axis LS, the direction along the radius of the annular stator body 210 is the radial direction, and the direction along the circumference, which is the outer periphery of the stator body 210, is the circumferential direction.

[0014] When the wiring structure 1 is arranged on the end face of the annular stator body 210, the central axis of the stator body 210, i.e., the stator axis LS of the stator structure 200, and the central axis of the wiring structure 1 are on the same straight line.

[0015] The wiring structure 1 includes a bus bar holder 10, a cover 40 that covers one side of the bus bar holder 10, and three lead wire terminals 30 that are arranged on the bus bar holder 10. Each of the three lead wire terminals 30 is inserted into a through hole 41 formed in the cover 40, and extends through the cover 40 to the outside thereof.

[0016] Fig. 4 is a perspective view showing an outline of the stator structure 200 in Fig. 1 with the cover 40 removed. Fig. 5 is a top view showing the stator structure 200 in Fig. 4. Fig. 6 is a side view showing the stator structure 200 in Fig. 4.

[0017] The wiring structure 1 further includes a midpoint busbar 20. When one surface of the busbar holder 10 is defined as a first surface 10a, the midpoint busbar 20 and each lead wire terminal 30 are arranged on the first surface 10a.

[0018] A plurality of wires 111 extending from the stator body 210 are arranged to crawl on the first surface 10a of the bus bar holder 10. Each wire 111 is connected to a corresponding midpoint bus bar 20 and each lead wire terminal 30. The midpoint bus bar 20, the lead wire terminal 30, and the wires 111 will be described later.

[0019] Fig. 7 is a perspective view showing an outline of the first surface 10a of the bus bar holder 10 in Fig. 1. Fig. 8 is a perspective view showing an outline of the surface opposite to the first surface 10a of the bus bar holder 10 in Fig. 7. Fig. 9 is a top view showing the bus bar holder 10 in Fig. 7. Fig. 10 is a side view showing the bus bar holder 10 in Fig. 7. Fig. 11 is a bottom view showing the bus bar holder 10 in Fig. 7. Here, the first surface 10a is the upper surface of the bus bar holder 10.

[0020] The bus bar holder 10 is annular in shape. An axis passing through the center of the annular bus bar holder 10 is defined as a central axis L. The bus bar holder 10 is made of a non-conductive material.

[0021] The busbar holder 10 is a component that determines the general shape of the wiring structure 1. Therefore, the central axis of the annular wiring structure 1 is equal to the central axis L of the busbar holder 10. When viewed along the central axis L, the direction along the radius of the annular busbar holder 10 is the radial direction, and the direction along the circumference, which is the outer periphery of the busbar holder 10, is the circumferential direction.

[0022] The first surface 10a of the busbar holder 10 is formed with a plurality of wiring fixing portions 11, two bulge receiving portions 12, a plurality of midpoint busbar receiving portions 13, three lead wire terminal receiving portions 14, and four cover mounting portions 15.

[0023] Each wiring fixing portion 11 is a protrusion-like or wall-like portion extending from the first surface 10a of the bus bar holder 10 along the central axis L. Each wiring fixing portion 11 fixes the wiring 111 on the first surface 10a. The fixing of the wiring 111 by the wiring fixing portion 11 will be described later.

[0024] Each of the bulging receiving portions 12 and the midpoint busbar receiving portions 13 is a protrusion-like or wall-like portion that extends from the first surface 10a of the busbar holder 10 along the central axis L. The midpoint busbar 20 on the first surface 10a is fixed by each of the bulging receiving portions 12 and the midpoint busbar receiving portions 13. The arrangement of the midpoint busbar 20 on the first surface 10a will be explained later.

[0025] Each lead wire terminal receiving portion 14 is a pair of grooves extending in a direction parallel to the first surface 10a. By inserting a plate-shaped lead wire terminal 30 into the pair of grooves of the lead wire terminal receiving portion 14, the lead wire terminal 30 is arranged on the bus bar holder 10. The lead wire terminal 30 and its arrangement on the first surface 10a will be described later.

[0026] Each cover mounting portion 15 is a hole that penetrates from the first surface 10a to the opposite surface of the bus bar holder 10. The cover 40 is fixed by the cover mounting portions 15. The fixing and arrangement of the cover 40 will be described later.

[0027] A plurality of inner peripheral side walls 16 are formed on the inner peripheral edge of the bus bar holder 10 and extend along the central axis L. The plurality of inner peripheral side walls 16 protrude in both directions, away from the first surface 10a and away from the surface opposite the first surface 10a.

[0028] The inner peripheral side wall 16 protruding in a direction away from the first surface 10a is not formed around the entire circumference of the inner peripheral edge, but is made up of multiple inner peripheral side wall portions 16. Similarly, the inner peripheral side wall 16 protruding in a direction away from the surface opposite the first surface 10a is not formed around the entire circumference of the inner peripheral edge, but is made up of multiple inner peripheral side wall portions 16.

[0029] A plurality of wiring grooves 17 are formed on the outer peripheral edge of the bus bar holder 10. Corresponding wires 111 are fitted into and fixed in the plurality of wiring grooves 17. In the first embodiment, the wiring grooves 17 are formed at 24 locations on the outer peripheral edge of the bus bar holder 10. That is, two wiring grooves 17 are formed for each coil 110.

[0030] 12 is a perspective view showing the midpoint busbar 20 in FIG. 4. The midpoint busbar 20 is made of a conductive material. The midpoint busbar 20 is formed by deforming a plate material into a C-shape. The midpoint busbar 20 has six midpoint connection portions 21 and two bulge portions 22.

[0031] Each midpoint connection portion 21 is a hook-shaped portion formed by bending a portion of the midpoint busbar 20. A corresponding wire 111 is directly connected to each midpoint connection portion 21. For example, by directly winding the corresponding wire 111 around each midpoint connection portion 21, the wire 111 and the midpoint busbar 20 are mechanically and electrically connected to each other. Furthermore, the wire 111 wound around the midpoint connection portion 21 may be soldered or welded to more firmly secure the midpoint connection portion 21 and the wire 111.

[0032] Each bulging portion 22 is a part of the midpoint busbar 20. Each bulging portion 22 is formed so as to bulge outward in a C-shape. In the first embodiment, each bulging portion 22 is formed so as to bulge outward in a C-shape, but each bulging portion 22 may be formed so as to bulge inward in a C-shape.

[0033] 13 is a perspective view showing the lead wire terminal 30 in FIG. Each lead wire terminal 30 is made of a conductive plate material. The lead wire terminal 30 is formed by bending the plate material into an L-shape. The portion of the lead wire terminal 30 extending from the L-shaped bent portion to one end is inserted into the through-hole 41 of the cover 40 and extends outward.

[0034] A lead wire connection portion 32 is formed in a portion of the lead wire terminal 30 near the end of the portion that extends from the L-shaped bent portion to one end. The lead wire connection portion 32 is a through hole formed in the lead wire terminal 30.

[0035] The end of a lead wire (not shown) is inserted into the hole of the lead wire connection portion 32, thereby electrically connecting the lead wire to the lead wire connection portion 32. To further strengthen the connection, the end of the lead wire may be entangled with the lead wire connection portion 32 or may be joined by a method such as welding.

[0036] In the portion of the lead wire terminal 30 extending from the L-shaped bent portion to one end, a wiring connection portion 31 is formed in a portion closer to the bent portion than the lead wire connection portion 32.

[0037] In the first embodiment, the wire connection portion 31 is a through hole formed in the lead wire terminal 30. By inserting an end of the corresponding wire 111 into the wire connection portion 31, which is a hole, the wire 111 and the wire connection portion 31 are electrically and directly connected to each other. In order to further strengthen the connection, the end of the wire 111 may be entangled with the wire connection portion 31 or may be joined by a method such as welding.

[0038] The portion of the lead wire terminal 30 that extends from the L-shaped bent portion to the other end opposite to one end is the terminal mounting portion 33. The terminal mounting portion 33 is fitted into a pair of grooves that are the corresponding lead wire terminal receiving portions 14 of the bus bar holder 10. In this way, the lead wire terminal 30 is arranged in the bus bar holder 10.

[0039] The lead wire terminals 30 are fixed to the bus bar holder 10 by friction between the lead wire terminal receiving portions 14 and the terminal mounting portions 33. If it is desired to strengthen this fixation, the lead wire terminal receiving portions 14 and the terminal mounting portions 33 may be further joined with an adhesive or the like. Alternatively, the lead wire terminal receiving portions 14 and the terminal mounting portions 33 may be formed with shapes that allow them to engage with each other, and the engagement between them may provide a stronger fixation.

[0040] Fig. 14 is a perspective view showing an outline of the cover 40 in Fig. 1. Fig. 15 is a perspective view showing an outline of the back surface of the cover 40 in Fig. 14. Fig. 16 is a top view showing the cover 40 in Fig. 14. Fig. 17 is a side view showing the cover 40 in Fig. 14. Fig. 18 is a bottom view showing the cover 40 in Fig. 14.

[0041] The cover 40 has an annular shape and is disposed so as to cover the first surface 10a of the bus bar holder 10. Here, the surface of the cover 40 facing the first surface 10a is referred to as the back surface, and the surface of the cover 40 opposite the back surface is referred to as the front surface.

[0042] A step portion 42, which is a portion that protrudes along the central axis L, is formed on the surface of the cover 40. Three through holes 41 are formed in the step portion 42, through which the corresponding lead wire terminals 30 can be passed.

[0043] The cover 40 has a rear surface formed with protruding wall-like portions along the inner peripheral edge and the outer peripheral edge.

[0044] The cover 40 is formed with four mounting portions 43. The mounting portions 43 are plate-shaped portions that protrude from the back surface of the cover 40 along the central axis L. A cover step surface 43a, which is a surface perpendicular to the central axis L, is formed at the tip of each mounting portion 43. The cover step surface 43a faces in the opposite direction to the protruding direction of the mounting portions 43. In other words, the cover step surface 43a faces the back surface of the cover 40.

[0045] The mounting portion 43 is connected to a cover mounting portion 15 formed on the bus bar holder 10, and the bus bar holder 10 and the cover 40 are fixed to each other. The cover mounting portion 15 will be described later.

[0046] A plurality of wall recesses 44 are formed in the wall along the outer periphery of the cover 40. The outer periphery wall of the cover 40 on which the plurality of wall recesses 44 are formed has an uneven shape at its end. The plurality of wall recesses 44 are disposed opposite the protruding members 213 of the stator body 210. The protruding members 213 of the stator body 210 and the wall recesses 44 will be described later.

[0047] A plurality of ribs 45 are formed on the rear surface of the cover 40 .

[0048] Fig. 19 is a perspective view showing an outline of stator body 210 in Fig. 1. Stator body 210 has an annular yoke portion 211, twelve teeth 212 protruding radially inward from yoke portion 211, twelve protruding members 213 attached to yoke portion 211, twelve coils 110 arranged corresponding to each tooth 212, and wires 111 electrically connected to each coil 110. Note that Fig. 19 depicts only one wire 111, and the other wires 111 are not depicted.

[0049] The stator body 210 has a pair of end faces perpendicular to the stator axis LS. Twelve wires 111 extending from each coil 110 extend from one of the pair of end faces of the stator body 210. That is, the wires 111 extend in the same direction along the central axis L.

[0050] The twelve protruding members 213 attached to the yoke portion 211 make the outer periphery of the end face of the stator body 210 where the wiring structure 1 is arranged have an uneven shape at the end.

[0051] The arrangement on the first surface 10a of the busbar holder 10 will be further described with reference to Figures 5, 7, 9, and 12. The midpoint busbars 20 are arranged in the busbar holder 10 so as to form a C-shape when viewed along the central axis L. Note that in Figure 5, to avoid cluttering the drawing, reference numerals 12, 13, 16, and 22 for the bulge receiving portion 12, the midpoint busbar receiving portion 13, the inner peripheral side wall portion 16, and the bulge portion 22, which will be described below, are not shown.

[0052] The midpoint busbar 20 is disposed on the first surface 10a of the busbar holder 10 so as to extend along the inner circumferential sidewall 16. A portion of the midpoint busbar 20 is disposed between the inner circumferential sidewall 16 and the midpoint busbar receiving portion 13. In other words, the midpoint busbar 20 is disposed opposite the midpoint busbar receiving portion 13 and opposite each of the inner circumferential sidewalls 16, thereby fixing the midpoint busbar 20 to the busbar holder 10.

[0053] When the midpoint busbar 20 is arranged on the first surface 10a, the bulging receiving portions 12 are fitted inside the corresponding bulging portions 22. That is, the bulging receiving portions 12 and the bulging portions 22 are arranged opposite each other, thereby fixing the midpoint busbar 20 to the busbar holder 10.

[0054] Each of the multiple wires 111 extending from the stator body 210 extends onto the first surface 10a while fitting into a corresponding wire groove 17. Each wire 111 is arranged along the first surface 10a and connected to a corresponding midpoint bus bar 20 and each lead terminal 30.

[0055] On the first surface 10a, each of the wires 111 is routed so as to appropriately wrap around the periphery of the wire fixing portion 11. That is, the wires 111 are routed so as to pass around the periphery of the wire fixing portion 11, and are thereby fixed by the wire fixing portion 11.

[0056] 7, 15, and 17, the description of the arrangement of the bus bar holder 10 and the cover 40 continues. Into each cover mounting portion 15 of the bus bar holder 10, a corresponding mounting portion 43 is inserted.

[0057] When the mounting portion 43 corresponding to the cover mounting portion 15 is inserted, the cover step surface 43a formed at the tip of the mounting portion 43 catches on the surface opposite to the first surface 10a of the bus bar holder 10. This connects the cover mounting portion 15 and the mounting portion 43 to each other, and the bus bar holder 10 and the cover 40 are fixed to each other.

[0058] In this way, the bus bar holder 10 and the cover 40 are connected to each other, and the cover 40 is disposed on the bus bar holder 10. The attachment portion 43 may be made of an elastically deformable material, such as plastic.

[0059] This allows the mounting portion 43 to be elastically deformed, thereby releasing the engagement between the cover step surface 43a and the surface opposite the first surface 10a of the bus bar holder 10. Therefore, once the bus bar holder 10 and the cover 40 are connected, the cover 40 can be removed from the bus bar holder 10.

[0060] 1, 14, and 19, when the wiring structure 1 equipped with the cover 40 is placed on the end face of the stator body 210, each protruding member 213 fits into the corresponding wall recess 44. That is, the uneven shape of the outer peripheral wall of the cover 40 formed by the multiple wall recesses 44 and the uneven shape of the outer peripheral edge of the stator body 210 formed by the multiple protruding members 213 fit together.

[0061] Figure 20 is an exploded view of the stator structure 200 in Figure 1. The assembly of the stator structure 200 will be described further with reference to Figures 1 to 6 and 20.

[0062] The wiring structure 1 is disposed on the stator body 210 so as to cover one of a pair of end faces of the stator body 210 from which the wiring 111 extends. Each of the wiring 111 extending from the stator body 210 is electrically connected to the wiring structure 1.

[0063] More specifically, the bus bar holder 10 is arranged so as to cover one of a pair of end faces of the stator body 210 from which the wires 111 extend. A midpoint bus bar 20 and three lead wire terminals 30 are arranged on a first surface 10a of the bus bar holder 10. Although not shown in FIG. 20 , each wire 111 is routed over the first surface 10a and connected to the corresponding midpoint bus bar 20 and each lead wire terminal 30.

[0064] With the midpoint busbar 20, the three lead wire terminals 30, and the wiring 111 arranged on the first surface 10a, the cover 40 is placed on the busbar holder 10. In this way, the cover 40 covers the midpoint busbar 20 and the plurality of lead wire terminals 30 arranged on the busbar holder 10, and the plurality of wiring 111 arranged on the first surface 10a of the busbar holder 10.

[0065] When the cover 40 is placed on the bus bar holder 10, it has an annular box shape, and the cover 40 defines a space on the first surface 10a of the bus bar holder 10. The space defined on the first surface 10a of the bus bar holder 10 by the cover 40 is larger in the area corresponding to the step portion 42. This allows a larger space to be defined for the connection between each lead wire terminal 30 and the wiring 111 connected to it.

[0066] When the cover 40 is placed on the busbar holder 10, the lead wire connection portion 32 of the lead wire terminal 30 is located outside the cover 40, and the wiring connection portion 31 is located in the space on the first surface 10a defined by the cover 40.

[0067] 1 to 6, the arrangement of each wire 111 will be further described. Each wire 111 is inserted into and fitted into a corresponding wire groove 17 of the bus bar holder 10. Each wire 111 extends to the first surface 10a of the bus bar holder 10 while being fitted into the corresponding wire groove 17.

[0068] Each wiring 111 extending to the first surface 10a of the bus bar holder 10 is routed and wired on the first surface 10a of the bus bar holder 10, and is connected to the corresponding midpoint bus bar 20 or the corresponding lead wire terminal 30.

[0069] Each wire 111 is electrically connected to the midpoint connection portion 21 of the corresponding midpoint bus bar 20 or the wire connection portion 31 of the corresponding lead wire terminal 30 .

[0070] On the first surface 10a, the wirings 111 are adjacent to, overlap with, or cross each other with corresponding wirings 111. Since each wiring 111 uses an electric wire whose wires are covered with an insulating material, corresponding wirings 111 do not short-circuit even if they are adjacent to, overlap with, or cross each other.

[0071] When all the wires 111 are connected to the midpoint bus bar 20 through the wire grooves 17, the wiring structure 1 is arranged to cover the end face of the stator body 210 without using any fastening means.

[0072] Note that well-known fastening means may be used to more firmly position the wiring structure 1 on the end surface of the stator body 210. Well-known fastening means include fastening with screws, fastening with snap members, and fastening with a caulking method.

[0073] The wiring structure 1 according to the first embodiment includes a busbar holder 10 that is annular or a portion of an annular shape, a midpoint busbar 20 that is arranged on the busbar holder 10, and a plurality of lead wire terminals 30. The midpoint busbar 20 is formed with one or more midpoint connection portions 21 to which all of the wires 111 extending from the coil 110 that should be connected to the midpoint busbar 20 are directly connected. Each lead wire terminal 30 is formed with a wire connection portion 31 to which all of the wires 111 that should be connected to the corresponding lead wire terminal 30 are directly connected. A first surface 10a, which is one surface of the busbar holder 10 along which the wires 111 are routed to connect to each lead wire terminal 30 and the midpoint busbar 20, is formed with a plurality of wire fixing portions 11 for fixing each of the routed wires 111. This allows the wires 111 to be directly connected to the midpoint busbar 20 and the lead terminals 30, respectively, depending on the number of slots, the number of circuits, and the wiring pattern of the stator body 210, thereby improving the degree of freedom in selecting the wiring path of the wires 111. Therefore, a single wiring structure 1 can be used for various stator bodies 210. This increases the versatility of the wiring structure 1 so that it can be used for various stator bodies 210. This also allows the wires 111 running along the first surface 10a to be more securely fixed by the wire fixing portion 11. This prevents movement of the wires 111 due to vibration, and prevents breakage or poor connection of the wires 111 due to such movement, making it possible to provide a wiring structure 1 that is highly earthquake-resistant and reliable.

[0074] In the wiring structure 1 according to the first embodiment, when an axis passing through the center of the bus bar holder 10, which is annular or a part of an annular shape, is taken as a central axis L, the plurality of wire fixing portions 11 are protruding portions that extend along the central axis L from the first surface 10a of the bus bar holder 10. This allows each wire 111 to run along the protruding wire fixing portion 11, thereby preventing the wires 111 from moving. Therefore, no special work or parts are required to fix the wires 111. This allows the wires 111 to be fixed by a simple manufacturing process, thereby reducing manufacturing costs.

[0075] In the wiring structure 1 according to the first embodiment, when the central axis L is an axis passing through the center of the busbar holder 10, which is an annular shape or a portion of an annular shape, the busbar holder 10 has one or more inner circumferential side walls 16 formed along the inner circumferential edge of the busbar holder 10. The one or more inner circumferential side walls 16 extend from the first surface 10a along the central axis L. This prevents the wiring 111 running along the first surface 10a of the busbar holder 10 from being positioned closer to the center than the inner circumferential edge of the busbar holder 10. This prevents interference with a rotor or a rotating body inserted in the center of the stator structure 200. This prevents interference with the rotor or a rotating body, providing a stator structure 200 that operates more stably.

[0076] In the wiring structure 1 according to the first embodiment, the shape of the midpoint busbar 20 is C-shaped when viewed along the central axis L. The busbar holder 10 is formed with one or more midpoint busbar receiving portions 13, each of which protrudes from the first surface 10a of the busbar holder 10. When the midpoint busbar 20 is placed in the busbar holder 10, the midpoint busbar 20 faces the midpoint busbar receiving portions 13 and each of the inner peripheral sidewall portions 16, thereby securing the midpoint busbar 20 to the busbar holder 10. This prevents movement of the midpoint busbar 20 due to vibration and more firmly secures the midpoint busbar 20. This prevents poor connection between the midpoint busbar 20 and the wiring 111 due to vibration. This provides a wiring structure 1 that is highly earthquake-resistant and reliable.

[0077] In the wiring structure 1 according to the first embodiment, one or more bulging portions 22 that bulge outward or inward in a C-shape are formed on a portion of the midpoint busbar 20 when viewed along the central axis L. The busbar holder 10 also has one or more bulging receiving portions 12 formed on its first surface 10a. When the midpoint busbar 20 is placed in the busbar holder 10, the bulging receiving portions 12 and the bulging portions 22 are positioned opposite each other, thereby securing the midpoint busbar 20 to the busbar holder 10. This prevents movement of the midpoint busbar 20 due to vibration and more firmly secures the midpoint busbar 20. This prevents poor connection between the midpoint busbar 20 and the wiring 111 due to vibration. This provides a wiring structure 1 that is highly earthquake-resistant and reliable.

[0078] The wiring structure 1 according to the first embodiment further includes a cover 40 disposed over the midpoint busbar 20 disposed on the busbar holder 10. The cover 40 has one or more through holes 41 formed therein through which the corresponding lead terminals 30 can pass. This prevents movement of the midpoint busbar 20, the wires 111, and the lead terminals 30 due to vibration, and more firmly secures the midpoint busbar 20, the wires 111, and the lead terminals 30. This prevents movement of the elements due to vibration and connection failure. This provides a highly earthquake-resistant and reliable wiring structure 1. This also prevents adhesion of dust and other contaminants to the midpoint busbar 20, the wires 111, and the lead terminals 30. This keeps the midpoint busbar 20, the wires 111, and the lead terminals 30 clean. This provides a highly reliable stator structure 200.

[0079] In the wiring structure 1 according to the first embodiment, the cover 40 is formed with one or more mounting portions 43, and the bus bar holder 10 is formed with one or more cover mounting portions 15 connected to each mounting portion 43. The cover 40 is fixed to the bus bar holder 10 by connecting the corresponding mounting portion 43 to the cover mounting portion 15. As a result, the connection points between the cover 40 and the bus bar holder 10 are predetermined, and the wiring 111 can be positioned to avoid the cover mounting portions 15. Therefore, when the cover 40 is fixed to the bus bar holder 10, it does not interfere with the wiring 111, and the cover 40 can be easily fixed to the bus bar holder 10. This makes it easy to manufacture a stator structure 200 including the wiring structure 1.

[0080] In the wiring structure 1 according to the first embodiment, a plurality of wiring grooves 17 into which the wirings 111 can be fitted are formed on the outer peripheral edge of the bus bar holder 10. This allows each wiring 111 to be more firmly connected and fixed to the bus bar holder 10. This prevents misalignment and separation between each wiring 111 and the bus bar holder 10 due to vibration or the like. This makes it possible to provide a stator structure 200 with a more stable structure.

[0081] In the wiring structure 1 according to the first embodiment, two wiring grooves 17 are formed for each corresponding coil 110. This makes it possible to accommodate either a stator body 210 having a configuration in which one or two wires 111 extend from the coil 110. This increases the versatility of the wiring structure 1 so that it can be adapted to various stator bodies 210.

[0082] In the wiring structure 1 according to the first embodiment, each midpoint connection portion 21 is a hook-shaped portion formed by bending a portion of the midpoint busbar 20. This allows the wiring 111 to be connected to the midpoint connection portion 21 by tying it around the hook-shaped portion, making it easier to connect the wiring 111 to the midpoint connection portion 21. This makes it easier to manufacture the stator structure 200. Furthermore, this allows the wiring 111 to be more firmly connected to the midpoint connection portion 21 by tying it around the hook-shaped portion. This prevents poor connection between the midpoint busbar 20 and the wiring 111. This makes it possible to provide a wiring structure 1 that is more earthquake-resistant and reliable.

[0083] The stator structure 200 according to the first embodiment includes the wiring structure 1 of the present disclosure and a stator body 210 in which coils 110 are arranged corresponding to a plurality of teeth 212 protruding radially inward from an annular yoke portion 211. Furthermore, each coil 110 is electrically connected to a respective wire 111, and the corresponding wire 111 is electrically connected to the midpoint busbar 20. This allows the wiring structure 1 to be used, which allows the midpoint busbar 20 to be appropriately arranged depending on the number of slots, the number of circuits, and the wiring pattern of the stator body 210. Furthermore, each of the wires 111 is directly connected to the midpoint busbar 20 and the lead terminal 30, which increases the degree of freedom in selecting the wiring path of each wire 111. Therefore, a single wiring structure 1 can be used for various stator bodies 210. Therefore, a stator structure 200 can be obtained using the wiring structure 1, which has increased versatility so that it can be used for various stator bodies 210. This also allows the wiring 111 running over the first surface 10a to be more firmly fixed by the wiring fixing portion 11. This prevents the wiring 111 from moving due to vibration, and prevents the wiring 111 from being cut or having a poor connection due to the movement. This makes it possible to provide a stator structure 200 that is highly earthquake-resistant and includes a highly reliable wiring connection structure 1.

[0084] In the stator structure 200 according to the first embodiment, the wires 111 are arranged so as to run along the first surface 10a of the bus bar holder 10, and corresponding wires 111 cross each other. This provides greater flexibility in selecting the wiring paths of the multiple wires 111. Therefore, it is possible to obtain a stator structure 200 using the wiring structure 1 that is more versatile so as to be compatible with various stator bodies 210.

[0085] In the bus bar holder 10 according to the first embodiment, two wiring grooves 17 are formed for each coil 110. However, this is not limited to this. For example, one wiring groove 17 may be formed for each coil 110 in the bus bar holder 10. Furthermore, two or more wiring grooves 17 may be formed for each coil 110 in the bus bar holder 10. This allows one bus bar holder 10 to accommodate various arrangements of coils 110 or arrangements of wires 111 extending from the coils 110.

[0086] Furthermore, the wiring structure 1 in the first embodiment is disposed on the end face of the stator body 210 so that the central axis L of the wiring structure 1 coincides with the stator axis LS, which is the central axis of the stator body 210. However, this is not limited to this. For example, the wiring structure 1 can be disposed with the central axis L of the wiring structure 1 offset from the stator axis LS of the stator body 210, as long as it does not interfere with the rotor or rotating body inserted into the cylindrical space formed in the center of the stator structure 200. This allows one wiring structure 1 to be used for stator bodies 210 of various sizes. Therefore, the wiring structure 1 can be used with increased versatility.

[0087] In addition, in the first embodiment, the cover 40 and the bus bar holder 10 are fixed together by using the catch on the cover step surface 43a of the mounting portion 43 inserted into the hole. However, this is not limited to this. For example, well-known fixing methods such as screw fastening and adhesive bonding can be used.

[0088] Furthermore, the cover 40 in the first embodiment is formed with a plurality of wall recesses 44. However, this is not limitative. For example, the wall recesses 44 may be omitted.

[0089] Furthermore, the bus bar holder 10 in the first embodiment has a circular ring shape. However, the shape is not limited to this. For example, the bus bar holder 10 may have a circular ring shape with a part cut out.

[0090] Furthermore, the configuration of each coil 110 in the first embodiment is not specified. For example, the coil 110 may be formed of a wire wound around the tooth portion 212. In this case, the wire 111 may be connected to the end of the wire, or the end of the wire may serve as the wire 111. Furthermore, the coil 110 may be formed of a block-shaped member. In this case, the wire 111 may be electrically connected to the block-shaped member.

[0091] Furthermore, the shape of the midpoint connection portion 21 in the first embodiment is a hook shape. However, this is not limiting. The shape of the midpoint connection portion 21 can be selected as appropriate. For example, the shape of the midpoint connection portion 21 may be determined based on the method of connecting the midpoint connection portion 21 and the wiring 111. A well-known connection method can be used to connect the midpoint connection portion 21 and the wiring 111. Examples of well-known connection methods include soldering, welding, and screw fastening. The shape of each midpoint connection portion 21 can be selected as appropriate based on various connection methods. Furthermore, for example, the width of each midpoint connection portion 21 may be made larger than the width of other portions. This will, for example, widen the joining area when joining the wiring 111 to the midpoint connection portion 21 by welding, making the joining operation easier.

[0092] Moreover, the lead wire connection portion 32 in the first embodiment is a hole. However, this is not limited thereto. The shape of the lead wire connection portion 32 can be selected as appropriate. For example, the shape of the lead wire connection portion 32 may be determined based on the method of connecting the lead wire connection portion 32 to the lead wire. A well-known connection method can be used to connect the lead wire connection portion 32 to the lead wire. An example of a well-known connection method is a connection method using a screw and a terminal. In this case, the lead wire connection portion 32 is a screw hole, and a lead wire with a terminal attached to its tip is connected to the lead wire terminal 30 by the screw. Furthermore, the lead wire may be directly joined to the lead wire connection portion 32 by welding or the like without molding a special shape. This reduces the manufacturing cost of the lead wire terminal 30.

[0093] Moreover, the wiring connection portion 31 in the first embodiment is a hole. However, this is not limited thereto. The shape of the wiring connection portion 31 can be selected as appropriate. For example, the shape of the wiring connection portion 31 may be determined based on the method of connecting the wiring connection portion 31 to the wiring 111. A well-known connection method can be used to connect the wiring connection portion 31 to the wiring 111. An example of a well-known connection method is a connection method using a screw and a terminal. In this case, the wiring connection portion 31 is a screw hole, and the wiring 111 with a terminal attached to its tip is connected to the lead wire terminal 30 by the screw. Furthermore, the wiring connection portion 31 may be directly joined to the wiring 111 by welding or the like without forming a special shape. This reduces the manufacturing cost of the lead wire terminal 30.

[0094] Furthermore, the lead wire terminals 30 in the first embodiment are arranged on the bus bar holder 10 by inserting the lead wire terminal receiving portions 14 into a pair of grooves that form the lead wire terminal receiving portions 14. However, this is not a limitation. Any appropriate method can be used to arrange the lead wire terminals 30 on the bus bar holder 10. For example, one or more protrusions may be formed as the lead wire terminal receiving portions 14, holes may be formed in the terminal mounting portions 33 into which the protrusions are fitted, and the terminal mounting portions 33 may be arranged on the lead wire terminal receiving portions 14 by fitting the protrusions into the holes. Also, for example, the terminal mounting portions 33 may be bonded to the flat lead wire terminal receiving portions 14 using an adhesive or the like.

[0095] Furthermore, the busbar holder 10 in the first embodiment is formed with a plurality of inner peripheral side walls 16. However, this is not a limitation. The inner peripheral side walls 16 may be arranged in any manner on the inner peripheral edge. For example, they may be formed around the entire inner peripheral edge. Furthermore, for example, they may not be formed on the surface opposite the first surface 10a. Furthermore, even if they are not formed on the inner peripheral edge, they may be formed closer to the inner peripheral edge than each of the wiring fixing portions 11, each of the bulging receiving portions 12, and each of the midpoint busbar receiving portions 13. This prevents the wiring 111 arranged in association with each of the wiring fixing portions 11, each of the bulging receiving portions 12, and each of the midpoint busbar receiving portions 13 from protruding toward the center of the busbar holder 10 beyond the inner peripheral edge. [Explanation of symbols]

[0096] 1 wiring structure, 10 bus bar holder, 10a first surface, 11 wiring fixing portion, 12 bulge receiving portion, 13 midpoint bus bar receiving portion, 14 lead wire terminal receiving portion, 15 cover mounting portion, 16 inner peripheral side wall portion, 17 wiring groove, 20 midpoint bus bar, 21 midpoint connection portion, 22 bulge portion, 30 lead wire terminal, 31 wiring connection portion, 32 lead wire connection portion, 33 terminal mounting portion, 40 cover, 41 through hole, 42 step portion, 43 mounting portion, 43a cover step surface, 44 wall recess, 45 rib, 110 coil, 111 wiring, 200 stator structure, 210 stator body, 211 yoke portion, 212 teeth portion, 213 protruding member, L central axis, LS stator axis.

Claims

1. a busbar holder (10) that is annular or part of an annular shape; a midpoint busbar (20) disposed on the busbar holder (10); A plurality of lead terminals (30); Equipped with The midpoint busbar (20) is formed with one or more midpoint connection portions (21) to which all of the wirings (111) extending from the coil (110) that should be connected to the midpoint busbar (20) are directly connected, Each of the lead wire terminals (30) is formed with a wiring connection portion (31) to which all of the wirings (111) to be connected to the corresponding lead wire terminal (30) are directly connected, A first surface (10a), which is one surface of the bus bar holder (10) along which the wiring (111) is routed to connect to each of the lead wire terminals (30) and the midpoint bus bar (20), is provided with a plurality of wiring fixing portions (11) for fixing each of the wiring (111) to be routed. Wiring structure (1).

2. When an axis passing through the center of the bus bar holder (10) that is annular or a part of annular is defined as a central axis (L), The plurality of wiring fixing portions (11) are protruding portions extending from the first surface (10a) of the bus bar holder (10) along the central axis (L). A wiring structure (1) according to claim 1.

3. When an axis passing through the center of the bus bar holder (10) that is annular or a part of annular is defined as a central axis (L), The bus bar holder (10) has one or more inner peripheral side walls (16) formed along the inner peripheral edge of the bus bar holder (10), The one or more inner peripheral side wall portions (16) are portions extending from the first surface (10a) along the central axis (L). A wiring structure (1) according to claim 1.

4. The shape of the midpoint busbar (20) is C-shaped when viewed along the central axis (L), The bus bar holder (10) is formed with one or more midpoint bus bar receiving portions (13), Each of the midpoint busbar receiving portions (13) is a portion protruding from the first surface (10a) of the busbar holder (10), When the midpoint busbar (20) is placed in the busbar holder (10), the midpoint busbar (20) is arranged to face the midpoint busbar receiving portion (13) and also to face each of the inner peripheral side wall portions (16), thereby fixing the midpoint busbar (20) to the busbar holder (10). A wiring structure (1) according to claim 3.

5. One or more C-shaped bulging portions (22) bulging outward or inward when viewed along the central axis (L) are formed in a part of the midpoint bus bar (20), The bus bar holder (10) has one or more bulging receiving portions (12) formed on the first surface (10a), When the midpoint busbar (20) is placed in the busbar holder (10), the bulge receiving portion (12) and the bulge portion (22) are arranged opposite each other, thereby fixing the midpoint busbar (20) to the busbar holder (10). A wiring structure (1) according to claim 4.

6. The bus bar holder (10) further includes a cover (40) disposed to cover the midpoint bus bar (20), The cover (40) is formed with one or more through holes (41) through which the corresponding lead wire terminals (30) can pass. A wiring structure (1) according to claim 1.

7. The cover (40) is formed with one or more mounting portions (43), The bus bar holder (10) is formed with one or more cover mounting portions (15) connected to each of the mounting portions (43), The corresponding mounting portion (43) and the cover mounting portion (15) are connected to each other, thereby fixing the cover (40) to the bus bar holder (10). A wiring structure (1) according to claim 6.

8. A plurality of wiring grooves (17) into which the wiring (111) can be fitted are formed on the outer peripheral edge of the bus bar holder (10). A wiring structure (1) according to claim 1.

9. Two wiring grooves (17) are formed for the corresponding coils (110). A wiring structure (1) according to claim 8.

10. Each of the midpoint connection portions (21) is a portion of the midpoint busbar (20) bent into a hook shape. A wiring structure (1) according to claim 1.

11. A wiring structure (1) according to claim 1; a stator body (210) in which coils (110) are arranged corresponding to a plurality of teeth (212) protruding radially inward from an annular yoke portion (211); Equipped with Each of the coils (110) is electrically connected to each of the wirings (111), The corresponding wirings (111) are electrically connected to the midpoint bus bars (20). A stator structure (200).

12. Each of the wirings (111) is arranged to run on the first surface (10a) of the bus bar holder (10), The corresponding wirings (111) cross each other. The stator structure (200) of claim 11.

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