Terminal blocks and busbars

Abstract

To enhance positional displacement absorbing performance of a bus bar itself while maintaining sealability.SOLUTION: A terminal stand 30 that is fixed to a device includes a bus bar 40 that is formed into a long shape, and a stand main body 60 that is fixed to the device while holding the bus bar. A portion in the extension direction of the bus bar is a layered bus bar portion 50 formed of a plurality of layered plate members 51, and at least a portion of the remaining portion is a single bus bar portion 54.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a terminal block and a bus bar.

Background Art

[0002] Patent Document 1 discloses a terminal block attached to a cylindrical motor case. The terminal block is used as a base for electrically connecting a three-pole bus bar provided in a three-phase AC motor and a three-pole bus bar provided in an inverter.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When integrating an inverter and a motor, misalignment may occur between the bus bar on the motor side and the bus bar on the inverter side due to assembly tolerances, thermal expansion and contraction, etc. There is a demand for enhancing the performance of absorbing misalignment of the bus bar itself while maintaining the sealing performance.

[0005] Therefore, an object of the present disclosure is to enhance the performance of absorbing misalignment of the bus bar itself while maintaining the sealing performance.

Means for Solving the Problems

[0006] The terminal block of the present disclosure is a terminal block fixed to a device, and includes a bus bar formed in a long shape and a base body fixed to the device while holding the bus bar. A part of the extending direction of the bus bar is a laminated bus bar portion where a plurality of plate materials are laminated, and at least a part of the rest is a single-layer bus bar portion.

[0007] Furthermore, the busbar of this disclosure is a busbar formed in an elongated shape, comprising a laminated busbar section formed by stacking multiple plate materials, and a single-layer busbar section joined to the laminated busbar section. [Effects of the Invention]

[0008] According to this disclosure, it is possible to further improve the displacement absorption performance of the busbar itself while maintaining sealing properties. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic diagram showing an integrated electromechanical unit according to an embodiment. [Figure 2] Figure 2 is a perspective view showing a terminal block. [Figure 3] Figure 3 is a cross-sectional view taken along line III-III in Figure 2. [Figure 4] Figure 4 is an enlarged view of the circled area in Figure 3. [Figure 5] Figure 5 is a perspective view showing the busbar. [Figure 6] Figure 6 is a partially broken perspective view showing a terminal block according to the first modified example. [Figure 7] Figure 7 is a partially broken perspective view showing a terminal block according to the second modified example. [Figure 8] Figure 8 is a partially broken perspective view showing a terminal block according to the third modified example. [Figure 9] Figure 9 is an explanatory diagram showing an example of skiving. [Modes for carrying out the invention]

[0010] [Description of Embodiments in this Disclosure] First, the embodiments of this disclosure will be listed and described.

[0011] The terminal block of this disclosure is as follows:

[0012] (1) A terminal block fixed to a machine, comprising a bus bar formed in a long shape and a base body fixed to the machine while holding the bus bar, wherein a part of the extending direction of the bus bar is a laminated bus bar portion where a plurality of plate materials are laminated, and at least a part of the rest is a single-layer bus bar portion.

[0013] According to the present disclosure, the laminated bus bar portion can be easily bent in the lamination direction. Therefore, this bus bar is excellent in misalignment absorption performance compared to a bus bar formed of a single metal plate. Further, even if liquid penetrates between the plate materials, the liquid is blocked by at least a part of the remaining single-layer bus bar portion in the extending direction of the bus bar. Therefore, the same sealing property as that of a bus bar formed of a single metal plate can be maintained.

[0014] (2) The terminal block according to (1), wherein at least a part of the extending direction of the single-layer bus bar portion may be covered by the base body.

[0015] In this case, since at least a part of the extending direction of the single-layer bus bar portion is covered by the base body, the intrusion of liquid along the outer surface of the single-layer bus bar portion is also suppressed, and the sealing property is further enhanced.

[0016] (3) The terminal block according to (2), wherein a sealant for filling a gap between the single-layer bus bar portion and the base body may be interposed between the single-layer bus bar portion and the base body.

[0017] Thereby, the sealing property between the single-layer bus bar portion and the base body can be further improved by the sealant.

[0018] (4) The terminal block according to (3), wherein a sealing groove is formed on an outer peripheral surface of the single-layer bus bar portion in a direction intersecting with the extending direction of the bus bar, and the sealant may be interposed between the sealing groove and the base body.

[0019] In this case, it becomes difficult for the sealant to be displaced in the extending direction of the bus bar, and the sealing property by the sealant is easily maintained.

[0020] (5) Any one of (1) to (4) terminal block, wherein the stacked busbar portion includes a joint portion joined to the single-layer busbar portion and an extension portion extending from the joint portion, the tip of the extension portion being a connection end, and at least the connection end may protrude from the main body of the block.

[0021] This allows the extension to be easily deformed in the thickness direction when connecting its end to other electrical components. As a result, it offers excellent displacement absorption performance.

[0022] (6)(5) is a terminal block in which the extension portion has a bent portion between the joint portion and the connecting end that bends in such a way that the position of the connecting end relative to the joint portion is changed in the thickness direction of the laminated busbar portion.

[0023] This bend allows the position of the connection end to be adjusted to match the position of other electrical components to which it is connected.

[0024] (7)(5) or (6) terminal block, wherein the connection end may have a screw insertion hole. This allows the connection end to be easily connected to other electrical components by screw.

[0025] (8) A terminal block of any one of (5) to (7), wherein the single-layer busbar portion includes a single-layer joint portion joined to the joint portion and a single-layer extension portion extending from the single-layer joint portion, the tip of the single-layer extension portion being a single-layer connection end, and at least the single-layer connection end may protrude from the main body of the terminal block.

[0026] In this case, the single-layer connection end of the single-layer busbar can be connected to other electrical components. This allows for a simplification of the configuration, for example, on the connection structure side where misalignment absorption performance is not particularly required.

[0027] (9) A terminal block according to any one of (5) to (7), wherein the stacked busbar portion includes a first stacked busbar portion and a second stacked busbar portion, each of the first stacked busbar portion and the second stacked busbar portion having the joint portion and the extension portion, and the joint portion of the first stacked busbar portion and the joint portion of the second stacked busbar portion may be joined to the single-layer busbar portion at different positions from each other.

[0028] This allows for displacement absorption at both the connection end of the first stacked busbar section and the connection end of the second stacked busbar section.

[0029] (10) A terminal block of any one of (5) to (9), wherein the joint between the joint and the single-layer busbar is covered by the main body of the terminal block.

[0030] This makes it easier to maintain the bond between the single-layer busbar section and the laminated busbar section.

[0031] (11) A terminal block of any one of (1) to (10), wherein a single metal material is integrally connected in the thickness direction in the single-layer busbar portion, and in the laminated busbar portion, it is integrally connected with the single-layer busbar portion but separated in the thickness direction.

[0032] This reduces gaps in the single-layer busbar section, improving sealing performance.

[0033] (12)(11) The terminal block, wherein the stacked busbar portion may be a portion in which the plate-like part has been skived.

[0034] This makes it easy to form a laminated busbar section connected to a single-layer busbar section.

[0035] Furthermore, the busbars of this disclosure are as follows:

[0036] (13) A busbar formed in an elongated shape, comprising a laminated busbar section formed by stacking multiple plate materials, and a single-layer busbar section joined to the laminated busbar section.

[0037] According to this disclosure, the laminated busbar portion can be easily bent in the lamination direction. Therefore, this busbar has superior displacement absorption performance compared to a busbar formed from a single metal plate. Furthermore, even if liquid penetrates between the plates, the liquid is blocked by at least the remaining portion of the single-layer busbar in the direction of the busbar's extension. Therefore, it can maintain the same sealing performance as a busbar formed from a single metal plate.

[0038] (14)(13) The busbar may be such that a single metal material is integrally connected in the thickness direction in the single-layer busbar portion, and in the laminated busbar portion, it is integrally connected with the single-layer busbar portion but separated in the thickness direction.

[0039] This reduces gaps in the single-layer busbar section, improving sealing performance.

[0040] (15)(14) The busbar is such that the laminated busbar portion is a portion in which the plate-like portion has been skived.

[0041] This makes it easy to form a laminated busbar section connected to a single-layer busbar section.

[0042] [Details of the embodiments of this disclosure] Specific examples of the terminal blocks and busbars of this disclosure will be described below with reference to the drawings. However, this disclosure is not limited to these examples, and all modifications are intended to be included in the meaning and scope equivalent to the claims as indicated by the claims.

[0043] [Embodiment] The following describes terminal blocks and busbars according to the embodiment. A terminal block is a component fixed to a device and used to electrically connect the device to other electrical equipment. A busbar is a component used to make electrical connections and is a type of wiring component. In this embodiment, an example is described in which the device is a rotating electric machine and the other electrical equipment is an inverter that drives and controls the rotating electric machine. The device and the other electrical equipment are not necessarily required to be a rotating electric machine or an inverter; they may be other devices such as a battery, DC-DC converter, junction box, etc.

[0044] <Overall configuration of the integrated electromechanical unit with a terminal block> For the sake of explanation, the overall configuration of the integrated electromechanical unit, which incorporates a terminal block including a stacked busbar, will be described. Figure 1 is a schematic diagram showing the integrated electromechanical unit 10.

[0045] The electromechanical integrated unit 10 comprises a rotating electric machine 20 and an inverter 12.

[0046] The rotating electric machine 20 is a rotating electric machine comprising a case 22, an armature 24, and a field 28. Figure 1 shows an example in which the armature 24, as a stator, is fixed inside the cylindrical case 22. The field 28 is arranged inside the armature 24 as a rotor. The magnetic field generated by the armature 24 causes the field 28 to rotate, or the rotation of the field 28 causes the armature 24 to generate an electromotive force. In this embodiment, it is assumed that the rotating electric machine 20 is a rotating electric machine that can be used as a three-phase AC motor. In addition to operating as a motor, the rotating electric machine may also be capable of operating as a generator.

[0047] The armature 24 comprises a stator core and a plurality of coil wires. The stator core includes a plurality of teeth, which are arranged to surround the axis of rotation. Each coil wire is wound around one or more teeth. At least some of the plurality of ends of the plurality of coil wires are drawn out from between the plurality of teeth toward one axial end of the armature.

[0048] The armature 24 is provided with coil connection ends 26. The coil connection ends 26 are, for example, elongated conductive plate-shaped portions. The coil connection ends 26 are located on one axial end of the armature 24. Screw insertion holes 26h for screw fastening are formed in the coil connection ends 26. The coil connection ends 26 may be the ends of the coil wires themselves, or they may be metal plates connected to the coil wires by welding, screw fastening, etc. In this embodiment, three coil connection ends 26 corresponding to three phases are arranged in parallel with spacing between them on one end of the armature 24. The coil connection ends 26 are an example of electrical components to which the busbar 40 is connected.

[0049] Furthermore, the inverter 12 is a device that has an inverter circuit. The inverter 12 is expected to be integrated with the rotating electric machine 20. For example, the inverter 12 is integrated with the case 22 of the rotating electric machine 20 by bolting or the like.

[0050] The inverter 12 includes an inverter-side busbar 18 connected to the output terminal of the inverter circuit. The inverter-side busbar 18 is an elongated plate-shaped member formed from a metal plate material such as copper or a copper alloy. Screw insertion holes 18h for screw fastening are formed in the inverter-side busbar 18. In this embodiment, three inverter-side busbars 18 corresponding to three phases extend in parallel from the inverter 12 toward the rotating electric machine 20 at intervals. The inverter-side busbar 18 is an example of an electrical component to which the busbar 40 is connected.

[0051] The terminal block 30 is fixed to the case 22 of the rotating electric machine 20 and is a component that connects the rotating electric machine 20 and the inverter 12. The terminal block 30 is equipped with a busbar 40. The busbar 40 is equipped with a first connection terminal 42 and a second connection terminal 44.

[0052] The first connection end 42 is the end of the busbar 40 that faces outward from the case 22. The first connection end 42 is supported in a position that allows it to be connected to the end of the busbar 18 of the inverter 12, facing outward from the case 22. The first connection end 42 is positioned to overlap with the busbar 18 when the inverter 12 is integrated with the rotating electric machine 20.

[0053] The second connection terminal 44 is the end of the busbar 40 that faces inward into the case 22. The second connection terminal 44 faces inward into the case 22 and is connected to the end of the coil connection terminal 26. With the terminal block 30 fixed to the case 22, the second connection terminal 44 is positioned to overlap with the coil connection terminal 26.

[0054] In this embodiment, three busbars 40 corresponding to three phases are arranged in parallel with a gap between them. The number of busbars 40 is arbitrary.

[0055] When integrating the inverter 12 with the rotating electric machine 20, it is conceivable that the end of the busbar 18 and the first connecting end 42 of the busbar 40 may be misaligned within the assembly tolerance range. Furthermore, with the inverter 12 integrated with the rotating electric machine 20, it is conceivable that the end of the busbar 18 and the first connecting end 42 of the busbar 40 may be misaligned due to thermal expansion and contraction.

[0056] This terminal block 30 can serve to absorb any misalignment between the end of the busbar 18 and the first connection end 42 of the busbar 40.

[0057] Furthermore, sealing may be required both inside and outside the case 22. For example, sealing may be desired to prevent oil inside the case 22 from leaking to the outside via the busbar 40. Also, sealing may be desired to prevent water from outside the case 22 from entering the case 22 via the busbar 40. This terminal block 30 can play a role in suppressing the leakage or ingress of liquids that travel along the busbar 40.

[0058] Furthermore, within the assembly tolerance range, the coil connection end 26 may be positioned off-center from its predetermined position. Also, due to thermal expansion and contraction, the coil connection end 26 may be positioned off-center from its predetermined position. As a result, the coil connection end 26 and the second connection end 44 of the busbar 40 may be misaligned.

[0059] In addition to absorbing the misalignment between the end of the busbar 18 and the first connection end 42 of the busbar 40, the terminal block 30 may also absorb the misalignment between the coil connection end 26 and the second connection end 44 of the busbar 40. In a later second modification, an example in which the terminal block 30 absorbs the misalignment between the coil connection end 26 and the second connection end 44 of the busbar 40 will be described.

[0060] <About terminal blocks> The terminal block 30 will be explained in more detail. Figure 2 is a perspective view showing the terminal block 30. Figure 3 is a cross-sectional view taken along line III-III in Figure 2. Figure 2 shows the terminal block 30 removed from the case 22. Figure 3 shows the terminal block 30 fixed to the case 22. In Figures 2 and 3, the case 22 is partially shown. Figure 4 is an enlarged view of the circled area in Figure 3. Figure 5 is a perspective view showing the busbar 40.

[0061] The terminal block 30 comprises a busbar 40 and a block body 60.

[0062] The busbar 40 is a conductive component formed in an elongated shape. One end of the busbar 40 is the first connection terminal 42, and the other end of the busbar 40 is the second connection terminal 44.

[0063] A screw insertion hole 42h is formed in the first connecting end 42. With the end of the busbar 18 overlapping the first connecting end 42, the screw S is inserted through the screw insertion holes 18h and 42h. The screw S is then screwed into the nut N. As a result, the first connecting end 42 and the end of the busbar 18 are sandwiched between the head of the screw S and the nut N, and are fixed in an electrically connected state.

[0064] The screw insertion hole 42h is preferably larger than the diameter of the screw shaft portion of the screw S. In the direction along the overlapping surface of the first connecting end 42 and the end of the busbar 18, the screw insertion hole 42h should be set to be larger than the diameter of the screw shaft portion of the screw S, within a range that can absorb the misalignment between the first connecting end 42 and the end of the busbar 18 within the tolerance range. The above misalignment can also be absorbed if the screw insertion hole 18h is larger than the diameter of the screw shaft portion of the screw S. For this reason, the size of the screw insertion hole 42h should be set taking into consideration the size of the screw insertion hole 18h.

[0065] A screw insertion hole 44h is formed in the second connection end 44. With the coil connection end 26 superimposed on the second connection end 44, the screw S is inserted through the screw insertion holes 26h and 44h. Then, the screw S is screwed into the nut N. As a result, the second connection end 44 and the coil connection end 26 are sandwiched between the head of the screw S and the nut N, and are fixed in an electrically connected state.

[0066] The screw insertion hole 44h is preferably larger than the diameter of the screw shaft portion of the screw S. In the direction along the overlapping surface of the second connecting end 44 and the coil connecting end 26, the screw insertion hole 44h should be set to be larger than the diameter of the screw shaft portion of the screw S, within a range that can absorb the misalignment between the second connecting end 44 and the coil connecting end 26 within the tolerance range. The misalignment can also be absorbed if the screw insertion hole 26h is larger than the diameter of the screw shaft portion of the screw S. For this reason, the size of the screw insertion hole 44h should be set taking into consideration the size of the screw insertion hole 26h.

[0067] In this embodiment, the terminal block 30 includes three busbars 40. The terminal block 30 only needs to include at least one busbar.

[0068] A portion of the busbar 40 in the direction of extension is a laminated busbar portion 50, and at least a portion of the remaining portion is a single-layer busbar portion 54. In this embodiment, the portion of the busbar 40 closer to the first connection end 42 is the laminated busbar portion 50, and the portion of the busbar 40 from the center in the direction of extension closer to the second connection end 44 is the single-layer busbar portion 54. The laminated busbar portion 50 and the single-layer busbar portion 54 are joined together in a position closer to the first connection end 42 than to the center in the direction of extension of the busbar 40.

[0069] The laminated busbar section 50 is a portion formed by laminating multiple plate materials 51. Each plate material 51 is thinner than the overall thickness of the laminated busbar section 50 and thinner than the thickness of the single-layer busbar section 54. The plate material 51 is made of metal plates such as copper, copper alloy, aluminum, or aluminum alloy. The plate material 51 is formed in an elongated plate shape. The laminated busbar section 50 is formed by overlapping multiple plate materials 51 with their extending directions aligned, and therefore the laminated busbar section 50 is also formed in an elongated plate shape.

[0070] More specifically, the laminated busbar section 50 is formed in a rectangular shape that is elongated in one direction. It is also conceivable that the ends of the laminated busbar section 50 are formed in a rounded shape. In this embodiment, two plates 51 are stacked on top of each other. Three or more plates may be stacked on top of each other.

[0071] The laminated busbar section 50 includes a joint section 52 and an extension section 53. The joint section 52 is the portion that is superimposed and joined to the single-layer busbar section 54.

[0072] The extension portion 53 is the part that extends from the joint portion 52. In this embodiment, the extension portion 53 extends in the opposite direction to the extension direction of the single-layer busbar portion 54. In other words, the joint portion 52 of the laminated busbar portion 50 is joined to the single-layer busbar portion 54, and the laminated busbar portion 50 and the single-layer busbar portion 54 extend in a straight line.

[0073] The tip of the extension portion 53 is the first connecting end 42. As described above, a screw insertion hole 42h is formed in the first connecting end 42. For example, each of the plate materials 51 has a hole formed in it for forming the screw insertion hole 42h. When multiple plate materials 51 are stacked on top of each other, the holes in the plate materials overlap to form the screw insertion hole 42h.

[0074] As will be explained later, when the laminated busbar section 50 deforms in the lamination direction, it is expected that the position of the holes will shift between the laminated plate materials 51. To ensure that the screw S can be inserted into the screw insertion hole 42h even if the position of the hole shifts, it is preferable that the hole is larger than the diameter of the screw S.

[0075] The thickness and width of the laminated busbar section 50, the thickness and width of the plate material 51, and the number of plate materials are arbitrary. These thicknesses, widths, and numbers are set considering the allowable current value required for the busbar 40, ease of deformation, and processability.

[0076] It is not essential that the multiple plate materials 51 are formed in the same shape. For example, the laminated busbar may be formed by laminating multiple plate materials having different thicknesses. Alternatively, holes of different shapes may be formed in the multiple plate materials 51, and the screw insertion holes 42h may be formed by the common opening portion of these multiple holes.

[0077] In at least a portion of the laminated busbar section 50, multiple plate materials 51 are laminated in a manner that allows for relative displacement. The statement that multiple plate materials 51 are laminated in a manner that allows for relative displacement means that adjacent plate materials 51 are not joined to each other, and therefore, each plate material 51 can bend in the thickness direction (the lamination direction of the laminated busbar section 50) by rubbing against adjacent plate materials 51.

[0078] In this embodiment, in the region of the laminated busbar section 50 excluding the joint section 52, i.e., in the extended section 53, multiple plate materials 51 are laminated in a state that allows for relative positional displacement. Therefore, the laminated busbar section 50 is a region that extends from the single-layer busbar section 54 and can be bent more easily in the thickness direction than the single-layer busbar section 54.

[0079] The single-layer busbar section 54 is not made by joining multiple plate materials, but rather is a single-layer structure in which the same material is continuous in the thickness direction. The single-layer busbar section 54 is made of, for example, a single metal plate. The metal plate is, for example, a metal plate made of copper, copper alloy, aluminum, aluminum alloy, etc.

[0080] The single-layer busbar section 54 is formed in an elongated shape, more specifically, in a rectangular shape that is long in one direction. In this embodiment, the single-layer busbar section 54 includes a single-layer joint section 55 and a single-layer extension section 56.

[0081] The single-layer joint 55 is the portion that is superimposed and joined to the laminated busbar portion 50.

[0082] In this embodiment, the joint portion 52 and the single-layer joint portion 55 are configured to be press-formed in such a way as to maintain the joined state.

[0083] In this embodiment, a protrusion 52a projecting in the thickness direction is formed on one of the joint portion 52 and the single-layer joint portion 55, and a recess 55a recessed in the thickness direction is formed on the other. The joint portion 52 and the single-layer joint portion 55 are joined together by the protrusion 52a fitting into the recess 55a.

[0084] Such a joint structure is formed, for example, by press-forming the joint portion 52 and the single-layer joint portion 55 while they are overlapping. Such a joint structure may be, for example, a structure called a crimp joint, a structure called a TOX(trademark) crimp, or a structure called a mechanical clinch.

[0085] At the joint 52, the multiple plate materials 51 are also press-formed to maintain their joined state. Here, a protrusion formed on one of the plate materials 51 fits into a recess formed on the adjacent plate material, thereby fixing the plate materials 51 in a stacked state.

[0086] In other words, in this embodiment, multiple sheet materials 51 and single-layer joint portions 55 are joined together by pressing them together while they are stacked on top of each other, thereby joining the multiple sheet materials 51 and the single-layer joint portions 55. Therefore, since the stacked state of the sheet materials 51 and the joining of the joint portions 52 and single-layer joint portions 55 are achieved in the same process, the busbar 40 can be easily manufactured.

[0087] The joint portion 52 and the single-layer joint portion 55 only need to be joined electrically and mechanically, and are not limited to the above example; they may be joined by any configuration. For example, the joint portion and the single-layer joint portion may be joined by welding or screw fastening. Similarly, the plate materials 51 may also only need to be joined electrically and mechanically, and are not limited to the above example; they may be joined by any configuration. For example, the plate materials may be joined by welding or screw fastening. Furthermore, the joining of the joint portion and the single-layer joint portion and the joining of the plate materials do not need to be achieved with the same joining structure. For example, the plate materials may be joined by welding, and the joint portion and the single-layer joint portion may be joined by riveting or screw fastening.

[0088] In the following explanation, the joint 52 and the single-layer joint 55 are referred to as the joint 52P. For example, the joint 52P is the location where the convex portion 52a fits into the concave portion 55a to create an electrically-mechanical joint.

[0089] The single-layer extension 56 is the portion that extends from the single-layer joint 55. In this embodiment, the single-layer extension 56 extends to the opposite side from the extension 53.

[0090] The tip of the single-layer extension 56 is the second connecting end 44, and the second connecting end is an example of a single-layer connecting end. As described above, a screw insertion hole 44h is formed in the second connecting end 44.

[0091] A sealing groove 54g is formed on the outer circumferential surface of the single-layer busbar portion 54, extending in a direction intersecting the extending direction of the busbar 40. The portion of the single-layer busbar portion 54 in which the sealing groove 54g is formed is the portion covered by the base body 60. In this embodiment, the sealing groove 54g is formed on both sides of the portion of the single-layer extension portion 56 between the single-layer joint portion 55 and the second connecting end 44. On each surface, multiple (four in this case) sealing grooves 54g are formed at intervals along the extending direction of the busbar 40. Each sealing groove 54g extends in a direction perpendicular to the extending direction of the busbar 40.

[0092] It is not essential that the sealing groove 54g has the above configuration. At least one sealing groove is sufficient. The sealing groove may extend diagonally with respect to the direction of extension of the busbar. The sealing groove may be formed on the side of the busbar.

[0093] In this embodiment, a partially recessed recess 54g2 is formed in the region on both sides of the busbar 40 that includes the area where multiple sealing grooves 54g are formed.

[0094] The thickness and width of the single-layer busbar section 54 are arbitrary. These thicknesses and widths are set considering the allowable current values ​​and other factors required for the busbar 40.

[0095] In the busbar 40, the length of the laminated busbar section 50 and the length of the single-layer busbar section 54 are arbitrary. The longer the laminated busbar section 50, the easier it is to bend in the lamination direction. Also, the longer the single-layer busbar section 54, the larger the area in which leakage or intrusion of liquid transmitted between the plate materials 51 can be suppressed can be made. The lengths of the laminated busbar section 50 and the single-layer busbar section 54 can be set according to the desired displacement absorption performance and sealing performance.

[0096] The base body 60 is the part that is fixed to the rotating electric machine 20, which is an example of equipment, while holding the busbar 40. Here, a mounting hole 22h1 is formed in the case 22 of the rotating electric machine 20. The mounting hole 22h1 is a hole that penetrates from the inside to the outside of the case 22. In this embodiment, the mounting hole 22h1 is an elongated through hole. A flat portion is formed in the case 22, and the mounting hole 22h1 is formed in this flat portion. Screw holes 22h2 are formed around the outer edge of the mounting hole 22h1 in the flat portion. In this embodiment, screw holes 22h2 are formed on both outer sides in the longitudinal direction of the mounting hole 22h1 in the case 22. With a part of the base body 60 inserted into the mounting hole 22h1, the base body 60 is screwed and fixed to the case 22 using the screw holes 22h2.

[0097] The base body 60 is assumed to be an insulator such as resin. The resin forming the base body 60 is, for example, polyamide 6T (PA6T), polyphenylene sulfide (PPS), or polybutylene terephthalate (PBT), with PA6T being more preferred. If the rotating electric machine 20 is oil-cooled, the resin forming the base body 60 is preferably PA6T or PPS. If the rotating electric machine 20 is water-cooled, the resin forming the base body 60 may be PBT. The multiple busbars 40 are supported in a fixed position relative to the rotating electric machine 20 by the base body 60.

[0098] The base body 60 comprises a holding body 62, a screw fastening part 64, extension holding parts 66 and 67, and a partition part 68.

[0099] The retaining body 62 is shaped to close the outer opening of the mounting hole 22h1 and to cover the peripheral edge of the outer opening of the mounting hole 22h1. In this case, it is formed as a rectangular plate that extends larger than the outer opening of the mounting hole 22h1.

[0100] The screw-fastening portion 64 is a portion that protrudes from the outer circumference of the holding body 62. In this embodiment, the base body 60 includes two screw-fastening portions 64. The two screw-fastening portions 64 protrude outward from both longitudinal ends of the holding body 62. Screw insertion holes 64h are formed in the screw-fastening portions 64.

[0101] With the retaining body 62 covering the outer opening of the mounting hole 22h1, the retaining body 62 can contact the outer surface of the case 22 around the mounting hole 22h1. In this state, a pair of screw fastening parts 64 are positioned on a pair of screw holes 22h2. The base body 60 is fixed to the case 22 by inserting the screws S through the screw insertion holes 64h and screwing them into the screw holes 22h2 of the case 22.

[0102] In this state, the retaining body 62 is pressed against the outer surface of the case 22 around the mounting hole 22h1, sealing the space between the base body 60 and the case 22. Preferably, an annular seal made of rubber or the like may be interposed between the base body 60 and the case 22. Alternatively, the base body 60 may have an insertion portion that is inserted into the mounting hole 22h1, and an annular seal may be interposed between the insertion portion and the mounting hole 22h1. In this case, the annular seal further improves the sealing performance between the mounting hole and the base body.

[0103] The busbar 40 is held by the retaining body 62 so as to penetrate both the inside and outside of the case 22. In this embodiment, multiple (3) busbars 40 are held by the retaining body 62 in a spaced-out parallel configuration. The multiple (3) busbars 40 are kept insulated from each other by the retaining body 62.

[0104] The middle portion of the busbar 40 in the direction of extension is embedded within the retaining body 62. The portion of the stacked busbar 50 on the side of the first connection end 42 protrudes from the retaining body 62 to the outside of the case 22. The portion of the busbar 40 on the side of the second connection end 44 protrudes from the retaining body 62 to the inside of the case 22.

[0105] With the base body 60 fixed to the case 22 as described above, the first connection end 42 of the busbar 40 is positioned so that it can be superimposed on the busbar 18. Also, the second connection end 44 of the busbar 40 is positioned so that it can be superimposed on the coil connection end 26.

[0106] The extension retaining portion 66 protrudes from the base body 60 to the outside of the case 22, partially covering each busbar 40. Therefore, the portion of the busbar 40 closer to the first connection end 42 is exposed from the base body 60 at the tip end of the extension retaining portion 66.

[0107] The extension retaining portion 67 protrudes from the base body 60 into the case 22, partially covering each busbar 40. Therefore, the portion of the busbar 40 closer to the second connection end 44 is exposed from the base body 60 at the tip end of the extension retaining portion 67.

[0108] The partition portion 68 is a plate-like portion that extends in a direction perpendicular to the direction in which the multiple busbars 40 are aligned, inside the case 22 beyond the base body 60 and between each busbar 40. The partition portion 68 extends further inside the case 22 than the extension holding portion 67. Such a partition portion 68 can partition the portion of each busbar 40 closer to the second connection end 44.

[0109] The extension retaining parts 66 and 67 may be omitted. The partition part 68 may be omitted.

[0110] The relationship between the laminated busbar section 50 and the single-layer busbar section 54 in the busbar 40 will be explained.

[0111] First, at least a portion of the single-layer busbar portion 54 in its extending direction is covered by the base body 60. More specifically, the portion of the single-layer extension portion 56 of the single-layer busbar portion 54 closer to the single-layer joint portion 55 is covered by the base body 60. In particular, the portion of the single-layer extension portion 56 in which the sealing groove 54g is formed is covered by the base body 60.

[0112] In this embodiment, the end of the single-layer joint 55 is exposed from the extension holding portion 66 of the base body 60. The end of the single-layer joint 55 may be covered by the base body 60.

[0113] The first connecting end 42, located at the end of the stacked busbar section 50, protrudes from the base body 60, more specifically from the extension holding portion 66. In this embodiment, at least a portion of the joint portion 52 of the stacked busbar section 50 is covered by the extension holding portion 66 of the base body 60. Extension part 53 The extension portion 53 extends from the joint portion 52 and further protrudes from the tip of the extension holding portion 66. As a result, the first connecting end 42 at the tip of the extension portion 53 protrudes from the extension holding portion 66 of the base body 60.

[0114] Furthermore, the joint portion 52P between the joint portion 52 and the single-layer joint portion 55 is covered by the base body 60. In this embodiment, the joint portion 52P is covered by the extension holding portion 66 of the base body 60. In this embodiment, since the joint portion 52P protrudes partially from the single-layer joint portion 55, the extension holding portion 66 has a partial projection 66P that protrudes partially at the joint portion 52P. The joint portion 52P is covered by the partial projection 66P. This makes it possible to cover the partially protruding joint portion 52P while keeping the extension holding portion 66 as thin as possible.

[0115] The second connecting end 44, located at the tip of the single-layer busbar section 54, protrudes from the base body 60, more specifically from the extension holding section 67. In this embodiment, at least a portion of the single-layer joint section 55 of the single-layer busbar section 54 is covered by the extension holding section 66 of the base body 60, and the single-layer extension 56 extends from the single-layer joint section 55, passes through the holding body 62 and the extension holding section 67, and protrudes from the tip of the extension holding section 67. As a result, the second connecting end 44 at the tip of the single-layer extension 56 protrudes from the extension holding section 67 of the base body 60.

[0116] It is preferable that a sealant 70 is interposed between the single-layer busbar portion 54 and the base body 60 to fill the gap between the single-layer busbar portion 54 and the base body 60. The sealant 70 does not need to be present over the entire portion of the single-layer busbar portion 54 that is covered by the base body 60, but only needs to be interposed between at least a portion of the single-layer busbar portion 54 that is covered by the base body 60 and the base body 60. In this case, the sealant 70 is interposed between the single-layer busbar portion 54 and the extension holding portion 67.

[0117] The sealant 70 is interposed between the single-layer busbar section 54 and the base body 60, and serves to block the passage through which liquid can enter between the single-layer busbar section 54 and the base body 60. For example, an elastic adhesive can be used as the sealant 70, such as an epichlorohydrin rubber adhesive.

[0118] In this embodiment, the sealing groove 54g is formed in the single-layer busbar portion 54, and the sealant 70 is interposed between the sealing groove 54g and the base body 60. In other words, the sealant 70 is interposed between the single-layer busbar portion 54 and the base body 60 while filling at least a portion of the sealing groove 54g. In this embodiment, the sealant 70 is also filled in the recesses 54g2 formed on both sides of the single-layer busbar portion 54, and is interposed between the single-layer busbar portion 54 and the base body 60. Therefore, the sealant 70 can easily be interposed between the single-layer busbar portion 54 and the base body 60 while surrounding the entire perimeter of the single-layer busbar portion 54.

[0119] The terminal block 30 is manufactured, for example, as follows: The ends of multiple plate materials 51 constituting the laminated busbar section 50 are overlapped onto the single-layer joint 55 of the single-layer busbar section 54. Then, the single-layer joint 55 and the ends of the multiple plate materials 51 are pressed or otherwise processed. As a result, the multiple plate materials 51 are joined by the joint 52 and held in an overlapping state. In addition, the joint 52 of the laminated busbar section 50 and the single-layer joint 55 of the single-layer busbar section 54 are joined, and the laminated busbar section 50 and the single-layer busbar section 54 are connected in a linear manner.

[0120] Then, sealant 70 is applied around the portion of the single-layer busbar section 54 in which the sealing groove 54g is formed.

[0121] The busbar 40 is set in a mold for molding the base body 60. Molten resin for forming the base body 60 is poured into the mold, and the base body 60 is molded using the busbar 40 as an insert. This produces a terminal block 30 in which the extended middle portion of the busbar 40 is embedded in the base body 60 as an insert portion. A metal collar may be embedded in the screw insertion hole 64h.

[0122] Unlike the above manufacturing method, the terminal block 30 may be manufactured by first molding a base body 60 having a through hole into which the busbar 40 can be inserted, and then inserting the busbar 40 into the through hole.

[0123] An example of connecting the rotating electric machine 20 and the inverter 12 using the terminal block 30 described above will be explained.

[0124] First, regarding the rotating electric machine 20, the armature 24 and the like are assembled inside the case 22, and the coil connection end 26 is positioned in a predetermined location inside the case 22. In this state, the base body 60 is positioned to cover the mounting hole 22h1 of the case 22. In this state, the second connection end 44 is positioned to overlap with the coil connection end 26. Then, with the second connection end 44 and the coil connection end 26 overlapping so as to be in surface contact, they are fixed in place with screws.

[0125] Before and after the second connection end 44 and the coil connection end 26 are screw-fastened together, the base body 60 is screw-fastened to the case 22.

[0126] The first connection end 42 of the stacked busbar section 50 protrudes from the outside of the terminal block 30 fixed to the case 22. The inverter 12 is positioned on the rotating electric machine 20, with the end of the busbar 18 positioned to overlap with the first connection end 42. However, the position of at least one of the first connection end 42 and the end of the busbar 18 may deviate from the predetermined design position in the stacking direction of the stacked busbar section 50 (see arrow P1 in Figure 3). In such a case, the portion of the stacked busbar section 50 closer to the first connection end 42 can be easily bent in the stacking direction according to the position of the end of the busbar 18 (see arrow P2 in Figure 3). This allows the first connection end 42 and the end of the busbar 18 to be stacked and in surface contact with each other, and then screwed together.

[0127] In this case, the position of at least one of the first connecting end 42 and the end of the busbar 18 may be shifted from the predetermined design position in a direction perpendicular to the stacking direction of the stacked busbar section 50 (see arrow P3 in Figure 3). To prepare for such cases, for example, at least one of the screw insertion holes 42h and 18h ​​may be made larger than the diameter of the screw shaft of the screw S. In this case, the first connecting end 42 and the end of the busbar 18 can be screwed together with the screw S inserted into the screw insertion hole 42h or 18h at an off-center position depending on the amount of displacement.

[0128] The order in which the first connecting end 42 and the second connecting end 44 are secured with screws is arbitrary.

[0129] Even after the inverter 12 is integrated with the rotating electric machine 20, positional misalignment between the first connection end 42 and the end of the busbar 18 may occur or become larger due to thermal expansion and contraction. In such cases, the portion of the laminated busbar section 50 closer to the first connection end 42 can easily deform in the lamination direction, thereby accommodating this positional misalignment.

[0130] In a configuration where the inverter 12 is integrated with the rotating electric machine 20, it may be desirable to suppress the passage of liquid between the inside and outside of the rotating electric machine 20. For example, if the rotating electric machine 20 is oil-cooled, oil is present inside the case 22. It is also required that the terminal block 30 prevent oil from leaking outside the rotating electric machine 20.

[0131] In the laminated busbar section 50 of this busbar 40, since the plate material 51 is stacked on top of each other, minute gaps may occur between the plate material 51. However, the portion of the busbar 40 that is embedded in the base body 60 includes a single-layer busbar section 54. Therefore, the passage of liquid passing through the busbar 40 is blocked by this single-layer busbar section 54.

[0132] Furthermore, a small gap may form between the busbar 40 and the base body 60.

[0133] Furthermore, a minute gap may occur between the outer surface of the busbar 40 and the base body 60. However, because the sealant 70 is interposed between the single-layer busbar portion 54 and the base body 60, the passage of liquid between the outer surface of the busbar 40 and the base body 60 is suppressed. In particular, because the sealant 70 is interposed between the sealing groove 54g and the base body 60, the sealant 70 is less likely to shift position from the outer surface of the busbar 40, and the state in which the sealant 70 is interposed between the outer surface of the busbar 40 and the base body 60 is more reliably maintained. As a result, the space between the outer surface of the busbar 40 and the base body 60 is more reliably sealed by the sealant 70.

[0134] Therefore, oil leakage from the case 22 is suppressed in the terminal block 30.

[0135] Furthermore, even if the rotating electric machine 20 is not oil-cooled, it is sealed to prevent liquids such as water from passing through the terminal block 30.

[0136] <Effects, etc.> As described above, the terminal block 30 and busbar 40 allow the laminated busbar portion 50 to be easily bent in the lamination direction. Therefore, the busbar 40 has superior displacement absorption performance compared to a busbar of the same thickness formed from a single metal plate. Furthermore, even if liquid penetrates between the plate materials 51, the liquid is blocked by at least a portion of the remaining single-layer busbar portion 54 in the extending direction of the busbar 40. Therefore, liquid is less likely to spread compared to a laminated busbar where plate materials are laminated along the entire extending direction. As a result, it is possible to maintain the same sealing performance as a busbar formed from a single metal plate. Thus, the displacement absorption performance of the busbar 40 itself can be further enhanced while maintaining sealing performance.

[0137] Furthermore, the portion of the laminated busbar section 50 that extends from the terminal block 30 is bent in the thickness direction throughout, absorbing misalignment, which makes it less likely for stress concentration to occur in the busbar 40 and the base body 60. As a result, it is less likely for the busbar 40 and the base body 60 to break.

[0138] Furthermore, as described above, because the laminated busbar section 50 deforms, misalignment is less likely to generate forces that displace or deform the terminal block 30 relative to the case 22. As a result, the sealing performance between the base body 60 and the case 22 is less likely to deteriorate.

[0139] Furthermore, since at least a portion of the single-layer busbar section 54 is covered by the base body 60, the intrusion of liquid that travels along the outer surface of the single-layer busbar section 54 is suppressed, and the sealing performance is further enhanced.

[0140] Furthermore, the sealing agent 70 interposed between the single-layer busbar section 54 and the base body 60 can further improve the sealing performance between the single-layer busbar section 54 and the base body 60.

[0141] Furthermore, since the sealant 70 is interposed between the sealing groove 54g and the base body 60, the sealant 70 is less likely to shift position along the extending direction of the busbar 40, Sealant 70 This allows the single-layer busbar section 54 to be interposed between the base body 60 in a stable position. This makes it easier to maintain the sealing performance provided by the sealant 70.

[0142] Furthermore, since the first connecting end 42, located at the tip of the extension 53 of the laminated busbar section 50, extends from the base body 60, the extension 53 can be deformed in the thickness direction when connecting the first connecting end 42 to the busbar 18. As a result, the portion close to the first connecting end 42 can be deformed, resulting in excellent displacement absorption performance.

[0143] Furthermore, since a screw insertion hole 42h is formed in the first connection end 42, the first connection end 42 can be easily connected to the busbar 18 by a screw S.

[0144] Furthermore, since the second connecting end 44, located at the tip of the single-layer extension 56 of the single-layer busbar section 54, extends from the base body 60, the second connecting end 44 can be connected to the coil connecting end 26. For example, if the coil connecting end 26 is easily deformable and position adjustment is not required on the second connecting end 44 side, or if the coil connecting end 26 and the second connecting end 44 can be accurately positioned, the configuration on the second connecting end 44 side can be simplified.

[0145] Furthermore, since the joint 52P between the joint 52 and the single-layer joint 55 is covered by the base body 60, the joint 52P is also reinforced by the base body 60. This makes it easier to maintain the joint state between the single-layer busbar section 54 and the laminated busbar section 50.

[0146] [Differentiation] Figure 6 is a partially broken perspective view showing a terminal block 130 according to the first modified example. In the above embodiment, an example is shown in which the laminated busbar portion 50 extends without bending in the thickness direction.

[0147] In the first modified example, busbar 140 corresponds to busbar 40. The laminated busbar section 150, which corresponds to the laminated busbar section 50, has an extension section 153, which corresponds to the extension section 53. The extension section 153 has a bent section 153V. The bent section 153V is bent between the joint section 52 and the first connecting end 42 in such a way that the position of the first connecting end 42 relative to the joint section 52 is changed in the thickness direction of the laminated busbar section 150. More specifically, the bent section 153V has a bent point 153Va close to the joint section 52 and a bent point 153Vb close to the first connecting end 42. The bent point 153Va is bent from one surface of the single-layer joint section 55 toward the extension of the single-layer joint section 55. 153Vb The bending point in question 153Vb The portion closer to the tip is bent in the opposite direction to the bend 153Va so that it is positioned along the extension of the single-layer joint 55. In other words, the bend 153V is bent in a crank shape, including bends that are bent in opposite directions.

[0148] This allows for easy adjustment of the position of the first connection end 42 in the thickness direction of the busbar 140. The position of the first connection end 42 can be adjusted to match the position of the busbar 18 to which it is connected.

[0149] In this embodiment, the first connection terminal 42 is positioned close to the single-layer busbar section 54, in this case, at the same position as the single-layer busbar section 54.

[0150] For example, when designing the electromechanical integrated unit 10, it is assumed that the busbar 18 is positioned so that it can be superimposed on a single-layer busbar portion held by a terminal block, assuming a busbar made from a single metal plate. According to this modified example, since the first connection end 42 is positioned close to the single-layer busbar portion 54 in the thickness direction of the busbar 140, connection to the busbar 18 set as described above can be easily made.

[0151] Figure 7 is a partially broken perspective view showing a terminal block 230 according to a second modified example. In the above embodiment, an example is shown in which one end of the busbar 40 is a laminated busbar portion 50 and the other end is a single-layer busbar portion 54.

[0152] In the second modified example, an example is shown in which one end of the busbar 240 corresponding to the busbar 40 is the first laminated busbar section 150 and the other end is the second laminated busbar section 250.

[0153] In other words, in the second modified example, the busbar 240 includes a first laminated busbar section 150 and a second laminated busbar section 250 as a laminated busbar section.

[0154] The first stacked busbar section 150 is First variation This is the laminated busbar section 150 described above, and it has a joint section 52 and an extension section 153.

[0155] The second laminated busbar section 250, like the laminated busbar section 150, has a joint section 252 corresponding to the joint section 52 and an extension section 253 corresponding to the extension section 153. The tip of the extension section 253 is the second connecting end 44.

[0156] The joint 52 of the first laminated busbar section 150 and the joint 252 of the second laminated busbar section 250 are joined to the single-layer busbar section 254 at different positions.

[0157] The single-layer busbar section 254 is a busbar formed from a single metal plate. The difference between the single-layer busbar section 254 and the single-layer busbar section 54 is that both ends of the single-layer busbar section 254 have single-layer joints 255 that correspond to the single-layer joints 55.

[0158] The joint 52 of the first laminated busbar section 150 is joined to the single-layer joint 255 at one end, and the joint 252 of the second laminated busbar section 250 is joined to the single-layer joint 255 at the other end. The first laminated busbar section 150 and the second laminated busbar section 250 extend in opposite directions from each other. Except for the fact that the first laminated busbar section 150 and the second laminated busbar section 250 extend in opposite directions from each other to the base body 60, the relationship of the second laminated busbar section 250 to the base body 60 is the same as the relationship of the first laminated busbar section 150 to the base body 60.

[0159] According to this second modification, the misalignment absorption performance of the first connection end 42 and the second connection end 44 at both ends of the busbar 240 can be improved. For example, when it is difficult to adjust the position of the coil connection end 26 within the case 22, the position of the second connection end 44 can be adjusted.

[0160] Furthermore, by making one end and the other end of the busbar 240 symmetrical, it can be integrated with the base body 60 regardless of the direction of extension of the busbar 240, thus simplifying manufacturing. Also, since the first laminated busbar section 150 and the second laminated busbar section 250 can be made the same shape, the number of types of manufactured parts can be reduced, and the single-layer joint section 255 , two first laminated busbar sections 150 and second laminated busbar section 250 Since there is no need to distinguish the mounting position for each component, manufacturing is also easier in this respect.

[0161] In the above embodiment 1, the first connection end outside the case may be a single-layer busbar, and the second connection end inside the case may be a laminated busbar.

[0162] Furthermore, in Embodiment 1 and its various modifications, examples were shown in which the laminated busbar sections 50, 150, and 250 are arranged on one main surface side of the single-layer busbar sections 54 and 254. However, the multiple plate materials constituting the laminated busbar sections 50, 150, and 250 may be divided and arranged on both sides of the single-layer busbar sections 54 and 254. In this case, each plate material may be bent appropriately in the thickness direction and overlapped at the connecting ends.

[0163] In the above embodiment 1 and its various modifications, an example was described in which the laminated busbar sections 50, 150, and 250 are joined to the single-layer busbar sections 54 and 254. As shown in the terminal block 330 and busbar 340 in the third modification shown in Figure 8, the single-layer busbar section 354 and the laminated busbar section 350 may be formed by integrally connecting a single metal material. Here, being formed by integrally connecting a single metal material means that a solid metal material is subjected to metal forming processes such as rolling, pressing, cutting, or slicing, and is processed without being divided into multiple parts; in other words, it is formed without separate parts being joined together.

[0164] Therefore, in the single-layer busbar section 354, a single metal material is formed so that it is integrally connected in the thickness direction. It is assumed that in the single-layer busbar section 354, there are no joint marks left where multiple plate materials were joined by welding or the like. In the single-layer busbar section 354, the metal material is solidified without any gaps, so water penetration into the single-layer busbar section 354 is suppressed.

[0165] In the laminated busbar section 350, it is separated into multiple sections in the thickness direction. In other words, in the laminated busbar section 350, multiple plate-like sections 351 are stacked. The base end of each plate-like section 351 is integrally connected to one of the ends of the single-layer busbar section 354. Therefore, there is no joint between the laminated busbar section 350 and the single-layer busbar section 354. For example, the outward-facing surface of the outermost plate-like section 351 among the multiple plate-like sections 351 and the outward-facing surface of the single-layer busbar section 354 are flush and continuous. A gap exists between the outward-facing surfaces of the two outermost plate-like sections 351 among the multiple plate-like sections 351, separating the plate-like sections 351. Therefore, in the laminated busbar section 350, each plate-like section 351 is stacked in a state where it can be shifted relative to another.

[0166] The laminated busbar section 350 may be, for example, a portion of the plate material 400 that has been skived, as shown in Figure 9. Skiving is a process of cutting the surface of a metal material in a way that thinly peels off the surface. For example, a metal plate material 400 is prepared to serve as the base material for forming the single-layer busbar section 354 and the laminated busbar section 350. The surface of the end portion of the plate material 400 that will form the laminated busbar section 350 is then cut using a cutting blade 410 to peel off the surface. The portion that will form the single-layer busbar section 354 is left as a single-layer plate without being skived. The skived portion becomes a plate-like portion 351 and is stacked on top of the single-layer busbar section 354 in a connected state. This forms the busbar 340.

[0167] In the example shown in Figure 8, the single-layer busbar section 354 is shorter than the single-layer busbar section 54 in the embodiment, but its length is not particularly limited.

[0168] In this modified example, a groove 350V is formed on the outer surface in the thickness direction of the single-layer busbar portion 354, along a direction that intersects (in this case, perpendicular) with the extending direction of the busbar 340. The groove 350V can serve to retain the sealant 70 (see Figure 4) in the single-layer busbar portion 354 when the sealant 70 is interposed between the base body 60B, which corresponds to the base body 60, and the single-layer busbar portion 354.

[0169] In this modified example, the annular seal 362 is positioned within an annular groove 60Bg formed in the portion of the base body 60B facing the surface of the case 22. The annular seal 362 is interposed in a compressed state between the base body 60B and the surface of the case 22, sealing the space between the base body 60B and the case 22. The configuration of the annular seal is not limited to this example, and it may also be interposed between the base body and the mounting hole 22h1.

[0170] In this modified example, a positioning pin 60Bp is formed on the base body 60B, and the positioning pin 60Bp is inserted into a positioning hole formed in the case 22. The positioning pin 60Bp may be omitted.

[0171] According to this modified example, since water does not pass through the single-layer busbar section 354, the sealing performance of the single-layer busbar section 354 can be improved.

[0172] Furthermore, since there is no need for a joint between the single-layer busbar section 354 and the laminated busbar section 350, the busbar 340 can be made smaller.

[0173] Furthermore, the configurations described in the above embodiments and each of the modified examples can be combined as appropriate, as long as they do not contradict each other. [Explanation of symbols]

[0174] 10. Integrated Mechatronics Unit 12 Inverters 18 Inverter-side busbar 18h screw insertion hole 20. Rotating Electrical Machines (Equipment) 22 cases 22h1 mounting hole 22h2 screw hole 24 Armature 26 Coil connection terminals 26h Screw insertion hole 28 Field 30, 130, 230, 330 terminal block 40, 140, 240, 340 Busba 42 First connection terminal (connection terminal) 42h, 44h screw insertion holes 44. Second connection terminal (single-layer connection terminal, connection terminal) 50, 350 Laminated busbar section 51 Board material 52, 252 joint 52P Joint 52a Convex part 53, 153, 253 extension part 54, 254, 354 Single-layer bass section 54g sealing groove 54g2 recess 55, 255 Single-layer joint 55a recess 56 Single-layer extension 60, 60B stand body 60Bg Annular groove 60Bp positioning pin 62 Holding body 64 Screw fastening part 64h Screw insertion hole 66, 67 Extension holding part 66P partial protrusion 68 Partition 70 sealant 150 First layer busbar section 153V bend 153Va, 153Vb bending points 240 Busba 250 Second Laminated Busbar Section 350V groove 351 Plate-like portion 362 Ring seal 400 Board material 410 blades N Nut S screw

Claims

1. A terminal block that is fixed to the equipment, A bass bar formed in an elongated shape, A base body that is fixed to the equipment while holding the busbar, Equipped with, A portion of the busbar in the extending direction is a laminated busbar section in which multiple plate materials are stacked, and at least a portion of the remaining section is a single-layer busbar section. The laminated busbar portion includes a joint portion joined to the single-layer busbar portion and an extension portion extending from the joint portion. The tip of the extension is a connecting end, and at least the connecting end protrudes from the base body. The aforementioned joint is a part that has been joined by pressing, welding, or screw fastening. Each of the multiple plate materials stacked in the laminated busbar section is thinner than the thickness of the single-layer busbar section, forming a terminal block.

2. A terminal block according to claim 1, A terminal block in which at least a portion of the single-layer busbar portion in the direction of extension is covered by the base body.

3. A terminal block according to claim 2, A terminal block in which a sealant is interposed between the single-layer busbar portion and the base body to fill the gap between the single-layer busbar portion and the base body.

4. A terminal block according to claim 3, A sealing groove is formed on the outer circumferential surface of the single-layer busbar portion in a direction intersecting the extending direction of the busbar. A terminal block in which the sealant is interposed between the sealing groove and the base body.

5. A terminal block according to any one of claims 1 to 4, The extension portion has a bent portion between the joint portion and the connecting end that bends in such a way as to change the position of the connecting end relative to the joint portion in the thickness direction of the laminated busbar portion, terminal block.

6. A terminal block according to any one of claims 1 to 4, The aforementioned connection end is a terminal block having a screw insertion hole.

7. A terminal block according to any one of claims 1 to 4, The single-layer busbar portion includes a single-layer joint portion joined to the joint portion and a single-layer extension portion extending from the single-layer joint portion. A terminal block in which the tip of the single-layer extension is a single-layer connection end, and at least the single-layer connection end protrudes from the main body of the base.

8. A terminal block according to any one of claims 1 to 4, The laminated busbar section includes a first laminated busbar section and a second laminated busbar section. Each of the first laminated busbar section and the second laminated busbar section has the joint section and the extension section, A terminal block in which the joint portion of the first stacked busbar portion and the joint portion of the second stacked busbar portion are joined to the single-layer busbar portion at different positions from each other.

9. A terminal block according to any one of claims 1 to 4, A terminal block in which the joint between the aforementioned joint and the single-layer busbar is covered by the base body.

10. A bass bar formed in an elongated shape, A laminated busbar section made of multiple laminated boards, A single-layer busbar section joined to the aforementioned laminated busbar section, Equipped with, The laminated busbar portion includes a joint portion joined to the single-layer busbar portion and an extension portion extending from the joint portion. The aforementioned joint is a part that has been joined by pressing, welding, or screw fastening. Each of the multiple plate materials laminated in the laminated busbar section is a busbar that is thinner than the thickness of the single-layer busbar section.

Images