Terminal block and bus bar

Abstract

The purpose of the present invention is to further improve the misalignment absorption performance of a bus bar itself while maintaining sealing properties. A terminal block fixed to a device includes a bus bar formed in a long shape and a block body fixed to the device in a state of holding the bus bar, a portion of the bus bar in an extension direction is a laminated bus bar portion in which a plurality of plate materials are laminated, and at least a portion of the remaining portion is a single-layer bus bar portion.

Description

Technical Field

[0001] The invention relates to a terminal seat and a bus bar. Background Art

[0002] Patent Document 1 discloses a terminal block mounted on a cylindrical motor case. The terminal block is used as a block 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 literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2012-186882 Summary of the invention Problems to be solved by the invention

[0004] When the inverter and the motor are integrated, there is a possibility that the busbar on the motor side and the busbar on the inverter side may be misaligned due to assembly tolerance, thermal expansion and contraction, etc. It is desirable to further improve the misalignment absorption performance of the busbar itself while maintaining sealing performance.

[0005] Therefore, an object of the present invention is to further improve the misalignment absorption performance of the bus bar itself while maintaining the sealing performance. Solutions to Solve Problems

[0006] The terminal seat of the present invention is fixed to the device, and the terminal seat comprises a bus bar formed in a long strip shape and a seat body fixed to the device to maintain the state of the bus bar, a part of the bus bar in the extension direction is a stacked bus bar part formed by stacking multiple plate materials, and at least the remaining part is a single-layer bus bar part.

[0007] Furthermore, the bus bar of the present invention is formed in an elongated shape and includes a laminated bus bar portion formed by laminating a plurality of plate members and a single-layer bus bar portion joined to the laminated bus bar portion. Effects of the Invention

[0008] According to the present invention, the misalignment absorption performance of the bus bar itself can be further improved while maintaining the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 Schematic diagram showing a mechatronic unit according to the embodiment. Figure 2 It is a perspective view showing a terminal block. Figure 3 yes Figure 2 Cross-sectional view along line III-III. Figure 4 yes Figure 3 An enlarged view of the circled portion. Figure 5 It is a perspective view showing a bus bar. Figure 6 It is a partially cutaway perspective view showing a terminal block according to a first modified example. Figure 7 It is a partially cutaway perspective view showing a terminal block according to a second modified example. Figure 8 It is a partially cutaway perspective view showing a terminal block according to a third modified example. Fig. 9 It is an explanatory diagram showing an example of the skiving process. DETAILED DESCRIPTION

[0010] [Description of Embodiments of the Invention] First, embodiments of the present invention will be described by way of examples.

[0011] The terminal block of the present invention is as follows.

[0012] (1) A terminal block fixed to a device, the terminal block comprising a bus bar formed into a long strip and a seat body fixed to the device in a state of holding the bus bar, a portion of the bus bar extending in a direction thereof being a stacked bus bar portion formed by stacking a plurality of plate materials, and at least a remaining portion being a single-layer bus bar portion.

[0013] According to the present invention, the stacked busbar portion can be easily bent in the stacking direction. Therefore, the busbar has excellent misalignment absorption performance compared to a busbar formed of a single metal plate. In addition, even if liquid intrudes between the plates, the liquid is blocked by the remaining single-layer busbar portion of at least a portion in the extension direction of the busbar. Therefore, the same sealing performance as that of a busbar formed of a single metal plate can be maintained.

[0014] (2) In the terminal block of (1), at least a portion of the single-layer bus bar portion in an extending direction may be covered by the block body.

[0015] In this case, since at least a portion of the single-layer bus bar portion in the extending direction is seated by the main body, infiltration of liquid along the outer surface of the single-layer bus bar portion is also suppressed, and sealing performance is further improved.

[0016] (3) In the terminal block of (2), a sealant may be interposed between the single-layer bus bar portion and the block body, and the sealant may fill a gap between the single-layer bus bar portion and the block body.

[0017] Thus, the sealing performance between the single-layer bus bar portion and the seat body can be further improved by the sealant.

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

[0019] In this case, the sealant is unlikely to be displaced in the extending direction of the bus bar, and the sealing performance of the sealant is easily maintained.

[0020] (5) In any one of the terminal seats of (1) to (4), the stacked bus bar portion may include a joining portion joined to the single-layer bus bar portion and an extending portion extending from the joining portion, wherein the top end of the extending portion is a connecting end, and at least the connecting end protrudes from the seat body.

[0021] Thus, when the connecting end of the extension portion is connected to another electrical component, the extension portion can be easily deformed in the thickness direction. Therefore, the misalignment absorption performance is excellent.

[0022] (6) In the terminal block of (5), the extension portion may have a bent portion between the joining portion and the connection end, and the bent portion may be bent in such a manner that a position of the connection end relative to the joining portion is changed in a thickness direction of the laminated bus bar portion.

[0023] This bent portion allows the position of the connection end to be adjusted in accordance with the position of another electrical component to be connected.

[0024] (7) In the terminal block of (5) or (6), the connection end may have a screw insertion hole, thereby making it easy to connect the connection end to other electrical components with a screw.

[0025] (8) In any one of the terminal seats of (5) to (7), the single-layer bus bar portion may include a single-layer joining portion joined to the joining portion and a single-layer extension portion extending from the single-layer joining portion, wherein the top end of the single-layer extension portion is a single-layer connection end, and at least the single-layer connection end protrudes from the seat body.

[0026] In this case, the single-layer connection end of the single-layer bus bar portion can be connected to other electrical components. This can simplify the structure, for example, on the connection structure side where the displacement absorption performance is not much required.

[0027] (9) In any one of the terminal blocks of (5) to (7), the stacked bus bar portion may include a first stacked bus bar portion and a second stacked bus bar portion, the first stacked bus bar portion and the second stacked bus bar portion each having the joining portion and the extending portion, the joining portion of the first stacked bus bar portion and the joining portion of the second stacked bus bar portion being joined to the single-layer bus bar portion at different positions from each other.

[0028] This makes it possible to absorb the positional displacement at the connection end of the first laminated bus bar portion and the connection end of the second laminated bus bar portion.

[0029] (10) In the terminal block according to any one of (5) to (9), a joining portion between the joining portion and the single-layer bus bar portion may be covered by the block body.

[0030] This makes it easy to maintain the joined state of the single-layer bus bar portion and the stacked bus bar portion.

[0031] (11) In any one of the terminal blocks of (1) to (10), a single metal material may be integrally connected to the single-layer bus bar portion in the thickness direction, and the stacked bus bar portion may be integrally connected to the single-layer bus bar portion and separated in the thickness direction.

[0032] This can suppress gaps in the single-layer bus bar portion, thereby improving sealing performance.

[0033] (12) In the terminal block of (11), the laminated bus bar portion may be a portion obtained by skiving a plate-like portion.

[0034] Thereby, the laminated bus bar portion connected to the single-layer bus bar portion can be easily formed.

[0035] Furthermore, the bus bar of the present invention is as follows.

[0036] (13) A bus bar formed in an elongated shape includes a laminated bus bar portion formed by laminating a plurality of plate members and a single-layer bus bar portion joined to the laminated bus bar portion.

[0037] According to the present invention, the stacked busbar portion can be easily bent in the stacking direction. Therefore, the busbar has excellent misalignment absorption performance compared to a busbar formed of a single metal plate. In addition, even if liquid intrudes between the plates, the liquid is blocked by at least a portion of the remaining single-layer busbar in the extension direction of the busbar. Therefore, the same sealing performance as that of a busbar formed of a single metal plate can be maintained.

[0038] (14) In the bus bar of (13), the single metal material may be integrally connected to the single-layer bus bar portion in the thickness direction, and the laminated bus bar portion may be integrally connected to the single-layer bus bar portion and separated in the thickness direction.

[0039] This can suppress gaps in the single-layer bus bar portion, thereby improving sealing performance.

[0040] (15) In the bus bar of (14), the laminated bus bar portion may be a portion obtained by skiving a plate-like portion.

[0041] Thus, the laminated bus bar portion connected to the single-layer bus bar portion can be easily formed.

[0042] [Details of Embodiments of the Invention] Specific examples of the terminal block and bus bar of the present invention are described below with reference to the drawings. The present invention is not limited to these examples, but is indicated by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0043] [Implementation Method] The terminal block and bus bar of the embodiment are described below. The terminal block is fixed to the device and is a component for electrically connecting the device to other electrical devices. The bus bar is a component for making electrical connections and is a wiring component. In this embodiment, the device is described as a rotating motor and the other electrical device is an example of an inverter that drives and controls the rotating motor. The device and other electrical devices do not necessarily have to be rotating motors or inverters, and may also be other devices such as batteries, DC-DC converters, junction boxes, etc.

[0044] <About the overall structure of the mechatronic unit incorporating the terminal block> For the sake of convenience, the overall structure of a mechatronic unit in which a terminal block including a laminated bus bar is incorporated will be described. Figure 1 is a schematic diagram showing the mechatronic unit 10 .

[0045] The mechatronic unit 10 includes a rotating electrical machine 20 and an inverter 12 .

[0046] The rotating electrical machine 20 is a rotating electrical machine including a housing 22, an armature 24, and a field magnet 28. Figure 1 , an example is shown in which an armature 24 as a stator is fixed in a cylindrical housing 22. An excitation 28 is arranged in the armature 24 as a rotor. The excitation 28 rotates by the magnetic field generated by the armature 24, or the armature 24 generates an electromotive force by the rotation of the excitation 28. In this embodiment, it is assumed that the rotating electrical machine 20 is a rotating electrical machine that can be used as a three-phase AC motor. In addition to being able to work as a motor, the rotating electrical machine can also work as a generator based on or instead of it.

[0047] The armature 24 includes a stator core and a plurality of coil wires. The stator core includes a plurality of teeth, and the plurality of teeth are arranged around a rotating shaft. Each coil wire is wound around one or more teeth. At least a portion of the plurality of ends of the plurality of coil wires is led out from between the plurality of teeth to one end side of the armature in the axial direction.

[0048] The armature 24 has a coil connection end 26. The coil connection end 26 is, for example, an elongated conductive plate-shaped portion. The coil connection end 26 is arranged on one end side of the armature 24 in the axial direction. A screw insertion hole 26h for screwing is formed at the coil connection end 26. The coil connection end 26 can be the end of the coil wire itself, or it can be a metal plate connected to the coil wire by welding, screwing, etc. In the present embodiment, three corresponding coil connection ends 26 are arranged in a parallel state at intervals on one end side of the armature 24. The coil connection end 26 is an example of an electrical component that becomes the connecting partner of the bus bar 40.

[0049] In addition, the inverter 12 is a device having an inverter circuit. It is assumed that the inverter 12 is integrated with the rotating electric machine 20. For example, the inverter 12 is integrated with the housing 22 of the rotating electric machine 20 by bolt fixing or the like.

[0050] The inverter 12 includes an inverter-side bus bar 18 connected to the output end of the inverter circuit. The inverter-side bus bar 18 is a slender plate-shaped member formed of a metal plate such as copper or copper alloy. A screw insertion hole 18h for screwing is formed in the inverter-side bus bar 18. In the present embodiment, three inverter-side bus bars 18 corresponding to three extend in parallel from the inverter 12 at intervals toward the rotating electric machine 20. The inverter-side bus bar 18 is an example of an electrical component that is connected to the bus bar 40.

[0051] The terminal block 30 is a member fixed to the housing 22 of the rotating electrical machine 20 and connects the rotating electrical machine 20 and the inverter 12. The terminal block 30 includes a bus bar 40. The bus bar 40 includes a first connection end 42 and a second connection end 44.

[0052] The first connection end 42 is an end of the bus bar 40 facing the outside of the housing 22. The first connection end 42 is supported toward the outside of the housing 22 at a position that can be connected to the end of the bus bar 18 of the inverter 12. The first connection end 42 is arranged at a position overlapping with the bus bar 18 in a state where the inverter 12 and the rotating electric machine 20 are integrated.

[0053] The second connection end 44 is an end of the bus bar 40 facing the inside of the housing 22. The second connection end 44 is connected to the end of the coil connection end 26 facing the inside of the housing 22. When the terminal block 30 is fixed to the housing 22, the second connection end 44 is arranged at a position overlapping with the coil connection end 26.

[0054] In the present embodiment, three bus bars 40 corresponding to three are arranged in parallel with a gap therebetween. The number of bus bars 40 is arbitrary.

[0055] It is considered that when the inverter 12 and the rotating electric machine 20 are integrated, the end of the bus bar 18 and the first connection end 42 of the bus bar 40 are misaligned within the range of the assembly tolerance. In addition, it is considered that when the inverter 12 and the rotating electric machine 20 are integrated, the end of the bus bar 18 and the first connection end 42 of the bus bar 40 are misaligned due to thermal expansion and contraction.

[0056] The terminal block 30 can play a role in absorbing the misalignment between the end of the bus bar 18 and the first connection end 42 of the bus bar 40 .

[0057] In addition, sealing is sometimes required inside and outside the housing 22. For example, sealing is sometimes desired to prevent oil in the housing 22 from leaking to the outside along the bus bar 40. In addition, sealing is sometimes desired to prevent water outside the housing 22 from penetrating into the housing 22 along the bus bar 40. The terminal block 30 can play a role in suppressing leakage or penetration of liquid along the bus bar 40.

[0058] In addition, within the range of assembly tolerance, the coil connection end 26 may be arranged away from the predetermined position. In addition, due to thermal expansion and contraction, the coil connection end 26 may be arranged away from the predetermined position. Therefore, the coil connection end 26 and the second connection end 44 of the bus bar 40 may be misaligned.

[0059] In addition to the function of absorbing the misalignment between the end of the bus bar 18 and the first connection end 42 of the bus bar 40, the terminal block 30 can also, on this basis or instead, play the role of absorbing the misalignment between the coil connection end 26 and the second connection end 44 of the bus bar 40. In the second modified example below, an example of the function of the terminal block 30 absorbing the misalignment between the coil connection end 26 and the second connection end 44 of the bus bar 40 is described.

[0060] <About terminal block> The terminal block 30 will be described in more detail. Figure 2 It is a perspective view showing the terminal block 30 . Figure 3 yes Figure 2 The III-III line cross-sectional view. Figure 2 FIG. 4 shows a state where the terminal base 30 is removed from the housing 22. Figure 3 2 shows the state where the terminal base 30 is fixed to the housing 22. Figure 2 and Figure 3 , the housing 22 is partially shown. Figure 4 yes Figure 3 An enlarged view of the circled portion. Figure 5 It is a perspective view showing the bus bar 40 .

[0061] The terminal block 30 includes a bus bar 40 and a block body 60 .

[0062] The bus bar 40 is a conductive member formed in a long strip shape. One end of the bus bar 40 is a first connection end 42 , and the other end of the bus bar 40 is a second connection end 44 .

[0063] A screw insertion hole 42h is formed in the first connection end 42. In a state where the end of the bus bar 18 overlaps with the first connection end 42, a screw S is inserted through the screw insertion holes 18h and 42h. And, the screw S is screwed and fastened to the nut N. Thus, the first connection end 42 and the end of the bus bar 18 are sandwiched between the head of the screw S and the nut N, and the two are fixed in an electrically connected state.

[0064] The screw insertion hole 42h is preferably larger than the diameter of the spiral shaft portion of the screw S. In the direction along the overlapping surface of the first connection end 42 and the end of the bus bar 18, the screw insertion hole 42h can be set larger than the diameter of the spiral shaft portion of the screw S within a range that can absorb the misalignment of the first connection end 42 and the end of the bus bar 18 within the tolerance range. The above-mentioned misalignment can also be absorbed by making the screw insertion hole 18h larger than the diameter of the spiral shaft portion of the screw S. Therefore, the size of the screw insertion hole 42h can also be set in consideration of the size of the screw insertion hole 18h.

[0065] A screw insertion hole 44h is formed in the second connection end 44. When the coil connection end 26 and the second connection end 44 overlap, the screw S is inserted through the screw insertion holes 26h and 44h. And, the screw S is screwed and fastened to the nut N. Thus, 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 the two are fixed in an electrically connected state.

[0066] The screw insertion hole 44h is preferably larger than the diameter of the spiral shaft of the screw S. In the direction along the overlapping surface of the second connection end 44 and the coil connection end 26, the screw insertion hole 44h can be set larger than the diameter of the spiral shaft of the screw S within the range that can absorb the misalignment of the second connection end 44 and the coil connection end 26 within the tolerance range. The above-mentioned misalignment can also be absorbed by making the screw insertion hole 26h larger than the diameter of the spiral shaft of the screw S. Therefore, the size of the screw insertion hole 44h can also be set in consideration of the size of the screw insertion hole 26h.

[0067] In the present embodiment, the terminal block 30 includes three bus bars 40. The terminal block 30 only needs to include at least one bus bar.

[0068] A portion of the bus bar 40 in the extension direction is the laminated bus bar portion 50, and at least a portion of the rest is the single-layer bus bar portion 54. In the present embodiment, the portion of the bus bar 40 close to the first connection end 42 is the laminated bus bar portion 50, and the portion of the bus bar 40 from the central portion in the extension direction of the bus bar 40 to the portion close to the second connection end 44 is the single-layer bus bar portion 54. At a position of the bus bar 40 closer to the first connection end 42 than the central portion in the extension direction, the laminated bus bar portion 50 and the single-layer bus bar portion 54 are partially overlapped and joined.

[0069] The laminated bus bar portion 50 is a portion where a plurality of plate materials 51 are laminated. The plate materials 51 are thinner than the overall thickness of the laminated bus bar portion 50 and thinner than the thickness of the single-layer bus bar portion 54. The plate materials 51 are made of a metal plate such as copper, copper alloy, aluminum, or aluminum alloy. The plate materials 51 are formed into an elongated plate shape. The laminated bus bar portion 50 is overlapped in a state where the extension directions of the plurality of plate materials 51 are aligned, and therefore, the laminated bus bar portion 50 is also formed into an elongated plate shape.

[0070] More specifically, the laminated bus bar portion 50 is formed into a rectangular shape that is long in one direction. It is also assumed that the end of the laminated bus bar portion 50 is formed into a rounded shape. In this embodiment, two plates 51 are overlapped. Three or more plates may be overlapped.

[0071] The laminated bus bar portion 50 includes a joint portion 52 and an extending portion 53. The joint portion 52 is a portion joined to the single-layer bus bar portion 54 so as to overlap.

[0072] The extension portion 53 is a portion extending from the joint portion 52. In the present embodiment, the extension portion 53 extends to the side opposite to the extension direction of the single-layer bus bar portion 54. That is, the joint portion 52 of the laminated bus bar portion 50 is bonded to the single-layer bus bar portion 54, and the laminated bus bar portion 50 and the single-layer bus bar portion 54 extend in a straight line.

[0073] The top end of the extension portion 53 is the first connection end 42. As described above, a screw insertion hole 42h is formed in the first connection end 42. For example, a hole for forming the screw insertion hole 42h is formed in each of the plates 51. By overlapping a plurality of plates 51, the holes of the plates overlap, thereby forming the screw insertion hole 42h.

[0074] As described later, if the stacked bus bar portion 50 is deformed in the stacking direction, the position of the hole shifts between the stacked plates 51. Even if the position of the hole shifts, the hole is preferably larger than the diameter of the screw S so that the screw S can be inserted into the screw insertion hole 42h.

[0075] The thickness and width of the laminated bus bar portion 50 , the thickness and width of the plate 51 , and the number of the plate are arbitrary and are set in consideration of the allowable current value, ease of deformation, workability, etc. required for the bus bar 40 .

[0076] The plurality of plates 51 do not necessarily have to be formed in the same shape. For example, a plurality of plates having different thicknesses may be stacked to form a stacked busbar portion. In addition, holes of different shapes may be formed in the plurality of plates 51, and the screw insertion holes 42h may be formed through the common opening of the plurality of holes.

[0077] In at least a portion of the stacked bus bar portion 50, a plurality of plates 51 are stacked in a state where they can be relatively displaced. The stacking of a plurality of plates 51 in a state where they can be relatively displaced means that adjacent plates 51 are not joined to each other, so that adjacent plates 51 rub against each other, and each plate 51 is in a state where it can be bent in the thickness direction (the stacking direction of the stacked bus bar portion 50).

[0078] In the present embodiment, in the region other than the joint portion 52 of the laminated bus bar portion 50, i.e., the extension portion 53, the plurality of plates 51 are laminated in a state where they can be relatively displaced. Therefore, the laminated bus bar portion 50 can be bent in the thickness direction more easily than the single-layer bus bar portion 54 in the region extending from the single-layer bus bar portion 54.

[0079] The single-layer bus bar portion 54 is not formed by joining a plurality of plates, but is a portion of a single-layer structure formed by the same material in a continuous thickness direction. The single-layer bus bar portion 54 is formed, for example, by a metal plate. The metal plate is, for example, a metal plate of copper, copper alloy, aluminum, aluminum alloy, or the like.

[0080] The single-layer bus bar portion 54 is formed in an elongated shape, more specifically, in a rectangular shape that is long in one direction. In the present embodiment, the single-layer bus bar portion 54 includes a single-layer joining portion 55 and a single-layer extending portion 56 .

[0081] The single-layer joint portion 55 is a portion that is joined to and overlaps with the laminated bus bar portion 50 .

[0082] In the present embodiment, the joining portion 52 and the single-layer joining portion 55 are structures formed by press working so as to maintain the joined state.

[0083] In this embodiment, a convex portion 52a protruding in the thickness direction is formed on one side of the joining portion 52 and the single-layer joining portion 55, and a concave portion 55a recessed in the thickness direction is formed on the other side. The joining portion 52 and the single-layer joining portion 55 are joined by embedding the convex portion 52a into the concave portion 55a.

[0084] Such a joint structure is formed, for example, by performing press working in a state where the joint portion 52 and the single-layer joint portion 55 overlap. Such a joint structure may be, for example, a structure called riveting, a structure called TOX (trademark) riveting, or a structure called mechanical caulking.

[0085] The plurality of plates 51 are also pressed so as to maintain the joined state at the joint portion 52. Here, the plates 51 are fixed in a stacked state by fitting a convex portion formed on any one of the plates 51 into a concave portion formed on an adjacent plate.

[0086] That is, in the present embodiment, the plurality of plate materials 51 and the single-layer joint portion 55 are pressed together in a state where they overlap, so that the plurality of plate materials 51 are joined to each other and the plurality of plate materials 51 are joined to the single-layer joint portion 55. Therefore, the overlapping state of the plate materials 51 is maintained and the joint portion 52 and the single-layer joint portion 55 are joined in the same process, so that the bus bar 40 is easily manufactured.

[0087] In addition, the joint 52 and the single-layer joint 55 only need to be electrically and mechanically joined, and are not limited to the above examples, and can also be joined by any structure. For example, the joint and the single-layer joint can also be joined by welding or screwing. In addition, the plates 51 also only need to be electrically and mechanically joined, and are not limited to the above examples, and can also be joined by any structure. For example, the plates can also be joined by welding or screwing. In addition, the joining of the joint and the single-layer joint, and the joining of the plates do not have to be achieved with the same joining structure. For example, the plates can be joined by welding, and the joining of the joint and the single-layer joint can be performed by riveting or screwing.

[0088] In the following description, the part that plays the role of electromechanically joining the joining part 52 and the single-layer joining part 55 is referred to as a joining part 52P. For example, the part where the convex part 52a is fitted into the concave part 55a to achieve electromechanical joining is the joining part 52P.

[0089] The single-layer extension portion 56 is a portion extending from the single-layer bonding portion 55. In the present embodiment, the single-layer extension portion 56 extends to the side opposite to the extension portion 53 described above.

[0090] The tip of the single-layer extension portion 56 is the second connection end 44 , which is an example of a single-layer connection end. As described above, the second connection end 44 has a screw insertion hole 44 h formed therein.

[0091] A sealing groove 54g extending in a direction intersecting the extension direction of the bus bar 40 is formed on the outer peripheral surface of the single-layer bus bar portion 54. The portion of the single-layer bus bar portion 54 where the sealing groove 54g is formed is a portion covered by the seat body 60. In the present embodiment, the sealing grooves 54g are formed on two surfaces of the portion between the single-layer joint portion 55 and the second connection end 44 in the single-layer extension portion 56. In each surface, a plurality of (four in this case) sealing grooves 54g are formed at intervals along the extension direction of the bus bar 40. Each sealing groove 54g extends in a direction orthogonal to the extension direction of the bus bar 40.

[0092] The sealing groove 54g is not necessarily configured as described above. It is sufficient to provide at least one sealing groove. The sealing groove may extend obliquely relative to the extending direction of the bus bar. The sealing groove may be formed on the side of the bus bar.

[0093] Furthermore, in the present embodiment, partially depressed recessed portions 54 g 2 are formed in regions including the regions where the plurality of sealing grooves 54 g are formed on both sides of the bus bar 40 .

[0094] The thickness and width of the single-layer bus bar portion 54 are arbitrary and are set in consideration of the allowable current value required for the bus bar 40 and the like.

[0095] In the bus bar 40, the length of the laminated bus bar portion 50 and the length of the single-layer bus bar portion 54 are arbitrary. The longer the laminated bus bar portion 50 is, the easier it is for the laminated bus bar portion 50 to bend in the lamination direction. In addition, the longer the single-layer bus bar portion 54 is, the larger the area that can suppress the leakage or infiltration of liquid along the plate 51. The lengths of the laminated bus bar portion 50 and the single-layer bus bar portion 54 can be set according to the desired misalignment absorption performance and sealing performance, etc.

[0096] The seat body 60 is a portion fixed to the rotating electric machine 20 as an example of a device while holding the bus bar 40. Here, a mounting hole 22h1 is formed in the housing 22 of the rotating electric machine 20. The mounting hole 22h1 is a hole that penetrates the inside and outside of the housing 22. In the present embodiment, the mounting hole 22h1 is an elongated through hole. A flat portion is formed in the housing 22, and the mounting hole 22h1 is formed in the flat portion. A threaded hole 22h2 is formed on the outer periphery of the mounting hole 22h1 in the flat portion. In the present embodiment, the threaded hole 22h2 is formed on both outer sides of the mounting hole 22h1 in the housing 22 in the long side direction. In a state where a part of the seat body 60 is inserted into the above-mentioned mounting hole 22h1, the seat body 60 is screwed and fixed to the housing 22 using the threaded hole 22h2 screws.

[0097] It is assumed that the seat body 60 is an insulator such as resin. The resin forming the seat body 60 is preferably polyamide 6T (PA6T), polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), and more preferably PA6T. When the rotary electric machine 20 is oil-cooled, the resin forming the seat body 60 is preferably PA6T or PPS. When the rotary electric machine 20 is water-cooled, the resin forming the seat body 60 may also be PBT. The plurality of bus bars 40 are supported at a certain position relative to the rotary electric machine 20 by the seat body 60.

[0098] The seat body 60 includes a holding body 62 , a screw tightening portion 64 , extended holding portions 66 and 67 , and a partition portion 68 .

[0099] The holding body 62 is formed into a shape that closes the outer opening of the mounting hole 22h1 and covers the outer opening peripheral edge of the mounting hole 22h1, and is formed into a rectangular plate shape that is larger than the outer opening of the mounting hole 22h1.

[0100] The screw tightening part 64 is a part protruding from the outer periphery of the holding body 62. In this embodiment, the seat body 60 includes two screw tightening parts 64. The two screw tightening parts 64 protrude outward from both ends in the longitudinal direction of the holding body 62. The screw tightening parts 64 are formed with screw insertion holes 64h.

[0101] When the holding body 62 covers the outer opening of the mounting hole 22h1, the holding body 62 can contact the outer surface of the housing 22 around the mounting hole 22h1. In this state, the pair of screw tightening parts 64 are arranged on the pair of threaded holes 22h2. The seat body 60 is fixed to the housing 22 by inserting the screw S into the screw insertion holes 64h and screwing and fastening to the threaded holes 22h2 of the housing 22.

[0102] In this state, the holding body 62 is pressed against the outer surface of the housing 22 around the mounting hole 22h1, and the seat body 60 and the housing 22 are sealed. Preferably, an annular seal formed of rubber or the like may be interposed between the seat body 60 and the housing 22. Alternatively, the seat body 60 may include an insertion portion inserted into the mounting hole 22h1, and the annular seal may be interposed between the insertion portion and the mounting hole 22h1. In this case, the sealing performance between the mounting hole and the seat body is further improved by the annular seal.

[0103] The busbar 40 is held by the holding body 62 so as to penetrate inside and outside the housing 22. In the present embodiment, the plurality (three) busbars 40 are held in parallel at intervals by the holding body 62. The plurality (three) busbars 40 are held by the holding body 62 in an insulated state from each other.

[0104] The middle portion of the bus bar 40 in the extending direction is embedded in the holding body 62. The portion of the stacked bus bar portion 50 on the first connection end 42 side protrudes from the holding body 62 to the outside of the housing 22. The portion of the bus bar 40 on the second connection end 44 side protrudes from the holding body 62 to the inside of the housing 22.

[0105] As described above, when the seat body 60 is fixed to the housing 22, the first connection end 42 of the bus bar 40 is arranged to overlap with the bus bar 18. In addition, the second connection end 44 of the bus bar 40 is arranged to overlap with the coil connection end 26.

[0106] The extended holding portion 66 protrudes from the seat body 60 to the outside of the housing 22 while partially covering each bus bar 40 . Therefore, the portion of the bus bar 40 near the first connection end 42 is exposed from the seat body 60 at the portion extending from the distal end of the extended holding portion 66 .

[0107] The extended holding portion 67 protrudes from the seat body 60 toward the inside of the housing 22 while partially covering each bus bar 40 . Therefore, the portion of the bus bar 40 near the second connection end 44 is exposed from the seat body 60 at the portion extending from the tip side of the extended holding portion 67 .

[0108] The partition 68 is a plate-like portion extending in a direction perpendicular to the direction in which the plurality of bus bars 40 are arranged, on the inner side of the housing 22 than the seat body 60 and between the bus bars 40. The partition 68 extends further to the inner side of the housing 22 than the extended holding portion 67. Such a partition 68 can partition the portions of the bus bars 40 that are close to the second connection end 44.

[0109] The extension holding portions 66 and 67 may be omitted. The partition portion 68 may be omitted.

[0110] The relationship between the laminated bus bar portion 50 and the single-layer bus bar portion 54 in the bus bar 40 will be described.

[0111] First, at least a portion of the single-layer bus bar portion 54 in the extending direction is covered by the seat body 60. More specifically, a portion of the single-layer extension portion 56 of the single-layer bus bar portion 54 close to the single-layer joint portion 55 is covered by the seat body 60. In particular, a portion of the single-layer extension portion 56 where the sealing groove 54g is formed is covered by the seat body 60.

[0112] In the present embodiment, the end of the single-layered joint portion 55 is exposed from the extended holding portion 66 of the seat body 60. The end of the single-layered joint portion 55 may be covered by the seat body 60.

[0113] The first connection end 42 located at the end of the laminated bus bar portion 50 protrudes from the seat body 60, more specifically, from the extended holding portion 66. In the present embodiment, at least a portion of the joint portion 52 in the laminated bus bar portion 50 is covered by the extended holding portion 66 of the seat body 60, and the extended holding portion 66 extends from the joint portion 52 and further protrudes from the top end portion of the extended holding portion 66. Thus, the first connection end 42 at the top end of the extension portion 53 protrudes from the extended holding portion 66 of the seat body 60.

[0114] In addition, the joint portion 52P of the joint portion 52 and the single-layer joint portion 55 is covered by the seat body 60. In the present embodiment, the joint portion 52P is covered by the extended retaining portion 66 in the seat body 60. In addition, in the present embodiment, the joint portion 52P partially protrudes more than the single-layer joint portion 55, and therefore, the extended retaining portion 66 has a local protrusion 66P that locally protrudes at the joint portion 52P. The joint portion 52P is covered by the local protrusion 66P. Thus, the extended retaining portion 66 can be made as thin as possible and can cover the locally protruding joint portion 52P.

[0115] The second connection end 44 located at the top end of the single-layer bus bar portion 54 protrudes from the seat body 60, more specifically, from the extended holding portion 67. In the present embodiment, at least a portion of the single-layer joint portion 55 in the single-layer bus bar portion 54 is covered by the extended holding portion 66 of the seat body 60, and the single-layer extension portion 56 extends from the single-layer joint portion 55, passes through the holding body 62 and the extended holding portion 67, and protrudes from the top end of the extended holding portion 67. Thus, the second connection end 44 at the top end of the single-layer extension portion 56 protrudes from the extended holding portion 67 of the seat body 60.

[0116] It is preferred that a sealant 70 is interposed between the single-layer bus bar portion 54 and the seat body 60, and the sealant 70 fills the gap between the single-layer bus bar portion 54 and the seat body 60. The sealant 70 does not need to be present in the entire portion of the single-layer bus bar portion 54 covered by the seat body 60, and it is sufficient as long as it is interposed between at least a portion of the portion of the single-layer bus bar portion 54 covered by the seat body 60 and the seat body 60. Here, the sealant 70 is interposed between the single-layer bus bar portion 54 and the extended retaining portion 67.

[0117] The sealant 70 is interposed between the single-layer bus bar portion 54 and the seat body 60 to block the intrusion path of the liquid between the single-layer bus bar portion 54 and the seat body 60. For example, the sealant 70 may be an elastic adhesive, such as an epichlorohydrin rubber adhesive.

[0118] In the present embodiment, the sealing groove 54g is formed in the single-layer bus bar portion 54, and the sealant 70 is interposed between the sealing groove 54g and the seat body 60. That is, the sealant 70 is interposed between the single-layer bus bar portion 54 and the seat body 60 in a state of filling at least a portion of the sealing groove 54g. In the present embodiment, the sealant 70 is also filled in the recessed portions 54g2 formed on both sides of the single-layer bus bar portion 54, and is interposed between the single-layer bus bar portion 54 and the seat body 60. Therefore, the sealant 70 is easily interposed between the single-layer bus bar portion 54 and the seat body 60 in a state of surrounding the entire periphery of the single-layer bus bar portion 54.

[0119] The terminal block 30 is manufactured, for example, as follows. That is, the ends of the plurality of plates 51 constituting the stacked bus bar portion 50 are overlapped with the single-layer joint portion 55 of the single-layer bus bar portion 54. Then, the single-layer joint portion 55 and the ends of the plurality of plates 51 are subjected to stamping or the like. Thus, the plurality of plates 51 are joined by the joint portion 52 and maintained in an overlapping state. In addition, the joint portion 52 of the stacked bus bar portion 50 and the single-layer joint portion 55 of the single-layer bus bar portion 54 are joined, and the stacked bus bar portion 50 and the single-layer bus bar portion 544 are connected in a linearly connected state.

[0120] Then, the sealant 70 is attached to the periphery of the portion of the single-layer bus bar portion 54 where the sealing groove 54 g is formed.

[0121] The bus bar 40 is placed in a mold for molding the seat body 60. Molten resin for forming the seat body 60 is injected into the mold, and the seat body 60 is molded using the bus bar 40 as an insert. Thus, the terminal seat 30 is manufactured in which the extended middle portion of the bus bar 40 is embedded in the seat body 60 as an insert portion. A metal collar may also be embedded in the screw insertion hole 64h.

[0122] Different from the above-mentioned manufacturing method, the terminal block 30 may be manufactured by molding the seat body 60 having the through hole into which the bus bar 40 can be inserted, and then inserting the bus bar 40 into the through hole.

[0123] An operation example of connecting the rotating electrical machine 20 and the inverter 12 via the terminal block 30 will be described.

[0124] First, regarding the rotating electric machine 20, the armature 24 and the like are installed in the housing 22, and the coil connection end 26 is arranged at a predetermined position in the housing 22. In this state, the seat body 60 is arranged at a position covering the mounting hole 22h1 of the housing 22. In this state, the second connection end 44 is arranged at a position overlapping with the coil connection end 26. Then, in a state where the second connection end 44 and the coil connection end 26 overlap in a surface contact manner, they are screwed and fixed.

[0125] Before or after the second connection end 44 and the coil connection end 26 are fastened and fixed by screws, the seat body 60 is fastened and fixed to the housing 22 by screws.

[0126] The first connection end 42 of the stacked bus bar portion 50 protrudes outward from the terminal block 30 fixed to the housing 22. The inverter 12 is arranged on the rotating electric machine 20, and the end of the bus bar 18 is arranged at a position that overlaps with the first connection end 42. However, the position of at least one of the first connection end 42 and the end of the bus bar 18 may deviate from the predetermined position in the design in the stacking direction of the stacked bus bar portion 50 (see Figure 3 In this case, the portion of the stacked bus bar portion 50 close to the first connection end 42 can be easily bent in the stacking direction according to the end position of the bus bar 18 (see Figure 3 Thus, the first connection end 42 and the end of the bus bar 18 are screwed together in a state where they overlap in a surface contact manner.

[0127] In this case, at least one of the first connection end 42 and the end of the bus bar 18 may be positioned away from a predetermined position in design in a direction perpendicular to the stacking direction of the stacked bus bar portion 50 (see Figure 3 In such a case, for example, at least one of the screw insertion hole 42h and the screw insertion hole 18h can be made larger than the diameter of the screw shaft of the screw S. In this case, the first connection end 42 and the end of the bus bar 18 can be screwed and fixed in a state where the screw S is inserted into the screw insertion hole 42h or the screw insertion hole 18h at a position offset according to the offset amount.

[0128] In addition, the order of tightening and fixing the first connection end 42 and the second connection end 44 with screws is arbitrary.

[0129] After the inverter 12 and the rotating electrical machine 20 are integrated, the misalignment between the first connection end 42 and the end of the bus bar 18 may not occur or increase due to thermal expansion and contraction, etc. In such a case, the portion of the stacked bus bar portion 50 close to the first connection end 42 is easily deformed in the stacking direction, thereby being able to cope with the misalignment.

[0130] When the inverter 12 and the rotating electric machine 20 are integrated, it is sometimes desirable to suppress the passage of liquid between the inside and the outside of the rotating electric machine 20. For example, when the rotating electric machine 20 is an oil-cooled type, oil exists in the housing 22. It is also required that the terminal block 30 does not leak the oil to the outside of the rotating electric machine 20.

[0131] Since the laminated bus bar portion 50 of the present bus bar 40 is a structure formed by overlapping the plates 51, a small gap can be formed between the plates 51. However, the portion of the bus bar 40 embedded in the seat body 60 includes the single-layer bus bar portion 54. Therefore, the passage of the liquid through the bus bar 40 is blocked by the single-layer bus bar portion 54.

[0132] In addition, a fine gap can also be generated between the bus bar 40 and the seat body 60 .

[0133] In addition, a fine gap can also be generated between the outer surface of the bus bar 40 and the seat body 60. However, since the sealant 70 is interposed between the single-layer bus bar portion 54 and the seat body 60, it is possible to suppress the liquid from passing between the outer peripheral surface of the bus bar 40 and the seat body 60. In particular, since the sealant 70 is interposed between the sealing groove 54g and the seat body 60, it is difficult for the sealant 70 to be displaced from the outer peripheral surface of the bus bar 40, and the state in which the sealant 70 is interposed between the outer peripheral surface of the bus bar 40 and the seat body 60 can be more reliably maintained. Therefore, the outer peripheral surface of the bus bar 40 and the seat body 60 are more reliably sealed by the sealant 70.

[0134] Therefore, in the terminal block 30 , oil leakage from the housing 22 can be suppressed.

[0135] Even when the rotating electrical machine 20 is not an oil-cooled type, the terminal block 30 is sealed so that liquid such as water does not pass through.

[0136] <Effects, etc.> According to the terminal block 30 and the bus bar 40 constructed as described above, the stacked bus bar portion 50 can be easily bent in the stacking direction. Therefore, compared with a bus bar of the same thickness formed by a metal plate, the bus bar 40 has excellent misalignment absorption performance. In addition, even if liquid penetrates between the plates 51, the liquid is blocked by at least a portion of the remaining single-layer bus bar portion 54 in the extension direction of the bus bar 40. Therefore, compared with the case of a stacked bus bar in which the plates are stacked as a whole in the extension direction, it is difficult for the liquid to flow. Therefore, the same sealing as that of a bus bar formed by a metal plate can be maintained. Therefore, while maintaining the sealing, the misalignment absorption performance of the bus bar 40 itself can be further improved.

[0137] In addition, since the portion of the laminated bus bar portion 50 extending from the terminal block 30 is bent in the thickness direction as a whole to absorb misalignment, stress concentration is less likely to occur on the bus bar 40 and the block body 60. As a result, the bus bar 40 and the block body 60 are less likely to break.

[0138] Furthermore, as described above, since the laminated bus bar portion 50 is deformed, the displacement is unlikely to generate a force that displaces or deforms the terminal block 30 relative to the housing 22. Thus, the sealing performance between the seat body 60 and the housing 22 is unlikely to be reduced.

[0139] Furthermore, since at least a portion of the single-layer bus bar portion 54 is covered by the seat body 60 , infiltration of liquid along the outer surface of the single-layer bus bar portion 54 is also suppressed, and sealing performance is further improved.

[0140] Furthermore, the sealant 70 interposed between the single-layer bus bar portion 54 and the seat body 60 can further improve the sealing performance between the single-layer bus bar portion 54 and the seat body 60 .

[0141] In addition, since the sealant 70 is interposed between the sealing groove 54g and the seat body 60, the sealant 70 is unlikely to be displaced along the extending direction of the bus bar 40, and the sealing groove 54g can be interposed between the single-layer bus bar portion 54 and the seat body 60 at a stable position. Thus, the sealing performance of the sealant 70 is easily maintained.

[0142] In addition, since the first connection end 42 located at the top of the extension portion 53 of the stacked bus bar portion 50 protrudes from the seat body 60, the extension portion 53 can be deformed in the thickness direction when the first connection end 42 is connected to the bus bar 18. Therefore, the portion close to the first connection end 42 can be deformed, and the misalignment absorption performance is excellent.

[0143] Furthermore, since the screw insertion hole 42 h is formed in the first connection end 42 , the first connection end 42 and the bus bar 18 can be easily connected using the screw S.

[0144] In addition, since the second connection end 44 located at the top end of the single-layer extension portion 56 of the single-layer bus bar portion 54 extends from the seat body 60, the second connection end 44 can be connected to the coil connection end 26. For example, when the coil connection end 26 is easily deformed and the position adjustment is not required on the second connection end 44 side, the structure on the second connection end 44 side can be simplified when the coil connection end 26 and the second connection end 44 can be correctly arranged.

[0145] Furthermore, since the joint portion 52P between the joint portion 52 and the single-layer joint portion 55 is covered by the seat body 60, the joint portion 52P can also be reinforced by the seat body 60. This makes it easier to maintain the joint state between the single-layer bus bar portion 54 and the laminated bus bar portion 50.

[0146] [Modifications] Figure 6 1 is a partially cutaway perspective view showing a terminal block 130 according to a first modification. In the above embodiment, an example is shown in which the laminated bus bar portion 50 extends without bending in the thickness direction.

[0147] In the first modified example, the bus bar 140 corresponds to the bus bar 40. The laminated bus bar portion 150 corresponding to the laminated bus bar portion 50 has an extension portion 153 corresponding to the extension portion 53. The extension portion 153 has a bent portion 153V. The bent portion 153V is bent between the joint portion 52 and the first connection end 42 so that the position of the first connection end 42 relative to the joint portion 52 changes in the thickness direction of the laminated bus bar portion 150. More specifically, the bent portion 153V has a bent portion 153Va close to the joint portion 52 and a bent portion 153Vb close to the first connection end 42. The bent portion 153Va is bent from one surface of the single-layer joint portion 55 toward the extension line of the single-layer joint portion 55. The bent portion 153Va is bent to the side opposite to the bent portion 153Va in such a manner that the portion closer to the top end side than the bent portion 153Va is arranged along the extension line of the single-layer joint portion 55. That is, the bent portion 153V is bent in a crank shape including bent portions bent in opposite directions.

[0148] This makes it easy to adjust the position of the first connection end 42 in the thickness direction of the bus bar 140. The position of the first connection end 42 can be adjusted according to the position of the bus bar 18 as the connection partner.

[0149] In the present embodiment, the first connection end 42 is arranged at a position close to the single-layer bus bar portion 54 , and is arranged at the same position as the single-layer bus bar portion 54 here.

[0150] For example, when designing the mechatronic unit 10, assuming that the bus bar is made of a single metal plate, the bus bar 18 is set at a position that can overlap with the single-layer bus bar portion held by the terminal block. According to this modification, the first connection end 42 is arranged at a position close to the single-layer bus bar portion 54 in the thickness direction of the bus bar 140, so it is easy to connect to the bus bar 18 set as described above.

[0151] Figure 7 1 is a partially cutaway perspective view showing a terminal block 230 according to a second modification. In the above embodiment, an example is shown in which one end of the bus bar 40 is the laminated bus bar portion 50 and the other end is the single-layer bus bar portion 54 .

[0152] In the second modification, an example is shown in which one end of a bus bar 240 corresponding to the bus bar 40 is a first laminated bus bar portion 150 and the other end is a second laminated bus bar portion 250 .

[0153] That is, in the second modification, the bus bar 240 includes the first laminated bus bar portion 150 and the second laminated bus bar portion 250 as laminated bus bar portions.

[0154] The first laminated bus bar portion 150 is the laminated bus bar portion 150 described in the embodiment, and includes a joining portion 52 and an extending portion 153 .

[0155] The second laminated bus bar portion 250 , similarly to the laminated bus bar portion 150 , includes a bonding portion 252 corresponding to the bonding portion 52 and an extending portion 253 corresponding to the extending portion 153 . The distal end of the extending portion 253 is the second connection end 44 .

[0156] The joining portion 52 of the first laminated bus bar portion 150 and the joining portion 252 of the second laminated bus bar portion 250 are joined to the single-layer bus bar portion 254 at positions different from each other.

[0157] The single-layer bus bar portion 254 is a bus bar formed of one metal plate and is different from the single-layer bus bar portion 54 in that the single-layer bus bar portion 254 has single-layer joint portions 255 corresponding to the single-layer joint portions 55 at both ends.

[0158] Furthermore, the joint portion 52 of the first laminated bus bar portion 150 is joined to the single-layer joint portion 255 on one end side, and the joint portion 252 of the second laminated bus bar portion 250 is joined to the single-layer joint portion 255 on the other end side. The first laminated bus bar portion 150 and the second laminated bus bar portion 250 extend to opposite sides relative to each other. In addition, except that the first laminated bus bar portion 150 and the second laminated bus bar portion 250 extend to opposite sides relative to the seat body 60, the relationship between the second laminated bus bar portion 250 and the seat body 60 is the same as the relationship between the first laminated bus bar portion 150 and the seat body 60.

[0159] According to the second modification, the misalignment absorption performance of the first connection end 42 and the second connection end 44 can be improved at both ends of the bus bar 240. For example, when the position adjustment of the coil connection end 26 is difficult in the case 22, the position adjustment of the second connection end 44 can be performed.

[0160] In addition, by making one end and the other end of the bus bar 240 symmetrical, the bus bar 240 can be integrated with the seat body 60 regardless of the direction of the extension direction, so that the manufacturing becomes easy. In addition, the first stacked bus bar portion 150 and the second stacked bus bar portion 250 can be made of the same shape, so the number of types of manufactured parts can be reduced, and the installation positions of the two single-layer joint portions 255 relative to the single-layer joint portion 255 do not need to be distinguished, so this point also makes the manufacturing easy.

[0161] Furthermore, in the first embodiment described above, the first connection end outside the case may be a single-layer bus bar portion, and the second connection end inside the case may be a laminated bus bar portion.

[0162] In addition, in the above-mentioned first embodiment and each modified example, an example is shown in which the stacked bus bar portion 50, 150, 250 is arranged on one main surface side of the single-layer bus bar portion 54, 254. However, a plurality of plate materials constituting the stacked bus bar portion 50, 150, 250 may be divided and arranged on both surface sides of the single-layer bus bar portion 54, 254. In this case, each plate material may be appropriately bent in the thickness direction and overlapped at the connection end.

[0163] In the first embodiment and each modification, the example in which the laminated bus bar portions 50, 150, 250 are joined to the single-layer bus bar portions 54, 254 is described. Figure 8 The single-layer bus bar portion 354 and the stacked bus bar portion 350 may also be formed by connecting a single metal material as a whole, like the terminal block 330 and the bus bar 340 shown in the third modified example. Here, forming by connecting a single metal material as a whole means that a solid metal material is subjected to metal forming processing such as rolling, stamping, cutting or shearing, and is processed without being divided into a plurality of parts, that is, different parts are formed without being joined.

[0164] Therefore, in the single-layer bus bar portion 354, a single metal material is formed in a manner that is connected in an integral manner in the thickness direction. It is assumed that no joint traces of a plurality of plate materials joined by welding or the like remain in the single-layer bus bar portion 354. In the single-layer bus bar portion 354, since the metal material is in a solid state solidified without gaps, water can be suppressed from entering the single-layer bus bar portion 354.

[0165] In the stacked bus bar portion 350, it is separated into multiple parts in the thickness direction. That is, in the stacked bus bar portion 350, a plurality of plate-like parts 351 are stacked. The base end of each plate-like part 351 is integrally connected to any end of the above-mentioned single-layer bus bar portion 354. Therefore, there is no joint between the stacked bus bar portion 350 and the single-layer bus bar portion 354. For example, the outer surface of the plate-like part 351 located in the outermost layer among the plurality of plate-like parts 351 and the outer surface of the single-layer bus bar portion 354 are continuous in a coplanar state. There is a gap between the outer surfaces of the two plate-like parts 351 located in the outermost layer among the plurality of plate-like parts 351 that separates the plate-like parts 351. Therefore, in the stacked bus bar portion 350, each plate-like part 351 is stacked in a state where it can be relatively displaced.

[0166] For example, Fig. 9As shown, the stacked bus bar portion 350 may also be a portion of the plate 400 that is subjected to a skive process. The so-called skive process refers to a process of cutting in a manner that thins the surface of a metal material. For example, a metal plate 400 is prepared as a base material for forming a single-layer bus bar portion 354 and a stacked bus bar portion 350. Then, the plate 400 is cut in a manner that the surface of the end portion for forming the stacked bus bar portion 350 is peeled off using a blade 410 for skive processing. With respect to the portion for forming the single-layer bus bar portion 354, the skive process is not performed, and the single-layer plate-like portion is retained as it is. The skived portion is stacked as a plate-like portion 351 in a state connected to the single-layer bus bar portion 354. Thus, the bus bar 340 is formed.

[0167] In addition, Figure 8 In the example shown, the single-layer bus bar portion 354 is shorter than the single-layer bus bar portion 54 in the embodiment, etc., but the length is not particularly limited.

[0168] In this modification, a groove 350V is formed on the outer surface in the thickness direction of the single-layer bus bar portion 354 along a direction intersecting (orthogonal in this case) the extending direction of the bus bar 340. Figure 4 ) is interposed between the seat body 60B corresponding to the seat body 60 and the single-layer bus bar portion 354 , the groove 350V can play a role in allowing the sealant 70 to remain in the single-layer bus bar portion 354 .

[0169] In this modified example, the annular seal 362 is disposed in the annular groove 60Bg formed in the portion of the seat body 60B that faces the surface of the housing 22. The annular seal 362 is interposed between the seat body 60B and the surface of the housing 22 in a compressed state to seal between the seat body 60B and the housing 22. The structural example of the annular seal is not limited to this example, and the annular seal may be interposed between the seat body and the mounting hole 22h1.

[0170] In the present modification, the seat body 60B is formed with a positioning pin 60Bp, and the positioning pin 60Bp is inserted into a positioning hole formed in the housing 22. The positioning pin 60Bp may be omitted.

[0171] According to the present modification, since water does not pass through the single-layer bus bar portion 354 , the sealing performance can be improved in the single-layer bus bar portion 354 .

[0172] In addition, since the joining portion between the single-layer bus bar portion 354 and the stacked bus bar portion 350 is not required, the bus bar 340 can be miniaturized.

[0173] In addition, the respective configurations described in the above-mentioned embodiment and the respective modifications can be appropriately combined as long as they do not contradict each other. Description of Reference Numerals

[0174] 10 Mechatronics Unit 12 Inverter 18 Busbars on the inverter side 18h Screw through hole 20 Rotating motor (equipment) 22 Shell 22h1 mounting holes 22h2 threaded hole 24 Armature 26 Coil connection terminal 26h Screw insertion hole 28 Excitation 30, 130, 230, 330 terminal blocks 40, 140, 240, 340 busbars 421st connection end (connection end) 42h, 44h screw insertion hole 44 2nd connection end (single-layer connection end, connection end) 50, 350 Laminated busbar section 51 Plate 52, 252 joint 52P Joint 52a convex part 53, 153, 253 extension 54, 254, 354 single-layer busbar section 54g Sealing groove 54g2 concave part 55, 255 single layer joint 55a recess 56 Single-layer extension 60, 60B seat body 60Bg annular groove 60Bp positioning pin 62 Maintain the subject 64 Screw tightening part 64h Screw through hole 66, 67 Extended holding section 66P Local protrusion 68 Divider 70 Sealant 150 1st layered bus bar portion 153V bending part 153Va, 153Vb bending part 250 Second layer bus bar section 350V Slot 351 Plate part 362 Ring seal 400 Plate 410 Blade N Nut S screw

Claims

1. A terminal block fixed to a device, the terminal block having: A bus bar formed into a long strip; and The base body is fixed to the device in a state of holding the bus bar, wherein: A portion of the bus bar in the extending direction is a laminated bus bar portion formed by laminating a plurality of plate members, and at least a remaining portion is a single-layer bus bar portion.

2. The terminal block according to claim 1, wherein: At least a portion of the single-layer bus bar portion in an extending direction is covered by the seat body.

3. The terminal block according to claim 2, wherein: A sealant is interposed between the single-layer bus bar portion and the seat body, and the sealant fills a gap between the single-layer bus bar portion and the seat body.

4. The terminal block according to claim 3, wherein: A sealing groove is formed on the outer peripheral surface of the single-layer bus bar portion along a direction intersecting with the extending direction of the bus bar. The sealant is interposed between the sealing groove and the seat body.

5. The terminal block according to any one of claims 1 to 4, wherein: The laminated bus bar portion includes a joint portion joined to the single-layer bus bar portion and an extending portion extending from the joint portion, The top end of the extension portion is a connection end, and at least the connection end protrudes from the seat body.

6. The terminal block according to claim 5, wherein: The extending portion has a bent portion between the joining portion and the connecting end, the bent portion being bent so that a position of the connecting end relative to the joining portion is changed in a thickness direction of the laminated bus bar portion.

7. The terminal block according to claim 5, wherein: The connecting end has a screw insertion hole.

8. The terminal block according to claim 5, wherein: The single-layer bus bar portion includes a single-layer joining portion joined to the joining portion and a single-layer extending portion extending from the single-layer joining portion, The top end of the single-layer extension portion is a single-layer connection end, and at least the single-layer connection end protrudes from the seat body.

9. The terminal block according to claim 5, wherein: The laminated bus bar portion includes a first laminated bus bar portion and a second laminated bus bar portion, The first laminated bus bar portion and the second laminated bus bar portion each have the joining portion and the extending portion. The joining portion of the first laminated bus bar portion and the joining portion of the second laminated bus bar portion are joined to the single-layer bus bar portion at positions different from each other.

10. The terminal block according to claim 5, wherein: A joining portion between the joining portion and the single-layer bus bar portion is covered by the seat body.

11. The terminal block according to any one of claims 1 to 4, wherein: The single metal material is integrally connected to the single-layer bus bar portion in the thickness direction, and is integrally connected to the single-layer bus bar portion and separated in the thickness direction in the laminated bus bar portion.

12. The terminal block according to claim 11, wherein: The laminated bus bar portion is a portion in which the plate-shaped portion is subjected to a skiving process.

13. A bus bar formed into a long strip shape, the bus bar comprising: A stacked bus bar portion formed by stacking a plurality of plate materials; and A single-layer bus bar portion is joined to the laminated bus bar portion.

14. The bus bar according to claim 13, wherein: The single metal material is integrally connected to the single-layer bus bar portion in the thickness direction, and is integrally connected to the single-layer bus bar portion and separated in the thickness direction in the laminated bus bar portion.

15. The bus bar according to claim 14, wherein: The laminated bus bar portion is a portion in which the plate-shaped portion is subjected to a skiving process.

Images