Terminal Block Unit

Abstract

To provide a terminal block unit that improves usability for versatile purposes while suppressing a decrease in the ease of assembling.SOLUTION: A terminal block unit 1 comprises: a plurality of terminal metal fixtures 20; a terminal block body 10 for holding the plurality of terminal metal fixtures 20; a bas-bar unit 30 having a plurality of bus bars 31 in which a first connecting hole 35a and a second connecting hole 36a to be connected to electrical equipment are formed at both ends of each; and a plurality of bolts 40 for tightening one of the plurality of bus bars 31 for each terminal metal fixture 20. The bus-bar unit 30 has a resin molding 32 that integrally supports some of the bus bars 31 in the state of being not in contact with each other, and some of the other bus bars 31 not provided with the resin molding 32 is made to be an exposed part 33.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a terminal block unit. [Background technology]

[0002] Conventionally, there are terminal blocks in which multiple terminal fittings are held in the terminal block body. Patent Document 1 discloses technology relating to a connector that electrically connects the inverter side and the motor side, in which a housing held by a plate can be considered the terminal block body and multiple first conductive members included in the terminal unit can be considered the terminal fittings. The connector further has multiple second conductive members connected to the first conductive members, and the multiple second conductive members are configured as a single component by a covering member, thereby preventing a decrease in assembly workability. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-15642 Summary of the Invention [Problem to be solved by the invention]

[0004] In the connector disclosed in Patent Document 1, each of the multiple second conductive members is a linear, short member with one end connected to the first conductive member and the other end connected to the inverter-side conductive member. In other words, Patent Document 1 does not provide an example of a case in which the second conductive member is considered to be a busbar with a more complex circuit shape connected to an electrical device such as an inverter. Therefore, for example, if the multiple second conductive members are considered to be a single unit, it is not necessarily easy to replace the unit with another unit having a different overall shape, which results in a lack of versatility.

[0005] The present invention has been made in view of the problems inherent in the prior art, and an object of the present invention is to provide a terminal block unit that improves versatility while preventing a decrease in assembly workability. [Means for solving the problem]

[0006] A terminal block unit according to an embodiment of the present invention comprises a plurality of terminal fittings, a terminal block main body that holds the plurality of terminal fittings, a busbar unit having a plurality of busbars, each having a connection hole formed at both ends for connection to an electrical device, and a plurality of bolts that fasten one of the plurality of busbars to each of the terminal fittings, wherein the busbar unit has a resin molded portion that integrally supports a portion of each busbar without contacting each other, and the other portion of the busbar that does not have the resin molded portion is an exposed portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a terminal block unit that improves versatility while preventing a decrease in assembly workability. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of the terminal block unit according to the first embodiment. [Figure 2] FIG. 2 is an exploded view of the terminal block unit according to the first embodiment. [Figure 3] FIG. 2 is a front view of the busbar unit. [Figure 4] FIG. 4 is a partially exploded view showing the connection of a first end of each bus bar to an electrical device. [Figure 5] FIG. 10 is a partially exploded view showing the connection of the second end of each bus bar to an electrical device. [Figure 6] 6 is a cross-sectional view of the terminal block unit corresponding to VI-VI in FIG. 1. [Figure 7] FIG. 10 is a perspective view of a terminal block unit according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The terminal block units according to the embodiments will be described in detail below with reference to the drawings. Note that the dimensional proportions in the drawings are exaggerated for the sake of convenience and may differ from the actual proportions.

[0010] (First embodiment) Fig. 1 is a perspective view of a terminal block unit 1 according to a first embodiment, and Fig. 2 is an exploded view of the terminal block unit 1.

[0011] As an example, the terminal block unit 1 is related to a motor mounted on a vehicle such as a hybrid vehicle or an electric vehicle, and is installed in a conductive path that electrically connects an inverter, which is an electrical device installed in the vehicle, to a high-voltage battery. In this case, the terminal block unit 1 is specifically attached to the motor case of the motor. The terminal block unit 1 includes a terminal block main body 10, a plurality of terminal fittings 20, a bus bar unit 30, and a plurality of bolts 40.

[0012] The terminal block body 10 is formed of synthetic resin or the like and holds a plurality of terminal fittings 20. The combination of the terminal block body 10 and a plurality of terminal fittings 20 may also be simply referred to as a "terminal block." In this embodiment, the terminal block body 10 holds two terminal fittings 20. In other words, the number of poles of the terminal block in this case is two. However, the terminal block body 10 may hold three or more terminal fittings 20.

[0013] Hereinafter, each direction will be defined as follows, with the terminal block body 10 as the reference. The terminal block body 10 holds each terminal fitting 20 so that they are all aligned in the same position and arranged in parallel in one direction. In this case, the direction along which each terminal fitting 20 is arranged on the terminal block body 10 is defined as the X direction. The direction along which the bolt 40 passes through the insertion hole 21 of the terminal fitting 20 held on the terminal block body 10 is defined as the Y direction, which is perpendicular to the X direction. Hereinafter, with respect to the Y direction, the side where a mating connector (not shown) on the high-voltage battery side is mated may be referred to as the "front side," and the side where the busbar unit 30 connected to the inverter is assembled may be referred to as the "rear side." The direction perpendicular to both the X direction and the Y direction is defined as the Z direction.

[0014] The terminal block body 10 also includes a housing portion 11, a plate portion 12, a first contact portion 13, and a second contact portion 14.

[0015] The housing 11 is a set of cylindrical portions having therein cavities 11a (see FIGS. 5 and 6) into which, for example, a portion of a mating connector on the high-voltage battery side is fitted. One cavity 11a is provided for each terminal fitting 20. Therefore, in this embodiment, the housing 11 has a shape in which two cylindrical portions corresponding to the two terminal fittings 20 are adjacent to each other in the X direction. The axial directions of the two cylindrical portions are each along the Y direction. An opening 11b of the cavity 11a into which a portion of the mating connector is inserted is formed on the front side of the housing 11.

[0016] The plate portion 12 supports the housing portion 11 and is held by a motor case (not shown) to which the terminal block unit 1 is attached. The plate portion 12 has a shape including two main planes parallel to the XZ plane and is provided so as to be continuous with the rear side of the housing portion 11. The plate portion 12 can be fixed to the motor case using fixing bolts (not shown). In this case, the plate portion 12 may have, for example, two first fixing holes 12a that are inserted in the Y direction and to which a metallic cylindrical collar is attached. The two first fixing holes 12a are arranged so as to sandwich the housing portion 11 between them in the X direction.

[0017] The first contact portion 13 and the second contact portion 14 are each provided on the outer surface of the terminal block body 10 at a location facing a portion of the busbar 31 when the busbar unit 30 is assembled to the terminal block body 10. The first contact portion 13 has a first contact surface 13a that faces a bent plate portion 39, which is a portion of the busbar 31, at a position where the busbar 31 is fastened to the terminal fitting 20. The second contact portion 14 has a second contact surface 14a that comes into contact with a flat portion that is bent from the mounting plate portion 34, which is a portion of the busbar 31, after the busbar 31 is fastened to the terminal fitting 20. In this embodiment, the first contact portion 13 and the second contact portion 14 are provided corresponding to the busbar 31 that is fastened to each terminal fitting 20 using a bolt 40. The specific shapes and configurations of the first contact portion 13 and the second contact portion 14 will be described in detail below, along with the specific shape of the busbar 31.

[0018] The terminal fittings 20 are conductive members having one end fastened to one bus bar 31 connected to the inverter and the other end serving as a connection end 22 (see FIGS. 5 and 6) connected to a mating terminal of a mating connector. In this embodiment, there are two terminal fittings 20, namely, a first terminal fitting 20a and a second terminal fitting 20b. The shapes of the respective terminal fittings 20 are identical to each other.

[0019] One end of the terminal fitting 20 is formed in a flat plate shape parallel to the XZ plane, and has an insertion hole 21 through which the bolt 40 is inserted. As described above, the insertion direction of the insertion hole 21 is along the Y direction. Note that the terminal block main body 10 is previously formed with a screw hole into which the bolt 40 inserted into the insertion hole 21 is engaged. The connection end 22 is a rod-shaped portion whose axial direction is along the Y direction.

[0020] Furthermore, the terminal fittings 20 are held so that the engagement directions of the bolts 40 are parallel and the insertion holes 21 are aligned along the insertion direction as described above. Here, the terminal fittings 20 may be integrally held in the terminal block body 10 by insert molding.

[0021] FIG. 3 is a front view of the busbar unit 30 as viewed in the X direction.

[0022] The busbar unit 30 includes a plurality of busbars 31 and a resin molded portion 32 .

[0023] In this embodiment, the busbar unit 30 has two busbars 31: a first busbar 31a and a second busbar 31b. The first busbar 31a is a fastening target for the first terminal fitting 20a. The second busbar 31b is a fastening target for the second terminal fitting 20b. The first busbar 31a and the second busbar 31b have different specific shapes depending on the configuration of the inverter side, but their basic shapes are roughly the same. Therefore, the basic shape of the busbars 31 will be described below using the first busbar 31a as an example.

[0024] The first bus bar 31a is made of a conductive material such as metal and is a plate body having a shape whose extension direction changes appropriately from one end, a first end 35, to the other end, a second end 36. As an example, the first bus bar 31a has an attachment plate portion 34, the first end 35, the second end 36, an extension plate portion 37, and a plurality of flat plate portions connecting these plate portions. Hereinafter, the shape of the first bus bar 31a will be described based on the state in which the bus bar unit 30 is assembled to the terminal block main body 10, i.e., the state in which the first bus bar 31a is fastened to the first terminal fittings 20a.

[0025] The mounting plate portion 34 is a plate portion whose main plane is parallel to the XZ plane and which has a through hole 34a formed therein for passing the bolt 40. The through hole 34a penetrates in the Y direction.

[0026] FIG. 4 is a partially exploded view showing the connection of the first end 35 of the bus bar 31 to the inverter.

[0027] The first end portion 35 is a plate portion whose main plane is parallel to the XZ plane and in which a first connection hole 35a is formed, through which a first connection bolt 41 passes. The first connection hole 35a passes along the Y direction. The first end portion 35 can be connected to a first component 101, which is a part of an inverter. A first screw hole 101a is formed in the first component 101 in advance. In this case, an operator can connect the first end portion 35 and the first component 101 by passing the first connection bolt 41 through the first connection hole 35a and engaging it with the first screw hole 101a.

[0028] Like the first bus bar 31a, the first end 35 of the second bus bar 31b is also part of the inverter and can be connected to a second component 102 that configures a separate circuit from the first component 101. The second component 102 is provided with a second screw hole 102a in advance. In this case, the worker can connect the first end 35 and the second component 102 by inserting the first connection bolt 41 through the first connection hole 35a and engaging it with the second screw hole 102a.

[0029] In addition, in the first bus bar 31a, the first end portion 35 is continuous with one end of the attachment plate portion 34 via a second flat plate portion 38b whose main plane is parallel to the XY plane.

[0030] FIG. 5 is a partially exploded view showing the connection of the second end 36 of the bus bar 31 to the inverter.

[0031] The second end portion 36 is a plate portion whose main plane is parallel to the XZ plane and which has a second connection hole 36a formed therein, through which the second connection bolt 42 passes. The second connection hole 36a passes along the Y direction. The second end portion 36 is part of an inverter and can be connected to a first circuit 103a of a third component 103 which constitutes a separate circuit from the first component 101 and the second component 102. A third screw hole 103c is formed in the first circuit 103a in advance. In this case, an operator can connect the second end portion 36 and the first circuit 103a by passing the second connection bolt 42 through the second connection hole 36a and engaging it with the third screw hole 103c.

[0032] Like the first bus bar 31a, the second end 36 of the second bus bar 31b is also part of the inverter and can be connected to a second circuit 103b that is separate from the first component 101, the second component 102, and the first circuit 103a. A fourth screw hole 103d is provided in the second circuit 103b in advance. In this case, the worker can connect the second end 36 and the second circuit 103b by inserting the second connection bolt 42 through the second connection hole 36a and engaging it with the fourth screw hole 103d.

[0033] Here, the first end 35 and the second end 36 are both ends of each bus bar 31, and therefore the mounting plate portion 34 is located between the first end 35 and the second end 36.

[0034] Furthermore, in the first bus bar 31a, the second end 36 is continuous with one end of the mounting plate portion 34 via the fifth flat plate portion 38e, the fourth flat plate portion 38d, the third flat plate portion 38c, the extension plate portion 37, and the first flat plate portion 38a, in that order. Here, the first flat plate portion 38a has a shape whose main plane is parallel to the XY plane. The third flat plate portion 38c has a shape whose main plane is parallel to the XY plane. The fourth flat plate portion 38d has a shape whose main plane is parallel to the YZ plane. The fifth flat plate portion 38e has a shape whose main plane is parallel to the XY plane.

[0035] The extension plate portion 37 is a plate portion whose main plane is parallel to the XZ plane and extends in the Z direction. In the busbar unit 30, the extension plate portion 37 of the first busbar 31a and the extension plate portion 37 of the second busbar 31b are arranged so that at least a portion of each of them is aligned along the X direction.

[0036] The resin molded portion 32 integrally supports a portion of the first bus bar 31a and a portion of the second bus bar 31b in a non-contact state. In this embodiment, in each bus bar, the third flat plate portion 38c is continuous with one end of the fourth flat plate portion 38d, and the fifth flat plate portion 38e is continuous with the other end of the fourth flat plate portion 38d. In this case, as shown in FIG. 3 , the third flat plate portion 38c is continuous with the fourth flat plate portion 38d while being bent at a right angle in the direction opposite to the X direction, and the fifth flat plate portion 38e is continuous with the fourth flat plate portion 38d while being bent at a right angle in the X direction. Therefore, in this embodiment, the resin molded portion 32 may be molded to include the entire fourth flat plate portion 38d, at least a portion of the third flat plate portion 38c, and at least a portion of the fifth flat plate portion 38e. In this case, the resin molded portion 32 is molded in a state in which it contains multiple bends in each bus bar 31, so that, for example, it is possible to prevent the resin molded portion 32 from becoming misaligned on the bus bar 31 after molding.

[0037] In addition, the resin molded portion 32 may have a second fixing hole 32a that is inserted in the Y direction and has a metallic cylindrical collar attached thereto, for example, so that the busbar unit 30 can be fixed to a part of the motor case using a fixing bolt if necessary.

[0038] 3, the exposed portion 33 is a general term for a portion of the busbar 31 where the resin molded portion 32 is not provided. In this embodiment, the mounting plate portion 34, the first end portion 35, the second end portion 36, and at least a part of the extension plate portion 37 are the exposed portion 33.

[0039] When assembling the bus bar unit 30 to the terminal block body 10, the bolt 40 fastens one of the plurality of bus bars 31 for each terminal fitting 20. An operator can fasten the bus bar 31 to the terminal fitting 20 by passing the bolt 40 through the through hole 34a formed in the mounting plate portion 34 and the insertion hole 21 formed in the terminal fitting 20 and engaging the bolt 40 with the screw hole in the terminal block body 10.

[0040] Fig. 6 is a cross-sectional view of the terminal block unit 1 corresponding to the line VI-VI in Fig. 1. Fig. 6 is cut along the YZ plane, which includes the second bus bar 31b but does not include the engagement position of the bolt 40.

[0041] In the busbar unit 30, the portion of the first busbar 31a where the extension plate portion 37 and the third flat plate portion 38c are continuous is the bent plate portion 39 (see FIGS. 2 and 3). In the bent plate portion 39, the third flat plate portion 38c extends in the Y direction from the extension plate portion 37. Therefore, when the busbar unit 30 is assembled to the terminal block main body 10, a portion of the third flat plate portion 38c faces a portion of the terminal block main body 10 in the Z direction, as shown in FIG. 6. Therefore, in this embodiment, the first abutment portion 13 is provided on the terminal block main body 10 so that a portion of the first abutment portion 13 faces a portion of the extension plate portion 37 and another portion of the first abutment portion 13 faces a portion of the third flat plate portion 38c. In this case, the surface facing the extension plate portion 37 or the third flat plate portion 38c is the first abutment surface 13a, which is indicated by the area surrounded by the two-dot chain line in FIG. 6.

[0042] In the busbar unit 30, the first flat plate portion 38a of each busbar 31 is bent in the direction opposite to the Y direction from one end of the mounting plate portion 34. Therefore, in this embodiment, the second contact portion 14 has a protruding shape that protrudes in the direction opposite to the Y direction, and is brought into contact with the surface of the first flat plate portion 38a after the busbar 31 is fastened to the terminal fitting 20, as shown in Fig. 6. At this time, the surface that comes into contact with the first flat plate portion 38a is the second contact surface 14a.

[0043] Next, the effects of the terminal block unit 1 will be described.

[0044] The terminal block unit 1 includes a plurality of terminal fittings 20 and a terminal block main body 10 that holds the plurality of terminal fittings 20. The terminal block unit 1 also includes a busbar unit 30 having a plurality of busbars 31, each having connection holes formed at both ends for connection to electrical devices, and a plurality of bolts 40 that fasten one of the plurality of busbars 31 to each of the terminal fittings 20. The busbar unit 30 has a resin molded portion 32 that integrally supports a portion of each busbar 31 in a non-contact state, and the other portion of each busbar 31 that is not provided with the resin molded portion 32 is an exposed portion 33.

[0045] Here, in the above example, the multiple terminal fittings 20 correspond to the first terminal fittings 20a and the second terminal fittings 20b. In the above example, the multiple bus bars 31 correspond to the first bus bar 31a and the second bus bar 31b. In the above example, both ends of each bus bar 31 correspond to the first end 35 where the first connection hole 35a is formed and the second end 36 where the second connection hole 36a is formed. In addition, the electrical device connected to the connection hole is, for example, an inverter.

[0046] First, in the terminal block unit 1, each bus bar 31 is bolted to each terminal fitting 20, so that a worker can easily attach each bus bar 31 to each terminal fitting 20. In other words, a worker can easily assemble the bus bar unit 30 to the terminal block main body 10. Furthermore, in the bus bar unit 30, the multiple bus bars 31 are integrally supported by the resin molded portion 32, so that the multiple bus bars 31 can be easily handled, and as a result, the number of steps required to assemble them to the terminal block main body 10 can be reduced. Therefore, the terminal block unit 1 is advantageous in terms of assembly workability.

[0047] Furthermore, because each bus bar 31 is bolted to each terminal fitting 20, an operator can easily remove the bus bar unit 30 from the terminal block main body 10 by releasing the bolts. Here, it is assumed that the terminal block main body 10 has a uniform shape. Meanwhile, it is assumed that multiple bus bar units 30 are prepared in advance, each with a common shape for fastening portions to multiple terminal fittings 20 but with different overall shapes for routing the bus bars 31. In this case, an operator can easily replace the desired bus bar unit 30 on the terminal block main body 10, thereby enabling the configuration of the terminal block unit 1 to be appropriately modified to suit various vehicle models and individual specifications. In particular, since the terminal block unit 1 has connection holes at both ends of each bus bar 31 for connection to electrical equipment, the portions fastened to the terminal fittings 20 using bolts 40 are located at different positions from the ends where the connection holes are located. Therefore, the terminal block unit 1 can accommodate bus bars 31 with complex shapes that meet the constraints of electronic devices. Furthermore, in the busbar unit 30, the portions where the resin molded portions 32 are not provided are exposed portions 33, so that each busbar 31 retains a shape that allows for flexibility. This allows each busbar 31 to absorb the dimensional tolerance of the portion where it is fastened to the terminal fitting 20, improving mountability and, as a result, further expanding the range of busbar 31 shapes that can be accommodated. Therefore, the terminal block unit 1 can improve versatility.

[0048] As described above, according to this embodiment, it is possible to provide a terminal block unit 1 that improves versatility while preventing a decrease in assembly workability.

[0049] Furthermore, in the terminal block unit 1, the terminal fittings 20 may have insertion holes 21 through which the bolts 40 are inserted. The bus bar 31 may have, in the exposed portion 33, a mounting plate portion 34 in which through holes 34a through which the bolts 40 are inserted. The terminal block main body 10 may hold the terminal fittings 20 so that the engagement directions of the bolts 40 are parallel and the insertion holes 21 are aligned in a direction perpendicular to the insertion direction.

[0050] In the above example, the insertion direction of the bolt 40 corresponds to the Y direction. Also, in the above example, the direction in which the insertion holes 21 are aligned, that is, the direction perpendicular to the insertion direction of the bolt 40, corresponds to the X direction.

[0051] According to this terminal block unit 1, although each of the bus bars 31 needs to be fastened with a bolt 40, the engagement direction of each bolt 40, i.e., the fastening direction of each bus bar 31, is uniform, thereby improving assembly workability.

[0052] In the terminal block unit 1, at least one of the bus bars 31 may have a bent plate portion 39 at the exposed portion 33. The terminal block body 10 may have a first contact surface 13a that faces the bent plate portion 39 at a position where the bus bar 31 having the bent plate portion 39 is fastened to the terminal fitting 20.

[0053] According to this terminal block unit 1, when assembling the bus bar unit 30, the worker can easily position the bus bar unit 30 by bringing the bus bar unit 30 close to the terminal block body 10 so that the bent plate portion 39 abuts on the first abutment surface 13 a, thereby improving the efficiency of the assembly work.

[0054] Furthermore, in the terminal block unit 1, each bus bar 31 may have a flat plate portion at the exposed portion 33 that is bent from the mounting plate portion 34. The terminal block body 10 may have a plurality of second contact surfaces 14a that are brought into contact with each flat plate portion after the bus bar 31 is fastened to the terminal fitting 20.

[0055] In the above example, the flat plate portion bent from the mounting plate portion 34, which comes into contact with the second contact surface 14a, corresponds to the first flat plate portion 38a.

[0056] According to this terminal block unit 1, after the bus bar unit 30 is assembled to the terminal block body 10, the first flat plate portion 38a of each bus bar 31 can be kept in contact with the second abutment surface 14a, preventing excessive deformation of the bus bar 31. This is therefore advantageous in ensuring the quality of the terminal block unit 1.

[0057] (Second embodiment) FIG. 7 is a perspective view of the terminal block unit 1 according to the second embodiment.

[0058] In the terminal block unit 1 according to the first embodiment described above, the individual bus bars 31 in the bus bar unit 30 have exposed portions 33, which promotes heat dissipation from the bus bars 31, and as a result, can be advantageous in increasing the current flow value.

[0059] In the busbar unit 30, the first busbar 31a and the second busbar 31b have, as part of the exposed portion 33, extension plate portions 37 that are aligned in the same position with their main planes facing the same direction. Therefore, in the busbar unit 30 of this embodiment, as shown in Fig. 7, a heat sink 50 is attached across the two extension plate portions 37. The heat sink 50 may be attachable to and detachable from each busbar 31.

[0060] That is, the busbar unit 30 may have the heat sink 50 attached across the exposed portions 33 of each of the multiple busbars 31 .

[0061] According to this embodiment, the heat sink 50 is attached to the exposed portion 33, which can further improve heat dissipation, and as a result, can further increase the value of the current flow.

[0062] In the above description, the first bus bar 31a and the second bus bar 31b have roughly the same basic shape as each other as the multiple bus bars 31. However, the bus bar unit 30 may include three or more multiple bus bars 31, and the specific shapes of the individual bus bars 31 may differ from each other, as well as their basic shapes.

[0063] Although one embodiment has been described above, the embodiment is not limited to this, and various modifications are possible within the scope of the gist of the embodiment. [Explanation of symbols]

[0064] 1 terminal block unit 10 Terminal block body 13a First contact surface 14a Second contact surface 20 Terminal fittings 20a First terminal fitting 20b Second terminal fitting 21 Insertion hole 30 Busbar unit 31 Busbar 31a 1st bus bar 31b Second bus bar 32 Resin molding section 33 Exposed part 34 Mounting plate 34a through hole 35 First end 35a First connection hole 36 Second end 36a Second connection hole 38a 1st flat plate part 39 Bent plate part 40 volts 50 Heatsink

Claims

1. A plurality of terminal fittings; a terminal block body that holds a plurality of the terminal fittings; a bus bar unit having a plurality of bus bars, each having a connection hole formed at both ends thereof for connection to an electric device; a plurality of bolts for fastening any one of the plurality of bus bars to each of the terminal fittings; Equipped with the bus bar unit has a resin molded portion that integrally supports a portion of each of the bus bars in a non-contact state, and the other portion of each of the bus bars that is not provided with the resin molded portion is an exposed portion; Each of the bus bars has, at the exposed portion, a first end portion in which one of the connection holes is formed, a second end portion in which the other of the connection holes is formed, and an attachment plate portion in which a through hole through which the bolt passes is formed, The mounting plate portion is located between the first end and the second end of the terminal block unit.

2. The terminal fitting has an insertion hole through which the bolt is inserted, 2. The terminal block unit according to claim 1, wherein the terminal block body holds each of the terminal fittings so that the insertion directions of the bolts are parallel and the insertion holes are aligned in a direction perpendicular to the insertion direction.

3. At least one of the plurality of bus bars has a bent plate portion in the exposed portion, 3. The terminal block unit according to claim 1, wherein the terminal block body has a first abutment surface that faces the bent plate portion at a position where the bus bar having the bent plate portion is fastened to the terminal fitting.

4. Each of the bus bars has a flat plate portion bent from the mounting plate portion at the exposed portion, The terminal block unit according to claim 2 , wherein the terminal block body has a plurality of second contact surfaces that come into contact with the respective flat plate portions after the bus bar is fastened to the terminal fitting.

5. The terminal block unit according to claim 1 or 2, wherein the bus bar unit includes a heat sink attached across the exposed portion of each of the plurality of bus bars.

Images