Connection terminals

Abstract

To improve the bus bar protection performance.SOLUTION: A connection terminal has: a base; a filler filled in the base; a bus bar arranged to penetrate through the base and the filler; and a coating tube that coats the bus bar. The coating tube is arranged to be buried in the filler.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a connection terminal.

Background Art

[0002] Patent Document 1 discloses a structure in which a bus bar is covered with a tube.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above structure, there is a portion of the bus bar that is not covered by the tube and is exposed to the outside. Therefore, there is room for improvement in the protection of the bus bar.

[0005] The present invention has been made in view of such technical problems, and an object thereof is to improve the protection of the bus bar.

Means for Solving the Problems

[0006] According to an aspect of the present invention, there is provided a connection terminal having a base, a filler filled in the base, a bus bar disposed so as to penetrate the base and the filler, and a coating tube covering the bus bar, wherein the coating tube is disposed so as to be embedded in the filler. An electric wire is electrically connected to the filler-side end of the busbar, the electric wire is covered with a protective tube, and the protective tube is covered with a covering tube.

Effects of the Invention

[0007] According to this, since the coating tube is disposed so as to be embedded in the filler, the root portion of the bus bar that cannot be completely protected by the coating tube can be protected by the filler. Therefore, the protection of the bus bar is improved. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic diagram of a harness equipped with connection terminals according to an embodiment of the present invention. [Figure 2] Figure 2 is a schematic cross-sectional view of the connection terminal. [Modes for carrying out the invention]

[0009] Hereinafter, a harness 100 equipped with connection terminals 110 and 120 according to an embodiment of the present invention will be described with reference to the attached drawings.

[0010] Figure 1 is a schematic diagram of the harness 100. As shown in Figure 1, the harness 100 of this embodiment electrically connects the rotating electric machine 200 and the inverter 300.

[0011] The harness 100 includes a connection terminal 110, a connection terminal 120, and electric wires 131, 132, and 133. In this embodiment, the rotating electric machine 200 operates on three-phase AC power. Therefore, the harness 100 includes three electric wires 131, 132, and 133.

[0012] The electric wires 131, 132, and 133 are electrically connected to connection terminals 110 and 120, respectively.

[0013] The connection terminal 110 is fixed to the rotating electric machine 200 by fastening fastening portions 10a and 10b provided on the base portion 10 to the stator housing 210 of the rotating electric machine 200 with bolts 50.

[0014] The connection terminal 120 is fixed to the inverter 300 by fastening fastening portions 20a and 20b provided on the base portion 20 to the case 310 of the inverter 300 with bolts 50.

[0015] Next, while referring to FIG. 2, the configuration of the connection terminal 110 will be described. Since the configuration of the connection terminal 110 is the same as that of the connection terminal 120, a detailed description of the connection terminal 120 will be omitted.

[0016] FIG. 2 is a schematic cross-sectional view of the connection terminal 110. As shown in FIG. 2, the connection terminal 110 includes a base 10, a filling material 11 filled in the base 10, bus bars 12, 13, 14 penetrating through the base 10 and the filling material 11, a covering tube 15 covering the bus bar 12, a covering tube 16 covering the bus bar 13, and a covering tube 17 covering the bus bar 14.

[0017] The base 10 has fastening portions 10a, 10b, an outer peripheral groove 10c provided on the outer peripheral surface, and a recess 10d provided on the surface on the side where the base 10 is fixed to the stator housing 210 and exposed to the outside of the rotating electrical machine 200. The base 10 is formed of an insulating resin. The base 10 can be integrally formed with the bus bars 12, 13, 14 by insert molding, for example.

[0018] An O-ring 60 for sealing between the base 10 and the stator housing 210 is attached to the outer peripheral groove 10c.

[0019] The recess 10d is formed so as to surround the peripheral portions of the roots of the bus bars 12, 13, 14. Therefore, when the filling material 11 is filled in the recess 10d, the root portions of the bus bars 12, 13, 14 are protected by the filling material 11.

[0020] The filling material 11 is formed by filling a thermosetting resin such as an epoxy resin into the recess 10d by a potting method. When the filling material 11 is filled in the base 10, as a result, a configuration in which the bus bars 12, 13, 14 penetrate through the base 10 and the filling material 11 is realized.

[0021] The bus bars 12, 13, 14 are formed of a conductive material such as copper or aluminum and are electrically connected to a stator coil (not shown) of the rotating electrical machine 200.

[0022] The covering tube 15 is an insulating tube that covers the portion of the bus bar 12 that is exposed outside the rotating electrical machine 200. The covering tube 16 is an insulating tube that covers the portion of the bus bar 13 that is exposed outside the rotating electrical machine 200. The covering tube 17 is an insulating tube that covers the portion of the bus bar 14 that is exposed outside the rotating electrical machine 200. The covering tubes 15, 16, and 17 may be, for example, heat-shrinkable tubes.

[0023] Also, the covering tubes 15, 16, and 17 are arranged such that the ends on the base 10 side are embedded in the filling material 11. That is, after the covering tubes 15, 16, and 17 are arranged at a predetermined position with respect to the base 10, the base 10 is filled with the filling material 11.

[0024] For example, it is conceivable to protect the bus bars 12, 13, and 14 up to the roots with the covering tubes 15, 16, and 17 by pressing the covering tubes 15, 16, and 17 against the surface of the base 10 without providing the filling material 11. However, in this case, inevitably, a gap will form between the base 10 and the covering tubes 15, 16, and 17, or the covering tubes 15, 16, and 17 will deform due to aging deterioration, etc., causing the root portions of the bus bars 12, 13, and 14 to be exposed, thereby reducing the protection of the bus bars 12, 13, and 14.

[0025] Also, for example, it is conceivable to protect the bus bars 12, 13, and 14 up to the roots with the covering tubes 15, 16, and 17 by providing the filling material 11 and pressing the covering tubes 15, 16, and 17 against the surface of the filling material 11. However, in this case as well, inevitably, a gap will form between the filling material 11 and the covering tubes 15, 16, and 17, or the covering tubes 15, 16, and 17 will deform due to aging deterioration, etc., causing the roots of the bus bars 12, 13, and 14 to be exposed, thereby reducing the protection of the bus bars 12, 13, and 14.

[0026] Therefore, in this embodiment, as described above, the covering tubes 15, 16, and 17 are arranged to be embedded in the filler material 11. This allows the filler material 11 to properly protect the base portions of the busbars 12, 13, and 14 that cannot be fully protected by the covering tubes 15, 16, and 17. Thus, the protective performance of the busbars 12, 13, and 14 is improved.

[0027] A wire 131 is electrically connected to the end of busbar 12 on the side facing the filler material 11. A wire 132 is electrically connected to the end of busbar 13 on the side facing the filler material 11. A wire 133 is electrically connected to the end of busbar 14 on the side facing the filler material 11. The connections between busbars 12, 13, and 14 and wires 131, 132, and 133 are made, for example, by welding or soldering.

[0028] Electric wire 131 is covered with protective tube 131a. Electric wire 132 is covered with protective tube 132a. Electric wire 133 is covered with protective tube 133a. Protective tubes 131a, 132a, and 133a are, for example, silicone glass tubes.

[0029] As shown in Figure 2, the covering tube 15 extends to the outer circumference of the protective tube 131a. In other words, the protective tube 131a is covered by the covering tube 15. Similarly, the protective tube 132a is covered by the covering tube 16, and the protective tube 133a is covered by the covering tube 17.

[0030] In this way, by extending the covering tubes 15, 16, and 17 to the outer circumference of the protective tubes 131a, 132a, and 133a, the protection of both the ends of the busbars 12, 13, and 14 and the electric wires 131, 132, and 133 is improved.

[0031] Furthermore, as described above, the connection terminal 110 of this embodiment has a plurality of busbars (12, 13, 14), with busbars 12 and 13 arranged adjacent to each other, and busbars 13 and 14 arranged adjacent to each other.

[0032] When conductors are in close proximity, discharge can occur, causing electrical interference between them. In contrast, in this embodiment, since the covering tubes (15, 16, 17) are insulating, the effects of discharge can be suppressed when multiple busbars (12, 13, 14) are placed adjacent to each other. Therefore, it becomes possible to reduce the distance between multiple busbars (12, 13, 14), which contributes to miniaturization of the connection terminal 110.

[0033] Specifically, in this embodiment, the effect of discharge between busbar 12 and busbar 13, which is an adjacent busbar located next to busbar 12, can be suppressed. In other words, the effect of discharge between busbar 13 and busbar 12, which is an adjacent busbar located next to busbar 13, can be suppressed.

[0034] Furthermore, the effect of discharge between busbar 13 and busbar 14, which is an adjacent busbar located next to busbar 13, can be suppressed. In other words, the effect of discharge between busbar 14 and busbar 13, which is an adjacent busbar located next to busbar 14, can be suppressed.

[0035] The main effects and advantages of the connection terminal 110 according to the embodiment of the present invention are summarized below. The connection terminal 120 also exhibits similar effects and advantages.

[0036] (1) The connection terminal 110 has a base 10, a filler material 11 filled in the base 10, bus bars 12, 13, and 14 arranged to penetrate the base 10 and the filler material 11, and covering tubes 15, 16, and 17 that cover the bus bars 12, 13, and 14, the covering tubes 15, 16, and 17 are arranged to be embedded in the filler material 11.

[0037] According to this, the covering tubes 15, 16, and 17 are positioned to be embedded in the filler material 11, so that the base portions of the busbars 12, 13, and 14 that cannot be fully protected by the covering tubes 15, 16, and 17 can be protected by the filler material 11. Therefore, the protective performance of the busbars 12, 13, and 14 is improved.

[0038] (2) Electrical wires 131, 132, and 133 are electrically connected to the ends of the busbars 12, 13, and 14 on the side of the filler material 11, and the electric wires 131, 132, and 133 are covered with protective tubes 131a, 132a, and 133a, and the protective tubes 131a, 132a, and 133a are covered with covering tubes 15, 16, and 17.

[0039] This improves the protection of both the ends of the busbars 12, 13, and 14 and the electric wires 131, 132, and 133.

[0040] (3) The connection terminal 110 has adjacent busbars (12, 13, 14) arranged adjacent to the busbars (12, 13, 14), and the covering tubes (15, 16, 17) are insulating.

[0041] When conductors are in close proximity, discharge can occur, causing electrical interference between them. However, since the covering tubes (15, 16, 17) are insulating, the effects of discharge can be suppressed when multiple busbars (12, 13, 14) are placed adjacent to each other. Therefore, it becomes possible to reduce the distance between multiple busbars (12, 13, 14), which contributes to miniaturization of the connection terminal 110.

[0042] Although embodiments of the present invention have been described above, these embodiments are merely examples of how the present invention can be applied, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments.

[0043] For example, in the above embodiment, a harness 100 equipped with connection terminals 110 and 120, connecting a rotating electric machine 200 and an inverter 300, was described. However, the electrical equipment to which the harness equipped with the connection terminals according to the present invention is connected is not limited to this. The connection terminals according to the present invention are applicable to harnesses that connect various electrical equipment.

[0044] Furthermore, in the above embodiment, a connection terminal 110 having three busbars 12, 13, and 14 was described. However, the number of busbars provided by the connection terminal may be one, two, or four or more. [Explanation of Symbols]

[0045] 110 Connection terminals 120 connection terminals 10 base 11 Filling material 12 Bus Bar (Adjacent Bus Bar) 13 Bus bar (adjacent bus bar) 14 Bus Bar (Adjacent Bus Bar) 15. Covering tube 16. Covering tube 17. Covering tube 20 base 131 Electric wire 131a Protective Tube 132 Electric wire 132a Protective Tube 133 Electric wire 133a Protective Tube

Claims

1. The base and, The filler material filled in the base, A bus bar is arranged to penetrate the base and the filler, A covering tube that covers the busbar, It has, The covering tube is positioned to be embedded in the filler, A connection terminal, A wire is electrically connected to the end of the busbar on the filler side. The aforementioned electric wire is covered with a protective tube. The protective tube is covered by the covering tube. Connection terminal.

2. A connection terminal according to claim 1, The system further comprises adjacent busbars arranged adjacent to the aforementioned busbar, The covering tube has insulating properties. Connection terminal.

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