JP2022167303A - Terminal block - Google Patents

Terminal block Download PDF

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Publication number
JP2022167303A
JP2022167303A JP2021073028A JP2021073028A JP2022167303A JP 2022167303 A JP2022167303 A JP 2022167303A JP 2021073028 A JP2021073028 A JP 2021073028A JP 2021073028 A JP2021073028 A JP 2021073028A JP 2022167303 A JP2022167303 A JP 2022167303A
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Prior art keywords
bus bar
terminal block
cylindrical
housing
contact
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JP2021073028A
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JP7031040B1 (en
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直也 橋居
Naoya Hashii
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2021073028A priority Critical patent/JP7031040B1/en
Priority to DE102022201655.6A priority patent/DE102022201655A1/en
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Publication of JP7031040B1 publication Critical patent/JP7031040B1/en
Priority to CN202210392507.0A priority patent/CN115241679A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5219—Sealing means between coupling parts, e.g. interfacial seal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5202—Sealing means between parts of housing or between housing part and a wall, e.g. sealing rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

To provide a waterproof structure for an externally exposed terminal block, having an insert-molded tabular bus bar, which is excellent in terms of space-saving, cost reduction, and a layout property.SOLUTION: A terminal block, which has achieved an improved layout property by insert-molding a tabular bus bar with a complicated shape, is provided such that it is exposed to the outside of a housing. A bus bar, for electrically connecting the tabular bus bar 4 in the terminal block to the inside of the housing, has a cylindrical shape. The cylindrical bus bar 12 has, at its tip end, an outer circumferentially chamfered part 16. The terminal block is provided with a second seal ring 17 such that it comes into contact with three surfaces of the tabular bus bar, the outer circumferentially chamfered part of the cylindrical bus bar, and mold resin of the terminal block.SELECTED DRAWING: Figure 3

Description

本願は、車載電力変換装置の端子台の防水構造に関するものである。 The present application relates to a waterproof structure of a terminal block of an in-vehicle power converter.

車載電力変換装置には、外部電源との接続用およびモーターとの接続用として、端子台が設けられ、外部からのケーブル端子をボルトにて端子台に締結することで、電気的に接続している。 An in-vehicle power converter is provided with a terminal block for connection to an external power source and for connection to a motor, and electrical connection is achieved by fastening cable terminals from the outside to the terminal block with bolts. there is

このような電力変換装置では、端子台は筺体内に設け、筐体には、ケーブル挿入穴と、ケーブル端子を端子台にボルト締結するための作業穴をケーブル挿入穴と直交するように設け、さらにケーブル挿入穴および作業穴から水や埃などが侵入しないように、ケーブルを筐体に固定するためのブラケットには筐体との防水性を確保するためのパッキンを設け、作業穴は防水機能を有するリッドにて塞ぐ構造が提案されている（例えば、特許文献１および特許文献２参照）。 In such a power conversion device, the terminal block is provided in the housing, and the housing is provided with a cable insertion hole and a work hole for bolting the cable terminal to the terminal block so as to be orthogonal to the cable insertion hole, In addition, to prevent water and dust from entering the cable insertion hole and work hole, the bracket used to secure the cable to the housing is provided with packing to ensure waterproofness with the housing, and the work hole is waterproof. (See, for example, Patent Documents 1 and 2).

一方、端子台を筐体外部に露出させ、端子台と筐体内部を電気的に繋ぐ平板バスバーと端子台モールド樹脂との間にパッキンを設けた構造が提案されている（例えば、特許文献３参照）。 On the other hand, a structure has been proposed in which the terminal block is exposed to the outside of the housing, and a packing is provided between the terminal block mold resin and a flat bus bar that electrically connects the terminal block and the inside of the housing (for example, Patent Document 3 reference).

特開２００４－３２７１８５号公報JP 2004-327185 A 特開平８－２１４４９２号公報JP-A-8-214492 特開２０１０－２１１９３３号公報JP 2010-211933 A

特許文献１および２の従来例のように、筐体外部の部品と電気的に接続するための端子台を筐体内部に設けると、防水パッキン付きのケーブル固定用ブラケットや防水パッキン付きのリッドが追加部品として必要になり、さらに、メンテナンス時のケーブル端子の脱着で発生するネジ屑等の導電性異物が筐体内部に侵入し、制御回路基板やパワー半導体の端子間を短絡させることを防止するため、端子台と筐体の間を防塵構造とする必要があり、省スペース化および低コスト化の面で課題があった。 As in the conventional examples of Patent Documents 1 and 2, when a terminal block for electrically connecting to parts outside the housing is provided inside the housing, a cable fixing bracket with a waterproof packing and a lid with a waterproof packing are installed. Prevents conductive foreign matter such as screw chips, which are required as additional parts and generated when attaching and detaching cable terminals during maintenance, from entering the housing and short-circuiting between terminals of the control circuit board and power semiconductors. Therefore, it was necessary to provide a dust-proof structure between the terminal block and the housing, which posed problems in terms of space saving and cost reduction.

一方、特許文献３の従来例のように、端子台を筐体外部に露出させた構造の場合、平板バスバーと端子台のモールド樹脂の間にパッキンを設けるには、ストレート形状またはＬ字形状のような単純な形状の平板バスバーを樹脂にアウトサートした構造でなければならず、レイアウト性向上のため、複雑な形状の平板バスバーをインサートモールドした構造の場合、平板バスバーとモールド樹脂の間のシール性の確保が困難であり、端子台のレイアウト性と防水性の両立において課題があった。 On the other hand, in the case of a structure in which the terminal block is exposed to the outside of the housing as in the conventional example of Patent Document 3, a straight or L-shaped packing is required to provide packing between the flat plate bus bar and the molded resin of the terminal block. In the case of a structure in which a flat bus bar with a simple shape is outserted into resin, in the case of a structure in which a flat bus bar with a complicated shape is insert-molded in order to improve the layout, a seal between the flat bus bar and the mold resin is required. It was difficult to ensure the durability, and there was a problem in balancing the layout of the terminal block and the waterproofness.

本願は、上述のような課題を解決するためになされたものであり、省スペース化および低コスト化、レイアウト性の面で優れた平板バスバーがインサート成型された外部露出型端子台における防水構造を得ることを目的とする。 The present application has been made to solve the above-mentioned problems, and provides a waterproof structure for an externally exposed terminal block in which a flat bus bar is insert-molded, which is excellent in terms of space saving, cost reduction, and layout. with the aim of obtaining

本願に係る端子台は、複雑な形状の平板バスバーをインサートモールドすることでレイアウト性を向上させた端子台を筐体外部に露出するように設け、端子台の平板バスバーと筐体内部を電気的に接続するバスバーを円筒形状とし、円筒バスバーの先端部に外周面取り部を設け、平板バスバーと円筒バスバーの外周面取り部と端子台モールド樹脂の３面に接するようにシールリングを設けたことを特徴とする端子台である。 In the terminal block according to the present application, a flat bus bar having a complicated shape is insert-molded to improve the layout, and the terminal block is exposed to the outside of the housing, and the flat bus bar of the terminal block and the inside of the housing are electrically The bus bar connected to the terminal block has a cylindrical shape, an outer peripheral chamfered portion is provided at the tip of the cylindrical bus bar, and a seal ring is provided so as to contact the three surfaces of the flat plate bus bar, the outer peripheral chamfered portion of the cylindrical bus bar, and the terminal block mold resin. It is a terminal block that

本願の端子台の防水構造によれば、筐体外部に端子台を設けたため、省スペース化および低コスト化の面で優れている。また、複雑な形状の平板バスバーをインサートモールドした端子台のため、レイアウト性に優れ、端子台と筐体内部の連通部分を単純な形状とし、そこにシール部を設けたため、防水性能および耐塩水性に優れている。 According to the waterproof structure of the terminal block of the present application, since the terminal block is provided outside the housing, it is excellent in terms of space saving and cost reduction. In addition, since the terminal block is made by insert-molding a flat plate bus bar with a complex shape, the layout is excellent. Excellent for

本願の実施の形態１～３における電力変換装置の外観図である。1 is an external view of a power converter according to Embodiments 1 to 3 of the present application; FIG. 本願の実施の形態１～３における端子台の外観図である。FIG. 2 is an external view of a terminal block according to Embodiments 1 to 3 of the present application; 本願の実施の形態１～３における端子台のＡ－Ａ断面図である。FIG. 2 is a cross-sectional view of the terminal block taken along line AA in Embodiments 1 to 3 of the present application; 本願の実施の形態１～３における端子台のＢ－Ｂ断面図である。It is a BB cross-sectional view of the terminal block in Embodiments 1 to 3 of the present application. 本願の実施の形態１～３における端子台に設けたシールリング周辺の拡大図である。FIG. 4 is an enlarged view around a seal ring provided on the terminal block in Embodiments 1 to 3 of the present application; 本願の実施の形態２におけるシールリングの縦断面図である。FIG. 6 is a longitudinal sectional view of a seal ring according to Embodiment 2 of the present application; 本願の実施の形態３におけるシールリングの縦断面図である。FIG. 11 is a vertical cross-sectional view of a seal ring according to Embodiment 3 of the present application;

以下、図面に基づいて本願の実施の形態１について説明する。
なお、各図面中において、同一符号は同一あるいは相当のものであることを示す。
実施の形態１．
図１は、本願の実施の形態１～３における車載用電力変換装置の筐体１外観図であり、図２は筐体外部の部品と電気的に接続するための端子台２の外観図である。 Embodiment 1 of the present application will be described below based on the drawings.
In each drawing, the same reference numerals indicate the same or equivalent parts.
Embodiment 1.
FIG. 1 is an external view of a housing 1 of an in-vehicle power converter according to Embodiments 1 to 3 of the present application, and FIG. 2 is an external view of a terminal block 2 for electrically connecting to parts outside the housing. be.

図１および図２によると、筐体外部の部品と電気的に接続するための端子台２が筐体１の外部に設けられており、筐体１の壁面には、端子台と筐体内部を電気的に接続するための連通穴３が設けられ、内部と電気的に接続している。これにより、端子台を筐体内部に設けた場合に必要となる防水パッキン付きのケーブル固定用ブラケットや防水パッキン付きのリッドは不要となるため、省スペース化および低コスト化の面で優れている。 1 and 2, a terminal block 2 for electrically connecting to parts outside the housing is provided outside the housing 1. is provided with a communication hole 3 for electrically connecting to the inside. This eliminates the need for a cable fixing bracket with waterproof packing and a lid with waterproof packing, which are required when the terminal block is installed inside the housing, so it is excellent in terms of space saving and cost reduction. .

図３および図４に、端子台２のＡ－Ａ断面図、Ｂ－Ｂ断面図をそれぞれ示す。図３および図４によると、端子台２には、第１の平板バスバー４が樹脂製の端子台にインサートモールドされている。これにより、バスバーを複雑な形状とすることができ、省スペース化およびレイアウト性の面で優れている。 3 and 4 are sectional views taken along line AA and line BB of the terminal block 2, respectively. 3 and 4, the terminal block 2 has a first flat bus bar 4 insert-molded into the terminal block made of resin. This allows the bus bar to have a complicated shape, which is excellent in terms of space saving and layout.

第１の平板バスバー４の一方には、筐体外部との電気的接続部５が設けられ、電気的接続部５には、第１の平板バスバーの平面に対して垂直かつ筐体外部へ向かう第１のスタッドボルト６が圧入され、第１のナット７によって締め付けることで、筐体外部の部品から延伸するハーネスの端子８と電気的に接続している。 One side of the first flat plate bus bar 4 is provided with an electrical connection portion 5 with the outside of the housing. A first stud bolt 6 is press-fitted and tightened by a first nut 7 to electrically connect with a terminal 8 of a harness extending from a part outside the housing.

第１の平板バスバー４のもう一方には、第１の平板バスバー４の平面に対して垂直かつ筐体内部へ向かう第２のスタッドボルト９が圧入され、第２のスタッドボルト９と同軸かつ円筒状に端子台の樹脂をくり貫いた円筒樹脂穴１０を設けたことにより、筐体内部との電気的接続部１１を露出させている。 A second stud bolt 9 perpendicular to the plane of the first flat plate bus bar 4 and directed toward the inside of the housing is press-fitted into the other end of the first flat plate bus bar 4, and is coaxial with the second stud bolt 9 and cylindrical. By providing a cylindrical resin hole 10 formed by hollowing out the resin of the terminal block in a shape, an electrical connection portion 11 with the inside of the housing is exposed.

円筒樹脂穴１０には円筒バスバー１２が挿入され、円筒バスバー１２の一方は第１の平板バスバーの電気的接続部１１に接し、もう一方は連通穴３を通って、筐体内部に設けられた第２の平板バスバー１３に接しており、第２のスタッドボルト９は、円筒バスバー１２と、第２の平板バスバー１３に設けられた穴を貫通し、第２のナット１４と締結されたことにより、円筒バスバー１２を介して、第１の平板バスバー４と第２の平板バスバー１３を電気的に接続している。 A cylindrical bus bar 12 is inserted into the cylindrical resin hole 10. One side of the cylindrical bus bar 12 is in contact with the electrical connection portion 11 of the first flat plate bus bar, and the other side is provided inside the housing through the communication hole 3. The second stud bolt 9 is in contact with the second flat bus bar 13, and the second stud bolt 9 passes through the cylindrical bus bar 12 and a hole provided in the second flat plate bus bar 13, and is fastened with the second nut 14. , the first flat bus bar 4 and the second flat bus bar 13 are electrically connected via the cylindrical bus bar 12 .

図５に、第１の平板バスバーにおける筐体内部との電気的接続部１１の周辺の拡大図を示す。図５によると、連通穴３の周りの筐体と端子台が接する面には、第１のシールリング１５が設けられ、筐体内部への水や埃の侵入を防いでいる。尚、実施の形態１では、第１のシールリング１５は面シール構造となっているが、連通穴３に当接する軸シールでもよい。 FIG. 5 shows an enlarged view of the periphery of the electrical connection portion 11 with the inside of the housing in the first flat bus bar. According to FIG. 5, a first seal ring 15 is provided on the surface around the communication hole 3 where the housing and the terminal block contact to prevent water and dust from entering the housing. In Embodiment 1, the first seal ring 15 has a surface seal structure, but it may be a shaft seal that abuts on the communication hole 3 .

円筒バスバー１２の第１の平板バスバーに接する面には外周面取り部１６が設けられ、外周面取り部１６と、円筒樹脂穴１０の内径と、第１の平板バスバーにおける筐体内部との電気的接続部１１の３面に接するように第２のシールリング１７が設けられている。これにより、端子台の樹脂とバスバーの界面からの浸入してきた水が、円筒バスバー１２と電気的接続部１１の界面と、円筒バスバー１２と円筒樹脂穴１０の隙間の２方向へ浸入するのを１つのシールリングで防いでおり、シールリング搭載部分の省スペース化により円筒バスバー１２と電気的接続部１１の接触面積を最大限拡大できるため、通電抵抗が低い点で優れており、また低コスト化の面でも優れている。 An outer peripheral chamfered portion 16 is provided on the surface of the cylindrical busbar 12 that contacts the first flat busbar, and the outer peripheral chamfered portion 16, the inner diameter of the cylindrical resin hole 10, and the first flat busbar are electrically connected to the inside of the housing. A second seal ring 17 is provided so as to contact three surfaces of the portion 11 . This prevents water entering from the interface between the resin of the terminal block and the busbar from entering in two directions: the interface between the cylindrical busbar 12 and the electrical connection portion 11 and the gap between the cylindrical busbar 12 and the cylindrical resin hole 10. This is prevented by one seal ring, and the contact area between the cylindrical bus bar 12 and the electrical connection part 11 can be expanded to the maximum by saving the space of the seal ring mounting part, so it is excellent in that the current resistance is low and the cost is low. It is also excellent in terms of transformation.

第２のスタッドボルト９の圧入部最外径をφｄ、円筒バスバーの内径をφＤ１、円筒バスバーと第１の平板バスバーが接する最外径をφＤ２としたとき、Ｄ１＜ｄ＜Ｄ２の関係としている。これにより、第２のナット１４で締め付けたことにより発生した軸力が第２のスタッドボルト９の圧入部に加わるため、熱サイクルにより、第１の平板バスバー４と円筒バスバー１２と第２のスタッドボルト９が収縮または膨張しても、第１の平板バスバー４と第２のスタッドボルト９の界面における高い面圧を維持できるため、水の浸入を防ぐ効果がある。 Where φd is the outermost diameter of the press-fitting portion of the second stud bolt 9, φD1 is the inner diameter of the cylindrical bus bar, and φD2 is the outermost diameter where the cylindrical bus bar and the first flat bus bar are in contact, D1<d<D2. . As a result, the axial force generated by tightening the second nut 14 is applied to the press-fitting portion of the second stud bolt 9, so that the first flat bus bar 4, the cylindrical bus bar 12, and the second stud 4 are connected by the thermal cycle. Even if the bolt 9 shrinks or expands, the high surface pressure at the interface between the first flat bus bar 4 and the second stud bolt 9 can be maintained, thereby preventing the entry of water.

実施の形態２．
図６は、本願の実施の形態２における第２のシールリング１７の縦断面図であり、図６によると、断面は六角形とし、電気的接続部１１と面接触し、円筒樹脂穴１０の内径および外周面取り部１６には線接触させている。これにより、第１の平板バスバー４と円筒バスバー１２の接触面積を確保し、通電抵抗の抑制を図ったり、省スペース化を図るため、第２のシールリング１７の線径を小さくしても、組み立て時に円筒バスバー１２と同様の先端に外周面取り部を設けた円筒形状の挿入治具で、円筒樹脂穴１０に第２のシールリング１７を挿入すれば、挿入治具の外周面取り部と円筒樹脂穴１０で形成される溝に収まった状態で挿入されるため、第２のシールリング１７は捩れずに所定の位置に組み立てることができる。 Embodiment 2.
FIG. 6 is a vertical cross-sectional view of the second seal ring 17 according to Embodiment 2 of the present application. According to FIG. The inner and outer chamfered portions 16 are in line contact. As a result, the contact area between the first flat plate bus bar 4 and the cylindrical bus bar 12 is ensured, the current resistance is suppressed, and space is saved. When the second seal ring 17 is inserted into the cylindrical resin hole 10 using a cylindrical insertion jig provided with an outer peripheral chamfered portion at the tip similar to the cylindrical bus bar 12 at the time of assembly, the outer peripheral chamfered portion of the insertion jig and the cylindrical resin are inserted. Since it is inserted in the groove formed by the hole 10, the second seal ring 17 can be assembled in place without being twisted.

また、インサートモールドされた第１の平板バスバーと円筒樹脂穴１０の交差する箇所には、わずかな樹脂バリが内径側に発生するが、第２のシールリング１７は円筒樹脂穴１０の内径に線接触する形状で、外周面取り部１８が設けられているため、樹脂バリに乗り上げることがなく、第２のシールリング１７が安定的に電気的接続部１１と接触し、シールすることができる。 Also, at the intersection of the insert-molded first flat plate bus bar and the cylindrical resin hole 10, a small amount of resin burr occurs on the inner diameter side. Since the outer peripheral chamfered portion 18 is provided so as to have a contact shape, the second seal ring 17 can stably contact and seal the electrical connection portion 11 without riding on the resin burr.

実施の形態３．
図７は、本願の実施の形態３における第２のシールリング１７の縦断面図であり、図７によると、断面は六角形とし、面対称な形状としている。これにより、第２のシールリング１７を組み付ける際に上下方向の誤組み付けが発生しないため、品質面において優れているだけでなく、誤組み付け防止のための設備導入や、工程が不要となるため、低コスト化の面でも優れている。 Embodiment 3.
FIG. 7 is a vertical cross-sectional view of the second seal ring 17 according to Embodiment 3 of the present application. According to FIG. 7, the cross section is hexagonal and plane-symmetrical. As a result, erroneous assembly in the vertical direction does not occur when assembling the second seal ring 17, so not only is the quality excellent, but there is no need to introduce equipment or process to prevent erroneous assembly. It is also excellent in terms of cost reduction.

また、断面において、径方向より軸方向の方が幅広としたことにより、第２のシールリング１７と円筒バスバーの外周面取り部１６の線接触を可能としている。 In addition, since the cross section is wider in the axial direction than in the radial direction, line contact between the second seal ring 17 and the chamfered portion 16 of the cylindrical bus bar is enabled.

本願は、様々な例示的な実施の形態が記載されているが、１つまたは複数の実施の形態に記載された様々な特徴、態様、および機能は特定の実施の形態の適用に限られるのではなく、単独で、または様々な組み合わせで実施の形態に適用可能である。
したがって、例示されていない無数の変形例が、本願に開示される技術の範囲内において想定される。例えば、少なくとも１つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも１つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。 Although this application describes various exemplary embodiments, the various features, aspects, and functions described in one or more embodiments are limited to the application of particular embodiments. can be applied to the embodiments alone or in various combinations.
Therefore, countless modifications not illustrated are envisioned within the scope of the technology disclosed in the present application. For example, modification, addition or omission of at least one component, extraction of at least one component, and combination with components of other embodiments shall be included.

１ 筐体、２ 端子台、３ 連通穴、４ 第１の平板バスバー、５ 電気的接続部、６ 第１のスタッドボルト、７ 第１のナット、８ ハーネスの端子、９ 第２のスタッドボルト、１０ 円筒樹脂穴、１１ 電気的接続部、１２ 円筒バスバー、１３ 第２の平板バスバー、１４ 第２のナット、１５ 第１のシールリング、１６ 外周面取り部、１７ 第２のシールリング、１８ 外周面取り部。 1 housing, 2 terminal block, 3 communication hole, 4 first flat plate bus bar, 5 electrical connection, 6 first stud bolt, 7 first nut, 8 harness terminal, 9 second stud bolt, 10 cylindrical resin hole 11 electrical connection portion 12 cylindrical bus bar 13 second flat plate bus bar 14 second nut 15 first seal ring 16 outer chamfered portion 17 second seal ring 18 outer chamfered portion Department.

Claims (3)

筐体外部の部品と電気的に接続するための端子台を有する車載電力変換装置において、前記端子台は前記筐体外部に露出するように設けられており、前記筐体の壁面には前記端子台と前記筐体内部とを電気的に接続するための連通穴が設けられており、前記端子台には第１の平板バスバーが樹脂製の前記端子台にインサートモールドされており、前記第１の平板バスバーの一方には外部との電気的接続部が設けられており、もう一方には前記第１の平板バスバーの平面に対して垂直かつ前記筐体内部へ向かうスタッドボルトが圧入されており、前記スタッドボルトと同軸かつ円筒状に前記端子台の樹脂がくり貫かれた円筒樹脂穴が設けられたことにより、前記筐体内部との電気的接続部を露出させ、前記円筒樹脂穴には円筒バスバーが挿入されており、前記円筒バスバーの一方は前記第１の平板バスバーに接し、もう一方は前記連通穴を通って、前記筐体内部に設けられた第２の平板バスバーに接し、前記スタッドボルトは前記円筒バスバーと、前記第２の平板バスバーに設けられた穴を貫通し、ナットで締結されたことにより、前記円筒バスバーを介して、前記第１の平板バスバーと前記第２の平板バスバーとが電気的に接続されており、前記連通穴の周りの前記筐体と前記端子台とが接する面には第１のシールリングが設けられており、前記円筒バスバーの前記第１の平板バスバーに接する面には外周面取り部が設けられており、前記外周面取り部と前記円筒樹脂穴の内径と前記第１の平板バスバーとの３面に接するように第２のシールリングが設けられており、前記スタッドボルトの圧入部最外径をφｄ、前記円筒バスバーの内径をφＤ１、前記円筒バスバーと前記第１の平板バスバーが接する最外径をφＤ２としたとき、Ｄ１＜ｄ＜Ｄ２の関係としたことを特徴とする端子台。 In an in-vehicle power conversion device having a terminal block for electrically connecting to parts outside the housing, the terminal block is provided so as to be exposed to the outside of the housing, and the terminal is provided on the wall surface of the housing. A communication hole is provided for electrically connecting the base and the inside of the housing, and a first flat bus bar is insert-molded in the terminal block made of resin in the terminal block. One of the flat plate busbars is provided with an electrical connection with the outside, and the other is press-fitted with a stud bolt perpendicular to the plane of the first flat plate busbar and directed to the inside of the housing. A cylindrical resin hole formed by hollowing out the resin of the terminal block is provided coaxially with the stud bolt in a cylindrical shape, thereby exposing an electrical connection portion with the inside of the housing. A cylindrical bus bar is inserted, one of the cylindrical bus bars is in contact with the first flat bus bar, the other is in contact with the second flat bus bar provided inside the housing through the communication hole, and the Stud bolts pass through holes provided in the cylindrical bus bar and the second flat plate bus bar and are fastened with nuts to connect the first flat plate bus bar and the second flat plate bus bar via the cylindrical bus bar. A bus bar is electrically connected, a first seal ring is provided on a surface around the communication hole where the housing and the terminal block are in contact, and the first flat plate of the cylindrical bus bar is provided. An outer peripheral chamfered portion is provided on a surface in contact with the busbar, and a second seal ring is provided so as to be in contact with three surfaces of the outer peripheral chamfered portion, the inner diameter of the cylindrical resin hole, and the first flat busbar. Where φd is the outermost diameter of the press-fitting portion of the stud bolt, φD1 is the inner diameter of the cylindrical bus bar, and φD2 is the outermost diameter where the cylindrical bus bar and the first flat bus bar are in contact, D1<d<D2. A terminal block characterized by: 前記第２のシールリングは、前記第１の平板バスバーと面接触し、前記円筒樹脂穴の内径および前記円筒バスバーの前記外周面取り部には線接触させたことを特徴とした請求項１に記載の端子台。 2. The second seal ring according to claim 1, wherein the second seal ring is in surface contact with the first flat plate bus bar, and is in line contact with the inner diameter of the cylindrical resin hole and the outer chamfered portion of the cylindrical bus bar. terminal block. 前記第２のシールリングの断面は六角形とし、面対称な形状としたことを特徴とした請求項１または請求項２に記載の端子台。 3. The terminal block according to claim 1, wherein said second seal ring has a hexagonal cross section and is plane-symmetrical.
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