WO2019176475A1 - Electric compressor - Google Patents

Electric compressor Download PDF

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Publication number
WO2019176475A1
WO2019176475A1 PCT/JP2019/006177 JP2019006177W WO2019176475A1 WO 2019176475 A1 WO2019176475 A1 WO 2019176475A1 JP 2019006177 W JP2019006177 W JP 2019006177W WO 2019176475 A1 WO2019176475 A1 WO 2019176475A1
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WO
WIPO (PCT)
Prior art keywords
housing
metal plate
adjacent housings
housings
electric compressor
Prior art date
Application number
PCT/JP2019/006177
Other languages
French (fr)
Japanese (ja)
Inventor
弘毅 工藤
政博 菊池
Original Assignee
サンデン・オートモーティブコンポーネント株式会社
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Publication of WO2019176475A1 publication Critical patent/WO2019176475A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the present invention relates to an electric compressor used in, for example, a vehicle air conditioner, and the like, and relates to an electric compressor in which a compression mechanism, an electric motor that drives the compression mechanism, and an inverter for driving the electric motor are integrated. .
  • a housing that houses an electric motor and an inverter, an inverter cover that is attached to the housing, and an insulating seal that is disposed between the housing and the inverter cover
  • the housing and the inverter cover are electrically connected to each other through a protrusion formed on at least one of the housing and the inverter cover. Is connected.
  • the potential difference generated between the housing and the inverter cover is reduced by bringing the housing and the inverter cover into direct metal contact.
  • an embodiment of the present invention includes a compression mechanism that compresses a refrigerant, an electric motor that is a driving source of the compression mechanism, and a plurality of metal housings, and two adjacent housings are insulated. It is the electric compressor connected through the sex gasket.
  • the housing accommodates the compression mechanism, the electric motor, and the inverter.
  • the electric compressor includes a metal plate whose one end is fixed to one of the two adjacent housings and whose other end contacts the other of the two adjacent housings when the two adjacent housings are connected. .
  • Two adjacent housings are connected metallically via a metal plate.
  • the metal plate is formed in a shape that is elastically deformed when two adjacent housings are connected.
  • two adjacent housings are electrically connected via a metal plate.
  • the metal plate is formed in a shape that elastically deforms when two adjacent housings are connected, so even if there are variations in tolerance between the two adjacent housings and gaskets, poor contact It becomes possible to suppress such troubles. As a result, it is possible to provide an electric compressor that can stably reduce a potential difference generated between two adjacent housings.
  • FIG. 10 is a perspective view taken along line X in FIG. 9. It is a perspective view along the XI line of FIG. It is sectional drawing of the connection part which connected two adjacent housings.
  • the electric compressor 1 includes a compression mechanism (not shown), an electric motor (not shown), an inverter (not shown), and a plurality of housings (first housing 10, A second housing 20, a third housing 30) and a metal plate 40 are provided.
  • the compression mechanism is a mechanism that compresses the refrigerant sucked from the outside and discharges the refrigerant to the outside, and is accommodated in the first housing 10. Therefore, the first housing 10 forms a compressor case that houses the compression mechanism.
  • the first housing 10 is formed with a refrigerant suction port (not shown) and a refrigerant discharge port (not shown).
  • the electric motor is a drive source for the compression mechanism and is accommodated in the second housing 20. Therefore, the second housing 20 forms a motor case that houses the electric motor.
  • the inverter is configured to drive an electric motor and is accommodated in the third housing 30. Therefore, the third housing 30 forms an inverter case that houses the inverter.
  • the first housing 10, the second housing 20, and the third housing 30 are each formed using a metal material such as aluminum.
  • the first housing 10, the second housing 20, and the third housing 30 are fastened using a plurality of fixing bolts 50.
  • the 1st housing 10, the 2nd housing 20, and the 3rd housing 30 are each provided with the internal peripheral surface which surrounds the target object (a compression mechanism, an electric motor, an inverter) to accommodate.
  • the fixing bolts 50 are arranged at intervals along the circumferential direction of the rotating shaft of the electric motor.
  • the adjacent first housing 10 and second housing 20 are connected via an insulating gasket 60.
  • the adjacent 2nd housing 20 and the 3rd housing 30 are also connected through the insulating gasket.
  • the gasket 60 has a through hole through which the fixing bolt 50 passes.
  • the third housing 30 includes a housing space for housing the inverter. The accommodation space is closed by the inverter cover 70.
  • the metal plate 40 is a metal plate member. Moreover, the metal plate 40 is provided with the attachment part 42 and the bead part 44 as represented in FIGS. 2-5.
  • the attachment portion 42 is formed on one end side of the metal plate 40, and a bolt insertion hole 42a is formed.
  • the bolt insertion hole 42 a is a through hole that penetrates the metal plate 40, and the shaft portion of the mounting bolt 80 passes therethrough.
  • the attachment bolt 80 is a bolt that attaches the metal plate 40 to the first housing 10. Therefore, one end side of the metal plate 40 is fixed to one of the two adjacent housings (the first housing 10 and the second housing 20) (the first housing 10).
  • the bead portion 44 is formed on the other end side of the metal plate 40, and when two adjacent housings are connected, in the vicinity of one of the two adjacent fixing bolts 50a and 50b (fixing bolt 50a), It contacts the other housing (second housing 20).
  • the vicinity of the fixing bolt 50a is, for example, a position closer to the fixing bolt 50a than an intermediate position between the fixing bolt 50a and the fixing bolt 50b.
  • the position at which the bead portion 44 contacts the second housing 20, that is, the position in the vicinity of the fixing bolt 50 a, and the distance between the bead portion 44 and the shaft portion of the fixing bolt 50 a is 5 [ mm].
  • the position in the vicinity of the fixing bolt 50a is not limited to the above position. That is, the distance between the bead portion 44 and the shaft portion of the fixing bolt 50a is set, for example, to a position within 1/4 of the distance from the fixing bolt 50a to the intermediate position between the fixing bolt 50a and the fixing bolt 50b. May be.
  • the distance between the bead portion 44 and the shaft portion of the fixing bolt 50a is set to a position within 1/2 of the distance from the fixing bolt 50a to the intermediate position between the fixing bolt 50a and the fixing bolt 50b. May be.
  • the bead part 44 is provided with the plane part 44a, the inclined surface part 44b, and the protrusion surface part 44c.
  • the flat surface portion 44 a is continuous with the attachment portion 42.
  • the inclined surface portion 44b is continuous with the flat surface portion 44a, and is inclined with respect to the flat surface portion 44a toward the second housing 20 as the distance from the flat surface portion 44a increases.
  • the protruding surface portion 44c is continuous with the inclined surface portion 44b and protrudes toward the second housing 20 from the flat surface portion 44a.
  • the bead portion 44 comes into contact with the second housing 20 while being sandwiched between the gasket 60 and the second housing 20 when two adjacent housings are connected. Therefore, the other end side of the metal plate 40 contacts the other housing of the two adjacent housings when the two adjacent housings are connected. Further, the bead portion 44 sandwiched between the gasket 60 and the second housing 20 has a restoring force in a direction in which the inclined surface portion 44b and the protruding surface portion 44c are elastically deformed to separate two adjacent housings. It becomes. Therefore, the metal plate 40 is formed in a shape that is elastically deformed when two adjacent housings are connected. (Operation / Action) With reference to FIGS.
  • the first housing 10 and the second housing 20 are electrically connected via the metal plate 40, and the potential difference generated between the first housing 10 and the second housing 20 is reduced.
  • the metal plate 40 forms an electrical connection portion that eliminates a potential difference generated between the first housing 10 and the second housing 20.
  • the metal plate 40 that electrically connects the first housing 10 and the second housing 20 is formed in a shape that is elastically deformed when two adjacent housings are connected. For this reason, even if the tolerances of the first housing 10, the second housing 20, and the gasket 60 are varied, it is possible to suppress problems such as poor contact.
  • the above-described first embodiment is an example of the present invention, and the present invention is not limited to the above-described first embodiment, and the present invention may be applied to other forms than this embodiment. Various modifications can be made according to the design or the like as long as they do not depart from the technical idea. (Effects of the first embodiment) If it is the electric compressor 1 of 1st embodiment, it will become possible to show the effect described below. (1) One end side of the metal plate 40 is fixed to one of the two adjacent housings, and the other end side of the metal plate 40 contacts the other of the two adjacent housings when the two adjacent housings are connected. .
  • two adjacent housings are metallicly connected via a metal plate 40, and the metal plate 40 is formed in a shape that is elastically deformed when the two adjacent housings are connected. For this reason, the first housing 10 and the second housing 20 are electrically connected via the metal plate 40.
  • the metal plate 40 is formed in a shape that is elastically deformed when two adjacent housings are connected, even if there is a variation in tolerance between the two adjacent housings or the gasket 60. It is possible to suppress problems such as poor contact. As a result, it is possible to provide the electric compressor 1 that can stably reduce a potential difference generated between two adjacent housings.
  • the metal plate 40 includes a bead portion 44 that is formed on the other end side of the metal plate 40 and protrudes toward the other housing (second housing 20). In addition, when the two adjacent housings are connected, the bead portion 44 contacts the second housing 20 while being sandwiched between the gasket 60 and the other housing (second housing 20).
  • the bead portion 44 allows the metal plate 40 to have a height along the thickness direction of the metal plate 40 in a portion sandwiched between the gasket 60 and the second housing 20. Accordingly, when the bead portion 44 is disposed between the second housing 20 and the gasket 60 and the first housing 10 and the second housing 20 are fastened using the fixing bolt 50, the inclined surface portion 44b and the protruding surface portion 44c are elastic. Deform. And the bead part 44 of the state pinched
  • One housing and the other housing are fastened by using a plurality of fixing bolts 50 arranged at intervals.
  • the other end of the metal plate 40 contacts the other housing in the vicinity of one of the two adjacent fixing bolts 50.
  • the other end side of the metal plate 40 is configured not to be continuous in the circumferential direction of the housing included in the electric compressor 1, so that the pressing force of the metal plate 40 on the gasket 60 (tightening pressure of the gasket 60) is reduced. It becomes possible to suppress.
  • the electric compressor 1 includes a compression mechanism (not shown), an electric motor (not shown), an inverter (not shown), and a plurality of housings (first housing 10, A second housing 20, a third housing 30) and a metal plate 40 are provided.
  • the configurations of the compression mechanism, the electric motor, the inverter, the first housing 10, the second housing 20, and the third housing 30 are the same as those in the first embodiment described above.
  • the metal plate 40 is a metal plate-like member, and includes a mounting portion 42 and a contact portion 46 as shown in FIGS. 8 to 11.
  • the attachment portion 42 is formed on one end side of the metal plate 40, and a bolt insertion hole 42a is formed.
  • the bolt insertion hole 42 a is a through hole that penetrates the metal plate 40, and the attachment bolt 80 penetrates therethrough.
  • the attachment bolt 80 is a bolt that attaches the metal plate 40 to the first housing 10 as in the first embodiment.
  • one end side of the metal plate 40 is fixed to one of the two adjacent housings (the first housing 10 and the second housing 20) (the first housing 10).
  • the contact portion 46 is formed on the other end side of the metal plate 40 and has a shape that functions as a leaf spring with the attachment portion 42 as a fulcrum. Specifically, as shown in FIG. 12, when the two adjacent housings are connected, the contact portion 46 is formed in a shape that is elastically deformed while being pressed from the inner peripheral surface 20a of the other housing. Has been. Therefore, when the two adjacent housings are connected, the other end side of the metal plate 40 comes into contact with the other housing while being elastically deformed while being pushed from the inner peripheral surface 20a of the other housing.
  • the guide part 48 which forms the other end of the metal plate 40 among the contact parts 46 is inclined toward the central axis side of the second housing 20 with respect to the inner peripheral surface 20 a included in the second housing 20. Further, as shown in FIG. 12, the entire metal plate 40 is not exposed to the outside of the two housings when the two adjacent housings are connected.
  • the refrigerant low pressure refrigerant
  • the compressed refrigerant high pressure refrigerant
  • one end side of the metal plate 40 is fixed to the first housing 10 which is one housing.
  • the other end side of the metal plate 40 is in contact with the second housing 20 which is the other housing. For this reason, the first housing 10 and the second housing 20 are electrically connected via the metal plate 40, and the potential difference generated between the first housing 10 and the second housing 20 is reduced. Is possible.
  • the metal plate 40 forms an electrical connection portion that eliminates a potential difference generated between the first housing 10 and the second housing 20. Further, the metal plate 40 that electrically connects the first housing 10 and the second housing 20 is formed in a shape that is elastically deformed when two adjacent housings are connected. For this reason, even if the tolerances of the first housing 10, the second housing 20, and the gasket 60 are varied, it is possible to suppress problems such as poor contact.
  • the above-described second embodiment is an example of the present invention, and the present invention is not limited to the above-described second embodiment, and the present invention may be applied to other forms than this embodiment. Various modifications can be made according to the design or the like as long as they do not depart from the technical idea.
  • the metal plate 40 can be prevented from touching the outside air, so that the corrosion of the metal plate 40 can be suppressed, and the potential difference generated between the first housing 10 and the second housing 20. Can be stably reduced.
  • the guide portion 48 that forms the other end of the metal plate 40 is inclined toward the central axis side of the second housing 20 with respect to the inner peripheral surface 20 a included in the second housing 20. As a result, when the first housing 10 and the second housing 20 are combined, the guide portion 48 enters the center axis side of the second housing 20 rather than the inner peripheral surface 20a. The work of combining 20 becomes easy.
  • SYMBOLS 1 Electric compressor, 10 ... 1st housing, 20 ... 2nd housing, 20a ... Inner peripheral surface of 2nd housing, 30 ... 3rd housing, 40 ... Metal plate, 42 ... Mounting part, 42a ... Bolt insertion hole, 44 ... Bead part, 44a ... Plane part, 44b ... Inclined surface part, 44c ... Projection surface part, 46 ... Contact part, 48 ... Guide part, 50 ... Fixing bolt, 60 ... Gasket, 70 ... Inverter cover, 80 ... Mounting bolt

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

Provided is an electric compressor that enables an electric potential difference generated between two adjacent housings to be reduced in a stable manner. An electric compressor 1 comprises: a compressing mechanism that compresses a refrigerant; an electric motor serving as a drive source of the compressing mechanism; an inverter for driving the electric motor; and a plurality of metal housings enclosing the compressing mechanism, the electric motor, and the inverter, two adjacent housings being connected through an insulating gasket 60. The electric compressor further comprises a metal plate 40 having one end fixed to a first housing 10, which is one of the two adjacent housings, and the other end arranged to contact a second housing 20, which is the other of the two adjacent housings, when the two adjacent housings are connected together. The two adjacent housings are metallically connected through the metal plate 40, and the metal plate 40 is formed to have a shape that undergoes elastic deformation when the two adjacent housings are connected.

Description

電動圧縮機Electric compressor
　本発明は、例えば、車両用の空調装置等に用いる電動圧縮機であり、圧縮機構と、圧縮機構を駆動する電動モータと、電動モータを駆動するためのインバータが一体化された電動圧縮機に関する。 The present invention relates to an electric compressor used in, for example, a vehicle air conditioner, and the like, and relates to an electric compressor in which a compression mechanism, an electric motor that drives the compression mechanism, and an inverter for driving the electric motor are integrated. .
　電動圧縮機としては、例えば、特許文献１に記載されているように、電動モータとインバータを収容するハウジングと、ハウジングに取り付けるインバータカバーと、ハウジングとインバータカバーとの間に配置される絶縁性シール部材を備えるものがある。
　そして、特許文献１に記載されている電動圧縮機では、ハウジングとインバータカバーを、ハウジング及びインバータカバーのうち少なくとも一方に形成された凸部を介して接触させることで、ハウジングとインバータカバーを電気的に接続させている。これにより、ハウジングとインバータカバーを直接的に金属接触させることで、ハウジングとインバータカバー（二つのハウジング）で発生する電位差を減少させる。 As an electric compressor, for example, as described in Patent Document 1, a housing that houses an electric motor and an inverter, an inverter cover that is attached to the housing, and an insulating seal that is disposed between the housing and the inverter cover Some have members.
In the electric compressor described in Patent Document 1, the housing and the inverter cover are electrically connected to each other through a protrusion formed on at least one of the housing and the inverter cover. Is connected. Thus, the potential difference generated between the housing and the inverter cover (two housings) is reduced by bringing the housing and the inverter cover into direct metal contact.
特開２０１５−１７５７７号公報Japanese Unexamined Patent Publication No. 2015-17777
　しかしながら、特許文献１に記載されている電動圧縮機では、ハウジング、インバータカバー、絶縁性シール部材の公差にばらつきがある場合や、凸部の位置によって、凸部の強度低下や、接触不良等の不具合が発生する可能性がある。このため、二つのハウジングで発生する電位差を、安定して減少させることが困難であるという問題点がある。
　本発明は、上記のような問題点に着目してなされたもので、隣り合う二つのハウジングで発生する電位差を安定して減少させることが可能な、電動圧縮機を提供することを目的とする。 However, in the electric compressor described in Patent Document 1, when the tolerances of the housing, the inverter cover, and the insulating seal member are varied, depending on the position of the convex portion, the strength of the convex portion is reduced, the contact failure, etc. A malfunction may occur. For this reason, there is a problem that it is difficult to stably reduce the potential difference generated between the two housings.
The present invention has been made paying attention to the above-described problems, and an object thereof is to provide an electric compressor capable of stably reducing a potential difference generated between two adjacent housings. .
　上記課題を解決するために、本発明の一態様は、冷媒を圧縮する圧縮機構と、圧縮機構の駆動源となる電動モータと、複数の金属製のハウジングを備え、隣り合う二つのハウジングが絶縁性のガスケットを介して接続された電動圧縮機である。ハウジングは、圧縮機構、電動モータ及びインバータを収容する。これに加え、電動圧縮機は、隣り合う二つのハウジングの一方に一端側が固定され、隣り合う二つのハウジングを接続したときに、隣り合う二つのハウジングの他方に他端側が接触する金属プレートを備える。そして、隣り合う二つのハウジングは、金属プレートを介して金属的に接続されている。また、金属プレートは、隣り合う二つのハウジングを接続したときに弾性変形する形状に形成されている。 In order to solve the above-described problem, an embodiment of the present invention includes a compression mechanism that compresses a refrigerant, an electric motor that is a driving source of the compression mechanism, and a plurality of metal housings, and two adjacent housings are insulated. It is the electric compressor connected through the sex gasket. The housing accommodates the compression mechanism, the electric motor, and the inverter. In addition, the electric compressor includes a metal plate whose one end is fixed to one of the two adjacent housings and whose other end contacts the other of the two adjacent housings when the two adjacent housings are connected. . Two adjacent housings are connected metallically via a metal plate. The metal plate is formed in a shape that is elastically deformed when two adjacent housings are connected.
　本発明の一態様によれば、隣り合う二つのハウジングが、金属プレートを介して電気的に接続される。これに加え、金属プレートが、隣り合う二つのハウジングを接続したときに弾性変形する形状に形成されているため、隣り合う二つのハウジングやガスケットの公差にばらつきがある場合であっても、接触不良等の不具合を抑制することが可能となる。
　その結果、隣り合う二つのハウジングの間に発生する電位差を、安定して減少させることが可能な、電動圧縮機を提供することが可能となる。 According to one aspect of the present invention, two adjacent housings are electrically connected via a metal plate. In addition to this, the metal plate is formed in a shape that elastically deforms when two adjacent housings are connected, so even if there are variations in tolerance between the two adjacent housings and gaskets, poor contact It becomes possible to suppress such troubles.
As a result, it is possible to provide an electric compressor that can stably reduce a potential difference generated between two adjacent housings.
本発明の第一実施形態における電動圧縮機の構成を表す分解図である。It is an exploded view showing the composition of the electric compressor in a first embodiment of the present invention. 第一実施形態の電動圧縮機が備える金属プレートを表す平面図である。It is a top view showing the metal plate with which the electric compressor of a first embodiment is provided. 図２のＩＩＩ−ＩＩＩ線断面図である。It is the III-III sectional view taken on the line of FIG. 図３のＩＶ線に沿った斜視図である。FIG. 4 is a perspective view taken along line IV in FIG. 3. 図４のＶ線に沿った斜視図である。FIG. 5 is a perspective view taken along line V in FIG. 4. 隣り合う二つのハウジングを接続した接続部分の断面図である。It is sectional drawing of the connection part which connected two adjacent housings. 本発明の第二実施形態における電動圧縮機の構成を表す分解図である。It is an exploded view showing the structure of the electric compressor in 2nd embodiment of this invention. 第二実施形態の電動圧縮機が備える金属プレートを表す平面図である。It is a top view showing the metal plate with which the electric compressor of a second embodiment is provided. 図８のＩＸ−ＩＸ線断面図である。It is the IX-IX sectional view taken on the line of FIG. 図９のＸ線に沿った斜視図である。FIG. 10 is a perspective view taken along line X in FIG. 9. 図１０のＸＩ線に沿った斜視図である。It is a perspective view along the XI line of FIG. 隣り合う二つのハウジングを接続した接続部分の断面図である。It is sectional drawing of the connection part which connected two adjacent housings.
　図面を参照して、本発明の第一実施形態を以下において説明する。以下の説明で参照する図面の記載において、同一または類似の部分には、同一または類似の符号を付している。ただし、図面は模式的なものであり、厚さと平面寸法との関係や、各層の厚さの比率等は、現実のものとは異なることに留意すべきである。したがって、具体的な厚さや寸法は、以下の説明を参酌して判断すべきものである。また、図面相互間においても、互いの寸法の関係や比率が異なる部分が含まれていることは勿論である。
　さらに、以下に示す第一実施形態は、本発明の技術的思想を具体化するための構成を例示するものであって、本発明の技術的思想は、構成部品の材質や、それらの形状、構造、配置等を下記のものに特定するものではない。本発明の技術的思想は、特許請求の範囲に記載された請求項が規定する技術的範囲内において、種々の変更を加えることが可能である。また、以下の説明における「左右」や「上下」の方向は、単に説明の便宜上の定義であって、本発明の技術的思想を限定するものではない。よって、例えば、紙面を９０度回転すれば「左右」と「上下」とは交換して読まれ、紙面を１８０度回転すれば「左」が「右」になり、「右」が「左」になることは勿論である。
（第一実施形態）
　以下、本発明の第一実施形態について、図面を参照しつつ説明する。
（構成）
　図１中に表すように、電動圧縮機１は、圧縮機構（図示せず）と、電動モータ（図示せず）と、インバータ（図示せず）と、複数のハウジング（第一ハウジング１０と、第二ハウジング２０と、第三ハウジング３０）と、金属プレート４０を備える。
　圧縮機構は、外部から吸入した冷媒を圧縮して外部へ吐出する機構であり、第一ハウジング１０の内部に収容されている。したがって、第一ハウジング１０は、圧縮機構を収容するコンプレッサケースを形成している。また、第一ハウジング１０には、冷媒の吸入ポート（図示せず）と、冷媒の吐出ポート（図示せず）が形成されている。
　電動モータは、圧縮機構の駆動源であり、第二ハウジング２０の内部に収容されている。したがって、第二ハウジング２０は、電動モータを収容するモータケースを形成している。
　インバータは、電動モータを駆動する構成であり、第三ハウジング３０の内部に収容されている。したがって、第三ハウジング３０は、インバータを収容するインバータケースを形成している。
　第一ハウジング１０と、第二ハウジング２０と、第三ハウジング３０は、それぞれ、アルミニウム等の金属製材料を用いて形成されている。
　また、第一ハウジング１０と、第二ハウジング２０と、第三ハウジング３０は、複数本の固定ボルト５０を用いて締結されている。さらに、第一ハウジング１０と、第二ハウジング２０と、第三ハウジング３０は、それぞれ、収容する対象物（圧縮機構、電動モータ、インバータ）を包囲する内周面を備えている。
　各固定ボルト５０は、電動モータの回転軸の周方向に沿って、間隔を空けて配置されている。
　隣り合う第一ハウジング１０と第二ハウジング２０は、絶縁性のガスケット６０を介して接続されている。また、図示を省略するが、隣り合う第二ハウジング２０と第三ハウジング３０も、絶縁性のガスケットを介して接続されている。なお、ガスケット６０には、固定ボルト５０が貫通する貫通孔が形成されている。
　第三ハウジング３０は、インバータを収容する収容空間を備えている。収容空間は、インバータカバー７０によって閉塞されている。
　金属プレート４０は、金属製の板状部材である。
　また、金属プレート４０は、図２から図５中に表すように、取り付け部４２と、ビード部４４を備えている。
　取り付け部４２は、金属プレート４０の一端側に形成されており、ボルト挿通孔４２ａが形成されている。
　ボルト挿通孔４２ａは、金属プレート４０を貫通する貫通孔であり、取り付けボルト８０の軸部が貫通する。
　取り付けボルト８０は、金属プレート４０を第一ハウジング１０に取り付けるボルトである。したがって、金属プレート４０の一端側は、隣り合う二つのハウジング（第一ハウジング１０と第二ハウジング２０）のうち、一方のハウジング（第一ハウジング１０）に固定される。
　ビード部４４は、金属プレート４０の他端側に形成されており、隣り合う二つのハウジングを接続したときに、隣り合う二つの固定ボルト５０ａ，５０ｂのうち一方（固定ボルト５０ａ）の近傍で、他方のハウジング（第二ハウジング２０）に接触する。
　ここで、固定ボルト５０ａの近傍とは、例えば、固定ボルト５０ａと固定ボルト５０ｂとの中間の位置よりも、固定ボルト５０ａに近い位置である。
　第一実施形態では、一例として、ビード部４４が第二ハウジング２０に接触する位置、すなわち、固定ボルト５０ａの近傍の位置を、ビード部４４と固定ボルト５０ａの軸部との距離が、５［ｍｍ］以内となる位置に設定する。
　なお、固定ボルト５０ａの近傍の位置は、上記の位置に限定するものではない。すなわち、ビード部４４と固定ボルト５０ａの軸部との距離が、例えば、固定ボルト５０ａから、固定ボルト５０ａと固定ボルト５０ｂとの中間の位置までの距離の、１／４以内となる位置に設定してもよい。また、例えば、ビード部４４と固定ボルト５０ａの軸部との距離が、固定ボルト５０ａから、固定ボルト５０ａと固定ボルト５０ｂとの中間の位置までの距離の、１／２以内となる位置に設定してもよい。
　また、ビード部４４は、平面部４４ａと、傾斜面部４４ｂと、突出面部４４ｃを備える。
　平面部４４ａは、取り付け部４２と連続している。
　傾斜面部４４ｂは、平面部４４ａと連続しており、平面部４４ａに対し、平面部４４ａから離れるにつれて、第二ハウジング２０へ近づく方向へ傾斜している。
　突出面部４４ｃは、傾斜面部４４ｂと連続しており、平面部４４ａよりも第二ハウジング２０の側へ突出している。
　また、ビード部４４は、図６中に示すように、隣り合う二つのハウジングを接続したときに、ガスケット６０と第二ハウジング２０とに挟まれた状態で、第二ハウジング２０と接触する。
　したがって、金属プレート４０の他端側は、隣り合う二つのハウジングを接続したときに、隣り合う二つのハウジングの他方のハウジングに接触する。
　また、ガスケット６０と第二ハウジング２０とに挟まれた状態のビード部４４は、傾斜面部４４ｂ及び突出面部４４ｃが弾性変形して、隣り合う二つのハウジングを離間させる方向への復元力を有することとなる。
　したがって、金属プレート４０は、隣り合う二つのハウジングを接続したときに、弾性変形する形状に形成されている。
（動作・作用）
　図１から図６を参照して、第一実施形態の電動圧縮機１で行う動作の一例と、作用を説明する。
　電動圧縮機１の使用時には、インバータによって電動モータが駆動され、電動モータが有する駆動軸を介して、圧縮機構が駆動する。圧縮機構が駆動すると、冷媒（低圧冷媒）を、吸入ポートから吸入して圧縮し、圧縮した冷媒（高圧冷媒）を、吐出ポートから吐出する。
　ここで、第一実施形態の電動圧縮機１は、金属プレート４０の一端側が、一方のハウジングである第一ハウジング１０に固定されている。これに加え、隣り合う二つのハウジングを接続したときに、金属プレート４０の他端側が、他方のハウジングである第二ハウジング２０に接触している。
　このため、第一ハウジング１０と第二ハウジング２０は、金属プレート４０を介して電気的に接続されることとなり、第一ハウジング１０と第二ハウジング２０との間に発生する電位差を、減少させることが可能となる。
　すなわち、金属プレート４０が、第一ハウジング１０と第二ハウジング２０との間に発生する電位差を解消する電気的接続部を形成することとなる。
　また、第一ハウジング１０と第二ハウジング２０を、電気的に接続する金属プレート４０が、隣り合う二つのハウジングを接続したときに弾性変形する形状に形成されている。
　このため、第一ハウジング１０、第二ハウジング２０、ガスケット６０の公差にばらつきがある場合であっても、接触不良等の不具合を抑制することが可能となる。
　なお、上述した第一実施形態は、本発明の一例であり、本発明は、上述した第一実施形態に限定されることはなく、この実施形態以外の形態であっても、本発明に係る技術的思想を逸脱しない範囲であれば、設計等に応じて種々の変更が可能である。
（第一実施形態の効果）
　第一実施形態の電動圧縮機１であれば、以下に記載する効果を奏することが可能となる。
（１）金属プレート４０の一端側が、隣り合う二つのハウジングの一方に固定され、金属プレート４０の他端側が、隣り合う二つのハウジングを接続したときに、隣り合う二つのハウジングの他方に接触する。これに加え、隣り合う二つのハウジングが、金属プレート４０を介して金属的に接続されており、金属プレート４０が、隣り合う二つのハウジングを接続したときに弾性変形する形状に形成されている。
　このため、第一ハウジング１０と第二ハウジング２０が、金属プレート４０を介して電気的に接続される。これに加え、金属プレート４０が、隣り合う二つのハウジングを接続したときに弾性変形する形状に形成されているため、隣り合う二つのハウジングや、ガスケット６０の公差にばらつきがある場合であっても、接触不良等の不具合を抑制することが可能となる。
　その結果、隣り合う二つのハウジングの間に発生する電位差を、安定して減少させることが可能な、電動圧縮機１を提供することが可能となる。
　また、隣り合う二つのハウジングの間に発生する電位差を、安定して減少させることが可能となるため、漏電等を抑制することが可能となり、電動圧縮機１の安全性を向上させることが可能となる。
　さらに、隣り合う二つのハウジングの間に発生する電位差を、安定して減少させることが可能となるため、隣り合う二つのハウジングの間に存在する抵抗値を確認するために作成する、試作品の製造コストを低減させることが可能となる。
（２）金属プレート４０が、金属プレート４０の他端側に形成され、且つ他方のハウジング（第二ハウジング２０）へ向けて突出するビード部４４を備える。これに加え、ビード部４４が、隣り合う二つのハウジングを接続したときに、ガスケット６０と他方のハウジング（第二ハウジング２０）とに挟まれた状態で、第二ハウジング２０と接触する。
　このため、ビード部４４により、金属プレート４０のうち、ガスケット６０と第二ハウジング２０とに挟まれる部分に、金属プレート４０の厚さ方向に沿った高さを出すことが可能となる。これにより、ビード部４４を第二ハウジング２０とガスケット６０との間に配置し、固定ボルト５０を用いて、第一ハウジング１０と第二ハウジング２０を締結すると、傾斜面部４４ｂ及び突出面部４４ｃが弾性変形する。そして、ガスケット６０と第二ハウジング２０とに挟まれた状態のビード部４４が、隣り合う二つのハウジングを離間させる方向への復元力を有することとなる。
　その結果、ビード部４４とガスケット６０及び第二ハウジング２０との接触状態を安定して確保することが可能となる。これにより、第一ハウジング１０と第二ハウジング２０との接触圧が過剰となることや、ガスケット６０の面圧が低下してシール性能が低下することを、抑制することが可能となる。
（３）一方のハウジングと他方のハウジングが、間隔を空けて配置された複数本の固定ボルト５０を用いて締結されている。これに加え、金属プレート４０の他端側が、隣り合う二つのハウジングを接続したときに、隣り合う二つの固定ボルト５０のうち一方の近傍で、他方のハウジングに接触する。
　その結果、金属プレート４０の他端側が、電動圧縮機１が備えるハウジングの周方向に連続しない構成となるため、金属プレート４０のガスケット６０への押し付け力（ガスケット６０の締付圧力）の低下を抑制することが可能となる。
（第一実施形態の変形例）
（１）第一実施形態では、金属プレート４０の一端側が第一ハウジング１０に固定され、金属プレート４０の他端側が第二ハウジング２０に接触する構成としたが、これに限定するものではない。すなわち、金属プレート４０の一端側が第二ハウジング２０に固定され、金属プレート４０の他端側が第三ハウジング３０に接触する構成としてもよい。
　この場合、第二ハウジング２０と第三ハウジング３０を、金属プレート４０を介して電気的に接続することで、第二ハウジング２０と第三ハウジング３０との間に発生する電位差を安定して減少させることが可能となり、ノイズの混入や発生が抑制される。これにより、すなわち、外部からインバータへのノイズの流入や、インバータで発生したノイズの外部への流出を抑制することが可能となる。
（２）第一実施形態では、金属プレート４０の一端側が第一ハウジング１０に固定され、金属プレート４０の他端側が第二ハウジング２０に接触する構成としたが、これに限定するものではない。すなわち、金属プレート４０の一端側が第二ハウジング２０に固定され、金属プレート４０の他端側が第一ハウジング１０に接触する構成としてもよい。
（第二実施形態）
　以下、本発明の第二実施形態について、図面を参照しつつ説明する。
（構成）
　図７中に表すように、電動圧縮機１は、圧縮機構（図示せず）と、電動モータ（図示せず）と、インバータ（図示せず）と、複数のハウジング（第一ハウジング１０と、第二ハウジング２０と、第三ハウジング３０）と、金属プレート４０を備える。
　圧縮機構と、電動モータと、インバータと、第一ハウジング１０と、第二ハウジング２０と、第三ハウジング３０の構成は、上述した第一実施形態と同様である。
　金属プレート４０は、金属製の板状部材であり、図８から図１１中に表すように、取り付け部４２と、接触部４６を備えている。
　取り付け部４２は、金属プレート４０の一端側に形成されており、ボルト挿通孔４２ａが形成されている。
　ボルト挿通孔４２ａは、金属プレート４０を貫通する貫通孔であり、取り付けボルト８０が貫通する。
　取り付けボルト８０は、第一実施形態と同様、金属プレート４０を第一ハウジング１０に取り付けるボルトである。したがって、金属プレート４０の一端側は、隣り合う二つのハウジング（第一ハウジング１０と第二ハウジング２０）のうち、一方のハウジング（第一ハウジング１０）に固定される。
　接触部４６は、金属プレート４０の他端側に形成されており、取り付け部４２を支点とした板バネとして機能する形状に形成されている。
　具体的には、図１２中に示すように、接触部４６は、隣り合う二つのハウジングを接続したときに、他方のハウジングが備える内周面２０ａから押された状態で弾性変形する形状に形成されている。
　したがって、金属プレート４０の他端側は、隣り合う二つのハウジングを接続したときに、他方のハウジングが備える内周面２０ａから押された状態で弾性変形した状態で、他方のハウジングに接触する。
　また、接触部４６のうち、金属プレート４０の他端を形成する案内部４８は、第二ハウジング２０が備える内周面２０ａよりも、第二ハウジング２０の中心軸側へ傾斜している。
　また、図１２中に示すように、金属プレート４０の全体は、隣り合う二つのハウジングを接続したときに、二つのハウジングの外側に露出していない。
（動作・作用）
　図７から図１２を参照して、第二実施形態の電動圧縮機１で行う動作の一例と、作用を説明する。
　電動圧縮機１の使用時には、インバータによって電動モータが駆動され、電動モータが有する駆動軸を介して、圧縮機構が駆動する。圧縮機構が駆動すると、冷媒（低圧冷媒）を、吸入ポートから吸入して圧縮し、圧縮した冷媒（高圧冷媒）を、吐出ポートから吐出する。
　ここで、第二実施形態の電動圧縮機１は、金属プレート４０の一端側が、一方のハウジングである第一ハウジング１０に固定されている。これに加え、隣り合う二つのハウジングを接続したときに、金属プレート４０の他端側が、他方のハウジングである第二ハウジング２０に接触している。
　このため、第一ハウジング１０と第二ハウジング２０は、金属プレート４０を介して電気的に接続されることとなり、第一ハウジング１０と第二ハウジング２０との間に発生する電位差を、減少させることが可能となる。
　すなわち、金属プレート４０が、第一ハウジング１０と第二ハウジング２０との間に発生する電位差を解消する電気的接続部を形成することとなる。
　また、第一ハウジング１０と第二ハウジング２０を、電気的に接続する金属プレート４０が、隣り合う二つのハウジングを接続したときに弾性変形する形状に形成されている。
　このため、第一ハウジング１０、第二ハウジング２０、ガスケット６０の公差にばらつきがある場合であっても、接触不良等の不具合を抑制することが可能となる。
　なお、上述した第二実施形態は、本発明の一例であり、本発明は、上述した第二実施形態に限定されることはなく、この実施形態以外の形態であっても、本発明に係る技術的思想を逸脱しない範囲であれば、設計等に応じて種々の変更が可能である。
（第二実施形態の効果）
　第二実施形態の電動圧縮機１であれば、以下に記載する効果を奏することが可能となる。
（１）金属プレート４０の他端側が、隣り合う二つのハウジングを接続したときに、他方のハウジングが備える内周面２０ａから押された状態で弾性変形した状態で、他方のハウジングに接触する。
　その結果、金属プレート４０の他端側を、継続的に他方のハウジングへ接触させることが可能となるため、第一ハウジング１０と第二ハウジング２０との間に発生する電位差を、安定して減少させることが可能な、電動圧縮機１を提供することが可能となる。
（２）金属プレート４０の全体が、隣り合う二つのハウジングを接続したときに、二つのハウジングの外側に露出していない。
　その結果、金属プレート４０が外気に触れることを抑制することが可能となるため、金属プレート４０の腐食を抑制することが可能となり、第一ハウジング１０と第二ハウジング２０との間に発生する電位差を、安定して減少させることが可能となる。
（３）接触部４６のうち、金属プレート４０の他端を形成する案内部４８が、第二ハウジング２０が備える内周面２０ａよりも、第二ハウジング２０の中心軸側へ傾斜している。
　その結果、第一ハウジング１０と第二ハウジング２０とを組み合わせる際に、案内部４８が、内周面２０ａよりも、第二ハウジング２０の中心軸側へ入り込むため、第一ハウジング１０と第二ハウジング２０とを組み合わせる作業が容易となる。 A first embodiment of the present invention will be described below with reference to the drawings. In the description of the drawings referred to in the following description, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that the drawings include portions having different dimensional relationships and ratios.
Furthermore, the first embodiment shown below exemplifies a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention is the material of the component parts, their shapes, The structure, arrangement, etc. are not specified below. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims. Further, the directions of “left and right” and “up and down” in the following description are merely definitions for convenience of description, and do not limit the technical idea of the present invention. Thus, for example, if the paper is rotated 90 degrees, “left and right” and “up and down” are read interchangeably, and if the paper is rotated 180 degrees, “left” becomes “right” and “right” becomes “left”. Of course it becomes.
(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
(Constitution)
As shown in FIG. 1, the electric compressor 1 includes a compression mechanism (not shown), an electric motor (not shown), an inverter (not shown), and a plurality of housings (first housing 10, A second housing 20, a third housing 30) and a metal plate 40 are provided.
The compression mechanism is a mechanism that compresses the refrigerant sucked from the outside and discharges the refrigerant to the outside, and is accommodated in the first housing 10. Therefore, the first housing 10 forms a compressor case that houses the compression mechanism. The first housing 10 is formed with a refrigerant suction port (not shown) and a refrigerant discharge port (not shown).
The electric motor is a drive source for the compression mechanism and is accommodated in the second housing 20. Therefore, the second housing 20 forms a motor case that houses the electric motor.
The inverter is configured to drive an electric motor and is accommodated in the third housing 30. Therefore, the third housing 30 forms an inverter case that houses the inverter.
The first housing 10, the second housing 20, and the third housing 30 are each formed using a metal material such as aluminum.
The first housing 10, the second housing 20, and the third housing 30 are fastened using a plurality of fixing bolts 50. Furthermore, the 1st housing 10, the 2nd housing 20, and the 3rd housing 30 are each provided with the internal peripheral surface which surrounds the target object (a compression mechanism, an electric motor, an inverter) to accommodate.
The fixing bolts 50 are arranged at intervals along the circumferential direction of the rotating shaft of the electric motor.
The adjacent first housing 10 and second housing 20 are connected via an insulating gasket 60. Moreover, although illustration is abbreviate | omitted, the adjacent 2nd housing 20 and the 3rd housing 30 are also connected through the insulating gasket. The gasket 60 has a through hole through which the fixing bolt 50 passes.
The third housing 30 includes a housing space for housing the inverter. The accommodation space is closed by the inverter cover 70.
The metal plate 40 is a metal plate member.
Moreover, the metal plate 40 is provided with the attachment part 42 and the bead part 44 as represented in FIGS. 2-5.
The attachment portion 42 is formed on one end side of the metal plate 40, and a bolt insertion hole 42a is formed.
The bolt insertion hole 42 a is a through hole that penetrates the metal plate 40, and the shaft portion of the mounting bolt 80 passes therethrough.
The attachment bolt 80 is a bolt that attaches the metal plate 40 to the first housing 10. Therefore, one end side of the metal plate 40 is fixed to one of the two adjacent housings (the first housing 10 and the second housing 20) (the first housing 10).
The bead portion 44 is formed on the other end side of the metal plate 40, and when two adjacent housings are connected, in the vicinity of one of the two adjacent fixing bolts 50a and 50b (fixing bolt 50a), It contacts the other housing (second housing 20).
Here, the vicinity of the fixing bolt 50a is, for example, a position closer to the fixing bolt 50a than an intermediate position between the fixing bolt 50a and the fixing bolt 50b.
In the first embodiment, as an example, the position at which the bead portion 44 contacts the second housing 20, that is, the position in the vicinity of the fixing bolt 50 a, and the distance between the bead portion 44 and the shaft portion of the fixing bolt 50 a is 5 [ mm].
The position in the vicinity of the fixing bolt 50a is not limited to the above position. That is, the distance between the bead portion 44 and the shaft portion of the fixing bolt 50a is set, for example, to a position within 1/4 of the distance from the fixing bolt 50a to the intermediate position between the fixing bolt 50a and the fixing bolt 50b. May be. In addition, for example, the distance between the bead portion 44 and the shaft portion of the fixing bolt 50a is set to a position within 1/2 of the distance from the fixing bolt 50a to the intermediate position between the fixing bolt 50a and the fixing bolt 50b. May be.
Moreover, the bead part 44 is provided with the plane part 44a, the inclined surface part 44b, and the protrusion surface part 44c.
The flat surface portion 44 a is continuous with the attachment portion 42.
The inclined surface portion 44b is continuous with the flat surface portion 44a, and is inclined with respect to the flat surface portion 44a toward the second housing 20 as the distance from the flat surface portion 44a increases.
The protruding surface portion 44c is continuous with the inclined surface portion 44b and protrudes toward the second housing 20 from the flat surface portion 44a.
Further, as shown in FIG. 6, the bead portion 44 comes into contact with the second housing 20 while being sandwiched between the gasket 60 and the second housing 20 when two adjacent housings are connected.
Therefore, the other end side of the metal plate 40 contacts the other housing of the two adjacent housings when the two adjacent housings are connected.
Further, the bead portion 44 sandwiched between the gasket 60 and the second housing 20 has a restoring force in a direction in which the inclined surface portion 44b and the protruding surface portion 44c are elastically deformed to separate two adjacent housings. It becomes.
Therefore, the metal plate 40 is formed in a shape that is elastically deformed when two adjacent housings are connected.
(Operation / Action)
With reference to FIGS. 1-6, an example of the operation | movement performed with the electric compressor 1 of 1st embodiment and an effect | action are demonstrated.
When the electric compressor 1 is used, the electric motor is driven by the inverter, and the compression mechanism is driven via the drive shaft of the electric motor. When the compression mechanism is driven, the refrigerant (low pressure refrigerant) is sucked and compressed from the suction port, and the compressed refrigerant (high pressure refrigerant) is discharged from the discharge port.
Here, as for the electric compressor 1 of 1st embodiment, the one end side of the metal plate 40 is being fixed to the 1st housing 10 which is one housing. In addition, when two adjacent housings are connected, the other end side of the metal plate 40 is in contact with the second housing 20 which is the other housing.
For this reason, the first housing 10 and the second housing 20 are electrically connected via the metal plate 40, and the potential difference generated between the first housing 10 and the second housing 20 is reduced. Is possible.
That is, the metal plate 40 forms an electrical connection portion that eliminates a potential difference generated between the first housing 10 and the second housing 20.
Further, the metal plate 40 that electrically connects the first housing 10 and the second housing 20 is formed in a shape that is elastically deformed when two adjacent housings are connected.
For this reason, even if the tolerances of the first housing 10, the second housing 20, and the gasket 60 are varied, it is possible to suppress problems such as poor contact.
The above-described first embodiment is an example of the present invention, and the present invention is not limited to the above-described first embodiment, and the present invention may be applied to other forms than this embodiment. Various modifications can be made according to the design or the like as long as they do not depart from the technical idea.
(Effects of the first embodiment)
If it is the electric compressor 1 of 1st embodiment, it will become possible to show the effect described below.
(1) One end side of the metal plate 40 is fixed to one of the two adjacent housings, and the other end side of the metal plate 40 contacts the other of the two adjacent housings when the two adjacent housings are connected. . In addition, two adjacent housings are metallicly connected via a metal plate 40, and the metal plate 40 is formed in a shape that is elastically deformed when the two adjacent housings are connected.
For this reason, the first housing 10 and the second housing 20 are electrically connected via the metal plate 40. In addition, since the metal plate 40 is formed in a shape that is elastically deformed when two adjacent housings are connected, even if there is a variation in tolerance between the two adjacent housings or the gasket 60. It is possible to suppress problems such as poor contact.
As a result, it is possible to provide the electric compressor 1 that can stably reduce a potential difference generated between two adjacent housings.
In addition, since the potential difference generated between two adjacent housings can be stably reduced, it is possible to suppress electric leakage and the like, and the safety of the electric compressor 1 can be improved. It becomes.
In addition, since the potential difference generated between two adjacent housings can be stably reduced, a prototype of a prototype created to confirm the resistance value existing between two adjacent housings. Manufacturing costs can be reduced.
(2) The metal plate 40 includes a bead portion 44 that is formed on the other end side of the metal plate 40 and protrudes toward the other housing (second housing 20). In addition, when the two adjacent housings are connected, the bead portion 44 contacts the second housing 20 while being sandwiched between the gasket 60 and the other housing (second housing 20).
For this reason, the bead portion 44 allows the metal plate 40 to have a height along the thickness direction of the metal plate 40 in a portion sandwiched between the gasket 60 and the second housing 20. Accordingly, when the bead portion 44 is disposed between the second housing 20 and the gasket 60 and the first housing 10 and the second housing 20 are fastened using the fixing bolt 50, the inclined surface portion 44b and the protruding surface portion 44c are elastic. Deform. And the bead part 44 of the state pinched | interposed between the gasket 60 and the 2nd housing 20 has a restoring force to the direction which separates two adjacent housings.
As a result, the contact state between the bead portion 44, the gasket 60, and the second housing 20 can be stably secured. As a result, it is possible to suppress the contact pressure between the first housing 10 and the second housing 20 from becoming excessive, and the surface pressure of the gasket 60 from being lowered to lower the sealing performance.
(3) One housing and the other housing are fastened by using a plurality of fixing bolts 50 arranged at intervals. In addition, when the two adjacent housings are connected, the other end of the metal plate 40 contacts the other housing in the vicinity of one of the two adjacent fixing bolts 50.
As a result, the other end side of the metal plate 40 is configured not to be continuous in the circumferential direction of the housing included in the electric compressor 1, so that the pressing force of the metal plate 40 on the gasket 60 (tightening pressure of the gasket 60) is reduced. It becomes possible to suppress.
(Modification of the first embodiment)
(1) In 1st embodiment, although the one end side of the metal plate 40 was fixed to the 1st housing 10, and the other end side of the metal plate 40 contacted the 2nd housing 20, it is not limited to this. That is, one end side of the metal plate 40 may be fixed to the second housing 20 and the other end side of the metal plate 40 may be in contact with the third housing 30.
In this case, the potential difference generated between the second housing 20 and the third housing 30 can be stably reduced by electrically connecting the second housing 20 and the third housing 30 via the metal plate 40. It is possible to suppress the mixing and generation of noise. Thus, it is possible to suppress the inflow of noise from the outside to the inverter and the outflow of noise generated in the inverter to the outside.
(2) In 1st embodiment, although the one end side of the metal plate 40 was fixed to the 1st housing 10, and the other end side of the metal plate 40 contacted the 2nd housing 20, it is not limited to this. That is, one end side of the metal plate 40 may be fixed to the second housing 20 and the other end side of the metal plate 40 may be in contact with the first housing 10.
(Second embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
(Constitution)
As shown in FIG. 7, the electric compressor 1 includes a compression mechanism (not shown), an electric motor (not shown), an inverter (not shown), and a plurality of housings (first housing 10, A second housing 20, a third housing 30) and a metal plate 40 are provided.
The configurations of the compression mechanism, the electric motor, the inverter, the first housing 10, the second housing 20, and the third housing 30 are the same as those in the first embodiment described above.
The metal plate 40 is a metal plate-like member, and includes a mounting portion 42 and a contact portion 46 as shown in FIGS. 8 to 11.
The attachment portion 42 is formed on one end side of the metal plate 40, and a bolt insertion hole 42a is formed.
The bolt insertion hole 42 a is a through hole that penetrates the metal plate 40, and the attachment bolt 80 penetrates therethrough.
The attachment bolt 80 is a bolt that attaches the metal plate 40 to the first housing 10 as in the first embodiment. Therefore, one end side of the metal plate 40 is fixed to one of the two adjacent housings (the first housing 10 and the second housing 20) (the first housing 10).
The contact portion 46 is formed on the other end side of the metal plate 40 and has a shape that functions as a leaf spring with the attachment portion 42 as a fulcrum.
Specifically, as shown in FIG. 12, when the two adjacent housings are connected, the contact portion 46 is formed in a shape that is elastically deformed while being pressed from the inner peripheral surface 20a of the other housing. Has been.
Therefore, when the two adjacent housings are connected, the other end side of the metal plate 40 comes into contact with the other housing while being elastically deformed while being pushed from the inner peripheral surface 20a of the other housing.
Moreover, the guide part 48 which forms the other end of the metal plate 40 among the contact parts 46 is inclined toward the central axis side of the second housing 20 with respect to the inner peripheral surface 20 a included in the second housing 20.
Further, as shown in FIG. 12, the entire metal plate 40 is not exposed to the outside of the two housings when the two adjacent housings are connected.
(Operation / Action)
With reference to FIGS. 7-12, an example of the operation | movement performed with the electric compressor 1 of 2nd embodiment and an effect | action are demonstrated.
When the electric compressor 1 is used, the electric motor is driven by the inverter, and the compression mechanism is driven via the drive shaft of the electric motor. When the compression mechanism is driven, the refrigerant (low pressure refrigerant) is sucked and compressed from the suction port, and the compressed refrigerant (high pressure refrigerant) is discharged from the discharge port.
Here, in the electric compressor 1 of the second embodiment, one end side of the metal plate 40 is fixed to the first housing 10 which is one housing. In addition, when two adjacent housings are connected, the other end side of the metal plate 40 is in contact with the second housing 20 which is the other housing.
For this reason, the first housing 10 and the second housing 20 are electrically connected via the metal plate 40, and the potential difference generated between the first housing 10 and the second housing 20 is reduced. Is possible.
That is, the metal plate 40 forms an electrical connection portion that eliminates a potential difference generated between the first housing 10 and the second housing 20.
Further, the metal plate 40 that electrically connects the first housing 10 and the second housing 20 is formed in a shape that is elastically deformed when two adjacent housings are connected.
For this reason, even if the tolerances of the first housing 10, the second housing 20, and the gasket 60 are varied, it is possible to suppress problems such as poor contact.
The above-described second embodiment is an example of the present invention, and the present invention is not limited to the above-described second embodiment, and the present invention may be applied to other forms than this embodiment. Various modifications can be made according to the design or the like as long as they do not depart from the technical idea.
(Effect of the second embodiment)
If it is the electric compressor 1 of 2nd embodiment, it will become possible to show the effect described below.
(1) When the other two housings of the metal plate 40 are connected to each other, the other metal plate 40 comes into contact with the other housing while being elastically deformed while being pushed from the inner peripheral surface 20a of the other housing.
As a result, the other end side of the metal plate 40 can be continuously brought into contact with the other housing, so that the potential difference generated between the first housing 10 and the second housing 20 can be stably reduced. It becomes possible to provide the electric compressor 1 which can be made.
(2) The entire metal plate 40 is not exposed to the outside of the two housings when the two adjacent housings are connected.
As a result, the metal plate 40 can be prevented from touching the outside air, so that the corrosion of the metal plate 40 can be suppressed, and the potential difference generated between the first housing 10 and the second housing 20. Can be stably reduced.
(3) Of the contact portion 46, the guide portion 48 that forms the other end of the metal plate 40 is inclined toward the central axis side of the second housing 20 with respect to the inner peripheral surface 20 a included in the second housing 20.
As a result, when the first housing 10 and the second housing 20 are combined, the guide portion 48 enters the center axis side of the second housing 20 rather than the inner peripheral surface 20a. The work of combining 20 becomes easy.
　１…電動圧縮機、１０…第一ハウジング、２０…第二ハウジング、２０ａ…第二ハウジングの内周面、３０…第三ハウジング、４０…金属プレート、４２…取り付け部、４２ａ…ボルト挿通孔、４４…ビード部、４４ａ…平面部、４４ｂ…傾斜面部、４４ｃ…突出面部、４６…接触部、４８…案内部、５０…固定ボルト、６０…ガスケット、７０…インバータカバー、８０…取り付けボルト DESCRIPTION OF SYMBOLS 1 ... Electric compressor, 10 ... 1st housing, 20 ... 2nd housing, 20a ... Inner peripheral surface of 2nd housing, 30 ... 3rd housing, 40 ... Metal plate, 42 ... Mounting part, 42a ... Bolt insertion hole, 44 ... Bead part, 44a ... Plane part, 44b ... Inclined surface part, 44c ... Projection surface part, 46 ... Contact part, 48 ... Guide part, 50 ... Fixing bolt, 60 ... Gasket, 70 ... Inverter cover, 80 ... Mounting bolt

Claims (5)

  1. 　冷媒を圧縮する圧縮機構と、前記圧縮機構の駆動源となる電動モータと、前記電動モータを駆動するためのインバータと、前記圧縮機構、前記電動モータ及び前記インバータを収容する複数の金属製のハウジングと、を備え、隣り合う二つの前記ハウジングが絶縁性のガスケットを介して接続された電動圧縮機であって、
    　前記隣り合う二つのハウジングの一方に一端側が固定され、前記隣り合う二つのハウジングを接続したときに隣り合う二つのハウジングの他方に他端側が接触する金属プレートを備え、
    　前記隣り合う二つのハウジングは、前記金属プレートを介して金属的に接続され、
    　前記金属プレートは、前記隣り合う二つのハウジングを接続したときに弾性変形する形状に形成されていることを特徴とする電動圧縮機。     A compression mechanism that compresses the refrigerant; an electric motor that is a drive source of the compression mechanism; an inverter that drives the electric motor; and a plurality of metal housings that house the compression mechanism, the electric motor, and the inverter. And an electric compressor in which two adjacent housings are connected via an insulating gasket,
    One end side is fixed to one of the two adjacent housings, and when the two adjacent housings are connected, the other end of the two adjacent housings comes into contact with the metal plate,
    The two adjacent housings are metallically connected via the metal plate,
    The electric compressor according to claim 1, wherein the metal plate is formed in a shape that is elastically deformed when the two adjacent housings are connected.
  2. 　前記金属プレートは、前記他端側に形成され、且つ前記他方のハウジングへ向けて突出するビード部を備え、
    　前記ビード部は、前記隣り合う二つのハウジングを接続したときに、前記ガスケットと前記他方のハウジングとに挟まれた状態で他方のハウジングと接触することを特徴とする請求項１に記載した電動圧縮機。     The metal plate includes a bead portion formed on the other end side and protruding toward the other housing,
    2. The electric compression according to claim 1, wherein the bead portion is in contact with the other housing in a state of being sandwiched between the gasket and the other housing when the two adjacent housings are connected. Machine.
  3. 　前記一方のハウジングと前記他方のハウジングは、間隔を空けて配置された複数本の固定ボルトを用いて締結され、
    　前記金属プレートの他端側は、前記隣り合う二つのハウジングを接続したときに、隣り合う二つの前記固定ボルトのうち一方の近傍で前記他方のハウジングに接触することを特徴とする請求項２に記載した電動圧縮機。     The one housing and the other housing are fastened using a plurality of fixing bolts arranged at intervals,
    The other end side of the metal plate contacts the other housing in the vicinity of one of the two adjacent fixing bolts when the two adjacent housings are connected. The described electric compressor.
  4. 　前記ハウジングは、収容する対象物を包囲する内周面を備え、
    　前記金属プレートの他端側は、前記隣り合う二つのハウジングを接続したときに、前記他方のハウジングが備える内周面から押された状態で弾性変形することを特徴とする請求項１に記載した電動圧縮機。     The housing includes an inner peripheral surface surrounding an object to be accommodated,
    The other end side of the metal plate is elastically deformed while being pressed from an inner peripheral surface of the other housing when the two adjacent housings are connected. Electric compressor.
  5. 　前記金属プレートの全体は、前記隣り合う二つのハウジングを接続したときに、前記二つのハウジングの外側に露出していないことを特徴とする請求項１から請求項４のうちいずれか１項に記載した電動圧縮機。 The entire metal plate is not exposed to the outside of the two housings when the two adjacent housings are connected to each other. Electric compressor.
PCT/JP2019/006177 2018-03-14 2019-02-12 Electric compressor WO2019176475A1 (en)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2005030248A (en) * 2003-07-09 2005-02-03 Zexel Valeo Climate Control Corp Sealing device for compressor
JP2015017577A (en) * 2013-07-12 2015-01-29 サンデン株式会社 Motor compressor
WO2017145616A1 (en) * 2016-02-24 2017-08-31 株式会社デンソー Vehicular electric compressor, and method for manufacturing vehicular electric compressor
WO2018221280A1 (en) * 2017-06-01 2018-12-06 サンデン・オートモーティブコンポーネント株式会社 Inverter-integrated electric compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005030248A (en) * 2003-07-09 2005-02-03 Zexel Valeo Climate Control Corp Sealing device for compressor
JP2015017577A (en) * 2013-07-12 2015-01-29 サンデン株式会社 Motor compressor
WO2017145616A1 (en) * 2016-02-24 2017-08-31 株式会社デンソー Vehicular electric compressor, and method for manufacturing vehicular electric compressor
WO2018221280A1 (en) * 2017-06-01 2018-12-06 サンデン・オートモーティブコンポーネント株式会社 Inverter-integrated electric compressor

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