WO2016006361A1 - Electronic-component-accommodating structure - Google Patents

Electronic-component-accommodating structure Download PDF

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Publication number
WO2016006361A1
WO2016006361A1 PCT/JP2015/065624 JP2015065624W WO2016006361A1 WO 2016006361 A1 WO2016006361 A1 WO 2016006361A1 JP 2015065624 W JP2015065624 W JP 2015065624W WO 2016006361 A1 WO2016006361 A1 WO 2016006361A1
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WO
WIPO (PCT)
Prior art keywords
housing
rib
vibration
cross
upper housing
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PCT/JP2015/065624
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French (fr)
Japanese (ja)
Inventor
晶博 片上
Original Assignee
日産自動車株式会社
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Publication date
Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to JP2016532495A priority Critical patent/JP6332450B2/en
Publication of WO2016006361A1 publication Critical patent/WO2016006361A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Definitions

  • the present invention relates to an electronic component housing structure.
  • a power conversion device in which a plurality of electronic components constituting a power conversion circuit and a cooler for cooling the electronic components are accommodated in a case. And in the said power converter device, an electronic component and a cooler are fixed to a flame
  • the internal unit is fixed to the case and sealed in the case.
  • the frame has a unit fixing part and a capacitor fixing part for fixing the capacitor.
  • the capacitor fixing part is disposed inside the unit fixing part. This suppresses vibrations transmitted from the capacitor to the case while enhancing the synthesis of the case (Patent Document 1).
  • the first factor is that the components (capacitors in Patent Document 1) constituting the power conversion device are sources of vibration.
  • a 2nd factor is that a power converter device vibrates because the vibration which generate
  • the problem to be solved by the present invention is to provide an electronic component housing structure capable of suppressing not only the vibration caused by the first factor but also the vibration caused by the second factor.
  • an electronic component is accommodated by a housing having a first member and a second member, and the first member and the second member are fastened by a fastening member.
  • the first member has a fastening portion fastened by a fastening member on the surface of the first member.
  • the said subject is solved by comprising a rib so that the direction which goes to a fastening site
  • the eigenvalue of vibration of the housing structure can be shifted from the eigenvalue of vibration of other components while increasing the rigidity of the surface of the first member, vibration of the housing structure can be suppressed. .
  • FIG. 2A is a plan view of the housing
  • FIG. 2B is a side view of the housing
  • 3A is a plan view of the upper housing
  • FIG. 3B is a cross-sectional view taken along line III-III in FIG. 3A
  • 4A is a plan view of the housing
  • FIG. 4B is a side view of the housing.
  • FIG. 5A is a plan view of the housing
  • FIG. 5B is a side view of the housing.
  • 6A is a plan view of the upper housing
  • FIG. 6B is a cross-sectional view taken along line VI-VI in FIG. 6A.
  • 7A is a plan view of the upper housing
  • FIG. 7B is a cross-sectional view taken along the line VII-VII in FIG. 7A.
  • 8A is a plan view of the upper housing
  • FIG. 8B is a cross-sectional view taken along the line VIIIa-VIIIa in FIG. 8A
  • FIG. 8C is a cross-sectional view of FIG. It is sectional drawing which follows the VIIIb-VIIIb line.
  • FIG. 1 is a diagram showing a power unit in which a power conversion device and a power device according to an embodiment of the present invention are integrated.
  • the power unit is used as a drive source for an electric vehicle or a hybrid vehicle, and is provided in the vehicle.
  • the power unit includes a power device 10, a power converter 20, a transmission 30, a vibration isolation support device 40, a spring 50, a bolt 60, and a rib 71.
  • the power unit 10 is a motor driven by electric power supplied from a battery (not shown).
  • Power device 10 is a drive source of a vehicle that is connected to a drive shaft of the vehicle and is driven by AC power from power conversion device 20.
  • the power unit 10 becomes a generation source (vibration source) that generates vibration.
  • the excitation force due to vibration is represented by a value obtained by multiplying the number of rotations of the motor by an integer.
  • the rotation speed of the motor is represented by the relationship between the number of poles of the rotor and the stator and the drive frequency.
  • the power conversion device 20 includes an electronic component 21, a substrate 22, and a housing 23.
  • the power conversion device 20 converts the power supplied from the battery, and outputs the converted power to the power unit 10.
  • the power conversion device 20 is a structure that houses the electronic component 21.
  • the electronic component 21 is a circuit element that constitutes an inverter and a rectifier. Taking an inverter as an example, the electronic component 21 corresponds to a switching element such as an IGBT and a diode.
  • the substrate 22 is a plate-like circuit board.
  • the substrate 22 is supported by the housing 23.
  • the housing 23 accommodates the electronic component 21 and the substrate 22.
  • casing 23 is comprised with metals, such as aluminum.
  • casing 23 may be comprised with members, such as not only a metal but resin.
  • the casing 23 is fastened to the power unit 10 by bolts. That is, the power converter 10 and the power converter 20 are integrated by fixing the power converter 20 to the power apparatus 10. Therefore, when the power device 10 vibrates, the vibration propagates to the power conversion device 20. Further, when the power conversion device 20 vibrates by driving the inverter, the vibration propagates to the power device 10.
  • the housing 23 has an upper housing 23a and a lower housing 23b.
  • casing 23 is demonstrated using FIG.
  • FIG. 2A shows a plan view of the housing 23, and
  • FIG. 2B shows a side view of the housing 23.
  • the power unit according to the present embodiment is configured to provide the ribs 71 on the housing 23, but the ribs are not shown in FIG. The specific configuration of the rib 71 will be described later.
  • the upper casing 23a is a plate-like metal member, and is formed to be a lid of the lower casing 23b.
  • the lower housing 23 b is a main body portion of the housing 23.
  • the lower housing 23b opens a surface covered by the upper housing 23a, and the surface other than the opened surface is a wall surface. With the opening of the lower housing 23b closed by the upper housing 23a, the electronic component 21 is accommodated in a space formed by the upper housing 23a and the lower housing 23b.
  • the mass of the upper housing 23a is smaller than the mass of the lower housing 23b, and the rigidity of the upper housing 23a is lower than the rigidity of the lower housing 23b. Therefore, the upper housing 23a has a structure that is easier to vibrate than the lower housing 23b.
  • the upper casing 23 a and the lower casing 23 b are fastened by bolts 60.
  • the surface of the upper housing 23 is rectangular.
  • the four corner portions are portions to be fastened by the bolts 60 (hereinafter also referred to as fastening portions).
  • a portion located between the four corners is also a fastening portion along the long side. That is, the fastening portion is provided on the outer peripheral portion of the rectangular surface.
  • casing 23b are fastened with the volt
  • the transmission 30 converts the rotational speed and torque between the power unit 10 and the drive shaft.
  • the transmission 30 is fastened to the power unit 10 by bolts or the like.
  • the anti-vibration support device 40 supports the power device 10, the power conversion device 20, and the transmission 30 on the vehicle body.
  • the anti-vibration support device 40 is a device for preventing the vibrations of the power device 10, the power conversion device 20, and the transmission 30 from propagating to the vehicle body.
  • the anti-vibration support device 40 is made of resin.
  • the anti-vibration support device 40 is fixed to the transmission 30.
  • the anti-vibration support device 40 is fixed to the vehicle body via a spring 50.
  • the vibration of the housing 23 will be described.
  • the housing 23 is shaped to cover the electronic component 21, the housing 23 is likely to vibrate compared to other components of the power conversion device 20.
  • the power device 10 becomes a vibration source and vibration is generated, the vibration propagates to the power conversion device 20.
  • the power unit 10 is fastened to the housing 23, the housing 23 vibrates.
  • the vibration frequency of the casing 23 is close to the natural value (natural vibration frequency) of the transmission 3, the noise of the power unit increases due to resonance.
  • FIG. 3 is a diagram for explaining the vibration of the upper casing 23a.
  • 3A is a plan view of the upper housing 23a
  • FIG. 3B is a cross-sectional view taken along the line III-III in FIG. 3A.
  • the dotted line in FIG. 3B represents the vibration mode of the upper housing 23a.
  • the outer peripheral part of the surface of the upper housing 23a is fastened with bolts 60. Therefore, the rigidity of the outer peripheral portion is high. On the other hand, the rigidity of the central portion of the surface is low. Therefore, when vibration is transmitted to the housing 23, the upper housing 23a vibrates as indicated by a dotted line in FIG. The amount of deformation of the upper casing 23a due to vibration is greatest at the central portion A of the surface of the upper casing 23a. That is, the central portion A becomes a vibration antinode, and the outer peripheral portion becomes a vibration node. Also, the dotted line in FIG. 3B shows the vibration waveform in the primary mode, but the casing 23 generates not only the vibration in the primary mode but also the vibration in the secondary mode.
  • the vibration of the primary mode can be suppressed by increasing the mass of the upper housing 23a, for example.
  • the vibration of the secondary mode vibration cannot be sufficiently suppressed only by increasing the mass of the upper casing 23a.
  • the vibration of the secondary mode vibration can be suppressed by shifting the eigenvalue of the upper housing 23a so that the eigenvalue of the power conversion device 20 and the eigenvalue of the peripheral component do not approach each other. Therefore, in the present embodiment, the rib 71 is provided on the upper housing 23a so that not only the vibration in the primary mode but also the vibration in the secondary mode can be suppressed.
  • FIG. 4 is a diagram for explaining the housing 23 and the rib 71.
  • 4A is a plan view of the housing 23 and the rib 71
  • FIG. 4B is a side view of the housing 23 and the rib 71.
  • the rib 71 is a member for suppressing the vibration of the upper casing 23a, and is provided on the surface of the upper casing 23a.
  • the rib 71 is made of the same metal as that of the housing 23.
  • the rib 71 is formed in the shape of three straight rails. Further, the midpoints of the three ribs 71a, 71b, 71c are at the same position, and the midpoint is located at the central portion A of the upper housing 23a.
  • the rib 71 a is formed along the direction from the central portion A toward the bolt 60.
  • the bolts 60 are bolts positioned between the bolts 60 positioned at the four corners, and are opposed in the direction along the short side of the upper housing 23a.
  • the short side is the shorter side of the four sides forming the rectangular surface of the upper housing 23a.
  • the rib 71b is formed along the direction from the central portion A toward the bolt 60.
  • the bolts 60 are located at the four corners of the surface of the upper housing 23a and are located on the diagonal lines of the surface of the upper housing 23a.
  • the rib 71c is formed along the direction from the central portion A toward the bolt 60.
  • the ribs 71a, 71b, 71c are formed along the direction from the central portion A toward each bolt 60.
  • the ribs 71a, 71b, 71c are formed on a line connecting the pair of bolts 60, and the midpoint of the ribs 71a, 71b, 71c is located on the antinode of the surface of the upper housing 23a.
  • the pair of bolts 60 are opposed to each other with the central portion A as a boundary on the surface of the upper housing 23a.
  • the upper casing 23a is provided with the ribs 71.
  • the rigidity of the upper housing 23 a is increased by the rib 71.
  • the rib 71 is formed along the direction from the position on the surface of the upper housing 23a toward the bolt 60, the eigenvalue of the vibration of the upper housing 23a can be shifted.
  • the following method can be cited.
  • a method of arranging a vibration isolating member between the power device 10 and the power conversion device 20 For example, there is a method of arranging a vibration isolating member between the power device 10 and the power conversion device 20.
  • the cost is increased by providing the vibration isolation member.
  • the cost increases as the soundproofing member is provided.
  • the vibration surface of the housing 23 corresponds to a surface on which vibration is easily generated among the surfaces constituting the housing 23.
  • the mass in order to suppress vibrations simply by increasing the mass, the mass must be significantly increased.
  • the rigidity of the vibration surface of the housing 23 when the devices constituting the power unit are densely combined as in the present embodiment, the eigenvalue of the housing 23 is the value of the surrounding configuration so that the devices do not resonate. The value must be far from the eigenvalue. Therefore, as a result, the mass of the housing 23 increases, and the size of the power unit increases.
  • the rib 71 is provided in the housing 23, thereby increasing the mass of the housing 23 and suppressing the vibration in the primary mode. Further, since the rib 71 is formed along the direction from the antinode of the surface of the upper housing 23a toward the bolt 60, the vibration of the secondary mode is suppressed while minimizing an increase in the mass of the housing 23. is doing. Although the mass of the housing 23 is increased by providing the rib 71 on the housing 23, if the deviation of the eigenvalue of the housing 23 is large with respect to the increase in the mass due to the rib 71, the eigenvalue of the housing 23 is the power It can be separated from the eigenvalue of the device 10 or the like.
  • the ribs 71 are not only provided on the housing 23 but also provided on the surface of the upper housing 23a from a low rigidity portion to a high portion. Therefore, resonance with the power unit 10 or the like can be avoided while increasing the rigidity of the surface of the upper housing 23a. As a result, this embodiment can suppress vibration of the power conversion device 20 and suppress noise of the power unit.
  • vibration of the power conversion device 20 can be suppressed and noise of the power conversion device 20 can be suppressed with a simple configuration, space saving, and low cost. As a result, the quietness in the passenger compartment can be improved.
  • the fastening portion by the bolt 60 becomes a node of the vibration wave, and the central portion of the surface corresponds to the antinode of the vibration wave. Therefore, the rib 71 is formed from the antinode portion of the vibration wave toward the node portion. As a result, the rigidity of the portion of the surface of the upper housing 23a where the amount of deformation due to vibration is large is increased, and resonance with the power unit 10 or the like can be avoided. As a result, vibration of the power conversion device 20 can be suppressed and noise of the power unit can be suppressed.
  • the rib 71 is provided outside the surface of the upper housing 23a, but may be provided inside.
  • the inner surface is a surface facing the electronic component 21.
  • the midpoint of the rib 71 is adjusted to the position of the antinode of the vibration wave.
  • the rib 71 may be configured so that the midpoint of the rib 71 is located at a position other than the central portion of the surface.
  • the housing structure for suppressing vibration is not limited to the power conversion device 20 and may be other devices.
  • the fastening member that fastens the upper housing 23a and the lower housing 23b is not limited to the bolt 60, and may be another member.
  • the bolt 60 corresponds to the “fastening member” of the present invention
  • the upper housing 23a corresponds to the “first member” of the present invention
  • the lower housing 23b corresponds to the “second member” of the present invention
  • the ribs 71a to 71c correspond to the “first rib” of the present invention.
  • FIG. 5A shows a plan view of the housing 23, and FIG. 5B shows a side view of the housing 23.
  • the ends of both ends of the rib 71a are in contact with the bolts 60.
  • the ends of both ends of the ribs 71 b and 71 c are in contact with the bolt 60. Since the outer peripheral portion of the upper housing 23a is fastened by the bolt 60, the rigidity is high. That is, the rib 71 is provided so that the end portions of the ribs 71a to 71c are in contact with the portion having high rigidity. Thereby, since the rigidity of the vibration surface can be increased effectively, resonance with other components can be avoided while suppressing an increase in mass. As a result, the noise of the power unit can be suppressed.
  • FIG. 6A is a plan view of the upper housing 23a
  • FIG. 6B is a cross-sectional view taken along the line VI-VI in FIG. 6A. Note that a surface along the normal direction of the paper surface of FIG. 6A is a cross section shown in FIG.
  • the upper housing 23a has a thick portion 230 centered on the central portion A.
  • the thickness of the thick part 230 is thicker than the thickness of other parts other than the thick part 230.
  • the part other than the thick part 230 includes the outer peripheral part of the surface of the upper housing 23a.
  • the thick part 230 is configured to be integrated with the upper casing 23a. That is, the upper housing 23a is configured such that the antinode portion of the vibration is thicker than the other portions other than the antinode in the cross section along the line VI-VI.
  • the thickness of the upper housing 23a is the thickest at the vibration antinode, and gradually decreases toward the outer periphery.
  • the rigidity of the surface serving as the vibration surface of the upper housing 23a can be effectively increased, and the amount of deformation due to vibration can be suppressed. Also, resonance with other parts can be avoided. As a result, the noise of the power unit can be suppressed.
  • FIG. 7A shows a plan view of the upper housing 23a
  • FIG. 7B shows a cross-sectional view taken along the line VII-VII in FIG. 7A. Note that a surface along the normal direction of the paper surface of FIG. 7A is a cross section shown in FIG. 7B.
  • ribs 71a to 71c and ribs 72a to 72c are provided on the surface of the upper casing 23a.
  • Each of the ribs 72a to 72c is configured to have a circular shape having a different radius.
  • the rib 72a has the smallest diameter and the rib 72c has the largest diameter.
  • the center points of the circular ribs 72a to 72c are the same, and the center points of the ribs 71a to 71c are located at the center portion A of the surface of the upper housing 23a. That is, the ribs 71a to 71c are formed along a circle centered on the central portion A of the surface of the upper housing 23a.
  • the upper housing 23a is provided with ribs 72a to 72c at the antinodes of vibration in the cross section along the line VII-VII.
  • casing 23a increases.
  • the thick portion 230 is not provided in the housing 23 as in the third embodiment, the same effects as the thick portion 230 can be exhibited by the ribs 72a to 72c.
  • high quality control is calculated
  • the upper casing 23a can be easily manufactured by casting. Therefore, the casting quality of the upper housing 23a can be maintained without increasing quality control more than necessary.
  • the ribs 72a to 72 correspond to the “second rib” of the present invention.
  • FIG. 8A shows a plan view of the upper housing 23a
  • FIG. 8B shows a cross-sectional view taken along the line VIIIa-VIIIa of FIG. 8A
  • FIG. 8C shows FIG. 8A. Sectional drawing which follows the VIIIb-VIIIb line
  • the cross section along the line VIIIa-VIIIa and the cross section along the line VIIIb-VIIIb are surfaces whose normal direction is the direction from the central portion A of the upper housing 23a toward the bolts 60 located at the four corners.
  • the cross section taken along the line VIIIa-VIIIa is a surface closer to the central part A than the cross section taken along the line VIIIb-VIIIb between the central part A of the upper housing 23a and the bolts 60 located at the four corners. .
  • the ribs 71a to 71c have the thickest central portion A and gradually become thinner toward the bolt 60.
  • the ribs 71a to 71c are configured such that the closer to the belly portion of the upper housing 23a, the thicker the thickness.
  • the cross section of the rib 71c when the area of the cross section along the line VIIIa-VIIIa is Sa and the area Sb of the cross section along the line VIIIb-VIIIb, Sa> Sb is satisfied. That is, the rib 71c is formed so that the cross-sectional area when the rib 71c is cut along the section VIIIa-VIIIa line is larger than the cross-sectional area when the rib 71c is cut along the section VIIIb-VIIIb line.
  • the rib 71a and the rib 71b are also formed in the same manner as the rib 71c.
  • the ribs 72a to 72c are configured such that the cross-sectional areas of the ribs 72a to 72c increase as the area of the rib on the surface of the upper housing 23a becomes closer. Accordingly, in the present embodiment, the ribs 71a to 71c can exhibit the same effect as the thick portion 230 without providing the thick portion 230 in the housing 23 as in the third embodiment.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

This accommodating structure for accommodating electronic components is provided with: electronic components; a housing which is provided with a first member and a second member, and which accommodates the electronic components; fastening members for fastening the first member and the second member together; and a rib provided to the first member. The first member has, provided to the surface thereof, fastening regions which are fastened by the fastening members. The rib is provided with first ribs formed along directions extending from prescribed positions on the surface of the first member towards the fastening regions.

Description

電子部品の収容構造体Electronic component housing structure
　本発明は、電子部品の収容構造体に関するものである。 The present invention relates to an electronic component housing structure.
　本出願は、２０１４年７月１０日に出願された日本国特許出願の特願２０１４―１４２０８１に基づく優先権を主張するものであり、文献の参照による組み込みが認められる指定国については、上記の出願に記載された内容を参照により本出願に組み込み、本出願の記載の一部とする。 This application claims priority based on Japanese Patent Application No. 2014-142081 filed on Jul. 10, 2014. For the designated countries that are allowed to be incorporated by reference, The contents described in the application are incorporated into the present application by reference and made a part of the description of the present application.
　従来より、電力変換回路を構成する複数の電子部品と、電子部品を冷却する冷却器とを、ケース内に収容してなる電力変換装置が知られている。そして、当該電力変換装置において、電子部品と冷却器は、フレームに固定され、フレームと共に一体化されて一つの内部ユニットを構成している。内部ユニットは、ケースに固定されると共にケース内に密封されている。フレームは、ユニット固定部と、コンデンサを固定するコンデンサ固定部とを有する。コンデンサ固定部は、ユニット固定部よりも内側に配置されている。これによりケースの合成を高めつつ、コンデンサからケースに伝わる振動を抑制している（特許文献１）。 Conventionally, there is known a power conversion device in which a plurality of electronic components constituting a power conversion circuit and a cooler for cooling the electronic components are accommodated in a case. And in the said power converter device, an electronic component and a cooler are fixed to a flame | frame, and are integrated with the flame | frame and comprise one internal unit. The internal unit is fixed to the case and sealed in the case. The frame has a unit fixing part and a capacitor fixing part for fixing the capacitor. The capacitor fixing part is disposed inside the unit fixing part. This suppresses vibrations transmitted from the capacitor to the case while enhancing the synthesis of the case (Patent Document 1).
特開２０１１－１８２６３１号公報JP 2011-182631 A
　ところで、電力変換装置が振動する要因として、以下の２つが挙げられる。第１の要因は、電力変換装置を構成する部品（上記特許文献１のコンデンサ）が振動の発生源となっていることである。第２の要因は、電力変換装置以外の構成で発生する振動が電力変換装置に伝わることで、電力変換装置が振動することである。 By the way, there are the following two factors that cause the power converter to vibrate. The first factor is that the components (capacitors in Patent Document 1) constituting the power conversion device are sources of vibration. A 2nd factor is that a power converter device vibrates because the vibration which generate | occur | produces in structures other than a power converter device is transmitted to a power converter device.
　しかしながら、上記の特許文献１の技術においては、第１の要因により発生する振動に対して有効ではあるが、第２の要因により発生する振動に対しては振動抑制効果を十分に得ることができない、という問題があった。 However, in the technique of the above-mentioned Patent Document 1, although effective against the vibration generated by the first factor, the vibration suppressing effect cannot be sufficiently obtained for the vibration generated by the second factor. There was a problem.
　本発明が解決しようとする課題は、第１の要因により発生する振動だけではなく、第２の要因により発生する振動も抑制できる電子部品の収容構造体を提供することである。 The problem to be solved by the present invention is to provide an electronic component housing structure capable of suppressing not only the vibration caused by the first factor but also the vibration caused by the second factor.
　本発明は、第１部材及び第２部材を有する筐体により電子部品を収容し、第１部材と第２部材を締結部材で締結する。第１部材は、第１部材の表面上に、締結部材により締結されている締結部位を有する。そして、第１部材の表面上の所定の位置から締結部位に向かう方向に沿うようにリブを構成することによって上記課題を解決する。 In the present invention, an electronic component is accommodated by a housing having a first member and a second member, and the first member and the second member are fastened by a fastening member. The first member has a fastening portion fastened by a fastening member on the surface of the first member. And the said subject is solved by comprising a rib so that the direction which goes to a fastening site | part from the predetermined position on the surface of a 1st member may be followed.
　本発明によれば、第１部材の表面の剛性を高めつつ、収容構造体がもつ振動の固有値を、他の部品がもつ振動の固有値からずらすことができるため、収容構造体の振動を抑制できる。 According to the present invention, since the eigenvalue of vibration of the housing structure can be shifted from the eigenvalue of vibration of other components while increasing the rigidity of the surface of the first member, vibration of the housing structure can be suppressed. .
本発明の実施形態に係る動力ユニットを示す図であり、（ａ）は動力ユニットの平面図を、（ｂ）は動力ユニットの側面図を示す。It is a figure which shows the power unit which concerns on embodiment of this invention, (a) is a top view of a power unit, (b) shows the side view of a power unit. 図２（ａ）は筐体の平面図であり、図２（ｂ）は筐体の側面図である。FIG. 2A is a plan view of the housing, and FIG. 2B is a side view of the housing. 図３（ａ）は上部筐体の平面図であり、図３（ｂ）は図３（ａ）のIII－III線に沿う断面図である。3A is a plan view of the upper housing, and FIG. 3B is a cross-sectional view taken along line III-III in FIG. 3A. 図４（ａ）は筐体の平面図であり、図４（ｂ）は筐体の側面図である。4A is a plan view of the housing, and FIG. 4B is a side view of the housing. 図５（ａ）は筐体の平面図であり、図５（ｂ）は筐体の側面図である。FIG. 5A is a plan view of the housing, and FIG. 5B is a side view of the housing. 図６（ａ）は上部筐体の平面図であり、図６（ｂ）は図６（ａ）のVI－VI線に沿う断面図である。6A is a plan view of the upper housing, and FIG. 6B is a cross-sectional view taken along line VI-VI in FIG. 6A. 図７（ａ）は上部筐体の平面図であり、図７（ｂ）は図７（ａ）のVII－VII線に沿う断面図である。7A is a plan view of the upper housing, and FIG. 7B is a cross-sectional view taken along the line VII-VII in FIG. 7A. 図８（ａ）は上部筐体の平面図であり、図８（ｂ）は図８（ａ）のVIIIａ－VIIIａ線に沿う断面図であり、図８（ｃ）は図８（ａ）のVIIIｂ－VIIIｂ線に沿う断面図である。8A is a plan view of the upper housing, FIG. 8B is a cross-sectional view taken along the line VIIIa-VIIIa in FIG. 8A, and FIG. 8C is a cross-sectional view of FIG. It is sectional drawing which follows the VIIIb-VIIIb line.
　以下、本発明の実施形態を図面に基づいて説明する。
《第１実施形態》
　図１は、本発明の実施形態に係る電力変換装置及び動力装置を一体化した動力ユニットを示す図である。動力ユニットは、電気自動車又はハイブリッド車両の等の駆動源として用いられ、車両に設けられている。動力ユニットは、動力装置１０、電力変換装置２０、変速装置３０、防振支持装置４０、バネ５０、ボルト６０及びリブ７１を備えている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<< First Embodiment >>
FIG. 1 is a diagram showing a power unit in which a power conversion device and a power device according to an embodiment of the present invention are integrated. The power unit is used as a drive source for an electric vehicle or a hybrid vehicle, and is provided in the vehicle. The power unit includes a power device 10, a power converter 20, a transmission 30, a vibration isolation support device 40, a spring 50, a bolt 60, and a rib 71.
　動力装置１０は、バッテリ（図示しない）から供給される電力により駆動するモータである。動力装置１０は、車両の駆動軸に連結され、電力変換装置２０からの交流電力により駆動する車両の駆動源である。動力装置１０が駆動すると、動力装置１０は振動を発する発生源（起振源）となる。振動による加振力はモータの回転数を整数倍した値で表される。またモータの回転数は、ロータ及びステータの極数と駆動周波数との関係で表される。 The power unit 10 is a motor driven by electric power supplied from a battery (not shown). Power device 10 is a drive source of a vehicle that is connected to a drive shaft of the vehicle and is driven by AC power from power conversion device 20. When the power unit 10 is driven, the power unit 10 becomes a generation source (vibration source) that generates vibration. The excitation force due to vibration is represented by a value obtained by multiplying the number of rotations of the motor by an integer. The rotation speed of the motor is represented by the relationship between the number of poles of the rotor and the stator and the drive frequency.
　電力変換装置２０は、電子部品２１、基板２２、及び筐体２３を有している。電力変換装置２０はバッテリから供給される電力を変換し、変換された電力を動力装置１０に出力する。電力変換装置２０は電子部品２１を収容する構造体である。電子部品２１は、インバータ、整流器を構成する回路素子である。一例としてインバータを挙げると、電子部品２１は、ＩＧＢＴ等のスイッチング素子及びダイオードに相当する。 The power conversion device 20 includes an electronic component 21, a substrate 22, and a housing 23. The power conversion device 20 converts the power supplied from the battery, and outputs the converted power to the power unit 10. The power conversion device 20 is a structure that houses the electronic component 21. The electronic component 21 is a circuit element that constitutes an inverter and a rectifier. Taking an inverter as an example, the electronic component 21 corresponds to a switching element such as an IGBT and a diode.
　基板２２は、板状の回路基板である。基板２２は筐体２３に支持されている。筐体２３は、電子部品２１及び基板２２を収容する。筐体２３は、アルミ等の金属により構成されている。なお、筐体２３は金属に限らず樹脂等の部材で構成されてもよい。筐体２３はボルトにより動力装置１０に締結されている。すなわち、電力変換装置２０が動力装置１０に固定されることで、動力装置１０及び電力変換装置２０は一体化されている。そのため、動力装置１０が振動した場合には、振動は電力変換装置２０に伝搬する。また、インバータが駆動することで電力変換装置２０が振動した場合には、振動は動力装置１０に伝搬する。 The substrate 22 is a plate-like circuit board. The substrate 22 is supported by the housing 23. The housing 23 accommodates the electronic component 21 and the substrate 22. The housing | casing 23 is comprised with metals, such as aluminum. In addition, the housing | casing 23 may be comprised with members, such as not only a metal but resin. The casing 23 is fastened to the power unit 10 by bolts. That is, the power converter 10 and the power converter 20 are integrated by fixing the power converter 20 to the power apparatus 10. Therefore, when the power device 10 vibrates, the vibration propagates to the power conversion device 20. Further, when the power conversion device 20 vibrates by driving the inverter, the vibration propagates to the power device 10.
　筐体２３は、上部筐体２３ａと下部筐体２３ｂを有している。図２を用いて、筐体２３の構造を説明する。図２（ａ）は筐体２３の平面図を示し、図２（ｂ）は筐体２３の側面図を示す。なお、本実施形態に係る動力ユニットは、筐体２３にリブ７１を設けるように構成されているが、図２ではリブの図示を省略している。またリブ７１の具体的な構成は後述する。 The housing 23 has an upper housing 23a and a lower housing 23b. The structure of the housing | casing 23 is demonstrated using FIG. FIG. 2A shows a plan view of the housing 23, and FIG. 2B shows a side view of the housing 23. Note that the power unit according to the present embodiment is configured to provide the ribs 71 on the housing 23, but the ribs are not shown in FIG. The specific configuration of the rib 71 will be described later.
　上部筐体２３ａは板状の金属部材であって、下部筐体２３ｂの蓋になるように形成されている。下部筐体２３ｂは、筐体２３の本体部分となる。下部筐体２３ｂは、上部筐体２３ａにより覆われる面を開口し、開口した面以外の面は壁面になっている。下部筐体２３ｂの開口部が上部筐体２３ａにより塞いだ状態で、電子部品２１は、上部筐体２３ａ及び下部筐体２３ｂで形成される空間内に収容されている。上部筐体２３ａの質量は下部筐体２３ｂの質量よりも小さく、上部筐体２３ａの剛性は下部筐体２３ｂの剛性よりも低い。そのため、上部筐体２３ａは、下部筐体２３ｂよりも振動しやすい構造になっている。 The upper casing 23a is a plate-like metal member, and is formed to be a lid of the lower casing 23b. The lower housing 23 b is a main body portion of the housing 23. The lower housing 23b opens a surface covered by the upper housing 23a, and the surface other than the opened surface is a wall surface. With the opening of the lower housing 23b closed by the upper housing 23a, the electronic component 21 is accommodated in a space formed by the upper housing 23a and the lower housing 23b. The mass of the upper housing 23a is smaller than the mass of the lower housing 23b, and the rigidity of the upper housing 23a is lower than the rigidity of the lower housing 23b. Therefore, the upper housing 23a has a structure that is easier to vibrate than the lower housing 23b.
　上部筐体２３ａ及び下部筐体２３ｂは、ボルト６０により締結されている。図２（ａ）に示すように、上部筐体２３の表面は、矩形になっている。そして、上部筐体２３ａの表面において、四隅の部分がボルト６０による締結される部位（以下、締結部位とも称す。）となる。また、上部筐体２３ａの表面において、長辺に沿う部分には、四隅の締結部位の他に、四隅の間に位置する部分も締結部位となる。すなわち、締結部位は、矩形状の表面の外周部に設けられている。そして、上部筐体２３ａの表面の外周部と下部筐体２３ｂの側壁が、ボルト６０により締結されている。 The upper casing 23 a and the lower casing 23 b are fastened by bolts 60. As shown in FIG. 2A, the surface of the upper housing 23 is rectangular. Then, on the surface of the upper housing 23a, the four corner portions are portions to be fastened by the bolts 60 (hereinafter also referred to as fastening portions). In addition, on the surface of the upper housing 23a, in addition to the fastening portions at the four corners, a portion located between the four corners is also a fastening portion along the long side. That is, the fastening portion is provided on the outer peripheral portion of the rectangular surface. And the outer peripheral part of the surface of the upper housing | casing 23a and the side wall of the lower housing | casing 23b are fastened with the volt | bolt 60. FIG.
　図１に示すように、変速装置３０は、動力装置１０と駆動軸との間で、回転速度及びトルクを変換する。変速装置３０はボルト等により動力装置１０に締結されている。防振支持装置４０は、動力装置１０、電力変換装置２０、及び変速装置３０を、車体に支持している。また防振支持装置４０は、動力装置１０、電力変換装置２０、及び変速装置３０の各振動が車体に伝搬することを防ぐための装置である。防振支持装置４０は、樹脂で形成されている。防振支持装置４０は変速装置３０に固定されている。防振支持装置４０はバネ５０を介して車体に固定されている。 As shown in FIG. 1, the transmission 30 converts the rotational speed and torque between the power unit 10 and the drive shaft. The transmission 30 is fastened to the power unit 10 by bolts or the like. The anti-vibration support device 40 supports the power device 10, the power conversion device 20, and the transmission 30 on the vehicle body. The anti-vibration support device 40 is a device for preventing the vibrations of the power device 10, the power conversion device 20, and the transmission 30 from propagating to the vehicle body. The anti-vibration support device 40 is made of resin. The anti-vibration support device 40 is fixed to the transmission 30. The anti-vibration support device 40 is fixed to the vehicle body via a spring 50.
　次に、筐体２３の振動について説明する。例えば、電子部品２１を構成するスイッチング素子のスイッチング動作により、電子部品２１が振動した場合には、電力変換装置２０が起振源となる。筐体２３は、電子部品２１を覆うような形状をしているため、筐体２３は、電力変換装置２０の他の部品と比べて振動し易い。また、例えば、動力装置１０が起振源となり振動が発生した場合には、振動は電力変換装置２０に伝搬する。動力装置１０は筐体２３に締結されているため、筐体２３が振動する。また、筐体２３の振動周波数が、変速装置３の固有値（固有振動周波数）と近接している場合には、共振によって、動力ユニットの騒音は大きくなる。 Next, the vibration of the housing 23 will be described. For example, when the electronic component 21 vibrates due to the switching operation of the switching element constituting the electronic component 21, the power conversion device 20 serves as a vibration source. Since the housing 23 is shaped to cover the electronic component 21, the housing 23 is likely to vibrate compared to other components of the power conversion device 20. For example, when the power device 10 becomes a vibration source and vibration is generated, the vibration propagates to the power conversion device 20. Since the power unit 10 is fastened to the housing 23, the housing 23 vibrates. Further, when the vibration frequency of the casing 23 is close to the natural value (natural vibration frequency) of the transmission 3, the noise of the power unit increases due to resonance.
　図３は、上部筐体２３ａの振動を説明するための図である。図３（ａ）は上部筐体２３ａの平面図を示し、図３（ｂ）は図３（ａ）のIII-III線に沿う断面図である。また図３（ｂ）の点線は、上部筐体２３ａの振動モードを表している。 FIG. 3 is a diagram for explaining the vibration of the upper casing 23a. 3A is a plan view of the upper housing 23a, and FIG. 3B is a cross-sectional view taken along the line III-III in FIG. 3A. The dotted line in FIG. 3B represents the vibration mode of the upper housing 23a.
　上部筐体２３ａの表面の外周部はボルト６０により締結されている。そのため外周部の剛性は高くなっている。一方、表面の中央部分の剛性は低い。そのため、筐体２３に振動が伝わると、上部筐体２３ａは、図３（ｂ）の点線に示すように振動する。そして、振動による上部筐体２３ａの変形量は、上部筐体２３ａの表面のうち中央部分Ａで最も大きくなる。すなわち、中央部分Ａが振動の腹となり、外周部分が振動の節となる。また、図３（ｂ）の点線は１次モードの振動波形を示しているが、筐体２３には、１次モードの振動だけではなく、２次モードの振動も発生する。 The outer peripheral part of the surface of the upper housing 23a is fastened with bolts 60. Therefore, the rigidity of the outer peripheral portion is high. On the other hand, the rigidity of the central portion of the surface is low. Therefore, when vibration is transmitted to the housing 23, the upper housing 23a vibrates as indicated by a dotted line in FIG. The amount of deformation of the upper casing 23a due to vibration is greatest at the central portion A of the surface of the upper casing 23a. That is, the central portion A becomes a vibration antinode, and the outer peripheral portion becomes a vibration node. Also, the dotted line in FIG. 3B shows the vibration waveform in the primary mode, but the casing 23 generates not only the vibration in the primary mode but also the vibration in the secondary mode.
　１次モードの振動に対しては、例えば上部筐体２３ａの質量を増加させることで、抑制できる。一方、２次モードの振動の振動に対しては、上部筐体２３ａの質量を増加させただけでは、十分に抑制できない。２次モードの振動の振動に対しては、電力変換装置２０の固有値と周辺部品の固有値が近づかないように、上部筐体２３ａの固有値をずらすことで、抑制できる。そこで、本実施形態では、１次モードの振動だけではなく、２次モードの振動も抑制できるように、リブ７１が上部筐体２３ａに設けられている。 The vibration of the primary mode can be suppressed by increasing the mass of the upper housing 23a, for example. On the other hand, the vibration of the secondary mode vibration cannot be sufficiently suppressed only by increasing the mass of the upper casing 23a. The vibration of the secondary mode vibration can be suppressed by shifting the eigenvalue of the upper housing 23a so that the eigenvalue of the power conversion device 20 and the eigenvalue of the peripheral component do not approach each other. Therefore, in the present embodiment, the rib 71 is provided on the upper housing 23a so that not only the vibration in the primary mode but also the vibration in the secondary mode can be suppressed.
　図４は筐体２３及びリブ７１を説明するための図である。図４（ａ）は筐体２３及びリブ７１の平面図を示し、図４（ｂ）は筐体２３及びリブ７１の側面図を示す。リブ７１は上部筐体２３ａの振動を抑制するための部材であり、上部筐体２３ａの表面に設けられている。リブ７１は、筐体２３の金属と同じ金属で形成されている。リブ７１は、３本の直線のレールの形状になるように形成されている。また、３本のリブ７１ａ、７１ｂ、７１ｃの中点が、同じ位置となり、当該中点が、上部筐体２３ａの中央部分Ａに位置する。リブ７１ａは、中央部分Ａからボルト６０に向かう方向に沿って形成されている。ボルト６０は、四隅に位置するボルト６０の間に位置するボルトであって、上部筐体２３ａの短辺に沿う方向で対向するボルトである。短辺は、上部筐体２３ａの矩形状の表面を形成する四辺のうち、短い方の辺である。 FIG. 4 is a diagram for explaining the housing 23 and the rib 71. 4A is a plan view of the housing 23 and the rib 71, and FIG. 4B is a side view of the housing 23 and the rib 71. The rib 71 is a member for suppressing the vibration of the upper casing 23a, and is provided on the surface of the upper casing 23a. The rib 71 is made of the same metal as that of the housing 23. The rib 71 is formed in the shape of three straight rails. Further, the midpoints of the three ribs 71a, 71b, 71c are at the same position, and the midpoint is located at the central portion A of the upper housing 23a. The rib 71 a is formed along the direction from the central portion A toward the bolt 60. The bolts 60 are bolts positioned between the bolts 60 positioned at the four corners, and are opposed in the direction along the short side of the upper housing 23a. The short side is the shorter side of the four sides forming the rectangular surface of the upper housing 23a.
　リブ７１ｂは、中央部分Ａからボルト６０に向かう方向に沿って形成されている。ボルト６０は、上部筐体２３ａの表面の四隅に位置し、上部筐体２３ａの表面の対角線上に位置する。また、リブ７１ｃは、中央部分Ａからボルト６０に向かう方向に沿って形成されている。 The rib 71b is formed along the direction from the central portion A toward the bolt 60. The bolts 60 are located at the four corners of the surface of the upper housing 23a and are located on the diagonal lines of the surface of the upper housing 23a. The rib 71c is formed along the direction from the central portion A toward the bolt 60.
　すなわち、上部筐体２３ａの表面上において、リブ７１ａ、７１ｂ、７１ｃは、中央部分Ａから各ボルト６０に向かう方向に沿うように形成されている。言い換えると、リブ７１ａ、７１ｂ、７１ｃは、一対のボルト６０間を結ぶ線上に形成されており、リブ７１ａ、７１ｂ、７１ｃの中点が上部筐体２３ａの表面の腹に位置する。一対のボルト６０は、上部筐体２３ａの表面上で、中央部分Ａを境に対向している。 That is, on the surface of the upper casing 23a, the ribs 71a, 71b, 71c are formed along the direction from the central portion A toward each bolt 60. In other words, the ribs 71a, 71b, 71c are formed on a line connecting the pair of bolts 60, and the midpoint of the ribs 71a, 71b, 71c is located on the antinode of the surface of the upper housing 23a. The pair of bolts 60 are opposed to each other with the central portion A as a boundary on the surface of the upper housing 23a.
　上記のように、上部筐体２３ａにはリブ７１が設けられている。これにより、上部筐体２３ａの剛性がリブ７１によって高まる。さらに、リブ７１が、上部筐体２３ａの表面上の位置からボルト６０に向かう方向に沿って形成されているため、上部筐体２３ａの振動の固有値をずらすことができる。 As described above, the upper casing 23a is provided with the ribs 71. Thereby, the rigidity of the upper housing 23 a is increased by the rib 71. Furthermore, since the rib 71 is formed along the direction from the position on the surface of the upper housing 23a toward the bolt 60, the eigenvalue of the vibration of the upper housing 23a can be shifted.
　ところで、電力変換装置２０の振動を抑制する方法として、以下の方法が挙げられる。例えば、防振部材を動力装置１０と電力変換装置２０との間に配置する方法である。しかしながら、防振部材を設ける分、コストが高くなる。また、他の方法として、電力変換装置２０を防音部材で覆うことも考えられる。しかしながら、防音部材を設ける分、コストが高くなる。 By the way, as a method for suppressing the vibration of the power conversion device 20, the following method can be cited. For example, there is a method of arranging a vibration isolating member between the power device 10 and the power conversion device 20. However, the cost is increased by providing the vibration isolation member. As another method, it is conceivable to cover the power conversion device 20 with a soundproof member. However, the cost increases as the soundproofing member is provided.
　さらに他の方法として、筐体２３の振動面の質量を増加させることも考えられる。振動面は、筐体２３を構成する面のうち、振動が発生し易い面に相当する。しかしながら、単に質量増加だけで振動を抑制するためには、質量を大幅に増加しなければならない。また、筐体２３の振動面の剛性を高めることも考えられる。しかしながら、本実施形態のように、動力ユニットを構成する装置が密集して組み合わされている場合には、互いの装置間で共振することがないように、筐体２３の固有値は周囲の構成の固有値にから離れた値にしなければならない。そのため、結果的には筐体２３の質量が増加し、動力ユニットのサイズが大きくなってしまう。 As another method, it is conceivable to increase the mass of the vibration surface of the housing 23. The vibration surface corresponds to a surface on which vibration is easily generated among the surfaces constituting the housing 23. However, in order to suppress vibrations simply by increasing the mass, the mass must be significantly increased. It is also conceivable to increase the rigidity of the vibration surface of the housing 23. However, when the devices constituting the power unit are densely combined as in the present embodiment, the eigenvalue of the housing 23 is the value of the surrounding configuration so that the devices do not resonate. The value must be far from the eigenvalue. Therefore, as a result, the mass of the housing 23 increases, and the size of the power unit increases.
　一方、本実施形態では、リブ７１を筐体２３に設けることで、筐体２３の質量が増加し、１次モードの振動を抑制している。また、リブ７１が、上部筐体２３ａの表面の腹からボルト６０に向かい方向に沿って形成されているため、筐体２３の質量の増加を最小限に抑えつつ、２次モードの振動を抑制している。リブ７１を筐体２３に設けることで筐体２３の質量は増加するが、リブ７１による質量の増加に対して、筐体２３の固有値のずれ量が大きければ、筐体２３の固有値は、動力装置１０等の固有値から離すことができる。そのため、本実施形態は、単にリブ７１を筐体２３に設けるだけではなく、上部筐体２３ａの表面のうち、剛性の低い部分から高い部分に向けてリブを設けている。これにより、上部筐体２３ａの表面の剛性を高めつつ、動力装置１０等との共振を避けることができる。その結果として、本実施形態は、電力変換装置２０の振動を抑制し、動力ユニットの騒音を抑制できる。 On the other hand, in the present embodiment, the rib 71 is provided in the housing 23, thereby increasing the mass of the housing 23 and suppressing the vibration in the primary mode. Further, since the rib 71 is formed along the direction from the antinode of the surface of the upper housing 23a toward the bolt 60, the vibration of the secondary mode is suppressed while minimizing an increase in the mass of the housing 23. is doing. Although the mass of the housing 23 is increased by providing the rib 71 on the housing 23, if the deviation of the eigenvalue of the housing 23 is large with respect to the increase in the mass due to the rib 71, the eigenvalue of the housing 23 is the power It can be separated from the eigenvalue of the device 10 or the like. Therefore, in the present embodiment, the ribs 71 are not only provided on the housing 23 but also provided on the surface of the upper housing 23a from a low rigidity portion to a high portion. Thereby, resonance with the power unit 10 or the like can be avoided while increasing the rigidity of the surface of the upper housing 23a. As a result, this embodiment can suppress vibration of the power conversion device 20 and suppress noise of the power unit.
　また、電力変換装置２０が電気自動車等に搭載された場合には、簡易な構成、省スペース、かつ低コストで、電力変換装置２０の振動を抑制し、電力変換装置２０の騒音を抑制できる。その結果として、車室内の静寂性を向上させることができる。 Further, when the power conversion device 20 is mounted on an electric vehicle or the like, vibration of the power conversion device 20 can be suppressed and noise of the power conversion device 20 can be suppressed with a simple configuration, space saving, and low cost. As a result, the quietness in the passenger compartment can be improved.
　また本実施形態において、上部筐体２３ａの表面が振動する場合には、ボルト６０による締結部位が振動波の節となり、表面の中央部分が振動波の腹に相当する。そのため、リブ７１は振動波の腹の部分から節の部分に向かって形成されている。これにより、上部筐体２３ａの表面のうち、振動による変形量が多い部分の剛性が高まり、動力装置１０等との共振を避けることができる。その結果として、電力変換装置２０の振動を抑制し、動力ユニットの騒音を抑制できる。 In the present embodiment, when the surface of the upper housing 23a vibrates, the fastening portion by the bolt 60 becomes a node of the vibration wave, and the central portion of the surface corresponds to the antinode of the vibration wave. Therefore, the rib 71 is formed from the antinode portion of the vibration wave toward the node portion. As a result, the rigidity of the portion of the surface of the upper housing 23a where the amount of deformation due to vibration is large is increased, and resonance with the power unit 10 or the like can be avoided. As a result, vibration of the power conversion device 20 can be suppressed and noise of the power unit can be suppressed.
　なお、本実施形態は、リブ７１を、上部筐体２３ａの表面の外側に設けたが、内側に設けてもよい。上部筐体２３の一対の表面のうち、内側の面は、電子部品２１を臨む面である。 In this embodiment, the rib 71 is provided outside the surface of the upper housing 23a, but may be provided inside. Of the pair of surfaces of the upper housing 23, the inner surface is a surface facing the electronic component 21.
　また、本実施形態において、上部筐体２３ａの振動波の腹の部分が、上部筐体２３ａの表面の中央部分ではない場合には、リブ７１の中点を振動波の腹の位置に合わせることで、リブ７１の中点が表面の中央部分以外の位置になるように、リブ７１が構成されていてもよい。 In the present embodiment, when the antinode of the vibration wave of the upper housing 23a is not the central portion of the surface of the upper housing 23a, the midpoint of the rib 71 is adjusted to the position of the antinode of the vibration wave. Thus, the rib 71 may be configured so that the midpoint of the rib 71 is located at a position other than the central portion of the surface.
　また、本実施形態において、振動を抑制するための収容構造体は、電力変換装置２０に限らず、他の装置であってもよい。また上部筐体２３ａ及び下部筐体２３ｂを締結する締結部材は、ボルト６０に限らず、他の部材でもよい。 In the present embodiment, the housing structure for suppressing vibration is not limited to the power conversion device 20 and may be other devices. The fastening member that fastens the upper housing 23a and the lower housing 23b is not limited to the bolt 60, and may be another member.
　上記のボルト６０が本発明の「締結部材」に相当し、上部筐体２３ａが本発明の「第１部材」に相当し、下部筐体２３ｂが本発明の「第２部材」に相当し、リブ７１ａ～７１ｃが本発明の「第１リブ」に相当する。 The bolt 60 corresponds to the “fastening member” of the present invention, the upper housing 23a corresponds to the “first member” of the present invention, the lower housing 23b corresponds to the “second member” of the present invention, The ribs 71a to 71c correspond to the “first rib” of the present invention.
《第２実施形態》
　本発明の他の実施形態に係る電力変換装置２０を、図５を用いて説明する。本実施形態では上述した第１実施形態に対して、リブ７１ａ～７１ｃの先端部分がボルト６０に接している点が異なる。これ以外の構成は上述した第１実施形態と同じであり、その記載を援用する。図５（ａ）筐体２３の平面図を示し、図５（ｂ）は筐体２３の側面図を示す。 << Second Embodiment >>
The power converter device 20 which concerns on other embodiment of this invention is demonstrated using FIG. This embodiment differs from the first embodiment described above in that the tip portions of the ribs 71a to 71c are in contact with the bolts 60. Other configurations are the same as those in the first embodiment described above, and the description thereof is incorporated. FIG. 5A shows a plan view of the housing 23, and FIG. 5B shows a side view of the housing 23.
　リブ７１ａの両端の端部は、ボルト６０と接している。リブ７１ｂ、７１ｃの両端の端部はボルト６０と接している。上部筐体２３ａの外周部は、ボルト６０で締結されているため、剛性が高くなっている。すなわち、リブ７１ａ～７１ｃの端部が剛性の高い部分と接するように、リブ７１が設けられている。これにより、振動面の剛性を効果的に高めることができるので、質量増加を抑えながら、他部品との共振を避けることができる。その結果として、動力ユニットの騒音を抑制できる。 The ends of both ends of the rib 71a are in contact with the bolts 60. The ends of both ends of the ribs 71 b and 71 c are in contact with the bolt 60. Since the outer peripheral portion of the upper housing 23a is fastened by the bolt 60, the rigidity is high. That is, the rib 71 is provided so that the end portions of the ribs 71a to 71c are in contact with the portion having high rigidity. Thereby, since the rigidity of the vibration surface can be increased effectively, resonance with other components can be avoided while suppressing an increase in mass. As a result, the noise of the power unit can be suppressed.
《第３実施形態》
　本発明の他の実施形態に係る電力変換装置２０を、図６を用いて説明する。本実施形態では上述した第１実施形態に対して、上部筐体２３ａの構成が異なる。これ以外の構成は上述した第１実施形態と同じであり、第１、第２実施形態の記載を適宜、援用する。図６（ａ）は上部筐体２３ａの平面図を示し、図６（ｂ）は図６（ａ）のVI－VI線に沿う断面図を示す。なお、図６（ａ）の紙面の法線方向に沿った面が、図６（ｂ）で示される断面となる。 << Third Embodiment >>
The power converter device 20 which concerns on other embodiment of this invention is demonstrated using FIG. In the present embodiment, the configuration of the upper housing 23a is different from the first embodiment described above. Other configurations are the same as those of the first embodiment described above, and the descriptions of the first and second embodiments are incorporated as appropriate. FIG. 6A is a plan view of the upper housing 23a, and FIG. 6B is a cross-sectional view taken along the line VI-VI in FIG. 6A. Note that a surface along the normal direction of the paper surface of FIG. 6A is a cross section shown in FIG.
　上部筐体２３ａは、中央部分Ａを中心とした肉厚部２３０を有している。肉厚部２３０の厚さは、肉厚部２３０以外の他部分の厚さよりも厚くなっている。肉厚部２３０以外の他の部分には、上部筐体２３ａの表面の外周部が含まれる。肉厚部２３０は、上部筐体２３ａと一体になるよう構成されている。すなわち、上部筐体２３ａは、VI－VI線に沿う断面において、振動の腹の部分が腹以外の他部分よりも厚くなるように構成されている。また、上部筐体２３ａの厚さは、振動の腹の部分で最も厚くなり、外周部に向かって徐々に小さくなっている。 The upper housing 23a has a thick portion 230 centered on the central portion A. The thickness of the thick part 230 is thicker than the thickness of other parts other than the thick part 230. The part other than the thick part 230 includes the outer peripheral part of the surface of the upper housing 23a. The thick part 230 is configured to be integrated with the upper casing 23a. That is, the upper housing 23a is configured such that the antinode portion of the vibration is thicker than the other portions other than the antinode in the cross section along the line VI-VI. The thickness of the upper housing 23a is the thickest at the vibration antinode, and gradually decreases toward the outer periphery.
　これにより、本実施形態は、上部筐体２３ａの振動面となる表面の剛性を効果的に高めることができ、振動による変形量を抑制することできる。また他部品との共振を避けることができる。その結果として、動力ユニットの騒音を抑制できる。 Thereby, according to the present embodiment, the rigidity of the surface serving as the vibration surface of the upper housing 23a can be effectively increased, and the amount of deformation due to vibration can be suppressed. Also, resonance with other parts can be avoided. As a result, the noise of the power unit can be suppressed.
《第４実施形態》
　本発明の他の実施形態に係る電力変換装置２０を、図７を用いて説明する。本実施形態では上述した第１実施形態に対して、上部筐体２３ａにリブ７２ａ～７２ｃを設ける点が異なる。これ以外の構成は上述した第１実施形態と同じであり、第１、第２実施形態の記載を適宜、援用する。図７（ａ）は上部筐体２３ａの平面図を示し、図７（ｂ）は図７（ａ）のVII－VII線に沿う断面図を示す。なお、図７（ａ）の紙面の法線方向に沿った面が、図７（ｂ）で示される断面となる。 << 4th Embodiment >>
The power converter device 20 which concerns on other embodiment of this invention is demonstrated using FIG. This embodiment is different from the first embodiment described above in that ribs 72a to 72c are provided on the upper housing 23a. Other configurations are the same as those of the first embodiment described above, and the descriptions of the first and second embodiments are incorporated as appropriate. 7A shows a plan view of the upper housing 23a, and FIG. 7B shows a cross-sectional view taken along the line VII-VII in FIG. 7A. Note that a surface along the normal direction of the paper surface of FIG. 7A is a cross section shown in FIG. 7B.
　上部筐体２３ａの表面には、リブ７１ａ～７１ｃ及びリブ７２ａ～７２ｃが設けられている。リブ７２ａ～７２ｃは、それぞれ半径の異なる円の形状になるように構成されている。リブ７２ａの直径が最も小さく、リブ７２ｃの直径が最も大きい。そして、円形状のリブ７２ａ～７２ｃの中心点は同一となり、リブ７１ａ～７１ｃの中心点は、上部筐体２３ａの表面の中央部分Ａに位置する。すなわち、リブ７１ａ～７１ｃは上部筐体２３ａの表面の中央部分Ａを中心とした円に沿うように形成されている。 On the surface of the upper casing 23a, ribs 71a to 71c and ribs 72a to 72c are provided. Each of the ribs 72a to 72c is configured to have a circular shape having a different radius. The rib 72a has the smallest diameter and the rib 72c has the largest diameter. The center points of the circular ribs 72a to 72c are the same, and the center points of the ribs 71a to 71c are located at the center portion A of the surface of the upper housing 23a. That is, the ribs 71a to 71c are formed along a circle centered on the central portion A of the surface of the upper housing 23a.
　本実施形態において、上部筐体２３ａは、VII－VII線に沿う断面において、振動の腹の部分にリブ７２ａ～７２ｃが設けられている。これにより、上部筐体２３ａの腹の部分の剛性が高まる。本実施形態は、第３実施形態のような肉厚部２３０を筐体２３に設けなくても、肉厚部２３０と同様の効果を、リブ７２ａ～７２ｃによって発揮させることができる。また、第３実施形態のような肉厚部２３０を有する上部筐体２３ａを鋳造にて製造する場合には、高度な品質管理が求められる。一方、本実施形態のように、肉厚部２３０の代わりに、リブ７２ａ～７２ｃを上部筐体２３ａに設けることで、上部筐体２３ａを鋳造にて容易に製造できる。そのため、品質管理を必要以上に高めることなく、上部筐体２３ａの鋳造品質を保つことができる。 In the present embodiment, the upper housing 23a is provided with ribs 72a to 72c at the antinodes of vibration in the cross section along the line VII-VII. Thereby, the rigidity of the belly part of the upper housing | casing 23a increases. In the present embodiment, even if the thick portion 230 is not provided in the housing 23 as in the third embodiment, the same effects as the thick portion 230 can be exhibited by the ribs 72a to 72c. Moreover, when manufacturing the upper housing | casing 23a which has the thick part 230 like 3rd Embodiment by casting, high quality control is calculated | required. On the other hand, by providing the ribs 72a to 72c in the upper casing 23a instead of the thick portion 230 as in the present embodiment, the upper casing 23a can be easily manufactured by casting. Therefore, the casting quality of the upper housing 23a can be maintained without increasing quality control more than necessary.
　上記のリブ７２ａ～７２が本発明の「第２リブ」に相当する。 The ribs 72a to 72 correspond to the “second rib” of the present invention.
《第５実施形態》
　本発明の他の実施形態に係る電力変換装置２０を、図８を用いて説明する。本実施形態では上述した第１実施形態に対して、リブ７１ａ～７１ｃの形状が異なる。これ以外の構成は上述した第１実施形態と同じであり、第１、第２実施形態の記載を適宜、援用する。図８（ａ）は上部筐体２３ａの平面図を示し、図８（ｂ）は図８（ａ）のVIIIａ－VIIIａ線に沿う断面図を示し、図８（ｃ）は図８（ａ）のVIIIｂ－VIIIｂ線に沿う断面図を示す。なお、VIIIａ－VIIIａ線に沿う断面及びVIIIｂ－VIIIｂ線に沿う断面は、上部筐体２３ａの中央部分Ａから、四隅に位置するボルト６０に向かう方向を法線方向とする面である。また、VIIIａ－VIIIａ線に沿う断面は、上部筐体２３ａの中央部分Ａと四隅に位置するボルト６０との間で、VIIIｂ－VIIIｂ線に沿う断面よりも、当該中央部分Ａに近い面である。 << 5th Embodiment >>
The power converter device 20 which concerns on other embodiment of this invention is demonstrated using FIG. In the present embodiment, the shapes of the ribs 71a to 71c are different from those of the first embodiment described above. Other configurations are the same as those of the first embodiment described above, and the descriptions of the first and second embodiments are incorporated as appropriate. 8A shows a plan view of the upper housing 23a, FIG. 8B shows a cross-sectional view taken along the line VIIIa-VIIIa of FIG. 8A, and FIG. 8C shows FIG. 8A. Sectional drawing which follows the VIIIb-VIIIb line | wire is shown. The cross section along the line VIIIa-VIIIa and the cross section along the line VIIIb-VIIIb are surfaces whose normal direction is the direction from the central portion A of the upper housing 23a toward the bolts 60 located at the four corners. The cross section taken along the line VIIIa-VIIIa is a surface closer to the central part A than the cross section taken along the line VIIIb-VIIIb between the central part A of the upper housing 23a and the bolts 60 located at the four corners. .
　リブ７１ａ～７１ｃは、中央部分Ａの厚さが最も厚く、ボルト６０に向かって徐々に薄くなっている。言い替えると、リブ７１ａ～７１ｃは、上部筐体２３ａの腹の部分に近いほど、厚みが厚くなるように構成されている。例えば、リブ７１ｃの断面について、VIIIａ－VIIIａ線に沿う断面の面積をＳａとし、VIIIｂ－VIIIｂ線に沿う断面の面積Ｓｂとした場合には、Ｓａ＞Ｓｂが成立する。すなわち、リブ７１ｃをVIIIａ－VIIIａ線の断面で切ったとき断面積が、VIIIｂ－VIIIｂ線の断面で切ったとき断面積よりも大きくなるように、リブ７１ｃが形成されている。リブ７１ａ、リブ７１ｂも、リブ７１ｃと同様に形成されている。 The ribs 71a to 71c have the thickest central portion A and gradually become thinner toward the bolt 60. In other words, the ribs 71a to 71c are configured such that the closer to the belly portion of the upper housing 23a, the thicker the thickness. For example, regarding the cross section of the rib 71c, when the area of the cross section along the line VIIIa-VIIIa is Sa and the area Sb of the cross section along the line VIIIb-VIIIb, Sa> Sb is satisfied. That is, the rib 71c is formed so that the cross-sectional area when the rib 71c is cut along the section VIIIa-VIIIa line is larger than the cross-sectional area when the rib 71c is cut along the section VIIIb-VIIIb line. The rib 71a and the rib 71b are also formed in the same manner as the rib 71c.
　本実施形態において、リブ７２ａ～７２ｃの断面の面積が上部筐体２３ａの表面の腹の部分に近いほど大きくなるように、リブ７２ａ～７２ｃが構成されている。これにより、本実施形態は、第３実施形態のような肉厚部２３０を筐体２３に設けなくても、肉厚部２３０と同様の効果を、リブ７１ａ～７１ｃによって発揮させることができる。 In the present embodiment, the ribs 72a to 72c are configured such that the cross-sectional areas of the ribs 72a to 72c increase as the area of the rib on the surface of the upper housing 23a becomes closer. Accordingly, in the present embodiment, the ribs 71a to 71c can exhibit the same effect as the thick portion 230 without providing the thick portion 230 in the housing 23 as in the third embodiment.
２０…電力変換装置
２１…電子部品
２３…筐体
　２３ａ…上部筐体
　２３ｂ…下部筐体
６０…ボルト
７１、７１ａ～７１ｃ、７２ａ～７２ｃ…リブ DESCRIPTION OF SYMBOLS 20 ... Power converter 21 ... Electronic component 23 ... Case 23a ... Upper case 23b ... Lower case 60 ... Bolt 71, 71a-71c, 72a-72c ... Rib

Claims (6)

  1. 　電子部品と、
    　第１部材及び第２部材を有し、前記電子部品を収容する筐体と、
    　前記第１部材と前記第２部材を締結する締結部材と、
    　前記第１部材に設けられているリブとを備え、
    前記第１部材は、前記第１部材の表面上に、前記締結部材により締結されている締結部位を有し、
    前記リブは、前記表面上の所定の位置から前記締結部位に向かう方向に沿って形成された第１リブを有する
    ことを特徴とする収容構造体。     Electronic components,
    A housing having a first member and a second member and containing the electronic component;
    A fastening member for fastening the first member and the second member;
    A rib provided on the first member,
    The first member has a fastening portion fastened by the fastening member on the surface of the first member;
    The said rib has a 1st rib formed along the direction which goes to the said fastening part from the predetermined position on the said surface, The accommodation structure characterized by the above-mentioned.
  2. 請求項１記載の収容構造体において、
    前記締結部位は、前記第１部材の振動により生じる振動波の節に相当し、
    前記所定の位置は、前記振動波の腹に相当する
    ことを特徴とする収容構造体。     The housing structure according to claim 1,
    The fastening portion corresponds to a node of a vibration wave generated by the vibration of the first member,
    The accommodation structure according to claim 1, wherein the predetermined position corresponds to an antinode of the vibration wave.
  3. 請求項１又は２記載の収容構造体において、
    前記第１リブは、前記第１リブの端部で前記締結部位と接している
    ことを特徴とする収容構造体。     The containing structure according to claim 1 or 2,
    The housing structure according to claim 1, wherein the first rib is in contact with the fastening portion at an end of the first rib.
  4. 請求項１～３のいずれか一項に記載の収容構造体において、
    前記第１部材は、第１断面において、前記所定の位置の厚さが前記所定の位置以外の部分の厚さより厚くなるように形成されており、
    前記第１断面は、前記表面の法線方向に沿った面である
    ことを特徴とする収容構造体。     The housing structure according to any one of claims 1 to 3,
    The first member is formed in the first cross section so that the thickness of the predetermined position is thicker than the thickness of a portion other than the predetermined position,
    The housing structure according to claim 1, wherein the first cross section is a surface along a normal direction of the surface.
  5. 請求項１～３のいずれか一項に記載の収容構造体において、
    前記リブは、前記表面上で前記所定の位置を中心とした円に沿って形成された第２リブを有する
    ことを特徴とする収容構造体。     The housing structure according to any one of claims 1 to 3,
    The said rib has the 2nd rib formed along the circle centering on the said predetermined position on the said surface, The accommodation structure characterized by the above-mentioned.
  6. 請求項１～３のいずれか一項に記載の収容構造体において、
    前記第１リブは、前記第１リブを第２断面で切ったときの断面積が前記第１リブを第３断面で切ったときの断面積よりも大きくなるように形成されており、
    前記第２断面及び前記第３断面は、前記所定の位置から前記締結部位に向かう方向を法線方向とする面であり、
    前記第２断面は、前記所定の位置と前記締結部位の位置との間で、前記第３断面よりも前記所定の位置に近い面である
    ことを特徴とする収容構造体。     The housing structure according to any one of claims 1 to 3,
    The first rib is formed such that a cross-sectional area when the first rib is cut along a second cross section is larger than a cross-sectional area when the first rib is cut along a third cross section;
    The second cross section and the third cross section are surfaces whose normal direction is a direction from the predetermined position toward the fastening portion,
    The housing structure, wherein the second cross section is a surface closer to the predetermined position than the third cross section between the predetermined position and the position of the fastening portion.
PCT/JP2015/065624 2014-07-10 2015-05-29 Electronic-component-accommodating structure WO2016006361A1 (en)

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