JP2016082000A - Electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric apparatus capable of protecting an electronic component in the housing body well, when removing a cover from the housing body.SOLUTION: In a PCU1, a plurality of screw holes 23h, into which a bolt 4 is screwed respectively, are formed in the sidewall 22 of the housing body 2. A cover 5 includes a plurality of fastening parts 55, 550 projecting outward from the outer periphery of the cover 5 (a flange 52), and having an insertion hole 55h into which the bolt 4 is inserted. At the tip of the fastening part 550 provided in the cover 5, an extension 55x extending along the outer peripheral surface of the sidewall 22 of the housing body 2 to the side closer to the bottom 21 side than the end face 22s of the sidewall 22 is formed. The extension 55x faces an electronic component 30x housed in the housing body 2, via the bolt 4 and sidewall 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric device including a plurality of electronic components, a housing body that accommodates the plurality of electronic components, and a cover that is fastened to the housing body so as to cover the plurality of electronic components.

  Conventionally, as a housing structure for accommodating electronic devices, a housing body having a mounting flange piece formed on the outer periphery of an opening, and a plurality of taps and arranged so as to be in direct contact with the housing body And a plurality of bolts that are inserted through a plurality of mounting holes formed in the mounting flange piece portions and screwed into taps of the lid body (for example, patents) Reference 1). In this housing structure, the mounting flange piece of the housing main body is formed with a concave stepped portion so as to be located inward of the housing main body with respect to the portion where the lid abuts. The packing is accommodated. The wall surface of the concave step portion is formed with a projection that crushes the seal surface of the packing facing the concave step portion, and the gap between the housing body and the lid body is sealed by crushing the packing toward the lid body by the projection. The

Japanese Patent Laid-Open No. 11-17361

  When the electric device having the above-described casing structure is used for a certain period of time, the packing adheres (crimps) to the lid, for example. For this reason, when removing the cover from the housing body for inspection of electronic equipment, etc., it is necessary to insert a tool such as a screwdriver between the housing body and the cover and pull the cover away from the housing body. May occur. At this time, if no measures are taken, there is a possibility that the tool hits an electronic device inside the housing, and the electronic component is damaged.

  Accordingly, the main object of the present invention is to provide an electric device that can favorably protect the electronic components in the housing body when the cover is removed from the housing body.

  An electrical apparatus according to the present invention includes a plurality of electronic components, a bottom portion and a side wall portion extending from the bottom portion, and a housing body that accommodates the plurality of electronic components, and covers the plurality of electronic components. In an electrical device including a cover fastened to the housing body via a plurality of bolts, the side wall portion of the housing body has a plurality of screw holes into which the bolts are screwed. The cover includes a plurality of fastening portions that protrude outward from the outer periphery of the cover and have insertion holes through which the bolts are inserted. At least one of the plurality of fastening portions has a distal end portion, An extending portion is formed along the outer peripheral surface of the side wall portion so as to extend to the bottom side from the end surface of the side wall portion, and the extending portion is connected to the housing body via the bolt and the side wall portion. Housed in said Characterized in that at least any one opposing number electronic parts.

  In this electrical apparatus, a plurality of screw holes into which the bolts are screwed are formed in the side wall portion of the housing body, and the covers protrude outward from the outer periphery of the cover and are inserted through the bolts. A plurality of fastening portions having holes are included. In addition, at least one of the plurality of fastening portions provided on the cover is formed with an extending portion extending toward the bottom side from the end surface of the side wall portion along the outer peripheral surface of the side wall portion of the housing body. Has been. And the said extension part opposes at least any one of the some electronic component accommodated in the housing body via a volt | bolt and a side wall part. As a result, when removing the cover from the housing body, it becomes possible to prevent a tool from being inserted between the housing body and the cover around the fastening portion having the extending portion. It is possible to satisfactorily suppress the tool inserted between the two from hitting an electronic component disposed in the vicinity of the fastening portion. Therefore, in this electrical apparatus, it is possible to satisfactorily protect the electronic components in the casing body when the cover is removed from the casing body. Further, by forming the extending portion in the fastening portion of the cover in this way, it is not necessary to provide a portion corresponding to the extending portion between the adjacent fastening portions of the cover, and a portion between the fastening portions of the cover. Can be reduced in rigidity. Thereby, the deformation | transformation of the part between the fastening parts of a cover according to the change of ambient temperature is permitted, and it suppresses the loosening of the volt | bolt resulting from the deformation | transformation of the part between the said fastening parts being controlled well. Is possible.

  A sealing material such as a liquid or solid gasket or packing may be disposed between the end face of the side wall portion of the housing body and the cover. Furthermore, the housing body and the cover may be formed of different materials. In addition, at least one of the plurality of electronic components may be accommodated in the casing main body so as to protrude from the end face of the side wall portion of the casing main body to the side opposite to the bottom portion.

It is a disassembled perspective view which shows the electric equipment by this invention. FIG. 2 is an enlarged partial cross-sectional view illustrating a main part of the electric device of FIG. 1.

  Next, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing a power control device (hereinafter referred to as “PCU”) 1 which is an electric device according to the present invention, and FIG. 2 is an enlarged partial cross-sectional view showing a main part of the PCU 1. The PCU 1 shown in FIGS. 1 and 2 is for driving a synchronous generator motor (AC motor) mounted on a hybrid vehicle and an electric vehicle (not shown). The PCU 1 includes a voltage conversion module (boost converter) that boosts power from a battery (not shown) such as a lithium ion secondary battery or a nickel hydride secondary battery, a capacitor module, an inverter that drives an electric motor, and the like (both shown) (Omitted). Further, as shown in FIG. 1, the PCU 1 is a circuit in which a casing body 2 that houses a voltage conversion module, a capacitor module, an inverter, and the like, and a control circuit (microcomputer) that controls the inverter and the voltage conversion module are mounted. A substrate 3 and a cover 5 fixed to the housing body 2 via a plurality of bolts 4 are included.

  In the present embodiment, the casing body 2 is formed into a bottomed cylindrical shape by casting, for example, an aluminum alloy, and has a rectangular bottom portion 21, and is erected (extends) from the bottom portion 21, and the outer periphery of the bottom portion 21. And a side wall portion 22 having a rectangular frame shape extending along the line. A plurality of projecting portions 23 projecting outward from the outer peripheral surface are formed on the side wall portion 22 at intervals in the circumferential direction. Each overhang 23 is formed with a screw hole 23h that opens in the end surface 22s of the side wall 22 (and overhang 23). The voltage conversion module, the capacitor module, and the inverter described above are placed on the surface of the bottom portion 21 through an opening on one end side (upper side in FIG. 1) of the housing body 2, and via a bolt or the like (not shown). Fixed to the bottom 21 and the like.

  A plurality of electronic components 30 constituting the above-described control circuit are mounted on the circuit board 3. The circuit board 3 is fastened to a plurality of pedestal portions (not shown) formed inside the housing body 2 via a plurality of bolts (not shown). Thereby, the voltage conversion module, the capacitor module, and the inverter in the housing body 2 are covered with the circuit board 3. Further, in the present embodiment, the circuit board 3 is mounted on the circuit board 3 so as to be close to a part of the plurality of electronic components 30, that is, the inner peripheral surface of the side wall portion 22, as shown in FIG. In the embodiment, the two electronic components 30x are accommodated (arranged) in the casing body 2 so as to protrude from the end surface 22s of the side wall portion 22 of the casing body 2 to the side opposite to the bottom portion 21 (the upper side in FIG. 2). Is done.

  The cover 5 is formed, for example, by pressing a steel plate, and is fixed to the casing body 2 so as to cover the circuit board 3 accommodated in the casing body 2. As shown in FIG. 1, the cover 5 includes a top plate portion 51, a flange portion 52 formed along the outer periphery of the top plate portion 51 so as to surround the top plate portion 51, and an outer periphery of the flange portion 52. And a plurality of fastening portions 55 formed so as to protrude outward (protrude) at intervals in the circumferential direction. In the present embodiment, the top plate portion 51 is formed so that at least a part thereof protrudes (expands) from the flange portion 52 to one side (the side opposite to the housing body 2 and the upper side in FIG. 2). As a result, the entire circuit board 3 accommodated in the housing body 2 by the cover 5 so that a part of the plurality of electronic components 30 protrudes from the end surface 22s of the side wall portion 22 to the side opposite to the bottom portion 21. Can be covered. And by comprising the cover 5 in this way, the housing body 2 (side wall portion 22) can be reduced in height, thereby making it possible to reduce the weight of the housing body 2 and thus the PCU 1 as a whole.

  Each fastening portion 55 is formed with an insertion hole 55h through which the bolt 4 is inserted. Accordingly, the cover 5 can be firmly fixed to the housing body 2 by screwing the bolts 4 inserted into the insertion holes 55 h of the fastening portions 55 into the corresponding screw holes 23 h of the side wall portion 22. In the present embodiment, prior to fixing the cover 5 to the housing body 2, a liquid gasket (FIPG: Formed in Place Gasket) (not shown) is applied to the end surface 22 s of the side wall portion 22, and the cover 5 is fastened to the housing body 2. Then, the gap between the side wall portion 22 and the cover 5 is sealed by the liquid gasket as the sealing material.

  Further, among the plurality of fastening portions 55 provided on the cover 5, the distal end portion (free end portion) of the fastening portion 550 that is positioned in the vicinity of the electronic component 30 x is formed on the outer peripheral surface of the side wall portion 22. An extension part (rib) 55x is formed so as to extend along the bottom part 21 side from the end surface 22s of the side wall part 22 along the side. When the cover 5 is fixed to the housing body 2, the extension portion 55 x is connected to the end surface of the side wall portion 22 via the bolt 4 and the side wall portion 22 (the overhang portion 23) as shown in FIG. 2. It opposes the above-mentioned electronic component 30x accommodated in the housing body 2 so as to protrude to the opposite side of the bottom 21 from 22s. That is, when the extension portion 55 x is viewed from the front, the extension portion 55 x overlaps the two electronic components 30 x in the housing body 2 and the cover 5. In the present embodiment, the fastening portion 550 having the extending portion 55 x is formed wider than the other main fastening portions 55.

  When a certain period of time has elapsed after the PCU 1 configured as described above is mounted on the vehicle, the liquid gasket adheres (crimps) to both the side wall portion 22 (end surface 22s) of the housing body 2 and the cover 5. For this reason, when removing the cover 5 from the housing body 2 for inspection, maintenance, etc. of the PCU 1, a tool such as a screwdriver is inserted between the side wall portion 22 of the housing body 2 and the cover 5 so as to open it. Therefore, the cover 5 needs to be pulled away from the housing body 2. At this time, as described above, the PCU 1 has the extending portion 55x because the extending portion 55x extending from the end surface 22s of the side wall portion 22 toward the bottom portion 21 side is formed in the fastening portion 550 of the cover 5. It is possible to prevent a tool from being inserted between the side wall portion 22 of the housing body 2 and the cover 5 around the fastening portion 550. Thereby, when removing the cover 5 from the housing body 2, the tool inserted between the housing body 2 and the cover 5 comes close to the fastening portion 550 and the bottom portion 21 than the end surface 22 s of the side wall portion 22. Can be satisfactorily suppressed from hitting the electronic component 30x protruding to the opposite side. Therefore, the PCU 1 can satisfactorily protect the electronic component 30x in the casing body 2 when the cover 5 is removed from the casing body 2.

  Furthermore, by forming the extension part 55x in the fastening part 550 of the cover 5, it is not necessary to provide a thing (rib) corresponding to the extension part 55x between the fastening parts 55 adjacent to each other in the flange part 52. It becomes possible to reduce the rigidity of the flange portion 52 between the adjacent fastening portions 55. Thereby, when the ambient temperature changes, the deformation (expansion / contraction) of the portion between the fastening portions 55 of the cover 5 formed of the steel plate having a lower thermal expansion coefficient than that of the aluminum alloy is allowed, and the ambient temperature changes. Accordingly, the movement of the fastening portions 55 and 550 with respect to the housing main body 2 can be satisfactorily suppressed. As a result, it is possible to satisfactorily suppress the loosening of the bolt 4 caused by the deformation of the portion between the fastening portions 55 of the cover 5 being restricted.

  As described above, in the PCU 1 as an electric device, a plurality of screw holes 23h into which the bolts 4 are screwed are formed in the side wall portion 22 of the housing body 2, and the cover 5 is connected to the cover 5 (flange). A plurality of fastening portions 55 and 550 that protrude outward from the outer periphery of the portion 52) and have insertion holes 55h through which the bolts 4 are inserted. Further, an extended portion 55 x extending from the end surface 22 s of the side wall portion 22 toward the bottom portion 21 along the outer peripheral surface of the side wall portion 22 of the housing body 2 is provided at the distal end portion of the fastening portion 550 provided in the cover 5. Is formed. The extending portion 55 x faces the electronic component 30 x accommodated in the housing body 2 via the bolt 4 and the side wall portion 22. Thereby, when removing the cover 5 from the housing body 2, the electronic component 30 x in the housing body 2 can be well protected, and the loosening of the bolts 4 can be well suppressed.

  In the above embodiment, a liquid gasket is disposed as a sealing material between the end surface 22s of the side wall 22 of the housing body 2 and the cover 5, but a solid gasket or packing is disposed instead of the liquid gasket. Also good. Furthermore, in the said embodiment, although the housing body 2 is formed of an aluminum alloy and the cover 5 is formed of a steel plate, the housing body 2 and the cover 5 may be formed of different materials other than these. It may be formed of the same material. Further, in the above embodiment, the electronic component 30x facing the extending portion 55x of the fastening portion 550 is accommodated in the housing body 2 so as to protrude to the opposite side of the bottom portion 21 from the end surface 22s of the side wall portion 22. However, it is not limited to this. That is, the extending portion 55x as described above is opposed to the fastening portion 55 adjacent to the electronic component 30 housed in the housing body 2 so as not to protrude from the end surface 22s of the side wall portion 22 to the side opposite to the bottom portion 21. May be provided. Further, the extending portion 55 x may be provided in the plurality of fastening portions 55 and 550 of the cover 5. In addition, it goes without saying that the above-described configuration may be applied to electric devices other than the PCU 1.

  And this invention is not limited to the said embodiment at all, and it cannot be overemphasized that a various change can be made within the range of the extension of this invention. Furthermore, the mode for carrying out the invention described above is merely a specific embodiment of the invention described in the column for solving the problem, and is described in the column for means for solving the problem. It is not intended to limit the elements of the invention.

  The present invention can be used in the electrical equipment manufacturing industry and the like.

  DESCRIPTION OF SYMBOLS 1 Power control unit (PCU), 2 Case main body, 3 Circuit board, 4 Bolt, 5 Cover, 21 Bottom part, 22 Side wall part, 22s End surface, 23 Overhang | projection part, 23h Screw hole, 30, 30x Electronic component, 51 Top Plate part, 52 flange part, 55,550 fastening part, 55h insertion hole, 55x extending part.

Claims (1)

A housing body having a plurality of electronic components, a bottom portion and a side wall portion extending from the bottom portion, and housing the plurality of electronic components; and a plurality of housing portions on the housing body so as to cover the plurality of electronic components In an electrical device provided with a cover fastened through a bolt,
A plurality of screw holes into which the bolts are screwed are formed in the side wall portion of the housing body,
The cover includes a plurality of fastening portions that protrude outward from the outer periphery of the cover and have insertion holes through which the bolts are inserted,
At least one tip portion of the plurality of fastening portions is formed with an extending portion extending along the outer peripheral surface of the side wall portion toward the bottom side from the end surface of the side wall portion,
The electrical device according to claim 1, wherein the extending portion is opposed to at least one of the plurality of electronic components housed in the housing body via the bolt and the side wall portion.

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