JP6492822B2 - Rotating electrical machine structure - Google Patents

Description

  The present invention relates to a rotating electrical machine structure including a rotating electrical machine and a power converter.

  Patent Document 1 below discloses a technique in which a motor unit having a rotating electrical machine and an inverter unit having a power converter are integrated by sharing one housing. The inverter unit includes, as inverter parts, a power module that houses a power semiconductor element, a smoothing capacitor, a motor control board, and the like.

JP 2011-182480 A

  When the inverter part is fixed to the housing with a bolt in the inverter unit, the electronic parts of the inverter are adversely affected by vibrations of the motor, vibrations when traveling when applied to a vehicle, and the like.

  In view of the above, an object of the present invention is to suppress the adverse effect of vibration on electronic components of a power converter in a rotating electrical machine structure.

The present invention is arranged in a power conversion device housing portion of a housing having a rotating electrical machine housing portion, to which an attachment member to which the power conversion device is attached, a lid member fixed to the periphery of the opening of the power conversion device housing portion, And an elastic member that elastically supports the attachment member between the lid member and the housing in a state in which the member is fixed to the periphery of the opening.
The elastic member is formed of an elastic portion that is integral with the mounting member, and the elastic portion includes at least one cut-and-raised portion formed by cutting and raising from the mounting member. One cut-and-raised portion has a first bent portion that is bent so as to protrude toward the lid member side, and a second bent portion that is bent so as to protrude toward the housing side.

According to the present invention, the attachment member is elastically supported by sandwiching the elastic member of the attachment member to which the power converter is attached between the housing and the lid member. Thereby, the vibration which generate | occur | produces from a rotary electric machine is absorbed by an elastic member, and it can suppress that the electronic component of the power converter device attached to an attachment member receives a bad influence by vibration.
Since the elastic member is composed of an elastic part integral with the mounting member, the number of parts is reduced and the assembling work is facilitated as compared with the case where the elastic member is a separate part from the mounting member.
The cut-and-raised portion of the mounting member has a first bent portion that is bent so as to protrude toward the lid member, and a second bent portion that is bent so as to protrude toward the housing. For this reason, the attachment member can be elastically attached between the lid member and the housing by a simple configuration in which one cut and raised portion is provided.

It is a disassembled perspective view of the state which abbreviate | omitted the inverter components of the rotary electric machine structure concerning one Embodiment of this invention. It is a perspective view of the assembly | attachment state of the rotary electric machine structure of FIG. It is a perspective view of the inverter module in the rotary electric machine structure of FIG. It is a perspective view of the inverter cover in the rotary electric machine structure of FIG. It is AA sectional drawing of FIG. It is the perspective view which has abbreviate | omitted the inverter components in the state which removed the inverter cover of FIG. It is a perspective view which shows the other example corresponding to FIG. The other example of the elastic piece provided in the tray of the inverter module is shown, (a) is a perspective view, (b) is a side view, and (c) is a plan view. It is sectional drawing corresponding to FIG. 5 which shows the example which uses the spring as an elastic member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an exploded perspective view of the rotating electrical machine structure according to an embodiment of the present invention with the inverter parts omitted, and FIG. 2 is an assembled perspective view of the rotating electrical machine structure. The rotating electrical machine structure includes a housing body 1 having a substantially cylindrical shape as a housing. An inverter cover 5 as a lid member is attached to an upper portion of the cylindrical portion of the housing body 1 in FIG.

  The housing body 1 includes a cylindrical motor housing portion 7 and a rectangular parallelepiped inverter housing portion 9. A motor housing chamber 11 as a rotating electrical machine housing portion is formed in the motor housing portion 7. A motor 13 as a rotating electrical machine is housed in the motor housing chamber 11.

  Between the inverter housing part 9 and the inverter cover 5, an inverter accommodating chamber 15 as a power converter accommodating part is formed. An inverter module 17 including an inverter as a power conversion device is accommodated in the inverter accommodating chamber 15. The inverter cover 5 is fixed to a rectangular opening of the inverter accommodating chamber 15 by a fastener such as a bolt (not shown) or welding so as to close the opening.

  The inverter module 17 converts DC power from a battery (not shown) into AC power and supplies it to the motor 13 and is modularized using a tray 19 as an attachment member. In FIG. 1, only the tray 19 is shown, and the electronic components (inverter components) constituting the inverter are omitted, and an actual inverter module 17 on which the electronic components are mounted is shown in FIG.

  In the inverter module 17 shown in FIG. 3, a smoothing capacitor 21, a power module 23, and a driver board 25 are fixed as electronic components on a tray 19 with fasteners such as screws. The smoothing capacitor 21 smoothes a direct current from a battery (not shown). The power module 23 includes a power semiconductor element such as an IGBT and converts the smoothed direct current into an alternating current. The driver board 25 is a circuit board for controlling the power module 23.

  The power module 23 and the smoothing capacitor 21 are electrically connected by a wiring (not shown). The power module 23 and the driver board 25 are electrically connected by a pin terminal (not shown). The end of the driver board 25 opposite to the smoothing capacitor 21 is fixed to the tray 19 with screws through a spacer or the like. Electrical wiring between the power module 23 and the motor 13 in the motor housing chamber 11 is made through a through hole (not shown) of the tray 19 and a through hole 27 a provided in the bottom 27 of the inverter housing 9.

  In the inverter housing portion 9, the peripheral end surface 9 b of the rectangular opening 9 a protrudes upward in FIG. 1 on the opposite side of the motor housing portion 7 with respect to the bottom portion 27. The peripheral end surface 5a on the opening side of the inverter cover 5 shown in FIG. 4 is in contact with and fixed to the peripheral end surface 9b. The inverter housing portion 9 and the inverter cover 5 are fixed by welding a bolt (not shown) or the periphery.

  When the inverter cover 5 is fixed to the inverter housing part 9, the tray 19 of the inverter module 17 is attached so as to be sandwiched between the inverter cover 5 and the inverter housing part 9.

  As shown in FIG. 4, the peripheral end surface 5 a on the opening side of the inverter cover 5 has four corners and two substantially central portions in the longitudinal direction, a total of six locations projecting into the inner inverter housing chamber 15. A tray holding portion 5b is provided. The cover side tray holding portion 5b has a planar shape located on the same plane with respect to the peripheral end surface 5a.

  A rectangular housing-side tray holding portion 9c is provided on the bottom 27 of the inverter housing portion 9 in correspondence with the cover-side tray holding portion 5b. That is, the housing side tray holding portion 9c is provided at six places in total, four places at the corners and two places at approximately the center in the longitudinal direction.

  The housing side tray holding portion 9c has a flat surface facing the cover side tray holding portion 5b and is located between the bottom portion 27 and the peripheral end surface 9b. Therefore, in a state where the inverter cover 5 is fixed to the inverter housing part 9, as shown in FIG. 5, a gap S having a gap C is formed between the cover side tray holding part 5b and the housing side tray holding part 9c. Is done. The interval C is larger than the plate thickness of the plate-like tray 19.

  As shown in FIG. 6, the tray 19 of the inverter module 17 is located on the inner side of the peripheral end face 9b of the opening 9a in the state of being accommodated in the inverter accommodating chamber 15. In FIG. 6, inverter components are omitted as in FIG. The tray 19 is elastically supported between the cover side tray holding portion 5b shown in FIG. 4 and the housing side tray holding portion 9c shown in FIG. Hereinafter, an elastically supported configuration will be described.

  The tray 19 is integrally provided with a leaf spring-shaped elastic piece 19a as an elastic member at a position corresponding to the housing side tray holding portion 9c and the cover side tray holding portion 5b. That is, the elastic pieces 19a are provided at six places in total, that is, four places at the corners of the rectangular tray 19 and two places in the longitudinal center of the long side part.

  The tray 19 is made of, for example, a metal or resin made of a plate-like member, and the elastic piece 19a is formed of an elastic portion integrally produced by pressing, machining, forging, casting, or the like on the plate-like member. Become. The elastic portion constitutes a cut-and-raised portion formed by being cut and raised by, for example, pressing. When electrical insulation is required between the tray 19 and the electronic components such as the power module 23, electrical insulation is performed.

  As shown in FIG. 5, the elastic piece 19 a includes a first bent portion 19 a 1 that is bent so as to protrude upward from the upper surface in FIG. 5 of the tray 19, and a lower surface in FIG. 5. And a second bent portion 19a2 that is bent so as to protrude downward. In FIG. 5, the first bent portion 19a1 on the flat surface portion 19p side (base side) of the tray 19 protrudes toward the cover-side tray holding portion 5b, and the second bent portion 19a2 on the tip side is the housing-side tray holding portion 9c. Protrusively toward. The first bent portion 19a1 may protrude toward the housing side tray holding portion 9c, and the second bent portion 19a2 at the tip side may protrude toward the cover side tray holding portion 5b.

  The elastic piece 19a indicated by a solid line in FIG. 5 is in a state of being elastically deformed by being sandwiched between the cover side tray holding portion 5b and the housing side tray holding portion 9c and being subjected to a force from the outside. On the other hand, the elastic piece 19a indicated by a two-dot chain line in FIG. 5 is in a natural state in which no force is applied from the outside.

  As shown in FIG. 1, the inverter housing portion 9 includes a protruding piece 9 d that protrudes inward from the peripheral end surface 9 b corresponding to the housing-side tray holding portion 9 c. Ten protruding pieces 9d are provided in total, two at each of the four corners and one at the longitudinal center. As shown in FIG. 5, the tip of the protruding piece 9 d is positioned in contact with the peripheral end surface of the tray 19. At this time, a slight gap as shown in FIG. 6 is formed between the peripheral end surface 9b of the portion where the protruding piece 9d is not formed and the peripheral end surface of the tray 19.

  Next, an operation for attaching the tray 19 included in the inverter module 17 to the housing body 1 will be described.

  As shown in FIG. 6, the tray 19 is set inside the peripheral end surface 9 b of the inverter housing portion 9. At this time, the tray 19 is supported on the housing side tray holding portion 9c of the inverter housing portion 9 by the six elastic pieces 19a. That is, as shown in FIG. 5, the second bent portion 19a2 of the elastic piece 19a comes into contact with the housing-side tray holding portion 9c, and the first bent portion 19a1 protrudes upward from the peripheral end surface 9b. .

  In this state, the inverter cover 5 is put on the inverter housing portion 9 so as to cover the inverter module 17. At that time, the cover-side tray holding portion 5b of the inverter cover 5 contacts the first bent portion 19a1 of the elastic piece 19a and presses it downward. The pressing force of the cover side tray holding portion 5b also acts on the second bent portion 19a2, and elastically deforms so that the entire elastic piece 19a is compressed.

  In a state where the elastic piece 19a is elastically deformed, the peripheral end surface 5a of the inverter cover 5 contacts and comes into close contact with the peripheral end surface 9b of the inverter housing part 9. In this state, the inverter cover 5 is fixed to the inverter housing portion 9 by bolts or welding not shown.

  As shown in FIGS. 2 and 5, in a state where the inverter cover 5 is fixed to the inverter housing part 9, the tray 19 is elastically deformed by the elastic piece 19 a and the inverter cover 5 and the inverter housing part 9 (housing main body 1) Elastically supported between. That is, the first bent portion 19a1 of the elastic piece 19a presses the cover side tray holding portion 5b of the inverter cover 5 by elastic reaction force, and the second bent portion 19a2 is the housing side tray of the inverter housing portion 9 by elastic reaction force. The holding part 9c is pressed.

  Thus, in this embodiment, the tray 19 included in the inverter module 17 is elastically supported between the inverter cover 5 and the inverter housing portion 9 by the six elastic pieces 19a.

  For this reason, the vibration of the motor 13 in the motor housing portion 7 and the vibration when the vehicle travels when the vehicle is mounted on the vehicle are absorbed by the six elastic pieces 19a, and the vibration transmission to the tray 19 is suppressed. As a result, the electronic components such as the power module 23 on the tray 19 are suppressed in vibration input, and adverse effects due to vibration are suppressed, which can contribute to improving the reliability of the electronic component and the connection portion by soldering of the electronic component.

  The work of attaching the tray 19 to the inverter housing part 9 is performed in conjunction with the work of fixing the inverter cover 5 to the inverter housing part 9. That is, when the tray 19 is attached to the inverter housing portion 9, no dedicated bolt is used alone. The number of parts is reduced by not using the dedicated bolts, and the bolt fastening work for fixing the tray 19 is not required, so that the number of assembling steps is reduced and the workability is improved.

The advantages of the electronic components constituting the inverter being modularized by the tray 19 to form the inverter module 17 are as follows.
(1) Electronic components in the inverter module 17 can be easily changed and replaced. At this time, it is not necessary to change the shape of the housing. It can contribute to cost reduction.
(2) At the time of maintenance for the inverter in the rotating electrical machine structure, the unit unit (inverter module 17) can be replaced, and the maintenance work becomes easy.
(3) The inverter module 17 can be used as a single inverter. In this case, one type of inverter module 17 can be applied to a plurality of devices, and convenience is improved.

  In the present embodiment, the elastic piece 19 a is constituted by an elastic portion integrated with the tray 19. For this reason, the number of parts is reduced and the assembling work is facilitated as compared with the case where the elastic member is a separate part from the tray 19.

  In the present embodiment, the elastic portion includes at least one elastic piece 19a formed by cutting and raising from the tray 19, and the elastic piece 19a is bent so as to protrude toward the inverter cover 5; And a second bent portion 19a2 that is bent so as to protrude toward the housing body 1 side. For this reason, the tray 19 can be elastically attached between the inverter cover 5 and the inverter housing part 9 by a simple configuration in which one elastic piece 19 a is provided.

  FIG. 7 shows another example corresponding to FIG. The elastic piece 19a of the tray 19A shown in FIG. 7 has two corners located at the longitudinal end of one long side of the tray 19A and one place located substantially in the longitudinal center of the other long side. There are three places in total. In other words, the elastic pieces 19a here are provided at three positions on the periphery of the tray 19 at positions corresponding to at least the apexes of the triangle.

  Corresponding to the three elastic pieces 19a, the cover side tray holding portion 5b shown in FIG. 4 and the housing side tray holding portion 9c shown in FIG.

  The example of FIG. 7 has a simpler configuration in which the elastic piece 19a, the cover-side tray holding portion 5b, and the housing-side tray holding portion 9c are provided only in three places compared to the examples of FIGS. The tray 19A can be elastically supported between the inverter cover 5 and the inverter housing portion 9.

  FIG. 8 shows an embodiment in which the tray 19B is provided with two elastic pieces 19b and 19c as elastic members instead of the one elastic piece 19a. In addition, the elastic pieces 19b and 19c shown in FIG. 8 have shown the example provided in the corner | angular part of the left front side in FIG. 1, FIG. Each of the elastic pieces 19b and 19c is an elastic portion that is integrally manufactured by pressing, machining, forging, casting, or the like on the plate-like member, like the elastic piece 19a of FIG. This elastic part constitutes a cut-and-raised part formed by, for example, pressing and working.

  One elastic piece 19b is provided with an upper bent portion 19b1 that is bent so that the tip end side protrudes toward the inverter cover 5, and the other elastic piece 19c is bent so that the tip end side protrudes toward the inverter housing portion 9 side. A lower bent portion 19c1 is provided. The elastic member provided with the two elastic pieces 19b and 19c is provided at six places as shown in FIG. 1 or three places as shown in FIG.

  8 and 8, the inverter cover 5 is fixed to the inverter housing portion 9 and the upper bent portion 19b1 of the elastic piece 19b is covered with the cover of the inverter cover 5 by the elastic reaction force as shown in FIGS. The side tray holding part 5b is pressed. The lower bent portion 19c1 of the elastic piece 19c presses the housing side tray holding portion 9c of the inverter housing portion 9 by an elastic reaction force.

  Therefore, also in the embodiment of FIG. 8, in a state where the inverter cover 5 is fixed to the inverter housing part 9, the tray 19B is elastically deformed between the inverter cover 5 and the inverter housing part 9 by the elastic pieces 19b and 19c. It is held elastically.

  Therefore, also in the embodiment of FIG. 8, the vibration of the motor 13 in the motor housing portion 7 and the vibration when the vehicle travels when mounted on the vehicle are absorbed by the elastic pieces 19b and 19c, and the vibration transmission to the tray 19B is suppressed. Is done. As a result, in the electronic components such as the power module 23 on the tray 19B, vibration input is suppressed, adverse effects due to vibration are suppressed, and it is possible to contribute to improving the reliability of the connection parts by soldering of the electronic components and the electronic components.

  As mentioned above, although embodiment of this invention was described, these embodiment is only the illustration described in order to make an understanding of this invention easy, and this invention is not limited to the said embodiment. The technical scope of the present invention is not limited to the specific technical matters disclosed in the above embodiment, but includes various modifications, changes, alternative techniques, and the like that can be easily derived therefrom.

  For example, the elastic pieces 19a are not limited to the six places as shown in FIGS. 1 and 6 or the three places as shown in FIG. 7, but may be at least three places as shown in FIG. Further, one place or two places may be added. The same applies to the elastic pieces 19b and 19c. In addition, the elastic piece may be arranged at two places on the long side portion or two places on the short side portion by making the length longer by providing three or more bent portions and forming a wave shape, etc. Good.

  The elastic piece 19a and the elastic pieces 19b and 19c may not be formed integrally with the tray, but may be manufactured as separate parts and attached to the tray. Furthermore, instead of the elastic piece 19a and the elastic pieces 19b and 19c, an elastic body such as a coil spring 29 or rubber as shown in FIG. 9 can be used. An elastic body such as a coil spring 29 or rubber is disposed between the tray 19C and the cover side tray holding portion 5b and between the tray 19C and the housing side tray holding portion 9c, and is compressed in the attached state. It becomes.

  Further, the present invention can be applied not only to an inverter as a power converter, but also to a DC-DC converter, for example, and the present invention can be applied to a generator as well as a motor as a rotating electrical machine.

1 Housing body (housing)
5 Inverter cover (lid member)
9a Opening of inverter housing (opening of power converter housing)
9b Peripheral end face of opening (periphery of opening)
11 Motor housing chamber (rotating electrical machine housing)
15 Inverter accommodation room (power converter accommodation part)
19, 19A, 19B, 19C Inverter module tray (mounting member)
19a, 19b, 19c Elastic piece (cut and raised part, elastic part, elastic member)
19a1 First bent portion of elastic piece 19a2 Second bent portion of elastic piece 21 Smoothing capacitor (power converter)
23 Power Module (Power Converter)
25 Driver board (power converter)
29 Coil spring (elastic member)

Claims (3)

A rotating electrical machine housing portion that houses the rotating electrical machine, and a housing that includes a power conversion device housing portion that houses the power conversion device, and
A mounting member that is disposed in the power converter housing portion of the housing and to which the power converter is mounted;
A lid member that closes the opening of the power converter housing and is fixed to the periphery of the opening;
An elastic member that elastically supports the attachment member between the lid member and the housing in a state in which the lid member is fixed to the periphery of the opening ;
The elastic member is composed of an elastic part integral with the mounting member,
The elastic portion includes at least one cut and raised portion formed by cutting and raising from the mounting member,
Said one cut and raised portions, characterized Rukoto that Yusuke a first bent portion which is bent so as to protrude to the lid member side, and a second bent portion that is bent so as to project into the housing side, the Rotating electrical machine structure.   2. The rotating electrical machine structure according to claim 1, wherein the elastic member is provided at three positions at least corresponding to the apex of the triangle on the periphery of the mounting member. A rotating electrical machine housing portion that houses the rotating electrical machine, and a housing that includes a power conversion device housing portion that houses the power conversion device, and
A mounting member that is disposed in the power converter housing portion of the housing and to which the power converter is mounted;
A lid member that closes the opening of the power converter housing and is fixed to the periphery of the opening;
An elastic member that elastically supports the attachment member between the lid member and the housing in a state in which the lid member is fixed to the periphery of the opening;
The rotating electrical machine structure according to claim 1, wherein the elastic member is provided at at least three positions corresponding to the apexes of the triangle on the periphery of the mounting member.

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