JP2019135126A - Power conversion device housing, housing of railway vehicle power conversion device, and power conversion device - Google Patents

Abstract

To provide a power conversion device housing and a housing of a railway vehicle power conversion device and a power conversion device in which damage on a power conversion device body and wiring of the power conversion device body accommodated in a housing body can be suppressed.SOLUTION: A power conversion device housing 100 comprises: a box-shaped housing body part 1 for storing a power conversion device body 200a; and a tabular reinforcement member 2 arranged on an inner surface 100a of the housing body part 1 so as to be adjacent to the device body 200a. The reinforcement member 2 comprises: a surface 2a to face the inner surface 100a; a surface 2c arranged almost orthogonally to the inner surface 100a of the housing body part 1; and a surface 2e bent toward the inside of the reinforcement member 2 from the surface 2c. The reinforcement member 2 includes a slit part 2g which is arranged in a bending portion 2f between the surfaces 2c and 2e and functions as a welding position for welding the reinforcement member 2 to the inner surface 100a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a casing for a power conversion device, a casing for a power conversion device for a railway vehicle, and a power conversion device, and particularly for a power conversion device in which an inner surface of a casing main body and a plate-like member are welded. The present invention relates to a casing, a casing of a railway vehicle power conversion device, and a power conversion device.

  Conventionally, a casing for a power conversion device in which an inner surface of a casing main body and a plate-like member are welded, a casing for a power conversion device for a railway vehicle, and a power conversion device are known (for example, Patent Documents). 1).

  A power unit portion (inverter device) used for a railway vehicle is accommodated in the housing for accommodating electrical equipment for a railway vehicle of Patent Document 1 described above. The casing is fixed in a state where it is suspended from the railcar by joining suspension ears provided on the casing with bolts. The casing is provided with a plate-like member for fixing the power unit portion arranged in the casing (covering the power unit portion). The plate member includes a rising portion (welded portion) formed by bending an end portion of the plate member. The rising portion is exposed inside the housing (the space in which the power unit portion is disposed).

  The rising portion is provided with a plurality of notches. In each of the plurality of notches, welding (fillet welding) between the rising portion and the inner surface of the housing is performed. Thereby, the plate-shaped member (rise part) and the inner surface of a housing | casing are joined. Each of the plurality of cutouts is provided with a weld bead (a raised portion formed at a welded portion) formed during welding.

JP2013-66900A

  However, in the conventional casing for a power converter as described in Patent Document 1, a portion used for joining (welding) (a rising portion in Patent Document 1) is exposed inside the casing. Therefore, there is an inconvenience that the weld bead exposed inside the housing becomes relatively large. In this case, the electrical components and wiring housed in the housing and the weld bead are likely to come into contact with each other, so that the electrical components and wiring housed in the housing are easily damaged.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to damage the power converter main body and the wiring of the power converter main body accommodated in the casing main body. It is providing the housing | casing for power converters which can suppress doing, the housing | casing of the power converter device for rail vehicles, and a power converter device.

  In order to achieve the above object, a housing for a power converter according to a first aspect of the present invention includes a box-shaped housing main body that houses a power converter main body, and an inner surface of the box-shaped housing main body. The plate-shaped reinforcing member is disposed so as to be adjacent to the power conversion device main body, and the plate-shaped reinforcing member includes a first surface provided to face the inner surface, and a first surface of the first surface. A second surface connected to the end and provided so as to be substantially orthogonal to the inner surface of the housing main body, and formed by bending the second surface toward the inner side of the reinforcing member. A welded portion for welding the inner surface of the housing body and the reinforcing member, which is provided at a bent portion between the third surface and the second surface and the third surface provided to contact the inner surface of the housing And a slit portion.

  In the case for the power conversion device according to the first aspect of the present invention, as described above, the third surface is bent toward the inside of the reinforcing member with respect to the second surface, and the second surface and the third surface. The slit part is provided in the bending part between the surfaces. If comprised in this way, when welding (fillet weld) is performed in a slit part, it will be the inner side (a 1st surface, a 2nd surface, a 3rd surface, and an inner surface of a reinforcement member via a slit part. A weld bead (a raised portion formed at a welded portion) can be formed in a space surrounded by the third surface, and the third surface is provided inside the reinforcement member. Therefore, the weld bead formed inside the reinforcement member Thus, the third surface and the inner surface can be joined (welded). Thereby, since at least a part of the weld bead is formed inside the reinforcing member, the size of the weld bead exposed inside the housing main body (outside the reinforcing member) can be made relatively small. As a result, it is possible to suppress damage to the power converter main body and the wiring of the power converter main body housed in the housing main body due to contact with the weld bead.

  Further, since the slit portion is provided in the bent portion, the reinforcing member can be bent with the slit portion as a mark, and thus the bending operation of the reinforcing member can be facilitated.

  In the power converter casing according to the first aspect, preferably, a part of the slit portion is provided on the third surface. If comprised in this way, since a weld bead is formed in the slit part provided in the 3rd surface bent inside the reinforcement member, it suppresses that a weld bead is formed in the outer side of a reinforcement member. Can do.

  In this case, preferably, the slit portion is provided so as to straddle the second surface and the third surface. If comprised in this way, while being able to penetrate | invade a welding bead inside a reinforcement member easily via the part provided in the 2nd surface of a slit part, a reinforcement member is interposed via a 2nd surface. A weld bead that has entered the inside can be formed in a slit provided in the third surface.

  In the case of the power converter housing provided so that the slit portion extends over the second surface and the third surface, preferably, the slit portion has a cross section L orthogonal to each of the second surface and the third surface. It has a letter shape. If comprised in this way, when a welding bead is made to penetrate | invade along the direction orthogonal to a 2nd surface via the slit part provided in the 2nd surface, it welds to the slit part provided in the 3rd surface. A bead can be easily formed.

  In the case for a power conversion device provided with the slit portion straddling the second surface and the third surface, preferably, the bent portion is provided on each of both end portions of the plate-like reinforcing member. A part of the slit portion provided in the bent portion on the one end side is provided on the third surface on the one end side, and a part of the slit portion provided on the bent portion on the other end side is the other It is provided on the third surface on the end side. If comprised in this way, it can suppress that a weld bead is formed in the outer side of a reinforcement member in each of the both ends of a plate-shaped reinforcement member.

  In the power converter housing according to the first aspect, preferably, at least a part of a weld bead formed when the inner surface of the housing body and the reinforcing member are welded is accommodated in the reinforcing member. Has been. If comprised in this way, since the magnitude | size of the weld bead exposed to the inside (outside of a reinforcement member) of a housing body part can be made small, it will be accommodated in a housing body part by contact with a weld bead. It is possible to easily prevent the power converter main body and the wiring of the power converter main body from being damaged.

  In the power converter housing according to the first aspect, preferably, a plurality of slit portions are provided along a direction orthogonal to a cross section orthogonal to each of the second surface and the third surface. If comprised in this way, a reinforcement member can be stably fixed to the inner surface of a housing body part compared with the case where only one slit part is provided. Furthermore, since it is suppressed that the weld bead formed in each of the plurality of slit portions is exposed to the inside of the housing main body portion (outside of the reinforcing member), a weld bead is formed in each of the plurality of slit portions. Even if formed, it is possible to suppress an increase in the amount (size) of the weld bead exposed inside the housing body (outside the reinforcing member).

  In the case of the power converter device according to the first aspect, preferably, the plurality of plate-like reinforcing members are arranged at the bottom of the case main body, and the wiring of the power converter main body is arranged at the bottom. And a plurality of plate-shaped reinforcing members. If comprised in this way, the wiring of a power converter device main body can be arrange | positioned using the space between the reinforcement members arrange | positioned at the bottom part of a housing | casing main-body part. As a result, it is possible to suppress an increase in the size of the housing body in order to secure a space for arranging the wiring. Moreover, since the size of the weld bead exposed inside the casing body (outside of the reinforcement member) is relatively small, the wiring provided between the reinforcement members arranged at the bottom and the weld bead Contact can be suppressed.

  A casing of a power converter for a railway vehicle according to a second aspect of the present invention is attached to the bottom of the railway vehicle, and includes a box-shaped casing main body that houses the power converter main body, and a box-shaped casing main body. A plate-shaped reinforcing member disposed on the inner surface of the first surface, the plate-shaped reinforcing member being connected to an end of the first surface and a first surface provided to face the inner surface, and a housing A second surface provided so as to be substantially orthogonal to the inner surface of the main body, and the second surface is formed by being bent toward the inner side of the reinforcing member so as to contact the inner surface of the housing main body. It includes a third surface provided, and a slit portion which is provided at a bent portion between the second surface and the third surface and serves as a welding location for welding the inner surface of the housing body and the reinforcing member.

  In the case of the railway vehicle power converter according to the second aspect of the present invention, as described above, the third surface is bent toward the inside of the reinforcing member with respect to the second surface, and the second surface A slit portion is provided at a bent portion between the first surface and the third surface. If comprised in this way, since at least one part of a weld bead is formed inside a reinforcement member, the magnitude | size of the weld bead exposed inside a housing body part (outside of a reinforcement member) is made comparatively small. be able to. As a result, it is possible to suppress damage to the power converter main body and the wiring of the power converter main body housed in the housing main body due to contact with the weld bead. Here, since the railway vehicle is relatively vibrated, contact between the weld bead exposed inside the main body of the casing and the wiring of the power converter main body and the power converter main body is relatively easy. Therefore, it is particularly effective in the housing of the railway vehicle power converter to relatively reduce the size of the weld bead exposed inside the housing body (outside the reinforcing member).

  A power conversion device according to a third aspect of the present invention includes a power conversion device main body, a box-shaped housing main body that houses the power conversion device main body, and power conversion on the inner surface of the box-shaped housing main body. A plate-like reinforcing member disposed adjacent to the apparatus main body, and the plate-like reinforcing member is connected to a first surface provided to face the inner surface and an end portion of the first surface. The second surface is provided so as to be substantially orthogonal to the inner surface of the housing main body, and is formed by being bent toward the inside of the reinforcing member with respect to the second surface, and contacts the inner surface of the housing main body. And a slit portion provided at a bent portion between the second surface and the third surface and serving as a welding location for welding the inner surface of the housing main body portion and the reinforcing member, including.

  In the power converter according to the third aspect of the present invention, as described above, the third surface is bent toward the inside of the reinforcing member with respect to the second surface, and the second surface and the third surface The slit part is provided in the bending part in between. If comprised in this way, since at least one part of a weld bead is formed inside a reinforcement member, the magnitude | size of the weld bead exposed inside a housing body part (outside of a reinforcement member) is made comparatively small. be able to. As a result, it is possible to suppress damage to the power converter main body and the wiring of the power converter main body housed in the housing main body due to contact with the weld bead. Thereby, it can suppress that operation | movement of a power converter device becomes abnormal resulting from damage to the wiring of a power converter device main body and a power converter device main body.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the wiring of the power converter device main body accommodated in the housing body part and the power converter device main body is damaged as described above.

It is the figure which showed the structure of the rail vehicle by which the housing | casing (power converter device) for power converters by one Embodiment is provided. It is the perspective view which showed the structure of the housing | casing (power converter device) for power converters by one Embodiment. FIG. 3 is a sectional view taken along line 300-300 in FIG. FIG. 4 is an enlarged view of FIG. 3. FIG. 3 is an enlarged view of FIG. 2 (the welding bead is not shown). FIG. 3 is a cross-sectional view taken along line 300-300 in FIG. 2. FIG. 7 is an enlarged view of FIG. 6. It is sectional drawing for demonstrating the structure of the reinforcement member by a comparative example. It is a schematic diagram for demonstrating arrangement | positioning of the power converter main body of the housing | casing for power converters (power converter device) by one Embodiment. It is a figure for demonstrating the method of forming the weld bead by one Embodiment.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

[This embodiment]
With reference to FIGS. 1-7, FIG. 9, and FIG. 10, the structure of the housing | casing 100 for power converters (power converter 200) by this embodiment is demonstrated.

(Configuration of high-speed railway vehicle)
First, with reference to FIG. 1, the structure of the high-speed rail vehicle 10 in which the power converter housing 100 (power converter 200) is installed will be described. In the present embodiment, the case where the high-speed rail vehicle 10 travels in the X1 direction in the traveling direction (X direction) will be described. Moreover, let the X1 direction where the high-speed rail vehicle 10 advances among the advancing directions be the front of the advancing direction, and let the X2 direction opposite to the front be the aft of the advancing direction. The power conversion device casing 100 and the high-speed railway vehicle 10 are examples of the “railway vehicle power conversion device casing” and the “railway vehicle” in the claims, respectively.

  The high-speed rail vehicle 10 is a high-speed rail vehicle that travels at, for example, 180 km / h or more in a state where a plurality of vehicles are organized. As shown in FIG. 1, the high-speed rail vehicle 10 is configured to travel with electric power supplied from an overhead line 20 serving as an AC power source.

  The high-speed rail vehicle 10 includes a vehicle body 11, a pantograph 12, a power converter casing 100 (power converter 200), an electric device 13 such as an induction motor (not shown) and an air conditioner (not shown). It has. The high-speed rail vehicle 10 travels on the rail 101. In addition, the power conversion device 200 includes a power conversion device main body 200a (see FIG. 9) that includes an inverter, a transformer, a contactor, a fuse, and the like.

  The pantograph 12 has a role of receiving power from the overhead line 20. The power converter 200 converts the AC voltage from the pantograph 12 transformed by a transformer (not shown) into a desired three-phase AC voltage and frequency. The three-phase AC voltage and frequency are output to the induction motor of the electric device 13.

  As shown in FIG. 2, the power conversion device casing 100 (power conversion device 200) is attached in the state of being hung from the bottom 11 a (see FIG. 1) of the vehicle body 11 of the high-speed railway vehicle 10. The housing body 1 is provided. That is, the housing body 1 is attached below (in the Z2 direction) the bottom 11a of the vehicle body 11 of the high-speed railway vehicle 10.

  The housing main body 1 houses the power conversion device main body 200a (see FIG. 9). An opening 1 a is provided on the front side (X1 direction side) of the housing body 1. A frame 1b is provided on the periphery of the opening 1a so as to surround the opening 1a. A mounting bracket 1 c for attaching to the bottom 11 a of the vehicle body 11 of the high-speed railway vehicle 10 is provided at the end of the housing body 1 on the Z1 direction side. The mounting bracket 1c is provided at each of the four corners of the housing body 1 as viewed from the Z1 direction side. In FIG. 2, the power converter main body 200a is not shown for the sake of simplicity.

  Moreover, the power converter housing 100 (power converter 200) is disposed on the inner surface 100a of the box-shaped housing body 1 so as to be adjacent to the power converter body 200a (see FIG. 9). A plate-shaped reinforcing member 2 is provided. Specifically, a plurality of (three in the present embodiment) plate-like reinforcing members 2 are provided on the bottom 100b (the inner surface 100a on the Z2 direction side) of the housing body 1. The reinforcing member 2 is also provided on each of the inner surfaces 100a on the Y1 direction side, the Y2 direction side, the X2 direction side, and the Z1 direction side. Note that the inner surface 100a and the reinforcing member 2 of the housing main body 1 are formed of sheet metal.

  As shown in FIG. 3, the reinforcing member 2 includes a surface 2a provided to face the inner surface 100a. The surface 2a is provided substantially parallel to the inner surface 100a and is separated from the inner surface 100a by a distance D1. In FIG. 3, a welding bead 3 described later is omitted for simplification. The surface 2a is an example of the “first surface” in the claims.

  The reinforcing member 2 includes a surface 2c connected to the end 2b of the surface 2a. The surface 2c is provided so as to be substantially orthogonal to the inner surface 100a of the housing body 1. That is, the reinforcing member 2 is bent at a right angle at a bent portion 2d between the surface 2a (the end 2b of the surface 2a) and the surface 2c. The surface 2c is an example of the “second surface” in the claims.

  Further, the surface 2c is connected to both end portions 2b (Y1 direction side and Y2 direction side) of the surface 2a. The surface 2c on the Y1 direction side and the surface 2c on the Y2 direction side are provided so as to face each other.

  The reinforcing member 2 includes a surface 2e formed by being bent toward the inside of the reinforcing member 2 with respect to the surface 2c. That is, the surface 2e on the Y1 direction side is bent from the surface 2c on the Y1 direction side to the Y2 direction side. The surface 2e on the Y2 direction side is bent from the surface 2c on the Y2 direction side to the Y1 direction side. The reinforcing member 2 is bent at a right angle at a bent portion 2f between the surface 2c and the surface 2e. The surface 2e is an example of the “third surface” in the claims.

  Further, the surface 2e is provided so as to contact the inner surface 100a of the housing body 1. Specifically, the surface 2 e is provided so that the entire surface 2 e is in close contact with the inner surface 100 a of the housing body 1.

  As described above, the reinforcing member 2 is bent by the bent portion 2d and the bent portion 2f on the end portion 2h side of both the reinforcing members 2 (Y1 direction side and Y2 direction side), whereby the surfaces 2c and 2e are formed. Each cross section (cross section shown in FIG. 3) orthogonal to each has a C-shape. That is, the reinforcing member 2 has a so-called C channel type reinforcing structure. The reinforcing member 2 is bent by a bending process by a bender (a machine for bending a flat plate to form a three-dimensional shape). The reinforcing member 2 is deformed into a C channel type by bending the bending process four times by a bender.

  Here, in this embodiment, the reinforcing member 2 includes a slit portion 2g provided in a bent portion 2f between the surface 2c and the surface 2e. The slit portion 2g serves as a welding location for welding (intermittent fillet welding) the inner surface 100a of the housing main body portion 1 and the reinforcing member 2. Specifically, a droplet or the like is configured to pass through the slit portion 2g from the outside of the reinforcing member 2 to the inside (the space surrounded by the surfaces 2a, 2c, 2e, and the inner surface 100a). Yes. The slit portion 2g is formed by a punching process using a turret punch (a machine that presses and punches a sheet metal).

  Moreover, in this embodiment, a part of slit part 2g is provided in the surface 2e. Specifically, the length in the Y direction of the slit 2g provided on the surface 2e is a length L1 (see FIG. 4). The length L1 is smaller than the length L2 (see FIG. 4) in the Y direction of the surface 2e. Note that the length L2 is smaller than the distance D1.

  Moreover, in this embodiment, the slit part 2g is provided so that the surface 2c and the surface 2e may be straddled. That is, in the slit portion 2g, a cross section (cross section shown in FIG. 3) orthogonal to each of the surface 2c and the surface 2e has an L shape. The length in the Z direction of the slit portion 2g provided on the surface 2c is a length L3 (see FIG. 4). The length L3 is substantially the same size as the length L1 of the slit portion 2g of the surface 2e.

  In the present embodiment, a part of the slit portion 2g provided in the bent portion 2f on the one end 2h side (Y1 direction side) is on the surface 2e on the one end 2h side (Y1 direction side). Is provided. In addition, a part of the slit portion 2g provided in the bent portion 2f on the other end 2h side (Y2 direction side) is provided on the surface 2e on the other end 2h side (Y2 direction side).

  Specifically, the slit 2g provided in the bent portion 2f on the one end 2h side (Y1 direction side) straddles the surface 2c and the surface 2e on the one end 2h side (Y1 direction side). Yes. The slit 2g provided in the bent portion 2f on the other end 2h side (Y2 direction side) straddles the surface 2c and the surface 2e on the other end 2h side (Y2 direction side).

  As shown in FIG. 5, each of the surface 2a, the surface 2c, and the surface 2e has a substantially rectangular shape. The long sides of the surface 2a, the surface 2c, and the surface 2e are provided so as to extend along the X direction. When the surface 2c is viewed from the front (viewed from the Y direction), the slit portion 2g (provided on the surface 2c) has a substantially rectangular shape. The long side of the slit portion 2g (provided on the surface 2c) is provided so as to extend along the X direction. When the surface 2e is viewed from the front (viewed from the Z direction), the slit portion 2g (provided on the surface 2e) has a substantially rectangular shape. The long side of the slit portion 2g (provided on the surface 2e) is provided so as to extend along the X direction. The length of the slit portion 2g in the X direction is a length L4 that is larger than the length L1 and the length L3 (see FIG. 4). By adjusting the size of the length L4, it is possible to easily form the slit portion 2g corresponding to the size of the weld bead 3 (see FIG. 6) described later. In FIG. 5, the weld bead 3 is not shown for simplicity.

  Here, in this embodiment, the slit part 2g is provided with two or more along the direction (X direction) orthogonal to the cross section (cross section of FIG. 3) orthogonal to each of the surface 2c and the surface 2e. Specifically, the plurality of slit portions 2g are provided at an equal pitch (length L5) along the X direction.

  As shown in FIGS. 6 and 7, the weld bead 3 formed when welding the inner surface 100a of the housing body 1 and the reinforcing member 2 is disposed so as to be embedded in the slit 2g. The length L4 (see FIG. 5) in the X direction of the slit portion 2g is determined based on the size (in the X direction) of the weld bead 3. Note that the size of the weld bead 3 is determined based on the diameter φ of the cylindrical welding rod 4a (see FIG. 10) attached to the welding machine 4 (see FIG. 10) used in welding. That is, by changing the diameter φ of the welding rod 4a, it is possible to increase the area (covering area) of the welded portion by the weld bead 3. The welding rod 4a is not limited to a cylindrical shape, and may be a prismatic shape.

  Here, in this embodiment, a part of the weld bead 3 is accommodated in the reinforcing member 2. Specifically, as shown in FIG. 6, the weld bead 3 is formed so as to straddle the slit 2g (see FIGS. 3 and 4) provided on the surface 2e and the surface 2e.

  Note that the remaining part of the weld bead 3 protrudes to the outside of the reinforcing member 2, and this protrusion length is, for example, the length L1 in the Y direction of the slit portion 2g provided on the surface 2e (FIG. 4). It is sufficiently small compared to (see).

  The length in the Y direction of the reinforcing member 2 including the weld bead 3 is a length L6 that is the sum of the length L5 that is the length of the surface 2a in the Y direction and the protruding length of the weld bead 3.

  Here, FIG. 8 shows a configuration of the reinforcing member 22 (comparative example) in which the surface 22e is bent to the outside of the reinforcing member 22 with respect to the surface 2c, and the weld bead 23 is provided in the vicinity of the end 22h. The length L7 of the reinforcing member 22 in the Y direction is the sum of the length L5 of the surface 2a in the Y direction and twice the length L8 of the surface 22e in the Y direction. The length L8 is substantially the same size as the length L1 (see FIG. 4). Thus, in the present embodiment, the length L6 (see FIG. 6) of the reinforcing member 2 in the Y direction can be made relatively smaller than the length L7 of the reinforcing member 22 of the comparative example in the Y direction. It is.

  Thereby, when the power converter main body 200a (see FIG. 9) and the wiring 200b of the power converter main body 200a (see FIG. 9) are arranged adjacent to the reinforcing member 2, the power converter main body 200a and the power conversion It is possible to further increase the space in which the wiring 200b of the apparatus main body 200a is arranged. As a result, the contact between the power conversion device main body 200a and the wiring 200b of the power conversion device main body 200a and the reinforcing member 2 can be suppressed, and the housing main body 1 can be downsized. .

  Moreover, since the surface 2e is provided inside the reinforcing member 2, the power conversion device main body 200a, the wiring 200b of the power conversion device main body 200a, and the surface 2e (a step between the surface 2e and the inner surface 100a) are provided. It is possible to prevent contact. Thereby, compared with the structure of a comparative example, it is possible to suppress damage to the power converter main body 200a and the wiring 200b of the power converter main body 200a.

  Moreover, in this embodiment, as shown in FIG. 9, the wiring 200b of the power converter main body 200a is provided between the plurality of reinforcing members 2 arranged on the bottom 100b. Further, the wiring 200 b is also provided between the reinforcing member 2 and the inner surface 100 a of the housing body 1. A part of the power conversion device main body 200a is also provided between the plurality of reinforcing members 2 and between the reinforcing member 2 and the inner surface 100a. In addition, a part of the power conversion device main body 200 a is disposed so as to be supported by the surface 2 a of the reinforcing member 2 inside the housing main body 1. Note that FIG. 9 is a schematic diagram, and members unnecessary for description are not shown for simplicity. Moreover, arrangement | positioning of the power converter main body 200a and the wiring 200b is not restricted to this.

  In addition, cooling fins 103 are provided on the inner surface 100a (on the Y1 direction side) of the housing body 1. The cooling fin 103 is provided between the reinforcing member 2 and the inner surface 100a (on the Z1 direction side).

(Method for forming weld bead)
With reference to FIG. 10, the formation method of the weld bead 3 is demonstrated. A welder 4 is used to form the weld bead 3. A welding rod 4 a is attached to the end of the welding machine 4. By melting the welding rod 4a of the welding machine 4, the droplet of the welding rod 4a enters the inside of the reinforcing member 2 through the slit portion 2g (see FIG. 4). And the welding bead 3 is formed in the slit part 2g of the surface 2e by solidifying the droplet of the welding rod 4a which penetrate | invaded inside the reinforcement member 2. As shown in FIG. Thereby, the reinforcing member 2 (surface 2e) and the inner surface 100a of the housing body 1 are joined (welded).

  Moreover, since the slit part 2g is a welding location in the reinforcing member 2, an operator can perform the welding operation based on the size of the slit part 2g while using the slit part 2g as a mark. Thereby, in the welding operation, it is possible to omit the trouble of confirming the design value of the size of the welding location and the weld bead 3 with a design drawing or the like, so that the welding operation can be simplified. Further, since welding is performed based on the position and size of the slit portion 2g, it is possible to suppress variation in the welding operation method for each operator. As a result, it is possible to reduce manufacturing errors of the power conversion device casing 100 (power conversion device 200).

(Effect of this embodiment)
In the present embodiment, the following effects can be obtained.

  In the present embodiment, as described above, the plate-like reinforcing member 2 is connected to the surface 2a provided to face the inner surface 100a and the end 2b of the surface 2a, and the inner surface of the housing body 1 A surface 2c provided so as to be substantially orthogonal to 100a, and a surface formed so as to be bent toward the inside of the reinforcing member 2 with respect to the surface 2c and to be in contact with the inner surface 100a of the housing body 1 2e is included. And the reinforcing member 2 is provided in the bending part 2f between the surface 2c and the surface 2e, and the slit part 2g used as the welding location for welding the inner surface 100a of the housing body part 1 and the reinforcing member 2 is provided. The power conversion device casing 100 (power conversion device 200) is configured to include the power conversion device. Thereby, when welding (fillet weld) is performed in the slit portion 2g, the space surrounded by the inner side (surface 2a, surface 2c, surface 2e, and inner surface 100a of the reinforcing member 2 through the slit portion 2g. ), A weld bead 3 (a raised portion formed at a welded portion) can be formed, and the surface 2e is provided inside the reinforcing member 2, so that the weld bead 3 formed inside the reinforcing member 2 is provided. Thus, the surface 2e and the inner surface 100a can be joined (welded). As a result, since at least a part of the weld bead 3 is formed inside the reinforcing member 2, the size of the weld bead 3 exposed inside the housing body 1 (outside the reinforcing member 2) is relatively small. can do. Thereby, it can suppress that the wiring 200b of the power converter device main body 200a accommodated in the housing body part 1 and the power converter device main body 200a is damaged by the contact with the weld bead 3. Moreover, it can suppress that operation | movement of the power converter device 200 becomes abnormal resulting from damage to the wiring 200b of the power converter device main body 200a and the power converter device main body 200a.

  Here, since the railway vehicle is relatively vibrated, the contact between the weld bead 3 exposed inside the casing body 1 and the power converter main body 200a and the wiring 200b of the power converter main body 200a is compared. Easy to happen. Therefore, relatively reducing the size of the weld bead 3 exposed inside the housing body 1 is particularly important in the power converter housing 100 (power converter 200) provided in the high-speed railway vehicle 10. It is valid.

  Further, since the slit portion 2g is provided in the bent portion 2f, the reinforcing member 2 can be bent using the slit portion 2g as a mark, so that the bending operation of the reinforcing member 2 can be facilitated.

  In the present embodiment, as described above, the power conversion device casing 100 (power conversion device 200) is configured such that a part of the slit portion 2g is provided on the surface 2e. Thereby, since the weld bead 3 is formed in the slit part 2g provided in the surface 2e bent inside the reinforcement member 2, it suppresses that the weld bead 3 is formed in the outer side of the reinforcement member 2. Can do.

  Further, in the present embodiment, as described above, the power conversion device casing 100 (power conversion device 200) is configured such that the slit portion 2g is provided across the surface 2c and the surface 2e. Thereby, the weld bead 3 can be easily penetrated into the inside of the reinforcing member 2 through the portion of the slit portion 2g provided on the surface 2c, and at the inside of the reinforcing member 2 through the surface 2c. The weld bead 3 that has entered can be formed in the slit portion 2g provided in the surface 2e.

  Further, in the present embodiment, as described above, the slit portion 2g has a L-shaped cross section orthogonal to each of the surface 2c and the surface 2e (power converter device 200). Configure. Thereby, when the weld bead 3 is penetrated along the direction orthogonal to the surface 2c via the slit portion 2g provided on the surface 2c, the weld bead 3 is easily inserted into the slit portion 2g provided on the surface 2e. Can be formed.

  In the present embodiment, as described above, a part of the slit portion 2g provided in the bent portion 2f on the one end 2h side is provided on the surface 2e on the one end 2h side, and the other The power conversion device casing 100 (power conversion device 200) is configured such that a part of the slit portion 2g provided in the bent portion 2f on the end 2h side is provided on the other surface 2e. Thereby, it can suppress that the weld bead 3 is formed in the outer side of the reinforcement member 2 in each of the both ends 2h side of the plate-shaped reinforcement member 2. FIG.

  In the present embodiment, as described above, a part of the weld bead 3 formed when the inner surface 100 a of the housing body 1 and the reinforcing member 2 are welded is accommodated in the reinforcing member 2. As described above, the power conversion device casing 100 (power conversion device 200) is configured. As a result, the size of the weld bead 3 exposed to the inside of the housing main body 1 (outside of the reinforcing member 2) can be reduced, so that it is accommodated in the housing main body 1 by contact with the weld bead 3. Damage to the power converter main body 200a and the wiring 200b of the power converter main body 200a can be easily suppressed.

  Further, in the present embodiment, as described above, the power converter case 100 (power) is provided so that a plurality of the slit portions 2g are provided along a direction orthogonal to a cross section orthogonal to each of the surface 2c and the surface 2e. The conversion device 200) is configured. Thereby, compared with the case where only one slit part 2g is provided, the reinforcing member 2 can be stably fixed to the inner surface 100a of the housing body part 1. Furthermore, since it is suppressed that the weld bead 3 formed in each of the plurality of slit portions 2g is exposed to the inside of the housing main body portion 1 (outside of the reinforcing member 2), the plurality of slit portions 2g Even if the weld beads 3 are respectively formed, it is possible to suppress an increase in the amount (size) of the weld beads 3 exposed to the inside of the casing body 1 (outside of the reinforcing member 2).

  In the present embodiment, as described above, the wiring 200b of the power conversion device main body 200a is provided between the plurality of plate-shaped reinforcing members 2 disposed on the bottom 100b, so that the power conversion device housing is provided. The body 100 (power converter 200) is comprised. Thereby, the wiring 200b of the power converter main body 200a can be arranged using the space between the reinforcing members 2 arranged on the bottom 100b of the housing main body 1. As a result, it is possible to suppress an increase in the size of the housing body 1 in order to secure a space for arranging the wiring 200b. In addition, since the size of the weld bead 3 exposed inside the casing body 1 (outside of the reinforcing member 2) is relatively small, the wiring provided between the reinforcing members 2 arranged on the bottom 100b. Contact between 200b and the weld bead 3 can be suppressed.

[Modification]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the said embodiment, although the 3rd surface bent by the inner side of a reinforcement member was shown in the both ends part side of a reinforcement member, this invention is not limited to this. For example, the third surface may be provided only on one end side of the reinforcing member.

  Moreover, in the said embodiment, although a part of welding bead showed the example accommodated in the inside of a reinforcement member, this invention is not limited to this. For example, the entire weld bead may be accommodated inside the reinforcing member.

  Moreover, in the said embodiment, although the case where the housing | casing for power converters and a power converter are provided in a rail vehicle (high-speed rail vehicle 10) were shown, this invention is not limited to this. For example, the casing for the power conversion device and the power conversion device may be provided in a device other than the railway vehicle.

  Moreover, in the said embodiment, although the slit part showed the example which has substantially rectangular shape, this invention is not limited to this. For example, the slit part may have a square shape or a circular shape.

  Moreover, in the said embodiment, although the slit part showed the example in which the cross section orthogonal to each of the 2nd surface (surface 2c) and each of the 3rd surface (surface 2e) has L-shape, this invention It is not limited to this. For example, the slit portion may have an L-shaped cross section that is orthogonal to the second surface (surface 2c) and intersects the third surface (surface 2e) without being orthogonal. In addition, the slit portion may have an L-shaped cross section that is orthogonal to the third surface (surface 2e) and intersects the second surface (surface 2c) without being orthogonal.

  In the above embodiment, the example in which the slit portion is provided only in the bent portion (2f) between the second surface (surface 2c) and the third surface (surface 2e) is shown. Not limited to. For example, you may provide also in the bending part (2d) between the 1st surface (surface 2a) and the 2nd surface (surface 2c).

  Moreover, in the said embodiment, although the reinforcement member was shape | molded with the sheet metal similarly to the housing body part, this invention is not limited to this. For example, the reinforcing member may be formed of a dedicated member that is different from the housing body.

  Moreover, in the said embodiment, the length (L3) of the slit part 2g provided in the 2nd surface (surface 2c), and the length (L1) of the slit part 2g provided in the 3rd surface (surface 2e). However, the present invention is not limited to this. For example, the length (L1) of the slit portion 2g provided on the third surface (surface 2e) is longer than the length (L3) of the slit portion 2g provided on the second surface (surface 2c). It may be large (small).

  Moreover, in the said embodiment, the length (L2) in the Y direction of a 3rd surface (surface 2e) is an example smaller than the separation distance (D1) between the 1st surface (surface 2a) and the inner surface 100a. Although shown, the present invention is not limited to this. The length (L2) in the Y direction of the third surface (surface 2e) may be equal to or greater than the separation distance (D1) between the first surface (surface 2a) and the inner surface 100a.

DESCRIPTION OF SYMBOLS 1 Housing | casing main-body part 2 Reinforcement member 2a surface (1st surface)
2b end (end of first surface)
2c surface (2nd surface)
2e surface (third surface)
2f Bending part 2g Slit part 2h End part (end part of reinforcing member)
3 Weld beads 10 High-speed rail vehicles (railroad vehicles)
11a Bottom (bottom of railcar)
100 Power converter housing (Railway power converter housing)
100a Inner surface (inner surface of the casing body)
100b Bottom (bottom of the main body)
200 Power Converter 200a Power Converter Body 200b Wiring

Claims (10)

A box-shaped housing main body for storing the power converter main body;
On the inner surface of the box-shaped housing main body, a plate-shaped reinforcing member disposed so as to be adjacent to the power conversion device main body, and
The plate-like reinforcing member is connected to the first surface provided to face the inner surface and an end portion of the first surface, and is provided so as to be substantially orthogonal to the inner surface of the housing body. A second surface, a third surface that is formed by being bent toward the inside of the reinforcing member with respect to the second surface, and is provided so as to contact the inner surface of the housing main body, A power conversion device including a slit portion provided at a bent portion between the second surface and the third surface and serving as a welding location for welding the inner surface of the housing main body portion and the reinforcing member. Enclosure.   The casing for a power conversion device according to claim 1, wherein a part of the slit portion is provided on the third surface.   The casing for a power converter according to claim 2, wherein the slit portion is provided so as to straddle the second surface and the third surface.   The said slit part is a housing | casing for power converters of Claim 3 in which the cross section orthogonal to each of the said 2nd surface and the said 3rd surface has an L-shape. The bent portion is provided on each of both end portions of the plate-like reinforcing member,
A part of the slit portion provided in the bent portion on one end side is provided on the third surface on the one end side, and a part of the slit portion provided on the bent portion on the other end side. 5. The power conversion device housing according to claim 2, wherein the portion is provided on the third surface on the other end side.   At least one part of the weld bead formed when the said inner surface of the said housing | casing main-body part and the said reinforcement member are welded is accommodated in the inside of the said reinforcement member. The casing for a power conversion device according to the item.   The said slit part is provided with two or more along the direction orthogonal to the cross section orthogonal to each of the said 2nd surface and each said 3rd surface, The power converter device of any one of Claims 1-6. Enclosure. The plurality of plate-like reinforcing members are disposed at the bottom of the housing main body,
The wiring for the power conversion device main body is provided between the plurality of plate-like reinforcing members disposed on the bottom portion, and the housing for the power conversion device according to any one of claims 1 to 7. body. A box-shaped housing main body that is attached to the bottom of the railway vehicle and houses the power conversion device main body;
A plate-shaped reinforcing member disposed on the inner surface of the box-shaped housing body,
The plate-like reinforcing member is connected to the first surface provided to face the inner surface and an end portion of the first surface, and is provided so as to be substantially orthogonal to the inner surface of the housing body. A second surface, a third surface that is formed by being bent toward the inside of the reinforcing member with respect to the second surface, and is provided so as to contact the inner surface of the housing main body, A rail vehicle that includes a slit portion that is provided at a bent portion between the second surface and the third surface and serves as a welding portion for welding the inner surface of the housing main body portion and the reinforcing member. The housing of the power converter. A power converter main body,
A box-shaped housing main body for storing the power converter main body;
On the inner surface of the box-shaped housing main body, a plate-shaped reinforcing member disposed so as to be adjacent to the power conversion device main body, and
The plate-like reinforcing member is connected to the first surface provided to face the inner surface and an end portion of the first surface, and is provided so as to be substantially orthogonal to the inner surface of the housing body. A second surface, a third surface that is formed by being bent toward the inside of the reinforcing member with respect to the second surface, and is provided so as to contact the inner surface of the housing main body, A power conversion device including a slit portion provided at a bent portion between the second surface and the third surface and serving as a welding location for welding the inner surface of the housing main body portion and the reinforcing member. .

Images