JP2018177182A - Protection structure for high-voltage unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protection structure for a high-voltage unit, which may protect high-voltage parts in a unit case without enlarging a guard member.SOLUTION: A high-voltage unit comprises a unit case 10 for storing high-voltage parts in its inner section. The high-voltage unit is mounted between right and left vehicular side frames. At least a part of side surfaces 10Ms, 10Ls of the unit case 10 at outside in vehicle width direction is arranged to face side surfaces of the side frames at inside in vehicle width direction. In a region surrounded by a plurality of seat surfaces provided on a side surface of the unit case 10 at outside in vehicle width direction and a plurality of seat surfaces of the side surfaces 10Ms, 10Ls, a protection structure has a flat section which projects to outside in vehicle width direction rather than the other parts in the region and a plate guard member 11 which is fastened onto the plurality of seat surfaces and faces the flat section with a predetermined gap interposed therebetween.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a protective structure of a high voltage electrical unit of a vehicle.

  In a vehicle such as an electric car, a rotating electrical machine for driving the vehicle and regenerative power generation and a power control unit for controlling the rotating electrical machine are accommodated in a motor room at the front of the vehicle body. In the power control unit, high voltage electrical components such as an inverter and a DC-DC converter are accommodated in a metal unit case. Therefore, in the power control unit of this type of vehicle, it is important that the high voltage electrical components in the unit case be sufficiently protected even when a large load is externally input to the vehicle. Under these circumstances, various measures have been devised to sufficiently protect high-voltage electrical components even when a large load is input from the outside (see, for example, Patent Document 1).

  In the protection structure of the high voltage electrical unit described in Patent Document 1, the unit case is attached to the vehicle body frame by the unit support frame, and in that state, the peripheral area of the unit case is surrounded and protected by the unit support frame. Further, a guard member for protecting the unit case from the protrusion is provided at a portion facing the protrusion of the radiator in front of the vehicle. The guard member is made of a metal plate-like member, and is mounted across the unit support frame and the high strength portion on the unit case.

JP, 2013-103585, A

  The protection structure of the high-voltage electrical unit described in Patent Document 1 has a structure in which the unit case is attached to the vehicle body frame by a large unit support frame, so that a wide range of the peripheral region of the unit case is protected by the unit support frame it can. However, depending on the vehicle, such a large unit support frame may not be adopted.

Further, as described in Patent Document 1, when arranging a plate-like guard member so as to cover the surface to be protected of the unit case, the deformation behavior of the contact portion of the vehicle body structure is simple and stable. For example, high voltage electrical components in the unit case can be protected.
However, for example, when the side frame of the vehicle body is displaced so as to approach from the oblique direction toward the side surface of the unit case with bending deformation when a collision load is input, the load from the side frame on the side surface of the unit case There is a wide range of variation in input position, and as a result, the guard member covering the side of the unit case has to be upsized. And if a guard member is enlarged, it will become a cause which causes the increase in vehicle weight, and the soaring of product cost.

  Then, this invention tends to provide the protection structure of the high voltage | pressure electrical-wielding unit which can protect the high voltage | pressure electrical component in a unit case, without causing the enlargement of a guard member.

The protective structure of the high voltage electrical unit according to the present invention adopts the following means in order to solve the above problems.
That is, the protective structure of the high voltage electrical unit according to the present invention has a unit case (for example, the unit case 10 of the embodiment) for housing the high voltage electrical component (for example, the high voltage electrical component 8 of the embodiment) inside. While mounted between the left and right side frames (for example, side frames 3L and 3R in the embodiment), at least a part of side surfaces (for example, side surfaces 10Ms and 10Ls in the embodiment) of the unit width direction outer side of the unit case A protective structure for a high voltage electrical unit disposed so as to face the side surface on the inner side in the vehicle width direction of the side frame, and a plurality of seat surfaces provided on the side surface on the outer side in the vehicle width direction of the unit case , In the area surrounded by the end face 12a) of the embodiment and the plurality of the seat surfaces of the side surface, protruding outward in the vehicle width direction with respect to other parts in the area While being fixed to the flat part (for example, flat parts 16A and 16B of an embodiment) provided with two or more and the above-mentioned seat surface, a predetermined crevice (for example, crevice d of an embodiment) is provided in the flat part. It has a plate-like guard member (for example, guard member 11 of an embodiment) which counters, It is characterized by the above-mentioned.

  With the above configuration, when the bent portion of the side frame is displaced so as to approach from the oblique direction with respect to the side surface of the unit case on the outer side in the vehicle width direction at the time of a collision, the bent portion of the side frame contacts the plate-like guard member, The load is received by the seat surface of the unit case via the guard member. At this time, when the displacement in the oblique direction of the bent portion of the side frame further progresses, the region surrounded by the plurality of seat surfaces of the guard member is deformed in the side direction of the unit case, and the back surface of the guard member is the side surface of the unit case. Contact the flat part. The input load from the side frame is received by the plurality of seat surfaces and flat portions on the side surface of the unit case.

The unit case includes a flange portion (e.g., an embodiment) in which an upper case (e.g., the intermediate case 10M of the embodiment) and a lower case (e.g., the lower case 10L of the embodiment) extend outward in the vehicle width direction The flange portions 30 and 31) may be mutually fastened and fixed, and at least a part of the flat portion may be formed on the side surface of the flange portion on the outer side in the vehicle width direction.
In this case, since at least a part of the flat portion is formed as a rigid flange portion, it is possible to receive the load input from the bent portion of the side frame to the flat portion with high rigidity of the flange portion.

The guard member is provided at a flat receiving portion (for example, the receiving portion 24A of the embodiment) facing the flat portion and at a rear end of the receiving portion, and a bulging portion (for example, bulging outward in the vehicle width direction) , And the outward bending portion 21) of the embodiment.
In this case, when the bent portion of the side frame is displaced in a direction approaching the unit frame at the time of a collision, the bent portion abuts on the receiving portion of the guard member to deform the receiving portion toward the unit case. When the bent portion of the side frame is further displaced, the receiving portion abuts on the flat portion of the unit case, and the bent portion of the side frame also abuts on the bulging portion of the guard member. At this time, the side frame is restricted in its displacement toward the rear of the vehicle body by the bulging portion. Therefore, when this configuration is adopted, it is possible to suppress the bent portion of the side frame from coming out of the guard member and coming into direct contact with the unit case.

The guard member may be formed with a slit (for example, the slit 20 of the embodiment) extending from the periphery of the guard member toward the inner region.
In this case, when the bent portion of the side frame abuts on the guard member at the time of a collision, the inner region of the guard member is deformed in the direction approaching the flat portion of the side surface of the unit case triggered by the deformation of the vicinity of the slit. Thereby, the displacement of the bent portion of the side frame is easily restrained by the deformation region of the guard member.

The guard member is provided at a flat receiving portion (for example, the receiving portion 24A of the embodiment) facing the flat portion and at a rear end of the receiving portion, and a bulging portion (for example, bulging outward in the vehicle width direction) The outward bending portion 21) of the embodiment may be provided, and the slit may be configured to straddle the receiving portion and the bulging portion in the front-rear direction and be opened at a rear end edge of the guard member.
In this case, when the bent portion of the side frame abuts on the receiving portion of the guard member at the time of a collision, the receiving portion is deformed in the direction of the unit case triggered by the deformation of the vicinity of the slit. In this configuration, the slit straddles the receiving portion and the bulging portion and is open at the rear end edge of the guard member, so that excessive displacement of the bent portion of the side frame to the rear side is required. While being restricted by the bulging portion, it is possible to create a trigger for deformation of the receiving portion.

According to the present invention, the flat portion surrounded by the plurality of seating surfaces is provided on the side surface of the unit case on the outer side in the vehicle width direction, and the plate-like guard member is fixed to the plurality of seating surfaces. A predetermined gap is provided between the flat portions. For this reason, when the bending portion of the side frame is displaced so as to approach from the oblique direction with respect to the side surface of the unit case in the vehicle width direction at the time of collision load input, the input load from the side frame It can be dispersed and received at the flat part. Further, in the present invention, the flat portion provided on the side surface on the outer side in the vehicle width direction of the unit case protrudes to the outer side in the vehicle width direction with respect to other portions in the region surrounded by the plurality of seat surfaces. For this reason, even when the load input position of the bent portion of the side frame is dispersed, the load of the side frame can be received by the flat portion via the guard member.
Therefore, according to the present invention, the input load from the side frame can be efficiently received by the side surfaces of the guard member and the unit case, so the high voltage electrical components in the unit case can be reduced while suppressing the enlargement of the guard member. Can be protected.

FIG. 1 is a plan view of a front portion of a vehicle equipped with a high voltage electrical unit according to an embodiment of the present invention. It is a perspective view of the high voltage | pressure electrical-wiring unit of one Embodiment of this invention. It is the side view which removed the guard member of the high voltage | pressure electrical-connection unit of one Embodiment of this invention. It is the perspective view which removed the guard member of the high voltage | pressure electrical-connection unit of one Embodiment of this invention. It is a front view of the guard member of one embodiment of the present invention. It is a perspective view of a guard member of one embodiment of the present invention. It is sectional drawing which follows the VII-VII line of FIG. 2 of the high voltage | pressure electrical-wiring unit of one Embodiment of this invention. It is a typical bottom view which shows the deformation | transformation behavior of the vehicle body frame of one Embodiment of this invention, and a guard member.

Hereinafter, an embodiment of the present invention will be described based on the drawings.
The vehicle according to the present embodiment is an electric vehicle driven by a motor (a rotating electrical machine). However, the vehicle is not limited to one driven by a motor alone, and may be a hybrid vehicle driven by a combination of an engine and a motor. In the drawing, an arrow FR pointing to the front of the vehicle, an arrow UP pointing to the upper side of the vehicle, and an arrow LH pointing to the left side of the vehicle are described.

FIG. 1 is a schematic plan view of a motor room 2 in front of a passenger compartment of a vehicle 1 as viewed from above.
On the left and right sides of the motor room 2, side frames 3L and 3R extending substantially along the longitudinal direction of the vehicle body are disposed. On the side frames 3L, 3R, many functional parts such as a motor 4 for driving a vehicle (a rotating electric machine), a suspension part on the front side (not shown), an air conditioner (not shown), a radiator (not shown) There is. The motor 4 is disposed substantially at the center of the motor room 2. Above the motor 4, a power control unit 5 (PCU), which is a high voltage electrical unit, is attached. The power control unit 5 is disposed on the right side in the motor room 2 in a biased position.

FIG. 2 is a view of the right side portion of the power control unit 5 as viewed from the upper right front side. Further, FIG. 3 is a view showing the right side of the power control unit 5 from which the guard member 11 described later is removed, and FIG. 4 similarly shows the right side of the power control unit 5 from which the guard member 11 is removed. It is the figure seen from the part diagonally upper side.
The power control unit 5 includes a high voltage electrical component 8 (see FIG. 3) such as an inverter 6 (see FIG. 3) and a DC-DC converter 7 in a substantially rectangular metal unit case 10. . The inverter 6 performs conversion between DC power of a high voltage battery (not shown) mounted at the rear of the vehicle and AC power used by the motor 4 for driving the vehicle. The inverter 6 converts the DC power of the high voltage battery into three-phase AC and supplies the AC power to the motor 4 when the vehicle is traveling, and converts the AC power generated by the motor 4 into DC when the motor 4 generates regenerative power. Supply the high voltage battery. The DC-DC converter 7 converts the high voltage DC power of the high voltage battery into low voltage DC power used by a low voltage battery (not shown).

The unit case 10 has a lower case 10L, an upper case 10U, and an intermediate case 10M, and mainly includes high voltage electrical components 8 such as an inverter 6 and a DC-DC converter 7 in the lower case 10L and the upper case 10U. It is arranged. For example, a heat sink or the like is provided in the intermediate case 10M, and the high-voltage electrical component 8 can be cooled by a coolant supplied from the outside.
At the lower end portion of the intermediate case 10M and the upper end portion of the lower case 10L, flange portions 30 and 31 that protrude outward in the vehicle width direction are provided. The flange portions 30 and 31 extend outward in the vehicle width direction on the side surfaces 10Ms and 10Ls on the outer side in the vehicle width direction of the middle case 10M and the lower case 10L. The middle case 10M and the lower case 10L are coupled by a fastening member 32 such as a bolt in a state where the flange portions 30 and 31 are in contact with each other.

  In the unit case 10, with the power control unit 5 installed in the motor room 2 via the motor 4, the middle case 10M and the lower case 10L are arranged at substantially the same height as the left and right side frames 3L, 3R. There is. Therefore, at least a part of the side frames 3L, 3R and the side surface of the power control unit 5 (high voltage electrical unit) overlap in a side view of the vehicle body. As described above, the power control unit 5 is disposed on the right side in the motor room 2. Therefore, the right side surfaces 10Ms and 10Ls of the middle case 10M and the lower case 10L are the side surfaces of the right side frame 3R. It is arranged close to (the side surface of the motor room 2).

  A guard member 11 made of a metal plate is attached to a central region of the right and left side surfaces 10Ms and 10Ls of the middle case 10M of the unit case 10 and the lower case 10L in the vehicle longitudinal direction. The guard member 11 is a side frame when the right side frame 3R (vehicle body structure) is bent and deformed toward the motor room 2 as shown by a chain line in FIG. 1 when a collision load is input from the front of the vehicle, etc. The local load is suppressed from being input to the middle case 10M and the lower case 10L from the bending portion 3Ra (abutment portion) of 3R, thereby protecting the high voltage electrical component 8 in the unit case 10.

  As shown in FIGS. 3 and 4, on the right side surface 10Ms of the intermediate case 10M, a pair of bosses 12A and 12B whose end faces 12a are flat are spaced apart and protruded in the vehicle longitudinal direction. The end faces 12a of the bosses 12A and 12B are seat surfaces on which upper and lower upper edge portions of the guard member 11 are fastened and fixed by bolts 13 (see FIG. 2 and the like). In addition, the code | symbol 40 in a figure is a connection part of the cooling water piping provided adjacent to the back side of the boss | hub part 12B of rear side among the side surface 10Ms of right side of middle case 10M.

  Similar to the bosses 12A and 12B of the middle case 10M, a boss 12C having a flat end face 12a is provided to protrude on the right side 10Ls of the lower case 10L. The boss 12C of the lower case 10L is disposed substantially directly below the front boss 12A of the middle case 10M. The end face 12 a of the boss 12 C of the lower case 10 L is a seating face on which the lower edge of the front side of the guard member 11 is fastened and fixed by a bolt 13. The bosses 12A, 12B, 12C of the middle case 10M and the lower case 10L protrude toward the right side of the vehicle body. In addition, the code | symbol 14 in a figure is a bolt fastening hole formed in each boss | hub part 12A, 12B, 12C.

  Further, as shown in FIGS. 3 and 4, a boss portion 15 projecting downward is provided at a position close to the side surface 10Ls on the right side substantially in the front-rear direction of the lower surface of the lower case 10L. ing. The end face of the boss portion 15 is an end face 15 a to which a lower bent piece 25 of the guard member 11 described later is bolted.

  As shown in FIGS. 3 and 4, of the right side surface 10Ms of the intermediate case 10M, an end surface facing the right side of the vehicle at a substantially intermediate position between the front boss 12A and the rear boss 12B. Flat portion 16A is formed. In the region between the front and rear bosses 12A and 12B of the right side surface 10Ms of the intermediate case 10M, the flat portion 16A protrudes to the right (outside in the vehicle width direction) compared to the other portions. The flat portion 16A is formed on a part of the right side surface of the flange portion 30 provided at the upper end portion of the intermediate case 10M. The flat portion 16A is formed to be lower than the protruding height of the boss portions 12A, 12B, and 12C (the height of the end surface 12a).

  Of the side surface 10Ls on the right side of the lower case 10L, a flat portion 16B having a flat end surface facing the right side of the vehicle is formed at a position rearward of the boss 12C. The flat portion 16B on the lower case 10L side is formed in the lower case 10L so that a part of the rear region overlaps in the front-rear direction with a part of the front region of the flat portion 16A on the intermediate case 10M side. The flat portion 16B on the lower case 10L side is also similar to the flat portion 16A on the middle case 10M side, compared to the other portion on the rear side of the boss portion 12C on the right side 10Ls of the lower case 10L. (Outside in the width direction). Further, the flat portion 16B is formed to be lower than the protruding height of the boss portions 12A, 12B, and 12C (the height of the end surface 12a). The flat portion 16B is formed on the right side surface of the bulging portion 33 continuously provided below the flange portion 31 of the lower case 10L.

FIG. 5 is a front view of the guard member 11, and FIG. 6 is a perspective view of the guard member 11 as viewed from the back side.
The guard member 11 has a main wall 24 having a substantially rectangular shape in a front view, and the above-mentioned lower bending piece 25 bent inward in the vehicle width direction from the lower edge of the main wall 24 near the rear portion. In the front side of the main wall 24, the central region in the vertical direction is recessed in a substantially U shape to the rear side, and the upper side bulging portion 17U and the lower side bulging portion 17L of the front side are respectively bolt insertion holes 18 are formed.

  In the rear side of the main wall 24 of the guard member 11, the central region in the vertical direction is recessed in a substantially V shape on the front side, and the bolt insertion hole 18 is formed in the bulging portion 19U on the upper side of the rear side ing. At the bottom of the substantially V-shaped hollow portion on the rear side of the main wall 24, a slit 20 having a substantially constant width extending forward from the bottom toward the central region of the main wall 24 is formed. The slits 20 extend from the rear side (periphery) of the guard member 11 toward the inner region of the guard member 11.

  Further, in the upper region of the slit 20 in the main wall 24 of the guard member 11, it is gently bent in a step-like manner toward the rear edge side from the central region side of the main wall 24 outward in the vehicle width direction (right side) An outward bending portion 21 is formed. In addition, a front side region of the main wall 24 with respect to the outward bending portion 21 is a flat receiving portion 24A that can contact the flat portions 16A and 16B of the middle case 10M and the lower case 10L. The outward bending portion 21 is provided at the rear end of the receiving portion 24A, and constitutes a bulging portion that bulges outward in the vehicle width direction. On the other hand, in the lower region of the slit 20 of the main wall 24, there is an inward bent portion 22 gently bent in a step-like manner gradually inward in the vehicle width direction (left side) from the central region side of the main wall 24 toward the rear edge side. It is formed.

  In the guard member 11, the front and rear bulging portions 17U, 17L, 19U of the main wall 24 are overlapped with the middle case 10M of the unit case 10 and the bosses 12A, 12B, 12C of the lower case 10L. , 12B and 12C are fastened and fixed by bolts 13. The lower bending piece 25 is superimposed on the boss portion 15 on the lower surface of the lower case 10L, and in that state, is fastened and fixed to the boss portion 15 by the bolt 13. As a result, the substantially central region in the front-rear direction of the side surfaces 10Ms and 10Ls on the right side of the middle case 10M and the lower case 10L is covered by the guard member 11.

7 is a cross-sectional view taken along the line VII-VII in FIG.
In the guard member 11 attached to the middle case 10M and the lower case 10L as described above, the receiving portion 24A of the main wall 24 is predetermined relative to the flat portions 16A and 16B of the middle case 10M and the lower case 10L. They face each other through the gap d.

FIG. 8 is a schematic bottom view showing the deformation behavior of the right side frame 3R and the guard member 11 when a collision load is input from the front of the vehicle. The guard member 11 is shown in cross section in FIG.
As shown in FIG. 8, when a collision load is input from the front of the vehicle, the middle portion of the side frame 3R of the vehicle body is bent and deformed inward in the vehicle width direction while being buckled from the front. At this time, the bending portion 3Ra of the side frame 3R approaches the right side surface of the middle case 10M and the lower case 10L of the power control unit 5 from a diagonally front as shown by the arrows in FIGS. Displace. As a result, the bending portion 3Ra of the side frame 3R contacts the receiving portion 24A of the main wall 24 of the guard member 11, and the load thereof via the guard member 11 causes the bosses 12A, 12B, 12C, and 12C of the middle case 10M and the lower case 10L. It is received by the 15 end faces 12a, 15a.

Thus, when the displacement of the bent portion 3Ra of the side frame 3R to the oblique rear side proceeds further, the central region (receiving portion 24A) of the main wall 24 of the guard member 11 surrounded by the plurality of bosses 12A, 12B, 12C, 15 Is deformed in the direction of the side surfaces 10Ms and 10Ls of the middle case 10M and the lower case 10L. At this time, since the slit 20 is formed at the rear edge of the main wall 24 of the guard member 11, the central region of the main wall 24 is deformed in the direction of the side surfaces 10Ms and 10Ls by being deformed from the vicinity of the slit 20. The back surface of the main wall 24 abuts on the flat portions 16A and 16B of the middle case 10M and the lower case 10L. As a result, the input load from the bent portion 3Ra of the side frame 3R is received by the bosses 12A, 12B, 12C, 15 and the flat portions 16A, 16B of the middle case 10M and the lower case 10L. At this time, since the flat portions 16A and 16B protrude outward in the vehicle width direction with respect to other portions around the portions, portions other than the flat portions 16A and 16B which do not want to receive direct load input are protected.
The slit 20 straddles the boundary between the receiving portion 24A of the guard member 11 and the outward bending portion 21 (regulating portion) in the front-rear direction, and is open at the rear edge of the guard member 11. Therefore, when the collision load is input, the front receiving portion 24A can be deformed without largely deforming the outward bending portion 21.

  After the receiving portion 24A of the main wall 24 of the guard member 11 abuts on the flat portions 16A and 16B of the middle case 10M and the lower case 10L in this manner, the bent portion 3Ra of the side frame 3R extends along the flat portions 16A and 16B. Even if the side frame 3R is slightly displaced, the excessive displacement of the bending portion 3Ra of the side frame 3R is restrained by the receiving portion 24A of the main wall 24 of the guard member 11. That is, since the receiving portion 24A of the main wall 24 of the guard member 11 is surrounded by the bosses 12A, 12B, 12C, and 15 of the middle case 10M and the lower case 10L, excessive deformation is restricted by these. The central receiving portion 24A of the main wall 24 regulates excessive displacement of the bending portion 3Ra of the side frame 3R. As a result, it is suppressed that bending part 3Ra of side frame 3R protrudes the main wall 24 of the guard member 11, and contact | abuts to side surface 10Ls of lower case 10L.

As described above, in the protective structure of the high voltage electrical unit according to the present embodiment, the bosses 12A, 12B, 12C, and 15 in the vicinity of the right side surfaces 10Ms and 10Ls of the middle case 10M and the lower case 10L Flat portions 16A and 16B which are disposed in the area surrounded by the bosses 12A, 12B, 12C, and 15 and which protrude outward in the vehicle width direction with respect to other parts in the area; The guard member 11 is fixed to the plurality of bosses 12A, 12B, 12C, 15 and a predetermined gap d is provided between the guard member 11 and the flat portions 16A, 16B. For this reason, when a collision load is input, the side frame 3R is bent inward in the vehicle width direction, and the bent portion 3Ra is approached obliquely from the front with respect to the right side surfaces 10Ms and 10Ls of the middle case 10M and the lower case 10L. When displaced, the input load from the bending portion 3Ra can be dispersedly received by the plurality of bosses 12A, 12B, 12C, 15 and the flat portions 16A, 16B. At this time, the excessive displacement of the bending portion 3Ra of the side frame 3R can be restrained by the central deformation region of the main wall 24 of the guard member 11 surrounded by the plurality of boss portions 12A, 12B, 12C, and 15. .
In addition, the flat portions 16A and 16B of the middle case 10M and the lower case 10L protrude outward in the vehicle width direction with respect to other portions in the region surrounded by the plurality of boss portions 12A, 12B and 12C. It is possible to prevent the load from being directly input to other parts of the case 10M and the lower case 10L, that is, the places other than the flat portions 16A and 16B.

  Therefore, when the protective structure of the high voltage electrical unit according to the present embodiment is employed, the input load from the bending portion 3Ra of the side frame 3R is efficiently processed in the relatively narrow area of the side surface of the guard member 11 and the unit case 10. Since it can be well received, the high voltage electrical components in the unit case 10 can be protected while suppressing the increase in size of the guard member 11.

  Further, in the protective structure of the high voltage electrical unit according to the present embodiment, flange portions 30 and 31 projecting outward in the vehicle width direction are provided on the lower portion of the middle case 10M and the upper portion of the lower case 10L. 10L butts the flanges 30 and 31 to each other and is fixed by the fastening member 32, and a part of the flat portion 16A is formed on the side surface of the flange 30. Therefore, when the bent portion 3Ra of the side frame 3R abuts on the flat portions 16A and 16B via the guard member 11, the input load can be received by the highly rigid flange portion 30.

  Further, in the protective structure of the high voltage electrical unit according to the present embodiment, the main wall 24 of the guard member 11 is provided with the slits 20 extending from the periphery toward the inner region, so the bent portion 3Ra of the side frame 3R is When it abuts on the central region of the main wall 24 of the guard member 11, the central region of the main wall 24 is easily deformed in the direction approaching the flat portions 16A and 16B by deforming from the vicinity of the slit 20. Therefore, when this configuration is adopted, the displacement of the bending portion 3Ra of the side frame 3R is more easily restrained by the deformation area of the main wall 24 of the guard member 11. Therefore, it is possible to more reliably suppress the bending portion 3Ra of the side frame 3R protruding from the main wall 24 of the guard member 11 and coming into contact with the side surface 10Ls of the lower case 10L.

  Furthermore, in the protective structure of the high voltage electrical unit according to the present embodiment, the slit 20 straddles the receiving portion 24A and the outward bending portion 21 in the front-rear direction and is open at the rear end edge of the guard member 11 Thus, it is possible to create a trigger for deformation of the receiving portion 24A while restricting an excessive displacement of the bending portion 3Ra of the side frame 3R to the rear side by the outward bending portion 21.

  Moreover, in the protective structure of the high voltage electrical unit according to the present embodiment, the outward bending portion 21 and the inward bending portion on the upper side and the lower side of the main wall 24 of the guard member 11 with the slit 20 interposed therebetween. Since the reference numeral 22 is provided, the main wall 24 can be attached at a position close to the side surfaces 10Ms and 10Ls in accordance with the shape of the side surfaces 10Ms and 10Ls of the unit case 10. Thereby, the load input to the guard member 11 can be suppressed by the bending portion 3Ra of the side frame 3R.

  The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, in the above embodiment, the pair of flat portions 16A and 16B is substantially in the center in the front-rear direction of the side surfaces of the middle case 10M (upper case) and the lower case 10L (lower case) outside in the vehicle width direction. Of the upper case and the lower side of the lower case in the vehicle width direction, substantially at the center in the front-rear direction and at the center in the vertical direction It may be provided in Further, the flat portions may be provided at a plurality of places which are separated in the front-rear direction of the approximate center in the vertical direction among the side surfaces of the upper case and the lower case on the outer side in the vehicle width direction.

3L, 3R ... side frame 4 ... motor (rotary electric machine)
5 ... Power control unit (high voltage electrical equipment unit)
8 ... high voltage electrical components 10 ... unit case 10 L ... lower case (lower case)
10M ... middle case (upper case)
10Ms, 10Ls ...
11 ... guard member 12a ... end face (seating surface)
16A, 16B: Flat portion 20: Slit 21: Outward bending portion (bulging portion)
24A ... Receiving part 30, 31 ... Flange part d ... Clearance

Claims (5)

Has a unit case that houses high-voltage electrical components inside,
A high-voltage electrical equipment unit mounted between the left and right side frames of the vehicle body, and at least a part of the side surface on the outer side in the vehicle width direction of the unit case faces the side surface on the inner side in the vehicle width direction of the side frame. Protection structure of the
A plurality of seating surfaces provided on the side surface of the unit case on the outer side in the vehicle width direction;
In a region surrounded by the plurality of seat surfaces on the side surface, a flat portion provided to protrude outward in the vehicle width direction with respect to other portions in the region;
A protective structure for a high-voltage electrical unit, comprising: a plurality of plate-like guard members fixed to the seat surfaces and facing the flat portion with a predetermined gap therebetween. In the unit case, the upper case and the lower case are fastened and fixed to each other at a flange portion extending outward in the vehicle width direction,
The protective structure of a high voltage electrical unit according to claim 1, wherein at least a part of the flat portion is formed on a side surface of the flange portion on the outer side in the vehicle width direction.   The guard member includes a flat receiving portion facing the flat portion, and a bulging portion provided at a rear end of the receiving portion and bulging outward in the vehicle width direction. The protective structure of the high voltage | pressure electrical-wielding unit of Claim 1 or 2.   The protective structure of the high voltage electrical unit according to any one of claims 1 to 3, wherein the guard member is formed with a slit extending from the periphery of the guard member toward the inner region. The guard member includes a flat receiving portion facing the flat portion, and a bulging portion provided at a rear end of the receiving portion and bulging outward in the vehicle width direction.
The protective structure of a high voltage electrical unit according to claim 4, wherein the slit straddles the receiving portion and the bulging portion in the front-rear direction and is opened at a rear end edge of the guard member.

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