JP2016172507A - Frame structure of battery unit box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage of a frame by sufficiently securing support rigidity of the frame for supporting battery related equipment of a hybrid unit box.SOLUTION: In front and rear stays 40 and 41 of a hybrid unit box 10, upper end sections 60 of vertical sections 40a and 41a are fixed to a vehicle body frame 2, and horizontal sections 40b and 41b are extended from the vehicle body frame 2 side to the vehicle width direction outside. An outer side frame 12 integrally has a connection frame section 50 which is extended between a vehicle width direction outer end 40c of the front side stay 40 and a vehicle width direction outer end 41c of the rear side stay 41 so as to connect the vehicle width direction outer ends 40c and 41c of the front and rear stays 40 and 41 and a support frame section 51 which is extended to a rear side of the rear side stay 41 continuously from a rear end of the connection frame section 50 so as to support an inverter 29, and is fixed to the vehicle width direction outer ends 40c and 41c of the front and rear stays 40 and 41.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a frame structure of a battery unit box of a vehicle.

  Patent Document 1 describes a hybrid unit box that is fixed to a vehicle body frame via front and rear stays. The hybrid unit box includes a lower frame body that houses a first battery-related device group (such as a radiator and an inverter), and an upper box that is placed on the upper surface of the lower frame body and houses a battery or the like. The lower frame body includes two cross frame portions (first cross frame portion and second cross frame portion) that are fixed to the front and rear stays and extend in the vehicle width direction, and outer ends in the vehicle width direction of the two cross frame portions. Two vertical frame portions (first vertical frame portion and second vertical frame portion) extending downward continuously from the first portion, a rear side frame portion extending rearward from the upper end portion of the first vertical frame portion, and a metal plate And a bottom surface portion that is a shaped member. The inverter is disposed behind the first cross frame portion and the first vertical frame portion in the first housing space inside the lower frame body, and is mounted on the bottom surface portion. A radiator is disposed between the two vertical frame portions.

JP 2009-35126 A

  In the hybrid unit box described in Patent Document 1, for example, when the metal bottom surface portion of the hybrid unit box is changed to resin for weight reduction or the like, the support rigidity of the inverter by the bottom surface portion is reduced. It is conceivable to fix to the side frame part and support it by the rear side frame part. However, since the first cross frame portion extends outward in the vehicle width direction from the stay and the rear side frame portion extends rearward from the front end side of the first cross frame portion, the support rigidity of the rear side frame portion that supports the inverter is ensured. It is difficult to cause cracks or the like in part of the rear side frame portion (for example, a portion fixed to the inverter) due to vibration of the inverter, and the frame may be damaged.

  Therefore, an object of the present invention is to provide a frame structure of a battery unit box that can sufficiently secure the support rigidity of the frame that supports the battery-related equipment of the hybrid unit box and can prevent the frame from being damaged.

  In order to solve the above-described problem, the frame structure of the battery unit box according to the first aspect of the present invention fixes a battery box that houses a battery and a battery-related device group disposed below the battery box to the vehicle body frame. A frame structure of a battery unit box of a vehicle that includes a front stay, a rear stay, and a side frame. The stay on the front side is fixed to the vehicle body frame and extends outward in the vehicle width direction, and supports the battery box from below. The rear stay is fixed to the vehicle body frame behind the front stay and extends outward in the vehicle width direction, and supports the battery box together with the front stay from below. The side frame integrally includes a connecting frame portion and a support frame portion, and is fixed to the outer ends in the vehicle width direction of the front and rear stays. The connecting frame portion extends in the front-rear direction between the vehicle width direction outer end portion of the front stay and the vehicle width direction outer end portion of the rear stay, and the vehicle width direction outer end portions of the front and rear stays are connected to each other. Are connected. The support frame portion extends from the connecting frame portion to the front or rear of the front stay, and is disposed rearward of the front or rear stay of the front stay in the battery-related device group. Support battery related equipment.

  In the above configuration, since the connecting frame portion of the side frame connects the outer end portions in the vehicle width direction of the front and rear stays, compared to the case where the outer end portions in the vehicle width direction of the front and rear stays are not connected. Thus, the rigidity of the front and rear stays is increased, and vibrations at the outer ends in the vehicle width direction of the front and rear stays can be suppressed.

  The side frame integrally includes a connecting frame portion and a support frame portion, and is fixed to the outer ends in the vehicle width direction of the front and rear stays, and the support frame portion supports the battery-related equipment. That is, since the side frame is fixed to the front and rear stays and supports the battery-related equipment, for example, compared to the case where the support frame is fixed to the front or rear stay in a cantilevered manner, The support frame has high support rigidity.

  Therefore, it is possible to sufficiently secure the support rigidity of the support frame portion that supports the battery-related device, and to prevent the support frame portion from being damaged due to vibration of the battery-related device. For example, when the battery-related device is an inverter, it is possible to prevent damage to the fixed portion of the inverter of the support frame portion due to the vibration of the inverter.

  A frame structure according to a second aspect of the present invention is the frame structure according to the first aspect described above, wherein the battery-related device group is disposed rearward of the front stay and forward of the rear stay. The connection frame portion of the side frame extends in the front-rear direction on the outer side in the vehicle width direction than the second battery-related device. Of the inner side surface in the vehicle width direction of the connecting frame portion, the facing region that faces the outer side surface in the vehicle width direction of the second battery-related device forms a recess that is recessed outward in the vehicle width direction, and the vehicle width of the second battery-related device. It arrange | positions in the position spaced apart to a vehicle width direction outer side from a direction outer side surface.

  In the above configuration, the opposing region of the connecting frame portion on the inner side surface in the vehicle width direction is disposed at a position spaced from the outer side surface in the vehicle width direction of the second battery-related device to the outer side in the vehicle width direction. When the connecting frame portion is deformed inward in the vehicle width direction when it collides with the frame portion from the outside in the vehicle width direction, it is difficult to contact the second battery-related device, and the contact between the connecting frame portion and the second battery-related device. Can be prevented.

  Moreover, since the opposing area | region which opposes the vehicle width direction outer side surface of the 2nd battery related apparatus among the vehicle width direction inner side surfaces of a connection frame part forms the recessed part dented to the vehicle width direction outer side, it is the 2nd battery by that much. It is easy to ensure a wide distance from the outer side surface of related equipment in the vehicle width direction.

  A frame structure according to a third aspect of the present invention is the frame structure according to the first aspect or the second aspect, wherein the side frame includes an upper plate extending across the vertical direction, and a vehicle width of the upper plate. A plurality of openings penetrating in the vehicle width direction are formed in the inner plate of the connecting frame portion of the side frame.

  In the above configuration, the inner plate of the connection frame portion is formed with a plurality of openings penetrating in the vehicle width direction. For example, the second battery-related device (the cross frame portion of the front stay in the battery-related device group) If the battery-related device (rear battery and the rear frame on the rear side) is a radiator that receives the traveling wind from the outer surface in the vehicle width direction, the plurality of openings are open to the radiator side. The flow of the traveling wind is allowed, the decrease in the flow rate of the traveling wind caused by the connecting frame portion of the side frame can be suppressed, and the decrease in the cooling performance of the radiator can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the support rigidity of the flame | frame which supports the battery related apparatus of a battery unit box is fully ensured, and damage to a flame | frame can be prevented.

It is an external appearance perspective view of the hybrid unit box which concerns on this embodiment. It is II-II arrow sectional drawing of FIG. It is a disassembled perspective view of the hybrid unit box of the state which removed the box cover. It is a top view of a frame body. It is the side view which looked at the frame body of Drawing 4 from the V direction.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. Moreover, in the following description, the left-right direction means the left-right direction with the vehicle facing forward.

  As shown in FIG. 1, a hybrid unit box (battery unit box) 10 of this embodiment is mounted on a vehicle 1 that is a hybrid electric vehicle. The vehicle body frame 2 of the vehicle 1 includes a pair of left and right side members 4 extending in the front-rear direction, and a plurality of cross members 5 extending in the vehicle width direction and connecting the left and right side members 4 to each other (in FIG. A cross member is shown). The hybrid unit box 10 is provided on the outer side in the vehicle width direction of the side member 4 on the left side in the vehicle width direction and between the front wheel (not shown) and the rear wheel (not shown) of the vehicle 1.

  As shown in FIGS. 1 to 3, the hybrid unit box 10 includes a frame body 11 fixed to the vehicle body frame 2, a battery box 14, a box cover 15 fixed to the battery box 14, and a battery box 14. And a battery-related device group 16 disposed below. The frame body 11 includes a pair of front and rear stays 40, 41 fixed to the body frame 2, and left and right side frames 12, 13 fixed to the front and rear stays 40, 41 (outer side frame 12, inner side frame 13). And have. The stay in the present invention is a support member for fixing and supporting the battery box 14 and the like with respect to the vehicle body frame 2.

  The front and rear stays 40, 41 include a vertical portion 40a, 41a on the inner side in the vehicle width direction extending in a substantially vertical direction, and a horizontal portion 40b extending in a substantially horizontal direction by bending outward from the lower end of the vertical portions 40a, 41a in the vehicle width direction. And 41b are integrally formed in a substantially L shape. Bolt holes (not shown) are formed in the upper end portions 60 of the vertical portions 40a and 41a. The front and rear stays 40 and 41 have substantially the same height at two front and rear positions on the outer side surface in the vehicle width direction of the side member 4 on the left side in the vehicle width direction between the front wheel (not shown) and the rear wheel (not shown) of the vehicle 1. Bolts that are spaced apart from each other in the front and back positions and that pass through the bolt holes in the upper end portions 60 of the vertical portions 40a and 41a in a state where the vertical portions 40a and 41a extend below the lower end edges of the side members 4. 6 are fixed to the side members 4 respectively. That is, in the front and rear stays 40, 41, the upper ends 60 of the vertical portions 40a, 41a are fixed to the vehicle body frame 2, and the horizontal portions 40b, 41b extend outward from the vehicle body frame 2 in the vehicle width direction.

  The battery box 14 has a box-shaped upper case 18 that opens downward, and a box-shaped lower case 19 that opens upward, and a plurality of flanges provided on the opening sides of both cases 18 and 19 are provided. It is fixed by bolts (not shown) and formed into a substantially sealed box shape. A plurality of (five in this embodiment) mounting brackets 58 to which a box cover 15 described later is fixed are fixed to the upper surface of the outer end portion of the upper case 18 in the vehicle width direction. The battery box 14 is mounted above the horizontal portions 40b and 41b of the front and rear stays 40 and 41, and is fixed to the stays 40 and 41 by front and rear bands 20 provided on the front and rear stays 40 and 41, respectively. . That is, the front stay 40 and the rear stay 41 support the battery box 14 from below. The band 20 is a metal plate-like body, and extends outward from the upper ends of the vertical portions 40a and 41a of the stays 40 and 41 along the upper surface of the battery box 14 in the vehicle width direction. It curves downward at the outer end and extends downward along the outer side surface of the battery box 14 in the vehicle width direction, and is fixed to the outer end portions 40c, 41c in the vehicle width direction of the horizontal portions 40b, 41b of the stays 40, 41. A first housing space 22 (see FIG. 2) in which a hybrid battery (battery) 21 and the like are housed is partitioned inside the battery box 14. 2, illustration of the hybrid battery 21 etc. accommodated in the 1st accommodation space 22 of the battery box 14 is abbreviate | omitted.

  As shown in FIGS. 1 and 2, the box cover 15 includes a plate-shaped front cover portion 15a, a plate-shaped rear cover portion 15b, a plate-shaped side cover portion 15c on the outer side in the vehicle width direction, and a plate-shaped cover. A resin cover integrally formed with the lower cover portion 15d, which is opened inward and upward in the vehicle width direction, and is attached to a plurality of mounting brackets 58 of the battery box 14 and a cover support bracket 47 of the inner side frame 13 described later. Fixed. The side cover portion 15c is formed with a plurality of (24 in this embodiment) radiator fan intake ports 59, and the radiator fan intake ports 59 are connected to the second housing space 23 and the side cover portions 15c. Communicate with the outside. The plate portions 15 a to 15 d of the box cover 15 are provided on the front side, the rear side, the vehicle width direction outer side (left side), and the lower side of the second accommodation space 23 below the battery box 14 that accommodates the battery-related device group 16. Partition. The upper side of the second accommodation space 23 is partitioned by the lower surface of the battery box 14 (the lower surface of the lower case 19), and the second accommodation space 23 is open to the inner side (right side) in the vehicle width direction. In FIG. 2, illustration of the battery-related device group 16 accommodated in the second accommodation space 23 is omitted.

  As shown in FIG. 3, in the first housing space 22, there is a high necessity for waterproofing, and a hybrid battery 21, a battery fan 24, a fan duct 25, and a battery control, which are devices that are not waterproof themselves. A unit 26, a junction pallet 27, a DC-DC converter 28, and the like are accommodated. The hybrid battery 21 is, for example, a lithium ion battery, and supplies power to a motor generator (not shown) via an inverter 29 described later when the vehicle 1 is started or accelerated. Further, the hybrid battery 21 stores the electric power generated by the motor generator when the vehicle 1 is decelerated or the like via the inverter 29.

  The battery-related device group 16 accommodated in the second accommodation space 23 is a device group that has a low necessity for waterproofing or that is waterproof, and includes an inverter (battery-related device) 29, a radiator (first 2 battery-related devices) 30, a radiator fan 31, a water pump 32, and the like. The inverter 29 performs conversion between a high-voltage direct current and a three-phase alternating current. The radiator 30 performs heat exchange between cooling water that cools the inverter 29 and the like and air (running wind). The radiator fan 31 circulates air through the core 30 a of the radiator 30. A pipe 33 is connected to the water pump 32, and the water pump 32 circulates cooling water in the pipe 33. The battery-related device group 16 is not limited to the above.

  The inverter 29 is arranged behind the stay 41 on the rear side in the second accommodation space 23 (rear end portion of the second accommodation space 23), and is fixed to the left and right side frames 12 and 13 as will be described later. Supported.

  The radiator 30 is disposed at the outer end portion in the vehicle width direction of the second receiving space 23 in the region behind the front stay 40 and ahead of the rear stay 41. The radiator 30 includes front and rear stays 40, 41 from the vicinity of the vehicle width direction outer end portion 40c of the horizontal portion 40b of the front stay 40 to the vicinity of the vehicle width direction outer end portion 41c of the horizontal portion 41b of the rear stay 41. The front end portion of the radiator 30 is fixed to the horizontal portion 40b of the front stay 40 with the surface on the side receiving the traveling wind of the core 30a facing outward in the vehicle width direction. The rear end portion of the radiator 30 is fixed to the horizontal portion 41b of the rear stay 41 (see FIGS. 4 and 5). In a state where the box cover 15 is fixed to the battery box 14, the radiator fan intake port 59 is disposed at a position facing the core 30 a of the radiator 30 from the outside in the vehicle width direction. The air flowing through the core 30a of the radiator 30 in the second housing space 23 flows into the second housing space 23 mainly from the radiator fan intake port 59 of the box cover 15 by the radiator fan 31 and enters the core 30a of the radiator 30. And is discharged to the lower side of the vehicle 1 inside the second housing space 23 in the vehicle width direction.

  As shown in FIGS. 2, 4, and 5, the inner side frame 13 disposed on the inner side in the vehicle width direction of the left and right side frames 12, 13 includes an upper plate 13 a extending across the vertical direction, The upper plate 13a is integrally formed with an inner plate 13b that bends from the inner end edge in the vehicle width direction and extends downward, and has a substantially L-shaped cross section. The inner side frame 13 extends in the front-rear direction below the inner end portion in the vehicle width direction of the horizontal portions 40b, 41b of the front and rear stays 40, 41, and is located on the lower surface of the inner end portion in the vehicle width direction of both horizontal portions 40b, 41b. The plate 13a is fixed by bolts 45 to both horizontal portions 40b and 41b in a state where the upper surface of the plate 13a is in surface contact. The inner side frame 13 has a rear end portion 43 disposed behind the horizontal portion 41 b of the rear stay 41 from the front end portion 42 fixed to the inner end in the vehicle width direction of the horizontal portion 40 b of the front stay 40. The front end portion 42 and the rear end portion 43 are fixed to the inner end portion in the vehicle width direction of the horizontal portion 41b of the stay 41 on the rear side. The rear end portion 43 of the inner side frame 13 is provided with an inverter support portion 44 to which the inverter 29 is fixed. An inner end of the inverter 29 in the vehicle width direction is fixed to the inverter support portion 44, and the inverter support portion 44 supports the inverter 29 together with an inverter support portion 46 of the outer side frame 12 described later. Cover support brackets 47 (FIG. 2 and FIG. 2) for supporting the box cover 15 are provided at three positions, that is, the front end portion 42, the rear end portion 43, and the intermediate portion between the front end portion 42 and the rear end portion 43 of the inner side frame 13. 3) is fixed so as to extend downward from the inner side frame 13.

  An outer side frame (side frame) 12 disposed on the outer side in the vehicle width direction of the left and right side frames 12 and 13 is an upper plate 12a extending across the vertical direction, and an inner edge in the vehicle width direction of the upper plate 12a. And an inner plate 12b that bends and extends downward, and has a substantially L-shaped cross section. The outer side frame 12 extends in the front-rear direction below the vehicle width direction outer ends 40c, 41c of the horizontal portions 40b, 41b of the front and rear stays 40, 41, and is located above the lower surfaces of both vehicle width direction outer ends 40c, 41c. The plate 12a is fixed by bolts 45 to both horizontal portions 40b and 41b with the upper surface of the plate 12a being in surface contact. The outer side frame 12 has a rear end portion disposed behind the horizontal portion 41b of the rear stay 41 from the front end portion 48 fixed to the outer end portion 40c in the vehicle width direction of the horizontal portion 40b of the front stay 40. 49, and the space between the front end portion 48 and the rear end portion 49 is fixed to the vehicle width direction outer end portion 41c of the horizontal portion 41b of the rear stay 41. The rear end portion 49 of the outer side frame 12 is provided with an inverter support portion 46 to which the inverter 29 is fixed. The inverter support portion 46 is fixed to the outer end portion of the inverter 29 in the vehicle width direction, and the inverter support portion 46 supports the inverter 29 together with the inverter support portion 44 of the inner side frame 13. That is, the outer side frame 12 extends between the vehicle width direction outer end portion 40c of the front stay 40 and the vehicle width direction outer end portion 41c of the rear stay 41, and extends in the vehicle width direction of the front and rear stays 40, 41. A connecting frame portion 50 that connects the outer end portions 40c and 41c, and a support frame portion 51 that extends from the rear end of the rear stay 41 continuously from the rear end of the connecting frame portion 50 and supports the inverter 29. It has integrally and is fixed to the vehicle width direction outer end parts 40c and 41c of the front and rear stays 40 and 41.

  The connecting frame portion 50 of the outer side frame 12 is disposed at a position that is farther outward in the vehicle width direction than the radiator 30 and extends in the front-rear direction. The inner plate 12 b of the connecting frame portion 50 has a front region 53, a rear region 54, and an intermediate region 55, and substantially the entire area of the inner plate 12 b faces the outer surface in the vehicle width direction of the radiator 30. The front region 53 of the inner plate 12b extends from the horizontal portion 40b side toward the rear in the vehicle width direction in the vicinity of the vehicle width direction outer end portion 40c of the horizontal portion 40b of the front stay 40. The rear region 54 of the inner plate 12b extends from the horizontal portion 41b side to the front in the vehicle width direction in the vicinity of the vehicle width direction outer end portion 41c of the horizontal portion 41b of the rear stay 41. The intermediate region 55 of the inner plate 12b extends in the front-rear direction between the rear end of the front region 53 and the front end of the rear region 54, and faces the core 30a of the radiator 30 from the outside in the vehicle width direction. That is, the inner side surface in the vehicle width direction of the inner plate 12 b (including the front region 53, the rear region 54, and the intermediate region 55) of the connection frame portion 50 has a facing region 52 that faces the outer surface in the vehicle width direction of the radiator 30. And a recess 56 that is recessed outward in the vehicle width direction. The outer edge in the vehicle width direction of the upper plate 12a of the connecting frame portion 50 is disposed at substantially the same position in the vehicle width direction as the outer edge in the vehicle width direction of the horizontal portions 40b, 41b of the front and rear stays 40, 41, It extends in a straight line. The inner edge in the vehicle width direction of the upper plate 12a is continuous with the upper edge of the inner side surface in the vehicle width direction of the inner plate 12b, and forms a recess 56 that is recessed outward in the vehicle width direction along with the inner side surface in the vehicle width direction of the inner plate 12b.

  A plurality (five in this embodiment) of openings 57 that penetrate in the vehicle width direction are formed in the intermediate region 55 of the inner plate 12b of the connecting frame portion 50. The plurality of openings 57 are each substantially triangular in a side view, and are arranged side by side in the front-rear direction so that the apexes of the triangles are staggered in order from the front.

  The support frame portion 51 of the outer side frame 12 extends linearly backward from the rear end of the connecting frame portion 50. The outer end edge in the vehicle width direction of the upper plate 12a of the support frame portion 51 continuously extends rearward on the same straight line from the outer end edge in the vehicle width direction of the upper plate 12a of the connection frame portion 50. An inner edge in the vehicle width direction of the upper plate 12a of the connecting frame portion 50 extends linearly across the front and rear in parallel with the outer edge in the vehicle width direction.

  In the frame structure of the hybrid unit box 10 configured as described above, the connecting frame portion 50 of the outer side frame 12 connects the outer end portions 40c, 41c of the front and rear stays 40, 41 to each other. The rigidity of the front and rear stays 40, 41 is higher than when the outer ends 40c, 41c of the stays 40, 41 are not connected to each other. For this reason, when the inverter 29 supported by the inverter support part 46 of the rear end part of the outer side frame 12 vibrates, the vibration of the vehicle width direction outer end parts 40c and 41c of the front and rear stays 40 and 41 is suppressed. Can do.

  Further, since the outer side frame 12 is fixed to the front and rear stays 40 and 41 to support the inverter 29, for example, the support frame portion 51 is cantilevered to the rear stay 41 without providing the connecting frame portion 50. The support rigidity of the support frame portion 51 with respect to the inverter 29 is higher than in the case of fixing.

  Therefore, the support rigidity of the outer side frame 12 that supports the inverter 29 of the hybrid unit box 10 can be sufficiently secured, and damage to the fixed portion of the inverter 29 of the support frame portion 51 due to vibration of the inverter 29 or the like can be prevented. .

  Moreover, since the opposing area | region 52 of the vehicle width direction inner side surface of the connection frame part 50 of the outer side frame 12 is arrange | positioned in the position spaced apart from the vehicle width direction outer side surface of the radiator 30 to a vehicle width direction outer side, Even if the vehicle collides with the connecting frame portion 50 of the outer side frame 12 of the vehicle 1 from the outside in the vehicle width direction and the connecting frame portion 50 is deformed inward in the vehicle width direction, the connecting frame portion 50 and the radiator 30 are separated from each other. Therefore, the connecting frame part 50 is less likely to contact the radiator 30. For this reason, the contact between the connecting frame portion 50 and the radiator 30 at the time of a collision with another vehicle can be prevented, and damage to the radiator 30 can be prevented.

  Moreover, since the opposing area | region 52 of the connection frame part 50 of the outer side frame 12 forms the recessed part 56 dented in the vehicle width direction outer side, it is easy to ensure the distance from the vehicle width direction outer surface with the radiator 30 by that much. .

  Further, since a plurality of openings 57 penetrating in the vehicle width direction are formed in the intermediate region 55 of the inner plate 12b of the connecting frame portion 50 facing the core 30a of the radiator 30 from the outside in the vehicle width direction, the plurality of openings 57 are formed. Allows the flow of the traveling wind toward the radiator 30 side, can suppress the decrease in the flow rate of the traveling wind due to the connecting frame portion 50 of the outer side frame 12, and suppress the decrease in the cooling performance of the radiator 30. Can do.

  In addition, since the hybrid unit box 10 includes the resin box cover 15, the box cover and the hybrid unit box 10 can be reduced in weight and the manufacturing cost can be reduced as compared with the case where the hybrid unit box 10 includes a metal box cover. .

  In the present embodiment, the outer side frame 12 is arranged from the front end portion 48 fixed to the outer end portion 40c in the vehicle width direction of the front stay 40 to the rear end portion 49 disposed rearward of the rear stay 41. However, the outer side frame is not limited to this. For example, the outer side frame may be extended from a rear end portion fixed to the vehicle width direction outer end portion 41c of the rear stay 41 to a front end portion arranged in front of the front stay 40. In this case, the support frame portion of the outer side frame continuously extends from the front end of the connection frame and extends forward from the front stay 40, and is disposed in front of the front stay 40 in the battery-related device group 16. Support related equipment.

  In the present embodiment, the concave portion 56 is formed in the facing region 52 of the connecting frame portion 50 in order to prevent the connecting frame portion 50 of the outer side frame 12 and the radiator 30 from contacting each other at the time of a collision with another vehicle. For example, unlike the radiator 30, when a battery-related device that is resistant to a collision is provided on the inner side in the vehicle width direction of the connecting frame portion 50, the recessed portion 56 may not be formed in the facing region 52 of the connecting frame portion 50. .

  Further, when a battery-related device that does not require air permeability unlike the radiator 30 is provided inside the connecting frame portion 50 in the vehicle width direction, a plurality of openings are provided in the intermediate region 55 of the inner plate 12b of the connecting frame portion 50. 57 may not be formed.

  In the present embodiment, the left and right side frames 12 and 13 are formed in a substantially L-shaped cross section, but the cross-sectional shapes of the left and right side frames 12 and 13 are not limited to a substantially L-shaped.

  In this embodiment, the front and rear stays 40 and 41 are integrally formed in a substantially L shape by the vertical portions 40a and 41a and the horizontal portions 40b and 41b. However, the shapes of the front and rear stays 40 and 41 are limited to this. Is not to be done. For example, a substantially T-shape in which the inner end portions in the vehicle width direction of the horizontal portions 40b and 41b, which are separate from the vertical portions 40a and 41a, are fixed to an intermediate portion between the upper end portion 60 and the lower end portion of the vertical portions 40a and 41a. It may be a stay before and after the shape.

  In the present embodiment, the frame body 11 of the hybrid unit box 10 has two (a pair of front and rear) stays 40 and 41. However, the number of stays is not limited to this. The frame body 11 only needs to include at least a pair of front and rear stays 40 and 41. For example, the frame body 11 may include three or more stays including the pair of front and rear stays 40 and 41.

  In the present embodiment, the front and rear stays from the vicinity of the outer end portion 40c in the vehicle width direction of the horizontal portion 40b of the front stay 40 to the vicinity of the outer end portion 41c in the vehicle width direction of the horizontal portion 41b of the rear stay 41 are also provided. The radiator 30 is provided to extend in the front-rear direction between the spaces 40 and 41, and the substantially entire area of the inner plate 12b of the connecting frame portion 50 faces the outer surface in the vehicle width direction of the radiator 30, but the length in the front-rear direction is short. When a radiator is provided, a partial region of the inner plate 12b of the connecting frame portion 50 may face the outer surface in the vehicle width direction of the radiator. That is, you may form the recessed part into which the one part area | region (opposition area | region) of the inner board 12b of the connection frame part 50 is dented in the vehicle width direction outer side.

  Further, the battery-related device is not limited to the inverter 29, and the second battery-related device is not limited to the radiator 30.

  In the present embodiment, the resin box cover 15 is provided, but a metal box cover may be provided instead of the resin box cover 15.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the content of the said embodiment, Of course, it can change suitably in the range which does not deviate from this invention. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  For example, in the above embodiment, the frame structure according to the present invention is applied to the hybrid unit box mounted on the vehicle 1 which is a hybrid electric vehicle. However, the frame structure is applied to a battery unit box mounted on the electric vehicle. Also good.

1: Vehicle 2: Body frame 10: Hybrid unit box (battery unit box)
12: Outer side frame (side frame)
12a: Upper plate 12b of the outer side frame: Inner plate 14 of the outer side frame: Battery box 16: Battery related device group 21: Hybrid battery (battery)
29: Inverter (battery-related equipment)
30: Radiator (second battery-related device)
40: Front stay 40c: Front end in the vehicle width direction of the front stay 41: Rear stay 41c: Outer end in the vehicle width direction of the rear stay 50: Connection frame portion 51: Support frame portion 52: Opposing region 56: Concave portion 57: Multiple openings

Claims (3)

A frame structure of a battery unit box of a vehicle that fixes a battery box that houses a battery and a battery-related device group disposed below the battery box to a vehicle body frame,
A front stay fixed to the body frame and extending outward in the vehicle width direction, and supporting the battery box from below;
A rear stay fixed to the body frame behind the front stay and extending outward in the vehicle width direction, and supporting the battery box from below with the front stay;
A connecting frame portion that extends in the front-rear direction between the outer end portion in the vehicle width direction of the front stay and the outer end portion in the vehicle width direction of the rear stay, and connects the outer end portions in the vehicle width direction; It extends from the connection frame part to the front of the front stay or the rear of the rear stay, and is arranged in front of the front stay or rear of the rear stay in the battery-related equipment group. And a side frame fixed to the outer ends in the vehicle width direction of the front and rear stays. Box frame structure. The frame structure according to claim 1,
The battery-related device group includes a second battery-related device arranged behind the front stay and ahead of the rear stay,
The connecting frame portion of the side frame extends in the front-rear direction on the outer side in the vehicle width direction than the second battery-related device,
A facing region facing an outer surface in the vehicle width direction of the second battery-related device on the inner side surface in the vehicle width direction of the connection frame portion forms a recess recessed outward in the vehicle width direction, and the second battery-related device. A frame structure of a battery unit box, wherein the frame structure is disposed at a position spaced from the outer surface in the vehicle width direction to the outer side in the vehicle width direction. The frame structure according to claim 1 or 2,
The side frame has an upper plate that extends across the up-down direction, and an inner plate that extends downward from the inner edge of the upper plate in the vehicle width direction,
A frame structure of a battery unit box, wherein a plurality of openings penetrating in the vehicle width direction are formed in the inner plate of the connection frame portion of the side frame.

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