WO2022024805A1

WO2022024805A1 - Vehicle body skeleton structure

Info

Publication number: WO2022024805A1
Application number: PCT/JP2021/026752
Authority: WO
Inventors: 浩介山倉
Original assignee: いすゞ自動車株式会社
Priority date: 2020-07-31
Filing date: 2021-07-16
Publication date: 2022-02-03
Also published as: JP7209227B2; JP2022027080A; CN115803251A

Abstract

According to the present invention, left and right rear end pillars 20 stand on both sides in the vehicle width direction on a vehicle rear end, at which a side surface skeleton structure 14 and a rear surface skeleton structure 15 cross, and extend in the vertical direction. An opening lower edge frame 41 extends in the vehicle width direction above a rear end cross member 13 of a vehicle body frame 2 so as to define a lower edge of a rear surface opening 9, connects the left and right rear end pillars 20, and constitutes the rear surface skeleton structure 15. A first cross frame 43 extends in the vehicle width direction on the vehicle front side of the opening lower edge frame 41 and connects the left and right side surface skeleton structures 14. Left and right front-rear connection frames 45 are arranged to be spaced apart from each other in the vehicle width direction, extend in the vehicle front-back direction, and connect the opening lower edge frame 41 and the first cross frame 43.

Description

Vehicle body skeleton structure

This disclosure relates to the body skeleton structure of the vehicle.

Patent Document 1 illustrates a rear body structure of a bus in which a plurality of cross beams are fixed to a rear member of the bus as a skeleton material. The plurality of cross beams are arranged vertically apart so as to have different height positions, and extend substantially horizontally in the vehicle width direction.

Japanese Patent Application Laid-Open No. 10-250382

When a large in-vehicle component (for example, a battery for driving) is mounted and placed at the rear of a bus (vehicle) from the rear of the vehicle, it is necessary to provide a rear opening with a large vertical width on the rear surface of the body as a work space.

However, in order to provide a rear surface opening having a large vertical width in the structure of Patent Document 1, it is necessary to increase the vertical space between the cross beams and arrange the cross beam. Invite.

Therefore, the present disclosure aims to provide a vehicle body skeleton structure capable of expanding the rear opening while ensuring the rigidity of the rear surface of the body.

In order to achieve the above object, the first aspect of the present disclosure is a vehicle body skeleton structure in which the side surface of the body is composed of the left and right side skeleton structures and the rear surface of the body is composed of the rear surface skeleton structure. In the body skeleton structure, the rear ends of the left and right side members extending in the vehicle front-rear direction on both sides in the vehicle width direction are supported from below by the vehicle body frame connected by the rear end cross members extending in the vehicle width direction. The body skeleton structure includes left and right rear end pillars, an opening lower edge frame, a first cross frame, and left and right front and rear connecting frames.

The left and right rear end pillars stand up on both sides in the vehicle width direction at the rear end of the vehicle where the side skeleton structure and the rear skeleton structure intersect, and extend in the vertical direction. The lower edge frame of the opening extends in the vehicle width direction above the rear end cross member so as to partition the lower edge of the rear opening, and connects the left and right rear end pillars to form a rear skeletal structure. The first cross frame extends in the vehicle width direction in front of the vehicle at the lower edge frame of the opening and connects the left and right side skeleton structures. The left and right front-rear connecting frames are arranged apart from each other in the vehicle width direction and extend in the vehicle front-rear direction to connect the opening lower edge frame and the first cross frame.

In the first aspect, the load input from the axle of the rear wheel to the rear surface side of the body via the vehicle body frame while the vehicle is running or the like is left and right from the opening lower edge frame via the left and right front-rear connecting frames and the first cross frame. It is transmitted to the lateral skeletal structure. In this way, the load input to the rear surface side of the body can be distributed and supported in the left and right side skeletal structures via the left and right front-rear connecting frames and the first cross frame, so that the vertical width of the rear surface opening is expanded. The decrease in rigidity of the rear surface of the body due to (providing a wide space above the opening lower edge frame) can be reliably suppressed by the left and right front-rear connecting frames and the first cross frame. Therefore, the rear surface opening can be expanded while ensuring the rigidity of the rear surface of the body.

A second aspect of the present disclosure is the body skeletal structure of the first aspect, one or more second crosses extending above the first cross frame in the vehicle width direction and connecting the left and right side skeletal structures. Equipped with a frame.

In the second aspect, since the left and right side skeleton structures are connected by the second cross frame, the load input to one side skeleton structure can be transmitted to the other side skeleton structure via the second cross frame. , The rigidity of the entire rear part of the body can be increased. Therefore, it is possible to more reliably suppress the decrease in the rigidity of the rear surface of the body due to the expansion of the rear surface opening.

The third aspect of the present disclosure is the body skeletal structure of the second aspect, and the side skeletal structure has left and right intermediate pillars that stand up at substantially the same vehicle front-rear position as the first cross frame. The second cross frame connects the left and right intermediate pillars.

In the third aspect, since the left and right intermediate pillars that stand up at substantially the same vehicle front-rear position as the first cross frame are connected by the second cross frame, the rear part of the body with respect to the load input from the first cross frame to the left and right side skeleton structures. The overall rigidity can be increased efficiently.

The fourth aspect of the present disclosure is the body skeleton structure of the first to third aspects, and in-vehicle parts are mounted on the left and right front-rear connecting frames.

In the fourth aspect, since the load input from the in-vehicle component can be distributed and supported by the rear surface skeleton structure and the left and right side surface angle measuring structures, even if the in-vehicle component is a heavy object, the in-vehicle component can be supported. Support rigidity can be ensured.

A fifth aspect of the present disclosure is the body skeleton structure of the second or third aspect, in which vehicle-mounted parts are mounted on the left and right front-rear connecting frames, and the mounted vehicle-mounted parts are the second cross frame. In the fifth aspect of being fixed to the vehicle-mounted component, the load input from the vehicle-mounted component can be distributed and supported by the rear skeleton structure and the left and right side surface angle measuring structures, so that the vehicle-mounted component is a heavy object. However, the support rigidity of the in-vehicle parts can be ensured.

Since the in-vehicle parts are fixed to the second cross frame, the support state of the in-vehicle parts can be stabilized.

The sixth aspect of the present disclosure is the body skeleton structure of the first to fifth aspects, and includes one or a plurality of upper and lower connecting members. The upper and lower connecting members are arranged between the rear end cross member and the opening lower edge frame to connect the rear end cross member and the opening lower edge frame.

In the sixth aspect, since the lower edge frame of the opening and the rear end cross member are connected by the upper and lower connecting members, the rigidity of the rear surface of the body can be further increased.

A sixth aspect of the present disclosure is the body skeleton structure of the first to sixth aspects, wherein the rear opening is an opening lower edge frame extending in the vehicle width direction below the center of the vertical height of the rear surface of the body. It is partitioned by the left and right rear end pillars and the rear end panel of the ceiling surface skeleton structure that constitutes the body ceiling surface.

A seventh aspect of the present disclosure is the body skeleton structure of the sixth aspect, in which the rear end panel extends in the vehicle width direction, and both ends thereof in the vehicle width direction are the upper end portions of the left and right rear end pillars and the first rear pillar. It is fixed and supported at the upper end of the.

According to the present disclosure, it is possible to expand the rear opening while ensuring the rigidity of the rear surface of the body.

FIG. 1 is a perspective view of the body skeleton structure according to the present embodiment as viewed diagonally from the rear. FIG. 2 is a perspective view of the body skeleton structure of FIG. 1 as viewed diagonally from the front. FIG. 3 is a side view of the body skeleton structure of FIG. 1 as viewed from the outside in the vehicle width direction. FIG. 4 is a rear view of the body skeleton structure of FIG. 1 as viewed from the rear of the vehicle. FIG. 5 is a plan view of the body skeleton structure of FIG. 1 as viewed from above. FIG. 6 is an enlarged view of a main part of FIG.

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

As shown in FIGS. 1 to 5, the vehicle 1 according to the present disclosure is a bus having a body skeleton structure 3 supported from below by a vehicle body frame 2, and a battery is accommodated behind the vehicle in the passenger compartment 4 in which an occupant gets in. A room (vehicle-mounted parts accommodating room) 5 is provided. The battery accommodating chamber 5 is equipped with a battery unit 6 (see FIGS. 3 to 5) as an in-vehicle component that supplies power to a drive motor (not shown). The battery unit 6 of the present embodiment is composed of two batteries 7 arranged so as to be vertically overlapped with each other, and a battery support frame 8 for connecting and integrating the upper and lower batteries 7. The rear surface of the body is provided with a rear surface opening 9 that opens the rear surface of the battery accommodating chamber 5. The rear opening 9 is formed to have a large left-right width and a large vertical width so as to effectively function as a work space when a large battery unit 6 which is a heavy object is mounted and arranged from the rear of the vehicle.

The vehicle body frame 2 is composed of a pair of left and right side members 10 extending in the vehicle front-rear direction on both sides in the vehicle width direction, and a plurality of cross members 11 extending in the vehicle width direction and connecting the left and right side members 10. The side member 10 of the present embodiment is a split type side member divided into a plurality of parts in the front-rear direction of the vehicle, and has left and right rear side members 12 extending in the front-rear direction at the rear end portion of the vehicle 1. The plurality of cross members 11 include a rear end cross member 13 that connects the rear end portions of the left and right rear side members 12. The left and right side members 10 may be a non-divided type (integrated type) that is continuous in the entire vehicle length range.

The left and right body side surfaces of the vehicle 1 are each composed of the side skeleton structure 14, the rear surface of the body is composed of the rear surface skeleton structure 15, and the body ceiling surface is composed of the ceiling surface skeleton structure 16. The skeletal structure is a structure formed by crossing and connecting a plurality of frame materials. The cross-sectional shape of the frame material (including the frame material of the body side surface, the body rear surface, and the body ceiling surface, the first cross frame 43, the second cross frame 44, and the front-rear connecting frame 45, which will be described later) constituting the body skeleton structure 3 is , U-shape, rectangular cylinder, etc. can be set to any shape according to the required strength.

The left and right side skeleton structures 14 include a plurality of pillars 17, a plurality of side frames 18, and a plurality of

side connecting frames

26, 27, 28 as frame materials. The plurality of pillars 17 include a rear end pillar 20, a first rear pillar 21, and a second rear pillar (intermediate pillar) 22. The plurality of side frames 18 include a lower side frame 23, an intermediate side frame 24, and an upper side frame 25.

The left and right rear end pillars 20 stand upright on both sides in the vehicle width direction at the rear end of the vehicle where the side skeleton structure 14 and the rear surface skeleton structure 15 intersect, and extend in the vertical direction. Is fixed. The first rear pillar 21 extends in the vertical direction in front of the rear end pillar 20, and the second rear pillar 22 extends in the vertical direction in front of the first rear pillar 21. The rear end pillar 20 and the first rear pillar 21 are connected by a side surface connecting frame (side surface first horizontal connecting frame 26) extending in the front-rear direction. Similarly, the first rear pillar 21 and the second rear pillar 22 are connected by a side surface connecting frame (side surface second horizontal connecting frame 27) extending in the front-rear direction.

The lower side frame 23 extends in the front-rear direction above the vehicle body frame 2, and the rear end portion of the lower side frame 23 is fixed to the rear end pillar 20. The front end portion of the lower side frame 23 is fixed to a side connecting frame (wheel house upper vertical frame 28) extending in the vertical direction above the vehicle body frame 2. The intermediate side frame 24 extends in the front-rear direction above the lower side frame 23, and the rear side of the intermediate side frame 24 and the lower side frame 23 are connected by the lower portion of the first rear pillar 21 and the upper vertical frame 28 of the wheel house. .. The wheel house upper vertical frame 28 is arranged at substantially the same vehicle front-rear position as the second rear pillar 22 (see FIGS. 3 and 6). The upper side frame 25 extends in the front-rear direction above the intermediate side frame 24, and the upper end portion of the first rear pillar 21 and the upper end portion of the second rear pillar 22 are fixed to the upper side frame 25.

An arch-shaped rear fender 30 that partitions the upper part of the wheel house 29 is fixed below the lower side frame 23. The rear wheel tire 31 (see FIG. 3) is housed in the wheel house 29, and the vehicle body frame 2 is supported by the rear wheel axle (not shown) via a suspension (not shown). A reinforcing member 32 that reinforces the rear side of the wheel house 29 is fixed to the upper surface of the rear end cross member 13 behind the rear fender 30.

The ceiling surface skeleton structure 16 includes a beam-shaped rear end panel 33, a plurality of ceiling beams 34, and a plurality of ceiling surface connecting frames 35 as frame materials, and the plurality of ceiling beams 34 are the first ceiling beam 36 and the first ceiling beam 36. 2 Ceiling beams 37 are included. The beam-shaped rear end panel 33 extends in the vehicle width direction, and both ends of the beam-shaped rear end panel 33 in the vehicle width direction are fixedly supported by the upper end portion of the rear end pillar 20 and the upper end portion of the first rear pillar 21. The first ceiling beam 36 extends in the vehicle width direction in a state of being overlapped and fixed to the front surface of the beam-shaped rear end panel 33, and the other ceiling beams 34 (including the second ceiling beam 37) are the first ceiling beams 36. In front of each other, they are separated from each other in the front-rear direction and extend in the width direction of the vehicle. Both ends of the other ceiling beams 34 in the vehicle width direction are fixed and supported by the upper side frame 25. The ceiling surface connecting frame 35 extends in the front-rear direction of the vehicle and connects the ceiling beams 34 which are separated from each other in the front-rear direction.

The rear skeleton structure 15 has a plurality of left and right rear end pillars 20, beam-shaped rear end panels 33, left and right rear end frame 40, and opening lower edge frames 41 as frame materials (one pair on the left and right in this embodiment). ) Is provided with the upper and lower connecting frames 42. The left and right rear end cross member frames 40 stand up from the upper surfaces of both end portions of the rear end cross member 13 in the vehicle width direction and extend upward, and the lower end portions of the rear end cross member 13 are fixed to the rear end cross member 13. The lower portions of the left and right rear end pillars 20 are fixed to the left and right rear end surface frame 40, respectively.

The lower edge frame 41 of the opening extends in the vehicle width direction above the rear end cross member 13 and below the center of the vertical height of the rear surface of the body so as to partition the lower edge of the rear opening 9, and the left and right rear end pillars. 20 are connected. Both ends of the opening lower edge frame 41 in the vehicle width direction are placed and fixed on the upper ends of the rear end surface frame 40, and are fixed to the rear end pillar 20. The left and right upper and lower connecting frames 42 extend in the vertical direction between the opening lower edge frame 41 and the reinforcing member 32, and the upper end and the lower end of the upper and lower connecting frame 42 are formed into the opening lower edge frame 41 and the reinforcing member 32. Each is fixed. That is, the upper and lower connecting frame 42 and the reinforcing member 32 are arranged between the rear end cross member 13 and the opening lower edge frame 41, and form a vertical connecting member that connects the rear end cross member 13 and the opening lower edge frame 41. do. The positions of the left and right upper and lower connecting frames 42 in the vehicle width direction are set to be substantially the same as the positions of the left and right front and rear connecting frames 45 in the vehicle width direction, which will be described later.

In the present embodiment, the upper edge of the rear opening 9 is partitioned by the beam-shaped rear end panel 33, and both side edges of the rear opening 9 in the vehicle width direction are partitioned by the left and right rear end pillars 20, but the rear opening 9 is divided. The upper edge and both side edges may be partitioned by other members. For example, an opening upper edge frame extending below the beam-shaped rear end panel 33 extending in the vehicle width direction and connecting the left and right rear end pillars 20 may be provided, and the upper edge of the rear opening 9 may be partitioned by the opening upper edge frame. Further, left and right opening side edge frames extending in the vertical direction inside the left and right rear end pillars 20 in the vehicle width direction to connect the opening lower edge frame 41 and the beam-shaped rear end panel 33 are provided, and the rear surface is provided by the left and right opening side edge frames. The left and right side edges of the opening 9 may be partitioned.

The body skeleton structure 3 includes a first cross frame 43, upper and lower second cross frames 44, and left and right front-rear connecting frames 45 as frame materials. The first cross frame 43 extends in the vehicle width direction in front of the vehicle at the lower edge frame 41 of the opening and connects the left and right side skeleton structures 14. In the present embodiment, both ends of the first cross frame 43 in the vehicle width direction are fixed to the inner side surfaces of the left and right wheel house upper vertical frames 28 in the vehicle width direction. Since the wheel house upper vertical frame 28 is arranged at substantially the same vehicle front-rear position as the second rear pillar 22, the second rear pillar 22 stands up at substantially the same vehicle front-rear position as the first cross frame 43. The first cross frame 43 is provided at a height position between the lower side frame 23 and the intermediate side frame 24.

The upper and lower second cross frames 44 extend above and below the first cross frame 43 in the vehicle width direction, and connect the left and right side skeleton structures 14. A partition wall (not shown) that separates the vehicle interior 4 and the battery accommodating chamber 5 is fixed to the upper and lower second cross frames 44. In the present embodiment, both ends of the second cross frame 44 in the vehicle width direction are fixed to the inner side surfaces of the left and right second rear pillars 22 in the vehicle width direction. The number of the second cross frames 44 is not limited to two, and may be one or three or more.

The left and right front-rear connecting frames 45 are arranged apart from each other in the vehicle width direction and extend in the vehicle front-rear direction to connect the opening lower edge frame 41 and the first cross frame 43. In the present embodiment, the front end portion of the front-rear connecting frame 45 is fixed to the vehicle rear surface of the first cross frame 43, and the rear end portion of the front-rear connecting frame 45 is placed and fixed on the upper surface of the opening lower edge frame 41. ..

A battery support member 46 that supports the battery unit 6 from the front is fixed to the rear surface of the vehicle of the second cross frame 44. The battery unit 6 is placed and fixed on the left and right front / rear connecting frames 45. Further, the vehicle front portion of the battery unit 6 is fixed to the second cross frame 44 via the battery support member 46.

According to the present embodiment, the load input from the axle of the rear wheel to the rear surface side of the body via the vehicle body frame 2 while the vehicle 1 is traveling is the left and right front / rear connecting frame 45 and the first cross frame from the opening lower edge frame 41. It is transmitted to the left and right lateral skeletal structures 14 via 43. In this way, the load input to the rear surface side of the body can be distributed and supported by the left and right side surface skeleton structures 14 via the left and right front-rear connecting frames 45 and the first cross frame 43, so that the upper and lower sides of the rear surface opening 9 can be supported. The decrease in rigidity of the rear surface of the body due to the increase in width (providing a wide space above the opening lower edge frame 41) can be reliably suppressed by the left and right front-rear connecting frames 45 and the first cross frame 43. Therefore, the rear surface opening 9 can be expanded while ensuring the rigidity of the rear surface of the body.

Since the left and right side skeleton structures 14 are connected by the second cross frame 44, the load input to one side skeleton structure 14 can be transmitted to the other side skeleton structure 14 via the second cross frame 44. The rigidity of the entire rear part of the body can be increased. Therefore, it is possible to more reliably suppress the decrease in the rigidity of the rear surface of the body due to the expansion of the rear surface opening 9.

Since the left and right second rear pillars 22 that stand up at substantially the same vehicle front-rear position as the first cross frame 43 are connected by the second cross frame 44, the rear part of the body with respect to the load input from the first cross frame 43 to the left and right side skeleton structures 14. The overall rigidity can be increased efficiently.

Since the load input from the battery unit 6 can be distributed and supported by the rear skeleton structure 15 and the left and right side surface angle measuring structures, the support rigidity of the heavy battery unit 6 can be ensured.

Since the front portion of the battery unit 6 is fixed to the second cross frame 44, the support state of the battery unit 6 can be stabilized.

Further, since the lower edge frame 41 of the opening and the rear end cross member 13 are connected by the upper and lower connecting frames 42 and the reinforcing member 32, the rigidity of the rear surface of the body can be further increased.

Although the present invention has been described above based on the above embodiment, the present invention is not limited to the contents of the above embodiment, and can be appropriately modified without departing from the present invention. That is, it goes without saying that all other embodiments, examples, operational techniques, and the like made by those skilled in the art based on this embodiment are included in the scope of the present invention.

For example, in the above embodiment, the battery unit 6 has been illustrated as an in-vehicle component, but an in-vehicle component other than the battery unit 6 may be mounted. Further, the number of the front-rear connecting frames 45 is not limited to two, and may be three or more.

This application is based on a Japanese patent application filed on July 31, 2020 (Japanese Patent Application No. 202-130872), the contents of which are incorporated herein by reference.

The present invention can be applied to a vehicle having a body skeleton structure.

1: Vehicle 2: Body frame 3: Body skeleton structure 4: Vehicle room 5: Battery storage room 6: Battery unit (vehicle-mounted parts)
9: Rear opening 10: Side member 11: Cross member 12: Rear side member 13: Rear end cross member 14: Side skeleton structure 15: Rear skeleton structure 16: Ceiling surface skeleton structure 20: Rear end pillar 21: 1st rear pillar 22: 2nd Rear pillar (intermediate pillar)
23: Lower side frame 22: Intermediate side frame 25: Upper side frame 29: Wheel house 30: Rear fender 31: Tire 32: Reinforcing member (upper and lower connecting member)
40: Rear end frame 41: Opening lower edge frame 42: Upper and lower connecting frame (upper and lower connecting member)
43: 1st cross frame 44: 2nd cross frame 45: Front and rear connecting frame

Claims

The rear ends of the left and right side members extending in the front-rear direction of the vehicle on both sides in the vehicle width direction are supported from below by the vehicle body frame connected by the rear end cross members extending in the vehicle width direction, and the side surfaces of the body are supported by the left and right side skeleton structures. It is the body skeleton structure of the vehicle that is composed and the rear surface of the body is composed of the rear skeletal structure.
The left and right rear end pillars that stand on both sides in the vehicle width direction and extend in the vertical direction at the rear end of the vehicle where the side skeleton structure and the rear surface skeleton structure intersect.
An opening lower edge frame extending in the vehicle width direction above the rear end cross member so as to partition the lower edge of the rear surface opening and connecting the left and right rear end pillars to form the rear surface skeleton structure.
A first cross frame extending in the vehicle width direction in front of the vehicle of the opening lower edge frame and connecting the left and right side skeletal structures,
A vehicle body skeleton structure comprising: left and right front-rear connecting frames that are arranged apart from each other in the vehicle width direction and extend in the front-rear direction of the vehicle to connect the opening lower edge frame and the first cross frame.
The body skeletal structure according to claim 1.
A vehicle body skeleton structure comprising one or more second cross frames extending above the first cross frame in the vehicle width direction and connecting the left and right side skeleton structures.
The body skeletal structure according to claim 2.
The side skeleton structure has left and right intermediate pillars that stand up at substantially the same vehicle front-rear position as the first cross frame.
The second cross frame is a vehicle body skeleton structure characterized by connecting the left and right intermediate pillars.
The body skeleton structure according to any one of claims 1 to 3.
A vehicle body skeleton structure characterized in that in-vehicle parts are placed on the left and right front-rear connecting frames.
The body skeleton structure according to claim 2 or 3.
In-vehicle parts are mounted on the left and right front and rear connecting frames.
The vehicle-mounted component previously placed is a vehicle body skeleton structure characterized in that it is fixed to the second cross frame.
The body skeleton structure according to any one of claims 1 to 5.
A vehicle body skeleton that is arranged between the rear end cross member and the opening lower edge frame and includes one or more upper and lower connecting members that connect the rear end cross member and the opening lower edge frame. structure.
The body skeleton structure according to any one of claims 1 to 6.
The rear opening is
With the opening lower edge frame extending in the vehicle width direction below the center of the vertical height of the rear surface of the body.
With the left and right rear end pillars,
The rear end panel of the ceiling surface skeleton structure that constitutes the body ceiling surface,
The body skeletal structure of the vehicle, characterized by being partitioned by.
The body skeletal structure according to claim 7.
The rear end panel extends in the vehicle width direction, and both ends in the vehicle width direction are fixed and supported by the upper ends of the left and right rear end pillars and the upper ends of the first rear pillar. structure.