JP2014151891A - Body structure of electric power vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a body structure of an electric power vehicle excellent in workability of mounting a battery pack and a fuel tank by which the battery pack and the fuel tank are protected from road surface interference, a flying stone, etc.SOLUTION: The body structure of an electric power vehicle includes a mounting frame 20 provided with a plurality of front to back beam members 31L, 31R, 32L and 32R, and a pair of vehicle width direction beam members 21 and 25, and an undercover 35 for covering the lower part of the mounting frame 20. The mounting frame 20 on which a fuel tank 41 and a battery pack 42 are mounted is mounted on the lower surface of the vehicle body so that workability of mounting the fuel tank 41 and the battery pack 42 is significantly improved. The lower surface of the fuel tank 41 and the battery pack 42 is covered by the undercover 35 so that the fuel tank 41 and the battery pack 42 are protected from road surface interference, a flying stone, etc.

Description

  The present invention relates to a vehicle body structure of an electric power vehicle, and more particularly to a vehicle body structure of an electric power vehicle in which a fuel tank and a battery pack are arranged at the lower part of the vehicle body.

  In recent years, electric powered vehicles such as hybrid vehicles using an engine and an electric motor as driving sources have been put into practical use. In an electrically powered vehicle having such an engine and an electric motor, a secondary battery and a fuel tank for driving and charging a large capacity vehicle are mounted.

  Generally, as a secondary battery for driving a vehicle, a collective secondary battery configured by connecting a plurality of batteries such as a nickel metal hydride battery and a lithium ion battery so as to obtain a necessary power capacity is often used. Such a secondary battery is incorporated in a battery pack together with other accessories and mounted on a vehicle.

  There are various vehicle body structures in which these fuel tanks and secondary batteries are mounted on a vehicle. For example, the vehicle body rear structure disclosed in Patent Document 1 includes a kick-up portion that extends upward from the rear end of the front floor panel, a rear floor panel that extends rearward from the upper end of the kick-up portion, and a vehicle on the rear side of the kick-up portion. A rear structure of a vehicle having a front cross member extending in the width direction and a rear cross member extending in the vehicle width direction on the lower side of the rear floor panel, the vehicle width direction between the front cross member and the rear cross member An intermediate cross member extending in the direction is installed, and a plurality of batteries are installed between the front cross member and the intermediate cross member so as to be detachable from below while being accommodated in the battery case. On the other hand, a relatively small fuel tank is disposed between the intermediate cross member and the rear cross member and is supported from below by a long metal member.

JP 2011-111124 A

  According to the vehicle body structure of Patent Document 1, an intermediate cross member is disposed between the front cross member and the rear cross member on the lower side of the rear floor panel, and a plurality of batteries are provided between the front cross member and the intermediate cross member. The battery case and the fuel tank can be disposed in the space below the rear floor panel by detachably installing the battery case in which the battery is housed and installing the fuel tank between the intermediate cross member and the rear cross member.

  However, in mounting a battery case and a fuel tank on a vehicle body in a factory, etc., a step of attaching a battery case containing a plurality of batteries between the front cross member and the intermediate cross member from below the vehicle body is separate from this step. There is a concern that an additional fuel tank may be attached by a long member between the intermediate cross member and the rear cross member, and an increase in the assembly process to the vehicle body and the work become complicated.

  In addition, a battery case is disposed between the front cross member and the intermediate cross member, and a fuel tank is disposed between the intermediate cross member and the rear cross member, so that the shape of the lower surface of the vehicle body becomes complicated, the running air resistance, That is, the aerodynamic force increases, the battery case and the fuel tank interfere with the road surface, and there is a concern about damage due to stepping stones.

  Furthermore, since an intermediate cross member that supports the battery case and the fuel tank is provided between the front cross member and the rear cross member, the vehicle that uses an engine that requires a relatively large fuel tank as a travel drive source. It is difficult to share with the car body floor.

  Therefore, the object of the present invention made in view of such points is excellent in mounting workability of the fuel tank and the battery pack, aerodynamic reduction during traveling is obtained, and the battery pack and the fuel tank are protected from road surface interference, stepping stones, etc. Another object of the present invention is to provide a vehicle body structure for an electrically powered vehicle that is excellent in versatility.

  The vehicle body structure of an electric power vehicle according to claim 1, which achieves the above object, includes a plurality of front and rear beam members extending along the vehicle body longitudinal direction and spaced apart from each other in the vehicle width direction, and the plurality of front and rear beam members. A mounting frame including a pair of vehicle width direction beam members connected to the front and rear ends and extending in the vehicle width direction; and an under cover that covers a lower portion of the mounting frame; and a fuel tank on the mounting frame The battery pack is fixed to the mounting frame and to the side of the fuel tank, and the mounting frame is attached to the lower surface of the vehicle body.

  According to this, the fuel tank and the battery pack are fixed in advance to the mounting frame to which the under cover is attached, and the fuel tank and the battery pack are attached by a simple operation of attaching the mounting frame to which the fuel tank and the battery pack are attached to the lower surface of the vehicle body from below. The battery packs are simultaneously mounted at the same time, and the mounting process can be greatly shortened, and the mounting workability of the fuel tank and the battery pack is greatly improved.

  Further, the lower surface of the fuel tank and the battery pack is covered with the under cover, and the lower surface of the vehicle body is smoothed, so that aerodynamic force associated with traveling is suppressed and traveling stability is improved. Furthermore, the fuel tank and the battery pack are protected from road surface interference and stepping stones.

  Furthermore, the vehicle body structure from which the mounting frame is removed is not changed from the vehicle body structure of the vehicle using the engine as a driving source, and a relatively large fuel tank can be mounted instead of the mounting frame. The vehicle body can be shared with the vehicle.

  According to a second aspect of the present invention, in the vehicle body structure of the electric power vehicle according to the first aspect, each of the beam members in the vehicle width direction includes a U-shaped or U-shaped raised portion having an open lower portion, and the raised portion. Extending in the vehicle width direction away from each lower end of each of the plurality of front and rear beam members, the vehicle width direction outer ends of the extending portions of the opposed vehicle width direction beam members facing each other An outer front and rear beam member whose front and rear ends are joined to the portion, and an inner front and rear beam member whose front and rear ends are joined to the vehicle width direction outer end portions of the respective extending portions of the respective vehicle width direction beam members facing each other, A fuel tank mounting portion and a battery pack mounting portion are formed by the pair of extending portions and the outer front and rear beam members and the inner beam member on both sides of the protruding portion, respectively, and the under cover is formed on the protruding portions from below. A raised surface extending in the longitudinal direction of the vehicle body in a U-shape or U-shape that is inserted and opened downward; Characterized by comprising a fuel tank cover unit and the battery pack cover portion covering the fuel tank mounting portion extends in the vehicle width direction and the battery pack mounting portion from below away from each other from the lower end of Okoshimen.

  According to this, an arrangement space for the propeller shaft, the exhaust pipe, and the like is formed below by the raised portions of the beam members in the vehicle width direction and the raised surface of the under cover, and the fuel is provided by arranging the exhaust pipe below the under cover. The fuel tank and the battery pack disposed on the tank mounting portion and the battery pack mounting portion are protected from the heat of the exhaust pipe by the heat shielding effect by the under cover.

  The invention according to claim 3 is the vehicle body structure of the electric power vehicle according to claim 1 or 2. The underside of the vehicle body includes a front floor panel, a kick-up portion provided so as to rise from a rear end portion of the front floor panel, and a rear floor panel extending rearward from the upper portion of the kick-up portion, The frame is characterized in that the frame is spanned from below and assembled to a front cross member joined to the kick-up portion and a rear cross member provided on the lower side of the rear floor panel.

  According to this, the mounting frame is mounted on the front cross member to which the kick-up portion is joined and the rear cross member provided on the lower side of the rear floor panel from the lower side and assembled, so that the lower side of the rear floor panel is assembled. A fuel tank and a battery pack can be arranged in the space.

  According to the present invention, the fuel tank and the battery pack are fixed to the mounting frame to which the under cover is attached, and the fuel tank and the battery are attached by a simple operation of attaching the mounting frame to which the fuel tank and the battery pack are attached to the lower surface of the vehicle body from below. Since the packs are mounted in a batch, the mounting process can be greatly shortened, and the mounting workability of the fuel tank and the battery pack is greatly improved.

  Further, the lower surfaces of the fuel tank and the battery pack are covered by the under cover, and aerodynamics associated with traveling are suppressed to improve traveling stability, and the fuel tank and the battery pack are protected from road surface interference and stepping stones.

It is a side view which shows the outline | summary of the vehicle body structure of the electric driving force vehicle which concerns on embodiment. It is a perspective view which shows the outline | summary of a fuel tank, a battery pack, and a mounting frame.

  Hereinafter, an embodiment of a vehicle body structure of an electric power vehicle according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view showing an outline of a vehicle structure of an electric driving force in the present embodiment, and FIG. 2 is a perspective view of a fuel tank, a battery pack, and a mounting frame. In addition, the arrow F in each figure shows a vehicle body front direction.

  As shown in FIG. 1, the vehicle body structure 1 rises from a front floor panel 11 that extends from a lower end portion of a toe board installed in a front portion of a passenger compartment to the vehicle body rear side, and a rear end portion of the front floor panel 11. A lower surface of the vehicle body having a kick-up portion 12 provided in this manner and a rear floor panel 13 extending rearward from the upper portion of the kick-up portion 12 is formed.

  A front-row vehicle seat composed of a driver seat and a passenger seat (not shown) is installed on the front floor panel 11, and a rear-row vehicle seat 18 is provided on the rear floor panel 13. A rear floor panel 13 is recessed downwardly behind the vehicle seat 18 to form a storage portion 14 made of a tire pan or the like.

  A pair of left and right rear frames (not shown) is provided behind the kick-up portion 12 so as to extend in the front-rear direction along both sides of the lower surface of the rear floor panel 13. Between the left and right rear frames, a front cross member 15 joined to the rear surface of the kick-up portion 12 and extending in the vehicle width direction to form a hollow cross-sectional structure along the rear surface of the kick-up portion 12, and a rear floor panel A rear cross member 16 extending in the vehicle width direction on the lower side of the vehicle 13 and on the rear side of the vehicle seat 18 and forming a hollow cross-sectional structure along the lower surface of the rear floor panel 13 is provided.

  A fuel tank 41 and a battery pack 42 are mounted on the front side of the concave space between the kick-up portion 12 and the storage portion 14 below the rear floor panel 12 via a mounting frame 20 to which an under cover 35 is attached. A differential device 40 that distributes and transmits the driving force from the propeller shaft to the left and right rear wheels W is disposed on the rear side.

  The mounting frame 20 and the under cover 35 will be described with reference to FIG. The mounting frame 20 includes a front beam member 21 and a rear beam member 25 that extend in the vehicle width direction so as to be separated from each other in the front-rear direction and extend in the vehicle width direction, and the front beam member 21 and the rear beam member 25. The outer front and rear beam members 31L and 31R and the inner front and rear beam members 32L and 32R having a hollow rectangular cross-sectional shape that are separated from each other and extend in the front and rear direction are spanned.

  The front beam member 21 has a hollow rectangular cross-sectional shape, and includes a central upper portion 22a extending in the vehicle width direction at the vehicle width direction central portion and left and right side portions 22b and 22c extending downward from both ends of the central upper portion 22a. A U-shaped or U-shaped raised portion 22 that opens downward, and left and right front-side extended portions 23L and 23R that extend in the vehicle width direction away from the lower ends of the side portions 22b and 22c of the raised portion 22. It is formed in the substantially hat shape provided with.

  The rear beam member 25 has the same shape as that of the front beam member 21, and includes a central upper portion 26a extending in the vehicle width direction and left and right side portions 26b and 26c extending downward from both ends of the central upper portion 26a. A U-shaped or U-shaped raised portion 26 that is open at the bottom, and left and right rear-side extending portions 27L that extend in the vehicle width direction away from the lower ends of the side portions 26b and 26c of the raised portion 26. 27R.

  The front end of the outer front / rear beam member 31L is coupled to the lower surface of the vehicle width direction outer end portion of the front extension portion 23L of the front beam member 21, and the rear end thereof is the rear extension portion 26L of the rear beam member 25. It is coupled to the lower surface of the outer end portion in the vehicle width direction and is bridged between the front beam member 21 and the rear beam member 25. The inner front / rear beam member 32L is spaced apart from the outer front / rear beam member 31L in the vehicle width direction, the front end is coupled to the lower surface of the vehicle width direction inner end portion of the front extending portion 23L of the front beam member 21, and the rear end is rear The front beam member 21 and the rear beam member 25 are spanned by being coupled to the lower surface of the inner end portion in the vehicle width direction of the rear extending portion 27L of the side beam member 25.

  A rectangular frame-shaped fuel tank mounting portion 33L is formed by the front extending portion 23L of the front beam member 21, the rear extending portion 27L of the rear beam member 25, the outer front and rear beam portions 31L, and the inner front and rear beam members 32L. .

  The outer front / rear beam member 31R has a front end coupled to a lower surface of the vehicle width direction outer end portion of the front extension portion 23R of the front beam member 21, and a rear end of the rear front beam member 25R of the rear extension portion 27R of the rear beam member 25. The front beam member 21 and the rear beam member 25 are connected to the lower surface of the outer end portion in the width direction. The inner front / rear beam member 32R is separated from the outer front / rear beam member 31R in the vehicle width direction, the front end is coupled to the lower surface of the vehicle width direction inner end portion of the front extension portion 23R of the front beam member 21, and the rear end is rear The front beam member 21 and the rear beam member 25 are spanned by being coupled to the lower surface of the inner end portion in the vehicle width direction of the rear extension 27R of the side beam member 25.

  A rectangular frame-shaped battery pack mounting portion 33R is formed by the front extending portion 23R of the front beam member 21, the rear extending portion 26R of the rear beam member 25, the outer front and rear beam portions 31R, and the inner front and rear beam members 32R. .

  Front-side mounting brackets 28L and 28R each having a front-side extension portion 23L and 23R of the front-side beam member 21 and bolts 28La and 28Ra for bolting to the lower surface of the front cross member 15 on the vehicle body side from below. Is provided. Similarly, rear mounting brackets 29L, 29R and 29Ra for bolting from the lower side to the lower surface of the rear cross member 16 from the lower side to the rear extension portions 27L and 27R of the rear beam member 25, 29R is provided.

  The under cover 35 has a U-shaped cross section having an upper surface 36a and both side surfaces 36b, 36c at the center in the vehicle width direction and extends in the front-rear direction, and the front end and the rear end are raised portions 22 of the front beam member 21. The fuel tank is formed in a substantially rectangular plate shape extending in the vehicle width direction away from the lower end edge of the side surfaces 36b and 36c of the raised surface 36 and the raised surface 36 that can be fitted into the raised portion 26 of the rear beam member 25 from below. A fuel tank cover portion 37L and a battery pack cover portion 37R that cover the mounting portion 33L and the battery pack mounting portion 33R from below are integrally formed.

  The fuel tank cover portion 37L has a front edge 37La projecting forward from the front extending portion 23L of the front beam member 21, the outer front and rear beam members 31L, and the front ends of the inner front and rear beam members 32L, and a rear edge 37Lb of the rear beam member 25. The rear extension 27L, the outer front and rear beam members 31L, and the rear ends of the inner front and rear beam members 32L protrude rearward, and the side edge 37Lc is the rear extension 23L of the front beam member 21 and the rear side of the rear beam member 25. Projecting outward in the vehicle width direction from the side ends of the extending portion 27L and the outer front and rear beam members 31L, the lower surface is formed smoothly from the front edge 37La to the rear edge 37Lb.

  On the other hand, the battery pack cover portion 37R has a front edge 37Ra projecting forward from the front extending portion 23R of the front beam member 21, the outer front and rear beam members 31R, and the front ends of the inner front and rear beam members 32R, and the rear edge 37Rb being the rear beam. The rear extending portion 27R of the member 25, the outer front / rear beam member 31R, and the rear end of the inner front / rear beam member 32R protrude rearward, and the side edge 37Rc of the front beam member 21 of the front extending portion 23R The rear extending portion 27R and the outer front and rear beam members 31R protrude outward in the vehicle width direction, and the lower surface is formed smoothly from the front edge 37Ra to the rear edge 37Rb.

  The under cover 35 formed in this way has a front portion and a rear portion of the raised surface 36 fitted into the lower surface of the raised portion 22 of the front beam member 21 and the raised portion 26 of the rear beam portion 25 from below, such as a bolt. And the fuel tank cover portion 37L is coupled to the lower surfaces of the outer front and rear beam members 31L and 32L from below with bolts or the like, and the battery puncture cover portion 37R is connected to the outer front and rear beam members 31R and 32R. The lower surface of the mounting frame 20 is coupled to the lower surface by bolts or the like from below.

  In attaching the mounting frame 20 with the under cover 35 attached to the vehicle body in this manner, the front extension portion 23L of the front beam member 21 and the rear beam member 25, for example, on the fuel tank mounting portion 33L of the mounting frame 20 in advance. A fuel tank 41 is mounted over the rear extension 27L and is bolted to the front extension 23L and the rear extension 27L, or is connected to the front extension 23L and the rear extension 27L. It is fixed with a metal long member passed. On the other hand, the battery pack 42 is mounted on the battery pack mounting portion 33R, for example, over the front extending portion 23R of the front beam member 21 and the rear extending portion 27R of the rear beam member 25, and the front extending portion 23R. And it fixes to the back side extension part 27R with a volt | bolt coupling | bonding or the metal elongate member spanned between the front side extension part 23R and the back side extension part 27R.

  In this way, the mounting frame 20 in which the battery pack 42 is fixed to the side of the fuel tank 41 and the fuel tank 41 is arranged between the kick-up portion 12 and the housing portion 14 from below the vehicle body as indicated by a virtual line in FIG. The mounting portion 28La of the front mounting bracket 28L and the mounting portion 28Ra of the front mounting bracket 28R are brought into contact with the lower surface of the front cross member 15, and the mounting portion 29La and the rear side of the rear mounting bracket 29L are inserted so as to fit into the space. The mounting portion 29Ra of the mounting portion 29R is brought into contact with the lower surface of the rear cross member 16 to position the mounting frame 20 with respect to the vehicle body 1.

  Thereafter, the mounting portions 28La and 28Ra of the front mounting brackets 28L and 28R are bolted to the lower surface of the front cross member 14, and the mounting portions 29La and 29Ra of the rear mounting brackets 29L and 29R are connected to the lower surface of the rear cross member 15. The mounting frame 20 is attached by bolting to the mounting frame 20.

  Thus, the mounting frame 20 is bridged from below to the front cross member 15 to which the kick-up portion 12 is joined on the lower side of the rear floor panel 13 and the rear cross member 16 provided on the lower side of the rear floor panel 13. As a result, the fuel tank 41 and the battery pack 42 are arranged in the space below the rear floor panel 13 behind the kick-up portion 12.

  In this manner, the fuel tank 41 and the battery pack 42 are fixed to the side of the fuel tank 41 in advance on the mounting frame 20 having the under cover 35 attached to the lower surface, and the mounting frame 20 to which the fuel tank 41 and the battery pack 42 are attached is mounted. By a simple operation of attaching to the front cross member 15 and the rear cross member 16 from below from below, the fuel tank 41 and the battery pack 42 can be mounted simultaneously, that is, collectively mounted, and the mounting process can be greatly shortened. The mounting workability of the tank 41 and the battery pack 42 is greatly improved.

  Further, the lower surface of the fuel tank 41 and the battery pack 42 is covered by the under cover 35 so as to be continuous from the rear end of the front floor panel 11, the lower surface of the vehicle body is smoothed, and the airflow under the floor accompanying traveling is rectified. The aerodynamics are suppressed and the running stability can be improved. Further, the fuel tank 41 and the battery pack 42 are protected from road surface interference and stepping stones by the under cover 35.

  In addition, an arrangement space for a propeller shaft, an exhaust pipe, and the like is formed below by the raised portion 22 of the front beam member 21, the raised portion 26 of the rear beam member 25, and the raised surface 36 of the under cover 35. The fuel tank 41 and the battery pack 42 are protected from the heat of the exhaust pipe by the heat shielding effect of the under cover 35 by being disposed below the surface 35.

  Further, the vehicle body structure from which the mounting frame 20 is removed is not changed from the vehicle body structure using the engine as a travel drive source, and a relatively large fuel tank can be mounted instead of the mounting frame 20 so that the engine can run. The vehicle body can be shared with the vehicle as the drive source.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of invention. For example, in the above embodiment, the fuel tank mounting part is formed on the left side of the mounting frame 20 and the battery pack mounting part is formed on the right side, but the fuel tank mounting part is formed on the right side and the battery pack mounting part is formed on the left side. You can also. The raised portions 22 and 26 are formed at the center in the vehicle width direction of the front beam member 21 and the rear beam member 25, and the raised surface 36 is formed on the under cover 35. However, the front beam member 21 and the rear beam member 25 are straightened. The under cover 35 can be formed into a flat plate shape.

  Further, a beam member extending in the vehicle width direction can be disposed between the front beam member 21 and the rear beam member 25, or front and rear beam members extending in the front-rear direction can be additionally disposed.

DESCRIPTION OF SYMBOLS 1 Vehicle body structure 11 Front floor panel 12 Kick-up part 13 Rear floor panel 14 Storage part 15 Front side cross member 16 Rear side cross member 18 Vehicle seat 20 Mounting frame 21 Front side beam member (beam width direction beam member)
22 Raised parts 23L, 23R Front side extension part (extension part)
25 Rear beam members (beam members in the vehicle width direction)
26 Raised parts 27L, 27R Rear extension part (extension part)
31L, 31R Outside front and rear beam members (front and rear beam members)
32L, 32R Inner front and rear beam members (front and rear beam members)
33L Fuel tank mounting portion 33R Battery pack mounting portion 35 Under cover 36 Raised surface 37L Fuel tank cover portion 37R Battery pack cover portion 41 Fuel tank 42 Battery pack

Claims (3)

A plurality of front and rear beam members that are separated from each other in the vehicle width direction and extend along the longitudinal direction of the vehicle body, and a pair of vehicle width directions that are connected to the front and rear ends of the plurality of front and rear beam members and extend in the vehicle width direction A mounting frame comprising beam members;
An under cover for covering the lower part of the mounting frame;
An electric power vehicle characterized in that a fuel tank is fixed on the mounting frame, a battery pack is fixed on the mounting frame and on a side of the fuel tank, and the mounting frame is attached to a lower surface of a vehicle body. Body structure. Each vehicle width direction beam member,
U-shaped or U-shaped bulges that are open at the bottom;
An extending portion extending in the vehicle width direction away from each lower end of the raised portion,
The plurality of front and rear beam members are:
Outer front and rear beam members whose front and rear ends are joined to outer end portions in the vehicle width direction of the extending portions of the respective beam width direction beam members facing each other;
An inner front and rear beam member having front and rear ends joined to the vehicle width direction outer end portion of each extending portion of each of the vehicle width direction beam members facing each other,
A fuel tank mounting portion and a battery pack mounting portion are formed by the pair of extending portions and the outer front and rear beam members and the inner beam member on both sides of each raised portion,
The under cover is
A raised surface extending in the longitudinal direction of the vehicle body in a U-shape or U-shape that is fitted into each raised portion from below and opened downward, and extends in the vehicle width direction away from each lower end of the raised surface. The vehicle body structure for an electric power vehicle according to claim 1, further comprising a fuel tank cover portion and a battery pack cover portion that cover the fuel tank mounting portion and the battery pack mounting portion from below. The lower surface of the vehicle body is
A front floor panel, a kick-up portion provided so as to rise from the rear end of the front floor panel, and a rear floor panel extending rearward from the upper portion of the kick-up portion,
2. The mounting frame is assembled by being bridged from below to a front cross member joined to the kick-up portion and a rear cross member provided on the lower side of the rear floor panel. Or a vehicle body structure of an electric power vehicle according to 2;

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