JP2013147137A - Floor structure of electrically driven vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor structure of an electrically driven vehicle which is capable of reducing weight and cost of a vehicle body.SOLUTION: A pair of side members (11) are arranged to be extended in the front and back direction of a vehicle body in under sides of right and left both side parts of a vehicle body and further a pair of side sills (13) are arranged in a vehicle width directional outside of the pair of side members (11). A pair of floor panels (14) are joined to surfaces of the vehicle body width direction inside of a pair of the side sills (13) and a backbone reinforcement (15) is jointed to a dash panel (18) and a rear floor panel (19). A pair of cross members (16) are joined to a pair of the side sills (13). A battery pack (12) is screwed to the side member (11) via an attachment part (12b) from an under side of the vehicle body and the upper part of the battery pack (12) is screwed to the backbone reinforcement (15) and a pair of the cross members (16).

Description

  The present invention relates to a floor structure of an electric vehicle.

The battery pack of an electric vehicle is increased in size in order to make the travel distance by the motor as long as possible. And since the battery pack becomes heavier due to the upsizing, in order to improve the drivability of the vehicle and to prevent damage to the battery pack in the event of a vehicle collision, That is, it is fixed to the lower side of the passenger compartment where the driver gets on.
A floor panel that is joined to a pair of left and right side sills that form a floor at the lower part of the passenger compartment is disposed at the upper part of the battery pack. (Patent Document 1).

JP 2009-143446 A

In the floor structure of Patent Document 1, a floor panel is arranged on the upper part of the battery pack to partition the vehicle interior from the vehicle interior. Therefore, a large floor panel is required to form the floor below the passenger compartment.
However, the floor panel is formed of a thin metal plate, and using a large floor panel is not preferable because it leads to an increase in the weight of the vehicle body and an increase in cost.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a floor structure of an electric vehicle that can reduce the weight and cost of a vehicle body.

  In order to achieve the above object, in the floor structure of an electric vehicle according to claim 1, a battery pack disposed at a lower portion of a vehicle body of the vehicle, and disposed at front and rear and left and right of the vehicle body to form the vehicle body. In a floor structure of an electric vehicle including a vehicle body component and a floor panel that forms a lower part of a passenger compartment, the floor panel is divided, and a lower part of the passenger compartment is formed together with an upper part of the battery pack, and a strength member The strength member is disposed in the vehicle body width direction and the vehicle body front-rear direction of the vehicle body constituting member.

  Further, in the floor structure of the electric vehicle according to claim 2, in claim 1, the strength member disposed in the vehicle body width direction of the vehicle body constituting member is a cross member for fixing a seat provided in the vehicle body, The said strength member arrange | positioned in the vehicle body front-back direction of a vehicle body structural member is a backbone phosphorus hose extended in the vehicle body front-back direction and arrange | positioned in the center part of the vehicle body width direction.

  According to a floor structure of an electric vehicle according to a third aspect, in the first or second aspect, the battery pack includes a pair of left and right side members that extend in the front-rear direction of the vehicle body and are disposed in parallel to the lower side of the vehicle body. It is arrange | positioned between, Furthermore, it fixes to the said strength member, It is characterized by the above-mentioned.

In the invention of claim 1, the floor panel is divided, the lower part of the vehicle compartment is formed together with the upper part of the battery pack, and the strength members are arranged in the vehicle body width direction and the vehicle body longitudinal direction of the vehicle body constituting member. The member can secure the rigidity of the vehicle body, and the floor panel forming the lower part of the passenger compartment can be made small.
Therefore, since the floor panel can be made small, the weight and cost of the vehicle body can be reduced.

Further, in the invention of claim 2, the backbone phosphorus hose and the cross member provided in the vehicle body are used as the strength member, and it is not necessary to newly provide the strength member. Therefore, the rigidity of the vehicle body is suppressed while suppressing an increase in cost. Can be secured.
In the invention of claim 3, the battery pack is disposed between the pair of left and right side members, and the upper part of the battery pack is fixed to the strength member, so that the battery pack can be used as the strength member. Therefore, the plate thickness of the side member can be reduced.

  Therefore, the weight and cost of the vehicle body can be further reduced by reducing the plate thickness of the side member.

It is a perspective view of the floor part of the vehicle to which the floor structure of the electric vehicle of this invention is applied. It is a top view of the floor part of the vehicle to which the floor structure of the electric vehicle of the present invention is applied. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the configuration of the floor structure of the electric vehicle according to the present invention will be described.
FIG. 1 is a perspective view of a vehicle floor portion to which the floor structure of an electric vehicle of the present invention is applied, and FIG. 2 is a top view of the floor portion of the vehicle to which the floor structure of the electric vehicle of the present invention is applied. A two-dot chain line in FIG. 2 indicates a seal member that prevents intrusion of water or the like into the vehicle interior. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB in FIG. In each figure, the arrow “front” indicates the vehicle body front direction, the arrow “lateral” indicates the vehicle body width direction, and the arrow “up” indicates the vehicle body upward direction.

As shown in FIGS. 1 to 4, a lower part of a passenger compartment of an electric vehicle (hereinafter referred to as a vehicle) 10 includes a pair of side members 11, a battery pack 12, a pair of side sills (vehicle body constituent members) 13, and a pair. The floor panel 14, the backbone phosphorus hose 15, and a pair of cross members 16.
The pair of side members 11 is a skeleton member of a vehicle body that has a hat shape in cross section when viewed from the rear of the vehicle body and is formed to extend in the vehicle body front-rear direction.

  The battery pack 12 stores power by receiving power supplied to a motor that drives the vehicle 10 and power supplied from an external charger. The battery pack 12 has a convex cross-sectional shape in which a central portion in the vehicle body width direction protrudes upward in the vehicle body when viewed from the rear of the vehicle body, and is formed to extend in the vehicle body front-rear direction. In addition, a seal member 12 a is provided on the upper surface of the battery pack 12 to prevent water and the like from entering the vehicle compartment. Further, a plurality of attachment portions 12 b for screwing the battery pack 12 to the pair of side members 11 with bolts 17 are provided on the lower side of the battery pack 12 in the vehicle body width direction.

The pair of side sills 13 are vehicle body components that form a vehicle body that has a hat shape in cross section when viewed from the rear of the vehicle body and extends in the longitudinal direction of the vehicle body.
The pair of floor panels 14 are thin plates and have an L-shaped cross section when viewed from the rear of the vehicle body, and are formed in a rectangular shape whose longitudinal direction in the vehicle body is longer than the vehicle body width direction when the vehicle body is viewed from above.
The backbone phosphorus hose 15 is a thin plate, has a substantially M-shaped cross section when viewed from the rear of the vehicle body, and is formed to extend in the longitudinal direction of the vehicle body.

  The pair of cross members 16 have a hat shape in cross section when viewed in the vehicle body width direction, and are formed in a substantially convex shape protruding in the vehicle body upper side direction when viewed from the rear of the vehicle body. Further, in the vehicle body lower direction of the pair of cross members 16, a clearance portion is formed so as to form a space toward the vehicle body upper side in order to prevent contact with the backbone phosphorus hose 15 when the pair of cross members 16 are assembled to the vehicle body. 16a is provided, and a seat surface 16b projecting downward in the vehicle body is provided at a portion screwed by the bolt 17, and is formed so as to follow the backbone phosphorus hose 15 having a substantially M-shaped cross section.

  These constituent members extend in the longitudinal direction of the vehicle body in the left and right lower sides of the vehicle body so that the pair of side members 11 has a hat-shaped opening in the cross section of the pair of side members 11 in the vehicle upper direction. Are respectively arranged. Further, the pair of side sills 12 are respectively arranged so that the opening having a hat-shaped cross section is in the vehicle body outer side direction, and extends in the vehicle body front-rear direction on the vehicle body width direction outer side of the pair of side members 11. . The pair of floor panels 14 are joined to the inner side surface of the pair of side sills 13 on the short side of the L-shaped cross section so that the long side surface of the L-shaped cross section faces the lower side of the vehicle body. The Further, the backbone phosphorus hose 15 is joined to a dash panel (vehicle body constituent member) 18 having a front end portion of the vehicle body and a rear floor panel (vehicle body constituting member) 19 constituting a vehicle body at a rear end portion of the vehicle body. The pair of cross members 16 are welded and joined to the front and rear of the vehicle body inside the pair of side sills 13 in the vehicle width direction. The battery pack 12 is in contact with the pair of floor panels 14, the dash panel 18 and the rear floor panel 19 by bolts 17 from below the vehicle body via the mounting portion 12b of the battery pack 12 so as to be sealed by the seal member 12a. Screwed onto the side member 11. Further, the upper portion of the battery pack 12 is screwed to the pair of cross members 16 with bolts 17 via a seating surface 16b projecting downward from the vehicle body provided on the backbone ring hose 15 or the cross member 16 on the backbone link hose 15. Combined.

Hereinafter, the operation and effect of the floor structure of the electric vehicle according to the present invention configured as described above will be described.
In this way, the floor panel 14 is divided into two parts, and the lower part of the passenger compartment is formed by the upper part of the battery pack 12 and the pair of floor panels 14. The backbone phosphorus hose 15 is disposed on the front and rear of the vehicle body and joined to a dash panel 18 and a rear floor panel 19 constituting the vehicle body, and a pair of cross members 16 are joined to a pair of side sills 13 constituting the vehicle body. Further, the upper part of the battery pack 12 is screwed with the backbone phosphorus hose 15 and the pair of cross members 16.

  Therefore, the backbone ring hose 15 is joined to the dash panel 18 and the rear floor panel 19, and the pair of cross members 16 are joined to the inside of the pair of side sills 13 in the vehicle width direction to ensure the strength of the vehicle body. By using the upper part as the lower part of the passenger compartment, the floor panel 14 can be made smaller, and the weight and cost of the vehicle body can be reduced.

Further, since the backbone phosphorus hose 15 and the pair of cross members 16 provided in the vehicle body are used to ensure the rigidity of the vehicle body, it is not necessary to newly provide a strength member, so that the increase in cost is suppressed while ensuring the rigidity of the vehicle body. can do.
Further, since the battery pack 12 is disposed between the pair of left and right side members 11 and the upper part of the battery pack 12 is screwed into the backbone ring hose 15 and the pair of cross members 16, the battery pack 12 is used as a strength member. Since it can utilize, the plate | board thickness of the side member 11 can be reduced.

DESCRIPTION OF SYMBOLS 10 Vehicle 11 Side member 12 Battery pack 13 Side sill (vehicle body structural member)
14 Floor panel 15 Backbone ring hose 16 Cross member 18 Dash panel (body component)
19 Rear floor panel (body component)

Claims (3)

A battery pack disposed at the bottom of the vehicle body;
A vehicle body constituting member disposed on the front and rear and on the left and right of the vehicle body to form the vehicle body;
In a floor structure of an electric vehicle comprising a floor panel that forms a lower part of a passenger compartment,
Dividing the floor panel, forming the lower part of the passenger compartment together with the upper part of the battery pack;
A floor structure for an electric vehicle, further comprising a strength member, wherein the strength member is disposed in a vehicle body width direction and a vehicle body longitudinal direction of the vehicle body constituent member. The strength member disposed in the vehicle body width direction of the vehicle body component member is a cross member for fixing a seat provided in the vehicle body;
The said strength member arrange | positioned in the vehicle body front-back direction of the said vehicle body structural member is a backbone phosphorus hose extended in the vehicle body front-back direction and arrange | positioned in the center part of the vehicle body width direction. The floor structure of the electric vehicle as described in 2.   The battery pack is disposed between a pair of left and right side members that extend in the front-rear direction of the vehicle body and is disposed in parallel to the lower side portion of the vehicle body, and is further fixed to the strength member. The floor structure of the electric vehicle according to claim 1 or 2.

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