JP3529008B2 - Reinforcement structure for battery tray mounting part of electric vehicle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery tray mounting portion reinforcing structure for an electric vehicle.

[0002]

2. Description of the Related Art In recent years, electric vehicles have been provided as pollution-free vehicles that emit neither exhaust gas nor noise. A large number of batteries and the like are used in this electric vehicle, and these batteries are mounted on a battery tray. Both left and right ends of the battery tray are attached to side frames 51 as shown in FIGS. 10 and 11, and the side frames 51 are arranged on both left and right sides of the lower portion of the vehicle body. For this reason, a square pipe having a closed cross-section is used for the side frame 51, and the caulking nut 5 is attached to the lower surface of the pipe.
2 and a welding nut 53 are attached. That is, the crimp nut 52 is mounted on the side frame 51 from the outside.
It is fixed to the lower surface of the side frame 51 by being press-fitted into the mounting hole 54 formed in the lower part of the side and caulking. Further, the welding nut 53 has a mounting hole 56 in which a plate-shaped body 55 provided with the welding nut 53 is drilled from the outside to the lower portion of the side frame 51.
It is fixed to the lower surface of the side frame 51 by inserting it into the base plate and welding the periphery of the overlapped part.

On the other hand, since a battery tray having a large number of batteries mounted therein is heavy in weight, reinforcing plates 57 and 58 shown in FIGS. 10 and 11 are attached to the side frame 51 which supports the battery tray. The reinforcing plate 57 shown in FIG. 10 has a size corresponding to that of the side frame 51, and is formed in a substantially U-shaped cross section with the opening portion arranged downward, and is fitted to the upper outer side of the side frame 51. Then, the periphery of the overlapped portion is fixed by welding. Further, the reinforcing plate 5 shown in FIG.
8 is a size corresponding to the side frame 51,
It is formed in a substantially L-shaped cross section with the right-angled portion facing downward, and is fitted to the upper outside of the side frame 51,
It is fixed by welding the periphery of the overlapping portion. In the figure, W is a welded portion.

[0004]

However, in the above-mentioned conventional reinforcing structure, since the side frame 51 is formed in a closed cross-sectional shape using a square pipe or the like, it is difficult to attach the welding nut 53 to the lower surface thereof. The nut installation work was complicated. Further, when the crimping nut 52 is used, since the battery tray on which the battery is mounted is a heavy object, there is a possibility that the strength is insufficient to support the battery tray. On the other hand, for the side frame 51 having a closed cross-sectional shape using a square pipe or the like,
There is a demand to add a nut for battery tray mounting and a reinforcing structure, and to keep the external shape as little as possible before the addition. That is, considering that a gasoline car and an electric car are produced on the same line, the parts such as the caulking nut 52 and the reinforcing plates 57 and 58 are projected to the outside of the side frame 51 due to common use of equipment such as a carrier and a jig. I wanted to avoid things as much as possible.

The present invention has been made in view of such an actual situation, and an object thereof is to attach a nut for attaching a battery tray as compared with a conventional reinforcing structure without changing the external shape of the side frame. It is an object of the present invention to provide a battery tray mounting portion reinforcing structure for an electric vehicle, which can improve the workability of assembling and the like, the mounting strength, and the rigidity of the side frame.

[0006]

In order to solve the above-mentioned problems of the prior art, the present invention provides a floor pad for a vehicle body.
Formed in a vertically long closed cross section on the left and right sides of the bottom of the flannel.
Corner pipe side frames used disposed respectively, in the battery tray mounting portion reinforcing structure of an electric vehicle mounting the opposite ends of the battery tray battery to the side frame is mounted, in the interior of the side frame, wherein Inner walls on top of the side frame and on both left and right sides
Contact with the surface, the reinforcing member of closed section which nut bracket portion comprising an attachment portion is fixed to the battery tray disposed, are integrally joined with said side frame and the reinforcing member.

According to another aspect of the present invention, the flow of the vehicle body is
The left and right sides of the lower portion of the rear panel, forming the closed cross section of the longitudinal
In the battery tray mounting portion reinforcing structure of the electric vehicle, in which the side frames using the square pipes are arranged, and both end portions of the battery tray in which the battery is mounted are attached to the side frames, inside the side frame, Stacked in the vertical direction, the side frame
Reinforcement part that abuts the inner wall surfaces of the upper part and both left and right sides of the
Material and a bracket with nuts fixed to the battery tray mounting portion, and the upper wall surface of the upper reinforcing member.
A pair of upper and lower reinforcing members of a lower reinforcing member fixed to the lower wall surface are arranged, and the reinforcing member and the side frame are integrally joined.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on the illustrated embodiments.

1 to 7 show an embodiment of a battery tray mounting portion reinforcing structure for an electric vehicle according to the present invention. In the figure, reference numeral 1 denotes an electric vehicle having a frame structure to which the battery tray mounting portion reinforcing structure of the present embodiment is applied.
Center side frames 3 extending in the front-rear direction of the vehicle body are arranged on both the left and right sides of the vehicle body at intervals. As shown in FIGS. 3 and 4, these side frames 3 are
Both left and right end portions 4a of the battery tray 4 are attached, and on the upper portion of the battery tray 4, a large number of batteries 5 which are power sources of an AC motor or a DC motor as a power source of the electric vehicle 1 are arranged in front, rear, left and right. It is mounted so that a large number of batteries 5 are arranged between the two side frames 3.

As shown in FIGS. 5 to 7, a rectangular pipe having a vertically long closed cross-section is used for the side frame 3, and the lower wall surface 3a thereof serves as a mounting portion for the battery tray 4. A plurality of mounting holes 7 into which the tightening bolts 6 are inserted are formed at intervals in the vehicle body front-rear direction. Further, on the left and right side wall surfaces 3b of the side frame 3,
A plurality of through holes 8 for welding the plugs are provided at intervals in the front-rear direction of the vehicle body. Moreover, a reinforcing member (lean force) 9 and a bracket 10 with a nut that extend in the vehicle body front-rear direction are arranged inside the side frame 3.

As the reinforcing member 9, a square pipe having a closed cross-section and having a size that abuts on the inner wall surfaces of the upper portion and the left and right side portions of the side frame 3 is used. Brackets 10 with nuts are mounted at intervals in the front-rear direction of the vehicle body in correspondence with the mounting holes 7 of the side frame 3. Further, the left and right side portions of the reinforcing member 9 are provided inside the side frame 3 and the welding portions 11 are provided by plug welding the portions of the through holes 8, and the reinforcing member 9 is provided through these welding portions 11. The side frame 3 and the side frame 3 are integrally fixed.

The nut-equipped bracket 10 is formed in a U-shaped cross section using a single plate-like body, and flange portions 10a are formed at the front and rear upper ends of the bracket 10 and are bent outward. In the nut-equipped bracket 10, the flange portion 10a is fixed on the lower surface of the reinforcing member 9 in an overlapping manner.
The intermediate portion 10b in the front-rear direction is formed at a height position where it abuts the lower inner wall surface of the side frame 3 while being arranged inside the side frame 3. Further, on the upper surface of the intermediate portion 10b of the nut-equipped bracket 10, a welding nut 12 for attaching the battery tray, which is screwed with the tightening bolt 6, is attached.
Are fixed together. For this reason, bolt holes 13 are formed in the intermediate portion 10b of the bracket 10 with nuts in correspondence with the mounting holes 7 of the side frame 3, and the tightening bolts 6 are inserted through the mounting holes 7 and the bolt holes 13. It is adapted to be screwed into the welding nut 12.

On the other hand, the battery tray 4 has a concave portion in the middle portion for accommodating the battery 5, and the left and right end portions 4a thereof are raised and bent outward. A plurality of insertion holes 14 corresponding to the mounting holes 7 of the side frame 3 are formed in the left and right ends 4a of the battery tray 4 at intervals in the front-rear direction of the vehicle body, and the insertion holes 14 are tightened. It is configured to insert the bolt 6. In addition,
In FIG. 3, 15 is a side sill and 16 is a side door.

In the reinforcing structure of the present embodiment, the reinforcing member 9 to which the bracket 10 with a nut is attached is inserted into the side frame 3 to be arranged at a predetermined position, and plug welding is performed to connect the reinforcing member 9 to the reinforcing member 9. The side frame 3 is fixed. Then, the left and right end portions 4a of the battery tray 4 are superposed on the lower surface of the side frame 3, and the tightening bolt 6 is inserted through the insertion hole 14, the mounting hole 7 and the bolt hole 13 so that the welding nut 12 of the nut-equipped bracket 10 is inserted. When tightened by screwing, the battery tray 4 is fixed to the side frame 3.

In the reinforcing structure of this embodiment, the reinforcing member 9
And a bracket 10 with a nut to which a welding nut 12 for mounting a battery tray is fixed are integrated, and the reinforcing member 9 and the bracket 10 with a nut having these integrated structures are inserted and arranged inside the side frame 3, and a tightening bolt is provided. Since the left and right ends 4a of the battery tray 4 are fixed to the lower surface of the side frame 3 by tightening 6 and the welding nut 12, the assembling workability is improved. Also, the reinforcing member 9
The nut-equipped bracket 10 is disposed inside the side frame 3 and does not appear on the outside of the side frame 3, so that the external shape of the side frame 3 is almost unchanged. Further, since the welding nut 12 for mounting the battery tray is mounted on the lower wall surface 3a of the side frame 3 and the upper surface of the intermediate portion 10b of the nut-equipped bracket 10, the welding nut 12 for mounting the battery tray has a smaller size than the conventional one. The mounting strength can be improved. In addition, inside the side frame 3 having a closed cross section,
Since the reinforcing member 9 further provides a closed cross section, a reinforcing structure having higher strength than the conventional reinforcing structure can be obtained.

FIGS. 8 and 9 show another embodiment of the battery tray mounting portion reinforcing structure for an electric vehicle according to the present invention. The same members as those of the above-mentioned invention are designated by the same reference numerals and their description is omitted. To do. In the embodiment of the present invention, a pair of upper and lower reinforcing members 29 and 30 which are vertically stacked are arranged inside the side frame 3. As the pair of upper and lower reinforcing members 29 and 30, square pipes extending in the vehicle front-rear direction and having a closed cross-sectional shape are used.
And has the same size and arrangement. On the other hand, the lower reinforcing member 30 corresponds to the bracket 10 with a nut of the above invention, but its upper wall surface 30a is fixed to the lower wall surface 29a of the upper reinforcing member 29.

Further, a plurality of plate-like brackets 31 with nuts are attached to the lower wall surface 30b of the lower reinforcing member 30 at intervals in the vehicle front-rear direction corresponding to the attachment holes 7 of the side frame 3, A welding nut 12 for attaching the battery tray, which is screwed with the tightening bolt 6, is integrally fixed to the upper surface of the plate-shaped bracket 31. For this reason, the lower wall surface 30b of the lower reinforcing member 30 is provided with an insertion hole 32 into which the welding nut 12 is inserted, and the central portion of the plate-shaped bracket 31 corresponds to the mounting hole 7 of the side frame 3 and the bolt hole 1.
3 is provided so that the tightening bolt 6 can be screwed into the welding nut 12 through the mounting hole 7 and the bolt hole 13. Other configurations and assembling procedures are almost the same as those of the above-described embodiment of the invention.

In the reinforcing structure of the present embodiment, a pair of upper and lower reinforcing members 29 and 30 and a plate bracket 31 with a nut to which the welding nut 12 for mounting the battery tray is fixed are integrated. The reinforcing members 29, 30 and the plate-shaped bracket 31 with the nut are inserted and arranged inside the side frame 3, and the tightening bolt 6 and the welding nut 12 are arranged.
The left and right ends 4 of the battery tray 4 by tightening
Since a is fixed to the lower surface of the side frame 3, two upper and lower closed cross sections are further provided inside the side frame 3 having a closed cross section by the pair of upper and lower reinforcing members 29 and 30.
The strength of the side frame 3 can be further increased as compared with the reinforcing structure according to the above-described embodiment of the invention.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention. is there. For example, in the above-described embodiment, the side frame 3 and the reinforcing member 9 are fixed to each other by plug welding, but the side frame 3 and the reinforcing member 9 may be fixed to each other by using a fixing means such as a rivet.

[0020]

As described above, the reinforcing structure for the battery tray mounting portion of the electric vehicle according to the present invention is applied to the floor panel of the vehicle body.
Corners with a vertically long closed cross-section on the left and right sides of the bottom of the
Arrange the side frames using pipes ,
Attaching both ends of a battery tray on which a battery is mounted to the side frame, wherein the side frame has an upper portion and left and right sides inside the side frame.
A reinforcing member having a closed cross-section, which is in contact with the inner wall surface of the portion and is fixed to a bracket with a nut, at a location that serves as a mounting portion of the battery tray, and integrally joins the reinforcing member and the side frame. Therefore, as compared with the conventional reinforcing structure, the work of assembling the nut for the battery tray and the like can be performed more quickly, and the mounting strength thereof can be improved. Further, in the battery tray mounting portion reinforcing structure of the present invention, since the reinforcing member and the bracket with nut are not exposed on the outside of the side frame, the external shape of the side frame is almost unchanged, and the gasoline vehicle and the electric vehicle are in the same line. Even in the case of production in, it becomes possible to share equipment such as a carrier and a jig, and the production equipment can be used efficiently. Moreover, inside the side frame,
Since the closed cross section is further provided by the reinforcing member having the closed cross section, it is possible to obtain a reinforcing structure having higher strength than the conventional reinforcing structure.

In addition, another structure for reinforcing the battery tray mounting portion of the electric vehicle according to the present invention is the bottom panel of the vehicle body.
The left and right sides of the parts, angular pie formed closed cross section of the longitudinal
Flop side frames used disposed respectively, there is mounting both ends of the battery tray battery to the side frame is mounted, in the interior of the side frame, superimposed vertically, the side Frey
Reinforcement that abuts the inner wall surfaces of the upper and left and right sides
A bracket with a nut is fixed to a member and a location that becomes an attachment portion of the battery tray, and an upper wall surface is the upper reinforcing member.
Since a pair of upper and lower reinforcing members of a lower reinforcing member fixed to the lower wall surface of the lower reinforcing member are arranged and the reinforcing member and the side frame are integrally joined, the same effect as that of the above-described invention can be obtained. In addition to being obtained, the rigidity of the reinforcing structure can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electric vehicle to which a battery tray mounting portion reinforcing structure according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view showing a vehicle body frame according to the electric vehicle of the present embodiment.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a perspective view showing a battery tray equipped with a battery.

FIG. 5 is a perspective view showing a state before disposing a reinforcing member and a bracket with a nut inside the side frame.

FIG. 6 is a perspective view showing a state in which a reinforcing member and a bracket with a nut are inserted inside the side frame.

7 is a sectional view taken along line BB in FIG.

FIG. 8 is a perspective view showing a reinforcing member and a plate-like bracket with a nut in a battery tray mounting portion reinforcing structure according to another embodiment of the present invention.

9 is a cross-sectional view showing a state in which the reinforcing member and the plate-shaped bracket with nut in FIG. 8 are arranged inside the side frame.

FIG. 10 is a cross-sectional view showing a conventional battery tray mounting portion reinforcing structure of a side frame.

FIG. 11 is a cross-sectional view showing another conventional battery tray mounting portion reinforcing structure of a side frame.

[Explanation of symbols]

1 electric car 3 Center side frame 4 battery tray 5 battery 6 Tightening bolt 7 mounting holes 8 through holes 9, 29, 30 Reinforcing member Bracket with 10 nuts 11 welds 12 Weld nut 13 bolt holes 14 insertion holes 31 Plate-shaped bracket with nut 32 Insert hole

Claims (2)

(57) [Claims] 1. A rectangular pipe having a vertically long closed cross-section is used on both left and right sides of a lower portion of a floor panel of a vehicle body.
In a battery tray mounting portion reinforcing structure for an electric vehicle, in which both side frames are provided, and both ends of a battery tray on which a battery is mounted are mounted, the side frame is provided inside the side frame.
A reinforcing member having a closed cross-section, which is in contact with the inner wall surfaces of the upper part and the left and right side parts of the battery tray, and a bracket with a nut is fixed to the mounting portion of the battery tray, and the reinforcing member and the side frame are integrated. A structure for reinforcing a battery tray mounting portion of an electric vehicle, which is characterized by being joined physically. 2. Square pipes having a vertically long closed cross section are used on both left and right sides of a lower portion of a floor panel of a vehicle body.
In a battery tray mounting portion reinforcing structure of an electric vehicle in which both side frames are provided, and both ends of a battery tray in which a battery is mounted are mounted on the side frames, the side frames are vertically overlapped with each other. The upper part of the side frame and the left and right side parts
An upper reinforcing member that comes into contact with the inner wall surface and a bracket with a nut are fixed to a portion that serves as a mounting portion of the battery tray ,
A lower auxiliary member whose upper wall is fixed to the lower wall of the upper reinforcing member.
A reinforcing structure for a battery tray mounting portion of an electric vehicle, characterized in that a pair of upper and lower reinforcing members of a strong member having a closed cross-sectional shape are arranged, and the reinforcing member and the side frame are integrally joined.