JP3114484B2 - Battery frame mounting structure for electric vehicles - 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 frame mounting structure for an electric vehicle.

[0002]

2. Description of the Related Art In an electric vehicle, a vehicle-mounted battery occupies a considerable weight and mounting space. Therefore, conventionally, a dedicated rigid-structured battery frame is disposed below a floor panel, and the battery frame is mounted on the battery frame. A plurality of batteries are mounted, and the batteries are stored between a floor panel and a battery frame.

Referring to FIG. 6, reference numeral 1 denotes a floor panel, and a pair of side members 2 on its lower surface.
A plurality of cross members 3 extend over these side members 2.
Are joined together to form a floor member, and side sills 4 are joined and arranged on both side edges of the floor panel 1 in parallel with the outside of the side members 2.

A bottomed battery frame 5 on which a plurality of batteries 8 are mounted is provided with a pair of side frames 6, a front frame 7 and a rear frame (not shown). Each of the frames is formed in a closed cross section and has a rigid structure so as to sufficiently withstand the load of the plurality of batteries 8.

In the battery frame 5 with a plurality of batteries 8 mounted, the upper surface of the side frame 6 abuts against the lower surface of the side member 2 and the upper surfaces of the front frame 7 and the rear frame are connected to the lower surface of the cross member 3. Butts are fastened and fixed with bolts and nuts. This similar structure is disclosed in, for example, Japanese Patent Application Laid-Open No. 52-35.
No. 023.

[0006]

When the battery frame 5 is mounted on the floor panel 1 side, the vehicle body is lifted high with a lifter or the like, and the battery frame 5 is also mounted with a battery 8 using a dedicated bogie type lifter. It is lifted and fastened by bolts and nuts on the lower side of the vehicle body as described above. However, in order to carry out fastening work in an unstable state in which both the heavy vehicle body and the battery frame 5 are lifted, the battery frame 5 is fastened. It is difficult to fasten the floor member while maintaining an appropriate butted state, and the battery frame 5 is displaced in the horizontal direction or the vertical direction, thereby deteriorating the mounting workability.

Therefore, according to the present invention, the battery frame can be temporarily held on the side member of the floor member.
An object of the present invention is to provide a battery frame mounting structure for an electric vehicle, which facilitates a mounting operation of a battery frame to a floor member.

[0008]

According to a first aspect of the present invention, there is provided a structure in which a side frame of a battery frame on which a plurality of batteries are mounted is abutted and fixed to a lower surface of a side member joined to a lower surface of a floor panel. In the upper part of the side frame, a projection protruding toward the side sill side disposed parallel to the outside of the side member of the floor panel is provided, while the projection of the side frame is provided at the lower part of the sill inner of the side sill. A projecting portion projecting toward the side frame side is provided below, and is inserted between a side surface of the side member and the side frame and a side surface of the sill inner when the side member and the side frame abut. A temporary holding spacer that engages with the side sill side projection and the side frame side projection is provided.

According to the present invention, an inclined guide surface is formed on the upper edge of the protrusion on the side frame side, and the lower edge of the protrusion on the side sill side has substantially the same angle as the guide surface on the side frame side. To form an inclined guide surface.

According to the third aspect, the brace is provided inside the portion corresponding to the spacer arrangement of the side member, and inside the portion corresponding to the spacer arrangement of the projection on the side sill side.

[0011]

According to the first aspect, when the upper surface of the side frame of the battery frame abuts against the lower surface of the side member of the floor panel, a spacer is provided between the side surface of the side member and the side frame and the sill inner side surface of the side sill. The battery frame is temporarily held by the side member, that is, the floor member, via the spacer by engaging the spacer with the projection on the side frame side and the projection on the side sill side. Since the mating state can be maintained, the battery frame is not displaced in the horizontal direction or the vertical direction with respect to the floor member and becomes unstable, so that the fastening operation can be easily performed.

According to the second aspect, even when the side frame and the side member are misaligned with each other in the vehicle width direction at the time of abutment, the guide surface on the upper edge of the protrusion on the side frame and the lower portion on the side sill. The edge guide surface is in sliding contact with the side frame, so that the side frame can be easily guided to an appropriate position, so that the side frame and the side member can be easily butted.

According to the third aspect, when the heavy battery frame is temporarily held on the side member via the spacer, a large load is locally applied to the protrusion on the side frame side and the portion corresponding to the spacer arrangement of the side member. However, local deformation can be prevented by the braces provided inside each, and the fastening operation can be easily performed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In FIG. 1, a side member 2 is formed of a panel material having a relatively large thickness and has an inverted hat shape in cross section, and is joined to the lower surface on both sides of the floor panel 1 to form a closed cross section extending in the front-rear direction. I have.

The side sill 4 has a sill inner 4a and a sill outer 4 made of a panel material having a smaller thickness than the side members 2.
b, and is formed in a closed cross section, separated to the outside of the side member 2 and joined to the side edge of the floor panel 1, and extends in the front-rear direction parallel to the side member 2.

The side frame 6 of the battery frame 5 is extruded into a closed cross section using a lightweight metal material such as an aluminum alloy, and a projection 10 protruding toward the side sill 4 is formed above the side frame 6. I have.

The projection 10 is formed integrally with the upper surface of the side frame 6 by extrusion so as to bulge in the above-mentioned direction. In this embodiment, the lower edge of the projection 10 is formed by slanting. Thus, a contact surface 11 of a spacer 14 described later is formed.

On the other hand, a projection 12 projecting toward the side frame 6 below the projection 10 of the side frame 6 is formed below the sill inner 4a of the side sill 4 by bulging.

The protruding portion 12 is formed by bulging into a U-shaped cross section to form a flat support surface 13 on which a spacer 14 is fixed and supported.

When the side frame 6 and the side member 2 abut against each other, the spacers 14 are inserted and arranged at four positions on the front and rear sides of the gap between the side surfaces of the side frame 6 and the side member 2 and the side surface of the sill inner 4a. A protrusion 15 having a wedge-shaped cross section is integrally provided at a lower portion of one side thereof so as to match the shape of the gap. The protrusion 15 is engaged with the inclined contact surface 11 of the lower edge of the protrusion on the side frame 6 side. .

The spacer 14 is formed as a solid block body of an aluminum alloy or the like, or is formed of a resin material having relatively high hardness or a solid block of a resin material reinforced with carbon fiber or glass fiber. Alternatively, it can be formed as a hollow body of these materials or as a hollow body of a steel plate material. In this embodiment, a solid block formed of an aluminum alloy is used.

In this embodiment, the braces 16 and 17 are joined to the inside of the portion of the side member 2 corresponding to the spacer and the inside of the portion of the side sill 4 corresponding to the spacer. .

When the battery frame 5 is mounted on the floor member, as described above, the vehicle body is lifted by the lifter, and the battery frame 5 is lifted by the truck-type dedicated lifter. It is fastened and fixed by external bolts and nuts. When the side frame 6 and the side member 2 abut against each other, a spacer 14 is inserted between the side frame 6 and the side surface of the side member 2 and the sill inner 4a.

By the arrangement of the spacer 14, the spacer 14 is fixedly supported on the support surface 13 of the projection 12 on the side sill 4, and the projection 15 of the spacer 14 is The spacer 14 is interposed and fixed between the protruding portions 10 and the protruding portions 12 even if the battery frame 5 attempts to lower its own weight, because the engaging portion 11 is engaged with the contact surface 11.
Tentatively, the bolts and nuts of the side frame 6 and the side members 2 as well as the bolts and nuts of the front frame 7 and the rear frame and the cross member 3 can be easily fixed.

After the bolts and nuts are fastened between the battery frame 5 and the floor member, the spacer 14 may be removed. In this embodiment, the spacer 14 is fixed to the side sill 4.

In this embodiment, the spacers 14 are fixed on the projections 12 on the side sill 4 side with bolts 18, and therefore, a working hole 19 is provided in the lower wall of the projections 12.

According to the above-described structure of the embodiment, when the upper surface of the side frame 6 abuts against the lower surface of the side member 2 as shown in FIGS. A spacer 14 is inserted between the side surface of the frame 6 and the side member 2 and the side surface of the sill inner 4a, and is engaged with the protrusions 10 and 12.

As a result, the battery frame 5 is temporarily held by the side member 2 and its own weight is prevented from falling, so that the battery frame 5 can be fastened and fixed to the floor member with bolts and nuts (not shown) in a stable state. .

When the battery frame 5 is temporarily held, the load of the battery frame 5 acts locally on the projections 12 of the side members 2 and the side sills 4 where the spacers 14 are provided. Prevents the local deformation of each.

Accordingly, the work of fastening the bolt and nut to the floor member of the battery frame 5 can be easily performed.

After the bolts and nuts are fastened, the spacers 14 are bolted to the protrusions 1 on the side sill 4 side.
2 and fasten it.

As described above, since the spacer 14 is interposed between the side surfaces of the side frame 6 and the side member 2 and the side surface of the sill inner 4a, the side sill 4 is provided on the side surface of the sill outer 4b at the time of a side collision of the vehicle. At the initial stage when the obstacle G collides, the reaction force of the spacer 14, the side member 2 and the side frame 6 causes the obstacle G as shown in FIG.
Sill outer 4b whose thickness is set relatively thin at first
Then, the sill inner 4a is crushed and deformed, and thereafter, the spacer 14, the side member 2 and the side frame 6 are effectively crushed and deformed, so that the collision energy absorption amount can be increased. As a load transmitting member and as a spacer 14
The element itself effectively functions as a collision energy absorbing member.

In the embodiment shown in FIG. 5, an inclined guide surface 20 is formed on the upper edge of the projection 10 on the side frame 6 side, while the guide surface 20 is formed on the lower edge of the projection 12 on the side sill 4 side. The guide surface 21 is inclined at substantially the same angle as that of the guide surface 21.

The spacer 14 is formed in accordance with the formation of the guide surface 20 on the upper edge of the projection 10 on the side frame 6 side.
A wedge-shaped groove 22 having the same sectional shape as that of the projection 10 is formed so as to be able to engage with the projection 10.

In this embodiment, the spacer 14 is fixed to the outer wall of the side member 2 and the sill inner 4a with bolts 23 and nuts 24.

For this reason, a bolt insertion hole 25 is provided in the upper part of the spacer 14, while the nut 24 is fixed by welding to the back side of the outer wall of the side member 2 in advance, and a work hole 26 for inserting the bolt 23 is formed in the sill outer 4 b. The working hole 26 is closed by a grommet 27 after the spacer 14 is fastened and fixed by bolts 23 and nuts 24.

Therefore, according to this embodiment, even when the battery frame 5 is slightly displaced from the floor member in the vehicle width direction when the upper surface of the side frame 6 and the lower surface of the side member 2 are abutted, FIG. As shown by the dashed line, the guide surface 20 at the upper edge of the projection on the side frame 6 side and the guide surface 21 at the lower edge of the projection on the side sill 4 side are in sliding contact with each other.
Since the side frame 6 can be easily guided to an appropriate position on the lower surface of the side member 2 by correcting the displacement of the battery frame 5, the butting operation between the side frame 6 and the side member 2 can be easily performed.

The provisional holding of the spacer 14 after the abutment and the provision of the spacer 14 and the action of absorbing the collision energy at the time of a side collision by fastening and fixing the spacer 14 are substantially the same as those in the above-described embodiment. I do.

[0039]

According to the present invention, the following effects can be obtained. (1) When the upper surface of the side frame of the battery frame abuts against the lower surface of the side member of the floor panel, a spacer is inserted between the side surface of the side member and the side frame and the sill inner side surface of the side sill. By engaging the projections on the frame side and the projections on the side sill side, the battery frame is temporarily held by the side members via the spacers, and the abutting state can be maintained. Without being displaced in the direction and becoming unstable,
Fastening work can be easily performed. (2) An inclined guide surface is provided on the upper edge of the protrusion on the side frame side, and a guide surface inclined at substantially the same angle as the guide surface is provided on the lower edge of the protrusion on the side sill side, so that the side frame and the side member can be separated. Even if there is a mutual displacement in the vehicle width direction at the time of abutment, the displacement can be corrected by the sliding contact guide action of the two guide surfaces, and the side frame can be easily guided to an appropriate position on the lower surface of the side member. Butting between the and the side member can be easily performed. (3) The battery frame is temporarily held on the side member via the spacer by providing the brace inside the portion where the spacer is provided on the side member and inside the portion where the spacer is provided on the side sill side projection. Occasionally, local deformation of the side member and the projection on the side sill side can be prevented, and the fastening operation of the entire battery frame to the floor member including the fastening operation of the side frame and the side member can be easily performed. it can. (4) Since the spacer is interposed between the side surface of the side frame and the side member and the side surface of the sill inner, the spacer functions as a load transmitting member to the side member and the side frame during a side collision of the vehicle, and Since the spacer itself functions as a collision energy absorber, the side member and the side frame can be effectively crushed and deformed, and the collision energy absorption amount can be increased.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a process of mounting the battery frame.

FIG. 3 is a perspective view showing a process of mounting the battery frame.

FIG. 4 is a sectional view showing a main part in a state at the time of a side collision.

FIG. 5 is a sectional view showing a main part of a second embodiment of the present invention.

FIG. 6 is an exploded perspective view showing a relationship between a floor panel and a battery frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor panel 2 Side member 4 Side sill 4a Sill inner 5 Battery frame 6 Side frame 8 Battery 10 Projection on side frame side 12 Projection on side sill side 14 Spacer

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60K 1/04 B62D 25/20

Claims (3)

(57) [Claims] 1. A structure for fastening and fixing a side frame of a battery frame on which a plurality of batteries are mounted to a lower surface of a side member joined to a lower surface of a floor panel. While a projection is provided on the outside of the side member and protrudes toward the side sill which is disposed in parallel with the side member, the projection is provided below the side frame at the lower side of the sill inner of the side sill toward the side frame. When the side member and the side frame abut against each other, the protrusion is inserted between the side member and the side frame and the side of the sill inner, and the side sill side protrusion and the side frame side protrusion are provided. A battery frame for an electric vehicle, characterized in that a temporary holding spacer for engaging with a part is provided. Mounting structure. 2. An inclined guide surface is formed on the upper edge of the projection on the side frame side, and a guide surface inclined at substantially the same angle as the guide surface on the side frame side is formed on the lower edge of the projection on the side sill side. 2. The method according to claim 1, wherein
A battery frame mounting structure for an electric vehicle according to the above. 3. A brace is provided inside a portion corresponding to the spacer arrangement of the side member, and inside a portion corresponding to the spacer arrangement of the projection on the side sill side, respectively. Battery frame mounting structure for electric vehicles.