JP2020125023A - Vehicle frame member - Google Patents

Abstract

To provide a vehicle frame member that can facilitate assembly work at the time of assembling a suspension frame and a battery protection frame to a vehicle body.SOLUTION: A vehicle frame member 3 includes a suspension frame part and a battery protection frame part. The suspension frame part functions as a suspension frame. The battery protection frame part supports a battery case 4 that houses a battery configured to supply power to a motor for allowing a vehicle to travel and protects the battery case. The suspension frame part and the battery protection frame part are integrally formed.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a vehicle frame member.

Patent Document 1 discloses an electric vehicle including a pair of side members, a suspension member, a motor for traveling, a battery, and a holding rack. The pair of side members are skeleton members forming a skeleton on the vehicle body side, and are arranged with their extending directions being the vehicle body front-rear direction. The suspension member is fixed to a side member of the vehicle. The motor is fixed to the suspension member. The battery is a battery for driving the motor. The holding rack holds the battery and includes a protective frame surrounding the outer periphery of the battery. The protective frame protects the fuel cell vehicle from damage such as a collision.

In this electric vehicle, the motor is fixed to the suspension member, and the holding rack is fixed to the motor. In particular, the holding rack is not fixed to the suspension member but fixed to and supported by the motor.

JP, 2016-132326, A

By the way, in a crushing test of a battery case alone containing a battery, which is scheduled to be established by the Chinese standard GB/T-31467, it is conceivable to provide a battery protection frame on the battery case in order to satisfy the evaluation standard. The battery protection frame is a frame for supporting the battery case and protecting the battery case.

On the other hand, a suspension member is provided in the vehicle, and the suspension member includes a suspension frame. Therefore, when the battery protection frame is provided in the vehicle, the vehicle is provided with two frames, the suspension frame and the battery protection frame, which makes the assembly work complicated when the frame is assembled to the vehicle body. Is possible.

An aspect of the present disclosure is to provide a vehicle frame member that can facilitate the assembly work when the suspension frame and the battery protection frame are assembled to the vehicle body.

One aspect of the present disclosure is a vehicle frame member that includes a suspension frame portion and a battery protection frame portion. The suspension frame portion functions as a suspension frame. The battery protection frame portion supports a battery case that houses a battery that supplies electric power to a motor for driving the vehicle, and protects the battery case. The suspension frame part and the battery protection frame part are integrated.

According to such a configuration, when the suspension frame and the battery protection frame are assembled to the vehicle body as compared with the configuration in which the suspension frame and the battery protection frame are not integrated and must be individually assembled to the vehicle body. Assembly work can be facilitated.

In one aspect of the present disclosure, the support surface that supports the battery case in the battery protection frame portion may be a flat surface. The “plane” here is not limited to a plane in a strict sense, and may not be a plane as long as the intended effect is exhibited.

With such a configuration, in the configuration in which the battery case includes the lower cover and the upper cover, and the contact portion of the lower cover with the upper cover is supported by the support surface, the contact portion of the lower cover can be formed in a plate shape. Further, the contact portion of the upper cover with the lower cover can also be formed in a plate shape corresponding to the shape of the contact portion of the lower cover. Therefore, the contact surfaces at the contact portions of the lower cover and the upper cover can be formed to be flat. Therefore, the lower cover and the upper cover can be easily brought into face-to-face contact with each other, and the sealing performance of the battery case can be improved.

In one aspect of the present disclosure, at least a part of the battery protection frame portion and the suspension frame portion may be configured using a frame having a predetermined shape. The frame having a predetermined shape is vertically positioned on one vertical wall portion extending along the extending direction of the frame and one side surface side of the vertical wall portion, and extends along the extending direction 2 And two protrusions.
According to such a configuration, an inexpensive and lightweight vehicle frame member is provided that is superior in strength as compared with the case where both the suspension frame portion and the suspension frame portion are not configured using the frame having the predetermined shape. it can.

1A is a front view of the battery case support structure, FIG. 1B is a plan view of the battery case support structure, FIG. 1C is a rear view of the battery case support structure, and FIG. 1D is a left side view of the battery case support structure. FIG. 2 is a perspective view showing the external appearance of the battery case support structure. FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5 is a sectional view taken along line VV of FIG. 6 is a sectional view taken along line VI-VI of FIG. FIG. 7 is a sectional view taken along line VII-VII of FIG. FIG. 8 is a bottom view of a vehicle body provided with a floor side member and a floor cross member that constitute a vehicle side frame. FIG. 9 is a diagram showing a side frame that is curved in a plan view but linear in a side view. FIG. 10 is a diagram showing a side frame that is curved in a side view but linear in a plan view. 11A is a sectional view of a tubular frame, FIG. 11B is a sectional view of a frame processed by UO bending, and FIG. 11C is a sectional view of a frame processed by extrusion.

Hereinafter, modes for carrying out the present disclosure will be described with reference to the drawings.
[1. Constitution]
The battery case support structure 1 shown in FIGS. 1 to 7 is mounted on the lower portion (under the floor) of the vehicle 2 shown in FIG. 8 and includes a vehicle frame member 3 and a battery case 4. The battery case support structure 1 is a member that supports and protects the battery case 4 by the vehicle frame member 3, and further functions as a suspension frame. The vehicle 2 is not particularly limited as long as it is a vehicle equipped with a battery for supplying electric power to a traveling motor, and examples thereof include EV (electric vehicle), HEV (hybrid vehicle), PHEV (plug-in hybrid vehicle), and the like. Is.
<Vehicle frame member 3>
The vehicle frame member 3 shown in FIGS. 1 to 7 includes a pair of side frames 31, 32, a first cross member 33, a second cross member 34, and a third cross member 35 (see FIGS. 1C and 1D, etc.). ), and. Each of the members 31 to 35 is formed of, for example, a metal material (for example, a steel material), a non-ferrous metal material such as an aluminum alloy, or a reinforced resin material such as carbon fiber reinforced plastic (CFRP) or glass fiber reinforced plastic (GFRP). , Sufficient strength is guaranteed.

The pair of side frames 31, 32 extend along one direction (the left-right direction in FIG. 1B) and are arranged in parallel with each other with a space therebetween. The cross members 33 to 35 connect the pair of side frames 31 and 32 in the direction in which the side frames 31 and 32 are separated from each other (the vertical direction in FIG. 1B). The extending directions of the side frames 31 and 32 coincide with the vehicle front-rear direction when the battery case support structure 1 is mounted on the vehicle 2, and the separating directions of the side frames 31 and 32 coincide with the vehicle width direction. Hereinafter, the extending direction of the side frames 31 and 32 is also referred to as a “vehicle front-rear direction”, and the separating direction is also referred to as a “vehicle width direction”.

The first cross member 33, the second cross member 34, and the third cross member 35 are arranged in this order from the vehicle front side (the left side in FIGS. 1B and 1D) in the vehicle front-rear direction. As shown in FIG. 1B, in a plan view of the vehicle frame member 3, the side frames 31, 32, the first cross member 33, and the second cross member 34 form one frame. Further, as shown in FIGS. 1B to 1D, in a plan view of the vehicle frame member 3, the side frames 31, 32, the second cross member 34, and the third cross member 35 form another frame.

Each of the pair of side frames 31 and 32 extends in a straight line. In particular, the side frames 31 and 32 are linear when viewed from a specific direction (side surface in this embodiment).
The cross-sectional shape of the side frames 31 and 32 orthogonal to the extending direction is substantially B-shaped as shown in FIGS. 2 and 4. Specifically, the side frame 31 is vertically positioned on one vertical wall portion 31a extending along the extending direction of the side frame 31 and one side surface side of the vertical wall portion 31a, and the extension is performed. Two protrusions 31b and 31c extending along the direction are provided. Similarly, the side frame 32 is vertically positioned on one vertical wall portion 32a extending along the extending direction of the side frame 32 and one side surface side of the vertical wall portion 32a, and extends in the extending direction. Two protrusions 32b and 32c extending along the same are provided. The two protrusions 31b and 31c of the side frame 31 may be vertically separated from each other as in the present embodiment, or may be attached to each other. The same applies to the two protrusions 32b and 32c of the side frame 32. The side frame 31 on the left side of the vehicle is arranged so that the two protrusions 31b and 31c face the inside of the vehicle (that is, the right side of the vehicle). The side frame 32 on the right side of the vehicle is arranged such that the two protrusions 32b and 32c face the inside of the vehicle (that is, the left side of the vehicle). The right side of the vehicle and the left side of the vehicle are sides corresponding to the right side and the left side of the vehicle, respectively, when the vehicle frame member 3 is mounted on the vehicle 2. The side frames 31 and 32 are each configured as one component (one frame).

The upper surfaces of the side frames 31 and 32 are flat. As will be described later, the outer peripheral edge portion 41c (see FIG. 4) of the lower cover 41 of the battery case 4 is placed on the upper surfaces of the side frames 31 and 32. In this way, the upper surfaces of the side frames 31 and 32 form part of the support surface that supports the battery case 4.

As shown in FIG. 1B and the like, three fixing members 311 to 313 are provided on the side frame 31 on the left side of the vehicle. The fixture 311 is provided at the vehicle front end of the side frame 31. The fixture 311 is a component for fixing the side frame 31 to the floor side member 202 shown in FIG.

Here, the vehicle 2 is provided with a pair of floor side members 201, 202 and a plurality of floor cross members 203, 203,.... The pair of floor side members 201 and 202 extend in the vehicle front-rear direction. The plurality of floor cross members 203, 203,... Connect the pair of floor side members 201, 202 in the vehicle width direction. The floor side members 201, 202 and the floor cross members 203, 203,... Are skeleton members that constitute the skeleton on the vehicle body side. In addition, in FIG. 8, the assembly position of the battery case support structure 1 is shown by the broken line.

The fixture 312 is provided at a position slightly rearward of the vehicle with respect to the central portion of the side frame 31 in the extending direction. The fixture 312 is a component for fixing the side frame 31 to the floor side member 202. The fixture 313 is provided at the vehicle rear end of the side frame 31. The fixture 313 is a component for fixing the side frame 31 to the floor side member 202.

Similarly, as shown in FIG. 1B and the like, three fixtures 321 to 323 are also provided on the side frame 32 on the right side of the vehicle. In addition, the vehicle frame member 3 including the side frames 31 and 32 is provided from below the floor side members 201, 202 and the plurality of floor cross members 203, 203,..., These members 201, 202, 203, 203,. ..Fixed in the form of being suspended in.

Further, as shown in FIGS. 1B and 2, etc., an arm support portion for supporting an upper arm (not shown) of the suspension at a position slightly rearward of the vehicle with respect to the central portion in the extending direction of the side frames 31 and 32. 314 and 324 are provided, respectively.

Further, as shown in FIG. 1D, FIG. 2, FIG. 5, etc., the side frames 31, 32 are provided with plate-shaped protectors 315, 325 extending in the vehicle front-rear direction. Specifically, protectors 315 and 325 are provided in portions of the side frames 31 and 32 between the first cross member 33 and the second cross member 34. The protectors 315 and 325 are members for protecting the lower portion of the battery case 4 exposed from the lower portions of the side frames 31 and 32.

On the other hand, the first cross member 33 is a linear frame extending in the vehicle width direction. The first cross member 33 connects the side frames 31 and 32 at the vehicle front side end portions of the side frames 31 and 32. Specifically, both end surfaces of the first cross member 33 in the extending direction are in contact with the inner surfaces of the end portions of the pair of side frames 31 and 32 on the vehicle front side.

The cross-sectional shape of the first cross member 33 orthogonal to the extending direction is substantially B-shaped as shown in FIG. Specifically, the first cross member 33 is located above and below one vertical wall portion 33a extending along the extending direction of the first cross member 33 and one side surface side of the vertical wall portion 33a. , Two projecting portions 33b and 33c extending along the extending direction. The two protrusions 33b and 33c may be vertically separated from each other as in the present embodiment, or may be attached to each other. Further, the first cross member 33 is arranged so that the two protrusions 33b and 33c face the inner side (that is, the vehicle rear side).

The upper surface of the first cross member 33 is flat. As described later, the outer peripheral edge portion 41c of the lower cover 41 of the battery case 4 is placed on the upper surface of the first cross member 33. That is, the upper surface of the first cross member 33 constitutes a part of the supporting surface that supports the battery case 4.

Further, as shown in FIG. 1B, a fixture 331 is provided at the center of the first cross member 33 in the extending direction. As shown in FIG. 8, the first cross member 33 is fixed to the floor cross member 203 via the fixture 331.

As shown in FIG. 1A, the first cross member 33 is provided with a plate-shaped protector 332 that extends in the vehicle width direction. Specifically, protectors 315 and 325 are provided in a portion of the third cross member 35 between the pair of side frames 31 and 32. The protector 332 is a member for protecting the lower portion of the battery case 4 exposed from the lower portion of the third cross member 35. The first cross member 33 and the second cross member 34 and the third cross member 35, which will be described later, are each configured as one component (one frame).

The second cross member 34 shown in FIG. 1B, FIG. 1D, FIG. 2 and the like is a linear frame extending in the vehicle width direction. The second cross member 34 connects the side frames 31 and 32 at a position slightly on the vehicle rear side with respect to the central portion in the extending direction of the side frames 31 and 32. As shown in FIG. 1B, the second cross member 34 is slightly longer than the distance between the outer side surfaces of the pair of side frames 31, 32 in the vehicle width direction.

The cross-sectional shape of the second cross member 34 orthogonal to the extending direction is U-shaped as shown in FIG. The second cross member 34 is arranged such that both edge portions of the U-shaped opening come into contact with the lower surfaces of the pair of side frames 31 and 32. A lower arm of a suspension (not shown) is inserted into the opening in the vehicle width direction formed by closing the U-shaped opening of the second cross member 34 with the bottom surfaces of the side frames 31 and 32. Wheels (rear wheels in this embodiment) are provided via suspension arms. The second cross member 34 is welded to the side frames 31 and 32.

The third cross member 35 is a linear frame extending in the vehicle width direction. The third cross member 35 connects the pair of side frames 31, 32 at the rear end portion of the side frames 31, 32 on the vehicle rear side. The third cross member 35 is slightly longer than the distance between the outer surfaces (side surfaces) of the pair of side frames 31, 32 in the vehicle width direction.

The cross-sectional shape of the third cross member 35 orthogonal to the extending direction is U-shaped as shown in FIG. The third cross member 35 is arranged such that the U-shaped opening is in contact with the lower surfaces of the pair of side frames 31 and 32. The third cross member 35 is joined to the side frames 31 and 32 by welding.

Further, a fishing support 351 shown in FIG. 1C, FIG. 1D, etc. is provided at the central portion of the third cross member 35 in the extending direction. The fishing support 351 is a plate-like member that extends in the vehicle width direction and has a U-shaped cross-section orthogonal to the extending direction. The length of the fishing support 351 in the vehicle width direction is shorter than the length of the third cross member 35 in the vehicle width direction. The to-be-fished support 351 is provided so that both edge parts of a U-shaped opening may contact the lower part of the 3rd cross member 35. A lower arm of a suspension (not shown) is inserted into an opening on the vehicle width direction outer side formed by closing the U-shaped opening of the fishing support 351 with the bottom surface of the third cross member 35.

Thus, the pair of side frames 31, 32, the second cross member 34, and the third cross member 35 are suspension frame portions that function as a suspension frame on the vehicle rear side.

As shown in FIGS. 1A to 1D, FIG. 2, etc., the pair of side frames 31, 32 and the first cross member 33 are arranged at substantially the same height in a side view of the vehicle frame member 3. On the other hand, the second cross member 34 and the third cross member 35 are arranged slightly below the pair of side frames 31, 32 and the first cross member 33. As described below, the battery case 4 is supported by the pair of side frames 31, 32 and the upper surfaces of the first, second, and third cross members 33 to 35.
<Battery case 4>
Next, the battery case 4 will be described. As shown in FIG. 1D, FIG. 3, FIG. 4, etc., the battery case 4 includes a lower cover 41 and an upper cover 42.

The lower cover 41 is formed in a box shape with a box-shaped upper portion opened. Specifically, the lower cover 41 includes a bottom surface portion 41a, a side surface portion 41b extending from the outer peripheral edge of the bottom surface portion 41a at an angle with respect to the bottom surface portion 41a, and a flat plate-shaped outer peripheral edge portion 41c connected to the side surface portion 41b. ..

On the other hand, the upper cover 42 is formed in a box shape having a box-shaped lower portion opened. Specifically, the upper cover 42 includes an upper surface portion 42a, a side surface portion 42b extending from the outer peripheral edge of the upper surface portion 42a at an angle to the upper surface portion 42a, and a flat plate-shaped outer peripheral edge portion 42c connected to the side surface portion 42b. Prepare The outer peripheral edge portion 42c of the upper cover 42 is fixed to the outer peripheral edge portion 41c of the lower cover 41 at a plurality of positions using fastening members such as bolts. By fixing the lower cover 41 and the upper cover 42, a sealed space is formed inside the lower cover 41 and the upper cover 42. As shown in FIG. 1B, in a plan view, the upper cover 42 has a shape in which portions near the arm support portions 314 and 324 are recessed inward in the vehicle width direction.

As shown in FIGS. 3 and 5 to 7, the battery module 5 is mounted on the lower cover 41. The battery module 5 has an assembly structure in which a plurality of battery cells 51 made of a secondary battery (lithium ion battery or the like) are arranged. The battery module 5 has a thin rectangular parallelepiped battery cell 51 as a constituent unit. Specifically, the plurality of battery cells 51 are arranged side by side in the thickness direction in an upright state as shown in FIG. As a result, a row of battery cells 51 is formed in the front-rear direction of the vehicle. Then, as shown in FIGS. 5 to 7, by arranging a plurality of rows of the same battery cells 51 in the vehicle width direction (four rows in the present embodiment), the battery module 5 is configured.

The battery module 5 is accommodated in the battery case 4 by fixing the outer peripheral edge portion 41 c of the lower cover 41 and the outer peripheral edge portion 42 c of the upper cover 42 in a state where the battery module 5 is mounted on the lower cover 41. Then, the battery case 4 is supported by placing the lower surface of the outer peripheral edge portion 41c of the lower cover 41 on the upper surfaces of the pair of side frames 31, 32 and the cross members 33 to 35.

When the battery case 4 is supported by the vehicle frame member 3, as shown in FIG. 3, the battery module 5 is located in the range from the first cross member 33 to the second cross member 34 in the vehicle front-rear direction. .. Further, the battery module 5 is surrounded at its outer periphery by the pair of side frames 31, 32 and the first cross member 33. That is, the pair of side frames 31, 32, the first cross member 33, and the second cross member 34 are a battery protection frame portion that supports the battery case 4 and protects the battery case 4.

[2. effect]
According to the embodiment described in detail above, the following effects can be obtained.
(1) In this embodiment, the vehicle frame member 3 includes a pair of side frames 31, 32, a second cross member 34, and a third cross member 35 as a suspension frame portion that functions as a suspension frame. The vehicle frame member 3 also includes a pair of side frames 31, 32, a first cross member 33, and a second cross member 34 as a battery protection frame portion. The suspension frame portion and the battery protection frame portion are integrated.

Therefore, as compared with the configuration in which the suspension frame and the battery protection frame are not integrated and must be separately assembled to the vehicle body, the assembly work is facilitated when the suspension frame and the battery protection frame are assembled to the vehicle body. it can. Furthermore, since the number of constituent members can be reduced and the number of fastening points when assembling the vehicle body can be reduced, the vehicle frame member 3 can be made lighter and the cost can be reduced. Further, the space occupied by the suspension frame and the battery protection frame can be reduced.

(2) In the present embodiment, the upper surfaces of the side frames 31, 32 and the first cross member 33, which are supporting surfaces that support the battery case 4, are flat surfaces.
Therefore, the outer peripheral edge portion 41c of the lower cover 41 supported by the support surface can be formed in a plate shape corresponding to the flat support surface. Further, the outer peripheral edge portion 42c of the upper cover 42 can also be formed in a plate shape corresponding to the shape of the outer peripheral edge portion 41c of the lower cover 41. Therefore, the abutting surfaces of the outer peripheral edge portions 41c, 42c of the lower cover 41 and the upper cover 42 can be formed into a flat surface. Therefore, the lower cover 41 and the upper cover 42 can be easily aligned with each other, and the sealing performance of the battery case 4 can be improved.

(3) In the present embodiment, the side frame 31, which is a part of the suspension frame portion, is configured using a frame including the vertical wall portion 31a and the two protruding portions 31b and 31c. Similarly, the side frame 32 is configured using a frame including a vertical wall portion 32a and two protruding portions 32b and 32c. Similarly, the first cross member 33 is configured using a frame including a vertical wall portion 33a and two protruding portions 33b and 33c.
Therefore, as compared with the case where the side frame and the first cross member are not configured by using the frame having the above-described shape, the vehicle frame member 3 for vehicle which is excellent in strength against the impact from the side, inexpensive and lightweight is provided. Can be provided.

(4) In the present embodiment, the pair of side frames 31, 32 are straight when viewed from a specific direction. Specifically, the side frames 31 and 32 are straight even when the vehicle frame member 3 is viewed from the side. In addition, the side frames 31 and 32 are straight when the vehicle frame member 3 is viewed from above.

Therefore, as compared with the case where the pair of side frames 31 and 32 are not in a straight line when the vehicle frame member 3 is viewed from above or from the side (when it is curved, etc.), the vehicle frame member 3 is molded. It can be done easily.

(5) In the present embodiment, each member of the side frames 31 and 32 and the cross members 33 to 35 is composed of one part. Therefore, it is possible to reduce the weight of the vehicle frame member 3 as compared with the case where at least one of these members 31 to 35 is composed of a plurality of parts. Moreover, since the number of parts can be reduced, the manufacturing cost of the vehicle frame member can be reduced.

In the present embodiment, the side frames 31, 32, the second cross member 34, and the third cross member 35 correspond to the suspension frame portion, and the side frames 31, 32, the first cross member 33, and the second cross member 34 are It corresponds to the battery protection frame portion, and the upper surfaces of the side frames 31 and 32 and the first cross member 33 correspond to the support surfaces that support the battery case in the battery protection frame portion.

[3. Other Embodiments]
Although the embodiments for implementing the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications can be implemented.

(1) In the above-described embodiment, the upper surfaces of the side frames 31, 32 and the first cross member 33, which form the supporting surface for supporting the battery case 4, are flat surfaces, but the shape of the upper surface (and thus the supporting surface) is this. Not limited to For example, the support surface may be a curved surface.

(2) In the above-described embodiment, the side frames 31 and 32 are linear when viewed from above and sideways of the vehicle frame member 3, but the shape of the side frames is not limited to this.
For example, the side frame may have a curved shape when viewed from above as long as it is straight when viewed from the side of the vehicle frame member, as shown by the broken line in FIG. 9. Further, for example, as shown by the broken line in FIG. 10, the side frame may have a curved shape when viewed from the side as long as it is straight when viewed from above the vehicle frame member. Also in these cases, the side frame is straight when viewed from a specific direction (upper or side). The side frame does not have to be a straight line when viewed from any direction.

(3) The configurations of the side frames 31, 32 and the first cross member 33 are not limited to those in the above-described embodiment.
For example, the side frame and the first cross member may have the following configurations as long as they are molded as one part. That is, the side frame and the first cross member may be tubular members (for example, steel pipes) having a circular (elliptical or perfect circular) cross-sectional shape as shown in FIG. 11A. In addition, for example, the side frame and the first cross member may be tubular members that are processed by UO bending and have a substantially O-shaped cross-section with a part missing, as shown in FIG. 11B. Further, for example, the side frame and the first cross member may be tubular members having two parallel partition walls 61 and 62 processed by extrusion molding therein, as shown in FIG. 11C. A plurality of partition walls may be provided. Similarly, the cross-sectional shapes of the second and third cross members are not limited to those in the above embodiment.

(4) In the above embodiment, the side frames 31, 32 and the cross members 33 to 35 are separate members, but the structure of the vehicle frame member is not limited to this. For example, at least two of the pair of side frames and the plurality of cross members may be integrally molded. For example, all of the pair of side frames and the plurality of cross members may be integrally formed, or, for example, the pair of side frames and a part of the plurality of cross members (for example, only the first cross member) may be integrally formed. May be.

(5) In the above embodiment, each member 31 to 35 may be composed of a plurality of parts instead of one part (one frame). In particular, the frame that functions as the suspension frame part and the frame that functions as the battery protection frame part are configured as separate parts, and the suspension frame part and the battery protection frame part are integrated by fixing the separate parts to each other. May be.

(6) In the above-described embodiment, the vehicle frame member 3 in which the battery protection frame and the vehicle rear suspension frame are integrated is illustrated, but the vehicle frame member 3 is not limited to this. For example, the vehicle frame member may be a frame member in which the battery protection frame and the vehicle front suspension frame are integrated.
(7) In the above embodiment, the side frame 31 is fixed to the floor side member 202 via the fixing tools 311 to 313, but the member to which the side frame 31 is fixed is not limited to this. For example, the side frame 31 may be fixed to the floor cross member 203 via the fixing tools 311 to 313. The same applies to the side frame 32 and the fixtures 321 to 323.

(8) A plurality of functions of one constituent element in the above embodiment may be realized by a plurality of constituent elements, or one function of one constituent element may be realized by a plurality of constituent elements. .. Further, a plurality of functions of a plurality of constituent elements may be realized by one constituent element, or one function realized by a plurality of constituent elements may be realized by one constituent element. Moreover, you may omit a part of structure of the said embodiment. Further, at least a part of the configuration of the above-described embodiment may be added or replaced with respect to the configuration of the other above-described embodiment. Note that all aspects included in the technical idea specified by the wording recited in the claims are embodiments of the present disclosure.

1... Battery case support structure, 2... Vehicle, 3... Vehicle frame member, 4... Battery case,
5... Battery module, 31, 32... Side frame, 33-35... Cross member,
41... Lower cover, 42... Upper cover, 51... Battery cell.

Claims (3)

A frame member for a vehicle,
A suspension frame part that functions as a suspension frame,
A battery protection frame portion that supports a battery case that houses a battery that supplies electric power to a motor for traveling of the vehicle and that protects the battery case;
Equipped with
A vehicle frame member in which the suspension frame portion and the battery protection frame portion are integrated. The vehicle frame member according to claim 1,
A vehicle frame member, wherein a support surface for supporting the battery case in the battery protection frame portion is a flat surface. The vehicle frame member according to claim 1 or 2,
At least a part of the battery protection frame portion and the suspension frame portion is configured by using a frame having a predetermined shape,
The frame having the predetermined shape is vertically positioned on one vertical wall portion extending along the extending direction of the frame and one side surface side of the vertical wall portion, and extends along the extending direction. A frame member for a vehicle, comprising:

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