JP3406074B2 - Chassis frame 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 chassis frame of an electric vehicle using a storage battery as a drive source.

[0002]

2. Description of the Related Art In an electric vehicle of this type driven by a storage battery, the ratio of the storage battery to the vehicle body weight is larger than that of a general vehicle driven by an engine (about 30% of an electric vehicle), and a large storage space is required. Need. Therefore, as a storage system for storage batteries, an independent storage space is provided under the hood, trunk, or luggage compartment, and a storage battery container is attached to store the storage battery therein. There is known a backbone system in which a battery is provided and a storage battery is housed therein.

However, in such a storage system, since an independent storage space has to be provided under the hood, trunk, or cargo bed, a considerable space inside the vehicle body is wasted, and a separate storage battery container is used. Since it has to be installed, there is a disadvantage that the weight of the vehicle body increases.

Then, recently, as shown in FIGS. 19 and 20, there has been proposed a structure in which a hollow closed cross-section structure 1 constitutes a chassis frame, and a storage battery is housed and arranged in the closed space S thereof. (Japanese Patent Application No. 5-56384
issue). The closed cross-section structure 1 includes side frames 2, 2 ',
The center frame 3 and the storage frames 5 and 6 are provided, and the wheels W are arranged in the spaces 7 provided on the sides of the storage frame 6, respectively. When manufacturing such a closed cross-section structure 1, two bent plate members 10 and 11 are joined by spot welding 8 or the like to be formed into a substantially flat surface.

In the chassis frame composed of the closed cross-section structure 1 as described above, the closed space S itself constitutes a storage space for the storage battery, so that an independent storage space is secured under the hood, trunk or cargo bed for exclusive use. It is not necessary to mount the container of the above, the structure is simple, the inside of the car body does not become narrow, and since the chassis itself is a strength member of the car body, it is possible to mount a heavy storage battery without special reinforcement members. Therefore, a lightweight vehicle body can be obtained, and moreover, there are many advantages such as the fact that a fluid for cooling the storage battery can be made to flow in the closed space of the closed cross-section structure 1, so that it will become the mainstream of future chassis frames. Is expected.

[0006]

However, in the conventional chassis frame having the closed cross-section structure 1, since the two plate members 10 and 11 are joined by spot welding 8 or the like, the chassis frame Production time,
There is a problem that the time and the like increases and the cost becomes high. In addition, side sills, pillars, etc. must be connected to the chassis frame by welding, and moreover, there are many welding points, and the work is troublesome, which causes a cost increase.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to facilitate the manufacturing and assembling work without sacrificing the space inside the vehicle body. Another object of the present invention is to provide a chassis frame for an electric vehicle that enables storage of a storage battery without using a special container. Another object of the present invention is to provide a chassis frame for an electric vehicle in which the storage battery can be easily taken in and out and the storage battery can be effectively cooled. Still another object of the present invention is to provide a chassis frame for an electric vehicle, which is capable of mitigating a side collision, protecting a storage battery, and easily and easily mounting a pillar.

[0008]

In order to achieve the above object, the invention according to claim 1 is such that a plurality of frame constituent members made of a hollow extruded mold member are formed so that their longitudinal directions coincide with the longitudinal direction of the vehicle body. In the same direction or by jointly using mechanical means and other joining means to make the hollow part of each frame component a storage space for the storage battery, and
A support member for supporting the storage battery in the battery storage space
This support member is the space for accommodating the storage battery.
Inside the frame with an appropriate space between it and the bottom surface
It is characterized in that it is arranged so that it can be pulled out in the longitudinal direction of the constituent members . The invention described in claim 2 is claim 1
In the invention described in (1), mechanical joining of frame constituent members
Means are provided on the frame components for engaging each other.
It is a joint part . The invention of claim 3 is the invention according to claim 1 or 2, the frame
The mechanical joining means of the components is the fitting groove and the fitting groove.
Assembling the fitting pieces that fit together and the engaging parts that engage with each other
It is characterized by being a combination . According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, electricity is stored in the storage space of each frame constituent member.
A pipe for flowing a fluid for cooling the pond is arranged . Invention according to claim 5, in the invention according to any one of claims 1-4, adjacent frame
The space between the components makes it possible to store wiring, piping, etc.
The mechanical joining means of the frame component, characterized in that over the scan are provided, the fitting groove and the fitting piece to be fitted to the fitting groove, the combination of the engaging portions to be engaged with each other Is characterized in that.

[0009]

The plurality of frame constituent members made of the hollow extruded material are connected in the width direction with their longitudinal directions aligned with the longitudinal direction of the vehicle body, and the hollow portions form the storage battery storage space.
The mechanical joining means of the frame constituent members is composed of the engaging portion or the fitting groove and the fitting piece, and facilitates the joining work of the frame constituent members. The support member is inserted in the frame component so as to be freely drawn out, and facilitates replacement of the storage battery. Further, the space is provided to facilitate the exhaust heat and prevent the storage battery from being damaged by the impact on the lower surface of the chassis. A storage battery is cooled by flowing a storage battery cooling fluid through a pipe arranged in a storage space of a frame component.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a plan view showing a first embodiment of a chassis frame for an electric vehicle according to the present invention, FIG. 2 is a perspective view of an essential part showing the frame and mechanical joining means thereof, and FIG. 3 shows a part of a vehicle body structure. FIG. In these figures, a vehicle body 40 of an electric vehicle is a strength member including a chassis frame 41 forming a floor, side sills 42 mounted on the chassis frame 41, A pillars 43, B pillars 44, rear pillars 45, a roof rail 46, and the like. It is configured.

The chassis frame 41 is provided with a plurality of frame constituent members 50, for example, eleven, which are hollow extrusion-shaped members having a square-shaped cross section, and whose longitudinal direction is aligned with the front-rear direction of the vehicle body in the vehicle width direction. It is manufactured by joining to.
Eleven frame components 50 (50a-1 to 50a-8)
, 50a-S, 50a-S, 50a-C), the frame constituent members 50a-S, 50a-S form side frames, and the frame constituent members 50a-1 located inside these side frames.
.About.50a-8 form a normal frame. The frame constituent members 50a-1, 50a-2, 50a-7, 50a-8 and 50a-S, 50a-S are made short by cutting off both ends, whereby the normal frame 5
Spaces 51 for arranging the wheels W are secured at the sides of both ends of 0a-3 and 50a-6. The hollow portion of the frame component member 50 forms a storage space 52 for the storage battery 60 and an air flow passage. Storage battery 6
0 is placed on the support member 61 and stored in the storage space 52. 50a-C is a center frame, and the inside of the hollow can be used as a space for wiring and piping.

As the chassis frame 41, for example, total length: 3348 mm, width: 1540 mm, wheel base: 2604 mm, chassis weight: 89 kg, chassis bending rigidity: 5.7 × 10 ¹¹ N · mm ² , maximum chassis bending strength ( When a concentrated load is applied to the center of the chassis): 6
4.7KN, torsional rigidity of chassis: 1.2 × 10 ¹¹ N ・
It is about mm ² . As the frame component 50,
It is made of aluminum alloy, for example, JIS A6N01-T6 material.

In FIG. 2, the frame constituent member 50 is
An upper plate 50A and a lower plate 50B that are vertically opposed to each other,
It is composed of a pair of side plates 50C and 50D that face each other in parallel to the left and right and connect both ends of the upper plate 50A and the lower plate 50B. At both ends of the upper plate 50A, elastically deformable engaging portions 62A, 62B extending outward from the side plates 50C, 50D are integrally provided over the entire length. On the upper surface of the tip of the engaging portion 62A, a claw portion 63 having a triangular cross section is integrally provided over the entire length. The engaging portion 62B is provided with a locking step portion 64 on the lower surface side because the engaging portion 62B is higher than the engaging portion 62A by the thickness of the plate and the tip portion is formed thicker. The claw portion 63 of the engaging portion 62A of the adjacent frame member 50 is engaged with the locking step portion 64, and the joining means 47 for mechanically joining the upper surface side of the frame constituent member 50 by these.
Are configured.

At both ends of the lower plate 50B, engaging portions 65A and 65B as joining means 48 for mechanically joining the lower surface side of the frame constituent member 50 are integrally projected over the entire length. The tip portion of the engagement portion 65A forms a fitting piece 66 over the entire length. The fitting piece 66 is formed in an inverted "L" shape so that the vertical piece portion 66a and the vertical piece portion 6 are formed.
Curved piece portion 6 curved obliquely downward from the upper end of 6a
6b and. The engaging portion 65B has a reverse "No" -shaped fitting groove 6 which opens to the side of the frame component 50.
7 is formed over the entire length. In the fitting groove 67, the fitting piece 6 of the engaging portion 65A of the adjacent frame member 50 is inserted.
6 (curved piece portion 66b) are fitted, and the lower surface side of the frame constituent member 50 is mechanically joined by these.

When the frame component 50 is joined,
Two adjacent frame components 50 as shown in FIG.
The curved piece portion 66 of the fitting piece 66 is tilted in advance by a required angle.
b into the fitting groove 67, and one frame component member 5
When 0 is rotated in the direction of arrow 68, the curved piece portion 66b is gradually inserted into the fitting groove 67, and when the two frame component members 50 become parallel to each other, the vertical piece portion 66a comes into contact with the side surface of the engaging portion 65B. . At this time, the engaging portion 62A elastically deforms downward and enters the lower side of the engaging portion 62B, and the claw portion 63 engages with the locking step portion 64 due to the elastic return of the engaging portion 62A.
Therefore, the frame component 50 can be joined in the side direction. Incidentally, such a mechanical joining means 47,
If the strength obtained by joining with 48 is insufficient, the joining strength may be increased by jointly using fastening means such as bolting, welding, and an adhesive.

A hook-shaped guide 70 for supporting the lower surface of the widthwise end portion of the support member 61 at the middle portion in the height direction of the inner side surfaces of the left and right side plates 50C, 50D constituting the frame component member 50.
Are integrally provided so as to project over the entire length in the longitudinal direction. When accommodating the storage battery 60, the support member 61 on which the storage battery 60 is placed is placed on the belt conveyor, and is accommodated along the guide 70 from the front or rear side opening of the frame component member 50, and then the opening of the frame component member 50. The part may be covered with an appropriate cover. In addition, a cooling pipe 72 for flowing a fluid for cooling the storage battery is provided in the groove formed on the upper surface of each guide 70. As the cooling fluid,
Air, water, etc. are used. When using air, for example, an air intake port may be provided in a cover that covers the front opening of the frame component member 50, and the internal space of the frame component member 50 may be used as an air passage. When water is used, it is desirable that the water is circulated through the pipe 72 and that a radiator or the like for cooling the circulating water is provided. When the pipe 72 is composed of a heat pipe, the evaporation portion is connected to the storage battery 6
0 may be arranged in the upper space portion of the frame component member 50, that is, in the storage battery storage space 52, and the condensing portion may be arranged in the lower space portion 73 forming the air passage. Then, the heat generated in the storage battery 60 is used to evaporate the working liquid to lower the heat of the storage battery 60, and the evaporated working liquid is condensed into a liquid by the air flowing in the lower space 73 in the condensing section. The working fluid circulates through the heat pipe while repeating such evaporation and condensation, whereby the storage battery 6
0 is cooled. The number of the cooling pipe 72 is not limited to one, and as shown in the chain double-dashed line in FIG. 2, a gap between the frame component 50 and the storage battery 60 or a space 73 below the support member 61 may be provided as necessary. Of course, a plurality of lines may be arranged. Further, the condenser may be arranged outside the frame to radiate heat.

Thus, in the chassis frame 41 having such a structure, the adjacent frame constituent members 50
Since they are configured to be joined by the mechanical joining means 47, 48 including the engaging portions 62A and 62B and the fitting piece 66 and the fitting groove 67, the joining work is easier than the joining by welding or the like. And it is easy and can be assembled in a short time. Further, when sufficient strength and rigidity cannot be obtained only by the mechanical joining means 47, 48, an adhesive is previously applied to the engaging portions 62A, 62B, the fitting pieces 66, and the fitting groove 67 as another joining means. Alternatively, bolts or welding (TIG, MIG, laser welding, etc.) may be used together to increase the bonding strength.

Further, in the present invention, an appropriate space 73 is formed between the support member 61 of the storage battery 60 and the inner bottom surface of the frame component member 50, so that the storage battery 60 and the support member 61 are mounted and replaced. Is simple and easy, and since the space 73 forms a passage for air, the cooling effect of the storage battery 60 can be improved.

Further, according to the present invention, the frame constituent member 50 constituting the chassis frame 41 is made of a hollow extruded material such as an aluminum alloy, and the internal space thereof is used as the storage space 52 for the storage battery 60. Therefore, the trunk, the bonnet, or the It is not necessary to provide an accommodating space under the luggage carrier to provide a storage battery accommodating container and further a reinforcing member, so that the space in the vehicle body can be widely used. Also,
If it is not necessary to provide a dedicated container, the weight of the vehicle body does not increase and the weight can be reduced. Furthermore, the frame component 5
Since 0 itself is a member having a hollow cross section and high rigidity, the heavy storage battery 60 can be mounted and the storage battery 60 can be protected from a car accident or the like.

FIG. 5 is a perspective view showing a second embodiment of the present invention. In this embodiment, the left and right ends of the frame constituent member 50 are formed in a vertically symmetrical shape, and the upper plate 50 is provided at both ends of the lower plate 50B.
Engaging portions 75A and 75 similar to the engaging portions 62A and 62B of A
B is integrally extended. In this embodiment, when the frame constituent members 50 are joined to each other, the engaging portions 62A and 75A of one frame constituent member 50 are connected to each other on the same plane and the other engaging portions 62B and
It has the advantage that it can be plugged in and joined to 75B. In the figure, a guide for supporting the storage battery support member is omitted.

FIG. 6 is a front view of the essential portions of the third embodiment of the present invention. In this embodiment, the space formed between the adjacent frame components 50, that is, the space 8 surrounded by the side plates 50C and 50D and the engaging portions 62A, 62B, 75A and 75B.
0 is used as a storage space for wiring, piping, etc., and is also used as a bolt mounting portion for fixing the cross member and various members arranged on the upper and lower surfaces of the chassis frame 50 and the component 81. is there.

In such a structure, the space 80 formed between the frame constituent members 50 can be used as a storage space for wiring, piping, etc., and therefore, when these are arranged on the upper surface or the back surface of the frame. By comparison, accidents such as breakage and disconnection can be significantly reduced.

FIG. 7 is a perspective view showing a fourth embodiment of the present invention. This embodiment is a modification of the embodiment shown in FIG.
Engaging portions 62A and 62B are integrally provided at the middle portions in the height direction of the outer side surfaces of the left and right side plates 50C and 50D that face each other. Even in such a configuration, the closed space 87a and the open space 87b formed between the frame constituent members 50 can be used as a storage space for wiring, piping and the like.

8 (a) and 8 (b) are perspective views of the essential portions of the fifth embodiment of the present invention. (A) shows the pipe support 9 at the center of the inner bottom surface of the frame component 50 in the width direction.
1 is integrally projected over the entire length in the longitudinal direction, and a cooling pipe 7 is provided in a semicircular pipe groove 92 formed on the upper surface thereof.
2 is inserted and arranged, and the upper peripheral surface of the pipe 72 is covered by a semicircular cover portion 93 provided at the center of the lower surface of the support member 61. (B) is a frame component 50
One side plate, for example, the side plate 50D is provided with a cylindrical portion 94 integrally near the lower portion of the inner side surface thereof, and the cooling pipe 72 is inserted and arranged in the cylindrical portion 94.

In such a structure, it is not necessary to fix the pipe 72 by using a dedicated fixing member, and the positional deviation of the cooling pipe 72 due to vibration or the like can be reliably prevented. The pipe supporting portion 91, the cover 93, and the cylindrical portion 94 can be molded at the same time when the frame constituent member 50 and the supporting member 61 are extruded.

FIG. 9 is a perspective view of an essential part showing a sixth embodiment of the present invention, and FIG. 10 is a sectional view. In this embodiment, a side sill 100 is joined to a frame constituent member 50 'which is located on the outermost side of the chassis frame and constitutes a side frame by a joining means similar to the joining means of the frame constituent member 50 described above. Similar to the embodiment shown in FIG. 2, an engaging portion 62B and a fitting groove 67 are provided above and below the outer end of the frame component 50 'to enable joining with the side sill 100. Further, the internal space of the frame constituent member 50 ′ forms a storage space 101 for the storage battery, and the space formed with the side sill 100 includes piping, wiring,
A storage space 102 such as a bolt is formed.

The side sill 100 is composed of the frame constituent member 5
As with No. 0, it is made of a hollow extruded material such as an aluminum alloy and is formed in an L-shaped cross section so that the substantially rectangular base 100A that is long in the vehicle width direction and the frame constituent member 50 'on the upper surface of the base 100A are opposite to each other. The pillar mounting portion 100B has a rectangular cross section or a trapezoidal cross section that is provided on the side. The base portion 100A has the same height as the frame constituting member 50 ', and a pair of vertically-opposing pillar support fins 103 are projectingly provided inside thereof, and the inside of this fin 103 in the internal space, that is, the frame constituting member. 5
The space on the 0 ′ side forms a storage battery storage space 104. The inside of the pillar attachment portion 100B forms an end insertion space 106 of the cross member 105, and is separated from the inside of the base portion 100A by a partition wall 107. Further, a pair of cross member support fins 108 are provided opposite to the inner wall of the pillar mounting portion 100B.
The cross member 105 is disposed on the upper surfaces of the frame components 50 and 50 'and the side sill 100 so as to be orthogonal to them, and one end portion of the cross member 105 is provided through an opening 109 provided on the inner side surface of the pillar mounting portion 100B. It is inserted into the insertion space 106 and is located between the partition wall 107 and the cross member support fin 108. Also,
The cross member 105 is fixed to the upper surfaces of the frame members 50 and 50 ′ and the side sill 100 by a plurality of bolts (or rivets) 110 or welding, and further fixed to the opening 109 by welding.

A pillar (not shown) is attached to the upper surface of the side sill 100 at a position offset from the cross member 105, and the lower end of the pillar penetrates the partition wall 107 to form a base portion 100A.
It is inserted inside and the movement in the left-right direction is restrained by the pillar support fins 103. A space inside the base 100A outside the pillar support fins 103 forms a pillar storage space 112.

In the chassis frame having such a structure, the side sill 100 and the cross member 105 are provided.
Mechanical joining means to the frame members 50, 50 ',
Since the frame is joined and fixed by welding, bolts or the like, the strength and rigidity of the frame itself can be further increased. Furthermore, since the cross member 105 is restrained from moving in the vertical direction by the partition wall 107 and the cross member support fins 108, the strength and rigidity can be further enhanced. Further, the cross member end insertion space 106 and the pillar storage space 112 of the side sill 100 absorb the impact when a side collision occurs, so that the storage battery can be prevented from being damaged or popping out. In this case, urethane foam and PP are placed in these spaces.
If a cushioning material such as foam beads is filled, the shock absorbing effect can be further enhanced.

FIG. 11 is a perspective view of a main portion showing a seventh embodiment of the present invention, and FIG. 12 is a sectional perspective view of a main portion of a pillar mounting portion.
This embodiment shows a modification of the sixth embodiment. The inside of the base 100A of the side sill 100 is partitioned into two left and right spaces by pillar support ribs 113, the inner space is the storage battery storage space 104, and the outer space is the pillar storage. A space 112 is formed, and the inside of the pillar mounting portion 100B is partitioned into two upper and lower spaces by a horizontal cross member support rib 114, and the lower space is made a cross member storage space 106, and a cross is formed on the upper surface of each frame component member 50 and the side sill 100. The member 105 is joined and fixed, one end thereof is inserted into the cross member storage space 106, and joined and fixed to the opening of the pillar attachment portion 100B by welding 115, and the A pillar is formed in the opening formed in the upper surface and the partition wall 107 at a predetermined position. 43 (or B pillar 44) is fitted and inserted, It is obtained by bonding fixed by contact 115.

In such a structure, since the pillar support ribs 113 and the cross member support ribs 114 are each made of one plate, the side sill 100,
The strength and rigidity of the A pillar 43 and the chassis frame can be further increased, and the storage battery can be protected from accidents and the like.

FIG. 13 is a perspective view of an essential portion showing an eighth embodiment of the present invention, and FIG. 14 is a sectional perspective view of an essential portion of the A-pillar mounting portion. In this embodiment, the side sill 130 is manufactured separately from the frame constituent member 50 'by extrusion molding, and is joined and fixed to the frame constituent member 50' by a mechanical joining means 131 and a plurality of bolts 132. . The side sill 130 is formed in a hollow shape by a top plate 130A, a pair of left and right side plates 130B and 130C, and a bottom plate 130D, the lower end of the inner side plate 130B is horizontally bent, and the side sill 130 is formed on the top surface of the frame component member 50 '. Bolt 132
Is fixed by. The lower end of the outer side plate 130C is bent substantially horizontally in the frame component 50 'direction,
The tip portion forms an inverted "re" -shaped fitting piece 133,
It is adapted to be fitted and connected to the fitting groove 67 of the frame constituent member 50 '. The bottom plate 130D is bent in an inverted L shape so that the horizontal plate portion 130a and the vertical plate portion 13 are formed.
0b, and an engaging portion 135 integrally extends toward the frame component 50 ′ side near the upper end of the outer surface of the vertical portion 130b. The engaging portion 135 is provided on the side sill 13
When 0 is attached, the engaging portion 62B of the frame component 50 'is engaged from below. The upper end of the vertical plate 130b and the side plate 130C are connected to each other by a partition plate 136. A pair of left and right cross member support ribs 137 are integrally projectingly provided above the inside of the side sill 130. The A pillar 43 is the top plate 13 of the side sill 130.
0A and the openings formed in the partition plate 136 are fitted and inserted from above, and are joined and fixed by welding 115.
Then, the frame component 50 ′ and the side sill 13
No. 0 front side opening (also the rear side opening) is the cover 1
It is closed by 38. The cover 138 may be attached by any structure such as screws and welding.

Even in such a structure, the side sill 1
Since the strength and rigidity of the frame constituent member 50 'can be increased by 30, the storage battery can be well protected from a collision from the side direction, and the storage battery can be prevented from being damaged or popping out.

FIG. 15 is a perspective view of the essential portions of the ninth embodiment of the present invention. In this embodiment, the side sill 140 having the same height as the frame constituent member 50 'is attached to the frame constituent member 5.
The outer surface of 0'is joined by a mechanical joining means 131 including an engaging portion and a fitting piece similar to those in the eighth embodiment,
The lower end of the A pillar 43 (or the B pillar 44) is inserted into the side sill 140 from above and is welded and fixed. The side sill 140 has a groove 141 whose upper surface is open, and the portion other than the insertion position of the A pillar 43 is covered by the cover 14.
Closed by 2. The cover 142 is detachably fitted and fixed to the upper opening of the side sill 140 by an appropriate locking means such as an elastic engaging piece. In the case of this embodiment, the upper end of the side sill 140 is formed on each frame component member 5.
The height is the same as that of the upper surface of 0 ', which makes it easy for people to get in and out of the vehicle and to clean the inside of the vehicle. In this case, without using the cover 142, an opening may be formed by post-processing only on the pillar attachment portion on the upper surface of the side sill 140 as in the above embodiment, and the lower end portion of the A pillar 43 may be inserted and fixed in this opening. Good.

FIG. 16 is a perspective view of essential parts showing a tenth embodiment of the present invention. In this embodiment, a bracket 150 as a pillar mounting portion is attached to the frame constituent member 50 ', and the A pillar 43 (or the B pillar 44) is erected and fixed on the bracket 150. The bracket 150 includes the engaging portion 62B of the frame component 50 '.
Is joined to the frame component member 50 ′ by an engaging portion 151 that engages with the fitting groove 152 and a fitting piece 152 that fits into the fitting groove 67, and is fixed by a plurality of bolts 153. The lower surface of the A pillar 43 is formed in a shape that can be fitted to the upper end of the bracket 150, and is joined and fixed by welding, bolts, or the like. The side sill 155 is attached to a portion where the bracket 150 is not attached. The height of the upper end of the side sill 155 is the same as that of the upper surface of each frame constituent member as in the ninth embodiment.

Even in such a structure, the mounting work of the bracket mounting bracket 150 and the A pillar 43 is simple and easy.

FIG. 17 is a perspective view showing an eleventh embodiment of the present invention. In this embodiment, the pillar 160 is integrally formed by extrusion molding, an engaging portion 161 as a mechanical joining means and a fitting piece 162 are integrally projected on the upper surface, and a side sill (or frame constituent member) at the lower end is formed. Opposing surface 163
Similarly, an engaging portion 164 as a mechanical joining means and a fitting piece 165 are integrally provided so as to project. The engaging portion 164 and the fitting piece 165 join the side sill (or the frame constituent member) and fix them with bolts. It is something that is done. 166 is a bolt mounting hole.

Even in such a configuration, the A pillar 16
Installation work of 0 is easy and easy.

FIG. 18 is a perspective view of a center frame showing a twelfth embodiment of the present invention. In this embodiment, a center frame 50a-is arranged in the center of a chassis frame (see FIG. 1) using the frame component 50 shown in FIG.
FIG. 6C shows an engaging portion 62 having the same shape as the engaging portions 62B and 65B formed on the right side of FIG.
B'and 65B 'are formed on both sides thereof. As a result, the frame constituent members 50 disposed on the left and right of the center frame having the same cross-sectional shape can be used as the front and rear, so that a symmetrical chassis frame can be formed.

The center frame 50a-C forms a necessary engaging portion according to the shape of the engaging portion of the frame component 50. Further, the shape of the hollow portion may be used as a storage battery accommodating space like other frame constituent members, or the hollow portion may be used as a wiring or piping space. It can also be used to adjust the vehicle width design dimensions.

The present invention is not limited to the above-mentioned embodiment, and various modifications and changes can be made without departing from the gist of the present invention, such as the shape of the mechanical joining means of the frame component 50, the side sills, and the pillars. It goes without saying that the above can be variously changed.

[0042]

As described above, according to the chassis frame for an electric vehicle of the present invention, the internal space of the frame constituent member is used as the storage space for the storage battery. Therefore, a dedicated container is used as a trunk, a hood, or a luggage carrier. It is not necessary to provide a storage space below, and the space inside the vehicle body can be widely used. Further, if it is not necessary to provide a dedicated container, the weight of the vehicle body does not increase, and the weight can be reduced.
Furthermore, since the frame component itself is a hollow extruded material,
It has a large strength and rigidity, enables the mounting of a heavy storage battery, and protects the storage battery from a car accident or the like.

Further, according to the present invention, the plurality of frame constituent members made of the hollow extruded mold material are combined by the mechanical joining means composed of the engaging portion or the fitting groove and the fitting portion. Is easy to assemble and can be assembled in a short time. Further, by using welding, bolts, rivets, adhesives, or other joining means in addition to such mechanical joining means, the strength and rigidity of the chassis frame can be further increased.

Further, according to the present invention, since the supporting member on which the storage battery is installed is arranged so as to be drawn out, the mounting and replacement work of the storage battery is simple and easy, and a space is provided between the storage member and the frame constituent member. As a result, this space forms a passage portion for air, so that the cooling effect of the storage battery can be improved. It also protects the storage battery against impacts on the bottom surface of the chassis.

Further, according to the present invention, since the cooling pipe is arranged in the storage battery accommodating space of the frame constituent member to cool the storage battery, the storage battery can be effectively cooled.

Further, in the present invention, since the space for accommodating the wiring, the piping and the like is formed between the adjacent frame constituent members, it is possible to favorably protect the wiring and the piping from damage, cutting and the like. .

[0047]

[0048]

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a chassis frame for an electric vehicle according to the present invention.

FIG. 2 is a perspective view of an essential part showing the frame and a mechanical joining means thereof.

FIG. 3 is a perspective view showing a part of a vehicle body structure.

FIG. 4 is a diagram for explaining a method of joining frame constituent members.

FIG. 5 is a perspective view showing a second embodiment of the present invention.

FIG. 6 is a front view showing a third embodiment of the present invention.

FIG. 7 is a perspective view showing a fourth embodiment of the present invention.

8 (a) and 8 (b) are perspective views of essential parts showing a fifth embodiment of the present invention.

FIG. 9 is a perspective view showing a sixth embodiment of the present invention.

FIG. 10 is a sectional view.

FIG. 11 is a perspective view showing a cross section of a main part of a seventh embodiment of the present invention.

FIG. 12 is a perspective view of a pillar mounting portion.

FIG. 13 is a perspective view showing an eighth embodiment of the present invention.

FIG. 14 is a cross-sectional perspective view of a main part of a pillar mounting portion.

FIG. 15 is a perspective view showing a ninth embodiment of the present invention.

FIG. 16 is a perspective view showing a tenth embodiment of the present invention.

FIG. 17 is a perspective view of a pillar showing an eleventh embodiment of the present invention.

FIG. 18 is a sectional view of a center frame showing a twelfth embodiment of the present invention.

FIG. 19 is a perspective view showing a conventional example of a chassis frame.

FIG. 20 is a sectional view of the frame.

[Explanation of symbols]

41 ... Chassis frame, 43 ... A pillar, 44 ... B pillar, 45 ... Rear pillar, 50 ... Frame constituent member, 5
2 ... Storage battery storage space, 60 ... Storage battery, 61 ... Support member, 62A ... Engaging portion, 62B ... Engaging portion, 65A, 65B
... Engaging portion, 66 ... Fitting piece, 67 ... Fitting groove, 72 ... Cooling pipe, 80 ... Wiring, piping space, 100 ... Side sill, 105 ... Cross member, 130 ... Side sill.

Front page continuation (72) Inventor Mitsuo Tsuge 1-34-1 Kambara, Kambara-cho, Awara-gun, Shizuoka Nipparu Giken Co., Ltd. Nikkei Giken Co., Ltd. (72) Inventor Takashi Sasamoto 1-34-1 Kambara, Kambara-cho, Anbara-gun, Shizuoka Prefecture Nikkei Giken Co., Ltd. (56) Reference JP-A-6-219336 (JP, A) Special Kaihei 3-129111 (JP, A) JP-A-4-193689 (JP, A) JP-A-4-334670 (JP, A) Actual exploitation Sho 57-147113 (JP, U) (58) Fields investigated ( Int.Cl. ⁷ , DB name) B62D 21/18 B60K 1/04 B62D 25/00

Claims (5)

(57) [Claims] 1. A plurality of frame constituent members made of a hollow extruded member are joined in the width direction with their longitudinal directions aligned with the longitudinal direction of the vehicle body by using mechanical means or mechanical means and other joining means. , The hollow part of each frame component is a storage battery
The storage space for
A support member for supporting the storage battery is provided in the battery,
This support member has an inner bottom surface in the storage battery storage space.
And the length of the frame component with an appropriate space between
A chassis frame for an electric vehicle, which is inserted and arranged so as to be pulled out in any direction . 2. The chassis frame for an electric vehicle according to claim 1 , wherein the mechanical joining means of the frame constituent members is a frame constituent part.
A chassis frame for an electric vehicle, which is an engaging portion provided on a member and engaging with each other . 3. The chassis frame for an electric vehicle according to claim 1 or 2 , wherein the mechanical joining means of the frame constituent members is a fitting groove, and
Fitting pieces that fit in the fitting groove, and engaging parts that engage with each other
A chassis frame for an electric vehicle, which is a combination of 4. The chassis frame for an electric vehicle according to any one of claims 1 to 3, wherein a storage battery is cooled in a storage space of each frame constituent member.
A chassis frame for an electric vehicle, characterized in that a pipe for flowing the fluid is disposed . 5. The chassis frame for an electric vehicle according to any one of claims 1 to 4 , wherein wiring, piping and the like can be housed between adjacent frame constituent members.
A chassis frame for electric vehicles, which is characterized by the provision of a space that enables it.