JP2001048057A - Car body rear structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rigidity around a rear floor forming an inspection hole. SOLUTION: Because a flange 8 is bent and molded in the direction opposite to a flange 5 bent and molded at a peripheral edge of a cut-out part 4 for fitting strut towers on both left and right sides at a peripheral edge of an inspection hole 7 of a rear floor 2, buckling resistance directions of the flanges 5, 8 become opposite to each other and torsional rigidity of the whole of the rear floor 2 is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body rear structure, and more particularly to a vehicle body rear structure in which a rear compartment for mounting a power unit such as an engine and a motor control unit is provided below a rear floor.

[0002]

2. Description of the Related Art In a small car, a front compartment formed in front of a passenger compartment is limited to a small size.
It is known that the height of the ground on the rear floor is set high to separate the rear compartment below the rear floor, and the power unit is mounted on the rear compartment.

[0003] When a power unit is mounted in the rear compartment below the rear floor, an inspection hole for maintenance of the power unit and its auxiliary parts may be formed in the rear floor. Since the suspension input is applied from the strut towers arranged on both the left and right sides, it is necessary to secure the rigidity around the rear floor using a reinforcing member made of a frame material, a pipe material, or the like so as to oppose the suspension input ( JP-A-9-230
757, JP-A-9-20276, JP-A-9-20276
-238080).

[0004]

However, when the rigidity around the rear floor is increased by using the reinforcing member made of the frame material or the pipe material as described above, it is necessary to reduce the required weight of the vehicle body. Not only that, it is unavoidable that it is disadvantageous in terms of space and cost.

Accordingly, the present invention provides a vehicle body rear structure which can increase the rigidity around the rear floor without using a dedicated reinforcing member or the like.

[0006]

According to the present invention, notches are formed on both left and right sides of a rear floor which separates a rear compartment on which a power unit and the like are mounted, and struts are formed in the notches. In a vehicle body rear structure in which a tower is fitted and a flange formed by bending the notch periphery is joined to a peripheral side surface of the strut tower,
An inspection hole is formed between the left and right strut towers on the rear floor, and a flange is formed on the periphery of the inspection hole in a direction opposite to the flange on the periphery of the notch.

According to a second aspect of the present invention, the flange at the periphery of the notch portion according to the first aspect is formed upward, while the flange at the periphery of the inspection hole is formed downward, and the inspection hole is formed on the peripheral portion thereof. And closed by a lid which is detachably mounted by a fixing means.

According to a third aspect of the present invention, the fixing means of the second aspect is a mechanical fastening means comprising a plurality of bolts and nuts.

According to the invention of claim 4, claims 2 and 3 are provided.
A reinforcement portion is provided on the lid described in (1).

According to a fifth aspect of the present invention, the reinforcing portion according to the fourth aspect is an embossed portion that is recessed downward in the lid so that a side wall is formed near the flange on the periphery of the inspection hole. Features.

According to a sixth aspect of the present invention, the embossed portion according to the fifth aspect is formed such that a central portion of the lid is entirely recessed while leaving a flat portion on a peripheral portion of the lid. I have.

In the invention of claim 7, claims 1 to 5 are provided.
The power unit described in (1) is mounted to be inclined in the front-rear direction to enlarge the vertical space between the power unit and the rear floor.

According to an eighth aspect of the present invention, the power unit according to the sixth aspect is mounted to be inclined in the front-rear direction to enlarge the vertical space between the power unit and the rear floor, while the embossed portion of the lid is provided. Are formed deeply to the position near the power unit.

[0014]

According to the first aspect of the present invention, the suspension input acts on the rear floor separately from the left and right strut towers, and the suspension input acts as a torsional load on the rear floor in all directions. A flange is bent at the periphery of the inspection hole, and together with the fact that the panel rigidity around the inspection hole is enhanced, the flange around the inspection hole and the strut tower on the left and right sides of the rear floor are fitted. Since the fixed notch portion peripheral flanges are bent in opposite directions to each other, the buckling resistance directions of these flanges are reversed, and the torsional rigidity of the entire rear floor is increased, so that a dedicated reinforcing member is provided. The rigidity of the panel on the rear floor can be ensured without using any other means.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention, the flanges at the peripheral edges of the cutouts on the left and right sides of the rear floor are bent upward, so that the joint work with the peripheral side surfaces of the strut tower may produce a blind spot on the upper side of the rear floor (vehicle compartment side). In addition, the inspection hole can be easily formed, but the flange around the periphery of the inspection hole is bent downward, so that the lid for closing the inspection hole can be disposed almost flush with the rear floor surface, so that the upper part of the lid can be disposed. The feeling of protrusion can be eliminated, and the rigidity of the lid can further increase the panel rigidity of the rear floor.

According to the invention of claim 3, according to claim 2,
In addition to the effect of the invention, the torsional rigidity can be significantly increased since the bolts shear against the torsional load acting on the rear floor at the fixed portion of the lid peripheral edge.

According to the fourth aspect of the present invention, in addition to the effects of the second and third aspects of the present invention, the panel rigidity of the lid itself is enhanced by the reinforcing portion, so that the overall rigidity of the rear floor can be enhanced.

According to the invention set forth in claim 5, according to claim 4,
In addition to the effect of the invention, the reinforcing portion is formed as an embossed portion, so that it is possible to obtain cost and weight advantages without increasing the number of parts, and of course, the side wall of the embossed portion is formed by the inspection hole. Since it is located near the peripheral flange, the torsional rigidity of the peripheral portion of the inspection hole can be remarkably increased.

According to the invention described in claim 6, according to claim 5,
In addition to the effects of the invention, the embossed portion can be effectively used as a container, and convenience can be improved.

According to the invention of claim 7, according to claim 1,
In addition to the effects of the inventions of (1) to (5), the downward projection height of the flange at the periphery of the inspection hole is not restricted to a small extent, and the flange can be bent to a height at which sufficient torsional rigidity is obtained. .

According to the invention of claim 8, according to claim 6,
In addition to the effects of the invention, the projection height of the flange around the periphery of the inspection hole below the flange is not restricted to be small, and the flange can be bent and formed to a height at which sufficient torsional rigidity can be obtained. The volume of the embossed portion of the lid can be increased, and the effect of using the container as a container can be enhanced.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 4 shows a small electric vehicle, in which battery frames BF having a rigid structure exclusively for housing a plurality of batteries for driving a motor are mounted on the lower side of the floor of the vehicle body 1.

The front compartments F and C separated in front of the cabin R are small and constrained.
The rear half 2R of the rear floor 2 behind the rear floor 2 is formed in a large step shape so that the ground height of the rear half 2R of the rear floor 2 is set high. C, and a motor 3A is provided in the rear compartment RC as shown in FIG.
And a power unit 3 including a controller 3B.

The left and right sides of the rear half 2R of the rear floor 2 are formed with notches 4 as shown in FIGS. 1 to 3, and a flange 5 is formed on the peripheral edge thereof by bending upward. A strut tower 6 for connecting and supporting a shock absorber of a rear suspension unit (not shown) is fitted into the notch 4, and the strut tower 6 is fixed by welding the flange 5 to a peripheral surface thereof.

An inspection hole 7 is formed between the left and right cutouts 4 and 4 to be horizontally long, and the power unit 3 mounted on the rear compartment RC and its auxiliary parts (not shown) and the like are formed from the inspection hole 7. Maintenance is performed.

A flange 8 for reinforcement is formed on the periphery of the inspection hole 7 in a direction opposite to the flange 5 on the periphery of the notch, that is, downward.

The inspection hole 7 can be closed by a lid 9, and the lid 9 is detachably mounted on the periphery of the inspection hole 7 by a plurality of bolts and nuts 11 as fixing means.

The lid 9 is provided with a reinforcing portion 10. In this embodiment, the reinforcing portion 10 is formed as an embossed portion which is recessed downward so as to form a side wall 10a near the flange 8 on the periphery of the inspection hole. I have.

The embossed portion 10 is formed such that a flat portion 9a is left at the peripheral edge of the lid 9 so that the center portion of the lid is entirely recessed downward, so that the embossed portion 10 can be effectively used as a container. .

Accordingly, the lid 9 inserts the embossed portion 10 into the inspection hole 7, overlaps the flat portion 9 a of the peripheral portion on the peripheral portion of the inspection hole 7, and mechanically removably attaches the bolt 9 to the nut 11. Has been concluded.

The power unit 3 has a controller 3a.
Is mounted in a rearwardly inclined state in the front-rear direction to enlarge the vertical space between the upper surface and the rear half 2R of the rear floor 2, and the embossed portion 10 of the lid 9 is moved to the front half thereof. It is formed deep in a substantially triangular cross-section so that the bottom surface on the side is parallel and close to the upper surface of the controller 3a.

According to the structure of the above embodiment, since the suspension input acts on the rear half 2R of the rear floor 2 separately from the left and right strut towers 6, the suspension input is applied to the rear half 2R of the rear floor 2 in all directions. Acts as a torsional load.

Since the flange 8 is bent at the periphery of the inspection hole 7 provided in the rear half 2R of the rear floor 2, the rigidity of the panel around the inspection hole 7 is increased, and the inspection is also performed. By forming the flange 8 on the periphery of the hole 7 and the flange 5 on the periphery of the cutouts 4 on both sides to which the strut towers 6 are fitted and fixed in opposite directions, respectively,
Since the buckling resistance directions of the flanges 5 and 8 are reversed and the torsional rigidity of the entire rear half 2R is increased, the panel of the rear half 2R of the rear floor 2 can be used without using a dedicated reinforcing member or the like. Rigidity can be secured.

In particular, in this embodiment, the notch 4
Since the peripheral flange 5 is bent upward, the joining work with the peripheral side surface of the strut tower 6 can be performed on the rear floor 2.
Can be easily formed on the upper side of the vehicle (the side of the cabin R) without producing a blind spot. On the other hand, since the flange 8 on the periphery of the inspection hole 7 is bent downward, the lid 9 for closing the inspection hole 7 can be formed in the rear half of the rear floor 2. Part 2R
The lid 9 can be disposed so as to be substantially flush with the surface, eliminating the feeling of upward protrusion of the lid 9, and further increasing the panel rigidity of the rear half 2R of the rear floor 2 due to the presence of the lid 9. Can be.

In addition, the lid 9 is mechanically fastened detachably to the periphery of the inspection hole 7 by a plurality of bolts and nuts 11 on the periphery of the inspection hole 7.
Since the torsion load acting on the rear half 2R of the rear floor 2 is countered by the shearing force of the plurality of bolts at the fixed portion of the peripheral portion of the lid 9, the torsional rigidity can be significantly increased.

Since the rigidity of the lid 9 increases the panel rigidity of the lid 9 itself, the overall rigidity of the rear half 2R of the rear floor 2 can be further increased.

In particular, since the reinforcing portion 10 is formed as an embossed portion that is recessed downward, the embossed portion can of course be advantageously obtained in terms of cost and weight without increasing the number of parts. Since the side wall 10a of the inspection hole 10 is located near the flange 8 on the periphery of the inspection hole 7, the torsional rigidity of the periphery of the inspection hole 7 can be remarkably increased.

Further, the vertical space between the upper surface of the power unit 3 and the rear half 2R of the rear floor 2 is enlarged by the inclined arrangement of the controller 3b, so that the downward projecting height of the flange 8 is limited. The flange 8 can be bent and formed to a height at which sufficient torsional rigidity can be obtained.

In addition to the above effects on strength and rigidity, the above-mentioned embossed portion 10 is formed by recessing the central portion of the lid 9 as a whole. The embossed portion 10 can be effectively used and the convenience can be enhanced. In addition, since the embossed portion 10 is formed deeply to a position near the controller 3b of the power unit 3 and the volume of the embossed portion 10 is expanded, the embossed portion 10 can be used as a container. The effect can be enhanced.

Although the above embodiment has been described taking a small electric vehicle as an example, it goes without saying that the present invention is not limited to this.

In the above-described embodiment, the lid is formed by press molding. However, the present invention is not limited to this, and the lid can be formed by bending. Further, in the embodiment, bolts and nuts are used for the fixing, but they can be fixed by clipping, a hinge mechanism, or magnetic force.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing an assembled state of FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a schematic side view of a vehicle to which the present invention is applied.

[Explanation of symbols]

 2 Rear floor 3 Power unit 4 Notch 5,8 Flange 6 Strut tower 7 Inspection hole 9 Lid 9a Flat part 10 Embossed part (reinforcement part) 10a Side wall 11 Bolt / nut RC rear compartment

Claims (8)

[Claims] 1. A notch is formed at both left and right sides of a rear floor separating a rear compartment on which a power unit and the like are mounted, and a strut tower is fitted into the notch and a flange is formed on the periphery of the notch by bending. In the rear body structure of the vehicle, which is joined to the peripheral side surface of the strut tower, an inspection hole is formed between the left and right strut towers on the rear floor, and a flange is formed on a periphery of the inspection hole in a direction opposite to a flange of the notch peripheral edge. A rear structure of a vehicle body characterized by being formed by bending. 2. A flange around an edge of a notch is formed upward, while a flange around an edge of an inspection hole is formed downward, and the inspection hole is closed by a lid detachably mounted on the edge of the inspection hole by fixing means. The vehicle body rear structure according to claim 1, wherein: 3. The vehicle body rear structure according to claim 2, wherein said fixing means is mechanical fastening means comprising a plurality of bolts and nuts. 4. The vehicle body rear structure according to claim 2, wherein a reinforcing portion is provided on the lid. 5. The rear body structure of a vehicle according to claim 4, wherein the reinforcing portion is an embossed portion that is recessed downward in the lid so that a side wall is formed near a flange around the inspection hole. . 6. The rear body structure of an automobile according to claim 5, wherein the embossed portion is formed by entirely recessing a central portion of the lid while leaving a flat portion at a peripheral portion of the lid. 7. The rear structure of a vehicle body according to claim 1, wherein the power unit is mounted to be inclined in the front-rear direction to enlarge a space between the power unit and the rear floor in the vertical direction. 8. The power unit according to claim 1, wherein the power unit is mounted obliquely in the front-rear direction to enlarge a vertical space between the power unit and the rear floor, while the embossed portion of the lid is formed deep to a position near the power unit. Item 7. A vehicle body rear structure according to item 6.