JP2000177623A - Structure of rear suspension mounting unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the degree of freedom for layout of a suspension and to control the increase of production cost. SOLUTION: A rear suspension mounting unit is constructed with cross members 13 connecting each one pair of side members installed on the right and left of a body floor panel 1, respectively to a car breadth direction. A lower surface side reinforcement member 16 of about U-shape in cross section inslatted with front and rear unit 14b, 14c attached on the front and rear unit 13a, 13b of the cross members 13 is provided under the cross members 13. A compartment forming reinforcement member 16 to form a fixed space is provided in the cross members 13. Also, reinforcement members 20 in the cross members are installed at about symmetrical positions with the lower surface side reinforcement member 16 in the vertical direction of vehicle holding the cross members 13 between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear suspension mounting structure for a lower structure of a vehicle.

2. Description of the Related Art Conventionally, Japanese Utility Model Laid-Open No. 2-5118 shown in FIG.
A structure such as a rear suspension mounting portion structure described in Japanese Patent Application Publication No. 1 (Kokai) No. 1 is known.

In such a conventional vehicle, the left and right sides of the vehicle are mounted on a floor panel 1 of a vehicle body in the longitudinal direction of the vehicle.
Right side paired side member members 2, 2 are provided. A cross member member 3 is provided between the side member members 2 to extend in the vehicle width direction in the longitudinal direction.
These side member members 2 are connected in the vehicle width direction.

In this prior art, a rear suspension member member 4 for supporting a rear suspension (not shown) is provided.
However, it is mounted near the joint between the side member member 2 and the cross member member 3 with the extension member 5 and the collars 6 and 7 interposed therebetween.

[0004] That is, from below the rear suspension member member 4, bolt members 8, 9 are vertically inserted and screwed to nut members 10, 11, so that the rear suspension member member 4 is attached to the side suspension member 4. It is fixed near the joint between the member member 2 and the cross member member 3.

[0005] In the conventional rear suspension mounting structure constructed as described above, the closed section 12 formed between the extension member 5 and the cross member 3 is formed.
However, the rigidity near the joint between the side member member 2 and the cross member member 3 to which the rear suspension member member 4 is attached is improved to obtain a desired attachment strength.

[0006]

However, in such a conventional rear suspension mounting structure, the center of the cross member 3 in the vehicle width direction is separated from the joint between the side member 2 and the cross member 3. It hardly contributes to the improvement in rigidity in the vicinity.

For this reason, it is difficult to provide a support portion for the rear suspension in the vicinity of the center of the cross member member 3, and it has been difficult to say that the degree of freedom in the layout of the suspension is high.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rear suspension mounting structure capable of solving the above-mentioned problems, increasing the degree of freedom in suspension layout, and improving support rigidity.

[0009]

According to a first aspect of the present invention, a cross member for connecting a pair of left and right side member members provided on a vehicle body floor panel in a vehicle width direction is provided. A rear suspension mounting portion structure comprising a member member and a rear suspension member member mounted on the cross member member, wherein the rear suspension mounting member structure is provided below the cross member member before and before being fixed to the front and rear surfaces of the cross member member. And a rear suspension mounting portion structure provided with a lower surface side reinforcing member having a substantially concave cross section provided with a rear surface portion.

[0010] In the above-mentioned construction, the suspension input is transmitted to the front and rear portions of the cross member member from the front and rear portions of the lower reinforcing member, so that the cross member is transmitted. Dispersed into members.

Therefore, even if the lower reinforcing member is provided below the center of the cross member, the desired rigidity can be exhibited, so that the degree of freedom in the layout of the suspension can be increased.

[0012] According to the second aspect,
2. The rear suspension mounting structure according to claim 1, wherein a compartment forming reinforcing member that forms a predetermined space between the cross member member and the lower surface side reinforcing member is provided between the cross member member and the lower member. And

[0013] In the above construction, the compartment forming reinforcing member is provided between the cross member member and the lower surface side reinforcing member. A predetermined space is formed between the cross member member.

Therefore, even if the compartment forming reinforcing member is provided at the suspension mounting point together with the lower surface side reinforcing member,
The input can be transmitted to the front and rear surfaces of the cross member member and dispersed.

According to the third aspect of the present invention, the reinforcing member in the cross member is provided at a position substantially symmetrical with respect to the lower surface side reinforcing member in the vehicle vertical direction with the cross member member interposed therebetween. A rear suspension mounting structure according to claim 1 or 2.

According to the third aspect of the present invention, the reinforcing member in the cross member is located at a position substantially symmetrical with respect to the lower reinforcing member in the vertical direction of the vehicle with respect to the cross member member. Since it is provided, a closed cross section space having substantially the same area is formed inside and outside the lower surface of the cross member member.

[0017] Therefore, the rigidity of the mounting portion near the center of the cross member member with respect to the upward and downward input can be further improved.

Further, according to the present invention, the fixing point at which the lower surface side reinforcing member and the reinforcing member inside the cross member are fixed to the cross member member is determined from a suspension mounting point to a vehicle width. 4. The rear suspension mounting structure according to claim 1, wherein the rear suspension mounting structure is offset in the direction.

According to the fourth aspect of the present invention, the fixing point at which the lower surface side reinforcing member and the reinforcing member inside the cross member are fixed to the cross member member is shifted from the suspension mounting point to the vehicle. Since it is offset in the width direction, for example, by extending and fixing the lower surface side reinforcing member and the compartment forming reinforcing member to a portion where deformation does not occur, an input from the suspension is input to the front of the cross member member. It can be transmitted to the rear part.

According to a fifth aspect of the present invention, the compartment-forming reinforcing member has an embossed portion that protrudes and separates at a corner of the lower surface side reinforcing member. A rear suspension mounting structure according to any one of the preceding claims.

According to the fifth aspect of the present invention, the embossed portion formed by bulging and separating the compartment forming reinforcing member is formed at a corner portion of the lower surface side reinforcing member, thereby directly forming the embossed portion. By transmitting the suspension input to the front and rear portions of the cross member member, a desired support rigidity can be obtained.

According to the sixth aspect of the present invention, the compartment forming reinforcing member located in the vicinity of the peripheral component of the cross member member is located on the vehicle outside than the vehicle outside end of the lower surface side reinforcing member. It has a projecting portion that is protruded, and the projecting portion has
The rear suspension mounting structure according to any one of claims 2 to 5, wherein the foreign matter preventing flange is formed upward.

According to the sixth aspect of the present invention, there is provided a fuel tank, a pipe for fuel and the like, a harness, a parking brake cable, and the like, which are located in the vicinity of peripheral parts arranged around the cross member member. Since the chamber forming reinforcing member has a projecting portion projecting outward from the vehicle outer side end of the lower surface side reinforcing member, the suspension mounting point of the lower surface side reinforcing member is located near the peripheral component. By positioning a gap between the lower surface side reinforcing member and the cross member member, the input of the suspension in the in-plane and outer directions along the vertical direction of the lower surface portion of the lower surface side reinforcing member is reduced. The desired rigidity can be obtained by transmitting the force to the front and rear surfaces.

[0024] Further, since the foreign matter preventing flange portion is formed on the protruding portion so as to face upward, the foreign material can be removed from the space formed between the lower surface side reinforcing member and the cross member member. Thus, the possibility of entering the lower surface side reinforcing member can be reduced.

Further, even if the foreign matter preventing flange portion of the projecting portion interferes with the peripheral component, the foreign matter preventing flange portion is formed upward, so that the peripheral component is prevented from being damaged. You.

Further, according to the seventh aspect of the present invention, the cross member member has a bolt relief hole for the rear suspension member member mounting bolt. It is characterized by the rear suspension mounting structure described.

According to the seventh aspect of the present invention, the cross member member has a bolt escape hole for the rear suspension member member mounting bolt. For this reason, at the time of electrodeposition coating, the electrodeposition paint enters the inside of the cross member through the bolt relief hole, and the electrodeposition paint satisfactorily flows.

Further, the cross member is lightened at a portion where the influence of the suspension input is small, so that the weight can be reduced.

[0029]

First Embodiment A first embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 11 show a rear suspension mounting structure according to a first embodiment of the present invention.
Parts that are the same as or equivalent to those in the conventional example will be described with the same reference numerals.

First, the structure will be described. In the first embodiment, a pair of left and right side member members 2 and 2 are provided on a floor panel 1 of a vehicle body along the longitudinal direction in the vehicle longitudinal direction. Is provided. A cross member 13 extending along the vehicle width direction is provided between the side member members 2, 2, and these side member members 2, 2 are connected in the vehicle width direction.

The cross member 13 has a substantially inverted hat shape in cross section, and has front and rear surfaces 13b, 13c extending from a bottom surface 13a arranged substantially parallel to the floor panel 1. From the front and rear portions 13b and 13c,
The front and rear flanges 13d and 13e extend forward and rearward by a predetermined width, and the front and rear flanges 13d and 13e are fixed to the lower surface 1a of the floor panel 1. Have been.

In the vicinity of the center of the bottom portion 13a of the cross member 13 in the vehicle width direction, a bolt escape hole 13 is provided.
f, 13f are formed.

Further, a pair of tank mounting holes 13g, 13g are formed in the vicinity of both end portions 13h, 13h on the vehicle outer side of the bottom surface portion 13a of the cross member member 13.

Below the cross member member 13, a lower surface side reinforcing member 14 is provided.

The lower surface side reinforcing member 14 has a bottom surface portion 14a arranged substantially parallel to the floor panel 1 and extends from the bottom surface portion 14a to form front and rear surface portions 13b, 13c of the cross member member 13. Before being fixed to the rear surface 14
b, 14c, and has a substantially U-shaped cross section, and is used as a fixing point in the front of the cross member member 13, before being welded to the rear surfaces 13b, 13c, and in the rear surfaces 14b, 14c. The welding points 14h are, as shown in FIG. 4, the suspension attachment points (the center positions of the weld nuts 17, 17).
Is offset in the vehicle width direction.

Bolt insertion openings 14d, 14d are formed in the bottom surface portion 14a of the lower surface side reinforcing member 14.

As shown in FIG. 1, an opening 14f spaced a predetermined distance from the lower surface 13a of the cross member 13 is formed at an end 14e of the lower reinforcing member 14 on the side of the fuel tank mounting band. Is formed.

The other end 14g of the lower reinforcing member 14 is connected to the cross member 13 as shown in FIG.
Is fixed to the lower surface portion 13a, and the fixing point of the other end portion 14g is offset in the vehicle width direction from the suspension attachment point.

The cross member member 1 is provided between the cross member member 13 and the lower reinforcing member 14.
A partition formation reinforcing member 16 that forms a predetermined space 15 between the first and second members 3 is provided.

The compartment forming reinforcement member 16 has a substantially U-shaped cross section, and has a bottom portion 16a arranged substantially parallel to the floor panel 1, and extends upward from the bottom portion 14a. The front and rear surfaces 16b and 16c are provided along the front and rear surfaces 13b and 13c.

As shown in FIG. 1, an end 14e of the lower surface side reinforcing member 14 on the side where the fuel tank mounting band is provided is attached to the end 16d on the side where the fuel tank mounting band is provided. A protruding portion 16e is formed so as to protrude from the opening 14f toward the outside of the vehicle.

The projecting portion 16e is formed with a foreign matter preventing flange portion 16f facing upward. The foreign matter preventing flange portion 16f has a substantially U-shape in a top view integrally with the front surface portion 16b and the rear surface portion 16c of the partition wall forming reinforcing member 16 and has a predetermined rigidity. It is provided at a fixed distance from the lower surface.

Further, bolt insertion openings 16g, 16g are formed in the bottom surface portion 16a at positions matching the bolt insertion openings 14d, 14d, and the inner peripheral side edges of the bolt insertion openings 16g, 16g are formed. Weld nuts 17, 17 are attached to the parts.

Then, the rear suspension member member 18 constituting the rear suspension is connected to the bolt member 19,
19, it is attached to the bottom surface portion 14a and is attached to and supported by the cross member member 13 via the lower surface side reinforcing member 14.

As shown in FIG. 7, the compartment forming reinforcing member 16 has a bottom surface portion 14a of the lower surface side reinforcing member 14 and a front and rear surface portion 1 near the suspension mounting point.
4b, 14c and corner portion 14i
In addition, embossed portions 16h, 16h are formed which bulge out and are separated from each other.

Further, in the cross member member 13,
A cross-member reinforcing member 20 is provided at a position that is substantially symmetrical with the lower surface side reinforcing member 14 in the vehicle vertical direction.

The cross member reinforcing member 20 has a substantially U-shaped cross section, and has a bottom surface 20a disposed substantially parallel to the floor panel 1, and extends upward from the bottom surface 20a. The front and rear portions 13b, 13
Before and after c, rear surface portions 20b and 20c are provided.

The cross member reinforcing member 20
Are joined to the outer end portions 13h, 13h of the bottom surface 13a of the cross member member 13 and the pair of tank mounting holes 13g, 13g of the outer end portions 20d, 20d. The tank mounting holes 20e, 20e are formed at positions matching with the above.

Further, weld nuts 21 and 21 are previously mounted on the inner peripheral side peripheral portions of the tank mounting holes 20e and 20e. A mounting piece 23a provided at an end of a mounting band 23 for mounting a fuel tank 22 as shown in FIG.
It is configured to be fixed to g, 20e using bolt members 24, 24 inserted from below the cross member member 13.

Next, the operation of the first embodiment will be described.

In the first embodiment, the suspension input transmitted by the rear suspension member 18 is applied to the front and rear portions 14 of the lower side reinforcing member 14.
b, 14c, the front part 1 of the cross member 13
3b, and is transmitted to the rear surface portion 13c and dispersed to the cross member member 14.

For this reason, even if the lower surface side reinforcing member 14 is provided below the center position of the cross member member 14, the desired rigidity can be exhibited, and the degree of freedom in the layout of the suspension can be increased. .

Further, in the first embodiment, since the above-mentioned collar or the like is not required unlike the conventional case, there is also obtained a secondary effect that the number of parts can be reduced and an increase in manufacturing cost can be suppressed.

Further, the compartment forming reinforcing member 16 is provided between the cross member member 13 and the lower surface side reinforcing member 14, and is provided between the compartment forming reinforcing member 16 and the cross member member 13. A predetermined space is formed.

Therefore, even if the compartment forming reinforcing member 16 is provided together with the lower surface side reinforcing member 14 at the suspension mounting point, the input is not transmitted to the bottom portion 13a of the cross member member 13 as an in-plane / outward direction input. The suspension input can be transmitted to the front and rear surfaces 13b and 13c of the cross member member 13 and dispersed.

Further, a fixing point to which the lower surface side reinforcing member 14 is fixed with respect to the cross member member 13 is offset in a vehicle width direction from a suspension mounting point. In the first embodiment, as shown in FIG. 4, the other end 1 of the lower surface side reinforcing member 14 extends to a portion where no deformation occurs.
4g, the front and rear surface portions 14b and 14c of the lower surface side reinforcing member 14, and the cross member member 1
3, a welding point 14 connecting the front and rear surfaces 13b and 13c.
h are also offset in the vehicle width direction.

Further, the reinforcing member 20 in the cross member
Also, up to the portion where the deformation does not occur, both end portions 20d, 2 on the outer side of the vehicle.
0d is extended and fixed.

Therefore, the input from the suspension is not transmitted as the input in the in-plane or out-of-plane direction of the bottom portion 13 a of the cross member member 13.
The light can be transmitted to the rear surfaces 13b and 13c.

The reinforcing member 20 in the cross member
Is provided at a position which is substantially symmetrical with respect to the lower surface side reinforcing member 14 in the vehicle vertical direction with the cross member member 13 interposed therebetween. A cross-sectional space is formed.

For this reason, the cross member 1
The rigidity of the suspension mounting portion in the vicinity of the center position 3 with respect to upward and downward input can be improved.

As shown in FIG. 7, embossed portions 16h, 16h are formed at the corners 14i, 14i of the lower surface side reinforcing member 14 to bulge and separate the compartment forming reinforcing member 15. As a result, the suspension input at the suspension attachment point is directly transmitted to the front and rear surfaces 13a, 13b of the cross member member 13 via the embossed portions 16h, 16h.
Desired support rigidity can be obtained.

In particular, in the first embodiment, the embossed portions 16h and 16h are located near the suspension mounting point.
Since h is formed, the input can be transmitted more effectively.

The compartment forming reinforcing member 16 located on the side of the cross member member 13 on which the fuel tank mounting band is disposed is located closer to the end 14e of the lower surface side reinforcing member 14 on the side where the fuel tank mounting band is disposed. A protruding portion 16e is provided toward the outside of the vehicle.

The protruding portion 16c is connected to the lower reinforcing member 1
4 and the cross member member 13, the tip end of the foreign matter preventing flange portion 16 f protrudes from the opening 14 f formed between the cross member member 13 and the lower surface side of the cross member member 13.

Therefore, even if the suspension mounting point of the lower surface side reinforcing member 14 is located at the end 14e on the side where the fuel tank mounting band is provided, the lower surface side reinforcing member 1 can be mounted.
4 and the cross member member 13, the suspension input in the in-plane and out-of-plane directions along the vertical direction of the bottom surface portion 14 a of the lower surface side reinforcing member 14 is provided in front of the cross member member 13. , To the rear surfaces 13b, 13c to obtain a desired support rigidity.

Accordingly, also in this respect, the degree of freedom in the layout of the suspension can be increased.

Also, since the projection 16e is formed with the foreign matter preventing flange 16f facing upward, the space formed between the lower surface side reinforcing member 14 and the cross member 13 is formed. The possibility that foreign matter enters the lower surface side reinforcing member 14 from the opening 14f can be reduced.

Further, even if the foreign substance preventing flange 16f of the projection 16e interferes with the mounting band 23 of the fuel tank 22, the foreign substance preventing flange 16f
Is formed facing upward, so that the mounting band 2
3 is prevented.

Further, the cross member member 13 is provided with the bolt relief holes 13f, 13f. For this reason, at the time of electrodeposition coating, the electrodeposition coating material is used for these bolt relief holes 1.
The electrodeposition paint enters the inside of the cross member member 13 via 3f and 13f, and the electrodeposition paint is satisfactorily applied.

Further, the cross member member 13 is lightened at a portion where the influence of the suspension input is small, so that the weight can be reduced.

Although the first embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to the first embodiment, and there are design changes and the like that do not depart from the gist of the present invention. Even this is included in the present invention.

For example, in the first embodiment, the mounting piece 23a provided at the end of the mounting band 23 for mounting the fuel tank 22 is fixed by the bolt member 24. However, the present invention is not limited to this. It may be fixed in any way, such as by locking an end to the bottom surface 13a of the cross member member 13.

[0074]

As described above, according to the first aspect of the present invention, the suspension input is transmitted to the front and rear portions of the cross member from the front and rear portions of the lower reinforcing member. , Distributed to the cross member member.

For this reason, even if the lower reinforcing member is provided below the center of the cross member, the desired rigidity can be exhibited, and the degree of freedom in the layout of the suspension can be increased.

And, according to the second aspect,
The compartment forming reinforcing member is provided between the cross member member and the lower surface side reinforcing member, and a predetermined space is formed between the compartment forming reinforcing member and the cross member member.

Therefore, even if the compartment forming reinforcing member is provided together with the lower surface side reinforcing member at the suspension mounting point,
The input can be transmitted to the front and rear surfaces of the cross member member and dispersed.

According to the third aspect of the present invention, the reinforcing member in the cross member is provided at a position substantially symmetrical with the lower reinforcing member in the vehicle vertical direction with the cross member member interposed therebetween. Therefore, a closed cross-sectional space having substantially the same area is formed inside and outside the lower surface of the cross member member.

For this reason, it is possible to further improve the rigidity of the mounting portion near the center position of the cross member member against upward and downward input.

Further, according to the fourth aspect of the present invention, a fixing point at which the lower surface side reinforcing member and the reinforcing member inside the cross member are fixed to the cross member member is from a suspension mounting point to a vehicle width direction. For example, by extending and fixing the lower surface side reinforcing member and the compartment forming reinforcing member to a portion where deformation does not occur, the input from the suspension can be input to the front and rear portions of the cross member member. Can be transmitted to

According to the fifth aspect of the present invention, the suspension input member is directly formed by forming an embossed portion in which the compartment forming reinforcing member is bulged and separated at a corner portion of the lower surface side reinforcing member. Is transmitted to the front and rear portions of the cross member member to obtain a desired support rigidity.

According to the sixth aspect of the present invention, the compartment is located near a peripheral component disposed around the cross member, such as a fuel tank, a pipe for fuel or the like, a harness, a parking brake cable, and the like. Since the reinforcing member has a protruding portion that protrudes outward from the vehicle outer side end of the lower surface side reinforcing member, the suspension attachment point of the lower surface side reinforcing member is located near the peripheral component. hand,
By forming an interval between the lower surface side reinforcing member and the cross member member, a suspension input in an in-plane / outward direction along a vertical direction of the lower surface side reinforcing member lower surface portion can be provided before and after the cross member member. The desired support rigidity can be obtained by transmitting to the surface.

Further, since the foreign matter preventing flange portion is formed upward on the protruding portion, the foreign matter can be removed from the space formed between the lower surface side reinforcing member and the cross member member. Thus, the possibility of entering the lower surface side reinforcing member can be reduced.

Further, even if the foreign matter preventing flange of the projecting portion interferes with the peripheral part, the foreign matter preventing flange is formed upward, so that the peripheral part is prevented from being damaged. You.

Further, according to the seventh aspect of the present invention, the cross member member has a bolt relief hole for the bolt for mounting the rear suspension member member. For this reason, at the time of electrodeposition coating, the electrodeposition paint enters the inside of the cross member through the bolt relief hole, and the electrodeposition paint satisfactorily flows.

Further, the cross member member can be reduced in weight at a portion where the influence of the suspension input is small, thereby achieving a practically useful effect that the weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a configuration of a main part in a rear suspension mounting portion structure according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a vehicle illustrating an entire configuration of the rear suspension mounting portion structure according to the first embodiment.

FIG. 3 is a top view of a cross member member in the rear suspension mounting portion structure according to the first embodiment.

FIG. 4 is a rear view of the cross member member in the rear suspension mounting portion structure of the first embodiment.

FIG. 5 is a rear view of a main part of the rear suspension mounting portion structure according to the first embodiment.

6 is a cross-sectional view of the rear suspension mounting structure according to the first embodiment, taken along a line AA in FIG. 5;

7 is a cross-sectional view of the rear suspension mounting structure according to the first embodiment, taken along a line BB in FIG. 5;

FIG. 8 is a cross-sectional view of the rear suspension mounting structure according to the first embodiment, taken along a line CC in FIG. 5;

FIG. 9 is a top view of the rear wheel peripheral edge of the rear suspension mounting structure according to the first embodiment.

FIG. 10 is a front view of the periphery of the rear wheel of the vehicle in the rear suspension mounting portion structure according to the first embodiment.

FIG. 11 is a cross-sectional view of the rear suspension mounting structure according to the first embodiment, taken along a line DD in FIG. 9;

FIG. 12 shows a conventional rear suspension mounting structure.
It is sectional drawing along the vehicle width direction of the junction part of a side member and a cross member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Floor panel 2 Side member member 13 Cross member member 13f Bolt escape hole 14 Lower surface side reinforcing member 14e Fixed side end of fuel tank mounting band side 14g Other end 14h Welding point 14i Corner 16 Reinforcement member for forming compartment 16e Projection Installation part 16f Foreign matter prevention flange 16h Embossed part 18 Rear suspension member member 20 Cross member reinforcement member 22 Fuel tank (peripheral parts) 23 Mounting band

Claims (7)

[Claims] 1. A rear suspension mounting portion comprising a cross member member for connecting a pair of left and right side member members provided on a vehicle body floor panel in a vehicle width direction, and a rear suspension member member being mounted on the cross member member. A lower surface side reinforcing member having a substantially concave cross section and having a front surface portion and a rear surface portion provided below and before the cross member member. Characteristic rear suspension mounting structure. 2. A cross-section forming reinforcing member which forms a predetermined space between the cross member member and the lower surface side reinforcing member is provided between the cross member member and the lower member. 2. The rear suspension mounting structure according to claim 1. 3. A position substantially symmetrical with respect to the lower surface side reinforcing member in the vehicle vertical direction with the cross member member interposed therebetween.
3. The rear suspension mounting structure according to claim 1, further comprising a cross member reinforcing member. 4. A fixing point at which the lower surface side reinforcing member and the reinforcing member inside the cross member are fixed to the cross member member is offset in a vehicle width direction from a suspension mounting point. The rear suspension mounting part structure according to any one of claims 1 to 3. 5. The compartment-forming reinforcing member according to claim 2, further comprising an embossed portion that bulges away at a corner of the lower surface side reinforcing member. Rear suspension mounting structure. 6. The compartment forming reinforcing member located in the vicinity of a peripheral component of the cross member member has a projecting portion projecting outward from a side end of the lower surface side reinforcing member on the vehicle side. The rear suspension mounting part structure according to any one of claims 2 to 5, wherein the part has a foreign matter preventing flange part formed upward. 7. The rear suspension mounting according to claim 2, wherein a bolt relief hole of the rear suspension member mounting bolt is formed in the cross member. Part structure.