JP2022112307A - suspension frame structure - Google Patents

Abstract

To provide a suspension frame structure which can secure the high rigidity with respect to an input load from a suspension and improve the steering stability and NVH performance.SOLUTION: A suspension frame 1 comprises: a frame body part 10 which extends in the vehicle width direction; and a pair of right and left brace parts 20 which connects the frame body part 10 and a vehicle body. The brace part 20 comprises: a bottom surface part 21 which extends in the vehicle cross direction; and an inner sidewall part 22 and an outer sidewall part 23 which respectively extend to the vehicle upper side from both sides in the vehicle width direction of the bottom surface part 21. An interval between the inner sidewall part 22 and the outer sidewall part 23 is formed to be wider as approaching the side of the frame body part 10 from the side of the vehicle body. The inner sidewall part 22 is formed such that the upper side part is located on the inner side in the vehicle width direction with respect to a lower side part and the height in the vehicle vertical direction and the width in the vehicle width direction of an inclined surface connecting the upper side part and the lower side part increase as approaching the side of the frame body part 10.SELECTED DRAWING: Figure 2

Description

The present invention relates to a suspension frame structure.

A suspension frame to which a front suspension of a vehicle is attached is connected to the vehicle body and has a role of receiving a load from the suspension and holding the suspension in a predetermined position. As a conventional suspension frame structure, for example, Patent Document 1 discloses a structure in which suspension members corresponding to the suspension frame are attached to side members of a lower vehicle body via left and right spacers. The spacer in this conventional structure has an extension portion extending forward of the vehicle from a portion forming a bolt hole for fixing to the side member, and at least a portion other than the extension portion is welded to the suspension member.

JP 2020-011533 A

However, in the conventional structure described above, steering stability performance and NVH (noise, vibration, harshness) performance deteriorate due to deformation of the spacer that occurs when the suspension frame (suspension member) receives a load from the suspension. There was a possibility that it would be lost.

Specifically, in the conventional structure, when the suspension frame receives a lateral load from the suspension, the spacer on the opposite side of the load input point bends and deforms. Further, when the suspension frame receives a load in the longitudinal direction from the suspension, the spacer on the same side as the load input point bends and deforms. If the bending deformation of the spacer increases due to the load input from the suspension, the suspension geometry will change while the vehicle is running, deteriorating the steering stability performance, and increasing the vibration input will degrade the NVH performance. become.

In order for the suspension frame to hold the suspension efficiently, it is necessary to reduce the bending deformation of the spacer as described above. However, there is a possibility that the spacer in the conventional structure cannot sufficiently prevent bending deformation due to lack of rigidity, and there is room for improvement.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide a suspension frame structure capable of ensuring high rigidity against an input load from the suspension and improving steering stability performance and NVH performance. is to provide

In order to achieve the above object, the present invention provides a frame main body portion extending in the vehicle width direction, and a pair of right and left frame main body portions arranged on both sides of the frame main body portion on the vehicle rear side in the vehicle width direction to connect the frame main body portion and the vehicle body. and a brace portion. In this suspension frame structure, the brace portion has a bottom portion extending in the vehicle front-rear direction, and an inner wall portion and an outer wall portion extending upward of the vehicle from both sides of the bottom portion in the vehicle width direction. A space between the inner wall portion and the outer wall portion is formed so as to widen from the vehicle body side toward the frame main body side. In the inner wall portion, an upper side portion extending in the vehicle front-rear direction is positioned more inward in the vehicle width direction than a lower side portion extending in the vehicle front-rear direction, and an inclined surface connecting the upper side portion and the lower side portion in the vehicle vertical direction. The height and the width in the vehicle width direction of the frame are formed so as to increase toward the side of the frame main body.

According to the suspension frame structure of the present invention, the rigidity of the brace portion is increased, and the position of the frame main body portion is less likely to shift with respect to the input load from the suspension, so steering stability performance and NVH performance can be improved. .

1 is a perspective view of a vehicle to which a suspension frame structure according to an embodiment of the present invention is applied, viewed obliquely from below on the left side; FIG. It is the perspective view which looked at the suspension frame in FIG. 1 from the vehicle rear side diagonally upper direction. It is the perspective view which looked at the suspension frame in FIG. 1 from the vehicle rear side diagonally downward direction. FIG. 3 is an enlarged perspective view showing the periphery of the brace portion on the right side in FIG. 2 ; FIG. 4 is an enlarged perspective view showing the periphery of the right brace portion in FIG. 3 ; FIG. 5 is a side view of the periphery of the right brace portion in FIG. 4 as seen from the inside in the vehicle width direction; FIG. 6 is a cross-sectional view taken along the line AA in FIG. 5; FIG. 6 is a cross-sectional view taken along the line BB in FIG. 5; FIG. 6 is a sectional view taken along line CC in FIG. 5;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 9 show a suspension frame structure according to one embodiment of the invention. In the drawings, the direction of arrow Fr indicates the front in the longitudinal direction of the vehicle, the direction of arrow U indicates the upper direction in the vertical direction of the vehicle, the direction of arrow L indicates the left in the width direction of the vehicle, and the direction of arrow R indicates the width direction of the vehicle. pointing to the right. Also, "left and right" in the description of the embodiment correspond to the left and right when the front is viewed from the vehicle interior.

A vehicle to which the suspension frame structure according to the present embodiment is applied has, as shown in FIG. 1, a suspension frame 1 on the vehicle lower side of a power unit room P arranged in the front part of the vehicle. In the power unit room P, a pair of front side members 2 extending in the longitudinal direction of the vehicle are arranged on both left and right sides. equipment is provided. A dash panel (not shown) is provided on the vehicle rear side of the power unit room P, and the power unit room P and the vehicle room R are partitioned by the dash panel. A floor portion of the vehicle compartment R is provided with a pair of left and right floor side members 3 extending in the longitudinal direction of the vehicle, and a floor panel 4 joined to the floor side members 3 . The floor side members 3 and the floor panel 4 form part of the vehicle body and have high rigidity.

As shown in FIGS. 1 to 3, the suspension frame 1 includes a frame main body portion 10 extending in the vehicle width direction, and a pair of left and right brace portions 20 connecting the frame main body portion 10 and the vehicle body. The pair of left and right brace portions 20 are arranged on both sides of the frame main body portion 10 in the vehicle width direction on the vehicle rear side. The brace portion 20 corresponds to the spacer in the conventional structure described above. In this embodiment, the frame main body 10 and the left and right floor side members 3 (vehicle body) are connected by the left and right brace portions 20 .

Hereinafter, detailed structures of the frame main body portion 10 and the brace portion 20 in the suspension frame 1 of the present embodiment will be described.

As shown in FIGS. 2 and 3, the frame main body 10 has a predetermined longitudinal length and extends in the vehicle width direction. The frame main body 10 includes front projecting portions 11 projecting forward of the vehicle from front portions at both ends in the vehicle width direction, and obliquely extending toward the rear of the vehicle from rear portions at both ends in the vehicle width direction toward the outside in the vehicle width direction. and an outer extension 12 which is in contact with. A left suspension arm (not shown) is attached to the left front protrusion 11 and the outer extension 12 . A right suspension arm (not shown) is attached to the right front protrusion 11 and the outer extension 12 . A front suspension of the vehicle is connected to the suspension arm. The frame main body 10 supports the front suspension via suspension arms.

The frame main body 10 has a predetermined thickness in the vertical direction of the vehicle, and has a front wall surface portion 13 facing the front of the vehicle and a rear wall surface portion 14 facing the rear of the vehicle. The front wall surface portion 13 protrudes downward in the vehicle from the front end of the upper surface 15 of the frame main body portion 10 and extends in the vehicle width direction across the left and right front protruding portions 11 . The rear wall surface portion 14 protrudes downward in the vehicle from the rear end of the upper surface 15 of the frame body portion 10 and extends in the vehicle width direction across the left and right outer extension portions 12 . Although detailed description is omitted, the frame main body 10 is composed of an upper portion forming an upper surface 15 and a lower portion forming a lower surface 16 and on which mechanical parts (not shown) are installed.

A vehicle body connecting member 17 is provided on each of the left and right front projecting portions 11 of the frame body portion 10 . The vehicle body connecting member 17 extends from the frame main body 10 toward the upper side of the vehicle, and has a tip curved outward in the vehicle width direction. ). Front end portions of a pair of left and right brace portions 20 are joined to respective vehicle rear portions of the left and right outer extension portions 12 of the frame main body portion 10 .

As shown in FIGS. 2 and 3 , each of the pair of left and right brace portions 20 includes a bottom surface portion 21 extending in the vehicle front-rear direction and inner wall portions extending upward from the vehicle width direction side portions of the bottom surface portion 21 . 22 and an outer wall portion 23 . Each brace portion 20 has a symmetrical structure. Therefore, the right brace portion 20 will be described in detail below with reference to FIGS. 4 to 9, and the description of the left brace portion 20 will be omitted.

4 to 6 are enlarged views of the right brace portion 20 and its surroundings. FIG. 4 is a perspective view seen obliquely from the rear side of the vehicle, and FIG. 5 is a view seen obliquely from the rear side of the vehicle. 6 is a side view seen from the inside in the vehicle width direction. 7 to 9 show cross-sectional views of the right brace portion 20. FIG. 7 is a cross-sectional view along line AA in FIG. 5, and FIG. 8 is a cross-sectional view along line BB in FIG. , and FIG. 9 is a sectional view taken along line CC of FIG.

As shown in FIGS. 4 and 5, the brace portion 20 is arranged such that the distance between the inner wall portion 22 and the outer wall portion 23 widens as the floor side member 3 (vehicle body) side approaches the frame body portion 10 side. is formed in That is, in the brace portion 20 of the present embodiment, the space between the inner wall portion 22 and the outer wall portion 23 is relatively narrower toward the rear side of the vehicle and relatively wider toward the front side of the vehicle.

As shown in FIGS. 4 to 8, the inner wall portion 22 of the brace portion 20 has an upper side portion 22a and a lower side portion 22b extending in the longitudinal direction of the vehicle. In the inner wall portion 22, the upper side portion 22a is located inside the lower side portion 22b in the vehicle width direction, and the height of the inclined surface 22c connecting the upper side portion 22a and the lower side portion 22b in the vehicle vertical direction and the vehicle height. The width in the width direction is formed so as to increase toward the side of the frame body portion 10 . In other words, the inclined surface 22c of the inner wall portion 22 in the present embodiment extends at an angle inward in the vehicle width direction from the lower side portion 22b toward the upper side of the vehicle, and the distance from the lower side portion 22b to the upper side portion 22a ( The length of the oblique side) is relatively shorter toward the rear side of the vehicle and relatively longer toward the front side of the vehicle. As shown in FIGS. 4 to 6, the front portion of the inner wall portion 22 is joined to the vehicle width direction inner portion of the rear wall surface of the outer extension portion 12 of the frame body portion 10 . The front end upper portion of the inner wall portion 22 may extend to the upper surface 15 of the frame main body portion 10 and be joined to the upper surface 15 .

An upper side portion 22a of the inner wall portion 22 is formed substantially linearly in a vehicle side view (FIG. 6) in accordance with the shape of the lower surface portion of the floor side member 3 to which the brace portion 20 is fixed. In addition, the inner wall portion 22 has an inner flange portion 22d that protrudes inward in the vehicle width direction from the upper side portion 22a. The upper surface of the inner flange portion 22d contacts the lower surface portion of the floor side member 3 when the brace portion 20 is fixed to the floor side member 3. As shown in FIG. The protruding length of the inner flange portion 22d is longer than the protruding length of an outer flange portion 23d of the outer wall portion 23, which will be described later. Specifically, the protrusion length of the inner flange portion 22d is preferably 19 mm or more, for example.

As shown in FIGS. 4 to 8, the outer wall portion 23 of the brace portion 20 has an upper side portion 23a and a lower side portion 23b extending in the longitudinal direction of the vehicle. The outer wall portion 23 is arranged such that the upper side portion 23a and the lower side portion 23b generally overlap when viewed from the top of the vehicle. It is formed at an angle close to perpendicular to the direction. The height of the vertical surface 23c in the vertical direction of the vehicle is formed so as to increase toward the frame main body 10 side. In other words, the vertical surface 23c of the outer wall portion 23 in this embodiment extends upward from the lower side portion 23b, and the height from the lower side portion 23b to the upper side portion 23a is relatively lower toward the rear side of the vehicle. It is relatively higher toward the front side of the vehicle. As shown in FIGS. 4 to 6, the front end portion of the outer wall portion 23 is joined to the vehicle width direction outer end portion of the rear wall surface of the outer extension portion 12 of the frame body portion 10 .

An upper side portion 23a of the outer wall portion 23 is formed in a generally linear shape in a vehicle side view (FIG. 6) in accordance with the shape of the lower surface portion of the floor side member 3 to which the brace portion 20 is fixed. Further, the outer wall portion 23 has an outer flange portion 23d that protrudes outward in the vehicle width direction from the upper side portion 23a. The upper surface of the outer flange portion 23 d contacts the lower surface portion of the floor side member 3 when the brace portion 20 is fixed to the floor side member 3 . The protrusion length of the outer flange portion 23 d is shorter than the protrusion length of the inner flange portion 22 d of the inner wall portion 22 .

As shown in FIGS. 4 and 5, the bottom surface portion 21 of the brace portion 20 is positioned between the lower side portion 22b of the inner wall portion 22 and the lower side portion 23b of the outer wall portion 23, and has a width in the vehicle width direction of the frame. It is formed so as to become wider as it approaches the body portion 10 side. The front end portion 21a of the bottom surface portion 21 is joined to the lower surface 16 of the frame body portion 10, as shown in FIGS.

As shown in FIGS. 4, 5, 8 and 9, a vehicle body fixing portion 21b fixed to the floor side member 3 (vehicle body) is provided at the rear portion of the bottom portion 21. As shown in FIGS. The vehicle body fixing portion 21b has, for example, a bolt hole penetrating through the bottom portion 21. As shown in FIG. The brace portion 20 is fixed to the lower surface portion of the floor side member 3 with bolts through bosses, brackets, or the like (not shown) using bolt holes of the vehicle body fixing portion 21b. In addition, a convex portion 21c that protrudes toward the vehicle lower side and extends in the vehicle front-rear direction is provided at the center portion of the bottom surface portion 21 in the vehicle width direction. The rigidity of the bottom surface portion 21 is enhanced by the convex portion 21c.

As shown in FIGS. 5, 7 and 8, inner bead portions 24 extending in the vehicle front-rear direction are formed at the corners of the bottom surface portion 21 and the inner wall portion 22 of the brace portion 20 . An outer bead portion 25 extending in the vehicle front-rear direction is also formed at a corner portion between the bottom surface portion 21 and the outer wall portion 23 . In this embodiment, the inner bead portion 24 and the outer bead portion 25 have a shape that protrudes toward the vehicle lower side. A rear bead portion 26 connects the rear end of the inner bead portion 24 and the rear end of the outer bead portion 25 .

As shown in FIGS. 5 and 9, the rear bead portion 26 extends in a curved line along the rear end of the bottom surface portion 21 and has a shape that protrudes toward the vehicle lower side. The rear bead portion 26 is provided so as to surround the rear half portion of the fixed seat surface around the bolt hole in the vehicle body fixing portion 21b of the bottom portion 21 . That is, in the brace portion 20 of the present embodiment, the inner bead portion 24, the outer bead portion 25, and the rear bead portion 26 are continuous to form a U-shaped bead when viewed from the bottom of the vehicle. The rear portion of the inner bead portion 24, the rear portion of the outer bead portion 25, and the rear bead portion 26 of the U-shaped bead surround the vehicle body fixing portion 21b of the bottom portion 21. As shown in FIG.

Further, the brace portion 20 in the present embodiment is positioned so as to overlap the vehicle body fixing portion 21b of the bottom surface portion 21 in the vehicle side view (the position of the BB line in FIG. 5), as shown in FIG. and the outer wall portion 23 are formed such that the height Y in the vehicle vertical direction is equal to or greater than 1/4 of the width X of the bottom surface portion 21 in the vehicle width direction (Y≧X/4). In the present embodiment, the width X of the bottom surface portion 21 in the vehicle width direction is the length between both ends of the bottom surface portion 21 in the vehicle width direction. 23b. The height Y of the inner wall portion 22 in the vertical direction of the vehicle corresponds to the height including the inner bead portion 24, that is, the distance from the upper side portion 22a of the inner wall portion 22 to the tip of the inner bead portion 24. there is Similarly, the height Y of the outer wall portion 23 in the vertical direction of the vehicle corresponds to the distance from the upper side portion 23 a of the outer wall portion 23 to the tip of the outer bead portion 25 . The height Y of the inner wall portion 22 and the outer wall portion 23 is substantially the same at the position overlapping the vehicle body fixing portion 21b in the vehicle side view. A specific value of the height Y is preferably 17 mm or more, for example.

Next, the operation of the suspension frame structure according to this embodiment will be described.
In the suspension frame 1 having the structure described above, loads from the left and right front suspensions of the vehicle are input to both sides of the frame main body 10 in the vehicle width direction through the suspension arms. The input load to the frame main body 10 is transmitted to the floor side members 3 via the left and right braces 20 joined to the vehicle rear side of the frame main body 10, and is transmitted to the front protruding portion 11 of the frame main body 10. It is also transmitted to the front side members 2 via the left and right vehicle body connecting members 17 provided in the .

Focusing on transmission of load from the frame main body 10 to the left and right braces 20, when the frame main body 10 receives a load in the left-right direction from the suspension, the brace 20 located on the opposite side of the load input point , the load is input. Also, when the frame body 10 receives a load in the longitudinal direction from the suspension, the load is input to the brace 20 on the same side as the load input point.

At this time, the space between the inner wall portion 22 and the outer wall portion 23 of the brace portion 20 is formed so as to widen as it approaches the frame main body portion 10 side from the floor side member 3 (vehicle body) side. The portion 20 can efficiently transmit the load input from the frame body portion 10 to the floor side member 3 . In particular, in the present embodiment, the upper side portion 22a of the inner wall portion 22 and the upper side portion 23a of the outer wall portion 23 are formed substantially linearly when viewed from the side of the vehicle. , 23a to the floor side member 3 without concentrating on a specific portion.

In addition, the inner wall portion 22 of the brace portion 20 in this embodiment has an inclined surface 22c inclined inward in the vehicle width direction, and the height of the inclined surface 22c in the vertical direction of the vehicle and the width in the vehicle width direction of the frame body It is formed so as to increase toward the portion 10 side. As a result, even if a load is input from the frame main body 10 to the inner wall portion 22 of the brace portion 20 in either the front-rear direction or the left-right direction, the load is applied in the shearing direction of the inclined surface 22c of the inner wall portion 22. It is possible to receive Therefore, the inner wall portion 22 is less likely to be deformed, and the rigidity of the brace portion 20 can be improved.

Therefore, according to the suspension frame 1 of the present embodiment, the position of the frame main body 10 is less likely to deviate with respect to the input load from the suspension, so that steering stability performance and NVH performance can be improved.

Further, in the suspension frame 1 of the present embodiment, the inner flange portion 22d of the inner wall portion 22 of the brace portion 20 protrudes longer than the outer flange portion 23d of the outer wall portion 23 protrudes. . As a result, the resistance against the load that tends to bend and deform the inner wall portion 22 is increased, so that the inner wall portion 22 of the brace portion 20 is more difficult to deform. In particular, if the protruding length of the inner flange portion 22d is set to 19 mm or more, it is possible to effectively increase the above drag force.

Further, in the brace portion 20 according to the present embodiment, the height Y of each of the inner wall portion 22 and the outer wall portion 23 in the vertical direction of the vehicle is equal to the vehicle width of the bottom portion 21 at the position overlapping the vehicle body fixing portion 21b in the vehicle side view. It is formed to be 1/4 or more of the width X in the direction. In this way, since the heights of the inner wall portion 22 and the outer wall portion 23 satisfy the condition Y≧X/4 at the rear portion of the brace portion 20 where the vehicle body fixing portion 21b is provided, the inner wall portion 22 In addition, since the outer wall portion 23 has a sufficient height in the entire longitudinal direction of the brace portion 20, deformation of the brace portion 20 in the vehicle vertical direction is less likely to occur. In particular, if the height Y of the inner wall portion 22 and the outer wall portion 23 is set to 17 mm or more, it is possible to effectively suppress deformation in the vertical direction of the vehicle. As a result, steering stability performance and NVH performance can be further improved.

In addition, in the suspension frame 1 of the present embodiment, the brace portion 20 has an inner bead portion 24, an outer bead portion 25, and a rear bead portion 26, and a U-shaped bead formed by connecting these in a top view. The inner wall portion 22 and the outer wall portion 23 are connected with each other. As a result, the inner wall portion 22 and the outer wall portion 23 are less likely to deform, and torsional deformation of the brace portion 20 is less likely to occur, so that the rigidity of the brace portion 20 can be further increased. In addition, since the rear portion of the inner bead portion 24, the rear portion of the outer bead portion 25, and the rear bead portion 26 surround the vehicle body fixing portion 21b of the bottom portion 21, the periphery of the vehicle body fixing portion 21b is also difficult to deform. Therefore, the position of the frame main body 10 is less likely to shift with respect to the input load from the suspension, so that the steering stability performance and the NVH performance can be further improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes are possible based on the technical idea of the present invention. For example, in the above-described embodiment, an example in which the frame main body 10 and the floor side member 3 are connected by the brace portion 20 has been described. can be

Further, in the above-described embodiment, an example in which the rear end of the inner bead portion 24 and the rear end of the outer bead portion 25 are connected by the rear bead portion 26 was shown. It is also possible to form the bead portion 24 and the outer bead portion 25 in a discontinuous manner, or to have the brace portion 20 without such beads.

DESCRIPTION OF SYMBOLS 1... Suspension frame 2... Front side member 3... Floor side member 4... Floor panel 10... Frame body part 11... Front side protrusion part 12... Outside extension part 13... Front wall part 14... Rear wall part 15... Upper surface 16... Lower surface 17 Vehicle body connecting member 20 Brace part 21 Bottom part 21a Front end part 21b Vehicle body fixing part 21c Convex part 22 Inner wall part 22a Upper side part 22b Lower side part 22c Inclined surface 22d Inner flange part 23 Outer wall portion 23a Upper side portion 23b Lower side portion 23c Vertical surface 23d Outer flange portion 24 Inner bead portion 25 Outer bead portion 26 Rear bead portion P Power unit room R Vehicle compartment X Width of bottom portion Y: height of inner wall and outer wall

Claims (4)

A suspension frame comprising: a frame body portion extending in a vehicle width direction; and a pair of left and right brace portions arranged on vehicle rear sides of both vehicle width direction side portions of the frame body portion and connecting the frame body portion and a vehicle body. in structure,
The brace portion has a bottom portion extending in the vehicle front-rear direction, and an inner wall portion and an outer wall portion extending upward of the vehicle from both sides of the bottom portion in the vehicle width direction. The distance from the wall portion is formed so as to widen as it approaches the frame main body side from the vehicle body side,
In the inner wall portion, an upper side portion extending in the vehicle front-rear direction is positioned more inward in the vehicle width direction than a lower side portion extending in the vehicle front-rear direction, and an inclined surface connecting the upper side portion and the lower side portion in the vehicle vertical direction. A suspension frame structure, wherein the height and the width in the vehicle width direction of the suspension frame are formed so as to increase toward the side of the frame main body. The inner wall portion has an inner flange portion that protrudes inward in the vehicle width direction from the upper side portion,
The outer wall portion has an outer flange portion projecting outward in the vehicle width direction from an upper side portion extending in the vehicle front-rear direction,
The protrusion length of the inner flange portion in the vehicle width direction is formed to be longer than the protrusion length of the outer flange portion in the vehicle width direction,
The suspension frame structure according to claim 1, characterized in that: The brace portion has a vehicle body fixing portion that is provided at a rear portion of the bottom portion and is fixed to the vehicle body. 3. The suspension frame structure according to claim 1 or 2, wherein the height in the vertical direction of the vehicle is 1/4 or more of the width of the bottom portion in the vehicle width direction. The brace portion
a vehicle body fixing portion provided at a rear portion of the bottom portion and fixed to the vehicle body;
an inner bead portion formed at a corner portion between the bottom surface portion and the inner wall portion and extending in the vehicle front-rear direction;
an outer bead portion formed at a corner portion between the bottom surface portion and the outer wall portion and extending in the vehicle front-rear direction;
a rear bead portion connecting the rear end of the inner bead portion and the rear end of the outer bead portion;
a rear portion of the inner bead portion, a rear portion of the outer bead portion, and a rear bead portion surround the vehicle body fixing portion;
The suspension frame structure according to any one of claims 1 to 3, characterized in that:

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