JP2000211552A - Strut support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a sufficient strut support rigidity by connecting a front part for forming a strut bracket, a strut support surface, and a front end and a rear end of an arch-shaped reinforcement part having a U shaped section continuously formed over each edge of a rear face part to a side frame, respectively. SOLUTION: In a strut bracket 10, flanges 13b, 13c formed in a bent manner at a lower edge of a front face part 13 and flanges 14b, 14c formed at a lower edge of a rear face part 14 are overlappedly welded to an upper face 5 and an outer face 3 of a side frame 2, respectively, and a connection part 12a of an inner surface part 12 is overlappedly welded to an inner face 4 of the side frame 2. Further, flanges 23, 24 formed in a bent manner in the vicinity of both ends of a second reinforcement face 22 are overlappedly welded to an outer face 3 of the side frame 2. With the constitution, the shape of the bracket 10 is limited to ensure the rigidity, thereby surely dispersing a strut load to the side frame 2 and ensure a sufficient support rigidity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strut support structure for a McPherson strut type suspension for suspending wheels of a vehicle on a chassis frame.

[0002]

2. Description of the Related Art A McPherson type suspension for supporting a wheel, for example, a front wheel, on a side frame of a chassis frame has a built-in shock absorber, a strut having a spring attached thereto is arranged vertically, and an upper end of the strut is erected on the side frame. The strut bracket is attached to the lower strut bracket, and the lower end is supported by the lower arm, so that the strut load repeatedly input to the strut from the wheel is transmitted to the side frame via the strut bracket and received.

Next, an example of a strut support structure for transmitting a strut load repeatedly input to struts from wheels to a side frame will be described with reference to an exploded perspective view of a main part shown in FIG. The arrow Ft indicates a forward direction of the vehicle body, and the arrow OUT indicates a direction outside the vehicle width.

[0004] In the drawing, reference numeral 101 denotes a side frame having a substantially rectangular cross section extending along the front and rear direction of the vehicle body at the side of the vehicle body.
Strut bracket 10 supporting the upper end of strut
2 are welded together and the inner surface 10 of the side frame 101 is
A reinforcement 103 is provided between the strut bracket 102 and the upper surface 101c and the upper surface 101c.

[0005] The strut bracket 102 has an inner surface portion 102a whose lower end is branched and welded to the outer surface 101a of the side frame 101, and a bent outer portion of the vehicle body along the front edge of the inner surface portion 102a. A substantially triangular front portion 102b that approaches the outside of the vehicle body as the
A substantially triangular-shaped rear surface portion 102c which is bent outwardly of the vehicle body along the rear edge of the internal surface portion 102a and moves toward the outside of the vehicle body as it moves upward, an inner surface portion 102a and a front surface portion 10
2b and a strut support surface 102d which is provided on the upper end edge of the rear surface portion 102c and closes the upper portion and supports the upper end of a strut (not shown). A flange 102e is provided on the outer edge reaching the rear surface 102c via the surface 102d.
Is formed so that the flange 102e is coupled to a wheel apron (not shown).

On the other hand, the reinforcement 103 is formed by bending an inner surface portion 103a whose lower end is welded to the inner surface 101b of the side frame 101 to the outside of the vehicle body along a front edge and a rear edge of the inner surface portion 103a. The strut bracket 102 has a substantially U-shaped cross section having a front surface 103b and a rear surface 103c joined to a front surface 102b and a rear surface 102c of the strut bracket 102. The upper end of the inner surface 103a is joined to the inner surface 102a of the strut bracket 102. As well as
Flanges 103 connected to the upper surface 101c of the side frame 101 are provided at lower ends of the front portion 103b and the rear portion 103c.
d and 103e are formed, and the inner surface 101b and the upper surface 101c of the side frame 101 and the inner surface 102a, the front surface 102b, and the rear surface 10 of the strut bracket 102 are formed.
The rigidity of the strut bracket 102 is secured by joining the strut bracket 102 with the reinforcement 2c.

Further, the lower end 103g of the reinforcement 103 is extended and connected to the cross member 104 as shown in Japanese Utility Model Application Laid-Open No. 60-54607 and denoted by reference numerals in FIG. There is a strut support structure for efficiently distributing and transmitting the strut load input to the strut bracket 102 to the cross member 104 via the reinforcement 103 to the chassis frame.

[0008]

FIG. 6 and FIG.
According to the strut support structure disclosed in Japanese Patent Application Laid-Open No. 0-54607, the side frame 101 is formed by the strut bracket 102 for supporting the upper end of the strut and the reinforcement 103 for reinforcing the bracket 102, on both the outer surface 101 a and the inner surface 101 b. Since it is connected to the side frame 101 so as to be sandwiched between the bracket 102 and the side frame 101, the bonding strength between the bracket 102 and the side frame 101 can be secured.

However, the strut support surface 102d extends from the open front surface 102b of the strut bracket 102.
Formed on the rear surface portion 102c through the
Since 2e is substantially flat and formed only on the upper part, in order to obtain sufficient rigidity of the bracket 102, the thickness of the entire bracket 102 must be increased, and the weight and manufacturing cost increase.

Also, since a large reinforce 103 is required to improve the rigidity of the strut bracket 102, a large occupied space is required, the structure of the strut support structure is complicated, and there is a concern that the manufacturing cost may increase. .

Accordingly, it is an object of the present invention to provide a strut support structure capable of securing sufficient strut support rigidity, simplifying the configuration, and reducing the manufacturing cost. It is in.

[0012]

According to a first aspect of the present invention, there is provided a strut support structure for supporting a strut upper end of a strut type suspension by a strut bracket erected on a side frame of a chassis frame. In the structure, the strut bracket has a substantially U-shaped or U-shaped cross section having a front portion and a rear surface portion respectively extending from a front edge and a rear edge of an inner surface portion located inside the vehicle body to an outer side of the vehicle body, A bracket body whose upper part is closed by a strut support surface that supports the upper end of the strut and that is open to the outside and below the vehicle body; and an integral part of the bracket body, from the edge of the front part to the end of the strut support surface It is continuously formed in a U-shape in cross section over the edge of the rear surface portion via the edge, and the front end and the rear end are each formed with a side flange. Characterized by comprising a arched reinforcing portion coupled to the over arm.

According to the first aspect of the present invention, the front end and the rear end of the U-shaped cross-section reinforcing portion formed continuously over the respective edges of the front surface, the strut support surface, and the rear surface forming the strut bracket. Since each end is connected to the side frame, the shape of the strut bracket is constrained and rigidity is improved. In particular, the strut support surface that supports the upper end of the strut is firmly connected to the side frame by the arch-shaped reinforcement. As a result, sufficient surface rigidity is secured.

As a result, the strut load input from the repetitive strut is reliably dispersed and transmitted to the side frame via the strut bracket, so that a particularly sufficient strut support rigidity is secured and the running stability is improved.

Further, since sufficient strut rigidity can be obtained by the arch-shaped reinforcing portion formed on the bracket body, the reinforcement provided between the side frame for stiffening the strut bracket and the strut bracket is eliminated or the reinforcement is eliminated. The reinforcement can be simplified, the structure of the strut support structure can be simplified, and the manufacturing cost can be reduced.

According to a second aspect of the present invention, in the strut support structure of the first aspect, the bracket body has a lower end of the bracket body connected to a side frame.

According to the second aspect of the present invention, in addition to the first aspect, by connecting the lower end of the bracket body to the side frame, the rigidity of the connection between the strut bracket and the side frame is further improved. The deformation of the bracket is suppressed, and the strut support rigidity is further improved.

According to a third aspect of the present invention, in the strut support structure according to the first or second aspect, the side frame has an outer surface and an inner surface which are arranged to face each other, and a space between upper ends of the outer surface and the inner surface. It has a substantially rectangular cross section extending in the vehicle front-rear direction with an upper surface to be connected and a lower surface to connect between each lower edge of the outer surface and the inner surface. A front end and a rear end are respectively coupled to the outer side surface of the side frame, and the bracket body has a coupling portion formed at a lower portion of the inner surface portion coupled to an inner side surface of the side frame. Each lower edge is coupled to the upper surface of the side frame.

According to the third aspect of the present invention, both ends of the arch-shaped reinforcing portion are connected to the outer surface of the side frame having a substantially rectangular cross section, and the inner surface of the bracket body is connected to the inner surface of the side frame. Since each lower edge of the rear surface portion is connected to the upper surface of the side frame, the side frame is connected so as to be sandwiched between the arch-shaped reinforcing portion and the inner surface. As a result, the side frame and the strut bracket are more firmly connected to each other to secure the connection rigidity, and the rigidity of the strut bracket is improved, so that the strut support rigidity is more reliable.

According to a fourth aspect of the present invention, in the strut support structure of the third aspect, the front and rear portions of the bracket main body have lower edges of the front and rear portions respectively connected to the upper surface of the side frame. And is coupled to the outer surface of the side frame.

According to the fourth aspect of the present invention, in addition to the third aspect, the lower edges of the front and rear portions of the bracket main body are also connected to the outer surface and the upper surface of the side frame. The connection strength between the front and rear portions is increased, the connection rigidity between the side frame and the strut bracket is further secured, and the rigidity of the strut bracket is improved, so that the strut support rigidity is further improved.

According to a fifth aspect of the present invention, in the strut support structure of the first to fourth aspects, the arch-shaped reinforcing portion is
A front portion, a strut support surface, and a rear surface portion of the bracket main body; and a first reinforcing surface that is continuously formed by being bent over each edge of the front portion, the strut support surface, and the rear surface portion,
The first reinforcing surface is formed in a substantially U-shaped cross section by the second reinforcing surface bent along the edge of the first reinforcing surface.

According to a fifth aspect of the present invention, the arch-shaped reinforcing portion is embodied, and includes a front portion, a strut support surface, and a rear portion of the bracket body, and ends of the front portion, the strut support surface, and the rear portion. Since it is formed by the first reinforcing portion bent along the edge and the second reinforcing portion bent along the edge of the first reinforcing portion, it is compact and easily formed by press forming or the like when forming the strut bracket. Can be formed.

According to a sixth aspect of the present invention, in the strut support structure of the fifth aspect, connecting portions are formed near both ends of the second reinforcing surface so as to be connected to the outer surface of the side frame. I do.

According to the sixth aspect of the present invention, since the connecting portions are formed near both ends of the second reinforcing surface, the connecting between the arch-shaped reinforcing portion and the side frame is easily and reliably performed.

According to a seventh aspect of the present invention, there is provided a strut support structure for supporting a strut upper end of a strut type suspension by a strut bracket erected on a side frame of a chassis frame, wherein the side frames are opposed to each other. A substantially rectangular cross section extending in the front-rear direction of the vehicle body having an outer surface and an inner surface, an upper surface connecting between the upper edges of the outer surface and the inner surface, and a lower surface connecting the lower edges of the outer surface and the inner surface. The strut bracket has a substantially U-shaped or U-shaped cross-section having a front portion and a rear surface portion respectively extending outward from the front and rear edges of an inner surface portion located inside the vehicle body. The upper part is closed by a strut support surface that supports the upper end of the strut, the outside and the lower part of the vehicle body are opened, and the lower end is the side frame. Characterized in that it each coupled to the outer surface and inner surface of the arm.

According to the seventh aspect of the present invention, the side frame is sandwiched between the lower ends of the strut brackets, and the strut bracket and the side frame are connected. Therefore, the connection rigidity between the strut bracket and the side frame and the rigidity of the strut bracket are provided. And the strut supporting rigidity is sufficiently obtained.

According to an eighth aspect of the present invention, in the strut structure of the seventh aspect, the strut bracket has a joint formed at a lower portion of the inner surface of the strut bracket and is joined to an inner surface of the side frame. The lower edges of the front and rear portions are coupled to the outer surface of the side frame.

According to the eighth aspect of the present invention, the connecting portion formed below the inner surface of the strut bracket is connected to the inner surface of the side frame, and the lower edges of the front and rear surfaces are connected to the outer surface of the side frame. Thereby, the deformation of the strut bracket is suppressed, and the connection rigidity between the side frame and the strut bracket is secured, so that the strut support rigidity is further improved.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a strut support structure according to the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing a main part of a chassis frame on which the strut support structure of the present embodiment is disposed, FIG. 2 is an exploded perspective view of a portion A in FIG. 1, and FIG. I
FIG. 4 is a sectional view taken along the line II-II in FIG. 2, FIG.
FIGS. 3A and 3B are a sectional view taken along line III-III and a sectional view taken along line IV-IV of FIG. 2 in a state where the strut bracket and the side frame are connected. 6 and 7, the arrow Ft in the drawings indicates the front direction of the vehicle body, and the arrow OUT indicates the direction outside the vehicle width.

The chassis frame 1 has a pair of side frames 2 extending in the front-rear direction of the vehicle along the left and right sides of the vehicle, and a plurality of cross members 8 are installed between the left and right side frames 2. In a ladder-shaped frame, strut support structures for supporting upper ends of struts (not shown) of a front suspension are respectively provided on left and right side frames 2.

Hereinafter, the strut support structures provided on the left side frame 2 will be mainly described because the left and right strut support structures are symmetrical and have the same configuration and function.

The side frame 2 to which the strut bracket 10 forming the strut support structure is attached is
As shown in FIG. 2, the outer surface 3, the inner surface 4 opposed to the outer surface 3, the upper surface 5 connecting between the upper edges of the outer surface 3 and the inner surface 4, and each of the outer surface 3 and the inner surface 4 It has a lower surface 6 connecting the lower edges and is formed in a substantially rectangular cross section extending in the front-rear direction of the vehicle body.

The strut bracket 10 includes an inner surface portion 12 disposed inside the vehicle body, a front portion 13 extending outward from the front edge of the inner surface portion 12 and the vehicle body from a rear edge of the inner surface portion 12. And a bracket body 11 having a strut support surface 15 which is provided on the upper edge of the inner surface portion 12, the front surface portion 13, and the rear surface portion 14 and supports the upper portion of the strut.

The inner surface 12 of the bracket body 11
A connecting portion 12a to be welded to the inner surface 4 of the side frame 2 is extended at a lower portion, and a lower edge of the connecting portion 12a secures a welding length with the inner surface 4 of the side frame 2 and has a sufficient bonding strength. The waveform is branched as provided.

The front portion 13 is formed along the front edge of the inner surface portion 12 so as to be bent outwardly of the vehicle body and to extend further outward than the outer side surface 3 of the side frame 2 in the vehicle width direction. The rear surface portion 14 is formed to bend outwardly of the vehicle body along the rear edge of the inner surface portion 12, face the front surface portion 13, and reach further outside in the vehicle width direction than the outer side surface 3 of the side frame 2; In addition, extending portions 13a and 14a extending downward along the outer surface 3 of the side frame 2 are formed at lower portions of the front portion 13 and the rear portion 14, respectively, and lower edges of the front portion 13 and the rear portion 14 are formed. Are flanges 13b, 13c and 14 which are welded to the outer surface 3 and the upper surface 5 of the side frame 2, respectively.
b and 14c are respectively bent.

Further, the strut support surface 15 is formed at the upper end edges of the inner surface portion 12, the front surface portion 13, and the rear surface portion 14 to close the upper portion and support the upper end of the strut (not shown). These inner surface 12 and front 1
3. The bracket body 11 which has a substantially U-shaped cross section and has a substantially U-shaped cross-section, which is open at the outer side and the lower side of the vehicle body for accommodating the upper portion of the strut by the rear surface portion 14 and the strut support surface 15, is provided. Has formed.

An arch-shaped first reinforcing surface 21 extending from the lower edge of the front surface portion 13 to the lower edge of the rear surface portion 14 through the edge of the strut support surface 15 is continuously bent and formed. A second reinforcing surface 22 that is bent inward in the vehicle width direction along the outer peripheral edge of the reinforcing surface 21 is extended, and these front portions 13,
Strut support surface 15, rear surface portion 14, first reinforcing surface 21
And the second reinforcing surface 22 form an arch-shaped reinforcing portion 20 having a substantially U-shaped cross section from the lower end of the edge of the front portion 13 to the lower end of the edge of the rear portion 14 via the edge of the strut support surface 15. Have been.

In the vicinity of both ends of the second reinforcing surface 22, flanges 23 and 24 which are overlapped with the outer surface 3 of the side frame 2 and welded to the side frame 2 are formed in a bent shape, and the first reinforcing surface 22 is formed. It is formed so as to be superimposed and welded to a wheel apron (not shown).

The strut bracket 10 constructed as described above has flanges 13b and 13c bent at the lower edge of the front portion 13 and 14 formed at the lower edge of the rear portion 14.
b and 14c are overlapped and welded to the upper surface 5 and the outer surface 3 of the side frame 2, respectively, and the joint 12a of the inner surface 12 is overlapped and welded to the inner surface 4 of the side frame 2; The flanges 23 and 24 bent near both ends of the second reinforcing surface 22 are overlapped on the outer surface 3 of the side frame 2 and welded and connected to the side frame 2 to weld the second reinforcing surface 22 to the wheel apron. By coupling, it is coupled to the wheel apron.

According to the strut support structure formed as described above, the front portion 13 of the bracket main body 11 that is opened,
An arch-shaped reinforcement portion 20 having a substantially U-shaped cross section is formed to extend along the outer edge of the strut support surface 15 and the rear surface portion 14 to form outer edge portions of the front portion 13, the strut support surface 15, and the rear surface portion 14. Strut bracket 1 with high rigidity
The shape of 0 is constrained.

In addition, as shown in FIG. 5 (a), the vicinity of the front end of the arch-shaped reinforcing portion 20 is an extended portion 13a formed on the front portion 13 of the strut bracket 10 and the first reinforcing portion 21.
And the second reinforcing portion 22 continuously forms a substantially U-shaped cross section, and is connected to the outer surface 3 of the side frame 2 by the extending portion 13a and the flanges 13c and 23 formed on the second reinforcing portion 22. While being firmly coupled to the frame 2, the rear end has an extended portion 14a formed on the rear surface portion 14 of the strut bracket 10 as shown in FIG. 5B, a first reinforcing portion 21, and a second reinforcing portion 22. With the substantially U-shaped cross section continuously maintained, the extending portion 14a
The rigidity of the strut bracket 10 is sufficiently secured by being firmly connected to the side frame 2 by being connected to the outer side surface 3 of the side frame 2 by the flanges 14c and 24 formed on the second reinforcing portion 22, and particularly to the strut. The surface rigidity of the strut support surface 15 to which the load is input is improved.

Further, the lower edges of the front portion 13 and the rear portion 14 of the strut bracket 10 are formed by flanges 13b, 13b, respectively.
c, 14b, and 14c, the upper surface 5 and the outer surface 3 of the side frame 2 are joined together over the two surfaces, and the strength of the connection between the front portion 13 and the rear portion 14 and the side frame 2 and the rigidity of the front portion 13 and the rear portion 14 Is secured, and the inner surface 1
2 is joined to the inner side surface 4 of the side frame 2 with a sufficient welding length, so that the lower part of the strut bracket 10 extends from the outer side surface 3 of the side frame 2 to the upper surface 5 so that the side frame 2 is sandwiched. Coupled with the continuous welding connection over the inner surface 4 via
The connection rigidity between the strut bracket 10 and the side frame 2 is sufficiently ensured.

Therefore, the strut load repeatedly input from the strut can be reliably transmitted to the side frame 2 via the strut bracket 10 having the secured rigidity, and the strut supporting rigidity is obtained. Stability is sufficiently ensured.

Further, since the rigidity of the strut bracket 10 is ensured, and the strength of the connection between the strut bracket 10 and the side frame 2 is sufficiently ensured, the reinforcement or the like can be eliminated. Front portion 13 of bracket body 11, strut support surface 1
5, the rear surface portion 14, the front reinforcement portion 13, the strut support surface 15, and the first reinforcing portion 21 formed by bending along the edge of the rear surface portion 14; and the bent portion formed along the edge of the first reinforcement portion 21. Since the strut bracket 10 is formed by the second reinforcing portion 22, the structure of the strut support structure is simplified, and the strut bracket 10 can be easily formed by press molding or the like at the time of forming the strut bracket 10. As a result, manufacturing costs can be reduced by reducing machining costs, man-hours required for assembly during assembly, equipment such as jigs for assembly, etc., and also reduce the weight of the strut support structure and, consequently, the weight of the vehicle. Is brought about.

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the spirit of the present invention. For example, the rigidity of the strut bracket 10 and the strut bracket 10 and the chassis frame can be changed as required. A reinforcement may be added between the strut bracket 10 and the chassis frame 1 in order to ensure the connection rigidity with the first and the like more reliably. In this case, the reinforcement should be simple. Can be.

[0048]

According to the strut support structure described above, the front end and the rear end of the arch-shaped reinforcing portion are continuously formed in a U-shape in cross section over the respective edges of the front portion, the strut support surface, and the rear portion of the strut bracket. By connecting the strut brackets to the side frames, the strut bracket shape is constrained and rigidity is improved. Distributed transmission to the frame is ensured, and strut support rigidity is ensured.

Further, since sufficient strut rigidity can be obtained by the arch-shaped reinforcing portion formed on the bracket body, the reinforcement for improving the rigidity of the strut bracket can be eliminated or the reinforcement can be simplified. The structure of the strut support structure can be simplified and the manufacturing cost can be reduced.

Further, by connecting the lower portion of the strut bracket to the outer side surface and the inner side surface of the side frame so as to sandwich the side frame, the deformation of the strut bracket is more reliably suppressed, and the connection between the side frame and the strut bracket is further improved. Stiffness is more reliably achieved, resulting in increased strut support stiffness.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chassis frame showing an outline of an embodiment of a strut support structure according to the present invention.

FIG. 2 is an exploded perspective view showing a main part of the embodiment.

FIG. 3 is a sectional view taken along line II of FIG. 2;

FIG. 4 is a sectional view taken along line II-II of FIG. 2;

5 (a) and 5 (b) are explanatory views showing a connection state between a side frame and a strut bracket.
FIG. 4 is a sectional view taken along the line III-III of FIG. 2 and IV in a state where the side frame and the strut bracket are combined.
FIG. 4 is a sectional view taken along line IV.

FIG. 6 is an exploded perspective view showing a main part of a conventional strut support structure.

FIG. 7 is a sectional view showing a main part of a conventional strut support structure.

[Description of Signs] 1 Chassis frame 2 Side frame 3 Outer surface 4 Inner surface 5 Upper surface 6 Lower surface 10 Strut bracket 11 Bracket body 12 Inner surface portion 12a Joining portion 13 Front portion 13a Extension portion 13b Flange (joining portion) 13c Flange (joining portion) Part) 14 rear surface part 14a extension part 14b flange (connection part) 14c flange (connection part) 15 strut support surface 20 arch-shaped reinforcement part 21 first reinforcement surface 22 second reinforcement surface 23 flange (connection part) 24 flange (connection) Part)

Claims (8)

[Claims] 1. A strut support structure for supporting an upper end of a strut of a strut type suspension by a strut bracket erected on a side frame of a chassis frame, wherein the strut bracket includes a front edge and a rear edge of an inner surface located inside a vehicle body. A cross-section substantially U having a front portion and a rear portion each extending outwardly of the vehicle body.
A bracket body having a U-shape or a U-shape, the upper part of which is closed by a strut support surface that supports the upper end of the strut, and which is open to the outside and below the vehicle body; An arc-shaped reinforcing portion which is continuously formed in a U-shape in cross section from the edge to the edge of the rear surface portion through the edge of the strut support surface, and wherein the front end and the rear end are respectively connected to the side frames. A strut support structure. 2. The strut support structure according to claim 1, wherein a lower end of the bracket body is coupled to a side frame. 3. The side frame includes an outer surface and an inner surface which are arranged to face each other, an upper surface connecting between the upper edges of the outer surface and the inner surface, and a lower surface connecting between the lower edges of the outer surface and the inner surface. A cross section extending in the vehicle front-rear direction and having a substantially rectangular cross-section, wherein the arch-shaped reinforcing portion has a front end and a rear end of the arch-shaped reinforcing portion each coupled to the outer surface of a side frame; The main body is characterized in that a coupling portion formed at a lower portion of the inner surface portion is coupled to an inner surface of the side frame, and lower edges of the front surface portion and the rear surface portion are respectively coupled to an upper surface of the side frame. The strut support structure according to claim 1 or 2, wherein 4. A front part and a rear part of the bracket body, wherein lower edges of the front part and the rear part are respectively coupled to an upper surface of the side frame and to an outer surface of the side frame. The strut support structure according to claim 3, wherein 5. The arch-shaped reinforcing portion is formed continuously by being bent over a front portion, a strut support surface, and a rear surface portion of the bracket body, and each edge of the front surface portion, the strut support surface, and the rear surface portion. The first reinforcing surface formed and a second reinforcing surface bent along an edge of the first reinforcing surface are formed to have a substantially U-shaped cross section. The strut support structure as described. 6. The strut support structure according to claim 5, wherein a coupling portion coupled to an outer surface of the side frame is formed near both ends of the second reinforcing surface. 7. A strut support structure for supporting an upper end of a strut of a strut type suspension by a strut bracket erected on a side frame of a chassis frame, wherein the side frame comprises: an outer surface and an inner surface which are arranged to face each other; The strut bracket has a substantially rectangular cross section extending in the vehicle front-rear direction with an upper surface connecting between upper end edges of the inner side surface and a lower surface connecting between lower end edges of the outer side surface and the inner side surface. A substantially U-shaped cross section having a front portion and a rear portion extending from the front edge and the rear edge of the inner surface located inside the vehicle to the vehicle outer side, respectively.
A strut supporting surface for supporting the upper end of the strut, the upper and lower sides of the strut are closed, and the outer side and the lower side of the vehicle body are opened, and the lower end is connected to the outer side surface and the inner side surface of the side frame, respectively. A strut support structure. 8. The strut bracket, wherein a coupling portion formed below the inner surface of the strut bracket is coupled to an inner surface of the side frame, and lower edges of the front and rear surfaces are formed on outer surfaces of the side frame. The strut structure according to claim 7, wherein the strut structure is connected to the strut.