JP6930477B2 - Vehicle frame structure - Google Patents

Description

The present invention relates to a vehicle frame structure.

In a vehicle such as a small automobile, a vehicle in which the skeleton of the body is composed of a tubular member (for example, a round steel pipe) is known (see, for example, Patent Document 1). In the vehicle described in Patent Document 1, a front pillar portion extending in the vertical direction in front of the driver's seat, a roof side rail extending in the front-rear direction above the cabin, and a roof side rail extending in the vertical direction behind the driver's seat are provided on both sides of the body skeleton, respectively. The rear pillar portion and the lower frame extending in the front-rear direction at the lower part of the vehicle are arranged so as to form an annular shape.

Japanese Unexamined Patent Publication No. 2011-46242

The vehicle basically has a structure in which an impact load due to a collision is received by a body skeleton made of a tubular member. Therefore, compared to a vehicle having a structure capable of receiving an impact load on a relatively large surface (for example, a monocoque body), it is difficult to disperse the collision load in the vehicle body, and the shape of the entire body due to the impact load (for example, a monocoque body). It can be said that the structure is difficult to suppress deformation (including the outer shape of the annular portion on both sides of the body skeleton).

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a frame structure of a vehicle capable of suitably suppressing deformation of the entire body due to a collision load.

The vehicle frame structure for solving the above problems is composed of a tubular pipe material, a front pillar portion extending in the vertical direction at the front part of the vehicle, a roof side rail extending in the front-rear direction at the upper part of the vehicle, and extending in the vertical direction at the rear part of the vehicle. It has a body skeleton that constitutes the rear pillar portion and a lower frame that extends in the front-rear direction at the lower part of the vehicle, and the front pillar portion, the roof side rail, the rear pillar portion, and a part of the lower frame are annular. In the frame structure of the vehicle in which the body skeleton is fixed to the lower frame, at least one of the front pillar portion and the rear pillar portion forms a convex shape protruding toward the end side in the front-rear direction of the vehicle. It has a bent portion bent as described above, and the bent portion is provided with a connecting member for integrally connecting a portion on the upper side and a portion on the lower side of the tip on the end side.

In the above configuration, when an impact load is applied to the tip of the bent portion of the body skeleton at the time of a vehicle collision, a force that deforms the bent portion so as to open in the vertical direction acts. According to the above configuration, since the connecting member is provided in such a bent portion, it is possible to suppress the bending portion from being deformed so as to open due to the action of tension in the vertical direction on the connecting member. Moreover, as much as the connecting member is provided, the impact load can be distributed and received by the body skeleton. Therefore, the deformation of the entire body skeleton due to the collision load can be suitably suppressed.

In the frame structure, the vehicle has a suspension tower for front wheels extending upward from the lower frame, and the upper portion is rearward between the front end of the roof side rail and the suspension tower. The A-pillar extends diagonally downward from the rear to the front, and the lower portion is a connection reinforcement extending diagonally upward from the rear to the front between the lower frame and the suspension tower. The tip is fixed to the suspension tower.

In the above configuration, when the vehicle collides forward, the impact load acts on the tip of the bent portion via the lower frame and the suspension tower. As a result, a force that deforms the body skeleton so as to open the bent portion (A pillar and connection reinforcement) acts on the body skeleton. According to the above configuration, since the connecting member for connecting the A-pillar and the connecting reinforcement is provided, it is possible to suppress the deformation of the A-pillar and the connecting reinforcement.

In the frame structure, it is preferable that the hinge member of the vehicle door is attached to the connecting member.
According to the above configuration, a connecting member for suppressing deformation of the entire body skeleton can be used as a mounting portion for attaching the hinge member of the vehicle door. Therefore, with a simple structure, it is possible to suppress deformation of the entire body skeleton and attach a vehicle door.

In the frame structure, when the vehicle door is closed, it is preferable that the connecting member and the rear pillar portion are connected via the frame of the vehicle door.
According to the above configuration, when the vehicle door arranged on the side portion of the vehicle is closed, the connecting member and the rear pillar portion are separated (or close to each other) by using the frame of the vehicle door. It is possible to prevent the body skeleton from being deformed.

In the frame structure, the tubular pipe material is a steel pipe.
According to the above configuration, in a vehicle having a body skeleton formed by processing a steel pipe, the entire body skeleton can be deformed by a collision load with a simple configuration such as adding a connecting member for connecting two parts of the body skeleton. It becomes possible to suppress it suitably.

According to the frame structure of the vehicle of the present invention, deformation of the entire body due to a collision load can be suitably suppressed.

An exploded perspective view of the frame structure of the vehicle of one embodiment. Top view of the lower frame of the vehicle. Side view of the lower frame and body skeleton. The side view which shows the arrangement structure of the door in a closed state. The operation diagram for demonstrating the operation by the connecting member.

Hereinafter, an embodiment of the frame structure of the vehicle will be described.
As shown in FIG. 1, the vehicle of the present embodiment is formed by a lower frame 10 formed of a ladder-shaped frame (so-called ladder frame) provided at the lower part and a round steel pipe and fixed to the upper part of the lower frame 10. It has a body skeleton 20 and a ladder.

Hereinafter, the structure of the lower frame 10 will be described in detail.
As shown in FIGS. 1 and 2, the lower frame 10 is arranged at intervals in the vehicle width direction and extends in a square tubular shape in the front-rear direction of the vehicle (right side member 11, left side member 12). And, it has a plurality of cross members 13 and 14 (7 in this embodiment) that are arranged at intervals in the front-rear direction and extend in the vehicle width direction.

The rear wheel TR (FIG. 2) of the vehicle is arranged on the side of the rear portion 10R of the lower frame 10. In the rear portion 10R of the lower frame 10, the rear portion of the side members 11 and 12 extends in the horizontal direction (direction parallel to the road surface), and the front portion of the side members 11 and 12 is obliquely downward from the rear to the front. And extends diagonally outward. Further, in the rear portion 10R of the lower frame 10, a plurality of cross members 13 (three in the present embodiment) are provided so as to connect the pair of side members 11 and 12 to the rear portions of the side members 11 and 12. It is fixed.

The central portion 10C of the lower frame 10 is arranged below the cabin (not shown) of the vehicle. In the central portion 10C of the lower frame 10, each side member 11 and 12 extends in the horizontal direction, and the distance between the side members 11 and 12 in the vehicle width direction is larger than that of the other portions (rear portion 10R and front portion 10F). It's getting wider. Further, in the central portion 10C of the lower frame 10, a pair of outriggers 15 are arranged at positions sandwiching the side members 11 and 12 outside the side members 11 and 12 in the vehicle width direction. Each outrigger 15 extends in the front-rear direction at a position spaced apart from the side members 11 and 12.

Further, a circular tube-shaped cross member 14 extending linearly in the vehicle width direction is provided in the central portion 10C of the lower frame 10 in the vicinity of the rear end and the vicinity of the front end, respectively. These cross members 14 are fixed to the side members 11 and 12 and the outriggers 15 in a manner of penetrating the pair of side members 11 and 12 and the pair of outriggers 15. In this way, the cross member 14 is erected so as to integrally connect the pair of side members 11 and 12 and the pair of outriggers 15. Further, in the central portion 10C of the lower frame 10, a connecting portion 16 extending in the vehicle width direction between the side members 11 and 12 and the outriggers 15 and connecting the side members 11 and 12 and the outriggers 15 is integrally fixed. ing.

In the front portion 10F of the lower frame 10, the front side portions of the side members 11 and 12 extend in parallel in the horizontal direction, and the rear side portions of the side members 11 and 12 are obliquely downward and diagonally outward from the front to the rear. Extends to. A plurality of (two in this embodiment) cross members 13 are fixed to the front portion 10F of the lower frame 10 so as to connect the side members 11 and 12 to each other.

Suspension towers for front wheels (right side suspension tower 17R, left side suspension tower 17L) are integrally provided on both sides of the front portion 10F of the lower frame 10, and front wheel TFs (see FIG. 2) are arranged. The suspension towers 17R and 17L each extend upward from the lower frame 10 (each side member 11 and 12), and the suspension for the front wheels (not shown) is supported on the upper portion thereof.

At the upper part of each suspension tower 17R, 17L, a U-shaped wall portion having a U-shaped cross section including a front wall 17RF, 17LF, a rear wall 17RR, 17LR, and an outer wall 17RO, 17LO on the outer side in the vehicle width direction is provided. A plate-shaped dash panel 18 extending in the vertical direction and the vehicle width direction is fixed to the rear walls 17RR and 17LR of the suspension towers 17R and 17L. The dash panel 18 constitutes the front wall of the cabin. Further, the front walls 17RF and 17LF of the suspension towers 17R and 17L are provided with a cross member 19 extending in the vehicle width direction so as to connect the suspension towers 17R and 17L.

Hereinafter, the structure of the body skeleton 20 will be described in detail.
As shown in FIGS. 1 and 3, a right side frame 21R is provided on the right side of the vehicle (specifically, the cabin), and a left side frame 21L is provided on the left side of the vehicle. Since the side frames 21R and 21L have the same basic structure, the members having the same function in the members constituting the side frames 21R and 21L are indicated by the same reference numerals, and the same members are duplicated. The explanation is omitted.

Each of the side frames 21R and 21L has a front pillar portion 22 extending in the vertical direction at the front of the cabin, a roof side rail 23 extending in the front-rear direction at the upper part of the cabin, and a rear pillar portion 24 extending in the vertical direction at the rear of the cabin. doing.

The front pillar portion 22 has a shape that is bent so as to form a convex shape that protrudes forward. In the present embodiment, the front pillar portion 22 corresponds to the bent portion. Specifically, the portion of the front pillar portion 22 above the front tip (front end 22F) constitutes the A pillar 25. The A-pillar 25 extends diagonally downward from the rear to the front between the front end of the roof side rail 23 and the suspension towers 17R and 17L. Further, a portion of the front pillar portion 22 below the front end 22F constitutes a connection reinforcement 26 for connecting the lower frame 10 (outrigger 15) and the suspension towers 17R and 17L. The connection reinforcement 26 extends diagonally upward from the rear to the front between the outrigger 15 and the suspension towers 17R and 17L.

The front end 22F of the front pillar portion 22 of the right side frame 21R is fixed to the outer wall 17RO at the upper part of the right suspension tower 17R via a connecting member (not shown), and the front end 22F of the front pillar portion 22 of the left side frame 21L is fixed. , Is fixed to the outer wall 17LO at the upper part of the left suspension tower 17L via a connecting member (not shown). Further, a plate-shaped front panel 27 extending in the vehicle width direction and the vertical direction is fixed to the front end 22F of the front pillar portions 22 of the side frames 21R and 21L so as to connect the front end 22Fs to each other.

A connecting member 28 for integrally connecting the A pillar 25 and the connecting reinforcement 26 is fixed to the front pillar portions 22 of the side frames 21R and 21L at positions rearward from the front end 22F. Specifically, the connecting member 28 has a plate shape extending in the vertical direction and the front-rear direction, and the upper portion of the connecting member 28 is fixed (welded) to the A pillar 25 and the lower portion is fixed (welded) to the connecting reinforcement 26. Has been done.

The roof side rails 23 extend rearward from the rear end of the A pillar 25 on both sides of the upper part of the cabin.
The rear pillar portion 24 has a bent shape in the middle. Specifically, the upper portion of the rear pillar portion 24 constitutes the B pillar 29 arranged at the rear portion of the cabin. The B-pillar 29 extends vertically from the rear end of the roof side rail 23 downward. Further, the lower portion of the rear pillar portion 24 constitutes a connection reinforcement 30 that connects the outrigger 15 of the lower frame 10 and the B pillar 29. The connection reinforcement 30 extends obliquely downward from the lower end of the B pillar 29 toward the front.

In each of the side frames 21R and 21L, the front pillar portion 22, the roof side rail 23, and the rear pillar portion 24 are integrally formed by bending a round steel pipe. The lower end of the front pillar portion 22 (connection reinforcement 26) is fixed to the front portion of the outrigger 15 via a triangular connecting member 31 in a lateral view. The upper surface of the connecting member 31 extends along the lower portion of the connecting reinforcement 26, the lower surface of the connecting member 31 extends along the upper surface of the outrigger 15, and the front surface of the connecting member 31 extends in the vertical direction. Further, the lower end of the rear pillar portion 24 (connection reinforcement 30) is fixed to the rear portion of the outrigger 15 via the triangular connecting member 32 in a lateral view. The upper surface of the connecting member 32 extends along the lower portion of the connecting reinforcement 30, the lower surface of the connecting member 32 extends along the upper surface of the outrigger 15, and the rear surface of the connecting member 32 extends in the vertical direction. As a result, in the present embodiment, when the vehicle is viewed from the side, the body skeleton is formed so that the front pillar portion 22, the roof side rail 23, the rear pillar portion 24, and the outrigger 15 form an annular shape on both sides of the vehicle. 20 is fixed to the lower frame 10. In the present embodiment, when the vehicle is viewed from the side, each part of each side frame 21R, 21L (specifically, the center line of the round steel pipe) forms a convex shape protruding toward the outside of the cabin. The side frames 21R and 21L are extended so as to be in either a bent state or a straight extending state.

A door striker 33 is fixed to the lower portion of the B pillar 29 of each of the side frames 21R and 21L. Further, in the rear portion 10R (rear portion of the side members 11 and 12) of the lower frame 10, the lower portion extends upward and the upper portion extends outward in the vehicle width direction in the portion below the B pillar 29. The connecting arm 34 of the above is provided. The lower part of the B pillar 29 is fixed to the upper part of the connecting arm 34. The lower portion of the B pillar 29 and the rear portion 10R of the lower frame 10 are connected via the connecting arm 34. A cross member 35 (FIG. 1) for integrally connecting the connecting arms 34 is installed between the connecting arms 34 provided on the side members 11 and 12.

A rear frame 36 is provided at the rear of the vehicle. The rear frame 36 includes a right beam 37 extending in the vertical direction on the right side of the vehicle, a left beam 38 extending in the vertical direction on the left side of the vehicle, and an upper beam extending in the vehicle width direction so as to connect the upper ends of the beams 37 and 38. It has 39 and.

At the rear end of the lower frame 10 (specifically, the rear ends of the side members 11 and 12), the connecting arm 40 has a shape in which the lower portion extends upward and the upper portion extends outward in the vehicle width direction. Is provided. Then, the lower part of the right beam 37 is fixed to one of the connecting arms 40, and the lower part of the left beam 38 is fixed to the other. The right beam 37 is connected to the rear end of the right side member 11 and the left beam 38 is connected to the rear end of the left side member 12 via such a connecting arm 40. Further, the rear frame 36 extends in the front-rear direction to connect the right beam 37 and the B pillar 29 of the right side frame 21R (FIG. 1), and extends in the front-rear direction to connect the left beam 38 and the left side frame 21L. It has a connection member 43 that connects to the B pillar 29.

Hereinafter, the doors 50 attached to both sides of the cabin in the vehicle will be described.
Since these doors 50 have the same basic structure, the members having the same function in the members constituting the doors 50 are designated by the same reference numerals, and duplicate description of the same members will be omitted.

As shown in FIGS. 1 and 4, the door frame 51 forming the skeleton of the door 50 has a front frame portion 52 arranged at the front portion and extending in the vertical direction and a rear frame portion 53 arranged at the rear portion and extending in the vertical direction. And two door beams 54 and 55 extending in the front-rear direction in a manner in which the front frame portion 52 and the rear frame portion 53 are integrally connected. In the present embodiment, the front frame portion 52 is formed of a metal plate, and the rear frame portion 53 and the door beams 54 and 55 are formed of a round steel pipe.

The front frame portion 52 constitutes a movable portion of the hinge member used for opening and closing the door 50 on the door 50 side, and is arranged so as to extend along the connecting member 28 of the body skeleton 20. In the present embodiment, the vehicle body side fixing portion (vehicle body side hinge portion 44) of the hinge member is fixed to the connecting member 28 of the body skeleton 20. The front frame portion 52 of the door frame 51 is swingably connected to the hinge portion 44 on the vehicle body side. The door 50 can be opened and closed by swinging in the vehicle width direction via a hinge member including a front frame portion 52 and a vehicle body side hinge portion 44.

The rear frame portion 53 is arranged so as to extend along the lower portion of the B pillar 29 and the connection reinforcement 30. The door beams 54 and 55 extend in the front-rear direction at positions spaced apart from each other in the vertical direction, and the front portion is fixed to the front frame portion 52 and the rear portion is fixed to the rear frame portion 53.

The door frame 51 is a flat plate-shaped reinforcing arm 56 that integrally connects the upper one (door beam 54) of the two door beams 54 and 55 and the portion of the rear frame portion 53 sandwiched between the door beams 54 and 55. have. A door latch 57 is fixed to the connecting portion between the reinforcing arm 56 and the rear frame portion 53.

In the present embodiment, when the door 50 is closed (the state shown in FIG. 4), the door latch 57 fixed to the door 50 and the door striker 33 fixed to the body skeleton 20 are engaged with each other to engage the door 50. Will be locked in the closed state. When the door 50 is closed in this way, the connecting member 28 and the rear pillar portion 24 in the body skeleton 20 are connected via the vehicle body side hinge portion 44, the door frame 51, the door latch 57, and the door striker 33. Will be done.

Further, in the present embodiment, when the door 50 is closed, the rear end portion of the door beam 54 and the lower portion of the rear frame portion 53 of the door frame 51 are on the outer side of the rear pillar portion 24 of the body skeleton 20 in the vehicle width direction. The shape of each part of the door frame 51 is determined so as to be in the arranged state. As a result, when the door 50 is closed, the rear portion of the door frame 51 and the rear pillar portion 24 of the body skeleton 20 are in close proximity to each other and overlap in the vehicle width direction.

Hereinafter, the effects of adopting the frame structure of the present embodiment will be described.
As shown in FIG. 5, in the vehicle of the present embodiment, the front pillar portion 22 of the body skeleton 20 is bent so as to form a convex shape protruding forward. Therefore, when an impact load is applied from the front to the front end 22F of the front pillar portion 22 at the time of a frontal collision of the vehicle, the front pillar portion 22 (specifically, the A pillar 25 and the connection reinforcement 26) is opened in the vertical direction. The force F1 that deforms the body comes to act. The alternate long and short dash line in FIG. 5 shows an example of the shape of the body skeleton 20 when the front pillar portion 22 is deformed so as to open in the vertical direction.

In the present embodiment, the front pillar portion 22 is provided with a connecting member 28 for connecting a portion above the front end 22F (A pillar 25) and a portion below the front end 22F (connection reinforcement 26). Therefore, when a force F1 that deforms the front pillar portion 22 so as to open in the vertical direction acts, the tension in the vertical direction (arrow F2 in FIG. 4) acts on the connecting member 28, so that the front pillar portion 22 It will be possible to suppress the deformation so that it opens. Moreover, since the connecting member 28 is provided on the body skeleton 20, the impact load can be distributed and received by the body skeleton 20. Further, since the side frames 21R and 21L are extended so that the side frames 21R and 21L and the outrigger 15 form an annular shape, when the force F1 is applied, the rear pillar portion 24 and the connecting arm 34 are also extended. Vertical tension (arrows F3 and F4 in the figure) comes to act. The tensions F3 and F4 also suppress the deformation of the front pillar portion 22 so as to open, and eventually the deformation of the entire side frames 21R and 21L can be suppressed. As described above, according to the present embodiment, it is possible to prevent the entire shape of the body skeleton 20 from being deformed by the collision load caused by the front collision of the vehicle.

Further, in the present embodiment, the front end 22F of the front pillar portion 22 is fixed to the suspension towers 17R and 17L. As a result, the load applied to the suspension for the front wheels when the vehicle is running is easily transmitted to the body skeleton 20 in addition to being directly transmitted to the lower frame 10 (including the suspension towers 17R and 17L), so that the load is distributed over a wide range. You will be able to receive it. However, in such a vehicle, an impact load applied from the front at the time of a frontal collision acts on the front end 22F of the front pillar portion 22 via the lower frame 10 and the suspension towers 17R and 17L. From this, it can be said that the vehicle of the present embodiment has a structure in which a force F1 that deforms the front pillar portion 22 so as to open in the vertical direction is easily applied at the time of a forward collision. In the present embodiment, since the connecting member 28 for connecting the A pillar 25 and the connecting reinforcement 26 is provided on such a vehicle, the deformation of the front pillar portion 22 at the time of a forward collision can be suitably suppressed.

Further, in the present embodiment, the connecting members 28 are provided on the side frames 21R and 21L, and the rigidity of the body skeleton 20 is increased by that amount. Therefore, the deformation of the body skeleton 20 when the vehicle is running can be suppressed, and the generation of vehicle body vibration and the generation of noise due to the vehicle body vibration can be suppressed.

In the vehicle of the present embodiment, the body skeleton 20 has an inexpensive structure formed by processing a round steel pipe. In such a vehicle, the overall deformation of the body skeleton 20 due to the collision load due to the front collision can be suitably suppressed by adding a connecting member 28 that connects the two parts of the body skeleton 20.

As shown in FIG. 4, in the present embodiment, the connecting member 28 for suppressing the deformation of the body skeleton 20 can be used as a mounting portion for attaching the hinge member of the door 50 (specifically, the hinge portion 44 on the vehicle body side). can. Therefore, with a simple structure, it is possible to suppress deformation of the entire body skeleton 20 and attach the door 50.

Further, in the vehicle of the present embodiment, when the door 50 is closed, the connecting member 28 and the rear pillar portion 24 in the body skeleton 20 are passed through the vehicle body side hinge portion 44, the door frame 51, the door latch 57, and the door striker 33. It has a structure in which and is connected. Therefore, the door frame 51 is erected between the connecting member 28 and the rear pillar portion 24 and functions as a tension bar on which compressive stress and tensile stress act. Then, due to the function of the door frame 51, when an impact load due to a vehicle collision is applied to the side frames 21R and 21L, the connecting member 28 and the rear pillar portion 24 are brought close to each other or separated from each other. Deformation of the side frames 21R and 21L can be suppressed. As described above, according to the present embodiment, the side frames 21R and 21L of the body skeleton 20 are deformed in such a manner that the connecting member 28 and the rear pillar portion 24 are separated (or close to each other) in the event of a vehicle collision. It can be suppressed by using the door frame 51 of 50. Therefore, the deformation of the entire body skeleton 20 can be suppressed more preferably.

Moreover, in the vehicle of the present embodiment, when the door 50 is closed, the rear portion of the door frame 51 (specifically, the rear end portion of the door beam 54 and the lower portion of the rear frame portion 53) is from the rear pillar portion 24 of the body skeleton 20. Is also arranged on the outside of the vehicle, and the rear portion of the door frame 51 and the rear pillar portion 24 of the body skeleton 20 overlap each other in the vehicle width direction. Therefore, even when an impact load is applied to the outer surface of the door 50 in the case of a lateral collision of the vehicle and the door 50 moves to the inside of the vehicle, the rear portion of the door frame 51 abuts on the rear pillar portion 24 of the body skeleton 20. Therefore, it is possible to prevent the door 50 from moving to the inside of the cabin together with the obstacle that collided with the door 50.

As described above, according to the present embodiment, the effects described below can be obtained.
(1) Since the connecting member 28 for connecting the A pillar 25 and the connecting reinforcement 26 is provided on the front pillar portion 22, the entire body skeleton 20 is deformed by the collision load due to the front collision of the vehicle. It can be suppressed suitably.

(2) Since the front end 22F of the front pillar portion 22 is fixed to the suspension towers 17R and 17L, the front pillar portion 22 has a structure in which a force F1 that deforms the front pillar portion 22 so as to open is easily applied. It is possible to preferably suppress the deformation so as to open.

(3) A connecting member 28 for suppressing deformation of the entire body skeleton 20 is used as a mounting portion for attaching the vehicle body side hinge portion 44. Therefore, with a simple structure, it is possible to suppress deformation of the entire body skeleton 20 and attach the door 50.

(4) When the door 50 is closed, the connecting member 28 and the rear pillar portion 24 in the body skeleton 20 are connected via the vehicle body side hinge portion 44, the door frame 51, the door latch 57, and the door striker 33. .. Therefore, the side frames 21R and 21L of the body skeleton 20 are deformed in such a manner that the connecting member 28 and the rear pillar portion 24 are separated (or close to each other) in the case of a frontal collision of the vehicle. It can be used and suppressed.

(5) In a vehicle in which a body skeleton 20 having an inexpensive structure formed by processing a round steel pipe is adopted, a connecting member 28 for connecting two parts of the body skeleton 20 is added to the front. Deformation of the overall shape of the body skeleton 20 due to the collision load due to the collision can be suitably suppressed.

<Modification example>
The above embodiment may be modified as follows.
If the shape of the connecting member 28 is such that the A pillar 25 and the connecting reinforcement 26 are integrally connected and extend in the vertical direction, the horizontal cross section may be U-shaped or L-shaped. It can be changed arbitrarily, such as a square cylinder or a cylinder extending.

-As a method of fixing the connecting member 28 to the A pillar 25 and the connecting reinforcement 26, in addition to fixing by welding, caulking fixing using rivets, fastening fixing using screw members, and the like can be adopted.

-The frame structure of the above embodiment can be applied to a vehicle in which the front end 22F of the front pillar portion 22 is not fixed to the suspension towers 17R and 17L.
-The side frames 21R and 21L may be integrally formed by welding and connecting the ends of a plurality of round steel pipes that have been appropriately bent.

-The frame structure of the above embodiment can also be applied to a vehicle in which the body skeleton 20 is formed of a tubular pipe material (such as a square steel pipe) other than a round steel pipe.
-The frame structure of the above embodiment can be applied to a portion on the rear side of the side frame after appropriately changing the configuration. In this case, the configuration may be as follows. That is, the rear pillar portion of the side frame has a bent portion bent so as to form a convex shape protruding toward the rear side of the vehicle. The bent portion of the rear pillar portion is provided with a connecting member that integrally connects the portion above the rear tip (for example, the B pillar) and the portion below the rear pillar portion (for example, connection reinforcement). ..

-The frame structure of the above embodiment can also be applied to a vehicle in which the entire basic portion of the lower frame is formed of a tubular pipe material (round steel pipe, square steel pipe, etc.).
-The frame structure of the above embodiment can be applied to a vehicle in which doors are provided on only one of both sides and a vehicle in which doors are not provided on either side.

10 ... Lower frame, Front ... 10F, Central ... 10C, Rear ... 10R, 11 ... Right side member, 12 ... Left side member, 13 ... Cross member, 14 ... Cross member, 15 ... Outrigger, 16 ... Connecting part, 17R ... right suspension tower, 17L ... left suspension tower, 17RF, 17LF ... front wall, 17RR, 17LR ... rear wall, 17RO, 17LO ... outer wall, 18 ... dash panel, 19 ... cross member, 20 ... body skeleton, 21R ... right side Side frame, 21L ... Left side frame, 22 ... Front pillar part, 22F ... Front end, 23 ... Roof side rail, 24 ... Rear pillar part, 25 ... A pillar, 26 ... Connection reinforcement, 27 ... Front panel, 28 ... Connection Member, 29 ... B pillar, 30 ... Connection reinforcement, 31 ... Connection member, 32 ... Connection member, 33 ... Door striker, 34 ... Connection arm, 35 ... Cross member, 36 ... Rear frame, 37 ... Right beam, 38 ... Left beam, 39 ... Upper beam, 40 ... Connecting arm, 41 ... Connecting member, 43 ... Connecting member, 44 ... Body side hinge, 50 ... Door, 51 ... Door frame, 52 ... Front frame, 53 ... Rear frame , 54, 55 ... Door beam, 56 ... Reinforcing arm, 57 ... Door latch.

Claims (4)

A pair of front pillars that are made of tubular pipe material and extend vertically at the front of the vehicle, a pair of roof side rails that extend in the front-rear direction at the top of the vehicle, and a pair of rear pillars that extend vertically at the rear of the vehicle. It has a lower frame extending in the front-rear direction at the lower part of the vehicle and a pair of suspension towers for front wheels extending upward from the lower frame, and has a pair of front pillar portions, a pair of roof side rails, and a pair of rear pillars. The portions and the pair of suspension towers are respectively arranged at intervals in the vehicle width direction, and the body skeleton is formed by the pair of front pillar portions, the pair of roof side rails, and the pair of rear pillar portions. The body skeleton is formed so that the front pillar portion, the roof side rail, the rear pillar portion, and a part of the lower frame form an annular shape on one side and the other side in the vehicle width direction. In the frame structure of the vehicle fixed to
The front pillar portion has a bent portion that is bent so as to form a convex shape that protrudes toward the front of the vehicle.
The bent portion is provided with a connecting member that integrally connects the portion above and below the tip on the front side.
The upper portion is an A-pillar extending diagonally downward from the rear to the front between the front end of the roof side rail and the suspension tower.
The lower portion is a connection reinforcement extending diagonally upward from the rear to the front between the lower frame and the suspension tower.
The tip of the bent portion is fixed to the outer wall of the suspension tower on the outer side in the vehicle width direction via a front pillar fixing member.
A vehicle frame structure characterized in that the pair of bent portions are connected to each other by a plate-shaped front panel extending in the vehicle width direction and the vertical direction. The vehicle frame structure according to claim 1 , wherein a hinge member for a vehicle door is attached to the connecting member. The vehicle frame structure according to claim 2 , wherein when the vehicle door is closed, the connecting member and the rear pillar portion are connected via a frame of the vehicle door. The vehicle frame structure according to any one of claims 1 to 3 , wherein the tubular pipe material is a steel pipe.

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