KR20030015039A - a front frame mounting structure of vehicles - Google Patents

Abstract

PURPOSE: Mounting structure of a front frame for a vehicle is provided to prevent deformation of a vehicle room, and to protect passengers by reducing impact and shutting off the transmission passage with bending or breaking an extended body and displacing a cup from a hole of the front frame at a collision. CONSTITUTION: A cup(3) is inserted to a hole formed in a front frame(10), and a bush(4) is inserted to the cup. A pipe(5) is fitted to the bush. The lower part of a body(7c) of a pipe nut(7) is inserted to the pipe, and combined with a bolt(9) fitting from the lower part of the cup. The body of the pipe nut is extended, and a flange(7d) is spaced from a vehicle body panel(12). The flange is supported by an extended end(4a) of the bush. The body is bent or broken, and the cup is separated from the front frame hole in applying impact to the front frame at a collision. Deformation is prevented, and passengers are protected by reducing impact with shutting off the passage.

Description

Front frame mounting structure of vehicles

The present invention relates to a front frame mounting structure of a vehicle, which is capable of dissipating the impact force transmitted to the body panel when a collision occurs, so that the body panel is not deformed, thereby preventing injuries of passengers. It is about.

In general, a frame that serves as a skeleton of the entire vehicle is installed in the lower part of the vehicle, and various body panels forming the engine and the cabin are mounted on the frame.

Meanwhile, as shown in FIG. 1, vehicle types to which the “??” shaped front frame 10 is applied, which are excellent in rigidity and more advantageous to shock absorption, are increasing, and four corner portions of the front frame 10 are formed in the vehicle body. It is mounted on the side member 20 and the body panel 12 which comprises a vehicle compartment, respectively. (Refer FIG. 2, FIG. 3).

The mounting structure has holes formed in the upper plate 10a and the lower plate 10b of the front frame 10, as shown in FIG. 2, where the holes formed in the upper plate 10a are the lower plate 10b. It is smaller than a hole formed in the bottom plate 10b. The U-shaped cup 13 is inserted upside down, and a rubber bush 14 is fitted inside the cup 13, and this bush ( 14, a pipe 15 is inserted into the center of the pipe 15, and an upper end of the pipe 15 protrudes upward of the upper plate 10a so that the upper stopper 16 is fitted into the protruding portion. A body panel 12 is positioned above the body 16, a pipe nut 17 is inserted into the pipe 15 through the body panel 12, and a lower stopper (B) is provided below the bush 14. A bolt 19 penetrating through 18 is inserted into the pipe 15 and screwed to the lower end of the pipe nut 17.

Here, the upper end of the cup 13 supports the periphery of the hole of the upper plate (10a), the flange portion of the lower end over the periphery of the hole of the lower plate (10b), the flange portion and the lower end of the cup (13) An extension end 14a of the bush 14 is positioned between the lower stoppers 18.

Therefore, the front frame 10, the body panel 12 and the body side member 20 is fixed by the structure as described above, so that the vibration and shock transmission is reduced by the extension end portion 14a of the bush (14). Structure.

On the other hand, if a strong collision accident occurs in the vehicle, the front frame 10 is deformed as shown in FIG. 4 from the state shown in FIG.

That is, the middle portion of the front frame 10 is bent downward, the impact force of the rest after deforming the front frame 10 is the cup 13, bush 14, pipe 15, pipe nut It is transmitted to the vehicle body panel 12 via a mounting part such as 17 to deform the vehicle body panel 12.

As shown, the deformation of the vehicle body panel 12 from the position before the collision (dotted line) to the position after the collision (solid line) means a compression deformation of the vehicle, which is a great injury to the front occupant such as the driver or passenger seat occupant. Became a factor.

As described above, the conventional front frame mounting structure is so rigid that the body panel is deformed and transmitted to the body panel without threatening to block or reduce the impact force transmitted from the front of the vehicle due to the collision, thereby threatening the safety of the occupant. There was a problem.

Accordingly, the present invention has been invented to solve the above problems, when excessive shock due to the collision absorbs the shock from the mounting portion to reduce the amount of shock transmitted to the vehicle body panel, or to block the shock transmitted to the vehicle body It is an object of the present invention to provide a front frame mounting structure of a vehicle in which a body panel is not deformed to protect a passenger by preventing shock from being transmitted to the panel.

1 is a front frame plan view of a car,

FIG. 2 is a cross-sectional view taken along the line I-I of FIG. 1, illustrating a front frame mounting structure; FIG.

3 is a state diagram before the collision of the front frame,

4 is a state diagram after the collision of the front frame,

5 is a cross-sectional view of the front frame mounting structure according to the present invention;

6 is a diagram illustrating a state of bending a pipe nut due to a collision of a front frame mounting structure according to the present invention;

7 is a diagram illustrating a broken state of the pipe nut due to the collision of the front frame mounting structure according to the present invention.

* Description of the symbols for the main parts of the drawings *

3: cup, 4: bush,

4a: extension end, 5: pipe,

7: pipe nut, 7a: head,

7b: flange, 7c: body,

7d: flange, 9: bolts,

10: front frame, 10a: top plate,

10b: lower plate, 12: body panel.

The present invention for achieving the above object, the cup is inserted into the hole formed in the front frame from the top, the bush is inserted into the cup, the pipe is inserted into the bush, the body of the pipe nut through the body panel A lower part is inserted into the pipe and screwed into a bolt inserted from the lower part of the cup. The body of the pipe nut is extended in length while a flange is formed at a predetermined distance from the body panel. The flange extends the bush. It is made of a structure supported by the end.

Therefore, when an excessive shock is transmitted during the collision, the body portion of the pipe nut is bent or broken to absorb the impact amount or block the transmission to the vehicle body panel, thereby preventing deformation of the vehicle body panel.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

5 is a cross-sectional view of the front frame mounting structure according to the present invention, in which the U-shaped cup 3 is inserted into the hole formed in the front frame 10 from the top, and the pipe (3) in the center of the cup (3). A rubber bush 4 inserted therein is inserted and seated, and a lower end of the pipe nut 7 penetrating the body panel 12 penetrates the cup 3 downward from the inside of the pipe 5. It consists of a structure that is fastened with the inserted bolt (9).

Here, the hole formed in the front frame 10 is larger than the hole formed in the lower plate 10b, so that the bottom portion of the cup 3 inserted from the upper portion is around the hole of the lower plate 10b. Supported by the part, the upper flange of the cup 3 is over the periphery of the hole of the top plate 10a.

In addition, an upper portion of the bush 4 protrudes outward from the cup 3, which is formed on the body 7c of the pipe nut 7 by tightening the bolt 9. It is in close contact with the flange 7d.

Meanwhile, the pipe nut 7 includes a head 7a positioned on the upper surface of the body panel 12 and a body 7c extending downward from the head 7a and positioned below the body panel 12. The lower portion of the head 7a and the middle portion of the body 7c are flanges 7b and 7d, respectively.

Of these, the above-described flange 7d is formed at a position spaced apart from the lower surface of the vehicle body panel 12 by a predetermined distance C. The length of the body 7c is extended by this distance C as compared with the prior art.

Therefore, the mounting unit having the structure as described above absorbs or blocks the shock while showing a reaction as shown in FIG. 6 or 7 when the impact caused by the collision is transmitted.

6 is a case in which the body 7c of the long pipe nut 7 is bent backwards by an impact transmitted, and thus the impact force is absorbed as the body 7c of the pipe nut 7 is bent. Impact to be transmitted to the body panel 12 is reduced.

Thereafter, the cup 3 exits from the front frame 10 so that the impact transmitted from the front frame 10 can no longer be transmitted to the body panel 12 through the mounting unit.

On the other hand, when a very heavy impact force is instantaneously, as shown in Fig. 7, the body 7c of the pipe nut 7 is broken, even when the body 7c is broken in this way, the impact through the mounting portion Since the transmission path is blocked, the body panel 12 is not deformed.

Therefore, since the body panel 12 is not deformed, the front part of the vehicle compartment does not enter the front seat side, thereby improving the safety of the occupants.

As described above, according to the present invention, since the body of the pipe nut, which is a medium connecting the front frame and the vehicle body panel, is bent or broken, and the cup is separated from the front frame, absorbing the impact force reduces the amount of transmission or transmits the impact force Is blocked so that the impact force is not transmitted to the vehicle body panel so that the vehicle body panel is not deformed during collision.

Therefore, since the cabin is not deformed toward the front seat, the possibility of injury to the driver or passenger occupant due to the body deformation is reduced.

Claims (3)

The cup 3 is inserted and supported from the top by the hole formed in the front frame 10, and the bush 4 is inserted and seated in the cup 3, and the pipe 5 is provided at the center of the bush 4. The body 7c of the pipe nut 7 which penetrates the body panel 12 from the top thereof is extended to be inserted into the pipe 5, and the cup 3 penetrates from the bottom to the insertion portion. Front frame mounting structure of a vehicle, which consists of a structure in which one bolt (9) is screwed. The hole formed in the upper plate (10a) of the front frame 10 is larger than the hole formed in the lower plate (10b), the periphery of the hole of the lower plate (10b) is a lower portion of the cup (3). The front frame mounting structure of the vehicle, characterized in that the support is made of a structure for supporting the upper edge portion of the cup (3) around the hole of the upper plate (10a). 2. The flange (7b) according to claim 1, wherein a flange (7b) is formed on the head (7a) of the pipe nut (7) in close contact with the upper surface of the body panel (12), and the body (7c) is spaced apart from the body panel (12). (C) A flange (7d) is formed at a position away from the front frame mounting structure of the vehicle, characterized in that the flange (7d) is supported by an extension end (4a) formed on the upper portion of the bush (4).