KR100401668B1 - Reinforcement Structure of Bus Body - Google Patents

Abstract

The present invention relates to a bus body reinforcement structure in which the body structure is reinforced to safely protect passengers in the event of the vehicle overturning within a range of minimizing the change of the bus body, and the waste rail portion 41 of the body Reinforcement of the steel 44 having a '-' cross section in the vertical direction, and the rear end pillar portion 42 of the vehicle body mounts the steel 45 having a 'b'-shaped cross section on the outside in a vertical direction. Reinforcement, the roof beam 43 is characterized in that the steel pipe 46 of the '차' cross-section mounted in the horizontal direction to reinforce the middle portion of the roof body.

Description

Reinforcement Structure of Bus Body

The present invention reinforces the bus body structure within the minimum range to maintain the body rigidity and energy absorption in each part optimally so as to ensure passenger safety from deformation of the body structure when the vehicle is overturned. It's about structure.

The Act on the Overturning of Vans with a Gross Vehicle Weight of 4.5 Tons or More, which is applied to vehicles produced from January 2003, is an item that defines the strength of the body to ensure the safety of passengers in the event of a vehicle overturn. By maintaining the vehicle's body rigidity and optimizing energy absorption in each part, it should be possible to secure the passenger's survival space from the deformation of the body structure when the vehicle is overturned.

FIG. 1 is a side view showing the entire body of an existing bus. In the case of a vehicle with a rear engine rear drive (RR) when the vehicle is overturned, an engine is mounted at the rear of the vehicle so that the weight distribution at the rear of the vehicle is improved. It's about 2.5 times larger than a front engine rear drive (FR) vehicle. Therefore, when the vehicle weighing about 7 tons on the ground having a height of 0.8 m from the vehicle tire is freely dropped, the rear pillar filler part 12 invades the living space and the margin of the waste rail part 11 is increased. Deterioration of the rear part of the vehicle, such as decreases, becomes serious.

FIG. 2A is a cross-sectional view of a waste rail of an existing bus, FIG. 2B is a cross-sectional view of an end pillar portion of a rear body of an existing bus, and FIG. 2C is a cross-sectional view of a roof beam mounted to a roof of an existing bus.

As shown in FIG. 2A, the waste rail part 11 of the existing bus is formed to have a cross section protruding from one side in a rectangular cross section using steel having a thickness of 2.0 mm, and as shown in FIG. ) Part is formed to have a protruding section on one side in the reverse trapezoidal cross section using a steel having a thickness of 2.0 mm, and, as shown in FIG. 2C, the loop beam 13 uses a steel having a thickness of 1.2 mm. One side is formed to have a cross section in the rectangular cross section.

3A is a view showing a front portion of the vehicle body for the overturning experiment, FIG. 3B is a view showing the middle portion of the vehicle body for the overturning experiment, and FIG. 3C is a view showing a rear portion of the vehicle body for the overturning experiment.

In each drawing, the line A1 is a line representing the vehicle body before the experiment, the line B1 is a line representing the vehicle body after the experiment, and the line C1 is a line representing the pin tip after the experiment.

The distance between the body fin end C1 and the panel of the living space panel 31 before the overturning experiment is 100 mm. As shown in FIG. 3a, the margin of the vehicle body front part 32 after the overturning test is only 10 mm between the vehicle fin end C1 and the panel of the living space panel 31, and as shown in FIG. 33), the margin between the body fin end C1 and the panel of the living space panel 31 after the overturn test is only 53 mm. As shown in FIG. 3C, the rear part 34 of the vehicle body shows the body fin end C1 after the overturn test. It can be seen that there is a margin between the living space panel 31 and the panel and thus violates the living space panel 31 by the deformation of the vehicle structure after vehicle overturning, which causes a great risk to the safety of the passengers.

Determination of the "Law for Rollover of Vans with Gross Vehicle Weight of 4.5 Tons or More" is a violation of the passenger space panel 31 of the passenger due to the deformation of the vehicle structure during and after the experiment. In order to reinforce the structure, the filler cross-section structure of the end pillar part at the rear of the existing body takes excessive development cost and time, and the development of the side window and the outer panel, which is the change of the production line and related parts, is accompanied by a huge investment cost. do.

In addition, if the reinforcement range is excessive, the fuel consumption loss, material cost, and the number of work processes increase due to the increase in the weight of the vehicle, and a new investment cost is required for the production of the vehicle.

The present invention devised to solve such a problem is to reinforce the body structure of the bus within the minimum range to maintain the body rigidity of the vehicle and the energy absorption in each part to optimize the passenger body from deformation of the body structure when the vehicle is overturned. The purpose is to secure a living space.

The object of the present invention described above is to reinforce and install the steel having a 'b' shaped cross section on the outside of the waste rail of the bus, and to reinforce the steel having a 'b' shaped cross section on the end pillar portion at the rear of the vehicle body. The beam is achieved by providing a bus body reinforcement structure that is reinforced with steel pipes of cross section.

1 is a side view showing a vehicle body of an existing bus;

Figure 2a is a view showing a cross section of the waste rail in the body structure of the existing bus.

Fig. 2B shows a cross section of the vehicle body rear end pillar.

2c shows a cross section of a loop beam;

3A is a diagram showing the results of the front portion of the body reinforcement for the body overturn test.

3b shows the result of the middle part.

Figure 3c shows the result of the latter part.

Figure 4 is a side view showing a body reinforcement portion of the bus according to an embodiment of the present invention.

Figure 5a is a cross-sectional view of the reinforcing structure of the waste rail unit according to an embodiment of the present invention.

5B is a cross-sectional view of the reinforcing structure of the vehicle body rear end pillar portion.

5C is a cross-sectional view of the reinforcing structure of the roof beam.

Figure 6a is a view showing the results of the front portion after the body reinforcement for the overturning test according to an embodiment of the present invention.

6b shows the result of the middle part.

Figure 6c shows the result of the latter part.

Figure 7a is a cross-sectional view showing a reinforcing structure of the body waste rail unit for reflecting the present invention in a mass production system.

7B is a sectional view showing a reinforcing structure of the rear end panel portion of a vehicle body;

7C is a sectional view of the reinforcing structure of the roof beam.

<Brief description of symbols for the main parts of the drawings>

11: waste rail 12: body rear end filler

13: Roof Bow 31: Survival Space Panel

32: front body 33: the middle of the body

34: rear part of the body 41: waste rail

42: Rear engine rear drive end pillar

43: Roof Bow 44: Steel having a cross section

45: steel with 'b' cross section 46: steel pipe with 'b' cross section

47: Window Piller 51: Survival Space Panel

52: body front 53: body part in the middle

54: rear part of the body 55: steel having a cross section

56: square tube of square tube

Hereinafter, a bus body reinforcing structure according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

When the vehicle is overturned through the vehicle overturning experiment, the deformation of the vehicle body occurs in the coupling part of the window pillar 47, which is the upper part of the vehicle body, such as the end pillar part 42, the body front part, and the waste rail part 41 of the rear part of the vehicle body. (47) It can also be seen that securing the rigidity of the joint is very important.

4 is a side view showing the body reinforcement portion of the bus according to an embodiment of the present invention, as shown in Figure 4, the waste rail portion 41 of the vehicle body and the rear end pillar portion 42 of the vehicle body, the roof beam 43 The position where the body structure of the bus is reinforced is shown.

FIG. 5A is a cross-sectional view of the structure of the waste rail part 41 of the bus body, in detail referring to the reinforcement content of the result of the vehicle rollover test. Reinforce the vertical mounting of the steel 44 having a cross-section of the letter '2.3' shape of 2.3 mm thick outside the waist rail portion 41 to a length of about 0.4 m.

FIG. 5B is a cross-sectional view of the structure of the rear end pillar part 42, and when the reinforcement details are mentioned in detail, a thickness of 3.2 mm is provided on the outside of the rear end end filler part 42 that invades the living space when the vehicle is rolled over. Steel 45 having a 'b' shaped cross section having a length of 600 mm is reinforced by welding up to 450 mm in the top and 150 mm in the bottom in the vertical direction.

FIG. 5C is a cross-sectional view of the structure of the roof beam 43. The roof beam 43 having a weak result in the thickness and structure of the middle part of the body roof after the test has a thickness of 1.2 mm and a length of 600 mm. Steel pipe 46 of the cross section is welded to the middle part of the body roof in the horizontal direction to fix and reinforce.

Referring to the accompanying drawings in detail with reference to the accompanying drawings after the bus body reinforcement, Figure 6a is a view showing a front portion of the vehicle body after the reinforcement for the overturn test according to an embodiment of the present invention, Figure 6b Is a view showing the middle portion of the vehicle body after the reinforcement for the overturning test according to an embodiment of the present invention, and Figure 6c is a view showing the rear part of the vehicle body after reinforcement for the overturning test according to an embodiment of the present invention. to be.

In each figure, the line A2 is a line representing the vehicle body before the experiment, the line B2 is a line representing the vehicle body after the experiment, and the line C2 is a line representing the pin tip after the experiment.

As shown in FIG. 6A, the margin between the body fin end C2 and the living space panel 51 before the reinforcement was increased to 79 mm after the reinforcement, and as shown in FIG. 6B, the middle part of the vehicle body 53 was illustrated. After the reinforcement, the margin between the body fin end C2 and the living space panel 51 increased to 100 mm after the reinforcement. As shown in FIG. 6C, the margin of the rear portion 54 of the vehicle body before the reinforcement was increased to 55 mm after the reinforcement.

With reference to the accompanying drawings will be described in detail the bus body reinforcement for reflecting in the mass production system within the minimum change range of the body.

FIG. 7A is a cross-sectional view showing the reinforcing structure of the waste rail unit for reflecting the mass production system, FIG. 7B is a cross-sectional view showing the reinforcing structure of the rear end pillar unit of the vehicle body, and FIG. 7C is a cross-sectional view showing the reinforcing structure of the roof beam.

As shown in FIG. 7A, the inside of the cross section of the waste rail 41 of the vehicle body Reinforcing by attaching the steel (55) having a 'c' cross section by welding, and as shown in Figure 7b, the rear end pillar 42, the reinforcement specification to compensate for the problem that the bending occurs in the end portion after the experiment Attach the steel 45 with 'b' cross section up to the upper 450 mm to the cant rail and attach the lower part up to 150 mm, and inside the cross section of the steel Attachment reinforcement of the steel pipe 56 by welding.

As shown in FIG. 7C, the roof beam 43 is fixedly reinforced with a steel pipe 46 having a '┗┛' shape in a horizontal direction by welding to the middle portion of the roof of the vehicle body.

The bus body reinforcement structure according to the present invention described above reinforces only the fillers of the corresponding parts without changing the parts of the current specification while improving the safety of passengers in the event of the bus overturning, and also local reinforcement instead of the overall change of the body structure. Therefore, the scope of development and changes in production facilities are minimized.

Claims (2)

In the bus body structure, the waste rail portion 41 of the vehicle body mounts and reinforces the steel 44 having the letter 'A' cross section on the outside in the vertical direction, and the rear end pillar portion 42 of the body body is on the outside. Mounting and reinforcing the steel member 45 having a ruler cross section in the vertical direction, the roof beam 43 is characterized in that the reinforcement of the middle part of the body roof by mounting the steel pipe 46 of the '┗┛' cross section in the horizontal direction Bus body reinforcement structure. In the bus body structure, the waist rail portion 41 of the vehicle body is mounted and reinforced with a steel 55 having a 'c' cross section inside thereof in the vertical direction, and a 'ㅁ' inside the rear end pillar portion 42 of the vehicle body. The steel beam 56 having the ruler cross section is mounted and reinforced in the vertical direction, and the roof beam 43 is mounted with the steel pipe 46 having the '강' shape in the horizontal direction to reinforce the middle part of the body roof. Bus body reinforcement structure.