JP2000255356A - Support structure for roll bar of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll bar support structure effective against loads applied from all directions during rollover. SOLUTION: This support structure supports a roll bar 22 with an inverted U-shaped front by means of an upper cross member 20 extending in the cross direction of a vehicle body and having a closed cross section cut on a longitudinal imaginary vertical plane. In this case, the support structure includes two holes 40, 42 bored in the top side of the upper cross member 20 such that the two ends 38, 39 of the roll bar 22 can extend therethrough, and brackets 24, 26 connected to the peripheral edges of the holes. The roll bar 22 is attached to the upper cross member 20 by connecting to the upper cross member 20 within the closed structure of the upper cross member 20 the two ends of the roll bar 22 inserted through the holes, and connecting the middle portions 48, 49 of the roll bar 22 to the brackets 24, 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll bar supporting structure suitable for an open car or a light truck having a partially omitted roof, such as a light truck.

[0002]

2. Description of the Related Art As shown in FIG. 7 in a perspective view, as a structure for attaching a roll bar 10 to an upper cross member 11, a support column 12 is projected downward from the roll bar 10, and a band 13 is wound around the support column 12. In some cases, a bolt 14 passed through 13 is screwed into a nut (not shown) fixed to the upper cross member 11, and the roll bar 10 is attached to the front surface 15 of the upper cross member 11.
The upper cross member 11 extends in the width direction of the vehicle body and is connected to the center pillar 16 at each end (Benz Automobile).

[0003]

The roll bar must not fall down even if a load in any direction is applied when the open car is overturned. However, as in the above structure, the roll bar is connected to the front surface of the upper cross member. Is not always effective for loads in all directions.

In order to increase the support rigidity of the roll bar, the load transmitted from the roll bar to the upper cross member is further effectively transmitted to panels on the left and right sides of the vehicle body.
It is preferable that the upper cross member and the panel work together to receive the load.

[0005] The present invention provides a roll bar support structure that is effective against loads in all directions applied during rollover.

The present invention also provides a roll bar support structure capable of distributing and receiving a load by effectively transmitting the load transmitted to the upper cross member to panels on the left and right sides of the vehicle body. I do.

[0007]

According to the present invention, a cross section cut by a virtual vertical plane in the front-rear direction has a closed structure, and a front shape is substantially inverted U-shaped by an upper cross member extending in a vehicle width direction. A structure for supporting a roll bar, comprising two holes formed at the top of the upper cross member so that two ends of the roll bar can penetrate, and a bracket coupled to the periphery of each hole. Is provided. The roll bar couples two ends of the roll bar inserted through the hole to an upper cross member in a closed structure of the upper cross member, and couples an intermediate portion of the roll bar to the bracket. And is attached to the upper cross member.

[0008] Loads from all directions when the vehicle is overturned are transmitted to the upper cross member via the roll bar and received by the entire upper cross member.

Since the two ends of the roll bar penetrate the top side of the upper cross member and the roll bar is connected to the upper cross member by the end and the intermediate portion, the vehicle has been overturned. Even if a load in any direction is applied to the roll bar, the roll bar does not fall down, and the load can be reliably transmitted to the upper cross member.

The present invention also provides an upper cross member having a closed structure in which a cross section cut by a virtual vertical plane in the front-rear direction has a closed structure and extending in a vehicle width direction, and a roll bar attached thereto, and is disposed on each of the left and right sides of the vehicle body. And a support panel for supporting the roll bar with the provided panel, the panel having a fitting portion at an upper portion, and a reinforcing panel coupled to the panel on each side. The upper cross member has a fitting portion at each end in the vehicle width direction that can be fitted with the fitted portion of the reinforcing panel, and the fitted portion and the fitting portion are fitted and welded. And connected to the reinforcing panel.

The load transmitted from the roll bar to the upper cross member is transmitted to the panel of the vehicle body via the reinforcing panel, and is received by the entire upper cross member, the reinforcing panel, and the panel of the vehicle body.

Since the upper cross member and the reinforcing panel are fitted together by welding the fitting portion of the reinforcing panel and the fitting portion of the upper cross member, and are connected by welding, a load from the upper cross member to the reinforcing panel is provided. Communication is carried out smoothly.
In other words, the efficiency of load transmission is high. As a result, the load transmitted from the roll bar to the upper cross member can be received by the entire upper cross member, the reinforcing panel, and the panel of the vehicle body.

In a preferred aspect, the reinforcing panel is connected to a lower cross member extending in a vehicle width direction at a lower portion.

According to this aspect, the load transmitted from the roll bar to the upper cross member is transmitted to the lower cross member via the reinforcing panel and the vehicle body panel, and the upper cross member, the reinforcing panel, and the vehicle body panel are transmitted to the lower cross member. , And the lower cross member.

The upper cross member, the left and right reinforcing panels and the vehicle body panel, and the lower cross member
When viewed from the front, it forms a rigid quadrilateral. as a result,
In particular, it has high rigidity against a load in the vehicle width direction from the roll bar.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Referring to FIG. 1 in a perspective view and FIG. 2 in a sectional view, a cross section (FIG. 2) cut along a virtual vertical plane in a front-rear direction shows a closed structure. The upper cross member 20 extending in the vehicle width direction supports the roll bar 22 having a substantially inverted U-shape in front view, and includes brackets 24 and 26.

In the illustrated embodiment, the upper cross member 2
Reference numeral 0 denotes an upper cross upper panel 28 and an upper cross lower panel 30, each of which is bent substantially in an L-shape, and flanges are overlapped and spot-welded to form a closed structure 32. As a result, the upper cross member 20 has a top side 33, a front side 34, a bottom side 35, and a rear side 3
6. The top side 33 is provided with two holes 40 and 42 through which the two ends 38 and 39 of the roll bar 22 can pass.

The roll bar 22 is formed by bending a steel bar having a circular cross section into an inverted U-shape. The roll bar 22 has strength and rigidity so that it is not deformed by a load applied when the vehicle is overturned, and may be made of hollow or solid stainless steel. The two roll bars 22 are arranged one by one at the position shown in FIG. 1 and at a position symmetrical to the position shown in FIG. 1 with respect to a virtual vertical plane including a center line extending in the front-rear direction of the vehicle body.

Of the two brackets 24, 26, the bracket 24 is connected to the periphery of the hole 40, and the bracket 26 is connected to the periphery of the hole 42. The brackets 24, 26 are composed of seats 44, 45 and semi-cylindrical receiving portions 46, 47 rising from the seats 44, 45. The brackets 24, 26 are formed by welding a steel plate or extruding aluminum or an aluminum alloy. Can be made. The seats 44 and 45 are attached to the upper side 33 of the upper cross member 20 by bolting or welding. The receiving portions 46 and 47 are provided on the roll bar 22.
And substantially half of the outer peripheral surface of the.

As in the illustrated embodiment, the brackets 24,
When the respective receiving portions 46 and 47 are made so that the roll bar 22 is in close contact with substantially half of the outer peripheral surface of the roll bar 22, the roll bar 22 is closed by the closing structure 32 of the upper cross member 20.
Easy to guide inside.

Of the two brackets 24, 26, the seat 44 of the bracket 24 is formed larger than the seat 45 of the bracket 26, and the receiving portion 46 of the bracket 24 is longer than the receiving portion 47 of the bracket 26. This is because the bracket 24 is located on the inclined portion of the upper side 33 of the upper cross member 20 as is apparent from FIG.
Based on the requirement to support 8, 39 and intermediate portions 48, 49 with substantially the same span.

The roll bar 22 has two ends 38, 39 of the roll bar 22 inserted through the holes 40, 42.
Is connected to the upper cross member 22 in the closing structure 32 of the upper cross member 20, and the intermediate portion 4 of the roll bar 22 is
8, 49 are connected to the brackets 24, 26 and attached to the upper cross member 20.

In the illustrated embodiment, the ends 38 and 39 of the roll bar 22 are bent forward, and the recesses 52 are formed in the front side 34 of the upper cross member 20 at positions corresponding to the ends 38 and 39, respectively. Provided, recesses 52 and end portions 3
8, 39 are bolted together. Further, the intermediate portions 48, 49 of the roll bar 22 are welded to the receiving portions 46, 47 of the brackets 24, 26. Thus, the roll bar 22 is attached to the upper cross member 20.

The longer the span connecting the roll bars 22, that is, the longer the distance from the bolted joint at the end to the welded joint at the middle, the higher the support rigidity of the roll bar 22. Therefore, as shown in FIG.
Roll bar 2
It is preferable that the bottom surface 50 of the second end portions 38 and 39 is inclined in the same manner as the bottom side 35 so that the bolted portion is positioned as low as possible.

FIG. 3 in a perspective view and FIG. 4 in an exploded perspective view.
The support structure of the roll bar shown in FIGS. 5 and 6 in a cross-sectional state has a closed structure in which a cross section cut along a virtual vertical plane in the front-rear direction has a roll bar 62 attached, which extends in the vehicle body width direction. The upper cross member 60 and the panels 64 arranged on the left and right sides of the vehicle body make the roll bar 6
2 and a reinforcing panel 66.

The upper cross member 60 is shown in FIGS.
Can be formed in the same manner as the embodiment shown in FIG. The roll bar 62 may be formed in the same manner as the embodiment shown in FIGS. 1 and 2, and may be attached to the upper cross member 60 by a similar attachment method, or may be attached by another attachment method. Good. This is because this support structure intends to efficiently transmit the load transmitted from the roll bar 62 to the upper cross member 60 to the reinforcing panel 66 and support the roll bar 62 with many members.

The panel 64 is, in the embodiment shown, a roof side reinforcing panel coupled to the roof side inner panel 68, and forms a closed structure in combination with the roof side inner panel 68 above the roof side inner panel 68. ing.

The reinforcing panel 66 has a fitting portion 70 at an upper portion and is connected to the panel 64 on each side. In the illustrated embodiment, the reinforcing panel 66 includes a main body 71 having a substantially U-shaped cross section, flanges 72 and 73 projecting forward and rearward from the main body 71, and a fitting portion. 70 and an abutting portion 74 protruding from the flange portions 72 and 73. The reinforcing panel 66 has a contact portion 7
4 is brought into close contact with the roof side reinforcing panel 64,
Is overlapped with the flange portion 76 of the roof side inner panel 68 and the roof side reinforcing panel 64 and is joined to the roof side reinforcing panel 66 by spot welding. The reinforcing panel 66
Further, the flange portions 72 and 73 are overlapped with the wheel house inner panel 78 and the rear side member 80 and are connected thereto by spot welding.

On the other hand, the upper cross member 60 has a fitting portion 82 at each end in the vehicle width direction which can be fitted with the fitted portion 70 of the reinforcing panel 66. 82
Are fitted and welded to the reinforcing panel 66.

In the illustrated embodiment, the upper cross member 6
Reference numeral 0 denotes an upper cross upper panel 84 and an upper cross lower panel 86, each of which is bent substantially in an L-shape, and the flange portions are overlapped and spot-welded to form a closed structure.

As shown in FIG. 4, the upper cross lower panel 86 has a front rising portion 88, a rear rising portion 89, a front portion 90 in front of the front rising portion 88, and both rising portions 88. , 89 are integrally provided with a rear portion 91. The front rising portion 88 extends upward and rearward as the front portion 90 approaches the end portion 92, and the rear rising portion 89 extends at the end portion so that the front rising portion 88 rises upward as approaching the widthwise end portion 92. The rear portion 91 is bent so that the rising height decreases as approaching the portion 92 and the rear portion 91 has a substantially triangular planar shape. As a result, in the end portion 92, the front rising portion 88, the rear portion 91, and the rear rising portion 89 become a common restraining portion 93, and the fitting portion 82
Is formed on one side. Further, a flange portion 94 is formed by bending an end of the front portion 90 downward.

On the other hand, the upper cross panel 84
A substantially vertical flange portion 96, and an inclined portion 97 inclined so as to incline forward as it goes upward from the flange portion 96;
And The joining portion 98 on the upper side of the inclined portion 97 is extended forward. The flange portion 96 is a fitting portion 82
Of the other side is formed.

The upper cross member 60 is connected to the reinforcing panel 66.
In order to join the upper cross member 60, the end 92 of the upper cross member 60 is brought above the reinforcing panel 66 and is pushed down.
Then, as shown in FIG. 5, the restraining portion 93, which is the fitting portion 82, and the flange portion 96 fit into the fitted portion 70 of the reinforcing panel 66, forming a so-called skewered shape. Further, as shown in FIG. 6, the joint 98 is formed by the contact portion 74 of the reinforcing panel 66.
And the flange portion 94 is attached to the main body portion 7 of the reinforcing panel 66.
Close to 1. In this state, the joining portion 98 and the contact portion 74 are further spot-welded or the fillet-welding is performed between the flange portion 94 and the main body portion 71, and the upper cross member 60 is joined to the reinforcing panel 66. Joint 9 of upper cross member 60
8 is further joined to the roof side reinforcing panel 64 by spot welding or fillet welding.

As shown in FIG. 3, a lower cross member 100 extends between the left and right rear side members 80 and extends in the vehicle width direction. Therefore, it is preferable to connect the reinforcing panel 66 to the lower cross member 100 at a lower portion thereof. With such coupling, the upper cross member 60
The left and right reinforcing panels 66, the roof side inner panel 68, the roof side reinforcing panel 64, and the lower cross member 100 form a rectangular rigid body in a front view.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a support structure of a roll bar of an automobile according to the present invention.

FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1, in which a roll bar is indicated by a solid line.

FIG. 3 is a perspective view showing another embodiment of the roll bar support structure of an automobile according to the present invention.

4 is an exploded perspective view of the roll bar support structure shown in FIG.

FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 4, showing a state in which the upper cross member and the reinforcing panel are combined.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 3;

FIG. 7 is an exploded perspective view showing a conventional roll bar support structure.

[Explanation of symbols]

 20, 60 Upper cross member 22, 62 Roll bar 24, 26 Bracket 33 Top piece 34 Front piece 38, 39 End part 40, 42 Hole 48, 49 Middle part 64 Panel 66 Reinforcement panel 70 Fitted part 82 Fitting part 100 Lower cross member

Claims (3)

[Claims] 1. A structure in which a cross section cut along a virtual vertical plane in the front-rear direction has a closed structure, and a roll bar whose front shape is substantially inverted U-shaped is supported by an upper cross member extending in a vehicle width direction, The roll bar includes two holes formed at the top of the upper cross member so that two ends of the roll bar can penetrate, and a bracket connected to a periphery of each hole, and the roll bar penetrates the hole. The two ends of the roll bar inserted into the upper cross member are coupled to the upper cross member in the closed structure of the upper cross member, and the intermediate portion of the roll bar is coupled to the bracket and attached to the upper cross member. In addition, the support structure of the car's roll bar. 2. An upper cross member to which a cross section cut by an imaginary vertical plane in the front-rear direction has a closed structure and extends in the vehicle width direction and to which a roll bar is attached, and panels disposed on left and right sides of the vehicle body. And a reinforcing panel having a fitting portion at an upper portion thereof and coupled to panels on the respective side portions, wherein the upper cross member is provided on the reinforcing panel. Having a fitting portion that can be fitted with the fitting portion at each end in the vehicle width direction,
A support structure for an automobile roll bar, wherein the fitted portion and the fitting portion are fitted together and welded to the reinforcing panel. 3. The support structure for a roll bar of an automobile according to claim 2, wherein the reinforcing panel is connected to a lower cross member extending in a vehicle width direction at a lower portion.