WO2019065273A1

WO2019065273A1 - Vehicular protector member

Info

Publication number: WO2019065273A1
Application number: PCT/JP2018/033973
Authority: WO
Inventors: センティビナーヤガムチャンドラセカラン
Original assignee: ダイムラー・アクチェンゲゼルシャフト; 三菱ふそうトラック・バス株式会社
Priority date: 2017-09-29
Filing date: 2018-09-13
Publication date: 2019-04-04
Also published as: JP2019064419A

Abstract

[Problem] To provide a vehicular protector member that has a simple structure, stays strong enough to withstand impact from above, suppresses production costs, and contributes to weight reduction. [Solution] A protector member 7 that comprises a single metal plate 13 that has been bent multiple times. The protector member includes: a hollow member 15 that has a first surface 17a that faces the center side of a vehicle, a second surface 17b that faces the first surface, a third surface 17c that connects the first surface and the second surface on a vehicle height direction top side, and a fourth surface 17d that connects the first surface and the second surface on a vehicle height direction bottom side; and an intermediate plate 17e that is formed from an end part of the metal plate, is provided between the first surface and the second surface, and extends in the vehicle width direction. The first surface or the third surface of the hollow member is connected to the vehicle, and the intermediate plate is positioned between the third surface and a vehicle height direction middle plane that is between the third surface and the fourth surface.

Description

Vehicle protector member

The present invention relates to a vehicle protector member disposed at the front-rear direction end of a vehicle.

In vehicles with high vehicle height such as large buses and truck vehicles, protector members (underrun protectors) via stays at the front and rear ends of the chassis frame to prevent the passenger car from getting into the space between the chassis frame and the road surface. Is attached.
A hollow member is used for such a protector member. Recently, as disclosed in Patent Document 1, in order to improve the strength of the hollow member, reinforcement is performed by a method of providing an intermediate plate inside the hollow member.

JP 2003-276535 A

By the way, in the protector member attached to the end of the vehicle, the impact at the time of a collision tends to be concentrated on the upper portion of the protector member.
As a countermeasure against this, in the case of a protector member constituted by a hollow member, means for providing a reinforcing member other than the middle plate may be taken.

However, in the same means, the manufacturing cost of the hollow member is increased or the weight of the hollow member itself is increased because the step of separately providing the reinforcing member is increased. In particular, the hollow member provided with the above-described inner plate is generally manufactured by casting, so that the manufacturing cost tends to increase, and the weight of the hollow member itself tends to increase. As a result, the problem becomes more serious, which leads to the deterioration of the fuel efficiency of the vehicle and the reduction of the loadable capacity of the truck.

Therefore, an object of the present invention is to provide a vehicle protector member that has a simple structure, ensures strength that can withstand an impact from above the protector member, and suppresses manufacturing costs and contributes to weight reduction of the protector member. It is in.

An aspect of the present invention is a protector member consisting of a single metal plate which is disposed along the vehicle width direction at the front end or rear end of the vehicle and is bent a plurality of times, and is made of a metal plate on the center side of the vehicle A first surface facing the first surface, a second surface facing the first surface, a third surface connecting the first surface and the second surface at the upper side in the vehicle height direction, and the first surface A hollow member extending in the vehicle width direction, having a fourth surface connecting the second surface on the lower side in the vehicle height direction, and an end of a metal plate, and between the first surface and the second surface And an intermediate plate extending in the vehicle width direction, wherein the first surface or the third surface of the hollow member is connected to the vehicle, and the intermediate plate is connected to the vehicle having the third surface and the fourth surface. It is provided so as to be located between the intermediate surface in the high direction and the third surface.

Such a hollow member has a structure in which a single metal plate is bent a plurality of times to form an intermediate plate inside and has a cylindrical shape extending in the vehicle width direction, so it is lightweight and easy to manufacture.
In particular, the intermediate plate inside the hollow member is offset to the upper third surface side from the intermediate surface having the intermediate position, not the intermediate position between the general third surface and the fourth surface. The overall configuration of the hollow member remains the same, and only the strength in the upper space portion in the hollow member partitioned by the intermediate plate is increased, so the weight reduction and the manufacturability of the hollow member are left unchanged. The strength of the third surface side can be increased.
That is, the strength which can endure the impact from the upper part of a protector member is easily secured by simple structure, and control of a manufacturing cost and weight reduction of a protector member can be attained.

Preferably, the first surface or the third surface of the hollow member is connected by the connecting member to the end of the stay projecting downward of the vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the protector for vehicles attached to the vehicle used as the aspect which concerns on the 1st Embodiment of this invention. The perspective view which partially cut out which shows the hollow member which comprises the protector for the vehicles. Sectional drawing of the hollow member which follows the AA in FIG. The perspective view which shows the single metal plate which comprises a hollow member. Sectional drawing explaining the process in which a hollow member is formed by several bending | flexion of the single metal plate. Sectional drawing which shows the aspect which concerns on the 2nd Embodiment of this invention.

Hereinafter, the present invention will be described based on a first embodiment shown in FIGS. 1 to 5.
FIG. 1 shows a commercial vehicle (vehicle) such as a truck intended for transportation, for example, and 1 in FIG. 1 shows a chassis frame of the vehicle. The chassis frame 1 has a ladder structure in which a pair of side rails 3 extending in the longitudinal direction of the vehicle and a cross member (not shown) extending in the vehicle width direction are combined. A cabin and a power unit (both not shown) are mounted on the front of the vehicle of the chassis frame 1, and a packing box 5 is mounted on the rear of the vehicle.

The vehicle protector member 7 (underrun protector: at least one of the vehicle-direction end of the chassis frame 1, specifically at least one of the front end and the rear end of the side rail 3) is an end in the longitudinal direction of the vehicle. Hereinafter, only the protector is provided. Only the protector 7 at the rear end of the vehicle is shown in FIG. These protectors 7 are disposed along the vehicle width direction, and prevent a passenger car or the like from getting into between the chassis frame 1 and the road surface (not shown).
The same structure is adopted for these protectors 7 for the front and rear of the vehicle. For this reason, in the present embodiment, the protector 7 disposed at the rear end of the vehicle will be described.

That is, as shown in FIGS. 1 and 2, the protector 7 is a component extending along the vehicle width direction of the vehicle. The protector 7 is fixed to the tips of a pair of stays 9 protruding downward from the rear end of the side rail 3. Incidentally, for the pair of stays 9, a component having a mounting seat 10 extending in the vehicle rear direction and extending in the vehicle height direction at the extension end is used. The protector 7 is assembled to a mounting surface of the mounting seat 10 facing the rear of the vehicle.

This protector 7 is comprised from the rectangular-tube-shaped hollow member 15 comprised by the process which bent the single metal plate 13 as shown by FIG. 4 and FIG. 5 in multiple times.
That is, the hollow member 15 is configured by, for example, roll forming processing. For example, the hollow member 15 sets a plurality of longitudinally extending fold lines 13a at predetermined positions of a single rectangular metal plate 13 as shown in FIG. 4 and roll forming as shown in FIG. It is molded in a molding process by a processing machine (not shown). Specifically, for example, as shown in FIGS. 5 (a) to 5 (e), the hollow member 15 bends one end 14a of the metal plate 13 according to the bending line 13a, and stands up. From this state, the remaining metal plate 13 is bent a plurality of times while being rolled along the bending line 13a, and finally, the other end portion 14b is erected to perform forming. In FIG. 5 (e), reference numerals indicating first to fourth surfaces 17a to 17d to be described later are attached.

Thereby, the hollow member 15 can be disposed at the vehicle body end as shown in the perspective view of FIG. 2 and the cross sectional view of FIG. 3 (line AA in FIG. 2), and the end 14a of the metal plate 13 is It is in the form of a square tube disposed in the hollow portion. Specifically, as shown in FIGS. 2 and 3, the hollow member 15 has a left side wall facing the center side of the vehicle as a first surface 17 a and an opposite right side wall facing the first surface 17 a. The second surface 17b, the upper wall is the third surface 17c connecting the first surface 17a and the second surface 17b at the upper side in the vehicle height direction, and the lower wall is the first surface 17a and the second surface The end surface 14a of the metal plate 13 is an intermediate plate 17e disposed between the first surface 17a and the second surface 17b. It is configured in a square tube shape. Incidentally, the intermediate plate 17e extends in the vehicle width direction at an intermediate position between the third surface 17c and the fourth surface 17d.

Such a hollow member 15 is lighter in weight than a castable hollow member by bending a single metal plate 13 into a cylindrical shape provided with an intermediate plate 17e inside, and is easy to manufacture and has a manufacturing cost. Can be suppressed.
Incidentally, the end 14a of the metal plate 13 of the hollow member 15 forming the intermediate plate 17e is joined to the second surface 17b by welding, and the end 14b of the metal plate 13 forming the first surface 17a is the intermediate plate It is joined to the corner of 17e. Reference numeral 18 in FIGS. 3 and 4 indicates the joint portion.

Further, as shown in FIG. 2, a plurality of, for example, four bolt insertion holes 19a are provided at the center in the vehicle width direction of the first surface 17a, that is, on the left side wall facing the mounting seat 10 of the stay 9 of the vehicle. Further, on the inner surface of the left side wall, a nut 19b (corresponding to a connecting member of the present application) is provided in communication with each bolt insertion hole 19a. That is, as shown in FIGS. 2 and 3, the first surface 17 a of the hollow member 15 is configured to be fastened (connected) to the stay 9 on the vehicle side by screwing the bolt 20. Thus, the hollow member 15 is assembled to the rear end of the vehicle along the vehicle width direction. The openings at both ends of the hollow member 15 are closed by the cover 21 (FIG. 1).

In the protector 7 mounted at the end of the vehicle, the impact at the time of a collision is concentrated on the upper portion of the protector 7. This is because, for example, when a collision load is applied to the protector 7 from the second surface 17b side, the load is concentrated and applied only to the upper nut 19b located near the stay 9 of the vehicle. For this reason, the hollow member 15 constituting the protector 7 may be required to have strength on the upper side (third surface 17 c side).

Therefore, in order to meet the demand for the strength, the hollow member 15 is designed to increase the strength on the upper side of the hollow member 15 while maintaining the cylindrically structured bent structure.
In the same device, as shown in FIG. 2, FIG. 3 and FIG. 5 (e), the middle plate 17e formed of the end portion 14a of the metal plate 13 and the third surface 17c of the hollow member 15 and the fourth surface It is located between the intermediate surface of 17 d in the vehicle height direction and the third surface 17 c.

Specifically, as shown in FIG. 3, the intermediate plate 17 e inside the hollow member 15 is placed on the upper third surface from the intermediate surface α, which is an intermediate position between the third surface and the fourth surface. It is offset by a predetermined amount toward the surface 17c. “Δ” in FIG. 3 indicates the offset amount.
When the intermediate plate 17e is offset as described above, the closed cross-sectional area a of the inner upper portion of the hollow member 15 partitioned by the intermediate plate 17e narrows. For this reason, the closed cross-section a of the upper stage divided by the intermediate plate 17e has an increased strength.

Here, the hollow member 15 is formed by bending the single metal plate 13 as described above into a cylindrical shape provided with the intermediate plate 17e inside, so the weight reduction of the hollow member 15 can be achieved, and the manufacture is also easy. The manufacturing cost can also be reduced.
In addition to this, the hollow member 15 is obtained by offsetting the intermediate plate 17e from the intermediate surface α to the third surface 17c side, without separately requiring a reinforcing member, the upper side of the hollow member 15 (third Only the strength of the surface 17c) increases. That is, the strength of the upper portion is enhanced while maintaining the configuration of the hollow member 15 as it is.

This can increase the strength of the upper side (the third surface 17 c side) of the hollow member 15 while maintaining the weight reduction and the manufacturability of the hollow member 15. According to the experiment, the a offset amount of the intermediate plate 17e, which is a requirement to increase the strength of the upper portion of the hollow member 15, is the height H of the hollow member 15 in the vehicle height direction as shown in FIG. When the position of the intermediate surface α is “H / 2”, the limit to “H / 4” has been taken into consideration in consideration of the size and mounting position of the nut 19 b.

As described above, the protector 7 is formed by bending the single metal plate 13 into a cylindrical hollow member 15, and the intermediate plate 17 e in the hollow member 15 is offset to make the hollow member 15 lightweight. The strength of the upper side of the hollow member 15 can be increased while maintaining the uniformity and the manufacturability.
Therefore, protector 7 can secure strength which can endure an impact from the upper part with a simple structure, and can aim at control of manufacturing cost, and weight reduction.

FIG. 6 shows a second embodiment of the present invention.
This embodiment shows the case where the stay of a vehicle does not fix the side part of the protector 7, but fixes the upper part of the protector 7.
Specifically, in the present embodiment, as in the first embodiment, the nut 19 b (connection member) is provided on the first surface 17 a of the protector 7, and the stay 9 of the side fixing type using the first surface 17 a The nut 29b is provided on the third surface 17c of the protector 7 and fixed to the upper fixed stay 39 by the bolt 30 using the third surface 17c.
Even with the protector 7 in which such a third surface 17c is attached to the stay 9, the same effects as in the first embodiment can be obtained.

However, in the second embodiment, the same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
The present invention is not limited to the above-described first and second embodiments, and various changes may be made without departing from the scope of the present invention.

7 Protector (Protector member)
13 single metal plate 15 hollow member 17a first surface 17b second surface 17c third surface 17d fourth surface 17e middle plate 19b nut (connection member)

Claims

A protector member comprising a single metal plate which is disposed along the vehicle width direction at a front end or a rear end of a vehicle and which is bent a plurality of times,
The first surface formed of the metal plate and facing the center side of the vehicle, the second surface facing the first surface, the first surface, and the second surface in the vehicle height direction A hollow member extending in the vehicle width direction, comprising: a third surface connected on the upper side; and a fourth surface connecting the first surface and the second surface on the lower side in the vehicle height direction;
And an intermediate plate which is an end portion of the metal plate, is provided between the first surface and the second surface, and extends in the vehicle width direction,
The first or third surface of the hollow member is connected to the vehicle,
The intermediate plate is provided so as to be located between an intermediate surface between the third surface and the fourth surface in the vehicle height direction and the third surface. .
The front end or the rear end of the vehicle has a stay that protrudes below the vehicle.
The vehicle protector member according to claim 1, wherein the first surface or the third surface of the hollow member is connected to an end of the stay by a connection member.