JPH042833Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a bumper mounting structure on the cab body side of a cab-over type automobile with a frame.

(Prior Art) Conventionally, in a cab-over type automobile with a frame, for example, as shown in FIG.
A front bumper 9 is attached to the front lower part of the cab body 5 attached to the upper part of the cab body 5 via an appropriate number of front bumper stays 7, and a rear bumper 18 is attached to the rear lower part of the cab body 5 via an appropriate number of rear bumper stays 14. attached,
Alternatively, as shown in FIG. 8, the front bumper 9 is attached to the front part of the frame 1 via an appropriate number of front bumper stays 7, and the rear bumper 18 is attached to the rear part of the frame 1 via an appropriate number of rear bumper stays 14. It was attached to.

In the bumper mounting structure shown in FIG. 7, since the cab body 5 is generally mounted in a relatively movable state with respect to the frame 1, the front bumper 9
When an external force acts on , the cab body 5 receives all of this external force. As a result, the attachment portion of the front bumper stay 7 of the cab body 5 is deformed. Also, regarding the rear bumper 18, when an external force is applied in the direction of pushing the rear bumper 18, the rear bumper stay 14 of the cab body 5
The mounting part was deformed.

Therefore, in order to prevent the cab body 5 from deforming in the above case, the cab body 5 must be
It is necessary to reinforce the mounting portions of the front and rear bumper stays 7 and 14, which causes problems in that the cost of manufacturing and mounting the reinforcing members is incurred and the weight of the vehicle increases.
Furthermore, in the bumper mounting structure shown in FIG. 8, deformation of the cab body 5 is unlikely to occur in the event of a vehicle collision;
When assembling the front and rear bumpers 9 and 18 to the frame 1, there was a problem that the fit between the cab body 5 and the bumpers 9 and 18 tended to deteriorate.

(Problems to be Solved by the Invention) This invention solves the above-mentioned problems in the prior art and provides a bumper mounting structure that can be accurately mounted at the mounting position of the cab body and can transmit input during a collision to the frame. The purpose is to

(Means for Solving the Problems) In order to achieve the above object, this invention includes a cab body 5 and a frame 1 at the bottom of the cab body 5, and a front bumper 9 is attached to the cab body through an appropriate number of bumper stays 7. In a car with a frame attached to the lower front end of 5,
When the bumper stay 7 begins to deform the cab body 5 in response to an impact force applied to the front bumper 9, a plate-shaped stopper bracket contacts the frame 1 and transmits the force applied to the bumper stay 7 to the frame 1. 10 is fixed to the lower part of each bumper stay 7 with a gap from the front end of the frame 1.

(Function) When the front bumper receives an impact force due to a car collision and the cab body begins to deform, the force applied to each bumper stay is transmitted to the frame side via the stopper bracket, thereby preventing the cab body from deforming.

(Example) Next, this invention will be explained based on drawings showing an example. FIG. 1 shows a side view of the mounting portions of the front and rear bumpers of a cab-over type automobile.

In this figure, a frame 1 at the bottom of the car has great strength, and this frame 1 has a pair of side members 2 (one in the figure) on both sides.
A pipe-shaped front cross member 3 is fixed to the front end of the side member 2. At the rear end of this side member 2, there is a rear cross member 4 having a channel-shaped cross section.
is fixed with its inside facing forward. The cab body 5 is attached to the frame 1 via an appropriate number of body mount brackets (not shown) provided on each side member 2. An appropriate number of vertical members 6 (only one is shown in the figure) are provided on the lower surface of the front end of the cab body 5, and a front bumper stay 7 is attached to the front end of each vertical member 6 with two bolts 8 and nuts ( (not shown). A front bumper 9 is attached to the front part of a front bumper stay 7 attached to each vertical member 6. The stopper bracket 10 is a substantially rectangular plate-like member, and a concave surface 10a having substantially the same shape as the outer periphery of the front cross member 3 is formed at one end. The stopper bracket 10 has its concave surface 10a facing the front cross member 3, and there is some gap _g1 between the two.
is provided and fixed to the lower part of the bumper stay 7.

At the lower part of the rear end of the cab body 5, there is a horizontal plate 11 arranged behind the rear cross member 4 and substantially parallel to the rear cross member 4 at a predetermined distance. It is fixed at the bottom of the rear. Behind the horizontal plate 11 is a rear horizontal member 12 having a substantially U-shaped cross section, the upper part of which is fixed to the lower surface of the rear end of the cab body 5, and the lower part of which is fixed to the lower part of the horizontal plate 11.

As shown in FIG. 2, the rear horizontal member 12 has openings 13 formed by cutting out the top plate 12a and the vertical plate 12b at a plurality of locations. The front part of the rear bumper stay 14 is inserted into this opening 13, but at that time, the upper flange 14a of the rear bumper stay 14 is inserted into the upper plate 12a of the rear side member 12.
It is attached by bolts 16 to a support plate 15 which is disposed below and parallel to the upper plate 12a and whose front end is fixed to the horizontal plate 11. Also, the lower flange 14b of the rear bumper stay 14 is attached to the rear side member 12.
It is attached to the lower plate 12c with bolts 17. In this way, the rear bumper 18 is attached to the plurality of rear bumper stays 14 attached to the rear transverse member 12. At the location where each rear bumper stay 14 is attached, a hard rubber pad 19 is inserted between the horizontal plate 11 located in front of the rear bumper stay 14 and the rear cross member 4 to fill the gap. One or both sides thereof are adhered to the side plate 11 or the rear cross member 4.

In the above configuration, when a car collides and a force F ₁ acts on the front bumper 9 from the front as shown in FIG. 3A, this force F ₁ moves the front bumper stay 7 supporting the front bumper 9 backward As it is pushed, the vertical member 6 to which the front bumper stay 7 is attached and the cab body 5
The lower front end of the is also slightly deformed. Then, the bracket 1 attached to the front bumper stay 7
0 moves by a distance _g1 , the bracket 10 comes into contact with the front cross member 3 (see FIG. 3B). Therefore, the force acting on the front bumper stay 7 is received by the frame 1 to which the front cross member 3 is attached, so that the vertical member 6 and the cab body 5 are prevented from further deformation.

Next, due to reasons such as a car being rear-ended,
When the force F ₂ acts on the rear bumper 18 from behind, the rear bumper stay 14 that supports the rear bumper 18 is also pushed in the same direction and tries to move in the same direction. Therefore, the horizontal plate 11 is pushed forward via the rear horizontal member 12 and the support plate 15 to which the rear bumper stay 14 is attached. However, since a pad 19 is interposed between the horizontal plate 11 and the rear cross member 4, the horizontal plate 11
The force _F2 acting on the rear cross member 4 is transmitted to the rear cross member 4 via the pad 19. Furthermore, this force F ₂
is transmitted from the rear cross member 4 to the frame 1, and is received by the strong frame 1.
Deformation of the rear transverse member 12 to which the rear bumper stay 14 is attached and the cab body 5 to which the rear transverse member 12 is attached is prevented.

FIG. 4 shows a second embodiment of this invention. In this figure, a stopper bracket 10A is different from the stopper bracket 10 of the first embodiment, and has a hole 1 through which a bolt 20 for attaching the stopper bracket 10A to the front bumper stay 7 is inserted.
0Aa is a long hole as shown in FIG.
Therefore, when attaching this stopper bracket 10A to the front bumper stay 7, the stopper bracket 10A and the front cross member 3
The gap g ₁ can be easily adjusted to a desired value.

Furthermore, in this embodiment, a rear stopper bracket 21 made of sheet metal is interposed between the rear cross member 4 and the vertical plate 11A in place of the pad 19 of the first embodiment. The rear stopper bracket 21 has a top plate 21a, and in front of the top plate 21a is a front plate 21b that is perpendicular to the top plate 21a. Further, at the rear of the top plate 21a, there is a rear plate 21c that slopes rearward as the distance from the top plate 21a increases. In this rear stopper bracket 21, the lower part of the rear plate 21c protrudes downward from the lower end of the front plate 21b, and the rear plate 21c has a longitudinally elongated hole 22 in the center as shown in FIG. ing. Then, the front flange portion 14 of the horizontal plate 11A to which the rear plate 21c of the rear stopper bracket 21 is attached and the rear bumper stay 14A.
Ac is the rear plate 21c at the attachment part of the rear plate 21c.
It is formed on an inclined plane parallel to the This rear stopper bracket 21 is moved in the vertical direction (indicated by arrow C in FIG. 4) when this bracket 21 is integrally connected to the side plate 11A and the flange portion 14Ac of the rear bumper stay 14A by bolts 23. Thereby, the gap _g2 between the front plate 21b and the rear surface of the rear cross member 4 can be easily adjusted to a desired value.

(Effects of the Invention) The present invention provides a frame-equipped automobile comprising a cab body 5 and a frame 1 at the lower part of the cab body 5, and a front bumper 9 is attached to the lower front end of the cab body 5 via an appropriate number of bumper stays 7. , a plate-shaped stopper that comes into contact with the frame 1 and transmits the force applied to the bumper stay 7 to the frame 1 when the bumper stay 7 begins to deform the cab body 5 in response to an impact force applied to the front bumper 9; By fixing the bracket 10 to the lower part of each bumper stay 7 with a gap from the front end of the frame 1, when a car collides, the collision force is transmitted from the front bumper to the cab body through the bumper stay, causing the cab body to deform. However, when this cab body begins to deform, the stopper bracket comes into contact with the front end of the frame, and the impact force is transmitted to the frame, which is stronger than the cab body.
Since further deformation of the cab body is prevented, deformation of the cab body can be prevented without using a reinforcing member to reinforce the attachment part of the bumper stay to the cab body, and the bumper stay, front bumper, and stopper bracket can be Since it is attached to the cab body side and not to the frame side, the front bumper can be attached with a good fit to the cab body.

[Brief explanation of drawings]

Figure 1 shows a first embodiment of this invention, in which a side view of the front and rear bumper attachment parts of a cab-over type automobile, Figure 2 a perspective view of the rear bumper stay attachment part of Figure 1, and Figure 3 Fig. 1 is an explanatory diagram when force is applied to the front bumper, Fig. 4 is a diagram corresponding to Fig. 1 of the second embodiment, and Fig. 5 is a diagram of the fourth embodiment.
6 is a perspective view of the rear stopper bracket shown in FIG. 4. FIG. 6 is a perspective view of the rear stopper bracket shown in FIG. FIG. 7 is a side view of the mounting portions of the front and rear bumpers of a conventional cab-over type automobile, and FIG. 8 is a view corresponding to FIG. 7 of another conventional example. 1... Frame, 3... Front cross member, 4... Rear cross member, 5... Cab body, 7... Front bumper stay, 9... Front bumper, 10, 10A... Stopper bracket, 14, 14A... Rear Bumper stay, 18...Rear bumper, 19...Pad, 2
1...Rear stopper bracket.

Claims (1)

[Scope of utility model registration request] A cab body 5 and a frame 1 are provided at the bottom of the cab body 5, and a front bumper 9 is attached to the cab body 5 via an appropriate number of bumper stays 7.
In an automobile with a frame attached to the lower front end of the front bumper, when the bumper stay 7 begins to deform the cab body 5 in response to an impact force applied to the front bumper 9, the force applied to the bumper stay 7 due to contact with the frame 1. A bumper mounting structure for an automobile with a frame, characterized in that a plate-shaped stopper bracket 10 for transmitting the information to the frame 1 is fixed to the lower part of each bumper stay 7 with a gap from the front end of the frame 1.