JPH0439820Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a body frame for a flatbed vehicle, and particularly to a body frame structure that has sufficient strength and can reduce manufacturing costs.

[Prior Art] Among van-type vehicles for specific purposes, there is a flatbed vehicle in which the rear wheel house does not protrude and the rear floor is flat in order to make effective use of the rear compartment, and this is shown in Fig. 6. Shown below. In the figure, the rear floor F1 of the flatbed vehicle is made higher than that of a standard vehicle, and the diameter of the rear tire W is made smaller to eliminate the protrusion of the wheel house.

The rear floor F1 is supported on the lower surface by a horizontal rear frame 1 extending in the front and rear of the vehicle.
The rear end of the front frame 2 is connected and fixed to the front end of the frame. The front frame 2 supports a front floor F2 located at a lower position than the rear frame 1, and is connected and fixed to the rear frame 1 with its rear end bent greatly upward near the boundary between the front and rear passenger compartments.

To explain the details with reference to FIG. 5, the rear and front frames 1 and 2 both have a U-shaped cross section, and the front end of the rear frame 1 is fitted into the rear end of the front frame 2 and connected by welding. . An outrigger 11 is provided on the lower surface of the front end of the rear frame 1, and a rear cross member 1 extending in the vehicle width direction is provided on the outrigger 11.
2 is fixed. A bracket 21 is provided on the bent lower surface of the front frame 2, and a front cross member 22 is fixed to this bracket.

The opening of the front frame 2 is closed by a frame plate 23 to form a closed section, and the frame plate 23 has both rear end side surfaces 231 extending upward to form a floor support surface continuous with the upper surface of the rear frame 1. There is.

[Problems to be solved by the invention] By the way, the body frame of the conventional flatbed vehicle mentioned above is
Since the rear end of the front frame is significantly bent compared to the body frame of a standard vehicle (see Figure 7; W1 in the figure is the rear wheel house), both bending and torsional rigidity are reduced. In addition to being inferior to ordinary vehicles, there were problems in that the cost was high because the front frame was manufactured in relatively small quantities using a custom-made mold.

The present invention is intended to solve these problems, and aims to provide a body frame for a flatbed vehicle that has sufficient rigidity and is inexpensive to manufacture.

[Means for Solving the Problems] The structure of the present invention will be explained with reference to FIG. A frame plate 23 extending upward is provided on the upper surface of the bent portion of the frame 2, and the frame plate 23 forms a floor support surface that is continuous with the upper surface of the rear frame 1.

[Operations and Effects] In the vehicle body frame of the present invention, since the rear end of the front frame 2 is joined to the lower surface of the front end of the rear frame 1, the rise of the rear end of the front frame 2 is as small as that of a normal vehicle. Therefore, since it is possible to use a standard car mold press for molding the front frame 2, manufacturing costs can be significantly reduced.

In addition, the amount of bending of the front frame 2 is reduced, and the rigidity is also greatly improved due to the laminated closed cross-sectional structure.

[Embodiment] In FIG. 2, a front frame 2 that supports a front floor F2 has an upwardly bent rear end connected and fixed to the lower surface of the front end of a rear frame 1 that supports a rear floor F1. The details are shown in FIG.

In the figure, a rear frame 1 has a U-shaped cross section, and a rear floor panel is bonded and supported on a flange portion 1a at the edge of the opening. The front end of the rear frame 1 passes through the center of the upper half of the outrigger 11 that projects downward, and a rear cross member 12 projects from the side end of the outrigger 11 in the vehicle width direction.

The front frame 2 has a U-shaped cross section and is bent slightly upward at the rear end, and the upper edge of the inner side is welded to the lower edges of both sides of the front end of the rear frame 1. And the above front frame 2
The rear end reaches the front surface of the outrigger 11 and is fixed there by welding.

A front cross member 22 protrudes from the side surface of the rear end of the front frame 2, and the upper opening of the front frame 2 is closed with a frame plate 23 to form a closed section. Both side surfaces 231 are raised upward at the bent portions 2 and the rear ends are welded to the front end of the rear frame 1. Flange portions 231a at the upper ends of both side surfaces 231 are continuous with the flange portion 1a of the rear frame 1.

According to the vehicle body frame having the above structure, the amount of upward bending of the front frame can be made as small as that used for standard vehicles, so it is possible to manufacture the front frame by reusing a forming press used for standard vehicles. That is, as shown in FIGS. 3 and 4, the front frame 2 is made by extending the rear end of the standard vehicle's front frame (indicated by a chain line in the figure) rearward and raising its upper flange portion. It can be manufactured using a cutting die. In this way, manufacturing costs can be significantly reduced.

Further, since the front frame 2 has a small bending amount and forms a laminated closed section with the rear frame 1 at its rear end, the strength of the vehicle body frame is sufficiently high.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention, in which FIG. 1 is a perspective view of the main parts of the vehicle body frame, and FIG.
Figure 2 is a schematic side view of the whole body frame, Figure 3 is a perspective view of the rear end of the front frame, Figure 4 is a cross-sectional view thereof, Figures 5 to 7
The figures show a conventional example; FIG. 5 is a perspective view of the main parts of the body frame of a flatbed vehicle; FIG. 6 is a perspective view of part B in FIG. 6; FIG.
The figure is an overall schematic side view of the body frame of a standard vehicle. 1... Rear frame, 2... Front frame, 23... Frame plate, 231a... Flange portion (floor support surface), F1... Rear floor,
F2...Front floor.

Claims (1)

[Scope of utility model registration request] A rear frame with a U-shaped cross section that extends in the longitudinal direction of the vehicle supports a flat rear floor that eliminates the protrusion of the wheel house, and a front floor that is located lower than the rear frame. In a vehicle body frame consisting of a front frame with a U-shaped cross section connected to the front end of the rear frame, the lower surface of the front end of the rear frame is fixed to the upper surface of the rear end of the front frame to form a laminated closed cross-section structure, and A body frame for a flatbed vehicle, characterized in that a frame plate is provided on the upper surface of the bent portion and extends upward and forms a floor support surface that is continuous with the upper surface of the rear frame.