JPH11116186A - Car body frame reinforcing member of wheel crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve torsional rigidity by mounting a member connecting left and right car body frames in the vicinity of the front part or the rear part of an outrigger and at the location on the lower surface of a car body frame. SOLUTION: An outrigger 20 is fixed to the lower part of a car body frame 10 and a reinforcing member 30 is provided in the front part of the outrigger 20 and in the lower part of a car body frame with respect to a type in which an outrigger beam horizontally extends in the left and right directions (an H type outrigger). The reinforcing member 30 may be provided on the rear part of the outrigger 20. The reinforcing member 30 is a plate having L-shaped cross section and is welded and fixed to the lower part of the car body frame 10 and the front part of an outrigger box up to the full width of the car body frame 10. At both the end parts of the reinforcing member 30, plates on which holes are opened at the center are mounted. Thus, the structure of the car body frame 10 is strengthened and torsional rigidity is improved by providing the reinforcing member 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing member for a vehicle body frame at the rear of a wheel crane.

[0002]

2. Description of the Related Art FIGS. 3A and 3B are a plan view and a side view, respectively, of a conventional body frame 10 at a rear portion of a wheel crane, and FIG. FIG. 4 (a),
(B) and (c) are AA and B- of FIG.
It is a B, CC cross section. As shown in FIGS. 3 and 4, the body frame 10 has a left and right box type structure in which an engine, a torque converter, a pump, and the like are arranged, and an arch type provided below an engine mounting portion. It has a structure connected by a cross member 11. As shown in FIGS. 3 and 4, an outrigger 20 is provided below the body frame 10. The outrigger 20 is shown in FIGS.
The outrigger box 21 is fixed to the lower part of the body frame 10 and the outrigger beam 22 expands and contracts horizontally (H-type outrigger). One end of the outrigger box 21 is rotatably attached to the body frame 10. There is a type (X-type outrigger) in which the other end of the outrigger box 21 is lowered at the same time as the outrigger beam 22 is extended (see FIGS. 5 and 6).

[0003]

As described above, the body frame 10 at the rear of the wheel crane has an upwardly open structure, and although the arch type cross member 11 and the outrigger 20 are provided therebetween, There is a problem that when the object is lifted in an oblique direction due to insufficient torsional rigidity, torsional deformation increases. Particularly, in the case of the X-type outrigger, since the outrigger 20 is not fixed to the vehicle body frame 10, there is a problem that the torsional rigidity is further reduced. In order to cope with such a problem that the torsional rigidity of the body frame 10 is insufficient, conventionally, the body frame has been made strong, so that the weight of the body has increased. The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a reinforcing member for a vehicle body frame at a rear portion of a wheel crane having high torsional rigidity.

[0004]

In order to solve such problems, the present invention employs the following body frame reinforcing members. That is, the invention according to claim 1 is a reinforcing member for a body frame at a rear portion of a wheel crane, which is installed near a front portion or a rear portion of an outrigger and at a position on a lower surface of the body frame to connect the left and right body frames. It is a feature. Next, according to a second aspect of the present invention, in the first aspect of the invention, there is provided a reinforcing member for a vehicle body frame at a rear portion of a wheel crane having an H-shaped outrigger,
The reinforcing member is fixed to a lower portion of the body frame and a front surface or a rear surface of the outrigger box. According to a third aspect of the present invention, in the first aspect of the present invention, there is provided a reinforcing member for a body frame at a rear portion of a wheel crane having an X-shaped outrigger, wherein the reinforcing member is fixed to a lower portion of the body frame. It is assumed that.

[0005]

The reinforcing member of the body frame according to the present invention is provided at the front or rear part of the outrigger and on the lower surface of the body frame, and connects the left and right body frames. It is easy to install and without significant weight gain,
The torsional rigidity can be increased.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A reinforcement member for a vehicle body frame according to the present invention will be described below with reference to the drawings.

[0007]

Embodiment 1 Embodiment 1 relates to a type (H-type outrigger) in which an outrigger 20 is fixed to a lower portion of a vehicle body frame 10 and an outrigger beam 22 extends horizontally left and right. FIGS. 1A and 1B show a longitudinal sectional view and a transverse sectional view of this embodiment, respectively. FIG. 1A shows FIG. 3A.
1B is a longitudinal sectional view corresponding to the DD section of FIG. 1, and FIG. 1B is a transverse sectional view of FIG. In the case of the H-type outrigger, since the outrigger box 21 is fixed to the lower portion of the body frame 10, the torsional rigidity is slightly higher than that of an X-type outrigger described later. However, since the torsional rigidity is still insufficient, the reinforcing member 30 is provided in front of the outrigger 20 and below the vehicle body frame as shown in FIG. The reinforcing member 30 is provided at the front of the outrigger 20 in FIG. 1, but may be provided at the rear of the outrigger 20.

As shown in FIG. 1, the reinforcing member 30 is a plate having an L-shaped cross section and is provided over the entire width of the body frame 10, and is welded and fixed to a lower portion of the body frame 10 and a front portion of the outrigger box 21. Have been. As shown in FIG. 1, plate members having holes at the center are attached to both ends of the reinforcing member 30. By providing such a reinforcing member 30, the structure of the vehicle body frame is strengthened, and the torsional rigidity is improved.

[0009]

Embodiment 2 In Embodiment 2, one end of the outrigger box 21 is rotatably attached to the vehicle body frame 10, and the other end of the outrigger box 21 is lowered at the same time as the outrigger beam 22 is extended. (X-type outrigger). In this type, since the outrigger is not fixed to the vehicle body frame unlike the H-type outrigger, the torsional rigidity is low and the necessity of reinforcing the vehicle body frame is great. FIG. 2 is a longitudinal sectional view corresponding to the DD section of FIG. 3A showing a reinforcing member of the vehicle body frame of the second embodiment. In the case of the X-type outrigger, since the outrigger box 21 is not fixed to the body frame 10 and moves downward, the reinforcing member 30 of the body frame cannot be fixed to the outrigger box. The member 30 is a U-shaped plate,
As shown in FIG. 2, both ends are fixed to the lower surface of the body frame 10. In FIG. 2, the reinforcing member 30 is provided at the front of the outrigger 20, but may be provided at the rear of the outrigger 20. Since the reinforcing member 30 connects the left and right body frames, the structure of the body frame is strengthened and the torsional rigidity is improved.

[0010]

According to the present invention, the reinforcing member for the vehicle body frame according to the present invention is a member for connecting the vehicle body frame of the conventional wheel crane, so that the torsional rigidity of the conventional wheel crane can be increased by a simple method.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view and a transverse sectional view showing a reinforcing member of a vehicle body frame according to a first embodiment.

FIG. 2 is a longitudinal sectional view illustrating a reinforcing member of a vehicle body frame according to a second embodiment.

FIG. 3 is a plan view and a side view showing a rear structure of a conventional body frame.

FIG. 4 is a cross-sectional view of FIG.

FIG. 5 is a plan view showing an X-type outrigger.

FIG. 6 is a sectional view taken along line FF of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Body frame 11 Arch type cross member 20 Outrigger 21 Outrigger box 22 Outrigger beam 30 Reinforcement member

Claims (3)

[Claims] 1. A vehicle body reinforcing member provided at a rear portion of a wheel crane, which is installed near a front portion or a rear portion of an outrigger and at a position on a lower surface of a vehicle body frame, and connects left and right vehicle body frames. Frame reinforcement. 2. A reinforcing member for a body frame at a rear portion of a wheel crane having an H-shaped outrigger, wherein the reinforcing member is fixed to a lower portion of the body frame and a front surface or a rear surface of an outrigger box. 2. A reinforcing member for a vehicle body frame according to claim 1. 3. A reinforcing member for a body frame at a rear portion of a wheel crane having an X-shaped outrigger, wherein the reinforcing member is fixed to a lower portion of the body frame. Element.