JPS5937253B2 - dump truck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a dump truck, particularly a cargo box.

BACKGROUND ART In recent years, there has been a strong demand for lower floor and lighter cargo boxes in dump trucks in order to improve running stability and the like.

However, in conventional cargo boxes, a pair of main girders are fixed vertically to the lower part of the floorboard, and a plurality of cross members are fixed horizontally, and there is a bridge between the main girder and the undercarriage. Equipped with an upper mechanism.

Therefore, since it is necessary to secure a certain storage space for the lifting mechanism and a certain strength of the cargo box by the main girder, it is necessary to provide a certain distance between the floor plate and the undercarriage, making it easy to lower the floor of the cargo box. I was unable to aim for this.

The present invention has been made in view of these points, and includes providing a floor plate of a packing box with horizontal portions on both sides and a raised portion that is continuously raised upward at the inner end of the rain horizontal portion, and The raised part is formed across both the front and rear ends of the cargo box, and by providing a lifting mechanism between the lower part of the raised part and the undercarriage, the main girder can be omitted and the cargo box can be made lower and lighter. In addition, the present invention provides a dump truck in which a certain storage space for a hoisting mechanism and a certain strength of a cargo box can be ensured.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, 1 is a dump truck, in which a cargo box 3 is mounted on a chassis 2, and a lifting mechanism 4 is provided between the chassis 2 and the cargo box 3. There is.

The chassis 2 is constructed by fixing a subframe 6 on a non-frame 5 and fixing a brace 7 on the subframe 6.

The cargo box 3 has side sliding doors 9 on both sides of a floorboard 8 and a front plate 10 on the front thereof, and a rear sliding door 11 at the rear of both side sliding doors 9 which is hinged at its upper end. 12 so that it can be opened and closed.

The floorboard 8 has left and right U-shaped sections 13 and a U-shaped section 13.
Left and right horizontal parts 14 continuous to the upper ends of the box 3 and a central raised part 15 continuous to the inner ends of the horizontal parts 14 are formed across both front and rear ends of the packing box 3.

The raised part 15 is bent and formed into a trapezoidal cross section so as to rise upward from the horizontal part 14, and the lower ends of the sloped surfaces 16 on both sides are continuous with the horizontal part 14, and the both ends of the upper horizontal surface 17 are sloped surfaces. 16, and the bent portion and the inclined surface 16 provide longitudinal strength to the packing box 3.

Further, a plurality of cross-section channel-shaped cross beams 18 are fixed at regular intervals to the lower part of the floor plate 8, and a trapezoid-shaped front cross-section is installed between the protrusion 15 and the cross beams 18. In addition, the auxiliary girder 19 with a channel-shaped cross section is connected to its upper surface and the raised part 1.
The lower surface of the crossbeam 18 is brought into contact with the upper surface of the support 7, and the cargo box 3 is placed on the vehicle chassis 2.

Further, a hinge 20 is provided between the rear part of the floor plate 8 and the rear part of the subframe 6, and the cargo box 3 is pivotally supported on the chassis 2 so as to be freely tiltable rearward.

In the lifting mechanism 4, one end of the lift arm 21 is connected to the auxiliary girder 19, the other end is connected to one end of the tension link 22, the other end of the tension link 22 is connected to the subframe 6, and the other end of the lift arm 21 is connected to the subframe 6. One end is connected to the subframe 6 and the other end is connected to the lift arm 21, and the dump cylinder 23 is driven to tilt the cargo box 3.

Therefore, when the cargo box 3 is in a horizontal state, the lower surface of the crossbeam 18 contacts the upper surface of the supporter 7, and the lifting mechanism 4 is stored below the raised portion 15.

As described above, according to the dump truck of the present invention, a raised part continuous with the left and right horizontal parts of the floor plate of the cargo box and the inner end of this rain horizontal part is provided across both the front and rear ends of the cargo box, and the lower part of the raised part and the chassis Since a lifting mechanism is provided between the dump truck and the dump truck, there is no need to provide a main girder like in the past, so the upper surface of the floor plate of the cargo box can be lowered, and the cargo box can be made lighter. Also, the center of gravity of the load can be lowered, improving running stability.

On the other hand, the raised portions can ensure sufficient storage space for the lifting mechanism as well as the strength of the cargo box, especially the bending strength in the vertical direction.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a partially sectional side view of a dump truck with some parts omitted, FIG. 2 is a plan view of a cargo box, and FIG. 3 is a line taken along line 1-11I in FIG. 1. FIG. 1... Dump truck, 2... Chassis, 3.
... Loading box, 4 ... Lifting mechanism, 8 ...
・・Floor plate, 15 ・・Rising part, 16 ・・・・・
Inclined surface, 17...Horizontal surface.

Claims (1)

[Claims] 1. A packing box is mounted on a vehicle chassis so that it can be tilted freely, and the packing box has horizontal parts on the left and right and a raised part that is continuous and raised upward from the inner end of the horizontal part, extending over both front and rear ends of the packing box. What is claimed is: 1. A dump truck comprising a floor plate with a raised part and a lifting mechanism installed between the lower part of the raised part and the chassis.