JPS6033685B2 - dump truck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dump truck with the largest cargo box that has improved discharge performance.

A general dump truck must satisfy at least the following conditions.

{1} It is necessary to increase the dumping angle of the cargo box to improve discharge performance.

'2} During maximum dumping, it is necessary to increase the gap between the bottom of the rear end of the cargo box and the ground to improve discharge performance.

By moving the dump hinge closer to the rear wheels, it is necessary to avoid generating a large bending moment at the rear of the chassis frame during dumping.

By the way, the above {1},
It is necessary to satisfy the conditions [2} and '3}, but if you try to satisfy the condition m above when designing a dump truck with a good size auxiliary box, it is necessary to satisfy the condition {3). If you try to satisfy condition [2}, you will not be able to satisfy the condition of glue, and if you try to satisfy condition '3}, you will not be able to satisfy the condition of river and {2}. I will not be able to do it.

The present invention provides a special dump truck with a long cargo box that can satisfy all of the conditions [1], (2), and [3] above.

The embodiment will be explained below with reference to the drawings. 1 is a chassis frame, 2 is a rear subframe attached to the rear of the chassis frame, 3 is a front subframe attached to the front of the chassis frame 1, and 4 is a rear subframe. A rear cargo box 5 mounted on a frame 2 is a front cargo box mounted on a front subframe 3, and a rear cargo box 4 and a front cargo box 5 are mounted independently.

The rear cargo box 4 is composed of both side walls 6, 6 and a sliding door 7 which is supported on the upper part of the rear end of the both side walls 6, 6 and can be opened and closed.
The front side of the rear cargo box 4 is closed so as to be compatible with the front cargo box.

At the bottom of the rear cargo box 4, a conveyor 8 is installed which has a sufficient width corresponding to the width of the cargo box 4 and is transferred in the front-rear direction.

The front cargo box 5 is composed of both side walls 99, a front wall 10, and a bottom plate 11, and the rear surface of the front cargo box 5 is formed in the shape of a gate.

The front cargo box 5 is attached to the front subframe 3 adjacent to the rear wheels 12.
The telescopic cylinder 15 is supported by a hinge pin 14 on a hinge bracket 13 provided at the bottom of the cargo box 5, and between the bottom of the cargo box 5 and the front subframe 3 is a telescopic cylinder 15 capable of moving the cargo box 5 backward about the pivot support. It has been intervened.

Next, the connection between the rear cargo box 4 and the front cargo box 5 will be explained with reference to FIGS. 2 and 3. The bottom plate 11 of the front cargo box 5 ends at a position slightly forward of the hinge pin 14, and At the end, a span plate 16 having a length such that its tip can be joined to the front upper surface of the conveyor 8 is supported by a shaft 173 so as to be able to swing up and down.

Also, both side walls 9, 9 of the front cargo box 5 are connected to both side walls 6 of the rear cargo box 4.
, 6 and the rear ends of the side walls 9, 9 and the side wall 6.
, 6 are polymerized.

Furthermore, the tip of the conveyor 8 is such that even when the front surgical box 5 is fully dumped backward, the rear end surface of the side walls 9, 9 is
It is placed so that it will not hit the object. 18 is fan door 7
This opening/closing device 18 is a bending link 1 connected between the lower part of the fan door 7 and the subframe 2.
9 and an operating lever 20 for rotating the bending link 19.

In addition, 21 is a motor that drives the conveyor 8, and 22 is a side wall 6.
, 6 and the conveyor 8 surface.

The present invention has the following configuration, and now to explain the operation for discharging the loaded object, first, by rotating the operation lever 20, the fan door 7 is opened.
to be opened.

Next, the conveyor 8 is driven to first discharge the earth and sand loaded in the rear cargo box.

When the load in the rear cargo box 4 is completely discharged, the cylinder 15 is then activated to dump the front cargo box 5 rearward, thereby dumping the load in the front drop box 5 into the rear cargo box 4. Inward passing platform 1
6, and then by driving the conveyor 8, the loaded items can be discharged from the opening □ at the rear end of the cargo box 4.

When dumping the front cargo box 5 described above, the transfer platform 16
Since the bag branch 17 is located in front of the hinge part, this pivot branch 1
7 will move upward in connection with the dump operation,
As a result, the transfer table 16 is tilted rearward to smooth the rearward flow of the loaded material.

As described above, the present invention mounts the rear drop box and the front cargo box independently on the chassis frame, and installs a conveyor at the bottom of the rear cargo box that can discharge the loaded items rearward. The front cargo box can be moved to the rear, allowing the loaded items in the front cargo box to be transferred to the rear cargo box, thereby alleviating the problems associated with dump trucks with long cargo boxes. This can be solved by

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing a dump truck of the present invention, FIG. 2 is a longitudinal sectional view, and FIG. 3 is a sectional view taken along line AA in FIG. 2. 1 is the chassis frame, 4 is the rear cargo box, 5 is the front cargo box, 8
is a conveyor. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A rear cargo box and a front cargo box are mounted independently on the chassis frame, and a conveyor that has sufficient width and rotates in the front and rear direction is installed at the bottom of the rear cargo box, and the front The cargo box is installed so that it can tilt backwards, and by dumping the front cargo box rearward, the loaded items in the front cargo box are transferred to the rear cargo box, and then the loaded items are transferred by the conveyor to the back of the rear cargo box. A dump truck that can be discharged from the end.