JPS6135337B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a blade device for an earthmoving machine.

Figures 1 to 3 show examples of conventional blade devices for earth-moving machines. Figure 1 shows an example of a blade device applied to a motor grader of an earth-moving machine, with the blade device, which is a working device, attached to the front of the motor grader. The side view and Figures 2 and 3 are working state diagrams.

In the drawing, a is a motor grader, b is a blade, c and d are parallel links, and e is a lift cylinder. Blade b is attached to the front of the motor grader via parallel rings c, d and lift cylinder e. .

Vehicles are used for multiple purposes, such as civil engineering work in the summer and snow removal work in the winter.

Therefore, it is necessary to select and replace blades depending on the application.

In other words, when using a large blade as shown by the solid line in Figure 1, a large capacity of soil removal (snow removal) is required.
Although it is possible to work, visibility is poor. Furthermore, when a small blade as shown by the two-dot chain line is used, the visibility is good but the working capacity is small.

Therefore, it is necessary to select a blade of appropriate size according to the degree of work in order to improve work efficiency, and it is desirable that the blade can be easily replaced.

Furthermore, as shown in FIG. 2, when the piled up soil or snow is removed by dropping it into a valley floor, river, etc., the vehicle is moved forward, which is dangerous.

Furthermore, as shown in FIG. 3, when piling work is performed, there is a height limit, and sufficient piling work cannot be carried out.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a blade device that meets the above requirements and is adaptable to multi-purpose work.

The present invention is characterized by a blade device for an earth-moving machine in which the upper and lower parts of the rear surface of the blade and the upper and lower parts of the vehicle body are connected by parallel links, and a lift cylinder is provided between the blade and the vehicle body. 〓〓〓〓
A first blade connected by forming a row link, a second blade rotatably provided on the upper end of the first blade by a hydraulic cylinder, and a second blade formed on the upper end of the second blade extending rearward from the back surface of the blade. It is equipped with 3 blades and can be used for multiple purposes with the first, second, and third blades, so it is economical because there is no need to prepare many types of blades, and it is easy to maintain and replace the blades. work will be eliminated.

The present invention is applicable to earthmoving machines such as motor graders.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 4 is a side view showing an embodiment of the blade device for an earth-moving machine according to the present invention, FIG. 5 is a perspective view of essential parts of the blade device, FIG. 6 is a front view thereof, and FIGS. 7 to 12 FIG. 2 is a side view showing a working state of the present blade device.

In FIGS. 4 to 6, A is a blade device of the present invention, which is composed of a first blade 1, a second blade 2, and a second blade 3.

The first blade 1 and the second blade 2 are
A bracket 4 fixed to the upper part of the back of the blade 1,
The second blade 2 is rotatably connected by a pin 6 via a plate 5 fixed to the back surface of the second blade 2, thereby forming a continuous earth removal surface B.

The third blade 3 is formed to extend rearward from the upper rear surface of the second blade 2, is integrally constructed with the second blade 2, and has an earth removal surface C.

7 and 8 are the first blade 1 and the third blade 3
Cutting edges 9 are fixed to the back surface of the third blade 3 at both ends above the second blade 2.

Reference numeral 10 denotes a hydraulic cylinder, one end of which is rotatably connected to a bracket 11 fixed to the first blade 1, and the other end rotatably connected to a bracket 12 fixed to the second blade 2.

Furthermore, left and right brackets 13a, 13b, and a center bracket 14 are fixed to the back side of the first blade 1, and these brackets 13a, 13b, 14
has a pin hole.

The blade device A constructed as described above is connected to the left and right brackets 13a, 13b and the left and right portions of the bracket 15 on the vehicle body side by vertical links 16, 17. The left and right brackets 13a, 13b, 15 and links 16, 17 form parallel links.

18 is a lift cylinder, one end of which is rotatably connected to the center bracket 14 and the other end to the vehicle body side bracket 15.

Note that the first blade 11 is provided with a cutout portion 1a having a width slightly larger than the thickness of the plate 5.

An example of work performed by attaching the blade device A having the above-mentioned configuration to the body of a motor grader, which is an earth-moving machine, will be described below.

When carrying out large-capacity soil removal work, the second blade 2 is connected to the first blade 1 as shown by the solid line in FIG. 7 (FIG. 4) by compressing the hydraulic cylinder 10. This is done on the earth removal surface B formed by the second blade 2 and the second blade 2.

In addition, when performing small-volume soil removal work, use the hydraulic cylinder 1.
0, and the second
Rotating and bending the blade 2 around the pin 6,
The soil removal is carried out on the soil removal surface C of the third blade 3 which is integrated with the second blade 2, and there are fewer obstructions in the field of view from the driver's seat, and a good field of view can be obtained.

In the case of work to drop piled up earth, sand, snow into a valley floor, river, etc. (see Fig. 8), after extending the hydraulic cylinder 10 and setting the blade device A to the state shown by the two-dot chain line in Fig. 7, By extending the lift cylinder 18 to raise the blade device A via the upper and lower links 16, 16, and then retracting the hydraulic cylinder 10, dirt and the like can be pushed out and removed while raising the second blade 2.

When piling up earth, sand, or snow (see Figure 9), extend the hydraulic cylinder 10 to bring the blade device A into the state shown by the two-dot chain line in Figure 7, and then extend the lift cylinder 18 to remove the blade device. raise A,
Next, the vehicle is moved forward while the hydraulic cylinder 10 is retracted.

When cutting down piles of earth, sand, or snow (see Fig. 10), after setting the blade device A to the state shown by the solid line in Fig. 7, extend the lift cylinder 18 to raise the blade device A, and then press the hydraulic cylinder 10. This is done by rotating the second blade 2 by extending it.

When grasping and transporting lumber, etc. (see Fig. 11), by extending the hydraulic cylinder 10,
〓〓〓〓
It can be gripped by the first and second blades 1 and 2.

The conveyed object is prevented from sliding down by the stopper 9.

Further, as shown in FIG. 12, earth, sand and snow can be placed on the third blade 3 and transferred to another location.

As described above, the blade device A according to this embodiment includes the first, second, and third blades 1, 2, and 3, and each blade 1, 2, and 3 is connected to the hydraulic cylinder 18.
The blade shape can be changed by the expansion and contraction operation, allowing it to be used for various tasks.

In short, according to the present invention, in a blade device for an earth-moving machine in which the upper and lower parts of the back surface of the blade and the upper and lower parts of the vehicle body are connected by parallel links, and a lift cylinder is provided between the blade and the vehicle body, a parallel link is provided to the vehicle body. A first blade formed and linked together, a second blade rotatably provided on the upper part of the first blade by a hydraulic cylinder, and a third blade formed on the upper part of the second blade to extend rearward from the back of the blade. By having this, the second blade can be rotated by the expansion and contraction operation of the hydraulic cylinder, and the blade shape can be changed in various ways, making it possible to use it for a variety of purposes. The effects of the present invention are listed below.

○B One blade device can be used for multiple purposes, so there is no need to prepare multiple types of blades.
It is economical as it saves maintenance and management effort.

○B There is no need to replace the blade device depending on the application.

○C Good visibility can be easily obtained ○D It is safe because work can be done without moving the vehicle forward in dangerous areas.

○E It is efficient because it can perform not only a single task but also various tasks consecutively.

[Brief explanation of the drawing]

Figures 1 to 3 show blade devices of conventional earth-moving machines, and Figure 1 shows the blade device applied to a motor grader of an earth-moving machine, with the blade device, which is a working device, attached to the front of the motor grader. 2 and 3 are side views showing working conditions, and FIGS. 4 to 12 show an embodiment of the blade device of an earth-moving machine according to the present invention. FIG. 4 is a side view thereof, and FIG. 6 is a front view thereof, and FIGS. 7 to 12 are side views showing various working states of the blade device. A...Blade device, B, C...Earth removal surface, 1...
...First blade, 2...Second blade, 3...Third blade, 4...Bracket, 5...Plate, 6...Pin, 7, 8...Cutting edge, 9...Stopper, 10... ...Hydraulic cylinder, 1
1, 12... Bracket, 13a, 13b... Left and right bracket, 14... Center bracket, 15...
...Vehicle side bracket, 16, 17...Link, 1
8...Lift cylinder. 〓〓〓〓

Claims (1)

[Claims] 1. In a blade device for an earth-moving machine, in which the upper and lower parts of the back of the blade and the upper and lower parts of the car body are connected by parallel links, and a lift cylinder is provided between the blade and the car body, parallel links are formed on the car body and the links are connected. It is characterized by comprising a first blade, a second blade rotatably provided on the upper part of the first blade by a hydraulic cylinder, and a third blade formed on the upper part of the second blade to extend rearward from the back of the blade. A blade device for earth-moving machinery.