JPS6133096Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to variable blades for construction machinery.

Earthwork using construction machinery vehicles such as motor graders,
BACKGROUND ART In snow removal work, blades have been used that have a structure that allows the blade to be moved to an appropriate position in response to changes in work conditions such as the condition of the work site such as a road, soil quality, snow quality, etc.

The main working operations of the blade device of the motor grader will be explained with reference to FIGS. 1 and 2. FIG. 1 is a plan view showing the working posture on level ground, and shows a state in which a circle b attached to a vehicle body a is rotated left and right, and a blade c attached to the lower surface of the circle b is moved left and right. Figure 2 is a front view showing the working posture on a slope such as an embankment.
The state in which the blade c is moved up and down is shown. The amount by which the blade moves left and right or up and down in these working positions is determined by the stroke of a cylinder (not shown) installed between a guide (not shown) fixed to circle b and blade c. Once the decision was made, the limit was reached. As a result, it had the disadvantage that it was not possible to work on the left or right side or in high places.

Therefore, the present invention aims to solve the conventional drawbacks and provide a variable blade for construction machinery that has a wide range of workability and improves efficiency. ,
The blade is characterized by comprising a main guide movably supporting the sub-guide, a main hydraulic cylinder connecting the main guide and the sub-guide, and a sub-hydraulic cylinder connecting the sub-guide and the blade. By adopting a double structure for the left and right moving device of the blade, the amount of left and right movement of the blade is increased, and the application of the work is widened.

The present invention can be applied to all blades attached to construction machinery.

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

Fig. 3.4 shows an embodiment of the present invention, and Fig. 3 is a side view of the variable blade attached to the circle of a motor grader via a bracket.
FIG. 4 is a plan view including the operating state of FIG. 3.

In the figure, 1 is a circle attached to a drawbar (not shown) of a vehicle body (not shown);
are left and right main guides attached to the bracket 1a fixed to the circle 1, 3 is a sub-guide movably supported by the left and right main guides 2, 2, and 4 is movably supported by the sub-guide 3. 5 is a cutting edge fixed to the blade 4. Upper and lower rails 6, 6 are fixed to the sub-guide 3, and are slidably attached to the main guide 2, and the sub-guide 3 is movably supported by the main guides 2, 2. Further, 7 and 7 are upper and lower rails fixed to the blade 4, and are slidably attached to the sub-guide 3.
The blade 4 is movably supported by the sub-guide 3. 8 is a main hydraulic cylinder that connects and connects the back surface of the sub guide 3 and the end surface of the main guide 2, and 9 is a sub hydraulic cylinder that connects and connects the back surface of the blade 4 to the end surface of the sub guide 3.

In the variable blade configured in this way, by expanding and contracting the main hydraulic cylinder 8, the sub guide 3 moves left and right along the main guide 2 as shown by the two-dot chain line C position in FIG. By expanding and contracting the auxiliary hydraulic cylinder 9, the blade 4 moves left and right along the auxiliary guide 3.

As shown in FIG. 4, the blade 4 is moved from the C position to the D position by extending and retracting the auxiliary hydraulic cylinder 9 after the main hydraulic cylinder 8 is extended and retracted.

According to this embodiment, the amount of movement of the blade 4 in the left and right directions is greatly expanded by making full use of the two main and sub cylinders 8 and 9, and the working width on flat ground is extended.
It is possible to extend the working height on the land and obtain a wide range of workability.

The second embodiment will be described with reference to FIG. 5. FIG. 5 is a plan view showing the second embodiment in a working state.

A sub-hydraulic cylinder 11 which connects and connects the blade 4 and the sub-guide 10 is structured to expand and contract in only one direction. Further, in the sub-guide 10, only one blade 4 is movable by the sub-hydraulic cylinder 11. (After acting at the C position, it acts up to the E position.) With this arrangement, the working range in one direction is expanded compared to that of the first embodiment. As a specific example, the workability is improved especially when working on a wide sidewalk where a vehicle cannot ride over, or working on a slope (the working state shown in FIG. 2) at high places.

In short, according to the present invention, a sub-guide that movably supports the blade, a main guide that movably supports the sub-guide, a main hydraulic cylinder that connects the main guide and the sub-guide, and a sub-guide and the sub-guide. By providing an auxiliary hydraulic cylinder that connects the blade, the amount of movement of the blade in the left and right directions is expanded by the expansion and contraction movements of the main and auxiliary hydraulic cylinders, and a wide range of blade workability is obtained.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the motor grader's working position on level ground, Figure 2 is a front view showing its working position on a slope such as an embankment, and Figure 3 is the variable blade of the construction machine of the present invention. A side view showing an example of
FIG. 4 is a plan view showing the working state, and FIG. 5 is a plan view showing the working state of the second embodiment. 1... Circle, 2, 2... Main guide, 3...
Sub-guide, 4...Blade, 6,7...Rail,
8...Main hydraulic cylinder, 9...Sub-hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] A sub-guide that movably supports the blade, a main guide that movably supports the sub-guide, a main hydraulic cylinder that connects the main guide and the sub-guide, and a clothing hydraulic system that connects the sub-guide and the blade. A variable blade for construction machinery, characterized by comprising a cylinder.