JP2007231682A - Earth removing device for earthmoving equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil removing device for earthmoving equipment comprising a means for restraining sediment from sticking to a molded board of the earth removing device without limiting earth property of earthmoving work and dispensing with frequent maintenance to reduce maintenance cost/time. <P>SOLUTION: The earth removing device 8 comprises an earth removing plate 9 having a molded board 10 of circular-arc shaped curved cross section extending in the width direction of the earthmoving equipment 2, and an exciting means 11 mounted to the earth removing plate 9 to vibrate the earth removing plate. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a soil removal device installed in an earthwork machine such as a bulldozer or a hydraulic excavator, and more particularly to a soil removal device capable of suppressing adhesion of earth and sand to a soil discharge plate.

This will be described with reference to FIG. For example, an earthwork machine such as the bulldozer 2 includes a soil removal device 8 for performing earthwork operations such as soil removal and soil removal.

The earth removal device 8 includes an earth removal plate 9 having an arc-shaped curved cross-section mold board 10 extending in the width direction Y of the earthworking machine, and by moving the bulldozer 2 forward, the earth and sand to be earthed and carried are It is wound up along the curved surface of the mold board 10.

In the earth removal device 8, when the earth and sand is, for example, a clay that contains a lot of moisture, it is likely to adhere to the surface of the mold board 10. The adhering earth and sand obstructs the smooth flow of earth and sand along the mold board 10, the bulldozer 2 requires a larger pressing force, consumes more fuel, and the amount of earth and sand that can be held by the earth removing device 8 is It substantially reduces, lowers work efficiency, and raises work costs. Accordingly, in order to remove the adhering earth and sand, the operator scrapes off using, for example, a scoop, operates the hydraulic cylinder that drives the earth removing device 8 in an impact manner, shakes the earth removing plate 9, or makes it collide with the ground. Yes.

Various improved soil removal devices have been developed to reduce the burden on the operator and to perform efficient and economical earthwork. For example, one that applies a coating agent for preventing sediment adhesion to the curved surface of the mold board 10 (for example, see Patent Document 1), one that attaches a resin plate, or one that has a plurality of protrusions (for example, see Patent Document 2) )and so on.
JP 2001-192607 A (page 2) Japanese Patent Laying-Open No. 2005-188052 (FIG. 1)

However, the improved soil removal apparatus as described above also has the following problems to be solved.

Coating, resin plate:
Since the coating agent applied to the mold board 10 and the attached resin plate are in direct contact with the earth and sand and rocks contained in the earth and sand, the wear is intense. Accordingly, frequent maintenance such as re-application of the coating agent and replacement of the resin plate is required, and the maintenance takes cost and time.

Multiple protrusions:
The plurality of protrusions provided on the mold board 10 increase the contact area with the earth and form a thin moisture layer on the surface of the mold board to prevent the adhesion of the earth and sand. Depending on the soil, the flow of earth and sand along the mold board 10 is hindered by the protrusions.

The present invention has been made in view of the above facts, and its technical problem is that frequent maintenance is unnecessary, the cost and time of maintenance can be reduced, and the soil quality of earthwork work is not limited. An object of the present invention is to provide a soil removal device for an earthworking machine provided with means capable of suppressing the adhesion of earth and sand to the mold board of the soil removal device.

According to the present invention, as a soil removal device for an earthworking machine that solves the above technical problem, a soil removal plate having a mold board with an arcuate curved section extending in the width direction of the earthworking machine, and a soil removal attached to the soil removal plate. An earth removal device for an earthworking machine is provided, characterized in that the earthing device is provided with an excitation means for vibrating a plate.

Preferably, the vibration means is attached to the back surface of the mold board. The vibration means is equipped to freely turn on and off the vibration. The vibration means is detachably mounted. The vibration means includes a hydraulic motor, a rotating shaft that is rotationally driven by the hydraulic motor, and a weight attached to the rotating shaft so as to be offset from the axis.

In another embodiment, the vibration means comprises a hydraulic breaker.

An earth removal device for an earthworking machine configured according to the present invention includes an earthing plate having a mold board having an arcuate curved cross section extending in the width direction of the earthworking machine, and an excitation that vibrates the earthing plate attached to the earthing plate. Means, and the earth excavation plate can be vibrated by the vibration means.

Therefore, vibration of the earth discharging plate can suppress the adhesion of earth and sand to the mold board. Therefore, compared to the use of coating agents, resin plates, protrusions, etc., frequent maintenance is not required and maintenance costs are reduced. -It is possible to provide a soil removal device for earthwork machines that can reduce the time and the soil quality of the earthwork work is not limited.

DESCRIPTION OF EMBODIMENTS Hereinafter, a soil removal apparatus for earthwork machines configured according to the present invention will be described in more detail with reference to the accompanying drawings illustrating a preferred embodiment of a bulldozer that is a typical earthwork machine.

The bulldozer will be described with reference to FIG. The bulldozer shown as a whole by number 2 includes a pair of left and right endless track type traveling bodies 4 and 4 and a body body 6 attached to the traveling bodies 4 and 4, in front of the body body 6 and the traveling bodies 4 and 4. The earth removal device 8 is attached to the machine body 6 so as to freely swing in the vertical direction X. The airframe body 6 is provided with an engine room 6a as a power source and a driver's seat 6b for operating the bulldozer 2 such as an operation operation of the earth removing device 8.

1 will be described with reference to FIG. The earth removing device 8 includes an earth removing plate 9 having an arc-shaped curved cross-section mold board 10 extending in the left-right width direction of the bulldozer 2 (the arrow Y direction in FIG. 7 and the direction perpendicular to the paper surface in FIG. 1). Is provided with a vibrating means 11 that vibrates the earth discharging plate 9.

The earth removal plate 9 is formed by welding and joining steel members such as high-tensile steel plates, and defines the size in the vertical direction X (the direction of the arrow X in FIGS. 7 and 1) and the horizontal direction Y. The mold board 10, the pair of side plates 12, 12 joined to both ends in the width direction Y of the mold board 10, the pair of side plates 12, 12 and the back surface of the mold board 10 extend in the width direction Y of the mold board 10. The upper reinforcing plate 14, the middle reinforcing plate 16, and the lower reinforcing plate 18 are sequentially joined from above.

The concave side of the mold board 10 having a curved surface is positioned on the surface of the earth discharging plate 9 that presses earth and sand, and the convex side is the back surface.

The middle reinforcing plate 16 is bent in a channel shape in cross section, and the upper reinforcing plate 14 and the lower reinforcing plate 18 are bent in a L shape in cross section and extend in the width direction Y of the mold board 10. The middle reinforcing plate 16 has the channel-shaped opening side positioned on the back surface of the mold board 10 and is joined to the mold board 10 and the side plates 12 and 12. The upper reinforcing plate 14 and the lower reinforcing plate 18 are bent at one end to the mold board 10. The other end is in contact with the middle reinforcing plate 16 and both ends in the width direction Y are in contact with the side plates 12 and 12 and are joined to each other.

Cutting edges 20 and 20, which are cutting blades, are provided at the lower end of the earth discharge plate 9 on the left and right of the center in the width direction Y, and the end bits 22 and 22 are provided on the left and right ends in the width direction Y by a plurality of bolts 24. Can be exchanged freely.

The vibration means 11 will be described with reference to FIG. 2 showing the details of the vibration means 11 together with FIG. The vibration means 11 is installed on the back surface of the mold board 10 and surrounded by the middle reinforcing plate 16. The vibration means 11 is disposed on an axis S extending in the width direction Y of the earth discharging plate 9, and a rotary shaft 11b connected to the output shaft of the hydraulic motor 11a via an elastic coupling. The rotating shaft 11b is provided with a pair of weights 11c and 11c that are attached to the rotating shaft 11b with an interval in the extending direction and biased radially outward from the axis S in the same direction.

The weight 11c is formed in a rectangular parallelepiped block shape with steel, and is provided with a double nut 11e attached to the other end of the rotary shaft 11b by a bolt 11d that penetrates the weight 11c and the rotary shaft 11b and extends in the radial direction of the rotary shaft 11b. ing.

The hydraulic motor 11a is attached to a mounting plate 26a provided integrally with the back surface of the mold board 10 by a plurality of bolts 26b. A plurality of rotating shafts 11b are integrally installed on the back surface of the mold board 10 by a pair of bearings 11f, 11f (four in total) positioned on both sides of the pair of weights 11c, 11c in the direction in which the axis S extends. The boss 26c is attached with a plurality of bolts 26d.

Thus, the vibration means 11 is detachably attached to the mold board 10.

The hydraulic motor 11a is used for high-speed rotation. By rotating the rotary shaft 11b at high speed, vibration of, for example, 10 to 50 Hz is generated by the weight 11c attached eccentrically to the rotary shaft 11b.

The middle reinforcing plate 16 will be further described with reference to FIG. 3 together with FIG. A groove bottom flat portion 16a of the middle reinforcing plate 16 extending in a channel shape is provided with a window 16b that extends in the longitudinal direction and opens in a rectangular shape for attaching and detaching / maintaining the vibration means 11. The window 16b includes a hermetic cover 16c (FIG. 1) that is detachably attached by a bolt (not shown).

Furthermore, a plurality of cutout portions 16d are provided in the longitudinal direction at the joining end portions of the side surface portions 16c, 16c on both sides of the groove bottom flat portion 16a with the mold board 10. The cutout portion 16d allows the mold board 10 to be vibrated effectively by the vibration means 11 without joining the middle reinforcing plate 16 and the mold board 10 together.

A hydraulic circuit for driving the hydraulic motor 11a of the vibration means 11 will be described with reference to FIG. This hydraulic circuit is connected to the pressure oil outlet 28c of the directional control valve for the earth discharging plate tilt of the earth discharging device hydraulic circuit 28b connected to the hydraulic pump 28a, which is equipped in the bulldozer 2 (FIG. 7). A manual two-position direction control valve 28d is provided, and a hydraulic motor 11a of the vibration means 11 is connected to the direction control valve 28d by a pair of hydraulic pipes. Since this hydraulic piping can be appropriately installed by a hydraulic hose and does not constitute a novel feature of the present invention, illustration in FIG. 1, FIG. 2, FIG. 7, etc. is omitted.

By operating the lever 28e of the direction control valve 28d, pressure oil is supplied to and discharged from the hydraulic motor 11a of the vibration means 11. The direction control valve 28d is installed around the outer plate of the machine body 6 (FIG. 7) so as to be operable from outside the machine body.

The direction control valve 28d is positioned at a “stop position” where the hydraulic oil 11a is not supplied or discharged when the lever 28e is not operated (the state shown in FIG. 4A), that is, the vibration means 11 is not operated. When the lever 28e is fully operated, the lever 28e is positioned at an “operating position” for supplying pressure oil to the hydraulic motor 11a. Thus, the excitation means 11 is freely equipped on and off.

Instead of the manual two-position directional control valve 28d and the lever 28e, as shown in FIG. 4B, a two-position electromagnetic directional control valve 28f and its operation switch 28g may be provided. The operation switch 28g is installed in the grip portion of the earth removal plate operation lever of the driver's seat 6b (FIG. 7).

Another embodiment of the vibration means will be described with reference to FIG. The vibration means 30 is provided between the upper bracket 34a and the lower bracket 34b, which are attached to the back surface of the mold board 10 so as to extend in the form of a flat plate in the vertical direction X center of the width direction Y (FIG. 7). The hydraulic breaker 32 is provided in the vertical direction.

The hydraulic breaker 32 is a well-known one for crushing rocks, concrete and the like. Therefore, the detailed description is omitted. In the hydraulic breaker 32, the main body 32a is detachably attached to the upper bracket 34a by means such as bolts (not shown), and a steel cap 36 is fitted to the tip of the chisel 32b. Is in contact with a hard rubber pad 38 that is integrally mounted on the lower bracket 34b.

A hydraulic circuit for driving the vibration means 30 will be described with reference to FIG. This hydraulic circuit is a pair of two-position hydraulic pressure units connected in series between a hydraulic circuit breaker 32 and a soil removal device hydraulic circuit 28b connected to the hydraulic pump 28a, which is installed in the bulldozer 2 (FIG. 7). An electromagnetic direction control valve 40a on the breaker 32 side and an electromagnetic direction control valve 40b on the soil discharger hydraulic circuit 28b side are provided.

The vibration means 30 includes an operation switch 44 connected to the electromagnetic direction control valve 40b for operation and connected to the electromagnetic direction control valve 40a via a timer 42. The operation switch 44 is installed in the grip portion of the earth removal plate operation lever of the driver's seat 6b (FIG. 7). The timer 42 is set to energize the electromagnetic directional control valve 40b after 0.3 seconds, for example, after the operation of the operation switch 44.

When the operation switch 44 is not operated, the electromagnetic direction control valves 40a and 40b do not supply / discharge pressure oil to / from the hydraulic breaker 32 (in the state shown in FIG. 6), that is, are positioned at the “stop position” where the vibration means 30 is not operated. When the switch 44 is operated, the switch 44 is positioned at an “operating position” for supplying pressure oil to the hydraulic breaker 32. Thus, the vibration means 30 can be freely turned on and off.

The operation and effect of the earth removal machine for earthwork machines as described above will be described.

The earth removal machine 8 of the earthwork machine includes an earth removal plate 9 having a mold board 10 having an arcuate curved section extending in the width direction Y of the earthwork machine (bulldozer) 2, and an earth removal plate 9 attached to the earth removal plate 9. A vibration means 11 (30) for vibrating is provided.

Therefore, since the soil removal board 9 is vibrated by the vibration means 11 (30), the adhesion of earth and sand to the mold board 10 can be suppressed, so that a conventional coating agent, resin plate, protrusion, etc. can be used. In comparison, it is possible to provide a soil removal device for earthwork machines that does not require frequent maintenance, can reduce maintenance costs and time, and is not limited in soil quality.

And since the vibration means 11 (30) is attached to the back surface of the mold board 10, the earth discharging board 9 can be vibrated effectively.

Furthermore, since the vibration means 11 (30) is equipped with vibrations that can be turned on and off, the vibration means 11 (30) can be operated when necessary depending on whether or not the earth and sand adhere to the mold board 10.

Further, since the vibration means 11 (30) is detachably attached to the mold board 10, soil such as clay that contains a lot of water is used depending on the soil such as soil to be processed by the soil removal device 8. When handling mainly, the vibration means 11 (30) is equipped, and when handling the earth and sand which does not adhere easily like dry sand, it does not need to remove or equip beforehand.

The vibration means 11 includes a hydraulic motor 11a, a rotating shaft 11b that is rotationally driven by the hydraulic motor 11a, and a weight 11c that is attached to the rotating shaft 11b so as to be offset from the axis S. Therefore, it is possible to provide a durable vibration means that can effectively vibrate the earth discharge plate 9 by rotation, and an existing hydraulic pressure that drives the earth discharge device 8 as a drive source of the vibration means 11. Sources can be used economically.

The hydraulic breaker 32 of the vibration means 30 is equipped with a hydraulic excavator of an earthmoving machine and is a well-known one that crushes rocks, concrete, and the like. Therefore, it is easy to obtain, economical, durable, and a driving source. As an example, an existing hydraulic power source for driving the earth removal device 8 can be economically utilized.

The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications or corrections can be made within the scope of the present invention, for example, as described below. Is.

In the embodiment of the present invention, the vibration means 11 (30) is attached to the approximate center of the back surface of the mold board 10 in the vertical direction X. However, depending on the shape of the earth discharge plate 9 and the mold board 10, etc. It may be the upper part or the lower part, or may be attached to the outer surface of the earth discharging board 9.

In the embodiment of the present invention, the vibration means 11 includes the eccentric weight 11c rotated by the hydraulic motor 11a, but an electric motor may be used instead of the hydraulic motor. Alternatively, an eccentric weight may be built in the electric motor itself.

Although the vibration means 11 in the embodiment of the present invention includes a pair of weights 11c, the number of weights can be effectively vibrated by the structure such as the size of the soil discharge board 9. One or three or more appropriate numbers may be used.

The expanded sectional view which looked at the earth discharging board provided with the vibration means comprised according to this invention in the arrow B direction of FIG. (A) The enlarged plan view which looked at the vibration means of FIG. 1 from the back side of the earth discharging board. (B) The expanded sectional view which looked at the vibration means of (a) in the AA arrow direction. The perspective view of the middle reinforcement board located in the part by which the vibration means is equipped in the back surface of the mold board of the earth removal board of FIG. (A) The hydraulic circuit diagram of the vibration means shown in FIG. 2, (b) The figure which showed the other form of the direction control valve shown to (a). The expanded sectional view of the earth removal board provided with the vibration means of other embodiment. FIG. 6 is a hydraulic circuit diagram of the vibration means shown in FIG. 5. The figure which looked at the bulldozer which is a typical example of the earthwork machine provided with the earth removal apparatus from diagonally forward.

Explanation of symbols

2: Bulldozer
8: Earth removal device 9: Earth removal plate 10: Mold board 11: Excitation means 11a: Hydraulic motor 11b: Rotating shaft 11c: Weight 30: Excitation means 32: Hydraulic breaker

Claims (6)

A soil removal device installed in an earthwork machine,
A soil discharging board having a mold board with an arcuate curved section extending in the width direction of the earthworking machine;
An earth removal device for an earthworking machine, comprising: an excitation unit that is attached to the earth removal plate and vibrates the earth removal plate. The excitation means
Attached to the back of the mold board,
The earth removing device for an earthworking machine according to claim 1. The excitation means
Equipped with vibration on / off freely,
The earth removal apparatus for earthworking machines according to claim 1 or 2, characterized in that. The excitation means
Equipped with detachable,
The earth removal apparatus for earthworking machines according to any one of claims 1 to 3, wherein The excitation means
A hydraulic motor;
A rotating shaft driven to rotate by a hydraulic motor;
A weight attached to the rotating shaft offset from the axis,
The earth removing device for an earthworking machine according to any one of claims 1 to 4, wherein The vibration means has a hydraulic breaker,
The earth removing device for an earthworking machine according to any one of claims 1 to 4, wherein

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