JPH0473518B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an automatic earth removal type earth drill equipped with a drive device for rotating a bucket.

(Prior Art) The present inventors proposed that, like a conventional earth drill,
Instead of attaching the bucket to the lower end of the telescopic Kerry bar, we have developed a system in which the bucket is rotatably attached to an attachment supported by the arm of a working machine, and a bucket drive motor is mounted on the attachment. This structure does not require the kely bar required for conventional earth drills, and is also characterized in that it can be easily attached to various working machines and can be used to drill vertical holes. This earth drill has a bottom cover that can be opened and closed using a pivot pin, just like before.To open the bottom cover, turn the handle that protrudes from the top of the bucket, just like before. Open the bottom cover by turning the latch that holds it in place, and then lift the bottom cover by hand to close it. Furthermore, in conventional earth drills, the bottom cover is closed by grounding the bottom cover and lowering the bucket.

(Problems to be solved by the invention) As described above, in the conventional earth drill,
The bottom cover is opened by turning the handle by hand, and when it is closed, the bottom cover must be lifted by input, or the bottom cover must be grounded and the bucket lowered, which is labor-intensive, troublesome, and dangerous. There was a problem.

Furthermore, conventional earth drills have a problem in that when the excavated soil is clayey, it is difficult to remove the earth and sand that has been taken into the bucket.

(Means for Solving the Problems) The earth drill according to the present invention is equipped with a drive motor for the earth drill bucket on an attachment attached to a movable support such as an arm of a working machine in order to automate the opening and closing of the bottom cover. and a rotary cylinder rotated by the drive frame is provided on the attachment so as to protrude downward, and a lower part of the rotary cylinder is provided with:
An earth drill bucket with an openable bottom cover is installed, a cylinder for opening and closing the bottom cover is connected with its tube to the attachment and fitted into the rotary cylinder, and a rod is connected to the bottom cover with a rotary joint and a movable cylinder. It is characterized by being connected and attached via a bendable member.

Further, the earth drill according to the second invention is further provided with a soil removal plate on the rod, and soil is removed by lowering the earth removal plate into the bucket at the same time as the bottom cover is opened. be.

(Example) An example of the present invention will be described below with reference to FIG. Reference numeral 1 denotes an attachment connected to and supported by the arm A of the working machine.As an example of the working machine, as shown in Utility Application No. 60-36136 by the present inventors, a self-propelled working machine is used. A horizontal telescoping arm is attached to the loading platform via a swivel platform, and a vertical telescoping arm is attached to the tip of the arm for attaching a work tool such as a bucket.In addition, there are also those with an undulating arm or a hanging arm. Other working machines that can provide excavation reaction force can be used. Alternatively, a bucket can be attached to a stationary movable support.

The attachment 1 is a cylindrical body 1A connected to the arm by a pin (2 is a pin hole) or the like.
and a hollow body 1B connected to the cylindrical body 1A with bolts 3. A rotating cylindrical body 7 is rotatably attached to the hollow body 1B concentrically with the cylindrical body 1A by means of upper and lower bearings 5 and 6 so as to protrude downward, and a gear 8 is fitted into the rotary cylindrical body 7. It is worn.
Further, a hydraulic drive motor 9 is installed on the hollow body 1B, and a gear 10 attached to the output shaft of the drive motor 9 is meshed with the gear 8.

A flange 11 is welded to the lower end of the rotating cylinder 7, and the flange 11 is connected to the top plate 13 of the cylindrical bucket 12 with bolts 14, so that the bucket 12 is installed concentrically with the rotating cylinder 7. ing. The bottom opening of the bucket 12 has a bottom lid 1.
6 is attached so that it can be opened and closed about a pivot pin 15.

17 is a hydraulic cylinder for opening and closing the bottom cover 16, and the end of the tube 17a is connected to the cylindrical body 1A.
Connected by pin 19 to metal fitting 18 screwed inside,
And the cylindrical body 1A, the rotating cylinder 7 and the bucket 12
Attach by inserting it into the center hole 13a of the top plate part 13,
The piston rod 17b is connected to the bottom cover 16 by a rotating joint 20 and a flexible member 21. The flexible member 21 has a rotation joint 2 at the upper end.
an upper rod 23 connected to 0 by a pin 22;
The lower rod 26 is connected to the lower end of the upper rod 23 by a pin 24, and the lower end is connected to the bottom cover 16 by a pin 25. As the flexible member 21, a rope, chain, belt, etc. can be used.

According to this configuration, when the cylinder 17 is contracted, the bottom cover 16 is closed as shown by the solid line, and when the cylinder 17 is extended, the bottom cover 16 is closed.
can be opened by its own weight as shown by the two-dot chain line. Further, during excavation, the rotational force of the drive motor 9 is transmitted to the bucket 12 via the gears 10, 8 and the rotary cylinder 7, and the bucket 12 and the bottom cover 16 are rotated.
1 are connected via the rotation joint 20, so the piston rod 17b does not rotate.

The operation of the cylinder 17 and the drive motor 9 can be controlled by, for example, operating a control valve mounted on the work equipment using a portable switch such as a pendant switch, and the worker approaches the bucket 12. The bottom cover 16 can be opened and closed without any trouble.

Further, a drive motor 9 and a cylinder 17 are attached to the attachment 1, and as shown in FIG. 1, a valve device 28 for circuit sharing is installed on the hollow body 1B, and as shown in FIG. As shown in
A drive motor 9 whose primary circuit is connected to a hydraulic pump 29 and an oil tank 30 mounted on the work machine body.
Secondary circuits 32, 33 of the control valve 31 of
A control valve 38 for the cylinder 17 is inserted into the circuits 34 and 35, and the cylinder 17 is operated only when the control valve 31 is switched to the left position in the drawing. (At this time, the supply of pressure oil to the drive motor 9 is blocked by the check valve 36, so the drive motor 9 is in a stopped state.), control valve 3
By configuring the cylinder 17 to be expandable and retractable by switching 8, the number of hydraulic hoses extending from the working machine body to the attachment 1 is reduced, and hose handling becomes easy. Note that the control valve 38 of the cylinder 17 may not be of a manual type, but may be of an electromagnetic type or the like so that the cylinder 17 can be opened and closed by remote control.

FIG. 3 shows an embodiment of the second invention, in which a soil removal plate 37 having a circular shape with an outer diameter slightly smaller than the inner diameter of the bucket 12 is attached concentrically to the piston rod 17a, and the bottom cover is removed by the extension of the cylinder 17. 16
At the same time as the bucket 12 is released, the earth removal plate 37
By descending inside the bucket, dirt adhering to the inner wall of the bucket 12 can be easily scraped off.

In all of the above embodiments, the drive motor 9
Although the cylinder 17 for opening and closing the bottom cover is hydraulic, it may also be electric or pneumatic. In addition, the structure of the bucket 12 is not limited to the embodiment, and various structures can be adopted, and it is also possible to adopt a configuration in which soil is taken in from a part other than the bottom cover, and it is also possible to install a plurality of drive motors 9. can be,
It is also possible to mount the drive motor 9 concentrically with the rotating cylinder 7.

(Effects of the Invention) As described above, in the present invention, the bottom cover is opened and closed by a cylinder, so opening and closing the bottom cover does not require effort or input, reducing danger. . In addition, since the cylinder for opening and closing the bottom cover is fitted into the rotating cylinder, it is possible to rotate the cylinder to mediate the working medium (hydraulic oil, electric current, etc.) between the stationary part and the rotating part, as in the case of installing it inside the bucket. No joint is required and the structure is simple. In addition, the cylinder contracts during excavation work and expands when the bottom cover is opened, so that dirt does not adhere to the rod.

In addition, in the second invention, a soil removal plate that moves up and down as the cylinder for opening and closing the bottom lid is opened and closed is provided in the bucket, so that the soil can fall smoothly even when excavating clay soil. efficiency is achieved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of an automatic earth removal type earth drill according to the present invention, FIG. 2 is a hydraulic circuit diagram of the embodiment, and FIG. 3 is a cross-sectional view showing an embodiment of the second invention. be.

Claims (1)

[Scope of Claims] 1. A drive motor for an earth drill bucket is mounted on an attachment that is attached to a movable support, and a rotary cylinder that is rotated by the drive motor is provided on the attachment to protrude downward, and the rotary cylinder is rotated by the drive motor. An earth drill bucket with an openable bottom cover is attached to the lower part of the body, a tube of a cylinder for opening and closing the bottom cover is connected to the attachment, and the tube is inserted into the rotary cylinder, and the rod of the cylinder is connected to the bottom. An automatic earth removal type earth drill characterized by being connected and attached to the lid via a rotating joint and a flexible member. 2. A drive motor for an earth drill bucket is mounted on an attachment attached to a movable support, a rotary cylinder rotated by the drive motor is provided on the attachment to protrude downward, and a lower part of the rotary cylinder is provided with: An earth drill bucket with an openable bottom cover is installed, a tube of a cylinder for opening and closing the bottom cover is connected to the attachment, and is also fitted into the rotating cylinder, and a rod of the cylinder is connected to the bottom cover with a rotating joint and a tube. An automatic earth removal type earth drill characterized in that the earth drill is connected and attached via a flexible member, and an earth removal plate housed in the bucket so as to be vertically movable is attached to the rod.