JPH11200400A - Vibration generating type hydraulic cylinder device for construction working machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continue excavation by vibrating the tip blade of a bucket when lumps of rocks are found during excavation of ground with the bucket, by generating vibration automatically by a constant oil pressure by providing a vibration generator at a cylinder piston. SOLUTION: A piston portion 14 and a vibration generator 15 is provided at the piston 13 of the cylinder equipment 10, at the vibration generator 15, oil pressure flowing in from an oil pressure inlet 23 moves a shuttle valve 22 and a hammer 20 up and down and is then discharged from an exhaust port 25, and the vibration is transmitted to the piston rod 11. This cylinder equipment 10 is installed to the arm of a working motor vehicle, a power link is connected to the tip of a rod 11 and the bucket is rotated. By doing this, at the time of ground excavation by bucket, the vibration generator 15 vibrates automatically when a constant oil pressure acts to the piston 13 thereby vibrating the tip blade of the bucket and continuing the excavation. Also, a pushing cylinder case and a vibrating cylinder case may be connected in series for generating vibration by supplying the oil pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration type hydraulic cylinder device for improving the work processing capability of a hydraulically driven working device connected to a construction machine.

[0002]

Various working machines connected to construction machines such as hydraulic excavators are operated by hydraulic cylinders mounted on construction machines (working vehicles). It is specified by the product of the piston surface area and the hydraulic pressure, and since the arm or the support frame is also designed in this capacity range, it is not practical to work more than the specified capacity, and it has been decided that it should be avoided. However, in an actual site, there is a case where it is desired to individually obtain a performance exceeding a specified capability for a short time. For example, when rock mass exists partially in the ground excavation with a bucket,
In some cases, it is desirable to be able to continue work without interrupting work.

[0003] In this case, the present invention increases the working capacity by vibrating the tip blade or the tooth of the bucket so that rocks and the like can be easily scooped without applying an excessive load to the hydraulic cylinder. It is.

[0004]

The vibration generating device according to the present invention is a hydraulic cylinder device for driving a working device connected to the tip of a working vehicle arm. The first invention has a vibration generating mechanism built in an upper part of a piston. A vibrating section is configured, and the vibration generating mechanism automatically vibrates by pressure oil supplied into the cylinder. The configuration of the vibration generating mechanism according to the present invention is as shown in FIG. 3 and no accumulator is provided because strong vibration pressure is not required. According to a second aspect of the invention, the hydraulic cylinder device is divided into a pressing cylinder and a vibration generating cylinder, and these are connected in series. The configuration of the vibration generating cylinder is the same as that of the first aspect. The configuration of the pressing cylinder is the same as that of a normal hydraulic cylinder. The pressure oil for both cylinders is supplied by separate operating valves or by a common valve connected in parallel to both cylinders. In any of the above cases, the working device is vibrated while being pressed or held at a predetermined position to perform work.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a bucket as a working device, which is connected to an end of an arm 2 of a working vehicle (not shown) by an arm pin 3. Reference numeral 10 denotes a cylinder device of the present invention, in which the tip of a piston rod 11 is connected to a working device via a power link 5. 6,7
Is a connecting pin, and 8 is a guide link. In FIG. 2, 12
Denotes a cylinder case, 13 denotes a piston having a built-in vibration generating mechanism, 14 denotes a piston part, and 15 denotes a vibration part. 16,
Reference numeral 17 denotes a pressure oil port, and reference numeral 18 denotes an operation valve. The principle of the vibration generating mechanism is the same as that of a known hydraulic breaker, but the structure is as shown in FIG. 3 and does not include an accumulator unlike the hydraulic breaker. 20 is a hammer,
21 is a bypass valve, 22 is a shuttle valve, 23 is a pressure oil inlet, and 24 and 25 are discharge ports. The shuttle valve 22 and the hammer 20 move up and down due to the inflow of pressure oil, and the hammer 20
By hitting the top dead center and the bottom dead center, an axial vibration is transmitted to the rod. For example, when the working device is a bucket and is performing excavation work, the piston 13 is pressed downward with a constant force, and vibrates in this state. The apparatus shown in FIG. 4 is one in which a cylinder case is divided into two sections, and a pressing piston and a vibrating piston are respectively housed therein. 12a is a pressing cylinder case, and 12b is a vibration cylinder case. The configuration of the vibration cylinder is the same as that of the apparatus shown in FIG. Numeral 30 denotes an intermediate bearing member fitted to a flange connection portion of both cylinder cases, and a rod 3 for connecting the pressing piston 31 and the vibrating piston 13.
Insert 2. 16a, 17a, 16b and 17b are pressure oil ports, respectively. Although the apparatus shown in the figure has one operating valve 18, an operating valve can be provided for each cylinder to separate the hydraulic circuit.

[0006]

The vibration type hydraulic cylinder device according to the present invention is mounted in the same manner as a conventional operation cylinder provided side by side with a work vehicle arm, and the operation by an operator can be performed in the same manner as before.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a mounting state of a device of the present invention.

FIG. 2 is a longitudinal sectional view of the first invention device.

FIG. 3 is a schematic sectional view of a vibration generating mechanism.

FIG. 4 is a longitudinal sectional view of a second invention device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Working device 2 Work vehicle arm 10 Cylinder device 11 Piston rod 12 Cylinder case 13 Vibrating piston 14 Piston portion 15 Vibrating portion 18 Switching operation valve 20 Hammer 21 Bypass valve 22 Shuttle valve 12a Pressing cylinder case 12b Vibrating cylinder case 30 Intermediate Bearing 31 Pressing piston 32 Connecting rod

Claims (4)

[Claims] 1. A hydraulic cylinder device for driving a working device connected to an end of a working vehicle arm, comprising: a vibrating section having a built-in vibration generating mechanism by pressurized oil at an upper portion of a piston of the cylinder; A hydraulic cylinder device for a continuously installed working machine, wherein vibration is generated by cylinder supply pressure oil. 2. A hydraulic cylinder device for driving a working device connected to a tip of a working vehicle arm, wherein a cylinder case is divided into a pressing cylinder case and a vibration generating cylinder case and connected in series, and a piston of each cylinder is connected. Is connected by a connecting rod, and provided with a vibrating portion having a built-in vibration generating mechanism using pressure oil at the upper part of the piston in the vibration generating cylinder case, wherein the piston generates vibration by cylinder supply pressure oil when stopped. Characteristic hydraulic cylinder device for continuous work machines. 3. The cylinder device according to claim 2, wherein
A hydraulic cylinder device in which pressure oil supplied to each cylinder is supplied through a common operation valve. 4. The cylinder device according to claim 2, wherein
A hydraulic cylinder device in which the cylinder case on the working device side is a cylinder case for generating vibration.