WO1996011306A1

WO1996011306A1 - Vibrating device for an operating machine for a hydraulic shovel

Info

Publication number: WO1996011306A1
Application number: PCT/JP1995/002010
Authority: WO
Inventors: Shinji Tomita
Original assignee: Komatsu Ltd.
Priority date: 1994-10-05
Filing date: 1995-10-03
Publication date: 1996-04-18
Also published as: JPH08105077A; CN1159843A; EP0785312A4; EP0785312A1; KR960014552A; JP3562730B2; KR0161616B1

Abstract

The present invention relates to a vibrating device for an operating machine for a hydraulic shovel for efficiently performing vibrating operations such as digging and roll-compacting work. To this end, the vibrating device comprises a rotary vibrating valve (15) for continuously switching pressure oil from a hydraulic source (10) for discharging and a vibrating mode switching valve (17) having two positions, a position where switched discharge oil is continuously discharged in one direction and another position where said oil is alternately switched for discharging, wherein discharge oil from said vibrating mode switching valve (17) is supplied to either actuators (5, 7, 9) for said operating machine or vibrating actuator (30) so as to vibrate said operating machine (1a).

Description

Description Hydraulic excavator work equipment vibration device

The present invention relates to a working machine vibration device for a hydraulic shovel, and more particularly to a vibration device that facilitates switching of a vibration mode during excavation work or rolling work of a work machine. Background technology

Conventionally, as shown in FIG. 16, a vibration device of a hydraulic vibratory pile driver is provided with a gripping device 102 that vibrates the hydraulic vibratory pile driver up and down. The pressure oil in the oscillating pressure oil supply line 109 controlled to a predetermined flow rate by the valve regulating valve 105 flows into the hydraulic motor 103 via the pipe 110, and the hydraulic motor 103 Is rotated to a predetermined number of revolutions (for example, Japanese Patent Application Laid-Open No. 57-40025). Also, by switching the direction switching valve 106, the pressure oil from the pressure oil supply unit 108 flows into the cylinder 100 via the pipeline 111 and the vibration switching valve 104. I do. At the time of this inflow, the vibration switching valve 104 operates at a frequency corresponding to the rotation speed of the hydraulic motor 103, so that the pressure oil is supplied to the inflow port 100 by switching the vibration switching valve 104. The fluid flows alternately from a and 100b, the piston 101 is moved up and down, and the gripping device 102 is vibrated.

Further, as a working machine vibration device of a hydraulic shovel, a switch means for instructing a vibration mode, and a means for intermittently supplying pressure oil to a work machine driving actuator when the vibration mode is designated. (For example, Japanese Unexamined Utility Model Publication No. 62-66058).

However, the vibration device of the hydraulic vibratory pile driver only controls the piston 102 up and down. The work machine vibration device controls the amplitude of the work machine cylinder on the upside and the amplitude on the downside thereof to be constant. Therefore, in the prior art, in the case of the compaction vibration work on irregular terrain where the ground tightening position changes, the blanking occurs and There is a problem that vibration is not given.

At this point, hydraulic shovels are often used in road construction, etc., but in excavation work, in the case of heavy sediment, work is performed by a combined operation of a bucket and an arm. On the other hand, in the case of hard earth and sand, excavation work is performed after the bucket and arm or boom are vibrated to loosen the earth and sand. During compaction work, buckets are used to compact soil scattered on roads.

However, in the case of flat ground, it is possible to apply a constant vibration to the boom, arm, and baguette of the work machine.However, in the case of sloping ground or uneven ground, Similarly, there is a problem that vibration cannot be given sufficiently. Also, when performing work by vibrating the work machine, the entire work machine is vibrated, but the vibration from the boom is transmitted to the upper revolving structure, and the riding comfort is degraded. In addition, there is a problem that the working machine cracks due to the vibration.

As described above, there is a need for a hydraulic excavator work equipment vibrating device that can perform civil engineering work according to various soil types and topography. Disclosure of the invention

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and is directed to a hydraulic excavator that efficiently performs vibration work such as excavation work and compaction work in civil works according to various types of soil and terrain. An object of the present invention is to provide a working machine vibration device.

A working machine vibration device for a hydraulic shovel according to the present invention includes: an actuator driving hydraulic pressure source; a plurality of working machine driving devices driven by pressure oil from the hydraulic source; A working machine having a boom, an arm, and a bucket, wherein at least one of the working machines is used or at least one of the working machines is used to vibrate the working machine. ,

A rotary vibration valve that continuously switches and discharges pressure oil from a hydraulic source,

A swing mode switching valve having two positions, a position for continuously discharging the discharged oil switched by the rotary vibration valve in one direction, and a position for discharging the switched oil alternately. ,

It is characterized in that the oil discharged from the vibration mode switching valve is supplied to the work equipment for one night or the vibration for the work equipment.

A first directional switching valve that switches pressure oil from a hydraulic pressure source and supplies the vibration oil to the vibration actuator via a rotary vibration valve and a vibration mode switching valve;

Suguro connecting the hydraulic power source and the work equipment factory

A second directional control valve may be provided in the strait to switch at least one lined oil of the work equipment for the work equipment by a pilot valve.

A first directional switching valve that switches pressure oil from a hydraulic pressure source and supplies it to at least one of the working machine actuators via a rotary vibration valve and a vibration mode switching valve; A second pipe, which is connected to at least one other part of the work equipment factory, and is connected to at least one other pipe and switches oil supply to at least one other by a pie port valve. A direction switching valve may be provided.

At least one of the working equipment switches controlled by the first directional switching valve may be a bucket working part (9). The switching of the first direction switching valve may be performed by a signal from the vibration mode switching operation unit.

A hydraulic motor for driving the rotary vibration valve;

A hydraulic motor O N Z O F F switching valve for controlling the supply of pressure oil from a hydraulic source,

A flow S adjusting valve for adjusting the flow from the hydraulic motor ONZOFF switching valve (12) is provided,

The hydraulic motor may be rotated by the flow rate adjusted from the flow rate adjustment valve, and the vibration frequency of the rotary vibration valve may be controlled according to the rotation speed of the hydraulic motor.

The work equipment work that is refueled by the second directional control valve is the boom work.

Connect the inflow side of the accumulator switching valve to the pipe between the second directional switching valve and the boom actuator, and connect the accumulator to the discharge side of the accumulator switching valve. The second direction switching valve and the switching valve for the accumulator may be switched by a pilot pressure signal from a pilot valve or an electric signal from an electric vibration mode switching operation unit.

In addition, a pressure switch for detecting the pressure of the work equipment actuator is provided, and based on the detected pressure, when at least one of the work equipment actuators is in a driving state, the vibration is switched to the vibration actuator. Pressurized oil may be supplied.

With this configuration, the rolling mode in which the work equipment work or the vibration work equipment is reciprocally vibrated, or the excavation mode in which the vibrator is vibrated in one direction can be arbitrarily selected. As a result, in the case of hard excavation work such as civil engineering work, the excavation work is facilitated by vibrating any one of the bucket, the arm and the boom to dislodge the earth and sand. In addition, compaction becomes easy even on sloping ground or uneven terrain, and rolling compaction work becomes easy. In addition, even if the ground level is lowered during the vibration work, it is possible to prevent the blanking by working in the excavation mode that vibrates in one direction. In this way, it is possible to apply vibration according to various types of soil, topography, etc., and workability is improved.

In addition, the accumulator suppresses the vibrations that occur during the operation of the work equipment, thereby improving the stability and reliability of the hydraulic excavator. Further, by detecting the pressure of the work equipment work overnight, the work equipment work is automatically vibrated in conjunction with the vibration work work while the work equipment work is being driven, improving workability.

BRIEF DESCRIPTION OF THE FIGURES

FIGS. 1A and 1B are diagrams of a hydraulic excavator to which the working machine vibration device according to the present invention is applied. FIG. 1A is a side view at the time of compaction work, and FIG. 1B is a side view at the time of excavation work. FIG. 2 is a hydraulic circuit diagram of the working machine vibration device according to the first embodiment of the present invention,

FIG. 3 is an explanatory view of a cross section of the rotary vibration valve and the vibration mode switching valve according to the first embodiment in a neutral state. FIGS. 4A and 4B are views of the compaction mode in the rolling mode according to the first embodiment when the actuator is temporarily reduced, and FIG. 4A is an explanatory view of a cross section of the rotary vibration valve and the vibration mode switching valve. , Figure 4B is the hydraulic circuit diagram,

FIGS. 5A and 5B are diagrams of the compaction mode according to the first embodiment when the actuator is extended, and FIG. 5A is an explanatory view of a cross section of the rotary vibration valve and the vibration mode switching valve. , Figure 5B is the hydraulic circuit diagram,

6A and 6B are diagrams showing a stopped state of the excavation mode according to the first embodiment. FIG. 6A is an explanatory view of a cross section of a rotary vibration valve and a vibration mode switching valve. FIG. 7A and FIG. 7B are diagrams showing an operation state in the excavation mode according to the first embodiment, and FIG. 7A is an explanatory view of a cross section of the rotary vibration valve and the vibration mode switching valve. , Figure 7B is the hydraulic circuit diagram,

8A, 8B, and 8C are diagrams in which a throttle is provided in the vibration mode switching valve of FIG. 6B, and FIG. 8A is a cross-sectional view of the rotary vibration valve and the vibration mode switching valve. Figure, Figure 8B is a detailed view of the part P in Figure 8A, Figure 8C is the hydraulic circuit diagram,

9A, 9B, and 9C are diagrams showing a working machine vibration device according to a second embodiment of the present invention. FIG. 9A is a side view of a main part of the working machine, and FIG. Fig. 9C is the hydraulic circuit diagram for the work equipment, and Fig. 9C is the hydraulic circuit diagram for the work equipment.

FIG. 10 is a hydraulic circuit diagram of the working machine vibration concealment according to the third embodiment of the present invention,

FIG. 11 is a hydraulic circuit diagram of a working machine vibration device according to a fourth embodiment of the present invention,

FIG. 12 is a hydraulic circuit diagram of a working machine vibration device according to a fifth embodiment of the present invention,

FIG. 13 is a hydraulic circuit diagram of a working machine vibration device according to a sixth embodiment of the present invention,

FIG. 14 is a hydraulic circuit diagram of a working machine vibration device according to a seventh embodiment of the present invention,

FIG. 15 is a hydraulic circuit diagram of a working machine vibration device according to an eighth embodiment of the present invention,

FIG. 16 is an explanatory view of a working machine vibration device according to a conventional technique. BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the hydraulic shovel working machine vibration device according to the present invention will be described in detail below with reference to the accompanying drawings.

1A and 1B show a hydraulic excavator 1 as an application example of the present invention, which can travel freely by a lower traveling body 2 driven by a traveling motor (not shown). On the lower traveling body 2, an upper revolving body 3 that can be rotated by driving a revolving motor is provided, and the upper revolving body 3 is equipped with a work implement 1a. The work machine 1a includes a boom 4, an arm 6, a bucket 8, a plurality of hydraulic actuators 5, 7, 9, a tilt lever 9h, and a link 9j.

The boom 4 that can be moved up and down by driving the boom actuator 5 has a arm 6 at the tip. The arm 6 is swingable up and down by driving an arm actuator 7, and a bucket 8 is attached to a tip end. Also, one end of the baggage actuator 9 is connected to one end of the tilt lever 9h, the other end of the tilt lever 9h is connected to the arm 6, and the tilt lever 9h is connected to the baggage holder. It is connected to bucket 8 via link 9j. As a result, the bucket 8 becomes rotatable by driving the bucket actuator 9.

From the above, at least one of the pistons of each work equipment for work equipment 5, 7, and 9 was reciprocated or unidirectionally vibrated to excavate while loosening the earth or to remove the earth and sand. Rolling work while compacting is possible. In the following, when at least one of the work machines for work equipment 5, 7, and 9 is indicated, it is referred to as work equipment A.

Next, a first embodiment of the present invention will be described in detail.

In FIG. 2, a hydraulic source 10 (10 a) (hereinafter referred to as a hydraulic source 10 a) for driving the actuator is connected to the first directional control valve 11. 1-way directional control valve 11 1 Force <, connected to rotary vibration valve 15 via lines 18a and 18b, and vibration mode switching valve 17 downstream of rotary vibration valve 15 It is arranged. The vibration mode switching valve 17 is connected to each of the bottom oil chambers 5 a, 7 a, and 9 a of the factory A through a line 18 e. In addition, the vibration mode switching valve 17 is connected to each of the actuators A by piping 18 d. Oil chamber 5 b, 7 b. Connected to 9 b. Hereinafter, when referring to at least one of the bottom oil chambers 5a, 7a, 9a and the head oil chambers 5b, 7b, 9b, the bottom oil chamber 5 A and head oil chamber 5B. Although one hydraulic control system is illustrated and described for the factory A, each of the work equipments 5, 7, and 9 can be individually operated and controlled. This example will be described in a seventh embodiment.

The second directional control valve 13 connected to the hydraulic pressure source 10 (10b) (hereinafter referred to as the hydraulic pressure source 10b) is connected to the pipeline 18e via the pipeline 19a, It is connected to pipeline 18d via pipeline 19b. The hydraulic motor ONZO FF switching valve 12 (hereinafter referred to as the motor switching valve 12) connected to the hydraulic pressure source 10 (10c) (hereinafter referred to as the hydraulic pressure source 10c) is connected to the line 12b. Connected to flow control valve 16. The hydraulic motor 14 connected to the flow control valve 16 via the conduit 12 d enables the rotary vibration valve 15 to rotate. 1 2c is a return line. The hydraulic sources 10 are illustrated and described as hydraulic sources 10a, 10b, and 10c for the sake of simplicity. However, the number of the hydraulic sources 10 may be one or more as necessary. 10 is used.

The pilot operation circuit according to the present embodiment will be described. The hydraulic pressure source 20 for the pilot and the operating member 21c of the vibration mode switching operating section 2.1 are in contact with the pilot valve 21A (21a, 21b). No ,. The pilot valve 21a is connected to the operating portion 11a of the first directional control valve 11 via a pilot line 22 and a branch line 22a. The pilot valve 21 b is connected to the operating section 11 b of the first directional control valve 11 via a pilot pipe 23 and a branch pipe 23 a.

The two pilot lines 22 and 23 are respectively connected to the operation units 17 a 17 b of the vibration mode switching valve 17. The shuttle valve 25 disposed between the branch pipes 22 b and 23 b of the two pilot pipes 22 and 23 is connected to the motor switching valve 12 by the pilot pipe 24. Connected to operation unit 1 2 a.

The pilot valve 24 A (24 a. 24 b) provided on the operation lever 26 is connected to the hydraulic port 10 for the pilot port. Pilot valve 24 Pilot line from 4a 28 a is connected to the operation unit 13 a of the second directional control valve 13. Further, a pilot line 28 b from the pilot valve 24 b is connected to the operation unit 13 b of the second directional switching valve 13. 27 is a tank.

In FIG. 3, the drive shaft 14a of the hydraulic motor 14 is connected to the rotor 15h of the rotary vibration valve 15 by a spline 14b. A plurality of passage holes 15a to 15d (see FIGS. 4A and 5A) are formed on the outer periphery of the rotor 15h. This drawing shows a state in which the pilot pressure is not acting on the first directional switching valve 11 and the vibration mode switching valve 17, and the spool 17 g of the vibration mode switching valve 17 is in the neutral position It is in. When the spool 17 g is in the neutral position, the passages 17 i, 17 j, 17 k and the passages 17 d, 17 e, and 17 f of the vibration mode switching valve 17 are closed. . The first directional control valve 11 is connected to the passage 15a of the rotary vibration valve 15 by a pipe 18a. Since the hydraulic motor 14 is not driven, Actuyue A is stopped.

4A and 4B show a state where the hydraulic motor 14 is driven, and the rotary vibration valve 15 is at the position b. At this time, the vibration mode switching valve 17 and the first directional switching valve 11 are both switched to the position b by the pilot pressure acting on the operation units 17b and 11b. When both are at position b, passage 15a and passage 15b are in communication. The passage 15 b communicates with the passages 17 j and 17 e of the vibration mode switching valve 17. The passage 17e is connected to the head oil chamber 5B via a line 18d. The pipeline 18 e connected to the bottom oil chamber 5 A is sequentially communicated with the passages 17 d, 17 i, 15 c, 17 k, and 17 f via the pipeline 18 a. To tank 27.

FIGS. 5A and 5B show the case where the rotary vibration valve 15 is at the position a, and the rotary vibration valve 15 is sequentially connected to the passages 15a, 15d, 17i, and 17d. And the bottom oil chamber 5A via a pipe 18e. Head oil chamber 5B is connected to tank 27 via line 18d, passages 17e, 17j, 17k, 17f and line 18a. Figures 6A and 6B show when the rotary vibration valve 15 is in the a position.Even if both the first directional switching valve 11 and the vibration mode switching valve 17 are switched to the a position, Rotary vibration valve 1 The passages 15a and 15b of No. 5 do not communicate with the passages 17e to 17f of the vibration mode switching valve 1 弁.

FIGS.7A and 7B show the case where the rotary vibration valve 15 is at the position b, and the first direction switching valve 11 and the vibration mode switching valve 17 are both switched to the position a. The type vibration valve 15 is sequentially connected to the bottom oil chamber 5A via passages 15a, 15d, 17i, 17d and a pipe 18e. The head oil chamber 5B is sequentially connected to the tank 27 via the pipeline 18d, the pipelines 17e and 17f, and the pipeline 18b.

The operation according to the configuration of the first embodiment will be described.

According to the configuration of FIG. 2, when working in the excavation mode by applying vibration to the work implement 1 a, the operation member 21 c of the vibration mode switching operation unit 21 is operated to the excavation side, so that Both the one-way switching valve 11 and the vibration mode switching valve 17 switch to the a position. Motor switching valve 12 also switches to position a, and hydraulic oil from hydraulic source 10 C flows into hydraulic motor 14 via flow control valve 16, and rotation of hydraulic motor 14 starts. I do. The rotation speed of the hydraulic motor 14 is increased or decreased by the opening degree of the flow S adjusting valve 16 and can be adjusted by control means (not shown).

The rotary vibration valve 15 is alternately and continuously switched to the position a and the position b at a vibration frequency corresponding to the rotation speed of the hydraulic motor 14. Therefore, the pressure oil from the hydraulic pressure source 10a is intermittently discharged from the rotary valve 15 through the line 18a from the position a of the first directional control valve 11 and the vibration mode switching valve. It is intermittently supplied from the a position 17 to the bottom oil chamber 5A of the actuator A through the line 18e. On the other hand, the oil in the head oil chamber 5B is drained to the tank 27 via the pipes 18d and 18b.

Because of this, Actuyue A generates one-way vibration, and it becomes possible to excavate easily by applying vibration to the hard soil.

On the other hand, when performing work in the compaction mode by applying vibration to the work equipment 1a, the operating member 21c of the vibration mode switching valve 21 is operated to the compaction side so that the first directional control valve 1 1 and the vibration mode switching valve 17 both switch to position b. The motor switching valve 12 also switches to the position a, and, similarly to the above, the hydraulic motor 14 is driven by the hydraulic oil from the hydraulic pressure source 10a. Start rotation. At a vibration frequency corresponding to the rotation speed of the hydraulic motor 14, the rotary vibration valve 15 is operated continuously by switching between the a position and the b position alternately.

In a state where the rotary vibration valve 15 is operated alternately and continuously at the positions a and b, the position b of the vibration mode switching valve 17 is three ports. Thus, the pressure oil from the hydraulic pressure source 10a is supplied to the head oil chamber 5B via the pipes 18b, 18c, 18d and the pipe 18b. It is continuously switched to pressurized oil supplied to the bottom oil chamber 5A via 18c and 18e to make lined oil. By this switching refueling, each piston of the actuator A generates a reciprocating vibration, and it is possible to easily perform the compaction by vibrating the soil and compacting.

By operating the operation lever 26 in the direction of the arrow 26 A to extend or contract the actuator A, the hydraulic oil from the pilot hydraulic power source 20 is supplied with the pilot valve. Acts on 24 a or 24 b to the operation section 13 a or 13 b of the second directional control valve 13. As a result, the second directional control valve 13 is switched from the neutral position n to the a position or the b position, so that the hydraulic oil A discharged from the second directional control valve 13 can drive the actuator A. Becomes That is, by operating the operation lever 26, normal driving with the actuator A is possible.

Therefore, by operating the vibration mode switching operation section 21 to the excavation side or the compaction side, the actuator A can vibrate in the excavation mode or the compaction mode. In addition, since the actuator A expands and contracts by the operation lever 26, normal work with the hydraulic excavator using the actuator A can be performed.

The operation details of the compaction mode will be described. In FIG. 4A, as described above, since the hydraulic motor 14 is in the driving state and the passages 15a and 15b are in communication, the hydraulic oil from the hydraulic pressure source 10a passes through the passage 1 5b, 17i, 17e, and the pipeline 18d, flow into the head oil chamber 5B, and reduce the size of Akuchiue A. Subsequently, the rotation of the hydraulic motor 14 switches the rotary vibration valve 15 from the position b to the position a as shown in FIG. 5A, so that the hydraulic oil from the hydraulic source 10 a It flows into the bottom oil chamber 5 mm through 15 a, 15 d, 17 a, 17 d, and the pipeline 18 e, and the actuator A is extended. Therefore, When the rotary vibration valve 15 is alternately switched between the a position and the b position, the actuator A repeatedly expands and contracts (reciprocates) to generate vibration in the rolling mode.

The details of the operation of the excavation mode will be described. In FIG. 6A, as described above, since the rotary vibration valve 15 is at the position a, the pressure oil from the hydraulic pressure source 10 a is blocked by the vibration mode switching valve 17. Therefore, the pressurized oil does not flow into the factory A, that is, the excavation mode is stopped. When the rotary vibration valve 15 is switched to the position b from this state, as shown in FIG. 7A, the pressure oil from the hydraulic pressure source 10a passes through the passages 15a, 15d, 17i, It flows into the bottom oil chamber 5 A through 17 d and the pipeline 18 e, and the length of the water A is extended. Therefore, when the rotary vibration valve 15 is alternately switched between the position a and the position b, the actuator A is extended (one direction), so that the vibration in the excavation mode can be generated.

FIGS. 8A, 8B and 8C show the case where a throttle 17 h is provided on the spool 17 g of the vibration mode switching valve 17. The bottom oil chamber 5A is sequentially connected via line 18e, passages 17d, 15c, 17k, throttle 17h, passages 17e, 17f, and line 18b. To tank 27.

With this configuration, when Actuate A is stopped, pressurized oil flows to passage 17k, throttle 17h, passages 17e and 17f, pipeline 18b, and bottom oil chamber 5A. A part of this pressurized oil is drained from the passage 18b to the tank 27 through the throttle 17h. This drain reduces the hydraulic pressure in the bottom oil chamber 5A, etc., and reduces the external load applied to the actuator A (for example, the load applied to the bagg 8 during vibration excavation), shortening the actuator A. However, it is possible to correct excessive extension of the factor A.

Next, a second embodiment of the present invention will be described. 9A, 9B and 9C, the work machine 1a is provided with a vibration actuator 30 instead of the baguette link 9j shown in FIG. 1A. . The vibration actuator 30 is connected to the vibration mode switching valve 17, and the actuator A is used to drive the hydraulic excavator 1 for normal work. With this configuration, the vibration actuator 30 applies vibration while applying vibration. Drilling and compaction work can be performed with Actuator A. In this embodiment, one end of the vibration actuator 30 has one end connected to the tilt lever 9h and the other end connected to the baggage 8, but the connection position is not limited.

A third embodiment of the present invention will be described. In this embodiment, an electric system is used instead of the hydraulic system of the first embodiment.

In FIG. 10, the first solenoid-operated directional control valve 32 for controlling the flow rate of the pressure oil from the hydraulic pressure source 31a is connected to the rotary vibration valve 35 and the electromagnetic vibration mode via the conduit 41a. Valve 3

6 as well as to the electromagnetic vibration mode switching valve 36 via the line 41b. Pressure oil from the electromagnetic vibration mode switching valve 36 flows into the bottom oil chamber 5A via the line 41e and into the head oil chamber 5B via the line 41d. I do. The second solenoid-operated directional control valve 33 for controlling the flow rate of the pressure oil from the hydraulic pressure source 31b is connected to the line 41e via the line 42a and to the line 41e via the line 42b. 4 1d, connected.

The electric circuit will be described. Drilling mode switch 45a and electric compaction mode switch 45b of electric vibration mode switching operation section 45, lever angle sensor 38 that detects the operation angle of electric lever 37, and The operation box 39 for the electric motor is connected to the controller 40 so that signals can be input. When the excavation mode switch 45 a is set to 0 N, the operation unit 3 of the first solenoid-operated directional control valve 32 is controlled via the controller 40.

A signal is output to 2a and the operation unit 36a of the electromagnetic vibration mode switching valve 36. Also, when the compression mode switch 45b is turned on, the operation section 32b of the first electromagnetic directional switching valve 32 and the electromagnetic vibration mode switching valve 36 are turned on via the controller 40. Operation unit

3 Output the signal to 6b.

When the electric lever 37 is set to the actuator extension side indicated by the arrow, the controller

A signal is output to the operating section 33 a of the second electromagnetic directional switching valve 33 via 40. On the other hand, when the electric lever 37 is set to the actuator reducing side, a signal is output to the operation section 33 b of the second electromagnetic directional switching valve 33 via the controller 40. The signal output from the vibration frequency control operation means 39 a and 39 b of the electric motor overnight operation box 39 controls the number of rotations of the electric motor 34 via the controller 40. are doing. A rotary vibration valve 35 is connected to the electric motor 34. With this configuration, when performing work in the excavation mode by applying vibration to the work equipment 1a, the excavation mode switch 45a is turned on and the vibration frequency control operation means 39a or 39b is operated. I do. As a result, the rotary vibration valve 35 is alternately and continuously switched to the position a and the position b at a frequency corresponding to the rotation speed of the electric motor 34. In response to this switching, the pressure oil from the hydraulic pressure source 31a intermittently flows from the rotary vibration valve 35 through the a position of the first electromagnetic directional switching valve 32 and the line 41a. Is discharged. This discharge oil is intermittently supplied to the bottom oil chamber 5A from the position a of the electromagnetic vibration mode switching valve 36 through the conduit 41e. At this time, the oil in the head oil chamber 5B is drained to the tank 41 through the pipelines 41 d and 4 lb. As a result, Actuyue A can generate vibrations in one direction, and vibrate the hard soil to facilitate excavation.

Also, when performing work in the compaction mode by applying vibration to the work equipment 1a, set the excavation mode switch 45b to ON and operate the vibration frequency control operation means 39a or 39b. . As a result, the rotary vibration valve 35 is alternately switched between the position a and the position b, and the pressure oil from the hydraulic pressure source 31 a is supplied from the position b of the first electromagnetic directional switching valve 32 to the line 4. It is intermittently discharged from the rotary vibration valve 35 through 1b. Since the b position of the electromagnetic vibration mode switching valve 36 is 3 ports, the pressure oil from the hydraulic power source 31a is supplied from the lines 41b, 41c, 41d to the head oil. The pressure oil supplied to the chamber 5B or the pressure oil supplied to the bottom oil chamber 5A from the pipelines 41b, 41c, 41e is continuously switched. As a result, the piston of the actuator A generates a reciprocating vibration, and the rolling operation can be easily performed as in the above embodiment.

By operating the electric lever 37 to the extension side of the actuator, the signal from the controller 40 is operated according to the signal from the lever inclination angle sensor 38 to operate the second electromagnetic directional control valve 33. Output to part 3 3a. On the other hand, when the electric lever 37 is operated to the reduction side, the signal is output to the operation unit 33b. As a result, the second solenoid-operated directional control valve 33 is switched from the neutral position n to the position a or b. Therefore, the pressure oil to be discharged is supplied to the bottom oil chamber 5A via the pipes 42a and 41e or the head oil chamber 5 via the pipes 42b and 41d. Supplied to B. Therefore, by setting the electric lever 37 to the extension side or the contraction side, the actuator A is driven, and normal work such as excavation is performed.

Next, a fourth embodiment of the present invention will be described. In the present embodiment, the vibration generation and the normal work are enabled in the actuator A in the third embodiment, whereas the actuator A for the vibration and the actuator A for the working machine are separately provided. It is an example to prepare for.

In FIG. 11, the electromagnetic vibration mode switching valve 36 is connected to the bottom oil chamber 30a of the vibration actuator 30 by a pipe 41e and vibrated by a pipe 41d. It is connected to the head oil chamber 3 Ob at 30 hours. The vibration actuator 30 is arranged in the same way as in Fig. 9A. The second solenoid-operated directional control valve 33 is connected to the bottom oil chamber 5A of the factory A via the pipe 42a, and the head oil chamber of the factory A is used by the pipe 42b. 5 Connected to B.

With this configuration, the excavation or compaction work can be performed by driving the actuator A while applying vibration with the vibration actuator 30.

A fifth embodiment of the present invention will be described. This embodiment is an example in which an accumulator is continuously connected to the hydraulic circuit of the boom actuator in FIG. 9C of the second embodiment. The directional control valve 13 is connected to the bottom oil chamber 5a of the boom actuator 5 by the pipe 19a and the head oil chamber 5 of the boiler actuator 5 by the pipe 19b. b and are connected respectively. The branch pipe 19 c connected to the pipe 19 b connects the switching valve 29 for the accumulator. A throttle 29 b and an accumulator 29 c are provided downstream of the accumulator switching valve 29. The operation part 29 a of the switching valve 29 for the accumulator is connected to the shuttle valve 25 by a branch line 24 a.

With such a configuration, when a pressure fluctuation occurs in the pipeline 19b connected to the head oil chamber 5b, the oil in the head oil chamber 5b flows into the accumulator 29c and the accumulator 29b. The vibration energy is absorbed by the panel action of 29 c and the damping action due to the pressure loss of the throttle 29 b. Thereby, the vibration of the boom actuator 5 is suppressed. The switching valve 29 for the accumulator, the throttle 29b and the accumulator 29c are connected to the pipe 19a so as to suppress the vibration caused by the pressure fluctuation in the bottom oil chamber 5a. May be.

A sixth embodiment of the present invention will be described. This embodiment is an example in which an accumulator is connected to the hydraulic circuit for the boom actuator in FIG. 11 of the fourth embodiment. (2) The solenoid-operated directional control valve 33 is connected to the bottom oil chamber 5a of the boom actuator 5 by a pipe 42a, and the head of the boom actuator 5 is connected by a pipe 42b. Connected to oil chamber 5b. The branch line 42c connected to the line 42b is provided with an accumulator switching valve 43, a throttle 43b, and an accumulator 43c in the same manner as in the case of Fig. 12. . The signal of the excavation mode switch 45a or the compaction mode switch 45b is input from the controller 40 to the operation unit 43a of the changeover valve 43 for accumulation.

With this configuration, when a pressure fluctuation occurs in the pipeline 42b connected to the head oil chamber 5b, the oil in the head oil chamber 5b flows into the accumulator 43c, and the fifth embodiment By the same action as in the example, the vibration energy is absorbed, and the vibration of the boom actuator 5 is suppressed. The accumulator switching valve 43, the throttle 43b, and the accumulator 43c may be connected to the pipeline 42.

A seventh embodiment of the present invention will be described. The present embodiment is an example in which the actuator A is individually controlled and a vibration actuator is provided, in contrast to the third embodiment.

In FIG. 14, the boom directional control valve 13 c connected to the hydraulic pressure source 10 b is connected to the bottom oil chamber 5 a of the boom actuator 5 by a line 18 el, and is connected to the line 1. It is connected to the head oil chamber 5 b by 8 dl. The pressure detection pipe 53 a connected to the pipe 18 dl is connected to the pressure switch 53. Also, connect to the hydraulic pressure source 10b. The arm directional switching valve 13 d is connected to the bottom oil chamber 7 a of the arm actuator 7 through line 18 e2 and to the head oil chamber 7 b through line 18 d. are doing. Line 18 d2 The pressure detecting line 54 a to be connected connects the pressure switch 54.

In addition, the baguette directional control valve 13 e connected to the hydraulic pressure source 1 O b is connected to the bottom oil chamber 9 a of the baggage actuator 9 via a line 18 e3, Road 1

Connected to head oil chamber 9 b by 8 d3. Pressure line connected to line 18 e3

55 a is connected to the pressure switch 55. The boom, arm, and bucket directional switching valves 13c, 13d, and 13e are the second directional switching valves shown in FIG.

Same parts as 13

Each signal from the pressure switch 53, 54, 55 is input to the controller 60, and a signal corresponding to each signal is output from the controller 60 to the proportional solenoid valve 61. Is done. The proportional solenoid-operated directional control valve 61 connected to the hydraulic pressure source 56 is connected to the pilot line 6

It is connected to the operating part 62 a of the directional switching valve 62 for vibration via 1 a and the branch pipe 61 b. Further, the pilot line 61 a is connected to the motor switching valve via the branch line 61 c.

It is connected to the operation unit 12 a of 12 and to the vibration mode switching valve 63. The hydraulic motor 14, the rotary vibration valve 15 and the vibration mode switching valve 17 are provided for each of the factories 5, 7, and 9, respectively.

With this configuration, the pressure switches 53, 54, and 55 are connected to the boom lowering pressure of the boom actuator 5, the digging pressure of the arm actuator 7, and the bucket actuator 9 Detects tilt pressure. When it is detected that at least one drive pressure has been generated among the actuators A, one of the vibration directional switching valve 62, the mode switching valve 12 and the vibration mode switching valve 6 3 The pressure oil is automatically supplied to the bottom oil chamber 30a of the vibration actuator 30 by switching to the position a, thereby enabling one-way excavation vibration. Accordingly, during each operation by the work machine 1a, the vibration actuator 30 automatically generates vibration, thereby improving workability.

Next, an eighth embodiment of the present invention will be described. In this embodiment, the This is an example in which the electric control of the third embodiment is applied to the seventh embodiment (refer to FIG. 14) of a hydraulic system which individually controls the vibration factor and the vibration actuator.

In Fig. 15, each of the boom, arm and bucket solenoid directional control valves 33-1, 33-2, 33-3 (the same parts as the second solenoid directional control valve 33) These are connected to the bottom oil chambers 5a, 7a, and 9a, respectively, via lines 41el, 41e2, and 41e3. In addition, each of the solenoid directional valves 33-1, 33-2, 33-3 is connected to a head oil chamber 5b via a line 41dl, 41d2, 41d3, respectively. , 7 b, 9 b fet L contact.

Further, the pressure detection lines 53a, 54a, 55a, which are connected to the lines 41dl, 41d2, 41d3, respectively, are connected to the pressure switches 53, 54, 55, respectively. ing. The controller 60 connected to the pressure switches 53, 54, 55 is connected to the electromagnetic directional switching valve 81 for vibration, the electromagnetic vibration mode switching valve 82, and the electric motor 34. There. The rotary vibration valve 35, the electromagnetic vibration mode switching valve 36, and the like are provided for each of the factories 5, 7, and 9, respectively.

With this configuration, the pressure switches 53, 54, and 55 respectively provide the boom lowering side pressure of the boom actuator 5, the excavation side pressure of the arm actuator 7, and the tilt of the bucket actuator 9, respectively. Pressure is being detected. When at least one drive pressure is input to the controller 60 by detection, the electromagnetic directional switching valve 8 1 for vibration is switched from the closed position c to the open position a and the electromagnetic vibration mode Switching valve 8 2 forces to switch from closed position c to open position a. By these switching, the pressure oil from the hydraulic pressure source 31a is automatically supplied to the vibration actuator 30 to excavate and vibrate. Industrial applicability

The present invention provides a working machine vibration device for a hydraulic shovel that can easily perform excavating work and compacting work by arbitrarily selecting a compacting mode or a excavating mode of a working machine, thereby improving workability. Useful. Also, when the ground position goes down during vibration work, In addition, safety is improved by preventing idle hits. Furthermore, since the vibration can be suppressed by the accumulator, riding comfort is good. While the work equipment work is being driven, the vibration work is automatically vibrated in conjunction with the work equipment, improving workability.

Claims

The scope of the claims

1. A working machine having a hydraulic source for driving an actuator, a plurality of working and / or vibrating working units driven by pressure oil from the hydraulic source, and a boom, arm and bucket. A working machine vibrating device of a hydraulic shovel that vibrates the working machine by at least one of the working machine working machine or the vibrating working machine.

A rotary vibration valve (15) for continuously switching and discharging the pressure oil from the hydraulic pressure source (10); and a discharge oil switched by the rotary vibration valve (15) for continuously discharging in one direction. A vibration mode switching valve (17) having two positions, a position and a position for alternately switching and discharging.

A hydraulic excavator, characterized in that oil discharged from the vibration mode switching valve (17) is supplied to the work equipment work equipment (5, 7, 9) or the vibration work equipment work (30). Work machine vibration device.

2. The working machine vibration device for a hydraulic shovel according to claim 1,

The first oil, which switches the pressure oil from the hydraulic pressure source (10) and is supplied to the vibration actuator (30) via the rotary vibration valve (15) and the vibration mode switching valve (17). Directional valve (1 1)

A pipeline connecting the hydraulic power source (10) and the working machine actuator (5, 7, 9), respectively;

A second directional control valve (13), which is disposed in the channel and switches at least one of the working machine actuators (5.7, 9) by a pilot valve (24A); It is specially provided.

3. The working machine vibration device for a hydraulic shovel according to claim 1,

By switching the pressure oil from the hydraulic pressure source (10), the rotary vibration valve (15) and the vibration mode are switched. A first directional switching valve (11) for supplying at least one of the working machine actuators (5,7.9) via a switching valve (17);

A pipe connecting the hydraulic power source (10) and at least one of the working machine actuators (5, 7, 9);

A second directional control valve (13) that is provided in the channel and that switches oil supply to at least the other one by a pilot valve (24 °).

4. The working machine vibration device for a hydraulic shovel according to claim 3,

At least one of the work implement actuators (5, 7, 9) controlled to be switched by the first directional switching valve (11) is a bucket actuator (9). You.

5. The working machine vibration device for a hydraulic shovel according to any one of claims 2 to 4,

The switching of the first direction switching valve (11) is performed by a signal from a vibration mode switching operation section (21).

6. In the working machine vibration device for a hydraulic shovel according to any one of claims 2 to 4,

A hydraulic motor (14) for driving the rotary vibration valve (15),

A hydraulic motor ON / 0 F F switching valve (12) for controlling the supply of pressure oil from the hydraulic source (10);

A flow control valve (16) for adjusting the flow from the hydraulic motor ONZO F F switching valve (12);

The hydraulic motor (14) is rotated by the adjusted flow rate from the flow control valve (16), and the vibration frequency of the rotary vibration valve (15) is changed according to the rotation speed of the hydraulic motor (14). It is characterized by being controlled.

7. The working machine vibration device for a hydraulic shovel according to claim 2 or 3, wherein the working machine operated by the second directional switching valve (13) is refueled by a switch. ) And

An inflow side of an accumulator switching valve (29) is connected to the pipe between the second directional switching valve (13) and the boom actuator (5), and the accumulator switching valve (29) is connected. Connect the accumulator (29c) to the discharge side of

The first directional switching valve (13) and the accumulator switching valve (29) are provided with a pilot pressure signal from the pilot port valve (24A) or an electric signal from an electric vibration mode switching operation unit (45). Switching is performed by a signal.

8. The working machine vibration device for a hydraulic shovel according to claim 2 or 3, further comprising: a pressure switch (53, 54. 55) for detecting a pressure of the working machine actuator (5, 7, 9). ,

Based on the detected pressure, when at least one of the working machine tools (5.7, 9) is in a driving state, a pressure oil is supplied to the vibration machine tool (30). And