KR100322372B1 - Operation means output control device of hydraulic machine - Google Patents

Abstract

The present invention relates to a device for controlling the output of a joystick and the like used in the operation of a hydraulic construction machine, including an excavator, etc., comprising: a prime mover, a hydraulic pump driven by the prime mover, a hydraulic actuator operated by the hydraulic pump and A control valve for controlling the start, stop, and direction change of the hydraulic actuator by adjusting the flow and direction of the hydraulic pump discharge oil, and applied to a hydraulic machine having a plurality of output modes, the operator's operation command for operating the hydraulic actuator. Operating means for converting and outputting the electric power into a corresponding electric quantity, valve driving means for driving a control valve so that the hydraulic actuator can be operated at a predetermined speed and direction based on the output electric quantity of the operating means, and the output electric quantity of the operating means. Operation deceleration means and command to reduce the operation Is provided with a control means for reducing the output electric quantity of the operation means at a predetermined rate according to the output mode and then outputting it to the valve drive means.

Description

Operation means output control device of hydraulic machine

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic construction machine control apparatus including an excavator and the like, and more particularly, to an apparatus for controlling the output of a joystick or the like used in the operation of these machines.

In general, in the case of construction machinery such as an excavator, the output mode is divided into multiple stages according to the working environment and the type of work. These output modes include a heavy excavation mode (H), a standard excavation mode (S), a light excavation mode (L), and a fine manipulation mode (F) according to the corresponding work.

In the case of a job that requires a large output and speed such as an ordinary excavation work, a trench digging work, a transportation work, etc., the work is performed in the medium digging mode (H). After recalibration, the power was reduced and the work was done. When the obstacles were removed, the power had to be increased to the normal digging mode (H) again, which caused considerable inconvenience and delay.

On the other hand, when fine operation is required in a high output state due to the work characteristics, since the operation operation range of the micro operation is extremely limited, considerable work proficiency is required, and there is a possibility that an accident may occur even with slight work care.

Accordingly, an object of the present invention is to provide a hydraulic machine that can be easily switched to a fine working mode even in a high power and high rotation state in a work environment in which work types and load conditions are frequently changed, and a micromanipulation operation area can be sufficiently secured. An operation means provides an output control apparatus.

SUMMARY OF THE INVENTION An object of the present invention is to provide a control means for outputting a control means of a hydraulic machine that enables the driver to respond quickly to changes in the working environment, and the risk of accidents caused by carelessness can be significantly eliminated.

The above object of the present invention is to start, stop, and control the flow and direction of the prime mover, the hydraulic pump driven by the prime mover, the hydraulic actuator operated by the hydraulic pump and the hydraulic pump discharge oil. Applied to a hydraulic machine having a control valve for controlling the change of direction and having a plurality of output modes: operating means for converting a driver's operation command for operating the hydraulic actuator into a corresponding amount of electricity; Valve driving means for driving the control valve so that the hydraulic actuator can be operated at a predetermined speed and direction based on the output electricity of the operation means; Operation reducing means for instructing to reduce the output electric quantity of the operation means; And a control means for reducing the output electric quantity of the operation means at a predetermined ratio according to the output mode when the reduction command is applied from the operation deceleration means and outputting it to the valve driving means. By providing an operating means output control apparatus of the mechanical apparatus.

The present invention having the same features as described above will be more clearly understood by preferred embodiments of the present invention which will be described below with reference to the accompanying drawings.

1 shows a schematic hydraulic-electrical circuit of a hydraulic machine to which the control device of the present invention is applied.

An engine E / G which is a prime mover, a variable volume hydraulic pump P driven by the engine E / G, and a pilot pump Pi as a source of signal pressure in the hydraulic system are provided. A plurality of hydraulic actuators A1 and A2 operated by the discharge oil of the hydraulic jump P are provided. In the circuit 1 between the hydraulic pump P and the hydraulic actuators A1 and A2, the start, stop and direction change of the hydraulic actuators A1 and A2 are controlled by adjusting the flow and direction of the hydraulic pump P discharge oil. Control valves CV1 and CV2 are installed.

On the other hand, an operation means 3 such as a joystick for receiving the driver's operation command for operating the above-mentioned hydraulic actuators A1 and A2 at a desired speed and direction, converting it into a corresponding electric quantity, and outputting the same A valve driving means (5) for driving the control valves (CV1, CV2) so that the above-described hydraulic actuators (A1, A2) can be operated at a predetermined speed and direction based on the output electricity of the operation means (3). Is provided.

Specifically, the above-described valve driving means 5 controls the pilot oil pressure from the aforementioned pilot pump Pi in proportion to the output electric quantity of the operating means 3, and controls the control valve CV1, CV2) electromagnetic proportional valve applied to both ends of the spool.

On the other hand, the output of the engine E / G and the discharge flow rate of the hydraulic pump P according to the working environment and the type of work are determined in a multi-step mode (distillation mode: H, standard digging mode: S, light digging mode: L, fine operation mode: an output mode selection means 7 composed of a conventional rotary switch or the like which is controlled to be converted to F) is provided.

The swash plate 9 and the swash plate tilt angle adjusting mechanism 11 and the pilot oil pressure of the pilot pump Pi to variably adjust the discharge flow rate of the hydraulic pump P described above are proportionally adjusted according to the applied electric quantity. The configuration of the electronic proportional variable pressure reducing valve 13 and the like applied to the swash plate tilt angle adjusting mechanism 11 may be understood by those skilled in the art without further explanation.

The signal of the above-mentioned operation means 3 and the signal of the output mode selection means 7 are inputted to output the corresponding signals to the engine E / G, the variable pressure reducing valve 13 and the valve driving means 5 and the like. The control unit 15 for controlling the entire system is provided.

The operation means output control device of the present embodiment includes operation deceleration means 17 for applying a command signal to the control unit 9 so as to reduce the output electricity amount of the operation means 3 described above, and this operation deceleration means 17 ) May be configured as a conventional kickdown button switch. In the control part 15, when the reduction instruction is applied from the operation deceleration means 17, the output electric quantity of the operation means 3 is reduced by a predetermined ratio according to the output mode selected by the output mode selection means 7 Output to the valve drive means (5).

That is, in the conventional case, as shown in FIG. 2A, regardless of the output modes H, S, L, and F, the output electric quantity v according to the operation displacement Ø of the operation means 3. In the case of the present invention, according to the output mode (H, S, L, F), even if the operation displacement (Ø) of the same operation means (3) as shown in FIG. The output electric quantity v becomes different.

In other words, when the operation reducing means 17 is turned ON, when the same operation displacement Ø1 is operated, the output electric quantity has a value of v1 in the medium digging mode H, but the fine operation mode F ) Has a value of v2, so it can be seen that the output electricity is reduced. The reduction ratio of the output electricity amount is stored in the control means 15 in advance after being set to an optimum value in consideration of working conditions and the like.

As described above, according to the present invention, in a work environment in which work types and load conditions frequently change, the micro work mode can be easily switched even in a high output and high rotation state, and the effect of ensuring a fine operation operating area is sufficient. In addition, the driver can quickly respond to changes in the working environment, and concerns about accidents caused by the carelessness can be considerably resolved.

1 is a hydraulic-electric circuit diagram of a hydraulic machine to which the control device of the present invention is applied.

2 (a) is a diagram showing the relationship between the operating means operating displacement and the output electric quantity according to the output mode in the conventional apparatus.

2 (b) is a diagram showing the relationship between the operating means operating displacement and the output electric quantity according to the output mode in the apparatus of the present invention.

* Explanation of symbols used in the main part of the drawing

-First degree-

E / G: engine

P: Hydraulic Pump

A1, A2: Hydraulic Actuator

CV1, CV2: control valve

3: operation means

5: valve driving means

7: Output mode selection means

15: control means

17: operation reduction means

-(I), (b)

H: Heavy Excavation Mode

S: Standard Excavation Mode

L: Light Excavation Mode

F: Fine operation mode

Ø: operation displacement of the control means

V: output electricity

Claims (1)

A control valve for controlling the start, stop and direction change of the prime mover, the hydraulic pump driven by the prime mover, the hydraulic actuator operated by the hydraulic pump, and the flow and direction of the hydraulic pump discharge oil. Applied to hydraulic machinery with multiple output modes: Operating means for converting and outputting a driver's operation command for operating the hydraulic actuator into an electric quantity corresponding thereto; Valve driving means for driving the control valve based on the output electricity of the operation means and allowing the hydraulic actuator to be operated at a predetermined speed and direction; Operation reducing means for instructing to reduce the output electric quantity of the operation means; And And a control means for reducing the output electric quantity of the operation means at a predetermined ratio according to the output mode and then outputting the control means to the valve driving means when a reduction command is applied from the operation deceleration means. Operation means output control device of machinery.