JP2024005170A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine whose operability can be easily changed to suit the purpose of operation without hindering workability.

SOLUTION: In a construction machine, a switch (332d1) for executing first control to increase operational responsiveness of actuators (460, 480) operated by work machine operation is attached to a pair of operating levers (332c, 332d) assigned to swing operation and the work machine operation.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to construction machinery.

The system generates control signals based on setting data related to the control characteristics of each hydraulic actuator in response to electrical operation signals from a plurality of operation devices that output electric operation signals according to the amount of operation, and controls pressure oil to the hydraulic actuators. 2. Description of the Related Art There is a known construction machine that has a control means for outputting an output to a plurality of control valves that respectively control flow, and in which setting data relating to control characteristics of each hydraulic actuator can be changed from a display device. (See Patent Document 1)

BACKGROUND ART In construction machinery, there are cases in which a bucket is caused to repeatedly perform dumping and clouding operations, thereby causing the bucket to perform an action similar to sweeping away soil. Such an operation requires that the actuator has high responsiveness to the operation. In addition, when the boom is raised and lowered, or the arm is repeatedly moved in a clouding and dumping motion, such as during compaction work or piling work during slope leveling work, the actuator is required to have high responsiveness to operations.

Japanese Patent Application Publication No. 2007-332563

Actions such as sweeping the soil out of the bucket may be performed between excavation operations. Furthermore, compaction work is performed together with leveling work, and piling work is sometimes performed together with other operations such as turning operations.

For example, as in the cited example, if the optimal settings are made for actions such as sweeping soil from a bucket, compaction work, and piling work, the work details can be displayed on the display device, such as when performing alternate work such as excavation work. If the settings are changed from the display device each time a change is made, there is also the problem that workability deteriorates. Furthermore, if excavation work is performed alternately with the optimum settings for a particular work, work efficiency will be significantly impaired.

The present invention has been made in view of the problems of the prior art described above, and its object is to provide a working machine whose operability can be easily changed to suit the purpose of operation without interfering with workability.

A construction machine that is an embodiment of the present invention includes a pair of operating levers to which swing operations and work equipment operations are assigned, and a control device that controls the operational responsiveness of an actuator operated by the work equipment operations. The operating lever is equipped with a switch that causes the control device to execute a first control that increases the operational responsiveness of the actuator.

According to the present invention, it is possible to provide a working machine whose operability can be easily changed to suit the purpose of operation without impeding workability.

1 is a perspective view of a hydraulic excavator according to an embodiment of the present invention. FIG. 1 is a perspective view of an operating lever of a hydraulic excavator according to an embodiment of the present invention. 1 is a schematic diagram of a control system for a hydraulic excavator according to an embodiment of the present invention. 3 is a graph schematically showing the relationship between the operating speed and the amount of operation of a bucket cylinder according to an embodiment of the present invention. It is a flowchart figure of the control flow of the control device of the hydraulic excavator concerning one embodiment of the present invention. FIG. 1 is a perspective view of an operating lever of a hydraulic excavator according to an embodiment of the present invention. 1 is a schematic diagram of a control system for a hydraulic excavator according to an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail with reference to the accompanying drawings, taking a hydraulic excavator 100 as a representative example of a construction machine according to the present invention. Note that the direction in which the working device 400 is disposed on the revolving upper structure 300 is defined as the front, and the opposite direction is defined as the rear.

The hydraulic excavator 100 includes a self-propelled lower traveling body 200, an upper rotating body 300 rotatably supported on the lower traveling body 200, and a working machine supported vertically rotatably in front of the upper rotating body 300. The device includes a device 400 and a control system 500.

The working device 400 includes a swing post 410 supported to be horizontally rotatable at the tip of the upper revolving structure 300, a boom 420 supported to be vertically rotatable by the swing post 410, and a tip of the boom 420. An arm 430 is mounted to be rotatable up and down, a bucket 450 is rotatably mounted to the tip of the arm 430, and a bucket 450 is installed below the upper rotating body 300 to rotate the swing post 410 in the horizontal direction. a swing cylinder (not shown); a boom cylinder 460 installed in front and below the boom 420 to move the boom 420; an arm cylinder 470 installed above the boom 420 to move the arm 430; The bucket cylinder 480 is installed at a bucket cylinder 480 and moves a bucket 450 via a bucket link 440.

The lower traveling body 200 has a center frame 210 and side frames 211a and 211b that are symmetrically paired with the center frame 210 and extend in the front and back direction, and a left travel motor ( A drive wheel 212a is installed, and a plurality of idler wheels 213a are arranged toward the front.A crawler belt 214a is wound around the drive wheel 212a and the idler wheel 213a, and a right side frame A drive wheel 212b (not shown) driven by a right travel motor (not shown) is installed at the rear end of 211b, and a plurality of idle wheels 213b (not shown) are arranged toward the front. A crawler belt 214b is wrapped around the wheel 212b and the idler wheel 213b, and an earth removal device 220 is attached to the front of the center frame 210.

The upper revolving body 300 includes a counterweight 310 installed at the rear end, a fuselage frame 320 extending forward from the counterweight 310, and a swing post 410 installed at the tip of the fuselage frame 320 between the counterweight 310. It consists of a driver's seat 330 located at the rear of the driver's seat 330, and an engine room 340 installed below a seat 331 located at the rear of the driver's seat 330.

The driver's seat 330 is formed from an operating device 332, a seat 331, and a floor material 333 that extends forward from the front wall of the engine room 340 below the seat 331 and is formed above the fuselage frame 320.

The engine room 340 includes an engine (not shown), a variable displacement pump 511 that is driven by the engine and pumps hydraulic oil to a plurality of actuators that move the hydraulic excavator 100, such as a boom cylinder 460 and an arm cylinder 470, and a floor material. 333 and controls a plurality of actuators; a control signal pressure (pilot pressure) input to the control valve 514; and a pilot pressure input to the regulator 511a that controls the flow rate of the variable displacement pump 511. A plurality of devices such as a pilot pump 512 that generates the primary pressure are arranged.

The operating device 332 can operate each actuator via the control device 520 by outputting the operating direction and amount as an electrical signal.

The operating device 332 is arranged in front of the driver's seat 330 on the left and right, and is installed upright on a left travel lever 332a and a right travel lever 332b protruding from the floor material 333, and console boxes located on the left and right sides of the seat 331. It is composed of a left operating lever 332c, a right operating lever 332d, and the like.

The left operation lever 332c and the right operation lever 332d are respectively assigned boom operation, arm operation, bucket operation, and rotation operation, and there are four types of combinations (operation patterns) of these operation assignments, and the operator can , an operation pattern can be arbitrarily selected by operating the display device 334 disposed in front of the right operation lever 332d.

As shown in FIG. 2, a left operating lever 332c and a work equipment actuator (boom cylinder 460, arm cylinder 470, and A switch 332d1 for increasing the operational response of the bucket cylinder 480) and a horn switch 332d2 for blowing the horn are installed side by side from the inside to the outside. Here, the switch mounted on the outside is a horn switch, but it may also be a switch assigned other functions.

The switch 332d1 is a momentary operation type push button switch, and since the switch 332d1 is located at the left end of the upper end of the operating lever, it does not get in the way when suddenly warning people around the construction machine with a horn. Since the switch 332d1 can be held down while operating the right operating lever 332d, when performing operations such as sweeping soil off of a bucket, compaction work, and pile driving work, the work equipment actuator can be easily adjusted in response to the operation. Responsiveness can be improved.

In the embodiment, the switch 332d1 is a momentary operation type push button switch, but is not limited to this, and may be an alternate operation type push button switch, and the mounting position is not limited to the upper end of the gripping part. It may be attached to the front part of the unit. Further, it may be attached to the left traveling lever 332a instead of the right operating lever 332d.

Next, the control system 500 of the hydraulic excavator 100 will be described using FIG. 3.

The control system 500 includes a hydraulic circuit 510, a control device 520, a switch 332d1, and a display device 334.

In the hydraulic circuit 510, a high-pressure hydraulic oil pipe extending from the variable displacement pump 511 is represented by a solid line, and a low-pressure hydraulic oil (pilot pressure) pipe extending from the pilot pump 512 is represented by a dotted line.

The hydraulic circuit 510 includes a center bypass passage 513 extending from a variable displacement pump 511 that controls the discharge flow rate by inputting pilot pressure reduced by an electromagnetic proportional valve 518 to a regulator 511a, and an oil passage extending from the center bypass passage 513. The hydraulic circuit 510 includes a control valve 514 composed of a directional switching valve that controls each actuator connected to the directional switching valve, and a hydraulic circuit 510 that controls the flow from the center bypass passage 513 to the tank 515 regardless of the sliding position of the spool of the directional switching valve. This is a so-called closed center circuit in which no path is formed, but it is not limited to this.

The control valve 514 includes a directional switching valve 514a that controls the boom cylinder 460, a directional switching valve 514b that controls the bucket cylinder 480, left and right travel motors, an arm cylinder 470, a swing motor (not shown), etc. The hydraulic circuit 510 is composed of a plurality of other directional switching valves that respectively control other actuators, and the description of the plurality of other actuators and the plurality of other directional switching valves is omitted in the hydraulic circuit 510. Further, the pilot pressure discharged from the electromagnetic proportional valve 517 controlled by the control device 520 is input to the pilot pressure input port of the directional switching valve constituting the control valve 514 .

The pilot pressure input ports 514a1 and 514a2 of the directional switching valve 514a have outputs from the electromagnetic proportional valves 517a1 and 517a2 depending on the direction and amount of operation (tilting amount) of the left operating lever 332c or the right operating lever 332d. When the pilot pressure is input, the spool of the directional control valve 514a slides, and oil according to the opening amount of the corresponding spool flows to the rod side or the bottom side of the boom cylinder 460, raising and lowering the boom 420.

The pilot pressure output from the electromagnetic proportional valves 517b1 and 517b2 is input to the pilot pressure input ports 514b1 and 514b2 of the directional switching valve 514b, depending on the direction and operation amount of the left operating lever 332c or right operating lever 332d. As a result, the spool of the directional control valve 514b slides, and oil according to the opening amount of the corresponding spool flows to the rod side or bottom side of the bucket cylinder 480, causing the bucket 450 to perform a cloud operation or a dump operation.

The arm cylinder 470 also performs a dumping operation or a clouding operation depending on the direction and amount of operation (tilting amount) of the left operating lever 332c or the right operating lever.

The rotation motor also rotates the upper rotating body 300 to the left or to the right depending on the direction and amount of operation (tilting amount) of the left operation lever 332c or the right operation lever.

The operating device 332 includes a left running lever 332a, a right running lever 332b, a left operating lever 332c, a right operating lever 332d, etc., and a signal output from the operating device 332 is input to the control device 520. .

The switch 332d1 continues to send a signal to the control device 520 while being pressed.

The control device 520 is an ECU (electronic control unit), and includes an input buffer that converts the signal level of a digital input signal, an AD converter that converts an analog input signal to digital, and a microcomputer that calculates control amounts from various input signals. The output driver converts the output signal from the microcomputer into a drive signal for driving the actuator, a communication driver, a communication receiver, and the like.

A signal input to the control device 520 is represented by a dashed-dotted line with an arrow pointing toward the control device 520, and a signal output from the control device 520 is represented by a dotted line with an arrow pointing toward the device into which the signal is input. Represented by a dashed line.

The calculation unit 521 includes a storage unit 522 and an execution processing unit 523.

The storage unit 522 stores the operation response of the operation signal output from the operation device 332 (the operation amount of the operation lever) and the signal input to the electromagnetic proportional valve 517 (the opening amount of the spool of the control valve 514, that is, the operation speed of the actuator). a discharge flow rate map of the operation signal output from the operation device 332 (the amount of operation of the operation lever) and the signal input to the electromagnetic proportional valve 518 (the discharge flow rate of the variable displacement pump 511), and the left operation lever 332c and the right A combination of the electromagnetic proportional valve 517 of the control valve 514 that controls the arm, bucket, boom, and swinging operation to which an operation signal is input in response to the operation of the operation lever 332d, that is, the left operation lever 332c and the right operation lever 332d. Information on combinations (operation patterns) of arm, bucket, boom, and rotation operations and currently set operation patterns are stored.

The operation responsiveness map stored in the storage unit 522 corresponds to the operations of the left travel lever 332a and right travel lever 332b used in normal operations, and the operations assigned to the left operation lever 332c and right operation lever 332d for each operation pattern. The set steady operation map and the actuators (boom cylinder 460, arm cylinder 470, It is composed of a speed increasing operation map that improves the operational response of the bucket cylinder 480).

The operation patterns stored in the storage unit 522 are four combinations of pattern A, pattern B, pattern C, and pattern D.

In pattern A, arm dump is assigned to the forward tilting operation of the left operating lever 332c, arm cloud is assigned to the backward tilting operation, left rotation is assigned to the leftward tilting operation, and right rotation is assigned to the rightward tilting operation. Boom lowering is assigned to the forward tilting operation of the right operating lever 332d, boom raising is assigned to the backward tilting operation, bucket cloud is assigned to the leftward tilting operation, and bucket dump is assigned to the rightward tilting operation.

In pattern B, a right turn is assigned to a forward tilting operation of the left operating lever 332c, a right turn is assigned to a backward tilting operation, an arm dump is assigned to a leftward tilting operation, and an arm cloud is assigned to a rightward tilting operation. Boom lowering is assigned to the forward tilting operation of the right operating lever 332d, boom raising is assigned to the backward tilting operation, arm cloud is assigned to the leftward tilting operation, and arm dump is assigned to the rightward tilting operation.

In pattern C, the forward tilting operation of the left control lever 332c is assigned to lower the boom, the backward tilting operation is assigned to the boom up, the leftward tilting operation is assigned to bucket dump, and the rightward tilting operation is assigned to the bucket arm. Arm dump is assigned to the forward tilting operation of the right operating lever 332d, arm cloud is assigned to the backward tilting operation, left turn is assigned to the leftward tilting operation, and right turn is assigned to the rightward tilting operation.

In pattern D, the forward tilting operation of the left operating lever 332c is assigned to lower the boom, the backward tilting operation is assigned to the boom up, the leftward tilting operation is assigned to a bucket dump, and the rightward tilting operation is assigned to a bucket arm. Arm cloud is assigned to the forward tilting operation of the right operating lever 332d, arm dump is assigned to the backward tilting operation, left turn is assigned to the leftward tilting operation, and right turn is assigned to the rightward tilting operation.

The execution processing unit 523 refers to the operation pattern and operation responsiveness map stored in the storage unit 522 from the operation signal transmitted to the operation of the operation device 332, and causes the electromagnetic proportional valve 517 of the control valve 514 to output a signal. Move the actuator.

For example, when the A pattern is set and the right operation lever 332d is tilted to the left or right, the execution processing unit 523 refers to the steady operation map and moves the bucket cylinder 480 to repeatedly perform cloud and dump operations on the bucket. let

Furthermore, when the right operation lever 332d is tilted left and right while pressing the switch 332d1, the execution processing unit 523 moves the bucket cylinder 480 with reference to the speed increase operation map and causes the bucket 450 to repeatedly perform cloud and dump operations.

FIG. 4 compares the relationship between the operation amount and the operating speed of the bucket cylinder 480 based on the steady operation map and the speed-up operation map. High speed rise and high operational responsiveness of the actuator. It can be said that the bucket operation based on the control according to the present invention is suitable for operations such as sweeping soil from the bucket.

Furthermore, when the right operation lever 332d is tilted forward or backward while pressing down the switch 332d1, the execution processing unit 523 moves the boom cylinder 460 with reference to the speed increase operation map and moves the boom cylinder 460 against the boom 420 without pressing down the switch 332d1. It is possible to repeatedly perform up and down movements at a higher speed than the previous operation. In other words, the control according to the present invention can be said to be suitable for pile driving and compaction operations.

Furthermore, when the left operation lever 332c is tilted forward or backward while pressing down the switch 332d1, the execution processing unit 523 moves the arm cylinder 470 with reference to the speed increase operation map, without pressing the switch 332d1 against the arm 430. The cloud operation and dump operation can be repeatedly performed at a higher speed than the previous operation. That is, the control according to the present invention can be said to be suitable for leveling work during rolling operation.

The control flow will be explained using FIG. 5. FIG. 5 is a flowchart relating to the control method.

Keep pressing the switch 332d1 with your finger while the A pattern is set. (S1) Tilt the right operating lever 332d to the left. (S2) The bucket performs cloud operation based on the speed increase map. (S3)

Tilt the right operating lever 332d to the right. (S4) The bucket performs a dump operation based on the speed increase map. (S5)

When the finger is released from the switch 332d1 (S6: YES), the soil removal operation of the bucket is ended.

If the switch 332d1 is continued to be pressed with a finger (S6: NO), the processes of S2 to S6 are repeatedly executed, and the soil removal operation of the bucket is continued.

The flowchart shown in FIG. 10 is only an example, and processes may be added or omitted as appropriate, and the order of processes may be changed as appropriate.

Next, a modification of the embodiment of the present invention will be described.

The discharge flow rate map stored in the storage unit 522 includes, in addition to the steady discharge rate map used during normal operation, the discharge flow rate of the variable displacement pump 511 relative to the operation amount of the operating lever is set to be larger than the steady discharge rate map. It has an increased discharge amount map.

When pattern A is set, when the right operating lever 332d is tilted back and forth while pressing the switch 332d1, the execution processing unit 523 refers to the increased discharge amount map and adjusts the variable displacement according to the amount of operation. The discharge flow rate of the pump 511 is set, and at the same time, the boom cylinder 480 is moved with reference to the speed increase operation map, and the up and down movement of the boom 420 is performed at a higher speed than when the operation is performed without pressing the switch 332d1. It can be repeated. In other words, the control according to the present invention can be said to be suitable for pile driving and compaction operations.

Next, a second embodiment of the present invention will be described using FIG. 1, FIG. 6, and FIG. 7, but a description of parts common to the first embodiment will be omitted.

As shown in FIG. 6, a switch 332d1 is installed at the rear (operator side) of the upper end of the grip of the right operating lever 332d to increase the response of the work equipment actuator to the operation of the right operating lever 332d. A switch 332c1 is installed at the rear of the upper end (on the operator's side) of the left operating lever 332c to increase the operational responsiveness of the work implement actuator corresponding to the operation of the left operating lever 332c.

When the right operation lever 332d is tilted forward or backward while pressing the switch 332d1 with the A pattern set, the execution processing unit 523 moves the boom cylinder 460 with reference to the speed increase operation map, and the boom 420 Compared to an operation performed without pressing the switch 332d1, the vertical movement can be repeatedly performed at high speed. In other words, the control according to the present invention can be said to be suitable for pile driving and compaction operations.

Furthermore, when the left operation lever 332c is tilted forward or backward while pressing down the switch 332c1, the execution processing unit 523 moves the arm cylinder 470 with reference to the speed increase operation map, without pressing the switch 332d1 against the arm 430. The cloud operation and dump operation can be repeatedly performed at a higher speed than the previous operation. That is, the control according to the present invention can be said to be suitable for leveling work during rolling operation.

When the operation pattern is changed from pattern A to pattern D by operating the display device 334, the execution processing unit 523 refers to the operation responsiveness map for pattern D from the operation signal transmitted in response to the operation of the operation device 332. , outputs a signal to the electromagnetic proportional valve 517 of the control valve 514 to move the actuator.

Next, when the right operation lever 332d is tilted back and forth while pressing the switch 332d1 with the setting changed to pattern D, the execution processing unit 523 refers to the speed increase operation map and moves the arm cylinder 470. By moving the arm 430, the cloud operation and dump operation can be repeated at a higher speed than when the switch 332d1 is not pressed.

Furthermore, when the left operating lever 332c is tilted back and forth while pressing down the switch 332c1, the execution processing unit 523 moves the boom cylinder 480 with reference to the speed increase operation map, without pressing the switch 332c1 against the boom 420. It is possible to repeatedly perform up and down movements at high speed compared to operations performed previously.

In other words, according to the configuration of the present invention, a switch for increasing the operation response of the work equipment actuator is attached to the operation lever corresponding to the actuator to which the operation is assigned, so that it easily meets the purpose of operation. It is possible to provide a working machine whose operability can be changed.

Next, a third embodiment of the present invention will be described using FIG. 1, FIG. 6, and FIG. 7, but a description of parts common to the first and second embodiments will be omitted.

As shown in FIG. 6, a switch 332d1 is attached to the rear of the upper end (operator side) of the grip portion of the right operating lever 332d, and a switch 332d1 is installed to the rear of the upper end (operator side) of the left operating lever 332c. A switch 332c1 is installed, but the switch for increasing the operational response of the work implement actuator is installed on the operating lever to which the turning operation is not assigned.

When pattern A is set on the display device 334, since the swing operation is assigned to the left operation lever 332c, the switch for increasing the operation response of the work equipment actuator is assigned to the right switch, which is assigned to the boom operation. The switch 332d1 is attached to the operating lever 332d.

When pattern B is set on the display device 334, since the swing operation is assigned to the left operation lever 332c, the switch for increasing the operation response of the work equipment actuator is assigned to the right switch, which is assigned to the boom operation. The switch 332d1 is attached to the operating lever 332d.

When the C pattern is set by the display device 334, since the swing operation is assigned to the right operation lever 332d, the switch for increasing the operation response of the work equipment actuator is assigned to the left operation lever 332d, which is assigned to the boom operation. The switch 332c1 is attached to the operating lever 332c.

When the D pattern is set by the display device 334, since the swing operation is assigned to the right operation lever 332d, the switch for increasing the operation response of the work equipment actuator is assigned to the left operation lever 332d, which is assigned to the boom operation. The switch 332c1 is attached to the operating lever 332c.

In addition to changing the operation pattern, the operation pattern can be changed by attaching a function to increase operation response to the control lever to which rotation operation is not assigned (the control lever assigned to boom operation) and assigning it to the switch. Even if this is done, the operability can be easily changed to suit the purpose of operation.

The invention according to the embodiment of the present invention can be specified as follows.

<Additional Note 1> A pair of operating levers to which swing operation and work equipment operation are assigned, and a control device that controls the operational response of an actuator operated by the work equipment operation, and the control device has a control device that controls the actuator. A construction machine, wherein the operating lever is equipped with a switch for executing a first control that increases the operational responsiveness of the construction machine.

<Supplementary Note 2> The construction machine according to Supplementary Note 1, wherein the switch is arranged on one side of the operating lever.

<Supplementary Note 3> The construction machine according to Supplementary Note 1 or 2, wherein the turning operation is arranged on the other side of the operating lever.

<Supplementary Note 4> The construction machine according to any one of Supplementary Notes 1 to 3, wherein the switch is a momentary operation type push button switch.

<Supplementary Note 5> The construction machine according to any one of Supplementary Notes 1 to 4, wherein the switch is attached to a grip portion of the operating lever.

<Supplementary Note 6> The construction machine according to any one of Supplementary Notes 1 to 5, wherein the switch is attached to an upper end of a grip portion of the operating lever.

<Additional Note 7> The control device executes a second control for changing the assignment of the swing operation and the work equipment operation to the pair of operation levers, and the switch is configured to control the one to which the swing operation is not assigned. The construction machine according to any of appendices 1 to 6, which is attached to the operating lever of.

<Additional Note 8> The control device executes a second control for changing the assignment of the turning operation and the work equipment operation to the pair of operation levers, and the switch is separately attached to the pair of operation levers. The construction machine according to any one of Supplementary Notes 1 to 7, wherein the control device causes the switch to execute the first control on an actuator whose operation is assigned to the operation lever.

<Supplementary Note 9> Any one of Supplementary Notes 1 to 2, wherein, in addition to executing the first control, the control device executes a third control for increasing the discharge amount of the pump that pumps hydraulic oil to the actuator. Construction machinery listed in .

The various configurations described in the first, second, and third embodiments or modified examples described above can be employed in appropriate combinations.

In the above explanation, a hydraulic excavator is used as an example of a construction machine. However, the construction machine is not limited to a hydraulic excavator, and may be other construction machines such as a crawler crane or a rough terrain crane. Although the explanation has been given using an electric motor, an electric motor may also be used.

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and can be expanded or modified without departing from the spirit of the invention.

The present invention relates to construction machinery and has industrial applicability.

332c Operation lever (left operation lever) 332d Operation lever (right operation lever) 332d1 Switch 460 Actuator (boom cylinder) 480 Actuator (bucket cylinder) 520 Control device

Claims (9)

a pair of operating levers to which swing operations and work equipment operations are assigned, and a control device that controls the operational responsiveness of an actuator operated by the working equipment operation, and the control device controls the operational responsiveness of the actuator. A construction machine, wherein the operating lever is equipped with a switch for executing a first control for raising the level. The construction machine according to claim 1, wherein the switch is located on one side of the operating lever. The construction machine according to claim 2, wherein the turning operation is arranged on the other side of the operating lever. 4. The construction machine according to claim 3, wherein the switch is a momentary operation type push button switch. The working machine according to claim 4, wherein the switch is attached to a grip portion of the operating lever. The construction machine according to claim 5, wherein the switch is attached to an upper end of a grip portion of the operating lever. The control device executes a second control for changing the allocation of the swing operation and the work machine operation to the pair of operation levers,
The construction machine according to claim 1, wherein the switch is attached to an operating lever to which the turning operation is not assigned. The control device executes a second control for changing the assignment of the turning operation and the work equipment operation to the pair of operation levers, and the switch is separately attached to the pair of operation levers, The construction machine according to claim 1, wherein the control device causes the switch to execute the first control on an actuator whose operation is assigned to the operation lever. 9. In addition to executing the first control, the control device executes a third control for increasing a discharge amount of a pump that pumps hydraulic oil to the actuator. Construction machinery listed in .