JPH11311134A - Engine control device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate a construction machine emergently or redundantly when an operation of an engine rotation regulating means is impossible by enabling connection of a governor lever and a cable member to each other. SOLUTION: A connecting condition of a cable member 37 and a fuel cut lever 25 is released, and a governor lever 25 and the cable member 37 are connected to each other in a condition in which connection of the governor lever 25 and an acceleration motor 28 and connection of a cable member 37 and a fuel cut lever 26 are released. In the case where the operation of governor lever 25 for regulating engine rotating speed is impossible or abnormal, by the damage or the like of equipment for controlling the acceleration motor 28 and an engine 21, connection of the cable member 37 is switched from the fuel cut lever 26 into the governor lever 25, and the cable member 37 for stopping the engine 21 is operated by a driver, and thereby, rotating speed of the engine 21 can be regulated to desired rotating speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a control device for an engine mounted on a construction machine such as a hydraulic shovel.

[0002]

2. Description of the Related Art FIG. 7 is a circuit diagram of a main part of an engine control device 1 described in Japanese Patent Application Laid-Open No. 6-299885. In the figure, 2 is an engine, 3 is a governor, 4 is a governor lever of the governor 3, 5 is a throttle device, 7 is a potentiometer of the throttle device 5, 8 is a work mode switch, 9 is a controller, and 10 is a control motor such as a stepping motor. A governor motor (also referred to as an accelerator motor) 11 is a drive lever of the governor motor 10.

[0003] In the prior art engine control device 1 shown in FIG. 7, a signal from a potentiometer 7 of a throttle device 5 and a mode switch 8 are transmitted to a controller 9.
The controller 9 outputs a command signal from the controller 9 to the governor 3 via the governor motor 10 to control the engine speed.

FIG. 8 is a circuit diagram showing a conventional engine stopping device disclosed in Japanese Utility Model Laid-Open No. 3-92537. In the figure, 12 is a key switch, 13 is a stop control switch having a timer function, 14 is an electric motor with a speed reducer, 15 is an output shaft of the electric motor 14, 16 is a fuel cutoff operating tool, 17 is an output shaft 15 and fuel Shut-off operation tool 16
And 18 a power supply.

[0005] In one embodiment of the prior art engine stop device shown in Fig. 8, an operating engine (not shown) is used.
When the key switch 12 is turned off to stop the operation, the operation of the stop control switch 13 having a timer function causes the electric motor 14 to operate after a lapse of several seconds. Then, the fuel cutoff operation tool 16 is operated to the fuel cut position to cut off the fuel supplied to the combustion chamber (not shown) of the engine.

[0006]

When a construction machine equipped with the engine control device 1 shown in FIG.
When the governor motor (accelerator motor) 10 breaks down for some reason, it is necessary to urgently operate the construction machine in order to make it ready for repair. In addition, in order not to reduce the operation rate of the construction machine, it is desirable that the redundant operation can be performed so that the minimum work can be performed. But governor 3
, The required engine rotation cannot be obtained, and the construction machine cannot be operated urgently or redundantly. In the engine stop device shown in FIG. 8, by turning off the key switch 12, the fuel cut-off operation tool 16 can be returned to the fuel cut position with a delay of a predetermined few seconds. It is not possible to adjust the engine speed in the event of an emergency when a component of the rotation adjusting means fails. An object of the present invention is to provide an engine control device capable of urgently or redundantly operating a construction machine when the operation of an engine rotation adjusting unit is disabled due to a failure of an accelerator motor for controlling the engine rotation or the like. And

[0007]

An engine, a governor lever for adjusting the engine speed, an accelerator motor for driving the governor lever, connecting means for connecting the governor lever and the accelerator motor, and the governor lever is provided separately from the governor lever. A fuel cut lever for stopping an engine, and a cable member having one end connected to the fuel cut lever and the other end disposed at a position operable by a driver of the construction machine; The connection state of the governor lever and the accelerator motor can be released, the connection state of the cable member and the fuel cut lever can be released, the governor lever and the accelerator motor, the cable member and the fuel cut lever,
In each connection release state, the governor lever and the cable member can be connected.

Accordingly, when the governor lever for adjusting the engine speed cannot be driven or becomes abnormal due to the failure of the accelerator motor or the equipment for controlling the engine (controller and related harnesses, etc.). By connecting the cable member from the fuel cut lever to the governor lever, the driver can adjust the engine speed to a required speed by operating the engine stop cable member.

The cable member has an inner cable through which a driver can pull at least the fuel cut lever, and an outer tube for inserting and guiding the inner cable, and an end of the outer tube on the side of the fuel cut lever. A cable support member for positioning and supporting the outer cable; a first cable support portion for positioning and supporting the outer tube in a state where the inner cable is connected to the fuel cut lever; and the inner cable. Formed a second cable support portion for positioning and supporting the outer tube while being connected to the governor lever.

Accordingly, even in an engine in which the governor lever and the fuel cut lever are arranged at a distance from each other, the governor lever can be moved to the required engine speed by the cable member without sacrificing the effective stroke of the inner cable. Can be adjusted to a number.

The cable member has an inner cable through which a driver can pull at least the fuel cut lever, and an outer tube for inserting and guiding the inner cable, and an end of the outer tube on the side of the fuel cut lever. A cable support member for positioning and supporting the portion, a distance between an outer tube support portion of the cable support member and a rotation fulcrum of the fuel cut lever, and a distance between the outer tube support portion and the rotation fulcrum of the governor lever. The distance was set to be approximately the same.

According to this, even if the cable supporting member is fixedly supported at only one place, the effective stroke amount of the inner cable is not sacrificed and the governor lever is moved by the cable member as in the case described above. Can be adjusted to the required engine speed.

Further, since the fixing means for fixing the inner cable of the cable member is provided so that the governor lever is positioned at a required operation position, the fuel cut lever is moved to the engine stop position when the engine is stopped in an emergency. In addition to being able to hold the engine, the governor lever can be set so that the engine can maintain the required redundant speed when the accelerator motor or the like fails.

In the above case, the cable member is a push-pull cable capable of pushing and pulling the fuel cut lever and the governor lever. Alternatively, the fuel cut lever and the governor lever are pull cables which cannot be pulled and operated, and biasing means for biasing the fuel cut lever and the governor lever in the direction of pushing the cable member is provided.

Alternatively, an engine, a governor lever for adjusting the engine speed, an accelerator motor for driving the governor lever, connecting means for connecting the governor lever and the accelerator motor, and one end connected to the governor lever, An accelerator cable member disposed so as to be operable from a cab of a construction machine, wherein the governor lever is urged in a direction in which the engine speed is reduced, and the accelerator cable member is The governor lever is operable in a direction in which the engine speed increases, and the accelerator cable member is connected to the governor lever so that the governor lever is idle when the governor lever is driven by the accelerator motor.

According to this, when the governor lever for adjusting the engine speed cannot be driven or becomes abnormal due to a failure of the accelerator motor and the equipment for controlling the engine (controller and related harnesses, etc.). The driver can adjust the engine speed to the required speed by operating the accelerator cable member without the need to disconnect the governor lever and cables, etc. And redundant operation until repair.

Further, a yoke member is connected to one end of the accelerator cable member, and an elongated hole is formed in the yoke member, and the governor lever and the accelerator cable member are brought into a floating state through a pin inserted into the elongated hole. In such a case, since the governor lever can swing separately from the accelerator cable member in the length range of the elongated hole, when the accelerator motor and the equipment for engine control are normal,
The operation can be performed without applying a load such as an accelerator cable member to the accelerator motor.

Alternatively, even when an elongated hole is formed in the governor lever and the governor lever and the accelerator cable member are connected so as to be in a swinging state via a pin inserted into the elongated hole, the same operation as in the above-described case is achieved. Can be obtained.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram illustrating an engine control device according to an embodiment of the present invention. In the figure, reference numeral 21 denotes an engine (shown in phantom lines for easy understanding of the configuration) mounted on, for example, a hydraulic shovel (the whole view is not shown) of the construction machine, 22
Is an intake valve provided in the engine 21, 23 is a fuel injection pump, 25 is a governor lever for adjusting the rotation speed of the engine 21, 26 is a fuel cut lever for forcibly stopping the engine in an emergency or the like, and 27 is an upper part of a hydraulic shovel. An accelerator motor mounting bracket fixed to a body frame (described later) of a revolving body (not shown), 28 is an accelerator motor, 29 is a drive lever of the accelerator motor 28, and 30 is an accelerator motor 28 (details). A rod 31, which is a connecting means for connecting the drive lever 29 of the accelerator motor 28) to the governor lever 25, is a spring member (a tension member in this embodiment) which is a biasing means for biasing the governor lever 25 in one direction (described later). A helical spring is used.)
2 is a driver's seat in a driver's cab (not shown) mounted on the upper swing body, 33 is a driver seat 32, 34 is a seat stand fixedly attached to a floor plate 35 in the driver's cab, Reference numeral 36 denotes a slide rail provided so that the seat 33 is slidable in the front-rear direction with respect to the seat stand 34. Reference numeral 37 denotes a state where one end is connected to the fuel cut lever 26 (in FIG. 1, the state is connected to the governor lever 25). However, a state in which the other end is connected to the fuel cut lever 26 will be described later.) A cable member (there is also a portion shown by a broken line) whose other end is disposed at a position in the driver's seat 32 which can be operated by the driver. Numeral 38 denotes a knob at the operation end of the cable member 37 (not shown because the knob 38 is arranged on the side opposite to the seat stand 34 in the figure), and numeral 39 denotes a structural part of the body frame. Cable support member for a cable member 37 is formed by a support fixed to, 39a, 39 b are respectively the first cable support member 39 where the cable member 37 is positioned and supported, a second cable support section. The center O1 is the rotation fulcrum of the governor lever 25, the center O2 is the rotation fulcrum of the fuel cut lever 26, the symbol A is the intake cutoff position of the governor lever 25, the symbol B is the intake fully open position,
Reference symbol C denotes a fuel cut-off position of the fuel cut lever 26.

FIG. 2 is an enlarged view around the engine 21 and the accelerator motor 28 in FIG. In the figure, 3
Reference numeral 7i denotes an inner cable of the cable member 37 which can be pulled at least, and reference numeral 24 denotes an inner cable 37.
An outer tube 6 for inserting and guiding i is a bolt member for pivotally supporting the mounting end of the cable member 37 with respect to the governor lever 25 or the fuel cut lever 26.

FIG. 3 is a front view of the driver's seat 32 in FIG. In the figure, reference numeral 40 denotes a bracket (38) for fixing the knob (38) fixed to the side of the seat stand 34. FIG. 4 is a configuration diagram showing a state of the engine control device of the present embodiment before construction for emergency response. FIG. 5 is an enlarged view around the engine 21 and the accelerator motor 28 in FIG.

FIG. 6 shows a body frame 41 of an upper revolving structure of a hydraulic excavator provided with the engine control device of the present embodiment.
FIG. 2 is a plan view of a main part, but an engine mounting bracket to which the engine 21 is attached is not shown. In the drawing, reference numeral 42 denotes a plate member of the body frame 41 to which the cable support member 39 is fixed, and reference numeral 43 denotes a clip member that fixes the push-pull cable 37 to the body frame 41 or a structure fixed to the body frame 41. And 44, grommets for inserting and stopping the push-pull cable 37.

Next, the structure and operation of the engine control device according to the present embodiment will be described with reference to FIGS. In the present embodiment, the engine 21, a governor lever 25 for adjusting the number of revolutions of the engine 21, an accelerator motor 28 for driving the governor lever 25, a rod 30 as a connecting means for connecting the governor lever 25 and the accelerator motor 28, and a governor lever A fuel cut lever 26 for stopping the engine 21 separately from the fuel cut lever 25, and a position where one end is connected to the fuel cut lever 25 and the other end is operable by a driver of the hydraulic shovel (operating side And a cable member 37 disposed at a position where the knob 38 is provided).
The rod 30 as the connecting means can release the connection between the governor lever 25 and the accelerator motor 28 (can be released by removing the bolt member 6 in FIGS. 4 and 5).
The connection between the cable member 37 and the fuel cut lever 26 can be released (can be released by removing the pin member 45 in FIGS. 4 and 5), and the governor lever 25 and the accelerator motor 28, the cable member 37 and the fuel cut lever 26 can be released. In each of the disconnected states, the governor lever 26 and the cable member 37 can be connected.

Thus, the accelerator motor 28,
If the governor lever 25 for adjusting the engine speed cannot be driven or becomes abnormal due to a failure of equipment for controlling the engine 21 (not shown, such as a controller and related harnesses), the cable member 37 is used. Is connected to the governor lever 25 from the fuel cut lever 26, the driver can operate the cable member 37 for stopping the engine 21 to adjust the rotation speed of the engine 21 to a required rotation speed.

The cable member 37 includes an inner cable 37i (shown in FIGS. 5 and 2) which allows the driver to pull at least the fuel cut lever 26, and an outer tube 24 for inserting and guiding the inner cable 37i.
And the fuel cut lever 2 of the outer tube 24
A cable support member 39 for positioning and supporting the 6-side end is provided.
Is connected to the fuel cut lever 26 (the state shown in FIG. 5) to position and support the outer tube 24.
And a second cable support portion 39b for positioning and supporting the outer tube 24 in a state where the inner cable 37i is connected to the governor lever 25 (shown in FIG. 2).

Thus, even if the engine 21 is disposed at a position where the governor lever 25 and the fuel cut lever 26 are separated (a position separated by a dimension L as shown in FIG. 1), the effective stroke of the inner cable 37i is The governor lever 25 can be adjusted by the cable member 37 so that the engine 21 has the required rotational speed without sacrificing the amount.

The cable member 37 has an inner cable 37i through which a driver can pull at least the fuel cut lever 26, and an outer tube 24 for inserting and guiding the inner cable 37i. A cable support member 39 'for positioning and supporting the end of the lever 26 is provided. As shown in FIG. 2, a distance L2 between the outer tube support 39c of the cable support member 39' and the pivot O2 of the fuel cut lever 26 is provided. And the distance L1 between the outer tube support portion 39c and the pivot O1 of the governor lever 25 are set to be substantially the same.

According to this, the cable supporting member 39 'is provided only at one place in the body frame 41,
7, the governor lever 25 can be adjusted by the cable member 37 to the required engine speed without sacrificing the effective stroke amount of the inner cable 37i as in the case described above. it can.

Further, a fixing means (not shown but used for a commercially available push-pull) for fixing the inner cable 37i of the cable member 37 so that the governor lever 25 is positioned at a required operation position. (Inner cable lock structure), not only can the fuel cut lever 26 be held at the engine stop position C when the engine 21 is stopped urgently, but also when the accelerator motor 28 or the like fails, the governor lever 25 is
Can be set to be held at a required redundant rotation speed.

In the above case, the cable member 37 is
The fuel cut lever 26 and the governor lever 25 are push-pull cables that can be pushed and pulled. Alternatively, the fuel cut lever 26 and the governor lever 25 are formed as pull cables that cannot be pushed, and the fuel cut lever 26
A biasing means (spring member 31) is provided for pushing the governor lever 25 in the direction in which the cable member 37 is pushed.

FIG. 7 is a diagram showing another embodiment of the present invention. In the drawing, reference numeral 60 denotes an accelerator motor, 61 denotes a drive lever of the accelerator motor 60, 62 denotes a governor lever for adjusting the engine speed of an engine (not shown), and is constantly urged in the rightward direction by a spring member (not shown). . 63 is a rod connecting the drive lever 61 and the governor lever 63, 64 is an accelerator cable member, 65 is a yoke member connecting the accelerator cable member 64 and the governor lever 62, 66 is a long hole formed in the yoke member 65, 67 is a governor lever 62 , A control box 68 disposed beside a driver's seat (not shown) of the construction machine, and 69 a control box 68.
An operation lever 70 for operating an actuator of the construction machine disposed above is connected to the accelerator cable member, and can be locked at a predetermined position by a pulling operation (in the direction of arrow A in the drawing) (shown in the figure). ), A reference numeral 71 denotes an engine speed setting means for adjusting the engine speed, 72 a controller which receives an output signal from the engine speed setting means and outputs a drive signal to the accelerator motor 60, 73, 74 schematically shows harnesses for electrically connecting the engine speed setting means 71 to the controller 72 and the controller 72 to the accelerator motor 60; 75, an inner cable of the accelerator cable member 64; 76, an accelerator cable member 64 outer tubes, 77 support the outer tubes 76 Cable support member 78 is a pin for connecting through the elongated hole 66, 67 the governor lever 62 and the yoke member 65. Α is the governor lever 6 in a state where the load on the accelerator cable member does not act due to the elongated hole 66.
2 is a floating angle at which the governor lever 62 can swing in a state in which the load on the accelerator cable member does not act due to the elongated hole 67.
The center O3 is the center of rotation of the governor lever 62.

According to the present embodiment, the accelerator motor 62
And engine control devices not shown (controller 7
2 and the associated harnesses 73 and 74) are operating normally, and when the driver operates and sets the engine speed setting means 71 to a required engine speed, the controller 72 sends a drive signal to the accelerator motor 60. Is output.
As a result, the accelerator motor 62 rotates leftward by a required amount, that is, the rod 63 moves in the direction of arrow B, whereby the governor lever 62 rotates leftward about the rotation fulcrum O3, and the engine speed reaches the required speed. Speed up. When the engine speed is reduced, the engine speed setting means 71 is similarly set.
By operating, the accelerator motor 60 is rotated rightward and the governor lever 62 is rotated rightward to reduce or further stop the engine speed. In this case, the governor lever 62 is in a floating state with respect to the accelerator cable member 64 within the range of the angle α + β by the elongated hole 66 provided in the yoke member 65 and the elongated hole 67 provided in the governor lever 62, and the accelerator cable member 64 and the redundant accelerator operation lever are provided. The accelerator motor 60 can rotate the governor lever 62 by a required amount without being affected by 70. The angle α + β is set substantially equal to the swing amount of the governor lever 62 required to change the engine speed from the stopped state to the maximum speed state.

The accelerator motor 60 or the controller 7
2 or when the engine speed setting means 71 breaks down or the harnesses 73 and 74 are disconnected, the engine speed setting means 71 cannot operate and set the engine speed. In this case, when the redundant accelerator operation lever 70 is operated in the direction of arrow A, the inner cable 75 moves in the direction of arrow C, and accordingly, the yoke 65 moves in the direction of arrow C, and furthermore, the governor lever connected via the pin 78 is connected. 62 rotates counterclockwise against the urging force of the spring member, and the engine speed is increased according to the operation amount of the redundant accelerator operation lever 70. Since the redundant accelerator operation lever 70 has a lock mechanism, a required operation state can be maintained, and thereby the driver can operate the construction machine at a required engine speed. When the engine speed is reduced or stopped, the governor lever 6 is released by releasing the lock mechanism and returning the redundant accelerator operation lever to the original position.
Reference numeral 2 denotes an urging force of a spring member, which rotates in a direction in which the engine speed is reduced or stopped (clockwise rotation), and the engine speed falls to a predetermined idling speed or is stopped. At this time, since the pin 78 moves in the elongated hole 66, the governor lever 62 can be swung only by the urging force of the spring member. Further, the swing angle of the governor lever 62 can be suppressed by the angle β by the long hole 67, and the maximum engine speed during the redundant operation can be suppressed by a predetermined amount by setting the length of the long hole 67. .

Recent construction machines are equipped with a controller 72 and the like, so that various additional controls can be applied to the engine speed (a maximum speed control based on work contents, a control lever 69 for an actuator, etc.). It is possible to control the engine speed in accordance with the operation amount, decelerate the engine speed by detecting an unoperated state of the operation lever 69 or the like for a predetermined period of time, etc.). For example, even when the controller 72 or the like fails, only additional control becomes impossible, and the engine speed can be adjusted according to the driver's intention. Therefore, the construction machine does not get stuck, and until the repair is completed. Also, since the construction machine can be used, the operation rate does not decrease.

[0035]

According to the first aspect of the present invention, it is impossible to drive the governor lever for adjusting the engine speed due to a failure of the accelerator motor or equipment for controlling the engine (such as a controller or related harnesses). Alternatively, when an abnormality occurs, the driver adjusts the engine speed to a required speed by operating the cable member for stopping the engine by connecting the cable member from the fuel cut lever to the governor lever. be able to. As a result, even when the accelerator motor or the like fails, the engine can be operated redundantly at the required number of revolutions, and the machine down of the construction machine can be prevented, and a decrease in work efficiency can be minimized.

According to the second aspect of the present invention, even in an engine in which the governor lever and the fuel cut lever are disposed at a distance from each other, the effective stroke of the inner cable is not sacrificed, and the cable member is not sacrificed. Thus, the governor lever can be adjusted to a required engine speed. Thus, in any type of engine, the shape of the cable support member is changed (the relative positional relationship between the first cable support portion and the second cable support portion is changed). The effect of the invention can be achieved.

According to the third aspect of the present invention, even if the cable supporting member fixedly supports the cable member at only one place,
By adjusting the disposition position of the cable support member, the governor lever is adjusted by the cable member to the required engine speed without sacrificing the effective stroke amount of the inner cable as in the second aspect of the invention. can do.

According to the present invention, not only can the fuel cut lever be held at the engine stop position when the engine is stopped urgently, but also when the accelerator motor or the like fails.
The governor lever can be set to keep the engine at the required redundant speed. If the fixed position of the inner cable is made variable stepwise or continuously, the engine speed can be more finely adjusted.

According to the fifth aspect of the present invention, since the push-pull operation can be performed only by the cable member, the inventions of the first to fourth aspects can be implemented with a simple structure. Further, according to the invention described in claim 6, by using a pull cable which is less expensive than the push-pull cable according to claim 5, the manufacturing cost is reduced, and the fuel cut lever and the governor lever are biased in the direction in which the engine stops. Thus, the engine can be stopped when the cable is damaged.

According to the sixth aspect of the present invention, it is determined that the governor lever for adjusting the engine speed cannot be driven or is abnormal due to a failure of the accelerator motor or the equipment for controlling the engine (controller and related harnesses, etc.). In the event of an emergency, the driver can adjust the engine speed to the required speed by operating the accelerator cable member without the need for trouble such as disconnecting the governor lever and cables. It is possible to move redundant construction machines and perform redundant operation until repair.

According to the seventh and eighth aspects of the present invention, the governor lever can swing independently of the accelerator cable member within the length range of the elongated hole, so that the accelerator motor and the equipment for controlling the engine can operate normally. In this case, the operation can be performed without applying a load such as an accelerator cable member to the accelerator motor.

As described above, according to the present invention, even when the accelerator motor or the equipment for controlling the engine (controller and related harnesses, etc.) fails, the required engine rotation according to the driver's intention is performed. The number of engines can be operated redundantly, the construction machine does not get stuck, and work can be performed until repair, so that the operation rate of the construction machine does not decrease.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an engine control device according to an embodiment of the present invention.

FIG. 2 is an enlarged view around an engine and an accelerator motor in FIG. 1;

FIG. 3 is a front view of the driver's seat in FIG.

FIG. 4 is a configuration diagram showing a state of the engine control device according to the present embodiment before construction for emergency response.

FIG. 5 is an enlarged view around the engine and the accelerator motor in FIG. 4;

FIG. 6 is a main part plan view showing a body frame of an upper swing body of the hydraulic shovel provided with the engine control device of the present embodiment.

FIG. 7 is a configuration diagram showing an accelerator motor, a governor lever, an accelerator cable member, a control box, and the like according to another embodiment of the present invention.

FIG. 8 is a circuit diagram of a main part of an engine control device according to an embodiment of the prior art.

FIG. 9 is a circuit diagram showing an engine stop device according to one embodiment of the prior art.

[Explanation of symbols]

 2,21 engine 4,25,62 governor lever 24 outer tube 26 fuel cut lever 28,60 accelerator motor 30,63 rod 31 spring member 32 driver's seat 37 cable member 37i inner cable 38 knob 39,39 ', 77 cable support member 39a , 39b, 39c Cable support portion 41 Body frame 64 Accelerator cable member 65 Yoke member 66, 67 Slot hole 68 Control box 70 Redundant accelerator operation lever 71 Engine speed setting means 72 Controller 75 Inner cable 76 Outer tube

Claims (9)

[Claims] 1. An engine, a governor lever for adjusting an engine speed, an accelerator motor for driving the governor lever, connecting means for connecting the governor lever and the accelerator motor, and stopping the engine separately from the governor lever. A fuel cut lever, and a cable member having one end connected to the fuel cut lever and the other end disposed at a position operable by a driver of the construction machine, wherein the connecting means is provided with the governor lever. The connection state of the accelerator motor can be released, the connection state of the cable member and the fuel cut lever can be released, and the connection between the governor lever and the accelerator motor, the connection between the cable member and the fuel cut lever can be released. In the state, the governor lever and the cable member can be connected. An engine control device for a construction machine. 2. The fuel cut lever of the outer tube, wherein the cable member has an inner cable that allows a driver to pull at least the fuel cut lever, and an outer tube that inserts and guides the inner cable. A cable support member for positioning and supporting a side end, wherein the cable support member positions and supports the outer tube in a state where the inner cable is connected to the fuel cut lever; and The engine control device for a construction machine according to claim 1, wherein a second cable support portion for positioning and supporting the outer tube is formed in a state where the inner cable is connected to the governor lever. 3. The fuel cut lever of the outer tube, wherein the cable member has an inner cable that allows a driver to pull at least the fuel cut lever, and an outer tube that inserts and guides the inner cable. A cable support member for positioning and supporting the side end; a distance between an outer tube support portion of the support member and a rotation fulcrum of the fuel cut lever; and a distance between the outer tube support portion and the rotation fulcrum of the governor lever. The engine control device for a construction machine according to claim 1, wherein the distances are set to be substantially equal. 4. The construction machine according to claim 1, further comprising fixing means for fixing the inner cable of the cable member so that the governor lever is positioned at a required operation position. Engine control device. 5. The engine control device for a construction machine according to claim 1, wherein the cable member is a push-pull cable capable of pushing and pulling the fuel cut lever and the governor lever. 6. The cable member according to claim 1, wherein the fuel cut lever and the governor lever are inoperable pull cables, and the cable member has an urging means for urging the fuel cut lever and the governor lever in a pushing direction of the cable member. The engine control device for a construction machine according to any one of claims 1 to 4, wherein: 7. An engine, a governor lever for adjusting the engine speed, an accelerator motor for driving the governor lever, connecting means for connecting the governor lever and the accelerator motor, one end connected to the governor lever, and the other end connected to the governor lever. An accelerator cable member disposed so as to be operable from a cab of a construction machine,
The governor lever is urged in a direction in which the engine speed is reduced, the accelerator cable member enables the governor lever to be operated in a direction in which the engine speed increases, and the governor lever is driven by the accelerator motor. The engine control device for a construction machine, wherein the accelerator cable member is connected to the governor lever so that the accelerator cable member moves freely. 8. A yoke member is connected to one end of the accelerator cable member, an elongated hole is formed in the yoke member, and the governor lever and the accelerator cable member are brought into a floating state through a pin inserted into the elongated hole. The engine control device for a construction machine according to claim 7, wherein the engine control device is connected to the engine control device. 9. The governor lever according to claim 7, wherein an elongated hole is formed in the governor lever, and the governor lever and the accelerator cable member are connected in a swinging state via a pin inserted into the elongated hole. Engine control device.