KR20140061004A

KR20140061004A - A control method for backhoe loader

Info

Publication number: KR20140061004A
Application number: KR1020120128075A
Authority: KR
Inventors: 김형준
Original assignee: 현대중공업 주식회사
Priority date: 2012-11-13
Filing date: 2012-11-13
Publication date: 2014-05-21

Abstract

The present invention relates to a method for controlling a backhoe loader having a backhoe working device and a loader working device comprising the steps of sensing a working load of the working device; determining whether or not the working load exceeds a previously set value; and limiting driving speed when the working load exceeds the previously set value. The method for controlling the backhoe loader according to the present invention senses the working load of the backhoe working device and the loader working device and limits driving speed when the working load exceeds the previously set value, thereby sharply reducing the risk of accidents by the working device and achieving safe operation.

Description

{Control method for backhoe loader}

The present invention relates to a control method of a backhoe loader.

Construction equipment generally refers to construction civil engineering machinery, and each construction such as roads, rivers, ports, railways, and plants has a structure and performance suited to its characteristics. In other words, the construction equipment can be divided into excavation equipment, loading equipment, conveying equipment, loading equipment, compaction equipment, foundation equipment and the like due to the variety of work done in the industrial field. Specifically, the construction equipment can be classified into bulldozer, excavator, , Rollers, and the like.

The most basic work performed in the industrial field is digging. In the case of industrial construction, excavation works are mostly carried out by excavating the ground to a certain depth and installing various structures or laying pipes on the ground.

An excavator is a construction machine that carries out works such as excavation work for digging the ground in civil engineering, construction, construction site, loading work for transporting soil, crushing work for dismantling the building, suspension work for arranging the ground, And an upper revolving body mounted on the traveling body and rotated by 360 degrees and a working device.

On the other hand, the loader, which is a loader, is a device that loads a truck or a rock with a bucket to be loaded on a truck, and precisely the excavator can also be a kind of a loader. Like an excavator, a loader can be divided into a skid steer loader, a track loader, and a wheel loader depending on the shape of the moving part.

Multi-purpose construction equipment that can perform both excavation of excavator and loading work of loader is called backhoe loader. Backhoe loader is composite construction equipment in the shape of wheel loader at the front and excavator at the rear.

The backhoe loader is moved in a state in which the bucket of the wheel loader is placed on the front when traveling, and when necessary, the backhoe is placed in front of the operator as the worker's chair is rotated 180 degrees. Therefore, the backhoe loader can be loaded by the wheel loader and can be excavated by the backhoe. Since the backhoe loader capable of performing both of these operations can improve the working efficiency, the technical development of the backhoe loader and the control system is progressing steadily.

However, in the case of such a backhoe loader, since a work device is provided in front and rear, respectively, such as a loader working device in front and a backhoe work device in the rear, the risk of accident due to the working device There is a problem that it is high.

It is an object of the present invention to provide a backhoe loader capable of preventing an accident by restricting a traveling speed when a work load by a loader work device or a backhoe work device is high, In order to provide a control method of the present invention.

A control method of a backhoe loader according to an embodiment of the present invention is a control method of a backhoe loader including a backhoe work device and a loader work device, the method comprising: detecting a work load of the work device; Determining whether the workload is equal to or greater than a predetermined value; And limiting the traveling speed when the work load is equal to or greater than a predetermined value.

A control method of a backhoe loader according to the present invention detects a workload of a loader work device and a backhoe work device and restricts a traveling speed when a work load is a predetermined value or more to greatly reduce the risk of an accident caused by a work device Safe operation can be achieved.

1 is a side view of a backhoe loader operated by a backhoe loader control method according to an embodiment of the present invention.
2 is a flowchart of a method of controlling a backhoe loader according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of a backhoe loader operated by a control method of a backhoe loader according to an embodiment of the present invention, and FIG. 2 is a flowchart of a method of controlling a backhoe loader according to an embodiment of the present invention.

Hereinafter, a backhoe loader 1 operated by a control method of a backhoe loader according to an embodiment of the present invention will be described first with reference to FIG.

The backhoe loader 1 includes a backhoe work device 10, a loader work device 20, a backhoe work device operating section (not shown), a loader operating device operating section (not shown), a traveling section 30, 40).

The backhoe work machine 10 is provided on one side of the backhoe loader 1 and includes a backhoe bucket 11, a dippers 12 and a boom 13. The boom 13 and the dippers 12 are connected to a hydraulic cylinder The position of the backhoe bucket 11 can be adjusted by being rotated by the first and second swinging members 121 and 131. For example, when the hydraulic cylinder 121 of the dipper 12 is compressed, the backhoe bucket 11 is moved forward for excavation, and the hydraulic cylinder 121 of the dipper 12 is tensioned , The backhoe bucket 11 is rotated inward to put the gravel or the like in the inner space.

Specifically, when the boom 13 is rotated upward and the hydraulic cylinder 131 of the boom 13 is compressed, the lower end of the dippers 12 is lifted. When the hydraulic cylinder 121 of the dippers 12 is compressed It is ready for excavation. Thereafter, when the boom 13 descends, the backhoe bucket 11 is brought into contact with the portion where the digging operation is required. At this time, when the hydraulic cylinder 121 of the dipper 12 is pulled, the backhoe bucket 11 can perform excavation. When the boom 13 is raised and the hydraulic cylinder 131 of the boom 13 is pulled, The backhoe bucket 11 may be provided with a plurality of buckets.

The detailed structure and operation of the dippers 12 and the boom 13 can employ the configurations of the dippers and the booms used in a general backhoe loader.

However, the backhoe work machine 10 may further include a stabilizer 14. The stabilizer 14 can move up and down by the hydraulic pressure to selectively contact the ground to fix the position of the backhoe work machine 10. [

The stabilizer 14 is located behind the backhoe work machine 10 and can be provided on both sides of the backhoe work machine 10. Further, the lower surface of the stabilizer 14 may have a flat plate shape for surface contact with the ground surface, and may have a rectangular section.

The loader working device 20 is provided on the other side of the backhoe loader 1 and comprises a loader bucket 21 and a boom 22. [ The backhoe work device 10 and the loader work device 20 can be installed at the opposite positions to each other. That is, the backhoe work device 10 is connected to the right side and the loader working device 20 is connected to the left side based on the drawing.

At this time, the boom 22 is different in shape from the boom 13 of the backhoe work machine 10, but the operation principle of moving the bucket 21 is similar. The loader bucket 21 of the loader working device 20 may have a shape that allows the gravel to be contained in the internal space in the same manner as the backhoe bucket 11. The width of the loader bucket 21 is, Lt; RTI ID = 0.0 > width. &Lt; / RTI >

The loader bucket 21 ascends or descends according to the rise or fall of the boom 22. More specifically, as the plurality of frames 221 provided on the boom 22 are rotated together, the loader bucket 21 is rotated, And the like can be carried or discharged.

The backhoe work device operation unit (not shown) operates the backhoe work device 10. [ As the backhoe work machine 10 includes the backhoe bucket 11, the dippers 12, the boom 13, and the stabilizer 14, the backhoe work device operating unit operates the detailed configuration of the backhoe work device 10 A plurality of levers (not shown) may be provided.

Further, the backhoe work device operating unit may further include a display unit (not shown) for notifying the current state of the backhoe work machine 10, and the display unit may be connected to the backhoe work device 10) can be displayed in detail.

The loader work device operation portion (not shown) operates the loader work device 20. The loader working device 20 includes the loader bucket 21 and the boom 22 so that the loader operating device operating portion includes a lever (not shown) for operating the loader bucket 21, A lever (not shown) or the like.

The loader work device operating unit may also include a display unit (not shown) for displaying the current state of the loader operating device 20, similar to the backhoe work device operating unit. At this time, the display unit may show whether the loader work unit 20 is driven, the angle or the position of the loader bucket 21, and the like.

The traveling section (30) includes a plurality of wheels (31). The backhoe loader 1 of the present embodiment is movable through a traveling portion 30 having two axes and four wheels 31. Of the two pairs of wheels 31 connected by an axis, The pair of wheels 31 disposed close to the loader device 10 may be relatively larger than the pair of wheels 31 disposed close to the loader device 20.

The reason why the traveling portion 30 is provided with the wheels 31 having different sizes is that the torque applied to the portion where the backhoe working device 10 is installed and the torque applied to the portion where the loader working device 20 is installed So that the stability is secured by using the wheel 31 having an appropriate size.

The travel control unit (40) is provided on one side of the work device control unit and operates the travel unit (30). The travel operation unit 40 may include a handle 41 for adjusting the angle of the accelerator pedal (not shown), the brake pedal (not shown) and the wheel 31 for the operation of the travel unit 30. [

The travel control unit 40 is provided on the left or right side of the loader operation device control unit so that the operator can feel the inconvenience even if the operator operates the load control unit 40 while operating the loader operation unit 20. [ That is, the travel control unit 40 may be installed at a position spaced a certain distance from the loader operation device operating unit so as not to interfere with the loader operation device control unit.

Hereinafter, a method of controlling a backhoe loader according to an embodiment of the present invention will be described in detail with reference to FIG.

2, a method of controlling a backhoe loader according to an embodiment of the present invention is a method of controlling a backhoe loader 1 including a backhoe work device 10 and a loader work device 20, (S10) of detecting a work load of the work devices (10, 20), determining whether the work load is equal to or greater than a predetermined value (S20), limiting the travel speed (S30).

In step S10, the work load of the work devices 10, 20 is sensed. At this time, the work devices 10 and 20 may mean the backhoe work device 10 and the loader work device 20. Since the backhoe loader 1 generally performs work using only one of the work devices 10 and 20, the backhoe loader 1 and the loader work device 10 20 can be detected. At this time, the work devices 10, 20, in which the work load is sensed, may mean the work devices 10, 20 driven by the worker.

The work load can be grasped through the pressure of the oil supplied to the working devices 10, 20 or the operating load of the hydraulic pump (not shown). Since the principle used to determine the load of the work devices 10 and 20 can employ a configuration used in a general backhoe loader, a detailed description will be omitted.

In step S20, it is determined whether or not the work load is equal to or greater than a predetermined value. In this case, the predetermined value may be a certain ratio with respect to the maximum load of the working devices 10, 20. For example, in step S20, it can be determined whether the work load is 30 to 70% or more of the maximum load.

At this time, since the maximum load of the work devices 10 and 20 may be different depending on the backhoe work device 10 and the loader work device 20, the default value, which is a comparison value used in step S20, 10 and the loader working device 20. [

In step S20, it is determined whether at least one of the work devices 10, 20 is equal to or larger than a preset value, or whether both of the backhoe work device 10 and the loader work device 20 are equal to or more than a predetermined value It can be judged.

However, in the case of the backhoe loader 1, it is common to use only one of the working devices 10 and 20, so that the step S20 determines whether or not the work load of the backhoe operating apparatus 10 is equal to or larger than a predetermined value, It is possible to determine whether or not the work load of the loader working device 20 is equal to or greater than a preset value and the default value at the time of comparing the work load of the backhoe work device 10, May not be the same as the pre-set value at the time of the workload comparison.

In step S30, when the work load is equal to or larger than the preset value, the running speed is limited. The backhoe loader 1 includes a backhoe work device 10 and a loader work device 20. As described above, in step S20, the work load of the backhoe work device 10 and the loader work device 20 is set The backhoe work device 10 and the loader work device 20 can be compared with each other when the work load of at least one of the backhoe work device 10 or the loader work device 20 is equal to or larger than a predetermined value at step S30, ) If both workloads are more than the preset value, the running speed can be limited.

In this embodiment, the traveling speed of the backhoe loader 1 may be limited to a predetermined value or less in step S30, and the traveling speed may be decelerated if the current traveling speed is equal to or greater than a predetermined value. However, even if the current running speed is less than a predetermined value, the present embodiment may not forcibly increase the current running speed.

When the work load is equal to or greater than the predetermined value, the present embodiment can limit the traveling speed by limiting the rotational speed transmitted to the wheel 31 of the backhoe loader 1. [ This can be implemented through the operation of an engine (not shown) or a transmission (not shown).

Alternatively, in the present embodiment, the running speed can be limited by limiting the pressing of the accelerator pedal of the travel control section 40. [ That is, if the work load is determined to be equal to or greater than the predetermined value in step S20, the traveling speed can be limited by mechanically restricting the rotational angle of the accelerator pedal in step S30. For example, a projection (not shown) that linearly moves at a position close to the axis of rotation of the accelerator pedal may be provided, and a projection may be protruded according to a work load to partially block the rotational movement of the accelerator pedal. In addition, the present invention can use any structure as long as it can restrict the rotation of the accelerator pedal.

As described above, in the present invention, when the working load of the working apparatuses 10, 20 is equal to or larger than a predetermined value, the traveling speed is forcibly restricted to restrict the movement of the backhoe loader 1 when the working apparatuses 10, The risk of accident can be greatly lowered, so that safety at the time of work can be secured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: Backhoe loader 10: Backhoe work device
11: Backhoe bucket 12: Dipper
121: Hydraulic cylinder 13: Boom
131: Hydraulic cylinder 14: Stabilizer
20: Loader working device 21: Loader bucket
22: Boom 221: Frame
30: running part 31: wheel
40:

Claims

A control method for a backhoe loader including a backhoe work device and a loader work device,
Sensing a workload of the work device;
Determining whether the workload is equal to or greater than a predetermined value; And
And restricting a traveling speed when the work load is equal to or greater than a predetermined value.

The method according to claim 1,
And a ratio of the maximum load to the maximum load of the working device.

2. The method of claim 1, wherein limiting the travel speed comprises:
Wherein when the work load of at least one of the backhoe work device and the loader work device is equal to or greater than a predetermined value, the traveling speed is limited.

2. The method of claim 1, wherein limiting the travel speed comprises:
Wherein the speed of rotation transmitted to the wheels of the backhoe loader is limited.

2. The method of claim 1, wherein limiting the travel speed comprises:
Wherein the control of the backhoe loader is performed based on a result of the determination.