KR101701801B1 - Working vehicle - Google Patents

Abstract

According to the present invention, a working machinery comprises: a main body; a rotator connected to the main body to be able to rotate, and supporting a boom; a controller controlling a rotation of the rotator in a predetermined control mode using working oil; and a hydraulic pressure provider providing working oil to the controller, wherein the predetermined control mode includes a first control mode to provide the working oil for the rotation of the rotator from the hydraulic pressure provider to the controller, and a second control mode to not provide the working oil from the hydraulic pressure provider to the controller, wherein the second control mode includes a second-first control mode to not perform rotation of the rotator, and a second-second control mode to perform rotation of the rotator. As such, the present invention may prevent vibration of a boom caused by a backlash, boom weight, inertia, etc., of a gear in case where the boom rotates and stops at a predetermined location.

Description

Working vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a working machine, and more particularly, to a work machine for controlling a turning part capable of turning a boom.

In general, a work machine having a boom can be roughly classified into a type in which the boom stands only in the left and right swings with respect to the main body of the crane, and a type in which the boom stands up and down in the vertical direction.

A main hook, a sub-hook, etc. for lifting the cargo are mounted on the tip of the boom.

These hooks are connected to each other by a wire at the front end of the boom bar, and are lifted up and down by a winding and releasing operation of the wire, so that the object to be hooked up and down is lifted up and down.

A working machine having a boom generally includes a running body capable of running, a turning part mounted on the traveling body, and a boom mounted on the turning part.

The boom can be turned clockwise and counterclockwise by the turning operation of the turning part.

That is, the turning of the boom can be realized by turning the turning part.

1 is a hydraulic circuit diagram that can realize turning of a swivel portion as a prior art.

As shown in Fig. 1, the direction of rotation of the swivel portion can be determined in accordance with the direction in which the driving portion capable of swiveling the swivel portion is rotated.

That is, the rotational direction of the swivel portion can be determined in accordance with the case where the hydraulic pressure is applied in the direction A and the hydraulic pressure is applied in the B direction toward the drive portion.

When the hydraulic pressure is not applied in the A direction and the B direction, the swivel portion may not be rotated.

Here, when the hydraulic pressure flows into the drive unit in the direction A, the swivel unit is rotated in a predetermined direction.

In this state, when the hydraulic pressure no longer flows into the drive unit in the direction A, the rotation of the swivel unit is immediately stopped, and as a result, the lifted object lifted to the boom is shaken due to inertia.

If it is shaken by the lifting water inertia, there is a problem that the safety of the worker who is working at the work place may be deteriorated and an unnecessary load is added to the boom.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to alleviate the vibration of the boom due to the backlash of the gear, the weight of the boom, inertia and the like when the boom is rotated and stopped at a predetermined position.

Further, when the salvage is lifted by the winch, when the vertical center position of the boom is not coincident with the vertical center position of the salvage, the boom is rotated in the direction of the vertical center position of the salvage without supplying any additional hydraulic pressure.

A working machine according to an embodiment of the present invention includes a main body; A swivel portion rotatably connected to the main body portion and supporting the boom; A control unit for controlling the rotation of the swivel unit to a predetermined control mode using hydraulic oil; And a hydraulic pressure supply unit for supplying the hydraulic oil to the control unit, wherein the predetermined control mode includes a first control mode in which the hydraulic oil for rotating the swivel unit is supplied from the hydraulic pressure supply unit to the control unit, And a second control mode in which the operating fluid is not supplied to the control unit, wherein the second control mode includes a second control mode in which rotation of the swivel unit is not implemented and a second control mode in which the second- And a control mode.

The second-2 control mode of the working machine according to an embodiment of the present invention may be characterized in that rotation of the swivel portion can be implemented in a clockwise direction and a counterclockwise direction.

The second-2 control mode of the working machine according to the embodiment of the present invention is characterized in that rotation of the swivel portion is realized by using the hydraulic oil supplied from the hydraulic pressure supply portion in the first control mode state to the control portion .

The control unit of the working machine according to the embodiment of the present invention may further include pressure reducing means for reducing the pressure of the working oil that realizes the rotation of the swivel unit in the 2-2 control mode state to a predetermined pressure amount, The predetermined amount of pressure can be adjusted.

The working machine according to an embodiment of the present invention may further include a rotation control operating unit capable of shutting off the rotation of the pivoting unit by the control unit in a state in which the control unit controls the rotation of the pivoting unit in the first control mode .

The rotation control operating portion of the working machine according to an embodiment of the present invention may include a first rotation control operating portion capable of shutting off the rotation of the swivel portion and a second rotation controlling portion that can block the rotation of the swivel portion, And a control operation unit.

The rotation control operating portion of the working machine according to the embodiment of the present invention can block the rotation of the swivel portion by using the hydraulic oil, and the first rotation control portion and the second rotation control portion are branched from one hydraulic line Is formed.

According to the working machine of the embodiment of the present invention, when the boom rotates and stops at a predetermined position, the phenomenon that the boom is shaken due to the back lash of the gear, the weight of the boom, inertia and the like can be alleviated.

Further, in the case of lifting the lifted object by the winch, if the vertical center position of the boom is not coincident with the vertical center position of the lifted object, the end of the boom can be rotationally moved in the direction of the vertical center position of the cargo without supplying the hydraulic pressure to the turning part .

1 is a schematic diagram of a conventional hydraulic circuit capable of rotating a swivel portion.
FIG. 2 to FIG. 7 are schematic hydraulic circuit diagrams that can rotate a turning part of a working machine according to an embodiment of the present invention. FIG.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

2 to 7 are schematic hydraulic circuit diagrams for rotating the swivel portion of a working machine according to an embodiment of the present invention.

FIGS. 2 to 7 are schematic views for explaining the turning operation of the swivel portion of the working machine according to the embodiment of the present invention, and show only exemplary configurations for explaining the concept of the present invention.

First, to define the direction, the clockwise direction may be a direction in which the second hand of the clock is rotated from an arbitrary point, and the counterclockwise direction may be a direction of rotation opposite to the clockwise direction.

The work machine according to an embodiment of the present invention includes a main body, a pivot portion rotatably connected to the main body and capable of supporting the boom, a control portion for controlling the rotation of the pivot portion in a predetermined control mode using hydraulic oil, And a hydraulic pressure supply unit for supplying the hydraulic oil to the control unit.

The body portion may be an apparatus for providing an area in which the swivel portion can be mounted so as to be rotatable.

For example, the body portion may be a traveling body such as a truck or a mobile crane, but is not limited thereto, and may refer to the body portion if it provides a region in which the pivot portion can be mounted.

The swivel portion may be rotatably mounted on the main body portion and may support the boom.

The swivel portion can support not only the boom but also other structures.

The pivot portion may be formed with a support portion for supporting the boom or the structure.

The boom or the structure may be connected to the support.

In addition, the pivot portion may be integrally formed with the boom or the structure.

As the pivot portion is rotated, the boom or the structure supported on the pivot portion can be rotated integrally with the pivot portion.

The control unit may be configured to control rotation of the swing unit in the predetermined control mode.

For example, the control unit may control the swivel unit to rotate clockwise or counterclockwise, and may control the swivel unit not to rotate.

That is, the control unit may be configured to control the rotational motion of the swivel unit.

For example, the control unit may control the rotation of the swivel unit using hydraulic oil.

The hydraulic pressure supply unit may supply the hydraulic oil to the control unit.

For example, the hydraulic pressure supply portion may be a hydraulic pump.

The predetermined control mode may include a first control mode in which the hydraulic oil for rotating the swivel portion is supplied from the hydraulic pressure supply portion to the control portion and a second control mode in which the hydraulic oil is not supplied to the control portion from the hydraulic pressure supply portion have.

For example, when the operator operates the lever or the switch to rotate the swivel portion, the hydraulic oil may be supplied from the hydraulic pressure supply portion to the control portion.

The first control mode may be a mode in which the control unit receives the hydraulic oil from the hydraulic pressure supply unit.

The control unit may control the swivel unit in the first control mode when the hydraulic oil is supplied from the hydraulic pressure supply unit.

For example, the first control mode may cause the pivot portion to be rotated clockwise or counterclockwise.

The second control mode may be a mode in which the control unit does not receive the hydraulic oil from the hydraulic pressure supply unit.

Here, the second control mode may include a 2-1 control mode that does not implement the rotation of the swivel portion, and a 2-2 control mode that implements the rotation of the swivel portion.

The 2-1 control mode and the 2-2 control mode may be a mode in which the control unit is not supplied with the hydraulic oil from the hydraulic pressure supply unit.

For example, the pivot portion may not be rotated in the second-first control mode.

Here, in the second-first control mode, the pivot portion is not rotated means that the pivot portion is completely stopped, but the movement of the pivot portion is not realized by the worker's backlash due to inertia and gear backlash It can be a concept that includes.

For example, the second-first control mode may be a mode in which the pivot portion is stopped because the hydraulic oil is not supplied to the control portion by the operator's operation in a state where the hydraulic oil is supplied to the control portion and the pivot portion is rotated.

For example, when the pivot portion is rotated from any first position to any second position due to the first control mode and is converted from the second position to the second-first control mode, 2 position.

For example, in the second-2 control mode, the swivel portion can rotate.

Here, the meaning of the rotation of the swivel part in the second-2 control mode is that, even if the operating oil is supplied to the control part and the operating oil is not supplied to the control part by the operation of the operator in a state where the swivel part is rotating, It may be a mode in which rotation is performed within a predetermined range, not just stopping.

For example, when the swivel portion is rotated from the first position to the second position due to the first control mode and is converted from the second position to the second-2 control mode, the swivel portion is moved to the second position But may be further rotated by inertia and then slowly stopped at any third position.

In the second-2 < nd > control mode, it is possible to mitigate the phenomenon that the boom is shaken due to the boom weight and inertia.

For example, the second-2 control mode may implement the rotation of the pivot portion in the clockwise direction and the counterclockwise direction.

That is, the second-2 control mode may be implemented such that the swivel portion is rotated in the clockwise direction from an arbitrary point, and the swivel portion is also rotated in the counterclockwise direction from an arbitrary point.

For example, the second-2 control mode may implement the rotation of the swivel portion using the hydraulic oil supplied from the hydraulic pressure supply portion in the first control mode state to the control portion.

In the second-2 control mode, the hydraulic oil is not supplied from the hydraulic pressure supply unit to the control unit. However, the rotary unit may be rotated using the hydraulic oil supplied to the control unit in the first control mode.

For example, the second-2 control mode may utilize inertia of the hydraulic fluid that is moved on the control unit in the first control mode state.

Alternatively, for example, the second-2 control mode may implement rotation of the swivel portion using inertia in which the swivel portion rotates in the first control mode.

For example, the control unit may include pressure reducing means for lowering the pressure of the hydraulic fluid that implements the rotation of the swing unit in the 2-2 control mode state to a predetermined pressure amount.

When the pressure of the operating oil is lowered by the pressure reducing means, the rotational range of the swivel portion in the second-2 control mode state can be reduced.

For example, the predetermined amount of pressure may be adjusted in accordance with the operator's choice.

The rotation range of the swivel portion in the second-2 control mode state can be adjusted according to the predetermined pressure amount.

The working machine according to an embodiment of the present invention may further include a rotation control operation portion capable of blocking the rotation of the turning portion by the control portion in a state in which the control portion controls the rotation of the turning portion in the first control mode have.

For example, the rotation control operating portion can stop the rotation of the swivel portion even in the first control mode state in which the hydraulic oil is supplied from the hydraulic pressure supply portion to the control portion.

For example, the rotation control operation unit can stop the rotation of the swivel unit even if the control unit controls the rotation of the swivel unit in the second-2 control mode.

For example, the rotation control operating portion may include a first rotation control operating portion capable of shutting off the rotation of the swivel portion, and a second rotation control operating portion capable of shutting off the rotation of the swivel portion regardless of the first rotation control operating portion.

The stop of the rotation of the pivot portion may be realized by the first rotation control operation portion or by the second rotation control operation portion.

For example, when the first rotation control portion fails. The rotation of the swivel portion can be stopped by the second rotation control operation portion.

For example, the rotation control operating portion can block the rotation of the swivel portion by using the hydraulic oil.

For example, the first rotation control operation portion and the second rotation control operation portion may be formed by branching from one hydraulic line.

Hereinafter, the predetermined control mode of the working machine according to the embodiment of the present invention will be described in more detail with reference to FIG. 2 to FIG.

The configurations described below are examples to facilitate understanding of the control unit and the predetermined control mode, and the technical idea of the present invention is not limited to the configurations described below.

2 and 3 are schematic hydraulic circuit diagrams for explaining the first control mode and the second-1 control mode.

The control unit may include first to ninth hydraulic lines L1 to L9, first to ninth valves V1 to V9, and a driving unit M, respectively.

The first to ninth hydraulic lines L1 to L9 may provide a path through which the hydraulic oil can be moved.

The first valve to the ninth valve (V1-V9) may control the flow of the hydraulic oil.

The driving unit M can implement the rotation of the swivel unit.

For example, the driving unit M may be a motor rotated by the operating oil.

For example, the driving unit M may be driven when the operating oil flows in and out, thereby rotating the swivel unit.

Hereinafter, the first control mode will be described.

Fig. 2 shows that the pivot portion is rotated in the clockwise direction in the first control mode.

As shown in FIG. 2, the hydraulic oil can be supplied to the first hydraulic line L1 from the hydraulic pressure supply portion through the first introduction portion K1.

The hydraulic fluid supplied to the first hydraulic line L1 may be transferred to the first valve V1 through the second hydraulic line L2.

The hydraulic fluid supplied to the first valve (V1) may be transferred to the third hydraulic line (L3) through the first valve (V1).

For example, the first valve (V1) may be a valve that controls the hydraulic fluid to move only in the direction from the second hydraulic line (L2) to the third hydraulic line (L3).

The hydraulic fluid supplied to the third hydraulic line L3 may flow into the driving unit M through the fourth hydraulic line L4.

The driving unit M can rotate the swivel unit in the clockwise direction by the flow of the hydraulic oil.

The hydraulic fluid flowing into the driving portion M may arrive at the fourth valve V4 through the fifth hydraulic line L5.

For example, the fourth valve V4 may be a valve that permits passage of the hydraulic fluid only when a predetermined pressure or more is applied.

Here, the hydraulic oil supplied to the first hydraulic line L1 is supplied to the fourth valve V4 via the seventh hydraulic line L7 branched from the first hydraulic line L1 by a predetermined pressure or more .

As a result, the hydraulic fluid reaching the fourth valve (V4) can be discharged to the tank through the fourth valve (V4) through the sixth hydraulic line (L6).

The circulation part can be rotated in the clockwise direction by circulation of the hydraulic oil.

Hereinafter, it will be described that the pivot portion is rotated in the counterclockwise direction in the first control mode.

As shown in FIG. 3, the hydraulic fluid can be supplied to the sixth hydraulic line L6 from the hydraulic pressure supply portion through the second introduction portion K2.

The hydraulic fluid supplied to the sixth hydraulic line L6 may be transferred to the second valve V2 through the ninth hydraulic line L9.

The hydraulic fluid supplied to the second valve V2 may be moved to the fifth hydraulic line L5 through the second valve V2.

For example, the second valve V2 may be a valve that controls the hydraulic fluid to move only in the direction from the ninth hydraulic line L9 to the fifth hydraulic line L5.

The hydraulic oil supplied to the fifth hydraulic line L5 may be introduced into the driving unit M.

With the flow of the operating fluid, the driving unit M can rotate the swivel unit in the counterclockwise direction.

The hydraulic fluid flowing into the driving portion M may reach the third valve V3 through the fourth hydraulic line L4.

For example, the third valve V3 may be a valve that permits passage of the hydraulic fluid only when a predetermined pressure or more is applied.

Here, the hydraulic fluid supplied to the sixth hydraulic line L6 is supplied to the third valve V3 via the eighth hydraulic line L8 branched from the sixth hydraulic line L6 by a predetermined pressure or more .

As a result, the hydraulic fluid reaching the third valve V3 can be discharged to the tank through the first hydraulic line L1 through the third valve V3.

The circulation unit may be rotated in the counterclockwise direction by circulation of the hydraulic oil.

Hereinafter, the second-1 control mode will be described.

For example, referring to FIG. 2, in the first control mode, the supply of the hydraulic oil from the hydraulic pressure supply unit to the first introduction unit (K1) may be stopped have.

In this case, since the hydraulic oil is not abnormally supplied to the first hydraulic line L1 and the seventh hydraulic line L7 from the fifth hydraulic line L5, The flow of the hydraulic fluid to the hydraulic line L6 is not allowed.

As a result, the flow of the hydraulic fluid on the control unit is stopped and the driving of the driving unit M can also be stopped.

The rotation of the swivel portion may be stopped as the driving of the driving portion M is stopped.

Hereinafter, the second-2 control mode will be described.

2 and 4, when the operating oil is supplied from the hydraulic pressure supply unit to the first introduction unit K1 through the first introduction unit K1, the swivel unit can be rotated in the clockwise direction .

At this time, when the hydraulic oil is not supplied from the hydraulic pressure supply part to the first introduction part K1 by the operator's selection, the hydraulic oil on the fifth hydraulic line L5 is branched from the fifth hydraulic line L5 Through the fifth hydraulic line (V5) and reach the sixth valve (V6).

Here, the fifth valve (V5) may be a valve that allows movement of the hydraulic fluid only in a direction from the fifth hydraulic line (L5) toward the sixth valve (V6).

The sixth valve V6 may be a valve capable of determining whether the hydraulic oil has passed or not by the operator's selection.

Here, when the sixth valve V6 allows passage of the hydraulic oil, the hydraulic oil may reach the seventh valve V7 through the sixth valve V6.

The operating fluid that has reached the seventh valve (V7) can reach the fourth hydraulic line (L4) through the seventh valve (V7).

Here, for example, the seventh valve V7 may be a valve that permits passage of only the hydraulic oil having a pressure equal to or higher than a predetermined pressure.

For example, the pressure of the working oil may be lowered by the resistance of the seventh valve V7 while passing through the seventh valve V7.

For example, the seventh valve V7 may correspond to the pressure reducing means.

For example, the predetermined amount of pressure may be adjusted according to the type and shape of the seventh valve V7.

The hydraulic fluid that has passed through the seventh valve V7 and reaches the fourth hydraulic line L4 may be introduced into the driving portion M and may pass through the fifth hydraulic line L5, (V5).

That is, the hydraulic oil is supplied from the fifth hydraulic line L5 to the fifth valve V5, the sixth valve V6, the seventh valve V7, the fourth hydraulic line L4, M to the fifth hydraulic line L5.

As a result, even if the operating oil is not supplied from the hydraulic pressure supply unit to the control unit, the swivel unit can be rotated without being immediately stopped by the inertia of the swivel unit or the driving unit (M) or the hydraulic oil.

Hereinafter, it will be described that the swivel portion is rotated counterclockwise in the second-2 < nd > control mode.

3 and 5, when the hydraulic oil is supplied from the hydraulic pressure supply unit to the second introduction unit K2 via the second introduction unit K2, the swivel unit can be rotated in the counterclockwise direction have.

At this time, when the supply of the hydraulic oil to the second introduction portion K2 is stopped by the operator's choice, the hydraulic oil on the fourth hydraulic line L4, which is introduced from the hydraulic pressure supply portion in the first control mode, And can reach the sixth valve (V6) through the eighth valve (V8) through the hydraulic line branched from the fourth hydraulic line (L4).

Here, the eighth valve (V8) may be a valve that allows movement of the hydraulic fluid only in a direction from the fourth hydraulic line (L4) toward the sixth valve (V6).

According to the operator's choice, when the sixth valve V6 allows passage of the hydraulic oil, the hydraulic oil can reach the ninth valve V9 through the sixth valve V6.

The hydraulic fluid reaching the ninth valve (V9) can reach the fifth hydraulic line (L5) through the ninth valve (V9).

Here, for example, the ninth valve V9 may be a valve that permits passage of only the hydraulic oil having a pressure equal to or higher than a predetermined pressure.

For example, the pressure of the operating fluid may be lowered by the resistance of the ninth valve (V9) while passing through the ninth valve (V9).

For example, the ninth valve V9 may correspond to the pressure reducing means.

For example, the predetermined amount of pressure may be adjusted according to the type and shape of the ninth valve V9.

The hydraulic fluid that has passed through the ninth valve V9 and has reached the fifth hydraulic line L5 may be introduced into the driving portion M and may pass through the fourth hydraulic line L4, (V8).

That is, the hydraulic oil is supplied from the fourth hydraulic line L4 to the eighth valve V8, the sixth valve V6, the ninth valve V9, the fifth hydraulic line L5, M to the fourth hydraulic line L4.

As a result, the swivel portion can be rotated without being immediately stopped by inertia of the swivel portion or the driving portion (M) or the hydraulic oil even if the hydraulic oil is not supplied from the hydraulic pressure supply portion to the control portion.

The seventh valve (V7) and the eighth valve (V8) may be arranged in parallel, and the fifth valve (V5) and the ninth valve (V9) may be arranged in parallel.

For example, the second-2 control mode may be implemented by omitting the fifth valve V5, the seventh valve V7, the eighth valve V8, and the ninth valve V9.

When the sixth valve V6 permits passage of the hydraulic oil, the hydraulic oil passes through the sixth valve V6 from the fifth hydraulic line L5 to the fourth hydraulic line L4 by inertia, Or may be moved from the fourth hydraulic line L4 through the sixth valve V6 to the fifth hydraulic line L5 by inertia.

In this case, the pressure reducing means may correspond to the fourth hydraulic line L4 and the fifth hydraulic line L5.

The hydraulic oil is moved on the fourth hydraulic line L4 and the fifth hydraulic line L5 and friction occurs with the inner surfaces of the fourth hydraulic line L4 and the fifth hydraulic line L5 .

The second-2 control mode may implement the rotation of the swivel portion by circulation of the hydraulic oil already supplied on the control portion in the first control mode even if the hydraulic oil is not supplied from the hydraulic pressure supply portion to the control portion .

It is obvious that the control unit can be variously changed from the viewpoint of a person skilled in the art if it is a configuration capable of implementing the second-2 control mode.

For example, the control unit does not need to receive the supply of the hydraulic oil from the hydraulic pressure supply unit in order to match the vertical center position of the boom with the end of the boom when the vertical center position of the boom is disagreed with the end of the boom .

When the boom lifts the cargo, force is applied to the swivel portion to rotate in the vertical center position of the cargo.

In this case, when the control unit is in the second-2 control mode, the driving unit M can be rotated by a force applied to the swivel unit, Can be circulated.

Accordingly, the control unit can rotate the swivel unit to move the boom to the vertical center position of the pay-off water without receiving the supply of the operating oil from the hydraulic pressure supply unit.

6 and 7 are views showing the rotation control operating portion in detail.

6 and 7, the rotation control operating portion includes a tenth hydraulic line to a thirteenth hydraulic line L10-L13, a tenth valve V10, an eleventh valve V11, and a brake C .

The tenth hydraulic line through the thirteenth hydraulic line L10 through L13 may provide a passage through which the hydraulic oil can be moved.

The tenth valve V10 and the eleventh valve V11 may control the flow of the hydraulic fluid.

The brake C may block the rotation of the swivel portion.

For example, the brake C interrupts the driving of the driving unit M to cut off the rotation of the swivel unit, or mechanically contacts the swivel unit to interrupt the rotation of the swivel unit.

It is obvious that the brake C can be variously changed in the viewpoint of a person skilled in the art if the structure can stop the rotation of the swivel part.

When the hydraulic oil is supplied from the hydraulic pressure supply part to the tenth hydraulic line L10 through the third introduction part K3, the hydraulic oil can reach the tenth valve V10 and the eleventh valve V11 have.

The tenth valve (V10) and the eleventh valve (V11) can pass the hydraulic oil by the operator's choice.

Here, the tenth valve (V10) may correspond to the first rotation control operating portion, and the eleventh valve (V11) may correspond to the second rotation control portion.

When at least one of the tenth valve V10 or the eleventh valve V11 permits passage of the hydraulic oil, the hydraulic oil passes through the eleventh hydraulic line L11 and flows into the brake C .

For example, when the hydraulic oil flows into the brake C, the brake C may not interrupt the rotation of the swivel portion.

On the other hand, when neither the tenth valve V10 nor the eleventh valve V11 allows passage of the hydraulic oil, the hydraulic oil may not reach the brake C.

As a result, the brake C can interrupt the rotation of the swivel portion.

For example, the tenth valve V10 and the eleventh valve V11 may be arranged in parallel from the tenth hydraulic line L10.

For example, the eleventh valve (V11) may be disposed on the twelfth hydraulic line (L12) and the thirteenth hydraulic line (L13) which are branched from the tenth hydraulic line (L10).

For example, when the hydraulic fluid is not supplied to the brake C, the swivel portion may not be rotated even in the first control mode or the second-2 control mode state.

For example, the hydraulic pressure supply unit may supply the hydraulic oil to the first inlet K1, supply the hydraulic oil to the second inlet K2, supply the hydraulic oil to the third inlet K3, Or may supply the working flow from the one hydraulic pressure supply part to the first introduction part K1 to the third introduction part K3, respectively.

The hydraulic pressure is supplied from the hydraulic pressure supply unit to the first introduction unit K1, the hydraulic pressure is supplied from the hydraulic pressure supply unit to the second introduction unit K2, the third introduction unit K3 is supplied from the hydraulic pressure supply unit, Or at least one of supplying the hydraulic pressure to the hydraulic control unit may be implemented by the operator's selection or automatic input control.

For example, the sixth valve V6 allows passage of the hydraulic oil, the tenth valve V10 permits passage of the hydraulic oil, the eleventh valve V11 passes through the hydraulic oil At least one of the permits may be implemented by operator selection or automatic input control.

The automatic control unit may be configured to control the control unit based on data such as the working environment, the weight of the cargo or the distance to which the cargo is to be moved.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that such modifications or variations are within the scope of the appended claims.

K1: First introduction
K2:
L1: 1st hydraulic line
V1: first valve
M:

Claims (7)

A body portion;
A swivel portion rotatably connected to the main body portion and capable of supporting the boom;
A control unit for controlling the rotation of the swivel unit to a predetermined control mode using hydraulic oil; And
And a hydraulic pressure supply unit for supplying the hydraulic oil to the control unit,
The predetermined control mode includes:
And a second control mode in which the hydraulic oil is supplied from the hydraulic pressure supply unit to the control unit,
Wherein the second control mode includes:
A 2-1 control mode in which rotation of the swivel portion is not realized, and a 2-2 control mode in which rotation of the swivel portion is implemented,
In the second-2 control mode,
Wherein the rotation of the swivel portion is implemented in a clockwise direction and a counterclockwise direction using circulation of the hydraulic oil already supplied from the hydraulic pressure supply portion to the control portion through the first control mode,
Wherein,
In the second-2 < nd > control mode, the pressure of the circulating hydraulic oil is lowered,
And a pressure reducing means for reducing a rotation range of the swivel portion.
delete delete delete The method according to claim 1,
In a state in which the control unit controls the rotation of the swivel unit in the first control mode,
Further comprising: a rotation control operation unit operable to interrupt rotation of the pivot unit by the control unit.
6. The method of claim 5,
The rotation control operation unit,
A first rotation control operating portion capable of blocking rotation of the pivot portion
And a second rotation control operating portion capable of shutting off rotation of the swivel portion regardless of the first rotation control operating portion.
The method according to claim 6,
The rotation control operation unit may determine whether the rotation unit is blocked by using the hydraulic oil,
Wherein the first rotation control operation portion and the second rotation control operation portion are formed by branching from one hydraulic line.

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