WO2019146957A1 - Mécanisme de direction hydraulique pour véhicule agricole - Google Patents

Mécanisme de direction hydraulique pour véhicule agricole Download PDF

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Publication number
WO2019146957A1
WO2019146957A1 PCT/KR2019/000682 KR2019000682W WO2019146957A1 WO 2019146957 A1 WO2019146957 A1 WO 2019146957A1 KR 2019000682 W KR2019000682 W KR 2019000682W WO 2019146957 A1 WO2019146957 A1 WO 2019146957A1
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WO
WIPO (PCT)
Prior art keywords
steering
automatic
manual
working fluid
line
Prior art date
Application number
PCT/KR2019/000682
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English (en)
Korean (ko)
Inventor
이상헌
Original Assignee
엘에스엠트론 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020190005197A external-priority patent/KR20190089736A/ko
Application filed by 엘에스엠트론 주식회사 filed Critical 엘에스엠트론 주식회사
Publication of WO2019146957A1 publication Critical patent/WO2019146957A1/fr

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B69/00—Steering of agricultural machines or implements; Guiding agricultural machines or implements on a desired track
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle

Definitions

  • the present invention relates to an agricultural working vehicle used for growing crops necessary for human life by using land.
  • Agricultural working vehicles are used to cultivate the crops needed for human life by using land.
  • combine, tractor, and rice plant are the agricultural working vehicles.
  • the combine is to perform the task of taking the crops such as rice, barley, wheat,
  • the tractor performs the work necessary to grow the crop using the traction force.
  • the rice paddy is to carry out the work of transplanting to the paddy field from the nursery or the nursery box.
  • the agricultural working vehicle includes a steering device for changing the running direction as required in the course of work.
  • the steering apparatus changes the running direction by changing the direction of the wheels provided in the agricultural working vehicle.
  • FIG. 1 is a schematic block diagram of a steering apparatus for an agricultural work vehicle according to the prior art.
  • the steering apparatus 10 of the agricultural working vehicle includes a steering pump 11 and a steering control unit 12.
  • the steering pump 11 supplies a working fluid to the steering control unit 12.
  • the steering pump 11 can transfer a working fluid using a driving force generated by an engine (not shown) of an agricultural working vehicle.
  • the working fluid is stored in a storage tank (not shown) of the agricultural working vehicle.
  • the steering control unit 12 is connected to the steering pump 11 and the steering cylinder 13.
  • the steering cylinder 13 changes the direction of the wheels provided in the agricultural working vehicle.
  • the steering control unit 12 supplies the working fluid supplied from the steering pump 11 to one of the first cylinder 131 and the second cylinder 132 of the steering cylinder 13. In this case, the steering control unit 12 discharges the working fluid from the remaining cylinders. Accordingly, the steering control unit 12 changes the direction of the wheel by adjusting the moving direction of the cylinder rod (not shown) of the cylinders 131 and 132, thereby changing the traveling direction of the agricultural working vehicle .
  • the steering control unit 12 includes a manual steering unit 121 and an automatic steering unit 122.
  • the manual steering unit 121 is connected to the steering pump 11.
  • the manual steering unit 121 moves the working fluid supplied from the steering pump 11 to the first cylinder 131 or the second cylinder 131 according to the rotational direction of the steering wheel.
  • the second cylinder (132) That is, the manual steering unit 121 changes the running direction of the agricultural working vehicle according to the manual steering of the driver.
  • the automatic steering unit 122 is connected to the steering pump 11.
  • the automatic steering unit 122 supplies the working fluid supplied from the steering pump 11 to the first cylinder 131 or the second cylinder 132 under the control of the control unit 14.
  • the control unit 14 controls the automatic steering unit 122 so that the agricultural working vehicle travels along a predetermined traveling route. That is, the automatic steering unit 122 changes the traveling direction of the agricultural working vehicle according to the automatic steering of the control unit 14.
  • the steering apparatus 10 for the agricultural work vehicle according to the related art is configured such that when a change occurs in the working conditions such as the occurrence of an unexpected obstacle in a predetermined traveling route while the running direction of the agricultural working vehicle is changed by the automatic steering, Is maintained by the automatic steering without switching to the manual steering even if the steering wheel is operated. Accordingly, there is a problem that the steering apparatus 10 of the agricultural work vehicle according to the prior art has a reduced ability to cope with a change in working conditions.
  • the present invention can include the following configuration.
  • a hydraulic steering apparatus for an agricultural working vehicle comprises a steering pump for supplying a working fluid;
  • a manual steering unit connected to the steering pump and changing the running direction of the agricultural working vehicle using the working fluid supplied from the steering pump as the manual steering is performed by the operation of the steering wheel;
  • An automatic steering unit that changes the traveling direction of the agricultural working vehicle using the working fluid supplied from the steering pump as the automatic steering is performed by the control unit;
  • a manual priority switching unit connected to each of the steering pump and the automatic steering unit so that a working fluid supplied from the steering pump is selectively supplied to the automatic steering unit depending on whether or not the manual steering is performed;
  • An external discharge line for discharging the working fluid supplied from the steering pump to an external device;
  • a steering priority unit connected to each of the steering pump and the external discharge line so that the working fluid supplied from the steering pump is selectively discharged to the external discharge line.
  • the manual priority switching unit passes the working fluid supplied from the steering pump so that the working fluid supplied from the steering pump is supplied to the automatic steering unit when the manual steering is not performed, It is possible to prevent the working fluid supplied from the pump from being supplied to the automatic steering unit.
  • the steering priority unit may block the working fluid supplied from the steering pump from being discharged to the external discharge line when either the manual steering or the automatic steering is performed.
  • a hydraulic steering apparatus for an agricultural working vehicle comprises a steering pump for supplying a working fluid; A manual steering unit connected to the steering pump and changing the running direction of the agricultural working vehicle using the working fluid supplied from the steering pump as the manual steering is performed by the operation of the steering wheel; An automatic steering unit that changes the traveling direction of the agricultural working vehicle using the working fluid supplied from the steering pump as the automatic steering is performed by the control unit; And a manual priority switching unit connected to each of the steering pump and the automatic steering unit such that the working fluid supplied from the steering pump is selectively supplied to the automatic steering unit depending on whether or not the manual steering is performed.
  • the manual priority switching unit passes the working fluid supplied from the steering pump so that the working fluid supplied from the steering pump is supplied to the automatic steering unit when the manual steering is not performed, It is possible to prevent the working fluid supplied from the pump from being supplied to the automatic steering unit.
  • the manual steering unit may include a first manual connecting line connected to the first cylinder of the steering cylinder of the agricultural work vehicle and a second manual connecting line connected to the second cylinder of the steering cylinder.
  • the automatic steering unit may include a first automatic connection line connected to the first cylinder and a second automatic connection line connected to the second cylinder. The first manual connecting line and the first automatic connecting line may be connected to the first cylinder through a first steering line connected to the first cylinder.
  • the second manual connection line and the second automatic connection line may be connected to the second cylinder through a second steering line connected to the second cylinder.
  • the automatic steering unit includes a first automatic connecting line for passing a working fluid supplied to the first cylinder through the first automatic connecting line and for interrupting a working fluid supplied from the first manual connecting line, 1 automatic check valve; A second automatic check valve installed in the second automatic connection line for passing a working fluid supplied to the second cylinder through the second automatic connection line and for blocking a working fluid supplied from the second manual connection line; And a second automatic check valve that opens the second automatic check valve using a working fluid supplied to the first cylinder through the first automatic connecting line so that the working fluid discharged from the second cylinder flows through the second automatic check valve Automatic opening line; And a valve for opening the first automatic check valve using a working fluid supplied to the second cylinder through the second automatic connection line so that the working fluid discharged from the first cylinder passes through the first automatic check valve 2 automatic open lines.
  • the running direction is changed according to the manual steering, thereby improving the responsiveness to the change of the working conditions and reducing the risk of the safety accident.
  • FIG. 1 is a schematic block diagram of a steering apparatus for an agricultural work vehicle according to the prior art
  • FIG. 2 is a schematic block diagram of an agricultural working vehicle equipped with a steering apparatus for an agricultural working vehicle according to the present invention
  • 3 to 16 are schematic hydraulic circuit diagrams showing the flow direction of the working fluid in the agricultural working vehicle according to the present invention.
  • 17 and 18 are schematic block diagrams of a steering apparatus for an agricultural working vehicle according to the present invention.
  • the direction of flow of the working fluid is indicated by an arrow.
  • the solid arrow in the hydraulic line of the solid line indicates the flow direction of the working fluid supplied from the steering pump or the working fluid supplied to the steering cylinder.
  • the dotted arrow in the hydraulic line of the solid line indicates the flow direction of the working fluid discharged from the steering cylinder.
  • the dotted arrow in the hydraulic line of the dotted line indicates the flow direction of the working fluid for moving the valve or the working fluid for opening the check valve.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention is provided in an agricultural work vehicle 100 such as a tractor, a combine, a weed and the like.
  • the agricultural working vehicle 100 includes a traveling part 110 for traveling and a steering cylinder 120 for changing the traveling direction.
  • the steering cylinder 120 changes the direction in which the wheels 111 and 111 'of the traveling unit 110 are directed to change the traveling direction of the agricultural working vehicle 100 Can be changed.
  • the steering cylinder 120 operates hydraulically using a working fluid.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention is responsible for changing the running direction by regulating the supply and discharge of working fluid to the steering cylinder 120.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention can change the traveling direction through manual steering by the operation of a steering wheel (not shown) and automatic steering by a predetermined traveling route.
  • the manual steering may be performed by a driver aboard the agricultural work vehicle 100.
  • the automatic steering may be performed by the control unit 130 of the agricultural work vehicle 100.
  • the control unit 130 may store a traveling route according to working conditions and the like.
  • the hydraulic steering apparatus (1) of the agricultural working vehicle includes a steering pump (2) for supplying operating fluid, And a steering control unit (30) for changing the running direction using the working fluid supplied from the steering wheel.
  • the steering control unit (30) includes a manual priority switching unit (3) for giving priority to the manual steering among the automatic steering and the manual steering, a manual steering unit (4) for changing the driving direction according to the manual steering, And an automatic steering unit 5 for changing the running direction in accordance with the automatic steering.
  • the manual steering unit 4 is connected to the steering pump 2.
  • the manual steering unit 4 changes the traveling direction using the working fluid supplied from the steering pump 2 as the manual steering is performed.
  • the automatic steering unit 5 changes the traveling direction using the working fluid supplied from the steering pump 2 as the automatic steering is performed. In this case, the automatic steering unit 5 changes the traveling direction using the working fluid passing through the manual priority switching unit 3.
  • the manual priority switching unit 3 is configured to switch the steering pump 2 and the automatic steering unit 5 such that the operating fluid supplied from the steering pump 3 is selectively supplied to the automatic steering unit 5 depending on whether the manual steering is performed or not. And is connected to each of the automatic steering units 5.
  • the manual priority switching unit 3 changes the running direction according to the automatic steering if the manual steering is not performed, and changes the running direction according to the manual steering when the manual provision is made.
  • the manual priority switching unit 3 switches the traveling direction to change according to the manual steering. That is, the manual priority switching unit 3 is implemented such that the manual steering takes priority among the automatic steering and the manual steering.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention when a change occurs in the working condition such as the occurrence of an unexpected obstacle in the predetermined traveling route according to the automatic steering, So that the automatic steering is switched to the manual steering only by the operation. Therefore, the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention can improve the response to changes in the working conditions, thereby reducing the risk of occurrence of safety accidents.
  • the steering pump 2 supplies working fluid.
  • the steering pump 2 may be connected to the manual steering unit 4 and the manual priority switching unit 3, respectively.
  • the steering pump 2 may be connected to the automatic steering unit 5 through the manual priority switching unit 3.
  • the steering pump 2 may be supplied to the manual steering unit 4 via a supply line 21 and a manual branch line 22.
  • the steering pump 2 may be supplied to the manual priority switching unit 3 via the supply line 21 and the automatic branch line 23.
  • the manual branch line (22) and the automatic branch line (23) are branched from the supply line (21).
  • the supply line 21, the manual branch line 22, and the automatic branch line 23 may be implemented in a tubular structure such as a hose, a pipe, and the like.
  • the supply line 21, the manual branch line 22 and the automatic branch line 23 are each formed in a channel structure in which a groove (groove), a hole, or the like is processed inside a structure (not shown) .
  • the supply line 21, the manual branch line 22, and the automatic branch line 23 may be implemented in a combination of the tube structure and the channel structure, respectively. That is, the supply line 21, the manual branch line 22, and the automatic branch line 23 may be implemented in a combination of the tube structure, the channel structure, or the tube structure and the channel structure, respectively .
  • the structure corresponding to the line providing the passageway through which the working fluid can flow is the combination of the tube structure, the passage structure or the tube structure and the passage structure As shown in FIG.
  • the steering pump 2 can operate using the driving force generated by an engine (not shown) of the agricultural work vehicle 100.
  • the steering pump 2 may be connected to a tank (not shown) in which the working fluid is stored and to the manual steering unit 4, respectively.
  • the working fluid may be oil.
  • the steering control unit 30 includes the manual priority switching unit 3, the manual steering unit 4, and the automatic steering unit 5.
  • the manual priority switching unit 3 is connected to the steering pump 2 and the automatic steering unit 5, respectively.
  • the manual priority switching unit 3 may be connected to the steering pump 2 on one side and to the automatic steering unit 5 on the other side. Accordingly, the working fluid can be supplied from the steering pump 2 to the automatic steering unit 5 via the manual priority switching unit 3.
  • the manual priority switching unit 3 can selectively supply the operating fluid supplied from the steering pump 2 to the automatic steering unit 5 depending on whether the manual steering is performed or not. In this case, the manual priority switching unit 3 changes the running direction according to the automatic steering if the manual steering is not performed, and changes the running direction according to the manual steering when the manual steering is performed . If the manual steering is performed while the automatic steering is performed, the manual priority switching unit 3 may be switched to change the driving direction according to the manual steering. In other words, the manual priority switching unit 3 can be implemented such that the manual steering is given priority among the automatic steering and the manual steering. Therefore, the manual priority switching unit 3 can improve the responsiveness to the change of the working condition such as the occurrence of the unexpected obstacle in the predetermined traveling route according to the automatic steering, thereby lowering the risk of the safety accident .
  • the manual priority switching unit 3 allows the working fluid supplied from the steering pump 2 to pass therethrough. Accordingly, the manual priority switching unit 3 can allow the working fluid supplied from the steering pump 2 to be supplied to the automatic steering unit 5. [ Therefore, the automatic steering unit 5 can change the running direction according to the automatic steering using the working fluid passing through the manual priority switching unit 3. [ In this case, the automatic steering unit 5 may change the running direction under the control of the control unit 130. [
  • the manual priority switching unit 3 does not pass the working fluid supplied from the steering pump 2.
  • the manual priority switching unit 3 can block the working fluid supplied from the steering pump 2 from being supplied to the automatic steering unit 5.
  • the manual priority switching unit 4 can switch the automatic steering to the manual steering by not supplying the operating fluid to the automatic steering unit 5.
  • the operating fluid is not supplied to the automatic steering unit 5 even if the controller 130 controls the automatic steering unit 5, the automatic steering is not performed.
  • the manual priority switching unit 3 may be connected to the automatic branch line 23, thereby being connected to the steering pump 2.
  • the working fluid supplied from the steering pump 2 can flow through the automatic branch line 23.
  • the manual priority switching unit 3 may be connected to the automatic steering unit 5 via an automatic supply line 3a.
  • the operating fluid can be supplied from the automatic branch line 23 to the automatic steering unit 5 through the automatic supply line 3a via the manual priority switching unit 3 when the manual steering is not performed have.
  • the manual priority switching unit 3 may include a manual priority switching valve 31.
  • the manual priority switching valve (31) moves to selectively pass the working fluid supplied from the steering pump (2). Specifically, it is as follows.
  • the manual priority switching valve 31 can be moved to allow the working fluid supplied from the steering pump 2 to be supplied to the automatic steering unit 5 as shown in Fig.
  • the manual priority switching valve 31 allows the working fluid supplied from the steering pump 2 to be supplied to the automatic steering unit 5. Therefore, the automatic steering can be switched to a state in which the automatic steering can be performed.
  • the manual priority switching valve 31 can be moved so as to block the working fluid supplied from the steering pump 2 from being supplied to the automatic steering unit 5.
  • the manual priority switching valve 31 blocks the working fluid supplied from the steering pump 2, thereby preventing the working fluid from being supplied to the automatic steering unit 5. [ Therefore, the automatic steering can be switched to a state in which the automatic steering can not be performed. In this case, the manual steering can be performed.
  • the manual priority switching valve 31 can selectively pass the working fluid supplied from the steering pump 2 by moving in the directions opposite to each other on one axis. Referring to FIGS. 3 to 5, the manual priority switching valve 31 can pass the working fluid by moving to the left, and can block the working fluid by moving to the right.
  • the manual priority switching valve 31 can be moved to selectively pass the working fluid supplied from the steering pump 2 depending on whether the manual steering is performed or not.
  • the manual priority switching valve 31 may be configured to move using the working fluid. Specifically, it is as follows.
  • the manual priority switching valve 31 is connected to the operating fluid supplied from the steering pump 2 using the working fluid supplied from the steering pump 2 to the automatic steering unit 5, To be supplied to the automatic steering unit (5). Accordingly, since the operating fluid is supplied to the automatic steering unit 5, the automatic steering unit 5 is switched to a state in which the automatic steering can be performed.
  • the working fluid to be supplied from the steering pump 2 to the automatic steering unit 5 can be used to pressurize and move the manual priority switching valve 31.
  • the manual priority switching unit 3 may include an inlet line 3b connected to the automatic branch line 23 and an automatic switching line 3c connected to the inlet line 3b.
  • the working fluid supplied by the steering pump 2 is supplied to the automatic branch line 23 through the supply line 21.
  • the manual priority switching valve 31 is moved to allow the working fluid to be supplied from the inflow line 3b to the automatic steering unit 5.
  • the manual priority switching valve 31 can be moved to the left by the working fluid supplied to the automatic switching line 3c. Therefore, the working fluid supplied to the inflow line 3b may be supplied to the automatic steering unit 5 through the automatic supply line 3a after passing through the manual priority switching valve 31.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention when the manual steering is not performed, the working fluid for supplying the automatic steering unit 5 from the steering pump 2
  • the manual priority switching valve 31 can be moved so that the working fluid supplied from the steering pump 2 is supplied to the automatic steering unit 5.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention can be switched to a state in which the automatic steering can be performed only by not performing the manual steering without any additional operation. In this case, part of the working fluid supplied by the steering pump 2 is supplied to the manual steering unit 4, so that the manual steering can be performed as the driver operates the steering wheel.
  • the manual priority switching valve 31 is connected to the steering cylinder 120 through the manual steering unit 4, So as to block the working fluid from being supplied to the automatic steering unit 5.
  • the working fluid supplied from the manual steering unit 4 to the steering cylinder 120 may be used to pressurize and move the manual priority switching valve 31.
  • the manual priority switching unit 3 may include a manual priority switching line 32.
  • One side of the manual priority switching line 32 may be connected to the manual steering unit 4 and the other side may be connected to the manual priority switching valve 31.
  • the working fluid branched from the working fluid supplied to the steering cylinder 120 flows according to the manual steering.
  • the flow of the working fluid supplied by the steering pump 2 is as follows.
  • the working fluid supplied by the steering pump 2 is supplied through the supply line 21 and then branched to the manual branch line 22 and the automatic branch line 23, respectively.
  • the working fluid branched to the manual branching line 22 is supplied to the manual steering unit 4 through the manual branching line 22.
  • the working fluid supplied to the manual steering unit 4 is supplied to the steering cylinder 120.
  • a part of the working fluid supplied from the manual steering unit 4 to the steering cylinder 120 is branched and supplied to the manual priority switching line 32.
  • the working fluid flowing through the manual priority switching line 32 flows toward the manual priority switching valve 31 and then pressurizes the manual priority switching valve 31.
  • the manual priority switching valve 31 is moved so as to block the working fluid from being supplied to the automatic steering unit 5 from the inflow line 3b.
  • the manual priority switching valve 31 can be moved to the right by the working fluid supplied to the manual priority switching line 32.
  • the manual priority switching valve 31 can be moved to the right by the elastic force of the spring and the pressing force of the working fluid supplied to the manual priority switching line 32. Therefore, the working fluid supplied to the inflow line 3b can not be supplied to the automatic steering unit 5 because the working fluid can not pass through the manual priority switching valve 31.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention when the manual steering is performed, the operating fluid supplied to the steering cylinder 120 in accordance with the manual steering, The manual priority switching valve 31 can be moved so that the working fluid is not supplied to the manual valve 5. Therefore, the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention is implemented such that the steering is switched from the automatic steering to the manual steering only by operating the steering handle, and the automatic steering is switched to a state in which the automatic steering can not be performed .
  • the manual priority switching valve 31 may include a first switching mechanism 311 and a second switching mechanism 312.
  • the first switching mechanism 311 blocks the working fluid. If the first switching mechanism 311 is connected to the inflow line 3b and the automatic supply line 3a as the manual priority switching valve 31 moves, So that the working fluid can not be supplied to the automatic supply line 3a from the line 3b.
  • the second switching mechanism (312) allows the working fluid to pass.
  • the second switching mechanism 312 may include a flow path connected to the inflow line 3b and the automatic supply line 3a, respectively.
  • the second switching mechanism 312 and the first switching mechanism 311 may be arranged side by side with respect to the axial direction in which the manual priority switching valve 31 moves. 3 to 5, the second switching mechanism 312 may be disposed on the right side with respect to the first switching mechanism 311.
  • the manual steering unit 4 changes the running direction as the manual steering is performed.
  • the manual steering unit 4 may be connected to the steering pump 2.
  • the manual steering unit 4 may be connected to the steering pump 2 via the manual branch line 22 and the supply line 21.
  • the manual steering unit 4 may be connected to the steering cylinder 120.
  • the manual steering unit 4 may be connected to the steering cylinder 120 through a steering line 140.
  • the steering cylinder 120 may include a first cylinder 120a and a second cylinder 120b.
  • the first cylinder 120a and the second cylinder 120b can change the direction in which the different wheels 111 and 111 'are directed by using the working fluid, respectively.
  • the first cylinder 120a and the second cylinder 120b may be operated to rotate the wheels 111 and 111 'in the same rotational direction, respectively.
  • the first cylinder 120a and the second cylinder 120b may be disposed to face each other. In this case, as shown in FIG.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention supplies the working fluid to the first cylinder 120a in accordance with the direction in which the manual steering is performed, The working fluid can be discharged from the cylinder 120b.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention discharges working fluid from the first cylinder 120a in accordance with the direction in which the manual steering is performed, 120b.
  • the manual steering unit 4 may include a first manual connecting line 41 and a second manual connecting line 42.
  • the first manual connecting line 41 is connected to the first cylinder 120a.
  • the second manual connecting line 42 is connected to the second cylinder 120b.
  • the working fluid may flow in the first manual connecting line 41 and the second manual connecting line 42 according to the manual steering. When the manual steering is not performed, the working fluid does not flow in the first manual connecting line 41 and the second manual connecting line 42.
  • the manual steering unit 4 may be connected to the first cylinder 120a through the first manual connecting line 41.
  • the first manual connecting line 41 may be connected to the first steering line 140a connected to the first cylinder 120a.
  • One side of the first steering line 140a may be connected to the first manual connecting line 41 and the other side of the first steering line 140a may be connected to the first cylinder 120a.
  • the manual steering unit 4 may be connected to the second cylinder 120b through the second manual connecting line 42.
  • the second manual connection line 42 may be connected to the second steering line 140b connected to the second cylinder 120b.
  • One side of the second steering line 140b may be connected to the second manual connecting line 42 and the other side thereof may be connected to the second cylinder 120b.
  • the manual steering unit 4 supplies the working fluid to any one of the first cylinder 120a and the second cylinder 120b and operates from the other one cylinder The fluid can be discharged.
  • the manual steering unit 4 may include a manual steering valve 43.
  • the manual steering valve 43 is moved in accordance with the manual steering.
  • the manual steering valve 43 can move as the steering wheel rotates.
  • the manual steering valve 43 can be moved to change the flow path of the working fluid supplied from the steering pump 2 in accordance with the manual steering. Specifically, it is as follows.
  • the manual steering valve 43 can move so as not to pass the working fluid supplied from the steering pump 2.
  • the manual steering valve 43 is operated by the operation supplied from the steering pump 2 as the steering wheel rotates And to supply fluid to the first passive connection line (41).
  • the working fluid supplied to the first manual connecting line 41 may be supplied to the first cylinder 120a through the first steering line 140a.
  • a portion of the working fluid supplied to the first cylinder 120a may be manually operated by moving the manual priority switching valve 31 (shown in Figure 3) through the manual priority switching line 32, .
  • the manual steering valve 43 may discharge the working fluid discharged from the second cylinder 120b to the manual discharge line 4a.
  • the working fluid discharged from the second cylinder 120b is supplied to the manual steering valve 43 through the second steering line 140b and the second manual connecting line 42, Can be discharged to the manual discharge line (4a) by the steering valve (43).
  • the working fluid discharged through the manual discharge line (4a) can be discharged to the external device (200).
  • the external device 200 is provided in the agricultural work vehicle 100 and may be operated using a working fluid.
  • the external device 200 may be a transmission.
  • the external device 200 may be a storage tank for storing a working fluid.
  • the manual steering valve 43 when the manual steering is performed to change the running direction to a second direction opposite to the first direction, the manual steering valve 43 is operated to change the steering direction Can be moved to supply the working fluid supplied from the pump (2) to the second manual connecting line (42).
  • the working fluid supplied to the second manual connecting line 42 may be supplied to the second cylinder 120b through the second steering line 140b.
  • a portion of the working fluid supplied to the second cylinder 120b may be manually operated by moving the manual priority switching valve 31 (shown in Figure 5) through the manual priority switching line 32, .
  • the manual steering valve 43 may discharge the working fluid discharged from the first cylinder 120a to the manual discharge line 4a.
  • the working fluid discharged from the first cylinder 120a is supplied to the manual steering valve 43 through the first steering line 140a and the first manual connecting line 41, Can be discharged to the manual discharge line (4a) by the steering valve (43).
  • the manual steering valve 43 is capable of switching the flow path of the working fluid supplied from the steering pump 2 by moving in the directions opposite to each other on one axis. 6, in a state where the manual steering valve 43 is positioned so as not to allow the working fluid supplied from the steering pump 2 to pass therethrough, the manual steering valve 43 is moved to the left
  • the working fluid supplied from the steering pump 2 is supplied to the first cylinder 120a and the working fluid discharged from the second cylinder 120b is discharged to the manual discharge line 4a have. As shown in FIG.
  • the manual steering valve 43 may include a first manual steering mechanism 431, a second manual steering mechanism 432, and a third manual steering mechanism 433.
  • the first manual steering mechanism 431 blocks the working fluid supplied from the steering pump 2 from being supplied to the steering cylinder 120. As shown in FIG. 6, as the manual steering valve 43 is moved, the first manual steering mechanism 431 is operated by the manual branch line 22, the manual discharge line 4a, The first manual steering mechanism 431 is connected to the manual discharge line 4a and the second manual connection line 42 so that the working fluid supplied through the manual branch line 22 is supplied to the manual discharge line 4a, The first manual connection line 41, and the second manual connection line 42, respectively.
  • the first manual steering mechanism 431 is connected to the manual branch line 22, the manual discharge line 4a, the first manual connecting line 41, , And the second passive connection line (42), respectively.
  • the second manual steering mechanism 432 supplies the working fluid supplied from the steering pump 2 to the first cylinder 120a.
  • the second manual steering mechanism 432 As shown in FIG. 7, as the manual steering valve 43 is moved, the second manual steering mechanism 432 is driven by the manual branch line 22, the manual discharge line 4a, (41) and the second manual connection line (42), the second manual steering mechanism (432) is connected to the first manual connection line (41) in the manual branch line (22) Allowing it to flow. Accordingly, the working fluid supplied from the steering pump 2 can be supplied to the first cylinder 120a through the first manual connecting line 41 and the first steering line 140a. In this case, the second manual steering mechanism 432 may allow the working fluid to flow from the second manual connecting line 42 to the manual discharge line 4a.
  • the working fluid discharged from the second cylinder 120b may be discharged through the second manual connecting line 42 and the manual discharge line 4a.
  • the second manual steering mechanism 432 supplies the working fluid supplied from the steering pump 2 to the first cylinder 120a and the working fluid discharged from the second cylinder 120b to the manual And can be discharged to the discharge line 4a.
  • the second manual steering mechanism 432 is connected to the passive branch line 22 and the first manual connecting line 41 and the second manual connecting line 42 and the manual discharge line 4a, respectively.
  • the second manual steering mechanism 432 may be further connected to the manual priority conversion line 32.
  • the second manual steering mechanism 432 allows the working fluid to flow from the manual branch line 22 to the first manual connecting line 41, 1 passive connection line 41 to allow the portion of the working fluid flowing into the manual prioritization line 32 to flow.
  • the second manual steering mechanism 432 can supply the working fluid supplied from the steering pump 2 to the first manual connecting line 41 and the manual priority converting line 32, respectively.
  • the second manual steering mechanism 432 supplies the working fluid to the first cylinder 120a and the manual priority switching valve 31 (see FIG. 3) to block the supply of the working fluid to the automatic steering unit 5 To supply the working fluid.
  • the second manual steering mechanism 432 is connected to the passive branch line 22, the first manual connecting line 41 and the manual priority switching line 32, And a flow path to be connected to the line 42 and the manual discharge line 4a, respectively.
  • the second manual steering mechanism 432 may be further connected to the hydraulic motor 150 to assist the movement of the manual steering valve 28.
  • the second manual steering mechanism 432 allows the working fluid to flow from the manual branch line 22 to the hydraulic motor 150, and at the same time, the working fluid again supplied through the hydraulic motor 150 May pass through the first passive connection line (41). Accordingly, the working fluid supplied from the steering pump 2 is supplied to the hydraulic motor 150 via the second manual steering mechanism 432, and thereafter, again through the second manual steering mechanism 432 May be supplied to the first manual connecting line (41).
  • the second manual steering mechanism 432 is connected to each of the hydraulic motor 150 and the first manual connecting line 41 via a path for connecting to the manual branch line 22 and the hydraulic motor 150, And a flow path for connection to the second manual connection line 42 and the manual discharge line 4a, respectively.
  • the flow path to be connected to each of the manual branch line 22 and the hydraulic motor 150 may be provided with a branch flow path to be connected to the manual priority switching line 32.
  • the third manual steering mechanism 433 supplies the working fluid supplied from the steering pump 2 to the second cylinder 120b. As shown in FIG. 8, as the manual steering valve 43 is moved, the third manual steering mechanism 433 is driven by the manual branch line 22, the manual discharge line 4a, The third manual steering mechanism 433 is connected to the first manual connecting line 42 and the second manual connecting line 42 so that the working fluid flows from the manual branch line 22 to the second manual connecting line 42 Allowing it to flow. Accordingly, the working fluid supplied from the steering pump 2 can be supplied to the second cylinder 120b through the second manual connecting line 42 and the second steering line 140b. In this case, the third manual steering mechanism 433 may allow the working fluid to flow from the first manual connecting line 41 to the manual discharge line 4a.
  • the working fluid discharged from the first cylinder 120a can be discharged through the first manual connecting line 41 and the manual discharge line 4a.
  • the third manual steering mechanism 433 supplies the working fluid supplied from the steering pump 2 to the second cylinder 120b, and the working fluid discharged from the first cylinder 120a is manually operated And can be discharged to the discharge line 4a.
  • the third manual steering mechanism 433 includes a passage for connecting to the manual branch line 22 and the second manual connection line 42 and a passage for connecting the first manual connection line 41 and the manual discharge line 42. [ 4a, respectively.
  • the third manual steering mechanism 433 may be further connected to the manual priority conversion line 32.
  • the third manual steering mechanism 433 allows the working fluid to flow from the manual branch line 22 to the second manual connecting line 42, 2 passive connection line 42 to allow the portion of the working fluid to flow into the manual priority conversion line 32.
  • the third manual steering mechanism 433 can supply the working fluid supplied from the steering pump 2 to the second manual connecting line 42 and the manual priority converting line 32, respectively. Therefore, the third manual steering mechanism 433 supplies the working fluid to the second cylinder 120b and the manual priority switching valve 31 (see FIG. 3) to block the supply of the working fluid to the automatic steering unit 5 To supply the working fluid.
  • the third manual steering mechanism 433 is connected to each of the passive branch line 22, the second manual connection line 42 and the manual priority switching line 32, And a flow path for connection to the line 41 and the manual discharge line 4a, respectively.
  • the third manual steering mechanism 433 may be further connected to the hydraulic motor 150.
  • the third manual steering mechanism 433 allows the working fluid to flow from the manual branch line 22 to the hydraulic motor 150, and at the same time, the working fluid again supplied through the hydraulic motor 150 To the second passive connection line (42).
  • the working fluid supplied from the steering pump 2 is supplied to the hydraulic motor 150 via the third manual steering mechanism 433, and thereafter is supplied again through the third manual steering mechanism 433 And may be supplied to the second manual connection line 42.
  • the third manual steering mechanism 433 is connected to each of the hydraulic motor 150 and the second manual connecting line 42 by a hydraulic oil path connected to the manual branch line 22 and the hydraulic motor 150, And a flow path for connection to the first manual connection line 41 and the manual discharge line 4a, respectively.
  • the flow path to be connected to each of the manual branch line 22 and the hydraulic motor 150 may be provided with a branch flow path to be connected to the manual priority switching line 32.
  • the third manual steering mechanism 433, the second manual steering mechanism 432 and the first manual steering mechanism 431 are arranged in parallel to each other with respect to the axial direction in which the manual steering valve 43 moves . 6 to 8, the first manual steering mechanism 431 may be disposed between the third manual steering mechanism 433 and the second manual steering mechanism 432. [ In this case, the third manual steering mechanism 433 may be disposed on the left side with respect to the first manual steering mechanism 431. The second manual steering mechanism 432 may be disposed on the right side of the first manual steering mechanism 431.
  • the automatic steering unit 5 changes the traveling direction as the automatic steering is performed.
  • the automatic steering unit 5 may be connected to the manual priority switching unit 3 and the steering cylinder 120, respectively.
  • the automatic steering unit 5 may be connected to the manual priority switching unit 3 via the automatic supply line 3a.
  • the automatic steering unit 5 transmits the working fluid supplied through the automatic supply line 3a through the manual priority switching valve 31 to the steering cylinder (not shown) (120).
  • the automatic steering unit 5 can supply the working fluid to any one of the first cylinder 120a and the second cylinder 120b under the control of the control unit 130 . In this case, the automatic steering unit 5 is operated under the control of the control unit 130 (shown in FIG. 2) from the other cylinder of the first cylinder 120a and the second cylinder 120b Can be discharged.
  • the automatic steering unit 5 may discharge the working fluid discharged from the other cylinder of the first cylinder 120a and the second cylinder 120b to the external discharge line 6. [ In this case, the automatic steering unit 5 may be connected to the external discharge line 6.
  • the external discharge line (6) is connected to the external device (200).
  • the external discharge line 6 may be connected to the manual discharge line 4a.
  • the automatic steering unit 5 may be connected to the first cylinder 120a and the second cylinder 120b, respectively.
  • the automatic steering unit 5 may be connected to the first cylinder 120a through a first automatic connection line 51.
  • the first automatic connection line 51 may be connected to the first steering line 140a, thereby being connected to the first cylinder 120a through the first steering line 140a.
  • One side of the first steering line 140a may be connected to the first automatic connection line 51 and the other side thereof may be connected to the first cylinder 120a.
  • the automatic steering unit 5 may be connected to the second cylinder 120b through a second automatic connection line 52.
  • the second automatic connection line 52 is connected to the second steering line 140b, thereby being connected to the second cylinder 120b through the second steering line 140b.
  • One side of the second steering line 140b may be connected to the second automatic connection line 52 and the other side thereof may be connected to the second cylinder 120b.
  • the automatic steering unit 5 supplies working fluid to any one of the first cylinder 120a and the second cylinder 120b and discharges the working fluid from the other cylinder To the external discharge line (6).
  • the automatic steering unit 5 may include a first automatic check valve 53 and a second automatic check valve 54.
  • the first automatic check valve (53) is installed in the first automatic connection line (51).
  • the first automatic check valve 53 may pass the working fluid supplied to the first cylinder 120a.
  • the first automatic check valve (53) may block the working fluid discharged from the first cylinder (120a) from passing therethrough. In this way, the first automatic check valve 53 can pass the working fluid flowing in the forward direction toward the first cylinder 120a and shut off the working fluid flowing in the reverse direction opposite to the forward direction .
  • the first automatic check valve 53 may be implemented using a check valve.
  • the second automatic check valve (54) is installed in the second automatic connection line (52).
  • the second automatic check valve 54 may pass the working fluid supplied to the second cylinder 120b.
  • the second automatic check valve 54 may block the working fluid discharged from the second cylinder 120b from passing therethrough. In this way, the second automatic check valve 54 can pass the working fluid flowing in the normal direction toward the second cylinder 120b and block the working fluid flowing in the reverse direction opposite to the normal direction .
  • the second automatic check valve 54 may be implemented using a check valve.
  • the first automatic connection line 51 and the first manual connection line 41 may be connected to the first cylinder 120a through the first steering line 140a.
  • the first automatic check valve 53 is supplied from the first manual connecting line 41
  • the working fluid supplied to the first cylinder 120a through the first manual connecting line 41 is supplied to the first automatic connecting line 51 using the first automatic check valve 53, Can be prevented from being lost.
  • the second automatic connection line 52 and the second manual connection line 42 may be connected to the second cylinder 120b through the second steering line 140b.
  • the second automatic check valve 54 is supplied from the second manual connecting line 42
  • the working fluid supplied to the second cylinder 120b through the second manual connecting line 42 is supplied to the second automatic connecting line 52 by using the second automatic check valve 54, Can be prevented from being lost.
  • the automatic steering unit 5 may include a first automatic opening line 55 and a second automatic opening line 56.
  • the first automatic opening line 55 opens the second automatic check valve 54 using a working fluid supplied to the first cylinder 120a.
  • One side of the first automatic opening line 55 may be connected to the first automatic connection line 51.
  • the first automatic check valve 53 is disposed between the first automatic connection line 51 and the first automatic opening line 55, .
  • the first automatic opening line 55 is connected to the first automatic check valve 53 at the inlet side of the first automatic check valve 53 with reference to the flow direction of the working fluid supplied to the first cylinder 120a, And may be connected to the connection line 51.
  • the other end of the first automatic opening line 55 may be connected to the second automatic check valve 54.
  • the first automatic opening line 55 connects the second automatic check valve 54 to a portion of the working fluid flowing toward the first automatic check valve 53 through the first automatic connection line 51,
  • the second automatic check valve 54 can be opened. Accordingly, the working fluid discharged from the second cylinder 120b can pass through the second automatic check valve 54.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention opens the second automatic check valve 54 using the working fluid supplied to the first cylinder 120a, So that the working fluid can be smoothly discharged from the discharge port 120b.
  • the second automatic opening line 56 opens the first automatic check valve 53 using a working fluid supplied to the second cylinder 120b.
  • One side of the second automatic opening line 56 may be connected to the second automatic connection line 52.
  • the second automatic check valve 54 is disposed between the second automatic connection line 52 and the second automatic opening line 56 at a point where the second steering line 140b is connected, .
  • the second automatic opening line 56 is connected to the second automatic check valve 54 at the inlet side of the second automatic check valve 54 with reference to the flow direction of the working fluid supplied to the second cylinder 120b. May be connected to the connection line (52).
  • the other side of the second automatic opening line 56 may be connected to the first automatic check valve 53.
  • the second automatic opening line 56 connects the first automatic check valve 53 to the second automatic check valve 54 through the second automatic connection line 52, The first automatic check valve 53 can be opened. Accordingly, the working fluid discharged from the first cylinder 120a can pass through the first automatic check valve 53. [ Accordingly, the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention opens the first automatic check valve 53 using the working fluid supplied to the second cylinder 120b, The working fluid can be smoothly discharged from the discharge port 120a.
  • the automatic steering unit 5 may include an automatic steering valve 57.
  • the automatic steering valve 57 is moved in accordance with the automatic steering.
  • the automatic steering valve 57 may be moved under the control of the controller 130 (shown in FIG. 2).
  • the automatic steering valve 57 can be moved to switch the flow path of the working fluid supplied from the manual priority switching unit 3 in accordance with the automatic steering. Specifically, it is as follows.
  • the automatic steering valve 57 can be moved so that the working fluid supplied from the manual priority switching unit 3 can not pass through. Accordingly, no working fluid is supplied to both the first cylinder 120a and the second cylinder 120b.
  • the automatic steering valve 57 is controlled by the manual priority switching unit 3 So as to supply the working fluid to the first automatic connection line (51).
  • the working fluid supplied to the first automatic connection line 51 may be supplied to the first cylinder 120a through the first steering line 140a.
  • the automatic steering valve 57 may discharge the working fluid discharged from the second cylinder 120b to the external discharge line 6.
  • the working fluid discharged from the second cylinder 120b is supplied to the automatic steering valve 57 through the second steering line 140b and the second automatic connecting line 52, Can be discharged to the external discharge line (6) by the steering valve (57).
  • the automatic steering valve 57 is controlled by the manual priority switching unit 3 And to supply the working fluid to the second automatic connection line (52).
  • the working fluid supplied to the second automatic connection line 52 may be supplied to the second cylinder 120b through the second steering line 140b.
  • the automatic steering valve 57 may discharge the working fluid discharged from the first cylinder 120a to the external discharge line 6.
  • the working fluid discharged from the first cylinder 120a is supplied to the automatic steering valve 57 through the first steering line 140a and the first automatic connecting line 51, Can be discharged to the external discharge line (6) by the steering valve (57).
  • the automatic steering valve 57 can be switched in a direction opposite to that on one axis to switch the flow path of the working fluid supplied from the manual priority switching unit 3.
  • the automatic steering valve 57 in the state where the automatic steering valve 57 is positioned such that the working fluid supplied from the manual priority switching unit 3 can not pass through, the automatic steering valve 57, as shown in FIG. 10, The operation fluid supplied from the manual priority switching unit 3 is supplied to the first cylinder 120a and the working fluid discharged from the second cylinder 120b is supplied to the external discharge line 6, .
  • the automatic steering valve 57 in the state where the automatic steering valve 57 is positioned such that the working fluid supplied from the manual priority switching unit 3 is not allowed to pass, the automatic steering valve 57, as shown in FIG. 11, The operation fluid supplied from the manual priority switching unit 3 is supplied to the second cylinder 120b and the working fluid discharged from the first cylinder 120a is supplied to the manual discharge line 4a, .
  • the automatic steering valve 57 may include a first automatic steering mechanism 571, a second automatic steering mechanism 572, and a third automatic steering mechanism 573.
  • the first automatic steering mechanism 571 blocks supply of the working fluid supplied from the manual priority switching unit 3 to the steering cylinder 120. 9, as the automatic steering valve 57 is moved, the first automatic steering mechanism 571 is connected to the automatic supply line 3a, the external discharge line 6, The second automatic steering mechanism 51 and the second automatic connection line 52, the first automatic steering mechanism 571 may block all the lines from being connected to each other.
  • the first automatic steering mechanism 571 is connected to the automatic supply line 3a, the external discharge line 6, the first automatic connection line 51, and the second automatic connection line 51 when the automatic steering valve 57 is in the automatic neutral position. , And the second automatic connection line (52), respectively.
  • the second automatic steering mechanism 572 supplies the working fluid supplied from the manual priority switching unit 3 to the first cylinder 120a. 10, as the automatic steering valve 57 moves, the second automatic steering mechanism 572 moves the automatic supply line 3a, the external discharge line 6, (51) and the second automatic connection line (52), the second automatic steering mechanism (572) is connected to the first automatic connection line (51) from the automatic supply line (3a) Allowing it to flow. Accordingly, the working fluid supplied from the manual priority switching unit 3 can be supplied to the first cylinder 120a through the first automatic connecting line 51 and the first steering line 140a. In this case, the second automatic steering mechanism 572 may allow the working fluid to flow from the second automatic connection line 52 to the external discharge line 6.
  • the working fluid discharged from the second cylinder 120b can be discharged through the second steering line 140b, the second automatic connecting line 52, and the external discharge line 6. Therefore, the second automatic steering mechanism 572 supplies the working fluid supplied from the manual priority switching unit 3 to the first cylinder 120a and the working fluid discharged from the second cylinder 120b Can be discharged to the external discharge line (6).
  • the second automatic steering mechanism 572 is connected to the automatic supply line 3a and the first automatic connection line 51 and the second automatic connection line 52 and the external discharge line 6, respectively.
  • the third automatic steering mechanism 573 supplies the working fluid supplied from the manual priority switching unit 3 to the second cylinder 120b. 11, as the automatic steering valve 57 is moved, the third automatic steering mechanism 573 is connected to the automatic supply line 3a, the external discharge line 6, The third automatic steering mechanism 573 is connected to the first automatic connection line 52 and the second automatic connection line 52 so that the working fluid flows from the automatic supply line 3a to the second automatic connection line 52, Allowing it to flow. Accordingly, the working fluid supplied from the manual priority switching unit 3 can be supplied to the second cylinder 120b through the second automatic connection line 52 and the second steering line 140b. In this case, the third automatic steering mechanism 573 may allow the working fluid to flow from the first automatic connection line 51 to the external discharge line 6.
  • the working fluid discharged from the first cylinder 120a can be discharged through the first steering line 140a, the first automatic connecting line 51, and the external discharge line 6.
  • the third automatic steering mechanism 573 supplies the working fluid supplied from the manual priority switching unit 3 to the second cylinder 120b and the working fluid discharged from the first cylinder 120a Can be discharged to the external discharge line (6).
  • the third automatic steering mechanism 573 includes a flow path for connecting the automatic supply line 3a and the second automatic connection line 52 respectively and the first automatic connection line 51 and the external discharge line 6, respectively.
  • the third automatic steering mechanism 573, the second automatic steering mechanism 572 and the first automatic steering mechanism 571 are arranged side by side with respect to the axial direction in which the automatic steering valve 57 moves . 9 to 11, the first automatic steering mechanism 571 may be disposed between the third automatic steering mechanism 573 and the second automatic steering mechanism 572. [ In this case, the third automatic steering mechanism 573 may be disposed on the right side of the first automatic steering mechanism 571. The second automatic steering mechanism 572 may be disposed on the left side with respect to the first automatic steering mechanism 571.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle is implemented to detect whether or not the manual steering is performed. Specifically, it is as follows.
  • the manual priority switching unit 3 may include a manual steering line 33 and a pressure sensor 34.
  • the manual steering control line 33 is connected to the manual priority switching line 32. Accordingly, the working fluid flowing through the manual priority switching line 32 is partially branched and flows through the manual steering control line 33.
  • One side of the manual steering control line 33 may be connected to the manual priority switching line 32 and the other side may be connected to the pressure sensor 34.
  • the pressure sensor 34 measures the pressure of the working fluid flowing along the manual steering sensing line 33.
  • the pressure sensor 34 may generate a sensing signal for the measured oil pressure value and provide the sensing signal to the controller 130.
  • the control unit 130 may control the hydraulic pressure value measured by the pressure sensor 34 or the hydraulic pressure value measured by the manual steering control line 33 in accordance with the sensed signal generated by the pressure sensor 34, It is possible to determine whether or not the manual steering is performed by determining whether the pressure of the working fluid flowing exceeds the preset hydraulic pressure value.
  • the predetermined oil pressure value is a hydraulic pressure value of the working fluid capable of moving the manual priority switching valve 31 to block the supply of the working fluid supplied from the steering pump 2 to the automatic steering unit 5, And can be preset by the user.
  • the hydraulic pressure value measured by the pressure sensor 34 can be manually inputted through the manual priority switching line 32,
  • the hydraulic pressure value of the working fluid pressurizing the switching valve 31 can be substantially coincided with the hydraulic pressure value of the working fluid.
  • the fact that the hydraulic pressure measured by the pressure sensor 34 exceeds the predetermined hydraulic pressure value means that the manual-priority control is performed so as to block the working fluid supplied from the steering pump 2 from being supplied to the automatic steering unit 5 It means that the switching valve 31 has been moved.
  • the controller 130 may confirm that the manual steering is performed and stop the automatic steering. In this case, the controller 130 may move the automatic steering valve 57 to the automatic neutral position. Accordingly, when the manual steering is switched back to the automatic steering, the controller 130 controls the automatic steering valve 57 (refer to FIG. 5), using the position at which the automatic steering valve 57 is disposed at the automatic neutral position as a reference point. The traveling direction can be changed. Even if the control unit 130 does not move the automatic steering valve 57 to the automatic neutral position after the detection signal is received, the automatic steering unit 4 is automatically controlled by the manual priority switching unit 3 The automatic steering is not performed because the operating fluid is not supplied.
  • the pressure sensor 34 may provide the sensing signal to the controller 130 using wireless communication or wire communication.
  • the control unit 130 can confirm the driving direction through a wheel angle sensor installed in the driving unit 110.
  • the steering angle sensor may provide steering information about the direction and angle of the wheels 111 and 111 'to the controller 130.
  • the control unit 130 may control the automatic steering unit 4 so that the agricultural work vehicle 100 travels along a predetermined traveling route using the steering information.
  • the steering angle sensor may provide steering information about the direction and angle of any one of the wheels 111 and 111 'to the controller 130.
  • the steering angle sensor may provide the steering unit 130 with the steering information using wireless communication, wire communication, or the like.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention may include the steering priority unit 7.
  • the steering preferential unit 7 is connected to the steering pump 2 and the external discharge line 6, respectively.
  • the steering priority unit 7 may be connected to the steering pump 2 on one side and to the external discharge line 6 on the other side. Accordingly, the working fluid can be discharged from the steering pump 2 to the external discharge line 6 via the steering preferential unit 7.
  • One side of the steering preferential unit 7 may be connected to the automatic branch line 23 so that it can be connected to the steering pump 2 via the automatic branch line 23 and the supply line 21.
  • the steering preferential unit 7 can selectively discharge the working fluid supplied from the steering pump 2 to the external discharge line 6 depending on whether the manual steering is performed or not and whether the automatic steering is performed have.
  • the steering preferential unit 7 can block the working fluid supplied from the steering pump 2 from being discharged to the external discharge line 6.
  • the steering priority unit 7 can be implemented so that the operating fluid supplied from the steering pump 2 is not discharged to the external device 200 when the manual steering or the automatic steering is performed. Therefore, the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention can supply the working fluid to the manual steering unit 4 or the automatic steering unit 5 insufficiently in the process of the manual steering or the automatic steering Can be prevented.
  • the steering preferential unit 7 may include a steering discharge line 7a connected to the automatic branch line 23 and the external discharge line 6, respectively.
  • the steering discharge line (7a) may be connected to the automatic branch line (23) on one side and the external discharge line (6) on the other side. If the manual steering and the automatic steering are not performed, the working fluid may be discharged to the external discharge line 6 via the steering priority unit 7 via the steering discharge line 7a. When the manual steering or the automatic steering is performed, the working fluid can be blocked from being discharged to the external discharge line (6) by the steering preferential unit (7).
  • the steering preferential unit 7 may include a steering priority valve 71.
  • the steering priority valve (71) moves to selectively pass the working fluid supplied from the steering pump (2). Specifically, it is as follows.
  • the steering priority valve 71 can be moved to allow the working fluid supplied from the steering pump 2 to be discharged to the external discharge line 6 as shown in FIG. Accordingly, the steering priority valve (71) allows the working fluid supplied from the steering pump (2) to pass, thereby allowing the working fluid to be discharged to the external discharge line (6). Accordingly, a working fluid can be supplied to the external device 200.
  • the steering priority valve 71 can be moved so as to block the working fluid supplied from the steering pump 2 from being discharged to the external discharge line 6. Accordingly, the steering priority valve 71 blocks the working fluid supplied from the steering pump 2, thereby preventing the working fluid from being discharged to the external discharge line 6. [ Therefore, it is possible to prevent the working fluid from being supplied to the external device 200.
  • the steering priority valve 71 can selectively pass the working fluid supplied from the steering pump 2 by moving on one axis.
  • the steering priority valve 71 can be moved to selectively pass the working fluid supplied from the steering pump 2 depending on whether the manual steering is performed or not.
  • the steering priority valve 71 may be implemented to move using the working fluid. Specifically, it is as follows.
  • the steering priority valve 71 uses the working fluid supplied from the steering pump 2 to discharge the working fluid supplied from the steering pump 2 to the outside discharge line 6 In order to be able to move. Accordingly, since the working fluid is discharged to the external discharge line 6, the working fluid can be supplied to the external device 200.
  • the working fluid supplied from the steering pump 2 can be used to pressurize and move the steering priority valve 71 by being partially branched.
  • the steering preferential unit 7 may include an exhaust opening line 7b connected to the steering discharge line 7a. One side of the discharge opening line 7b may be connected to the steering discharge line 7a and the other side may be connected to the steering priority valve 71.
  • One side of the discharge opening line 7b is connected to the inlet side of the steering priority valve 71 on the basis of the flow direction of the working fluid discharged to the outside discharge line 6 through the steering discharge line 7a And may be connected to the steering discharge line 7a.
  • the working fluid supplied by the steering pump 2 (shown in Fig. 2) is supplied to the automatic branch line 23 and then supplied to the steering discharge line 7a.
  • the steering priority valve 71 is in a state of moving to block the working fluid.
  • the steering priority valve 71 is moved to allow the working fluid to be discharged from the steering discharge line 7a to the external discharge line 6. [ 9, the steering priority valve 71 can be moved to the left by the working fluid supplied to the discharge opening line 7b. Therefore, the working fluid can be discharged to the external discharge line 6 after passing through the steering priority valve 71 through the steering discharge line 7a.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention when both the manual steering and the automatic steering are not performed, the hydraulic fluid supplied from the steering pump 2, The steering priority valve 71 can be moved so that the working fluid is discharged to the discharge line 6. Therefore, the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention can be configured such that only the manual steering and the automatic steering are not performed without any separate operation, and the operating fluid supplied from the steering pump 2, And discharged to the discharge line (6).
  • the manual steering can be performed as the driver operates the steering wheel
  • the operating fluid supplied by the steering pump 2 is supplied to the automatic steering unit 5 through the automatic branch line 23 and the automatic supply line 3a, So that the automatic steering can be performed.
  • the steering priority valve 71 is connected to the steering pump 2 by using the working fluid supplied from either the manual steering unit 4 or the automatic steering unit 5, To prevent the working fluid supplied from the external discharge line (6) from being discharged to the external discharge line (6). Accordingly, since the working fluid is not discharged to the external discharge line 6, the operating fluid is not supplied to the external device 200 but the working fluid is supplied only to the steering cylinder 120.
  • the working fluid supplied from either the manual steering unit 4 or the automatic steering unit 5 to the steering cylinder 120 is partially branched so as to be used for pressing and moving the steering priority valve 71 .
  • the steering preferential unit 7 includes a first steering priority line 72, a second steering priority line 73, a third steering priority line 74, and a first steering priority shuttle valve 75 can do.
  • the first steering priority line 72 is connected to the automatic steering unit 5 and the first steering priority shuttle valve 75, respectively.
  • the working fluid supplied from the automatic steering unit 5 to the steering cylinder 120 may be partially branched and supplied to the first steering priority shuttle valve 75 through the first steering priority line 72 .
  • the second steering priority line 73 is connected to the first steering priority shuttle valve 75 and the steering priority valve 71, respectively.
  • the working fluid that has passed through the first steering priority shuttle valve 75 is supplied to the steering priority valve 71 through the second steering priority line 73 and is then able to pressurize the steering priority valve 71 have.
  • the third steering priority line 74 is connected to the manual priority switching line 32 and the first steering priority shuttle valve 75, respectively.
  • the working fluid supplied from the manual steering unit 4 to the steering cylinder 120 is partially branched and supplied to the manual priority switching line 32 and then flows through the manual priority switching line 32, May be branched at the point where the third steering priority line (74) is connected and supplied to the third steering priority line (74).
  • the working fluid flowing through the manual priority switching line 32 may be diverted to the third steering priority line 74 and the manual steering control line 33, respectively, (31).
  • the first steering priority shuttle valve 75 is installed at a point where the first steering priority line 72, the second steering priority line 73 and the third steering priority line 74 are connected to each other .
  • the first steering priority shuttle valve 75 is connected to the second steering priority line 73 via the first steering priority line 72 and the third steering priority line 74, To the steering priority valve (71). Accordingly, the steering priority valve (71) uses the working fluid supplied through the second steering priority line (73) to discharge the working fluid supplied from the steering pump (2) to the external discharge line (6) In order to prevent them from being blocked.
  • the flow of the working fluid supplied by the steering pump 2 is as follows.
  • the steering priority valve 71 is configured such that the working fluid supplied from the steering pump 2 is supplied to the external discharge line (not shown) by using the working fluid supplied from the steering pump 2 6 so as to be discharged.
  • the working fluid is supplied to the steering cylinder 120 through the automatic steering valve 57.
  • a part of the working fluid supplied to the automatic steering valve 57 is branched and supplied to the first steering priority line 72.
  • the automatic steering valve 57 may include a passage connecting the automatic supply line 3a and the first steering priority line 72 as the automatic steering is performed.
  • each of the second automatic steering mechanism 572 and the third automatic steering mechanism 573 may include a flow path connecting the automatic supply line 3a and the first steering priority line 72 .
  • the second automatic steering mechanism 572 branches a part of the working fluid supplied to the first cylinder 120a, Can be supplied to the first steering priority line (72).
  • the working fluid is supplied to the first steering priority line 72 via the first steering priority line 72, May be supplied to the second steering priority line (73) through the shuttle valve (75).
  • the second automatic steering mechanism 572 may include a flow path for connection to the automatic supply line 3a, the first automatic connection line 51, and the first steering priority line 72, respectively.
  • the third automatic steering mechanism 573 branches a part of the working fluid supplied to the second cylinder 120b, Can be supplied to the first steering priority line (72).
  • the working fluid is supplied to the first steering priority line 72 via the first steering priority line 72, May be supplied to the second steering priority line (73) through the shuttle valve (75).
  • the third automatic steering mechanism 573 may include a flow path for connecting to the automatic supply line 3a, the second automatic connection line 52, and the first steering priority line 72, respectively.
  • the working fluid is supplied to the manual priority switching valve 31 through the manual priority switching line 32.
  • a portion of the working fluid flowing through the manual priority conversion line 32 is branched and supplied to the third steering priority line 74.
  • the working fluid supplied to the third steering priority line 74 may be supplied to the second steering priority line 73 through the first steering priority shuttle valve 75.
  • the operating fluid supplied to the second steering priority line 73 flows toward the steering priority valve 71 as the automatic steering and the manual steering are performed, and then the steering priority The valve 71 is pressed. Accordingly, the steering priority valve 71 moves to block the working fluid from being discharged from the steering discharge line 7a to the external discharge line 6.
  • the steering priority valve 71 is connected to the steering pump 120 using part of the working fluid supplied from either the manual steering unit 4 or the automatic steering unit 5 to the steering cylinder 120 2 from being supplied to the external discharge line (6).
  • the steering priority valve 71 can be moved to the right by the working fluid supplied through the second steering priority line 73.
  • the steering priority valve 71 can be moved to the right by the resilient force of the spring and the pressing force of the working fluid supplied through the second steering priority line 73. Accordingly, when the hydraulic pressure of the working fluid supplied through the second steering priority line 73 and the hydraulic pressure of the working fluid supplied through the discharge opening line 7b are equal, It can be moved to the right by the elastic force. Therefore, the working fluid supplied to the steering discharge line 7a can not be discharged to the external discharge line 6 because it can not pass through the steering priority valve 71.
  • the second steering priority line 73 and the discharge opening line 7b may be disposed opposite to each other with respect to the steering priority valve 71.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle when any one of the manual steering and the automatic steering is performed, the operating fluid supplied to the steering cylinder 120 is used as the external The steering priority valve 71 can be moved so that the working fluid is not discharged to the discharge line 6. Accordingly, the hydraulic steering apparatus 1 of the agricultural working vehicle according to the present invention prevents the working fluid from being supplied to the external device 200 by using the working fluid supplied to the steering cylinder 120 without any additional operation And the working fluid is intensively supplied to the steering cylinder 120.
  • the steering priority valve 71 may include a first steering preference mechanism 711 and a second steering preference mechanism 712.
  • the first steering preference mechanism 711 is to block the working fluid.
  • the first steering preference mechanism 711 is connected to the steering discharge line 7a as the steering priority valve 71 moves, the first steering preference mechanism 711 is connected to the steering discharge line 7a And can prevent the working fluid from being discharged to the external discharge line (6).
  • the second steering preference mechanism 712 is to pass a working fluid. If the second steering preference mechanism 712 is connected to the steering discharge line 7a as the steering priority valve 71 is moved, the second steering preference mechanism 712 is connected to the steering discharge line 7a Allowing the working fluid to flow to the external discharge line (6).
  • the second steering preference mechanism 712 may include a passage connected to the steering discharge line 7a.
  • the second steering preference mechanism 712 and the first steering preference mechanism 711 may be arranged side by side on the basis of the axial direction in which the steering priority valve 71 moves. 9 to 11, the second steering preference mechanism 712 may be disposed on the right side with respect to the first steering preference mechanism 711.
  • the second automatic steering mechanism 572 branches a part of the working fluid supplied to the first cylinder 120a and supplies it to the steering priority valve 71, and the third automatic steering mechanism 573 to the steering priority valve 71, the second automatic steering mechanism 572 and the third automatic steering mechanism 71 may be configured such that the first and second automatic steering mechanisms 571, (573) may be implemented to include five connection ports, respectively.
  • the second automatic steering mechanism 572 and the third automatic steering mechanism 573 are connected to the automatic supply line 3a, the external discharge line 6, the first automatic connection line 51, An automatic connection line 52, and a connection port for connection to the first steering priority line 72, respectively.
  • the first automatic steering mechanism 571 may also be configured to include five connection ports.
  • the steering preferential unit 7 may include a second steering priority shuttle valve 76.
  • the second steering priority shuttle valve 76 is installed in the first steering priority line 72.
  • the first steering priority line 72 may be connected to the first automatic connection line 51, the second automatic connection line 52, and the first steering priority shuttle valve 75, respectively.
  • the first steering priority line 72 includes a first portion connected to the first automatic connection line 51, a second portion connected to the second automatic connection line 52, and a second portion connected to the first steering priority shuttle valve 75 And a second portion coupled to the second portion.
  • the second steering priority shuttle valve 76 may be installed at a point where the first portion, the second portion, and the third portion are connected to each other.
  • the second steering priority shuttle valve 76 may be connected to the first automatic connection line 51 and the second automatic connection line 52 through the first steering priority line 72, respectively.
  • the second steering priority shuttle valve 76 may transmit a part of the working fluid supplied to the steering cylinder 120 to the steering priority valve 71 through the first steering priority line 72 in accordance with the automatic steering May be installed in the first steering priority line (72).
  • a part of the working fluid supplied to the steering cylinder 120 through any one of the first automatic connection line 51 and the second automatic connection line 52 is supplied to the first steering priority line 72
  • the working fluid supplied to the second steering priority line 73 is supplied to the steering priority valve 71 so as to block the supply of the working fluid to the external discharge line 6 by pressurizing the steering priority valve 71 Can be moved.
  • the working fluid flows through the first automatic connecting line 51 and then flows through the first steering priority line 72 to the first steering priority line 72 and after passing through the second steering priority shuttle valve 76, the first steering priority line 72 and the second steering priority shuttle valve 76, And may be supplied to the steering priority valve 71 through the second steering priority line 73.
  • the steering priority valve 71 can be moved to block the supply of working fluid to the external discharge line 6 by using a part of the working fluid supplied to the first cylinder 120a.
  • the working fluid can be discharged from the second cylinder 120b.
  • the working fluid discharged from the second cylinder 120b may be discharged to the outside discharge line 6 through the second automatic connection line 52 and the automatic steering valve 57.
  • the working fluid flows through the second automatic connecting line 52, and the first steering priority line ( 72 to the first steering priority line 72 and after passing through the second steering priority shuttle valve 76, the first steering priority line 72 and the second steering priority shuttle valve 76, And may be supplied to the steering priority valve 71 through the second steering priority line 73.
  • the steering priority valve 71 can be moved to block the supply of working fluid to the external discharge line 6 by using a part of the working fluid supplied to the second cylinder 120b.
  • the working fluid may be discharged from the first cylinder 120a.
  • the working fluid discharged from the first cylinder 120a may be discharged to the external discharge line 6 through the first automatic connection line 51 and the automatic steering valve 57.
  • the steering priority valve 71 can be moved to allow the working fluid supplied from the steering pump 2 to be discharged to the external discharge line 6. Therefore, the steering priority valve 71 allows the working fluid supplied from the steering pump 2 to pass through, thereby allowing the working fluid to be discharged to the external discharge line 6. Accordingly, a working fluid can be supplied to the external device 200.
  • the steering priority unit 7 is connected to the first automatic connection line 51 and the second automatic connection line 52 via the second steering priority shuttle valve 76
  • the second automatic steering mechanism 572 and the third automatic steering mechanism 573 are connected to the automatic supply line 3a, the external discharge line 6, the first automatic connection line 51, 2 automatic connection lines 52, respectively. 9 to 11, the number of connection ports of each of the second automatic steering mechanism 572 and the third automatic steering mechanism 573 can be reduced.
  • the first automatic steering mechanism 571 may also be configured to include four connection ports.
  • the automatic steering unit 5 is configured such that the above- 57, Figs. 9 to 14), the first automatic steering valve 58 and the second automatic steering valve 59 may be included.
  • the first automatic steering valve (58) moves according to the automatic steering.
  • the first automatic steering valve 58 may be moved under the control of the controller 130 (shown in FIG. 2).
  • the controller 130 may move the first automatic steering valve 58 by providing a control signal using wireless communication, wire communication, or the like.
  • the first automatic steering valve 58 may be connected to each of the manual priority switching unit 3 and the first cylinder 120a.
  • the first automatic steering valve 58 may be connected to the manual priority switching unit 3 through the automatic supply line 3a.
  • the first automatic steering valve 58 may be connected to the first cylinder 120a through the first automatic connection line 51.
  • the first automatic steering valve 58 may include a first automatic discharge mechanism 581 and a first automatic supply mechanism 582.
  • the first automatic discharge mechanism 581 passes the working fluid discharged from the first cylinder 120a and blocks the working fluid supplied from the manual priority switching unit 3. [ As shown in FIG. 16, as the first automatic steering valve 58 is moved, the first automatic discharge mechanism 581 is connected to the first automatic connection line 51, the external discharge line 6, The first automatic discharge mechanism 581 connects the first automatic connection line 51 and the external discharge line 6 and connects the automatic supply line 3a to the first automatic discharge line 58. [ Can be prevented from being connected to other lines. Accordingly, the working fluid discharged from the first cylinder 120a is supplied to the first automatic discharge mechanism 581 through the first automatic connection line 51, and then the first automatic discharge mechanism 581, And may be discharged to the external device 200 through the external discharge line 6. The working fluid supplied from the manual priority switching unit 3 is supplied to the first automatic discharge mechanism 581 through the automatic supply line 3a and then does not pass through the first automatic discharge mechanism 581 Can be blocked.
  • the first automatic supply mechanism 582 may pass the working fluid supplied from the manual priority switching unit 3 and shut off the working fluid from being discharged through the external discharge line 6. As shown in FIG. 15, as the first automatic steering valve 58 is moved, the first automatic supply mechanism 582 is connected to the first automatic connection line 51, the external discharge line 6, The first automatic supply mechanism 582 connects the first automatic connection line 51 and the automatic supply line 3a together with the external discharge line 6, Can be prevented from being connected to other lines. Accordingly, the working fluid supplied from the manual priority switching unit 3 is supplied to the first automatic supplying mechanism 582 through the automatic supplying line 3a, and then the first automatic supplying mechanism 582 And may be supplied to the first cylinder 120a through the first automatic connection line 51. [ No working fluid flows from the first automatic supply mechanism (582) to the external discharge line (6).
  • the first automatic supply mechanism 582 and the first automatic discharge mechanism 581 may be disposed in parallel to each other with respect to an axial direction in which the first automatic steering valve 58 moves. 15 and 16, the first automatic supplying mechanism 582 may be disposed on the left side with respect to the first automatic discharging mechanism 581.
  • the second automatic steering valve 59 is moved in accordance with the automatic steering.
  • the second automatic steering valve 59 can be moved under the control of the controller 130 (shown in FIG. 2).
  • the controller 130 shown in FIG. 2 can move the second automatic steering valve 59 by providing control signals using wireless communication, wire communication, or the like.
  • the second automatic steering valve 59 may be connected to each of the manual priority switching unit 3 and the second cylinder 120b.
  • the manual priority switching unit 3 is controlled so that the operating fluid supplied from the steering pump 2 is supplied to each of the second automatic steering valve 59 and the first automatic steering valve 58, Unit 4, the second automatic steering valve 59, and the first automatic steering valve 58, respectively.
  • the second automatic steering valve 59 may be connected to the manual priority switching unit 3 through the automatic supply line 3a.
  • the automatic supply line 3a is connected to the manual priority changeover valve 31 on the one side, and the other is branched to the second automatic steering valve 59 and the first automatic steering valve 58 Can be connected.
  • the second automatic steering valve 59 may be connected to the second cylinder 120b through the second automatic connection line 52.
  • the external discharge line 6 may be branched and connected to the second automatic steering valve 59 and the first automatic steering valve 58, respectively.
  • the second automatic steering valve 59 may include a second automatic discharge mechanism 591 and a second automatic supply mechanism 592.
  • the second automatic discharge mechanism 591 passes the working fluid discharged from the second cylinder 120b and blocks the working fluid supplied from the manual priority switching unit 3. As shown in FIG. 15, as the second automatic steering valve 59 is moved, the second automatic discharge mechanism 591 is connected to the second automatic connection line 52, the external discharge line 6, The second automatic discharge mechanism 591 connects the second automatic connection line 52 and the external discharge line 6 to the automatic supply line 3a, Can be prevented from being connected to other lines. Accordingly, the working fluid discharged from the second cylinder 120b is supplied to the second automatic discharge mechanism 591 through the second automatic connection line 52, and then the second automatic discharge mechanism 591, And may be discharged to the external device 200 through the external discharge line 6.
  • the working fluid supplied from the manual priority switching unit 3 is supplied to the second automatic discharge mechanism 591 through the automatic supply line 3a and does not pass through the second automatic discharge mechanism 591 Can be blocked.
  • the control unit 130 moves the second automatic steering valve 59 so that the working fluid discharged from the second cylinder 120b is discharged to the external discharge line 6
  • the first automatic steering valve 58 may be moved so that the working fluid is supplied to the first cylinder 120a.
  • the second automatic supply mechanism 592 may pass the working fluid supplied from the manual priority switching unit 3 and block the working fluid from being discharged through the external discharge line 6. 16, the second automatic feed mechanism 592 moves the second automatic connection line 52, the external discharge line 6, and the second automatic feed line 59 as the second automatic steering valve 59 moves.
  • the second automatic supply mechanism 592 connects the second automatic connection line 52 and the automatic supply line 3a together with the external discharge line 6 when connected to each of the automatic supply lines 3a, Can be prevented from being connected to other lines. Accordingly, the working fluid supplied from the manual priority switching unit 3 is supplied to the second automatic supplying mechanism 592 through the automatic supplying line 3a, and then the second automatic supplying mechanism 592 And may be supplied to the second cylinder 120b through the second automatic connection line 52.
  • the second automatic supply mechanism 592 and the second automatic discharge mechanism 591 may be disposed in parallel to each other with reference to an axial direction in which the second automatic steering valve 59 moves. 15 and 16, the second automatic supplying mechanism 592 may be disposed on the right side with respect to the second automatic discharging mechanism 591.
  • the second steering priority shuttle valve 76 is connected to a portion of the working fluid supplied to the first cylinder 120a through the first automatic connecting line 51 according to the automatic steering Or a part of the working fluid supplied to the second cylinder (120b) through the second automatic connection line (52) is transmitted to the steering priority valve (71) through the first steering priority line (72) 1 steering priority line 72, as shown in FIG.
  • the working fluid flows through the first automatic connecting line 51, And reaches the point where the first steering priority line 72 is connected, a part of the steering torque is branched to the first steering priority line 72 and passes through the second steering priority shuttle valve 76, 1 steering priority shuttle valve 75 to the steering priority valve 71 via the second steering priority line 73.
  • the steering priority valve 71 is connected to the steering control valve 71 through the steering discharge line 7a using a part of the working fluid supplied to the first cylinder 120a via the first automatic steering valve 58, Can be moved to block the discharge of working fluid to the discharge line (6).
  • the working fluid flows through the second automatic connecting line 52, And reaches the point where the first steering priority line 72 is connected, a part of the steering torque is branched to the first steering priority line 72 and passes through the second steering priority shuttle valve 76, 1 steering priority shuttle valve 75 to the steering priority valve 71 via the second steering priority line 73.
  • the steering priority valve 71 is connected to the outside of the vehicle through the steering discharge line 7a using a part of the working fluid supplied to the second cylinder 120b via the second automatic steering valve 59, Can be moved to block the discharge of working fluid to the discharge line (6).
  • the operating fluid is not supplied to the first cylinder 120a through the first automatic steering valve 58 and the second automatic steering valve 59 is operated,
  • the working fluid is not supplied to the second cylinder 120b.
  • the working fluid does not flow in the first automatic connecting line 51, the second automatic connecting line 52, the first steering priority line 72, and the second steering priority line 73 .
  • the steering priority valve 71 can be moved to allow the working fluid supplied from the steering pump 2 to be discharged to the external discharge line 6.
  • the steering priority valve (71) allows the working fluid supplied from the steering pump (2) to pass, thereby allowing the working fluid to be discharged to the external discharge line (6). Accordingly, a working fluid can be supplied to the external device 200.
  • the automatic steering unit 5 includes the first automatic steering valve 58 and the second automatic steering valve 59
  • the steering priority unit 7 includes the second steering priority
  • a part of the working fluid supplied to the steering cylinder 120 is transmitted to the steering priority valve 71 by using the shuttle valve 76
  • the supply mechanism 582, the second automatic discharge mechanism 591, and the second automatic supply mechanism 592 may be configured to include three connection ports, respectively.
  • the hydraulic steering apparatus 1 of the agricultural working vehicle may include a first module body 1a and a second module body 1b.
  • the first module body 1a may be provided with the manual steering valve 43.
  • the manual steering valve 43 may be connected to the steering pump 2 located outside the first module body 1a through the manual branch line 22.
  • a part of the passive branch line 22 may be disposed outside the first module body 1a and a part of the passive branch line 22 may be disposed inside the first module body 1a.
  • a part of the structure of the manual steering unit 4 may be installed in the first module body 1a.
  • the second module main body 1b may be provided with the manual priority switching valve 31 and the automatic steering valve 57.
  • the manual priority switching valve 31 may be connected to the steering pump 2 located outside the second module body 1b through the automatic branch line 23. [ A part of the automatic branch line 23 may be disposed outside the second module body 1b and the rest may be disposed inside the second module body 1b.
  • the second module main body 1b may be provided with all the components of the manual priority switching unit 3.
  • the automatic steering valve 57 may be installed in the second module main body 1b so as to be connected to the manual priority switching valve 31 provided in the second module main body 1b.
  • the second module main body 1b may be provided with all the components of the automatic steering unit 5.
  • the automatic steering unit 5 and the manual priority switching unit 3 may be connected to each other through an internal flow path disposed inside the second module main body 1b.
  • the automatic steering valve 48 may be connected to the steering cylinder 120 located outside the second module body 1b through the steering line 140.
  • a part of the steering line 140 may be disposed outside the second module body 1b and a part of the steering line 140 may be disposed inside the second module body 1b.
  • a manual steering valve 43 installed in the first module body 1a may be connected to the steering line 140 inside the second module body 1b.
  • a part of the structure of the manual steering unit 4 may be installed in the second module body 1b.
  • the second module main body 1b may be provided with other components of the manual steering unit 4, other than the manual steering valve 43.
  • the steering priority valve 71 may be additionally provided in the second module body 1b.
  • the steering priority valve 71 may be connected to the steering pump 2 located outside the second module body 1b through the automatic branch line 23.
  • the steering priority valve 71 may be connected to an external device 200 (shown in FIG. 16) located outside the second module main body 1b through the external discharge line 6.
  • a part of the external discharge line 6 may be disposed outside the second module body 1b and a part of the external discharge line 6 may be disposed inside the second module body 1b.
  • the second module main body 1b may be provided with all of the components of the steering preferential unit 7.
  • the second module body 1b and the first module body 1a may be arranged to be in contact with each other.
  • the manual priority switching unit 3, the manual steering unit 4, and the automatic steering unit 5 are provided with an internal flow path disposed inside the second module main body 1b, Through the internal flow path disposed inside the first chamber 1a.
  • the second module body 1b and the first module body 1a may be spaced apart from each other.
  • the second module main body 1b and the first module main body 1a may be connected to each other through an external flow path 1c disposed on the outside.
  • the manual steering unit 4 is connected to the first module main body 1a through an internal flow path disposed inside the first module main body 1a, the external flow path 1c, and an internal flow path disposed inside the second module main body 1b. And can be connected to the manual priority switching unit 3.
  • the manual priority switching unit 3 may be connected to the automatic steering unit 5 through an internal flow path disposed inside the second module body 1b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Guiding Agricultural Machines (AREA)

Abstract

La présente invention concerne un mécanisme de direction hydraulique pour un véhicule agricole, comprenant : une pompe de direction pour fournir un fluide de travail ; une unité de direction manuelle qui est reliée à la pompe de direction et, lorsqu'une direction manuelle est réalisée par manipulation d'un volant de direction, qui modifie la direction de conduite d'un véhicule agricole au moyen du fluide de travail fourni à partir de la pompe de direction ; une unité de direction automatique qui, lorsqu'une direction automatique est effectuée par une unité de commande, modifie la direction de conduite du véhicule agricole au moyen du fluide de travail fourni à partir de la pompe de direction ; une unité de commutation préférentielle manuelle reliée à chacune de la pompe de direction et de l'unité de direction automatique de telle sorte que le fluide de travail fourni à partir de la pompe de direction est sélectivement fourni à l'unité de direction automatique, selon le fait que la direction manuelle est réalisée ou non ; une ligne de décharge externe pour décharger, vers un dispositif externe, le fluide de travail fourni à partir de la pompe de direction ; et une unité préférentielle de direction reliée à chacune de la pompe de direction et de la ligne de décharge externe de telle sorte que le fluide de travail fourni à partir de la pompe de direction est sélectivement déchargé vers la ligne de décharge externe.
PCT/KR2019/000682 2018-01-23 2019-01-17 Mécanisme de direction hydraulique pour véhicule agricole WO2019146957A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20180008510 2018-01-23
KR10-2018-0008510 2018-01-23
KR1020190005197A KR20190089736A (ko) 2018-01-23 2019-01-15 농업용 작업차량의 유압식 조향장치
KR10-2019-0005197 2019-01-15

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WO2019146957A1 true WO2019146957A1 (fr) 2019-08-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4163186A1 (fr) * 2021-10-07 2023-04-12 Weber-Hydraulik Gmbh Pompe hydraulique ou pneumatique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08207807A (ja) * 1994-11-04 1996-08-13 Caterpillar Inc 自動式機械の操舵制御装置
JP2666539B2 (ja) * 1990-08-10 1997-10-22 トヨタ自動車株式会社 車両用自動操向装置
KR100230051B1 (ko) * 1996-12-31 1999-11-15 오상수 자동 조향장치
JP2003118615A (ja) * 2001-10-15 2003-04-23 Bio Oriented Technol Res Advancement Inst 農作業機の操向装置
JP2017190119A (ja) * 2016-04-13 2017-10-19 ダンフォス・パワー・ソリューションズ・エイピイエス 油圧操舵装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2666539B2 (ja) * 1990-08-10 1997-10-22 トヨタ自動車株式会社 車両用自動操向装置
JPH08207807A (ja) * 1994-11-04 1996-08-13 Caterpillar Inc 自動式機械の操舵制御装置
KR100230051B1 (ko) * 1996-12-31 1999-11-15 오상수 자동 조향장치
JP2003118615A (ja) * 2001-10-15 2003-04-23 Bio Oriented Technol Res Advancement Inst 農作業機の操向装置
JP2017190119A (ja) * 2016-04-13 2017-10-19 ダンフォス・パワー・ソリューションズ・エイピイエス 油圧操舵装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4163186A1 (fr) * 2021-10-07 2023-04-12 Weber-Hydraulik Gmbh Pompe hydraulique ou pneumatique

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