CN115126736A - Walking deviation-rectifying hydraulic system of skid-steer loader and control method - Google Patents
Walking deviation-rectifying hydraulic system of skid-steer loader and control method Download PDFInfo
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- CN115126736A CN115126736A CN202210746209.7A CN202210746209A CN115126736A CN 115126736 A CN115126736 A CN 115126736A CN 202210746209 A CN202210746209 A CN 202210746209A CN 115126736 A CN115126736 A CN 115126736A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/18—Combined units comprising both motor and pump
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a walking deviation-correcting hydraulic system of a skid steer loader and a control method, wherein the system comprises a walking pump I, a walking pump II, a walking motor I, a walking motor II, an electromagnetic directional valve I, an electromagnetic directional valve II, a synchronous flow divider valve, a pilot handle, an electric control button, a hydraulic oil tank, a walking pump variable piston I and a walking pump variable piston II, oil inlets and oil outlets of the walking pump I and the walking motor I are respectively connected to form a hydrostatic closed loop, and oil inlets and oil outlets of the walking pump II and the walking motor II are respectively connected to form a hydrostatic closed loop; an inlet V port of the synchronous flow divider is connected with an a1 port of the electromagnetic directional valve I and a b1 port of the electromagnetic directional valve II, and outlets C1 and C2 of the synchronous flow divider are respectively connected with inlets K1 and K2 of the pressure compensation valve; outlets N1 and N2 of the pressure compensation valve are respectively connected with inlets of a walking motor I and a walking motor II, and an electric control button on a pilot-operated pilot handle controls the electromagnetic reversing valve I and the electromagnetic reversing valve II to be electrified and reversed.
Description
Technical Field
The invention relates to a walking deviation-rectifying hydraulic system of a skid steer loader and a control method, belonging to the technical field of engineering machinery and industrial vehicles.
Background
The skid steer loader is a wheel type special chassis device which realizes vehicle steering by utilizing linear velocity difference of wheels at two sides. The device is mainly used for occasions with narrow operation places, uneven ground and frequent operation content change. In order to realize speed difference steering of the skid steer loader, a walking system is required to be composed of two mutually independent closed hydrostatic systems, and two walking motors are independently controlled by two walking pumps respectively. Based on the walking system with the structure, if the displacement of the two walking pumps is different, the provided flow is inconsistent, the rotating speeds of the two walking motors on the left side and the right side of the vehicle cannot be kept consistent, and thus the long-time straight walking cannot be kept in the process of advancing and retreating the vehicle. Under some working conditions of straight-line walking operation, a driver needs to repeatedly adjust the driving direction, and the operation burden is increased.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a walking deviation-correcting hydraulic system of a skid steer loader and a control scheme, and solves the problem that in the prior art, due to the fact that two closed hydrostatic systems are independent, when the displacement of a walking pump is different, a vehicle cannot keep straight walking. In order to achieve the above object, the present invention adopts the following technical solutions:
a walking deviation-rectifying hydraulic system of a skid steer loader comprises a walking pump I, a walking pump II, a walking motor I, a walking motor II, an electromagnetic directional valve I, an electromagnetic directional valve II, a synchronous flow divider valve, a pilot handle, an electric control button, a hydraulic oil tank, a walking pump variable piston I and a walking pump variable piston II;
an inlet of the walking motor I is connected with an a2 port of the electromagnetic directional valve I, a P1 port of the electromagnetic directional valve I is connected with an outlet of the walking pump I, and an inlet of the walking pump I is connected with an outlet of the walking motor I;
an inlet of the traveling motor II is connected with a port b2 of the electromagnetic directional valve II, a port P2 of the electromagnetic directional valve II is connected with an outlet of the traveling pump II, and an inlet of the traveling pump II is connected with an outlet of the traveling motor II;
an inlet V port of the synchronous diverter valve is connected with an a1 port of the electromagnetic directional valve I and a b1 port of the electromagnetic directional valve II, and C1 and C2 ports of the synchronous diverter valve are respectively connected with inlets of the walking motor I and the walking motor II;
the port P of the pilot-controlled pilot handle is connected with a pilot oil source to provide pilot oil, the port T is connected with a hydraulic oil tank, the port D is connected with a port IX 4 of a variable piston I of the walking pump, the port C is connected with a port IIY 4 of the variable piston II of the walking pump, the port F is connected with a port IX 3 of the variable piston I of the walking pump, and the port E is connected with a port IIY 3 of the variable piston II of the walking pump;
and the electric control button controls the electrification and the reversing of the electromagnetic reversing valve I and the electromagnetic reversing valve II.
Further, the foregoing also includes a pressure compensating valve;
the inlets K1 and K2 of the pressure compensation valve are respectively connected with the ports C1 and C2 of the synchronous flow divider valve;
outlets N1 and N2 of the pressure compensation valve are respectively connected with inlets of a walking motor I and a walking motor II.
Furthermore, the device also comprises a one-way valve I and a one-way valve II,
the inlet of the one-way valve I is connected with the outlet N1 of the pressure compensation valve, and the outlet of the one-way valve I is connected with the inlet of the walking motor I;
and the inlet of the check valve II is connected with the outlet N2 of the pressure compensation valve, and the outlet of the check valve II is connected with the inlet of the walking motor II 4.
Furthermore, the device also comprises a controller, a pressure switch I, a pressure switch II, a pressure switch III and a pressure switch IV;
the pressure switch I, the pressure switch II, the pressure switch III and the pressure switch IV are respectively connected with an D, C, F, E port of the pilot handle;
the controller is respectively connected with the pressure switch I, the pressure switch II, the pressure switch III, the pressure switch IV and the electric control button.
Furthermore, the electromagnetic directional valve I and the electromagnetic directional valve II are two-position three-way electromagnetic valves.
A walking deviation rectifying control method of a skid steer loader applies any one of the walking deviation rectifying hydraulic systems of the skid steer loader, and comprises the following steps:
in response to the fact that the pressure of a port D and a port E of the pilot handle is detected to be 0 at the same time, or when the pressure of a port C and the pressure of a port F are detected to be 0 at the same time, the controller controls the electromagnetic directional valve I and the electromagnetic directional valve II to be electrified and switched, so that the inlet flow rates of the walking motor I and the walking motor II are the same, and the purpose of straight walking is achieved;
otherwise, the walking pump I and the walking pump II respectively and independently control the walking motor I and the walking motor II, and steering is realized through the speed difference of the motors on the two sides.
Furthermore, the electric control button on the pilot handle is used for controlling the electrification and the reversing of the electromagnetic directional valve I and the electromagnetic directional valve II, so that the flow rates of the walking motor I and the walking motor II are the same, and the purpose of straight walking is achieved.
Furthermore, the priority of the operation of controlling the power-on and the direction-changing of the electromagnetic directional valve I and the electromagnetic directional valve II by the electric control button is higher than the execution operation of the controller based on the pressure of the port C, the port D, the port E and the port F of the pilot handle.
The invention achieves the following beneficial effects:
1. by adopting the invention, two originally mutually independent closed hydrostatic systems are connected for flow redistribution, so that the flow entering the two motors can be kept consistent, and the straight-line running of the vehicle is ensured;
2. the flow redistribution is divided into automatic and manual control states, and a driver can switch randomly according to actual working conditions, so that the flexibility and the convenience of operation are improved.
3. The steering of the skid steer loader is realized by the side line speed difference of the wheels, and the invention realizes the steering control at any time and the linear walking control on the premise of not changing the prior operation habit;
4. the scheme of the invention is provided with the pressure compensation valve, so that the system has a pressure compensation function, the linear velocity of the tires can be ensured to be the same when the resistance borne by the tires on two sides is inconsistent, and the anti-interference performance and the practicability of the linear traveling control are improved.
Drawings
FIG. 1 is a schematic diagram of a walking deviation rectifying hydraulic system of the present invention.
The meaning of the reference symbols in the figures: 1-a walking pump I; 2-a walking pump II; 3-a walking motor I; 4-a walking motor II; 5-an electromagnetic directional valve I; 6-an electromagnetic directional valve II; 7-synchronous diverter valve; 8-a one-way valve I; 9-one-way valve II; 10-a pilot handle; 11-a controller; 12-a pressure switch I; 13-pressure switch II; 14-pressure switch III; 15-pressure switch IV; 16-an electronic control button; 17-a pressure compensation valve; 18-a hydraulic oil tank; 19-variable piston I of walking pump; 20-variable piston II of walking pump.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example one
With reference to fig. 1 (only the forward oil path diversion control scheme is drawn in detail in the present schematic diagram, and the backward control scheme is completely the same as the forward control scheme), the present embodiment discloses a walking deviation correction hydraulic system for a skid steer loader, comprising:
the traveling pump I1, the electromagnetic directional valve I5 and the traveling motor I3 are sequentially connected to form a hydrostatic closed loop, an inlet of the traveling motor I3 is connected with an a2 port of the electromagnetic directional valve I5, a P1 port of the electromagnetic directional valve I5 is connected with an outlet of the traveling pump I1, an inlet of the traveling pump I1 is connected with an outlet of the traveling motor I3, and the electromagnetic directional valve I5 is a 2-position 3-way valve;
the walking pump II 2, the electromagnetic directional valve II 6 and the walking motor II 4 are sequentially connected to form a hydrostatic closed loop, an inlet of the walking motor II 4 is connected with a port b2 of the electromagnetic directional valve II 6, a port P2 of the electromagnetic directional valve II 6 is connected with an outlet of the walking pump II 2, an inlet of the walking pump II 2 is connected with an outlet of the walking motor II 4, and the electromagnetic directional valve II 6 is a 2-position 3-way valve.
An inlet V port of the synchronous flow divider valve 7 is connected with an a1 port of the electromagnetic directional valve I5 and a b1 port of the electromagnetic directional valve II 6, and outlets C1 and C2 of the synchronous flow divider valve 7 are respectively connected with inlets K1 and K2 of the pressure compensation valve 17; outlets N1 and N2 of the pressure compensation valve 17 are respectively connected with inlets of a walking motor I3 and a walking motor II 4. The pressure compensation valve 17 is used for ensuring that the flow rate of the synchronous flow divider 7 is consistent when the walking resistance of the walking motor I3 and the walking resistance of the walking motor II 4 are different.
The inlet of the one-way valve I8 is connected with the outlet N1 of the pressure compensation valve 17, and the outlet of the one-way valve I8 is connected with the inlet of the walking motor I3. The inlet of the one-way valve II 9 is connected with the outlet N2 of the pressure compensation valve 17, and the outlet of the one-way valve II 9 is connected with the inlet of the walking motor II 4. The one-way valves I8 and II 9 prevent hydraulic oil of the walking motors I3 and II 4 from flowing to the synchronous flow divider valve 7.
The P port of the pilot control pilot handle 10 is provided with pilot oil by a pilot oil source, the T port returns to the hydraulic oil tank 18, the D port is connected with the X4 port of the traveling pump variable piston I19, the C port is connected with the Y4 port of the traveling pump variable piston II 20, the F port is connected with the X3 port of the traveling pump variable piston I19, and the E port is connected with the Y3 port of the traveling pump variable piston II 20.
The controller 11 is respectively connected with a pressure switch I12, a pressure switch II 13, a pressure switch III 14, a pressure switch IV 15 and an electric control button 16.
The pressure switch I12, the pressure switch II 13, the pressure switch III 14 and the pressure switch IV 15 are respectively connected with the D, C, F, E ports of the pilot handle 10.
When the electromagnetic directional valve I5 and the electromagnetic directional valve II 6 are not electrified, the oil passages of the walking pump I1 and the walking motor I3 are directly communicated, and the oil passages of the walking pump II 2 and the walking motor II 4 are directly communicated;
when the electromagnetic directional valve I5 is in a power-on state, the electromagnetic directional valve I5 and the electromagnetic directional valve II 6 are connected with a V port of the synchronous diverter valve 7, and C1 and C2 ports of the synchronous diverter valve 7 are respectively communicated with inlets K1 and K2 of the pressure compensation valve 17; outlets N1 and N2 of the pressure compensation valve 17 are respectively communicated with an inlet of a walking motor I3 and an inlet of a walking motor II 4. And the electromagnetic valves I5 and II 6 are simultaneously switched on/off.
Example two
A walking deviation rectifying control method of a skid steer loader adopts a walking deviation rectifying hydraulic system of the skid steer loader in the first embodiment, and comprises the following steps:
when the vehicle engine is started;
oil inlets and oil outlets of the walking pump I1 and the walking motor I3 are respectively communicated with oil to form a hydrostatic closed loop;
oil inlets and oil outlets of the walking pump II 2 and the walking motor II 4 are respectively communicated with oil to form a hydrostatic closed loop;
the pilot-controlled pilot handle 10 is connected with pilot oil of a pilot oil source through a port P, and a port T returns to the hydraulic oil tank 18;
at the moment, the electromagnetic directional valve I5 and the electromagnetic directional valve II 6 are in a power-off state;
the first working state: a driver normally operates the hydraulic control pilot handle 10 to control the vehicle to move forwards, backwards and turn left and right, 4 control oil ports C, D, E and F of the hydraulic control pilot handle 10 are respectively provided with a pressure switch, wherein the C controls the walking motor I3 to move forwards, the D controls the walking motor II 4 to move backwards, the E controls the walking motor I3 to move backwards, and the F controls the walking motor II 4 to move forwards. When the pressures of the port D and the port E are detected to be 0 simultaneously or when the pressures of the port C and the port F are detected to be 0 simultaneously, the skid steer loader is in a forward or backward driving state at the moment, the controller 11 automatically controls the power-on reversing of the electromagnetic reversing valve I5 and the electromagnetic reversing valve II 6, the flow rates of the walking pump I1 and the walking pump II 2 enter the synchronous diverter valve 7V port simultaneously, the synchronous diverter valve is communicated with the inlets K1 and K2 of the pressure compensation valve 17 through the ports C1 and C2 and is diverted into the same flow rate through compensation, the outlets N1 and N2 of the pressure compensation valve 17 are respectively connected with the inlet of the walking motor I3 and the inlet of the walking motor II 4, so that the inlet flow rates of the walking motor I3 and the walking motor II 4 are the same, and the purpose of linear walking is achieved.
When the pressure of the port D and the port E is detected to be not 0 at the same time or when the pressure of the port C and the port F is detected to be not 0 at the same time, the skid steer loader is in a state of needing to turn, and the electromagnetic directional valve I5 and the electromagnetic directional valve II 6 cannot be electrified for reversing. The traveling pump I1 and the traveling pump II 2 respectively and independently control the traveling motor I3 and the traveling motor II 4 without passing through a synchronous flow divider 7V port, and at the moment, the vehicle can realize steering through the speed difference of the motors on the two sides.
In the second working state, when the driver confirms that the linear operation is required, the driver controls the electromagnetic directional valve I5 and the electromagnetic directional valve II 6 to be electrified and switched through the electric control button 16 on the pilot handle 10, at the moment, hydraulic oil of the traveling pump I1 and the traveling pump II 2 simultaneously enters the V port of the synchronous flow dividing valve 7, is communicated with inlets K1 and K2 of the pressure compensation valve 17 through C1 and C2 ports, and is divided into the same flow through compensation, outlets N1 and N2 of the pressure compensation valve 17 are respectively connected with an inlet of the traveling motor I3 and an inlet of the traveling motor II 4, so that the inlet flows of the traveling motor I3 and the traveling motor II 4 are the same, and the purpose of linear traveling is achieved.
In addition, the priority of the operation of the driver for controlling the electromagnetic directional valve I5 and the electromagnetic directional valve II 6 to be electrified and reversed through the electric control button 16 on the pilot handle 10 is higher than the execution operation of the controller 11 based on the pressure of the port C, the port D, the port E and the port F of the pilot handle 10.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, such as changing pilot operated handle 10 to an electrically controlled handle, or changing pressure switches i 12, ii 13, iii 14, iv 15 to travel switches, etc.
Claims (8)
1. A walking deviation rectifying hydraulic system of a skid steer loader is characterized by comprising a walking pump I (1), a walking pump II (2), a walking motor I (3), a walking motor II (4), an electromagnetic directional valve I (5), an electromagnetic directional valve II (6), a synchronous flow dividing valve (7), a pilot handle (10), an electric control button (16), a hydraulic oil tank (18), a walking pump variable piston I (19) and a walking pump variable piston II (20);
an inlet of the traveling motor I (3) is connected with an a2 port of the electromagnetic directional valve I (5), a P1 port of the electromagnetic directional valve I (5) is connected with an outlet of the traveling pump I (1), and an inlet of the traveling pump I (1) is connected with an outlet of the traveling motor I (3);
an inlet of the traveling motor II (4) is connected with a port b2 of the electromagnetic directional valve II (6), a port P2 of the electromagnetic directional valve II (6) is connected with an outlet of the traveling pump II (2), and an inlet of the traveling pump II (2) is connected with an outlet of the traveling motor II (4);
an inlet V port of the synchronous diverter valve (7) is connected with a port a1 of the electromagnetic directional valve I (5) and a port b1 of the electromagnetic directional valve II (6), and ports C1 and C2 of the synchronous diverter valve (7) are respectively connected with inlets of the walking motor I (3) and the walking motor II (4);
a port P of the hydraulic control pilot handle (10) is connected with a pilot oil source to provide pilot oil, a port T is connected with a hydraulic oil tank (18), a port D is connected with a port X4 of a variable piston I (19) of a walking pump, a port C is connected with a port Y4 of a variable piston II (20) of the walking pump, a port F is connected with a port X3 of the variable piston I (19) of the walking pump, and a port E is connected with a port Y3 of the variable piston II (20) of the walking pump;
and the electric control button (16) controls the electromagnetic directional valve I (5) and the electromagnetic directional valve II (6) to be electrified and switched.
2. The hydraulic system for correcting the walking error of the skid steer loader according to claim 1, further comprising a pressure compensating valve (17);
inlets K1 and K2 of the pressure compensation valve (17) are respectively connected with ports C1 and C2 of the synchronous flow divider valve (7);
outlets N1 and N2 of the pressure compensation valve (17) are respectively connected with inlets of a walking motor I (3) and a walking motor II (4).
3. The walking deviation-rectifying hydraulic system of the skid steer loader according to claim 2, further comprising a one-way valve I (8) and a one-way valve II (9),
an inlet of the one-way valve I (8) is connected with an outlet N1 of the pressure compensation valve (17), and an outlet of the one-way valve I (8) is connected with an inlet of the walking motor I (3);
and the inlet of the one-way valve II (9) is connected with the outlet N2 of the pressure compensation valve (17), and the outlet of the one-way valve II (9) is connected with the inlet of the walking motor II 4.
4. The walking deviation-correcting hydraulic system of the skid steer loader according to claim 1, further comprising a controller (11), a pressure switch I (12), a pressure switch II (13), a pressure switch III (14) and a pressure switch IV (15);
the pressure switch I (12), the pressure switch II (13), the pressure switch III (14) and the pressure switch IV (15) are respectively connected to an D, C, F, E port of the pilot handle (10);
and the controller (11) is respectively connected with the pressure switch I (12), the pressure switch II (13), the pressure switch III (14), the pressure switch IV (15) and the electric control button (16).
5. The walking deviation-rectifying hydraulic system of the skid steer loader according to claim 1, wherein the electromagnetic directional valve I (5) and the electromagnetic directional valve II (6) are two-position three-way electromagnetic valves.
6. A walking deviation rectifying control method of a skid steer loader is characterized in that the walking deviation rectifying hydraulic system of the skid steer loader according to any one of claims 1 to 5 is applied, and the method comprises the following steps:
in response to the fact that the pressure of a port D and a port E of a pilot handle (10) is received and detected to be 0 at the same time, or when the pressure of a port C and the pressure of a port F are detected to be 0 at the same time, a controller (11) controls an electromagnetic directional valve I (5) and an electromagnetic directional valve II (6) to be electrified and reversed, so that the inlet flow rates of a walking motor I (3) and a walking motor II (4) are the same, and the purpose of walking straight lines is achieved;
otherwise, the walking pump I (1) and the walking pump II (2) respectively and independently control the walking motor I (3) and the walking motor II (4), and steering is achieved through the speed difference of the motors on the two sides.
7. The walking deviation rectifying control method of the skid steer loader according to claim 6, further comprising controlling the electromagnetic directional valve I (5) and the electromagnetic directional valve II (6) to be electrified and reversed through an electric control button (16) on a pilot handle (10), so that the inlet flow rates of the walking motor I (3) and the walking motor II (4) are the same, and the purpose of straight walking is achieved.
8. The walking deviation rectifying control method of the skid steer loader according to claim 7, wherein the priority of the operation of the electric control button (16) for controlling the power-on reversing of the electromagnetic directional valve I (5) and the electromagnetic directional valve II (6) is higher than the execution operation of the controller (11) based on the pressure of the port C, the port D, the port E and the port F of the pilot handle (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210746209.7A CN115126736B (en) | 2022-06-29 | 2022-06-29 | Walking deviation correcting hydraulic system of skid steer loader and control method |
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| CN202210746209.7A CN115126736B (en) | 2022-06-29 | 2022-06-29 | Walking deviation correcting hydraulic system of skid steer loader and control method |
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| CN115126736B CN115126736B (en) | 2023-06-06 |
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| FR3057917A1 (en) * | 2016-10-25 | 2018-04-27 | Poclain Hydraulics Industrie | HYDRAULIC CIRCUIT WITH FLOW DIVIDER DRIVER |
| CN111255758A (en) * | 2020-03-26 | 2020-06-09 | 徐州徐工特种工程机械有限公司 | Electric control hydraulic system for preventing sliding machinery from deviating and control method |
| CN112160369A (en) * | 2020-09-14 | 2021-01-01 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator linear walking system, excavator and control method |
| CN114525825A (en) * | 2022-02-23 | 2022-05-24 | 三一重机有限公司 | Sliding machine, and sliding machine walking control system and method |
-
2022
- 2022-06-29 CN CN202210746209.7A patent/CN115126736B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5427195A (en) * | 1994-05-04 | 1995-06-27 | Int. Silvatech Ltd. | Hydraulic drive and steering systems for a vehicle |
| CN2665225Y (en) * | 2003-12-11 | 2004-12-22 | 三一重工股份有限公司 | Walking control apparatus for full-hydraulic bulldozer |
| CN201792744U (en) * | 2010-08-31 | 2011-04-13 | 三一重工股份有限公司 | Single-pump dual-motor driving engineering vehicle and hydraulic system and control device thereof |
| CN205401281U (en) * | 2016-02-19 | 2016-07-27 | 卡特彼勒（青州）有限公司 | Closed -type hydraulic system and including this closed -type hydraulic system's machine |
| FR3057917A1 (en) * | 2016-10-25 | 2018-04-27 | Poclain Hydraulics Industrie | HYDRAULIC CIRCUIT WITH FLOW DIVIDER DRIVER |
| CN111255758A (en) * | 2020-03-26 | 2020-06-09 | 徐州徐工特种工程机械有限公司 | Electric control hydraulic system for preventing sliding machinery from deviating and control method |
| CN112160369A (en) * | 2020-09-14 | 2021-01-01 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator linear walking system, excavator and control method |
| CN114525825A (en) * | 2022-02-23 | 2022-05-24 | 三一重机有限公司 | Sliding machine, and sliding machine walking control system and method |
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| CN115126736B (en) | 2023-06-06 |
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