WO2014082530A1 - 电控多模式转向阀、转向液控系统以及轮式起重机 - Google Patents
电控多模式转向阀、转向液控系统以及轮式起重机 Download PDFInfo
- Publication number
- WO2014082530A1 WO2014082530A1 PCT/CN2013/087187 CN2013087187W WO2014082530A1 WO 2014082530 A1 WO2014082530 A1 WO 2014082530A1 CN 2013087187 W CN2013087187 W CN 2013087187W WO 2014082530 A1 WO2014082530 A1 WO 2014082530A1
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- WIPO (PCT)
- Prior art keywords
- valve
- steering
- ports
- mode
- electromagnetic reversing
- Prior art date
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Classifications
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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
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B13/0446—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors with moving coil, e.g. voice coil
-
- 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
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
-
- 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
- B62D5/065—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
-
- 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
- B62D5/09—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by means for actuating valves
- B62D5/091—Hydraulic steer-by-wire systems, e.g. the valve being actuated by an electric motor
-
- 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
- B62D5/20—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
- B62D7/14—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering
- B62D7/15—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels
- B62D7/1509—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels with different steering modes, e.g. crab-steering, or steering specially adapted for reversing of the vehicle
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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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0846—Electrical details
- F15B13/085—Electrical controllers
-
- 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
- B62D5/09—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by means for actuating valves
- B62D5/091—Hydraulic steer-by-wire systems, e.g. the valve being actuated by an electric motor
- B62D5/092—Hydraulic steer-by-wire systems, e.g. the valve being actuated by an electric motor the electric motor being connected to the final driven element of the steering gear, e.g. rack
Definitions
- the invention relates to the field of engineering machinery, in particular to an electronically controlled multi-mode steering valve, a steering hydraulic control system and a wheeled crane. Background technique
- the multi-mode steering here refers to the various steering modes of the vehicle.
- Common steering modes are: front axle (front group) independent steering, rear axle (rear group) independent, small turning (also called coordinated) steering, crab steering, etc. .
- front axle front group
- rear axle rear group
- small turning also called coordinated
- crab steering etc.
- the steering directions of the front and rear wheels are reversed, so that the minimum turning radius can be achieved, so it is called a small turning steering.
- the crab is turning, the steering directions of the front and rear wheels are the same, which can be realized.
- the crab walks like a sport, so it is said that the crab line is turning.
- Figure 1 shows a schematic diagram of four common steering modes.
- the implementation of this multi-mode steering is generally manual and electronically controlled.
- a manually controlled multi-mode steering valve is generally available.
- the steering principle of a multi-mode steering valve is shown in Figure 2.
- the hydraulic steering gear a3 When the driver operates the steering wheel a4, the hydraulic steering gear a3 outputs the hydraulic oil supplied from the steering pump from the A port or the B port according to the left and right rotation of the steering wheel, and then enters the front group steering cylinder a1 and the rear through the multi-mode steering valve a2 connected in series.
- the group turns to the cylinder a5 to push the wheels to rotate left and right.
- the hydraulic oil output from the steering gear passes only the front group steering cylinder to realize the front axle independent steering function; when the spool of the multi-mode steering valve a2 is on the left side In the second position, the hydraulic oil output from the steering gear sequentially passes through the front group steering cylinder and the rear group steering cylinder to push the wheel to rotate.
- the front and rear group wheels rotate in opposite directions to realize a small turning steering function;
- the multi-mode steering valve a2 When the spool is in the third position on the left side, the hydraulic oil output from the steering gear is only After the rear group steering cylinder, the rear axle independent steering function is realized;
- the spool of the multi-mode steering valve a2 is in the fourth position on the left side, the hydraulic oil output from the steering gear passes through the front group steering cylinder and the rear group steering cylinder in turn, pushing the wheel Rotating, at this time, the front and rear group wheels rotate in the same direction to realize the crab steering function.
- the electro-hydraulic proportional control and the solenoid valve control can be used for the electronic control mode.
- the principle of the electro-hydraulic proportional control multi-mode steering system is shown in Figure 3.
- the front group of wheels is controlled by the driver by steering the steering wheel.
- the rotation angle of each wheel outputs different electric signals according to the rotation angle of a certain wheel of the front group and the steering mode selected by the driver through the program set in the controller, thereby controlling the opening degree of the electro-hydraulic proportional valve and the flow rate of the hydraulic oil.
- the steering cylinder is driven to rotate the wheel according to the driver's intention to realize the multi-mode steering function.
- the corners of the wheels are detected by an encoder on the axle.
- the principle of the parallel multi-mode steering scheme controlled by the solenoid valve is shown in Figure 4.
- the valve position switching of the solenoid valve is used to perform multi-mode selection.
- the shunting and collecting valve is used to realize the parallel operation of the front and rear axle cylinders.
- the three existing multi-mode steering schemes given above have some degree of defects.
- the manually operated multi-mode steering valve shown in FIG. 2 is switched to the small turning and the crab steering position (ie, the valve body is in the second position and the fourth position on the left side), the front and rear group steering hydraulic cylinders Forming a series structure, when the pressure provided by the hydraulic system pushes the front axle to steer, the remaining pressure can also push the rear axle to turn, which will cause the pressure of the front group steering cylinder to be too large, and the sealing requirement is high, and at the same time
- the manually operated switching valve itself has a complicated structure, and the spool function is special, so the cost is high.
- the double-split parallel multi-mode steering valve shown in Fig. 4 uses two shunt collector valves, which causes a large system pressure loss.
- the oil output through the steering gear only partially flows into the front (rear) group steering cylinder, and half or more of the oil is wasted, and at the same time,
- the diverter manifold cannot achieve normal shunt due to less oil output from the diverter, and it is prone to small angle steering without action, while at high speed, it often needs small The angle corrects the direction, so this defect will seriously affect driving safety.
- the object of the present invention is to provide an electronically controlled multi-mode steering valve, a steering hydraulic control system and a wheeled crane, which can realize multi-mode steering of an engineering vehicle, and is reliable in operation and low in cost.
- the present invention provides an electronically controlled multi-mode steering valve, comprising: a split manifold, a first electromagnetic reversing valve, and a second electromagnetic reversing valve, the valve body of the electronically controlled multi-mode steering valve
- the valve port includes four sets of valves, the split flow collecting valve has a collecting port, a first dividing port and a second dividing port, and the first electromagnetic reversing valve and the second electromagnetic reversing valve each have a first oil a first port, a second port, and a third port, wherein the first ports of the first electromagnetic reversing valve and the second electromagnetic reversing valve are respectively in communication with the first group of valve ports of the valve body, a second port of the electromagnetic reversing valve and the second electromagnetic reversing valve respectively communicate with a second group of valve ports of the valve body, a third port of the first electromagnetic reversing valve and the diverter set a flow port of the flow valve is communicated, and a first branch port of the split flow valve and
- the electronically controlled multi-mode steering valve has a first electric power by switching a first working mode and a second working mode realized by the magnetic reversing valve and the second electromagnetic reversing valve, in the first working mode, the first set of valve ports of the valve body and the second set of valves
- the oil port is in communication; in the second working mode, the first group of valve ports of the valve body are in communication with the third group of valve ports and the fourth group of valve ports.
- a third electromagnetic reversing valve is further provided, the third electromagnetic reversing valve has two pairs of oil ports, the second diversion port of the diverting flow collecting valve and the second electromagnetic reversing valve The three oil ports are respectively communicated with the first group of oil ports of the third electromagnetic reversing valve, and the second group of oil ports of the third electromagnetic reversing valve are communicated with the fourth group of valve ports of the valve body .
- the electronically controlled multi-mode steering valve further has a third working mode realized by switching the first electromagnetic reversing valve, the second electromagnetic reversing valve and the third electromagnetic reversing valve, in the third working In the mode, the first group of valve ports of the valve body are in communication with the third group of valve ports and the fourth group of valve ports, and the first group of valve ports and the fourth group of valve oils The direction of oil flow in the port is different from the direction of oil flow in the second mode of operation.
- the fourth electromagnetic reversing valve has two pairs of oil ports, the first group of valve body ports of the valve body and the fourth electromagnetic reversing valve The first group of ports communicates with each other, and the second group of ports of the fourth electromagnetic reversing valve are respectively in communication with the first ports of the first electromagnetic reversing valve and the second electromagnetic reversing valve.
- the electronically controlled multi-mode steering valve further has a fourth working mode realized by switching the first electromagnetic reversing valve, the second electromagnetic reversing valve and the fourth electromagnetic reversing valve, in the fourth work
- the first group of valve ports of the valve body communicate with the second group of valve ports
- the oil flow direction of the first group of valve ports and the second group of valve ports The direction of oil flow in the first mode of operation is different.
- first electromagnetic reversing valve and the second electromagnetic reversing valve are both Three-way electromagnetic reversing valve.
- the third electromagnetic reversing valve and the fourth electromagnetic reversing valve are two-position four-way electromagnetic steering valves.
- the present invention provides a steering hydraulic control system comprising: a steering wheel, a full hydraulic steering gear, a safety valve group, a first group of independent steering cylinders and a second group of independent steering cylinders, the full hydraulic steering gear having The two groups of oil ports, the first group of oil ports of the full hydraulic steering gear respectively establish a system circuit with the pressure circuit and the oil return circuit, and further comprising the aforementioned electronically controlled multi-mode steering valve, the electronically controlled multi-mode steering valve a first set of valve ports of the valve body communicate with a second set of ports of the full hydraulic steering gear, a second set of valve ports of the valve body of the electronically controlled multi-mode steering valve and the first set of independent steering
- the cylinders are in communication, and the third group of valve ports and the fourth group of valve ports of the valve body of the electronically controlled multi-mode steering valve are independently steered by the safety valve group and the first group of independent steering cylinders and the second group respectively The cylinders are connected.
- the present invention provides a wheeled crane comprising: a vehicle body and a cab, the vehicle body having two sets of wheels, the cab being provided with a steering wheel and a multi-mode electronically controlled selector switch, wherein
- the steering wheel is connected to a full hydraulic steering gear in the steering hydraulic control system, and the two sets of wheels are respectively associated with a first set of independent steering cylinders and a second group in the steering hydraulic control system
- An independent steering cylinder is connected, and the multi-mode electronically controlled selector switch is connected to an electromagnetic reversing valve in the electronically controlled multi-mode steering valve in the steering hydraulic control system, and the multi-mode electronically controlled selector switch selects different working modes by The electromagnetic reversing valve in the electronically controlled multi-mode steering valve issues a corresponding switching signal.
- the electronically controlled multi-mode steering valve of the present invention realizes switching between two modes of independent commutation and non-independent commutation through the first electromagnetic reversing valve and the second electromagnetic reversing valve, and is driven in a non-independent manner.
- the input of the pressure oil is adjusted to the parallel input of the two independent steering cylinders through the diverting flow collecting valve, so that the steering pressures of the two independent steering cylinders do not affect each other, and the existing two sets of cylinder pressure series structure are avoided.
- the accumulated pressure caused by the lowering effectively reduces the pressure of the steering system and improves the reliability of the system.
- the pressure oil does not need to pass through the diverter manifold, and all flows into one of the independent steering cylinders, thus avoiding
- the existing oil waste by the silent split flow collecting valve method also avoids the phenomenon that the small angle steering cannot be corrected, and effectively improves the system energy utilization and driving safety.
- the electronically controlled multi-mode steering valve of the invention is relatively simple in structure realization, and the required electromagnetic reversing valve and the diverting manifold are all conventional valve members, which are easy to obtain and low in cost.
- a third electromagnetic reversing valve is added to the electronically controlled multi-mode steering valve, and the direction of the pressure oil respectively input to the two independent steering cylinders is changed by the third electromagnetic reversing valve to realize non-independent replacement.
- the fourth electromagnetic reversing valve is added to the electronically controlled multi-mode steering valve.
- the front wheel steering mode is automatically switched to the rear wheel steering mode, and the fourth electromagnetic reversing mode is utilized.
- the valve can switch the direction of entry of the pressure oil in the independent commutation mode to conform to the operating habits of the driver in reverse driving.
- Figure 1 shows a schematic diagram of four common steering modes.
- FIG. 2 is a schematic diagram of the steering principle of the existing manual control multi-mode steering valve.
- Figure 3 is a schematic diagram of the steering principle of the multi-mode steering system of the prior electro-hydraulic proportional control.
- Figure 4 is a schematic illustration of the steering principle of a parallel multi-mode steering scheme controlled by a prior art solenoid valve.
- Figure 5 is a schematic view showing the structure of the first embodiment of the electronically controlled multi-mode steering valve of the present invention.
- Fig. 6 is a schematic structural view of a steering hydraulic control system to which the embodiment of Fig. 5 is applied.
- Figure 7 is a schematic view showing the structure of a second embodiment of the electronically controlled multi-mode steering valve of the present invention.
- Fig. 8 is a schematic view showing the structure of a steering hydraulic control system to which the embodiment of Fig. 7 is applied.
- Figure 9 is a schematic view showing the structure of a third embodiment of the electronically controlled multi-mode steering valve of the present invention.
- Figure 10 is a schematic view showing the structure of a steering hydraulic control system to which the embodiment of Figure 9 is applied. detailed description
- the electrically controlled multi-mode steering valve includes: a split manifold Y, a first electromagnetic reversing valve Y1, and a second electromagnetic reversing valve ⁇ 2.
- the valve body of the electronically controlled multi-mode steering valve comprises four pairs of valve ports, the split collecting valve ⁇ has a collecting port, a first dividing port and a second dividing port, the first electromagnetic reversing valve Y1 and the second electromagnetic switching
- the valve port 2 has a first port, a second port, and a third port.
- the first ports of the first electromagnetic reversing valve Y1 and the second electromagnetic reversing valve ⁇ 2 respectively communicate with the first group of valve ports [P R , PiJ of the valve body, the first electromagnetic reversing valve Y1 and the second electromagnetic exchange
- the second port of the valve Y2 is respectively communicated with the second group of valve ports [Al, Bl] of the valve body
- the third port of the first electromagnetic reversing valve Y1 is in communication with the collecting port of the diverting collecting valve Y
- the first split port of the split collecting valve Y and the third port of the second electromagnetic reversing valve Y2 are respectively communicated with the third group of valve ports [A2, B2] of the valve body, and the second split of the split collecting valve Y
- the third port of the port and the second reversing valve Y2 are respectively in communication with the fourth group of valve ports [A3, B3] of the valve body.
- the first electromagnetic reversing valve and the second electromagnetic reversing valve are used to perform
- the selection of the working mode is switched, and the splitting and collecting functions of the splitting and collecting valve are used to realize the proportional distribution of the oil, thereby realizing the steering function of various modes.
- a two-position three-way electromagnetic directional control valve can be selected.
- the electronically controlled multi-mode steering valve of the embodiment is installed in the steering hydraulic control system, at least two types of operation modes can be switched, wherein the two working modes can be switched by switching the first electromagnetic reversing valve and the second electromagnetic The reversing valve is implemented.
- the first set of valve ports [P R , PxJ of the valve body communicate with the second set of valve ports [Al, Bl]. It can be seen from Fig. 5 that at this time, the first electromagnetic reversing valve Y1 and the second electromagnetic reversing valve Y2 are not energized, the valve port is? ! ⁇ Directly connected to A1, and the valve port PL is directly connected to B1. At this time, the pressurized oil can flow into the independent steering cylinder in the steering hydraulic control system directly through the electronically controlled multi-mode steering valve.
- the first set of valve ports [P R , PxJ of the valve body are in communication with the third set of valve ports [A2, B2] and the fourth set of valve ports [A3, B3]. It can be seen from Fig. 5 that at this time, both the first electromagnetic reversing valve Y1 and the second electromagnetic reversing valve Y2 need to be powered, so that the valve port is so? !
- the electronically controlled multi-mode steering valve can lead two oil paths, which are respectively connected to two sets of independent steering cylinders of the steering hydraulic control system, thereby coordinating the two independent groups.
- the steering cylinder is steered.
- the steering mode can be either a crab steering or a small turning steering mode. This is related to the third group of valve ports [A2, B2] and the fourth group of valve ports [A3, B3] and two groups respectively.
- the connection mode of the independent steering cylinder is related.
- a new electromagnetic reversing valve may be added for switching, and the electromagnetic reversing valve may be disposed outside the electronically controlled multi-mode steering valve of the embodiment.
- the function can also be further integrated with the electronically controlled multi-mode steering valve of the present embodiment.
- Figure 7 is a schematic view showing the structure of a second embodiment of the electronically controlled multi-mode steering valve of the present invention.
- the embodiment also integrates a third electromagnetic reversing valve Y3 in the electronically controlled multi-mode steering valve, and the third electromagnetic reversing valve ⁇ 3 has two pairs of oil ports, and the diverting collecting valve ⁇
- the third port of the second split port and the second electromagnetic reversing valve ⁇ 2 respectively communicate with the first group of ports of the third electromagnetic reversing valve ⁇ 3, and then pass through the second group of ports of the third electromagnetic reversing valve ⁇ 3
- the fourth set of valve ports [A3, ⁇ 3] of the valve body are connected.
- the electronically controlled multi-mode steering valve of the embodiment is installed in the steering hydraulic control system, at least three types of operation modes can be switched, in addition to the two working modes in the first embodiment described above, Further implement the third mode of operation.
- the switching of the third working mode and the second working mode is achieved by the third electromagnetic reversing valve.
- the first set of valve ports [P R , P L ] of the valve body are in communication with the third group of valve ports [A2, B2] and the fourth group of valve ports [A3, B3], And the oil flow direction of the first group of valve ports [P R , P L ] and the fourth group of valve ports [A3, B3] is different from the direction of oil flow in the second working mode.
- both the first electromagnetic reversing valve Y1 and the second electromagnetic reversing valve Y2 need to be energized, and the third electromagnetic reversing valve Y3 is not energized, such that the valve
- the port P R is connected to the valve ports A2 and A3 through the diverter manifold Y, respectively, and the third port of the second electromagnetic reversing valve Y2 is connected to the port ports B2 and B3 respectively, and when switching to the third working mode
- the third electromagnetic reversing valve Y3 is energized, at this time, the valve port P R is connected to the valve port A2 and B3 through the diverting collecting valve Y, respectively, and the third port of the second electromagnetic reversing valve Y2 is respectively connected with the valve Ports B2 and A3 are connected. In this way, the flow direction of the oil is changed by the third electromagnetic reversing
- the above two embodiments adopt the structure of a single-split collecting valve, and the same split-current collecting function can be realized compared with the existing double-split collecting valve structure. It is also possible to further reduce the loss of oil pressure by the split flow collecting valve and improve the portability of the steering.
- the front axle independent steering mode and the rear axle independent steering mode are switched, but there is also a problem that the steering direction controlled by the driver is opposite to the actual steering direction, and does not conform to the driver's operating habits.
- a new electromagnetic reversing valve can be added to switch the oil direction.
- the electromagnetic directional control valve may be disposed outside the electronically controlled multi-mode steering valve of the present embodiment, or may be further integrated with the electronically controlled multi-mode steering valve of the present embodiment.
- FIG. 9 is a schematic structural view of a third embodiment of the electronically controlled multi-mode steering valve of the present invention. Compared with the second embodiment, the embodiment is further provided in the electronically controlled multi-mode steering valve
- the fourth electromagnetic reversing valve Y4 is integrated, and the fourth electromagnetic reversing valve ⁇ 4 has two pairs of oil ports, the first group of valve body ports of the valve body [P R , and the first of the fourth electromagnetic reversing valve Y4 The group ports are communicated, and the second group of ports of the fourth electromagnetic reversing valve Y4 are respectively communicated with the first ports of the first electromagnetic reversing valve Y1 and the second electromagnetic reversing valve Y2.
- the fourth operational mode can be realized by switching the first electromagnetic reversing valve, the second electromagnetic reversing valve, and the fourth electromagnetic reversing valve.
- the first set of valve ports [P R , P L ] of the valve body communicate with the second set of valve ports [Al, Bl], and the first set of valve ports [P R , PiJ and
- the oil flow direction of the second group of valve ports [Al, Bl] is different from the direction of oil flow in the first mode of operation. It can be seen from FIG.
- valve port P R It is in communication with the valve port A1, and the valve port P L is in communication with the valve port B1, and in the fourth mode of operation, the first electromagnetic reversing valve and the second electromagnetic reversing valve are not energized, and the fourth electromagnetic exchange The valve is energized.
- the valve port PL communicates with the valve port A1
- the valve port P R communicates with the valve port B1. This changes the flow direction of the pressurized oil in the valve body, so that when the construction vehicle is driving in the reverse direction, it can still meet the driver's operating habits.
- the third electromagnetic reversing valve and the fourth electromagnetic reversing valve may each select a two-position four-way electromagnetic steering valve according to the required port and function.
- Fig. 6 is a schematic structural view of the steering hydraulic control system using the embodiment of Fig. 5.
- the steering hydraulic control system includes a full hydraulic steering gear 2, a safety valve group 4, a first independent steering cylinder 5, a second independent steering cylinder 6, and an electronically controlled multi-mode steering valve shown in Fig. 5.
- the full hydraulic steering gear 2 has two sets of oil ports, and the first group of oil ports of the full hydraulic steering gear 2 respectively establish a system circuit with the pressure circuit and the oil return circuit.
- the first set of valve ports and full hydraulic steering of the valve body of the electronically controlled multi-mode steering valve 3 The second group of ports of the device 2 communicates with each other, and the second group of valve ports of the valve body communicate with the first group of independent steering cylinders 5, and the third group of valve ports of the valve body and the fourth group of valve ports respectively pass through the safety valve group 4 communicates with the first set of independent steering cylinders 5 and the second set of independent steering cylinders 6.
- the safety valve group 4 is used to protect the oil cylinder to avoid excessive pressure, and the function of replenishing the oil cylinder can also be considered.
- the safety valve group 4 can adopt various existing structures. Implementation, and not the focus of the discussion of the present invention, this will not repeat its structure.
- the third electromagnetic reversing valve 9 can be added between the electronically controlled multi-mode steering valve 3 and the second group of independent steering cylinders 6, and in order to reverse driving in the construction vehicle
- the fourth electromagnetic reversing valve 10 can be added between the full hydraulic steering gear 2 and the electronically controlled multi-mode steering valve 3.
- Fig. 8 is a schematic structural view of the steering hydraulic control system using the embodiment of Fig. 7.
- the third electromagnetic reversing valve 9 is integrated in the electronically controlled multi-mode steering valve 3 as compared with the steering hydraulic control system shown in FIG.
- Fig. 10 is a schematic structural view of the steering hydraulic control system using the embodiment of Fig. 9.
- the third electromagnetic reversing valve 9 and the fourth electromagnetic reversing valve 10 are integrated in the electrically controlled multi-mode steering valve 3 as compared with the steering hydraulic control system shown in FIG.
- This electronically controlled multi-mode steering valve has a high degree of integration and is more practical for the user.
- valve members used in the above various electronically controlled multi-mode steering valve embodiments can adopt general-purpose conventional valve members, have mature technology, reliable operation, and relatively low price.
- each electromagnetic reversing valve of the electronically controlled multi-mode steering valve is electrically switched to lose power reset. Even if a circuit failure occurs during the working process, the spool will automatically reset under the action of the spring to restore the independent steering function of the front wheel. , to ensure the safety of driving.
- the above embodiments of the steering hydraulic control system are applicable to various types of engineering vehicles, and are particularly suitable for use in a wheeled crane.
- the vehicle body and the cab (both not shown) and the steering fluid may be included. Control system, the car body has two sets of wheels
- the steering wheel is equipped with a steering wheel 1 and multi-mode electronic control selector switch (not shown).
- the steering wheel 1 is connected to the hydraulic steering gear 2 in the steering hydraulic control system, and the two sets of wheels 7, 8 are respectively connected to the first independent steering cylinder 5 and the second independent steering cylinder 6 in the steering hydraulic control system, multi-mode electric
- the control selection switch is connected with the electromagnetic reversing valve in the electronically controlled multi-mode steering valve in the steering hydraulic control system, and the multi-mode electronically controlled selector switch selects the electromagnetic reversing valve in the electronically controlled multi-mode steering valve by selecting different working modes. Send the corresponding switching signal.
- the first group of oil ports of the full hydraulic steering gear 2 establishes a system circuit with the pressure circuit and the oil return circuit, and the flow direction of the pressure oil can be switched by operating the steering wheel 1 according to actual needs.
- the default working mode is the front axle independent steering mode. In this mode, all the electromagnetic reversing valves in the electronically controlled multi-mode steering valve are not energized. At this time, the pressure oil is from the full hydraulic steering gear 2 through the electronic control.
- the mode steering valve 3 flows into the first group of independent steering cylinders 5, and the front axle independent steering mode is realized in the forward direction shown in the drawing.
- the electromagnetic reversing valves Y1 and ⁇ 2 in the electronically controlled multi-mode steering valve 3 are energized, and the electromagnetic reversing valves Y1 and ⁇ 4 are de-energized.
- the pressure oil output from the full hydraulic steering gear 2 is passed through
- the electrically controlled multi-mode steering valve 3 flows into the first set of independent steering cylinders 5 and the second set of independent steering cylinders 6, thereby achieving a small turning steering function.
- the electromagnetic reversing valves Yl, ⁇ 2, and ⁇ 3 in the electronically controlled multi-mode steering valve 3 are energized, and the electromagnetic reversing valve ⁇ 4 is de-energized.
- the pressure oil discharged from the full hydraulic steering gear 2 is electrically discharged.
- the multi-mode steering valve 3 flows into the first set of independent steering cylinders 5 and the second set of independent steering cylinders 6, but the pressurized oil flows into the second set of independent steering
- the oil direction of the cylinder 6 is opposite to the direction of the oil in the small turning steering mode, thereby realizing the crab steering function.
- the front wheel of the original vehicle becomes the rear wheel, and the original rear wheel becomes the front wheel. If the direction of the steering gear output oil is not changed, turn the steering wheel to the right (left). The vehicle turns to the left (right), which is very inconsistent with the driver's operating habits. Therefore, when the vehicle is traveling in the reverse direction, the electromagnetic reversing valve Y4 will be energized, thereby changing the direction of the hydraulic output of the full hydraulic steering gear, so that the steering operation in the reverse driving still conforms to the driver's operating habits.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Servomotors (AREA)
- Power Steering Mechanism (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2015111565/06A RU2604466C1 (ru) | 2012-11-27 | 2013-11-15 | Клапан многорежимного рулевого управления с электрическим управлением, гидравлическая система рулевого управления и кран колесного типа |
EP13858490.9A EP2927094B1 (en) | 2012-11-27 | 2013-11-15 | Electric-control multimode steering valve, steering hydraulic control system, and wheel type crane |
CA2881103A CA2881103C (en) | 2012-11-27 | 2013-11-15 | Electric-control multimode steering valve, steering hydraulic control system, and wheel type crane |
AU2013351662A AU2013351662B2 (en) | 2012-11-27 | 2013-11-15 | Electric-control multimode steering valve, steering hydraulic control system, and wheel type crane |
BR112015006338A BR112015006338A2 (pt) | 2012-11-27 | 2013-11-15 | válvula de direção multimodo de controle elétrico, sistema de controle hidráulico de direção e guindaste do tipo com roda |
IN1007DEN2015 IN2015DN01007A (zh) | 2012-11-27 | 2013-11-15 | |
US14/706,598 US9533704B2 (en) | 2012-11-27 | 2015-05-07 | Electric-control multimode steering valve, steering hydraulic control system, and wheel type crane |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210492525.2 | 2012-11-27 | ||
CN201210492525.2A CN102923188B (zh) | 2012-11-27 | 2012-11-27 | 电控多模式转向阀、转向液控系统以及轮式起重机 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/706,598 Continuation US9533704B2 (en) | 2012-11-27 | 2015-05-07 | Electric-control multimode steering valve, steering hydraulic control system, and wheel type crane |
Publications (1)
Publication Number | Publication Date |
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WO2014082530A1 true WO2014082530A1 (zh) | 2014-06-05 |
Family
ID=47638161
Family Applications (1)
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PCT/CN2013/087187 WO2014082530A1 (zh) | 2012-11-27 | 2013-11-15 | 电控多模式转向阀、转向液控系统以及轮式起重机 |
Country Status (9)
Country | Link |
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US (1) | US9533704B2 (zh) |
EP (1) | EP2927094B1 (zh) |
CN (1) | CN102923188B (zh) |
AU (1) | AU2013351662B2 (zh) |
BR (1) | BR112015006338A2 (zh) |
CA (1) | CA2881103C (zh) |
IN (1) | IN2015DN01007A (zh) |
RU (1) | RU2604466C1 (zh) |
WO (1) | WO2014082530A1 (zh) |
Cited By (2)
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CN108317112A (zh) * | 2018-03-21 | 2018-07-24 | 安徽合力股份有限公司 | 一种叉车双联泵转向停车制动解除液压系统 |
CN109501855A (zh) * | 2018-11-29 | 2019-03-22 | 湖北航天技术研究院特种车辆技术中心 | 一种多模式转向系统 |
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CN102923188B (zh) * | 2012-11-27 | 2015-07-22 | 徐州重型机械有限公司 | 电控多模式转向阀、转向液控系统以及轮式起重机 |
CN104309683B (zh) * | 2014-09-22 | 2017-02-22 | 三一汽车起重机械有限公司 | 转向液压系统和轮式起重机 |
CN105857387B (zh) * | 2016-05-11 | 2019-01-22 | 姚连涛 | 一种可变角度传动装置、车辆底盘及其控制方法 |
CN106741166A (zh) * | 2016-12-16 | 2017-05-31 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | 除雪车四轮转向系统 |
US10086868B1 (en) * | 2017-05-12 | 2018-10-02 | Cnh Industrial America Llc | Four wheel steering with independent control valves |
CN108547821B (zh) * | 2018-07-04 | 2023-08-01 | 北京路凯智行科技有限公司 | 集成液压转向控制阀组及液压转向控制系统 |
US11472395B2 (en) * | 2020-02-28 | 2022-10-18 | Cnh Industrial America Llc | System and method for executing multi-mode turns with a work vehicle |
CN115465359A (zh) * | 2022-09-15 | 2022-12-13 | 泰安航天特种车有限公司 | 一种超重型电驱多轴车辆模块化电液转向系统及控制方法 |
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- 2013-11-15 IN IN1007DEN2015 patent/IN2015DN01007A/en unknown
- 2013-11-15 CA CA2881103A patent/CA2881103C/en not_active Expired - Fee Related
- 2013-11-15 RU RU2015111565/06A patent/RU2604466C1/ru not_active IP Right Cessation
- 2013-11-15 EP EP13858490.9A patent/EP2927094B1/en not_active Not-in-force
- 2013-11-15 AU AU2013351662A patent/AU2013351662B2/en not_active Ceased
- 2013-11-15 BR BR112015006338A patent/BR112015006338A2/pt not_active IP Right Cessation
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CN109501855A (zh) * | 2018-11-29 | 2019-03-22 | 湖北航天技术研究院特种车辆技术中心 | 一种多模式转向系统 |
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Also Published As
Publication number | Publication date |
---|---|
AU2013351662B2 (en) | 2017-04-13 |
BR112015006338A2 (pt) | 2017-07-04 |
CN102923188A (zh) | 2013-02-13 |
CA2881103A1 (en) | 2014-06-05 |
EP2927094B1 (en) | 2019-10-02 |
US9533704B2 (en) | 2017-01-03 |
EP2927094A4 (en) | 2016-08-17 |
AU2013351662A1 (en) | 2015-03-26 |
RU2604466C1 (ru) | 2016-12-10 |
EP2927094A1 (en) | 2015-10-07 |
CA2881103C (en) | 2017-05-16 |
CN102923188B (zh) | 2015-07-22 |
US20150307124A1 (en) | 2015-10-29 |
IN2015DN01007A (zh) | 2015-06-12 |
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