CN104149846B - A kind of hydraulic control system of the cross running steering hardware based on four station two-way cylinders - Google Patents
A kind of hydraulic control system of the cross running steering hardware based on four station two-way cylinders Download PDFInfo
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- CN104149846B CN104149846B CN201410268776.1A CN201410268776A CN104149846B CN 104149846 B CN104149846 B CN 104149846B CN 201410268776 A CN201410268776 A CN 201410268776A CN 104149846 B CN104149846 B CN 104149846B
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Abstract
The invention discloses a kind of hydraulic control system of the cross running steering hardware based on four station two-way cylinders, it is characterized in that: through a point two-way after hydraulic oil flows into from the first actuator port of this hydraulic control system, connect after the first one way sequence valve and communicate with the rod chamber of left back oil cylinder in one road, the rodless cavity of left back oil cylinder communicates with the rodless cavity oil circuit of right front oil cylinder, the rod chamber of right front oil cylinder is communicated with the second actuator port of this hydraulic control system, the rod chamber of the left front oil cylinder of another Lu Zeyu communicates, the rodless cavity of left front oil cylinder communicates with the rodless cavity oil circuit of right back oil cylinder, the rod chamber of right back oil cylinder is connected after the second one way sequence valve and is communicated with the second actuator port of this hydraulic control system.The present invention adopts hydraulic control system to achieve significantly left and right turn function in the driving vehicle cross running process of four-wheel four direction, compares automatically controlled mode, has better reliability, manufacture simultaneously and maintenance cost low, easy to maintenance.
Description
Technical field
The present invention relates to a kind of steering hydraulic control system, particularly a kind of hydraulic control system of the cross running steering hardware based on four station two-way cylinders.
Background technology
Traditional 4Wdvehicle only has longitudinal driving function, and four-wheel four direction driving vehicle as its name suggests, while it has longitudinal driving function, also need the function with cross running, because the steering hardware of four-wheel four direction driving vehicle and mode thereof have vertical and horizontal driving functions, therefore the steering swivel system of four-wheel four direction driving vehicle is very different relative to the steering hardware tool of the 4Wdvehicle of routine.
Due to, technical requirements and the technology content of the steering swivel system of four-wheel four direction driving vehicle are all higher.At present, domestic and international fertile producer is all very little.For the steering swivel system of existing four-wheel four direction driving vehicle, manufacturer generally adopts the mode of computer programming to control four motor steerings, because the cornering resistance of four wheels differs greatly, when running into road surface and being bad, the overload of the indivedual motor of easy generation or the phenomenon of stall, simultaneously, because the fault occurrence rate of motor and control panel is very large, make the poor reliability of steering swivel system, and easily damage, make four steer motor and control panel costly, also result in vehicle purchase car cost and service expenditure improves greatly.
Summary of the invention
The technical problem to be solved in the present invention is the present situation for prior art, provides a kind of good reliability, cost low, easy to maintenance and the hydraulic control system of the large cross running steering hardware based on four station two-way cylinders of rotation amplitude.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of hydraulic control system of the cross running steering hardware based on four station two-way cylinders, it is characterized in that: comprise a left side four station two-way cylinder be arranged between vehicle front left wheel and rear left wheel, be arranged on the right side four station two-way cylinder between vehicle right front wheel and right rear wheel, first one way sequence valve, second one way sequence valve, bidirectional hydraulic lock, these left four station two-way cylinders comprise left front oil cylinder and left back oil cylinder, these right four station two-way cylinders comprise right front oil cylinder and right back oil cylinder, through a point two-way after hydraulic oil flows into from the first actuator port of this hydraulic control system, connect after the first one way sequence valve and communicate with the rod chamber of left back oil cylinder in one road, the rodless cavity of left back oil cylinder communicates with the rodless cavity oil circuit of right front oil cylinder, the rod chamber of right front oil cylinder is communicated with the second actuator port of this hydraulic control system, the rod chamber of the left front oil cylinder of another Lu Zeyu communicates, the rodless cavity of left front oil cylinder communicates with the rodless cavity oil circuit of right back oil cylinder, the rod chamber of right back oil cylinder is connected after the second one way sequence valve and is communicated with the second actuator port of this hydraulic control system, in addition, also comprise the blocking device for fixing front left wheel and right front wheel.
As improvement, between the rod chamber and the rod chamber of right front oil cylinder of left back oil cylinder, be provided with bidirectional hydraulic lock, between the rod chamber and the rod chamber of left front oil cylinder of right back oil cylinder, be provided with bidirectional hydraulic lock.
Improve again, the piston of described left front oil cylinder and right front oil cylinder is provided with Fill valve and spill valve, left back oil cylinder and right back in-oil cylinder piston are provided with Fill valve, by certainly arranging repairing and draining mechanism with it at oil cylinder, on the one hand, eliminate unnecessary pipeline, save some appliance switch elements; On the other hand, overcoming the kinematic error because letting out generation in oil cylinder, improve precision and the reliability of series winding cylinder movement.
Improve again, described first one way sequence valve and the second one way sequence valve comprise a check valve and the two position three way directional control valve in parallel with this check valve respectively, the T mouth connected tank of this two position three way directional control valve, and control commutation by the pressure of P mouth, check valve wherein in parallel is convenient to hydraulic oil and is back to fuel tank, simultaneously, utilize the pressure of P mouth to control the commutation of two position three way directional control valve, achieve the function of sequence valve, when P mouth pressure does not reach the force value of setting, the left position of two position three way directional control valve is enable, hydraulic oil can not pass through from this two position three way directional control valve, when P mouth pressure rises to the force value of setting, two position three way directional control valve realizes commutation, make right position enable, thus hydraulic oil is by this two position three way directional control valve, so just achieve the function of sequence valve.
Improve again, described blocking device comprises the left steering oil cylinder controlling front left wheel and rotate, control the right steering oil cylinder that right front wheel is rotated, first two-position four-way solenoid valve, oil pump and hydraulic steering gear, the oil outlet of oil pump is connected with the P mouth of hydraulic steering gear, the A mouth of hydraulic steering gear is connected with T mouth with the P mouth of the first two-position four-way solenoid valve respectively with B mouth, the A mouth of the first two-position four-way solenoid valve is connected with the rodless cavity of left steering oil cylinder, the rod chamber of left steering oil cylinder is connected with the rodless cavity of right steering oil cylinder, the rod chamber of right steering oil cylinder is connected with the B mouth of the first two-position four-way solenoid valve, simultaneously, bidirectional hydraulic lock is provided with between the rodless cavity and the rod chamber of right steering oil cylinder of left steering oil cylinder.When 2DT obtains electric, the first right position of two-position four-way solenoid valve is enable, the rodless cavity promotion piston rod that pressure oil enters left steering oil cylinder ejects, because the rodless cavity of the rod chamber of left steering oil cylinder and right steering oil cylinder is together in series, the pressure oil of left steering cylinder rod chamber enters the rodless cavity of right steering oil cylinder, the piston rod of right steering oil cylinder is released, left, the piston rod of right steering oil cylinder promotes front left wheel simultaneously and right front wheel is rotated, front left wheel and right front wheel drive rear left wheel and right rear wheel to rotate respectively, left, right steering oil cylinder front left wheel and right front wheel is push-jump put in place after, front left wheel and right front wheel are at horizontal alignment, left, right steering oil cylinder is locked by bidirectional hydraulic lock, now front left wheel and right front wheel are in stationary state.
Improve, also comprise hydraulic steering gear and oil pump, the oil outlet of oil pump is connected with the P mouth of hydraulic steering gear, and A mouth and the B mouth of hydraulic steering gear are connected the first actuator port and the second actuator port respectively, improves the compactedness of hydraulic system structure.
Improve again, also comprise the second two-position four-way solenoid valve, the P mouth of this second two-position four-way electromagnetism is connected with B mouth with the A mouth of hydraulic steering gear respectively with T mouth, A mouth and the B mouth of this second two-position four-way electromagnetism are connected the first actuator port and the second actuator port respectively, and what utilize the second two-position four-way solenoid valve to control transverse direction to turn to is enable.
Improve, also comprise a by pass valve, this by pass valve is arranged in the bypass of the oil outlet of oil pump, realizes overvoltage protection.
Compared with prior art, owing to the invention has the advantages that: according to the requirement of four-wheel four direction driving vehicle, when cross running, the axis of front left wheel and right front wheel is needed to align in the longitudinal direction, and keep maintaining static in cross running process, left, right four station two-way cylinders use as fork, when rear left wheel and right rear wheel are in left-right rotation, the axis of rear left wheel and right rear wheel meet at front left wheel and right front wheel line of centers line on, therefore, when laterally turning to, first, need to utilize blocking device front left wheel and right front wheel to be fixed, when vehicle right-hand corner, pressure oil flows into from the first actuator port, now, due to the partition of the first one way sequence valve, hydraulic oil can only flow into the rod chamber of the left front oil cylinder of left four station two-way cylinders, the piston rod of left front oil cylinder is retracted, promotion rear left wheel rotates counterclockwise, simultaneously, the hydraulic oil of the rod chamber of left front oil cylinder enters the rodless cavity of right back oil cylinder, the piston rod of right back oil cylinder stretches out, promotion right rear wheel rotates counterclockwise, because the piston rod of left front oil cylinder and right back oil cylinder is synchronization action, therefore, the retraction amount of the piston rod of left front oil cylinder is equal with the overhang of the piston rod of right back oil cylinder, the corner of rear left wheel is less than the corner of right rear wheel, by setting the length of two four station two-way cylinders, the axes intersect achieving rear left wheel and right rear wheel in front left wheel and right front wheel line of centers line on, along with the sustainable supply of pressure oil, when the piston rod of left front oil cylinder and the casing wall of left front oil cylinder offset, the pressure of the first actuator port raises, first one way sequence valve is opened, pressure oil enters the rod chamber of left back oil cylinder, the piston rod promoting left back oil cylinder is retracted, rear left wheel is made to continue to rotate counterclockwise, simultaneously, because the rodless cavity of left back oil cylinder is connected with the rodless cavity oil circuit of right front oil cylinder, in the process that the piston rod of left back oil cylinder is retracted, the rodless cavity pressure oil of left back oil cylinder enters in the rodless cavity of right front oil cylinder, thus the piston rod promoting right front oil cylinder stretches out, make to promote right rear wheel to continue to rotate counterclockwise simultaneously, similarly, the shortening amount of the piston rod of left back oil cylinder is equal with the elongation of the piston rod of right front oil cylinder, still meet the action request of vehicle turns right, in like manner, when vehicle is turned left, pressure oil flows into from the second actuator port, flow back to from the first actuator port, its principle is identical with right-hand corner, and the present invention adopts hydraulic control system to achieve significantly left and right turn function in the driving vehicle cross running process of four-wheel four direction, compare automatically controlled mode, there is better reliability, simultaneously manufacture and maintenance cost low, easy to maintenance.
Accompanying drawing explanation
The hydraulic principle figure of left and right turn when Fig. 1 is the cross running based on the cross running steering hardware of four station two-way cylinders in the embodiment of the present invention;
Fig. 2 comprises hydraulic steering gear and utilizes left and right steering cylinder to carry out the hydraulic principle figure of front-wheel locking in the embodiment of the present invention;
Fig. 3 is the hydraulic principle figure comprising hydraulic steering gear in the embodiment of the present invention;
Fig. 4 is the structural representation based on the cross running steering hardware of four station two-way cylinders in the embodiment of the present invention;
Fig. 5 is the initial condition schematic diagram that in the embodiment of the present invention, four-wheel four direction driving vehicle switches to longitudinally latter two four stations two-way cylinder and four wheels from transverse direction;
Fig. 6 is the initial condition schematic diagram that in the embodiment of the present invention, four-wheel four direction driving vehicle switches to laterally latter two four stations two-way cylinder and four wheels from longitudinal direction;
Fig. 7 is driving vehicle schematic diagram of two four station two-way cylinders and four wheels during right-hand corner in cross running state in four-wheel four direction in the embodiment of the present invention;
Fig. 8 is driving vehicle schematic diagram of two four station two-way cylinders and four wheels during turnon left in cross running state in four-wheel four direction in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
First, brief description is done to the lateral steering of the four-wheel four direction driving vehicle be applied to based on the hydraulic control system of the cross running steering hardware of four station two-way cylinders in the present embodiment, the lateral steering of this four-wheel four direction driving vehicle comprises frame 1, before this frame 1, after, left, right four direction intersection is respectively arranged with front left wheel 22, right front wheel 21, rear left wheel 23 and right rear wheel 24, in this front left wheel 22, right front wheel 21, rear left wheel 23 and right rear wheel 24 are hinged with left front spindle arm 32 successively, right front spindle arm 31, left back spindle arm 33 and right back spindle arm 34, left four station two-way cylinders 42 are provided with between left front spindle arm 32 and left back spindle arm 33, right four station two-way cylinders 41 are provided with between right front spindle arm 31 and right back spindle arm 34, left steering oil cylinder 52 and right steering oil cylinder 51 is disposed with on the side of front left wheel 22 and right front wheel 21, left steering oil cylinder 52 is connected with immediate spindle arm with right steering oil cylinder 51 one end, the other end is connected with frame 1.When lateral direction of car travels, front vehicle wheel 22,21 is fixed, and rear wheel 23,24 rotates, and rear wheel 23,24 is when left-right rotation, the axis of two rear wheels 23,24 meet at front vehicle wheel 22,21 line of centers line on, as shown in Figure 4.
As shown in Fig. 1 to 8, the hydraulic control system of the cross running steering hardware based on four station two-way cylinders in this enforcement, comprise a left side four station two-way cylinder 42 be arranged between vehicle front left wheel 22 and rear left wheel 23, be arranged on the right side four station two-way cylinder 41 between vehicle right front wheel 21 and right rear wheel 24, first one way sequence valve 13, second one way sequence valve 14, bidirectional hydraulic lock 12, these left four station two-way cylinders 42 comprise left front oil cylinder 421 and left back oil cylinder 422, these right four station two-way cylinders 41 comprise right front oil cylinder 411 and right back oil cylinder 412, through a point two-way after hydraulic oil flows into from the first actuator port of this hydraulic control system, connecting in one road, the first one way sequence valve 13 is rear to communicate with the rod chamber of left back oil cylinder 422, the rodless cavity of left back oil cylinder 422 communicates with the rodless cavity oil circuit of right front oil cylinder 411, the rod chamber of right front oil cylinder 411 is communicated with the second actuator port of this hydraulic control system, another road communicates with the rod chamber of left front oil cylinder 421, the rodless cavity of left front oil cylinder 421 communicates with the rodless cavity oil circuit of right back oil cylinder 412, the rod chamber of right back oil cylinder 412 is connected after the second one way sequence valve 14 and is communicated with the second actuator port of this hydraulic control system, simultaneously, bidirectional hydraulic lock 12 is provided with between the rod chamber and the rod chamber of right front oil cylinder 411 of left back oil cylinder 422, through a point two-way after hydraulic oil flows into from the second actuator port of this hydraulic control system, one tunnel enters the rod chamber of right back oil cylinder 412 after the second one way sequence valve 14, the rodless cavity of right back oil cylinder 412 communicates with the rodless cavity oil circuit of left front oil cylinder 421, the rod chamber of left front oil cylinder 421 is communicated with the first actuator port of this hydraulic control system, another road then enters the rod chamber of right front oil cylinder 411, the rodless cavity of right front oil cylinder 411 communicates with the rodless cavity oil circuit of left back oil cylinder 422, hydraulic oil communicates with the first actuator port of this hydraulic control system after the second one way sequence valve 14 from the rod chamber of left back oil cylinder 422, simultaneously, bidirectional hydraulic lock 12 is provided with between the rod chamber and the rod chamber of left front oil cylinder 421 of right back oil cylinder 412, in addition, the blocking device for fixing front left wheel 22 and right front wheel 21 is also comprised.
Wherein, blocking device comprises the left steering oil cylinder 52 controlling front left wheel 22 and rotate, control the right steering oil cylinder 51 that right front wheel 21 is rotated, first two-position four-way solenoid valve 61, oil pump 10 and hydraulic steering gear 9, the oil outlet of oil pump 10 is connected with the P mouth of hydraulic steering gear 9, the A mouth of hydraulic steering gear 9 is connected with T mouth with the P mouth of the first two-position four-way solenoid valve 61 respectively with B mouth, the A mouth of the first two-position four-way solenoid valve 61 is connected with the rodless cavity of left steering oil cylinder 52, the rod chamber of left steering oil cylinder 52 is connected with the rodless cavity of right steering oil cylinder 51, the rod chamber of right steering oil cylinder 51 is connected with the B mouth of the first two-position four-way solenoid valve 61, simultaneously, bidirectional hydraulic lock 12 is provided with between the rodless cavity and the rod chamber of right steering oil cylinder 51 of left steering oil cylinder 52.When 2DT obtains electric, the first right position of two-position four-way solenoid valve 61 is enable, the rodless cavity promotion piston rod that pressure oil enters left steering oil cylinder 52 ejects, because the rodless cavity of the rod chamber of left steering oil cylinder 52 and right steering oil cylinder 51 is together in series, the pressure oil of left steering oil cylinder 52 rod chamber enters the rodless cavity of right steering oil cylinder 51, the piston rod of right steering oil cylinder 51 is released, left, right steering oil cylinder 52, the piston rod of 51 promotes front left wheel 22 simultaneously and right front wheel 21 is rotated, front left wheel 22 and right front wheel 21 drive rear left wheel 23 and right rear wheel 24 to rotate respectively, left, right steering oil cylinder 52, 51 front left wheel 22 and right front wheel 21 is push-jump put in place after, front left wheel 22 and right front wheel 21 are at horizontal alignment, left, right steering oil cylinder 52, 51 are locked by bidirectional hydraulic lock, now front left wheel 22 and right front wheel 21 are in stationary state.
In addition, the piston of left front oil cylinder 421 and right front oil cylinder 411 is provided with Fill valve 11 and spill valve 15, piston in left back oil cylinder 422 and right back oil cylinder 412 is provided with Fill valve 11, by certainly arranging repairing and draining mechanism with it at oil cylinder, on the one hand, eliminate unnecessary pipeline, save some appliance switch elements; On the other hand, overcoming the kinematic error because letting out generation in oil cylinder, improve precision and the reliability of series winding cylinder movement.
In addition, the first one way sequence valve 13 and the second one way sequence valve 14 comprise a check valve and the two position three way directional control valve in parallel with this check valve respectively, the T mouth connected tank of this two position three way directional control valve, and control commutation by the pressure of P mouth.Be specially the first one way sequence valve 13 and comprise the first check valve 131 and first two position three way directional control valve 132 in parallel with the first check valve 131, the T mouth connected tank of this first two position three way directional control valve 132, and control commutation by the pressure of the P mouth of the first two position three way directional control valve 132, wherein, first check valve 131 in parallel is convenient to hydraulic oil and is back to fuel tank, in addition, the pressure of the P mouth of the first two position three way directional control valve 132 is utilized to control the commutation of the first two position three way directional control valve 132, realize the function of sequence valve, when the P mouth pressure of the first two position three way directional control valve 132 does not reach the force value of setting, the first left position of two position three way directional control valve 132 is enable, hydraulic oil can not pass through from this first two position three way directional control valve 132, when the P mouth pressure of the first two position three way directional control valve 132 rises to the force value of setting, first two position three way directional control valve 132 realizes commutation, make right position enable, thus hydraulic oil is by this first two position three way directional control valve 132, so just achieve the function of sequence valve, in like manner, the second one way sequence valve 14 comprises the second check valve 141 and second two position three way directional control valve 142 in parallel with this second check valve 141, and this second one way sequence valve 14 has identical oil channel structures with the first one way sequence valve 13, is not repeated at this.
Finally, in order to improve the compactedness of hydraulic system structure, hydraulic steering gear 9 and oil pump 10 can also be directly utilized to be the first actuator port and the second actuator port fuel feeding of hydraulic control system, the P mouth of the oil outlet and hydraulic steering gear 9 that are specially oil pump 10 is connected, and A mouth and the B mouth of hydraulic steering gear 9 are connected the first actuator port and the second actuator port respectively; In order to realize the enable control of the left and right turn to lateral steering, this hydraulic control system also comprises the second two-position four-way solenoid valve 62, the P mouth of this second two-position four-way electromagnetism 62 is connected with B mouth with the A mouth of hydraulic steering gear 9 respectively with T mouth, and A mouth and the B mouth of this second two-position four-way electromagnetism 62 are connected the first actuator port and the second actuator port respectively; In order to realize overvoltage protection, this hydraulic control system also comprises a by pass valve 10, and this by pass valve 10 is arranged in the bypass of the oil outlet of oil pump 8.
Below in conjunction with Fig. 5 to 8, brief description is done to four operating modes of left and right four station two-way cylinders 42,41:
The first operating mode, left front oil cylinder 421 and right front oil cylinder 411 piston are retracted completely, the piston rod of left back oil cylinder 422 and right back oil cylinder 412 is also retracted completely, left and right four station two-way cylinders 42,41 use as connecting rod, this operating mode is that four-wheel four direction driving vehicle is when longitudinal driving, the mode of operation of left and right four station two-way cylinders 42,41, as shown in Figure 5.
The second operating mode, left front oil cylinder 421 and right front oil cylinder 411 piston are retracted completely, the piston rod of left back oil cylinder 422 and right back oil cylinder 412 all stretches out, front left wheel 22 and right front wheel 21 under the effect of blocking device, horizontal alignment, and locked motionless, simultaneously, rear left wheel 23 and right rear wheel 24 are at horizontal alignment, and this operating mode is the initial condition of four-wheel four direction driving vehicle cross running, as shown in Figure 6.
The third operating mode, the piston rod of left front oil cylinder 421 and left back oil cylinder 422 is all retracted, the piston rod of right front oil cylinder 411 and right back oil cylinder 412 all stretches out, rear left wheel 23 and right rear wheel 24 turning clockwise, this operating mode is that four-wheel four direction driving vehicle is when cross running state bottom right is turned, the mode of operation of left and right four station two-way cylinders 42,41, as shown in Figure 7.
4th kind of operating mode, the piston rod of left front oil cylinder 421 and left back oil cylinder 422 all stretches out, the piston rod of right front oil cylinder 411 and right back oil cylinder 412 is all retracted, rear left wheel 23 and right rear wheel 24 turn left, this operating mode is that four-wheel four direction driving vehicle is when cross running state bottom left is turned, the mode of operation of left and right four station two-way cylinders 42,41, as shown in Figure 7.
According to the requirement of four-wheel four direction driving vehicle, when cross running, the axis of front left wheel 22 and right front wheel 21 is needed to align in the longitudinal direction, and keep maintaining static in cross running process, left and right four station two-way cylinders 42,41 use as fork, when rear left wheel 23 and right rear wheel 24 are in left-right rotation, the axis of rear left wheel 23 and right rear wheel 24 meet at front left wheel 22 and right front wheel 21 line of centers line on.
Following according to the present embodiment, composition graphs 2, does brief description to the principle of work of this hydraulic control system:
When entering cross running state, first, need to utilize blocking device front left wheel 22 and right front wheel 21 to be fixed.Being specially 2DT obtains electric, the right position of the first two-position four-way solenoid valve 61 is enable, pressure oil enters the rodless cavity of left steering oil cylinder 52, promotion piston rod ejects, because the rodless cavity of the rod chamber of left steering oil cylinder 52 and right steering oil cylinder 51 is together in series, the pressure oil of left steering oil cylinder 52 rod chamber enters the rodless cavity of right steering oil cylinder 51, the piston rod of right steering oil cylinder 51 is released, left, right steering oil cylinder 52, the piston rod of 51 promotes front left wheel 22 simultaneously and right front wheel 21 is rotated, now left, right four station two-way cylinders 42, 41 use as connecting rod, front left wheel 22 and right front wheel 21 drive rear left wheel 23 and right rear wheel 24 to rotate respectively, left, right steering oil cylinder 52, 51 front left wheel 22 and right front wheel 21 is push-jump put in place after, front left wheel 22 and right front wheel 21 are at horizontal alignment, left, right steering oil cylinder 52, 51 are locked by bidirectional hydraulic lock, now front left wheel 22 and right front wheel 21 are in stationary state.
Then, 1DT obtains electric, the right side of the first two-position four-way solenoid valve 61 is enable, the steering hardware that lateral direction of car travels is enable, when vehicle right-hand corner, pressure oil flows out from the A mouth of hydraulic steering gear 9, flow into from the first actuator port, now, due to the partition of the first one way sequence valve 13, hydraulic oil can only flow into the rod chamber of the left front oil cylinder 421 of left four station two-way cylinders 42, the piston rod of left front oil cylinder 421 is retracted, promote rear left wheel 23 to rotate counterclockwise, simultaneously, the hydraulic oil of the rod chamber of left front oil cylinder 421 enters the rodless cavity of right back oil cylinder 412, the piston rod of right back oil cylinder 412 stretches out, promote right rear wheel 24 to rotate counterclockwise, because the piston rod of left front oil cylinder 421 and right back oil cylinder 412 is synchronization actions, therefore, the retraction amount of the piston rod of left front oil cylinder 421 is equal with the overhang of the piston rod of right back oil cylinder 412, the corner of rear left wheel 23 is less than the corner of right rear wheel 24, by setting the length of two four station two-way cylinders, the axes intersect achieving rear left wheel 23 and right rear wheel 24 in front left wheel 22 and right front wheel 21 line of centers line on, along with the sustainable supply of pressure oil, when the piston rod of left front oil cylinder 421 and the casing wall of left front oil cylinder 421 offset, simultaneously, under the effect of the bidirectional hydraulic lock between the rod chamber that left front oil cylinder 421 is set and the rod chamber of right back oil cylinder 412, left front oil cylinder 421 is locked with right back oil cylinder 412, along with, the pressure of the first actuator port continues to raise, first one way sequence valve 13 is opened, pressure oil enters the rod chamber of left back oil cylinder 422, the piston rod promoting left back oil cylinder 422 is retracted, rear left wheel 23 is made to continue to rotate counterclockwise, simultaneously, because the rodless cavity of left back oil cylinder 422 is connected with the rodless cavity oil circuit of right front oil cylinder 411, in the process that the piston rod of left back oil cylinder 422 is retracted, the rodless cavity pressure oil of left back oil cylinder 422 enters in the rodless cavity of right front oil cylinder 411, thus the piston rod promoting right front oil cylinder 411 stretches out, then promote right rear wheel 24 to continue to rotate counterclockwise simultaneously, similarly, the shortening amount of the piston rod of left back oil cylinder 422 is equal with the elongation of the piston rod of right front oil cylinder 411, still meet the action request of vehicle turns right, in like manner, when vehicle is turned left, pressure oil flows into from the second actuator port, flows back to from the first actuator port, and its principle is identical with right-hand corner.
To sum up, the present invention adopts hydraulic control system to achieve significantly left and right turn function in the driving vehicle cross running process of four-wheel four direction, compares automatically controlled mode, has better reliability, manufacture simultaneously and maintenance cost low, easy to maintenance.
Claims (9)
1. the hydraulic control system based on the cross running steering hardware of four station two-way cylinders, it is characterized in that: comprise and be arranged on a left side four station two-way cylinder between vehicle front left wheel and rear left wheel, be arranged on the right side four station two-way cylinder, the first one way sequence valve, the second one way sequence valve, bidirectional hydraulic lock between vehicle right front wheel and right rear wheel, these left four station two-way cylinders comprise left front oil cylinder and left back oil cylinder, and these right four station two-way cylinders comprise right front oil cylinder and right back oil cylinder, through a point two-way after hydraulic oil flows into from the first actuator port of this hydraulic control system, connect after the first one way sequence valve and communicate with the rod chamber of left back oil cylinder in one road, the rodless cavity of left back oil cylinder communicates with the rodless cavity oil circuit of right front oil cylinder, the rod chamber of right front oil cylinder is communicated with the second actuator port of this hydraulic control system, the rod chamber of the left front oil cylinder of another Lu Zeyu communicates, the rodless cavity of left front oil cylinder communicates with the rodless cavity oil circuit of right back oil cylinder, the rod chamber of right back oil cylinder is connected after the second one way sequence valve and is communicated with the second actuator port of this hydraulic control system, in addition, also comprise the blocking device for fixing front left wheel and right front wheel.
2. hydraulic control system according to claim 1, it is characterized in that: between the rod chamber and the rod chamber of right front oil cylinder of described left back oil cylinder, be provided with bidirectional hydraulic lock, between the rod chamber and the rod chamber of left front oil cylinder of right back oil cylinder, be provided with bidirectional hydraulic lock.
3. hydraulic control system according to claim 1, is characterized in that: the piston of described left front oil cylinder and right front oil cylinder is provided with Fill valve and spill valve, and left back oil cylinder and right back in-oil cylinder piston are provided with Fill valve.
4. hydraulic control system according to claim 1, it is characterized in that: described first one way sequence valve and the second one way sequence valve comprise a check valve and the two position three way directional control valve in parallel with this check valve respectively, the T mouth connected tank of this two position three way directional control valve, and control commutation by the pressure of P mouth.
5. the hydraulic control system according to Claims 1-4 any one, it is characterized in that: described blocking device comprises the left steering oil cylinder controlling front left wheel and rotate, control the right steering oil cylinder that right front wheel is rotated, first two-position four-way solenoid valve, oil pump and hydraulic steering gear, the oil outlet of oil pump is connected with the P mouth of hydraulic steering gear, the A mouth of hydraulic steering gear is connected with T mouth with the P mouth of the first two-position four-way solenoid valve respectively with B mouth, the A mouth of the first two-position four-way solenoid valve is connected with the rodless cavity of left steering oil cylinder, the rod chamber of left steering oil cylinder is connected with the rodless cavity of right steering oil cylinder, the rod chamber of right steering oil cylinder is connected with the B mouth of the first two-position four-way solenoid valve, simultaneously, bidirectional hydraulic lock is provided with between the rodless cavity and the rod chamber of right steering oil cylinder of left steering oil cylinder.
6. the hydraulic control system according to Claims 1-4 any one, it is characterized in that: also comprise hydraulic steering gear and oil pump, the oil outlet of oil pump is connected with the P mouth of hydraulic steering gear, and A mouth and the B mouth of hydraulic steering gear are connected described first actuator port and the second actuator port respectively.
7. hydraulic control system according to claim 5, it is characterized in that: also comprise the second two-position four-way solenoid valve, the P mouth of this second two-position four-way solenoid valve is connected with B mouth with the A mouth of hydraulic steering gear respectively with T mouth, and A mouth and the B mouth of this second two-position four-way solenoid valve are connected the first actuator port and the second actuator port respectively.
8. hydraulic control system according to claim 6, is characterized in that: also comprise a by pass valve, and this by pass valve is arranged in the bypass of the oil outlet of described oil pump.
9. hydraulic control system according to claim 7, is characterized in that: also comprise a by pass valve, and this by pass valve is arranged in the bypass of the oil outlet of described oil pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410268776.1A CN104149846B (en) | 2014-06-17 | 2014-06-17 | A kind of hydraulic control system of the cross running steering hardware based on four station two-way cylinders |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410268776.1A CN104149846B (en) | 2014-06-17 | 2014-06-17 | A kind of hydraulic control system of the cross running steering hardware based on four station two-way cylinders |
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| CN104149846A CN104149846A (en) | 2014-11-19 |
| CN104149846B true CN104149846B (en) | 2016-03-23 |
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| CN201410268776.1A Active CN104149846B (en) | 2014-06-17 | 2014-06-17 | A kind of hydraulic control system of the cross running steering hardware based on four station two-way cylinders |
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| CN106015171A (en) * | 2016-07-18 | 2016-10-12 | 深圳霸特尔防爆科技有限公司 | Multi-station hydraulic cylinder interlocking and hydraulic cylinder oil supplementing and oil draining mechanism |
| CN106494501A (en) * | 2016-11-22 | 2017-03-15 | 广州市中收机械有限公司 | A kind of hydraulic steering mechanism for small harvester |
| CN107585712B (en) * | 2017-08-28 | 2019-05-14 | 合肥搬易通科技发展有限公司 | A kind of multidirectional fork truck skidding cornerite steering synchronization system |
| CN107879290A (en) * | 2017-12-20 | 2018-04-06 | 合肥搬易通科技发展有限公司 | The enlarger that a kind of multidirectional forklift front wheel turns to |
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