CN104058003A - Hydraulic system used for longitudinal and transverse running switching of four-wheel four-direction running vehicle - Google Patents
Hydraulic system used for longitudinal and transverse running switching of four-wheel four-direction running vehicle Download PDFInfo
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- CN104058003A CN104058003A CN201410269478.4A CN201410269478A CN104058003A CN 104058003 A CN104058003 A CN 104058003A CN 201410269478 A CN201410269478 A CN 201410269478A CN 104058003 A CN104058003 A CN 104058003A
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Abstract
The invention discloses a hydraulic system used for longitudinal and transverse running switching of a four-wheel four-direction running vehicle. An opening A of a first three-position four-way electromagnetic valve is connected with a rodless cavity of a left steering oil cylinder, a rod cavity of the left steering oil cylinder is connected with a rodless cavity of a right steering oil cylinder, a rod cavity of the right steering oil cylinder is connected with an opening B of the first three-position four-way electromagnetic valve, a two-way hydraulic lock is arranged between the rodless cavity of the left steering oil cylinder and the rod cavity of the right steering oil cylinder, an opening A of a second three-position four-way electromagnetic valve is divided into two paths which are respectively connected with rodless cavities of a left back oil cylinder and a right back oil cylinder, an opening B of the second three-position four-way electromagnetic valve is divided into two paths which are respectively connected with rodless cavities of the left back oil cylinder and the right back oil cylinder, and meanwhile, two-way hydraulic locks are respectively arranged between the rodless cavities and the rod cavities of the left back oil cylinder and the right back oil cylinder. The invention provides the hydraulic system used for the longitudinal and transverse running switching of the four-wheel four-direction running vehicle, and the hydraulic system has the advantages that the reliability is good, the cost is low, and the maintenance is convenient.
Description
Technical field
The present invention relates to one and turn to switching hydraulic control system, particularly a kind of for four-wheel four directions to driving vehicle portraitlandscape travel switch hydraulic efficiency pressure system.
Background technology
Four-wheel four directions is different from conventional 4Wdvehicle to driving vehicle, four-wheel four directions has longitudinal driving and cross running function to driving vehicle, therefore, four-wheel four directions to the steering hardware of driving vehicle meeting longitudinal driving and walk crosswise and travel outside the function of turning, also need to have to realize by longitudinal driving state and switch and the function to the switching of longitudinal driving state by cross running state to cross running state, therefore ensure four-wheel four directions to driving vehicle the stability at longitudinal driving and cross running state, turn to switched system must there is certain reliability.
With respect to the steering hardware of conventional 4Wdvehicle, four-wheel four directions is all higher to technical requirements and the technology content of the steering swivel system of driving vehicle, and at present, domestic and international fertile producer is very little.Steering swivel system for from existing four-wheel four directions to driving vehicle, manufacturer generally adopts four motor steerings of mode control of computer programming, because the fault occurrence rate of motor and control panel is very large, make the poor reliability of steering swivel system, and easily damage, meanwhile, use four steer motor and quadruplet to turn to the expense of control panel higher, also caused 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, provide a kind of good reliability, cost low, easy to maintenance for four-wheel four directions to the driving vehicle portraitlandscape hydraulic efficiency pressure system of switching of travelling.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of for four-wheel four directions to driving vehicle portraitlandscape travel switch hydraulic efficiency pressure system, comprise the right steering oil cylinder of controlling the left steering oil cylinder of vehicle front left wheel rotation and rotating with control vehicle right front wheel, it is characterized in that: also comprise a left side four station two-way cylinders that are arranged between vehicle front left wheel and left back wheel, be arranged on the right side four station two-way cylinders between vehicle right front wheel and right rear wheel, oil pump, hydraulic steering gear, the first two-position four-way solenoid valve, the second two-position four-way solenoid valve, the first three position four-way electromagnetic valve and the second three position four-way electromagnetic valve, left four station two-way cylinders comprise left front oil cylinder and left back oil cylinder, right four station two-way cylinders comprise right front oil cylinder and right back oil cylinder, the oil outlet of oil pump is communicated with the P mouth of the second three position four-way electromagnetic valve, the T mouth of the second three position four-way electromagnetic valve is communicated with the P mouth of the second two-position four-way solenoid valve, the T mouth of the second two-position four-way solenoid valve is communicated with the P mouth of the first three position four-way electromagnetic valve, the T mouth of the first three position four-way electromagnetic valve is communicated with the P mouth of hydraulic steering gear, and the T mouth of hydraulic steering gear is communicated with fuel tank, 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 A mouth of the first three position four-way electromagnetic valve, and the B mouth of the first two-position four-way solenoid valve is connected with the B mouth of the first three position four-way electromagnetic valve, the A mouth of the first three position four-way electromagnetic 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 three position four-way electromagnetic valve, between the rodless cavity of left steering oil cylinder and the rod chamber of right steering oil cylinder, is provided with bidirectional hydraulic lock, the A mouth of the second three position four-way electromagnetic valve divides two-way, be connected with the rodless cavity of left back oil cylinder and right back oil cylinder respectively, the B mouth of the second three position four-way electromagnetic valve divides two-way, be connected with the rod chamber of left back oil cylinder and right back oil cylinder respectively, between the rodless cavity of left back oil cylinder and right back oil cylinder and rod chamber, be provided with bidirectional hydraulic lock respectively simultaneously, the A mouth of the second two-position four-way solenoid valve divides two-way, be connected with the rod chamber of left front oil cylinder and right front oil cylinder respectively, the B mouth of the second two-position four-way solenoid valve divides two-way, be connected with the rodless cavity of left front oil cylinder and right front oil cylinder respectively, between the rodless cavity of left front oil cylinder and right front oil cylinder and rod chamber, be provided with bidirectional hydraulic lock respectively simultaneously.
As improvement, also comprise the 3rd two-position four-way solenoid valve, the P mouth of the 3rd two-position four-way solenoid valve is connected with the A mouth of hydraulic steering gear, the B mouth of the 3rd two-position four-way solenoid valve is connected with the T mouth of hydraulic steering gear, the A mouth of the 3rd two-position four-way solenoid valve is connected with the first actuator port of cross running hydraulic efficiency pressure system, the B mouth of the 3rd two-position four-way solenoid valve is connected with the second actuator port of cross running hydrostatic steering system, utilize hydraulic steering gear simultaneously as the steering power source of cross running, improved the compactedness of system.
Improve again, be provided with pilot overflow valve in the bypass of oil pump oil outlet, realize overvoltage protection.
Improve again, described cross running hydrostatic steering system comprises the first one way sequence valve and the second one way sequence valve, hydraulic oil is a warp point two-way from the first actuator port of this cross running hydrostatic steering system flows into, 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 cross running hydrostatic steering 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 cross running hydrostatic steering system.In cross running process, in the time of 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, promoting left back 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 equates with the overhang of the piston rod of right back oil cylinder, the corner of left back wheel is less than the corner of right rear wheel, the axes intersect that has realized left back wheel and right rear wheel in front left wheel and right front wheel the line of line of centers on, along with the sustainable supply of pressure oil, in the time that 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, the first one way sequence valve is opened, pressure oil enters the rod chamber of left back oil cylinder, the piston rod that promotes left back oil cylinder is retracted, make left back wheel continue to rotate counterclockwise, simultaneously, because the rodless cavity of left back oil cylinder and the rodless cavity oil circuit of right front oil cylinder are connected, in the process of retracting at the piston rod of left back oil cylinder, the rodless cavity pressure oil of left back oil cylinder enters in the rodless cavity of right front oil cylinder, thereby the piston rod that promotes right front oil cylinder stretches out, make to promote right rear wheel continues to rotate counterclockwise simultaneously, similarly, the shortening amount of the piston rod of left back oil cylinder equates with the elongation of the piston rod of right front oil cylinder, still meet the action request that vehicle bends to right, in like manner, in the time that 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.Therefore, adopt this cross running hydrostatic steering system to realize four-wheel four directions to the significantly left and right turn function in driving vehicle cross running process.
Improve again, between the rod chamber of described left back oil cylinder and the rod chamber of right front oil cylinder, be provided with bidirectional hydraulic lock, between the rod chamber of right back oil cylinder and the rod chamber of left front oil cylinder, be provided with bidirectional hydraulic lock, prevent the improper play of hydraulic cylinder piston rod.
Improve again, described the first one way sequence valve and the second one way sequence valve comprise respectively a check valve and the two position three way directional control valve in parallel with this check valve, the T mouth connected tank of this two position three way directional control valve, and control commutation by the pressure of P mouth, wherein check valve 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, realize the function of sequence valve, in the time that P mouth pressure does not reach the force value of setting, the left position of two position three way directional control valve enables, hydraulic oil can not pass through from this two position three way directional control valve, in the time that P mouth pressure rises to the force value of setting, two position three way directional control valve is realized commutation, right position is enabled, thereby hydraulic oil is by this two position three way directional control valve, so just realize the function of sequence valve.
Compared with prior art, owing to the invention has the advantages that: the requirement according to four-wheel four directions to driving vehicle, in the time of longitudinal driving, the front oil cylinder of left and right four station two-way cylinders and the piston rod of rear oil cylinder are all retracted, four wheel correspondences synchronously turn to, left and right four station two-way cylinders use as connecting rod, in the time of cross running, need the axis of front left wheel and right front wheel to align on fore-and-aft direction, and in cross running process, keep maintaining static, left and right four station two-way cylinders use as fork, longitudinally in horizontal handoff procedure, first, 2DT energising, the first two-position four-way solenoid valve changes into closed condition by normally open, then, 4DT energising, the left position of the first three position four-way electromagnetic valve enables, 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, now left, right four station two-way cylinders use as connecting rod, front left wheel and right front wheel drive respectively left back wheel and right rear wheel to rotate, 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, then, 7DT energising, the left position of the second three position four-way electromagnetic valve enables, left, the right left back oil cylinder of four station two-way cylinders and the rodless cavity oil-feed of right back oil cylinder, the piston rod of left back oil cylinder and right back oil cylinder promotes left back wheel and right rear wheel is rotated further, after piston rod puts in place, now left back wheel and right rear wheel are laterally also aligning, thereby get back to the initial condition of cross running, laterally in longitudinal handoff procedure, first, 2DT energising, the right normally open of the first two-position four-way solenoid valve changes into closed condition, then, 3DT energising, the right position of the first three position four-way electromagnetic valve enables, the rod chamber that pressure oil enters right steering oil cylinder promotes piston rod retraction, in like manner due to a left side, the synchronization action of right steering oil cylinder, left, the piston rod of right steering oil cylinder is retracted simultaneously, pull front left wheel and right front wheel to rotate, after putting in place, front left wheel and right front wheel are longitudinally aligning, then 5DT energising, the left position of the second two-position four-way solenoid valve enables, pressure oil enters a left side, the left front oil cylinder of right four station two-way cylinders and the rod chamber of right front oil cylinder, two secondary piston bars are all retracted, then, 6DT energising, the right position of the second three position four-way electromagnetic valve enables, left, the right left back oil cylinder of four station two-way cylinders and the rod chamber oil-feed of right back oil cylinder, after two, the piston rod of oil cylinder is all retracted and is put in place, pull left back wheel and right rear wheel to rotate, now left back wheel and right rear wheel are longitudinally aligning, thereby get back to longitudinal driving state, the present invention adopts hydraulic control system to realize four-wheel four directions to the switching of travelling of driving vehicle portraitlandscape, compare automatically controlled mode, there is better reliability, manufacture and maintenance cost are low simultaneously, easy to maintenance.
Brief description of the drawings
Fig. 1 be in the embodiment of the present invention four-wheel four directions to the driving vehicle portraitlandscape hydraulic principle figure of hydraulic efficiency pressure system switching that travels;
Fig. 2 is the structural representation that in the embodiment of the present invention, four-wheel four directions turns to driving vehicle steering hardware longitudinal driving;
Fig. 3 is the structural representation that in the embodiment of the present invention, four-wheel four directions turns to driving vehicle steering hardware cross running;
Fig. 4 be in the embodiment of the present invention four-wheel four directions to driving vehicle from laterally switching to the initial condition schematic diagram of longitudinal latter two four stations two-way cylinder and four wheels;
Fig. 5 be in the embodiment of the present invention four-wheel four directions to driving vehicle from longitudinally switching to the initial condition schematic diagram of horizontal latter two four stations two-way cylinder and four wheels;
Fig. 6 be in the embodiment of the present invention four-wheel four directions to driving vehicle initial condition schematic diagram of two four station two-way cylinders and four wheels when right-hand corner in cross running state;
Fig. 7 be in the embodiment of the present invention four-wheel four directions to driving vehicle initial condition schematic diagram of two four station two-way cylinders and four wheels when turnon left in cross running state;
Wheel condition schematic diagram when four-wheel four directions turns to driving vehicle steering hardware longitudinal driving in Fig. 8 embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
First, four-wheel four directions in the present embodiment is done to brief description to the driving vehicle portraitlandscape four-wheel four directions that is applied to of hydraulic efficiency pressure system of switching of travelling to the steering hardware of driving vehicle, this four-wheel four directions comprises frame 1 to the steering hardware of driving vehicle, before this frame 1, after, left, right four direction intersection is respectively arranged with front left wheel 22, right front wheel 21, left back wheel 23 and right rear wheel 24, in this front left wheel 22, right front wheel 21, left back 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, between left front spindle arm 32 and left back spindle arm 33, be provided with left four station two-way cylinders 42, between right front spindle arm 31 and right back spindle arm 34, be provided with right four station two-way cylinders 41, be disposed with left steering oil cylinder 52 and right steering oil cylinder 51 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.In the time that longitudinal direction of car travels, left wheel 22,23 and right wheel 21,24 synchronously rotate, and the same point of the axes intersect of front left wheel 22, right front wheel 21, left back wheel 23 and right rear wheel 24 on the diad of left wheel 22,21 and right wheel 23,24; In the time that lateral direction of car travels, front vehicle wheel 22,21 is fixing, and rear wheel 23,24 rotates, and rear wheel 23,24 is in the time of left-right rotation, the axis of two rear wheels 23,24 meet at front vehicle wheel 22,21 the line of line of centers on, as shown in Figure 2,3.
As shown in Fig. 1 to 8, in this enforcement for four-wheel four directions to driving vehicle portraitlandscape travel switch hydraulic efficiency pressure system, comprise and control the left steering oil cylinder 52 that vehicle front left wheel 22 is rotated, with the right steering oil cylinder 51 of controlling vehicle right front wheel 21 and rotating, be arranged on a left side four station two-way cylinders 42 between vehicle front left wheel 22 and left back wheel 23, be arranged on the right side four station two-way cylinders 41 between vehicle right front wheel 21 and right rear wheel 24, oil pump 8, hydraulic steering gear 9, the first two-position four-way solenoid valve 61, the second two-position four-way solenoid valve 62, the 3rd two-position four-way solenoid valve 63, the first three position four-way electromagnetic valve 71 and the second three position four-way electromagnetic valve 72, pilot overflow valve 10, these left side four station two-way cylinders 42 comprise left front oil cylinder 421 and left back oil cylinder 422, right four station two-way cylinders 41 comprise right front oil cylinder 411 and right back oil cylinder 412.
Wherein, the oil outlet of oil pump 8 is communicated with the P mouth of the second three position four-way electromagnetic valve 72, the T mouth of the second three position four-way electromagnetic valve 72 is communicated with the P mouth of the second two-position four-way solenoid valve 62, the T mouth of the second two-position four-way solenoid valve 62 is communicated with the P mouth of the first three position four-way electromagnetic valve 71, the T mouth of the first three position four-way electromagnetic valve 71 is communicated with the P mouth of hydraulic steering gear 9, and the T mouth of hydraulic steering gear 9 is communicated with fuel tank; 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 A mouth of the first three position four-way electromagnetic valve 71, and the B mouth of the first two-position four-way solenoid valve 61 is connected with the B mouth of the first three position four-way electromagnetic valve 71; The A mouth of the first three position four-way electromagnetic valve 71 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 three position four-way electromagnetic valve 71, between the rodless cavity of left steering oil cylinder 52 and the rod chamber of right steering oil cylinder 51, is provided with bidirectional hydraulic lock; The A mouth of the second three position four-way electromagnetic valve 72 divides two-way, be connected with the rodless cavity of right back oil cylinder 412 with left back oil cylinder 422 respectively, the B mouth of the second three position four-way electromagnetic valve 72 divides two-way, be connected with the rod chamber of right back oil cylinder 412 with left back oil cylinder 422 respectively, between the rodless cavity of left back oil cylinder 422 and right back oil cylinder 412 and rod chamber, be provided with bidirectional hydraulic lock respectively simultaneously; The A mouth of the second two-position four-way solenoid valve 62 divides two-way, be connected with the rod chamber of right front oil cylinder 411 with left front oil cylinder 421 respectively, the B mouth of the second two-position four-way solenoid valve 62 divides two-way, be connected with the rodless cavity of right front oil cylinder 411 with left front oil cylinder 421 respectively, between the rodless cavity of left front oil cylinder 421 and right front oil cylinder 411 and rod chamber, be provided with bidirectional hydraulic lock respectively simultaneously.
In addition, the P mouth of the 3rd two-position four-way solenoid valve 63 is connected with the A mouth of hydraulic steering gear 9, the T mouth of the 3rd two-position four-way solenoid valve 63 is connected with the B mouth of hydraulic steering gear 9, the A mouth of the 3rd two-position four-way solenoid valve 63 is connected with the first actuator port of cross running hydrostatic steering system, the B mouth of the 3rd two-position four-way solenoid valve 63 is connected with the second actuator port of cross running hydraulic efficiency pressure system, utilize hydraulic steering gear 9 simultaneously as the steering power source of cross running, improved the compactedness of system.
In addition, be provided with pilot overflow valve 10 in oil pump 8 oil outlet bypasses, realize overvoltage protection.
Simultaneously, described cross running hydrostatic steering system comprises the first one way sequence valve 13 and the second one way sequence valve 14, hydraulic oil is a warp point two-way from the first actuator port of this cross running hydrostatic steering system flows into, connect after the first one way sequence valve 13 and communicate with the rod chamber of left back oil cylinder 422 in one road, 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 cross running hydrostatic steering system, the rod chamber of the left front oil cylinder 421 of another Lu Zeyu communicates, 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 cross running hydrostatic steering system.In cross running process, in the time of 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 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, promoting left back wheel 23 rotates 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, promoting right rear wheel 24 rotates 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 equates with the overhang of the piston rod of right back oil cylinder 412, the corner of left back wheel 23 is less than the corner of right rear wheel 24, the axes intersect that has realized left back wheel 23 and right rear wheel 24 in front left wheel 22 and right front wheel 21 the line of line of centers on, along with the sustainable supply of pressure oil, in the time that the piston rod of left front oil cylinder 421 and the casing wall of left front oil cylinder 421 offset, the pressure of the first actuator port raises, the first one way sequence valve 13 is opened, pressure oil enters the rod chamber of left back oil cylinder 422, the piston rod that promotes left back oil cylinder 422 is retracted, make left back wheel 23 continue to rotate counterclockwise, simultaneously, because the rodless cavity of left back oil cylinder 422 and the rodless cavity oil circuit of right front oil cylinder 411 are connected, in the process of retracting at the piston rod of left back oil cylinder 422, the rodless cavity pressure oil of left back oil cylinder 422 enters in the rodless cavity of right front oil cylinder 411, thereby the piston rod that promotes right front oil cylinder 411 stretches out, make to promote right rear wheel 24 continues to rotate counterclockwise simultaneously, similarly, the shortening amount of the piston rod of left back oil cylinder 422 equates with the elongation of the piston rod of right front oil cylinder 411, still meet the action request that vehicle bends to right, in like manner, in the time that 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.Therefore, adopt this cross running hydrostatic steering system to realize four-wheel four directions to the significantly left and right turn function in driving vehicle cross running process.
In order to prevent the improper play of hydraulic cylinder piston rod, between the rod chamber of left back oil cylinder 422 and the rod chamber of right front oil cylinder 411, be provided with bidirectional hydraulic lock, between the rod chamber of right back oil cylinder 412 and the rod chamber of left front oil cylinder 421, be provided with bidirectional hydraulic lock.
In addition, the first one way sequence valve 13 and the second one way sequence valve 14 comprise respectively a check valve and the two position three way directional control valve in parallel with this check valve, 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 the pressure of P mouth by the first two position three way directional control valve 132 is controlled commutation, wherein, the first check valve 131 in parallel is convenient to hydraulic oil and is back to fuel tank, in addition, utilize the pressure of the P mouth of the first two position three way directional control valve 132 to control the commutation of the first two position three way directional control valve 132, realize the function of sequence valve, in the time that the P mouth pressure of the first two position three way directional control valve 132 does not reach the force value of setting, the left position of the first two position three way directional control valve 132 enables, hydraulic oil can not pass through from this first two position three way directional control valve 132, in the time that the P mouth pressure of the first two position three way directional control valve 132 rises to the force value of setting, the first two position three way directional control valve 132 is realized commutation, right position is enabled, thereby hydraulic oil is by this first two position three way directional control valve 132, so just realize 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.
Following according to electromagnet action schedule, as shown in table 1, and by reference to the accompanying drawings to being further described to the driving vehicle portraitlandscape principle of work of hydraulic efficiency pressure system of switching of travelling for four-wheel four directions.
Table 1, electromagnet action schedule
Requirement according to from four-wheel four directions to driving vehicle, in the time of longitudinal driving, the piston rod of left front oil cylinder 421, left back oil cylinder 422, right front oil cylinder 411 and right back oil cylinder 412 is all retracted, left and right four station two-way cylinders 42,41 use as connecting rod, by being arranged in addition left steering oil cylinder 52 and the right steering oil cylinder 51 in frame 1, realizing four wheel correspondences synchronously turns to, in order to meet the requirement of the axes intersect of four wheels same point on the diad of left wheel 22,23 and right wheel 21,24, as shown in Figure 8; In the time of cross running, need the axis of front left wheel 22 and right front wheel 21 on fore-and-aft direction, align and fix, left and right four station two-way cylinders 42,41 use as fork, rear wheel 23,24 rotates, in order to meet when rear wheel 23,24 left-right rotation, the axis of two rear wheels 23,24 meet at front vehicle wheel 22,21 the line of line of centers on requirement.
In the time of longitudinal driving state, left, right four station two-way cylinders 42, 41 piston rod is in whole retractions locking, use as connecting rod, in the time of longitudinal driving left and right turn, left steering oil cylinder 52 or 51 oil-feeds of right steering oil cylinder, because the rod chamber of left steering oil cylinder 52 and the rodless cavity sectional area of right steering oil cylinder 51 are set to equate, the rod chamber of left steering oil cylinder 52 and the rodless cavity of right steering oil cylinder 51 are cascaded by oil circuit simultaneously, ensured left steering oil cylinder 52 and right steering oil cylinder 51 piston rods synchronization action, the corner of front left wheel flutter 22 and front right wheel flutter 21 is equated, simultaneously, by two four station two-way cylinders 41, 42 connecting rod effect, the rotation of front left wheel flutter 22 and front right wheel flutter 21 is passed to rear left wheel flutter 23 and rear right wheel flutter 24, thereby meet left steering wheel 22, 23 and right steering wheel 21, 24 corner correspondent equal, make four of wheel flutter axially to intersect at left steering wheel 22, 23 and right steering wheel 21, on 24 diad, meet the requirement that longitudinal direction of car travels, as shown in Figure 4.
Longitudinal driving state is to the switching of cross running state, first, 2DT energising, the first two-position four-way solenoid valve 61 changes into closed condition by normally open, then, 4DT energising, the left position of the first three position four-way electromagnetic valve 71 enables, 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 chambers 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, 51 piston rod 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 respectively left back wheel 23 and right rear wheel 24 to rotate, 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, 7DT energising, the left position of the second three position four-way electromagnetic valve 72 enables, the rodless cavity oil-feed of left back oil cylinder 422 and right back oil cylinder 412, the piston rod of left back oil cylinder 422 and right back oil cylinder 412 promotes left back wheel 23 and right rear wheel 24 is rotated further, after piston rod puts in place, now left back wheel 23 and right rear wheel 24 are laterally also aligning, thereby get back to the initial condition of cross running.
When the initial condition of cross running, left, right four station two-way cylinders 42, the state of 41 piston rod, as shown in Figure 5, in cross running process, 1DT energising, the right position of the 3rd two-position four-way solenoid valve 63 enables, hydraulic steering gear 9 is the first actuator port and the second actuator port fuel feeding of cross running hydrostatic steering system, in the time of right-hand corner, the synchronous oil-feed of rodless cavity of the rod chamber of left back oil cylinder 422 and right front oil cylinder 411, in the piston rod compression of left back oil cylinder 422, the piston rod of right front oil cylinder 411 extends, and amount of compression equates with elongation, thereby synchronously drive left back wheel 23 and right rear wheel 24 simultaneously right-hand turning to, as shown in Figure 6, in the time of turnon left, the synchronous oil-feed of rodless cavity of the rod chamber of right back oil cylinder 412 and left front oil cylinder 421, in the piston rod compression of right back oil cylinder 412, the piston rod of left front oil cylinder 421 extends, and amount of compression equates with elongation, thereby synchronously drive left back wheel 23 and right rear wheel 24 simultaneously left-handed turning to, as shown in Figure 7.
Cross running state is to the switching of longitudinal driving state, first, 2DT energising, the right normally open of the first two-position four-way solenoid valve 61 changes into closed condition, then, 3DT energising, the right position of the first three position four-way electromagnetic valve 71 enables, the rod chamber that pressure oil enters right steering oil cylinder 51 promotes piston rod retraction, in like manner due to a left side, right steering oil cylinder 52, 51 synchronization action, left, right steering oil cylinder 52, 51 piston rod is retracted simultaneously, pull front left wheel 22 and right front wheel 21 to rotate, after putting in place, front left wheel 22 and right front wheel 21 are longitudinally aligning, then 5DT energising, the left position of the second two-position four-way solenoid valve 72 enables, pressure oil enters the rod chamber of left front oil cylinder 421 and right front oil cylinder 411, two secondary piston bars are all retracted, then, 6DT energising, the right position of the second three position four-way electromagnetic valve 72 enables, the rod chamber oil-feed of left back oil cylinder 422 and right back oil cylinder 412, after two, the piston rod of oil cylinder is all retracted and is put in place, pull left back wheel 23 and right rear wheel 24 to rotate, now left back wheel 23 and right rear wheel 24 are longitudinally aligning, thereby get back to longitudinal driving state.
To sum up, the present invention adopts hydraulic control system to realize four-wheel four directions to the switching of travelling of driving vehicle portraitlandscape, compares automatically controlled mode, has better reliability, manufacture simultaneously and maintenance cost low, easy to maintenance.
Claims (6)
- One kind for four-wheel four directions to driving vehicle portraitlandscape travel switch hydraulic efficiency pressure system, comprise the right steering oil cylinder of controlling the left steering oil cylinder of vehicle front left wheel rotation and rotating with control vehicle right front wheel, it is characterized in that: also comprise a left side four station two-way cylinders that are arranged between vehicle front left wheel and left back wheel, be arranged on the right side four station two-way cylinders between vehicle right front wheel and right rear wheel, oil pump, hydraulic steering gear, the first two-position four-way solenoid valve, the second two-position four-way solenoid valve, the first three position four-way electromagnetic valve and the second three position four-way electromagnetic valve, left four station two-way cylinders comprise left front oil cylinder and left back oil cylinder, right four station two-way cylinders comprise right front oil cylinder and right back oil cylinder, the oil outlet of oil pump is communicated with the P mouth of the second three position four-way electromagnetic valve, the T mouth of the second three position four-way electromagnetic valve is communicated with the P mouth of the second two-position four-way solenoid valve, the T mouth of the second two-position four-way solenoid valve is communicated with the P mouth of the first three position four-way electromagnetic valve, the T mouth of the first three position four-way electromagnetic valve is communicated with the P mouth of hydraulic steering gear, and the T mouth of hydraulic steering gear is communicated with fuel tank, 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 A mouth of the first three position four-way electromagnetic valve, and the B mouth of the first two-position four-way solenoid valve is connected with the B mouth of the first three position four-way electromagnetic valve, the A mouth of the first three position four-way electromagnetic 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 three position four-way electromagnetic valve, between the rodless cavity of left steering oil cylinder and the rod chamber of right steering oil cylinder, is provided with bidirectional hydraulic lock, the A mouth of the second three position four-way electromagnetic valve divides two-way, be connected with the rodless cavity of left back oil cylinder and right back oil cylinder respectively, the B mouth of the second three position four-way electromagnetic valve divides two-way, be connected with the rod chamber of left back oil cylinder and right back oil cylinder respectively, between the rodless cavity of left back oil cylinder and right back oil cylinder and rod chamber, be provided with bidirectional hydraulic lock respectively simultaneously, the A mouth of the second two-position four-way solenoid valve divides two-way, be connected with the rod chamber of left front oil cylinder and right front oil cylinder respectively, the B mouth of the second two-position four-way solenoid valve divides two-way, be connected with the rodless cavity of left front oil cylinder and right front oil cylinder respectively, between the rodless cavity of left front oil cylinder and right front oil cylinder and rod chamber, be provided with bidirectional hydraulic lock respectively simultaneously.
- 2. hydraulic efficiency pressure system according to claim 1, it is characterized in that: also comprise the 3rd two-position four-way solenoid valve, the P mouth of the 3rd two-position four-way solenoid valve is connected with the A mouth of described hydraulic steering gear, the T mouth of the 3rd two-position four-way solenoid valve is connected with the B mouth of hydraulic steering gear, the A mouth of the 3rd two-position four-way solenoid valve is connected with the first actuator port of cross running hydraulic efficiency pressure system, and the B mouth of the 3rd two-position four-way solenoid valve is connected with the second actuator port of cross running hydrostatic steering system.
- 3. hydraulic efficiency pressure system according to claim 1 and 2, is characterized in that: be provided with pilot overflow valve in the bypass of described oil pump oil outlet.
- 4. hydraulic efficiency pressure system according to claim 2, it is characterized in that: described cross running hydrostatic steering system comprises the first one way sequence valve and the second one way sequence valve, hydraulic oil is a warp point two-way from the first actuator port of this cross running hydrostatic steering system flows into, 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 cross running hydrostatic steering 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 cross running hydrostatic steering system.
- 5. hydraulic efficiency pressure system according to claim 4, it is characterized in that: between the rod chamber of described left back oil cylinder and the rod chamber of right front oil cylinder, be provided with bidirectional hydraulic lock, between the rod chamber of right back oil cylinder and the rod chamber of left front oil cylinder, be provided with bidirectional hydraulic lock.
- 6. hydraulic efficiency pressure system according to claim 5, it is characterized in that: described the first one way sequence valve and the second one way sequence valve comprise respectively a check valve and the two position three way directional control valve in parallel with this check valve, the T mouth connected tank of this two position three way directional control valve, and control commutation by the pressure of P mouth.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110861708A (en) * | 2019-12-17 | 2020-03-06 | 重庆达航工业有限公司 | Four-wheel steering system for aircraft tractor and steering control method |
| CN114352587A (en) * | 2021-12-27 | 2022-04-15 | 江苏指南润滑液压科技有限公司 | Intelligent heliostat hydraulic drive system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010115986A (en) * | 2008-11-12 | 2010-05-27 | Tadano Ltd | Hydraulic circuit structure of steering arrangement |
| CN201646845U (en) * | 2010-04-27 | 2010-11-24 | 宁波如意股份有限公司 | Hydraulic device for controlling engineering vehicle to steer |
| CN102079331A (en) * | 2010-12-27 | 2011-06-01 | 长沙科达建设机械制造有限公司 | Hydraulic control device for multiple drive steering ways of wheel type vehicle |
| US20110132681A1 (en) * | 2009-12-09 | 2011-06-09 | Graeve Joshua D | Steering Control System Combining Electro-Hydraulic And Manually-Actuated Pilot Pressure Control Valves For Safe Operation |
| CN102248964A (en) * | 2011-05-30 | 2011-11-23 | 郭红海 | Four-wheel steering automobile |
| CN102431587A (en) * | 2011-12-13 | 2012-05-02 | 合肥搬易通科技发展有限公司 | Hydraulic valve block for conversion of walking mode of three-drive four-way all-hydraulic forklift truck |
| CN203920884U (en) * | 2014-06-17 | 2014-11-05 | 宁波如意股份有限公司 | A kind of hydraulic efficiency pressure system of travelling and switching to driving vehicle portraitlandscape for four-wheel four directions |
-
2014
- 2014-06-17 CN CN201410269478.4A patent/CN104058003B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010115986A (en) * | 2008-11-12 | 2010-05-27 | Tadano Ltd | Hydraulic circuit structure of steering arrangement |
| US20110132681A1 (en) * | 2009-12-09 | 2011-06-09 | Graeve Joshua D | Steering Control System Combining Electro-Hydraulic And Manually-Actuated Pilot Pressure Control Valves For Safe Operation |
| CN201646845U (en) * | 2010-04-27 | 2010-11-24 | 宁波如意股份有限公司 | Hydraulic device for controlling engineering vehicle to steer |
| CN102079331A (en) * | 2010-12-27 | 2011-06-01 | 长沙科达建设机械制造有限公司 | Hydraulic control device for multiple drive steering ways of wheel type vehicle |
| CN102248964A (en) * | 2011-05-30 | 2011-11-23 | 郭红海 | Four-wheel steering automobile |
| CN102431587A (en) * | 2011-12-13 | 2012-05-02 | 合肥搬易通科技发展有限公司 | Hydraulic valve block for conversion of walking mode of three-drive four-way all-hydraulic forklift truck |
| CN203920884U (en) * | 2014-06-17 | 2014-11-05 | 宁波如意股份有限公司 | A kind of hydraulic efficiency pressure system of travelling and switching to driving vehicle portraitlandscape for four-wheel four directions |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110861708A (en) * | 2019-12-17 | 2020-03-06 | 重庆达航工业有限公司 | Four-wheel steering system for aircraft tractor and steering control method |
| CN110861708B (en) * | 2019-12-17 | 2023-06-27 | 重庆达航工业有限公司 | Four-wheel steering system and steering control method for aircraft tractor |
| CN114352587A (en) * | 2021-12-27 | 2022-04-15 | 江苏指南润滑液压科技有限公司 | Intelligent heliostat hydraulic drive system |
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|---|---|
| CN104058003B (en) | 2016-02-24 |
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