CN203066140U - Land scraper and shovel blade lifting control system thereof - Google Patents
Land scraper and shovel blade lifting control system thereof Download PDFInfo
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- CN203066140U CN203066140U CN 201220724232 CN201220724232U CN203066140U CN 203066140 U CN203066140 U CN 203066140U CN 201220724232 CN201220724232 CN 201220724232 CN 201220724232 U CN201220724232 U CN 201220724232U CN 203066140 U CN203066140 U CN 203066140U
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Abstract
The utility model discloses a land scraper and a shovel blade lifting control system of the land scraper. The shovel lifting control system comprises a hydraulic pump, a first reversing valve set, a second reversing valve set, a left oil cylinder and a right oil cylinder. A first working oil port of the first reversing valve set is selectively communicated with the rod cavity of the left oil cylinder through the second reversing valve set or is communicated with the rod cavity of the left oil cylinder and the rod cavity of the right oil cylinder simultaneously, and a second working oil port is correspondingly communicated with the rodless cavity of the left oil cylinder through the second reversing valve set or is communicated with the rodless cavity of the left oil cylinder and the rodless cavity of the right oil cylinder simultaneously. A third working oil port is selectively communicated with the rod cavity of the right oil cylinder through the second reversing valve set or is communicated with the rod cavity of the right oil cylinder and the rod cavity of the left oil cylinder simultaneously, and a fourth working oil port is correspondingly communicated with the rodless cavity of the right oil cylinder through the second reversing valve set or is communicated with the rodless cavity of the right oil cylinder and the rodless cavity of the left oil cylinder simultaneously. The shovel blade lifting control system can achieve simultaneous motion and independent motion of the left oil cylinder and the right oil cylinder, and has the advantages of being high in operating efficiency and flexible in control mode.
Description
Technical field
The utility model relates to engineering machinery field, particularly a kind of land leveller and perching knife lift control system thereof.
Background technology
Land leveller is a kind of cubic meter of machinery, and its major function is to utilize perching knife to carry out the smooth operation in large-area ground.At present, land leveller is widely used in constructing fields such as roadbed and road surface, build side slope, excavation gutter, also can be applicable to the road surface mixing of materials, clears away the snow, pushes the maintenance of bulk granular material and dirt road and macadam etc.
Perching knife is the apparatus for work of land leveller key, and it is arranged between the wheel shaft of machinery front and back, can carry out actions such as lifting.The lifting of perching knife mainly be keep left right oil cylinder stretch realize, concrete: left and right sides oil cylinder acts on the ball stud of the hitch frame left and right sides respectively, by stretching of oil cylinder piston bar, the hitch frame left and right sides is promoted respectively or reduce, thereby adjust the height at two ends, the perching knife body left and right sides, make the smooth bottom surface that goes out can satisfy the horizontal plane of use or the requirement of certain slope.At present, the flexible of left and right sides oil cylinder is the control of armrest handle operating system.During work, operating personnel operate left and right sides joystick, carry out the control of left and right sides multiple directional control valve, and stretching of control left and right sides oil cylinder reaches the effect of lifting or decline perching knife.The defective of existing lever operated system is: handle control is loaded down with trivial details, can not realize that the integral body of perching knife promotes or decline, and operating efficiency is low.
The utility model content
In view of this, the utility model proposes a kind of perching knife lift control system that can realize the whole lifting of perching knife or decline.
On the one hand, the utility model provides a kind of perching knife lift control system, comprising: hydraulic pump, the first reversal valve group, the second reversal valve group, left oil cylinder and right oil cylinder; Wherein, the first reversal valve group comprises: oil-in, oil return opening, first actuator port, second actuator port, the 3rd actuator port and the 4th actuator port; Oil-in and oil return opening communicate with pressure hydraulic fluid port and the fuel tank of hydraulic pump respectively; First actuator port communicates with the rod chamber of left oil cylinder by second reversal valve group selection ground, or communicate with the rod chamber of left oil cylinder and right oil cylinder simultaneously, second actuator port communicates with the rodless cavity of left oil cylinder by the second reversal valve group accordingly, or communicates with the rodless cavity of left oil cylinder and right oil cylinder simultaneously; The 3rd actuator port communicates with the rod chamber of right oil cylinder by second reversal valve group selection ground, or communicate with the rod chamber of right oil cylinder and left oil cylinder simultaneously, the 4th actuator port communicates with the rodless cavity of right oil cylinder by the second reversal valve group accordingly, or communicates with the rodless cavity of right oil cylinder and left oil cylinder simultaneously.
Further, the described first reversal valve group has six kinds of duties: under first kind of duty, first actuator port communicates with oil-in, and second actuator port communicates with oil return opening; Under second kind of duty, second actuator port communicates with oil-in, and first actuator port communicates with oil return opening; Under the third duty, the 3rd actuator port communicates with oil-in, and the 4th actuator port communicates with oil return opening; Under the 4th kind of duty, the 4th actuator port communicates with oil-in, and the 3rd actuator port communicates with oil return opening; Under the 5th kind of duty, first actuator port and the 3rd actuator port all communicate with oil-in, and second actuator port and the 4th actuator port all communicate with oil return opening; Under the 6th kind of duty, second actuator port and the 4th actuator port all communicate with oil-in, and first actuator port and the 3rd actuator port all communicate with oil return opening.
Further, described perching knife lift control system also comprises: with left handle and the right handles that the first reversal valve group links to each other, left handle and right handles all have two work gears; When left handle was in the first work gear, the first reversal valve group was in first kind of duty; When left handle was in the second work gear, the first reversal valve group was in second kind of duty; When right handles was in the first work gear, the first reversal valve group was in the third duty; When right handles was in the second work gear, the first reversal valve group was in the 4th kind of duty; When left handle and right handles all were in the first work gear, the first reversal valve group was in the 5th kind of duty; When left handle and right handles all were in the second work gear, the first reversal valve group was in the 6th kind of duty.
Further, described hydraulic pump is load sensitive pump.
Further, the described first reversal valve group is the load-sensitive multiple directional control valve.
Further, the described second reversal valve group comprises: first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 5th reversal valve, the 6th reversal valve and flow divider-combiner; First actuator port optionally communicates with the rod chamber of left oil cylinder or the afflux hydraulic fluid port of flow divider-combiner by first reversal valve; The 3rd actuator port optionally communicates with the afflux hydraulic fluid port of flow divider-combiner or the rod chamber of right oil cylinder by the 3rd reversal valve; The first shunting hydraulic fluid port of flow divider-combiner optionally communicates with the rod chamber of left oil cylinder by the 5th reversal valve or is cut off; The second shunting hydraulic fluid port of flow divider-combiner communicates with the rod chamber of right oil cylinder; Second actuator port optionally communicates with the rodless cavity of left oil cylinder or the afflux oil circuit of afflux bleed off circuit by second reversal valve; The 4th actuator port optionally communicates with the afflux oil circuit of afflux bleed off circuit or the rodless cavity of right oil cylinder by the 4th reversal valve; First bleed off circuit of afflux bleed off circuit optionally communicates with the rodless cavity of left oil cylinder by the 6th reversal valve or is cut off; Second bleed off circuit of afflux bleed off circuit communicates with the rodless cavity of right oil cylinder.
Further, described first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 5th reversal valve, the 6th reversal valve are solenoid operated directional valve; When first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 5th reversal valve, the 6th reversal valve all when electric, first actuator port communicates with the afflux hydraulic fluid port of flow divider-combiner by first reversal valve, and second actuator port communicates with the afflux oil circuit of afflux bleed off circuit by second reversal valve; The 3rd actuator port communicates with the afflux hydraulic fluid port of flow divider-combiner by the 3rd reversal valve, and the 4th actuator port communicates with the afflux oil circuit of afflux bleed off circuit by the 4th reversal valve; The first shunting hydraulic fluid port of flow divider-combiner communicates with the rod chamber of left oil cylinder by the 5th reversal valve; The second shunting hydraulic fluid port of flow divider-combiner communicates with the rod chamber of right oil cylinder; First bleed off circuit of afflux bleed off circuit communicates with the rodless cavity of left oil cylinder by the 6th reversal valve; Second bleed off circuit of afflux bleed off circuit communicates with the rodless cavity of right oil cylinder; When first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 5th reversal valve, the equal dead electricity of the 6th reversal valve, first actuator port communicates with the rod chamber of left oil cylinder by first reversal valve, second actuator port communicates with the rodless cavity of left oil cylinder by second reversal valve, the 3rd actuator port communicates with the rod chamber of right oil cylinder by the 3rd reversal valve, and the 4th actuator port communicates with the rodless cavity of right oil cylinder by the 4th reversal valve.
Further, described first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve are the two-position three way solenoid operated directional valve.
Further, described the 5th reversal valve and the 6th reversal valve are the bi-bit bi-pass solenoid operated directional valve.
On the other hand, the utility model also provides a kind of land leveller, and it is provided with above-mentioned any described perching knife lift control system.
A kind of perching knife lift control system that the utility model provides, it has the following advantages:
Stretch out when 1) can realize left and right sides oil cylinder or regain, improve operating efficiency, and control mode is flexible.Further, also can realize being synchronized with the movement of left and right sides oil cylinder by in the second reversal valve group, flow divider-combiner being set, reduce in the work progress smoothing time to perching knife.In addition, carry out machinery control by left and right sides handle, operating personnel can realize above-mentioned functions by independent operation left handle or right handles, thus, left hand or the right hand that on the one hand can liberate the operator are used for controlling steering wheel, the demand of the habitual usefulness of the person hand difference that also can satisfy the different operating on the other hand, can realize that single lever operated left and right sides oil cylinder moves simultaneously, be a cover monolever coordinated control system.
The mode that keeps the left and right sides oil cylinder independently moving when 2) realizing the left and right sides oil cylinder action time, the operator can guarantee the reliability of control system according to concrete operating mode demand switching controls mode at any time.
The utility model also provides a kind of land leveller, and this land leveller is provided with above-mentioned perching knife lift control system, because above-mentioned any perching knife lift control system has above-mentioned technique effect.
Description of drawings
The accompanying drawing that constitutes a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model.In the accompanying drawings:
The principle schematic of the perching knife jacking system that Fig. 1 provides for the utility model embodiment one;
The principle schematic of the load sensitive pump in the perching knife jacking system that Fig. 2 provides for the utility model embodiment;
Load-sensitive multiple directional control valve principle schematic in the perching knife jacking system that Fig. 3 provides for the utility model embodiment.
Description of reference numerals:
7 left oil cylinder 8 right oil cylinders
9 hydraulic pumps, 10 second reversal valve groups
11 first reversal valve group A1, first actuator port
The A2 second actuator port B1 the 3rd actuator port
B2 the 4th actuator port A first reversal valve
The B second reversal valve C the 3rd reversal valve
D the 4th reversal valve E the 5th reversal valve
F the 6th reversal valve G flow divider-combiner
The g0 afflux hydraulic fluid port g1 first shunting hydraulic fluid port
The g2 second shunting hydraulic fluid port 100 afflux oil circuits
101 first bleed off circuits, 102 second bleed off circuits
The specific embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment in the utility model can make up mutually.Below in conjunction with accompanying drawing, each preferred embodiment of the present utility model is described further:
Fig. 1 shows the schematic diagram of the perching knife jacking system that the utility model embodiment one provides.The perching knife lift control system that present embodiment provides comprises: hydraulic pump 9, the first reversal valve group 11, the second reversal valve group 10, left oil cylinder 7 and right oil cylinder 8; Wherein,
The first reversal valve group 11 comprises: oil inlet P, oil return inlet T, the first actuator port A1, the second actuator port A2, the 3rd actuator port B1 and the 4th actuator port B2;
Oil inlet P and oil return inlet T communicate with pressure hydraulic fluid port and the fuel tank of hydraulic pump 9 respectively;
The first actuator port A1 optionally communicates with the rod chamber of left oil cylinder 7 by the second reversal valve group 10, or communicate with the rod chamber of left oil cylinder 7 and right oil cylinder 8 simultaneously, the second actuator port A2 communicates with the rodless cavity of left oil cylinder 7 by the second reversal valve group 10 accordingly, or communicates with the rodless cavity of left oil cylinder 7 and right oil cylinder 8 simultaneously;
The 3rd actuator port B1 optionally communicates with the rod chamber of right oil cylinder 8 by the second reversal valve group 10, or communicate with the rod chamber of right oil cylinder 8 and left oil cylinder 7 simultaneously, the 4th actuator port B2 communicates with the rodless cavity of right oil cylinder 8 by the second reversal valve group 10 accordingly, or communicates with the rodless cavity of right oil cylinder 8 and left oil cylinder 7 simultaneously.
In the perching knife lift control system that present embodiment provides, left oil cylinder 7 and right oil cylinder 8 are arranged at the left and right sides of land leveller perching knife respectively, the lifting of stretching out and regaining realization perching knife left and right sides of left oil cylinder 7 and right oil cylinder 8.In the present embodiment, left oil cylinder 7 is regained and is driven the lifting of perching knife left side, stretches out drive perching knife left side and descends.Accordingly, right oil cylinder 8 is regained and is driven the lifting of perching knife right side, stretches out to drive the decline of perching knife right side.
It is left oil cylinder 7 and right oil cylinder 8 fuel feeding that hydraulic pump 9 is used for by the first reversal valve group 11 and the second reversal valve group 10, and then provides the oil pressure that oil cylinder is stretched out and regain for left oil cylinder 7 and right oil cylinder 8.The effect of the first reversal valve group 11 and the second reversal valve group 10 is the hydraulic oil that hydraulic pump feeds is led, and makes hydraulic oil optionally be rod chamber and the rodless cavity fuel feeding of left oil cylinder 7 and right oil cylinder 8, realizes that thus left and right sides oil cylinder promotes descend controlled.
Specifically, the second reversal valve group 10 has following duty:
(1), the first actuator port A1 is communicated with the rod chamber of left oil cylinder 7 by the second reversal valve group 10, the second actuator port A2 communicates with the rodless cavity of left oil cylinder 7 by the second reversal valve group 10.Under this state, left oil cylinder 7 stretches out separately or regains.
(2), the first actuator port A1 is communicated by the rod chamber of the second reversal valve group 10 with left oil cylinder 7 and right oil cylinder 8, the second actuator port A2 communicates by the rodless cavity of the second reversal valve group 10 with left oil cylinder 7 and right oil cylinder 8.Under this state, left oil cylinder 7 and right oil cylinder 8 all stretch out simultaneously or regain simultaneously.
(3), the 3rd actuator port B1 communicates with the rod chamber of right oil cylinder 8 by the second reversal valve group 10, the 4th actuator port B2 communicates with the rodless cavity of right oil cylinder 8 by the second reversal valve group 10.Under this state, right oil cylinder 8 stretches out separately or regains.
(4), the 3rd actuator port B1 communicates by the rod chamber of the second reversal valve group 10 with right oil cylinder 8 and left oil cylinder 7, the 4th actuator port B2 communicates by the rodless cavity of the second reversal valve group 10 with right oil cylinder 8 and left oil cylinder 7.Under this state, left oil cylinder 7 and right oil cylinder 8 all stretch out simultaneously or regain simultaneously.
In addition, as shown in the above, the second reversal valve group 10 also has above-mentioned (2) and (4) stack back duty, that is:
(5), the first actuator port A1 and the 3rd actuator port B1 are communicated by the rod chamber of the second reversal valve group 10 with left oil cylinder 7 and right oil cylinder 8, the second actuator port A2 and the 4th actuator port B2 communicate by the rodless cavity of the second reversal valve group 10 with left oil cylinder 7 and right oil cylinder 8.Under this state, left oil cylinder 7 and right oil cylinder all stretch out simultaneously or regain simultaneously, and stretch out or the responsiveness regained very fast.
Accordingly, the above-mentioned first reversal valve group 11 preferably has following six kinds of duties:
Under first kind of duty, the first actuator port A1 communicates with oil inlet P, and the second actuator port A2 communicates with oil return inlet T;
Under second kind of duty, the second actuator port A2 communicates with oil inlet P, and the first actuator port A1 communicates with oil return inlet T;
Under the third duty, the 3rd actuator port B1 communicates with oil inlet P, and the 4th actuator port B2 communicates with oil return inlet T;
Under the 4th kind of duty, the 4th actuator port B2 communicates with oil inlet P, and the 3rd actuator port B1 communicates with oil return inlet T;
Under the 5th kind of duty, the first actuator port A1 and the 3rd actuator port B1 all communicate with oil inlet P, and the second actuator port A2 and the 4th actuator port B2 all communicate with oil return inlet T;
Under the 6th kind of duty, the second actuator port A2 and the 4th actuator port B2 all communicate with oil inlet P, and the first actuator port A1 and the 3rd actuator port B1 all communicate with oil return inlet T.
The above-mentioned first reversal valve group 11 can be the valve group that can realize above-mentioned functions well known to those skilled in the art.
Thus, this perching knife lift control system can be realized the following forms of motion of left oil cylinder 7 and right oil cylinder 8:
LU, the first reversal valve group 11 are in first kind of duty, and the second reversal valve group 10 is in (1) duty:
LD, the first reversal valve group 11 are in second kind of duty, and the second reversal valve group 10 is in (1) duty:
RU, the first reversal valve group 11 are in the third duty, and the second reversal valve group 10 is in (3) duty:
RD, the first reversal valve group 11 are in the 4th kind of duty, and the second reversal valve group 10 is in (3) duty:
U1, the first reversal valve group 11 are in first kind of duty, and the second reversal valve group 10 is in (2) duty:
D1, the first reversal valve group 11 are in second kind of duty, and the second reversal valve group 10 is in (2) duty:
U2, the first reversal valve group 11 are in the third duty, and the second reversal valve group 10 is in (4) duty:
D2, the first reversal valve group 11 are in the 4th kind of duty, and the second reversal valve group 10 is in (4) duty:
U3, the first reversal valve group 11 are in the 5th kind of duty, and the second reversal valve group 10 is in (5) duty:
D3, the first reversal valve group 11 are in the 6th kind of duty, and the second reversal valve group 10 is in (5) duty:
Concrete structure for the second reversal valve group 10 preferably as shown in Figure 1, specifically comprises: the first reversal valve A, the second reversal valve B, the 3rd reversal valve C, the 4th reversal valve D, the 5th reversal valve E, the 6th reversal valve F and flow divider-combiner G;
The first actuator port A1 optionally communicates with the rod chamber of left oil cylinder 7 or the afflux hydraulic fluid port g0 of flow divider-combiner G by the first reversal valve A;
The 3rd actuator port B1 optionally communicates with the afflux hydraulic fluid port g0 of flow divider-combiner G or the rod chamber of right oil cylinder 8 by the 3rd reversal valve C;
The first shunting hydraulic fluid port g1 of flow divider-combiner G optionally communicates with the rod chamber of left oil cylinder 7 by the 5th reversal valve E or is cut off; The second shunting hydraulic fluid port g2 of flow divider-combiner G communicates with the rod chamber of right oil cylinder 8;
The second actuator port A2 optionally communicates with the rodless cavity of left oil cylinder 7 or the afflux oil circuit 100 of afflux bleed off circuit by the second reversal valve B;
The 4th actuator port B2 optionally communicates with the afflux oil circuit 100 of afflux bleed off circuit or the rodless cavity of right oil cylinder 8 by the 4th reversal valve D;
First bleed off circuit 101 of afflux bleed off circuit optionally communicates with the rodless cavity of left oil cylinder 7 by the 6th reversal valve E or is cut off; Second bleed off circuit 102 of afflux bleed off circuit communicates with the rodless cavity of right oil cylinder 8.
This kind second reversal valve group 10 has two kinds of mode of operations, is respectively linkage pattern (left and right sides oil cylinder moves simultaneously) and non-linkage pattern (left and right sides oil cylinder independently moving).Particularly:
Under the non-linkage pattern: the first actuator port A1 communicates with the rod chamber of left oil cylinder 7 by the first reversal valve A, the second actuator port A2 communicates with the rodless cavity of left oil cylinder 7 by the second reversal valve B, the 3rd actuator port B1 communicates with the rod chamber of right oil cylinder 8 by the 3rd reversal valve C, and the 4th actuator port B2 communicates with the rodless cavity of right oil cylinder 8 by the 4th reversal valve D.
Under the linkage pattern: the first actuator port A1 communicates with the afflux hydraulic fluid port g0 of flow divider-combiner G by the first reversal valve A, and the second actuator port A2 communicates with the afflux oil circuit 100 of afflux bleed off circuit by the second reversal valve B; The 3rd actuator port B1 communicates with the afflux hydraulic fluid port g0 of flow divider-combiner G by the 3rd reversal valve C, and the 4th actuator port B2 communicates with the afflux oil circuit 100 of afflux bleed off circuit by the 4th reversal valve D; The first shunting hydraulic fluid port g1 of flow divider-combiner G communicates with the rod chamber of left oil cylinder 7 by the 5th reversal valve E; The second shunting hydraulic fluid port g2 of flow divider-combiner G communicates with the rod chamber of right oil cylinder 8; First bleed off circuit 101 of afflux bleed off circuit communicates with the rodless cavity of left oil cylinder 7 by the 6th reversal valve F; Second bleed off circuit 102 of afflux bleed off circuit communicates with the rodless cavity of right oil cylinder 8.
Non-linkage pattern comprises two kinds of duties:
N1, the first actuator port A1 communicate with the rod chamber of left oil cylinder 7 by the first reversal valve A, and the second actuator port A2 communicates with the rodless cavity of left oil cylinder 7 by the second reversal valve B.This kind state is corresponding to above-mentioned state (1).
N2, the 3rd actuator port B1 communicate with the rod chamber of right oil cylinder 8 by the 3rd reversal valve C, and the 4th actuator port B2 communicates with the rodless cavity of right oil cylinder 8 by the 4th reversal valve D.This kind state is corresponding to above-mentioned state (3).
Interlock shape pattern comprises three kinds of duties:
L1, the first actuator port A1 communicate with the afflux hydraulic fluid port g0 of flow divider-combiner G by the first reversal valve A, the first shunting hydraulic fluid port g1 of flow divider-combiner G communicates with the rod chamber of left oil cylinder 7 by the 5th reversal valve E, and the second shunting hydraulic fluid port g2 of flow divider-combiner G communicates with the rod chamber of right oil cylinder 8; Accordingly, the second actuator port A2 communicates with the afflux oil circuit 100 of afflux bleed off circuit by the second reversal valve B; First shunting oily 101 tunnel of afflux bleed off circuit 100 communicates with the rodless cavity of left oil cylinder 7 by the 6th reversal valve E, and second bleed off circuit 102 communicates with the rodless cavity of right oil cylinder 8.This kind state is corresponding to above-mentioned state (2).
L2, the 3rd actuator port B1 communicate with the afflux hydraulic fluid port g0 of flow divider-combiner G by the 3rd reversal valve C, the first shunting hydraulic fluid port g1 of flow divider-combiner G communicates with the rod chamber of left oil cylinder 7 by the 5th reversal valve E, and the second shunting hydraulic fluid port g2 of flow divider-combiner G communicates with the rod chamber of right oil cylinder 8.Accordingly, the 4th actuator port B2 communicates with the afflux oil circuit 100 of afflux bleed off circuit by the 4th reversal valve D, first shunting oily 101 tunnel of afflux bleed off circuit 100 communicates with the rodless cavity of left oil cylinder 7 by the 6th reversal valve E, and second bleed off circuit 102 communicates with the rodless cavity of right oil cylinder 8.This kind state is corresponding to above-mentioned state (4).
L3, the first actuator port A1 communicate with the afflux hydraulic fluid port g0 of flow divider-combiner G by the first reversal valve A, the 3rd actuator port B1 also communicates with the afflux hydraulic fluid port g0 of flow divider-combiner G by the 3rd reversal valve C simultaneously, the first shunting hydraulic fluid port g1 of flow divider-combiner G communicates with the rod chamber of left oil cylinder 7 by the 5th reversal valve E, and the second shunting hydraulic fluid port g2 of flow divider-combiner G communicates with the rod chamber of right oil cylinder 8; Accordingly, the second actuator port A2 communicates with the afflux oil circuit 100 of afflux bleed off circuit by the second reversal valve B; The 4th actuator port B2 also communicates with the afflux oil circuit 100 of afflux bleed off circuit by the 4th reversal valve D; First shunting oily 101 tunnel of afflux bleed off circuit 100 communicates by the rodless cavity of the 6th reversal valve with E left side oil cylinder 7, and second bleed off circuit 102 communicates with the rodless cavity of right oil cylinder 8.This kind state is corresponding to above-mentioned state (5).
For the N1 state:
When the first reversal valve group 11 was in first duty, then left oil cylinder 7 was regained separately, corresponding to above-mentioned state LU;
When the first reversal valve group 11 was in second duty, then left oil cylinder 7 stretched out separately, corresponding to above-mentioned state LD;
For the N2 state:
When the first reversal valve group 11 was in the third duty, then right oil cylinder 8 was regained separately, corresponding to above-mentioned state RU;
When the first reversal valve group 11 was in the 4th kind of duty, then right oil cylinder 8 stretched out separately, corresponding to above-mentioned state RD;
For the L1 state:
When the first reversal valve group 11 was in first kind of duty, then left oil cylinder 7 and right oil cylinder 8 were all regained, corresponding to above-mentioned state U1;
When the first reversal valve group 11 was in second kind of duty, then left oil cylinder 7 and right oil cylinder 8 all stretched out, corresponding to above-mentioned state D1;
For the L2 state:
When the first reversal valve group 11 was in the third duty, then left oil cylinder 7 and right oil cylinder 8 were all regained, corresponding to above-mentioned state U2;
When the first reversal valve group 11 was in the 4th kind of duty, then left oil cylinder 7 and right oil cylinder 8 all stretched out, corresponding to above-mentioned state D2;
For the L3 state,
When the first reversal valve group 11 was in the 5th kind of duty, then left oil cylinder 7 and right oil cylinder 8 were all regained, and withdrawal speed is very fast, corresponding to above-mentioned state U3;
When the first reversal valve group 11 was in the 6th kind of duty, then left oil cylinder 7 and right oil cylinder 8 all stretched out, and withdrawal speed is very fast, corresponding to above-mentioned state D3.
The above-mentioned second reversal valve group 10 is provided with flow divider-combiner G, and it comprises an afflux hydraulic fluid port g0 and communicates two with this afflux hydraulic fluid port g0 shunts hydraulic fluid port, is respectively the first shunting hydraulic fluid port g1 and the second shunting hydraulic fluid port g2.The effect of flow divider-combiner G is: when being in the second reversal valve group 10 and being in linkage status, realize the synchronous withdrawal of left oil cylinder 7 and right oil cylinder 8 or stretch out.Concrete, the hydraulic oil that enters this valve from the afflux hydraulic fluid port go of flow divider-combiner G can be made into two strands of hydraulic oil that oil pressure equates by average mark and discharge from the first shunting hydraulic fluid port g1 and the second shunting hydraulic fluid port g2 respectively, under above-mentioned U1, U2 and U3 state, the hydraulic oil oil pressure that then can realize entering in left oil cylinder 7 and right oil cylinder 8 rod chambers equates, realizes the synchronous withdrawal of left and right sides oil cylinder thus.Two strands of hydraulic oil that enter from the first shunting hydraulic fluid port g1 and the second shunting hydraulic fluid port g2 of flow divider-combiner G enter this valve with identical speed and are discharged by afflux hydraulic fluid port go in meeting, under above-mentioned D1, D2 and D3 state, can realize that then the hydraulic oil oil pressure of discharging equates, realizes stretching out synchronously of left and right sides oil cylinder thus in left oil cylinder 7 and right oil cylinder 8 rod chambers.
For the ease of control, the above-mentioned first reversal valve A, the second reversal valve B, the 3rd reversal valve C, the 4th reversal valve D, the 5th reversal valve E, the 6th reversal valve F preferably are solenoid operated directional valve, when above-mentioned six equal dead electricity of electromagnetic valve, the second reversal valve group 10 is in non-linkage status; When above-mentioned six electromagnetic valves all when electric, the second reversal valve group 10 is in linkage status.
Further, the above-mentioned first reversal valve A, the second reversal valve B, the 3rd reversal valve C, the 4th reversal valve D can be the two-position three way solenoid operated directional valve.The 5th reversal valve E and the 6th reversal valve F can be the bi-bit bi-pass solenoid operated directional valve.
In the above-mentioned perching knife lift control system, hydraulic pump 9 is preferably load sensitive pump.Further, the first reversal valve group 11 is the load-sensitive multiple directional control valve.Accordingly, the first reversal valve group 11 is provided with load-sensitive hydraulic fluid port LS.Adopt the advantage of above-mentioned hydraulic pump and reversal valve to be: hydraulic pump 9 can be adjusted discharge capacity and output pressure according to load variations, has energy-saving effect preferably.This load sensitive pump and load-sensitive multiple directional control valve can be structure well known to those skilled in the art, specifically can distinguish as shown in Figures 2 and 3.
For the ease of controlling the above-mentioned mode of operation of the first reversal valve group 11, the perching knife lift control system that the utility model embodiment provides also preferably includes: with left handle and the right handles that the first reversal valve group 11 links to each other, left handle and right handles all have two work gears;
When left handle was in the first work gear, first reversal valve was in first kind of duty;
When left handle was in the second work gear, first reversal valve was in second kind of duty;
When right handles was in the first work gear, first reversal valve was in the third duty;
When right handles was in the second work gear, first reversal valve was in the 4th kind of duty;
When left handle and right handles all were in the first work gear, first reversal valve was in the 5th kind of duty;
When left handle and right handles all were in the second work gear, first reversal valve was in the 6th kind of duty.
In addition, (linkage pattern-electromagnetic valve all for the ease of two kinds of mode of operations controlling the second reversal valve group 10, the equal dead electricity of non-linkage pattern-electromagnetic valve), above-mentioned perching knife lift control system also preferably is provided with the interlock gauge tap that links to each other with the second reversal valve group 10, and this interlock gauge tap is used for making the second reversal valve group 10 be in linkage pattern and non-linkage pattern.For example: when opening the interlock gauge tap, the second reversal valve group 10 is in non-linkage pattern, and behind the unlatching interlock gauge tap, the second reversal valve group 10 is in linkage pattern.Above-mentioned interlock gauge tap can be arranged on the control panel, perhaps is arranged on left handle or the right handles.
Stretch out with oil cylinder and to drive perching knife and descend, regain and drive perching knife and promote and be example, for being provided with left and right sides handle, perching knife lift control system as shown in Figure 1, its concrete operating principle is as follows:
The following setting of valve duty:
When not pressing the interlock gauge tap: the equal dead electricity of the first reversal valve A to the, six reversal valve F, the first reversal valve A and the second reversal valve B all are in position, a left side, and the 3rd reversal valve C and the 4th reversal valve D all are in right position, and the 5th reversal valve E and the 6th reversal valve F all are in the next.
Press interlock during gauge tap: the first reversal valve A to the, six reversal valve F all electric, the first reversal valve A and the second reversal valve B all are in right position, the 3rd reversal valve C and the 4th reversal valve D all are in a left side, the 5th reversal valve E and the 6th reversal valve F all are in upper.
During the post-tensioning left handle: the first actuator port A1 of the first reversal valve group communicates with oil inlet P, and the second actuator port A2 communicates with oil return inlet T, and the 3rd actuator port B1 and the 4th actuator port B2 all end.
Before when pushing away left handle: the second actuator port A2 of the first reversal valve group communicates with oil inlet P, and the first actuator port A1 communicates with oil return inlet T, and the 3rd actuator port B1 and the 4th actuator port B2 all end.
During the post-tensioning right handles: the 3rd actuator port B1 of the first reversal valve group communicates with oil inlet P, and the 4th actuator port B2 communicates with oil return inlet T, and the first actuator port A1 and the second actuator port A2 all end.
Before when pushing away right handles: the 4th actuator port B2 of the first reversal valve group communicates with oil inlet P, and the 3rd actuator port B1 communicates with oil return inlet T, and the first actuator port A1 and the second actuator port A2 all end.
Simultaneously during the handle of the post-tensioning left and right sides: the first actuator port A1 and the 3rd actuator port B1 of the first reversal valve group all communicate with oil inlet P, and the second actuator port A2 and the 4th actuator port B2 all communicate with oil return inlet T.
When pushing away left and right sides handle simultaneously: the second actuator port A2 and the 4th actuator port B2 of the first reversal valve group all communicate with oil inlet P, and the first actuator port A1 and the 3rd actuator port B1 all communicate with oil return inlet T.
Specific operation process is as follows:
Do not press the situation of interlock gauge tap
The post-tensioning left handle:
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port a1 of the first reversal valve A by the first actuator port A1, and hydraulic fluid port a1 communicates with the rod chamber of left oil cylinder 7 by hydraulic fluid port a2, and hydraulic fluid port a3 ends.The rodless cavity of left side oil cylinder 7 communicates with hydraulic fluid port b1 by the hydraulic fluid port b2 of the second reversal valve B, and hydraulic fluid port b3 ends, and hydraulic fluid port b1 communicates with oil return inlet T by the second actuator port A2 of the first reversal valve group.At this moment, left oil cylinder 7 is regained separately, drives the perching knife left side and promotes.
Before push away left handle
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port b1 of the second reversal valve B by the second actuator port A2, and hydraulic fluid port b1 communicates with the rodless cavity of left oil cylinder 7 by hydraulic fluid port b2, and hydraulic fluid port b1 ends.The rod chamber of left side oil cylinder 7 communicates with hydraulic fluid port a1 by the hydraulic fluid port a2 of the first reversal valve A, and hydraulic fluid port a3 ends, and hydraulic fluid port a1 communicates with oil return inlet T by the first actuator port A1 of the first reversal valve group.At this moment, left oil cylinder 7 stretches out separately, drives the perching knife left side and descends.
The post-tensioning right handles
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port c1 of the 3rd reversal valve C by the 3rd actuator port B1, and hydraulic fluid port c1 communicates with the rod chamber of right oil cylinder 8 by hydraulic fluid port c3, and hydraulic fluid port c2 ends.The rodless cavity of right oil cylinder 8 communicates with hydraulic fluid port d1 by the hydraulic fluid port d3 of the 4th reversal valve D, and hydraulic fluid port d2 ends, and hydraulic fluid port d1 communicates with oil return inlet T by the 4th actuator port B2 of the first reversal valve group.At this moment, right oil cylinder 8 is regained separately, drives the perching knife right side and promotes.
Before push away right handles
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port d1 of the 4th reversal valve D by the 4th actuator port B2, and hydraulic fluid port d1 communicates with the rodless cavity of right oil cylinder 8 by hydraulic fluid port d3, and hydraulic fluid port d2 ends.The rod chamber of right oil cylinder 8 communicates with hydraulic fluid port c1 by the hydraulic fluid port c3 of the 3rd reversal valve C, and hydraulic fluid port c2 ends, and hydraulic fluid port c1 communicates with oil return inlet T by the 3rd actuator port B1 of the first reversal valve group.At this moment, right oil cylinder 8 stretches out separately, drives the perching knife right side and descends.
Press the situation of interlock gauge tap
The post-tensioning left handle
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port a1 of the first reversal valve A by the first actuator port A1, hydraulic fluid port a1 communicates with the afflux hydraulic fluid port g0 of flow divider-combiner G by hydraulic fluid port a3, the first shunting hydraulic fluid port g1 communicates with the rod chamber of left oil cylinder 7 by hydraulic fluid port e1 and the e2 of the 5th reversal valve E successively, and the second shunting hydraulic fluid port g2 communicates with the rod chamber of right oil cylinder 8.The rodless cavity of left side oil cylinder 7 communicates with first bleed off circuit 101 of afflux bleed off circuit by hydraulic fluid port f2 and the f1 of the 6th reversal valve F successively, the rodless cavity of right oil cylinder 8 is logical to communicate with second bleed off circuit 102, afflux oil circuit 100 communicates with the second actuator port A2 of the first reversal valve group by hydraulic fluid port b3 and the hydraulic fluid port b1 of the second reversal valve b successively, and the second actuator port A2 communicates with oil return inlet T.At this moment, left oil cylinder 7 and right oil cylinder 8 are regained synchronously, drive the whole lifting of perching knife.
Before push away left handle
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port b1 of the second reversal valve B by the second actuator port A2, hydraulic fluid port b1 communicates with afflux oil circuit 100 by hydraulic fluid port b3, first bleed off circuit 101 communicates with the rodless cavity of left oil cylinder 7 by hydraulic fluid port f1 and the f2 of the 6th reversal valve F successively, and the rodless cavity of second bleed off circuit 102 and right oil cylinder 8 is logical to communicate.The rod chamber of left side oil cylinder 7 communicates with the first shunting hydraulic fluid port g1 by hydraulic fluid port e2 and the e1 of the 5th reversal valve E successively, the rod chamber of right oil cylinder 8 communicates with the second shunting hydraulic fluid port g2, the afflux hydraulic fluid port g0 of flow divider-combiner G communicates with the first actuator port A1 of the first reversal valve group by hydraulic fluid port a3 and the a1 of the first reversal valve A successively, and the first actuator port A1 communicates with oil return inlet T.At this moment, left oil cylinder 7 and right oil cylinder 8 stretch out synchronously, drive the whole decline of perching knife.
The post-tensioning right handles
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port c1 of the 3rd reversal valve C by the 3rd actuator port B1, hydraulic fluid port c1 communicates with the afflux hydraulic fluid port g0 of flow divider-combiner G by hydraulic fluid port c2, the first shunting hydraulic fluid port g1 communicates with the rod chamber of left oil cylinder 7 by hydraulic fluid port e1 and the e2 of the 5th reversal valve E successively, and the second shunting hydraulic fluid port g2 communicates with the rod chamber of right oil cylinder 8.The rodless cavity of left side oil cylinder 7 communicates with first bleed off circuit 101 of afflux bleed off circuit by hydraulic fluid port f2 and the f1 of the 6th reversal valve F successively, the rodless cavity of right oil cylinder 8 is logical to communicate with second bleed off circuit 102, afflux oil circuit 100 communicates with the 4th actuator port B2 of the first reversal valve group by hydraulic fluid port d3 and the hydraulic fluid port d1 of the 4th reversal valve D successively, and the 4th actuator port B2 communicates with oil return inlet T.At this moment, left oil cylinder 7 and right oil cylinder 8 are regained synchronously, drive the whole lifting of perching knife.
Before push away right handles
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port d1 of the 4th reversal valve D by the 4th actuator port B2, hydraulic fluid port d1 communicates with afflux oil circuit 100 by hydraulic fluid port d3, first bleed off circuit 101 communicates with the rodless cavity of left oil cylinder 7 by hydraulic fluid port f1 and the f2 of the 6th reversal valve F successively, and the rodless cavity of second bleed off circuit 102 and right oil cylinder 8 is logical to communicate.The rod chamber of left side oil cylinder 7 communicates with the first shunting hydraulic fluid port g1 by hydraulic fluid port e2 and the e1 of the 5th reversal valve E successively, the rod chamber of right oil cylinder 8 communicates with the second shunting hydraulic fluid port g2, the afflux hydraulic fluid port g0 of flow divider-combiner G communicates with the 3rd actuator port B1 of the first reversal valve group by hydraulic fluid port c3 and the c1 of the 3rd reversal valve C successively, and the 3rd actuator port B1 communicates with oil return inlet T.At this moment, left oil cylinder 7 and right oil cylinder 8 stretch out synchronously, drive the whole decline of perching knife.
While post-tensioning left handle and right handles
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port a1 of the first reversal valve A by the first actuator port A1, hydraulic fluid port a1 communicates with the afflux hydraulic fluid port g0 of flow divider-combiner G by hydraulic fluid port a3, the oil inlet P of the first reversal valve group communicates with the hydraulic fluid port c1 of the 3rd reversal valve C by the 3rd actuator port B1 simultaneously, hydraulic fluid port c1 communicates with the afflux hydraulic fluid port g0 of flow divider-combiner G by hydraulic fluid port c2, the first shunting hydraulic fluid port g1 communicates with the rod chamber of left oil cylinder 7 by hydraulic fluid port e1 and the e2 of the 5th reversal valve E successively, and the second shunting hydraulic fluid port g2 communicates with the rod chamber of right oil cylinder 8.The rodless cavity of left side oil cylinder 7 communicates with first bleed off circuit 101 of afflux bleed off circuit by hydraulic fluid port f2 and the f1 of the 6th reversal valve F successively, the rodless cavity of right oil cylinder 8 is logical to communicate with second bleed off circuit 102, and the afflux oil circuit 100 hydraulic fluid port d3 of the hydraulic fluid port b3 by the second reversal valve b and hydraulic fluid port b1 and the 4th reversal valve D and hydraulic fluid port d1 respectively communicates with the second actuator port A2 of the first reversal valve group and communicates with the 4th actuator port B2.The second actuator port A2 and the 4th actuator port B2 all communicate with oil return inlet T.At this moment, left oil cylinder 7 and right oil cylinder 8 withdrawal synchronously and withdrawal speed are very fast, drive the whole fast lifting of perching knife.
Push away left handle and right handles simultaneously
The oil inlet P of the first reversal valve group communicates with the hydraulic fluid port b1 of the second reversal valve B by the second actuator port A2, hydraulic fluid port b1 communicates with afflux oil circuit 100 by hydraulic fluid port b3, oil inlet P communicates with the hydraulic fluid port d1 of the 4th reversal valve D by the 4th actuator port B2 simultaneously, hydraulic fluid port d1 communicates with afflux oil circuit 100 by hydraulic fluid port d3, first bleed off circuit 101 communicates with the rodless cavity of left oil cylinder 7 by hydraulic fluid port f1 and the f2 of the 6th reversal valve F successively, and the rodless cavity of second bleed off circuit 102 and right oil cylinder 8 is logical to communicate.The rod chamber of left side oil cylinder 7 communicates with the first shunting hydraulic fluid port g1 by hydraulic fluid port e2 and the e1 of the 5th reversal valve E successively, the rod chamber of right oil cylinder 8 communicates with the second shunting hydraulic fluid port g2, the afflux hydraulic fluid port g0 of flow divider-combiner G communicates with the first actuator port A1 and the 3rd actuator port B1 of the first reversal valve group by the hydraulic fluid port a3 of the first reversal valve A and hydraulic fluid port c3 and the c1 of a1 and the 3rd reversal valve C respectively, and the first actuator port A1 and the 3rd actuator port B1 all communicate with oil return inlet T.At this moment, left oil cylinder 7 and right oil cylinder 8 withdrawal synchronously and withdrawal speed are very fast, drive the whole fast lifting of perching knife.
Above-mentioned control operation step and the results are shown in table 1:
Control operation step and the result of table 1 perching knife lift control system
As shown in the above, the perching knife lift control system that provides of the utility model embodiment has the following advantages:
Stretch out when 1) can realize left and right sides oil cylinder or regain, improve operating efficiency, and control mode is flexible.Further, also can realize being synchronized with the movement of left and right sides oil cylinder by in the second reversal valve group, flow divider-combiner being set, reduce in the work progress smoothing time to perching knife.In addition, carry out machinery control by left and right sides handle, operating personnel can realize above-mentioned functions by independent operation left handle or right handles, thus, left hand or the right hand that on the one hand can liberate the operator are used for controlling steering wheel, the demand of the habitual usefulness of the person hand difference that also can satisfy the different operating on the other hand, can realize that single lever operated left and right sides oil cylinder moves simultaneously, be a cover monolever coordinated control system.
The mode that keeps the left and right sides oil cylinder independently moving when 2) realizing the left and right sides oil cylinder action time, the operator can guarantee the reliability of control system according to concrete operating mode demand switching controls mode at any time.
The utility model embodiment also provides a kind of land leveller, this land leveller is provided with above-mentioned any perching knife lift control system, because above-mentioned any perching knife lift control system has above-mentioned technique effect, therefore, the land leveller that is provided with this perching knife lift control system also should possess corresponding technique effect, its specific implementation process is similar to the above embodiments, does not give unnecessary details now.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. a perching knife lift control system is characterized in that, comprising: hydraulic pump, the first reversal valve group, the second reversal valve group, left oil cylinder and right oil cylinder; Wherein,
The first reversal valve group comprises: oil-in, oil return opening, first actuator port, second actuator port, the 3rd actuator port and the 4th actuator port;
Oil-in and oil return opening communicate with pressure hydraulic fluid port and the fuel tank of hydraulic pump respectively;
First actuator port communicates with the rod chamber of left oil cylinder by second reversal valve group selection ground, or communicate with the rod chamber of left oil cylinder and right oil cylinder simultaneously, second actuator port communicates with the rodless cavity of left oil cylinder by the second reversal valve group accordingly, or communicates with the rodless cavity of left oil cylinder and right oil cylinder simultaneously;
The 3rd actuator port communicates with the rod chamber of right oil cylinder by second reversal valve group selection ground, or communicate with the rod chamber of right oil cylinder and left oil cylinder simultaneously, the 4th actuator port communicates with the rodless cavity of right oil cylinder by the second reversal valve group accordingly, or communicates with the rodless cavity of right oil cylinder and left oil cylinder simultaneously.
2. perching knife lift control system according to claim 1 is characterized in that, the described first reversal valve group has six kinds of duties:
Under first kind of duty, first actuator port communicates with oil-in, and second actuator port communicates with oil return opening;
Under second kind of duty, second actuator port communicates with oil-in, and first actuator port communicates with oil return opening;
Under the third duty, the 3rd actuator port communicates with oil-in, and the 4th actuator port communicates with oil return opening;
Under the 4th kind of duty, the 4th actuator port communicates with oil-in, and the 3rd actuator port communicates with oil return opening;
Under the 5th kind of duty, first actuator port and the 3rd actuator port all communicate with oil-in, and second actuator port and the 4th actuator port all communicate with oil return opening;
Under the 6th kind of duty, second actuator port and the 4th actuator port all communicate with oil-in, and first actuator port and the 3rd actuator port all communicate with oil return opening.
3. perching knife lift control system according to claim 2 is characterized in that, described perching knife lift control system also comprises: with left handle and the right handles that the described first reversal valve group links to each other, left handle and right handles all have two work gears;
When left handle was in the first work gear, the first reversal valve group was in first kind of duty;
When left handle was in the second work gear, the first reversal valve group was in second kind of duty;
When right handles was in the first work gear, the first reversal valve group was in the third duty;
When right handles was in the second work gear, the first reversal valve group was in the 4th kind of duty;
When left handle and right handles all were in the first work gear, the first reversal valve group was in the 5th kind of duty;
When left handle and right handles all were in the second work gear, the first reversal valve group was in the 6th kind of duty.
4. perching knife lift control system according to claim 1 is characterized in that, described hydraulic pump is load sensitive pump.
5. perching knife lift control system according to claim 4 is characterized in that, the described first reversal valve group is the load-sensitive multiple directional control valve.
6. according to any described perching knife lift control system of claim 1 to 5, it is characterized in that the described second reversal valve group comprises: first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 5th reversal valve, the 6th reversal valve and flow divider-combiner;
First actuator port optionally communicates with the rod chamber of left oil cylinder or the afflux hydraulic fluid port of flow divider-combiner by first reversal valve;
The 3rd actuator port optionally communicates with the afflux hydraulic fluid port of flow divider-combiner or the rod chamber of right oil cylinder by the 3rd reversal valve;
The first shunting hydraulic fluid port of flow divider-combiner optionally communicates with the rod chamber of left oil cylinder by the 5th reversal valve or is cut off; The second shunting hydraulic fluid port of flow divider-combiner communicates with the rod chamber of right oil cylinder;
Second actuator port optionally communicates with the rodless cavity of left oil cylinder or the afflux oil circuit of afflux bleed off circuit by second reversal valve;
The 4th actuator port optionally communicates with the afflux oil circuit of afflux bleed off circuit or the rodless cavity of right oil cylinder by the 4th reversal valve;
First bleed off circuit of afflux bleed off circuit optionally communicates with the rodless cavity of left oil cylinder by the 6th reversal valve or is cut off; Second bleed off circuit of afflux bleed off circuit communicates with the rodless cavity of right oil cylinder.
7. perching knife lift control system according to claim 6 is characterized in that, described first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 5th reversal valve, the 6th reversal valve are solenoid operated directional valve;
When first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 5th reversal valve, the 6th reversal valve all when electric, first actuator port communicates with the afflux hydraulic fluid port of flow divider-combiner by first reversal valve, and second actuator port communicates with the afflux oil circuit of afflux bleed off circuit by second reversal valve; The 3rd actuator port communicates with the afflux hydraulic fluid port of flow divider-combiner by the 3rd reversal valve, and the 4th actuator port communicates with the afflux oil circuit of afflux bleed off circuit by the 4th reversal valve; The first shunting hydraulic fluid port of flow divider-combiner communicates with the rod chamber of left oil cylinder by the 5th reversal valve; The second shunting hydraulic fluid port of flow divider-combiner communicates with the rod chamber of right oil cylinder; First bleed off circuit of afflux bleed off circuit communicates with the rodless cavity of left oil cylinder by the 6th reversal valve; Second bleed off circuit of afflux bleed off circuit communicates with the rodless cavity of right oil cylinder;
When first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 5th reversal valve, the equal dead electricity of the 6th reversal valve, first actuator port communicates with the rod chamber of left oil cylinder by first reversal valve, second actuator port communicates with the rodless cavity of left oil cylinder by second reversal valve, the 3rd actuator port communicates with the rod chamber of right oil cylinder by the 3rd reversal valve, and the 4th actuator port communicates with the rodless cavity of right oil cylinder by the 4th reversal valve.
8. perching knife lift control system according to claim 7 is characterized in that, described first reversal valve, second reversal valve, the 3rd reversal valve, the 4th reversal valve are the two-position three way solenoid operated directional valve.
9. perching knife lift control system according to claim 7 is characterized in that, described the 5th reversal valve and the 6th reversal valve are the bi-bit bi-pass solenoid operated directional valve.
10. a land leveller is characterized in that, is provided with any described perching knife lift control system of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220724232 CN203066140U (en) | 2012-12-25 | 2012-12-25 | Land scraper and shovel blade lifting control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220724232 CN203066140U (en) | 2012-12-25 | 2012-12-25 | Land scraper and shovel blade lifting control system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN203066140U true CN203066140U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220724232 Expired - Fee Related CN203066140U (en) | 2012-12-25 | 2012-12-25 | Land scraper and shovel blade lifting control system thereof |
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| CN (1) | CN203066140U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046594A (en) * | 2012-12-25 | 2013-04-17 | 三一重工股份有限公司 | Land leveller and shovel blade lifting control system thereof |
| CN110258686A (en) * | 2019-06-28 | 2019-09-20 | 三一汽车制造有限公司 | Perching knife jacking system, land leveller and control method |
-
2012
- 2012-12-25 CN CN 201220724232 patent/CN203066140U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046594A (en) * | 2012-12-25 | 2013-04-17 | 三一重工股份有限公司 | Land leveller and shovel blade lifting control system thereof |
| CN110258686A (en) * | 2019-06-28 | 2019-09-20 | 三一汽车制造有限公司 | Perching knife jacking system, land leveller and control method |
| CN110258686B (en) * | 2019-06-28 | 2021-11-12 | 三一汽车制造有限公司 | Blade lifting system, grader and control method |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20181225 |