CN102059929B - Hydro-pneumatic suspension system and wheeled vehicle with same - Google Patents
Hydro-pneumatic suspension system and wheeled vehicle with same Download PDFInfo
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- CN102059929B CN102059929B CN2010105976977A CN201010597697A CN102059929B CN 102059929 B CN102059929 B CN 102059929B CN 2010105976977 A CN2010105976977 A CN 2010105976977A CN 201010597697 A CN201010597697 A CN 201010597697A CN 102059929 B CN102059929 B CN 102059929B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/0416—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics regulated by varying the resiliency of hydropneumatic suspensions
- B60G17/0432—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics regulated by varying the resiliency of hydropneumatic suspensions by varying the number of accumulators connected to the hydraulic cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/06—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid
- B60G21/073—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
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Abstract
The invention discloses a hydro-pneumatic suspension system and a wheeled vehicle with the same. The hydro-pneumatic suspension system comprises a left suspension oil cylinder, a right suspension oil cylinder, a left change valve, a right change valve, a first hydraulic locking structure and a second hydraulic locking structure. The left suspension oil cylinder and the right suspension oil cylinder are respectively provided with a rod cavity and a rodless cavity. The left change valve and the right change valve are three-position four-way valves and are respectively provided with a first oil opening and a second oil opening, a pressure oil opening connected with a pressure oil source and an oil return opening connected with an oil tank. The first hydraulic locking structure is connected between the left suspension oil cylinder and the left change valve. The second hydraulic locking structure is connected between the right suspension oil cylinder and the right change valve. The left change valve and the right change valve are respectively provided with a first state, a second state and a third state, wherein the first state enables the first working oil opening and the second working oil opening to be connected to the oil return opening; the second state enables the first working oil opening to be connected to the oil return opening and the second working oil opening to be connected to the pressure oil opening; the third state enables the first working oil opening to be connected to the pressure oil opening and the second working oil opening to be connected to the oil return opening. In the invention, the hydro-pneumatic suspension system and the wheeled vehicle can realize the active lifting of vehicle axles under the nonload bearing state.
Description
Technical field
The present invention relates to a kind of oleo-pneumatic suspension system of wheeled car, and relate to wheeled car with this oleo-pneumatic suspension system.The present invention is particularly useful for the coefficient multiaxis wheeled car of at least one pair of hanging oil cylinder.
Background technology
Oleo-pneumatic suspension is the suspension gear that integrates elastic element and shock absorber, has overcome the lineament of steel spring, is applied to engineering truck, has favorable damping performance, ride comfort and vehicle run stability, and can realize the adjustability of bodywork height.In the existing wheeled car oil-gas suspension technology scheme, existing freestanding oleo-pneumatic suspension the oleo-pneumatic suspension of communication type is also arranged, and both respectively has its merits and faults.Such as general free-standing oleo-pneumatic suspension, the general communication type oleo-pneumatic suspension that adopts on the hoisting crane of full ground of adopting on the self-unloading load wagon.Freestanding oleo-pneumatic suspension turning efficiency is better, and ride comfort is relatively poor; And communication type oleo-pneumatic suspension ride comfort is better, and turning efficiency is relatively poor; When deadlight load very greatly also slowly went, oleo-pneumatic suspension needed the rigidity blocking function; During through culvert or obstacle, oleo-pneumatic suspension needs overall height adjustment function to improve carrying capacity.Therefore need the perfect oleo-pneumatic suspension system of design one cover, realize that multiple mode of suspension is to adapt to different road demands.
Chinese invention patent application notification number CN101618669 (number of patent application: 200810125285.6; The applying date: on June 30th, 2008) disclosed a kind of hydro pneumatic suspension control loop; It adopts the rodless cavity of two position two-way valve control homonymy suspension oil cylinder and the connected relation of energy storage, to realize the rigid and flexible conversion of suspension system.The rod chamber of each suspension oil cylinder is communicated with the energy storage of its opposite side, to obtain bigger roll rate.Adopt the connected relation between two position two-way valve difference control presssure oil circuit and oil return circuit and the suspension oil cylinder rodless cavity, to realize the up-down control of vehicle body.The vehicle body that this hydro pneumatic suspension can be implemented under the load-bearing state goes up and down to control, and can realize flexibility and the rigid suspended support under the road driving pattern.
Yet in this oil-gas suspension technology, hanging oil cylinder is connected with energy storage, and fluid gets into energy storage during through hanging oil cylinder rising vehicle body.This existing oleo-pneumatic suspension control loop must make the passive withdrawal of hanging oil cylinder through car weight, can not realize that at the non-bearing state active of vehicle bridge is gone up and down.In addition, the road driving pattern of this oil-gas suspension technology is less, can not satisfy the requirement of the road conditions of various complicacies.
Summary of the invention
A technical matters to be solved by this invention provides and a kind ofly can realize oleo-pneumatic suspension system that vehicle bridge is initiatively gone up and down and the wheeled car with this system at the non-bearing state.
Another technical matters that the present invention need solve provides a kind of oil gas suspended device that can adapt to different road condition demands, the ride comfort when this device is used to improve vehicle ', and stability and through performance satisfy multiple road condition demand.
For solving above-mentioned at least one technical matters, according to an aspect of the present invention, a kind of oleo-pneumatic suspension system is provided; Comprise: left hanging oil cylinder and right hanging oil cylinder, have rod chamber and rodless cavity respectively, it is characterized in that; The oleo-pneumatic suspension system also comprises: left change-over valve and right change-over valve; Be three-position four-way valve, have first actuator port respectively, first actuator port of left change-over valve and right change-over valve is connected respectively to the rod chamber loop of left hanging oil cylinder and right hanging oil cylinder; Second actuator port, second actuator port of left change-over valve and right change-over valve is connected respectively to the rodless cavity loop of left hanging oil cylinder and right hanging oil cylinder; The pressure hydraulic fluid port is with the pressure oil-source bonded assembly; And return opening, being connected with fuel tank, the first hydraulic lock structure is connected between left hanging oil cylinder and the left change-over valve; The second hydraulic lock structure is connected between right hanging oil cylinder and the right change-over valve, and wherein, left change-over valve and right change-over valve have respectively makes first actuator port and second actuator port all be connected to first state of return opening; Make first actuator port be connected to return opening and make second actuator port be connected to second state of pressure hydraulic fluid port; And make first actuator port be connected to the pressure hydraulic fluid port and make second actuator port be connected to the third state of return opening.
Further; The first hydraulic lock structure comprises first hydraulic control one-way valve and second hydraulic control one-way valve; The rod chamber oil circuit of first hydraulic control one-way valve through left hanging oil cylinder is connected between first actuator port of rod chamber and left change-over valve of left hanging oil cylinder, and the rodless cavity oil circuit of second hydraulic control one-way valve through left hanging oil cylinder is connected between second actuator port of rodless cavity and left change-over valve of left hanging oil cylinder; The second hydraulic lock structure comprises the 3rd hydraulic control one-way valve and the 4th hydraulic control one-way valve; Wherein the rod chamber oil circuit of the 3rd hydraulic control one-way valve through right hanging oil cylinder is connected between first actuator port of rod chamber and right change-over valve of right hanging oil cylinder, and the rodless cavity oil circuit of the 4th hydraulic control one-way valve through right hanging oil cylinder is connected between second actuator port of rodless cavity and right change-over valve of right hanging oil cylinder.
Further, the hydraulic control port of first hydraulic control one-way valve is connected to second actuator port of left change-over valve, and the hydraulic control port of second hydraulic control one-way valve is connected to first actuator port of left change-over valve; The hydraulic control port of the 3rd hydraulic control one-way valve is connected to second actuator port of right change-over valve, and the hydraulic control port of the 4th hydraulic control one-way valve is connected to first actuator port of right change-over valve.
Further, the oleo-pneumatic suspension system also comprises: first on-off valve, first end are connected through first node on the rodless cavity oil circuit of left hanging oil cylinder, and second end is connected on the rod chamber oil circuit of right hanging oil cylinder through Section Point; Second on-off valve, first end are connected through the 3rd node on the rod chamber oil circuit of left hanging oil cylinder, and second end is connected on the rodless cavity oil circuit of right hanging oil cylinder through the 4th node.
Further, the oleo-pneumatic suspension system also comprises: the 3rd on-off valve is connected between the rod chamber oil circuit and rodless cavity oil circuit of left hanging oil cylinder; The 4th on-off valve is connected between the rod chamber oil circuit and rodless cavity oil circuit of right hanging oil cylinder.
Further, the oleo-pneumatic suspension system also comprises: left energy storage is connected through the 5th node on the rodless cavity oil circuit of left hanging oil cylinder; Right energy storage is connected on the rodless cavity oil circuit of right hanging oil cylinder through the 6th node.
Further, the oleo-pneumatic suspension system also comprises: the 5th on-off valve is connected between left energy storage and the 5th node; The 6th on-off valve is connected between right energy storage and the 6th node.
Further, the oleo-pneumatic suspension system also comprises: control unit is connected with right change-over valve with left change-over valve, to control the operation of left change-over valve and right change-over valve.
Further, control unit also is connected with first on-off valve, second on-off valve, the 3rd on-off valve, the 4th on-off valve, the 5th on-off valve and the 6th on-off valve, to send corresponding break-make control command.
Further, the oleo-pneumatic suspension system also comprises: the primary importance sensor, be arranged on the left hanging oil cylinder, and be used to detect the current location of left hanging oil cylinder; Second place sensor; Be arranged on the right hanging oil cylinder; Be used to detect the current location of right hanging oil cylinder; Control unit sends the control corresponding instruction based on from the position signal of the relevant left hanging oil cylinder of primary importance sensor and position signal from the relevant right hanging oil cylinder of second place sensor.
Further, control unit all is in the selection of control oleo-pneumatic suspension system execution road driving pattern under first state at left change-over valve and right change-over valve.
Further, the road driving pattern comprises: intersection connection pattern, and wherein, first on-off valve, second on-off valve, the 5th on-off valve and the 6th on-off valve are in on-state, and the 3rd on-off valve and the 4th on-off valve are in off-state simultaneously; One-sided separate connection pattern, wherein, the 3rd on-off valve, the 4th on-off valve, the 5th on-off valve and the 6th on-off valve are in on-state, and first on-off valve and second on-off valve are in off-state simultaneously; Be communicated with pattern fully, wherein, first on-off valve, second on-off valve, the 3rd on-off valve, the 4th on-off valve, the 5th on-off valve and the 6th on-off valve all are in on-state; And the locking pattern, wherein, first on-off valve, second on-off valve, the 3rd on-off valve, the 4th on-off valve, the 5th on-off valve and the 6th on-off valve all are in off-state.
Further, in this oleo-pneumatic suspension system, left hanging oil cylinder and right hanging oil cylinder comprise a plurality of hanging oil cylinder of install in parallel respectively.
According to a further aspect in the invention, a kind of wheeled car is provided, has it is characterized in that, comprised among the claim 1-12 each described oleo-pneumatic suspension system.
The present invention has following beneficial effect:
1, adopt two three position four-way directional control valves respectively with being connected of left hanging oil cylinder and right hanging oil cylinder; Through the position of control change-over valve, can realize that vehicle bridge initiatively promotes, rather than make the passive withdrawal of oil cylinder through car weight; Like this; Can after hoisting crane is accomplished fluently supporting leg, vehicle bridge be mentioned, improve the chassis maintainability through oil pressure.
2, left and right hanging oil cylinder can realize the up-down controllable function of side-by-side mounting oil cylinder through corresponding change-over valve and displacement pickup, thereby realizes the adjustment of car body attitude; Left and right hanging oil cylinder both can be carried out one-sided separate connection, also can intersect connection, can also connect fully, simultaneously, through cutting off energy storage and realizing the locking of left and right hanging oil cylinder rigidity being connected of oil cylinder.Therefore, can realize at least four kinds of road driving patterns.Like this, the present invention adopts a plurality of on-off valves can realize respectively that intersection is communicated with, and is communicated with fully, and one-sided separate connection also has four kinds of road driving patterns of rigidity locking, thereby has improved the road adaptive capacity.
3, adopt hydraulic control one-way valve and on-off valve, help realizing system's no leak.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the hydraulic schematic diagram of the oleo-pneumatic suspension system of first embodiment of the invention, shows a kind of hydraulic principle of single bridge suspension.
Fig. 2 is the hydraulic schematic diagram of the oleo-pneumatic suspension system of second embodiment of the invention, and the hydraulic principle that shows a kind of two bridges suspension is implemented scheme drawing.
Fig. 3 (a), Fig. 3 (b), Fig. 3 (c), Fig. 3 (d) are the rough schematic view of four kinds of mode of suspension of second embodiment of the invention; Show respectively intersect the connection pattern, be communicated with the coupled condition of pattern, one-sided separate connection pattern and rigidity locking pattern fully, it also is suitable for first embodiment.
Among the figure, 1. left change-over valve, 2. right change-over valve, 3. first hydraulic control one-way valve, 4. second hydraulic control one-way valve; 5. the 3rd hydraulic control one-way valve, 6. the 4th hydraulic control one-way valve, 7. first on-off valve, 8. second on-off valve, 9. the 3rd on-off valve; 10. the 4th on-off valve, 11. left hanging oil cylinder, 12. right hanging oil cylinder, 13. primary importance sensors, 14. second place sensors; 15. the 5th on-off valve, 16. the 6th on-off valves, 17. left energy storages, 18. right energy storages.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As shown in Figure 1; For the hydraulic principle of single bridge suspension is implemented scheme drawing; A kind of oil gas suspended device that is used for wheeled car that present embodiment provides comprises left change-over valve 1, right change-over valve 2, the first hydraulic control one-way valves 3, second hydraulic control one-way valve 4, the 3rd hydraulic control one-way valve 5, the 4th hydraulic control one-way valve 6; First on-off valve 7, second on-off valve 8, the 3rd on-off valve 9, the 4th on-off valve 10, the 5th on-off valve 15, the 6th on-off valve 16; A left side hanging oil cylinder 11, right hanging oil cylinder 12, left energy storage 17, right energy storage 18, and each oil circuit connects to form.First displacement pickup 13, second displacement pickup 14 are housed on described hanging oil cylinder, are used to detect the hanging oil cylinder current location.
Left side hanging oil cylinder 11 has rod chamber and rodless cavity respectively with right hanging oil cylinder 12; Left side change-over valve 1 is three-position four-way valve with right change-over valve 2, have respectively first actuator port, second hydraulic fluid port, with pressure oil-source bonded assembly pressure hydraulic fluid port and with fuel tank bonded assembly return opening; First hydraulic control one-way valve 3 and second hydraulic control one-way valve 4 form the first hydraulic lock structure; Wherein the rod chamber oil circuit of first hydraulic control one-way valve 3 through left hanging oil cylinder 11 is connected between first actuator port of rod chamber and left change-over valve 1 of left hanging oil cylinder 11, and the rodless cavity oil circuit of second hydraulic control one-way valve 4 through left hanging oil cylinder 11 is connected between second actuator port of rodless cavity and left change-over valve 1 of left hanging oil cylinder 11; The 3rd hydraulic control one-way valve 5 and the 4th hydraulic control one-way valve 6; Form the second hydraulic lock structure; Wherein the rod chamber oil circuit of the 3rd hydraulic control one-way valve 5 through right hanging oil cylinder 12 is connected between first actuator port of rod chamber and right change-over valve 2 of right hanging oil cylinder 12; The rodless cavity oil circuit of the 4th hydraulic control one-way valve 6 through right hanging oil cylinder 12 is connected between second actuator port of rodless cavity and right change-over valve 2 of right hanging oil cylinder 12; Wherein, left change-over valve 1 has respectively with right change-over valve 2 and makes first actuator port and second actuator port all be connected to first state of return opening; Make first actuator port be connected to return opening and make second actuator port be connected to second state of pressure hydraulic fluid port; And make first actuator port be connected to the pressure hydraulic fluid port and make second actuator port be connected to the third state of return opening.
The hydraulic control port of first hydraulic control one-way valve 3 is connected to second actuator port of left change-over valve 1, and the hydraulic control port of second hydraulic control one-way valve 4 is connected to first actuator port of left change-over valve 1; The hydraulic control port of the 3rd hydraulic control one-way valve 5 is connected to second actuator port of right change-over valve 2, and the hydraulic control port of the 4th hydraulic control one-way valve 6 is connected to first actuator port of right change-over valve 1.
Left side change-over valve 1 is used for the position control of left hanging oil cylinder 11, thereby realizes the adjustment to left side overall height, and first hydraulic control one-way valve 3 and second hydraulic control one-way valve 4 are used for the maintenance of left hanging oil cylinder 11 positions and prevent 11 liang of chamber hydraulic fluid leaks of left hanging oil cylinder.
Like this, adopt two three position four-way directional control valves to combine hydraulic control one-way valve, can realize the flexible independent control of one-sided oil cylinder, can after hoisting crane is accomplished fluently supporting leg, vehicle bridge be mentioned, improve the chassis maintainability through oil pressure.The hydraulic control one-way valve here works the system leak effect that prevents.
Left side change-over valve 1 is under first state, and left change-over valve 1 spool is in meta, and the change-over valve actuator port is communicated with oil return T mouth, and left hanging oil cylinder 11 is in the position hold mode under first hydraulic control one-way valve 3 and 4 effects of second hydraulic control one-way valve; Under second state; Left side change-over valve 1 spool is in position, a left side, and P mouth fluid arrives left hanging oil cylinder 11 rodless cavities through the left change-over valve 1 and second hydraulic control one-way valve 4; Second hydraulic control one-way valve, 4 import oil pressure are opened first hydraulic control one-way valve 3 simultaneously; Left side hanging oil cylinder 11 rod chambers are realized oil return through first hydraulic control one-way valve 3 and left change-over valve 1, thereby left hanging oil cylinder 11 is stretched out, so left side height of the carbody raises; Under the third state; Left side change-over valve 1 spool is in right position, and P mouth fluid arrives left hanging oil cylinder 11 rod chambers through the left change-over valve 1 and first hydraulic control one-way valve 3; First hydraulic control one-way valve, 3 import oil pressure are opened second hydraulic control one-way valve 3 simultaneously; Left side hanging oil cylinder 11 rodless cavities are realized oil return through second hydraulic control one-way valve 3 and left change-over valve 1, thereby make left hanging oil cylinder 11 withdrawals, so left side height of the carbody reduces.
Right change-over valve 2 is used for the position control of left hanging oil cylinder 12, thereby realizes the adjustment to the right overall height, and the 3rd hydraulic control one-way valve 5 and the 4th hydraulic control one-way valve 6 are used for the maintenance of right hanging oil cylinder 12 positions and prevent 12 liang of chamber hydraulic fluid leaks of left hanging oil cylinder.
Right change-over valve 2 is under first state, and right change-over valve 2 spools are in meta, and the change-over valve actuator port is communicated with oil return T mouth, and left hanging oil cylinder 12 is in the position hold mode under the 3rd hydraulic control one- way valve 5 and 6 effects of the 4th hydraulic control one-way valve; Under second state; Right change-over valve 2 spools are in position, a left side, and P mouth fluid arrives right hanging oil cylinder 12 rodless cavities through right change-over valve 2 and the 4th hydraulic control one-way valve 6; The 4th hydraulic control one-way valve 6 import oil pressure are opened the 3rd hydraulic control one-way valve 5 simultaneously; Right hanging oil cylinder 12 rod chambers are realized oil return through the 3rd hydraulic control one-way valve 5 and right change-over valve 2, thereby left hanging oil cylinder 12 is stretched out, and therefore the right height of the carbody raises; Under the third state; Right change-over valve 2 spools are in right position, and P mouth fluid arrives right hanging oil cylinder 12 rod chambers through right change-over valve 2 and the 3rd hydraulic control one-way valve 5; The 3rd hydraulic control one-way valve 5 import oil pressure are opened the 4th hydraulic control one-way valve 6 simultaneously; Right hanging oil cylinder 12 rodless cavities are realized oil return through the 4th hydraulic control one-way valve 6 and right change-over valve 2, thereby make right hanging oil cylinder 12 withdrawals, and therefore the right height of the carbody reduces.
Described first displacement pickup 13; Be used for left suspension cylinder 11 position probing; Described second displacement pickup 14; Be used for right hanging oil cylinder 12 position probing, through the position signal that detects left change-over valve 1 controlled with right change-over valve 2, thereby realized control and adjustment height of the carbody and attitude.
Adopt above-mentioned overall height adjustment scheme advantage to be: under different road conditions, left and right overall height can realize independent fully adjustment, thereby improves through performance, as through culvert the time, reduces overall height; Through the gully time, increase overall height.In addition; In the vehicle that has vertical leg to support (like full ground hoisting crane); When can vertical leg supporting car body, initiatively promote vehicle bridge (rather than through the passive realization of car weight compression hanging oil cylinder) through described left change-over valve 1 and right change-over valve 2, thereby improve the vehicle chassis maintainability; Adopt first hydraulic control one-way valve 3, second hydraulic control one-way valve 4, the 3rd hydraulic control one-way valve 5, the 4th hydraulic control one-way valve 6, guarantee system's no leak.
Vehicle is under driving cycle, and described left change-over valve 1 all is under first state with right change-over valve 2.Under this state, described first on-off valve 7, second on-off valve 8, the 3rd on-off valve 9, the 4th on-off valve 10, the 5th on-off valve 15, the 6th on-off valve 16 according to different road condition demands, can be realized at least four kinds of road driving patterns.
First end of first on-off valve 7 is connected through first node N1 on the rodless cavity oil circuit of left hanging oil cylinder 11, and second end is connected on the rod chamber oil circuit of right hanging oil cylinder 12 through Section Point N2; First end of second on-off valve 8 is connected through the 3rd node N3 on the rod chamber oil circuit of left hanging oil cylinder 11, and second end is connected on the rodless cavity oil circuit of right hanging oil cylinder 12 through the 4th node N2.The 3rd on-off valve 9 is connected between the rod chamber oil circuit and rodless cavity oil circuit of left hanging oil cylinder 11; The 4th on-off valve 10 is connected between the rod chamber oil circuit and rodless cavity oil circuit of right hanging oil cylinder 12.Left side energy storage 17 is connected through the 5th node N5 on the rodless cavity oil circuit of left hanging oil cylinder 11; Right energy storage 18 is connected on the rodless cavity oil circuit of right hanging oil cylinder 12 through the 6th node N6.The 5th on-off valve 15 is connected between left energy storage 17 and the 5th node N5; The 6th on-off valve 16 is connected between right energy storage 18 and the 6th node N6.
Under first kind of road driving pattern shown in Fig. 3 (a), described first on-off valve 7, second on-off valve 8, the 5th on-off valve 15, the 6th on-off valve 16 are in on-state, and simultaneously described the 3rd on-off valve 9, the 4th on-off valve 10 are in off-state.At this moment, left hanging oil cylinder 11 rodless cavities are communicated with left energy storage 17 through the 5th on-off valve 15, and left hanging oil cylinder 11 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers through first on-off valve 7 simultaneously; Right hanging oil cylinder 12 rodless cavities are communicated with right energy storage 18 through the 6th on-off valve 16, and right hanging oil cylinder 12 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers through second on-off valve 8 simultaneously.Thus, realize that left hanging oil cylinder 11 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers and left energy storage 17, simultaneously, right hanging oil cylinder 12 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers and right energy storage 18.This pattern is for intersecting the connection pattern.
Under second kind of road driving pattern shown in Fig. 3 (b), described the 3rd on-off valve 9, the 4th on-off valve 10, the 5th on-off valve 15, the 6th on-off valve 16 are in on-state, and simultaneously described first on-off valve 7, second on-off valve 8 are in off-state.At this moment, left hanging oil cylinder 11 rodless cavities are communicated with left energy storage 17 through the 5th on-off valve 15, and left hanging oil cylinder 11 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers through the 3rd on-off valve 9 simultaneously; Right hanging oil cylinder 12 rodless cavities are communicated with right energy storage 18 through the 6th on-off valve 16, and right hanging oil cylinder 12 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers through the 4th on-off valve 10 simultaneously.Thus, realize that left hanging oil cylinder 11 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers and left energy storage 17, simultaneously, right hanging oil cylinder 12 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers and right energy storage 18.This pattern is one-sided separate connection pattern.
Under the third road driving pattern shown in Fig. 3 (c), described first on-off valve 7, second on-off valve 8, the 3rd on-off valve 9, the 4th on-off valve 10, the 5th on-off valve 15, the 6th on-off valve 16 all are in on-state.At this moment; Left side hanging oil cylinder 11 rodless cavities are communicated with left energy storage 17 through the 5th on-off valve 15; Left side hanging oil cylinder 11 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers through the 3rd on-off valve 9, and left hanging oil cylinder 11 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers through first on-off valve 7 simultaneously; Right hanging oil cylinder 12 rodless cavities are communicated with right energy storage 18 through the 6th on-off valve 16; Right hanging oil cylinder 12 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers through the 4th on-off valve 10; Simultaneously, right hanging oil cylinder 12 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers through second on-off valve 8.Thus, realize that left hanging oil cylinder 11 rodless cavities and rod chamber and right hanging oil cylinder 12 rodless cavities and rod chamber and left energy storage 17, right energy storage 18 are communicated with fully.This pattern is for be communicated with pattern fully.
Under the 4th kind of road driving pattern shown in Fig. 3 (d), described first on-off valve 7, second on-off valve 8, the 3rd on-off valve 9, the 4th on-off valve 10, the 5th on-off valve 15, the 6th on-off valve 16 all are in off-state.At this moment, left hanging oil cylinder 11 rodless cavities and rod chamber, and right hanging oil cylinder 12 rodless cavities and rod chamber all be in closed state, and all break off with left energy storage 17 and right energy storage 18.This pattern is the locking pattern.
Under above-mentioned four kinds of patterns; Said first hydraulic control one-way valve 3, second hydraulic control one-way valve 4, the 3rd hydraulic control one-way valve 5, the 4th hydraulic control one-way valve 6 separate fluid and the fuel tank in left hanging oil cylinder 11, right hanging oil cylinder 12, left energy storage 17, right energy storage 18 and the pipeline, prevent hydraulic fluid leak.
Adopt the such scheme advantage to be, the ride comfort when this oil gas suspended device can improve vehicle ' better, stability and through performance satisfy multiple road condition demand.Left and right hanging oil cylinder can realize the up-down controllable function of side-by-side mounting oil cylinder through corresponding change-over valve and displacement pickup, thereby realizes the adjustment of car body attitude; Left and right hanging oil cylinder both can be carried out one-sided separate connection, also can intersect connection, can also connect fully, simultaneously, through cutting off energy storage and realizing the locking of left and right hanging oil cylinder rigidity being connected of oil cylinder.Therefore, can realize at least four kinds of road driving patterns.Can realize at least four kinds of road driving patterns through switching, thereby improve the road vehicle comformability; In many axle suspensions, can take all factors into consideration the employing different mode, obtain different flying characteristics.
Fig. 2 shows the hydraulic schematic diagram of second embodiment, is based on the twin shaft oil gas suspension hydraulic principle that two pairs of oil cylinders act on respectively.In this embodiment, comprise two left hanging oil cylinder 11 and 19, two right hanging oil cylinder 12 and 20.Two left hanging oil cylinder and two right hanging oil cylinder difference install in parallels, rod chamber communicates with each other between the hanging oil cylinder of install in parallel, and rodless cavity communicates with each other.The hydraulic principle of this multiaxis oil cylinder and mode of operation and aforementioned first embodiment are basic identical, repeat no more at this.For other multiple-axle vehicle more than the diaxon, its enforcement principle and this second embodiment are identical, therefore all within this patent protection domain.
Above-mentioned oleo-pneumatic suspension system is installed on the vehicle bridge of wheeled car of the present invention, can realizes aforementioned various flying characteristics of the present invention and road driving pattern.Wheeled car can be various construction machinery and equipments, for example hoisting crane etc.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. oleo-pneumatic suspension system comprises:
Left side hanging oil cylinder (11) and right hanging oil cylinder (12) have rod chamber and rodless cavity respectively,
It is characterized in that said oleo-pneumatic suspension system also comprises:
Left side change-over valve (1) and right change-over valve (2) are three-position four-way valve, have respectively:
First actuator port, first actuator port of said left change-over valve (1) is connected to the rod chamber loop of said left hanging oil cylinder (11), and first actuator port of said right change-over valve (2) is connected to the rod chamber loop of said right hanging oil cylinder (12);
Second actuator port, second actuator port of said left change-over valve (1) is connected to the rodless cavity loop of said left hanging oil cylinder (11), and second actuator port of said right change-over valve (2) is connected to the rodless cavity loop of said right hanging oil cylinder (12);
The pressure hydraulic fluid port is connected with pressure oil-source; And
Return opening is connected with fuel tank,
The first hydraulic lock structure is connected between said left hanging oil cylinder (11) and the said left change-over valve (1);
The second hydraulic lock structure is connected between said right hanging oil cylinder (12) and the said right change-over valve (2),
Wherein, said left change-over valve (1) and right change-over valve (2) have respectively and make first actuator port and second actuator port all be connected to first state of return opening; Make first actuator port be connected to return opening and make second actuator port be connected to second state of pressure hydraulic fluid port; And make first actuator port be connected to the pressure hydraulic fluid port and make second actuator port be connected to the third state of return opening.
2. oleo-pneumatic suspension according to claim 1 system is characterized in that:
The said first hydraulic lock structure comprises first hydraulic control one-way valve (3) and second hydraulic control one-way valve (4); The rod chamber oil circuit of wherein said first hydraulic control one-way valve (3) through said left hanging oil cylinder (11) is connected between first actuator port of rod chamber and said left change-over valve (1) of said left hanging oil cylinder (11), and the rodless cavity oil circuit of said second hydraulic control one-way valve (4) through said left hanging oil cylinder (11) is connected between second actuator port of rodless cavity and said left change-over valve (1) of said left hanging oil cylinder (11);
The said second hydraulic lock structure comprises the 3rd hydraulic control one-way valve (5) and the 4th hydraulic control one-way valve (6); The rod chamber oil circuit of wherein said the 3rd hydraulic control one-way valve (5) through said right hanging oil cylinder (12) is connected between first actuator port of rod chamber and said right change-over valve (2) of said right hanging oil cylinder (12), and the rodless cavity oil circuit of said the 4th hydraulic control one-way valve (6) through said right hanging oil cylinder (12) is connected between second actuator port of rodless cavity and said right change-over valve (2) of said right hanging oil cylinder (12).
3. oleo-pneumatic suspension according to claim 2 system is characterized in that:
The hydraulic control port of said first hydraulic control one-way valve (3) is connected to second actuator port of said left change-over valve (1), and the hydraulic control port of said second hydraulic control one-way valve (4) is connected to first actuator port of said left change-over valve (1);
The hydraulic control port of said the 3rd hydraulic control one-way valve (5) is connected to second actuator port of said right change-over valve (2), and the hydraulic control port of said the 4th hydraulic control one-way valve (6) is connected to first actuator port of said right change-over valve (1).
4. oleo-pneumatic suspension according to claim 2 system is characterized in that: also comprise:
First on-off valve (7), first end are connected through first node (N1) on the rodless cavity oil circuit of said left hanging oil cylinder (11), and second end is connected on the rod chamber oil circuit of said right hanging oil cylinder (12) through Section Point (N2);
Second on-off valve (8), first end are connected through the 3rd node (N3) on the rod chamber oil circuit of said left hanging oil cylinder (11), and second end is connected on the rodless cavity oil circuit of said right hanging oil cylinder (12) through the 4th node (N4).
5. oleo-pneumatic suspension according to claim 4 system is characterized in that: also comprise:
The 3rd on-off valve (9) is connected between the rod chamber oil circuit and rodless cavity oil circuit of said left hanging oil cylinder (11);
The 4th on-off valve (10) is connected between the rod chamber oil circuit and rodless cavity oil circuit of said right hanging oil cylinder (12).
6. oleo-pneumatic suspension according to claim 5 system is characterized in that: also comprise:
Left side energy storage (17) is connected through the 5th node (N5) on the rodless cavity oil circuit of said left hanging oil cylinder (11);
Right energy storage (18) is connected on the rodless cavity oil circuit of said right hanging oil cylinder (12) through the 6th node (N6).
7. oleo-pneumatic suspension according to claim 6 system is characterized in that: also comprise:
The 5th on-off valve (15) is connected between said left energy storage (17) and the 5th node (N5);
The 6th on-off valve (16) is connected between said right energy storage (18) and the 6th node (N6).
8. oleo-pneumatic suspension according to claim 7 system is characterized in that: also comprise:
Control unit is connected with right change-over valve (2) with said left change-over valve (1), to control the operation of said left change-over valve (1) and right change-over valve (2).
9. oleo-pneumatic suspension according to claim 8 system is characterized in that:
Said control unit also is connected with said first on-off valve (7), second on-off valve (8), the 3rd on-off valve (9), the 4th on-off valve (10), the 5th on-off valve (15) and the 6th on-off valve (16), to send corresponding break-make control command.
10. it is characterized in that: also comprise according to Claim 8 or 9 described oleo-pneumatic suspension systems:
Primary importance sensor (13) is arranged on the said left hanging oil cylinder (11), is used to detect the current location of said left hanging oil cylinder (11);
Second place sensor (14) is arranged on the said right hanging oil cylinder (12), is used to detect the current location of said right hanging oil cylinder (12),
Said control unit sends the control corresponding instruction based on from the position signal of the relevant said left hanging oil cylinder (11) of said primary importance sensor (13) and position signal from the relevant said right hanging oil cylinder (11) of said second place sensor (14).
11. oleo-pneumatic suspension according to claim 8 system is characterized in that:
Said control unit all is in the selection of the said oleo-pneumatic suspension of control system execution road driving pattern under said first state at said left change-over valve (1) and right change-over valve (2).
12. oleo-pneumatic suspension according to claim 11 system is characterized in that:
Said road driving pattern comprises:
Intersection connection pattern, wherein, said first on-off valve (7), second on-off valve (8), the 5th on-off valve (15) and the 6th on-off valve (16) are in on-state, and said the 3rd on-off valve (9) and the 4th on-off valve (10) are in off-state simultaneously;
One-sided separate connection pattern, wherein, said the 3rd on-off valve (9), the 4th on-off valve (10), the 5th on-off valve (15) and the 6th on-off valve (16) are in on-state, and said first on-off valve (7) and second on-off valve (8) are in off-state simultaneously;
Be communicated with pattern fully, wherein, said first on-off valve (7), second on-off valve (8), the 3rd on-off valve (9), the 4th on-off valve (10), the 5th on-off valve (15) and the 6th on-off valve (16) all are in on-state; And
The locking pattern, wherein, said first on-off valve (7), second on-off valve (8), the 3rd on-off valve (9), the 4th on-off valve (10), the 5th on-off valve (15) and the 6th on-off valve (16) all are in off-state.
13., it is characterized in that according to each described oleo-pneumatic suspension system among the claim 1-9:
Said left hanging oil cylinder (11) and right hanging oil cylinder (12) comprise a plurality of hanging oil cylinder of install in parallel respectively.
14. a wheeled car is characterized in that, comprises among the claim 1-13 each described oleo-pneumatic suspension system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105976977A CN102059929B (en) | 2010-12-20 | 2010-12-20 | Hydro-pneumatic suspension system and wheeled vehicle with same |
| PCT/CN2011/076378 WO2012083663A1 (en) | 2010-12-20 | 2011-06-27 | Hydro-pneumatic suspension system and wheeled vehicle with the system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105976977A CN102059929B (en) | 2010-12-20 | 2010-12-20 | Hydro-pneumatic suspension system and wheeled vehicle with same |
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| Publication Number | Publication Date |
|---|---|
| CN102059929A CN102059929A (en) | 2011-05-18 |
| CN102059929B true CN102059929B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105976977A Active CN102059929B (en) | 2010-12-20 | 2010-12-20 | Hydro-pneumatic suspension system and wheeled vehicle with same |
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| Country | Link |
|---|---|
| CN (1) | CN102059929B (en) |
| WO (1) | WO2012083663A1 (en) |
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| WO2012083663A1 (en) | 2012-06-28 |
| CN102059929A (en) | 2011-05-18 |
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Effective date of registration: 20150618 Address after: 102206 No. 8 North Qing Road, Beijing, Changping District Patentee after: Sanyi Heavy Industry Co., Ltd. Address before: 410600 Changsha, Jinzhou District, Jinzhou City, New Zealand, West Avenue, No. 168 Patentee before: Sany Mobile Cranes Co., Ltd. |