Summary of the invention
A technical matters to be solved by this invention provides and a kind ofly can realize vehicle bridge initiatively the oleo-pneumatic suspension system of lifting 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 by left hanging oil cylinder is connected between first actuator port of the rod chamber of left hanging oil cylinder and left change-over valve, and the rodless cavity oil circuit of second hydraulic control one-way valve by left hanging oil cylinder is connected between second actuator port of the rodless cavity of left hanging oil cylinder and left change-over valve; 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 by right hanging oil cylinder is connected between first actuator port of the rod chamber of right hanging oil cylinder and right change-over valve, and the rodless cavity oil circuit of the 4th hydraulic control one-way valve by right hanging oil cylinder is connected between second actuator port of the rodless cavity of right hanging oil cylinder and right change-over valve.
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 by 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 by Section Point; Second on-off valve, first end are connected by 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 by 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 by 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 by 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, provide a kind of wheeled car, 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, position by the control change-over valve, can realize that vehicle bridge initiatively promotes, rather than make the passive withdrawal of oil cylinder by car weight, like this, can after hoisting crane is accomplished fluently supporting leg, vehicle bridge be mentioned, improve the chassis maintainability by oil pressure.
2, left and right hanging oil cylinder can realize the lifting controllable function of side-by-side mounting oil cylinder by 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, by 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 purpose described above, feature and advantage, the present invention also has other purpose, feature and advantage.With reference to figure, the present invention is further detailed explanation below.
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 that single bridge hangs is implemented scheme drawing, a kind of oil gas suspended device that is used for wheeled car that present embodiment provides, comprise left change-over valve 1, right change-over valve 2, 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, 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, left side hanging oil cylinder 11, right hanging oil cylinder 12, left side 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 and right hanging oil cylinder 12 have rod chamber and rodless cavity respectively, a left side change-over valve 1 and right change-over valve 2 are three-position four-way valve, 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 by left hanging oil cylinder 11 is connected between first actuator port of the rod chamber of left hanging oil cylinder 11 and left change-over valve 1, and the rodless cavity oil circuit of second hydraulic control one-way valve 4 by left hanging oil cylinder 11 is connected between second actuator port of the rodless cavity of left hanging oil cylinder 11 and left change-over valve 1; 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 by right hanging oil cylinder 12 is connected between first actuator port of the rod chamber of right hanging oil cylinder 12 and right change-over valve 2, the rodless cavity oil circuit of the 4th hydraulic control one-way valve 6 by right hanging oil cylinder 12 is connected between second actuator port of the rodless cavity of right hanging oil cylinder 12 and right change-over valve 2, wherein, 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.
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, 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 by oil pressure in conjunction with hydraulic control one-way valve.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, P mouth fluid is by the left change-over valve 1 and second hydraulic control one-way valve 4, arrive left hanging oil cylinder 11 rodless cavities, 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 by 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, P mouth fluid is by the left change-over valve 1 and first hydraulic control one-way valve 3, arrive left hanging oil cylinder 11 rod chambers, 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 by 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, P mouth fluid is by right change-over valve 2 and the 4th hydraulic control one-way valve 6, arrive right hanging oil cylinder 12 rodless cavities, 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 by 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, P mouth fluid is by right change-over valve 2 and the 3rd hydraulic control one-way valve 5, arrive right hanging oil cylinder 12 rod chambers, 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 by 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, by the position signal that detects left change-over valve 1 and right change-over valve 2 are controlled, thereby realization is to the control and the adjustment of height of the carbody and attitude.
Adopting above-mentioned overall height to adjust the scheme advantage is: under different road conditions, left and right overall height can realize independent fully the adjustment, thereby improves through performance, as by culvert the time, reduces overall height; By the gully time, increase overall height.In addition, in the vehicle that has vertical leg to support (as full ground hoisting crane), when can vertical leg supporting car body, initiatively promote vehicle bridge (rather than by the passive realization of car weight compression hanging oil cylinder) by described left change-over valve 1 and right change-over valve 2, thus raising 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 and right change-over valve 2 all are under first state.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 by 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 by Section Point N2; First end of second on-off valve 8 is connected by 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 by 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 by 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 by 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 described the 3rd on-off valve 9, the 4th on-off valve 10 are in off-state simultaneously.At this moment, left hanging oil cylinder 11 rodless cavities are communicated with left energy storage 17 by the 5th on-off valve 15, and left hanging oil cylinder 11 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers by first on-off valve 7 simultaneously; Right hanging oil cylinder 12 rodless cavities are communicated with right energy storage 18 by the 6th on-off valve 16, and right hanging oil cylinder 12 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers by 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 described first on-off valve 7, second on-off valve 8 are in off-state simultaneously.At this moment, left hanging oil cylinder 11 rodless cavities are communicated with left energy storage 17 by the 5th on-off valve 15, and left hanging oil cylinder 11 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers by the 3rd on-off valve 9 simultaneously; Right hanging oil cylinder 12 rodless cavities are communicated with right energy storage 18 by the 6th on-off valve 16, and right hanging oil cylinder 12 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers by 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 by the 5th on-off valve 15, left side hanging oil cylinder 11 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers by the 3rd on-off valve 9, and left hanging oil cylinder 11 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers by first on-off valve 7 simultaneously; Right hanging oil cylinder 12 rodless cavities are communicated with right energy storage 18 by the 6th on-off valve 16, right hanging oil cylinder 12 rodless cavities are communicated with right hanging oil cylinder 12 rod chambers by the 4th on-off valve 10, simultaneously, right hanging oil cylinder 12 rodless cavities are communicated with left hanging oil cylinder 11 rod chambers by 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 being 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 disconnect with left energy storage 17 and right energy storage 18.This pattern is the locking pattern.
Under above-mentioned four kinds of patterns, described 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 lifting controllable function of side-by-side mounting oil cylinder by 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, by 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 by 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, do not repeat them here.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 the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.