CN104129250A - Vehicle, vehicle leveling system, vehicle leveling method and hydro-pneumatic suspension leveling device - Google Patents
Vehicle, vehicle leveling system, vehicle leveling method and hydro-pneumatic suspension leveling device Download PDFInfo
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- CN104129250A CN104129250A CN201410381286.2A CN201410381286A CN104129250A CN 104129250 A CN104129250 A CN 104129250A CN 201410381286 A CN201410381286 A CN 201410381286A CN 104129250 A CN104129250 A CN 104129250A
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Abstract
The invention provides a vehicle, a vehicle leveling system, a vehicle leveling method and an oil-gas suspension leveling device, wherein a first oil cylinder and a second oil cylinder which are arranged in a one-to-one correspondence mode in the oil-gas suspension leveling device are arranged between an axle and a frame of the vehicle in a bilateral symmetry mode, a first working oil port of a first oil cylinder control valve group is communicated with a rodless cavity of the first oil cylinder and a rod cavity of the second oil cylinder, a first working oil port of a second oil cylinder control valve group is communicated with a rodless cavity of the second oil cylinder and a rod cavity of the first oil cylinder, and the oil-gas suspension leveling device further comprises: one end of the pressure balance valve is communicated with a first working oil port of the first oil cylinder control valve group, and the other end of the pressure balance valve is communicated with a first working oil port of the second oil cylinder control valve group; when the pressure difference between the first oil cylinder and the second oil cylinder exceeds a set value, the first working oil port of the first oil cylinder control valve group is communicated with the first working oil port of the second oil cylinder control valve group through a pressure balance valve.
Description
Technical field
The present invention relates to engineering truck system, more specifically, relate to a kind of vehicle, leveling vehicle system, leveling vehicle method and oleo-pneumatic suspension leveling equipment.
Background technology
At present, increasing heavy engineering vehicle adopts hydro-pneumatic suspension system, and its height-adjustable function improves the cross-country carrying capacity of vehicle, side slope driveability greatly.General hydro-pneumatic suspension system has automatic flat-adjustable function, the expansion link of the hanging oil cylinder of vehicle is reached to same length before travelling to maintain the posture balancing of vehicle.
Leveling vehicle system of the prior art realizes attitude adjustment such as vehicle body rising, reductions by control cock group.Generally left front, right front, left back, right back four points have respectively a control cock group, detect in conjunction with oil cylinder position, according to the switch of certain each control cock of algorithm control, can realize vehicle automatic leveling by controller.In order to control the rising or falling speed of the each strong point of vehicle body, hanging on in-line, be provided with governor valve, this governor valve and load pressure are irrelevant, by regulating governor valve to make by the flow of each point identical, so just ensure that the each point of oleo-pneumatic suspension can synchronous ascending, same increased governor valve hanging on oil return line, can ensure to hang synchronous decline.
This leveling vehicle system of the prior art can realize in theory, while generally design, conventionally can consider that the load distribution of vehicle can be symmetrical, makes to act on left front, right front load substantially the same, and left back, right back load is basic identical; It is also identical that the energy storage of corresponding hydro-pneumatic suspension system middle left and right is selected, and comprises volume and the initial inflation process pressure and other parameters of energy storage.
But, leveling vehicle system of the prior art is unsatisfactory in actual applications, the initial pressure of left and right energy storage can cause not identically due to a variety of causes, and the adjusting of left and right governor valve also exists error and can not be in full accord, and this all may cause left and right speed difference.As in the process of hoisting, once occur certain to cireular frequency compared with another diagonal angle fast (as left front, right back very fast with respect to left back, right front), can cause the oil cylinder of this pair of horns to bear larger load, and another diagonal angle bears less load, in some cases, the load of left and right is poor very large, and this will cause a series of accident.
Visible, in the leveling process of leveling system of the prior art, usually can cause because control method is improper the load skewness weighing apparatus of the each strong point of vehicle, thus final to causing adverse effect the service life of vehicle bridge, tire.Therefore, existing leveling vehicle system only meets the leveling of position, and does not relate to the loading conditions of each strong point after leveling.
Summary of the invention
The present invention aims to provide a kind of vehicle, leveling vehicle system, leveling vehicle method and oleo-pneumatic suspension leveling equipment, can not realize load well-distributed problem to solve the leveling vehicle system of prior art.
For solving the problems of the technologies described above, according to an aspect of the present invention, a kind of oleo-pneumatic suspension leveling equipment is provided, oleo-pneumatic suspension leveling equipment comprises at least one first oil cylinder, at least one second oil cylinder, the first oil cylinder control cock group and the second oil cylinder control cock group, at least one first oil cylinder and at least one second oil cylinder arrange correspondingly, and corresponding the first oil cylinder and the second oil cylinder arranging is symmetrically arranged between the axletree and vehicle frame of vehicle one by one, the rod chamber of first the first actuator port of oil cylinder control cock group and the rodless cavity of the first oil cylinder and the second oil cylinder is communicated with, the rod chamber of second the first actuator port of oil cylinder control cock group and the rodless cavity of the second oil cylinder and the first oil cylinder is communicated with, oleo-pneumatic suspension leveling equipment also comprises: pressure balance valve, one end of pressure balance valve is communicated with the first actuator port of the first oil cylinder control cock group, the other end of pressure balance valve is communicated with the first actuator port of the second oil cylinder control cock group, wherein, in the time that the difference of pressure between the first oil cylinder and the second oil cylinder exceedes setting value, the first actuator port of the first oil cylinder control cock group is communicated with by pressure balance valve with the first actuator port of the second oil cylinder control cock group.
Further, oleo-pneumatic suspension leveling equipment comprises multiple the first oil cylinders and multiple the second oil cylinder, and the rodless cavity series connection of multiple the first oil cylinder by each the first oil cylinder, and multiple the second oil cylinders are by the rodless cavity series connection of each the second oil cylinder; Wherein, multiple the first oil cylinders are arranged on respectively on different axletrees, and multiple the second oil cylinder is arranged on corresponding axletree correspondingly with multiple the first oil cylinders respectively.
Further, oleo-pneumatic suspension leveling equipment also comprises: the first pressure sensor, and the first pressure sensor is connected with the rodless cavity of the first oil cylinder, for detection of the pressure in the rodless cavity of the first oil cylinder; The second pressure sensor, the second pressure sensor is connected with the rodless cavity of the second oil cylinder, for detection of the pressure in the rodless cavity of the second oil cylinder; Controller, controller is connected with the first pressure sensor and the second pressure sensor, for obtaining the pressure in the rodless cavity of pressure in the rodless cavity of the first oil cylinder and the second oil cylinder and drawing both difference of pressures; Wherein, controller is connected with pressure balance valve communication, in the time that difference of pressure exceedes setting value, and the conducting of control presssure balance cock.
Further, oleo-pneumatic suspension leveling equipment also comprises: the first energy storage, and the first energy storage is communicated with respectively with first the first actuator port of oil cylinder control cock group and the rodless cavity of the first oil cylinder; The second energy storage, the second energy storage is communicated with respectively with second the first actuator port of oil cylinder control cock group and the rodless cavity of the second oil cylinder.
Further, the first oil cylinder control cock group comprises the first on-off control valve and the second on-off control valve, and the import of the first on-off control valve is connected with pressure oil-source, and the outlet of the first on-off control valve is connected to the first actuator port of the first oil cylinder control cock group; The outlet of the second on-off control valve is connected with oil sump tank, and the import of the second on-off control valve is connected to the first actuator port of the first oil cylinder control cock group; The second oil cylinder control cock group comprises the 3rd on-off control valve and the 4th on-off control valve, and the import of the 3rd on-off control valve is connected with pressure oil-source, and the outlet of the 3rd on-off control valve is connected to the first actuator port of the second oil cylinder control cock group; The outlet of the 4th on-off control valve is connected with oil sump tank, and the import of the 4th on-off control valve is connected to the first actuator port of the second oil cylinder control cock group.
Further, the first oil cylinder control cock group also comprises the first governor valve and the second governor valve, and the import of the first governor valve is connected with pressure oil-source, and the outlet of the first governor valve is connected with the import of the first on-off control valve; The import of the second governor valve is connected with the outlet of the second on-off control valve, and the outlet of the second governor valve is connected with oil sump tank; The second oil cylinder control cock group also comprises the 3rd governor valve and the 4th governor valve, and the import of the 3rd governor valve is connected with pressure oil-source, and the outlet of the 3rd governor valve is connected with the import of the 3rd on-off control valve; The import of the 4th governor valve is connected with the outlet of the 4th on-off control valve, and the outlet of the 4th governor valve is connected with oil sump tank.
Further, the first oil cylinder control cock group also comprises the first check valve, and the import of the first check valve is connected with the outlet of the first governor valve, and the outlet of the first check valve is connected with the import of the first on-off control valve; The second oil cylinder control cock group also comprises the second check valve, and the import of the second check valve is connected with the outlet of the 3rd governor valve, and the outlet of the second check valve is connected with the import of the 3rd on-off control valve.
According to a second aspect of the invention, a kind of leveling vehicle system is provided, leveling vehicle system comprises two groups of oleo-pneumatic suspension leveling equipments, and two groups of oleo-pneumatic suspension leveling equipments are arranged in two groups of axletree groups of vehicle to be leveled correspondingly, and oleo-pneumatic suspension leveling equipment is above-mentioned oleo-pneumatic suspension leveling equipment.
According to a third aspect of the present invention, provide a kind of vehicle, comprised above-mentioned leveling vehicle system, and leveling vehicle system is arranged between the axletree and vehicle frame of vehicle.
According to a fourth aspect of the present invention, a kind of leveling vehicle method is provided, for the vehicle frame of leveling vehicle, vehicle is the above-mentioned vehicle of stating, and leveling vehicle method comprises the steps: step 1: make the expansion link of each the first oil cylinder in two groups of oleo-pneumatic suspension leveling equipments and each the second oil cylinder arrive vehicle frame leveling position; Step 2: detect the first oil cylinder in two groups of oleo-pneumatic suspension leveling equipments and the pressure difference value between the second oil cylinder; Step 3: the relatively pressure difference value of two groups of oleo-pneumatic suspension leveling equipments, draws the difference of pressure maxim in pressure difference value; Step 4: in the time that difference of pressure maxim exceedes setting value, the first oil cylinder and the second oil cylinder in the oleo-pneumatic suspension leveling equipment corresponding with difference of pressure maxim are communicated with; Step 5: first oil cylinder corresponding with difference of pressure maxim and the second oil cylinder are disconnected and be communicated with.
Further, between step 4 and step 5, leveling vehicle method also comprises: make the expansion link of the first oil cylinder in the oleo-pneumatic suspension leveling equipment corresponding with difference of pressure smaller value and the second oil cylinder arrive vehicle frame leveling position.
Further, after step 5, leveling vehicle method also comprises: repeating step one is to step 5, until each pressure difference value is all less than setting value while proceeding to step 4.
Further, before step 1, leveling vehicle method also comprises: detect the location information of the expansion link of the first oil cylinder and the second oil cylinder, and make the expansion link of the first oil cylinder and the second oil cylinder arrive vehicle frame leveling position according to the location information detecting.
Leveling vehicle system in the present invention is provided with pressure balance valve between the first actuator port of the first oil cylinder control cock group and the first actuator port of the second oil cylinder control cock group, by regulating this pressure balance valve can make the first actuator port of the first oil cylinder control cock group and the first actuator port of the second oil cylinder control cock group be communicated with or disconnect, and then can control connection or the disconnection of the first oil cylinder and the second oil cylinder.Like this, in the time that the difference of pressure between the first oil cylinder and the second oil cylinder exceedes setting value, by making the first actuator port of the first oil cylinder control cock group and the first actuator port of the second oil cylinder control cock group by this pressure balance valve conducting, just can make the first oil cylinder be communicated with the second oil cylinder, thereby it is identical with the pressure in the second oil cylinder to realize the first oil cylinder, even if the load that the piston rod in the first oil cylinder bears with the piston rod in the second oil cylinder is identical.
Visible, the present invention arranges pressure balance valve between the first actuator port of the first oil cylinder control cock group and the second actuator port of the second oil cylinder control cock group can make the difference of pressure in the first oil cylinder and the second oil cylinder keep within the specific limits, thereby make vehicle being carried out in the process of leveling, there will not be left and right load to distribute serious uneven problem, can effectively reduce the distortion of vehicle frame, extend the service life of vehicle bridge, reduce, because left and right is sent out distributing the uneven excessive problem of wear on tyres causing, to avoid causing and blow out.
Leveling vehicle system architecture in the present invention is simple, it is convenient to control, can be in the leveling of position, take into account the load distributing equilibrium of the left and right strong point, effectively solve leveling vehicle system of the prior art and can not realize load well-distributed problem, be relatively applicable in heavy engineering vehicle.
Brief description of the drawings
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 has schematically shown the schematic diagram of the leveling vehicle system in the present invention.
Reference numeral in figure: 11, the first oil cylinder; 12, the second oil cylinder; 20, the first oil cylinder control cock group; 21, the first on-off control valve; 22, the second on-off control valve; 23, the first governor valve; 24, the second governor valve; 25, the first check valve; 30, the second oil cylinder control cock group; 31, the 3rd on-off control valve; 32, the 4th on-off control valve; 33, the 3rd governor valve; 34, the 4th governor valve; 35, the second check valve; 40, pressure balance valve; 51, the first pressure sensor; 52, the second pressure sensor; 53, controller; 61, the first energy storage; 62, the second energy storage; 70, axletree; 81, pressure oil-source; 82, oil sump tank.
Detailed description of the invention
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.
According to a first aspect of the invention, a kind of oleo-pneumatic suspension leveling equipment is provided, please refer to Fig. 1, this oleo-pneumatic suspension leveling equipment comprises at least one first oil cylinder 11, at least one second oil cylinder 12, the first oil cylinder control cock group 20 and the second oil cylinder control cock group 30, at least one the first oil cylinder 11 and at least one second oil cylinder 12 arrange correspondingly, and corresponding the first oil cylinder 11 and the second oil cylinder 12 arranging is symmetrically arranged between the axletree 70 and vehicle frame of vehicle one by one, the rod chamber of first the first actuator port of oil cylinder control cock group 20 and the rodless cavity of the first oil cylinder 11 and the second oil cylinder 12 is communicated with, the rod chamber of second the first actuator port of oil cylinder control cock group 30 and the rodless cavity of the second oil cylinder 12 and the first oil cylinder 11 is communicated with, oleo-pneumatic suspension leveling equipment also comprises: pressure balance valve 40, one end of pressure balance valve 40 is communicated with the first actuator port of the first oil cylinder control cock group 20, the other end of pressure balance valve 40 is communicated with the first actuator port of the second oil cylinder control cock group 30, wherein, in the time that the difference of pressure between the first oil cylinder 11 and the second oil cylinder 12 exceedes setting value, the first actuator port of the first oil cylinder control cock group 20 is communicated with by pressure balance valve 40 with the first actuator port of the second oil cylinder control cock group 30.
Oleo-pneumatic suspension leveling equipment in the present invention is provided with pressure balance valve 40 between the first actuator port of the first oil cylinder control cock group 20 and the first actuator port of the second oil cylinder control cock group 30, by regulating this pressure balance valve 40 can make the first actuator port of the first oil cylinder control cock group 20 and the first actuator port of the second oil cylinder control cock group 30 be communicated with or disconnect, and then can control connection or the disconnection of the first oil cylinder 11 and the second oil cylinder 12.Like this, in the time that the difference of pressure between the first oil cylinder 11 and the second oil cylinder 12 exceedes setting value, by making the first actuator port of the first oil cylinder control cock group 20 and the first actuator port of the second oil cylinder control cock group 30 by these pressure balance valve 40 conductings, just can make the first oil cylinder 11 be communicated with the second oil cylinder 12, thereby it is identical with the pressure in the second oil cylinder 12 to realize the first oil cylinder 11, even if the load that the piston rod in the first oil cylinder 11 bears with the piston rod in the second oil cylinder 12 is identical.
Visible, the present invention arranges pressure balance valve 40 between the first actuator port of the first oil cylinder control cock group 20 and the second actuator port of the second oil cylinder control cock group 30 can make the difference of pressure in the first oil cylinder 11 and the second oil cylinder 12 keep within the specific limits, thereby make vehicle being carried out in the process of leveling, there will not be left and right load to distribute serious uneven problem, can effectively reduce the distortion of vehicle frame, extend the service life of vehicle bridge, reduce, because left and right is sent out distributing the uneven excessive problem of wear on tyres causing, to avoid causing and blow out.
Oleo-pneumatic suspension leveling equipment in the present invention is simple in structure, it is convenient to control, can be in the leveling of position, take into account the load distributing equilibrium of the left and right strong point, effectively solve leveling vehicle system of the prior art and can not realize load well-distributed problem, be relatively applicable in heavy engineering vehicle.
Preferably, pressure balance valve 40 is 2/2-way valve.Preferably, pressure balance valve 40 is 2/2-way electromagnetic valve.
Preferably, oleo-pneumatic suspension leveling equipment comprises multiple the first oil cylinders 11 and multiple the second oil cylinder 12, and multiple the first oil cylinder 11 is by the rodless cavity series connection of each the first oil cylinder 11, and multiple the second oil cylinders 12 are by the rodless cavity series connection of each the second oil cylinder 12; Wherein, multiple the first oil cylinders 11 are arranged on respectively on different axletree 70, and multiple the second oil cylinder 12 is arranged on corresponding axletree 70 correspondingly with multiple the first oil cylinders 11 respectively.
Preferably, oleo-pneumatic suspension leveling equipment also comprises: the first pressure sensor 51, the first pressure sensors 51 are connected with the rodless cavity of the first oil cylinder 11, for detection of the pressure in the rodless cavity of the first oil cylinder 11; The second pressure sensor 52, the second pressure sensors 52 are connected with the rodless cavity of the second oil cylinder 12, for detection of the pressure in the rodless cavity of the second oil cylinder 12; Controller 53, controller 53 is connected with the first pressure sensor 51 and the second pressure sensor 52, for obtaining the pressure in the rodless cavity of pressure in the rodless cavity of the first oil cylinder 11 and the second oil cylinder 12 and drawing both difference of pressures; Wherein, controller 53 is connected with pressure balance valve 40 communications, in the time that difference of pressure exceedes setting value, and 40 conductings of control presssure balance cock.
As shown in Figure 1, controller 53 is all connected with the first pressure sensor 51 and the second pressure sensor 52 in each oleo-pneumatic suspension leveling equipment, and controller 53 is all connected with the pressure balance valve 40 of each oleo-pneumatic suspension leveling equipment.Like this, controller 53 can obtain the difference of pressure between the first oil cylinder 11 and the second oil cylinder 12 in each oleo-pneumatic suspension leveling equipment with comparalive ease, and according to these pressure difference values, control pressure balance valve 40 conductings in each oleo-pneumatic suspension leveling equipment or disconnect connection.In this application, controller 53 compares the each group of pressure difference value corresponding with each oleo-pneumatic suspension leveling equipment getting, draw maximum pressure difference, and this maximum pressure difference and setting value are compared, in the time that this maximum pressure difference exceedes setting value, control pressure balance valve 40 conductings of the oleo-pneumatic suspension leveling equipment corresponding with this maximum pressure difference.
Preferably, oleo-pneumatic suspension leveling equipment comprises: the first energy storage 61, the first energy storages 61 are communicated with respectively with first the first actuator port of oil cylinder control cock group 20 and the rodless cavity of the first oil cylinder 11; The second energy storage 62, the second energy storages 62 are communicated with respectively with second the first actuator port of oil cylinder control cock group 30 and the rodless cavity of the second oil cylinder 12.In this application, the first energy storage 61 and the second energy storage 62 be as the elastic element in hydraulic efficiency pressure system, complements each other to form the effect of hydro-pneumatic spring with the first oil cylinder 11 and the second oil cylinder 12.
Preferably, the first oil cylinder control cock group 20 comprises the first on-off control valve 21 and the second on-off control valve 22, the import of the first on-off control valve 21 is connected with pressure oil-source 81, and the outlet of the first on-off control valve 21 is connected to the first actuator port of the first oil cylinder control cock group 20; The outlet of the second on-off control valve 22 is connected with oil sump tank 82, the import of the second on-off control valve 22 and the first actuator port that is connected to the first oil cylinder control cock group 20; The second oil cylinder control cock group 30 comprises that the import of the 3rd on-off control valve 31 and the 4th on-off control valve 32, the three on-off control valve 31 is connected with pressure oil-source 81, and the outlet of the 3rd on-off control valve 31 is connected to the first actuator port of the second oil cylinder control cock group 30; The outlet of the 4th on-off control valve 32 is connected with oil sump tank 82, and the import of the 4th on-off control valve 32 is connected to the first actuator port of the second oil cylinder control cock group 30.
Oleo-pneumatic suspension leveling equipment in the present invention is the hydro-pneumatic suspension system of left and right communication type, as shown in Figure 1, the rodless cavity of two oil cylinders and rod chamber cross connection, can realize attitude adjustment such as vehicle body rising, reductions by the first oil cylinder control cock group 20 and the second oil cylinder control cock group 30, and rigidity, the elasticity that can realize leveling vehicle system are switched, between the oil cylinder of two of left and right, be connected with pressure balance valve 40, can the load of the balance left and right sides when it is communicated with.
As shown in Figure 1, in the time detecting that the position of the piston rod in the first oil cylinder 11 and the second oil cylinder 12 is positioned at below leveling point, control the first on-off control valve 21 and the second on-off control valve 22 conductings, pressure oil enters in oil cylinder and energy storage, in the first energy storage 61 and the second energy storage 62, being filled with certain high pressure oil makes to set up after certain pressure (load pressure), promotion oil cylinder is stretched out, and then vehicle is raise; Piston rod in the first oil cylinder 11 and the second oil cylinder 12 is all elevated to behind leveling position, controls the first on-off control valve 21 and the second on-off control valve 22 disconnection connections, and position leveling finishes.
Preferably, the first oil cylinder control cock group 20 also comprises that the import of the first governor valve 23 and the second governor valve 24, the first governor valves 23 is connected with pressure oil-source 81, and the outlet of the first governor valve 23 is connected with the import of the first on-off control valve 21; The import of the second governor valve 24 is connected with the outlet of the second on-off control valve 22, and the outlet of the second governor valve 24 is connected with oil sump tank 82; The second oil cylinder control cock group 30 also comprises that the import of the 3rd governor valve 33 and the 4th governor valve 34, the three governor valves 33 is connected with pressure oil-source 81, and the outlet of the 3rd governor valve 33 is connected with the import of the 3rd on-off control valve 31; The import of the 4th governor valve 34 is connected with the outlet of the 4th on-off control valve 32, and the outlet of the 4th governor valve 34 is connected with oil sump tank 82.In this application, the first governor valve 23 to acting as of the 4th governor valve 34 makes the rising or falling speed of each strong point controlled, even if the stretching speed of the piston rod of the piston rod of the first oil cylinder 11 and the second oil cylinder 12 is controlled.
Preferably, the first oil cylinder control cock group 20 also comprises that the import of the first check valve 25, the first check valves 25 is connected with the outlet of the first governor valve 23, and the outlet of the first check valve 25 is connected with the import of the first on-off control valve 21; The second oil cylinder control cock group 30 also comprises that the import of the second check valve 35, the second check valves 35 is connected with the outlet of the 3rd governor valve 33, and the outlet of the second check valve 35 is connected with the import of the 3rd on-off control valve 31.Preferably, first actuator port that goes out interruption-forming the first oil cylinder control cock group 20 of the first on-off control valve 21 being connected with the rodless cavity of the first oil cylinder 11; First actuator port that goes out interruption-forming the second oil cylinder control cock group 30 of the 3rd on-off control valve 31 is also connected with the rodless cavity of the second oil cylinder 12.Preferably, one end of pressure balance valve 40 is connected with the outlet of the first on-off control valve 21, and the other end of pressure balance valve 40 is connected with the outlet of the 3rd on-off control valve 31.Like this, by 40 conductings of control presssure balance cock, just can make the outlet of the first on-off control valve 21 be communicated with the outlet of the 3rd on-off control valve 31.Preferably, the first on-off control valve 21, the second on-off control valve 22, the 3rd on-off control valve 31 and the 4th on-off control valve 32 are 2/2-way valve.Preferably, the first on-off control valve 21, the second on-off control valve 22, the 3rd on-off control valve 31 and the 4th on-off control valve 32 are electromagnetic valve.
According to a second aspect of the invention, a kind of leveling vehicle system is provided, this leveling vehicle system comprises two groups of oleo-pneumatic suspension leveling equipments, and two groups of oleo-pneumatic suspension leveling equipments are arranged on respectively in two groups of axletree groups of vehicle to be leveled correspondingly, and oleo-pneumatic suspension leveling equipment is above-mentioned oleo-pneumatic suspension leveling equipment.
According to a third aspect of the present invention, provide a kind of vehicle, comprised above-mentioned leveling vehicle system, and leveling vehicle system is arranged between the axletree 70 and vehicle frame of vehicle.
Vehicle in the present invention is carrying out in the process of leveling, there will not be left and right load to distribute serious uneven problem, can effectively reduce the distortion of vehicle frame, extend the service life of vehicle bridge, reduce, because left and right is sent out distributing the uneven excessive problem of wear on tyres causing, to avoid causing and blow out.
According to a fourth aspect of the present invention, a kind of leveling vehicle method is provided, for the vehicle frame of leveling vehicle, vehicle is above-mentioned vehicle, and leveling vehicle method comprises the steps: step 1: make the expansion link of each the first oil cylinder in two groups of oleo-pneumatic suspension leveling equipments and each the second oil cylinder arrive vehicle frame leveling position; Step 2: detect the first oil cylinder in two groups of oleo-pneumatic suspension leveling equipments and the pressure difference value between the second oil cylinder; Step 3: the relatively pressure difference value of two groups of oleo-pneumatic suspension leveling equipments, draws the difference of pressure maxim in pressure difference value; Step 4: in the time that difference of pressure maxim exceedes setting value, the first oil cylinder and the second oil cylinder in the oleo-pneumatic suspension leveling equipment corresponding with difference of pressure maxim are communicated with; Step 5: first oil cylinder corresponding with difference of pressure maxim and the second oil cylinder are disconnected and be communicated with.
Preferably, between step 4 and step 5, leveling vehicle method also comprises: make the expansion link of the first oil cylinder in the oleo-pneumatic suspension leveling equipment corresponding with difference of pressure smaller value and the second oil cylinder arrive vehicle frame leveling position.
As shown in Figure 1, in this application, vehicle comprises front axle and rear axle, there are two groups of oleo-pneumatic suspension leveling equipments, after vehicle being carried out to position leveling vehicle attitude is adjusted to the right place, vehicle can be become to supported at three point from four-point supporting by above-mentioned leveling vehicle method, at this moment vehicle frame only can have in leveling position less attitude variation; Carry out position leveling at this state, after leveling, the load missionary society of each strong point diminishes again, and repeatedly carries out load balance adjusting, finally can make each point unbalance loading in the default deviation upper limit, and now vehicle had both met position leveling, met load simultaneously and divided balancing.
Preferably, after step 5, leveling vehicle method also comprises: repeating step one is to step 6, until each pressure difference value is all less than setting value while proceeding to step 4.
First vehicle is carried out to position leveling, near the leveling point of position, the large strong point of load deviation is carried out to load balance, switch to three dot systems and carrying out position leveling, repeatedly carry out this process, make the pressure difference value between the first oil cylinder and second oil cylinder of all oleo-pneumatic suspension leveling equipments all be less than setting value, finally can make vehicle both meet position leveling, meet load simultaneously and divide balancing.
Preferably, before step 1, leveling vehicle method also comprises: detect the location information of the expansion link of the first oil cylinder and the second oil cylinder, and make the expansion link of the first oil cylinder and the second oil cylinder arrive vehicle frame leveling position according to the location information detecting.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (13)
1. an oleo-pneumatic suspension leveling equipment, described oleo-pneumatic suspension leveling equipment comprises at least one first oil cylinder (11), at least one second oil cylinder (12), the first oil cylinder control cock group (20) and the second oil cylinder control cock group (30), described at least one first oil cylinder (11) and described at least one second oil cylinder (12) arrange correspondingly, and corresponding described the first oil cylinder (11) and described the second oil cylinder (12) arranging is symmetrically arranged between the axletree (70) and vehicle frame of vehicle one by one, the first actuator port of described the first oil cylinder control cock group (20) is communicated with the rodless cavity of described the first oil cylinder (11) and the rod chamber of described the second oil cylinder (12), the first actuator port of described the second oil cylinder control cock group (30) is communicated with the rodless cavity of described the second oil cylinder (12) and the rod chamber of described the first oil cylinder (11), it is characterized in that, described oleo-pneumatic suspension leveling equipment also comprises:
Pressure balance valve (40), one end of described pressure balance valve (40) is communicated with the first actuator port of described the first oil cylinder control cock group (20), and the other end of described pressure balance valve (40) is communicated with the first actuator port of described the second oil cylinder control cock group (30);
Wherein, in the time that the difference of pressure between described the first oil cylinder (11) and described the second oil cylinder (12) exceedes setting value, the first actuator port of described the first oil cylinder control cock group (20) is communicated with by described pressure balance valve (40) with the first actuator port of described the second oil cylinder control cock group (30).
2. oleo-pneumatic suspension leveling equipment according to claim 1, it is characterized in that, described oleo-pneumatic suspension leveling equipment comprises multiple described the first oil cylinders (11) and multiple described the second oil cylinders (12), and described multiple the first oil cylinders (11) are by the rodless cavity series connection of each described the first oil cylinder (11), and described multiple the second oil cylinders (12) are by the rodless cavity series connection of each described the second oil cylinder (12); Wherein, it is upper that described multiple the first oil cylinders (11) are arranged on respectively different described axletrees (70), and described multiple the second oil cylinders (12) are arranged on corresponding described axletree (70) correspondingly with described multiple the first oil cylinders (11) respectively.
3. oleo-pneumatic suspension leveling equipment according to claim 1, is characterized in that, described oleo-pneumatic suspension leveling equipment also comprises:
The first pressure sensor (51), described the first pressure sensor (51) is connected with the rodless cavity of described the first oil cylinder (11), for detection of the pressure in the rodless cavity of described the first oil cylinder (11);
The second pressure sensor (52), described the second pressure sensor (52) is connected with the rodless cavity of described the second oil cylinder (12), for detection of the pressure in the rodless cavity of described the second oil cylinder (12);
Controller (53), described controller (53) is connected with described the first pressure sensor (51) and described the second pressure sensor (52), for obtaining the pressure in the rodless cavity of pressure in the rodless cavity of described the first oil cylinder (11) and described the second oil cylinder (12) and drawing both difference of pressures;
Wherein, described controller (53) is connected with described pressure balance valve (40) communication, in the time that described difference of pressure exceedes described setting value, controls described pressure balance valve (40) conducting.
4. oleo-pneumatic suspension leveling equipment according to claim 1, is characterized in that, described oleo-pneumatic suspension leveling equipment also comprises:
The first energy storage (61), described the first energy storage (61) is communicated with respectively with the first actuator port of described the first oil cylinder control cock group (20) and the rodless cavity of described the first oil cylinder (11);
The second energy storage (62), described the second energy storage (62) is communicated with respectively with the first actuator port of described the second oil cylinder control cock group (30) and the rodless cavity of described the second oil cylinder (12).
5. oleo-pneumatic suspension leveling equipment according to claim 1, is characterized in that,
Described the first oil cylinder control cock group (20) comprises the first on-off control valve (21) and the second on-off control valve (22), the import of described the first on-off control valve (21) is connected with pressure oil-source (81), and the outlet of described the first on-off control valve (21) is connected to the first actuator port of described the first oil cylinder control cock group (20); The outlet of described the second on-off control valve (22) is connected with oil sump tank (82), and the import of described the second on-off control valve (22) is connected to the first actuator port of described the first oil cylinder control cock group (20);
Described the second oil cylinder control cock group (30) comprises the 3rd on-off control valve (31) and the 4th on-off control valve (32), the import of described the 3rd on-off control valve (31) is connected with described pressure oil-source (81), and the outlet of described the 3rd on-off control valve (31) is connected to the first actuator port of described the second oil cylinder control cock group (30); The outlet of described the 4th on-off control valve (32) is connected with described oil sump tank (82), and the import of described the 4th on-off control valve (32) is connected to the first actuator port of described the second oil cylinder control cock group (30).
6. oleo-pneumatic suspension leveling equipment according to claim 5, is characterized in that,
Described the first oil cylinder control cock group (20) also comprises the first governor valve (23) and the second governor valve (24), the import of described the first governor valve (23) is connected with described pressure oil-source (81), and the outlet of described the first governor valve (23) is connected with the import of described the first on-off control valve (21); The import of described the second governor valve (24) is connected with the outlet of described the second on-off control valve (22), and the outlet of described the second governor valve (24) is connected with described oil sump tank (82);
Described the second oil cylinder control cock group (30) also comprises the 3rd governor valve (33) and the 4th governor valve (34), the import of described the 3rd governor valve (33) is connected with described pressure oil-source (81), and the outlet of described the 3rd governor valve (33) is connected with the import of described the 3rd on-off control valve (31); The import of described the 4th governor valve (34) is connected with the outlet of described the 4th on-off control valve (32), and the outlet of described the 4th governor valve (34) is connected with described oil sump tank (82).
7. oleo-pneumatic suspension leveling equipment according to claim 6, is characterized in that,
Described the first oil cylinder control cock group (20) also comprises the first check valve (25), the import of described the first check valve (25) is connected with the outlet of described the first governor valve (23), and the outlet of described the first check valve (25) is connected with the import of described the first on-off control valve (21);
Described the second oil cylinder control cock group (30) also comprises the second check valve (35), the import of described the second check valve (35) is connected with the outlet of described the 3rd governor valve (33), and the outlet of described the second check valve (35) is connected with the import of described the 3rd on-off control valve (31).
8. a leveling vehicle system, described leveling vehicle system comprises two groups of oleo-pneumatic suspension leveling equipments, and described two groups of oleo-pneumatic suspension leveling equipments are arranged in two groups of axletree groups of vehicle to be leveled correspondingly, it is characterized in that, described oleo-pneumatic suspension leveling equipment is the oleo-pneumatic suspension leveling equipment described in any one in claim 1 to 7.
9. a vehicle, is characterized in that, comprises leveling vehicle system claimed in claim 8, and described leveling vehicle system is arranged between the axletree (70) and vehicle frame of described vehicle.
10. a leveling vehicle method, for the vehicle frame of leveling vehicle, described vehicle is vehicle claimed in claim 9, it is characterized in that, described leveling vehicle method comprises the steps:
Step 1: make the expansion link of each described the first oil cylinder in described two groups of oleo-pneumatic suspension leveling equipments and each described the second oil cylinder arrive vehicle frame leveling position;
Step 2: detect the pressure difference value between described the first oil cylinder and described the second oil cylinder in described two groups of oleo-pneumatic suspension leveling equipments;
Step 3: the described pressure difference value of more described two groups of oleo-pneumatic suspension leveling equipments, draws the difference of pressure maxim in described pressure difference value;
Step 4: in the time that described difference of pressure maxim exceedes setting value, described the first oil cylinder and described the second oil cylinder in the oleo-pneumatic suspension leveling equipment corresponding with described difference of pressure maxim are communicated with;
Step 5: described first oil cylinder corresponding with described difference of pressure maxim and described the second oil cylinder are disconnected and be communicated with.
11. leveling vehicle methods according to claim 10, is characterized in that, between step 4 and step 5, described leveling vehicle method also comprises:
Make the expansion link of described the first oil cylinder in the described oleo-pneumatic suspension leveling equipment corresponding with difference of pressure smaller value and described the second oil cylinder arrive vehicle frame leveling position.
12. according to the leveling vehicle method described in claim 10 or 11, it is characterized in that, after step 5, described leveling vehicle method also comprises:
Repeating step one is to step 5, until while proceeding to step 4 described in each pressure difference value be all less than described setting value.
13. according to the leveling vehicle method described in claim 10 or 11, it is characterized in that, before step 1, described leveling vehicle method also comprises:
Detect the location information of the expansion link of described the first oil cylinder and described the second oil cylinder, and make the expansion link of described the first oil cylinder and described the second oil cylinder arrive described vehicle frame leveling position according to the described location information detecting.
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| CN108437734A (en) * | 2018-03-23 | 2018-08-24 | 三汽车起重机械有限公司 | A kind of hydro-pneumatic suspension system and the engineering machinery with the system |
| CN109398019A (en) * | 2017-08-16 | 2019-03-01 | 特雷克斯全球有限公司 | Method for controlling the suspension system of autocrane gas liquid type |
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| CN108437733B (en) * | 2018-03-15 | 2020-07-24 | 中国农业大学 | High-speed agricultural vehicle platform pre-detection active leveling system and leveling method |
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Application publication date: 20141105 |