CN102529631B - Buffer protection type oil-gas suspension system and vehicle - Google Patents
Buffer protection type oil-gas suspension system and vehicle Download PDFInfo
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- CN102529631B CN102529631B CN201110439521.3A CN201110439521A CN102529631B CN 102529631 B CN102529631 B CN 102529631B CN 201110439521 A CN201110439521 A CN 201110439521A CN 102529631 B CN102529631 B CN 102529631B
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- 239000000725 suspension Substances 0.000 title claims abstract description 82
- 230000006835 compression Effects 0.000 claims abstract description 87
- 238000007906 compression Methods 0.000 claims abstract description 87
- 238000013016 damping Methods 0.000 claims abstract description 26
- 230000003139 buffering effect Effects 0.000 claims description 66
- 238000004146 energy storage Methods 0.000 claims description 39
- 239000012530 fluid Substances 0.000 claims description 13
- 238000013459 approach Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 166
- 230000000694 effects Effects 0.000 abstract description 5
- 239000010720 hydraulic oil Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Abstract
The buffer protection type oil-gas suspension system comprises a suspension oil cylinder and two side energy accumulators (1), wherein one side energy accumulator in the two side energy accumulators (1) is communicated with a rodless cavity of the suspension oil cylinder, the other side energy accumulator is communicated with a rod cavity of the suspension oil cylinder through a throttling hole (8), the throttling hole (8) is connected with a buffer oil way (12) in parallel, and a reversing valve used for cutting off the buffer oil way (12) when the compression stroke of the suspension oil cylinder reaches a preset compression stroke is arranged on the buffer oil way (12). In addition, the invention also provides a vehicle adopting the buffer protection type oil-gas suspension system. According to the invention, when the compression stroke of the suspension oil cylinder exceeds the preset compression stroke, the buffer oil circuit between the rod cavity of the suspension oil cylinder and the energy accumulator is cut off, so that hydraulic oil in the energy accumulator can only enter the rod cavity of the suspension oil cylinder through the throttling hole, the oil inlet amount of the rod cavity is obviously reduced, the compression damping effect is rapidly increased, and the effective buffer protection effect is achieved.
Description
Technical field
The present invention relates to a kind of hydro-pneumatic suspension system, particularly, relate to a kind of buffering protection type oil gas suspension system with buffering protection function.In addition, the invention still further relates to a kind of vehicle with described buffering protection type oil gas suspension system.
Background technology
Suspension technology is one of gordian technique determining vehicle running smoothness, development of automobile has formed the multiple suspension forms such as metal spring, air bellow, hydro-pneumatic spring, rubber spring, hydraulic spring for over 100 years more than a hundred years, and wherein hydro pneumatic suspension extensively adopts in heavy-duty vehicle with its distinct advantages.
Fig. 1 shows the hydro-pneumatic suspension system principle schematic of prior art, wherein, the first, in the time of compression, rodless cavity 9 volumes expand, and now the fluid in plunger shaft 10 flows into rodless cavity 9 by damping hole 3 and check valve 4; The second, in the time stretching, the volume of rod chamber 9 dwindles, and now check valve 4 is closed, and the fluid of rod chamber only enters plunger shaft 10 by damping hole 3, and due to only, by damping hole 3 delivering oils, during therefore with respect to compression, shock damping action increases, thereby plays damping of vibrations.In addition, Chinese utility model patent application CN200820005216 also discloses a kind of hydro-pneumatic suspension system, and the hydro-pneumatic suspension system of the prior art shown in itself and Fig. 1 is substantially similar.
The development of vehicle, especially heavy-duty vehicle makes the volume of himself increasingly huge, and total weight, overall dimensions, the axle load of road running standard to vehicle all limits, thereby to having higher requirement of hydro-pneumatic suspension system, particularly, hydro-pneumatic suspension system should be in meeting its cushioning performance the scantling of structure of himself as far as possible little, thereby reduction height of car, make vehicle have better road driving, but the stroke of shortening oleo-pneumatic suspension certainly will make vehicle in the time requiring large stroke vibration damping, have the danger of rigid collision.
Particularly, in road vehicle driving process, there is limit for height requirement, and the stretching of large engineering vehicle oleo-pneumatic suspension, compression stroke are about respectively 140mm, the stroke of the hanging oil cylinder of hydro-pneumatic suspension system directly affects the height of vehicle, existing hydro-pneumatic suspension system shortens in order to reduce height of car after the compression stroke of hanging oil cylinder in hydro-pneumatic suspension system conventionally, may cause the piston rod of hanging oil cylinder and the rigid collision of cylinder barrel bottom and vehicle frame and hanging oil cylinder, this can cause the damage of hydro-pneumatic suspension system.
In view of this, need to design a kind of novel hydro-pneumatic suspension system, to overcome the above-mentioned defect of prior art.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of hydro-pneumatic suspension system, this hydro-pneumatic suspension system can be avoided the parts generation rigid collision such as piston rod and cylinder barrel bottom and hanging oil cylinder and carriage frame of hanging oil cylinder hanging oil cylinder in the time that compression stroke is excessive effectively, thereby guarantees the safety of hydro-pneumatic suspension system.
On this basis, the further technical matters to be solved of the present invention is to provide a kind of vehicle, and the hydro-pneumatic suspension system of this vehicle can avoid hanging oil cylinder that rigid collision occurs in the time that compression stroke is excessive effectively, thereby prevents that hydro-pneumatic suspension system is damaged.
In order to solve the problems of the technologies described above, the invention provides a kind of buffering protection type oil gas suspension system, comprise hanging oil cylinder and both sides energy storage, a side energy storage in this both sides energy storage is communicated with the rodless cavity of described hanging oil cylinder, wherein, opposite side energy storage in this both sides energy storage is communicated with the rod chamber of described hanging oil cylinder via cutoff port, this cutoff port is parallel with the buffering oil circuit of the rod chamber that is communicated with described opposite side energy storage and described hanging oil cylinder, this buffering oil circuit is provided with the change-over valve for cut off described buffering oil circuit in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke.
Specifically selectively, described change-over valve is bi-bit bi-pass solenoid directional control valve.
Preferably, described buffering protection type oil gas suspension system also comprises the travel switch for detection of the compression stroke of described hanging oil cylinder, and described change-over valve is electric control reversing valve, and described travel switch is connected on the circuit of described electric control reversing valve.
Further preferably, described formation switch is approach switch.
Specifically selectively, described electric control reversing valve is the electric control reversing valve that makes the conducting of described buffering oil circuit under off-position, described travel switch is closure in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke, to make the circuit communication of described electric control reversing valve, to the power supply of this electric control reversing valve, described electric control reversing valve obtains electric and cuts off described buffering oil circuit.
Specifically select as another kind, described electric control reversing valve is the electric control reversing valve valve that makes the conducting of described buffering oil circuit under "on" position, described travel switch is opened in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke, stop to the power supply of this electric control reversing valve described electric control reversing valve dead electricity and cut off described buffering oil circuit to make the circuitry cuts of described electric control reversing valve.
Selectively, described hydro-pneumatic suspension system also comprises controller and the sensor for detection of the compression stroke of described hanging oil cylinder, described change-over valve is electric control reversing valve, described controller is electrically connected on described sensor and described change-over valve, described controller receives the compression stroke signal that described sensor transmits, and in the time that described compression stroke is greater than described predetermined compression stroke, controls described change-over valve and cut off described buffering oil circuit.
Particularly, described cutoff port forms by the flow regulating valve being arranged on the oil circuit between described opposite side energy storage and the rod chamber of described hanging oil cylinder.
Preferably, described flow regulating valve is adjustable throttle valve.
Particularly, on the oil circuit between described cutoff port and the rod chamber of described hanging oil cylinder, be also provided with damping hole in parallel and check valve, the forward hydraulic fluid port of this check valve is communicated with described cutoff port, and oppositely hydraulic fluid port is communicated with the rod chamber of described hanging oil cylinder.
More specifically, the piston rod of described hanging oil cylinder is hollow piston rod, the inner chamber of this piston rod is divided into the central oil passage and the rod end chamber that are communicated with the rodless cavity of described hanging oil cylinder, and a described side energy storage is communicated with the rodless cavity of described hanging oil cylinder via described central oil passage; On the chamber wall of described rod end chamber, be formed with described damping hole and be provided with described check valve, described opposite side energy storage is communicated with the rod chamber of described hanging oil cylinder via described rod end chamber.
On the basis of above-mentioned buffering protection type oil gas suspension system, the present invention also provides a kind of vehicle, and wherein, the suspension of this vehicle is according to the buffering protection type oil gas suspension system described in technique scheme any one.
Pass through technique scheme; cutoff port in parallel and buffering oil circuit are set on the oil circuit that buffering protection type oil gas suspension system of the present invention and vehicle thereof are communicated with energy storage by the rod chamber in hanging oil cylinder; under normal condition, cushion oil circuit in connected state; thereby guarantee being communicated with between hanging oil cylinder and energy storage, to realize normal buffer shock-absorbing function.Exceed predetermined compression stroke (the safe compression stroke of setting) once the compression stroke of hanging oil cylinder; to cushion oil circuit by the change-over valve on buffering oil circuit cuts off; thereby make the hydraulic oil in energy storage only can enter by cutoff port the rod chamber of hanging oil cylinder; this causes the oil inlet quantity of rod chamber significantly to reduce; if hanging oil cylinder continues compression, can produce the negative pressure that stops hanging oil cylinder to continue compression at the rod chamber of hanging oil cylinder; thereby compression damping effect is increased rapidly, play actv. buffer protection function.Like this, even if the driving conditions very severe of vehicle also can be avoided vehicle frame and the hanging oil cylinder generation rigid collision of piston rod and cylinder barrel bottom and the vehicle of hanging oil cylinder effectively, thereby guaranteed the safety and reliability of suspension.The present invention is simple in structure, and oil circuit transformation is relatively easy, has good technology application and promotional value.
Other features and advantages of the present invention are described in detail the specific embodiment part subsequently.
Accompanying drawing explanation
Following accompanying drawing is used to provide a further understanding of the present invention, and forms the part of specification sheets, and itself and the following specific embodiment one are used from explanation the present invention, but protection scope of the present invention is not limited to following the drawings and the specific embodiments.In the accompanying drawings:
Fig. 1 is the principle schematic of the hydro-pneumatic suspension system of prior art.
Fig. 2 is the principle schematic of the hydro-pneumatic suspension system of the specific embodiment of the invention.
Description of reference numerals:
1 energy storage; 2 piston rods;
3 damping holes; 4 check valves;
5 cylinder barrels; 6 travel switches;
7 bi-bit bi-pass solenoid directional control valves; 8 cutoff ports;
9 rod chambers; 10 rodless cavities;
11 rod end chambers; 12 buffering oil circuits;
13 central oil passages.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, should be understood that, the specific embodiment described herein is only for description and interpretation the present invention, and protection scope of the present invention is not limited to the following specific embodiment.
Shown in Figure 1, buffering protection type oil gas suspension system of the present invention comprises hanging oil cylinder and both sides energy storage 1, a side energy storage in both sides energy storage 1 is communicated with the rodless cavity 10 of described hanging oil cylinder, opposite side energy storage is communicated with the rod chamber 9 of described hanging oil cylinder via cutoff port 8, this cutoff port 8 is parallel with the buffering oil circuit 12 of the rod chamber 9 that is communicated with described opposite side energy storage and described hanging oil cylinder, this buffering oil circuit 12 is provided with the change-over valve valve (preferably electric control reversing valve) for cut off buffering oil circuit 12 in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke.
In the basic technical scheme of above-mentioned hydro-pneumatic suspension system, the major technique design of hydro-pneumatic suspension system of the present invention is to make opposite side energy storage to be communicated with the rod chamber 9 of hanging oil cylinder via cutoff port 8, and this cutoff port 8 is parallel with the change-over valve for cut off buffering oil circuit 12 in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke.In addition, apparently, the hydraulic structure of the hydro-pneumatic suspension system shown in Fig. 2 of the present invention and conventional hydro-pneumatic suspension system (referring to Fig. 1) are similar.For example, in order further to improve the damping cushion effect of hydro-pneumatic suspension system, hydro-pneumatic suspension system shown in Fig. 2 of the present invention also can adopt damping hole 3 and check valve 4, particularly, oil circuit between the rod chamber 9 of cutoff port 8 and hanging oil cylinder is provided with damping hole in parallel 3 and check valve 4, the forward hydraulic fluid port of this check valve 4 is communicated with described cutoff port 8, and oppositely hydraulic fluid port is communicated with the rod chamber 9 of described hanging oil cylinder.On concrete structure, the piston rod of described hanging oil cylinder can be hollow piston rod, the inner chamber of this piston rod is divided into the central oil passage 13 and the rod end chamber 11 that are communicated with the rodless cavity 10 of hanging oil cylinder, wherein an above-mentioned side energy storage is communicated with the rodless cavity 10 of hanging oil cylinder via central oil passage 13, on the chamber wall of rod end chamber 11, be formed with described damping hole 3 and be provided with check valve 4, above-mentioned opposite side energy storage is communicated with the rod chamber 9 of hanging oil cylinder via rod end chamber 11.Certainly, above-mentioned damping hole 3 is only typical structure with the structure that specifically arranges of check valve 4, and it arranges form can be diversified, is not limited to the characteristic form shown in Fig. 2.
Preferred implementation and the simple variant embodiment thereof relevant to the technical conceive of buffering protection type oil gas suspension system of the present invention are below described.
Shown in Figure 2, buffering be provided with on oil circuit 12 change-over valve for when needed while reaching predetermined compression stroke (be the compression stroke of hanging oil cylinder) cut off buffering oil circuit 12.For the technical personnel of Hydraulic Field, the change-over valve that can realize this oil circuit cutting function is varied, such as the electric control reversing valve such as electromagnetic switch valve, electric-controlled switch valve.Shown in Fig. 2 is bi-bit bi-pass solenoid directional control valve 7, and apparently, change-over valve is that 3-position 4-way solenoid directional control valve etc. also can be realized above-mentioned functions, is only that some interfaces are wherein without connecting.Electric control reversing valve can also be replaced by other change-over valves such as pilot operated valve device or pneumatic valve, just its mode difference, and this is obvious for those skilled in the art.
In above-mentioned basic technical scheme, change-over valve cuts off described buffering oil circuit 12 in the time that the compression stroke of hanging oil cylinder reaches predetermined compression stroke.This can diversified technical measures realize, the most simply, chaufeur can manually be controlled change-over valve and cut off buffering oil circuit 12 in the time that the road conditions of travelling are more severe, makes to be only communicated with by cutoff port 8 between energy storage and the rod chamber of hanging oil cylinder, reduces the oil inlet quantity of the rod chamber of hanging oil cylinder.Certainly, hydro-pneumatic suspension system of the present invention adopts the technical measures that can automatically control.
For example; particularly; above-mentioned change-over valve adopts electric control reversing valve; buffering protection type oil gas suspension system of the present invention also comprises travel switch 6; preferably, the trip switch 6 is approach switch (being non-contact type travel switch), and the trip switch 6 is connected on the circuit of described change-over valve; and be arranged on the desired location of piston rod of described hanging oil cylinder, for example, on the bar head of piston rod.Adopt at travel switch 6 under the situation of described approach switch, the setting position of approach switch can be various, be arranged on piston rod and be not limited to, for example be arranged on cylinder barrel, be arranged near position hanging oil cylinder by support, detect the position of piston rod with respect to cylinder barrel as long as can play.Under the situation that travel switch 6 of the present invention is described approach switch, the relative distance of described approach switch cylinder barrel by sensing and described hanging oil cylinder in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke and change-over switch state.Within the scope of technical conceive of the present invention, travel switch 6 also can adopt common mechanical contact-type travel switch, in this case, this mechanical contact-type travel switch can be arranged on piston rod, with in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke and the cylinder barrel 5 of this hanging oil cylinder collide and change-over switch state.That is to say, predetermined compression stroke is corresponding to the safe compression stroke of hanging oil cylinder, in the time that piston rod is retracted into this desired location, if hanging oil cylinder continues compression, vehicle frame of the piston rod of hanging oil cylinder and cylinder barrel 5 bottoms and vehicle etc. has and the danger of hanging oil cylinder rigid collision, therefore the general namely safe compression stroke of hanging oil cylinder of described predetermined compression stroke, this can, by those skilled in the art according to the total compression travel settings of hanging oil cylinder, be generally less than the total compression stroke of hanging oil cylinder.Under this embodiment, can there are two kinds form is specifically set: first, shown in Figure 3, change-over valve can be for making to cushion the electric control reversing valve of oil circuit 12 conductings under off-position, travel switch 6 is closure in the time that the compression stroke of hanging oil cylinder reaches predetermined compression stroke, to make the circuit communication of change-over valve, to the power supply of this change-over valve, change-over valve obtains electric (spool of example bi-bit bi-pass reversing solenoid valve 7 as shown in Figure 3 moves to rest position) and cut off described buffering oil circuit 12.Second, change-over valve also can be for making to cushion the electric control reversing valve of oil circuit 12 conductings under "on" position, travel switch 6 is opened in the time that the compression stroke of hanging oil cylinder reaches predetermined compression stroke, stop making the circuitry cuts of change-over valve to this change-over valve power supply, change-over valve dead electricity and cut off buffering oil circuit 12, for example in Fig. 3, need only bi-bit bi-pass solenoid directional control valve open in usual is changed into normally closed bi-bit bi-pass solenoid directional control valve, make under normal circumstances the energising of normally closed bi-bit bi-pass solenoid directional control valve and keep buffering oil circuit 12 to be communicated with, once this normally closed bi-bit bi-pass solenoid directional control valve power-off, spool is moved to rest position in action of the spring, thereby cut off buffering oil circuit 12.
For another example, hydro-pneumatic suspension system of the present invention can comprise controller and the sensor for detection of the compression stroke of described hanging oil cylinder, described change-over valve adopts electric control reversing valve, described controller is electrically connected on sensor and described electric control reversing valve, controller receives the compression stroke signal that described sensor transmits, and in the time that described compression stroke is greater than above-mentioned predetermined compression stroke, controls described change-over valve and cut off described buffering oil circuit 12.This form of implementation need to be controlled change-over valve by means of controller; and sensor only detects the compression stroke of hanging oil cylinder and do not work to control change-over valve circuit; as the selectable form of implementation within the scope of the technology of the present invention design, it also belongs to protection scope of the present invention.Described sensor generally can adopt displacement pickup, for example inductive pickoff, capacitance-type sensor or electro-optical pickoff, its setting position can be determined according to installation situation, change as long as can effectively detect the piston rod of hanging oil cylinder and the relative position of cylinder barrel, for example, typically can be arranged on piston rod or cylinder barrel.
In addition, cutoff port 8 can form by various ways, for example it can be formed directly on the hydraulic oil pipe of the formation oil circuit between energy storage and hanging oil cylinder rod chamber 9, preferably, cutoff port 8 forms by the flow regulating valve being arranged on the oil circuit between above-mentioned opposite side energy storage and the rod chamber 9 of hanging oil cylinder.More preferably, this flow regulating valve is adjustable throttle valve, and the cutoff port 8 of this flow regulating valve inside is also adjustable like this, and this can need according to application the throttling flow of adjusting joint discharge orifice 8.
By the description of the above-mentioned specific embodiment, the technical characteristics of hydro-pneumatic suspension system of the present invention is: first, on the oil circuit between above-mentioned opposite side energy storage and the rod chamber 9 of hanging oil cylinder by cutoff port and be provided with change-over valve buffering oil circuit form buffer protection, work as vehicle, for example engineering truck is under severe driving conditions, oleo-pneumatic suspension compression stroke plays buffer protection function when excessive, thereby avoids rigidity contact; The second, preferably, the throttle opening of cutoff port 8 can regulate, thereby can regulate cutoff port according to the requirement of cushion characteristic, to reach best buffering effect; The 3rd; adopting under the situation of travel switch 6; the position on piston rod of the trip switch also can regulate easily, thereby can be according to the position of the rigidity of hydro-pneumatic suspension system itself and damping force characteristics adjustment the trip switch, to play better defencive function.
The groundwork principle of buffering protection type oil gas suspension system of the present invention is described referring to the optimal way shown in Fig. 2:
First, in the time that vehicle is under general driving conditions, oleo-pneumatic suspension oil cylinder fluctuates up and down with damped vibration substantially within the scope of normal compression stretching, now buffer protection device (cutoff port in parallel and the buffering oil circuit that is provided with change-over valve) is inoperative: in the time of compression, the volume of rod chamber 9 expands, and now the fluid of rod end chamber 11 flows into rod chamber 9 by damping hole 3 and check valve 4; In the time stretching, the volume of rod chamber 9 dwindles, and now check valve 4 is closed, and rod chamber fluid only enters rod end chamber 11 by damping hole 3, and while relatively compression, damping increases, thereby plays damping of vibrations.
Second, when driving conditions very severe, when compression stroke is greater than predetermined compression stroke (set safe compression stroke) for avoiding rigid collision, control change-over valve and cut off buffering oil circuit 12, although now check valve 4 is in open mode, the fluid of rod end chamber 11 can flow into rod chamber 9 by damping hole 3 and check valve 4, but because change-over valve is in closed condition, only enter rod end chamber 11 by cutoff port 8 from the fluid of opposite side energy storage (being the right energy storage Fig. 2), can flow into from rod end chamber 11 the also corresponding minimizing of fluid of rod chamber 9, if hanging oil cylinder continues compression, interior can the generation of rod chamber 9 stops the huge negative pressure that continues compression, thereby compression damping is increased rapidly, therefore played actv. buffer protection function.
In addition, the present invention also provides a kind of vehicle, for example engineering truck, and this vehicle comprises the buffering protection type oil gas suspension system of technique scheme of the present invention.
Can be found out by upper description; the advantage of buffering protection type oil gas suspension system of the present invention and vehicle thereof is; cutoff port in parallel 8 and buffering oil circuit 12 are set on the oil circuit that the present invention is communicated with above-mentioned opposite side energy storage 1 by the rod chamber 9 in hanging oil cylinder; under normal condition, cushion oil circuit 12 in connected state; thereby guarantee being communicated with between hanging oil cylinder and energy storage, to realize normal buffer shock-absorbing function.Exceed predetermined compression stroke (the safe compression stroke of setting) once the compression stroke of hanging oil cylinder; to cushion oil circuit by the change-over valve on buffering oil circuit 12 cuts off; thereby make the hydraulic oil in energy storage only can enter by cutoff port 8 rod chamber 9 of hanging oil cylinder; this causes the oil inlet quantity of rod chamber 9 significantly to reduce; if hanging oil cylinder continues compression, can produce the negative pressure that stops hanging oil cylinder to continue compression at the rod chamber of hanging oil cylinder 9; thereby compression damping effect is increased rapidly, play actv. buffer protection function.Like this, even if the driving conditions very severe of vehicle also can be avoided vehicle frame and the hanging oil cylinder generation rigid collision of piston rod 2 with cylinder barrel bottom and the vehicle of hanging oil cylinder effectively, thereby guaranteed the safety and reliability of suspension.The present invention is simple in structure, and oil circuit transformation is relatively easy, has good technology application and promotional value.
Simultaneously, for the vehicle of some use hydro-pneumatic suspension systems, especially large engineering vehicle is bulky, make its working ability improve constantly along with the development of technical merit, thereby bring himself highly more and more higher trend, when being travelled, it there is the good performance of passing through, the most direct effective method by the compression stroke that shortens oleo-pneumatic suspension oil cylinder, but the compression stroke that shortens oleo-pneumatic suspension oil cylinder can make vehicle produce rigid collision under severe driving conditions, the present invention makes hydro-pneumatic suspension system in the time of compression stroke, have buffering protection function, thereby reducing height of car, the compression stroke that makes utilization shorten oleo-pneumatic suspension oil cylinder becomes possibility.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. buffering protection type oil gas suspension system, comprise hanging oil cylinder and both sides energy storage (1), a side energy storage in this both sides energy storage (1) is communicated with the rodless cavity (10) of described hanging oil cylinder, wherein, opposite side energy storage in this both sides energy storage (1) is communicated with the rod chamber (9) of described hanging oil cylinder via cutoff port (8), this cutoff port (8) is parallel with the buffering oil circuit (12) of the rod chamber (9) that is communicated with described opposite side energy storage and described hanging oil cylinder, this buffering oil circuit (12) is provided with the change-over valve for cut off described buffering oil circuit (12) in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke, wherein, described buffering protection type oil gas suspension system also comprises for detection of the travel switch of the compression stroke of described hanging oil cylinder (6), described change-over valve is electric control reversing valve, described travel switch (6) is connected on the circuit of described electric control reversing valve.
2. buffering protection type oil gas suspension system according to claim 1, wherein, described change-over valve is bi-bit bi-pass solenoid directional control valve (7).
3. buffering protection type oil gas suspension system according to claim 1, wherein, described travel switch (6) is approach switch.
4. buffering protection type oil gas suspension system according to claim 3; wherein; described electric control reversing valve for making the electric control reversing valve of described buffering oil circuit (12) conducting under off-position; described travel switch (6) closure in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke; to make the circuit communication of described electric control reversing valve, to the power supply of this electric control reversing valve, described electric control reversing valve obtains electric and cuts off described buffering oil circuit (12).
5. buffering protection type oil gas suspension system according to claim 3; wherein; described electric control reversing valve for making the electric control reversing valve of described buffering oil circuit (12) conducting under "on" position; described travel switch (6) is opened in the time that the compression stroke of described hanging oil cylinder reaches predetermined compression stroke; stop to the power supply of this electric control reversing valve described electric control reversing valve dead electricity and cut off described buffering oil circuit (12) to make the circuitry cuts of described electric control reversing valve.
6. buffering protection type oil gas suspension system according to claim 1; wherein; described hydro-pneumatic suspension system also comprises controller and the sensor for detection of the compression stroke of described hanging oil cylinder; described change-over valve is electric control reversing valve; described controller is electrically connected on described sensor and described change-over valve; described controller receives the compression stroke signal that described sensor transmits, and in the time that described compression stroke is greater than described predetermined compression stroke, controls described change-over valve and cut off described buffering oil circuit (12).
7. buffering protection type oil gas suspension system according to claim 1, wherein, described cutoff port (8) forms by the flow regulating valve being arranged on the oil circuit between the rod chamber (9) of described opposite side energy storage and described hanging oil cylinder.
8. buffering protection type oil gas suspension system according to claim 7, wherein, described flow regulating valve is adjustable throttle valve.
9. buffering protection type oil gas suspension system according to claim 1; wherein; on oil circuit between the rod chamber (9) of described cutoff port (8) and described hanging oil cylinder, be also provided with damping hole in parallel (3) and check valve (4); the forward hydraulic fluid port of this check valve (4) is communicated with described cutoff port (8), and oppositely hydraulic fluid port is communicated with the rod chamber (9) of described hanging oil cylinder.
10. buffering protection type oil gas suspension system according to claim 9, wherein, the piston rod (2) of described hanging oil cylinder is hollow piston rod, the inner chamber of this piston rod is divided into the central oil passage (13) and the rod end chamber (11) that are communicated with the rodless cavity (10) of described hanging oil cylinder, and a described side energy storage is communicated with the rodless cavity (10) of described hanging oil cylinder via described central oil passage (13); On the chamber wall of described rod end chamber (11), be formed with described damping hole (3) and be provided with described check valve (4), described opposite side energy storage is communicated with the rod chamber (9) of described hanging oil cylinder via described rod end chamber (11).
11. vehicles, wherein, the suspension of this vehicle is according to the buffering protection type oil gas suspension system described in any one in claim 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110439521.3A CN102529631B (en) | 2011-12-23 | 2011-12-23 | Buffer protection type oil-gas suspension system and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110439521.3A CN102529631B (en) | 2011-12-23 | 2011-12-23 | Buffer protection type oil-gas suspension system and vehicle |
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| CN102529631A CN102529631A (en) | 2012-07-04 |
| CN102529631B true CN102529631B (en) | 2014-06-18 |
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| CN201110439521.3A Active CN102529631B (en) | 2011-12-23 | 2011-12-23 | Buffer protection type oil-gas suspension system and vehicle |
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| CN106218344B (en) * | 2016-07-26 | 2019-02-15 | 上海瑞尔实业有限公司 | A kind of automobile altitude valve |
| CN110303845A (en) * | 2019-05-31 | 2019-10-08 | 中国北方车辆研究所 | A kind of rocker arm suspension back pressure chamber carrying buffer unit |
| CN111536083A (en) * | 2020-04-29 | 2020-08-14 | 江苏赛欧智能科技有限公司 | Collision buffer control mechanism and method for working arm of greening comprehensive maintenance vehicle |
| CN112874312B (en) * | 2021-03-08 | 2022-08-23 | 中国人民解放军国防科技大学 | Hydraulic lapping device and medium-low speed maglev train |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04243611A (en) * | 1991-01-25 | 1992-08-31 | Nissan Motor Co Ltd | Active type suspension |
| JPH10203128A (en) * | 1997-01-21 | 1998-08-04 | Kayaba Ind Co Ltd | Car height regulating device |
| CN201166082Y (en) * | 2008-03-18 | 2008-12-17 | 湖南三一起重机械有限公司 | Oil gas suspension system |
| CN101623994A (en) * | 2008-07-08 | 2010-01-13 | 贺勍 | Novel air spring rigidity adaptive continuous adjustment system |
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