CN102529631A - 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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- CN102529631A CN102529631A CN2011104395213A CN201110439521A CN102529631A CN 102529631 A CN102529631 A CN 102529631A CN 2011104395213 A CN2011104395213 A CN 2011104395213A CN 201110439521 A CN201110439521 A CN 201110439521A CN 102529631 A CN102529631 A CN 102529631A
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- 239000000725 suspension Substances 0.000 title claims abstract description 83
- 230000006835 compression Effects 0.000 claims abstract description 85
- 238000007906 compression Methods 0.000 claims abstract description 85
- 238000013016 damping Methods 0.000 claims abstract description 26
- 230000003139 buffering effect Effects 0.000 claims description 40
- 238000004146 energy storage Methods 0.000 claims description 39
- 239000012530 fluid Substances 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 152
- 230000000694 effects Effects 0.000 abstract description 5
- 239000010720 hydraulic oil Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001681 protective effect Effects 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
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012467 final product Substances 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
- 230000035939 shock Effects 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 oleo-pneumatic suspension system, particularly, relate to a kind of buffer protection formula oleo-pneumatic suspension system with buffer protection function.In addition, the invention still further relates to a kind of vehicle with said buffer protection formula oleo-pneumatic suspension system.
Background technology
The suspension technology is one of gordian technique of decision vehicle running smoothness; Development of automobile has formed 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 oleo-pneumatic suspension system principle scheme drawing of prior art, wherein, the first, rodless cavity 9 volumes enlarge when compression, and this moment, plunger shaft 10 interior fluid flowed into rodless cavity 9 through damping hole 3 and check valve 4; The second, the volume of rod chamber 9 dwindles when stretching, and this moment, check valve 4 was closed, and the fluid of rod chamber only gets into plunger shaft 10 through damping hole 3, because only through damping hole 3 delivering oils, shock damping action increases during therefore with respect to compression, thereby plays damping of vibrations.In addition, Chinese utility application CN200820005216 also discloses a kind of oleo-pneumatic suspension system, and the oleo-pneumatic suspension system of itself and prior art shown in Figure 1 is similar basically.
The development of vehicle, especially heavy-duty vehicle makes the volume of himself huge day by day; And the road running standard all limits total weight, overall dimensions, the axle load of vehicle; Thereby to having higher requirement of oleo-pneumatic suspension system; Particularly, the oleo-pneumatic suspension system should be when satisfying its cushioning performance the scantling of structure of himself as far as possible little, thereby reduce height of car; Make vehicle that better road driving property arranged, but the stroke that shortens oleo-pneumatic suspension certainly will make vehicle when requiring big stroke vibration damping, have the danger of rigid collision.
Particularly; There is the limit for height requirement in the road vehicle driving process; And the stretching of large engineering vehicle oleo-pneumatic suspension, compression stroke are about 140mm respectively; The stroke of the hanging oil cylinder of oleo-pneumatic suspension system directly influences the height of vehicle; Existing oleo-pneumatic suspension system shortens the compression stroke of hanging oil cylinder in the oleo-pneumatic suspension system usually in order to reduce height of car after, then possibly 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 oleo-pneumatic suspension system.
In view of this, need a kind of later-model oleo-pneumatic suspension of design system, to overcome the above-mentioned defective of prior art.
Summary of the invention
Technical matters to be solved by this invention provides a kind of oleo-pneumatic suspension system; This oleo-pneumatic suspension system can avoid piston rod and the cylinder barrel bottom and the parts generation rigid collision such as hanging oil cylinder and carriage frame of hanging oil cylinder hanging oil cylinder when compression stroke is excessive effectively, thereby guarantees the safety of oleo-pneumatic suspension system.
On this basis, the further technical matters to be solved of the present invention provides a kind of vehicle, and the oleo-pneumatic suspension system of this vehicle can avoid hanging oil cylinder that rigid collision takes place when compression stroke is excessive effectively, thereby prevents that the oleo-pneumatic suspension system is damaged.
In order to solve the problems of the technologies described above; The present invention provides a kind of buffer protection formula oleo-pneumatic suspension system; Comprise hanging oil cylinder and both sides energy storage; Side energy storage in this both sides energy storage is communicated with the rodless cavity of said hanging oil cylinder, and wherein, the opposite side energy storage in this both sides energy storage is communicated with the rod chamber of said hanging oil cylinder via cutoff port; This cutoff port is parallel with the buffering oil circuit that is communicated with said opposite side energy storage and the rod chamber of said hanging oil cylinder, and this buffering oil circuit is provided with the compression stroke that is used in said hanging oil cylinder and reaches the change-over valve that cuts off said buffering oil circuit when being scheduled to compression stroke.
Specifically selectively, said change-over valve is the bi-bit bi-pass solenoid directional control valve.
Preferably, said buffer protection formula oleo-pneumatic suspension system also comprises the travel switch of the compression stroke that is used to detect said hanging oil cylinder, and said change-over valve is an electric control reversing valve, and said travel switch is connected on the circuit of said electric control reversing valve.
Further preferably, said formation switch is near switch.
Specifically selectively; The electric control reversing valve of said electric control reversing valve under off-position, making the conducting of said buffering oil circuit; Said travel switch is closed when the compression stroke of said hanging oil cylinder reaches predetermined compression stroke; So that the circuit communication of said electric control reversing valve and to the power supply of this electric control reversing valve, said electric control reversing valve gets electric and cuts off said buffering oil circuit.
Specifically select as another kind; The electric control reversing valve valve of said electric control reversing valve under "on" position, making the conducting of said buffering oil circuit; Said travel switch is opened when the compression stroke of said hanging oil cylinder reaches predetermined compression stroke; So that the circuitry cuts of said electric control reversing valve and stopping to the power supply of this electric control reversing valve, said electric control reversing valve dead electricity and cut off said buffering oil circuit.
Selectively; Said oleo-pneumatic suspension system also comprises the sensor of controller and the compression stroke that is used to detect said hanging oil cylinder;, said change-over valve is an electric control reversing valve, said controller is electrically connected on said sensor and said change-over valve; Said controller receives the compression stroke signal that said sensor transmits, and controls said change-over valve at said compression stroke during greater than said predetermined compression stroke and cut off said buffering oil circuit.
Particularly, said cutoff port forms through the flow regulating valve on the oil circuit between the rod chamber that is arranged on said opposite side energy storage and said hanging oil cylinder.
Preferably, said flow regulating valve is adjustable flow regulating valve.
Particularly, also be provided with parallelly connected damping hole and check valve on the oil circuit between the rod chamber of said cutoff port and said hanging oil cylinder, the forward hydraulic fluid port of this check valve is communicated with said cutoff port, and reverse hydraulic fluid port is communicated with the rod chamber of said hanging oil cylinder.
More specifically; The piston rod of said hanging oil cylinder is a hollow piston rod; The inner chamber of this piston rod is divided into central oil passage and the rod end chamber that is communicated with the rodless cavity of said hanging oil cylinder, and a said side energy storage is communicated with the rodless cavity of said hanging oil cylinder via said central oil passage; Be formed with said damping hole on the chamber wall of said rod end chamber and be provided with said check valve, said opposite side energy storage is communicated with the rod chamber of said hanging oil cylinder via said rod end chamber.
On the basis of above-mentioned buffer protection formula oleo-pneumatic suspension system, the present invention also provides a kind of vehicle, and wherein, the suspension of this vehicle is according to each described buffer protection formula oleo-pneumatic suspension system of technique scheme.
Pass through technique scheme; Buffer protection formula oleo-pneumatic suspension system of the present invention and vehicle thereof are through being provided with the cutoff port and buffering oil circuit of parallel connection on the rod chamber of hanging oil cylinder and oil circuit that energy storage is communicated with; The buffering oil circuit is in connected state under normal condition; Thereby guarantee being communicated with between hanging oil cylinder and the energy storage, to realize normal buffer shock-absorbing function.In case the compression stroke of hanging oil cylinder surpasses predetermined compression stroke when compression stroke (promptly set safe); To cushion oil circuit through the change-over valve on the buffering oil circuit cuts off; Thereby make the hydraulic oil in the energy storage only can get into the rod chamber of hanging oil cylinder through cutoff port; This causes the oil inlet quantity of rod chamber significantly to reduce; Can produce the negative pressure that stops hanging oil cylinder to continue compression at the rod chamber of hanging oil cylinder if hanging oil cylinder continues compression, thereby make the compression damping effect increase rapidly, play the efficient buffer protective effect.Like this, even the driving conditions very severe of vehicle also can be avoided the vehicle frame and the hanging oil cylinder generation rigid collision of piston rod and the cylinder barrel bottom and the vehicle of hanging oil cylinder effectively, thereby the safety and the reliability of suspension have been guaranteed.The present invention is simple in structure, and the oil circuit transformation is relatively easy, has good technical application and promotional value.
Other features and advantages of the present invention will partly specify in the specific embodiment subsequently.
Description of drawings
Attached drawings is used to provide further understanding of the present invention, and constitutes the part of specification sheets, and it is used to explain the present invention with the following specific embodiment, but protection scope of the present invention is not limited to the following accompanying drawing and the specific embodiment.In the accompanying drawings:
Fig. 1 is the principle schematic of the oleo-pneumatic suspension system of prior art.
Fig. 2 is the principle schematic of the oleo-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
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention, should be understood that, the specific embodiment described herein only is used for explanation and explains the present invention, and protection scope of the present invention is not limited to the following specific embodiment.
Referring to shown in Figure 1; Buffer protection formula oleo-pneumatic suspension of the present invention system comprises hanging oil cylinder and both sides energy storage 1; Side energy storage in the both sides energy storage 1 is communicated with the rodless cavity 10 of said hanging oil cylinder; The opposite side energy storage is communicated with the rod chamber 9 of said hanging oil cylinder via cutoff port 8; This cutoff port 8 is parallel with the buffering oil circuit 12 that is communicated with said opposite side energy storage and the rod chamber 9 of said hanging oil cylinder, and this buffering oil circuit 12 is provided with and cuts off the change-over valve valve (preferably electric control reversing valve) that cushions oil circuit 12 when the compression stroke that is used in said hanging oil cylinder reaches predetermined compression stroke.
In the basic technical scheme of above-mentioned oleo-pneumatic suspension system; The major technique design of oleo-pneumatic suspension of the present invention system is to make the 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 be parallel with the compression stroke that is used in said hanging oil cylinder when reaching predetermined compression stroke cut-out cushion the change-over valve of oil circuit 12.In addition, apparently, the hydraulic structure of the oleo-pneumatic suspension system that the present invention is shown in Figure 2 is similar with conventional oleo-pneumatic suspension system (referring to Fig. 1).For example; In order further to improve the damping cushion effect of oleo-pneumatic suspension system; The present invention oleo-pneumatic suspension system shown in Figure 2 also can adopt damping hole 3 and check valve 4, and particularly, the oil circuit between the rod chamber 9 of cutoff port 8 and hanging oil cylinder is provided with parallelly connected damping hole 3 and check valve 4; The forward hydraulic fluid port of this check valve 4 is communicated with said cutoff port 8, and reverse hydraulic fluid port is communicated with the rod chamber 9 of said hanging oil cylinder.On concrete structure; The piston rod of said hanging oil cylinder can be hollow piston rod; The inner chamber of this piston rod is divided into the central oil passage 13 and rod end chamber 11 that is communicated with the rodless cavity 10 of hanging oil cylinder; A wherein above-mentioned side energy storage is communicated with the rodless cavity 10 of hanging oil cylinder via central oil passage 13, is formed with said damping hole 3 on the chamber wall of rod end chamber 11 and is provided with check valve 4, and 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 only is a typical structure with the structure that specifically is provided with of check valve 4, and it is provided with form can be diversified, is not limited to characteristic form shown in Figure 2.
Relevant preferred implementation and the simple variant embodiment thereof of technical conceive with buffer protection formula oleo-pneumatic suspension of the present invention system below described.
Referring to shown in Figure 2, buffering oil circuit 12 is provided with change-over valve and cuts off buffering oil circuit 12 to be used for when needed when reaching predetermined compression stroke (be the compression stroke of hanging oil cylinder).For the technical personnel of Hydraulic Field, can realize that the change-over valve of this oil circuit cut-out function is varied, for example electric control reversing valve such as electromagnetic switch valve, electric-controlled switch valve.Shown in Figure 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, only is that wherein some interfaces need not to connect.Electric control reversing valve can also be replaced by other change-over valves such as pilot operated valve device or pneumatic valve, and just its mode is different, and this is obvious to those skilled in the art.
In above-mentioned basic technical scheme, change-over valve cuts off said buffering oil circuit 12 when the compression stroke of hanging oil cylinder reaches predetermined compression stroke.This can diversified technical measures realize; The most simply; Chaufeur can be when the road conditions of going be relatively abominable manually the control change-over valve cut off buffering oil circuit 12, make only to be communicated with the oil inlet quantity of the rod chamber of minimizing hanging oil cylinder between the rod chamber of energy storage and hanging oil cylinder through cutoff port 8.Certainly, adopt can the automatically controlled technical measures in oleo-pneumatic suspension of the present invention system.
For example, particularly, above-mentioned change-over valve adopts electric control reversing valve; Buffer protection formula oleo-pneumatic suspension of the present invention system also comprises travel switch 6; Preferably, the trip switch 6 is that the trip switch 6 is connected on the circuit of said change-over valve near switch (being the non-contact type travel switch); And be arranged on the desired location of piston rod of said hanging oil cylinder, for example on the bar head of piston rod.Adopt under the said situation at travel switch 6 near switch; The position that is provided with near switch can be various; Be installed on the piston rod and be not limited to; For example be installed on the cylinder barrel, be installed near the position the hanging oil cylinder, detect the position of piston rod with respect to cylinder barrel as long as can play through support.Travel switch 6 of the present invention is under the said situation near switch, said near the relative distance of switch cylinder barrel through sensing and said hanging oil cylinder when the compression stroke of said hanging oil cylinder reaches predetermined compression stroke the change-over switch state.In technical conceive scope of the present invention; Travel switch 6 also can adopt common mechanical contact-type travel switch; Under this situation; This mechanical contact-type travel switch can be arranged on the piston rod, and the cylinder barrel 5 with this hanging oil cylinder when reaching predetermined compression stroke with the compression stroke in said hanging oil cylinder collides and the change-over switch state.That is to say; Predetermined compression stroke is corresponding to the safe compression stroke of hanging oil cylinder; When piston rod is withdrawn into this desired location; If hanging oil cylinder continues compression, then the vehicle frame of the piston rod of hanging oil cylinder and cylinder barrel 5 bottoms and vehicle etc. has the danger with the hanging oil cylinder rigid collision, therefore the general safe compression stroke of hanging oil cylinder just of described predetermined compression stroke; This can be by the total compression travel settings of those skilled in the art according to hanging oil cylinder, and the total compression stroke that is generally less than hanging oil cylinder gets final product.Under this embodiment; Can have two kinds form specifically is set: first; Referring to shown in Figure 3, change-over valve can be the electric control reversing valve that under off-position, makes 12 conductings of buffering oil circuit, and travel switch 6 is closed when the compression stroke of hanging oil cylinder reaches predetermined compression stroke; So that the circuit communication of change-over valve and to the power supply of this change-over valve, change-over valve gets electric (spool of bi-bit bi-pass reversing solenoid valve 7 for example shown in Figure 3 moves to rest position) and cut off said buffering oil circuit 12.Second; Change-over valve also can be the electric control reversing valve that under "on" position, makes 12 conductings of buffering oil circuit; Travel switch 6 is opened when the compression stroke of hanging oil cylinder reaches predetermined compression stroke; So that the circuitry cuts of change-over valve and stopping to the power supply of this change-over valve; Change-over valve dead electricity and cut off buffering oil circuit 12, for example in Fig. 3 as long as 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 normally closed bi-bit bi-pass solenoid directional control valve energising and keep 12 connections of buffering oil circuit under the normal circumstances; In case this normally closed bi-bit bi-pass solenoid directional control valve cuts off the power supply then spool is moved to rest position in action of the spring, thereby cut off buffering oil circuit 12.
For another example; Oleo-pneumatic suspension of the present invention system can comprise the sensor of controller and the compression stroke that is used to detect said hanging oil cylinder; Said change-over valve adopts electric control reversing valve; Said controller is electrically connected on sensor and said electric control reversing valve, and controller receives the compression stroke signal that said sensor transmits, and controls said change-over valve at said compression stroke during greater than above-mentioned predetermined compression stroke and cut off said buffering oil circuit 12.This form of implementation need be controlled change-over valve by means of controller; And sensor only detects the compression stroke of hanging oil cylinder and do not play control change-over valve circuit; As the selectable form of implementation in the technical conceive scope of the present invention, it also belongs to protection scope of the present invention.Said sensor generally can adopt displacement pickup; For example inductive pickoff, capacitance-type sensor or electro-optical pickoff; It is provided with the position and can confirms according to installation situation; Change as long as can detect the piston rod of hanging oil cylinder and the relative position of cylinder barrel effectively, for example typically can be arranged on piston rod or the cylinder barrel.
In addition; Cutoff port 8 can form through various ways; For example it can be formed directly on the hydraulic oil pipe of the formation oil circuit between energy storage and the hanging oil cylinder rod chamber 9; Preferably, cutoff port 8 forms through the flow regulating valve on the oil circuit between the rod chamber 9 that is arranged on above-mentioned opposite side energy storage and hanging oil cylinder.More preferably, this flow regulating valve is adjustable flow regulating valve, and this flow regulating valve in-to-in cutoff port 8 also is adjustable like this, and this can regulate the throttling flow of cutoff port 8 according to application need.
Description through the above-mentioned specific embodiment; The major technique of oleo-pneumatic suspension of the present invention system is characterised in that: first; On the oil circuit between the rod chamber 9 of above-mentioned opposite side energy storage and hanging oil cylinder, form buffer protection through cutoff port and the buffering oil circuit that is provided with change-over valve, work as vehicle, for example engineering truck is under abominable driving conditions; The oleo-pneumatic suspension compression stroke plays buffer protection function when excessive, thereby avoids the rigidity contact; The second, preferably, the throttle opening of cutoff port 8 can be regulated, thereby can regulate cutoff port according to the requirement of cushion characteristic, to reach best buffering effect; The 3rd; Under the situation that adopts travel switch 6; The position on piston rod of the trip switch also can be regulated easily, thereby can be according to the rigidity of oleo-pneumatic suspension system itself and the position of damping force characteristics adjustment the trip switch, to play the better protection function.
Following reference optimal way shown in Figure 2 is described the groundwork principle of buffer protection formula oleo-pneumatic suspension of the present invention system:
First; When vehicle in general driving conditions following time; The oleo-pneumatic suspension oil cylinder fluctuates up and down with damped vibration in normal compression stretching scope basically; Buffer protection device this moment (cutoff port of parallel connection and the buffering oil circuit that is provided with change-over valve) is inoperative: the volume of rod chamber 9 enlarges when compression, and this moment, the fluid of rod end chamber 11 flowed into rod chamber 9 through damping hole 3 and check valve 4; The volume of rod chamber 9 dwindles when stretching, and this moment, check valve 4 was closed, and rod chamber fluid only advances rod end chamber 11 through damping hole 3, and damping increases when compressing relatively, thereby plays damping of vibrations.
The second, when the driving conditions very severe, compression stroke during greater than predetermined compression stroke (the safe compression stroke of promptly setting) for avoiding rigid collision; The control change-over valve cuts off buffering oil circuit 12; Though this moment, check valve 4 was in open mode, the fluid of rod end chamber 11 can flow into rod chamber 9 through damping hole 3 and check valve 4, because of change-over valve is in closed condition; Only get into rod end chamber 11 from the fluid of opposite side energy storage (being the right energy storage Fig. 2) through cutoff port 8; The also corresponding minimizing of fluid of rod chamber 9 can be flowed into from rod end chamber 11,, then the huge negative pressure that stops the continuation compression can be produced in the rod chamber 9 if hanging oil cylinder continues to compress; Thereby compression damping is increased rapidly, therefore played the efficient buffer protective effect.
In addition, the present invention also provides a kind of vehicle, engineering truck for example, and this vehicle comprises the buffer protection formula oleo-pneumatic suspension system of technique scheme of the present invention.
Can find out by last description; The advantage of buffer protection formula oleo-pneumatic suspension system of the present invention and vehicle thereof is; The present invention is through being provided with the cutoff port 8 and buffering oil circuit 12 of parallel connection on the rod chamber 9 of hanging oil cylinder and oil circuit that above-mentioned opposite side energy storage 1 is communicated with; Buffering oil circuit 12 is in connected state under normal condition, thereby guarantees being communicated with between hanging oil cylinder and the energy storage, to realize normal buffer shock-absorbing function.In case the compression stroke of hanging oil cylinder surpasses predetermined compression stroke when compression stroke (promptly set safe); To cushion oil circuit through the change-over valve on the buffering oil circuit 12 cuts off; Thereby make the hydraulic oil in the energy storage only can get into the rod chamber 9 of hanging oil cylinder through cutoff port 8; This causes the oil inlet quantity of rod chamber 9 significantly to reduce; Can produce the negative pressure that stops hanging oil cylinder to continue compression at the rod chamber 9 of hanging oil cylinder if hanging oil cylinder continues compression, thereby make the compression damping effect increase rapidly, play the efficient buffer protective effect.Like this, even the driving conditions very severe of vehicle also can be avoided the vehicle frame and the hanging oil cylinder generation rigid collision of piston rod 2 with the cylinder barrel bottom and the vehicle of hanging oil cylinder effectively, thereby the safety and the reliability of suspension have been guaranteed.The present invention is simple in structure, and the oil circuit transformation is relatively easy, has good technical application and promotional value.
Simultaneously; For some vehicles that uses the oleo-pneumatic suspension system, especially large engineering vehicle is bulky, and its working ability is improved constantly; Thereby bring himself highly increasingly high trend; Having good through performance when it is gone, is the most direct effective method through the compression stroke that shortens the oleo-pneumatic suspension oil cylinder, but the compression stroke that shortens the oleo-pneumatic suspension oil cylinder can make vehicle in abominable driving conditions generation rigid collision down; The present invention makes the oleo-pneumatic suspension system when compression stroke, have the buffer protection function, becomes possibility thereby the compression stroke that makes utilization shorten the oleo-pneumatic suspension oil cylinder reduces height of car.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned embodiment; In technical conceive scope 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.
Need to prove that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up through any suitable manner.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 the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (12)
1. buffer protection formula oleo-pneumatic suspension system; Comprise hanging oil cylinder and both sides energy storage (1); Side energy storage in this both sides energy storage (1) is communicated with the rodless cavity (10) of said hanging oil cylinder; Wherein, Opposite side energy storage in this both sides energy storage (1) is communicated with the rod chamber (9) of said hanging oil cylinder via cutoff port (8), and this cutoff port (8) is parallel with the buffering oil circuit (12) that is communicated with said opposite side energy storage and the rod chamber (9) of said hanging oil cylinder, and this buffering oil circuit (12) is provided with the compression stroke that is used in said hanging oil cylinder and reaches the change-over valve that cuts off said buffering oil circuit (12) when being scheduled to compression stroke.
2. buffer protection formula oleo-pneumatic suspension according to claim 1 system, wherein, said change-over valve is bi-bit bi-pass solenoid directional control valve (7).
3. buffer protection formula oleo-pneumatic suspension according to claim 1 system; Wherein, Said buffer protection formula oleo-pneumatic suspension system also comprises the travel switch (6) of the compression stroke that is used to detect said hanging oil cylinder; Said change-over valve is an electric control reversing valve, and said travel switch (6) is connected on the circuit of said electric control reversing valve.
4. buffer protection formula oleo-pneumatic suspension according to claim 3 system, wherein, said travel switch (6) is near switch.
5. buffer protection formula oleo-pneumatic suspension according to claim 4 system; Wherein, The electric control reversing valve of said electric control reversing valve under off-position, making said buffering oil circuit (12) conducting; Said travel switch (6) is closed when the compression stroke of said hanging oil cylinder reaches predetermined compression stroke, so that the circuit communication of said electric control reversing valve and to this electric control reversing valve power supply, said electric control reversing valve gets electric and cuts off said buffering oil circuit (12).
6. buffer protection formula oleo-pneumatic suspension according to claim 4 system; Wherein, The electric control reversing valve of said electric control reversing valve under "on" position, making said buffering oil circuit (12) conducting; Said travel switch (6) is opened when the compression stroke of said hanging oil cylinder reaches predetermined compression stroke, so that the circuitry cuts of said electric control reversing valve and stopping to this electric control reversing valve power supply, and said electric control reversing valve dead electricity and cut off said buffering oil circuit (12).
7. buffer protection formula oleo-pneumatic suspension according to claim 1 system; Wherein, Said oleo-pneumatic suspension system also comprises the sensor of controller and the compression stroke that is used to detect said hanging oil cylinder, and said change-over valve is an electric control reversing valve, and said controller is electrically connected on said sensor and said change-over valve; Said controller receives the compression stroke signal that said sensor transmits, and controls said change-over valve at said compression stroke during greater than said predetermined compression stroke and cut off said buffering oil circuit (12).
8. buffer protection formula oleo-pneumatic suspension according to claim 1 system, wherein, said cutoff port (8) forms through the flow regulating valve on the oil circuit between the rod chamber (9) that is arranged on said opposite side energy storage and said hanging oil cylinder.
9. buffer protection formula oleo-pneumatic suspension according to claim 8 system, wherein, said flow regulating valve is adjustable flow regulating valve.
10. buffer protection formula oleo-pneumatic suspension according to claim 1 system; Wherein, Also be provided with parallelly connected damping hole (3) and check valve (4) on the oil circuit between the rod chamber (9) of said cutoff port (8) and said hanging oil cylinder; The forward hydraulic fluid port of this check valve (4) is communicated with said cutoff port (8), and reverse hydraulic fluid port is communicated with the rod chamber (9) of said hanging oil cylinder.
11. buffer protection formula oleo-pneumatic suspension according to claim 10 system; Wherein, The piston rod of said hanging oil cylinder (2) is a hollow piston rod; The inner chamber of this piston rod is divided into central oil passage (13) and the rod end chamber (11) that is communicated with the rodless cavity (10) of said hanging oil cylinder, and a said side energy storage is communicated with the rodless cavity (10) of said hanging oil cylinder via said central oil passage (13); Be formed with said damping hole (3) on the chamber wall of said rod end chamber (11) and be provided with said check valve (4), said opposite side energy storage is communicated with the rod chamber (9) of said hanging oil cylinder via said rod end chamber (11).
12. vehicle, wherein, the suspension of this vehicle is according to each described buffer protection formula oleo-pneumatic suspension system in the claim 1 to 11.
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 true CN102529631A (en) | 2012-07-04 |
| CN102529631B 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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| CN (1) | CN102529631B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106218344A (en) * | 2016-07-26 | 2016-12-14 | 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 |
| CN112874312A (en) * | 2021-03-08 | 2021-06-01 | 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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| 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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| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106218344A (en) * | 2016-07-26 | 2016-12-14 | 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 |
| CN112874312A (en) * | 2021-03-08 | 2021-06-01 | 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 | Publication date |
|---|---|
| CN102529631B (en) | 2014-06-18 |
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