CN102392867A - Air spring adjusting static stiffness and dynamic stiffness through volume and displacement and having pressure-limiting and impact-reducing functions - Google Patents
Air spring adjusting static stiffness and dynamic stiffness through volume and displacement and having pressure-limiting and impact-reducing functions Download PDFInfo
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- CN102392867A CN102392867A CN201110192140XA CN201110192140A CN102392867A CN 102392867 A CN102392867 A CN 102392867A CN 201110192140X A CN201110192140X A CN 201110192140XA CN 201110192140 A CN201110192140 A CN 201110192140A CN 102392867 A CN102392867 A CN 102392867A
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Abstract
The invention discloses an air spring adjusting static stiffness and dynamic stiffness through volume and displacement and having pressure-limiting and impact-reducing functions, and the air spring is designed to improve smoothness and comfortability of a vehicle and protect a road and goods. For the matching type of the static stiffness characteristic of the air spring, people ignore the adjustment static rigidity required for the difference of an optional standard series gasbag rigidity and specific vehicle type requiring rigidity. The static rigidity of the gasbag is mismatched so as to cause an adjusting difficulty of dynamic stiffness; in a passive air suspension system, the mismatching static rigidity of the gasbag is an important reason of the seriously side sway in the vehicle operation; in the existing dynamic stiffness adjustment, a main air chamber and an auxiliary air chamber are connected, a throttling port on a channel is adjusted to change differential pressure between the main air chamber and the auxiliary air chamber when gas flows; and a rigidity regulating system does not change the volume of the air chambers in an adjustment process, and the rigidity adjustive difficulty is large. The air spring is a novel spring aims at these problems, the air spring provided by the invention has the advantages that the static stiffness is adjustable, the structure is simple, the cost is cheap, and the air spring is convenient and practical.
Description
One, technical field:
The present invention relates to a kind of vehicle air suspension and use pneumatic spring; This quiet rigidity volume adjustment dynamic stiffness is regulated with displacement and is added pressure limiting and subtract the combination pneumatic spring that dashes and especially be adapted to the carrying big bus; The city bus big bus; Also be adapted to shipping truck and rail traffic vehicles, and special vehicle and limousine.
Two, background technique:
In order to improve ride of vehicle, improve the travelling comfort of taking, alleviate the damage of vehicle to road and goods, developed country has adopted pneumatic spring widely in the suspension system of its carrier vehicle.China recent years is also being widelyd popularize and mandatory employing pneumatic spring.In the pneumatic spring technology of constantly development, in order further to improve the rigidity control characteristic of pneumatic spring, more be applicable to the variation of car load in order to it, people have carried out deep exploration.In the rigidity of pneumatic spring was regulated, people had ignored owing to optional standard series air bag rigidity and the static stiffness that concrete vehicle requires the difference of rigidity to need are regulated.And often because the difficulty that the static stiffness of air bag does not match and caused its dynamic rate to regulate.In the passive type airsuspension system then the static stiffness of air bag not match be to cause the serious major reason of side-sway in the vehicle operating.In the active air suspension system; At present the technology of comparative maturity is that air chamber with pneumatic spring is divided into major and minor air chamber; Pressure reduction when realizing gas flow between the major-minor air chamber through the aperture of controlling the throttle valve on the connecting passage between major and minor air chamber changes, and reaches the rigidity that changes pneumatic spring.The control signal of this rigidity regulating system is by the multiple sensor collection, and deliver and send control command after microprocessor is handled, by the aperture that actuator regulates throttle valve, the rigidity that the pressure reduction when regulating gas flow between the major-minor air chamber is regulated pneumatic spring.Its main deficiency at first is: the signal of system is comparatively numerous and diverse to carrying out from collecting treatment, and its cost is too high, can only be applied on the luxurious vehicle of only a few.Secondly, the response time lag is big.The control of rigidity segmented is generally adopted in control in the rigidity of the airsuspension system air spring of semi-active suspension, with the rigidity of pneumatic spring be divided into soft, hard two retainings or soft, in, hard three retainings.The air spring rigidity control of this rigidity regulating system is to select control through the driver's operation solenoid valve, and the restriction aperture is large, medium and small between corresponding respectively connection major-minor air chamber.The adjusting of this rigidity is not continuous.
Three, summary of the invention:
The object of the invention will be developed a kind of low cost exactly; Simple and reliable, responding fast can regulate quiet rigidity; Can regulate dynamic stiffness automatically again, can also when the wheel in service of vehicle is run into projection, reduce rigidity automatically, reduce the combination pneumatic spring of road surface projection the impact of vehicle body.
Solution of the present invention is: pneumatic spring is by air bag 1, upper mounting plate 2, and accessory air-space 3, removable cover 4, spring 5, push rod 6, lower installation board 7, piston 8, adjusting screw rod 9, locking nut 10 combines with one-way valve 11; The fixing push rod 6 in the inner plane central position of upper mounting plate 2; With the inner plane centralized positioning of lower installation board 7, fixing accessory air-space 3 that is separated into several sub-air chamber, the outside suit of accessory air-space 3 internal diameter and accessory air-space 3 external diameters removable cover 4 movingly; The top of removable cover 4 has aperture to be communicated with air bag 1; The last cover cavity of the top of accessory air-space 3 and removable cover 4 is equipped with spring 5, and under the effect of spring 5, removable cover 4 contacts and moves up and down with it with push rod 6 all the time.In the cavity volume of accessory air-space 3 foots piston 8 is housed, adjusting screw rod 9 is contained on the lower installation board 7, and its top withstands on the bottom plane of piston 8, and the lower plane of lower installation board 7 is stretched out in the bottom, and leaves the length of adjustment stroke; Locking nut 10 is contained in the bottom of adjusting screw rod 9.One-way valve 11 is installed on sub-air chamber's sidewall of the bottom of accessory air-space 3, and is communicated with by the spring chamber of the aperture on its sidewall with one-way valve 11; The one-way valve 11 that number equates also can be installed on the dividing plate of each sub-air chamber, and be communicated with by the spring chamber of the aperture on its dividing plate with one-way valve 11; The quiet rigidity of pneumatic spring is regulated: unclamp locking nut 10, turn adjusting screw rod 9, piston 8 is moved up, just reduced the gas actual volume in the air bag 1, improved the quiet rigidity of pneumatic spring; Otherwise, just reduced the quiet rigidity of pneumatic spring; Adjustment is tightened locking nut 10 after finishing; The dynamic stiffness of pneumatic spring is regulated: when vehicle is in setting height; Removable cover 4 is minimum with the axial suit length of accessory air-space 3; The radially throttle orifice of each sub-air chamber of accessory air-space 3 all communicates with air bag 1, and the rigidity of pneumatic spring is by determining according to the inflation pressure of load request and the air actual volume in the air bag 1 in the air bag 1; When vehicle dynamic load increase at the volley, upper mounting plate 2 moves down under the effect of dynamic load, and push rod 6 can move down thereupon; Promoting removable cover 4 moves down; Turn down successively accessory air-space 3 each sub-air chamber restriction with close each sub-air chamber of accessory air-space 3, pressure reduction and the actual volume that reduces in the air bag 1 when improving air bag 1, the rigidity of raising pneumatic spring with 3 gas flow of accessory air-space; The dynamic load of balance vehicle body stops the inclination of vehicle body and leans forward and swing back.When wheel is run into the road surface projection, impact for step of wheel, the air pressure that will inevitably cause in the air bag 1 produces step.The pressure reduction that this step pressure and accessory air-space 3 nethermost two sub-air chamber's internal air pressures form can be opened one-way valve 11; Rapid communicated air bags 1 and accessory air-space 3 nethermost two sub-air chamber; Increased the available gas volume in the air bag 1; Reduce the rigidity of pneumatic spring, reduce of the impact of road surface projection, improve occupant's the travelling comfort and the smoothness of vehicle vehicle body.
Control signal of the present invention is directly taken from the compression displacement and the step pressure of air bag 1, and control signal and regulating command are integrated, and effect rapidly, does not reliably have the response time lag, and the rigidity regulating power of pneumatic spring greatly improves; After having guaranteed the low vibration frequency characteristic of pneumatic spring, through the load-deflection curve that sub-air chamber that not isometric sub-air chamber and number do not wait can improve pneumatic spring effectively is set.Because control signal and regulating command are integrated, need not to have again the acquisition processing system and the actuator of signal, need not ECU and control software, cost greatly descends.
For making things convenient for the present invention's accurate adjustment in use, push rod 6 can be designed to regulate the structural type of height up and down, so that the position to axial of adjustment accessory air-space 3 and removable cover 4.Also can spring 5 be designed to extension spring, be fixed on the inner plane of loam cake plane and upper mounting plate 2 of removable cover 4.
Four, description of drawings:
Accompanying drawing 1 is a structure principle chart of the present invention.
Five, embodiment:
Embodiment of the present invention is: the quiet rigidity of pneumatic spring is regulated: unclamp locking nut 10, turn adjusting screw rod 9, piston 8 is moved up, just reduced the gas actual volume in the air bag 1, improved the quiet rigidity of pneumatic spring; Otherwise, just reduced the quiet rigidity of pneumatic spring; Adjustment is tightened locking nut 10 after finishing; The dynamic stiffness of pneumatic spring is regulated: when vehicle is in setting height; Removable cover 4 is minimum with the axial suit length of accessory air-space 3; The radially throttle orifice of each sub-air chamber of accessory air-space 3 all communicates with air bag 1, and the rigidity of pneumatic spring is by determining according to the inflation pressure of load request and the air actual volume in the air bag 1 in the air bag 1; When vehicle dynamic load increase at the volley, the upper mounting plate 2 of air bag 1 moves down under the effect of dynamic load; Push rod 6 can move down thereupon; Promote removable cover 4 and move down, turn down successively accessory air-space 3 each sub-air chamber restriction and close each sub-air chamber of accessory air-space 3 successively, pressure reduction and the rigidity that reduces the actual volume raising pneumatic spring in the air bag 1 when improving air bag 1 with 3 gas flow of accessory air-space; The dynamic load of balance vehicle body stops the inclination of vehicle body and leans forward and swing back.Run into the road surface projection when the vehicle wheel that is in operation, impact for step of wheel, the air pressure that will inevitably cause in the air bag 1 produces step.The pressure reduction that this step pressure and accessory air-space 3 nethermost two sub-air chamber's internal air pressures form can be opened one-way valve 11; Rapid communicated air bags 1 and accessory air-space 3 nethermost two sub-air chamber; Increased the available gas volume in the air bag 1; Reduce the rigidity of pneumatic spring, reduce of the impact of road surface projection, improve occupant's the travelling comfort and the smoothness of vehicle vehicle body.
Claims (6)
1. volume and displacement are regulated quiet dynamic stiffness and are added pressure limiting and subtract the pneumatic spring that dashes; By air bag (1), upper mounting plate (2), accessory air-space (3), removable cover (4), spring (5), push rod (6), lower installation board (7), piston (8); Adjusting screw rod (9), locking nut (10) and one-way valve (11) combine; It is characterized in that: fixing push rod (6) in the central position of the inner plane of upper mounting plate (2); Central position fixed joint air chamber (3) on the last plane of lower installation board (7); The outside suit of accessory air-space (3) internal diameter and accessory air-space (3) external diameter removable cover (4) movingly; The last cover cavity of the top of accessory air-space (3) and removable cover (4) is equipped with spring (5), and under the effect of spring (5), removable cover (4) contacts and moves up and down with it with push rod (6) all the time; Piston (8) is housed in the orlop cavity volume of accessory air-space (3), and adjusting screw rod (9) is contained on the central position of lower installation board (7), and its upper end heads on the bottom plane of piston (8), and the lower plane of lower installation board (7) is stretched out in the lower end, and leaves adjusting length; Locking nut (10) is contained in the bottom of adjusting screw rod (9), with the lower plane locking of lower installation board (7), prevents that adjusting screw rod (9) is loosening; One-way valve (11) is installed on sub-air chamber's sidewall of the bottom of accessory air-space (3), and is communicated with by the spring chamber of the aperture on its sidewall with one-way valve (11); The quiet rigidity of pneumatic spring is regulated: unclamp locking nut (10), turn adjusting screw rod (9), piston (8) is moved up, just reduced the gas actual volume in the air bag (1), improved the quiet rigidity of pneumatic spring; Otherwise, just reduced the quiet rigidity of pneumatic spring; The dynamic stiffness of pneumatic spring is regulated: when vehicle was in setting height, the rigidity of pneumatic spring was determined by gas pressure and the air actual volume in the air bag (1) according to load request in the air bag (1); When vehicle dynamic load at the volley increases; The upper mounting plate (2) of air bag (1) moves down under the effect of dynamic load, and push rod (6) moves down thereupon, promotes removable cover (4) and moves down; Turn down successively accessory air-space (3) each sub-air chamber restriction with close each sub-air chamber of accessory air-space (3); Improve the dynamic rate of pneumatic spring, the dynamic load of balance vehicle body stops the inclination of vehicle body; When the vehicle wheel that is in operation is run into the road surface projection; Impact for step of wheel; The air pressure that will inevitably cause in the air bag (1) produces step, and the pressure reduction that nethermost two the sub-air chamber's internal air pressures of this step pressure and accessory air-space (3) form can be opened one-way valve (11), rapidly communicated air bags (1) and nethermost two sub-air chamber of accessory air-space (3); Increased the available gas volume in the air bag (1); Reduce the rigidity of pneumatic spring, reduce of the impact of road surface projection, improve occupant's the travelling comfort and the smoothness of vehicle vehicle body.
2. a kind of volume according to claim 1 and displacement are regulated quiet dynamic stiffness and added pressure limiting and subtract the pneumatic spring that dashes, and it is characterized in that: the volume of the independent sub-air chamber of accessory air-space (3) can change according to the different demands of different automobile types to its air spring rigidity change curve with number.
3. a kind of volume according to claim 1 and displacement are regulated quiet dynamic stiffness and are added pressure limiting and subtract the pneumatic spring that dashes, and it is characterized in that: push rod (6) and upper mounting plate (2) are made into one.
4. a kind of volume according to claim 1 and displacement are regulated quiet dynamic stiffness and are added pressure limiting and subtract the pneumatic spring that dashes; It is characterized in that: spring (5) is designed to extension spring, and its two ends are separately fixed on the inner plane of upper mounting plate (2) on the plane, top with removable cover (4).
5. a kind of volume according to claim 1 and displacement are regulated quiet dynamic stiffness and are added pressure limiting and subtract the pneumatic spring that dashes; It is characterized in that: push rod (6) is designed to regulate the structural type of height up and down, so that the position to axial of adjustment accessory air-space (3) and removable cover (4).
6. a kind of volume according to claim 1 and displacement are regulated quiet dynamic stiffness and are added pressure limiting and subtract the pneumatic spring that dashes; It is characterized in that: the one-way valve 11 that number equates is installed on the dividing plate of each sub-air chamber, and is communicated with by the spring chamber of the aperture on its dividing plate with one-way valve 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110192140XA CN102392867A (en) | 2011-07-12 | 2011-07-12 | Air spring adjusting static stiffness and dynamic stiffness through volume and displacement and having pressure-limiting and impact-reducing functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110192140XA CN102392867A (en) | 2011-07-12 | 2011-07-12 | Air spring adjusting static stiffness and dynamic stiffness through volume and displacement and having pressure-limiting and impact-reducing functions |
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| CN102392867A true CN102392867A (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110192140XA Pending CN102392867A (en) | 2011-07-12 | 2011-07-12 | Air spring adjusting static stiffness and dynamic stiffness through volume and displacement and having pressure-limiting and impact-reducing functions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728327A (en) * | 2013-12-18 | 2015-06-24 | 现代自动车株式会社 | Air spring for vehicle |
| CN111879605A (en) * | 2020-09-10 | 2020-11-03 | 长安大学 | Impact loading device with adjustable contact rigidity and contact rigidity adjusting method thereof |
| CN113498396A (en) * | 2019-03-04 | 2021-10-12 | Ｋｙｂ株式会社 | Buffer device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62103214A (en) * | 1985-10-30 | 1987-05-13 | Atsugi Motor Parts Co Ltd | Car height adjusting device with auxiliary air tank |
| JPS62103213A (en) * | 1985-10-30 | 1987-05-13 | Atsugi Motor Parts Co Ltd | Car height adjusting device with auxiliary air tank |
| US4673171A (en) * | 1983-12-24 | 1987-06-16 | Toyota Jidosha Kabushiki Kaisha | Air suspension |
| CN202170951U (en) * | 2011-07-12 | 2012-03-21 | 杨洁 | Air spring with volume and displacement adjustable static/dynamic stiffness and limited pressure buffering |
-
2011
- 2011-07-12 CN CN201110192140XA patent/CN102392867A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4673171A (en) * | 1983-12-24 | 1987-06-16 | Toyota Jidosha Kabushiki Kaisha | Air suspension |
| JPS62103214A (en) * | 1985-10-30 | 1987-05-13 | Atsugi Motor Parts Co Ltd | Car height adjusting device with auxiliary air tank |
| JPS62103213A (en) * | 1985-10-30 | 1987-05-13 | Atsugi Motor Parts Co Ltd | Car height adjusting device with auxiliary air tank |
| CN202170951U (en) * | 2011-07-12 | 2012-03-21 | 杨洁 | Air spring with volume and displacement adjustable static/dynamic stiffness and limited pressure buffering |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728327A (en) * | 2013-12-18 | 2015-06-24 | 现代自动车株式会社 | Air spring for vehicle |
| CN113498396A (en) * | 2019-03-04 | 2021-10-12 | Ｋｙｂ株式会社 | Buffer device |
| CN111879605A (en) * | 2020-09-10 | 2020-11-03 | 长安大学 | Impact loading device with adjustable contact rigidity and contact rigidity adjusting method thereof |
| CN111879605B (en) * | 2020-09-10 | 2023-02-24 | 长安大学 | Impact loading device with adjustable contact rigidity and contact rigidity adjusting method thereof |
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Application publication date: 20120328 |