CN102287471A - Dynamic stiffness adjusting air spring capable of adapting to pressure-volume combination - Google Patents
Dynamic stiffness adjusting air spring capable of adapting to pressure-volume combination Download PDFInfo
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- CN102287471A CN102287471A CN2011102028794A CN201110202879A CN102287471A CN 102287471 A CN102287471 A CN 102287471A CN 2011102028794 A CN2011102028794 A CN 2011102028794A CN 201110202879 A CN201110202879 A CN 201110202879A CN 102287471 A CN102287471 A CN 102287471A
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Abstract
The invention relates to an air spring, which is important for improvement of the smoothness and comfortableness of a vehicle, protection of a road and goods and limitation of overloading. In a matching model for static stiffness properties of an air spring, the adjustment of static stiffness required as a result of a difference between the stiffness of an optional standard series balloon and the stiffness of a specific vehicle is ignored, and difficulties in dynamic stiffness adjustment are caused by the non-matching static stiffness of the balloon. In a passive air suspension system, the non-matching static stiffness of the balloon is a major cause for serious lateral swinging of the vehicle during running. The existing dynamic stiffness adjustment adopts connection of a main air chamber and an auxiliary air chamber and is realized via changing the pressure difference of air flow between the main air chamber and the auxiliary air chamber based on adjustment of a throttle port on a channel. The volume of the air chambers is not changed during adjustment of the stiffness adjusting system, and difficulties in stiffness adjustment are increased. The invention provides a novel air spring, aiming to solve the problems. The static stiffness and dynamic stiffness can be adjusted, and the novel air spring has a simple structure and low cost and is convenient and practical.
Description
One. technical field:
The present invention relates to a kind of vehicle air suspension pneumatic spring, the pneumatic spring that this dynamic stiffness self-adaptive pressure and volume combination are regulated especially is 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.
One, 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, by controlling the aperture of the throttle valve on the connecting passage between major and minor air chamber, pressure reduction when realizing gas flow between the major-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.Rigidity segmented control is generally adopted in the control of the rigidity of pneumatic spring in the airsuspension system 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 by 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.The rigidity of pneumatic spring is artificial the selection.
Two, summary of the invention:
Purpose of the present invention will be developed a kind of low cost exactly, and dynamic stiffness self adaption pressure reduction and volume simple and reliable, responding fast make up the pneumatic spring of regulating.
Solution of the present invention is: this pneumatic spring is combined by air bag 1, upper mounting plate 2, accessory air-space 3, throttling valve core 4, spring 5, lower installation board 6 and screw plug 7.Accessory air-space 3 is contained in the central position of lower installation board 6 inner planes and fixes on it, throttling valve core 4 is contained in the middle endoporus of accessory air-space 3, its upper end heads on the middle endoporus top board of accessory air-space 3, the location is supported by spring 5 in the lower end, the bottom of spring 5 is had an aperture in the middle of the screw plug 7 and is communicated with atmosphere by screw plug 7 location; The decrement of spring 5 can be by screw plug 7 lower installation board 6 outside adjustings; The dynamic stiffness of pneumatic spring is regulated: the air pressure in the air bag 1 directly acts on the upper-end surface of throttling valve core 4, its lower end is by spring 5 axially support, when vehicle is in unloaded and setting height, air bag 1 inner air pressure multiply by the thrust that sectional area produced of throttling valve core 4 and the spring force balance of spring 5, the throttle orifice of throttling valve core 4 is communicated with the throttle orifice of two independent air chambers of accessory air-space 3 and is in maximum open, and the dynamic stiffness of pneumatic spring is minimum; Load increase and dynamic load increase when vehicle, air bag 1 inner air pressure rises, acting on the thrust that is produced on the upper-end surface of throttling valve core 4 increases, the spring force that promotion throttling valve core 4 overcomes spring 5 moves down, reach new balance, throttling valve core 4 moves down the restriction on the connecting passage that has turned down 3 of air bag 1 and accessory air-spaces, in the switching stroke section of this restriction, by improving the gas flow pressure reduction of 3 of air bag 1 and accessory air-spaces, realized the dynamic stiffness of continuous adjusting pneumatic spring; Pressure in air bag 1 continues to improve, promoting throttling valve core 4 continues to move down, will close accessory air-space 3 uppermost first sub-air chamber, only having stayed second sub-air chamber links to each other with air bag 1, the volume that has reduced pneumatic spring in the continuous rigidity adjustment of pneumatic spring on the physical significance, realize the air spring rigidity combination adjusting that pressure reduction and volume are combined, the dynamic stiffness of pneumatic spring is increased, adapted to corresponding load.When the load of vehicle further increases, then automatically second sub-air chamber of accessory air-space 3 is repeated the adjustment process of above-mentioned first sub-air chamber.When vehicle turns round, because action of inertia leans on air bag 1 inner air pressure of the pneumatic spring in the bend outside to rise, equally, restriction on the connecting passage that meeting pass ballonet 1 and accessory air-space are 3 increases the dynamic stiffness of pneumatic spring, thereby has stoped the further inclination of vehicle body; When the vehicle jack rabbit start or when bringing to a halt, if the rigidity of pneumatic spring does not increase thereupon, same because action of inertia, can make vehicle body produce the layback and the phenomenon that leans forward, the present invention has equally when vehicle body produces layback and lean forward generation, improve the function of the dynamic stiffness of back, preceding pneumatic spring, suppress the aggravation of this phenomenon effectively.
Control signal of the present invention is directly taken from the gas pressure in the air bag 1, and control signal and regulating command are integrated, and effect rapidly, does not reliably have the response time lag, and the dynamic stiffness regulating power of pneumatic spring greatly improves; After having guaranteed the low vibration frequency characteristic of pneumatic spring, by 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; Because control command of the present invention is the gas pressure in the air bag 1, the dynamic stiffness of pneumatic spring is regulated automatically with the variation in pressure in the air bag 1, regulates smooth and easy continuous.The adjusting load-deflection curve of pneumatic spring is more reasonable and controlled.
The present invention also can be designed to the one-level restriction pattern of throttle valve the two-step serial restriction pattern of one-level fixed restriction and one-level variable restrictor: promptly at the circular groove that the opening equal diameters on the inner hole wall in the middle of an axial length and the sub-air chamber 3 is set on the cylindrical of throttling valve core 4, this circular groove is communicated with by the endoporus of radial hole with throttling valve core 4, by reducing the diameter of the radially throttle orifice on the throttling valve core 4, it is designed to the one-level fixed throttle port; And the communication port on the inner hole wall is exactly original settable orifice in the middle of circular groove on throttling valve core 4 cylindricals and the sub-air chamber 3; The orifice size of different just this restrictions is a little big a little.The pressure drop that this polyphone throttling pattern has been shared the one-level restriction by the two-step throttle mouth helps reducing the susceptibility of restriction to variation in pressure, improves the occupant and gets travelling comfort; Help reducing the processing and the installation precision of throttle valve, save cost.
Four, description of drawings:
Accompanying drawing 1 is a structure principle chart of the present invention.
Five, embodiment:
The dynamic stiffness of pneumatic spring is regulated: the air pressure in the air bag 1 directly acts on the upper-end surface of throttling valve core 4, its lower end is by spring 5 axially support, when vehicle is in unloaded and setting height, air bag 1 inner air pressure multiply by the thrust that sectional area produced of throttling valve core 4 and the spring force balance of spring 5, the throttle orifice of throttling valve core 4 is communicated with the throttle orifice of two independent air chambers of accessory air-space 3 and is in maximum open, and the dynamic stiffness of pneumatic spring is minimum; Dynamic load increase when vehicle, air bag 1 inner air pressure rises, acting on the thrust that is produced on the upper-end surface of throttling valve core 4 increases, the spring force that promotion throttling valve core 4 overcomes spring 5 moves down, reach new balance, throttling valve core 4 moves down the restriction on the connecting passage that has turned down 3 of air bag 1 and accessory air-spaces, in the switching stroke section of this restriction, by improving the gas flow pressure reduction of 3 of air bag 1 and accessory air-spaces, realized the dynamic stiffness of continuous adjusting pneumatic spring; Pressure in air bag 1 continues to improve, promoting throttling valve core 4 continues to move down, will close accessory air-space 3 uppermost first sub-air chamber, only having stayed second sub-air chamber links to each other with air bag 1, the volume that has reduced pneumatic spring in the continuous rigidity adjustment of pneumatic spring on the physical significance, realize the air spring rigidity combination adjusting that pressure reduction and volume are combined, the dynamic stiffness of pneumatic spring is increased, adapted to corresponding dynamic load.When the load of vehicle further increases, then automatically second sub-air chamber of accessory air-space 3 is repeated the adjustment process of above-mentioned first sub-air chamber.When vehicle turns round, because action of inertia leans on air bag 1 inner air pressure of the pneumatic spring in the bend outside to rise, equally, restriction on the connecting passage that meeting pass ballonet 1 and accessory air-space are 3 increases the dynamic stiffness of pneumatic spring, thereby has stoped the further inclination of vehicle body; When the vehicle jack rabbit start or when bringing to a halt, if the dynamic stiffness of pneumatic spring does not increase thereupon, same because action of inertia, can make vehicle body produce the layback and the phenomenon that leans forward, the present invention has equally when vehicle body produces layback and lean forward generation, improve the function of the dynamic stiffness of back, preceding pneumatic spring, suppress the aggravation of this phenomenon effectively.
Claims (4)
1. the pneumatic spring of dynamic stiffness is regulated in the combination of self-adaptive pressure and volume, is combined by air bag (1), upper mounting plate (2), accessory air-space (3), throttling valve core (4), spring (5), lower installation board (6) and screw plug (7); It is characterized in that: accessory air-space (3) is installed and is fixed on lower installation board (6) and goes up on the bottom plane, throttling valve core (4) is contained in the middle endoporus of accessory air-space (3), its upper end heads on the middle endoporus top board of accessory air-space (3), the location is supported by spring (5) in the lower end, the bottom of spring (5) is had an aperture in the middle of the screw plug (7) and is communicated with atmosphere by screw plug (7) location; The decrement of spring (5) can be regulated by screw plug (7); Screw plug (7) is installed on the lower installation board (6); The dynamic stiffness of pneumatic spring is regulated: when vehicle is in unloaded setting height, air bag (1) inner air pressure multiply by the thrust that sectional area produced of throttling valve core (4) and the spring force balance of spring (5), the throttle orifice of throttling valve core (4) is communicated with the opening of two independent air chambers of accessory air-space (3) and is in maximum open, and the dynamic stiffness of pneumatic spring is minimum; Load and dynamic load increase when vehicle, air bag (1) inner air pressure rises, acting on the thrust that is produced on the upper-end surface of throttling valve core (4) increases, the spring force that promotion throttling valve core (4) overcomes spring (5) moves down, reach new balance, throttling valve core (4) moves down the restriction on the connecting passage that has turned down between air bag (1) and accessory air-space (3), in the switching stroke section of this restriction, by improving the gas flow pressure reduction between air bag (1) and accessory air-space (3), realized the dynamic stiffness of continuous adjusting pneumatic spring; Pressure in air bag (1) continues to improve, promote throttling valve core (4) and continue to move down, will close uppermost first sub-air chamber of accessory air-space (3), only stayed second sub-air chamber and linked to each other with air bag (1), the dynamic stiffness of pneumatic spring is increased, adapt to corresponding dynamic load; When the dynamic load of vehicle further increases, then automatically second sub-air chamber of accessory air-space (3) is repeated the adjustment process of above-mentioned first sub-air chamber; When vehicle turns round, because action of inertia leans on air bag (1) inner air pressure of the pneumatic spring in the bend outside to rise, equally, can close the restriction on the connecting passage between ballonet (1) and accessory air-space (3), the dynamic stiffness of pneumatic spring is increased, thereby stop the further inclination of vehicle body; When the vehicle jack rabbit start or when bringing to a halt, if the dynamic stiffness of pneumatic spring does not increase thereupon, same because action of inertia, can make vehicle body produce the layback and the phenomenon that leans forward, the present invention has equally when vehicle body produces layback and lean forward generation, improve the function of the dynamic stiffness of back, preceding pneumatic spring, suppress the aggravation of this phenomenon effectively.
2. the pneumatic spring of dynamic stiffness is regulated in a kind of self-adaptive pressure according to claim 1 and volume combination, and it is characterized in that: the volume of the independent sub-air chamber of accessory air-space (3) can be according to the different Demand Design of different automobile types to its air spring rigidity change curve with number.
3. the pneumatic spring of dynamic stiffness is regulated in the combination of a kind of self-adaptive pressure according to claim 1 and volume, it is characterized in that: the two-stage tandem combination throttling form that the one-level throttling form of the restriction of throttle valve spool (4) is designed to one-level fixed restriction and one-level variable restrictor.
4. the pneumatic spring of dynamic stiffness is regulated in a kind of self-adaptive pressure according to claim 1 and volume combination, it is characterized in that: accessory air-space (3), throttling valve core (4), spring (5), screw plug (7) are arranged on the gas upper mounting plate (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102028794A CN102287471A (en) | 2011-07-19 | 2011-07-19 | Dynamic stiffness adjusting air spring capable of adapting to pressure-volume combination |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102028794A CN102287471A (en) | 2011-07-19 | 2011-07-19 | Dynamic stiffness adjusting air spring capable of adapting to pressure-volume combination |
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| CN102287471A true CN102287471A (en) | 2011-12-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210124A (en) * | 2018-11-30 | 2019-01-15 | 中国电子工程设计院有限公司 | A kind of bellows type air spring |
| CN110195761A (en) * | 2019-04-17 | 2019-09-03 | 武汉船用机械有限责任公司 | Hydraulic anticollision device, collision-prevention device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1335218A (en) * | 1970-03-19 | 1973-10-24 | Wright Barry Corp | Shock and vibration isolator apparatus |
| RU2325568C1 (en) * | 2006-08-24 | 2008-05-27 | Государственное Образовательное Учреждение Высшего Профессионального Образования "Омский Государственный Технический Университет" | Pneumatic suspension |
| CN101623994A (en) * | 2008-07-08 | 2010-01-13 | 贺勍 | Novel air spring rigidity adaptive continuous adjustment system |
| CN102032309A (en) * | 2010-11-19 | 2011-04-27 | 江苏大学 | volume variable additional air chamber of air spring |
| US20110115140A1 (en) * | 2008-07-09 | 2011-05-19 | Firestone Industrial Products Company, Llc | Gas spring and gas damper assembly and method |
-
2011
- 2011-07-19 CN CN2011102028794A patent/CN102287471A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1335218A (en) * | 1970-03-19 | 1973-10-24 | Wright Barry Corp | Shock and vibration isolator apparatus |
| RU2325568C1 (en) * | 2006-08-24 | 2008-05-27 | Государственное Образовательное Учреждение Высшего Профессионального Образования "Омский Государственный Технический Университет" | Pneumatic suspension |
| CN101623994A (en) * | 2008-07-08 | 2010-01-13 | 贺勍 | Novel air spring rigidity adaptive continuous adjustment system |
| US20110115140A1 (en) * | 2008-07-09 | 2011-05-19 | Firestone Industrial Products Company, Llc | Gas spring and gas damper assembly and method |
| CN102032309A (en) * | 2010-11-19 | 2011-04-27 | 江苏大学 | volume variable additional air chamber of air spring |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210124A (en) * | 2018-11-30 | 2019-01-15 | 中国电子工程设计院有限公司 | A kind of bellows type air spring |
| CN110195761A (en) * | 2019-04-17 | 2019-09-03 | 武汉船用机械有限责任公司 | Hydraulic anticollision device, collision-prevention device |
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Application publication date: 20111221 |