CN102367855A - Air spring capable of adjusting static stiffness through fillers and adjusting dynamic stiffness through differential pressure by stages - Google Patents
Air spring capable of adjusting static stiffness through fillers and adjusting dynamic stiffness through differential pressure by stages Download PDFInfo
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- CN102367855A CN102367855A CN2011103169361A CN201110316936A CN102367855A CN 102367855 A CN102367855 A CN 102367855A CN 2011103169361 A CN2011103169361 A CN 2011103169361A CN 201110316936 A CN201110316936 A CN 201110316936A CN 102367855 A CN102367855 A CN 102367855A
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- pneumatic spring
- fitting seat
- regulator plate
- rigidity
- throttling regulator
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Abstract
An air spring in a modern automotive suspension system plays an important part in improving the smoothness and control stability of the vehicles and protecting roads and goods. A main air chamber and an auxiliary air chamber are connected and a throttle on a channel connecting the main and auxiliary air chambers is changed to widen the stiffness adjustment range of the air spring. The stiffness adjustment control signals are acquired by multi-channel sensors, an action instruction is sent out after the control signals are sent to a computer to be processed and then the stiffness of the air spring is adjusted. But the control mode has the defects of higher response time lag and high cost. The invention provides a novel air spring capable of adaptively adjusting dynamic stiffness through differential pressure, aiming at the problem. The air spring directly utilizes the pressure signals in an air bag to control the aperture of the throttle on the channel between the main and auxiliary air chambers to achieve the aim of continuous stiffness adjustment and utilizes the reverse impact differential pressure of the main and auxiliary air chambers to control the throttle to achieve the aim of weakening the impact of the bump on the vehicle body. The air spring has the advantages of simple structure, fast and reliable response and low cost and can adjust the static stiffness conveniently and quickly.
Description
One, technical field:
The present invention relates to that packing that a kind of vehicle air suspension uses is regulated quiet rigidity and self adaption pressure reduction is regulated the pneumatic spring of dynamic stiffness.This pneumatic spring especially is adapted to carrying big bus, city bus big bus, goods stock, also is adapted to rail traffic vehicles, special vehicle and limousine.
Two, background technique:
In order to improve ride of vehicle, improve travelling comfort and the control stability taken, 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, people have developed half active and active air suspension system.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 dynamic stiffness that changes pneumatic spring.The control signal of this dynamic stiffness regulating system is delivered and is sent control command after microprocessor is handled, by the aperture that actuator regulates throttle valve, the dynamic stiffness of regulating pneumatic spring by the multiple sensor collection.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, is prone to cause system's control fails and reverse effect occurs.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.The rigidity of pneumatic spring is artificially to select according to road conditions.In engineering reality, people make air bag according to the design load of pneumatic spring, but in the series product of existing air bag, choose the approaching air bag of parameter according to design load.Here just there are two deficiencies can cause the quiet rigidity value of pneumatic spring can not satisfy people's expection, the one, design error; The 2nd, the error between performance of products parameter and the design load of selecting for use.It needs a kind of effective mean of calculating and method quiet rigidity to pneumatic spring in practical application to regulate, and makes it to reach and comparatively reasonably uses category.
Three, summary of the invention:
The object of the invention will be developed a kind of low cost exactly, simple and reliable, responding fast, the convenient and practical pneumatic spring that quiet rigidity is regulated and dynamic stiffness self adaption pressure reduction is regulated.
Solution of the present invention is: this packing transfers quiet rigidity and pressure reduction classification to regulate the pneumatic spring of dynamic stiffness, is combined by air bag 1, upper mounting plate 2, upper limit blob of viscose 3, bolt 4, throttling regulator plate 5, following fitting seat 6, lower limit bearing 7 and packing 8; Lower limit bearing 7 is fixed on down the central position of fitting seat 6, and lower limit bearing 7 will exceed a part than following fitting seat 6; Throttling regulator plate 5 by elasticity preferably rubber material process, or by elasticity preferably plastic material and metallic material process, be installed in the central position of lower limit bearing 7 through bolt 4; On the end face of throttling regulator plate 5, with following fitting seat 6 top endoporus and circumference that annular flow groove center line between lower limit bearing 7 cylindricals equates on be uniformly distributed with several straight-through apertures; Being separated into pneumatic spring with air bag 1 by throttling regulator plate 5 is main gas tank, and following fitting seat 6 is the composite air spring of accessory air-space; And formed constant restriction by several apertures on the throttling regulator plate 5, the composite throttling valve of settable orifice has been formed in the annular pass, side that the plane is pushed up on throttling regulator plate 5 cylindrical bottom planes and following fitting seat 6 tops; Throttling regulator plate 5 can be made up of polylith; Packing 8 is bulk granular thing or annular slice thing; Its quiet rigidity regulating method is: in the assembling process of pneumatic spring; Down 6 li fillings of fitting seat are advanced through calculating or test the packing 8 of confirming volume earlier; Because filling has occupied the compressed-air actuated volume of equal volume in the pneumatic spring advance the packing 8 in the following fitting seat 6; Reduce compressed-air actuated volume, improved the quiet rigidity of pneumatic spring; Otherwise, take out the packing 8 that part has been inserted for 6 li from following fitting seat, just increased equal volume compressed-air actuated volume, just reduced the quiet rigidity of pneumatic spring relatively.The adjustment process of its dynamic stiffness is: during when stationary vehicle with in running state more stably; It is little that throttling regulator plate 5 upper and lower surfaces do not have the pressure reduction differential pressure; Elastic equilibrium by its material; The settable orifice no change that the annular pass, side on throttling regulator plate 5 cylindrical bottom planes and plane, top, following fitting seat 6 tops is formed, air bag 1 and 6 rare gas flow of following fitting seat, the dynamic stiffness of pneumatic spring adds the internal capacity and the gas pressure decision of fitting seat 6 down by air bag 1 internal volume; When the dynamic load that is caused by carbody and mass carried increases; Pressure field that will pressure of top-down generation falls progressively in the volume of air bag 1 and following fitting seat 6; Because the differential pressure action that increases on the lower plane on the throttling regulator plate 5; Make throttling regulator plate 5 cylindrical bottom planes press close to the plane, top, top of fitting seat 6 down downwards; Progressively turn down and close throttling regulator plate 5 cylindrical bottom planes and push up the settable orifice of the annular pass, side on plane, accomplished the dynamic stiffness of the pneumatic spring under the more low-level dynamic load effect and regulated with following fitting seat 6 tops; Only stay several aperture communicated air bags 1 and following fitting seat 6 of being arranged on the throttling regulator plate 5; The circulation area of air-flow greatly reduces; The gas flow pressure reduction that speed regulation air bag 1 that its can be automatically moves downward according to the dynamic load that continues to increase and upper mounting plate 2 and following fitting seat are 6 is further heightened the dynamic stiffness of pneumatic spring, the dynamic load that balance is caused by carbody and mass carried automatically; Reduce the inclination of vehicle body, improve the smoothness and the control stability of vehicle; When vehicle is in operation when running into the road surface projection; Can produce a step pressure surge that successively decreases from the bottom to top in fitting seat 6 and the air bag 1 down this moment; The impact of this step pressure wave makes throttling regulator plate 5 upwards turn over from the cylindrical bottom plane to stick up, and has strengthened the side annular pass of throttling regulator plate 5 cylindrical bottom planes with following fitting seat 6 tops rapidly, has eliminated the pressure reduction of throttling regulator plate about in the of 5; The dynamic stiffness that makes pneumatic spring is minimum; Be beneficial to being compressed rapidly of pneumatic spring, reduce of the impact of road surface projection, improve the smoothness of vehicle vehicle body.
The present invention be directed to the typical structure design of existing pneumatic spring; It need not the structure of existing pneumatic spring is done any change; Only need to design and produce out a throttling regulator plate 5 according to the performance parameter of former pneumatic spring; Throttling regulator plate 5 can be made up of one or more, can the upgrading of original passive type pneumatic spring be become quiet rigidity and can be in harmonious proportion the stiffness variable pneumatic spring that the dynamic stiffness self adaption regulates.Help reducing the inclination of vehicle body, improve the smoothness and the control stability of vehicle; Help reducing cost and the promoting the use of of air suspension.
Control signal of the present invention is directly taken from the pressure in the pneumatic spring, 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, the throttle orifice that number does not wait on the volume through different major-minor air chambers is set and the throttling regulator plate 5 and set up different diameters and the auxiliary spacer of sheet number can improve the load-deflection curve of pneumatic spring effectively.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 pressure reduction of major-minor air chamber, the rigidity of pneumatic spring is regulated with the variation in pressure of major-minor air chamber automatically, regulates smooth and easy continuous.The adjusting load-deflection curve of pneumatic spring is more reasonable and controlled.
Four, description of drawings:
Accompanying drawing 1 is a structure principle chart of the present invention.
Five, embodiment:
Embodiment of the present invention is: quiet rigidity is regulated: in the assembling process of pneumatic spring; Down the packing 8 through calculating or the definite volume of test is loaded in fitting seat 6 inside earlier; Because filling has occupied the compressed-air actuated volume of equal volume in the pneumatic spring advance the packing 8 in the following fitting seat 6; Reduce compressed-air actuated volume, improved the quiet rigidity of pneumatic spring; Otherwise, take out the packing 8 that part has been inserted for 6 li from following fitting seat, just increased equal volume compressed-air actuated volume, just reduced the quiet rigidity of pneumatic spring relatively.Dynamic stiffness is regulated: during when stationary vehicle with in running state more stably; Although the inner space of air bag 1 and following fitting seat 6 has been separated into the major-minor air chamber by throttling regulator plate 5; But because the area of passage of the throttle orifice on the throttling regulator plate 5; Adding that area of passage that annular pass, interplanar side is communicated with is pushed up on throttling regulator plate 5 cylindrical bottom planes and following fitting seat 6 tops can be more than or equal to the endoporus on fitting seat 6 tops and the area of passage of the circular groove between lower limit bearing 7 cylindricals down; Kept good circulation in the inside of following fitting seat 6 and the air bag 1 and do not had the pressure reduction state, the rigidity of pneumatic spring adds the volume decision of fitting seat 6 up and down by the volume of pneumatic spring inner air pressure and air bag 1.The dynamic stiffness of pneumatic spring is minimum; When the dynamic load that is caused by carbody and mass carried increases; This dynamic load acts on the upper mounting plate 2; Pressurized air in the pressurized air spring exists the pressure field that a pressure falls progressively owing to top-down in the pneumatic spring, at this moment because the effect of throttling regulator plate pressure reduction about in the of 5 from top to bottom; Make throttling regulator plate 5 cylindrical bottom planes be adjacent to down plane on the fitting seat 6 downwards; Progressively turn down and close the annular pass, side on plane on throttling regulator plate 5 cylindrical bottom planes and the following fitting seat 6, only stayed on the throttling regulator plate 5, be communicated with vertical several apertures that communicate of annular flow groove on following fitting seat 6 tops; This pneumatic spring is accomplished the continuous self-regulating process of its first dynamic stiffness; Then the gas flow pressure reduction that speed regulation air bag 1 that is moved downward according to the size and the upper mounting plate 2 of dynamic load automatically by several apertures on the throttling regulator plate 5 and following fitting seat are 6, thereby the dynamic stiffness of regulating pneumatic spring automatically, the dynamic load that balance is caused by carbody and mass carried; Reduce the inclination of vehicle body, improve the smoothness and the control stability of vehicle.When vehicle is in operation when running into the road surface projection; Understand this moment and in the inner space of following fitting seat 6 and air bag 1, produce a step pressure surge that falls progressively from the bottom to top; The impact of this step pressure wave makes throttling regulator plate 5 upwards turn over from the cylindrical bottom plane to stick up, and has strengthened the side annular pass of throttling regulator plate 5 cylindricals bottom with following fitting seat 6 tops rapidly, further lowers or has eliminated the pressure reduction of throttling regulator plate about in the of 5; The dynamic stiffness that makes pneumatic spring is minimum; Be beneficial to being compressed rapidly of pneumatic spring, reduce of the impact of road surface projection, improve the smoothness and the control stability of vehicle vehicle body.
Claims (7)
1. a packing transfers quiet rigidity and pressure reduction classification to transfer the pneumatic spring of rigidity, is combined by air bag (1), upper mounting plate (2), upper limit blob of viscose (3), bolt (4), throttling regulator plate (5), following fitting seat (6), lower limit bearing (7) and packing (8); It is characterized in that: lower limit bearing (7) is fixed on down the central position of fitting seat (6), and lower limit bearing (7) exceeds a part than following fitting seat (6); Throttling regulator plate (5) by elasticity preferably rubber material process, be installed in the central position of lower limit bearing (7) through bolt (4); On the end face of throttling regulator plate (5), with following fitting seat (6) top endoporus and lower limit bearing (7) cylindrical between the circumference that equates of annular flow groove center line on be uniformly distributed with several straight-through apertures; Being separated into pneumatic spring with air bag (1) by throttling regulator plate (5) is main gas tank, and following fitting seat (6) is the composite air spring of accessory air-space; And formed constant restriction by several apertures on the throttling regulator plate (5), the composite throttling valve of settable orifice has been formed in the annular pass, side that the plane is pushed up on throttling regulator plate (5) cylindrical bottom plane and following fitting seat (6) top; Its quiet rigidity is regulated: in the assembling process of pneumatic spring; Down the packing (8) through calculating or the definite volume of test is loaded in fitting seat (6) inside earlier; Owing to load the compressed-air actuated volume that has occupied equal volume in the pneumatic spring advance the packing (8) of following fitting seat (6) lining; Reduce compressed-air actuated volume, improved the quiet rigidity of pneumatic spring; Otherwise, take out the packing (8) that part has been inserted from following fitting seat (6) lining, just increased the compressed-air actuated volume of equal volume, just reduced the quiet rigidity of pneumatic spring relatively; The adjustment process of its dynamic stiffness is: during when stationary vehicle with in running state more stably; It is little that throttling regulator plate (5) upper and lower surfaces does not have the pressure reduction differential pressure; Elastic equilibrium by its material; The settable orifice no change that the annular pass, side on throttling regulator plate (5) cylindrical bottom plane and plane, top, following fitting seat (6) top is formed, air-flow is unobstructed between air bag (1) and following fitting seat (6), and the dynamic stiffness of pneumatic spring adds the internal capacity and the air pressure decision of fitting seat (6) down by air bag (1) internal volume; When the dynamic load that is caused by carbody and mass carried increases; Pressure field that will pressure of top-down generation falls progressively in the volume of air bag (1) and following fitting seat (6); This pressure field acts on throttling regulator plate (5) and goes up the pressure reduction increase on the lower plane; Make throttling regulator plate (5) cylindrical bottom plane press close to the plane, top, top of fitting seat (6) down downwards; Progressively turn down and close throttling regulator plate (5) cylindrical bottom plane and push up the settable orifice of the annular pass, side on plane, accomplished the dynamic stiffness of the pneumatic spring under the more low-level dynamic load effect and regulated with following fitting seat (6) top; Only stay speed regulation air bag (1) that several apertures of being arranged on the throttling regulator plate (5) move downward according to the dynamic load that continues to increase and upper mounting plate (2) automatically and the gas flow pressure reduction between following fitting seat (6); Further heighten the dynamic stiffness of pneumatic spring automatically; The dynamic load that balance is caused by carbody and mass carried; Reduce the inclination of vehicle body, improve the smoothness and the control stability of vehicle; When vehicle is in operation when running into the road surface projection; Can produce a step pressure surge that successively decreases from the bottom to top in fitting seat (6) and the air bag (1) down this moment; The impact of this step pressure wave makes throttling regulator plate (5) upwards turn over from the cylindrical bottom plane to stick up, and has strengthened the side annular pass of throttling regulator plate (5) cylindrical bottom plane with following fitting seat (6) top rapidly, has eliminated throttling regulator plate (5) pressure reduction up and down; The dynamic stiffness that makes pneumatic spring is minimum; Be beneficial to being compressed rapidly of pneumatic spring, reduce of the impact of road surface projection, improve the smoothness of vehicle vehicle body.
2. a kind of packing according to claim 1 transfers quiet rigidity and pressure reduction classification to transfer the pneumatic spring of rigidity, it is characterized in that: throttling regulator plate (5) by elasticity preferably plastic material process.
3. a kind of packing according to claim 1 transfers quiet rigidity and pressure reduction classification to transfer the pneumatic spring of rigidity, and it is characterized in that: throttling regulator plate (5) is processed by elasticity preferred metal material.
4. a kind of packing according to claim 1 transfers quiet rigidity and pressure reduction classification to transfer the pneumatic spring of rigidity, and it is characterized in that: throttling regulator plate (5) is made up of a slice.
5. a kind of packing according to claim 1 transfers quiet rigidity and pressure reduction classification to transfer the pneumatic spring of rigidity, and it is characterized in that: throttling regulator plate (5) is made up of multi-disc.
6. a kind of packing according to claim 1 transfers quiet rigidity and pressure reduction classification to transfer the pneumatic spring of rigidity, and it is characterized in that: packing (8) is the bulk granular thing.
7. a kind of packing according to claim 1 transfers quiet rigidity and pressure reduction classification to transfer the pneumatic spring of rigidity, and it is characterized in that: packing (8) is the annular slice thing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103169361A CN102367855A (en) | 2011-10-18 | 2011-10-18 | Air spring capable of adjusting static stiffness through fillers and adjusting dynamic stiffness through differential pressure by stages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103169361A CN102367855A (en) | 2011-10-18 | 2011-10-18 | Air spring capable of adjusting static stiffness through fillers and adjusting dynamic stiffness through differential pressure by stages |
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| Publication Number | Publication Date |
|---|---|
| CN102367855A true CN102367855A (en) | 2012-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103169361A Pending CN102367855A (en) | 2011-10-18 | 2011-10-18 | Air spring capable of adjusting static stiffness through fillers and adjusting dynamic stiffness through differential pressure by stages |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU640650A3 (en) * | 1970-06-04 | 1978-12-30 | Оршагош Гумипари Валалат (Инопредприятие) | Pneumatic spring |
| DE4108711A1 (en) * | 1991-03-16 | 1992-09-17 | Continental Ag | AIR SPRING WITH AN ELASTOMER AIR BELLOW |
| DE19733281A1 (en) * | 1997-08-01 | 1999-02-18 | Bpw Bergische Achsen Kg | Pneumatic spring for motor vehicles e.g. use with shock absorbers |
| DE102005026314B3 (en) * | 2005-06-07 | 2006-11-30 | Lkh-Kunststoffwerk Gmbh & Co. Kg | Plastic plunger for an air spring |
| JP4517328B2 (en) * | 2001-04-03 | 2010-08-04 | いすゞ自動車株式会社 | Air spring mounting structure |
| EP2243977A2 (en) * | 2009-04-24 | 2010-10-27 | ZF Friedrichshafen AG | Pneumatic spring damper |
-
2011
- 2011-10-18 CN CN2011103169361A patent/CN102367855A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU640650A3 (en) * | 1970-06-04 | 1978-12-30 | Оршагош Гумипари Валалат (Инопредприятие) | Pneumatic spring |
| DE4108711A1 (en) * | 1991-03-16 | 1992-09-17 | Continental Ag | AIR SPRING WITH AN ELASTOMER AIR BELLOW |
| DE19733281A1 (en) * | 1997-08-01 | 1999-02-18 | Bpw Bergische Achsen Kg | Pneumatic spring for motor vehicles e.g. use with shock absorbers |
| JP4517328B2 (en) * | 2001-04-03 | 2010-08-04 | いすゞ自動車株式会社 | Air spring mounting structure |
| DE102005026314B3 (en) * | 2005-06-07 | 2006-11-30 | Lkh-Kunststoffwerk Gmbh & Co. Kg | Plastic plunger for an air spring |
| EP2243977A2 (en) * | 2009-04-24 | 2010-10-27 | ZF Friedrichshafen AG | Pneumatic spring damper |
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Application publication date: 20120307 |