CN102330776A - Air spring with function of regulating rigidity according to volume and pressure and buffering step pressure - Google Patents
Air spring with function of regulating rigidity according to volume and pressure and buffering step pressure Download PDFInfo
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- CN102330776A CN102330776A CN201110199627A CN201110199627A CN102330776A CN 102330776 A CN102330776 A CN 102330776A CN 201110199627 A CN201110199627 A CN 201110199627A CN 201110199627 A CN201110199627 A CN 201110199627A CN 102330776 A CN102330776 A CN 102330776A
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Abstract
An air spring is of key importance for improving the smoothness and the comfortableness of a vehicle, protecting roads and cargoes and limiting overload. In the aspect of matching of the static rigidity characteristic of the air spring, people ignore static rigidity regulation for eliminating a difference between the rigidity of an air bag in a selectable standard series and the rigidity required by a specific vehicle; however, due to mismatch of the static rigidity of the air bag, the dynamic rigidity of the air spring is difficult to regulate; and in a passive air suspension system, the mismatch of the static rigidity of the air bag is an important reason why the vehicle produces a serious sidesway phenomenon during running. The conventional dynamic rigidity regulation is realized by connecting the main air chamber and the auxiliary air chamber and then changing a pressure difference, produced by flow of air, between a main air chamber and an auxiliary air chamber by regulating a throttling opening on a channel of the air spring; and by such a rigidity regulation system, the volumes of the air chambers are not really changed during regulation, so the difficulty in rigidity regulation is higher. In order to solve the problems, the invention provides a novel air spring which is regulable in static rigidity and dynamic rigidity, 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 and use pneumatic spring; This quiet rigidity volume adjustment and dynamic stiffness self-adaptive pressure are regulated the pneumatic spring that adds the step pressure buffer and especially are 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; Through 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.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.
Two, summary of the invention:
The object of the invention will be developed a kind of low cost exactly, and quiet rigidity volume adjustment and dynamic stiffness self-adaptive pressure simple and reliable, responding fast are regulated the pneumatic spring that adds the step pressure buffer.
Solution of the present invention is: this pneumatic spring is by air bag 1, upper mounting plate 2, accessory air-space 3, throttling valve core 4, spring 5, cylinder sleeve 6, piston 7, and adjusting screw rod 8, lower installation board 9, screw plug 10, locking nut 11 and two one-way valves 12 combine.Accessory air-space 3 is fixed on the inner plane of lower installation board 9; 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, and the bottom of spring 5 has an aperture and atmosphere by screw plug 10 location in the middle of the screw plug 10; Cylinder sleeve 6 is fixed on the inner plane of upper mounting plate 2, and piston 7 is installed in 6 li of cylinder sleeves; Adjusting screw rod 8 and cylinder sleeve 6 coaxial being installed on the upper mounting plate 2, its underpart heads on the last plane of piston 7, and top is stretched out upper mounting plate 2 and is left adjustment stroke; Locking nut 11 is installed in the upper end of adjusting screw rod 8; Two one-way valves 12 are installed in respectively on the outer side wall of two sub-air chamber of accessory air-space 3, and are communicated with by the spring chamber of the aperture on its sidewall with one-way valve 12; The quiet rigidity of pneumatic spring is regulated: unclamp locking nut 11, turn adjusting screw rod 8, piston 7 is moved down, 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: 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-spring bellows 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, and the restriction 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; When the load and the dynamic load increase of vehicle, air bag 1 inner air pressure rises, and acts on the thrust that is produced on the upper-end surface of throttling valve core 4 and 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; Through improving the gas flow pressure reduction of 3 of air bag 1 and accessory air-spaces, realized the rigidity 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 accessory air-space 3 uppermost first sub-air chamber, only stayed second sub-air chamber and linked 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 rigidity 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 rigidity 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 when vehicle body generation layback equally and leans forward when taking place; Improve the function of the dynamic stiffness of back, preceding pneumatic spring, suppress the aggravation of this phenomenon effectively.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 each sub-air chamber's internal air pressure of this step pressure and accessory air-space 3 forms can be opened one-way valve 12; Each sub-air chamber of rapid communicated air bags 1 and accessory air-space 3; Increased the available gas volume in the air bag 1; Reduce the dynamic stiffness 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 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 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.
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 throttle orifice 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; Through 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 restriction that the throttle orifice on the inner hole wall is formed in the middle of circular groove on throttling valve core 4 cylindricals and the sub-air chamber 3 is exactly original settable orifice; 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:
Embodiment of the present invention is: the quiet rigidity of pneumatic spring is regulated: unclamp locking nut 11, turn adjusting screw rod 8, piston 7 is moved down, 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: 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, and the restriction 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; When the load and the dynamic load increase of vehicle, air bag 1 inner air pressure rises, and acts on the thrust that is produced on the upper-end surface of throttling valve core 4 and 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; Through improving the gas flow pressure reduction of 3 of air bag 1 and accessory air-spaces, realized the rigidity of continuous adjusting pneumatic spring; Pressure in air bag 1 continues to improve, and promotes throttling valve core 4 and continues to move down, and 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; In the continuous rigidity adjustment of pneumatic spring, the volume that has reduced pneumatic spring on the physical significance has been realized the pneumatic spring dynamic stiffness combination adjusting that pressure reduction and volume are combined; The rigidity of pneumatic spring is increased, adapt 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 rigidity 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 when vehicle body generation layback equally and leans forward when taking place; Improve the function of the rigidity of back, preceding pneumatic spring, suppress the aggravation of this phenomenon effectively.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 each sub-air chamber's internal air pressure of this step pressure and accessory air-space 3 forms can be opened one-way valve 12; Each sub-air chamber of rapid communicated air bags 1 and 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.
Claims (3)
1. volume and pressure transfer rigidity to add the pneumatic spring of step pressure buffer; By air bag (1), upper mounting plate (2), accessory air-space (3), throttling valve core (4), spring (5), cylinder sleeve (6); Piston (7); Adjusting screw rod (8), lower installation board (9), screw plug (10), locking nut (11) and one-way valve (12) combine; It is characterized in that: accessory air-space (3) is fixed on the inner plane of lower installation board (9); 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, and the bottom of spring (5) has an aperture and atmosphere by screw plug (10) location in the middle of the screw plug (10); Cylinder sleeve (6) is fixed on the inner plane of upper mounting plate (2), and piston (7) is installed in cylinder sleeve (6) lining; Adjusting screw rod (8) is installed on the upper mounting plate (2) with cylinder sleeve (6) is coaxial; Its underpart heads on the last plane of piston (7), and top is stretched out upper mounting plate (2) and left adjustment stroke; Locking nut (11) is installed on the adjusting screw rod (8), and locks adjusting screw rod (8) with upper mounting plate (2); Two one-way valves (12) are installed in respectively on the sidewall of two sub-air chamber of accessory air-space (3), and are communicated with by the spring chamber of the aperture on its sidewall with one-way valve (12); The quiet rigidity of pneumatic spring is regulated: unclamp locking nut (11); Turn adjusting screw rod (8); Piston (7) is moved down; Volume between the last plane through expanding piston (7) and the inner plane of upper mounting plate (2) has reduced the interior gas actual volume of air bag (1), has 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 the load and the dynamic load increase of vehicle; Air bag (1) inner air pressure rises; Act on the thrust that is produced on the upper-end surface of throttling valve core (4) and increase, the spring force that promotion throttling valve core (4) overcomes spring (5) moves down, and reaches 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,, realized the rigidity of continuous adjusting pneumatic spring through improving the gas flow pressure reduction between air bag (1) and accessory air-space (3); Pressure in air bag (1) continues to improve, and promotes throttling valve core (4) and continues to move down, and will close uppermost first sub-air chamber of accessory air-space (3), has only stayed second sub-air chamber and has linked to each other with air bag (1); 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; Can close the restriction on the connecting passage between ballonet (1) and accessory air-space (3), the rigidity 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, 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 and produces layback and lean forward when taking place, and improves the function of the dynamic stiffness of back, preceding pneumatic spring; 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 each sub-air chamber's internal air pressure of this step pressure and accessory air-space (3) forms can be opened one-way valve (12); Each sub-air chamber of communicated air bags (1) and accessory air-space (3) has increased the available gas volume in the air bag (1) rapidly, reduces the rigidity of pneumatic spring; Reduce of the impact of road surface projection, improve the smoothness of vehicle vehicle body.
2. a kind of volume according to claim 1 and pressure transfer rigidity to add the pneumatic spring of step pressure buffer, 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 pressure transfer rigidity to add the pneumatic spring of step pressure buffer, it is characterized in that: accessory air-space (3) and component and screw plug (10) mounted thereto are fixed on the upper mounting plate (2); With cylinder sleeve (6), piston (7), adjusting screw rod (8), locking nut (11) is installed on the lower installation board (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110199627A CN102330776A (en) | 2011-07-17 | 2011-07-17 | Air spring with function of regulating rigidity according to volume and pressure and buffering step pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110199627A CN102330776A (en) | 2011-07-17 | 2011-07-17 | Air spring with function of regulating rigidity according to volume and pressure and buffering step pressure |
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| CN102330776A true CN102330776A (en) | 2012-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110199627A Pending CN102330776A (en) | 2011-07-17 | 2011-07-17 | Air spring with function of regulating rigidity according to volume and pressure and buffering step pressure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306233A (en) * | 2018-12-11 | 2020-06-19 | 郑州宇通客车股份有限公司 | Air spring and vehicle |
| CN111306234A (en) * | 2018-12-11 | 2020-06-19 | 郑州宇通客车股份有限公司 | Air spring and vehicle |
Citations (5)
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| CN1670399A (en) * | 2005-04-22 | 2005-09-21 | 清华大学 | Rigidity and damp adjustable air spring vibration isolator |
| CN101412354A (en) * | 2008-10-07 | 2009-04-22 | 朱洪纲 | Unpowered driven air spring compression refrigeration apparatus |
| 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 |
| CN202158128U (en) * | 2011-07-17 | 2012-03-07 | 贺劼 | Air spring with rigidity adjusted by volume and pressure and having phase step pressure buffering |
-
2011
- 2011-07-17 CN CN201110199627A patent/CN102330776A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1670399A (en) * | 2005-04-22 | 2005-09-21 | 清华大学 | Rigidity and damp adjustable air spring vibration isolator |
| 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 |
| CN101412354A (en) * | 2008-10-07 | 2009-04-22 | 朱洪纲 | Unpowered driven air spring compression refrigeration apparatus |
| CN202158128U (en) * | 2011-07-17 | 2012-03-07 | 贺劼 | Air spring with rigidity adjusted by volume and pressure and having phase step pressure buffering |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306233A (en) * | 2018-12-11 | 2020-06-19 | 郑州宇通客车股份有限公司 | Air spring and vehicle |
| CN111306234A (en) * | 2018-12-11 | 2020-06-19 | 郑州宇通客车股份有限公司 | Air spring and vehicle |
| CN111306233B (en) * | 2018-12-11 | 2022-06-07 | 宇通客车股份有限公司 | Air spring and vehicle |
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Application publication date: 20120125 |