CN102392873A - Air spring used for shiftingly adjusting dynamic stiffness and reducing dash of pressure limiting one-way valve - Google Patents
Air spring used for shiftingly adjusting dynamic stiffness and reducing dash of pressure limiting one-way valve Download PDFInfo
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- CN102392873A CN102392873A CN2011101990912A CN201110199091A CN102392873A CN 102392873 A CN102392873 A CN 102392873A CN 2011101990912 A CN2011101990912 A CN 2011101990912A CN 201110199091 A CN201110199091 A CN 201110199091A CN 102392873 A CN102392873 A CN 102392873A
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Abstract
The invention relates to an air spring used for shiftingly adjusting dynamic stiffness and reducing dash of a pressure limiting one-way valve, the air spring is important to improve smoothness and comfortability of a vehicle and protect a road and goods and limit overload in an automotive suspension system. In order to improve rigidity characteristic of the air spring, a main air chamber and a deputy air chamber are connected, a throttling port on a channel is adjusted to change differential pressure between the main air chamber and the deputy air chamber during the flowing of the air; a rigidity regulating system does not change the volume of the air chambers in an adjustment process, and the linearity difficulty of the rigidity adjustment is large; a novel compounding air spring is developed aim at solving the problem; the deputy air chamber is divided into multiple independent distributing air chambers, a shifting signal of a gasbag is directly used to control the throttling port opening on the a main air chamber channel and a deputy air chamber channel and the numbers of the throttling ports communicated with the distributing air chambers, so as to adjust dynamic stiffness of the air spring, the volume and the quantitative difference of each distributing air chamber are regulated to achieve the optimized adjustment of the rigidity, when a vehicle encounters a pavement lug, the dynamic stiffness can be reduced automatically thereby reducing impact of the pavement lug to the automobile body.
Description
One, technical field:
The present invention relates to a kind of vehicle air suspension and use pneumatic spring, the dynamic stiffness of this pneumatic spring is regulated with the displacement of air bag and the impact of road surface projection automatically.It especially is adapted to the carrying big bus, and the city bus big bus also is 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 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, and simple and reliable, dynamic stiffness governing response fast reaches the road surface projection and subtracts the pneumatic spring that dashes automatically.
Solution of the present invention is: this displacement adjusting dynamic stiffness adds the pressure limiting one-way valve and subtracts the pneumatic spring that dashes, and is combined by air bag 1, upper mounting plate 2, accessory air-space 3, removable cover 4, spring 5, push rod 6, lower installation board 7 and one-way valve 8.Fixing push rod 6 on the central position of upper mounting plate 2 inner planes; Fixing accessory air-space 3 that is separated into several sub-air chamber on the central position of lower installation board 7 inner planes; The outside suit of accessory air-space 3 internal diameter and accessory air-space 3 external diameters 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; Under the effect of spring 5, removable cover 4 contacts and moves up and down with it with push rod 6 all the time.One-way valve 8 is contained on the outer side wall of independent sub-air chamber of foot of accessory air-space 3, and is communicated with by the spring chamber of the radial hole on its sidewall with one-way valve 8; One-way valve 8 can be equated with sub-air chamber's number of accessory air-space 3; Be separately positioned on the madial wall of each independent sub-air chamber of accessory air-space 3; And be communicated with air bag 1 by the radial hole on its sidewall, the spring chamber of one-way valve 8 is communicated with each independent sub-air chamber of accessory air-space 3; One-way valve 8 also can be equated with sub-air chamber's number of accessory air-space 3, an one-way valve 8 is contained on the madial wall of bottom sub-air chamber of accessory air-space 3, remaining is contained on the dividing plate of each sub-air chamber of accessory air-space 3.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, 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 dynamic stiffness 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 sub-air chamber internal air pressures form can be opened one-way valve 8; Rapid communicated air bags 1 and accessory air-space 3 nethermost 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 displacement 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; Because control command of the present invention is the displacement of upper mounting plate 2, the rigidity of pneumatic spring is regulated with the change in displacement of upper mounting plate 2 automatically, regulates smooth and easy continuous.The adjusting load-deflection curve of pneumatic spring is more reasonable and controlled.
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: 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; 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.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 sub-air chamber internal air pressures form can be opened one-way valve 8; Rapid communicated air bags 1 and accessory air-space 3 nethermost 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 (7)
1. a displacement is regulated dynamic stiffness and is added the pressure limiting one-way valve and subtract the pneumatic spring that dashes, and is combined by air bag (1), upper mounting plate (2), accessory air-space (3), removable cover (4), spring (5), push rod (6), lower installation board (7) and one-way valve (8); It is characterized in that: fixing push rod (6) in the inner plane central position of upper mounting plate (2); At the inner plane central position of lower installation board (7) fixed joint air chamber (3); 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); Under the effect of spring (5), removable cover (4) contacts and moves up and down with it with push rod (6) all the time; One-way valve (8) is contained on the outer side wall of independent sub-air chamber of foot of accessory air-space (3), and is communicated with by the spring chamber of the radial hole on its sidewall with one-way valve (8); 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); The rigidity of pneumatic spring is minimum, and is 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 increase at the volley, upper mounting plate (2) moves down under the effect of dynamic load; 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); The pressure reduction actual volume interior when improving gas flow between air bag (1) and accessory air-space (3) with reducing air bag (1); Improve the rigidity of pneumatic spring, the dynamic load of balance vehicle body stops the inclination of vehicle body; 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 the nethermost sub-air chamber of accessory air-space (3) internal air pressure form can be opened one-way valve (8); Rapid communicated air bags (1) and the nethermost 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 displacement adjusting dynamic stiffness according to claim 1 adds the pressure limiting one-way valve and subtracts 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 displacement adjusting dynamic stiffness according to claim 1 adds the pressure limiting one-way valve and subtracts the pneumatic spring that dashes, and it is characterized in that: push rod (6) is made into one with upper mounting plate (2).
4. a kind of displacement according to claim 1 is regulated dynamic stiffness and is added the pressure limiting one-way valve and subtract the pneumatic spring that dashes, and it is characterized in that: spring (5) is made into extension spring, and two ends are fixed on the top plan of inner plane and removable cover (4) of upper mounting plate (2).
5. a kind of displacement adjusting dynamic stiffness according to claim 1 adds the pressure limiting one-way valve and subtracts 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 displacement according to claim 1 is regulated dynamic stiffness and added the pressure limiting one-way valve and subtract the pneumatic spring that dashes, and it is characterized in that: one-way valve (8) equates with sub-air chamber's number of accessory air-space (3), and is arranged on the inwall of each sub-air chamber of accessory air-space (3).
7. a kind of displacement adjusting dynamic stiffness according to claim 1 adds the pressure limiting one-way valve and subtracts the pneumatic spring that dashes; It is characterized in that: one-way valve (8) equates with sub-air chamber's number of accessory air-space (3), an one-way valve (8) is contained on the madial wall of bottom sub-air chamber of accessory air-space (3) on the dividing plate of remaining each sub-air chamber that is contained in accessory air-space (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101990912A CN102392873A (en) | 2011-07-17 | 2011-07-17 | Air spring used for shiftingly adjusting dynamic stiffness and reducing dash of pressure limiting one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101990912A CN102392873A (en) | 2011-07-17 | 2011-07-17 | Air spring used for shiftingly adjusting dynamic stiffness and reducing dash of pressure limiting one-way valve |
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| Publication Number | Publication Date |
|---|---|
| CN102392873A true CN102392873A (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101990912A Pending CN102392873A (en) | 2011-07-17 | 2011-07-17 | Air spring used for shiftingly adjusting dynamic stiffness and reducing dash of pressure limiting one-way valve |
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| CN (1) | CN102392873A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108528163A (en) * | 2018-06-19 | 2018-09-14 | 四川立地车辆底盘科技有限公司 | Automotive suspension double-capsule variation rigidity gas spring |
| CN108547901A (en) * | 2018-06-19 | 2018-09-18 | 四川立地车辆底盘科技有限公司 | The method of suspension gas spring tune rigidity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62103213A (en) * | 1985-10-30 | 1987-05-13 | Atsugi Motor Parts Co Ltd | Car height adjusting device with auxiliary air tank |
| CN2100521U (en) * | 1990-03-07 | 1992-04-01 | 中国人民解放军第二炮兵工程设计研究所 | Vibration damper |
| CN2140446Y (en) * | 1992-04-27 | 1993-08-18 | 张宝全 | Slowly-loosened spring implement |
| 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
- 2011-07-17 CN CN2011101990912A patent/CN102392873A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62103213A (en) * | 1985-10-30 | 1987-05-13 | Atsugi Motor Parts Co Ltd | Car height adjusting device with auxiliary air tank |
| CN2100521U (en) * | 1990-03-07 | 1992-04-01 | 中国人民解放军第二炮兵工程设计研究所 | Vibration damper |
| CN2140446Y (en) * | 1992-04-27 | 1993-08-18 | 张宝全 | Slowly-loosened spring implement |
| 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108528163A (en) * | 2018-06-19 | 2018-09-14 | 四川立地车辆底盘科技有限公司 | Automotive suspension double-capsule variation rigidity gas spring |
| CN108547901A (en) * | 2018-06-19 | 2018-09-18 | 四川立地车辆底盘科技有限公司 | The method of suspension gas spring tune rigidity |
| CN108528163B (en) * | 2018-06-19 | 2019-12-13 | 四川立地车辆底盘科技有限公司 | Automobile suspension double-capsule variable-stiffness gas spring |
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Application publication date: 20120328 |