CN202301720U - Air spring for realizing dynamic rigidity regulation through displacement and realizing pressure limitation impact reduction through one-way valves - Google Patents
Air spring for realizing dynamic rigidity regulation through displacement and realizing pressure limitation impact reduction through one-way valves Download PDFInfo
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- CN202301720U CN202301720U CN2011202516384U CN201120251638U CN202301720U CN 202301720 U CN202301720 U CN 202301720U CN 2011202516384 U CN2011202516384 U CN 2011202516384U CN 201120251638 U CN201120251638 U CN 201120251638U CN 202301720 U CN202301720 U CN 202301720U
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- air
- air chamber
- space
- spring
- way valve
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Abstract
An air spring in an automobile suspension system is very important for improving the automobile smoothness and comfort, protecting roads and cargos and limiting the overload. In order to improve the rigid characteristics of the air spring, people adopt a mode of connecting a main air chamber and a sub air chamber and regulating a throttle opening arranged on a passage to change the pressure difference during the gas flowing between the main air chamber and the sub air chamber. According to a rigidity regulation system, the volume of the air chamber is not changed in the regulating process, so the linearity of the rigidity regulation is great. By aiming at the problem, the utility model invents an air spring for realizing the dynamic rigidity regulation through displacement and realizing the pressure limitation impact reduction through one-way valves. The sub air chamber is separated into several independent air chambers, displacement signals of an air bag are directly used for controlling the opening degree of the throttle openings on the main and sub air chamber passages and the numbers of the sub air chambers, and the dynamic rigidity of the air spring is regulated. The goal of rigidity optimized regulation can also be realized through the volume and number differences of the sub air chambers. When vehicles meet pavement convex blocks, the dynamic rigidity can be automatically reduced, and the impact on vehicle bodies caused by the pavement convex blocks is reduced.
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, and under the effect of spring 5, removable cover 4 contacts and moves up and down with it with push rod 6 all the time.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, two ends are fixed on the inner plane of loam cake plane and upper mounting plate 2 of removable cover 4.Be simplified manufacturing technique, can push rod 6 and upper mounting plate 2 be made into one.
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 (3)
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), and under the acting on 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 outer side wall with one-way valve (8).
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: push rod (6) is made into one with upper mounting plate (2).
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; 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202516384U CN202301720U (en) | 2011-07-17 | 2011-07-17 | Air spring for realizing dynamic rigidity regulation through displacement and realizing pressure limitation impact reduction through one-way valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202516384U CN202301720U (en) | 2011-07-17 | 2011-07-17 | Air spring for realizing dynamic rigidity regulation through displacement and realizing pressure limitation impact reduction through one-way valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202301720U true CN202301720U (en) | 2012-07-04 |
Family
ID=46370625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202516384U Expired - Fee Related CN202301720U (en) | 2011-07-17 | 2011-07-17 | Air spring for realizing dynamic rigidity regulation through displacement and realizing pressure limitation impact reduction through one-way valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202301720U (en) |
-
2011
- 2011-07-17 CN CN2011202516384U patent/CN202301720U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20140717 |
|
| EXPY | Termination of patent right or utility model |