CN106246795B - A kind of stepless adjustable air spring of volume and its control method - Google Patents
A kind of stepless adjustable air spring of volume and its control method Download PDFInfo
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- CN106246795B CN106246795B CN201610641117.7A CN201610641117A CN106246795B CN 106246795 B CN106246795 B CN 106246795B CN 201610641117 A CN201610641117 A CN 201610641117A CN 106246795 B CN106246795 B CN 106246795B
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- piston
- volume
- bent axle
- air spring
- connecting rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses a kind of stepless adjustable air spring of volume and its control methods, including cover board, air bag, the pedestal being fixed on suspension seat, the piston being filled in base intracavity, connecting rod, bent axle and the motor being fixedly connected with vehicle frame, the upper sealing of the air bag is interference fitted with cover board, lower sealing is interference fitted with pedestal and piston more than space perforation lower sealing, the piston pin of the piston is connected by connecting rod with the crankpin of bent axle, and the Motor Control crank rotation simultaneously passes through the volume that connecting rod moves back and forth change air bag with piston in the base.Bent axle, connecting rod and piston mechanism are directly installed on base intracavity in the present invention, it can vertically be moved back and forth up and down in base intracavity in driving stepper motor lower piston, the volume that piston is inswept is equal to air spring volume variable quantity, it sets attached gas chamber that can realize air spring volume again without external, has saved limited suspension installation space.
Description
Technical field
The present invention relates to a kind of vehicle suspension systems, and in particular to a kind of air spring.
Background technology
Air spring is to realize static carrying and the effect of dynamic resilience, tool using the air pressure of seal gas and compressibility
There is the function of mitigating impact, reduce vibration.Regular air spring due in structure once fixation, in application due to not adjustable
Mechanism cannot be adjusted actively, thus be difficult in adapt to complex working condition and changeable running environment, automobile can not be allowed to have good
Riding comfort and operational stability.Therefore, on the basis of regular air spring structure, how to be further improved and design its structure
It is numerous scientific research personnel problem urgently to be resolved hurrily to make it have multiple performance.
Air spring mechanics performance is related with initial gas pressure, effective area, volume and its change rate etc., is understood according to document,
Existing achievement in research is also to conduct a research around these parameters.Considerable part achievement is to regulate and control air spring using air pressure
Mechanical property, i.e., inflation/deflation constantly is carried out to air spring with solenoid valve, although control thinking it is simple, air is continuous
Charge and discharge meeting waste of energy, causes the parts service life such as compressor, solenoid valve to shorten.Also considerable part achievement passes through change
Air spring base exterior shape, to achieve the purpose that improve air spring performance, but base exterior shape is once fixed
It is unable to dynamic regulation.Other achievements are unfolded mainly around the volume of air spring, for example increase several accessory air-spaces, accessory air-space
Gas and air spring in the on-off of gas controlled by solenoid valve, this method is influenced past by accessory air-space number
Toward there is a grade regulation and control, the scheme of comparative maturity is by adjustable for soft, medium, hard three-level, and actual road roughness is to wheel
Excitation be arbitrary excitation, step-less adjustment can just better adapt to condition of road surface, moreover the secondary gas of big air spring volume three times
Many challenges, the originally extremely limited suspension installation space of waste are brought to installation in room.
The content of the invention
Goal of the invention：In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of volume stepless adjustable sky
Gas spring and its control method, without increasing auxiliary chamber, as long as the up and down motion by base intracavity piston, it is possible to realize
The consecutive variations of air spring cavity volume realize the stepless regulated of air spring performance.
Technical solution：A kind of stepless adjustable air spring of volume, including the cover board, air bag, solid being fixedly connected with vehicle frame
Due on suspension seat pedestal, the piston, connecting rod, bent axle and the motor that are filled in base intracavity, the air bag it is upper
Sealing is interference fitted with cover board, and lower sealing is interference fitted with pedestal and piston more than space perforation lower sealing, the work of the piston
Plug pin is connected by connecting rod with the crankpin of bent axle, the Motor Control crank rotation and by connecting rod band piston in pedestal
It is middle to move back and forth the volume for changing air bag.
Further, the base inner wall both sides are equipped with the main shaft neck seat for passing through and rotating for bent axle.
Further, the bent axle is coordinated by the output shaft of gear drive and motor, and crank angle θ turns with output shaft
Angle α meets following relation：
Wherein：Z1For the driving wheel number of teeth, Z2For driven tooth number.
Further, when the crankpin of the bent axle turns to lowest order, piston reaches lower limit, and the corner of bent axle is at this time
0 degree, the volume variation of air bag is 0；When the crankpin of the bent axle turns to highest order, piston reaches upper limit, at this time bent axle
Corner for 180 degree, the volume variation of air bag is maximum.
Further, the statistics variations amount Δ V and crank angle θ of air bag meet following relational expression：
Wherein, AeffFor the geometric area of piston crown upper surface, R is crank throw, is λ crankshaft-link rods ratio.
A kind of control method of the stepless adjustable air spring of volume, comprises the following steps：
(1) in vehicle travel process, air spring air pressure inside and Vehicle Speed are gathered；
(2) corresponding air spring volume when finding vehicle body vertical acceleration minimum according to air pressure and speed；
(3) control motor counterclockwise or rotating clockwise makes bent axle rotation drive connecting rod that piston is promoted to move up or down
Make, with the volume inside this regulating piston upper space communicated air bags.
Further, the air spring volume and the difference of present air spring volume that step (2) is calculated are Δ V, root
Crank angle θ is calculated according to the relation of Δ V and crank angle θ, according to the relation between crank angle θ and motor output Shaft angle α,
Motor output Shaft angle α is obtained, the rotational angle of motor output shaft is controlled according to α.
Advantageous effect：1st, bent axle, connecting rod and piston mechanism are directly installed on base intracavity in the present invention, are driven in stepper motor
Dynamic lower piston can vertically be moved back and forth up and down in base intracavity, and the volume that piston is inswept changes equal to air spring volume
Amount sets attached gas chamber that can realize air spring volume, has saved limited suspension installation space again without outside.
2nd, the present invention on the basis of existing air spring constructions, achieved that by improving understructure, have cost it is small,
And performance the advantages of effectively improving.
3rd, the up and down motion of the invention by realizing piston to the control of stepper motor direction of rotation, conduction time length,
Piston-swept volume consecutive variations so that air spring volume variable quantity is stepless adjustable.
Description of the drawings
Fig. 1 is the structure diagram of air spring of the present invention；
Fig. 2 is the structure diagram of executing agency of the present invention；
Fig. 3 is structure chart when inventive piston is located at lower limit；
Fig. 4 is structure chart when inventive piston is located at upper limit；
Fig. 5 is the relation schematic diagram that bag volume variable quantity changes with crank angle；
Fig. 6 is the full-vehicle control schematic diagram of air spring of the present invention when in use.
Specific embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
Embodiment：A kind of stepless adjustable air spring of volume, as shown in Figure 1, 2, including cover board 1, rubber pneumatic bag 2, bottom
Seat 3, piston 4, connecting rod 5, bent axle 6, driven gear 7, driving gear 8 and stepper motor 9.The top surface of cover board 1 passes through bolt 1a
It is fixedly connected on vehicle frame 10, the bottom surface of cover board 1 is a connecting cylinder 1c, and the outer surface of cylinder 1c on rubber pneumatic bag 2 with sealing
The inner headed face of mouth 2a is interference fit.Pedestal 3 is cylindrical frame structure, and bottom is along the hollow ring 3f of axis perforation, the circle
The periphery of ring 3f is interference fitted with the inner headed face of 2 lower sealing 2b of rubber pneumatic bag, and the bottom of pedestal 3 is fixed by bolt of lower base 3d
In on the spring base 12 of axle 11.
Piston 4 is made of piston only 4a, piston pin 4b and piston ring 4c, is filled in the cylindrical inner chamber of pedestal 3, and can
It moves up and down between 4 upper and lower limit 4e, 4d of piston, the lower sealing 2b of direction of motion face air bag 2.Piston pin 4b is equipped with
The connecting rod 5 extended downwardly, the microcephaly of piston pin connection connecting rod 5, the other end major part of connecting rod 5 and the bent axle pin connection of bent axle 6, it is bent
One end of axis 6 is mounted on by trunnion flap 3c and flap bolt 3d in the main shaft neck seat 3b on 3 inner wall of pedestal, and the other end is worn
Another main shaft neck seat 3b for crossing in 3 opposed inner walls of pedestal is simultaneously extend horizontally away outside pedestal 3.
6 end of bent axle for stretching out pedestal 3 is equipped with driven gear 7, and the driving gear 8 engaged with driven gear 7 is mounted on
On the output shaft of stepping motor 9, stepping motor 9 start rotation drive master gear rotate 8, engaged with driving gear 8 from
Moving gear 7 also rotates, and can be rotated with dynamic crankshaft 6 so that does reciprocal up and down motion with the connecting rod 5 of bent axle pin connection, promotes
Piston 4 is acted along the inner wall of pedestal, and the space of 4 top of piston and 2 lower sealing 2b of air bag perforations belongs to the volume of air spring, i.e.,
Size changes therewith.The rotational angle theta of bent axle 6 meets following relation with output shaft angle α：
Wherein：Z1For 8 number of teeth of driving gear, Z2For 7 number of teeth of driven gear.
When piston 4 moves to lower limit 4d, as shown in figure 3, during 5 concentric reducer central point line of connecting rod and pedestal 3 are vertical
The heart overlaps, and 4 head top surface of piston is minimum with a distance from 6 trunnion of bent axle, by piston 4 air spring volume knots modification is made to be 0.It adjusts
During control, after 9 output shaft of stepping motor drives driving gear 8 to rotate, the driven gear 7 engaged with driving gear 8 is with dynamic crankshaft 6
Rotation drives connecting rod 5 to move so that piston 4 is moved down along 3 inner wall of pedestal, until reaching at 4 lower limit 4d positions of piston
When motor 9 stopping action, it is specified that 6 corner of bent axle at this time is 0 degree, it is 0 that piston, which sweeps 4 and crosses volumes,.
When piston 4 moves to upper limit 4e, as shown in figure 4, during 5 concentric reducer central point line of connecting rod and pedestal 3 are vertical
Heart line overlaps, and 4 head top surface of piston is maximum with a distance from 6 trunnion of bent axle, makes air spring volume knots modification most by piston 4
Greatly.During regulation and control, after 9 output shaft of stepping motor drives driving gear 8 to rotate, the driven gear 7 engaged with driving gear 8 drives
Bent axle 6 rotates, and connecting rod 5 is driven to move so that piston 4 is moved up along 3 inner wall of pedestal, until reaching 4 upper limit of piston 4e
, it is specified that 6 corner of bent axle at this time is 180 degree, 4 sweep volume of piston is maximum for 9 stopping of stepping motor action when putting place.
When piston 4 is moved when between lower limit 4d and upper limit 4e, 5 concentric reducer of connecting rod, two central point line and bottom
3 vertical center lines of seat into the angle more than 0,4 sweep volume of piston between 0 and maximum, specific size and with 4, piston
Portion's area, 6 radius of bent axle, 6 connecting rod ratio of bent axle and 6 corner of bent axle determine.Air spring volume variable quantity is with bent axle 6 in the present invention
The relation of corner is as shown in figure 5, wherein longitudinal direction mark Δ V is expressed as volume variable quantity, and abscissa is 6 rotational angle theta of bent axle, excursion
From 0 degree to 180 degree.As can be seen that air spring volume change curve is to progressively increase to maximum from 0 from 0 degree to 180 degree,
Feature meets following relation
In formula, AeffThe geometric area of piston crown upper surface, R crank throws, λ crankshaft-link rods ratio, θ is crank angle.
The Full Vehicle System of four air spring suspensions of the present invention is configured as shown in fig. 6, four air springs are separately mounted to
Front and rear axle both ends, four stepping motors 9 are powered by vehicle power supply 13, and are passed through signal wire and be connected with controller 14 and controlled by it
System, control input signal are passed by being arranged in the vehicle speed sensor 15 of pilot set, being arranged in gas pressure in air spring
Sensor 16,6 rotary angle transmitter 17 of bent axle are gathered.9 rotational angle theta scope of stepping motor is defined, it is specified that in piston 4 in advance
Stepping motor 9 can only rotate counterclockwise during lower limit 6d, and initial rotational angle theta is arranged to 0 degree；In 4 upper limit 6e steppings of piston
Motor 9 can only rotate clockwise, and rotational angle theta is up to 180 degree；For piston 4 in other positions, stepping motor 9 both can be with the inverse time
Pin rotation can also rotate clockwise.When developing controller 14, by laboratory vehicle according to vehicle speed sensor 15, air spring gas
The acquisition signal of pressure sensor searches out the air spring internal capacity corresponding to vehicle body vertical acceleration minimum, and electricity is made
Sub-table deposits in the storage element of controller.Before vehicle traveling, inflation/deflation is carried out to air spring by air inlet-outlet pipe 1b, is reached
The passage of air inlet-outlet pipe 1b will be closed after to condition；Air spring is remained off in vehicle travel process, air inlet-outlet pipe 1b,
And specifically control process：Air spring air pressure inside signal, the speed letter of vehicle speed sensor 15 are gathered according to pressure sensor 16
Number, the data with being pre-stored in ROM are matched, and find the air spring volume corresponding to current vehicle speed, controller 14 can
To calculate crank angle θ according to the relation of Δ V and crank angle θ, according between crank angle θ and motor output Shaft angle α
Relation obtains motor output Shaft angle α, by relay group 18 to four simultaneously or some motor 9 therein or single
9 output shaft angle of direction of rotation and stepping motor solely controlled.Different control strategies is equipped with, except air spring holds
Product can also realize various other control effects, for example quickly reduce front overhang in emergency braking outside can changing with speed
The air spring volume of frame can make vehicle body preferably antidive, also have steering wheel big corner that can reduce outboard wheels overhead
Gas spring volume can make vehicle body have smaller side inclination angle.
For different speed and road conditions, due to can in real time be monitored to speed by vehicle speed sensor 15,
Vehicle can be caused initiatively to change each air spring volume using controller 14 according to traveling road conditions condition, reach raising vehicle
The requirement of ride comfort and handling stability.
Claims (3)
1. a kind of control method of the stepless adjustable air spring of volume, it is characterised in that：Air spring includes fixing with vehicle frame
Cover board, air bag, the pedestal being fixed on suspension seat, the piston being filled in base intracavity, connecting rod, bent axle and the electricity of connection
Motivation, upper sealing and the cover board of the air bag are interference fitted, and lower sealing is interference fitted with pedestal and under the perforation of piston more than space
Sealing, the piston pin of the piston are connected by connecting rod with the crankpin of bent axle, and the Motor Control crank rotation simultaneously passes through
Connecting rod moves back and forth the volume for changing air bag with piston in the base；
The bent axle is coordinated by the output shaft of gear drive and motor, and crank angle θ and output shaft angle α satisfactions are as follows
Relation：
Wherein：Z1For the driving wheel number of teeth, Z2For driven tooth number；
The statistics variations amount Δ V and crank angle θ of the air bag meet following relational expression：
Wherein, AeffFor the geometric area of piston crown upper surface, R is crank throw, and λ is crankshaft-link rod ratio；
Control method comprises the following steps：
(1) in vehicle travel process, air spring air pressure inside and Vehicle Speed are gathered；
(2) corresponding air spring volume, is calculated when finding vehicle body vertical acceleration minimum according to air pressure and speed
The difference of air spring volume and present air spring volume is Δ V, and calculating bent axle according to the relation of Δ V and crank angle θ turns
Angle θ according to the relation between crank angle θ and motor output Shaft angle α, obtains motor output Shaft angle α, is controlled according to α
The rotational angle of motor output shaft；
(3) control motor counterclockwise or rotating clockwise makes bent axle rotation drive connecting rod that piston is promoted to act up or down, with
Volume inside this regulating piston upper space communicated air bags.
2. the control method of the stepless adjustable air spring of volume according to claim 1, it is characterised in that：The pedestal
Inner wall both sides are equipped with the main shaft neck seat for passing through and rotating for bent axle.
3. the control method of the stepless adjustable air spring of volume according to claim 1, it is characterised in that：The bent axle
Crankpin when turning to lowest order, piston reaches lower limit, and the corner of bent axle is 0 degree at this time, and the volume variation of air bag is 0；
When the crankpin of the bent axle turns to highest order, piston reach upper limit, at this time the corner of bent axle be 180 degree, the appearance of air bag
Product variation is maximum.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610641117.7A CN106246795B (en) | 2016-08-05 | 2016-08-05 | A kind of stepless adjustable air spring of volume and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610641117.7A CN106246795B (en) | 2016-08-05 | 2016-08-05 | A kind of stepless adjustable air spring of volume and its control method |
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| CN106246795A CN106246795A (en) | 2016-12-21 |
| CN106246795B true CN106246795B (en) | 2018-05-22 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107717268A (en) * | 2017-10-13 | 2018-02-23 | 江苏秉宸科技有限公司 | A kind of solar energy welding strip soaking tool |
| CN109083964B (en) * | 2018-08-31 | 2020-11-24 | 江苏科技大学 | Air spring volume adjusting mechanism and application and control method thereof |
| CN109109604A (en) * | 2018-08-31 | 2019-01-01 | 江苏科技大学 | A kind of air spring volume adjustment mechanism and its control method |
| CN110667329B (en) * | 2019-10-15 | 2022-03-22 | 安徽安凯汽车股份有限公司 | Passenger car air suspension air bag pressure adjusting device and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB870826A (en) * | 1958-12-11 | 1961-06-21 | Armstrong Patents Co Ltd | Improvements in or relating to hydro-pneumatic suspension systems |
| CN1706679A (en) * | 2004-06-04 | 2005-12-14 | 丰田自动车株式会社 | Hydraulic controller |
| CN101694237A (en) * | 2009-10-20 | 2010-04-14 | 杨国建 | Energy consumption free reducer |
| CN102401062A (en) * | 2011-06-21 | 2012-04-04 | 贺劼 | Composite air spring formed by combining airbag with built-in external adjusting piston |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59103044A (en) * | 1982-12-02 | 1984-06-14 | Nissan Motor Co Ltd | Power unit mounting device |
-
2016
- 2016-08-05 CN CN201610641117.7A patent/CN106246795B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB870826A (en) * | 1958-12-11 | 1961-06-21 | Armstrong Patents Co Ltd | Improvements in or relating to hydro-pneumatic suspension systems |
| CN1706679A (en) * | 2004-06-04 | 2005-12-14 | 丰田自动车株式会社 | Hydraulic controller |
| CN101694237A (en) * | 2009-10-20 | 2010-04-14 | 杨国建 | Energy consumption free reducer |
| CN102401062A (en) * | 2011-06-21 | 2012-04-04 | 贺劼 | Composite air spring formed by combining airbag with built-in external adjusting piston |
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| CN106246795A (en) | 2016-12-21 |
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Application publication date: 20161221 Assignee: Jiangsu University of Science and Technology Technology Transfer Center Co.,Ltd. Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2022980022975 Denomination of invention: A kind of air spring with stepless adjustable volume and its control method Granted publication date: 20180522 License type: Common License Record date: 20221128 |
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Assignee: Jiangsu University of Science and Technology Technology Transfer Center Co.,Ltd. Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2022980022975 Date of cancellation: 20230310 |