CN106926899A - A kind of vibration absorber for suppressing automobile steering roller multiple limits ring self-excitation - Google Patents
A kind of vibration absorber for suppressing automobile steering roller multiple limits ring self-excitation Download PDFInfo
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- CN106926899A CN106926899A CN201710159074.3A CN201710159074A CN106926899A CN 106926899 A CN106926899 A CN 106926899A CN 201710159074 A CN201710159074 A CN 201710159074A CN 106926899 A CN106926899 A CN 106926899A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/22—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system
- B62D7/228—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system acting between the steering gear and the road wheels, e.g. on tie-rod
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Abstract
The present invention relates to a kind of vibration absorber for suppressing automobile steering roller multiple limits ring self-excitation.Including a pair of start and stop mechanisms, damper and os；The start and stop oil cylinder etc. of every start and stop mechanism including closing, the cylinder body of start and stop oil cylinder it is in parallel magnetic valve；One end of start and stop oil cylinder is provided with linking arm；Damper is variable cross-section damper；Damper and o are connected to a pair of start and stop mechanisms in parallel connection.When using, the installation end of a pair of piston rods of start and stop mechanism respectively connected the left steering section and right turn section of steering axle of automobile.When there is multiple limits ring self-excitation in automobile; damper, o and a pair of the two of start and stop mechanism magnetic valves obtain electric simultaneously; lateral stiffness is adjusted by o, it is shimmy to suppress deflecting roller multiple limits ring that horizontal damping is adjusted by damper；If shimmy be suppressed, vibration absorber power-off is stopped.
Description
Technical field
The invention belongs to motor turning antivibration area, and in particular to a kind of motor turning vibration absorber.
Background technology
Automobile is a mechanical system for complexity, and various vibrations and noise inevitably occur in the process of moving,
Shimmy of Automotive Steering Wheels is then a kind of situation for having serious harm to vehicle various aspects of performance.
It is shimmy be divided into force shimmy and self-excitation.At present, with the raising of manufacturing process, obsessional type is shimmy can be passed through
Dynamic balancing to tire is solved；And pair and self-excitation, if not accounting for this factor in the design phase, pendulum
It is relatively difficult that generation of shaking will suppress self-excitation later.
Domestic and foreign scholars numerous studies show that automobile occurs self-excitation, belong to the Hopf forks in nonlinear kinetics
The Limit Cycle Phenomena of initiation.Automobile Shimmy is likely to occur single limit cycle and multiple limits ring phenomenon, i.e. shimmy generation Hopf forks and
The Hopf forks of degeneration.It is shimmy that shimmy amplitude is unrelated with initial excitation size when single limit cycle occur and responding, big excitation with it is small
Excite identical amplitude shimmy；Big when there is the response of multiple limits ring to encourage generation significantly shimmy, small excitation produces small size shimmy.
It is increasingly complex that multiple limits ring self-excitation phenomenon causes that shimmy mechanism becomes, once occurring, the big solution of harm is difficult.
Damper is generally mounted in steering system, and one end is arranged on vehicle body or vehicle frame, and the other end is arranged on and turns to
On the part moved in transmission mechanism, but current steering mechanism uses electronic-controlled power steering mostly, using electronic-controlled power steering just
Impact can be reduced, vibration is relaxed, thus it is not especially many that this kind of damper uses in practice.And existing skill
Art there is also some problems, such as a kind of vibration damping steering linkage, but vibration isolation rubber is simply added in steering linkage, can absorb
The impulsive force on steering wheel is delivered to reduction deflecting roller, it is actual to solve the problems, such as steering-wheel flutter.A kind of damper,
But only it is that a hydraulic damper is hinged between propons and steering drag link, though can to a certain extent suppress deflecting roller pendulum
Shake, but cannot actively continuously adjust damping, so having certain limitation.
The content of the invention
In order to realize actively continuous suppression steering-wheel flutter, present invention offer is a kind of to suppress automobile steering roller multiple limits ring certainly
Swash shimmy vibration absorber.
A kind of vibration absorber for suppressing automobile steering roller multiple limits ring self-excitation includes a pair of start and stop mechanisms 4, dampers 5
With o 10；
Every start and stop mechanism includes start and stop oil cylinder 42, piston 45 and the piston rod 41 of closing, and piston 45 is located at start and stop oil cylinder
In 42, piston rod 41 is overhanging, and overhanging piston rod 41 is installation end；The cylinder body of the start and stop oil cylinder 42 it is in parallel magnetic valve 11；
One end of start and stop oil cylinder 42 is provided with linking arm 46；
The damper 5 is variable cross-section damper, realizes changing damping force by electromagnetic action；
The o 10 obtains electric, realizes the adjustable spring function of rigidity；
The fixing end of the damper 5 and the output end of o 10 respectively connected a connection for start and stop mechanism
The two ends of arm 46, the mobile terminal of damper 5 and the input of o 10 respectively connected the company of another start and stop mechanism
The two ends of arm 46 are connect, makes damper 5 and o 10 be in parallel connection；
When using, the installation end of a pair of piston rods of start and stop mechanism 41 respectively connected steering axle of automobile left steering section and
Right turn section；When there is multiple limits ring self-excitation in automobile, damper 5, o 10 and a pair of start and stop mechanisms
Two magnetic valves 11 simultaneously it is electric, turn to vibration absorber start working.
The technical scheme for further limiting is as follows：
The start and stop oil cylinder 42 is closed piston oil-cylinder, and axial one end of cylinder body is connected to linking arm 46；Linking arm 46
It is lath-shaped, two ends are overhanging along the radial direction of cylinder body；The overhanging end of piston rod is located at the outside of the axial other end of cylinder body.
The magnetic valve 11 is 2/2-way normally open type magnetic valve；Offered respectively on the cylinder body of the start and stop oil cylinder 42 into
Oilhole 43 and oil outlet 44, magnetic valve 11 are connected in parallel between fuel feed hole 43 and oil outlet 44；Magnetic valve 11 powers off damper
When not working, magnetic valve 11 is normally opened, the oil communication between fuel feed hole 43 and oil outlet 44 on start and stop oil cylinder 42；Magnetic valve 11
When must be electrically turn off, the oil circuit between fuel feed hole 43 and oil outlet 44 on start and stop oil cylinder 42 is blocked, piston rod 41 and piston 45
Position is fixed, and by access steering, damper is started working for start and stop mechanism；After shimmy disappearance, shock absorber start and stop
Mechanism is powered off, and the power-off of magnetic valve 11 is opened, and damper disconnects with the connection of steering.
The damper 5 includes cylinder barrel 52, sliding plunger 51, damping piston mechanism and damping piston-rod 55, damping piston
Mechanism is connected to one end of damping piston-rod 55, and the other end of damping piston-rod 55 is extended outside cylinder barrel 52；Sliding plunger 51
In in the rodless cavity of cylinder barrel 52；
The damping piston mechanism includes damping piston 53, and the middle part of damping piston 53 is connected to damping by rod aperture
One end of piston rod 55, is connected with central gear 537, with center on the one end for the damping piston-rod 55 being connected with damping piston 53
The engagement of gear 537 is provided with three tooth bars；
The first tooth bar 534 is main carry-over bar in three tooth bars, and the tooth bar end material of first tooth bar 534 is magnetic
Material；Second tooth bar 535 and the 3rd tooth bar 536 are driven tooth bar, and electricity is provided with the corresponding damping piston 53 of the first tooth bar 534
Magnet 532；First tooth bar 534, the second tooth bar 535 and the 3rd tooth bar 536 are rotated on damping piston 53；With the first tooth bar
534th, three openings 533 are offered respectively on the second tooth bar 535 and the corresponding damping piston 53 of the 3rd tooth bar 536；Electromagnet
532 obtain electric the first tooth bar 534 that passes through drives central gear 537 to rotate, then drives the second tooth bar 535 and the 3rd tooth bar 536 synchronous
Rotate, change three real work areas of opening 533, realize the continuous change of the damping force of damper 5.
The periphery of the rod aperture of the one side of the damping piston 53 is provided with isosceles triangle groove 539, with isosceles triangle groove 539
Locating piece 5342 is respectively equipped with corresponding three tooth bars, the locating piece 5342 on three tooth bars corresponds to recessed positioned at isosceles triangle respectively
In groove 539, realize to three restrictions of racks turn scope.
The locating piece 5342 is L-shaped block, wherein a upright side is connected to corresponding tooth bar.
First tooth bar 534, the second tooth bar 535 and the 3rd tooth bar 536 are structure identical fan blades shape, and one end is tooth
Bar, the other end is flexibly connected end and is flexibly connected damping piston 53 to be flexibly connected end.
Applicability of the present invention is wide, such as a certain vehicle, kinetic model is set up by sample car of this vehicle, and further
The steering-wheel flutter differential equation is set up, fork interval of the steering-wheel flutter with speed is found with simulating analysis, in this area
It is interior by the uniform discretization of speed, the resistance that can suppress that limit cycle is shimmy, multiple limits ring is shimmy is found out by adjusting parameter
, then be stored in for this volume of data standby as primary data in controller by Buddhist nun and rigidity.When automobile actually road travels,
If shimmy sensor detects automobile shimmy, vibration absorber start-up operation of the present invention occurs, be given in advance according to corresponding speed
Whether the rigidity of setting and damping, see can suppress shimmy, if can if terminate, if can not suppress it is shimmy if coordinate increase rigidity and
Damping, until can suppress shimmy, then by rigidity now and damping feeding controller memory space corresponding with speed, with reality
Now according to the different real-time update data of vehicle behaviour in service.
Steering-wheel flutter simple model specifically is set up by sample car of certain domestic Motor Vehicle with Independent Suspension, three is reduced to freely
Degree mechanical model, as shown in figure 9, θ1、θ2It is right left steering wheel around stub pivot angle, y is rack displacement.With Lagrange's equation
Derive that the kinematics differential equation is：
I2θ2″+(ct+c2l2(cos(γ)sin(β))2)θ2′+k2l2(cos(γ)sin(β))2θ2-c2lcos(γ)sin
(β)y′-k2lcos(γ)sin(β)cos(λ)y+T2(Rγ+n)-FxLcos(γ)+M2=0
m0y″+(c1(cos(λ))2+c2(cos(λ))2+c3)y′+(k1(cos(λ))2+k2(cos(λ))2+k3)y-c1lcos
(γ)sin(β)cos(λ)θ1′-k1lcos(γ)sin(β)cos(λ)θ1-c2lcos(γ)sin(β)cos(λ)θ2′-k2lcos
(γ)sin(β)cos(λ)θ2=0
In formula (1)：
I1It is off-front wheel around the rotary inertia of stub；I2It is the near front wheel around the rotary inertia of stub；m0It is rack mass；k1
For the horizontal drawing of left steering is just spent；k2It is right turn drag link rigidity；k3It is rack and pinion engagement rigidity；c1For right drag link etc.
Effect damping；c2It is the equivalent damping of left drag link；c3It is rack and pinion engagement equivalent damping；ctWheel is around stub when angulation hinders
Buddhist nun；R is the rolling radius of tire；L is knuckle arm effective length；L is left and right drag link length；F is coefficient of rolling resistance；γ
It is castor；N is pneumatic trail；β is knuckle arm and track rod angle；λ is tooth bar and track rod angle；
V is Vehicle Speed；T1It is the dynamic lateral deviation power of right wheel；T2It is the dynamic lateral deviation power of revolver；FxLongitudinally hindered suffered by front-wheel
Power；α1It is off-front wheel side drift angle；α2It is front left wheel side drift angle；A is the length of tire print half；σ is tire relaxed length；M1It is the right side
Wheel is converted to the dry friction at stub；M2The dry friction at stub is converted to for revolver；M1、M2From sluggish ring model；
Side force T considers the influence of coefficient of road adhesion using simplified tire magic formula：
Ti=Dsin (Ci(arctan(Biαi-Ei(Biα-arctan(Biαi))))) (2)
Wherein：
In formula (2), (3)：
Bi、Ci、Di、EiStiffness factor, form factor, peak factor, curvature respectively in side force magic formula because
Son；a1、a2、a3、a4、a5、a6、a7、a8It is the parameter obtained by experimental fit；
Simulink models are built in Matlab according to above-mentioned equation (1), (2), (3), by the items ginseng of sample car model
Simulation analysis are carried out in number input Matlab, forks of the front-wheel pivot angle θ with travel speed V is drawn with the picture function of Matlab
Figure, gives shimmy system different initial excitations, it can be deduced that shimmy interval, the shimmy interval of multiple limits ring of single limit cycle, in hair
In the shimmy speed interval of life, continuous speed uniform discrete, then in each discrete point, increases in shimmy model
One lateral stiffness and damping, coordinate adjustment lateral stiffness and damping, until by shimmy suppression within the acceptable range, then
The rigidity and damping for corresponding to this speed are recorded, the adjustment work of next discrete point is carried out after the completion of the work of this discrete point again
Make, until adjust and finish and record corresponding data the discrete point diverged in interval one by one, then using these data as initial
It is standby that data deposit into controller.When automobile actually road travel when, shimmy detector detect vehicle occur it is shimmy, then the present invention
Vibration absorber is started working, the signal deciding that controller is sent according to the vehicle speed sensor K to be exported (rigidity), C (damping) value,
Size of current, direction and the supply of controllable electric power supply o are determined by required K (rigidity), C (damping) values
The size of current of variable cross-section damper.Then detect shimmy whether be suppressed in acceptable scope by angular transducer
Interior, if shimmy suppressed, active damper is stopped, if shimmy be not suppressed within the acceptable range,
Coordinate increase K (rigidity), C (damping) value, until by it is shimmy suppress within the acceptable range, then by K (rigidity) now,
C (damping) value is stored in controller.Because with the use of automobile, its parameters is change, and this also may result in shimmy spy
The change of property, above-mentioned flow can solve this problem, be updated the data at any time according to automobile actual conditions and operating mode.
Table 1 corresponds to the damping stiffness pivot angle value of shimmy speed
| V(km/h) | 39.6 | 41.4 | 43.2 | 45.0 | 46.8 | 48.6 | 50.4 | 52.2 | 54.0 | 57.6 | 61.2 |
| θ(°) | 0.83 | 5.44 | 6.18 | 6.63 | 6.93 | 7.14 | 7.27 | 7.34 | 7.36 | 7.29 | 7.09 |
| θ′(°) | 0.82 | 0.85 | 1.02 | 0.99 | 0.99 | 0.99 | 0.98 | 0.99 | 1.02 | 7.29 | 7.09 |
| K(KN/m) | 35.0 | 37.5 | 39.9 | 42.4 | 44.7 | 46.9 | 48.8 | 50.5 | 51.8 | 53.3 | 53.0 |
| C(N*m*s/rad) | 10.0 | 10.7 | 11.4 | 12.1 | 12.8 | 13.4 | 13.9 | 14.4 | 14.8 | 15.3 | 15.7 |
| θ″(°) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| V(km/h) | 64.8 | 66.6 | 68.4 | 70.2 | 72 | 73.8 | 75.6 | 77.4 | 79.2 | 81 | |
| θ(°) | 6.78 | 6.59 | 6.36 | 6.11 | 5.82 | 5.48 | 5.09 | 4.61 | 3.83 | 0.76 | |
| θ′(°) | 1.01 | 0.96 | 0.94 | 0.91 | 0.89 | 0.88 | 0.91 | 0.91 | 0.82 | 0.73 | |
| K(KN/m) | 51.2 | 49.8 | 48.2 | 46.4 | 44.4 | 42.4 | 40.5 | 38.3 | 36.6 | 35.0 | |
| C(N*m*s/rad) | 15.9 | 15.7 | 15.5 | 14.8 | 13.2 | 12.1 | 11.6 | 10.9 | 10.4 | 10.0 | |
| θ″(°) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Data are drawn by a large amount of simulation analysis in table 1, including the deflecting roller pivot angle under different initial excitation values, accordingly
Corresponding to friction speed, calculated by experimental analysis, there is corresponding rigidity value K, damping value C to correspond to therewith.θ refers in table
The produced small Limit Cycle Amplitude under small excitation state of deflecting roller, θ ' refers to produced big limit cycle width under big excitation
Value, the different travel speed of correspondence, steering-wheel flutter amplitude is different, and this also allows for needing steering vibration absorber to provide different
Stiffness K and damping C, θ " refers to the shimmy amplitude of deflecting roller, it can be seen that damper works after turning to vibration absorber work
Afterwards, the shimmy of deflecting roller has been effectively suppressed.From fig. 9, it can be seen that suitable rigidity value K, damping value C can effectively suppress to turn
It is shimmy to taking turns.Rigidity value K in table 1, damping value C are taken out, and itself and speed are corresponded can draw K-V figures (Figure 10),
C-V schemes (Figure 11), and image trend is all first increases and then decreases, and this always, illustrates that shimmy angle is got over θ-V bifurcation graphs (Fig. 9) tendency
Greatly, the corresponding additional stiffness for turning to the required offer of vibration absorber, damping are bigger.
Advantageous Effects of the invention embody in the following areas：
1. the present invention can decide whether to access steering according to the situation of deflecting roller.When using, the present invention is transversely mounted
Between two knuckles in left and right, the continuously adjustabe of rigidity and damping is capable of achieving, be powered work when occurring shimmy, after shimmy elimination
Power-off, saves energy.
2. the present invention is powered by controllable electric power, realizes the continuously adjustabe of rigidity and damping.
3. simple structure of the present invention, low production cost is applied widely.
4. the present invention is suitable for different automobile types and the automobile of different behaviours in service.
Brief description of the drawings
Fig. 1 is use state figure of the present invention.
Fig. 2 is the structural representation of damper.
Fig. 3 is damping piston mechanism explosive view.
Fig. 4 is damping piston sectional view.
Fig. 5 is rack structure schematic diagram.
Fig. 6 is shock absorber start and stop mechanism sectional view；
Fig. 7 is shock absorber start and stop mechanism axonometric drawing；
Fig. 8 is present invention independent suspension sample car kinetic model sketch used.
Fig. 9 be independent suspension sample car front-wheel pivot angle with speed bifurcation graphs (chain-dotted line represent initial excitation as 10 ° when point
Trouble figure, dotted line represent initial excitation as 2 ° when bifurcation graphs, solid line represent adjustment rigidity and damping after bifurcation graphs).
Figure 10 is K-V curve maps expected from Motor Vehicle with Independent Suspension.
Figure 11 is C-V curve figure expected from Motor Vehicle with Independent Suspension.
Sequence number in upper figure：1 outer semiaxis, 2 constant velocity cardan joints, 3 left steering sections, 4 start and stop mechanisms, 5 dampers, 6 driving axle housings,
7 right turn sections, 8 right turn wheels, 9 inner shafts, 10 os, 11 magnetic valves, 12 linking arms, 13 left steering wheels, 41 pistons
Bar, 42 cylinder bodies, 43 fuel feed holes, 44 oil outlets, 45 pistons, 46 linking arms, 51 sliding plungers, 52 cylinder barrels, 53 damping pistons, in 54
Chamber, 55 damping piston-rods, 531 flat head screws, 532 electromagnet, 533 openings, 534 first tooth bars, 535 second tooth bars, 536
Three tooth bars, 537 central gears, 538 wind springs, 539 isosceles triangle grooves, 5341 magnetic materials, 5342 limited blocks.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is further described by embodiment.
Referring to Fig. 1, a kind of vibration absorber of suppression automobile steering roller multiple limits ring self-excitation includes a pair of start and stop mechanisms
4th, damper 5 and o 10.
Referring to Fig. 6, every start and stop mechanism includes closed piston oil-cylinder, specially start and stop oil cylinder 42, piston 45 and piston
Bar 41, piston 45 is located in start and stop oil cylinder 42, and piston rod 41 is overhanging, and overhanging piston rod 41 is installation end.Start and stop oil cylinder 42
Cylinder body it is in parallel magnetic valve 11；One end of start and stop oil cylinder 42 is provided with linking arm 46, and referring to Fig. 7, axial one end of cylinder body is connected to
Linking arm 46；Linking arm 46 is lath-shaped, and two ends are overhanging along the radial direction of cylinder body；The overhanging end of piston rod is located at the axially another of cylinder body
The outside of one end.
Offer fuel feed hole 43 and oil outlet 44, magnetic valve 11 respectively referring to Fig. 6 and Fig. 7, on the cylinder body of start and stop oil cylinder 42
It is connected in parallel between fuel feed hole 43 and oil outlet 44；Magnetic valve 11 is 2/2-way normally open type magnetic valve.The power-off of magnetic valve 11 is turned to
When shock absorber does not work, magnetic valve 11 is normally opened, the oil communication between fuel feed hole 43 and oil outlet 44 on start and stop oil cylinder 42；Electricity
When magnet valve 11 must be electrically turn off, the oil circuit between fuel feed hole 43 and oil outlet 44 on start and stop oil cylinder 42 is blocked, piston rod 41 with
The position of piston 45 is fixed, and by access steering, damper is started working for start and stop mechanism；After shimmy disappearance, vibration damping
Device start and stop mechanism is powered off, and the power-off of magnetic valve 11 is opened, and damper disconnects with the connection of steering.
Referring to Fig. 2, damper 5 is variable cross-section damper, realizes changing damping force by electromagnetic action.Damper 5 includes
Cylinder barrel 52, sliding plunger 51, damping piston mechanism and damping piston-rod 55, damping piston mechanism are connected to damping piston-rod 55
One end, the other end of damping piston-rod 55 is extended outside cylinder barrel 52；Sliding plunger 51 is located in the rodless cavity of cylinder barrel 52.
Referring to Fig. 3, damping piston mechanism includes damping piston 53, and the middle part of damping piston 53 is connected to by rod aperture
One end of damping piston-rod 55, central gear 537 is connected with the one end for the damping piston-rod 55 being connected with damping piston 53, with
The engagement of central gear 537 is provided with three tooth bars.Referring to Fig. 3 and Fig. 4, the periphery of the rod aperture of the one side of damping piston 53 is provided with
Isosceles triangle groove 539, referring to Fig. 5, locating piece 5342 is respectively equipped with 539 corresponding three tooth bars of isosceles triangle groove, positioning
Block 5342 is L-shaped block, wherein a upright side is connected to corresponding tooth bar.Locating piece 5342 on three tooth bars is corresponded to respectively
In isosceles triangle groove 539, realize to three restrictions of racks turn scope.
First tooth bar 534, the second tooth bar 535 and the 3rd tooth bar 536 are structure identical fan blades shape, and one end is tooth bar, separately
One end is flexibly connected end and is flexibly connected damping piston 53 to be flexibly connected end.Wherein the first tooth bar 534 is main carry-over bar, the
The tooth bar end material of one tooth bar 534 is magnetic material 5341；Second tooth bar 535 and the 3rd tooth bar 536 are driven tooth bar, with first
Electromagnet 532 is installed on the corresponding damping piston 53 of magnetic material 5341 on tooth bar 534.First tooth bar 534, the second tooth bar
535 and the 3rd tooth bar 536 rotated by flat head screw 531 and be installed on damping piston 53；With the first tooth bar 534, the second tooth bar
535 and the corresponding damping piston 53 of the 3rd tooth bar 536 on offer three openings 533 respectively；Electromagnet 532 electric pass through the
One tooth bar 534 drives central gear 537 to rotate, then drives the second tooth bar 535 and the synchronous axial system of the 3rd tooth bar 536, changes three
The real work area of opening 533, realizes the continuous change of the damping force of damper 5.
Referring to Fig. 1, o 10 includes lower coil, guide post, position sensor, coil and position sensor ginseng
According to point, when o 10 obtains electric, you can realize the adjustable spring function of rigidity.
Referring to Fig. 1, the fixing end of damper 5 and the output end of o 10 respectively connected start and stop mechanism
The two ends of linking arm 46, the mobile terminal of damper 5 and the input of o 10 respectively connected another start and stop mechanism
Linking arm 46 two ends, make damper 5 and o 10 be in parallel connection.When using, a pair of pistons of start and stop mechanism
The installation end of bar 41 respectively connected the linking arm 12 of the left steering section 3 of steering axle of automobile and the linking arm of right turn section 7.
Referring to Fig. 1, steering axle of automobile includes driving axle housing 6, constant velocity cardan joint 2, outer semiaxis 1, inner shaft 9, left steering wheel
13 and right turn wheel 8.
Operation principle of the invention is described as follows：
When there is multiple limits ring self-excitation in automobile, damper 5, o 10 and a pair of start and stop mechanisms
Two magnetic valves 11 obtain electric simultaneously, and lateral stiffness is adjusted by o 10, and horizontal damping is adjusted by damper 5,
It is shimmy to suppress deflecting roller multiple limits ring；If shimmy be suppressed, vibration absorber power-off is stopped.
On o 10, during work, reaching the standard grade on o 10 is determined by supplying sense of current
Attraction or repulsive force between circle lower coil, thus electric current size and Orientation be by speed, position, two solenoids it
Between distance function determine.
On damper 5, by the size of current for changing supply electromagnet 532, thus it is possible to vary 532 pairs of the first teeth of electromagnet
The attraction size of bar 534, the first tooth bar 534 is close in the presence of attraction to electromagnet 532, and the first tooth bar 534 passes through
The gear teeth of its right-hand member are meshed with central gear 537, and central gear 537 drives synchronous turn of the second tooth bar 535, the 3rd tooth bar 536
Dynamic, the real work area of such opening 533 will diminish, and the damped coefficient C of damping piston 53 will become big.When need by
Damped coefficient becomes hour, reduces the size of current of supply electromagnet 532, and central gear 537 is acted in the restoring moment of wind spring 538
Under rotate clockwise, the first tooth bar 534, the second tooth bar 535, the 3rd tooth bar 536 under the drive of centre wheel 537 opposite direction turn
Dynamic, the real work area of such opening 533 will become big, and the damped coefficient C of damping piston 53 will diminish.It is thus real
Show shock absorber damping C from small to large, then consecutive variations from big to small.
Claims (7)
1. it is a kind of suppress automobile steering roller multiple limits ring self-excitation vibration absorber, it is characterised in that：Including a pair of start and stops
Structure, damper and o；
Every start and stop mechanism includes start and stop oil cylinder, piston and the piston rod of closing, and piston is located in start and stop oil cylinder, outside piston rod
Stretch, overhanging piston rod is installation end；The cylinder body of the start and stop oil cylinder it is in parallel magnetic valve；One end of start and stop oil cylinder is provided with connection
Arm；
The damper is variable cross-section damper, realizes changing damping force by electromagnetic action；
The o obtains electric, realizes the adjustable spring function of rigidity；
The fixing end of the damper and the output end of o respectively connected one the two of the linking arm of start and stop mechanism
End, the mobile terminal of damper and the input of o respectively connected the two ends of the linking arm of another start and stop mechanism,
Damper and o is set to be in parallel connection；
When using, the installation end of a pair of piston rods of start and stop mechanism respectively connected the left steering section and right turn of steering axle of automobile
Section；
When there is multiple limits ring self-excitation in automobile, damper, o and a pair of the two of start and stop mechanism electricity
Magnet valve obtains electric simultaneously, turns to vibration absorber and starts working.
2. it is according to claim 1 it is a kind of suppress automobile steering roller multiple limits ring self-excitation vibration absorber, its feature
It is：The start and stop oil cylinder is closed piston oil-cylinder, and axial one end of cylinder body is connected to linking arm；Linking arm is lath-shaped,
Two ends are overhanging along the radial direction of cylinder body；The overhanging end of piston rod is located at the outside of the axial other end of cylinder body.
3. it is according to claim 1 it is a kind of suppress automobile steering roller multiple limits ring self-excitation vibration absorber, its feature
It is：The magnetic valve is 2/2-way normally open type magnetic valve；Offered respectively on the cylinder body of the start and stop oil cylinder fuel feed hole and
Oil outlet, magnetic valve is connected in parallel between fuel feed hole and oil outlet；When magnetic valve power-off damper does not work, magnetic valve is normal
Open, the oil communication between fuel feed hole and oil outlet on start and stop oil cylinder；When magnetic valve must be electrically turn off, the oil-feed on start and stop oil cylinder
Oil circuit between hole and oil outlet is blocked, and piston rod is fixed with piston position, and start and stop mechanism is turned to by access steering
Shock absorber is started working；After shimmy disappearance, shock absorber start and stop mechanism power-off, magnetic valve power-off open, damper with turn
Disconnected to the connection of system.
4. it is according to claim 1 it is a kind of suppress automobile steering roller multiple limits ring self-excitation vibration absorber, its feature
It is：The damper includes cylinder barrel, sliding plunger, damping piston mechanism and damping piston-rod, and damping piston mechanism is connected to
One end of damping piston-rod, the other end of damping piston-rod is extended outside cylinder barrel；Sliding plunger is located in the rodless cavity of cylinder barrel；
The damping piston mechanism includes damping piston, and the middle part of damping piston is connected to damping piston-rod by rod aperture
One end, central gear is connected with the one end for the damping piston-rod being connected with damping piston, is engaged with central gear and is provided with three
Tooth bar；
The first tooth bar is main carry-over bar in three tooth bars, and the tooth bar end material of first tooth bar is magnetic material；Second
Tooth bar and the 3rd tooth bar are driven tooth bar, and damping piston corresponding with the first tooth bar is provided with electromagnet；First tooth bar, the second tooth
Article and the 3rd racks turn on the damping piston；On the first tooth bar, the second tooth bar and the corresponding damping piston of the 3rd tooth bar
Three openings are offered respectively；Electromagnet obtain it is electric pass through the first rack drives central gear rotation, then drive the second tooth bar and
3rd rack synchronous are rotated, and change three real work areas of opening, realize the continuous change of the damping force of damper.
5. it is according to claim 4 it is a kind of suppress automobile steering roller multiple limits ring self-excitation vibration absorber, its feature
It is：The periphery of the rod aperture of the damping piston one side is provided with isosceles triangle groove, three corresponding with isosceles triangle groove
Locating piece is respectively equipped with tooth bar, the locating piece on three tooth bars corresponds to be located in isosceles triangle groove respectively, realized to three teeth
The restriction of bar slewing area.
6. it is according to claim 5 it is a kind of suppress automobile steering roller multiple limits ring self-excitation vibration absorber, its feature
It is：The locating piece is L-shaped block, wherein a upright side is connected to corresponding tooth bar.
7. it is according to claim 4 it is a kind of suppress automobile steering roller multiple limits ring self-excitation vibration absorber, its feature
It is：First tooth bar, the second tooth bar and the 3rd tooth bar are structure identical fan blades shape, and one end is tooth bar, and the other end is work
Dynamic connection end, is flexibly connected end and is flexibly connected damping piston.
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| CN112115556A (en) * | 2020-09-28 | 2020-12-22 | 重庆长安汽车股份有限公司 | In-vehicle vibration simulation analysis method based on finished vehicle start-stop working condition and storage medium |
| CN118529123A (en) * | 2024-07-26 | 2024-08-23 | 比亚迪股份有限公司 | Steering drive system, method, steering system, controller, medium and vehicle |
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|---|---|
| CN106926899B (en) | 2018-09-07 |
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