CN109515065A - It is a kind of can automatic ration adjust automotive wheel away from adjustment system and method for adjustment - Google Patents
It is a kind of can automatic ration adjust automotive wheel away from adjustment system and method for adjustment Download PDFInfo
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- CN109515065A CN109515065A CN201811180888.6A CN201811180888A CN109515065A CN 109515065 A CN109515065 A CN 109515065A CN 201811180888 A CN201811180888 A CN 201811180888A CN 109515065 A CN109515065 A CN 109515065A
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- wheel
- stepper motor
- gear
- control unit
- electronic control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/02—Dead axles, i.e. not transmitting torque
- B60B35/10—Dead axles, i.e. not transmitting torque adjustable for varying track
- B60B35/1072—Dead axles, i.e. not transmitting torque adjustable for varying track by transversally movable elements
- B60B35/109—Dead axles, i.e. not transmitting torque adjustable for varying track by transversally movable elements the element is an axle part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/02—Dead axles, i.e. not transmitting torque
- B60B35/10—Dead axles, i.e. not transmitting torque adjustable for varying track
- B60B35/1036—Dead axles, i.e. not transmitting torque adjustable for varying track operated with power assistance
- B60B35/1045—Dead axles, i.e. not transmitting torque adjustable for varying track operated with power assistance electrically
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention relates to it is a kind of can automatic ration adjust automotive wheel away from adjustment system and method for adjustment, which includes semiaxis with scalable spline pair, the ultrasonic detector being mounted on vehicle front vehicle frame and velocity sensor, the display screen that is mounted on automotive interior, the electronic control unit being electrically connected with display screen, four stepper motors, the harmonic gear reducer, rack pinion pair, tourelle, returning device being connected with electronic control unit；After the power of automobile engine is transferred to drive axle differential mechanism, wheel is transferred to by two flexible spline semiaxis.The regulating device can carry out precisely quantitative adjusting to wheel tracks according to the distance at the real-time speed of automobile and curve ahead or barrier, and algorithms of different can be arranged in ECU as needed, to change the control mode of wheel tracks variation.
Description
Technical field
The invention belongs to field of intelligent control, are related to automobile wheel track adjustment device, and in particular to one kind can automatic ration tune
Save automotive wheel away from adjustment system and method for adjustment.
Background technique
Currently, the wheel tracks of existing automobile are fixed and invariable, can not change according to requirements in use
Become and is changed.However, the different of wheelspan can directly have an impact driving performance, and if vehicle front wheelspan is wider, automobile
Can be more stable in turning, lateral stability is better；But front tread is wider, and turning to accuracy can be lower, occupies width of roadway
It is bigger.In addition, wheelspan size also will affect automobile in the passability and driving safety of narrow road surface.
206826318 U of Chinese patent CN disclose " a kind of adjustable offset away from wheel and adjustable tread automobile ", solve
The technical issues of wheelspan can not adjust, but the automotive wheel wheelspan is not capable of automatic changing, need to replace wheel rim and spoke manually
Mounting surface；Therefore, it is either all more troublesome during installation or adjusting, and wheel-track-variable has stagewise
Feature, i.e. wheel tracks can only be fixed several values, and applicable surface is narrow.
102381135 A of Chinese patent CN is disclosed a kind of " wheel-track-variable automobile ", which uses hydraulic device pair
Wheel tracks are changed, but since hydraulic transmission realizes that fixed ratio transmission is difficult, and this kind of driving structure and control system letter
It is single, therefore Wheel centre distance variable quantity cannot accurately be controlled.In addition, hydraulic transmission can not in relative motion surface meeting
The leakage of the appearance hydraulic oil avoided, the viscosity of oil liquid can also change with the variation of temperature, and the change of viscosity not only can shadow
The mobility for ringing fluid, also will affect internal friction size, and the too low inside and outside generation that can make hydraulic device of viscosity leaks,
Unnecessary loss is caused, so this kind of structure is not preferably to select.
203818926 U of Chinese patent CN is disclosed " a kind of electric car rear tread regulating device ", which will
Transmission shaft on motor is connect with gear assembly, and the both ends of gear assembly are respectively equipped with worm and wheel, worm gear with
Carriage connection, carriage sliding to realize to automobile back wheel away from adjusting, but the regulating device only can be to automobile
Rear tread is adjusted, and does not provide effective control method to the adjusting of wheel tracks, cannot achieve accurate control；Separately
Outside, worm gearing low efficiency, it is at high cost, it is only applicable to the low power occasion of transmission power, the scope of application is small；Again
Person, since the sliding rail lower end surface of the regulating device is connected with body mounting system, it is dry that wheelspan changes the generation of Shi Yiyu suspension system
It relates to, if the working condition for changing suspension system easily influences stability, safety and the comfort of automobile, it can be seen that, this kind knot
The regulating device of structure is simultaneously unreasonable, can also there is above-mentioned problems in use.
Summary of the invention
The first purpose of this invention be to provide it is a kind of can automatic ration adjust automotive wheel away from adjustment system, with solution
Certainly existing wheel tracks adjustment operating process is cumbersome, time-consuming and laborious, and the technical problem of wheelspan can not be accurately adjusted according to road conditions.
To achieve the above object, the present invention is achieved by the following technical scheme:
It is a kind of can automatic ration adjust automotive wheel away from adjustment system, comprising: semiaxis with scalable spline pair, peace
Ultrasonic detector and velocity sensor on vehicle front vehicle frame, the display screen and display screen for being mounted on automotive interior
The electronic control unit of electrical connection, four stepper motors, harmonic gear reducer, rack-and-pinion being connected with electronic control unit
Transmission, tourelle, returning device；The semiaxis is connect using tourelle with wheel, for changing between two wheels
Distance；
The ultrasonic detector for probe vehicle to front obstacle or the distance d at turning, and sends it to electricity
Sub-control unit；
The velocity sensor reaches electronic control unit for the speed v of real-time monitoring automobile, and by speed v；
The display screen it is expected the front-wheel changed, rear track variation delta L1, Δ L2 for inputting driver respectively,
And data are passed to electronic control unit；Meanwhile driver can directly input it the wheelspan change during by display screen
Desired distance d；
The electronic control unit includes presetting module and computing module, and the default mould is fast, for storing the peace of setting
Full-time t'；The computing module, the distance d of distance d or display screen input for ultrasonic detector to be passed to, speed pass
The incoming speed v of sensor, front-wheel, the rear track variation delta L1, Δ L2 of display screen input, and the safety time t' of setting
It is calculated, four stepper motors is controlled according to the situation after calculating；Electronic control unit controls stepper motor movement
When, at the same control driving the near front wheel, off-front wheel stepper motor or control simultaneously driving left rear wheel, off hind wheel stepper motor,
Reach expected wheelspan change amount；
Four stepper motors are respectively positioned near on the vehicle frame of wheel, and the output end of four stepper motors is all made of
Shaft coupling is connected with harmonic gear reducer, and stepper motor carries out power output according to the signal that electronic control unit transmits；Four
A stepper motor step angle is B, is subdivided into X；
The harmonic gear reducer, is used for reduction of speed torque increase, and transmission ratio isZ in formula2、z1Respectively
Firm gear, the number of teeth of flexbile gear, symbol only represents direction in formula, this formula be firm gear fix, wave producer actively, flexbile gear it is driven when it is humorous
Wave gear reduction unit transmission ratio；The output end of harmonic gear reducer is connect with the gear that modulus is m, the number of teeth is z；
The rack pinion pair includes gear, rack gear, and T-type slideway is machined on the vehicle frame, the rack gear
Bottom be with the matched T-type structure of T-type slideway, rack-driving is mounted in the T-type slideway of vehicle frame, can be into T-type slideway
Any sliding of row；Rack and pinion engagement is slided by gear driving rack along T-type slideway；Pacify in the end of the rack gear
Equipped with tourelle；Rolling element on the tourelle is arranged on raceway；
The raceway is fixed on the inside of hub for vehicle wheel by raceway fixed frame, and when vehicle wheel rotation, rolling element is in raceway
Ceaselessly roll.
As a preference of the present invention, the semiaxis includes inner shaft, the outer semiaxis that is connect by universal joint with inner shaft；Institute
Outer semiaxis is stated using flexible spline transmission shaft, spline sections are placed in inside by outer semiaxis, and axis where internal spline is placed in outside,
And installation returning device is tilted in female splined shaft outer surface；Described returning device one end is connect with female splined shaft outer surface, another
End is fixed on vehicle frame or universal bearing.
As a preference of the present invention, the stepper motor and harmonic gear reducer are placed in motor casing, gear is mounted on
The outside of motor casing, motor casing are mounted on vehicle frame using fixing bolt.
Second object of the present invention be to provide it is a kind of can automatic ration adjust automotive wheel away from method of adjustment, with solution
The technical problem of wheelspan can not be accurately adjusted when certainly existing wheel tracks adjust according to road conditions.
To achieve the above object, the present invention is achieved by the following technical scheme:
It is a kind of can automatic ration adjust automotive wheel away from adjustment method, specifically includes the following steps:
Step S1, automobile is during traveling, is mounted on ultrasonic detector detection automobile on automobile frame to front
Barrier or the distance d at turning, and send it to electronic control unit；At the same time, velocity sensor real-time monitoring speed
V, and the speed v of monitoring is reached into electronic control unit, when driver needs to change wheel tracks to adapt to driving environment, drive
The person of sailing inputs front and rear wheel wheel tracks variation delta L1, Δ L2 by the display screen of automotive interior；
Step S2, the distance d that electronic control unit is passed to according to ultrasonic detector, the incoming speed v of velocity sensor,
Preset safety time t' is calculated in wheelspan change amount Δ L1, the Δ L2 and default mould of display screen input are fast, root
Control driving the near front wheel, the stepper motor of off-front wheel or the step for controlling driving left rear wheel, off hind wheel simultaneously simultaneously according to calculated case
Into motor；
The ECU is calculated by the following formula stepper motor in (t-t') required pulse number in the time:
In formula, Δ L is front-wheel or rear-wheel wheel for inputting away from changing value, z2、z1Firm gear respectively in harmonic gear reducer,
The number of teeth of flexbile gear, m are module, and z is the number of teeth of gear, and B is stepper motor step angle, X is Design of Stepper Motor Subdivision；
It is acquired according to following formula according to fixed frequency pulse:
In formula, Δ L is front-wheel or rear-wheel wheel for inputting away from variable quantity, and B is stepper motor step angle, X is that stepper motor is thin
Point, m is module, z is number of gear teeth, and t is wheelspan change time (t=d/v)；
Using the method for even acceleration, even deceleration if using stepper motor conversion system, the acceleration that pulse frequency changes
Are as follows:
Step S3, control signal is passed to stepper motor after electronic control unit handles signal, stepper motor
Power is exported by shaft coupling and harmonic gear reducer to gear, then is converted into via rack pinion adjutant's rotary motion
Linear motion, wheel is passed to by tourelle, the flexible spline semiaxis being connect with wheel while transmitting power with
The change of wheel tracks and change, complete adjusting to wheelspan change amount.
The present invention can also be directly inputted the desired automobile of driver by interior display screen to front obstacle or be turned
The distance d of crook and driver it is expected the front-wheel changed, rear track variation delta L1, Δ L2, electronic control unit according to
The distance d of display screen input, front-wheel, rear track variation delta L1, Δ L2, the incoming speed v of velocity sensor, and setting
Safety time t' calculated, stepper motor is controlled according to calculated case；The electricity when driver inputs desired distance
Sub-control unit is calculated according to the distance that driver inputs, and when driver does not input desired distance, then uses ultrasonic wave
The distance of detector detection is calculated.
The above technical solution of the present invention has the following advantages over the prior art:
(1) present invention in wheel tracks regulating device can be according to the real-time speed of automobile and curve ahead or barrier at
Distance carries out precisely quantitative adjusting to wheel tracks, and algorithms of different can be arranged in ECU as needed, becomes to change wheel tracks
The control mode of change.
(2), install compact simple for changing the mechanical driving device structure of wheel tracks in the present invention, convenient for control, phase
It is safer for modes such as hydraulic, Worm and Worm Gear Drivings, reliable.
(3) the front and rear wheel wheelspan in the present invention can change simultaneously different magnitudes, therefore be applicable in road during use
Face is more extensive, possesses automobile and preferably drives sense.
(4) it uses harmonic gear reducer to reduction of speed torque increase in the present invention, keeps stepper motor work more safe and reliable,
Rack pinion is selected in Linear transmission mode, it can be to avoid the reverse efficiency because caused by using other linear transmissions
Greatly, the disadvantages such as intensity is low.
(5) the special arrangement of mechanical driving device can effectively avoid itself and suspension system and steering mechanism in the present invention
It interferes, keeps stability, safety and the comfort of automobile more preferable.
Detailed description of the invention
Fig. 1 is the mounting structure schematic diagram of adjustment system of the present invention.
Fig. 2 is the attachment structure schematic diagram of stepper motor of the present invention Yu rack pinion pair.
Fig. 3 is the mounting structure schematic diagram of the flexible spline semiaxis of the present invention.
Fig. 4 is the structural schematic diagram of wheel of the present invention.
Fig. 5 is the schematic diagram that rack pinion pair of the present invention is mounted on vehicle frame.
Fig. 6 is electronic control unit EUC control principle drawing of the present invention.
Specific embodiment
To make it will be apparent to those skilled in that technical solution of the present invention and its advantage and effect are understood, below with reference to attached
The present invention is described in more detail for figure, but is not used to limitation of the invention.
Embodiment 1
One kind provided by the invention can automatic ration adjust automotive wheel away from adjustment system can be directly mounted at existing vapour
Che Shang, the automobile can drive automobile for front engine front wheel, which uses straight frame；
Refering to fig. 1 to Fig. 6, can automatic ration adjust automotive wheel away from adjustment system include: to be mounted on drive axle differential
The semiaxis 1 for having flexible spline pair, the ultrasonic detector 3 and velocity sensor that are mounted on vehicle front vehicle frame 2 on device
4, be mounted on the display screen 5 of automotive interior, the electronic control unit (EUC) 6 that is electrically connected with display screen, with electronic control unit phase
Even four stepper motors 7, harmonic gear reducer 8, the gear 12 of rack pinion pair, rack pinion pair rack gear
9, tourelle 13, return spring 10；After the power of engine is transferred to drive axle differential mechanism on automobile, passed by two semiaxis 1
It is handed to wheel 11, the semiaxis 1 with flexible spline pair is for changing the distance between two wheels；
The ultrasonic detector 3 for probe vehicle to front obstacle or the distance d at turning, and is sent it to
Electronic control unit 6；
The velocity sensor 4 reaches electronic control unit 6 for the speed v of real-time monitoring automobile, and by speed v；
The display screen 5 it is expected the front-wheel changed, rear track variation delta L1, Δ L2 for inputting driver respectively,
And data are passed to electronic control unit 6；Meanwhile driver can directly input it the wheelspan change during by display screen
Desired distance d；
The electronic control unit 6 includes presetting module and computing module, and the default mould is fast, for storing the peace of setting
Full-time t'；The computing module, the distance d of distance d or display screen input for ultrasonic detector to be passed to, speed pass
The incoming speed v of sensor, front-wheel, the rear track variation delta L1, Δ L2 of display screen input, and the safety time t' of setting
It is calculated, four stepper motors 7 is controlled according to the situation after calculating；It is dynamic that electronic control unit 6 controls stepper motor 7
When making, at the same control driving the near front wheel, off-front wheel stepper motor or control simultaneously driving left rear wheel, off hind wheel stepping electricity
Machine reaches expected wheelspan change amount (see Fig. 6)；
Four stepper motors 7 are respectively positioned near on the vehicle frame of wheel, the stepping electricity being mounted near the near front wheel
Machine drives the near front wheel, the stepper motor driving off-front wheel being mounted near off-front wheel；The stepper motor being mounted near left rear wheel
Left rear wheel is driven, the stepper motor driving off hind wheel being mounted near off hind wheel；The output end of four stepper motors 7 is all made of connection
Axis device 17 is connected with harmonic gear reducer, and stepper motor carries out power output according to the signal that electronic control unit transmits；Four
A stepper motor step angle is B, is subdivided into X；
The harmonic gear reducer 8, is used for reduction of speed torque increase, and transmission ratio isZ in formula2、z1Respectively
Firm gear, the number of teeth of flexbile gear, symbol only represents direction in formula, this formula be firm gear fix, wave producer actively, flexbile gear it is driven when it is humorous
Wave gear reduction unit transmission ratio；The output end of harmonic gear reducer 8 is connect with the gear 12 that modulus is m, the number of teeth is z, stepping
Motor 7 and harmonic gear reducer 8 are placed in motor casing, and gear 12 is mounted on the outside of motor casing 13, and motor casing 13 is using solid
Determine bolt 18 to be mounted on vehicle frame 2；
It is machined with T-type slideway 21 on the vehicle frame 2, the bottom of the rack gear 9 in the rack pinion pair is and T-type
The matched T-type structure of slideway, rack gear 9 are mounted in the T-type slideway of vehicle frame, and any sliding is able to carry out in T-type slideway, are used
T-type slideway structure directly can play the role of limit and holding using T-type slideway, avoid installing other accessories (see
Fig. 5)；Rack gear 9 and gear 12 are ratcheting, are slided by 12 drive rack 9 of gear along T-type slideway；It is (close in the end of rack gear 9
One end of wheel) tourelle 13 is installed；Rolling element 131 on the tourelle is arranged on raceway 14, the raceway
14 are fixed on the inside of hub for vehicle wheel by raceway fixed frame 15, and when wheel 11 rotates, rolling element 131 ceaselessly rolls in raceway
It is dynamic, so that rack gear and wheel is can produce relative rolling, and play the role of holding to spacing (see Fig. 2, Fig. 4).
After the power of inventive engine is transferred to drive axle differential mechanism, wheel is transferred to via left and right two semiaxis 1
11；The outer semiaxis 1b that the semiaxis includes the inner shaft 1a connecting with drive axle differential mechanism, is connect by universal joint with inner shaft；
Spline sections are placed in inside using flexible spline transmission shaft, outer semiaxis by the outer semiaxis 1b, and axis where internal spline is placed in
Outside, and need to tilt installation return spring 10 in female splined shaft outer surface, to self-return；Described 10 one end of return spring
With outer half axis connection, the other end is fixed on the spherical bearing 16 being coated on outside universal joint；After having adjusted wheelspan, in return
Under the action of spring, wheel can self-return (see Fig. 3).
The present invention also provides it is a kind of using it is above-mentioned can automatic ration adjust automotive wheel away from adjustment system to wheelspan carry out
The method of regulation, specifically includes the following steps:
Step S1, automobile is during traveling, is mounted on ultrasonic detector detection automobile on automobile frame to front
Barrier or the distance d at turning, and send it to electronic control unit；At the same time, velocity sensor real-time monitoring speed
V, and the speed v of monitoring is reached into electronic control unit, when driver needs to change wheel tracks to adapt to driving environment, drive
The person of sailing inputs front and rear wheel wheel tracks variation delta L1, Δ L2 by the display screen of automotive interior；
Step S2, the distance d that electronic control unit is passed to according to ultrasonic detector, the incoming speed v of velocity sensor,
The value energy of preset safety time t'(setting in wheelspan change amount Δ L1, the Δ L2 and default mould of display screen input are fast
Enough mitigate psychological pressure for driver) it calculates, control the step of driving the near front wheel, off-front wheel simultaneously according to calculated case
Control into motor or simultaneously the stepper motor for driving left rear wheel, off hind wheel；
The ECU is calculated by the following formula stepper motor in (t-t') required pulse number in the time:
In formula, Δ L is front-wheel or rear-wheel wheel for inputting away from changing value, z2、z1Firm gear respectively in harmonic gear reducer,
The number of teeth of flexbile gear, m are module, and z is number of gear teeth, and B is stepper motor step angle, X is Design of Stepper Motor Subdivision；
Since stepper motor has the advantages that torque is big, inertia is small, response frequency is high, there is moment starting and rapidly stop
Advantageous characteristic, therefore can the different frequency conversion effect of motor determines according to actual conditions；
It is acquired according to following formula according to fixed frequency pulse:
In formula, Δ L is front-wheel or rear-wheel wheel for inputting away from variable quantity, and B is stepper motor step angle, X is that stepper motor is thin
Point, m is module, z is number of gear teeth, and t is wheelspan change time (t=d/v)；
Using the method for even acceleration, even deceleration if using stepper motor conversion system, the acceleration that pulse frequency changes
Are as follows:
Step S3, control signal is passed to stepper motor after electronic control unit handles signal, stepper motor
Power is exported by shaft coupling and harmonic gear reducer to gear, then is converted into via rack pinion adjutant's rotary motion
Linear motion, wheel is passed to by tourelle, the flexible spline semiaxis being connect with wheel while transmitting power with
The change of wheel tracks and change, complete adjusting to wheelspan change amount.
In addition, the present invention can also directly input the desired automobile of driver to preceding object by interior display screen 5
The distance d and driver at object or turning it is expected front-wheel, the rear track variation delta L1, Δ L2 changed, and electronic control is single
The distance d that member is inputted according to display screen 5, front-wheel, rear track variation delta L1, Δ L2, the incoming speed v of velocity sensor,
And the safety time t' of setting is calculated, and is controlled according to calculated case stepper motor；It is expected when driver inputs
Apart from when electronic control unit calculated according to the distance that driver inputs, when driver does not input desired distance, then adopt
It is calculated with the distance of ultrasonic detector detection.
Claims (5)
1. one kind can automatic ration adjust automotive wheel away from adjustment system, which is characterized in that half with scalable spline pair
Axis, the ultrasonic detector being mounted on vehicle front vehicle frame and velocity sensor, the display screen for being mounted on automotive interior, with it is aobvious
The electronic control unit of display screen electrical connection, four stepper motors, harmonic gear reducer, gears being connected with electronic control unit
Rack-driving pair, tourelle, returning device；The semiaxis is connect using tourelle with wheel, for changing two wheels
The distance between；
The ultrasonic detector for probe vehicle to front obstacle or the distance d at turning, and sends it to electronics control
Unit processed；
The velocity sensor reaches electronic control unit for the speed v of real-time monitoring automobile, and by speed v；
The display screen it is expected the front-wheel changed, rear track variation delta L1, Δ L2 for inputting driver respectively, and will
Data are passed to electronic control unit；Meanwhile driver can directly input its expection during wheelspan change by display screen
Distance d；
The electronic control unit includes presetting module and computing module, and the default mould is fast, for store setting it is safe when
Between t '；The computing module, the distance d of distance d or display screen input for ultrasonic detector to be passed to, velocity sensor
Incoming speed v, front-wheel, the rear track variation delta L1, Δ L2 of display screen input, and the safety time t ' progress of setting
It calculates, four stepper motors is controlled according to the situation after calculating；When electronic control unit controls stepper motor movement, together
When control driving the near front wheel, off-front wheel stepper motor or control simultaneously driving left rear wheel, off hind wheel stepper motor, reach it
To expected wheelspan change amount；
Four stepper motors are respectively positioned near on the vehicle frame of wheel, and the output end of four stepper motors is all made of shaft coupling
Device is connected with harmonic gear reducer, and stepper motor carries out power output according to the signal that electronic control unit transmits；Four institutes
The stepper motor step angle stated is B, is subdivided into X；
The harmonic gear reducer, is used for reduction of speed torque increase, and transmission ratio isZ in formula2、z1Respectively firm gear,
The number of teeth of flexbile gear, symbol only represents direction in formula, this formula be firm gear fix, wave producer actively, flexbile gear it is driven when harmonic wave tooth
Wheel decelerator transmission ratio；The output end of harmonic gear reducer is connect with the gear that modulus is m, the number of teeth is z；
The rack pinion pair includes gear, rack gear, and T-type slideway, the bottom of the rack gear are machined on the vehicle frame
For with the matched T-type structure of T-type slideway, rack gear is mounted in the T-type slideway of vehicle frame, and any cunning is able to carry out in T-type slideway
It is dynamic；Rack and pinion engagement is slided by gear driving rack along T-type slideway；Rolling is installed in the end of the rack gear
Device；Rolling element on the tourelle is arranged on raceway；
The raceway is fixed on the inside of hub for vehicle wheel by raceway fixed frame, and when vehicle wheel rotation, rolling element does not stop in raceway
Rolling.
2. one kind according to claim 1 can automatic ration adjust automotive wheel away from adjustment system, which is characterized in that institute
State the outer semiaxis that semiaxis includes inner shaft, connect by universal joint with inner shaft；The outer semiaxis is using flexible spline transmission
Spline sections are placed in inside by axis, outer semiaxis, and axis where internal spline is placed in outside, and tilts and install in female splined shaft outer surface
Returning device；Described returning device one end is connect with female splined shaft outer surface, and the other end is fixed on vehicle frame or universal bearing.
3. one kind according to claim 1 can automatic ration adjust automotive wheel away from adjustment system, which is characterized in that institute
It states stepper motor and harmonic gear reducer is placed in motor casing, gear is mounted on the outside of motor casing, and motor casing is using fixation
Bolt is mounted on vehicle frame.
4. it is described in claim 1 can automatic ration adjust automotive wheel away from adjustment system method that wheelspan is adjusted,
It is characterized in that, specifically includes the following steps:
Step S1, automobile is during traveling, is mounted on ultrasonic detector detection automobile on automobile frame to preceding object
Object or the distance d at turning, and send it to electronic control unit；At the same time, velocity sensor real-time monitoring speed v, and
The speed v of monitoring is reached into electronic control unit, when driver needs to change wheel tracks to adapt to driving environment, driver
Front and rear wheel wheel tracks variation delta L1, Δ L2 are inputted by the display screen of automotive interior；
Step S2, the distance d that electronic control unit is passed to according to ultrasonic detector, the incoming speed v of velocity sensor, display
Wheelspan change amount Δ L1, the Δ L2 and the fast interior preset safety time t' of default mould for shielding input are calculated, according to meter
Calculate situation simultaneously control driving the near front wheel, off-front wheel stepper motor or control simultaneously driving left rear wheel, off hind wheel stepping electricity
Machine；
The ECU is calculated by the following formula stepper motor in (t-t') required pulse number in the time:
In formula, Δ L is front-wheel or rear-wheel wheel for inputting away from changing value, z2、z1Firm gear, flexbile gear respectively in harmonic gear reducer
The number of teeth, m is module, and z is the number of teeth of gear, and B is stepper motor step angle, X is Design of Stepper Motor Subdivision；
It is acquired according to following formula according to fixed frequency pulse:
Using the method for even acceleration, even deceleration if using stepper motor conversion system, the acceleration that pulse frequency changes are as follows:
Step S3, control signal is passed to stepper motor, the power of stepper motor after electronic control unit handles signal
It exports by shaft coupling and harmonic gear reducer to gear, then is converted into straight line via rack pinion adjutant's rotary motion
Movement, passes to wheel by tourelle, the flexible spline semiaxis connecting with wheel is while transmitting power with vehicle
The change of wheelspan and change, complete adjusting to wheelspan change amount.
5. it is described in claim 1 can automatic ration adjust automotive wheel away from adjustment system method that wheelspan is adjusted,
It is characterized in that, specifically includes the following steps:
Step S1, automobile is during traveling, the velocity sensor real-time monitoring speed v being mounted on automobile frame, and will prison
The speed v of survey reaches electronic control unit, and when driver needs to change wheel tracks to adapt to driving environment, driver passes through
The distance d and driver that the display screen of automotive interior inputs desired automobile to front obstacle or turning it is expected to change
Front-wheel, rear track variation delta L1, Δ L2；
Step S2, the distance d that electronic control unit is inputted according to display screen 5, the incoming speed v of velocity sensor, display screen are defeated
Preset safety time t' is calculated in wheelspan change amount Δ L1, Δ L2 and the default mould entered is fast, according to calculating feelings
Condition simultaneously control driving the near front wheel, off-front wheel stepper motor or control simultaneously driving left rear wheel, off hind wheel stepper motor；
The ECU is calculated by the following formula stepper motor in (t-t') required pulse number in the time:
In formula, Δ L is front-wheel or rear-wheel wheel for inputting away from changing value, z2、z1Firm gear, flexbile gear respectively in harmonic gear reducer
The number of teeth, m is module, and z is the number of teeth of gear, and B is stepper motor step angle, X is Design of Stepper Motor Subdivision；
It is acquired according to following formula according to fixed frequency pulse:
Using the method for even acceleration, even deceleration if using stepper motor conversion system, the acceleration that pulse frequency changes are as follows:
Step S3, control signal is passed to stepper motor, the power of stepper motor after electronic control unit handles signal
It exports by shaft coupling and harmonic gear reducer to gear, then is converted into straight line via rack pinion adjutant's rotary motion
Movement, passes to wheel by tourelle, the flexible spline semiaxis connecting with wheel is while transmitting power with vehicle
The change of wheelspan and change, complete adjusting to wheelspan change amount.
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| CN201811180888.6A CN109515065B (en) | 2018-10-09 | 2018-10-09 | Adjusting system and adjusting method capable of automatically and quantitatively adjusting wheel track of automobile |
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| CN201811180888.6A CN109515065B (en) | 2018-10-09 | 2018-10-09 | Adjusting system and adjusting method capable of automatically and quantitatively adjusting wheel track of automobile |
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| CN109515065A true CN109515065A (en) | 2019-03-26 |
| CN109515065B CN109515065B (en) | 2020-05-12 |
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| CN201811180888.6A Expired - Fee Related CN109515065B (en) | 2018-10-09 | 2018-10-09 | Adjusting system and adjusting method capable of automatically and quantitatively adjusting wheel track of automobile |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6139045A (en) * | 1997-02-25 | 2000-10-31 | Land O' Lakes, Inc. | Wheel assembly having a mechanism to adjust the distance between the wheels |
| WO2005118379A1 (en) * | 2004-05-26 | 2005-12-15 | Bargam S.P.A. | Axle for agricultural machines |
| EP2050423A1 (en) * | 2007-07-16 | 2009-04-22 | Fundacion Tekniker | Wheelchair |
| EP2058154A1 (en) * | 2007-11-09 | 2009-05-13 | Herbert Dammann GmbH | Frame for special vehicles |
| CN101857048A (en) * | 2010-06-02 | 2010-10-13 | 山东五征集团有限公司 | Vehicle drive axle with adjustable wheel track and ground clearance |
| WO2012117276A1 (en) * | 2011-03-03 | 2012-09-07 | C.M.C. S.R.L. - Società Unipersonale | A self-moving operating machine with variable axle width |
| CN204506350U (en) * | 2015-03-17 | 2015-07-29 | 周泓宇 | Lateral wheel is apart from telescopic devices |
| CN205220853U (en) * | 2015-11-27 | 2016-05-11 | 江苏省交通科学研究院有限公司 | Radar four -wheel adjusting device |
| EP3034325A1 (en) * | 2014-12-18 | 2016-06-22 | CNH Industrial Belgium nv | An agricultural harvester axle |
-
2018
- 2018-10-09 CN CN201811180888.6A patent/CN109515065B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6139045A (en) * | 1997-02-25 | 2000-10-31 | Land O' Lakes, Inc. | Wheel assembly having a mechanism to adjust the distance between the wheels |
| WO2005118379A1 (en) * | 2004-05-26 | 2005-12-15 | Bargam S.P.A. | Axle for agricultural machines |
| EP2050423A1 (en) * | 2007-07-16 | 2009-04-22 | Fundacion Tekniker | Wheelchair |
| EP2058154A1 (en) * | 2007-11-09 | 2009-05-13 | Herbert Dammann GmbH | Frame for special vehicles |
| CN101857048A (en) * | 2010-06-02 | 2010-10-13 | 山东五征集团有限公司 | Vehicle drive axle with adjustable wheel track and ground clearance |
| WO2012117276A1 (en) * | 2011-03-03 | 2012-09-07 | C.M.C. S.R.L. - Società Unipersonale | A self-moving operating machine with variable axle width |
| EP3034325A1 (en) * | 2014-12-18 | 2016-06-22 | CNH Industrial Belgium nv | An agricultural harvester axle |
| CN204506350U (en) * | 2015-03-17 | 2015-07-29 | 周泓宇 | Lateral wheel is apart from telescopic devices |
| CN205220853U (en) * | 2015-11-27 | 2016-05-11 | 江苏省交通科学研究院有限公司 | Radar four -wheel adjusting device |
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| CN109515065B (en) | 2020-05-12 |
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