CN109677221A - Across the virtual stub suspension system of core wheel - Google Patents
Across the virtual stub suspension system of core wheel Download PDFInfo
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- CN109677221A CN109677221A CN201910115534.1A CN201910115534A CN109677221A CN 109677221 A CN109677221 A CN 109677221A CN 201910115534 A CN201910115534 A CN 201910115534A CN 109677221 A CN109677221 A CN 109677221A
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- horn
- leaf spring
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- 239000000725 suspension Substances 0.000 title claims abstract description 49
- 241000883966 Astrophytum capricorne Species 0.000 claims abstract description 53
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 5
- 241001494479 Pecora Species 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000011160 research Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000004904 shortening Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 241000153246 Anteros Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/008—Attaching arms to unsprung part of vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
- B60G11/08—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only arranged substantially transverse to the longitudinal axis of the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/12—Steering gears mechanical of rack-and-pinion type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0421—Electric motor acting on or near steering gear
-
- 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
- B62D7/18—Steering knuckles; King pins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/40—Indexing codes relating to the wheels in the suspensions
- B60G2200/44—Indexing codes relating to the wheels in the suspensions steerable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/11—Leaf spring
- B60G2202/114—Leaf spring transversally arranged
Abstract
The invention discloses a kind of virtual stub suspension systems across core wheel.Including the EPS turning machine assembly and transverse leaf spring assembly between a suspension fork mechanism being installed between single wheel set and body frame and two wheel sets for being installed on body frame two sides, suspension fork mechanism includes special-shaped goat's horn, Top Crossbeam, electric pushrod assembly and lower swing arm, special-shaped goat's horn is located above wheel set, special-shaped goat's horn lower end connects wheel set, in the middle part of special-shaped goat's horn and top is respectively through lower swing arm, Top Crossbeam is connected to body frame, the side output end of EPS turning machine assembly is connected in the middle part of special-shaped goat's horn through electric pushrod assembly, one side end of transverse leaf spring assembly is connected to Top Crossbeam.The present invention supports four motorized wheels and four-wheel independent steering, realizes vehicle pivot stud, horizontal shifting and parking function, and when turning realizes extra small turning radius, and steering angle is big, structure and reliable performance, and expansion is strong.
Description
Technical field
The present invention relates to new-energy automobile fields, and in particular to new-energy automobile suspension and steering system, more particularly, to
A kind of virtual stub suspension system across core wheel.
Background technique
Now with the fast development of new-energy automobile, there is the pure electric automobile of many different brands in the country.But it is main
Or engine direct to be taken over and be changed to central motor, complete vehicle structure and the kind of drive do not make any change.It continues to use simultaneously
Traditional hang and steering mechanism, each wheel cannot realize independent steering, and vehicle turn radius is big, turn in narrow zone
It is curved, the operation such as turn around is extremely difficult.
With the development of hub motor technology, there is a kind of new-energy automobile of distributed driving.How to rationally design
Suspension and steering system make hub motor and suspension, steering mechanism's effective integration, increase wheel turning angle, reduce vehicle turning
Radius promotes the flexibility of vehicle manipulation, at being an urgent problem to be solved currently.
Summary of the invention
In order to solve the problems, such as background technique, the technical problem to be solved in the present invention is to propose one kind to pass through
The virtual stub suspension system of core wheel can realize vehicle spot turn, horizontal shifting function using the vehicle of the suspension system, turn
Extra small turning radius is realized when curved.
The present invention supports four motorized wheels and four-wheel independent steering, these functions that can operate by whole-control system,
Vehicle realizes above-mentioned specific function automatically.
In order to realize that above-mentioned vehicle intelligence control system, the core technology scheme that the present invention uses are specific as follows:
The present invention includes a suspension fork mechanism being installed between single wheel set and body frame and is installed on vehicle
EPS turning machine assembly and transverse leaf spring assembly between two wheel sets of body skeleton two sides, suspension fork mechanism include special-shaped sheep
Angle, Top Crossbeam, electric pushrod assembly and lower swing arm, special-shaped goat's horn are located above wheel set, and special-shaped goat's horn lower end connects wheel
Assembly, special-shaped goat's horn middle part and top are connected to body frame through lower swing arm, Top Crossbeam respectively, push away in the middle part of special-shaped goat's horn through electronic
Bar assembly is connected to the side output end of EPS turning machine assembly, and a side end of transverse leaf spring assembly is connected to Top Crossbeam.
The Top Crossbeam is mainly assembled by straight pin bulb, swing arm main body, two upper arm bush, and swing arm main body is in
Herringbone, the lambdoid set end of swing arm main body are connected through straight pin bulb with special-shaped goat's horn upper end flexural pivot, swing arm main body herringbone
Two divergent ends of shape are hinged through rotation uniaxial at the top of upper arm bush and body frame；The lower swing arm is mainly by fish-eye type ball
Head, welded pipe main body and two bush for lower arm assemble, and welded pipe main body is in herringbone, the lambdoid set of welded pipe main body
End is connected through flexural pivot in the middle part of fish-eye type bulb and special-shaped goat's horn, lambdoid two divergent ends of welded pipe main body through bush for lower arm with
Uniaxial rotation is hinged in the middle part of body frame；The straight pin bulb of the Top Crossbeam be located at the fish-eye type bulb of lower swing arm just on
The line of centres of side, straight pin bulb and fish-eye type bulb passes through the core wheel of wheel set as virtual stub, virtual stub；This
In invention, virtual stub passes through the structure of wheel set core wheel, compared to not passing through for the existing suspension frame structure such as mcpherson type suspension
Core structure is taken turns, symmetrical configuration is stablized, can preferably supporting & stablizing.
The electric pushrod assembly is mainly by electric pushrod main body, displacement sensor, screw thread swivel sleeve, conical surface pin ball
Head assembles, and displacement sensor is fixedly attached to electric pushrod main body, displacement sensor by displacement transducer mounting bracket
Probe rod and electric pushrod main body push rod parallel arrangement, and between by displacement sensor driving arm it is affixed, it is electronic to push away
The push rod end of bar main body is affixed with one end of screw thread swivel sleeve after stretching out, and the other end of screw thread swivel sleeve installs conical surface pin ball
Head, conical surface pin bulb flexural pivot is in the L-type support that special-shaped goat's horn side is equipped with；Electric pushrod main body through screw thread conversion support and
Wherein one end of EPS turning machine assembly both ends output end is affixed；
The transverse leaf spring assembly is mainly assembled by steel plate leaf spring, shackle bracket, the on both sides of the middle of steel plate leaf spring
It is fixed on body frame through the fixed support level of two leaf spring vehicle bodies, the end of steel plate leaf spring is leaf spring ends mounting bracket,
Swing arm main body of the leaf spring ends mounting bracket through shackle bracket and Top Crossbeam is hinged.
Top Crossbeam is supported by transverse leaf spring assembly, and then carries wheel set and jolts bounce.
Described shackle bracket one end and leaf spring ends mounting bracket is hinged, and the shackle bracket other end is hinged to swing arm main body
Lambdoid middle part.
The EPS turning machine assembly is mainly assembled by pinion-and-rack steering engine, universal joint, EPS driving motor,
EPS driving motor is fixed on body frame, input terminal of the EPS driving motor output shaft through universal joint and pinion-and-rack steering engine
Connection, pinion-and-rack steering engine output end.
The special-shaped goat's horn is formed by multiple Split type supporting stand assembly and connections, and Z-shaped three sections, the lower end of upper section are divided into
Connected between the upper end of lower section by horizontal segment, upper section and lower section it is vertical and and horizontal segment it is vertical, it is total that lower section is located at wheel
At interior side and wheel set is connected, upper section is located above wheel set after horizontal segment is bent.
The wheel set is mainly assembled by tire, wheel rim and hub motor, installs tire outside wheel rim, in wheel rim
Centre installation hub motor, the stationary part of hub motor are connected to the bottom end of special-shaped goat's horn.
The transverse leaf spring assembly replaces with column damper, column damper be connected to body frame and Top Crossbeam it
Between.
The suspension system is used for automobile chassis, can be realized four-wheel independent steering.
Automobile chassis under suspension system of the present invention is realized has there are two types of course changing control approach, and one kind passing through EPS turning machine
Assembly carries out course changing control, and another kind carries out course changing control by electric pushrod main body, and both front and back control independently carries out,
It is directed to vehicle driving state and halted state respectively, does not exist simultaneously.When i.e. EPS turning machine assembly works, electric pushrod main body
Fixing lock stubbornly refuses work；When electric pushrod body of work, EPS turning machine assembly fixing lock stubbornly refuses work.
Under vehicle driving state, two wheel sets of body frame front/rear portion two sides are commonly through an EPS
Turning machine assembly synchronizes course changing control, can be realized the steering of running car.
In the case where automobile stops non-driving state, each wheel set carries out steering control by respective electric pushrod main body
System can be realized the pivot stud and commutation translation traveling of automobile.
The suspension system of special designing is installed on automobile through the invention, be can be realized automobile in-place steering, is conveniently stopped
Vehicle storage, the mode of significantly convenient parking can help to the utilization rate for improving parking space.
Using under suspension system of the present invention, driver also uses the control mode of conventional vehicles to drive vehicle, holding side
To disk, pedal brake pedal and gas pedal.Wherein intelligence control system and manual control system are integrated form schemes, can basis
Operator demand is actively carried out the free switching of two kinds of systems by driver, realizes the control to vehicle.
The suspension system of special designing is installed on automobile through the invention, be can be realized automobile in-place and is turned to, is horizontal horizontal
It moves and parking, facilitates parking to be put in storage, the mode of significantly convenient parking can help to the utilization rate for improving parking space.
Technical solution provided by the invention has the benefit that
1. traditional suspension, steering and transmission mechanism Integrated Solution are able to achieve -45 ° to 35 ° of wheel beam angle or so of corner
- 90 ° to 35 ° of wheel beam angle of turn may be implemented in constant interval, the virtual stub suspension system across core wheel of the independent research
To angle.
2. traditional suspension, steering and transmission mechanism Integrated Solution realize the linkage of left and right wheels by a turning machine,
The virtual stub suspension system across core wheel of the independent research not only has traditional turning function, also in traditional steering function
Innovative design single-wheel turns to autonomous control system on the basis of energy, and wherein EPS turning machine assembly 31 control system supports tradition to turn
To function；6 control system of electric pushrod assembly supports special turning function, and two control system integrations are in a suspension system
Under, by vehicle control unit controls, two systems are not interfere with each other, and structure and reliable performance.
3. the design of virtual stub causes the inside and outside state of wear of wheel inconsistent in traditional suspension solutions, common is outer
Side is seriously worn, inside mild wear, reduces Life of Tyre, influences traffic safety.The independent research passes through core wheel
Virtual stub suspension system is designed by structure, and virtual stub extended line is passed through wheel center point, is reduced wheel in this way and is turned
To frictional force, the power output and part stress of EPS turning machine assembly 31 and electric pushrod assembly 6, energy conservation and extension zero are reduced
Component benefits from the service life.The state of wear of side is almost consistent inside and outside tire simultaneously, extends Life of Tyre.
4. the virtual stub suspension system abnormity goat's horn and distributed driving motor across core wheel of independent research of the present invention
The structure of apolegamy interface can support the apolegamy of Multiple Type motor, chassis hardware and software platform expansion capability is strong, and reducing different dynamic needs
The basis research and development cost for the platform vehicle type asked.
5. the virtual stub suspension system across core wheel of independent research of the present invention can realize the steering of four kinds of special patterns
Function.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of suspension system.
Fig. 2 is the partial enlargement structural representation of Fig. 1.
Fig. 3 is the structural schematic diagram of special-shaped goat's horn.
Fig. 4 is the structural schematic diagram of Top Crossbeam.
Fig. 5 is the structural schematic diagram of transverse leaf spring assembly.
Fig. 6 is the structural schematic diagram of electric pushrod assembly.
Fig. 7 is the structural schematic diagram of lower swing arm.
Fig. 8 is the structural schematic diagram of wheel set.
Fig. 9 is 90 degree of corner state diagrams of single wheel under suspension system of the present invention.
Figure 10 is the structural schematic diagram of EPS turning machine assembly.
Figure 11 is the chassis platform structure schematic diagram that suspension system is constituted.
Figure 12 is common steering pattern working state figure.
Figure 13 is pivot stud mode state figure.
Figure 14 is to move horizontally mode state figure.
Figure 15 is park mode working state figure.
In figure: 1, special-shaped goat's horn, 3, Top Crossbeam, 4, body frame, 5, transverse leaf spring assembly, 6, electric pushrod assembly, 7,
Lower swing arm, 8, wheel set, 9, virtual stub (rotation centerline being made of the line of upper and lower swing arm bulb point)；10, cylinder
Sell bulb, 11, swing arm main body, 12, upper arm bush；13, shackle bracket, 14, steel plate leaf spring, 15, the fixed bracket of leaf spring vehicle body,
16, leaf spring ends mounting bracket；17, screw thread conversion support, 18, electric pushrod main body, 19, displacement sensor, 20, displacement sensing
Device mounting bracket, 21, screw thread conversion sleeve, 22, displacement sensor driving arm, 23, screw thread swivel sleeve, 24, conical surface pin ball
Head；25, fish-eye type bulb, 26, welded pipe main body, 27, bush for lower arm；28, tire, 29, wheel rim, 30, hub motor；31,EPS
Turning machine assembly, 32, pinion-and-rack steering engine, 33, universal joint, 34, EPS driving motor.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
It includes the suspension fork mechanism being installed between wheel set 8 and body frame 4 and installation that suspension system, which is embodied,
EPS turning machine assembly 31 and transverse leaf spring assembly 5 between two wheel sets 8 of 4 front/rear portion two sides of body frame,
4 four jiaos of body frame are mounted on a wheel set 8.
As depicted in figs. 1 and 2, each suspension fork mechanism includes special-shaped goat's horn 1, Top Crossbeam 3, electric pushrod assembly 6 and the bottom
Arm 7, special-shaped goat's horn 1 are located at 8 top of wheel set, the stator of the wheel shaft hub motor of special-shaped 1 lower end of goat's horn connection wheel set 8
Part, special-shaped goat's horn 1 and wheel set 8 are rotated around virtual stub 9, and wheel set 8 is rotated around the axis of oneself motor, rotating part
For hub motor rotor and 1 middle part of the wheel rim that is fixedly connected with the rotor and tire abnormity goat's horn and top respectively through lower swing arm 7, on
Transverse arm 3 is attached in parallel to body frame 4, and special-shaped 1 middle part of goat's horn is connected to EPS turning machine assembly 31 through electric pushrod assembly 6
One side end of side output end, transverse leaf spring assembly 5 is connected to Top Crossbeam 3.Specifically as shown in Figure 1,1 middle part of special-shaped goat's horn
Through 7 one end ball-joint of lower swing arm, 7 other end of lower swing arm and 4 rotary shaft of body frame are hinged, and special-shaped 1 top of goat's horn is through Top Crossbeam 3
One end ball-joint, 3 other end of Top Crossbeam and 4 rotary shaft of body frame are hinged.
As shown in figure 3, special-shaped goat's horn 1 is formed by multiple Split type supporting stand assembly and connections, it is Z-shaped in what is extended vertically.Point
It is Z-shaped three sections, is connected between the lower end of upper section and the upper end of lower section by horizontal segment, upper section and lower section is vertical and and horizontal
Duan Chuizhi, lower section are located at side in wheel set 8 and connect wheel set 8, and upper section is located at wheel set 8 after horizontal segment is bent
Top.
As shown in figure 4, Top Crossbeam 3 mainly by straight pin bulb 10, swing arm main body 11, the two upper assemblings of arm bush 12 and
At swing arm main body 11 is in herringbone, and the lambdoid set end of swing arm main body 11 is through 1 upper end ball of straight pin bulb 10 and special-shaped goat's horn
It is hinged, 11 lambdoid two divergent ends of swing arm main body are hinged through the uniaxial rotation of upper arm bush 12 and 4 top of body frame；Vehicle
It is equipped at the top of body skeleton 4 along the horizontally hinged axis of vehicle body direction/driving direction, 11 lambdoid two divergent ends warps of swing arm main body
Upper arm bush 12 is articulated with horizontally hinged axis.
As shown in fig. 7, lower swing arm 7 is mainly assembled by fish-eye type bulb 25, welded pipe main body 26 and two bush for lower arm 27
It forms, welded pipe main body 26 is in herringbone, and welded pipe main body 26 is formed by welding by multiple tubing element, and welded pipe main body 26 is lambdoid
Set end is connected through fish-eye type bulb 25 with special-shaped 1 middle part flexural pivot of goat's horn, 26 lambdoid two divergent ends warps of welded pipe main body
The uniaxial rotation of bush for lower arm 27 and 4 middle part of body frame is hinged；It is equipped in the middle part of body frame 4 along vehicle body direction/driving direction
Horizontally hinged axis, 26 lambdoid two divergent ends of welded pipe main body are articulated with horizontally hinged axis through bush for lower arm 27.
In specific implementation, as shown in figure 3, being equipped with ledge arrangement in the middle part of special-shaped goat's horn 1, welded pipe main body 26 is lambdoid
Set end is connected at ledge arrangement through fish-eye type bulb 25.The straight pin bulb 10 of Top Crossbeam 3 is located at the flake of lower swing arm 7
Right above formula bulb 25, the line of centres of straight pin bulb 10 and fish-eye type bulb 25 as virtual stub 9, wear by virtual stub 9
Cross the core wheel of wheel set 8.
As shown in fig. 6, electric pushrod assembly 6 is mainly by electric pushrod main body 18, displacement sensor 19, screw thread swivel sleeve
23, conical surface pin bulb 24 assembles, and displacement sensor 19 is fixedly attached to electronic push away by displacement transducer mounting bracket 20
The push rod parallel arrangement of bar main body 18, the probe rod of displacement sensor 19 and electric pushrod main body 18, and between passed by displacement
Sensor driving arm 22 is affixed, and the push rod output port of electric pushrod main body 18 is equipped with screw thread conversion sleeve 21, electric pushrod main body
18 push rod end from screw thread conversion sleeve 21 stretching after it is affixed with one end of screw thread swivel sleeve 23, screw thread swivel sleeve 23 it is another
End installation conical surface pin bulb 24, conical surface pin bulb 24 are threaded into the threaded hole of 23 other end of screw thread swivel sleeve；Special-shaped sheep
1 side of angle is equipped with L-type support, and 24 flexural pivot of conical surface pin bulb is in the L-type support that special-shaped 1 side of goat's horn is equipped with；Electric pushrod master
Pinion-and-rack steering engine 32 both ends of the opposite end of 18 push rod end of body through screw thread conversion support 17 and EPS turning machine assembly 31 are defeated
Wherein one end of outlet is affixed.
Electric pushrod main body 18 is run, the flexible spy for driving screw thread swivel sleeve 23 and displacement sensor 19 of push rod end
Head rod is mobile, and screw thread swivel sleeve 23 is mobile to push special-shaped goat's horn 1 to rotate around virtual stub 9 through conical surface pin bulb 24, Jin Ershi
The steering of existing wheel set 8.Further, suspension fork mechanism is respectively corresponded to by 4 two sides wheel set 8 of control body frame respectively
Electric pushrod main body 18, realize that the wheel set 8 of 4 two sides of body frame is respectively different and turn to, asynchronous steering.
As shown in figure 5, transverse leaf spring assembly 5 is mainly assembled by steel plate leaf spring 14, shackle bracket 13, steel plate leaf spring 14
On both sides of the middle be fixed on body frame 4 through fixed 15 levels of bracket of two leaf spring vehicle bodies, the end of steel plate leaf spring 14 is plate
Spring end mounting bracket 16, swing arm main body 11 of the leaf spring ends mounting bracket 16 through shackle bracket 13 and Top Crossbeam 3 are hinged.It hangs
13 one end of ear supporter and leaf spring ends mounting bracket 16 are hinged, and it is lambdoid that 13 other end of shackle bracket is hinged to swing arm main body 11
Middle part.
In specific implementation, transverse leaf spring assembly 5 further replaces with column damper, and column damper includes helical spring
And damper, column damper are connected between body frame 4 and Top Crossbeam 3.When impact of the wheel by vertical road surface direction
When with bounce, transverse leaf spring can effectively play buffer function as elastic element, but itself does not have the effect of damping,
And horizontal space occupies greatly.The function of transverse leaf spring may be implemented as elastic element for helical spring in column damper, and
It is compact-sized；Damper can inhibit the bounce of helical spring simultaneously, absorb resulting vibration, improve the flat of vehicle driving
It is pliable.Compared to transverse leaf spring structure, column damper can use smaller arrangement space, both meet vehicle load-carrying need
It asks, and effectively inhibits impact of the road surface to vehicle body, the function of bumper and absorbing shock is provided, the comfort of vehicle traveling is promoted.
As shown in Figure 10, EPS turning machine assembly 31 mainly drives electricity by pinion-and-rack steering engine 32, universal joint 33, EPS
Machine 34 assembles, and EPS driving motor 34 is fixed on body frame 4, and 34 output shaft of EPS driving motor is through universal joint 33 and tooth
Take turns the input terminal connection of rack steering machine 32,32 output end of pinion-and-rack steering engine.The operation of EPS driving motor 34 drives gear teeth
Rack bar in turning machine 32 level between two wheel sets 8 of 4 two sides of body frame moves back and forth, and then through electronic
Push rod main body 18 (can regard rigid rod as at this time) pushes the wheel set 8 of two sides is synchronous to turn to.
As shown in figure 8, wheel set 8 is mainly assembled by tire 28, wheel rim 29 and hub motor 30, pacify outside wheel rim 29
Tire 28,29 center installation hub motor 30 of wheel rim are filled, the stationary part of hub motor 30 is fixedly attached to the bottom of special-shaped goat's horn 1
End, the rotor portion of hub motor are fixedly connected with wheel rim 29.Rotor is fixedly connected with wheel rim 29 when hub motor 30 is run, into
And the wheel rotation for driving wheel rim 29 and tire 28 to constitute.
Wheel set 8 connects entire car controller, every by modes, real-time controls such as polling power controlling, torque vector controls
The torque and revolving speed of a motor guarantee the correctness of direction of motor rotation and driving torque in different modes.
Each main parts size assembly technology is (vehicle frame two sides bilateral symmetry, by taking left side as an example) in the present invention:
1) the straight pin bulb 10 at 3 herringbone set end of Top Crossbeam is inserted into the empty slot hole that special-shaped 1 top surface of goat's horn is equipped with,
Locking is laterallyd secure by bolts and nuts, so that Top Crossbeam 3 is connected through straight pin bulb 10 with special-shaped 1 upper end flexural pivot of goat's horn；
Two of 3 two divergent ends of herringbone of Top Crossbeam upper arm bush 12 are mounted on to the top of two vertical racks of body frame 4
On, it is locked by the way that bolt and nut is fixed, so that Top Crossbeam 3 is through upper arm bush 12 and 4 top of body frame around trunnion axis rotating hinge
It connects.
2) the flake bulb 25 at 7 herringbone set end of lower cross arm is mounted in the bracket in special-shaped 1 middle position of goat's horn, is led to
The fixed locking of bolt and nut is crossed, so that lower cross arm 7 is connected through flake bulb 25 with special-shaped 1 middle part flexural pivot of goat's horn；By 7 people of lower cross arm
Two bush for lower arm 27 of two divergent ends of font are mounted on the middle part of two vertical racks of body frame 4, pass through bolt
The fixed locking of nut, so that lower cross arm 7 rotates hingedly through bush for lower arm 27 and 4 middle part of body frame around trunnion axis.
3) the fixed bracket 15 of two leaf spring vehicle bodies of plate spring assembly 5 is mounted on body frame 4, it is solid by bolt and nut
Lock is tight；Two shackle brackets 13 of plate spring assembly 5 are fixed in the bracket in the swing arm main body 11 of upper swing arm 3, spiral shell is passed through
The fixed locking of bolt nut.
4) pinion-and-rack steering engine 32 of EPS turning machine assembly 31 is fixed on body frame 4 by bolt and nut
Locking；The EPS driving motor 34 of EPS turning machine assembly 31 is mounted on body frame 4, is locked by the way that bolt and nut is fixed.
5) conical surface pin bulb 24 of electric pushrod assembly 6 is inserted into the mounting hole that special-shaped 1 side L-type support of goat's horn opens up
In, it is locked by the way that nut is fixed；The screw thread conversion support 17 of electric pushrod assembly 6 is mounted on 32 end of pinion-and-rack steering engine
Stud on, pass through the fixed locking of nut.
As shown in figure 11, it is disposed as suspension system of the invention at four wheels of chassis platform quadrangle, constituted
Realize the distributed driving chassis platform of four-wheel independent steering.Has the Working mould there are two types of course changing control under the working platform of chassis
Formula, one kind carrying out course changing control by EPS turning machine assembly 31, and another kind carries out course changing control by electric pushrod main body 18,
Both front and back control independently carries out, and is directed to vehicle driving state and halted state respectively, does not exist simultaneously.That is EPS is turned to
When machine assembly 31 works, 18 fixing lock of electric pushrod main body stubbornly refuses work；When electric pushrod main body 18 works, EPS turning machine is total
Stubbornly refuse work at 31 fixing locks.
Under vehicle driving state, two wheel sets 8 of 4 front/rear portion two sides of body frame are commonly through an EPS
Turning machine assembly 31 synchronizes course changing control, can be realized the steering of running car.
Under automobile suspended state, each wheel set 8 carries out course changing control, energy by respective electric pushrod main body 18
Enough realize the pivot stud and commutation translation traveling of automobile.
The principle process of specific two kinds of operating modes is as follows:
1, under vehicle driving state, 31 control system operating mode of EPS turning machine assembly:
Entire car controller input control EPS driving motor 34 is allowed to generate the power steering torque of determining size and Orientation,
The torque is transmitted on universal joint 33, then drives pinion-and-rack steering engine 32 by universal joint 33, is made in pinion-and-rack steering engine 32
Rackwork realization in portion's slides laterally, and output pushes special-shaped goat's horn 1 to rotate around virtual stub 9 through electric pushrod assembly 6, and then pushes away
Level moves back and forth between two wheel sets 8 of dynamic 4 two sides of body frame.The specifically conical surface pin ball of electric pushrod assembly 6
First 24 pull on/push special-shaped goat's horn 1, and special-shaped goat's horn 1 is rotated around virtual stub 9, and band motor car wheel is total again for special-shaped goat's horn 1
At rotation, wheel steering is realized.
When this operating mode, electric pushrod assembly 6 be do not work and electric pushrod main body 18 be in self-locking state, it is electronic
6 overall dimensions of push rod assembly will not change, and current function is the rod piece of a regular length.
2, under automobile suspended state, 6 control system of electric pushrod assembly:
Entire car controller input control electric pushrod main body 18, the motor inside electric pushrod main body 18 will drive electronic push away
The push rod of bar main body 18 itself is stretched out or is retracted, and realizes elongating or shortening for the overall dimensions of electric pushrod assembly 6, electronic to push away
The conical surface pin bulb 24 of bar assembly 6 pulls on special-shaped goat's horn 1, and special-shaped goat's horn 1 will be rotated with virtual stub 9, special-shaped goat's horn
1 drives wheel set to rotate again, realizes wheel steering.
The displacement that push rod is stretched out or retracted is detected by displacement sensor 19, monitoring electric pushrod main body 18 is stretched
Whether contracting amount reaches the target value of central controller input.If do not reached, according to the monitoring numerical value of the offer of displacement sensor 19
The stroke of electric pushrod main body 18 is looked after and guided until consistent with target value.
When this operating mode, the EPS driving motor in EPS turning machine assembly 31 is in self-locking state and in zero point position
It sets, without any corner state, the rack gear inside pinion-and-rack steering engine 32 is irremovable.
Under the 2nd kind of operating mode, the chassis platform that the present invention is embodied due to the suspension using brand-new design and turns
To system, so that each wheel can realize independent, non-interference steering, include common turn with rear-wheel follow-up steering
To mode, pivot stud mode, horizontal shifting mode and park mode.
A, with the common steering pattern of rear-wheel follow-up steering
As shown in figure 12, two wheel sets 8 of 4 front part sides of vehicle frame rotate to the left (rotation angle can be different), vehicle frame 4
Two wheel sets 8 of rear portion two sides rotate to the right (rotation angle can be different), and four wheels are around a point on the left of vehicle body at this time
For center of circle rotation, common turning function is realized.
If being upwards right ahead, electric pushrod control system does not work always under the mode, by front and back EPS motor
Module executes movement complete entirely to turn to.
When demand angular signal is transmitted to entire car controller, using treated, signal is transmitted to EPS controller, EPS
Controller controls EPS motor work, according to the angular signal for the rotary angle transmitter Real-time Feedback being had in EPS motor module, when
EPS motor stops working after reaching target rotation angle.Motor output corner is transmitted to turning machine input shaft by universal joint at this time,
Input shaft rotates, and because being gear & rack structure inside turning machine, it is flat that the steering wheel of pinion and-rack is changed into revolute
Pair is moved, so have the variation of input shaft input angle, and rack gear output displacement variable, then Abnormal Knuckles are driven by steering linkage
And wheel rotates around virtual stub and realizes go to action, realizes front-wheel steer function in the normal mode at this time.
The mode also has a rear-wheel follow-up steering function, angular signal exported after entire car controller is handled new signal to
Rear-wheel EPS controller.Assuming that front-wheel needs, front-wheel EPS motor control front-wheel steering wheel rack gear, which moves right, to be realized,
After rear-wheel EPS motor receives signal at this time, control rear-wheel steering wheel rack gear, which moves right, realizes follow-up steering function.
B, pivot stud mode
As shown in figure 13, two wheel sets 8 after vehicle frame 4 is left front and right rotate to the right, and vehicle frame 4 is left back and right preceding two
A wheel set 8 rotates to the left, and a point of four wheels around vehicle body center is center of circle rotation at this time, realizes pivot stud function
Energy.
If being upwards right ahead, before entering the mode, front and back wheel should be at the position of straight trip, at this time EPS corner
Sensor is in mark zero position.Simultaneously in this mode, EPS motor can not execute other movements, always in mark zero position.It should
Under mode, the elongation of electric pushrod assembly is realized by control push-rod electric machine.
When starting pivot stud function, after entire car controller VCU obtains target rotation angle, four push-rod electric machines are synchronous to start work
Make, executes the movement of electric pushrod elongation.When the elongation needed for controller detects the signal satisfaction of sensor output, accordingly
Push-rod electric machine stop working and locking mechanism.Four-wheel and same circle are tangent at this time, and the center of circle is in antero posterior axis central point line
Point.Subsequent driving motor is controlled four wheels and is rotated with corresponding torque and direction of rotation, after rotation angle reaches target rotation angle,
Braking maneuver is executed, vehicle stops.
C, horizontal shifting mode
As shown in figure 14, four wheel sets 8 of vehicle frame 4 all around are rotated into the side perpendicular to former normally travel
To four wheels realize horizontal shifting function along moving perpendicular to length of wagon direction horizontal cross at this time.
If being upwards right ahead, before entering the mode, front and back wheel should be at the position of straight trip, at this time EPS corner
Sensor is in zero standard position.Simultaneously in this mode, EPS motor can not execute other movements, always in mark zero position.It should
Under mode, the elongation of electric pushrod assembly is realized by control push-rod electric machine.
When starting horizontal shifting function, after entire car controller VCU obtains direction signal, four push-rod electric machines are synchronous to start work
Make, executes the movement of electric pushrod elongation.When the elongation needed for controller detects the signal satisfaction of sensor output, accordingly
Push-rod electric machine stop working and locking mechanism.Four-wheel all has rotated 90 ° relative to original state at this time, is in a horizontal position.
Subsequent driving motor is controlled four wheels and is rotated with corresponding torque and direction of rotation, when plateau levels move to reach target position
Afterwards, braking maneuver is executed, vehicle stops.
D, park mode
As shown in figure 15, two wheel sets 8 after vehicle frame 4 is left front and right rotate to the left, and vehicle frame 4 is left back and right preceding two
A wheel set 8 rotates to the right, and four wheels radially, can not rotate at this time, realizes parking function.
If being upwards right ahead, before entering the mode, front and back wheel should be at the position of straight trip, at this time EPS corner
Sensor is in zero standard position.Simultaneously in this mode, EPS motor can not execute other movements, always in mark zero position.It should
Under mode, the shortening of electric pushrod assembly is realized by control push-rod electric machine.
When starting parking function, after entire car controller VCU obtains control signal, four push-rod electric machines are synchronous to start to work,
Execute the shortening movement of electric pushrod.When the shortening amount needed for controller detects the signal satisfaction of sensor output, accordingly
Push-rod electric machine stops working and locking mechanism.After completing the execution movement of the mode, the mechanism position of four-wheel forms mechanical lock
Extremely, vehicle can not move in situ.
It can be seen that technical solution of the present invention realizes the turning function of four kinds of special patterns, and than traditional steering system
System have bigger steering angle, by taking the near front wheel wheel beam angle as an example, angle range be -90 ° to 35 °, wherein -35 ° to 35 ° meet it is general
Logical mode turns to demand, and -90 ° to -35 ° meet pivot stud and horizontal shifting mode.
Claims (8)
1. a kind of virtual stub suspension system across core wheel, it is characterised in that: including being installed on single wheel set (8) and vehicle
It a suspension fork mechanism between body skeleton (4) and is installed between two wheel sets (8) of body frame (4) two sides
EPS turning machine assembly (31) and transverse leaf spring assembly (5), suspension fork mechanism include special-shaped goat's horn (1), Top Crossbeam (3), electric pushrod
Assembly (6) and lower swing arm (7), special-shaped goat's horn (1) are located above wheel set (8), and special-shaped goat's horn (1) lower end connects wheel set
(8), in the middle part of special-shaped goat's horn (1) and top is connected to body frame (4), special-shaped goat's horn through lower swing arm (7), Top Crossbeam (3) respectively
(1) middle part is connected to the side output end of EPS turning machine assembly (31), transverse leaf spring assembly (5) through electric pushrod assembly (6)
A side end be connected to Top Crossbeam (3).
2. a kind of virtual stub suspension system across core wheel according to claim 1, it is characterised in that:
The Top Crossbeam (3) mainly by straight pin bulb (10), swing arm main body (11), two upper arm bush (12) assemblings and
At swing arm main body (11) is in herringbone, and the lambdoid set end of swing arm main body (11) is through straight pin bulb (10) and special-shaped goat's horn
(1) upper end flexural pivot connects, and lambdoid two divergent ends of swing arm main body (11) are through upper arm bush (12) and body frame (4) top
Single shaft rotation is hinged；The lower swing arm (7) is mainly by fish-eye type bulb (25), welded pipe main body (26) and two bush for lower arm
(27) assemble, welded pipe main body (26) is in herringbone, and the lambdoid set end of welded pipe main body (26) is through fish-eye type bulb
(25) it is connected with flexural pivot in the middle part of special-shaped goat's horn (1), lambdoid two divergent ends of welded pipe main body (26) are through bush for lower arm (27)
It is hinged with rotation uniaxial in the middle part of body frame (4)；The straight pin bulb (10) of the Top Crossbeam (3) is located at lower swing arm (7)
Right above fish-eye type bulb (25), the line of centres of straight pin bulb (10) and fish-eye type bulb (25) as virtual stub (9),
Virtual stub (9) passes through the core wheel of wheel set (8)；
The electric pushrod assembly (6) is mainly by electric pushrod main body (18), displacement sensor (19), screw thread swivel sleeve
(23), conical surface pin bulb (24) assembles, and displacement sensor (19) is fixedly connected by displacement transducer mounting bracket (20)
To electric pushrod main body (18), the probe rod of displacement sensor (19) and the push rod parallel arrangement of electric pushrod main body (18), and
Between it is affixed by displacement sensor driving arm (22), the push rod end of electric pushrod main body (18) stretch out after with screw thread conversion sleeve
One end of cylinder (23) is affixed, and the other end of screw thread swivel sleeve (23) installs conical surface pin bulb (24), conical surface pin bulb (24) ball
It cuts with scissors in the L-type support that special-shaped goat's horn (1) side is equipped with；Electric pushrod main body (18) turns through screw thread conversion support (17) and EPS
It is affixed to wherein one end of machine assembly (31) both ends output end；
The transverse leaf spring assembly (5) is mainly assembled by steel plate leaf spring (14), shackle bracket (13), steel plate leaf spring (14)
On both sides of the middle be fixed on body frame (4) through fixed bracket (15) levels of two leaf spring vehicle bodies, the end of steel plate leaf spring (14)
Portion is leaf spring ends mounting bracket (16), swing arm of the leaf spring ends mounting bracket (16) through shackle bracket (13) and Top Crossbeam (3)
Main body (11) is hinged.
3. a kind of virtual stub suspension system across core wheel according to claim 2, it is characterised in that:
Hingedly, shackle bracket (13) other end is hinged to for described shackle bracket (13) one end and leaf spring ends mounting bracket (16)
Swing arm main body (11) lambdoid middle part.
4. a kind of virtual stub suspension system across core wheel according to claim 2, it is characterised in that:
The EPS turning machine assembly (31) is mainly by pinion-and-rack steering engine (32), universal joint (33), EPS driving motor
(34) assemble, EPS driving motor (34) is fixed on body frame (4), and EPS driving motor (34) output shaft is through universal joint
(33) it is connected with the input terminal of pinion-and-rack steering engine (32), pinion-and-rack steering engine (32) output end.
5. a kind of virtual stub suspension system across core wheel according to claim 1, it is characterised in that:
The special-shaped goat's horn (1) is formed by multiple Split type supporting stand assembly and connections, and Z-shaped three sections, the lower end of upper section are divided into
Connected between the upper end of lower section by horizontal segment, upper section and lower section it is vertical and and horizontal segment it is vertical, it is total that lower section is located at wheel
At (8) interior side and wheel set (8) are connected, upper section is located above wheel set (8) after horizontal segment is bent.
6. a kind of virtual stub suspension system across core wheel according to claim 1, it is characterised in that:
The wheel set (8) is mainly assembled by tire (28), wheel rim (29) and hub motor (30), and wheel rim (29) is outside
It installs tire (28), wheel rim (29) center installation hub motor (30), the stationary part of hub motor (30) is connected to special-shaped sheep
The bottom end at angle (1).
7. a kind of virtual stub suspension system across core wheel according to claim 1 or 2, it is characterised in that: described
Transverse leaf spring assembly (5) replaces with column damper, and column damper is connected between body frame (4) and Top Crossbeam (3).
8. -7 any a kind of virtual stub suspension system across core wheel according to claim 1, it is characterised in that: described
Suspension system be used for automobile chassis, can be realized four-wheel independent steering.
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| US11571939B2 (en) | 2020-10-13 | 2023-02-07 | Xtravel Suspension, Llc | Suspension system |
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