CN107757380A - A kind of integrated electric energy assisted braking system - Google Patents
A kind of integrated electric energy assisted braking system Download PDFInfo
- Publication number
- CN107757380A CN107757380A CN201711067098.2A CN201711067098A CN107757380A CN 107757380 A CN107757380 A CN 107757380A CN 201711067098 A CN201711067098 A CN 201711067098A CN 107757380 A CN107757380 A CN 107757380A
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- push rod
- face
- rear end
- end cap
- assisted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/24—Electrodynamic brake systems for vehicles in general with additional mechanical or electromagnetic braking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/746—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive and mechanical transmission of the braking action
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Braking Elements And Transmission Devices (AREA)
Abstract
The invention provides a kind of integrated electric energy assisted braking system, including motor, planetary gearsets, ball screw framework, nut connection in planetary gear and roller screw mechanism in planetary gearsets, pedal push rod passes through elastic reaction disk, the output axis connection of power-assisted push rod and master cylinder, there is PTS on pedal push rod, master cylinder passes through fluid pressure line, pressure sensor, two two-position two-way solenoid valves are connected with hydraulic control unit, hydraulic control unit is connected by brake piping with four disk brakes on vehicle, PTS, two-position two-way solenoid valve, hydraulic control unit, the electronic control unit of pressure sensor and vehicle connects；The present invention realized to slow down using two-stage transmission mechanism and increased torsion effect using motor as power source, and the rotation of motor output is converted into translation output, gearratio greatly, high transmission accuracy, transmission efficiency and compact-sized.
Description
Technical field
The invention belongs to the brake device for car field in Vehicle Engineering, is related to a kind of integrated electric power brake
System.
Background technology
With the fast development of electric automobile, intelligent automobile, the brake fluid system of traditional vacuum booster formula is
It can not meet to require.Because electric booster braking system eliminates the vacuum booster generally used on orthodox car, and can
To realize the decoupling of friction brake force and regenerative braking force, and simple in construction, arrangement is conveniently, therefore will turn into brakes and develop
Inevitable direction.
System shown in patent CN 104709096A, it uses worm and gear and rack-and-pinion as Jian Zengniu mechanisms, worm gear
The transmission efficiency of worm screw is low, serious wear, and the axial force of worm screw is bigger；And unilateral rack pinion scheme can produce
Raw certain deflecting force, easily causes mechanism resistance excessive or even stuck.And the active force of people and motor can not realize decoupling,
Easily cause thrashing.
System shown in patent CN 104118416A, it uses the single-stage speed reducing of nuts ball leading screw, and speed reducing ratio is small, therefore
Require higher for output power of motor and output torque, therefore motor size is big, cost of manufacture is higher；Further, since motor
Rotor do not fix, therefore it may deflect and cause radial load excessive.
System shown in patent CN 106240552A, it uses the two-stage of straight spur gear and nuts ball leading screw to be driven
Mode, but because transmission is more and size is big, hence in so that the axial dimension of whole system is longer, it is unfavorable for vehicle cloth
Put.
The content of the invention
The present invention carries to overcome existing for prior art the defects of transmission scheme is poorly efficient, gearratio is small, physical dimension is big
A kind of integrated electric energy assisted braking system is supplied.
A kind of integrated electric energy assisted braking system, it is characterised in that including an electric machine casing and a planetary gear
Housing, using the direction of operator brake power input as front, pass through an Intermediate Gray between electric machine casing and planet gear carrier
The middle end cap for having manhole is fixed, and planet gear carrier front end is covered by a drive end bearing bracket, and motor is provided with electric machine casing,
Motor includes motor stator and rotor, and the leading portion of the rear end cap of a hollow ladder shaft-like is pilot pin section, rear end cap
Back segment be big axle journal section, the pilot pin section of rear end cap is stretched into inside electric machine casing, electric machine casing rear end by rear end cap big axle
Cervical part of esophagus is covered, and motor stator is fixed on inside electric machine casing, and a rotor for carrying axis hole, electricity are provided with motor stator
The shaft hole sleeve of machine rotor has vertical on the external cylindrical surface of rear end cap pilot pin section on the front end face of the big axle journal section of rear end cap
In the bearing race snap for having the ring-type perpendicular to the end face on the bearing race snap of the ring-type of the end face, the rear end face of middle end cap,
Rotor is supported in the bearing race snap on rear end cap by an angular contact ball bearing, and rotor passes through another angle
Contact ball bearing is supported in the bearing race snap that middle-end covers；There are a set of planetary gearsets, planet inside planet gear carrier
Gear train includes gear ring being fixed in planet gear carrier, a circumferential inner that is concentric with gear ring and being located at gear ring
Sun gear and four planetary gears being uniformly arranged between gear ring and sun gear, each planetary gear are nibbled with gear ring and sun gear simultaneously
Closing, the rear end face of sun gear is located in the manhole of middle end cap and is fixedly connected by screw with the front end face of rotor,
One nut is hollow stepped revolving meber, and the leading portion of nut is pilot pin section, and the back segment of nut is big axle journal section, nut
Inner cylinder face is machined with arc helicla flute, and each planetary gear is assembled by the big axle journal section of a planet wheel spindle and nut, nut
Pilot pin section be supported on by two taper roll bearings inside planet gear carrier, a hollow lead screw is hollow cylinder
Shape revolving meber, is also machined with arc helicla flute on the external cylindrical surface of hollow lead screw, the arc spiral on hollow lead screw external cylindrical surface
Groove is engaged to form a helical duct with the arc helicla flute on nut inner cylinder face, is equipped with the helical duct multiple spherical
Ball, hollow lead screw, nut and spherical ball composition ball screw framework, the rear end of a cylindrical pedal push rod pass through sky
The hollow bulb of heart leading screw, groove, a power-assisted push rod for being located at rear end cap hollow bulb are provided with hollow lead screw rear end face vertically
Front space coordinate in the groove being arranged on hollow lead screw rear end face, pedal push rod front end and a pedal push rod connector
Rear end be fixedly connected, the front end of pedal push rod connector is used for the brake pedal for connecting vehicle, a PTS
Including a PTS main body and a sliding magnet being slidably matched with PTS main body, pedal row
Journey sensor main body is fixedly connected with vehicle frame, and sliding magnet is fixed on rear end face and the pedal push rod front end of pedal push rod connector
Between face, first return spring, power-assisted push rod middle part are provided between the front end of pedal push rod and the front end face of drive end bearing bracket
A return block is set with, a master cylinder is fixed on rear end cap, and the piston push rod of master cylinder stretches into the hollow bulb of rear end cap leading portion,
Piston push rod is fixedly connected with power-assisted putting back-end, and one second is provided between the front end face of master cylinder and the rear end face of return block
Return spring, master cylinder are fixed on rear end cap, and two inlets of master cylinder are connected with a fluid reservoir, a liquid outlet of master cylinder
It is connected by fluid pressure line with the inlet of a No.1 two-position two-way solenoid valve, another liquid outlet of master cylinder passes through hydraulic tube
The inlet connection of Lu Yuyi tee pipe coupling, a liquid outlet of tee pipe coupling are passed by fluid pressure line and a pressure
The inlet connection of sensor, another liquid outlet of tee pipe coupling pass through fluid pressure line and No. two two-position two-way solenoid valves
Inlet connection, the liquid outlet of No.1 two-position two-way solenoid valve entered by one of fluid pressure line and a hydraulic control unit
Liquid mouth is connected, and the liquid outlet of No. two two-position two-way solenoid valves is connected by another of fluid pressure line and hydraulic control unit inlet
Connect, four liquid outlets of hydraulic control unit pass through brake hydraulic line and four disks on four wheels of vehicle respectively
The signal output part of the inlet connection of formula brake, PTS and pressure sensor passes through data wire and car respectively
The signal input part connection of electronic control unit in, motor, No.1 two-position two-way solenoid valve, No. two two-position two-way solenoid valves
Connected respectively by the output end of data wire and electronic control unit with the respective signal receiving end of hydraulic control unit.
Further technical scheme includes：
Described sun gear is hollow step structure, and sun gear leading portion is pilot pin section, and back segment is big axle journal section, preceding
Leave escape between section and back segment, the pilot pin section of sun gear is provided with the gear teeth, big axle journal section using the axis of rotation of sun gear as
Center line is uniformly provided with four screwed holes, the front end face of rotor position corresponding with four on sun gear screwed holes
Four screwed holes are provided with, the big axle journal section of sun gear is fixedly connected by screw with the front end face of rotor.
There is the pedal push rod forward extended out a connecting shaft on pedal push rod front end face, be provided with pedal push rod connecting shaft outer
Screw thread, pedal push rod connector rear end are provided with internal thread, and pedal push rod passes through pedal push rod connecting shaft and pedal push rod connector
Threaded connection, for transmitting brake force.
Described power-assisted push rod is a stepped cylindrical revolving body, and the leading portion of power-assisted push rod is big axle journal section, the big axle
Cervical part of esophagus line centered on the axis of rotation of power-assisted push rod is provided with a blind cylindrical hole, and the elastic reaction of cylinder is provided with blind hole
Disk, the height of elastic reaction disk are more than the depth of the blind hole of power-assisted push rod, and the back segment of power-assisted push rod is pilot pin section, the pilot pin
Section line centered on the axis of rotation of power-assisted push rod is provided with a screwed hole, and external screw thread is provided with piston push rod, power-assisted push rod
Pilot pin section is threadedly coupled with piston push rod, and the intersegmental gap of big axle journal of power-assisted push rod, which coordinates, to be arranged on hollow lead screw rear end face
In groove.
Described return block is a hollow cylindrical stepped revolving meber, and the leading portion of return block is big axle journal section, back segment
For pilot pin section, return block is sleeved on the pilot pin section of power-assisted push rod, front end face and the power-assisted push rod of the big axle journal section of return block
Big axle journal section rear end face contact, the second return spring is arranged on the rear end of the front end face of master cylinder and the pilot pin section of return block
Between face.
Described motor stator is provided with equally distributed bar-shaped trough, motor casing on its external cylindrical surface along axis of rotation direction
Bar shaped pin, the bar-shaped trough of motor stator and electric machine casing inner stripe pin interference are provided with position corresponding with motor stator in vivo
Coordinate, motor stator is fixed in electric machine casing, described rotor is provided with projection at middle part, and raised front side passes through
One angular contact ball bearing is supported on middle-end and covered, and raised rear side is supported on right end cap by another angular contact ball bearing
On, interference fits are installed between rotor and angular contact ball bearing, and angular contact ball bearing is matched somebody with somebody with middle end cap and right end cap transition
Close installation.
There is the projection of annular shape on the external cylindrical surface of pedal push rod front end, the first return spring is arranged on the convex of the annular shape
Rise between the front end face of drive end bearing bracket.
Described the first return spring and the second return spring is cone shaped spring.
Compared with prior art the beneficial effects of the invention are as follows：
1. integrated electric energy assisted braking system of the present invention, using hollow motor as power source, is passed with two-stage
Motivation structure, which is realized to slow down, increases torsion effect, and the rotation output of motor is converted into translation output.First gear stage is row
Star gear mechanism, the second level are ball screw framework, and gearratio is big, high transmission accuracy, transmission efficiency and compact-sized, significantly
Improve the braking ability of vehicle.
2. the electric booster braking system of the present invention is not only only capable of improving the braking ability of vehicle, and can implement actively
The functions such as braking, failure backup and Brake energy recovery, moreover it is possible to be effectively integrated ESP (ESP), adaptive cruise
Active control technologies such as (ACC) is controlled, realizes that Vehicular intelligentization controls.
3. the nut in pinion frame and secondary drive mechanism in primary transmission mechanism of the present invention is as one
Body, therefore number of components can be effectively reduced, make structure compacter.
4. electric machine casing of the present invention does pattern handling, master cylinder leading portion is set to extend into the hollow bulb of rear end cap,
Effectively reduce the axial dimension of electric booster braking system.
5. elastic reaction disk of the present invention is positioned in the blind hole of power-assisted push rod, encapsulation is good, prevents because of radial load
Excessive potential safety hazard caused by causing reaction tray excessive deformation.
6. integrated electric energy assisted braking system of the present invention has done smaller change on the basis of existing brakes
It is dynamic, facilitate real vehicle to install, it is portable good, and be easy to external equipment and carry out test experiments.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings：
Fig. 1 is a kind of structural representation of integrated electric energy assisted braking system of the present invention；
Fig. 2 is the structural representation of power coupling part in a kind of integrated electric energy assisted braking system of the present invention
Figure；
Fig. 3 is the isometric view of the sun gear in a kind of integrated electric energy assisted braking system of the present invention；
Fig. 4 is the isometric view of the power-assisted push rod in a kind of integrated electric energy assisted braking system of the present invention；
Fig. 5 is that the PTS in a kind of integrated electric energy assisted braking system of the present invention pushes away with pedal
The assembly relation schematic diagram of joint element for bar and pedal push rod；
A kind of Fig. 6 electric booster braking systems of the present invention in pressure sensor and tee pipe coupling connection
Schematic diagram.
In figure：1. pedal push rod connector, 2. first return springs, 3. drive end bearing brackets, 4. planet gear carriers, the rolling of 5. circular cones
Sub- bearing, 6. planetary gear shafts, 7. planetary gears, end cap in 8., 9. electric machine casings, 10. angular contact ball bearings, 11. rear end caps,
12. pedal push rod, 13. hollow lead screws, 14. spherical balls, 15. nuts, 16. sun gears, 17. gear rings, 18. rotors, 19.
Motor stator, 20. elastic reaction disks, 21. power-assisted push rods, 22. return blocks, the piston push rod of 23. master cylinder 23,24., 25. second times
Position spring, 26. fluid reservoirs, 27. No.1 two-position two-way solenoid valves, 28. No. two two-position two-way solenoid valves, 29. hydraulic control units,
30. disk brake, 31. PTS main bodys, 32. pressure sensors, 33. sliding magnets, 34. tee pipe couplings.
Embodiment
Description is made to the present invention below in conjunction with the accompanying drawings：
Refering to Fig. 1, a kind of integrated electric energy assisted braking system of the present invention, including an electric machine casing 9, one
Planet gear carrier 4 and a middle end cap 8.Using the direction of operator brake power input as front.The rear end of planet gear carrier 4
Face, middle end cap 8, the front end face of electric machine casing 9 are all evenly distributed the screwed hole of four same sizes, planet gear carrier 4
Rear end face, middle end cap 8, the front end face of electric machine casing 9 connected by bolt and nut.The front end of planet gear carrier 4 is by before one
End cap 3 covers, and both are connected by screw.
Refering to Fig. 1, motor is provided with electric machine casing 9, motor includes motor stator 19 and rotor 18, and one hollow
The leading portion of rear end cap 11 of ladder shaft-like be pilot pin section, the back segment of rear end cap 11 is big axle journal section, the small axle of rear end cap 11
Cervical part of esophagus is stretched into inside electric machine casing 9, and the rear end of electric machine casing 9 is closed by the big axle journal section lid of rear end cap 11.Described motor stator 19
Equally distributed bar-shaped trough is provided with along axis of rotation direction on its external cylindrical surface, electric machine casing 9 is interior right with motor stator 19
The position answered is provided with bar shaped pin, bar-shaped trough and the inner stripe pin of electric machine casing 9 interference fit of motor stator 19, makes motor stator
19 are fixed in electric machine casing 9.
Refering to Fig. 1, a rotor 18 for carrying axis hole, the shaft hole sleeve of rotor 18 are provided with motor stator 19
On the external cylindrical surface of the pilot pin section of rear end cap 11, have on the front end face of the big axle journal section of rear end cap 11 perpendicular to the end face
The bearing race snap of ring-type, there are the bearing race snap of the ring-type perpendicular to the end face, rotor 18 on the rear end face of middle end cap 8
It is supported on by an angular contact ball bearing 10 in the bearing race snap on rear end cap 11, rotor 18 is identical by another
The angular contact ball bearing 10 of specification is supported in the bearing race snap on middle end cap 8.
Refering to Fig. 1, there are a set of planetary gearsets inside planet gear carrier 4, planetary gearsets are expert at including a fixation
Gear ring 17, one in star gear housing 4 is concentric with gear ring 17 and is located at the sun gear 16 of the circumferential inner of gear ring 17 and four
The planetary gear 7 being uniformly arranged between gear ring 17 and sun gear 16, each planetary gear 7 are nibbled with gear ring 17 and sun gear 16 simultaneously
Close, four planetary gears 7 can both revolve round the sun around the axis of rotation of sun gear 16 again around own axes each rotation.
Refering to Fig. 1 and Fig. 3, described sun gear 16 is hollow step structure, and the leading portion of sun gear 16 is pilot pin section,
Back segment is big axle journal section, leaves escape between leading portion and back segment, and the pilot pin section of sun gear 16 is provided with the gear teeth, big axle journal section with
Line is uniformly provided with four screwed holes centered on the axis of rotation of sun gear 16, the front end face of rotor 18 with sun gear 16
Four screwed holes corresponding to position be also provided with four screwed holes, the big axle journal section of sun gear 16 passes through screw and rotor 18
Front end face be fixedly connected.
Refering to Fig. 1, a nut 15 is hollow stepped revolving meber, and the leading portion of nut 15 is pilot pin section, nut 15
Back segment be big axle journal section, the inner cylinder face of nut 15 is machined with arc helicla flute, and each planetary gear 7 passes through a planet wheel spindle
6 assemble with the big axle journal section of nut 15, and the pilot pin section of nut 15 is supported on planetary gear shell by two taper roll bearings 5
Inside body 4, a hollow lead screw 13 is hollow cylindrical revolving meber, and arc is also machined with the external cylindrical surface of hollow lead screw 13
Helicla flute, the arc helicla flute on the external cylindrical surface of hollow lead screw 13 are engaged with the arc helicla flute on the inner cylinder face of nut 15,
A helical duct is formed, multiple spherical balls 14, hollow lead screw 13, nut 15 and spherical ball 14 are equipped with the helical duct
Form ball wire mechanism.When nut 15 is around its own axis rotation, promote ball 14 to be rolled in helical duct, promote air silk
Thick stick 13 moves along its axial direction.
Refering to Fig. 1 and Fig. 2, the rear end of a cylindrical pedal push rod 12 passes through the hollow bulb of hollow lead screw 13, hollow
Groove is provided with vertically on the rear end face of leading screw 13.Described power-assisted push rod 21 is a stepped cylindrical revolving body, power-assisted push rod
21 leading portion is big axle journal section, and big axle journal section line centered on the axis of rotation of power-assisted push rod 21 is provided with a blind cylindrical hole,
Blind hole is built-in with the elastic reaction disk 20 of cylinder, and the height of elastic reaction disk 20 is more than the depth of the blind hole of power-assisted push rod 12,
The back segment of power-assisted push rod 21 is pilot pin section, and pilot pin section line centered on the axis of rotation of power-assisted push rod 21 is provided with a spiral shell
Pit, external screw thread is provided with piston push rod 24, the pilot pin section of power-assisted push rod 21 is threadedly coupled with piston push rod 24, power-assisted push rod
The 21 intersegmental gap of big axle journal coordinates in the groove being arranged on the rear end face of hollow lead screw 13.
Refering to Fig. 5, there are the pedal push rod forward extended out a connecting shaft, pedal push rod connection on the front end face of pedal push rod 12
External screw thread is provided with axle, the rear end of pedal push rod connector 1 is provided with internal thread, and pedal push rod 12 is by pedal push rod connecting shaft with stepping on
Plate push rod connector 1 is threadedly coupled, for transmitting brake force.
Refering to Fig. 5, a PTS includes a PTS main body 31 and one and pedal row
The sliding magnet 33 that journey sensor main body 31 is slidably matched, PTS main body 31 are fixedly connected with vehicle frame, slide magnetic
Iron 33 is fixed between the rear end face of pedal push rod connector 1 and the front end face of pedal push rod 12, and can turn pedal push rod
Connector 1 clamps sliding magnet 33.Sliding magnet 33 can move along its axis with pedal push rod 12 and pedal travel senses
Device main body 31 remains stationary as, you can measures the displacement of both relative shifts, i.e. pedal push rod 12.Described pedal travel passes
Sensor is from the stroke sensor of MTS-RP series, and shell is aluminium shell molds, and intensity is high, meets real vehicle use environment.Differentiate
Rate is 2 μm, and measurement stroke is 25-4975mm, meets real vehicle requirement.
Refering to Fig. 1 and Fig. 2, have on the external cylindrical surface of the front end of pedal push rod 12 annular shape projection, conical first time
Position spring 2 is arranged between the projection of the annular shape and the front end face of drive end bearing bracket 3.The middle part of power-assisted push rod 21 is set with a return
Block 22, described return block 22 are a hollow cylindrical stepped revolving meber, and the leading portion of return block 22 is big axle journal section, back segment
For pilot pin section, return block 22 is sleeved on the pilot pin section of power-assisted push rod 21, and the front end face of the big axle journal section of return block 22 is with helping
Push the rear end face contact of the big axle journal section of bar 21.
Refering to Fig. 1, a master cylinder 23 is fixed on rear end cap 11, and the piston push rod 24 of master cylinder 23 stretches into the leading portion of rear end cap 11
Hollow bulb, piston push rod 24 and the rear end of power-assisted push rod 21 are fixed threaded connection, front end face and the return block 22 of master cylinder 23
Small axle diameter section rear end face between be provided with a second conical return spring 25.
Refering to Fig. 1 and Fig. 6, two inlets of master cylinder 23 are connected with a fluid reservoir 26.One liquid outlet of master cylinder 23
It is connected by fluid pressure line with the inlet of a No.1 two-position two-way solenoid valve 27, another liquid outlet of master cylinder 23 passes through another
One fluid pressure line is connected with the inlet of a tee pipe coupling 34.One liquid outlet of tee pipe coupling 34 passes through hydraulic tube
The inlet connection of Lu Yuyi pressure sensor 32, described pressure sensor 32 are passed from the pressure of KELLER-21Y series
Sensor, range 0-30MPa, linear precision are ± 0.25%FS.Another liquid outlet of tee pipe coupling 34 passes through another
Fluid pressure line is connected with the inlet of No. two two-position two-way solenoid valves 28.The liquid outlet of No.1 two-position two-way solenoid valve 27 leads to
Cross fluid pressure line to be connected with an inlet of a hydraulic control unit 29, the liquid outlet of No. two two-position two-way solenoid valves 28 leads to
Another fluid pressure line is crossed to be connected with another inlet of hydraulic control unit 29.Two two-position two-way solenoid valve models
LD8705H normal-open electromagnetic valves, maximum working pressure 250bar, operating voltage 24VDC.Four of hydraulic control unit 29
Liquid outlet is connected by fluid pressure line with the inlet of four disk brakes 30 on four wheels of vehicle respectively.
Refering to Fig. 1, the signal output part of PTS 31 and pressure sensor 32 passes through data wire and car respectively
The signal input part connection of electronic control unit in, 27, No. two motor, No.1 two-position two-way solenoid valve bi-bit bi-pass electromagnetism
Valve 28 and 29 respective signal receiving end of hydraulic control unit are connected by the output end of data wire and electronic control unit respectively.
A kind of operation principle of integrated electric energy assisted braking system of the present invention：
1. electric boosted function：
Electric boosted function is a most basic work(for a kind of integrated electric energy assisted braking system of the present invention
Energy.As shown in figure 1, when driver's brake pedal, the translation of pedal push rod connector 1, pedal push rod 12 is promoted to move right
Dynamic, now PTS detects the displacement of pedal push rod 12, and displacement signal is sent into ECU, and ECU is by displacement
Amount signal is handled, and draws the power-assisted value that hollow motor now needs according to assist characteristic curve, control command is sent to
Motor, motor operate according to instruction, and the rotor of motor drives sun gear 16, planetary gear 7, planetary gear shaft 6, nut 15, sky
Heart leading screw 13 moves.The translation to the right together with pedal push rod 12 of hollow lead screw 13, promote elastic reaction disk 20, power-assisted push rod 21,
Return block 22, piston push rod 24 move right, so as to establish brake fluid pressure in master cylinder 23.Brake fluid in master cylinder 23 passes through
Brake piping and two two-position two-way solenoid valves flow into hydraulic control unit 29, then flow into disk brake 30 by brake piping
In, establish brake pressure.
Due to a kind of transmission mechanism of integrated electric energy assisted braking system of the present invention be planetary gears with
The combination of ball screw framework, therefore system can obtain larger speed reducing ratio, so as to reduce the performance requirement to motor；
When system carries out continuous braking, because motor can export stable rotating speed and torque, therefore good brake feel can be obtained
Feel；In addition, when anti-lock braking system (ABS) starts, electric booster braking system of the present invention can not only pass through
Regulation hydraulic control unit 29 realizes the regulation to hydraulic coupling, can also be adjusted by the output speed of regulation motor with torque
Section, showed so as to optimize ABS response time and dynamic.
2. regenerative braking capability
For the vehicle equipped with regenerative braking device, when vehicle only needs regenerative braking force caused by regenerative braking device
When completing braking, a kind of ECU of integrated electric energy assisted braking system of the present invention, which sends corresponding control instruction, makes one
Number 27, No. two two-position two-way solenoid valves 28 of two-position two-way solenoid valve are closed, and now the brake fluid in master cylinder 23 will not act on disk
Formula brake 30, i.e. conventional braking mode are not involved in braking operation.
Due between brake pedal and master cylinder 23 by pedal push rod connector 1, pedal push rod 12, elastic reaction disk 20,
Power-assisted push rod 21, piston push rod 24 connect, therefore the brake pressure in master cylinder 23 can be by the above-mentioned parts system of reacting on
Dynamic pedal, form the feedback of brake feel, it is not necessary to special to set pedal sense simulator to carry out simulating brake sensation.In addition, this
A kind of described integrated electric energy assisted braking system of invention can also carry out the tune of pedal sense by the action of regulation motor
Section.
When vehicle needs larger braking deceleration, if system judges to show that regenerative braking force and friction catch are common
When work is to meet requirement of the vehicle to brake force, ECU, which sends control instruction, makes 2 three-way electromagnetic valve 27, No. two 22 of No.1 2 logical
Magnetic valve 28 is opened, and brake fluid pressure is produced in wheel-braking cylinder.Now the brake fluid in master cylinder 23 still can act on disk
Formula brake 30, produce friction brake force.Meanwhile regenerative braking device effect produces regenerative braking force, both collectively form vapour
Car brake force.
3. fail backup functionality
When the motor in a kind of integrated electric energy assisted braking system of the present invention or some driving member are due to event
When hindering and failing, driver's brake pedal, it still can pass through pedal push rod connector 1, pedal push rod 12, elastic reaction
Disk 20, power-assisted push rod 21, piston push rod 24 are applied to master cylinder 23, so as to establish brake fluid pressure in master cylinder 23, meet automobile
Minimum requirements for brake force.
In addition, when two-position two-way solenoid valve fails, still may be at powering off opening, vehicle can still realize braking
The foundation of hydraulic coupling.
4. active brake function
Vehicle for being provided with tachogenerator, distance measuring sensor device, when tachogenerator, distance measuring sensor measure
Learn vehicle with front obstacle apart from too short, it is necessary to take brake measure to prevent collision or during other hazardous acts, ECU
Corresponding control instruction can be sent to motor, rotor 18 is started running, pass through sun gear 16, planetary gear 7, nut
15th, the motion of hollow lead screw 13, elastic reaction disk 20, power-assisted push rod 21, piston push rod 24 establishes brake fluid pressure in master cylinder 23
Power, meanwhile, the brake pressure signal that electronic control unit can be transmitted by reading pressure sensor 32, to hydraulic control unit
29 are adjusted, and the hydraulic coupling of wheel cylinder in each disk brake 30 is adjusted respectively.Realize active brake function.
Claims (8)
1. a kind of integrated electric energy assisted braking system, it is characterised in that including an electric machine casing (9) and a planetary gear
Housing (4), using the direction of operator brake power input as front, pass through one between electric machine casing (9) and planet gear carrier (4)
Middle end cap (8) of the individual centre with manhole is fixed, and planet gear carrier (4) front end is covered by a drive end bearing bracket (3), motor
It is provided with motor in housing (9), motor includes motor stator (19) and rotor (18), after a hollow ladder shaft-like
The leading portion of end cap (11) is pilot pin section, and the back segment of rear end cap (11) is big axle journal section, and the pilot pin section of rear end cap (11) stretches into
Electric machine casing (9) is internal, and electric machine casing (9) rear end is closed by the big axle journal section lid of rear end cap (11), and motor stator (19) is fixed on
Electric machine casing (9) is internal, and a rotor (18) for carrying axis hole is provided with motor stator (19), rotor (18)
Shaft hole sleeve has vertical on the external cylindrical surface of rear end cap (11) pilot pin section on the front end face of the big axle journal section of rear end cap (11)
Fixed in the bearing for having the ring-type perpendicular to the end face on the bearing race snap of the ring-type of the end face, the rear end face of middle end cap (8)
Ring, rotor (18) are supported in the bearing race snap on rear end cap (11) by an angular contact ball bearing (10), motor
Rotor (18) is supported in the bearing race snap on middle end cap (8) by another angular contact ball bearing；Planet gear carrier (4)
There are a set of planetary gearsets inside, planetary gearsets include a gear ring (17) being fixed in planet gear carrier (4), one
It is concentric with gear ring (17) and positioned at gear ring (17) circumferential inner sun gear (16) and four be uniformly arranged on gear ring (17) and
Planetary gear (7) between sun gear (16), each planetary gear (7) while is engaged, sun gear with gear ring (17) and sun gear (16)
(16) rear end face is located in the manhole of middle end cap (9) and fixed by the front end face of screw and rotor (18) and connected
Connect, a nut (15) is hollow stepped revolving meber, and the leading portion of nut (15) is pilot pin section, and the back segment of nut (15) is
Big axle journal section, the inner cylinder face of nut (15) are machined with arc helicla flute, and each planetary gear (7) passes through a planet wheel spindle (6)
Assembled with the big axle journal section of nut (15), the pilot pin section of nut (15) is supported on planet by two taper roll bearings (5)
Gear housing (4) is internal, and a hollow lead screw (13) is hollow cylindrical revolving meber, on the external cylindrical surface of hollow lead screw (13)
Also it is machined with arc helicla flute, the arc helicla flute on hollow lead screw (13) external cylindrical surface and the arc on nut (15) inner cylinder face
Shape helicla flute is engaged to form a helical duct, is equipped with multiple spherical balls (14) in the helical duct, hollow lead screw (13),
Nut (15) and spherical ball (14) composition ball screw framework, the rear end of a cylindrical pedal push rod (12) is through hollow
The hollow bulb of leading screw (13), groove is provided with vertically on hollow lead screw (13) rear end face, one is located at rear end cap (11) hollow bulb
Power-assisted push rod (21) front space coordinate be arranged on hollow lead screw (13) rear end face on groove in, before pedal push rod (12)
End is fixedly connected with the rear end of a pedal push rod connector (1), and the front end of pedal push rod connector (1) is used to connect vehicle
Brake pedal, a PTS includes a PTS main body (31) and one senses with pedal travel
The sliding magnet (33) that device main body (31) is slidably matched, PTS main body (31) are fixedly connected with vehicle frame, slide magnetic
Iron (33) is fixed between the rear end face of pedal push rod connector (1) and pedal push rod (12) front end face, pedal push rod (12)
First return spring (2) is provided between the front end face of front end and drive end bearing bracket (3), one is set with the middle part of power-assisted push rod (21)
Individual return block (22), a master cylinder (23) are fixed on rear end cap (11), and the piston push rod (24) of master cylinder (23) stretches into rear end cap
(11) hollow bulb of leading portion, piston push rod (24) are fixedly connected with power-assisted push rod (21) rear end, and the front end face of master cylinder (23) is with returning
Second return spring (25) is provided between the rear end face of position block (22), master cylinder (23) is fixed on rear end cap (11), main
Two inlets of cylinder (23) are connected with a fluid reservoir (26), and a liquid outlet of master cylinder (23) passes through fluid pressure line and one
The inlet connection of No.1 two-position two-way solenoid valve (27), another liquid outlet of master cylinder (23) pass through fluid pressure line and one three
The inlet connection of connection for bbreather pipe (34), a liquid outlet of tee pipe coupling (34) pass through fluid pressure line and a pressure sensing
The inlet connection of device (32), another liquid outlet of tee pipe coupling (34) pass through fluid pressure line and No. two bi-bit bi-pass
The inlet connection of magnetic valve (28), the liquid outlet of No.1 two-position two-way solenoid valve (27) pass through fluid pressure line and a hydraulic pressure control
The inlet connection of unit (29) processed, the liquid outlet of No. two two-position two-way solenoid valves (28) pass through fluid pressure line and hydraulic pressure control
Another inlet connection of unit (29) processed, four liquid outlets of hydraulic control unit (29) pass through brake hydraulic line respectively
It is connected with the inlet of four disk brakes (30) on four wheels of vehicle, PTS (31) and pressure
The signal output part of force snesor (32) is connected by data wire with the signal input part of the electronic control unit in vehicle respectively,
Motor, No.1 two-position two-way solenoid valve (27), No. two two-position two-way solenoid valves (28) and hydraulic control unit (29) respective letter
Number receiving terminal passes through the output end of data wire and electronic control unit and connected respectively.
A kind of 2. integrated electric energy assisted braking system according to claim 1, it is characterised in that described sun gear
(16) it is hollow step structure, sun gear (16) leading portion is pilot pin section, and back segment is big axle journal section, between leading portion and back segment
Escape is left, the pilot pin section of sun gear (16) is provided with the gear teeth, and big axle journal section is centered on the axis of rotation of sun gear (16)
Line is uniformly provided with four screwed holes, the front end face of rotor (18) position corresponding with four screwed holes on sun gear (16)
Put and be also provided with four screwed holes, the big axle journal section of sun gear (16) is fixed by the front end face of screw and rotor (18) to be connected
Connect.
3. a kind of integrated electric energy assisted braking system according to claim 1, it is characterised in that before pedal push rod (12)
There is the pedal push rod forward extended out a connecting shaft on end face, external screw thread, pedal push rod connection are provided with pedal push rod connecting shaft
Part (1) rear end is provided with internal thread, and pedal push rod (12) is connected by pedal push rod connecting shaft and pedal push rod connector (1) screw thread
Connect, for transmitting brake force.
A kind of 4. integrated electric energy assisted braking system according to claim 3, it is characterised in that described power-assisted push rod
(21) it is a stepped cylindrical revolving body, the leading portion of power-assisted push rod (21) is big axle journal section, and the big axle journal section is with power-assisted push rod
(21) line is provided with a blind cylindrical hole centered on axis of rotation, and the elastic reaction disk (20) of cylinder, bullet are provided with blind hole
Property reaction tray (20) height be more than power-assisted push rod (12) blind hole depth, the back segment of power-assisted push rod (21) is pilot pin section,
Pilot pin section line centered on the axis of rotation of power-assisted push rod (21) is provided with a screwed hole, is provided with piston push rod (24) outer
Screw thread, the pilot pin section of power-assisted push rod (21) are threadedly coupled with piston push rod (24), the intersegmental gap of big axle journal of power-assisted push rod (21)
Coordinate in the groove being arranged on pedal push rod (12) rear end face.
A kind of 5. integrated electric energy assisted braking system according to claim 4, it is characterised in that described return block
(22) it is a hollow cylindrical stepped revolving meber, the leading portion of return block (22) is big axle journal section, and back segment is pilot pin section, is returned
Position block (22) is sleeved on the pilot pin section of power-assisted push rod (21), front end face and the power-assisted push rod of the big axle journal section of return block (22)
(21) the rear end face contact of big axle journal section, the second return spring (25) are arranged on the front end face of the output shaft of master cylinder (23) with returning
Between the rear end face of the pilot pin section of position block (22).
A kind of 6. integrated electric energy assisted braking system according to claim 1, it is characterised in that described motor stator
(19) equally distributed bar-shaped trough is provided with along axis of rotation direction on its external cylindrical surface, determined in electric machine casing (9) with motor
Position corresponding to sub (19) is provided with bar shaped pin, and the bar-shaped trough of motor stator (19) and electric machine casing (9) inner stripe pin interference are matched somebody with somebody
Close, motor stator (19) is fixed in electric machine casing (9), described rotor 18 is provided with projection at middle part, raised
Front side is supported on middle end cap (8) by an angular contact ball bearing (10), and raised rear side passes through another angular contact ball axle
Hold (10) to be supported on right end cap (11), interference fits are installed between rotor (18) and angular contact ball bearing (10), corner connection
Ball bearing (10) is touched to install with middle end cap (8) and right end cap (11) interference fits.
7. a kind of integrated electric energy assisted braking system according to claim 1, it is characterised in that before pedal push rod (12)
There is the projection of annular shape on the external cylindrical surface at end, the first return spring (2) is arranged on the projection and drive end bearing bracket (3) of the annular shape
Between front end face.
A kind of 8. integrated electric energy assisted braking system according to claim 1, it is characterised in that the first described return
Spring (2) and the second return spring (25) are cone shaped spring.
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| CN201711067098.2A CN107757380B (en) | 2017-11-03 | 2017-11-03 | A kind of integrated electric energy assisted braking system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711067098.2A CN107757380B (en) | 2017-11-03 | 2017-11-03 | A kind of integrated electric energy assisted braking system |
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| CN107757380B CN107757380B (en) | 2019-01-18 |
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| CN108394393A (en) * | 2018-05-03 | 2018-08-14 | 吉林大学 | A kind of electric booster braking system of large transmission ratio |
| CN108501913A (en) * | 2018-05-24 | 2018-09-07 | 吉林大学 | A kind of brake pedal travel simulator |
| CN109505527A (en) * | 2019-01-10 | 2019-03-22 | 西南石油大学 | A kind of connector and application method for drilling rod and marine riser abrasionproof |
| CN109532810A (en) * | 2019-01-11 | 2019-03-29 | 瑞立集团瑞安汽车零部件有限公司 | A kind of electronic hydraulic brake system device |
| CN109624957A (en) * | 2019-02-26 | 2019-04-16 | 吉林大学 | A kind of integrated electric energy assisted braking system with novel coupled modes |
| CN117944646A (en) * | 2024-03-26 | 2024-04-30 | 合肥工业大学 | Electronic hydraulic brake with failure backup |
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