CN107757380B - A kind of integrated electric energy assisted braking system - Google Patents
A kind of integrated electric energy assisted braking system Download PDFInfo
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- CN107757380B CN107757380B CN201711067098.2A CN201711067098A CN107757380B CN 107757380 B CN107757380 B CN 107757380B CN 201711067098 A CN201711067098 A CN 201711067098A CN 107757380 B CN107757380 B CN 107757380B
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- push rod
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- rear end
- pedal
- end cap
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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 present invention provides a kind of integrated electric energy assisted braking systems, including motor, planetary gear set, ball screw framework, nut connection in planetary gear and roller screw mechanism in planetary gear set, pedal push rod passes through elastic reaction disk, the output axis connection of power-assisted push rod and master cylinder, there is pedal travel sensor on pedal push rod, master cylinder passes through fluid pressure line, pressure sensor, two two-position two-way solenoid valves are connect with hydraulic control unit, hydraulic control unit is connect by brake piping with four disk brakes on vehicle, pedal travel sensor, two-position two-way solenoid valve, hydraulic control unit, the connection of the electronic control unit of pressure sensor and vehicle；The present invention realizes the effect of deceleration torque increase using motor as power source, using two-stage transmission mechanism, and the rotation of motor output is converted into translation output, and transmission ratio is big, high transmission accuracy, transmission efficiency are high and compact-sized.
Description
Technical field
The invention belongs to the brake device for car fields in Vehicle Engineering, are related to a kind of integrated electric power brake
System.
Background technique
With the fast development of electric car, intelligent automobile, the brake fluid system of traditional vacuum booster formula is
It cannot meet the requirements.Since electric booster braking system eliminates the vacuum booster generallyd use on orthodox car, and can
To realize the decoupling of friction brake force and regenerative braking force, and structure is simple, arrangement is convenient, therefore will become braking system and develop
Inevitable direction.
System shown in patent CN 104709096A uses worm and gear and rack-and-pinion to be used as and subtracts torque increase mechanism, 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, is easy to cause mechanism resistance excessive or even stuck.And the active force of people and motor can not achieve decoupling,
It is easy to cause thrashing.
System shown in patent CN 104118416A, uses the single-stage speed reducing of nuts ball lead screw, and reduction ratio is small, therefore
It is more demanding 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 force excessive.
System shown in patent CN 106240552A uses the two-stage of straight spur gear and nuts ball lead screw to be driven
Mode, but since transmission is more and size is big, so that the axial dimension of whole system is longer, it is unfavorable for vehicle cloth
It sets.
Summary of the invention
The present invention mentions to overcome the defect that transmission scheme of the existing technology is inefficient, transmission ratio is small, structure size is big
A kind of integrated electric energy assisted braking system is supplied.
A kind of integrated electric energy assisted braking system, which is characterized in that including an electric machine casing and a planetary gear
Shell passes through an Intermediate Gray using the direction of operator brake power input as front between electric machine casing and planet gear carrier
There is the middle end cap of circular through hole to fix, planet gear carrier front end is closed by a drive end bearing bracket lid, it is provided with motor in 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 protrudes into inside electric machine casing, electric machine casing rear end by rear end cap big axis
Cervical part of esophagus lid closes, and motor stator is fixed on inside electric machine casing, and the rotor for having axis hole, electricity are provided in 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
Cricoid bearing race snap in the end face has the cricoid bearing race snap perpendicular to the end face on 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 gear set, planet inside planet gear carrier
Gear set includes the 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
It closing, the rear end face of sun gear is located in the circular through hole of middle end cap and is fixedly connected by screw with the front end face of rotor,
One nut is hollow ladder-like 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 inside planet gear carrier by two tapered roller bearings, hollow lead screw is hollow cylinder
Shape revolving meber is also machined with arc helicla flute, the arc spiral on hollow lead screw external cylindrical surface on the external cylindrical surface of hollow lead screw
Slot matches to form a helical duct with the arc helicla flute on nut inner cylinder face, is equipped with multiple spherical shapes in the helical duct
Ball, hollow lead screw, nut and spherical ball form ball screw framework, and the rear end of a cylindrical pedal push rod passes through sky
The hollow portion of heart lead screw is provided with groove along axial direction on hollow lead screw rear end face, and one is located at the power-assisted push rod of rear end cap hollow portion
Front space be fitted in the groove 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 to connect the brake pedal of vehicle, a pedal travel sensor
Including a pedal travel sensor main body and a sliding magnet being slidably matched with pedal travel sensor 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
It is set with a return block, a master cylinder is fixed on rear end cap, and the piston push rod of master cylinder protrudes into the hollow portion of rear end cap leading portion,
Piston push rod is fixedly connected with power-assisted putting back-end, is provided with one second 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 connect with a fluid reservoir, a liquid outlet of master cylinder
It is connect 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
One liquid outlet of the inlet connection of Lu Yuyi tee pipe coupling, tee pipe coupling is passed by fluid pressure line and a pressure
The inlet of sensor connects, another liquid outlet of tee pipe coupling passes 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 by one of fluid pressure line and a hydraulic control unit into
The liquid outlet of the connection of liquid mouth, No. two two-position two-way solenoid valves is connected by another inlet of fluid pressure line and hydraulic control unit
It connects, four disks that four liquid outlets of hydraulic control unit pass through brake hydraulic line respectively and are mounted on four wheels of vehicle
The inlet of formula brake connects, and the signal output end of pedal travel sensor and pressure sensor passes through data line and vehicle respectively
The signal input part of electronic control unit in connects, motor, No.1 two-position two-way solenoid valve, No. two two-position two-way solenoid valves
The output end for passing through data line and electronic control unit respectively with the respective signal receiving end of hydraulic control unit connects.
Further technical solution includes:
The sun gear is hollow step structure, and sun gear leading portion is pilot pin section, and back segment is big axle journal section, preceding
There are escape between section and back segment, the pilot pin section of sun gear is provided with the gear teeth, and big axle journal section is with the axis of rotation of sun gear
Center line is uniformly opened there are four threaded hole, the front end face of rotor position corresponding with four threaded holes on sun gear
It opens there are four threaded hole, 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 connecting shaft forward extended out on pedal push rod front end face, is provided in pedal push rod connecting shaft outer
Screw thread, pedal push rod connector rear end are provided with internal screw thread, and pedal push rod passes through pedal push rod connecting shaft and pedal push rod connector
It is threadedly coupled, for transmitting brake force.
The power-assisted push rod is a ladder-like cylindrical revolving body, and the leading portion of power-assisted push rod is big axle journal section, the big axis
Cervical part of esophagus is provided with a blind cylindrical hole by center line of the axis of rotation of power-assisted push rod, and cylindrical elastic reaction is provided in blind hole
Disk, the height of elastic reaction disk are greater 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 is provided with a threaded hole by center line of the axis of rotation of power-assisted push rod, and external screw thread is provided on piston push rod, power-assisted push rod
Pilot pin section is threadedly coupled with piston push rod, and the big axle journal section clearance fit of power-assisted push rod is mounted on hollow lead screw rear end face
In groove.
The return block is a hollow ladder-like revolving meber of cylinder, 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, the front end face and power-assisted push rod of the big axle journal section of return block
Big axle journal section rear end face contact, the rear end of the front end face of master cylinder and the pilot pin section of return block is arranged in the second return spring
Between face.
The motor stator is provided with equally distributed strip groove, motor casing along axis of rotation direction on its external cylindrical surface
Position corresponding with motor stator is provided with bar shaped pin, the strip groove and electric machine casing inner stripe pin interference of motor stator in vivo
Cooperation, is fixed on motor stator in electric machine casing, the rotor is provided with protrusion at middle part, and raised front side passes through
One angular contact ball bearing is supported on middle-end and covers, and raised rear side is supported on right end cap by another angular contact ball bearing
On, transition fit is installed between rotor and angular contact ball bearing, and angular contact ball bearing is matched with middle end cap and right end cap transition
Close installation.
There is circular protrusion on the external cylindrical surface of pedal push rod front end, the convex of the annular shape is arranged in the first return spring
It rises between the front end face of drive end bearing bracket.
First return spring and the second return spring is cone shaped spring.
Compared with prior art the beneficial effects of the present invention are:
1. integrated electric energy assisted braking system of the present invention is passed using hollow motor as power source with two-stage
Motivation structure realizes the effect of deceleration torque increase, and the rotation of motor output is converted into translation output.First gear stage is row
Star gear mechanism, the second level are ball screw framework, and transmission ratio is big, high transmission accuracy, transmission efficiency are high and compact-sized, significantly
Improve the braking ability of vehicle.
2. electric booster braking system of the invention is not only only capable of improving the braking ability of vehicle, but also can implement actively
The functions such as braking, failure backup and Brake energy recovery, moreover it is possible to be effectively integrated electronic stability program (ESP), adaptive cruise
Active control technologies such as (ACC) are controlled, realize Vehicular intelligentization control.
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, keep structure more compact.
4. electric machine casing of the present invention does pattern handling, master cylinder leading portion is allow to extend into the hollow portion of rear end cap,
Effectively reduce the axial dimension of electric booster braking system.
5. elastic reaction disk of the present invention is placed in the blind hole of power-assisted push rod, wrapped good, prevent because of radial force
It is excessive to lead to security risk caused by reaction tray excessive deformation.
6. integrated electric energy assisted braking system of the present invention has done smaller change on the basis of existing braking system
It is dynamic, facilitate real vehicle to install, it is portable good, and be easy to external equipment and carry out test experiments.
Detailed description of the invention
The present invention will be further described below with reference to the drawings:
Fig. 1 is a kind of structural schematic diagram 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 pedal travel sensor in a kind of integrated electric energy assisted braking system of the present invention is pushed 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 system of the present invention in pressure sensor and tee pipe coupling connection
Schematic diagram.
In figure: 1. pedal push rod connectors, 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, 23. master cylinder, 23,24. piston push rod, 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. pedal travel sensor main bodys, 32. pressure sensors, 33. sliding magnets, 34. tee pipe couplings.
Specific embodiment
Description is made to the present invention with reference to the accompanying drawing:
Refering to fig. 1, a kind of integrated electric energy assisted braking system of the present invention, including one 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, electric machine casing 9 front end face be all evenly distributed the threaded hole there are four same size, planet gear carrier 4
Rear end face, middle end cap 8, electric machine casing 9 front end face pass through bolt and nut connect.4 front end of planet gear carrier is by before one
The lid of end cap 3 closes, and the two is connected by screw to.
Refering to fig. 1, motor is provided in 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 axis of rear end cap 11
Cervical part of esophagus protrudes into inside electric machine casing 9, and 9 rear end of electric machine casing is closed by the big axle journal section lid of rear end cap 11.The motor stator 19
It is provided with equally distributed strip groove 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, and strip groove and 9 inner stripe pin of the electric machine casing interference fit of motor stator 19 make motor stator
19 are fixed in electric machine casing 9.
Refering to fig. 1, the rotor 18 for having axis hole, the shaft hole sleeve of rotor 18 are provided in motor stator 19
On the external cylindrical surface of 11 pilot pin section of rear end cap, have on the front end face of the big axle journal section of rear end cap 11 perpendicular to the end face
Cricoid bearing race snap has the cricoid bearing race snap perpendicular to the end face, rotor 18 on the rear end face of middle end cap 8
It is supported in the bearing race snap on rear end cap 11 by an angular contact ball bearing 10, 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 is a set of planetary gear set inside planet gear carrier 4, planetary gear set includes that a fixation is expert at
Gear ring 17, one in star gear housing 4 are concentric with gear ring 17 and are 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
It closes, four planetary gears 7 not only can be around own axes respectively rotation, but also can revolve around the axis of rotation of sun gear 16.
Refering to fig. 1 and Fig. 3, the sun gear 16 are hollow step structure, and 16 leading portion of sun gear is pilot pin section,
Back segment is big axle journal section, and there are escape between leading portion and back segment, the pilot pin section of sun gear 16 is provided with the gear teeth, big axle journal section with
The axis of rotation of sun gear 16 is that center line is uniformly opened there are four threaded hole, on the front end face and sun gear 16 of rotor 18
The corresponding position of four threaded holes also open there are four threaded hole, 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 ladder-like 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 tapered roller bearings 5
Inside body 4, a hollow lead screw 13 is hollow cylindrical revolving meber, is also machined with arc on the external cylindrical surface of hollow lead screw 13
Helicla flute, the arc helicla flute on 13 external cylindrical surface of hollow lead screw are matched with the arc helicla flute on 15 inner cylinder face of nut,
A helical duct is formed, multiple spherical balls 14, hollow lead screw 13, nut 15 and spherical ball 14 are equipped in the helical duct
Form ball wire mechanism.When nut 15 is around its own axis rotation, ball 14 is pushed to roll in helical duct, pushes air silk
Thick stick 13 is moved 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 portion of hollow lead screw 13, hollow
Groove is provided with along axial direction on 13 rear end face of lead screw.The power-assisted push rod 21 is a ladder-like cylindrical revolving body, power-assisted push rod
21 leading portion is big axle journal section, which is provided with a blind cylindrical hole by center line of the axis of rotation of power-assisted push rod 21,
Blind hole is built-in with cylindrical elastic reaction disk 20, and the height of elastic reaction disk 20 is greater 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, which is provided with a spiral shell by center line of the axis of rotation of power-assisted push rod 21
Pit is provided with external screw thread on piston push rod 24, and the pilot pin section of power-assisted push rod 21 is threadedly coupled with piston push rod 24, power-assisted push rod
21 big axle journal section clearance fit is mounted in the groove on 13 rear end face of hollow lead screw.
Refering to Fig. 5, there are the pedal push rod connecting shaft forward extended out, pedal push rod connection on 12 front end face of pedal push rod
External screw thread is provided on axis, 1 rear end of pedal push rod connector is provided with internal screw thread, and pedal push rod 12 passes through pedal push rod connecting shaft and steps on
Plate push rod connector 1 is threadedly coupled, for transmitting brake force.
Refering to Fig. 5, a pedal travel sensor includes a pedal travel sensor main body 31 and one and pedal row
The sliding magnet 33 that journey sensor main body 31 is slidably matched, pedal travel sensor main body 31 are fixedly connected with vehicle frame, slide magnetic
Iron 33 is fixed between 12 front end face of rear end face and pedal push rod of pedal push rod connector 1, and can turn pedal push rod
Connector 1 clamps sliding magnet 33.Sliding magnet 33 can be moved along its axis with pedal push rod 12 and pedal travel senses
Device main body 31 remains stationary, and can measure the two relative shift, the i.e. displacement of pedal push rod 12.The pedal travel passes
Sensor selects the stroke sensor of MTS-RP series, and shell is aluminium shell molds, and intensity is high, meets real vehicle use environment.It differentiates
Rate is 2 μm, and measurement stroke is 25-4975mm, meets real vehicle requirement.
Refering to fig. 1 and Fig. 2, there is circular protrusion on the external cylindrical surface of 12 front end of pedal push rod, conical first time
Position spring 2 is arranged between the protrusion of the annular shape and the front end face of drive end bearing bracket 3.A return is set in the middle part of power-assisted push rod 21
Block 22, the return block 22 are a hollow ladder-like revolving meber of cylinder, 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, the front end face of the big axle journal section of return block 22 with help
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 protrudes into 11 leading portion of rear end cap
Hollow portion, piston push rod 24 and 21 rear end of power-assisted push rod are fixed threaded connection, the front end face and return block 22 of master cylinder 23
Small axle diameter section rear end face between be provided with a second conical return spring 25.
It is connect refering to fig. 1 with Fig. 6, two inlets of master cylinder 23 with a fluid reservoir 26.One liquid outlet of master cylinder 23
It is connect 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 connect 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, the pressure sensor 32 select the pressure of KELLER-21Y series to pass
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 connect 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 is logical
It crosses fluid pressure line to connect with an inlet of a hydraulic control unit 29, the liquid outlet of No. two two-position two-way solenoid valves 28 is logical
Another fluid pressure line is crossed to connect with another inlet of hydraulic control unit 29.Two two-position two-way solenoid valve models
LD8705H normal-open electromagnetic valve, maximum working pressure 250bar, operating voltage 24VDC.Four of hydraulic control unit 29
Liquid outlet passes through fluid pressure line respectively and connect with the inlet for four disk brakes 30 being mounted on four wheels of vehicle.
Refering to fig. 1, the signal output end of pedal travel sensor and pressure sensor 32 passes through data line and vehicle respectively
In electronic control unit signal input part connection, 27, No. two motor, No.1 two-position two-way solenoid valve two-position two-way solenoid valves
28 and the respective signal receiving end of hydraulic control unit 29 pass through the output end of data line and electronic control unit respectively and connect.
A kind of working principle of integrated electric energy assisted braking system of the present invention:
1. electric boosted function:
Electric boosted function is a most basic function for a kind of integrated electric energy assisted braking system of the present invention
Energy.As shown in Figure 1, pedal push rod connector 1 is translatable when driver's brake pedal, pedal push rod 12 is pushed to move right
Dynamic, pedal travel sensor detects the displacement of pedal push rod 12 at this time, displacement signal is sent to ECU, ECU will be displaced
Amount signal is handled, and obtains the power-assisted value that hollow motor needs at this time according to assist characteristic curve, control command is sent to
Motor, motor are operated according to instruction, and the rotor of motor drives sun gear 16, planetary gear 7, planetary gear shaft 6, nut 15, sky
Heart lead screw 13 moves.Hollow lead screw 13 is translatable to the right together with pedal push rod 12, push elastic reaction disk 20, power-assisted push rod 21,
Return block 22, piston push rod 24 move right, 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, flow into disk brake 30 using 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 gear mechanism with
The combination of ball screw framework, therefore system can obtain biggish reduction ratio, to reduce the performance requirement to motor；?
When system carries out continuous braking, since motor can export stable revolving speed and torque, good brake feel can be obtained
Feel；In addition, electric booster braking system of the present invention can not only pass through when anti-lock braking system (ABS) starting
Adjusting of the realization of hydraulic control unit 29 to hydraulic coupling is adjusted, can also be adjusted by adjusting the output revolving speed of motor with torque
Section, to optimize response time and the dynamic performance of ABS.
2. regenerative braking capability
For being equipped with the vehicle of regenerative braking device, when the regenerative braking force that vehicle only needs regenerative braking device to generate comes
When completing braking, a kind of ECU of integrated electric energy assisted braking system of the present invention, which issues corresponding control instruction, makes one
27, No. two two-position two-way solenoid valves 28 of number two-position two-way solenoid valve are closed, and the brake fluid in master cylinder 23 will not act on disk at this time
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 pass through the above-mentioned parts system of reacting on
Dynamic pedal, forms the feedback of brake feel, does not need pedal sense simulator specially is arranged and carrys out simulating brake and feel.In addition, this
A kind of invention integrated electric energy assisted braking system can also carry out the tune of pedal sense by adjusting the movement of motor
Section.
When vehicle needs biggish braking deceleration, if system judgement show that regenerative braking force and friction catch are common
Work is come when meeting requirement of the vehicle to brake force, ECU, which issues control instruction, keeps 2 three-way electromagnetic valve 27, No. two 22 of No.1 2 logical
Solenoid valve 28 is opened, and brake fluid pressure is generated in wheel-braking cylinder.The brake fluid in master cylinder 23 still can act on disk at this time
Formula brake 30 generates friction brake force.Meanwhile regenerative braking device effect generates regenerative braking force, the two collectively forms vapour
Vehicle brake force.
3. fail backup functionality
When in a kind of integrated electric energy assisted braking system of the present invention motor or some driving member due to therefore
When hindering and failing, driver's brake pedal 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, to establish brake fluid pressure in master cylinder 23, meet automobile
Minimum requirements for brake force.
In addition, still may be at power-off open state when two-position two-way solenoid valve failure, vehicle still may be implemented to brake
The foundation of hydraulic coupling.
4. active brake function
For being equipped with the vehicle of velocity sensor, distance measuring sensor device, when velocity sensor, distance measuring sensor measure
Learn vehicle and front obstacle apart from too short, it is necessary to when brake measure being taken to prevent collision or other hazardous acts, ECU
Corresponding control instruction can be sent to motor, so that rotor 18 is started running, pass through sun gear 16, planetary gear 7, nut
15, the movement 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 adjust respectively to the hydraulic coupling of wheel cylinder in each disk brake 30.Realize active brake function.
Claims (8)
1. a kind of integrated electric energy assisted braking system, which is characterized in that including an electric machine casing (9) and a planetary gear
Shell (4) passes through one using the direction of operator brake power input as front between electric machine casing (9) and planet gear carrier (4)
Middle end cap (8) of a centre with circular through hole is fixed, and planet gear carrier (4) front end is closed by drive end bearing bracket (3) lid, motor
It is provided with motor in shell (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) protrudes 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 the rotor (18) for having axis hole is provided in 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)
Cricoid bearing race snap in the end face has the cricoid bearing perpendicular to the end face to fix on 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 is a set of planetary gear set in inside, and planetary gear set includes a gear ring (17) being fixed in planet gear carrier (4), one
It is concentric with gear ring (17) and be located at gear ring (17) circumferential inners sun gear (16) and four be uniformly arranged on gear ring (17) and
Planetary gear (7) between sun gear (16), each planetary gear (7) are engaged with gear ring (17) and sun gear (16) simultaneously, sun gear
(16) rear end face is located in the circular through hole of middle end cap (9) and connects by the way that screw and the front end face of rotor (18) are fixed
It connects, a nut (15) is hollow ladder-like 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)
It is assembled with the big axle journal section of nut (15), the pilot pin section of nut (15) is supported on planet by two tapered roller 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 matches to form a helical duct, is equipped in the helical duct multiple spherical balls (14), hollow lead screw (13),
Nut (15) and spherical ball (14) form ball screw framework, and the rear end of a cylindrical pedal push rod (12) passes through hollow
The hollow portion of lead screw (13) is provided with groove along axial direction on hollow lead screw (13) rear end face, and one is located at rear end cap (11) hollow portion
The front space of power-assisted push rod (21) be fitted in the groove on hollow lead screw (13) rear end face, 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 for connecting vehicle
Brake pedal, a pedal travel sensor include that a pedal travel sensor main body (31) and one sense with pedal travel
The sliding magnet (33) that device main body (31) is slidably matched, pedal travel sensor 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)
It is provided with first return spring (2) between front end and the front end face of drive end bearing bracket (3), is set with one in the middle part of power-assisted push rod (21)
A return block (22), a master cylinder (23) are fixed on rear end cap (11), and the piston push rod (24) of master cylinder (23) protrudes into rear end cap
(11) hollow portion of leading portion, piston push rod (24) are fixedly connected with power-assisted push rod (21) rear end, the front end face of master cylinder (23) with return
It is provided with second return spring (25) 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 connect with a fluid reservoir (26), and a liquid outlet of master cylinder (23) passes through fluid pressure line and one
The inlet of No.1 two-position two-way solenoid valve (27) connects, another liquid outlet of master cylinder (23) passes through fluid pressure line and one three
The inlet of connection for bbreather pipe (34) connects, and a liquid outlet of tee pipe coupling (34) passes through fluid pressure line and a pressure sensing
The inlet of device (32) connects, another liquid outlet of tee pipe coupling (34) passes through fluid pressure line and No. two bi-bit bi-pass
The inlet of solenoid valve (28) connects, and the liquid outlet of No.1 two-position two-way solenoid valve (27) passes through fluid pressure line and a hydraulic control
One inlet of unit (29) processed connects, and the liquid outlet of No. two two-position two-way solenoid valves (28) passes through fluid pressure line and hydraulic control
Another inlet of unit (29) processed connects, and four liquid outlets of hydraulic control unit (29) pass through brake hydraulic line respectively
It is connect with the inlet for four disk brakes (30) being mounted on four wheels of vehicle, pedal travel sensor and pressure pass
The signal output end of sensor (32) passes through data line respectively and connect with the signal input part of the electronic control unit in vehicle, electricity
Machine, No.1 two-position two-way solenoid valve (27), No. two two-position two-way solenoid valves (28) and hydraulic control unit (29) respective signal
Receiving end passes through data line respectively and the output end of electronic control unit connects.
2. a kind of integrated electric energy assisted braking system according to claim 1, which is characterized in that the sun gear
It (16) 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
There are escape, 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 opened there are four threaded hole, the front end face of rotor (18) position corresponding with four threaded holes on sun gear (16)
It sets and also opens there are four threaded hole, the big axle journal section of sun gear (16) connects by the way that screw and the front end face of rotor (18) are fixed
It connects.
3. a kind of integrated electric energy assisted braking system according to claim 1, which is characterized in that before pedal push rod (12)
There is the pedal push rod connecting shaft forward extended out on end face, external screw thread, pedal push rod connection are provided in pedal push rod connecting shaft
Part (1) rear end is provided with internal screw thread, and pedal push rod (12) is connected by pedal push rod connecting shaft and pedal push rod connector (1) screw thread
It connects, for transmitting brake force.
4. a kind of integrated electric energy assisted braking system according to claim 3, which is characterized in that the power-assisted push rod
It (21) is a ladder-like 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) axis of rotation is that center line is provided with a blind cylindrical hole, and cylindrical elastic reaction disk (20), bullet are provided in blind hole
Property reaction tray (20) height be greater than power-assisted push rod (12) blind hole depth, the back segment of power-assisted push rod (21) is pilot pin section,
The pilot pin section is provided with a threaded hole by center line of the axis of rotation of power-assisted push rod (21), is provided on piston push rod (24) outer
The pilot pin section of screw thread, power-assisted push rod (21) is threadedly coupled with piston push rod (24), the big axle journal section gap of power-assisted push rod (21)
It is fitted in the groove on pedal push rod (12) rear end face.
5. a kind of integrated electric energy assisted braking system according to claim 4, which is characterized in that the return block
It (22) is a hollow ladder-like revolving meber of cylinder, 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), the front end face and 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) be arranged master cylinder (23) output shaft front end face with return
Between the rear end face of the pilot pin section of position block (22).
6. a kind of integrated electric energy assisted braking system according to claim 1, which is characterized in that the motor stator
(19) it is provided with equally distributed strip groove along axis of rotation direction on its external cylindrical surface, determined in electric machine casing (9) with motor
Sub (19) corresponding position is provided with bar shaped pin, and the strip groove of motor stator (19) and electric machine casing (9) inner stripe pin interference are matched
It closes, is fixed on motor stator (19) in electric machine casing (9), the rotor 18 is provided with protrusion 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 axis
It holds (10) to be supported on right end cap (11), transition fit is installed between rotor (18) and angular contact ball bearing (10), corner connection
It touches ball bearing (10) and middle end cap (8) and right end cap (11) transition fit is installed.
7. a kind of integrated electric energy assisted braking system according to claim 1, which is characterized in that before pedal push rod (12)
There is circular protrusion on the external cylindrical surface at end, protrusion and drive end bearing bracket (3) of the annular shape are arranged in the first return spring (2)
Between front end face.
8. a kind of integrated electric energy assisted braking system according to claim 1, which is characterized in that first return
Spring (2) and the second return spring (25) are cone shaped spring.
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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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| 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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| CN107757380A CN107757380A (en) | 2018-03-06 |
| CN107757380B true CN107757380B (en) | 2019-01-18 |
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| CN201711067098.2A Active CN107757380B (en) | 2017-11-03 | 2017-11-03 | A kind of integrated electric energy assisted braking system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN109505527B (en) * | 2019-01-10 | 2023-07-14 | 西南石油大学 | Joint for abrasion prevention of drill rod and water isolation pipe and use method |
| CN109532810B (en) * | 2019-01-11 | 2024-03-15 | 温州瑞立汽车科技有限公司 | Electronic hydraulic braking system device |
| CN109624957B (en) * | 2019-02-26 | 2021-03-09 | 吉林大学 | Integrated electric power-assisted brake system with novel coupling mode |
| CN117944646A (en) * | 2024-03-26 | 2024-04-30 | 合肥工业大学 | Electronic hydraulic brake with failure backup |
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