CN107435699A - A kind of floating caliper type disc brake-by-wire device and control method - Google Patents
A kind of floating caliper type disc brake-by-wire device and control method Download PDFInfo
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- CN107435699A CN107435699A CN201710536656.9A CN201710536656A CN107435699A CN 107435699 A CN107435699 A CN 107435699A CN 201710536656 A CN201710536656 A CN 201710536656A CN 107435699 A CN107435699 A CN 107435699A
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- Prior art keywords
- braking
- piston
- way clutch
- brake
- nut
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
- F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
- F16D65/567—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting on a disc brake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/24—Electric or magnetic using motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
- F16D2125/40—Screw-and-nut
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2127/00—Auxiliary mechanisms
- F16D2127/06—Locking mechanisms, e.g. acting on actuators, on release mechanisms or on force transmission mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to a kind of floating caliper type disc brake-by-wire device and control method, including motor, transmission mechanism, one-way clutch, nut, screw rod, piston, friction stopping means etc..Motor drives the outer ring of one-way clutch to rotate by transmission mechanism, one-way clutch drives nut rotation, drive piston and braking clamp body to move in the opposite direction respectively by thread transmission, friction plate is compressed from brake disc both sides with identical power, realizes efficient braking effect.Simple in construction, reliable operation of the invention, retardation efficiency is high, can automatically adjust brake clearance, and compensates due to influence, the design of simplified control system, available for service brake and parking braking caused by friction disc wear.
Description
Technical field
The present invention relates to brake field, existing floating caliper type disc liquid braking device can be specifically replaced, with automatically controlled machine
The mode of tool realizes that friction plate clamps brake disc from both sides with identical pressure, while can realize that brake clearance is adjustable, brakes
The adjustable line traffic control mechanical brake of intensity, refers in particular to a kind of floating caliper type disc brake-by-wire device and control method.
Background technology
Brake-by-wire technology is a kind of new braking technology occurred in recent years, between brake and brake pedal not
By machinery or fluid power connection, the information controlled motor that sensor is received by control system works, realized for automobile
Reliable and stable control for brake.Mainly there are electro-hydraulic formula brakes (EHB) and mechanical type brake system electric at present
(EMB) two kinds.Line control brake system is advantageous to the optimization of braking performance of vehicle, can be easily other with ABS, ASR, ESP etc.
Electronic control system combines, therefore has wide development space.
Electro-hydraulic formula brakes (EHB) is transformed by traditional brake fluid system, and braking procedure is rapider,
It is stable, the braking safety and comfortableness of automobile are improved, but due to remaining hydraulic unit, do not possess complete brake-by-wire system
The all advantages of system, it is often viewed as a kind of product in advance of mechanical type brake system electric (EMB).
Mechanical type brake system electric (EMB) realizes braking procedure by motor drive machinery mechanism, enormously simplify system
The structure of dynamic system, makes brake more easily arrange, assemble and overhauls.But existing mechanical type brake system electric due to
Part brake often lacks the function that brake clearance automatically adjusts, and makes brake in outside environmental change and friction disc wear
In the case of the problem of causing brake actuator efficiency change indefinite, so as to bring certain difficulty to brake efficiency control.Together
When, the problems such as structure is more complicated, and installation dimension is larger be present in most of brake.
The content of the invention
It is an object of the invention to propose a kind of floating caliper type disc brake-by-wire device and control method.The present invention has structure letter
Singly, the advantages that reliable operation, automatically adjusting for brake clearance can be realized, by detecting the displacement of friction plate drive mechanism or turning
Angle, you can conversion draws braking clamping force size, so that control system is able to corresponding simplification.
Realize that the technical scheme of the object of the invention is as follows：
It is living comprising motor, transmission mechanism, one-way clutch, nut, screw rod provided with a kind of floating caliper type disc brake-by-wire device
Plug, rub stopping means, piston positioning means, braking clamp body, brake disc, friction plate；Described nut support is in described system
On moving caliper, described nut is in the axial direction without relative motion between described braking clamp body；Described friction plate has
Two panels, described brake disc both sides are arranged symmetrically in, one is arranged on described piston, and one is arranged on described caliper
On body；Described piston is arranged on described braking clamp body via described friction stopping means, described piston positioning dress
Putting makes piston to be moved back and forth in axis direction, can not rotate；Described piston is fixedly connected with described screw rod, described
Screw rod coordinates with described nut；Inner ring of the outer surface of described nut as described one-way clutch, described is unidirectional
The outer ring of clutch is fixedly connected with the final element of described transmission mechanism；The final element motion of described transmission mechanism,
Described one-way clutch outer ring rotation is driven, one-way clutch combines, and when driving described nut rotation, passes through described spiral shell
Bar promotes described piston movement, and described braking clamp body and described nut move to the direction opposite with described piston,
Drive the brake disc described in described friction plate from two side compressions；The input member of transmission mechanism described in described motor connection
Part；A described friction stopping means part is fixedly mounted on described braking clamp body, outside another part and described piston
There is larger frictional force between surface, when having relative displacement between described piston and described braking clamp body, due to frictional force
Effect makes to produce elastic potential energy in described friction stopping means；
During braking, described motor drives described one-way clutch outer ring to move via described transmission mechanism, unidirectionally
Clutch is combined, and drives described nut rotation, and described piston and described braking clamp body point are driven by described screw rod
Do not move in the opposite direction, described friction plate is pressed on described brake disc both sides, obtain the braking effect of high efficient and reliable
Fruit, now, there is relative displacement between described piston and described braking clamp body, bullet is produced in described friction stopping means
Property potential energy；When releasing braking, described motor drives described one-way clutch outer ring reverse via described transmission mechanism
Motion, one-way clutch separation, the elastic potential energy effect inside described friction stopping means, make described piston and described
Braking clamp body relative motion, recovers initial position, and now described nut is rotated to adapt to described piston and described braking
The relative motion of caliper；
After described friction plate has abrasion, thickness thinning, during braking operation, described motor is via described driver
The described one-way clutch of structure driving combines, and drives described nut rotation, makes described piston and described caliper body phase
To movement, elastic potential energy reaches maximum in described friction stopping means, and because friction plate is thinning, braking effect is bad, now
Described motor works on, and drives described nut to be rotated further, and overcomes the outer surface of described piston and described friction
Frictional force between stopping means, make described piston and described braking clamp body continue to relatively move, compress brake disc, obtain
Reliable efficient braking effect；When releasing braking, the elastic potential energy effect in described friction stopping means, make described piston
With described braking clamp body relative motion, now described piston and described friction stopping means are relative with new contact position
It is fixed, realize the adjust automatically of brake clearance.
It is additionally included between described nut and described screw rod using circulation spherical structure, to reduce frictional resistance, improves
System operating efficiency.
Being additionally included between described one-way clutch and described nut increases transmission system.
Also include the inner ring that the final element of described transmission mechanism is connected to described one-way clutch, described nut
The outer ring of the described one-way clutch of connection, during braking operation, described one-way clutch combines, described when releasing braking
One-way clutch separates.
When the transmission link for being zero without reverse efficiency in described transmission mechanism or described transmission system, using locking machine
Structure realizes the parking braking under described motor powering-off state, and described lockable mechanism uses electromagnetic brake or electric-controlled mechanical system
Dynamic device, actuated element that can be when being powered when release, power-off in fixed conveyor link, keep described friction plate and described
Brake disc between pressure size, realize parking braking function；Set when in described transmission mechanism or described transmission system
When having the transmission link that reverse efficiency is zero, parking braking can be realized using described lockable mechanism, reverse efficiency can also be utilized
Be zero, power and motion can not back transfer, realize the parking braking under described motor powering-off state.
A kind of floating caliper type disc brake-by-wire device control method, it is characterised in that comprise the steps of：During braking operation, institute
Transmission mechanism work described in the motor driven stated, described one-way clutch combine, and drive described nut rotation, drive institute
The piston stated and the movement of described braking clamp body, described friction plate is set to compress described brake disc both sides, ECU detection
The rotation information of described nut, with reference to the size of current of described motor, calculate braking clamping force；When described friction plate is ground
During damage, the described motor of ECU control rotates influence caused by compensate abrasion.
Brief description of the drawings
Fig. 1 is a kind of front view of the embodiment one of floating caliper type disc brake-by-wire device of the present invention.
Fig. 2 is a kind of A direction views of the embodiment one of floating caliper type disc brake-by-wire device of the present invention.
Fig. 3 is a kind of front view of the embodiment two of floating caliper type disc brake-by-wire device of the present invention.
Fig. 4 is a kind of front view of the embodiment three of floating caliper type disc brake-by-wire device of the present invention.
Explanation is marked in accompanying drawing：1- brake-caliper support 2- guide finger 3- braking clamp body 4- target disc 5- nut 6- worm gears
7- one-way clutch 8- worm screw 9- sealing ring 10- dive key 11- piston 12- friction plate 13- brake disc 14- motors
15- sensor 16- cylindrical roller 17- spring 18- snap ring 19- motor shaft 20- electromagnetic brake 21- primary drive gears
The level driven gear 25- magnet coil 26- return springs of level driving gear 24- times of 22- primary driven gear 23- times 27- locks
Shotpin 28- taper roll bearing 29- screw rods
Embodiment
Refer to the attached drawing 1 and accompanying drawing 2, one embodiment of the present of invention is described in detail.
As depicted in figs. 1 and 2, a kind of floating caliper type disc brake-by-wire device can move comprising one on guide finger (2)
Braking clamp body (3), guide finger (2) are fixed on brake-caliper support (1).There is brake disc (13) in the jaw of braking clamp body (3), make
There is friction plate (12) both sides of Moving plate (13), and one is mounted on braking clamp body (3), and one is mounted on piston (11), piston (11)
By dive key (10) and sealing ring (9) on braking clamp body (3), dive key (10) makes piston (11) can only be along axis
Move in direction, it is impossible to rotate, have larger frictional force between the contact surface of sealing ring (9) and piston (11), when the position of piston (11)
When moving in the regime of elastic deformation of sealing ring (9), without relative motion between the contact surface of sealing ring (9) and piston (11).Nut
(5) it is supported on by taper roll bearing (28) on braking clamp body (3).One end installation friction plate (12) of piston (11), it is another
Screw rod (29) is fixedly mounted in end, and screw rod (29) coordinates with nut (5).The outer surface of nut (5) is interior as one-way clutch (7)
Circle, the outer ring of one-way clutch (7) are fixedly connected with the worm gear (6) in Worm and worm-wheel gearing, worm screw (8) and motor (14)
Output shaft be connected.
During braking operation, motor (14) drives worm screw (8) to rotate, and drives worm gear (6) underdrive, now one-way clutch
(7) combine, drive nut (5) to rotate, because piston (11) can not rotate, the screw rod (29) that is fixedly connected with piston (11) also without
Method rotates, therefore when one-way clutch (7) combines and drives nut (5) rotation, and piston (11) and braking clamp body (3) are to opposite
Direction is moved, and friction plate (12) forces the system for brake disc (13), realizing high efficient and reliable from both sides with identical corresponding to drive
Dynamic effect.Now, between the contact surface of sealing ring (9) generation elastic deformation, storage elastic potential energy, sealing ring (9) and piston (11)
Without relative motion.When releasing braking operation, motor (14) drives worm screw (8) to rotate backward, and driving worm gear (6) also rotates backward,
Now, one-way clutch (7) separates, and nut (5) is in free state, the elastic potential energy release of sealing ring (9) storage, makes piston
(11) reversely rotated with braking clamp body (3) relative motion, drive nut (5) under the elastic potential energy effect in sealing ring (9), institute
There is element to recover initial position.
When friction plate (12) wears, after thickness is thinning, during braking operation, motor (14) passes through worm screw (8), worm gear (6) band
Dynamic one-way clutch (7) combines, and drive nut (5) rotates, and promotes piston (11) and braking clamp body (3) relative motion, sealing ring
(9) when elastic deformation amount reaches maximum, because friction plate (12) wears, braking effect is bad, and now motor (14) continues to lead to
One-way clutch (7) drive nut (5) combined to be crossed to rotate, i.e., piston (11) and braking clamp body (3) continue relative motion, because
This, sealing ring (9) keeps maximum flexibility deflection, and piston (11) overcomes the frictional force between sealing ring (9), is connect with new
Contacting surface is engaged with sealing ring (9), i.e., piston (11) is more than the maximum bullet of sealing ring (9) relative to the displacement of braking clamp body (3)
Property deflection.When releasing braking, motor (14) drives worm-and-wheel gear reversion, one-way clutch (7) separation, sealing ring (9)
Elastic potential energy release, make piston (11) and braking clamp body (3) relative motion, drive nut (5) to rotate, now sealing ring (9)
Positioning is coordinated with new contact surface with piston (11), return displacement is still the maximum flexibility deflection of sealing ring (9), therefore
It is identical with before abrasion to maintain brake clearance, realizes the adjust automatically of brake clearance.
, can be after motor (14) be powered and reaches parking braking effect when the reverse efficiency of worm screw (8) and worm gear (6) is zero
Power-off, the parking braking under motor (14) powering-off state is realized using the auto-lock function of worm-and-wheel gear.
Refer to the attached drawing 3, an alternative embodiment of the invention is described.
The embodiment of accompanying drawing 3 and the embodiment main distinction of accompanying drawing 1 are as follows：
Transmission mechanism is different, is driven in accompanying drawing 1 using worm-and-wheel gear, and worm gear (6) is the final element of transmission mechanism,
One-way clutch (7) is arranged between worm gear (6) and nut (5)；Two-stage gear drive, secondary driven gear are used in accompanying drawing 3
(24) it is the final element of transmission mechanism, one-way clutch (7) is arranged between secondary driven gear (24) and nut (5).
The stopping means that rubs is different, realizes friction limit function using sealing ring (9) in accompanying drawing 1, utilizes sealing ring (9)
Elastic deformation stores elastic potential energy；Friction limit function is realized using spring (17) and snap ring (18) in accompanying drawing 3, utilizes spring
(17) elastic deformation storage elastic potential energy is produced.
Piston positioning means are different, piston (11) is axially moveable using dive key (10) in accompanying drawing 1, can not
Rotate；Piston (11) is axially moveable using cylindrical roller (16) in accompanying drawing 3, can not rotate.
The mode that parking braking function is realized is different, and in accompanying drawing 1, the reverse efficiency using worm-and-wheel gear is zero, directly
The parking braking under motor (14) powering-off state can be realized；In accompanying drawing 3, motor is discharged when being powered using electromagnetic brake (20)
Axle (19), locking motor shaft (19) realizes the parking braking under motor (14) powering-off state during power-off.
As shown in figure 3, a kind of floating caliper type disc brake-by-wire device includes a caliper that can be moved on guide finger (2)
Body (3), guide finger (2) are fixed on brake-caliper support (1).There are brake disc (13), brake disc in the jaw of braking clamp body (3)
(13) there is friction plate (12) both sides, and one is mounted on braking clamp body (3), and one is mounted on piston (11), and piston (11) passes through
On braking clamp body (3), snap ring (18) is pushed to away from brake disc (13) by spring (17) for cylindrical roller (16) and snap ring (18)
Side, spring (17) be arranged on braking clamp body (3) on.Cylindrical roller (16) makes piston (11) to move in the axial direction,
It can not rotate, have larger frictional force between the contact surface of snap ring (18) and piston (11), when the displacement of piston (11) is in spring
(17) when in regime of elastic deformation, without relative motion between the contact surface of snap ring (18) and piston (11).Nut (5) passes through circular cone
Roller bearing (28) is supported on braking clamp body (3).Spiral shell is fixedly mounted in one end installation friction plate (12) of piston (11), the other end
Bar (29), screw rod (29) coordinate with nut (5).Inner ring of the outer surface of nut (5) as one-way clutch (7), one-way clutch
The outer ring of device (7) is fixedly connected with secondary driven gear (24), secondary driven gear (24), secondary driving gear (23), primary
Driven gear (22) forms two-stage gear reduction, primary drive gear (21) and motor (14) with primary drive gear (21)
Motor shaft (19) be fixedly connected.
During braking operation, motor (14) drives one-way clutch (7) to combine by two-stage gear reduction, drives nut
(5) rotate, promote piston (11) and braking clamp body (3) to move in the opposite direction, friction plate corresponding to drive (12) is from both sides
The braking effect for brake disc (13), realizing high efficient and reliable is forced with identical.Now, snap ring (18) and piston (11) move together
Dynamic, elastic deformation occurs for compression spring (17), spring (17), stores the contact surface of elastic potential energy, snap ring (18) and piston (11)
Between without relative motion.Release braking operation when, motor (14) drive two-stage gear reduction rotate backward, now, unidirectionally from
Clutch (7) separates, and nut (5) is in free state, the elastic potential energy release of spring (17) storage, makes piston (11) and caliper
Body (3) relative motion, drive and reversely rotated under elastic potential energy effect of the nut (5) in spring (17), all elements recover just
Beginning position.
When friction plate (12) wears, after thickness is thinning, during braking operation, motor (14) passes through two-stage gear reduction band
Dynamic one-way clutch (7) combines, and drive nut (5) rotates, and promotes piston (11) and braking clamp body (3) relative motion, spring
(17) elastic deformation amount reaches maximum, and snap ring (18) is close to when on the step surface of left side, because friction plate (12) wears, braking
It is ineffective, now motor (14) continue through combination one-way clutch (7) drive nut (5) rotate, i.e., piston (11) and
Braking clamp body (3) continues relative motion, and therefore, spring (17) keeps maximum flexibility deflection, and piston (11) overcomes and snap ring
(18) frictional force between, it is engaged with new contact surface with snap ring (18).When releasing braking, motor (14) drives two-stage gear
Reducing gear inverts, one-way clutch (7) separation, the elastic potential energy release of spring (17), makes piston (11) and braking clamp body (3)
Relative motion, nut (5) rotation is driven, now snap ring (18) and piston (11) coordinate positioning, return displacement with new contact surface
Amount is still the maximum flexibility deflection of spring (17), thus maintain brake clearance and abrasion before it is identical, realize brake cabin
The adjust automatically of gap.
When needing parking braking, make motor (14) drive friction plate (12) to compress brake disc (13), reach parking braking
It is required that then electromagnetic brake (20) powers off, locking motor shaft (19), keep brake efficiency constant, motor now can be achieved
(14) parking braking function under powering-off state.When electromagnetic brake (20) is powered, motor shaft (19) is discharged, now braking moment
Big I is freely controlled by motor (14).
In the embodiment of accompanying drawing 3, one-way clutch (7) can also be arranged in primary drive gear (21), or it is primary from
In moving gear (22), or in secondary driving gear (23), content to be protected as needed for claim 3.
The third embodiment shown in accompanying drawing 4 and second of embodiment shown in accompanying drawing 3 are essentially identical, and difference is：It is attached
Electromagnetic brake (20) is used to realize the parking braking function under motor (14) powering-off state in Fig. 3；Automatically controlled machine is used in accompanying drawing 4
Tool brake apparatus realizes the parking braking function under motor (14) powering-off state, and specific work process is as follows：
When magnet coil (25) is powered, lock pin (27) compression retracteding position spring (26), is made lock pin by electromagnetic force
(27) it is not in contact with each other with secondary driven gear (24), braking or the no any influence of release on brake；When the parking system of needs
When dynamic, motor (14) driving friction plate (12) compresses brake disc (13), reaches parking braking requirement, and then magnet coil (25) is disconnected
Electricity, lock pin (27) in the tooth of the secondary driven gear (24) of insertion, keep parking system under the elastic force effect of return spring (26)
Dynamic effect, you can realize the parking braking function under motor (14) powering-off state.
The structure of the third embodiment other parts shown in accompanying drawing 4 and the course of work all with the embodiment phase in accompanying drawing 3
Together, it is not further described.
Refer to the attached drawing 1 and accompanying drawing 2, a kind of embodiment of floating caliper type disc brake-by-wire device control method in the present invention is carried out
Description.
As shown in figure 1, a kind of floating caliper type disc brake-by-wire device control method includes the disc brake with floating caliper of the present invention, target
Disk (4), sensor (15), ECU (not shown).Target disc (4) is fixedly mounted on the outer surface of nut (5), sensing
Device (15) is arranged on braking clamp body (3), installation corresponding with target disc (4), for detecting the motion state of target disc (4).Brake work
When making, motor (14) drives nut (5) to rotate, and target disc (4) rotates with nut (5), and sensor (15) receives target disc (4)
Rotation information, and be delivered to ECU, the size of current of ECU combination motor (14), the folder of brake can be calculated
Clamp force size, and severity of braking is adjusted.
Transmission mechanism can also use Chain conveyer, V belt translation, planetary gear in addition to using turbine and worm mechanism, gear mechanism
Other kinds of drive such as transmission, friction stopping means can also be obtained in addition to using sealing ring, spring/snap ring using other structures
To realize similar function, piston positioning means can also use spline, pin, piston in addition to using dive key, cylindrical roller
Outer surface is not rounded to wait various ways, and lockable mechanism can also act on lock pin special on other gears or with gear one
On latch ratchet, or the modes such as ratchet and pawl arrangement are installed on motor shaft and realize latch functions.Obviously, described embodiment
Only part of the embodiment of the invention, rather than whole embodiments, based on the embodiment in the present invention, in the art
Other all embodiments that those of ordinary skill is obtained on the premise of no progress creative work, belong to the present invention's
Protection domain.
The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as employ the inventive concept and technical scheme of the present invention progress various improvement, or it is not improved directly application
In other occasions, within protection scope of the present invention.
Claims (6)
1. a kind of floating caliper type disc brake-by-wire device, include motor, transmission mechanism, one-way clutch, nut, screw rod, piston, friction
Stopping means, piston positioning means, braking clamp body, brake disc, friction plate；Described nut support is in described braking clamp body
On, described nut is in the axial direction without relative motion between described braking clamp body；Described friction plate has two panels, right
Claim to be arranged in described brake disc both sides, one is arranged on described piston, and one is arranged on described braking clamp body；Institute
The piston stated is arranged on described braking clamp body via described friction stopping means, and described piston positioning means make piston
It can only move back and forth, can not rotate in axis direction；Described piston is fixedly connected with described screw rod, described screw rod and institute
The nut stated coordinates；Inner ring of the outer surface of described nut as described one-way clutch, described one-way clutch
Outer ring is fixedly connected with the final element of described transmission mechanism；The final element of described transmission mechanism moves, described in drive
The rotation of one-way clutch outer ring, one-way clutch combines, and when driving the described nut to rotate, passes through described screw rod and promotes institute
The piston movement stated, described braking clamp body and described nut move to the direction opposite with described piston, described in drive
Friction plate from two side compressions described in brake disc；The input element of transmission mechanism described in described motor connection；Described
A friction stopping means part is fixedly mounted on described braking clamp body, have between another part and described outer surface of piston compared with
Big frictional force, when having relative displacement between described piston and described braking clamp body, described in frictional force effect makes
Friction stopping means in produce elastic potential energy；
During braking, described motor drives described one-way clutch outer ring to move via described transmission mechanism, one-way clutch
Device combines, and drives described nut rotation, by described screw rod drive described piston and described braking clamp body respectively to
Opposite direction motion, makes described friction plate be pressed on described brake disc both sides, obtains the braking effect of high efficient and reliable, this
When, there is relative displacement between described piston and described braking clamp body, elastic potential is produced in described friction stopping means
Energy；When releasing braking, described motor drives described one-way clutch outer ring counter motion via described transmission mechanism,
One-way clutch separates, and the elastic potential energy effect inside described friction stopping means, makes described piston and described braking
Caliper relative motion, recovers initial position, and now described nut is rotated to adapt to described piston and described braking clamp body
Relative motion；
After described friction plate has abrasion, thickness thinning, during braking operation, described motor drives via described transmission mechanism
Move described one-way clutch to combine, drive described nut rotation, make described piston and the relative shifting of described braking clamp body
Dynamic, elastic potential energy reaches maximum in described friction stopping means, and because friction plate is thinning, braking effect is bad, now described
Motor work on, drive described nut to be rotated further, overcome the outer surface of described piston and described friction spacing
Frictional force between device, make described piston and described braking clamp body continue to relatively move, compress brake disc, obtain reliable
Efficient braking effect；When releasing braking, the elastic potential energy effect in described friction stopping means, make described piston and institute
The braking clamp body relative motion stated, now described piston and described friction stopping means are relative solid with new contact position
It is fixed, realize the adjust automatically of brake clearance.
2. a kind of floating caliper type disc brake-by-wire device according to claim 1, it is characterised in that be additionally included in described nut
Using circulation spherical structure between described screw rod, to reduce frictional resistance, system operating efficiency is improved.
3. a kind of floating caliper type disc brake-by-wire device according to claim 1, it is characterised in that unidirectional described in being additionally included in
Increase transmission system between clutch and described nut.
4. a kind of floating caliper type disc brake-by-wire device according to claim 1, it is characterised in that also include described transmission
The inner ring of one-way clutch described in the final element connection of mechanism, described nut connect the outer of described one-way clutch
Circle, during braking operation, described one-way clutch combines, when releasing braking, the separation of described one-way clutch.
5. a kind of floating caliper type disc brake-by-wire device according to claim 1 or claim 3, it is characterised in that when described
During the transmission link for being zero without reverse efficiency in transmission mechanism or described transmission system, described motor is realized using lockable mechanism
Parking braking under powering-off state, described lockable mechanism use electromagnetic brake or electric-controlled mechanical brake apparatus, can be logical
Actuated element when discharging, powering off when electric in fixed conveyor link, keeps pressure between described friction plate and described brake disc
Size, realize parking braking function；It is zero when being provided with reverse efficiency in described transmission mechanism or described transmission system
During transmission link, parking braking can be realized using described lockable mechanism, can also be zero using reverse efficiency, power and motion
Can not back transfer, realize the parking braking under described motor powering-off state.
6. a kind of floating caliper type disc brake-by-wire device control method, it is characterised in that comprise the steps of：It is described during braking operation
Motor driven described in transmission mechanism work, described one-way clutch combines, and described nut rotation is driven, described in drive
Piston and the movement of described braking clamp body, described friction plate is compressed described brake disc both sides, ECU detection institute
The rotation information for the nut stated, with reference to the size of current of described motor, calculate braking clamping force；When described friction disc wear
When, the described motor of ECU control rotates influence caused by compensate abrasion.
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| CN201710536656.9A CN107435699B (en) | 2017-06-20 | 2017-06-20 | A kind of floating caliper type disc brake-by-wire device and control method |
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| CN201710536656.9A CN107435699B (en) | 2017-06-20 | 2017-06-20 | A kind of floating caliper type disc brake-by-wire device and control method |
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| CN107435699B CN107435699B (en) | 2019-02-05 |
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| CN112413006A (en) * | 2019-08-23 | 2021-02-26 | 比亚迪股份有限公司 | Disc brake and vehicle |
| CN112849109A (en) * | 2019-11-28 | 2021-05-28 | 比亚迪股份有限公司 | Braking system, vehicle and braking method |
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