CN107448520B - A kind of electric mechanical brake-by-wire device - Google Patents
A kind of electric mechanical brake-by-wire device Download PDFInfo
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- CN107448520B CN107448520B CN201710906446.4A CN201710906446A CN107448520B CN 107448520 B CN107448520 B CN 107448520B CN 201710906446 A CN201710906446 A CN 201710906446A CN 107448520 B CN107448520 B CN 107448520B
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- Prior art keywords
- piston
- nut
- braking
- screw rod
- clamp body
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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
- 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
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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
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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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
- F16D2123/00—Multiple operation forces
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to a kind of electric mechanical brake-by-wire device, including motor, transmission mechanism, the screw rod with wedge-shaped regulating mechanism, nut, piston, friction limiting devices etc..Screw rod and nut cooperation, screw nut assembly rotation is driven by transmission mechanism by motor, piston and braking clamp body are respectively driven by bolt and nut transmission to move in the opposite direction, and friction plate is compressed from brake disc two sides with identical power, realizes efficient braking effect.The configuration of the present invention is simple, reliable operation, braking efficiency is high, can automatically adjust brake clearance, and compensation is influenced as caused by friction disc wear, the design of simplified control system can be used for service brake and parking braking.
Description
Technical field
The present invention relates to brake fields, 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 two sides with identical pressure, while it is adjustable to may be implemented brake clearance, braking
The adjustable line traffic control mechanical brake of intensity, refers in particular to a kind of electric mechanical brake-by-wire device.
Background technique
Brake-by-wire technology is a kind of novel braking technology occurred in recent years, between brake and brake pedal not
It is realized by the information control motor work of control system receiving sensor for automobile by mechanical or fluid power connection
Reliable and stable control for brake.Mainly there are electro-hydraulic formula braking system (EHB) and mechanical type brake system electric at present
(EMB) two kinds.Line control brake system is conducive 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.
For electro-hydraulic formula braking system (EHB) from traditional brake fluid system transformation, braking process is rapider,
Stablize, improves the braking safety and comfort of automobile, but due to remaining hydraulic unit, do not have complete brake-by-wire
The all advantages of system are often viewed as the earlier product of one kind of mechanical type brake system electric (EMB).
Mechanical type brake system electric (EMB) realizes braking process by motor drive machinery mechanism, enormously simplifies system
The structure of dynamic system, makes brake more easily arrange, assemble and overhauls.But existing mechanical type brake system electric due to
Often lack the function of brake clearance automatic adjustment in part brake, makes brake in external environmental change and friction plate
The problem for causing brake actuator efficiency change indefinite in the case where abrasion, to bring certain be stranded to brake efficiency control
It is difficult.Meanwhile the problems such as that there are structures is more complicated for most of brake, and installation dimension is larger.
Summary of the invention
It is an object of the invention to propose a kind of electric mechanical brake-by-wire device.The present invention has structure simple, and work can
By the advantages that, can be realized the automatic adjustment of brake clearance, by detect friction plate driving mechanism displacement or corner
Conversion obtains braking clamping force size, to enable the corresponding simplification of control system.
Realize that the technical solution of the object of the invention is as follows:
A kind of electric mechanical brake-by-wire device, include motor, transmission mechanism, screw rod, nut, wedge-shaped regulating mechanism, piston,
Rub limiting device, braking clamp body, brake disc, friction plate；The friction plate has two panels, is arranged symmetrically in the braking
Disk two sides, one is mounted on the piston, and one is mounted on the braking clamp body；The piston is via described
Friction limiting device is mounted on the braking clamp body；Described friction limiting device a part is fixedly mounted on the system
On moving caliper, another part and the piston space have biggish frictional force, when the piston and the braking clamp body it
Between when having relative displacement, since frictional force effect makes to generate elastic potential energy in the friction limiting device；The motor connects
Connect the input element of the transmission mechanism；The final element connection of the transmission mechanism screw rod or the spiral shell
It is female；The screw rod may be mounted on the piston, or be mounted on the braking clamp body；The nut can
To be mounted on the braking clamp body, being perhaps mounted on can also be on the piston or described on the piston
Braking clamp body on machining internal thread, to realize the function of the nut；The screw rod and the piston/described
Installation between braking clamp body can be fixed installation, and being also possible to the screw rod can be around own axis, but edge
The installation of the limitation of movement of axis direction；Installation between the piston of the nut and the braking clamp body/described, can
To be fixed installation or thread mill drilling to realize the function of the nut, being also possible to the nut can be around itself
Axis rotation, but the installation of limitation of movement in the axial direction；The wedge-shaped regulating mechanism is mounted in the screw rod,
The spiro rod length can be made to occur when wedge block moves under actuation mean effect including wedge block and actuation mean
Variation；The screw rod is coupled with the nut, and the braking clamp body can be driven by bolt and nut transmission
It is moved in the opposite direction with the piston, drives the friction plate from brake disc described in two side compressions；
When braking, the motor drives bolt and nut to be driven subtask via the transmission mechanism, described at this time
Screw rod and the nut relative motion, drive the piston and the braking clamp body to move in the opposite direction respectively,
So that the friction plate is pressed on the brake disc two sides, the braking effect of high efficient and reliable is obtained, at this point, the piston
There is relative displacement between the braking clamp body, generates elastic potential energy in the friction limiting device；It is braked when releasing
When, the motor drives the counter motion of bolt and nut transmission, while the friction limit via the transmission mechanism
Elastic potential energy effect inside device, makes the piston and the braking clamp body relative motion, restores initial position, institute
Also corresponding sports are restored to initial position to the screw rod and the nut stated；
When the friction plate have abrasion, thickness it is thinning after, when braking operation, the motor is via the driver
The structure driving bolt and nut is driven subtask, makes the piston and the braking clamp body relative motion, described rubs
It wipes elastic potential energy in limiting device and reaches maximum, since friction plate is thinning, braking effect is bad, and the motor continues at this time
Work, drives the bolt and nut transmission to continue to rotate, overcomes between the piston and the friction limiting device
Frictional force, make the piston and the braking clamp body continue to relatively move, compress brake disc, obtain reliable efficient
Braking effect；When releasing braking, the motor drives the counter motion of bolt and nut transmission via the transmission mechanism,
Elastic potential energy effect in the friction limiting device described simultaneously, makes the piston and the braking clamp body relative motion,
The piston piston and institute relatively fixed therefore described with new contact position with the friction limiting device at this time
Return displacement of the braking clamp body stated when releasing braking is less than displacement during braking operation, at this time the motor band
During the bolt and nut transmission counter motion is moved to be restored to initialization position, it is mounted on the screw rod
In the described wedge-shaped regulating mechanism work, the actuation mean driving wedge block movement keeps the screw rod long
Degree variation realizes the adjust automatically of brake clearance to meet the size requirement after the friction disc wear.
It further include, to reduce frictional resistance, being improved using circulation spherical structure between the screw rod and the nut
System working efficiency.
The wedge block is mounted on can be self-locking in the screw rod, i.e., the pressing force along the screw rod axial direction can not
Keep the wedge block mobile relative to the screw rod.
It further include being adopted in braking clamp body and the screw rod/position that the nut is connect of the piston/described
With roller mechanism, to reduce frictional resistance.
Further include that piston positioning means are set between the piston and the braking clamp body, make the piston without
Method is rotated around own axes direction.
Screw rod described in further including is twin-screw, and one end is left hand thread, and one end is right-handed thread, with corresponding thread segment
It is fitted with corresponding nut or threaded hole.
Nut described in further including is double nut, and one end is left hand thread, and one end is right-handed thread, with corresponding threaded hole
Section is fitted with corresponding screw rod.
When the transmission link for being zero without reverse efficiency in the transmission mechanism or the bolt and nut transmission, use
Lockable mechanism realizes the parking braking under the motor power blackout situation, and the lockable mechanism uses electromagnetic brake or electricity
Mechanical brake device is controlled, actuated element when can disconnect, power off when being powered in fixed conveyor link keeps described and rubs
The size of pressure between pad and the brake disc realizes parking braking function；When the transmission mechanism or the screw rod
When being provided with the transmission link that reverse efficiency is zero in nut transmission, it can use the lockable mechanism and realize parking braking,
Also can use reverse efficiency be zero, power and movement can not back transfer, realize the parking system under the motor power blackout situation
It is dynamic.
Detailed description of the invention
Fig. 1 is a kind of main view of the embodiment one of electric mechanical brake-by-wire device of the invention.
Fig. 2 is a kind of A direction view of the embodiment one of electric mechanical brake-by-wire device of the invention.
Fig. 3 is a kind of main view of the embodiment two of electric mechanical brake-by-wire device of the invention.
Fig. 4 is a kind of main view of the embodiment three of electric mechanical brake-by-wire device of the invention.
Fig. 5 is a kind of main view of the example IV of electric mechanical brake-by-wire device of the invention.
Fig. 6 is a kind of main view of the embodiment five of electric mechanical brake-by-wire device of the invention.
Fig. 7 is a kind of main view of the embodiment six of electric mechanical brake-by-wire device of the invention.
Explanation: 1- brake-caliper support 2- guide pin 3- braking clamp body 4- plain thrust bearing 5- spiral shell is marked in attached drawing
Bar 6- worm gear 7- wedge block 8- worm screw 9- sealing ring 10- motor 11- piston 12- 13-brake disc of friction plate 14- electricity
Arbor 15- electromagnetic brake 16- cylindrical roller 17- spring 18- snap ring 19- primary 20- grade driving tooth of driven gear
Take turns 21- grade driven gear 22- electromagnetic coil 23- lock pin 24- return spring 25- nut 26- radial bearing 27-
Actuate spring 28- tapered roller bearing 29- dive key 30- primary drive gear
Specific embodiment
With reference to attached drawing 1 and attached drawing 2, one embodiment of the present of invention is described in detail.
As shown in Figure 1, a kind of electric mechanical brake-by-wire device includes a caliper that can be moved on guide pin (2)
Body (3), guide pin (2) are fixed on brake-caliper support (1).There are brake disc (13), brake disc in the jaw of braking clamp body (3)
(13) two sides have friction plate (12), and one is mounted on braking clamp body (3), and one is mounted on piston (11), and piston (11) is logical
Sealing ring (9) are crossed on braking clamp body (3), have biggish frictional force between sealing ring (9) and the contact surface of piston (11), when
When the displacement of piston (11) is in the regime of elastic deformation of sealing ring (9), nothing between sealing ring (9) and the contact surface of piston (11)
Relative motion.The other end of piston (11) has hole, and nut (25) are equipped in hole, the hole of nut (25) and piston (11) it
Between have plain thrust bearing (4) and radial bearing (26), to reduce friction loss.The internal screw thread of nut (25) is matched with screw rod (5)
It closes, screw rod (5) is fixedly mounted on braking clamp body (3), equipped with wedge-shaped regulating mechanism in screw rod (5), wedge block (7) and actuates
Screw rod (5) is divided into two sections by spring (27), wedge block (7), and the left side section and right side section of wedge block (7), left side section is relative to the right side
Side section can only move in the axial direction, cannot rotate relative to each other.When left side section relative to right side section move in the axial direction, make spiral shell
When there is gap between bar (5) and the contact surface of wedge block (7), actuating spring (27) keeps wedge block (7) mobile to small end, to mend
Repay gap.Contact surface between wedge block (7) and screw rod (5) is self-locking, i.e., forces along the axis direction application effect of screw rod (5)
When tight wedge block (7), wedge block (7) and screw rod (5) are opposing stationary.Nut (25) is connect with worm gear (6), is cooperated with worm gear (6)
The worm screw (8) of work is driven by motor (10).
When braking operation, motor (10) drives worm screw (8) and worm gear (6) rotation, nut (25) rotation is driven, due to spiral shell
Female (25) are mounted in the hole of piston (11), have bearing between piston (11), therefore the rotation of nut (25) will not cause to live
(11) rotation is filled in, and screw rod (5) is fixedly mounted on braking clamp body (3), can not be rotated, therefore the rotation of nut (25) makes to live
Plug (11) moves downward, meanwhile, screw rod (5) and wedge-shaped regulating mechanism therein move right together with braking clamp body (3), i.e.,
Piston (11) and braking clamp body (3) move in the opposite direction, and corresponding friction plate (12) is driven to force from two sides with identical
To brake disc (13), the braking effect of high efficient and reliable is realized.At this point, flexible deformation occurs for sealing ring (9), elastic potential energy is stored,
Without relative motion between sealing ring (9) and the contact surface of piston (11).When releasing braking operation, motor (10) drives worm and gear
Mechanism rotates backward, and nut (25) also rotates backward together therewith, makes piston (11) and braking clamp body (3) relative motion, sealing
The elastic potential energy release of (9) storage is enclosed, all elements restore initial position.
When friction plate (12) are worn, after thickness is thinning, when braking operation, motor (10) drives spiral shell by worm gear mechanism
Female (25) rotation, pushes piston (11) and braking clamp body (3) relative motion, and the elastic deformation amount of sealing ring (9) reaches maximum
When, since friction plate (12) are worn, braking effect is bad, and motor (10) continues to drive nut (25) rotation, i.e. piston at this time
(11) and braking clamp body (3) continues relative motion, therefore, sealing ring (9) holding maximum flexibility deflection, and piston (11) gram
Frictional force between clothes and sealing ring (9), is matched with new contact surface with sealing ring (9), i.e., piston (11) is relative to braking
The displacement of caliper (3) is greater than the maximum flexibility deflection of sealing ring (9).When releasing braking, motor (10) drives worm and gear machine
Structure reversion, drives nut (25) to reversely rotate, discharges the elastic potential energy of sealing ring (9), move right piston (11), makes
Moving caliper (3) moves downward, and sealing ring (9) and piston (11) are cooperated at this time with new contact surface positions, when sealing ring (9)
After elastic potential energy discharges completely, the position of piston (11) and braking clamp body (3) is remained stationary, and motor (10) drives worm gear at this time
Worm mechanism is continued to rotate to be returned to initial position, and nut (25) also continues to reversely rotate, and drives the left side section of screw rod (5)
It is moved to the left, and right side Duan Ze and braking clamp body (3) are fixed together, therefore the distance between left side section and right side section become
Greatly, there is gap between screw rod (5) and the contact surface of wedge block (7), actuate spring (27) make wedge block (7) to small end it is mobile (to
Upper movement), gap is compensated, so that the length of screw rod (5) be made to increase.The return of piston (11) and braking clamp body (3) is displaced at this time
Amount is still the maximum flexibility deflection of sealing ring (9), thus maintain brake clearance with abrasion before it is identical, realize braking
The adjust automatically in gap.
When the transmission reverse efficiency of worm screw (8) and worm gear (6) is zero or the bolt and nut transmission of screw rod (5) and nut (25)
When secondary self-locking, motor (10) driving friction plate (12) can be made to compress brake disc (13), after reaching parking braking requirement, utilized
The self-locking function of worm gear mechanism or the self-locking effect of bolt and nut transmission realize the parking under motor (10) power blackout situation
Braking.
With reference to attached drawing 3, another embodiment of the invention is described.
The embodiment of attached drawing 3 and the embodiment main distinction of attached drawing 1 are as follows:
Piston positioning means are different, due to the torque very little that piston is subject in attached drawing 1, are not provided with piston positioning means；
Piston positioning means are used as using cylindrical roller (16) in attached drawing 3, piston (11) is axially moveable can only, can not rotate.
Transmission mechanism is different, is driven in attached drawing 1 using worm gear mechanism, and worm gear (6) is the final element of transmission mechanism,
It is fixedly connected with nut (25)；Two-stage gear drive is used in attached drawing 3, secondary driven gear (21) is the terminal of transmission mechanism
Element is fixedly connected with nut (25).
Connection type is different, and the nut (25) of the final element connection of transmission mechanism is mounted on piston (11) in attached drawing 1,
It can be fixedly mounted on braking clamp body (3) around own axis, screw rod (5)；The final element of transmission mechanism connects in attached drawing 3
The nut (25) connect is mounted on braking clamp body (3), can be fixedly mounted on piston (11) around own axis, screw rod (5)
On.
Wedge-shaped regulating mechanism is different, and wedge-shaped regulating mechanism uses a wedge block (7) in attached drawing 1, actuates spring (27) one
End is connected with the small end of wedge block (7), and the other end is fixed on screw rod (5)；Wedge-shaped regulating mechanism uses two wedges in attached drawing 3
Shape block (7) is symmetrically mounted in screw rod (5), is actuated spring (27) and is mounted between wedge block (7).In addition, wedge block (7)
Shape is also different.
The limiting device that rubs is different, realizes friction limit function using sealing ring (9) in attached drawing 1, utilizes sealing ring (9)
Flexible deformation stores elastic potential energy；Friction limit function is realized using spring (17) and snap ring (18) in attached drawing 3, utilizes spring
(17) it generates flexible deformation and stores elastic potential energy.
The mode that parking braking function is realized is different, and in attached drawing 1, the reverse efficiency using worm gear mechanism is zero or screw rod
Nut transmission it is self-locking, the parking braking under motor (10) power blackout situation directly may be implemented；In attached drawing 3, use is illustrated
Motor shaft (14) are discharged when electromagnetic brake (15) is powered, locking motor shaft (14) realizes motor (10) power blackout situation when power-off
Under parking braking mode, also illustrate the parking braking mode using electric-controlled mechanical brake apparatus, electromagnetic coil (22) is powered
When, lock pin (23) is kept lock pin (23) and secondary driven gear (21) mutual by electromagnetic force, compression retracteding position spring (24)
It does not contact, braking or the no any influence of release to brake；When needing parking braking, motor (10) drives friction plate
(12) brake disc (13) are compressed, reaches parking braking requirement, then electromagnetic coil (22) powers off, and lock pin (23) is in return bullet
In the lower tooth for being inserted into secondary driven gear (21) of the elastic force effect of spring (24), parking braking effect is kept, motor can be realized
(10) parking braking function under power blackout situation.
As shown in figure 3, there is brake disc (13) in the jaw of braking clamp body (3), there are friction plate in the two sides of brake disc (13)
(12), one is mounted on braking clamp body (3), and one is mounted on piston (11), and piston (11) is mounted on braking by snap ring (18)
On caliper (3), snap ring (18) pushes the side far from brake disc (13) to by spring (17), and spring (17) is mounted on braking clamp body
(3) on.There is biggish frictional force between snap ring (18) and the contact surface of piston (11), when the displacement of piston (11) is in spring (17)
Regime of elastic deformation in when, without relative motion between snap ring (18) and the contact surface of piston (11).Nut (25) is rolled by circular cone
Sub- bearing (28) is supported on braking clamp body (3).Friction plate (12) are installed in one end of piston (11), and band is fixedly mounted in the other end
There is the screw rod (5) of wedge-shaped regulating mechanism, screw rod (5) and nut (25) cooperate, and nut (25) and secondary driven gear (21) are even
It connects, secondary driven gear (21), secondary driving gear (20), primary driven gear (19) and primary drive gear (30) are constituted
Two-stage gear reduction, primary drive gear (30) are fixedly mounted on motor shaft (14).
When braking operation, motor (10) passes through two-stage gear reduction driving nut (25) rotation, cylindrical roller (16)
It as piston positioning means, rotate piston (11) can not, i.e., screw rod (5) can not rotate, therefore pass through bolt and nut transmission
It pushes piston (11) and braking clamp body (3) to move in the opposite direction, drives corresponding friction plate (12) from two sides with identical
It forces to brake disc (13), realizes the braking effect of high efficient and reliable.At this point, snap ring (18) and piston (11) move together, compression
Flexible deformation occurs for spring (17), spring (17), elastic potential energy is stored, without phase between snap ring (18) and the contact surface of piston (11)
To movement.When releasing braking operation, motor (10) drives two-stage gear reduction to rotate backward, and nut (25) is therewith together
It rotates backward, makes piston (11) and braking clamp body (3) relative motion, the elastic potential energy release of spring (17) storage, all elements
Restore initial position.
When friction plate (12) are worn, after thickness is thinning, when braking operation, motor (10) is driven by two-stage gear reduction
Dynamic nut (25) rotation, pushes piston (11) and braking clamp body (3) relative motion, and the elastic deformation amount of spring (17) reaches most
Greatly, snap ring (18) is close to when on the step surface of left side, and since friction plate (12) are worn, braking effect is bad, at this time motor (10)
Driving nut (25) continues to rotate, i.e., piston (11) and braking clamp body (3) continue relative motion, and therefore, spring (17) is kept most
Big elastic deformation amount, and piston (11) overcomes the frictional force between snap ring (18), is matched with new contact surface and snap ring (18)
It closes.Release braking when, motor (10) drive two-stage gear reduction reversion, drive nut (25) reversion, make piston (11) and
Braking clamp body (3) relative motion, the elastic potential energy release of spring (17), snap ring (18) is with piston (11) with new contact at this time
Face cooperation positions, and the spring (27) that actuates in wedge-shaped regulating mechanism keeps wedge block (7) mobile to small end, and the length of screw rod (5) increases
Add, to compensate change in size caused by friction plate (12) abrasion, makes the return displacement of piston (11) and braking clamp body (3) still
Be so the maximum flexibility deflection of spring (17), thus maintain brake clearance with abrasion before it is identical, realize brake clearance
Adjust automatically.
When needing parking braking, so that motor (10) driving friction plate (12) is compressed brake disc (13), reach parking braking
It is required that then electromagnetic brake (15) powers off, locking motor shaft (14) keeps brake efficiency constant, motor can be realized at this time
(10) parking braking function under power blackout situation.It when electromagnetic brake (15) is powered, discharges motor shaft (14), braking turns at this time
Square size can freely be controlled by motor (10).Or electric-controlled mechanical brake apparatus is used, when energization, electromagnetic coil (22) makes to lock
Shotpin (23) return, when power-off, lock pin (23) is inserted into the tooth of secondary driven gear (21), realizes that motor (10) power off feelings
Parking braking function under condition.Or it is realized under motor (10) power blackout situation using the self-locking effect of bolt and nut transmission
Parking braking.
In this embodiment, electric-controlled mechanical brake apparatus can also be acted directly on primary driven gear (19), or secondary
It on driving gear (20), or acts on the locking wheel being specially arranged, similar parking braking effect can be obtained.
In attached drawing 4, the final element connection of transmission mechanism is with the screw rod (5) of wedge-shaped regulating mechanism, screw rod (5) and processing
Threaded hole cooperation on braking clamp body (3), the other end are mounted on work by plain thrust bearing (4) and radial bearing (26)
In the hole for filling in (11).In attached drawing 5, the final element connection of transmission mechanism is with the screw rod (5) of wedge-shaped regulating mechanism, screw rod (5)
It is mounted on braking clamp body (3) by plain thrust bearing (4) and radial bearing (26), with spiral shell of the processing on piston (11)
Pit cooperation, piston (11) are positioned by dive key (29), can only move, can not rotate in the axial direction.In attached drawing 6, band
There are two the screw rods (5) for having wedge-shaped regulating mechanism, and one is fixedly mounted on braking clamp body (3), and one is fixedly mounted on piston
(11) on, one is left hand thread, and one is right-handed thread, and the nut connecting with the final element of transmission mechanism (25) is double
Nut, one end are left hand thread, and one end is right-handed thread, are cooperated simultaneously with two screw rods (5), piston (11) passes through guide flat
Key (29) positioning, can only move in the axial direction, can not rotate.In attached drawing 7, the spiral shell that is connect with the final element of transmission mechanism
Bar (5) is the twin-screw with wedge-shaped regulating mechanism, and one end is left hand thread, and one end is right-handed thread, piston (11) and braking
Caliper is threaded hole on (3), is threadedly engaged respectively with two sections of screw rod (5), and piston (11) is fixed by dive key (29)
Position, can only move in the axial direction, can not rotate.Embodiment in above several attached drawings, braking operation process and braking
Gap adjustment process is similar with the first two embodiment, and which is not described herein again.
Transmission mechanism can also use chain conveyer, V belt translation, lever in addition to using fixed axis gear mechanism, worm gear mechanism
Other kinds of drive such as transmission, drag-line transmission, Planetary Gear Transmission, friction limiting device, which removes, uses sealing ring, spring/snap ring
Similar function can also be achieved using other structures outside, piston positioning means, which are removed, uses dive key, cylindrical roller
It outside can also lock pin can also be acted on it by various ways, lockable mechanism using spline, pin, outer surface of piston be non-circular etc.
On dedicated latch ratchet on his gear or with gear one, or the modes such as ratchet and pawl arrangement are installed on motor shaft and are realized
Latch functions, the quantity of wedge block can also be three or more in wedge-shaped regulating mechanism, and the shape of wedge block can also have more
Kind of variation, in addition, can also be steady to enhance work by the structure of the similar boss of installation on contact surface of the wedge block with screw rod
It is qualitative.Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments, based on this
Embodiment in invention, one of ordinary skilled in the art under the premise of no progress creative work it is obtained its
His all embodiments, belong to protection scope of the present invention.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved direct application
It is within the scope of the present invention in other occasions.
Claims (8)
- It include motor 1. a kind of electric mechanical brake-by-wire device, transmission mechanism, screw rod, nut, wedge-shaped regulating mechanism, piston rubs Wipe limiting device, braking clamp body, brake disc, friction plate；The friction plate has two panels, is arranged symmetrically in the brake disc two Side, one is mounted on the piston, and one is mounted on the braking clamp body；The piston is via the friction Limiting device is mounted on the braking clamp body；Described friction limiting device a part is fixedly mounted on the caliper On body, another part and the piston space have biggish frictional force, have when between the piston and the braking clamp body When relative displacement, since frictional force effect makes to generate elastic potential energy in the friction limiting device；The motor connects institute The input element for the transmission mechanism stated；The final element connection of the transmission mechanism screw rod or the nut；Institute The screw rod stated may be mounted on the piston, or be mounted on the braking clamp body；The nut can be installed On the braking clamp body, being perhaps mounted on the piston can also be on the piston or the braking Machining internal thread on caliper, to realize the function of the nut；The braking clamp body of the screw rod and the piston/described Between installation, can be fixed installation, being also possible to the screw rod can be around own axis, but in the axial direction The installation of limitation of movement；Installation between the piston of the nut and the braking clamp body/described, can be fixed peace Dress or thread mill drilling to realize the function of the nut, be also possible to the nut can around own axis, but The installation of limitation of movement in the axial direction；The wedge-shaped regulating mechanism is mounted in the screw rod, including wedge block and Actuation mean can make the spiro rod length change when wedge block moves under actuation mean effect；The spiral shell Bar is coupled with the nut, can be driven by bolt and nut transmission the braking clamp body and the piston to Opposite direction movement, drives the friction plate from brake disc described in two side compressions；When braking, the motor drives bolt and nut to be driven subtask via the transmission mechanism, at this time the screw rod With the nut relative motion, drives the piston and the braking clamp body to move in the opposite direction respectively, make institute The friction plate stated is pressed on the brake disc two sides, obtains the braking effect of high efficient and reliable, at this point, the piston and described Braking clamp body between have relative displacement, generate elastic potential energy in the friction limiting device；It is described when releasing braking Motor drive the counter motion of bolt and nut transmission via the transmission mechanism, while inside the friction limiting device Elastic potential energy effect, make the piston and the braking clamp body relative motion, restore initial position, the screw rod and Also corresponding sports are restored to initial position to the nut；When the friction plate have abrasion, thickness it is thinning after, when braking operation, the motor drives via the transmission mechanism It moves the bolt and nut and is driven subtask, make the piston and the braking clamp body relative motion, the friction limit Elastic potential energy reaches maximum in the device of position, and since friction plate is thinning, braking effect is bad, and the motor works at this time, It drives the bolt and nut transmission to continue to rotate, overcomes the friction between the piston and the friction limiting device Power makes the piston and the braking clamp body continue to relatively move, and compresses brake disc, obtains reliable efficient braking effect Fruit；When releasing braking, the motor drives the counter motion of bolt and nut transmission via the transmission mechanism, while described Friction limiting device in elastic potential energy effect, make the piston and the braking clamp body relative motion, it is described at this time Piston and the friction limiting device piston relatively fixed therefore described with new contact position and the caliper Return displacement of the body when releasing braking is less than displacement during braking operation, and the motor drives the screw rod at this time During the counter motion of nut transmission is to be restored to initialization position, the wedge shape that is mounted in the screw rod Regulating mechanism work, the actuation mean driving wedge block movement, changes the spiro rod length, to meet Size requirement after the friction disc wear stated, realizes the adjust automatically of brake clearance.
- 2. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that further include in the screw rod System working efficiency is improved to reduce frictional resistance using circulation spherical structure between the nut.
- 3. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that the wedge block is mounted on Can be self-locking in the screw rod, i.e., the pressing force along the screw rod axial direction can not make the wedge block relative to described Screw rod is mobile.
- 4. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that further include the piston/ The position that the braking clamp body and the screw rod/nut are connect is using roller mechanism, to reduce frictional resistance.
- 5. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that further include in the piston Piston positioning means are set between the braking clamp body, rotate the piston can not around own axes direction.
- 6. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that further include that the screw rod is Twin-screw, one end are left hand thread, and one end is right-handed thread, are fitted with corresponding nut or spiral shell with corresponding thread segment Pit.
- 7. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that further include that the nut is Double nut, one end are left hand thread, and one end is right-handed thread, are fitted with corresponding screw rod with corresponding screw thread hole section.
- 8. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that when the transmission mechanism or When the transmission link for being zero without reverse efficiency in the bolt and nut transmission, realize that the motor powers off using lockable mechanism In the case of parking braking, the lockable mechanism use electromagnetic brake or electric-controlled mechanical brake apparatus, can be powered when Disconnect, power-off when fixed conveyor link in actuated element, keep the big of pressure between the friction plate and the brake disc It is small, realize parking braking function；It is zero when being provided with reverse efficiency in the transmission mechanism or the bolt and nut transmission Transmission link when, can use the lockable mechanism and realize parking braking, also can use reverse efficiency be zero, power and fortune It is dynamic can not back transfer, realize the parking braking under the motor power blackout situation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906446.4A CN107448520B (en) | 2017-09-26 | 2017-09-26 | A kind of electric mechanical brake-by-wire device |
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| CN201710906446.4A CN107448520B (en) | 2017-09-26 | 2017-09-26 | A kind of electric mechanical brake-by-wire device |
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| CN107448520A CN107448520A (en) | 2017-12-08 |
| CN107448520B true CN107448520B (en) | 2019-03-22 |
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| CN201710906446.4A Active CN107448520B (en) | 2017-09-26 | 2017-09-26 | A kind of electric mechanical brake-by-wire device |
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| CN108591306B (en) * | 2017-12-29 | 2020-08-04 | 浙江师范大学 | Electronic mechanical brake-by-wire |
| CN108194535B (en) * | 2018-01-03 | 2022-04-22 | 浙江师范大学 | Electronic mechanical brake-by-wire |
| CN114658772A (en) * | 2018-01-03 | 2022-06-24 | 浙江师范大学 | Electronic mechanical line control brake with more stable transmission characteristic |
| CN108253042B (en) * | 2018-01-03 | 2020-05-26 | 浙江师范大学 | Electronic mechanical brake-by-wire |
| CN108317186B (en) * | 2018-01-26 | 2020-05-26 | 浙江师范大学 | Electronic mechanical brake-by-wire |
| EP3604844A1 (en) * | 2018-08-03 | 2020-02-05 | Ondal Medical Systems GmbH | Bearing assembly |
| CN109281999B (en) * | 2018-11-07 | 2023-09-01 | 段沧桑 | Comprehensive self-locking mechanism |
| CN109099085B (en) * | 2018-11-09 | 2024-05-03 | 山东交通学院 | Wedge-shaped reinforcement type linear control actuator |
| CN109114135B (en) * | 2018-11-09 | 2024-05-03 | 山东交通学院 | Electromagnetic type drive-by-wire electronic brake |
| DE102019104890A1 (en) * | 2019-02-26 | 2020-08-27 | Kendrion (Villingen) Gmbh | Electromagnetic brake or clutch |
| CN110425236B (en) * | 2019-07-27 | 2021-01-15 | 浙江师范大学 | Self-energizing wire control actuator |
| CN110566603B (en) * | 2019-08-20 | 2021-02-02 | 浙江师范大学 | Wire control actuator |
| CN110686027B (en) * | 2019-10-19 | 2020-09-01 | 山东理工大学 | One-way single-stage boosting type electromechanical brake actuator based on linear motor |
| CN112797095B (en) * | 2021-01-04 | 2022-06-28 | 中车青岛四方车辆研究所有限公司 | Parking brake cylinder and brake caliper unit |
| CN114483822B (en) * | 2022-03-09 | 2023-06-30 | 浙江师范大学 | Linear control actuator |
| CN114382802B (en) * | 2022-03-09 | 2023-06-30 | 浙江师范大学 | Linear control actuator |
| CN114396439B (en) * | 2022-03-09 | 2023-06-30 | 浙江师范大学 | Linear control actuator |
| CN117662650A (en) * | 2022-08-30 | 2024-03-08 | 芜湖伯特利汽车安全系统股份有限公司 | Brake caliper |
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