CN108194535A - A kind of electric mechanical brake-by-wire device - Google Patents
A kind of electric mechanical brake-by-wire device Download PDFInfo
- Publication number
- CN108194535A CN108194535A CN201810024718.2A CN201810024718A CN108194535A CN 108194535 A CN108194535 A CN 108194535A CN 201810024718 A CN201810024718 A CN 201810024718A CN 108194535 A CN108194535 A CN 108194535A
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- nut
- piston
- braking
- connecting rod
- clamp body
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- 230000007246 mechanism Effects 0.000 claims abstract description 73
- 230000033001 locomotion Effects 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 46
- 230000000694 effects Effects 0.000 claims abstract description 23
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 238000005381 potential energy Methods 0.000 claims description 20
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000005299 abrasion Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 20
- 230000006870 function Effects 0.000 description 13
- 230000005489 elastic deformation Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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
- F16D55/225—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 the braking members being brake pads
- F16D55/226—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 the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
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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
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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, screw rod, nut, piston, the connecting rod with wedge-shaped regulating mechanism, friction limiting device etc..Motor drives screw-and-nut mechanism by transmission mechanism, the movement of connecting rod is driven by screw-and-nut mechanism, driving piston and braking clamp body move in the opposite direction, compress friction plate from brake disc both sides with identical power, realize efficient braking effect.The configuration of the present invention is simple, reliable operation, braking 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 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, while can realize that brake clearance is adjustable from both sides with identical pressure, brakes
The adjustable line traffic control mechanical brake of intensity, refers in particular to a kind of electric mechanical brake-by-wire device.
Background technology
Brake-by-wire technology is a kind of novel braking technology occurred in recent years, between brake and brake pedal not
By machinery or fluid power connection, by the information control motor work of control system receiving sensor, realize for automobile
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 with wide development space.
Electro-hydraulic formula braking system (EHB) is transformed by traditional brake fluid system, and braking process is rapider,
Stablize, improve the braking safety and comfort of automobile, but due to remaining hydraulic unit, do not have complete brake-by-wire system
The all advantages of system are often viewed as a kind of product in advance 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
Part brake often lacks the function of brake clearance automatic adjustment, makes brake in external 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 most of brake is more complicated there are structure, and installation dimension is larger.
Invention content
It is an object of the invention to propose a kind of electric mechanical brake-by-wire device.The present invention have it is simple in structure, work can
By the advantages that, the automatic adjustment of brake clearance can be realized, by the displacement or the corner that detect friction plate driving mechanism, you can change
Calculation obtains braking clamping force size, so as 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 includes motor, transmission mechanism, screw rod, nut, connecting rod, wedge-shaped adjusting machine
Structure, piston, rub limiting device, braking clamp body, brake disc, friction plate；The friction plate has two panels, is arranged symmetrically in described
Brake disc both sides, one be mounted on the piston on, one be mounted on the braking clamp body on；The piston via
The friction limiting device is mounted on the braking clamp body；The friction limiting device part is fixedly mounted on institute
On the braking clamp body stated, there is larger frictional force between another part and the outer surface of piston, when the piston with it is described
Braking clamp body between when having relative displacement, since frictional force effect makes to generate elastic potential energy in the friction limiting device；
The input element of the motor connection transmission mechanism；Spiral shell described in the final element connection of the transmission mechanism
Bar, the screw rod have external screw thread, coordinate with the female nut；The screw rod can be around own axes direction
Rotation, but along the mobile restricted of own axes direction；Nut between the nut and the piston, described with it is described
Braking clamp body between connected using the connecting rod；The wedge-shaped regulating mechanism is mounted in the connecting rod,
Including wedge block and actuation mean, it when wedge block moves under actuation mean effect, can send out the connection pole length
Changing；The final element movement of the transmission mechanism, drives the screw rod to rotate, the nut is by the connection
Bar influences, and can not rotate, and the screw rod described at this time can not be moved along own axes direction, therefore the nut can only be along described
Screw rod axis direction movement, the connecting rod is driven move, the connecting rod driving described in braking clamp body and institute
The piston stated moves in the opposite direction, drives the brake disc described in the friction plate from two side compressions；
During braking, the motor is rotated via the transmission mechanism driving screw rod, is passed by bolt and nut
The motivation structure driving nut movement, drives the connecting rod to move, the connecting rod driving piston and institute
The braking clamp body stated moves in the opposite direction respectively, and the friction plate is made to be pressed on the brake disc both sides, obtains height
Reliable braking effect is imitated, at this point, having relative displacement between the piston and the braking clamp body, is limited in the friction
Elastic potential energy is generated in the device of position；When releasing braking, the motor is via the transmission mechanism driving screw rod
Counter motion, meanwhile, the elastic potential energy effect inside the friction limiting device makes the piston and the caliper
Body relative motion restores initial position, and also corresponding sports are restored to initial position to the screw-and-nut mechanism；
When the friction plate have abrasion, thickness it is thinning after, during braking operation, the motor is via the driver
The structure driving screw rod rotation, makes the piston and the braking clamp body relative motion, the friction limiting device
Interior elastic potential energy reaches maximum, and since friction plate is thinning, braking effect is bad, and the motor described at this time works on, and drives institute
The screw rod stated is rotated further, and is overcome the frictional force between the outer surface of the piston and the friction limiting device, is made institute
The piston and the braking clamp body stated continue to relatively move, and compress brake disc, obtain reliable efficient braking effect；Release system
When dynamic, the motor is via the transmission mechanism driving screw rod counter motion, while friction limiting fills
Elastic potential energy effect in putting, makes the piston and the braking clamp body relative motion, the piston described at this time with it is described
Friction limiting device be relatively fixed with new contact position, therefore the piston and the braking clamp body are braked releasing
When return displacement be less than displacement during braking operation, the motor described at this time drives the screw-and-nut mechanism
During counter motion is to be restored to initialization position, the wedge-shaped regulating mechanism in the connecting rod
Work, the actuation mean driving wedge block movement, changes the connection pole length, to meet described rub
The adjust automatically of brake clearance is realized in size requirement after pad abrasion.
It is additionally included between the screw rod and the nut using cycle spherical structure, to reduce frictional resistance, improves
System working efficiency.
The wedge block be mounted on the connecting rod in can self-locking, i.e., along the pitman shaft to pressing force
The wedge block can not be made to be moved relative to the connecting rod.
The connecting rod size is identical, is symmetrical arranged.
The final element connection of the transmission mechanism nut is further included, the nut can be around own axes
Direction rotates, but along the mobile restricted of own axes direction；The nut has internal thread, with there is the externally threaded screw rod
Cooperation；Using described between screw rod and the braking clamp body between the screw rod and the piston, described
Connecting rod connects；The final element movement of the transmission mechanism, drives the nut rotation, the screw rod is by described
Connecting rod influences, and can not rotate, the nut described at this time can not be moved along own axes direction, therefore the screw rod can only edge
The axis direction movement of the nut, drives the connecting rod to move, the connecting rod driving braking clamp body
It is moved in the opposite direction with the piston, drives the brake disc described in the friction plate from two side compressions；It is that is, described
Screw rod, the nut, the frame mode of two elements exchange function.
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 automatically controlled
Mechanical brake device can be disconnected when being powered, and actuated element during power-off in fixed conveyor link keeps the friction plate
The size of pressure between the brake disc realizes parking braking function；When the transmission mechanism or the bolt and nut
When the transmission link that reverse efficiency is zero is provided in transmission, the lockable mechanism can be utilized to realize parking braking, also may be used
Using using reverse efficiency as zero, power and movement can not back transfer, realize the parking braking under the motor power blackout situation.
Connection between the connecting rod and the screw/nut/piston/braking clamp body, can be by described
Position when relative motion between connecting rod and the screw/nut/piston/braking clamp body meets brake operation between component
Variation is put, the elasticity of junction between the connecting rod and the screw/nut/piston/braking clamp body can also be passed through
Change in location when deformation meets brake operation between component.
Further include the power input element (screw rod in claim 1 being connect with the final element of the transmission mechanism
Or the nut in claim 5) on the braking clamp body, only in the power output element (nut in claim 1
Or the screw rod in claim 5) connecting rod is set between the piston；Or the end with the transmission mechanism
The power input element (nut in screw rod or claim 5 in claim 1) of end element connection is mounted on the work
Beyond the Great Wall, only power output element (screw rod in nut or claim 5 in claim 1) and the braking clamp body it
Between these four frame modes of the connecting rod are set.
Also include using roller structure in the mating surface of the piston and the braking clamp body, to reduce friction resistance
Power improves system working efficiency.
The connecting rod is divided into left side section and right side section, the wedge block and the connection by the wedge block
There is location feature in the junction of bar, and the left side section and right side section for making the connecting rod are reliably connected by the wedge block
Together, left side section can only move in the axial direction relative to the right side section, the phase in other directions can not occurs
To movement, the wedge block can only move in the connecting rod along the force direction that actuates of the actuation mean, can not
The movement or rotation in other directions are realized, to improve Assembly stability and functional reliability.
Description of the drawings
Fig. 1 is a kind of front view of the embodiment one of electric mechanical brake-by-wire device of the present invention.
Fig. 2 is a kind of front view of the embodiment two of electric mechanical brake-by-wire device of the present invention.
Fig. 3 is a kind of front view of the embodiment three of electric mechanical brake-by-wire device of the present invention.
Explanation is marked in attached drawing：1- brake-caliper support 2- guide pin 3- braking clamp body 4- screw rods 5- actuates spring 6-
Connecting rod 7- nut 8- wedge block 9- locking wheel 10- motor 11- motor shaft 12- electromagnetic brake 13- sealing rings 14-
Piston 15- friction plate 16- brake disc 17- snap ring 18- spring 19- driving gear 20- driven gear 21- return springs
22- electromagnetic coil 23- lock pin 24- worm gear 25- worm screw 26- locating slide sleeves
Specific embodiment
Refer to the attached drawing 1, is described in detail one embodiment of the present of invention.
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 (16), brake disc in the jaw of braking clamp body (3)
(16) there are friction plate (15) in both sides, and one is mounted on braking clamp body (3), and one is mounted on piston (14), and piston (14) passes through
For snap ring (17) on braking clamp body (3), snap ring (17) pushes the side far from brake disc (16), spring (18) to by spring (18)
On braking clamp body (3).There is larger frictional force between the contact surface of snap ring (17) and piston (14), when the position of piston (14)
When moving in the regime of elastic deformation of spring (18), without relative motion between the contact surface of snap ring (17) and piston (14).Piston
(14) opposite side has screw rod (4), there is external screw thread, coordinates with female nut (7) and installs, nut (7) and piston (14)
Between and nut (7) and braking clamp body (3) between with connecting rod (6) connect, connecting rod (6) be symmetrical arranged, connecting rod (6)
In equipped with wedge-shaped regulating mechanism, wedge block (8) and actuate spring (5), connecting rod (6) is divided into two sections by wedge block (8), wedge block
(8) left side section and right side section, wedge block (8) combines left side section and right side section with one locating slide sleeve of location feature (26), fixed
Position sliding sleeve (26) is coated on the outer surface of connecting rod (6), and the left side section and right side section for making connecting rod (6) can by wedge block (8)
That leans on links together, and left side section can only move in the axial direction relative to right side section, the opposite fortune in other directions can not occurs
It is dynamic, ensure the Assembly stability and functional reliability of connecting rod (6).Wedge block (8) can only be along the motivator side for actuating spring (5)
To movement.When left side section relative to right side section move in the axial direction, make to go out between the contact surface of connecting rod (6) and wedge block (8)
During existing gap, actuating spring (5) makes wedge block (8) be moved to small end, to compensate gap.Between wedge block (8) and connecting rod (6)
The self-locking of pressing contact face, i.e., along the axis direction of connecting rod (6) apply active force compress wedge block (8) when, wedge block (8) with
Connecting rod (6) is opposing stationary.Screw rod (4) is fixedly connected with driven gear (20), and driven gear (20) is engaged with driving gear (19),
Driving gear (19) is fixedly mounted on motor shaft (11).
During braking operation, motor (10) driving driving gear (19) rotates, and driven gear (20) is driven to rotate, that is, drives spiral shell
Bar (4) rotates, and nut (7) is limited by connecting rod (6), can not rotated, can only moved along the axis direction of screw rod (4), due to
The axis direction of screw rod (4) is mobile restricted, therefore nut (7) moves upwards, and connecting rod (6) is driven to push piston (14) and braking
Caliper (3) moves in the opposite direction, and corresponding friction plate (15) is driven to be forced from both sides with identical to brake disc (16), real
The braking effect of existing high efficient and reliable.At this point, snap ring (17) and piston (14) move together, and compressed spring (18), spring (18) hair
Without relative motion between the contact surface of raw flexible deformation, storage elastic potential energy, snap ring (17) and piston (14).Release braking operation
When, motor (10) drives screw-and-nut mechanism to rotate backward, meanwhile, the elastic potential energy release of spring (18) storage makes work
(14) and braking clamp body (3) relative motion is filled in, all elements restore initial position.
When friction plate (15) is worn, after thickness is thinning, during braking operation, motor (10) drives screw rod by gear mechanism
(4) it rotates, pushes piston (14) and braking clamp body (3) relative motion, the elastic deformation amount of spring (18) reaches maximum, snap ring
(17) it is close to when on the step surface of left side, since friction plate (15) is worn, braking effect is bad, the screw rod of motor (10) driving at this time
(4) it is rotated further, i.e., piston (14) and braking clamp body (3) continue relative motion, and therefore, spring (18) keeps maximum flexibility deformation
Amount, and piston (14) overcomes the frictional force between snap ring (17), is matched with new contact surface with snap ring (17).Release braking
When, motor (10) drives gear mechanism reversion, and screw rod (4) is driven to invert, meanwhile, the elastic potential energy release of spring (18) makes work
(14) and braking clamp body (3) relative motion is filled in, snap ring (17) and piston (14) coordinate positioning with new contact surface at this time, work as spring
(18) after the release completely of elastic potential energy, the position of piston (14) and braking clamp body (3) remains stationary as, and motor (10) drives at this time
Screw rod (4) continues to rotate backward to be restored to initial position, and the part that nut (7) drives connecting rod (6) to be connected thereto is continued
It is mobile, and the part that connecting rod (6) is connected on piston (14) and braking clamp body (3) is then fixed together therewith, therefore connects
The distance between left side section and right side section of extension bar (6) become larger, and gap occur between the contact surface of connecting rod (6) and wedge block (8),
Actuating spring (5) makes wedge block (8) be moved to small end, compensates gap, so as to increase the length of connecting rod (6).Piston at this time
(14) and the return displacement of braking clamp body (3) is still the maximum flexibility deflection of spring (18), therefore maintains brake cabin
Gap is identical with before abrasion, realizes the adjust automatically of brake clearance.
When needing parking braking, make motor (10) that friction plate (15) be driven to compress brake disc (16), reach parking braking
It is required that then electromagnetic brake (12) powers off, locking motor shaft (11) keeps brake efficiency constant, motor can be realized at this time
(10) parking braking function under power blackout situation.When electromagnetic brake (12) is powered, motor shaft (11) is discharged, at this time braking moment
Size can freely be controlled by motor (10).Or electric-controlled mechanical brake apparatus is used, locking wheel is installed on motor shaft (11)
(9), when electromagnetic coil (22) is powered, lock pin (23) is by electromagnetic force, compression retracteding position spring (21), make lock pin (23) with
Locking wheel (9) is not in contact with each other, braking or the no any influence of release to brake；When needing parking braking, motor (10)
Friction plate (15) is driven to compress brake disc (16), reaches parking braking requirement, then electromagnetic coil (22) powers off, lock pin (23)
It is inserted into the tooth of locking wheel (9) under the elastic force effect of return spring (21), keeps parking braking effect, you can realize motor
(10) parking braking function under power blackout situation.It is directly sharp or when the reverse efficiency between screw rod (4) and nut (7) is zero
The characteristics of with bolt and nut transmission reverse efficiency being zero, realizes parking braking.
In this embodiment, electric-controlled mechanical brake apparatus can also act directly on driving gear (19) or driven gear
(20) on, it can obtain similar parking braking effect.
Refer to the attached drawing 2, is described an alternative embodiment of the invention.
The embodiment of attached drawing 2 and the embodiment main distinction of attached drawing 1 are as follows：
Transmission mechanism is different, using gear mechanism transmission, screw rod (4) connection driven gear (20) in attached drawing 1；In attached drawing 2
It is driven using worm gear mechanism, worm gear (24) is the final element of transmission mechanism, and nut (7) connects worm gear (24).
The limiting device that rubs is different, realizes friction limit function using spring (18) and snap ring (17) in attached drawing 1, utilizes bullet
Spring (18) generates flexible deformation storage elastic potential energy；Friction limit function is realized using sealing ring (13) in attached drawing 2, utilizes sealing
Enclose the flexible deformation storage elastic potential energy of (13).
Power input element, power output element are different, using screw rod (4) as power input element in attached drawing 1, with biography
The final element of motivation structure is connected, and nut (7) passes through connecting rod (6) and piston (14)/braking clamp body as power output element
(3) it is connected；It is connected in attached drawing 2 using nut (7) as power input element with the final element of transmission mechanism, screw rod (4) is made
For power output element, it is connected by connecting rod (6) with piston (14)/braking clamp body (3).
The mode that parking braking function is realized is different, in attached drawing 1, is discharged when illustrating and being powered using electromagnetic brake (12)
Motor shaft (11), the mode of locking motor shaft (11) is realized parking braking under motor (10) power blackout situation and is adopted during power-off
With the parking braking mode of automatically controlled mechanical brake device；It, can be with when using reverse efficiency as zero worm gear mechanism in attached drawing 2
Directly parking braking function is realized using worm gear mechanism, can also utilize lockable mechanism, i.e., aforementioned electromagnetic brake, electricity
It controls mechanical brake device etc. and realizes parking braking function.
The connection mode of connecting rod is different, in attached drawing 1 connecting rod (6) and nut (7)/piston (14)/braking clamp body (3) it
Between connection mode for elastic connection, during braking operation and release in braking process, expired by the flexible deformation of junction
Relative motion requirement between each component of foot.It is hinge connection in the embodiment of attached drawing 2, the work of system is met by hinge movement
It is required.
Location feature is different, and the location feature of the wedge block (8) in attached drawing 2 passes through T-shape slot feature using T-shape slot
The left side section and right side section for making connecting rod (6) reliably link together with wedge block (8), and left side section is relative to right side section
It can only move in the axial direction, the relative motion in other directions can not occur, ensure Assembly stability and the work of connecting rod (6)
Reliability.Wedge block (8) location feature in attached drawing 1 uses locating slide sleeve (26).Locating slide sleeve (26) is coated on connecting rod (6)
Outer surface, connect the left side section separated by wedge block (8) and right side section, keep the integral rigidity of connecting rod (6), meanwhile, even
Left side section/right side the section of extension bar (6) can be slided in the axial direction in locating slide sleeve (26), meet the job requirement of system,
Ensure the Assembly stability and functional reliability of connecting rod (6).
As shown in Fig. 2, there is brake disc (16) in the jaw of braking clamp body (3), there are friction plate in the both sides of brake disc (16)
(15), one is mounted on braking clamp body (3), and one is mounted on piston (14), and piston (14) is by sealing ring (13) mounted in braking
On caliper (3), there is larger frictional force between the contact surface of sealing ring (13) and piston (14), when the displacement of piston (14) is sealing
When enclosing in the regime of elastic deformation of (13), without relative motion between the contact surface of sealing ring (13) and piston (14).Piston (14)
Opposite side has nut (7), there is internal thread, with there is externally threaded screw rod (4) cooperation to install, between screw rod (4) and piston (14), with
And it is symmetrical arranged between screw rod (4) and braking clamp body (3) with connecting rod (6) hinge connection, connecting rod (6), nut (7) and worm gear
(24) it is fixedly connected, worm screw (25) connection motor shaft (11).Equipped with wedge-shaped regulating mechanism, wedge block (8) and rush in connecting rod (6)
It moves spring (5), connecting rod (6) is divided into two sections by wedge block (8), and the left side section and right side section, wedge block (8) of wedge block (8) will
Left side section and right side section are combined with one T-shape slot of location feature, and the left side section and right side section for making connecting rod (6) pass through wedge block
(8) it reliably links together, ensures the Assembly stability and functional reliability of connecting rod (6).Wedge block (8) can only be along actuating
Spring (5) actuates force direction movement.
During braking operation, motor (10) drives worm gear mechanism rotation, and nut (7) is driven to rotate, and screw rod (4) is connected
Bar (6) limits, and can not rotate, can only be moved along the axis direction of nut (7), nut (7) is mobile restricted in the axial direction, can not
It moves down, therefore, screw rod (4) moves up, and connecting rod (6) is driven to move, and braking clamp body (3) is pushed to move right, piston
(14) to left movement, i.e. piston (14) and braking clamp body (3) moves in the opposite direction, drives corresponding friction plate (15) from two
The braking effect of high efficient and reliable, to brake disc (16), is realized with identical forcing in side.Become at this point, elasticity occurs for sealing ring (13)
Without relative motion between the contact surface of shape, storage elastic potential energy, sealing ring (13) and piston (14).When releasing braking operation, motor
(10) worm gear mechanism is driven to rotate backward, nut (7) is driven to rotate backward, meanwhile, the elastic potential of sealing ring (13) storage
It can discharge, make piston (14) and braking clamp body (3) relative motion, all elements restore initial positions.
When friction plate (15) is worn, after thickness is thinning, during braking operation, motor (10) drives spiral shell by worm gear mechanism
Female (7) rotation, pushes piston (14) and braking clamp body (3) relative motion, when the elastic deformation amount of sealing ring (13) reaches maximum,
Due to friction plate (15) wear, braking effect is bad, at this time motor (10) driving nut (7) be rotated further, i.e., piston (14) and
Braking clamp body (3) continue relative motion, therefore, sealing ring (13) keep maximum flexibility deflection, and piston (14) overcome with it is close
Frictional force between seal (13) is matched with new contact surface with sealing ring (13), i.e., piston (14) is relative to braking clamp body
(3) displacement is more than the maximum flexibility deflection of sealing ring (13).When releasing braking, motor (10) drives worm gear mechanism anti-
Turn, nut (7) is driven to reversely rotate, meanwhile, the elastic potential energy release of sealing ring (13) makes piston (14) and braking clamp body (3)
Relative motion, sealing ring (13) and piston (14) are coordinated with new contact surface at this time positions, and bullet is actuated in wedge-shaped regulating mechanism
Spring (5) makes wedge block (8) be moved to small end, and the length of connecting rod (6) increases, size caused by compensate friction plate (15) abrasion
Variation, makes the maximum flexibility deflection that the return displacement of piston (14) and braking clamp body (3) is still sealing ring (13), therefore
It is identical with before abrasion to maintain brake clearance, realizes the adjust automatically of brake clearance.
When needing parking braking, make motor (10) that friction plate (15) be driven to compress brake disc (16), reach parking braking
It is required that the parking braking under motor (10) power blackout situation is realized using the Worm and worm-wheel gearing that reverse efficiency is zero.Or profit
Parking braking function is realized with lockable mechanism.Or the characteristics of using bolt and nut transmission reverse efficiency being zero, realizes parking system
It is dynamic.
In embodiment three represented by attached drawing 3, screw rod (4) is directly connected to using motor shaft (11), screw rod (4) is mounted on system
It in moving caliper (3), can only can not be moved axially around own axis, nut (7) is fitted on screw rod (4), connecting rod
(6) attaching nut (7) and piston (14), nut (7) can not be rotated by connecting rod (6) limitation, can only be along screw rod (4) axis direction
It is mobile.Wedge-shaped regulating mechanism in connecting rod (6) actuates spring (5) one end and wedge block (8) using a wedge block (8)
Small end is connected, and the other end is fixed in connecting rod (6).Location feature between wedge block (8) and connecting rod (6) is dovetail groove,
In addition, the shape of wedge block (8) is also different with the first two embodiment.During braking operation, motor shaft (11) rotation drives spiral shell
Bar (4) rotates, and moves down nut (7), piston (14) is pushed to move to left by connecting rod (6), meanwhile, screw rod (4) and braking
Caliper (3) moves right together, and corresponding friction plate (15) is driven to be forced from both sides with identical to brake disc (16), is realized high
Imitate reliable braking effect.At this point, flexible deformation occurs for sealing ring (13), elastic potential energy is stored.When releasing braking, motor (10)
Motor shaft (11) is driven to rotate backward, screw rod (4) is driven to rotate backward, meanwhile, the elastic potential energy release of sealing ring (13) storage,
Make piston (14) and braking clamp body (3) relative motion, all elements restore initial position.Parking braking, the braking of this structure
Other courses of work such as gap adjustment are identical with the first two embodiment, and which is not described herein again.
Here power input element (screw rod, nut) may be mounted on brake-caliper support in attached drawing 1, attached drawing 2, can also
On braking clamp body, when on braking clamp body, it should be noted that therefore the movement of braking clamp body be not limited, very
To there is movement interference, i.e. power input element has rational space relative to braking clamp body.
Transmission mechanism can also use chain drive, band in addition to using direct-drive, fixed axis gear mechanism, worm gear mechanism
Other kinds of drive such as transmission, lever drive, drag-line transmission, Planetary Gear Transmission, friction limiting device are removed using sealing ring, bullet
Other structures can also be used to be achieved similar function outside spring/snap ring, lockable mechanism can also act on lock pin
It is realized on other gears or with installing the modes such as ratchet and pawl arrangement on the special latch ratchet of gear one or on motor shaft
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 variation, the location feature of wedge block can also use boss, flat key etc. in addition to using T-shape slot, dovetail groove, locating slide sleeve
Other structures form, with reinforced assembly stability and functional reliability.Obviously, described embodiment is only the one of the present invention
Section Example, instead of all the embodiments, based on the embodiments of the present invention, one of ordinary skilled in the art is not having
There are other all embodiments for carrying out being obtained under the premise of creative work, belong to protection scope of the present invention.
The present invention is exemplarily described above in conjunction with attached 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 not improved direct application
In other occasions, within protection scope of the present invention.
Claims (10)
1. a kind of electric mechanical brake-by-wire device, comprising motor, transmission mechanism, screw rod, nut, connecting rod, 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 described
Brake disc both sides, one is mounted on the piston, and one is mounted on the braking clamp body；The piston is via institute
The friction limiting device stated is mounted on the braking clamp body；The friction limiting device part is fixedly mounted on described
Braking clamp body on, have larger frictional force between another part and the outer surface of piston, when the piston with it is described
When having relative displacement between braking clamp body, since frictional force effect makes to generate elastic potential energy in the friction limiting device；Institute
The input element of the transmission mechanism described in motor connection stated；Screw rod described in the final element connection of the transmission mechanism,
The screw rod has external screw thread, coordinates with the female nut；The screw rod can turn around own axes direction
It is dynamic, but along the mobile restricted of own axes direction；Nut between the nut and the piston, described with it is described
It is connected between braking clamp body using the connecting rod；The wedge-shaped regulating mechanism is mounted in the connecting rod, packet
Wedge block and actuation mean are included, when wedge block moves under actuation mean effect, the connection pole length can occur
Variation；The final element movement of the transmission mechanism, drives the screw rod to rotate, the nut is by the connecting rod
It influences, can not rotate, the screw rod described at this time can not be moved along own axes direction, therefore the nut can only be along described
The axis direction movement of screw rod, drives the connecting rod move, the braking clamp body and described described in connecting rod driving
Piston move in the opposite direction, drive the brake disc described in the friction plate from two side compressions；
During braking, the motor is rotated via the transmission mechanism driving screw rod, passes through bolt and nut driver
The structure driving nut movement, drives the connecting rod move, piston described in connecting rod driving and described
Braking clamp body moves in the opposite direction respectively, and the friction plate is made to be pressed on the brake disc both sides, obtains efficiently may be used
At this point, having relative displacement between the piston and the braking clamp body, dress is limited in the friction for the braking effect leaned on
Put interior generation elastic potential energy；When releasing braking, the motor is reversed via the transmission mechanism driving screw rod
Movement, meanwhile, the elastic potential energy effect inside the friction limiting device makes the piston and the braking clamp body phase
To movement, restore initial position, also corresponding sports are restored to initial position to the screw-and-nut mechanism；
When the friction plate have abrasion, thickness it is thinning after, during braking operation, the motor drives via the transmission mechanism
The screw rod rotation is moved, makes the piston and the braking clamp body relative motion, bullet in the friction limiting device
Property potential energy reach maximum, since friction plate is thinning, braking effect is bad, and the motor described at this time works on, and drives described
Screw rod is rotated further, and is overcome the frictional force between the outer surface of the piston and the friction limiting device, is made described
Piston and the braking clamp body continue to relatively move, and compress brake disc, obtain reliable efficient braking effect；Release braking
When, screw rod counter motion of the motor described in via the transmission mechanism driving, while the friction limiting device
Interior elastic potential energy effect, makes the piston and the braking clamp body relative motion, the piston described at this time with it is described
Friction limiting device is relatively fixed with new contact position, therefore the piston and the braking clamp body are when releasing braking
Return displacement be less than displacement during braking operation, the motor described at this time drives the screw-and-nut mechanism anti-
During moving to be restored to initialization position, the wedge-shaped regulating mechanism work in the connecting rod
Make, the actuation mean driving wedge block movement changes the connection pole length, to meet the friction
The adjust automatically of brake clearance is realized in size requirement after pad wear.
2. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that be additionally included in the screw rod
Using cycle spherical structure between the nut, to reduce frictional resistance, system working efficiency is improved.
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
In the connecting rod can self-locking, i.e., along the pitman shaft to pressing force can not make the wedge block relative to institute
The connecting rod movement stated.
A kind of 4. electric mechanical brake-by-wire device according to claim 1, it is characterised in that the connecting rod size phase
Together, it is symmetrical arranged.
5. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that further include the driver
The final element connection of the structure nut, the nut can be rotated around own axes direction, but along own axes direction
It is mobile restricted；The nut has internal thread, with there is the externally threaded screw rod to coordinate；The screw rod with it is described
It is connected between screw rod and the braking clamp body between piston, described using the connecting rod；The transmission mechanism
Final element movement, drive the nut rotation, the screw rod is influenced by the connecting rod, can not be rotated, at this time
The nut can not be moved along own axes direction, therefore the screw rod can only be moved along the axis direction of the nut
It is dynamic, the connecting rod is driven to move, the connecting rod drives the braking clamp body and the piston to opposite side
To movement, the brake disc described in the friction plate from two side compressions is driven；That is, the screw rod, the nut, two elements
The frame mode of exchange function.
6. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that when the transmission mechanism or
During 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
It disconnects, actuated element during power-off in fixed conveyor link, keeps 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, the lockable mechanism can be utilized to realize parking braking, can also be zero using reverse efficiency, power and fortune
It is dynamic can not back transfer, realize the parking braking under the motor power blackout situation.
A kind of 7. electric mechanical brake-by-wire device according to claim 1 or claim 5, it is characterised in that the company
Connection between extension bar and the screw/nut/piston/braking clamp body, can pass through the connecting rod and the spiral shell
Change in location when relative motion between bar/nut/piston/braking clamp body meets brake operation between component, can also lead to
The flexible deformation for crossing junction between the connecting rod and the screw/nut/piston/braking clamp body meets brake work
Change in location when making between component.
8. a kind of electric mechanical brake-by-wire device according to claim 1 or claim 5, it is characterised in that further include with
Power input element (the spiral shell in screw rod or claim 5 in claim 1 of the final element connection of the transmission mechanism
It is female) on the braking clamp body, only in the power output element (spiral shell in nut or claim 5 in claim 1
Bar) connecting rod is set between the piston；Or the power being connect with the final element of the transmission mechanism
Input element (nut in screw rod or claim 5 in claim 1) is on the piston, only in power output
Element (screw rod in nut or claim 5 in claim 1) sets the connection between the braking clamp body
These four frame modes of bar.
9. a kind of electric mechanical brake-by-wire device according to claim 8, it is characterised in that be additionally included in the piston
With using roller structure in the mating surface of the braking clamp body, to reduce frictional resistance, system working efficiency is improved.
10. according to claim 1 or a kind of electric mechanical brake-by-wire device according to any one of claims 8, it is characterised in that described
The connecting rod is divided into left side section and right side section by wedge block, and it is fixed that the junction of the wedge block and the connecting rod has
Position feature, the left side section and right side section for making the connecting rod are reliably linked together by the wedge block, described
Left side section can only move in the axial direction relative to the right side section, the relative motion in other directions can not occurs, described
Wedge block can only move in the connecting rod along the force direction that actuates of the actuation mean, can not realize other directions
Mobile or rotation, to improve Assembly stability and functional reliability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810024718.2A CN108194535B (en) | 2018-01-03 | 2018-01-03 | Electronic mechanical brake-by-wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810024718.2A CN108194535B (en) | 2018-01-03 | 2018-01-03 | Electronic mechanical brake-by-wire |
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| CN108194535A true CN108194535A (en) | 2018-06-22 |
| CN108194535B CN108194535B (en) | 2022-04-22 |
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| CN201810024718.2A Active CN108194535B (en) | 2018-01-03 | 2018-01-03 | Electronic mechanical brake-by-wire |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701215A (en) * | 2019-09-29 | 2020-01-17 | 哈尔滨哈飞航空工业有限责任公司 | Electric control electric rotor wing braking system |
| CN114312710A (en) * | 2021-07-20 | 2022-04-12 | 华为数字能源技术有限公司 | Parking mechanism, EMB system and vehicle |
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| CN108194535B (en) | 2022-04-22 |
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