CN207777460U - 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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- CN207777460U CN207777460U CN201721308157.6U CN201721308157U CN207777460U CN 207777460 U CN207777460 U CN 207777460U CN 201721308157 U CN201721308157 U CN 201721308157U CN 207777460 U CN207777460 U CN 207777460U
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Abstract
The utility model is related to a kind of electric mechanical brake-by-wire device, including motor, transmission mechanism, one-way clutch, screw rod, nut piston, friction limiting devices etc..Motor drives one-way clutch rotation by transmission mechanism, one-way clutch, which combines, drives nut rotation, piston and braking clamp body are respectively driven by thread transmission to move in the opposite direction, and friction plate is compressed from brake disc both sides with identical power, realizes efficient braking effect.The utility model is simple in structure, reliable operation, and braking efficiency is high, can automatically adjust brake clearance, and compensates since influence, the design of simplified control system can be used for service brake and parking braking caused by friction disc wear.
Description
Technical field
The utility model is related to brake fields, existing floating caliper type disc liquid braking device can be specifically replaced, with electricity
The mode of control machinery realizes that friction plate clamps brake disc from both sides with identical pressure, while it is adjustable to may be implemented brake clearance,
The adjustable line traffic control mechanical brake of severity of braking, 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
It is realized for automobile by the information control motor work of control system receiving sensor by machinery 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 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 cause brake actuator efficiency change indefinite problem, to brake efficiency control bring certain difficulty.Together
When, the problems such as that there are structures is more complicated for most of brake, and installation dimension is larger.
Invention content
The purpose of this utility model is that proposing a kind of electric mechanical brake-by-wire device.The utility model has structure letter
The advantages that list, reliable operation, the automatic adjustment of brake clearance can be realized, by detecting the displacement of friction plate driving mechanism or turning
Angle, you can conversion obtains braking clamping force size, to enable the corresponding simplification of control system.
Realize that the technical solution of the utility model aim is as follows：
A kind of electric mechanical brake-by-wire device, including motor, transmission mechanism, one-way clutch, screw rod, nut, piston rub
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；The friction limiting device part is fixedly mounted on the caliper
On body, another part has larger frictional force with the piston space, has when between the piston and the braking clamp body
When relative displacement, since friction 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；One-way clutch described in the final element connection of the transmission mechanism, the list
The nut described to clutch connection, the nut is mounted on the piston, can be rotated around own axes direction, along certainly
The movement in body axis direction is limited by the piston；The screw rod is fixedly mounted on the braking clamp body, and described
Nut location it is corresponding；The screw rod coordinates with the nut；The final element of the transmission mechanism moves, described
One-way clutch when combining, drive the nut rotation, pass through thread transmission the driving braking clamp body and institute
The piston stated moves in the opposite direction, drives the friction plate from the brake disc described in two side compressions；
When braking, the motor is moved via the transmission mechanism driving one-way clutch, described at this time
One-way clutch combine, drive the nut rotation, be fixedly mounted on due to the screw rod on the braking clamp body,
It can not rotate, therefore the nut rotation drives the piston and the braking clamp body to transport in the opposite direction respectively
It is dynamic, so that the friction plate is pressed on the brake disc both sides, the braking effect of high efficient and reliable is obtained, at this point, the work
There is relative displacement between plug and the braking clamp body, elastic potential energy is generated in the friction limiting device；It is made when releasing
When dynamic, for the motor via the transmission mechanism driving one-way clutch counter motion, described at this time is unidirectional
Clutch separation, the elastic potential energy effect inside the described friction limiting device, makes the piston and the braking clamp body
Relative motion restores initial position, and the nut is rotated to adapt to the phase of the piston and the braking clamp body at this time
To movement；
When the friction plate have abrasion, thickness it is thinning after, when braking operation, the motor is via the driver
The structure driving one-way clutch combines, and drives the nut rotation, makes the piston and the braking clamp body phase
To movement, elastic potential energy reaches maximum in the friction limiting device, and since friction plate is thinning, braking effect is bad, at this time
The motor works on, and the nut is driven to be rotated further, and overcomes the piston and the friction limiting device
Between frictional force, make the piston and the braking clamp body continue to relatively move, compress brake disc, obtain it is reliable efficiently
Braking effect；When releasing braking, the elastic potential energy effect in the described friction limiting device makes the piston and described
Braking clamp body relative motion, the piston described at this time are relatively fixed with the friction limiting device with new contact position, reality
The adjust automatically of existing brake clearance.
Further include, to reduce frictional resistance, being improved using cycle spherical structure between the nut and the screw rod
System working efficiency.
Further include increasing transmission system between the one-way clutch and the nut.
Further include using roller mechanism in the position that the piston is connect with the nut, to reduce frictional resistance.
When the transmission link for being zero without reverse efficiency in the transmission mechanism or the transmission system, using locking machine
Structure realizes that the parking braking under the motor power blackout situation, the lockable mechanism use electromagnetic brake or electric-controlled mechanical system
Dynamic device, can be disconnected when being powered, power-off when fixed conveyor link in actuated element, keep the friction plate and described
Brake disc between pressure size, realize parking braking function；It is arranged when in the transmission mechanism or the transmission system
When having the transmission link that reverse efficiency is zero, the lockable mechanism can be utilized to realize parking braking, reverse efficiency can also be utilized
Be zero, power and movement can not back transfer, realize the parking braking under the motor power blackout situation.
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 utility model.
Fig. 2 is a kind of A direction views of the embodiment one of electric mechanical brake-by-wire device of the utility model.
Fig. 3 is a kind of front view of the embodiment two of electric mechanical brake-by-wire device of the utility model.
Explanation is marked in attached drawing：1- brake-caliper support 2- guide pin 3- braking clamp body 4- plain thrust bearing 5- spiral shells
Bar 6- worm gear 7- one-way clutch 8- worm screw 9- sealing ring 10- motor 11- piston 12- friction plate 13- brake discs
14- motor shaft 15- electromagnetic brake 16- primary drive gear 17- spring 18- snap rings 19-primary driven gear 20-
21- grade driven gear 22- electromagnetic coil 23- 24-return spring of lock pin 25- nuts 26- of secondary driving gear to
Mandrel is held.
Specific implementation mode
Refer to the attached drawing 1 and attached drawing 2, are described in detail one embodiment of the utility model.
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) there are friction plate (12) in both sides, and one is mounted on braking clamp body (3), and one is mounted on piston (11), and piston (11) passes through
Sealing ring (9) has larger frictional force between sealing ring (9) and the contact surface of piston (11), works as piston on braking clamp body (3)
(11) when displacement is in the regime of elastic deformation of sealing ring (9), without opposite fortune between sealing ring (9) and the contact surface of piston (11)
It is dynamic.There is hole in the other side of piston (11), and nut (25) is equipped in hole, has between nut (25) and the hole of piston (11) flat
Face thrust bearing (4) and radial bearing (26), to reduce friction loss.Nut (25) coordinates with screw rod (5), and screw rod (5) is fixed
On braking clamp body (3).The outer surface of nut (25) is connect by one-way clutch (7) with worm gear (6), with worm gear (6)
The worm screw (8) of cooperating is driven by motor (10).
When braking operation, motor (10) drives worm screw (8) and worm gear (6) rotation, and one-way clutch (7) combines at this time, band
Dynamic nut (25) rotation, since screw rod (5) is fixedly mounted on braking clamp body (3), can not rotate, therefore turn of nut (25)
It is dynamic that piston (11) and nut (25) is made to move downward, meanwhile, screw rod (5) and braking clamp body (3) move right, i.e., piston (11) and
Braking clamp body (3) moves in the opposite direction, and corresponding friction plate (12) is driven to be forced from both sides to brake disc with identical
(13), the braking effect of high efficient and reliable is realized.At this point, flexible deformation occurs for sealing ring (9), elastic potential energy, sealing ring (9) are stored
Without relative motion between the contact surface of piston (11).When releasing braking operation, motor (10) drives worm gear mechanism reversely to turn
Dynamic, at this point, one-way clutch (7) detaches, nut (25) is in free state, and the elastic potential energy of sealing ring (9) storage discharges,
Make piston (11) and braking clamp body (3) relative motion, drives reversed under elastic potential energy effect of the nut (25) in sealing ring (9)
Rotation, all elements restore initial position.
When friction plate (12) are worn, after thickness is thinning, when braking operation, motor (10) pass through worm gear mechanism drive it is single
It is combined to clutch (7), driving nut (25) rotates, and pushes piston (11) and braking clamp body (3) relative motion, sealing ring (9)
Elastic deformation amount when reaching maximum, since friction plate (12) are worn, braking effect is bad, and motor (10) continues through at this time
In conjunction with one-way clutch (7) driving nut (25) rotate, i.e., piston (11) and braking clamp body (3) continuation relative motion, therefore,
Sealing ring (9) keeps maximum flexibility deflection, and piston (11) overcomes the frictional force between sealing ring (9), with new contact
Face is matched with sealing ring (9), i.e., piston (11) is more than the maximum flexibility of sealing ring (9) relative to the displacement of braking clamp body (3)
Deflection.When releasing braking, motor (10) drives worm gear mechanism reversion, one-way clutch (7) to detach, sealing ring (9)
Elastic potential energy discharges, and makes piston (11) and braking clamp body (3) relative motion, drives nut (25) to reversely rotate, at this time sealing ring
(9) and piston (11) coordinates positioning with new contact surface, and return displacement is still the maximum flexibility deflection of sealing ring (9),
Therefore it is identical as before abrasion to maintain brake clearance, realizes the adjust automatically of brake clearance.
When the transmission reverse efficiency of worm screw (8) and worm gear (6) is zero, it can make motor (10) that friction plate (12) be driven to compress
After reaching parking braking requirement, motor (10) power blackout situation is realized using the self-locking function of worm gear mechanism for brake disc (13)
Under parking braking.
Another embodiment of the utility model is described in refer to the attached drawing 3.
The embodiment of attached drawing 3 and the embodiment main distinction of attached drawing 1 are as follows：
Transmission mechanism is different, is driven using worm gear mechanism in attached drawing 1, and worm gear (6) is the final element of transmission mechanism,
One-way clutch (7) is mounted between worm gear (6) and nut (25)；Two-stage gear drive, secondary driven gear are used in attached drawing 3
(21) it is the final element of transmission mechanism, one-way clutch (7) is mounted between secondary driven gear (21) and nut (25).
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, directly
The parking braking under motor (10) power blackout situation may be implemented；In attached drawing 3, illustrate that the when of being powered using electromagnetic brake (15) is released
Discharge arbor (14), and locking motor shaft (14) realizes the parking braking mode under motor (10) power blackout situation when power-off, is also represented by
Using the parking braking mode of electric-controlled mechanical brake apparatus, when electromagnetic coil (22) is powered, lock pin (23) is by electromagnetism masterpiece
With, compression retracteding position spring (24), lock pin (23) is made to be not in contact with each other with secondary driven gear (21), braking to brake or released
Put no any influence；When needing parking braking, motor (10) drives friction plate (12) to compress brake disc (13), reaches parking
Brake request, then electromagnetic coil (22) power off, lock pin (23) return spring (24) elastic force effect it is lower be inserted into secondary from
In the tooth of moving gear (21), parking braking effect is kept, you can realize the parking braking function under motor (10) 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 both 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 in caliper by snap ring (18)
On body (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.Have larger frictional force between snap ring (18) and the contact surface of piston (11), when piston (11) displacement spring (17) bullet
When in property deformation range, without relative motion between snap ring (18) and the contact surface of piston (11).There is hole in the other side of piston (11),
Nut (25) is installed in hole, there is plain thrust bearing (4) and radial bearing between nut (25) and the hole of piston (11)
(26), to reduce friction loss.Nut (25) coordinates with screw rod (5), and screw rod (5) is fixedly mounted on braking clamp body (3).Nut
(25) outer surface is connect by one-way clutch (7) with secondary driven gear (21), secondary driven gear (21), secondary active
Gear (20), primary driven gear (19) constitute two-stage gear reduction, primary drive gear with primary drive gear (16)
(16) it is fixedly mounted on motor shaft (14).
When braking operation, motor (10) drives one-way clutch (7) to combine by two-stage gear reduction, drives nut
(25) it rotates, pushes piston (11) and braking clamp body (3) to move in the opposite direction, drive corresponding friction plate (12) from two
Side is forced with identical to brake disc (13), realizes the braking effect of high efficient and reliable.At this point, snap ring (18) and piston (11) are together
Mobile, flexible deformation occurs for compressed spring (17), spring (17), stores elastic potential energy, the contact of snap ring (18) and piston (11)
Without relative motion between face.When releasing braking operation, motor (10) drives two-stage gear reduction to rotate backward, at this point, unidirectionally
Clutch (7) detaches, and nut (25) is in free state, and the elastic potential energy release of spring (17) storage makes piston (11) and system
Moving caliper (3) relative motion drives and is reversely rotated under elastic potential energy effect of the nut (25) in spring (17), and all elements are extensive
Multiple initial position.
When friction plate (12) are worn, after thickness is thinning, when braking operation, motor (10) passes through two-stage gear reduction band
Dynamic one-way clutch (7) combines, and driving nut (25) rotates, and pushes piston (11) and braking clamp body (3) relative motion, spring
(17) elastic deformation amount reaches maximum, and snap ring (18) is close to when on the step surface of left side, since friction plate (12) are worn, system
Dynamic ineffective, motor (10) drives nut (25) to be rotated further by the one-way clutch (7) of combination at this time, i.e. piston (11)
Continue relative motion with braking clamp body (3), therefore, spring (17) keeps maximum flexibility deflection, and piston (11) overcomes and blocks
Frictional force between ring (18) is matched with new contact surface with snap ring (18).When releasing braking, motor (10) drives two-stage tooth
The reversion of deceleration mechanism, one-way clutch (7) separation are taken turns, the elastic potential energy release of spring (17) makes piston (11) and braking clamp body
(3) relative motion drives nut (25) to rotate, and snap ring (18) and piston (11) coordinate positioning, return with new contact surface at this time
Displacement is still the maximum flexibility deflection of spring (17), thus maintain brake clearance and abrasion before it is identical, realize system
The adjust automatically in dynamic gap.
When needing parking braking, makes motor (10) that friction plate (12) be driven to compress 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.When electromagnetic brake (15) is powered, motor shaft (14) is discharged, at this time braking moment
Size can freely be controlled by motor (10).Or electric-controlled mechanical brake apparatus is used, when energization, electromagnetic coil (22) makes locking
(23) return is sold, when power-off, lock pin (23) is inserted into the tooth of secondary driven gear (21), realizes motor (10) power blackout situation
Under parking braking function.
In this embodiment, electric-controlled mechanical brake apparatus can also act 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 the embodiment of attached drawing 3, one-way clutch (7) can also be arranged in primary driven gear (19), or primary
In driving gear (16), or in secondary driving gear (20)；In the embodiment of attached drawing 1 and attached drawing 2, one-way clutch (7) is also
It can be arranged in worm screw (8), above structure scheme also belongs to one of content to be protected needed for the utility model.
Transmission mechanism can also use chain drive, 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 is in addition to using sealing ring, spring/snap ring
Other structures can also be used to be achieved similar function, lockable mechanism can also act on lock pin on other gears
Or on the special latch ratchet of gear one, or the modes such as ratchet and pawl arrangement is installed on motor shaft and realize latch functions.
Obviously, described embodiment is only a part of the embodiment of the utility model, instead of all the embodiments, is based on this reality
With the embodiment in novel, one of ordinary skilled in the art obtained under the premise of no progress creative work its
His all embodiments, belong to the scope of protection of the utility model.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, if the various improvement of the methodology and technical solution progress of the utility model are used, or without
Improvement directly applies to other occasions, both is within the protection scope of the present invention.
Claims (5)
1. a kind of electric mechanical brake-by-wire device, including motor, transmission mechanism, one-way clutch, screw rod, nut, piston, friction
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；The friction limiting device part is fixedly mounted on the caliper
On body, another part has larger frictional force with the piston space, has when between the piston and the braking clamp body
When relative displacement, since friction 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；One-way clutch described in the final element connection of the transmission mechanism, the list
The nut described to clutch connection, the nut is mounted on the piston, can be rotated around own axes direction, along certainly
The movement in body axis direction is limited by the piston；The screw rod is fixedly mounted on the braking clamp body, and described
Nut location it is corresponding；The screw rod coordinates with the nut；The final element of the transmission mechanism moves, described
One-way clutch when combining, drive the nut rotation, pass through thread transmission the driving braking clamp body and institute
The piston stated moves in the opposite direction, drives the friction plate from the brake disc described in two side compressions；
When braking, the motor is moved via the transmission mechanism driving one-way clutch, at this time the list
It is combined to clutch, drives the nut rotation, be fixedly mounted on due to the screw rod on the braking clamp body, it can not
Rotation, therefore the nut rotation drives the piston and the braking clamp body to move in the opposite direction respectively, makes
The friction plate is pressed on the brake disc both sides, the braking effect of high efficient and reliable is obtained, at this point, the piston and institute
There is relative displacement between the braking clamp body stated, elastic potential energy is generated in the friction limiting device；When releasing braking, institute
The motor stated divides via the transmission mechanism driving one-way clutch counter motion, the at this time one-way clutch
From, the elastic potential energy effect inside the friction limiting device makes the piston and the braking clamp body relative motion,
Restore initial position, the nut is rotated to adapt to the relative motion of the piston and the braking clamp body at this time；
When the friction plate have abrasion, thickness it is thinning after, when braking operation, the motor drives via the transmission mechanism
It moves the one-way clutch to combine, drives the nut rotation, make the piston and the opposite fortune of the braking clamp body
Dynamic, elastic potential energy reaches maximum in the friction limiting device, and since friction plate is thinning, braking effect is bad, described at this time
Motor work on, drive the nut to be rotated further, overcome 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 system
Dynamic effect；When releasing braking, the elastic potential energy effect in the friction limiting device makes the piston and the braking
Caliper relative motion, the piston described at this time are relatively fixed with the friction limiting device with new contact position, and realization is made
The adjust automatically in dynamic gap.
2. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that further include in the nut
System working efficiency is improved to reduce frictional resistance using cycle spherical structure between the screw rod.
3. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that further include described unidirectional
Increase transmission system between clutch and the nut.
4. a kind of electric mechanical brake-by-wire device according to claim 1, it is characterised in that further include in the piston
The position being connect with the nut uses roller mechanism, to reduce frictional resistance.
5. a kind of electric mechanical brake-by-wire device according to claim 1 or claim 3, it is characterised in that when described
When the transmission link for being zero without reverse efficiency in transmission mechanism or the transmission system, the motor is realized using lockable mechanism
Parking braking under power blackout situation, the lockable mechanism use electromagnetic brake or electric-controlled mechanical brake apparatus, can be logical
Actuated element when disconnecting, powering off when electric in fixed conveyor link, keeps pressure between the friction plate and the brake disc
Size, realize parking braking function；It is zero when being provided with reverse efficiency in the transmission mechanism or the transmission system
When transmission link, the lockable mechanism can be utilized to realize parking braking, can also be zero using reverse efficiency, power and movement
Can not back transfer, realize the parking braking under the motor power blackout situation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721308157.6U CN207777460U (en) | 2017-09-26 | 2017-09-26 | A kind of electric mechanical brake-by-wire device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721308157.6U CN207777460U (en) | 2017-09-26 | 2017-09-26 | A kind of electric mechanical brake-by-wire device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207777460U true CN207777460U (en) | 2018-08-28 |
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ID=63219469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721308157.6U Active CN207777460U (en) | 2017-09-26 | 2017-09-26 | A kind of electric mechanical brake-by-wire device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207777460U (en) |
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2017
- 2017-09-26 CN CN201721308157.6U patent/CN207777460U/en active Active
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