CN107461428B - A kind of automobile brake-by-wire device and control method - Google Patents
A kind of automobile brake-by-wire device and control method Download PDFInfo
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- CN107461428B CN107461428B CN201710505844.5A CN201710505844A CN107461428B CN 107461428 B CN107461428 B CN 107461428B CN 201710505844 A CN201710505844 A CN 201710505844A CN 107461428 B CN107461428 B CN 107461428B
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- piston
- braking
- screw rod
- way clutch
- 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
- 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
- F16D55/2262—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 the axial movement being guided by open sliding surfaces, e.g. grooves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
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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
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for 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
- 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
- F16D65/54—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment
-
- 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
- F16D2121/14—Mechanical
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to a kind of automobile brake-by-wire device and control method, including motor, transmission mechanism, one-way clutch, screw rod, piston, friction limiting devices etc..Motor drives the outer ring of one-way clutch to rotate by transmission mechanism, one-way clutch drives screw rod 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 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 automobile brake-by-wire device and control method.
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 system
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
Part brake often lacks the function of brake clearance automatic adjustment, makes brake in external environmental change and friction disc wear
In the case where cause brake actuator efficiency change indefinite problem, thus 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.
Summary of the invention
It is an object of the invention to propose a kind of automobile brake-by-wire device and control method.The present invention has structure simple,
The advantages that reliable operation, can be realized the automatic adjustment of brake clearance, by detecting displacement or the corner of friction plate driving mechanism,
It can convert and obtain 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:
It include motor, transmission mechanism, one-way clutch, screw rod, piston, friction limit equipped with a kind of automobile brake-by-wire device
Position device, piston positioning means, braking clamp body, brake disc, friction plate；The screw rod includes thread segment and cylindrical section, described
Screw rod bearings on the braking clamp body, the screw rod is in the axial direction without opposite between the braking clamp body
Movement；The friction plate has two panels, is arranged symmetrically in the brake disc two sides, and one is mounted on the piston, and one
It is a to be mounted on the braking clamp body；The piston is mounted on the braking clamp body via the friction limiting device
On, the piston positioning means move back and forth piston can only in axis direction, can not rotate；In the internal piston has
Screw thread is matched with the screw flight section；The cylindrical section outer surface of the screw rod is as the one-way clutch
Inner ring, the outer ring of the one-way clutch is fixedly connected with the final element of the transmission mechanism；The driver
The final element of structure moves, and the one-way clutch outer ring is driven to rotate, and one-way clutch combines, and the screw rod is driven to revolve
When turning, the piston is mobile, and the braking clamp body and the screw rod are mobile to the direction opposite with the piston, band
The friction plate is moved from brake disc described in two side compressions；The input element of the motor connection transmission mechanism；
Described friction limiting device a part is fixedly mounted on the braking clamp body, another part and the outer surface of piston
Between have biggish frictional force, when having relative displacement between the piston and the braking clamp body, due to frictional force act on
Make to generate elastic potential energy in the friction limiting device；
When braking, the motor is moved via the transmission mechanism driving one-way clutch outer ring, unidirectionally
Clutch combines, and the screw rod is driven to rotate, and drives the piston and the braking clamp body difference in the opposite direction
Movement makes the friction plate be pressed on the brake disc two sides, the braking effect of high efficient and reliable is obtained, at this point, described
There is relative displacement between piston and the braking clamp body, generates elastic potential energy in the friction limiting device；Work as releasing
When braking, the motor one-way clutch outer ring counter motion described via the transmission mechanism driving, one-way clutch
Device separates, and the elastic potential energy effect inside the friction limiting device keeps the piston and the braking clamp body opposite
Movement restores initial position, and the screw rod is rotated to adapt to the opposite fortune of the piston and the braking clamp body at this time
It is dynamic；
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 screw rod to rotate, 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 screw rod is driven to continue to rotate, and overcomes the outer surface of the piston and the friction
Frictional force between limiting device makes the piston and the braking clamp body continue to relatively move, and compresses brake disc, obtains
Reliable efficient braking effect；When releasing braking, the elastic potential energy in the friction limiting device is acted on, and makes the piston
With the braking clamp body relative motion, the piston and the friction limiting device are opposite with new contact position at this time
It is fixed, realize the adjust automatically of brake clearance.
It further include using circulation spherical structure between the internal screw thread of the screw rod and the piston, to reduce friction resistance
Power improves system working efficiency.
It further include increasing transmission system between the one-way clutch and the screw rod.
It further include by the inner ring of the final element connection of the transmission mechanism one-way clutch, the screw rod
The outer ring of the connection one-way clutch, when braking operation, the one-way clutch is combined, described when releasing braking
One-way clutch separation.
When the transmission link for being zero without reverse efficiency in the transmission mechanism or the transmission system, using locking machine
Structure realizes the parking braking under the motor power blackout situation, and the lockable mechanism uses electromagnetic brake or electric-controlled mechanical system
Dynamic device can be disconnected when being powered, actuated element when power-off in fixed conveyor link, 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, 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 braking under the motor power blackout situation.
A kind of automobile brake-by-wire device control method, which is characterized in that described when comprising the steps of: braking operation
Motor drives the transmission mechanism work, and the one-way clutch combines, drives the screw rod to rotate, drive described
Piston and the braking clamp body are mobile, the brake disc two sides for keeping the friction plate compression described, described in electronic control unit detection
The rotation information of screw rod calculate braking clamping force in conjunction with the size of current of the motor；When the friction disc wear
When, the electronic control unit control motor rotation is to compensate influence caused by abrasion.
Detailed description of the invention
Fig. 1 is a kind of main view of the embodiment one of automobile brake-by-wire device of the invention.
Fig. 2 is a kind of A direction view of the embodiment one of automobile brake-by-wire device of the invention.
Fig. 3 is a kind of main view of the embodiment two of automobile brake-by-wire device of the invention.
Fig. 4 is a kind of main view of the embodiment three of automobile brake-by-wire device of the invention.
Explanation: 1- brake-caliper support 2- guide pin 3- braking clamp body 4- target disc 5- screw rod (5A: cylinder is marked in attached drawing
Section, 5B: thread segment) 6- worm gear 7- one-way clutch 8- worm screw 9- sealing ring 10- dive key 11- piston 12- friction
Piece 13- brake disc 14- motor 15- sensor 16- cylindrical roller 17- spring 18- snap ring 19- motor shaft 20- electromagnetism
The brake 21- primary drive gear 22- primary grade driven gear of grade driving gear 24- times of driven gear 23- times 25- electricity
Magnetic coil 26- return spring 27- lock pin 28- tapered roller bearing
Specific embodiment
With reference to attached drawing 1 and attached drawing 2, one embodiment of the present of invention is described in detail.
As depicted in figs. 1 and 2, a kind of automobile brake-by-wire device includes a braking that can be moved on guide pin (2)
Caliper (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) passes through
On braking clamp body (3), dive key (10) makes piston (11) can only be in the axial direction for dive key (10) and sealing ring (9)
It is mobile, it is not able to rotate, has biggish frictional force between sealing ring (9) and the contact surface of piston (11), when the displacement of piston (11) exists
When in the regime of elastic deformation of sealing ring (9), without relative motion between sealing ring (9) and the contact surface of piston (11).Screw rod (5) is logical
It crosses tapered roller bearing (28) to be supported on braking clamp body (3), screw rod (5) includes two sections, and one section is thread segment (5B), and one section is
Cylindrical section (5A).Friction plate (12) are installed in one end of piston (11), and the other end has internal screw thread, the thread segment (5B) with screw rod (5)
Cooperation.Inner ring of the cylindrical section (5A) of screw rod (5) as one-way clutch (7), the outer ring of one-way clutch (7) and worm and gear
Worm gear (6) in transmission mechanism is fixedly connected, and worm screw (8) is connected with the output shaft of motor (14).
When braking operation, motor (14) drives worm screw (8) rotation, drives worm gear (6) underdrive, at this time one-way clutch
(7) it combines, drives screw rod (5) rotation, since piston (11) can not rotate, drive screw rod when one-way clutch (7) combine
(5) rotate when, piston (11) and braking clamp body (3) move in the opposite direction, drive corresponding friction plate (12) from two sides with
It is identical to force to brake disc (13), realize the braking effect of high efficient and reliable.At this point, flexible deformation, storage occur for sealing ring (9)
Elastic potential energy, without relative motion between sealing ring (9) and the contact surface of piston (11).When releasing braking operation, motor (14) is driven
Worm screw (8) rotates backward, and driving worm gear (6) also rotates backward, at this point, one-way clutch (7) separates, screw rod (5) is in freely
State, the elastic potential energy release of sealing ring (9) storage, makes piston (11) and braking clamp body (3) relative motion, drives screw rod (5)
It is reversely rotated under the elastic potential energy effect in sealing ring (9), all elements restore initial position.
When friction plate (12) are worn, after thickness is thinning, when braking operation, motor (14) passes through worm screw (8), worm gear (6) band
Dynamic one-way clutch (7) combine, and driving screw rod (5) rotation pushes piston (11) and braking clamp body (3) relative motion, sealing ring
(9) when elastic deformation amount reaches maximum, since friction plate (12) are worn, braking effect is bad, and motor (14) continues to lead at this time
Cross one-way clutch (7) driving screw rod (5) rotation combined, i.e. piston (11) and braking clamp body (3) continues relative motion, because
This, sealing ring (9) keeps maximum flexibility deflection, and piston (11) overcomes the frictional force between sealing ring (9), is connect with new
Contacting surface is matched with sealing ring (9), i.e., piston (11) relative to braking clamp body (3) displacement be greater than sealing ring (9) maximum bullet
Property deflection.When releasing braking, motor (14) drives worm gear mechanism reversion, one-way clutch (7) separation, sealing ring (9)
Elastic potential energy release, make piston (11) and braking clamp body (3) relative motion, drive screw rod (5) to rotate, at this time sealing ring (9)
Positioning is cooperated with new contact surface with piston (11), 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.
It, can be after motor (14) be powered and reach parking braking effect when the reverse efficiency of worm screw (8) and worm gear (6) is zero
The parking braking under motor (14) power blackout situation is realized in power-off using the self-locking function of worm gear mechanism.
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:
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,
One-way clutch (7) is mounted between worm gear (6) and screw rod (5)；Two-stage gear drive, secondary driven gear are used in attached drawing 3
It (24) is the final element of transmission mechanism, one-way clutch (7) is mounted between secondary driven gear (24) and screw rod (5).
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.
Piston positioning means are different, be axially moveable piston (11) can only using dive key (10) in attached drawing 1, can not
Rotation；Piston (11) is axially moveable can only using cylindrical roller (16) in attached drawing 3, can not be rotated.
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 (14) power blackout situation may be implemented；In attached drawing 3, motor is discharged when being powered using electromagnetic brake (20)
Axis (19), locking motor shaft (19) realizes the parking braking under motor (14) power blackout situation when power-off.
As shown in figure 3, a kind of automobile brake-by-wire device includes a braking clamp body that can be moved on guide pin (2)
(3), guide pin (2) is fixed on brake-caliper support (1).Have in the jaw of braking clamp body (3) brake disc (13), brake disc (13)
Two sides have friction plate (12), one on braking clamp body (3), one on piston (11), piston (11) passes through cylinder
On braking clamp body (3), snap ring (18) is pushed to one far from brake disc (13) by spring (17) for roller (16) and snap ring (18)
Side, spring (17) are mounted on braking clamp body (3).Cylindrical roller (16) move piston (11) can only in the axial direction, cannot
Rotation, has biggish frictional force between snap ring (18) and the contact surface of piston (11), when the displacement of piston (11) is in spring (17)
When in regime of elastic deformation, without relative motion between snap ring (18) and the contact surface of piston (11).Screw rod (5) passes through taper roller axis
It holds (28) to be supported on braking clamp body (3), screw rod (5) includes two sections, and one section is thread segment (5B), and one section is cylindrical section (5A).
Friction plate (12) are installed in one end of piston (11), and the other end has internal screw thread and the thread segment (5B) of screw rod (5) to be coupled.Screw rod
(5) inner ring of the cylindrical section (5A) as one-way clutch (7), the outer ring of one-way clutch (7) and secondary driven gear (24)
It is fixedly connected, secondary driven gear (24), secondary driving gear (23), primary driven gear (22) and primary drive gear (21)
Two-stage gear reduction is constituted, primary drive gear (21) is fixedly connected with the motor shaft (19) of motor (14).
When braking operation, motor (14) drives one-way clutch (7) to combine by two-stage gear reduction, drives screw rod
(5) it rotates, pushes piston (11) and braking clamp body (3) to move in the opposite direction, drive corresponding friction plate (12) from two sides
It 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) move together
Dynamic, flexible deformation occurs for compressed spring (17), spring (17), stores elastic potential energy, the contact surface of snap ring (18) and piston (11)
Between without relative motion.Release braking operation when, motor (14) drive two-stage gear reduction rotate backward, at this point, unidirectionally from
Clutch (7) separation, screw rod (5) are in free state, and the elastic potential energy release of spring (17) storage makes piston (11) and caliper
Body (3) relative motion drives screw rod (5) to reversely rotate under the elastic potential energy effect in spring (17), and all elements restore just
Beginning position.
When friction plate (12) are worn, after thickness is thinning, when braking operation, motor (14) passes through two-stage gear reduction band
Dynamic one-way clutch (7) combine, and driving screw rod (5) rotation 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, braking
It is ineffective, at this time motor (14) continue through combination one-way clutch (7) driving screw rod (5) rotation, i.e., piston (11) and
Braking clamp body (3) continues relative motion, and therefore, spring (17) keeps maximum flexibility deflection, and piston (11) overcomes and snap ring
(18) frictional force between is matched with new contact surface with snap ring (18).When releasing braking, motor (14) drives two-stage gear
The reversion of deceleration mechanism, one-way clutch (7) separation, the elastic potential energy release of spring (17) make piston (11) and braking clamp body (3)
Relative motion drives screw rod (5) rotation, and snap ring (18) and piston (11) are cooperated at this time with new contact surface positions, return displacement
Amount is still the maximum flexibility deflection of spring (17), thus maintain brake clearance with abrasion before it is identical, realize brake cabin
The adjust automatically of gap.
When needing parking braking, so that motor (14) driving friction plate (12) is compressed brake disc (13), reach parking braking
It is required that then electromagnetic brake (20) powers off, locking motor shaft (19) keeps brake efficiency constant, motor can be realized at this time
(14) parking braking function under power blackout situation.When electromagnetic brake (20) is powered, discharge motor shaft (19), at this time braking moment
Size can freely be controlled by motor (14).
In the embodiment of attached drawing 3, one-way clutch (7) can also be arranged in primary drive gear (21), or it is primary from
In moving gear (22), or in secondary driving gear (23), then transmission mechanism includes the portion from motor output shaft to one-way clutch
Point, transmission system includes the part from one-way clutch to screw rod.
Attached the third embodiment shown in Fig. 4 and attached second of embodiment shown in Fig. 3 are essentially identical, and difference is: attached
The parking braking function under motor (14) power blackout situation is realized using electromagnetic brake (20) in Fig. 3；Automatically controlled machine is used in attached drawing 4
Tool brake apparatus realizes the parking braking function under motor (14) power blackout situation, and specific work process is as follows:
When electromagnetic coil (25) is powered, lock pin (27) is made lock pin by electromagnetic force, compression retracteding position spring (26)
(27) it is not in contact with each other with secondary driven gear (24), braking or the no any influence of release to brake；When the parking system of needs
When dynamic, motor (14) drives friction plate (12) to compress brake disc (13), reaches parking braking requirement, and then electromagnetic coil (25) is disconnected
Electricity, lock pin (27) are inserted into the tooth of secondary driven gear (24) under the elastic force effect of return spring (26), keep parking system
Dynamic effect, can be realized the parking braking function under motor (14) power blackout situation.
The structure of attached the third embodiment other parts shown in Fig. 4 and the course of work all with the embodiment phase in attached drawing 3
Together, it is not further described.
With reference to attached drawing 1 and attached drawing 2, the embodiment of automobile brake-by-wire device control method a kind of in the present invention is retouched
It states.
As shown in Figure 1, a kind of automobile brake-by-wire device control method includes automobile brake-by-wire device of the invention, target disc
(4), sensor (15), electronic control unit (not shown).Target disc (4) is fixedly mounted on the outer of the cylindrical section (5A) of screw rod (5)
On surface, sensor (15) is mounted on braking clamp body (3), installation corresponding with target disc (4), for detecting the movement of target disc (4)
State.When braking operation, motor (14) drives screw rod (5) rotation, and target disc (4) is rotated together with screw rod (5), and sensor (15) connects
The rotation information of target disc (4) is received, and is transmitted to electronic control unit, the size of current of electronic control unit combination motor (14) can calculate
To the clamping force size of brake, and severity of braking is adjusted.
Transmission mechanism can also use chain conveyer, V belt translation, planetary gear in addition to using worm gear mechanism, gear mechanism
Other kinds of drive such as transmission, friction limiting device can also be obtained in addition to using sealing ring, spring/snap ring using other structures
To realize that similar function, piston positioning means can also use spline, pin, piston in addition to using dive key, cylindrical roller
The non-circular equal various ways in outer surface, lockable mechanism can also act on lock pin dedicated on other gears or with gear one
On latch ratchet, or the modes such as ratchet and pawl arrangement are installed on motor shaft and realize latch functions.Obviously, described embodiment
Only a part of the embodiments of the present invention, instead of all the embodiments, based on the embodiments of the present invention, in the art
Those of ordinary skill's other all embodiments obtained under the premise of no progress creative work, belong to of the invention
Protection scope.
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 (6)
1. a kind of automobile brake-by-wire device includes motor, transmission mechanism, one-way clutch, screw rod, piston, rub limiting device,
Piston positioning means, braking clamp body, brake disc, friction plate；The screw rod includes thread segment and cylindrical section, the screw rod branch
It holds on the braking clamp body, the screw rod is in the axial direction without relative motion between the braking clamp body；Institute
The friction plate stated has two panels, is arranged symmetrically in the brake disc two sides, and one is mounted on the piston, and one is mounted on
On the braking clamp body；The piston is mounted on the braking clamp body via the friction limiting device, described
Piston positioning means move back and forth piston can only in axis direction, can not rotate；The internal piston has internal screw thread, with
The screw flight section matches；Inner ring of the cylindrical section outer surface of the screw rod as the one-way clutch,
The outer ring of the one-way clutch is fixedly connected with the final element of the transmission mechanism；The terminal of the transmission mechanism
Element movement, drives the one-way clutch outer ring to rotate, and one-way clutch combines, when the screw rod being driven to rotate, institute
The piston stated is mobile, and the braking clamp body and the screw rod are mobile to the direction opposite with the piston, described in drive
Friction plate from brake disc described in two side compressions；The input element of the motor connection transmission mechanism；Described
Friction limiting device a part is fixedly mounted on the braking clamp body, have between another part and the outer surface of piston compared with
Big frictional force, when having relative displacement between the piston and the braking clamp body, described in frictional force effect makes
Friction limiting device in generate elastic potential energy；
When braking, the motor is moved via the transmission mechanism driving one-way clutch outer ring, one-way clutch
Device combines, and drives the screw rod to rotate, the piston and the braking clamp body is driven to move in the opposite direction respectively,
So that the friction plate is pressed on the brake disc two sides, obtain the braking effect of high efficient and reliable, at this point, the piston and
There is relative displacement between the braking clamp body, generates elastic potential energy in the friction limiting device；When releasing braking,
The motor one-way clutch outer ring counter motion described via the transmission mechanism driving, one-way clutch separation,
Elastic potential energy effect inside the friction limiting device, makes the piston and the braking clamp body relative motion, extensive
Multiple initial position, the screw rod 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, the screw rod is driven to rotate, make the piston and the opposite shifting 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 screw rod to continue to rotate, the outer surface of the piston and the friction overcome to limit
Frictional force between device makes the piston and the braking clamp body continue to relatively move, and compresses brake disc, obtains reliable
Efficient braking effect；When releasing braking, the elastic potential energy in the friction limiting device is acted on, and makes the piston and institute
The braking clamp body relative motion stated, the piston and the friction limiting device are opposite solid with new contact position at this time
It is fixed, realize the adjust automatically of brake clearance.
2. a kind of automobile brake-by-wire device according to claim 1, it is characterised in that further include in the screw rod and institute
System working efficiency is improved to reduce frictional resistance using circulation spherical structure between the internal screw thread for the piston stated.
3. a kind of automobile brake-by-wire device according to claim 1, it is characterised in that further include in the one-way clutch
Increase transmission system between device and the screw rod.
4. a kind of automobile brake-by-wire device according to claim 1, it is characterised in that further include by the transmission mechanism
The final element connection one-way clutch inner ring, the outer ring of the screw rod connection one-way clutch, system
When starting building to make, the one-way clutch is combined, when releasing braking, the one-way clutch separation.
5. a kind of automobile brake-by-wire device according to claim 3, it is characterised in that when the transmission mechanism or described
Transmission system in be zero without reverse efficiency transmission link when, staying under the motor power blackout situation is realized using lockable mechanism
Vehicle braking, the lockable mechanism use electromagnetic brake or electric-controlled mechanical brake apparatus, can disconnect when being powered, when power-off
Actuated element in fixed conveyor link keeps the size of pressure between the friction plate and the brake disc, realizes parking
Braking function；It, can be with when being provided with the transmission link that reverse efficiency is zero in the transmission mechanism or the transmission system
Realize parking braking using the lockable mechanism, also can use reverse efficiency is zero, power and movement can not back transfer, it is real
Parking braking under the existing motor power blackout situation.
6. a kind of automobile brake-by-wire device control method, which is characterized in that using automobile line traffic control described in one of claim 1-5
Brake, when control method comprises the steps of: braking operation, the motor drives the transmission mechanism work, described
One-way clutch combine, drive the screw rod rotate, drive the piston and the braking clamp body mobile, make described in
Friction plate compress the brake disc two sides, the rotation information of the electronic control unit detection screw rod, in conjunction with the motor
Size of current, calculate braking clamping force；When the friction disc wear, the electronic control unit control motor is rotated to mend
Repay influence caused by abrasion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505844.5A CN107461428B (en) | 2017-06-20 | 2017-06-20 | A kind of automobile brake-by-wire device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505844.5A CN107461428B (en) | 2017-06-20 | 2017-06-20 | A kind of automobile brake-by-wire device and control method |
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| Publication Number | Publication Date |
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| CN107461428A CN107461428A (en) | 2017-12-12 |
| CN107461428B true CN107461428B (en) | 2019-09-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348070B (en) * | 2018-12-21 | 2021-07-09 | 比亚迪股份有限公司 | Brake, rail transit braking system and rail transit system |
| CN109624937A (en) * | 2019-01-09 | 2019-04-16 | 周丰 | A kind of parking device for electric vehicle |
| CN110486392B (en) * | 2019-07-27 | 2021-02-02 | 浙江师范大学 | Self-energizing wire control actuator |
| CN110594319A (en) * | 2019-08-20 | 2019-12-20 | 浙江师范大学 | Electronic mechanical hydraulic line control brake |
| CN112377539B (en) * | 2020-10-13 | 2021-11-30 | 东风汽车集团有限公司 | Brake device and vehicle |
| CN114810879B (en) * | 2022-06-08 | 2023-07-18 | 浙江师范大学 | Combined type wire control actuator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5234266B2 (en) * | 2008-08-29 | 2013-07-10 | 日立オートモティブシステムズ株式会社 | Disc brake device |
| JP5057164B2 (en) * | 2008-08-29 | 2012-10-24 | 日立オートモティブシステムズ株式会社 | Electric disc brake |
| CN202149166U (en) * | 2011-07-06 | 2012-02-22 | 隆中控股集团有限公司 | Automatic clearance adjusting mechanism of automobile pressure disc brake |
| CN102853000B (en) * | 2012-09-15 | 2014-07-09 | 浙江大学台州研究院 | Automobile brake controlled by wire |
| CN205578558U (en) * | 2016-04-07 | 2016-09-14 | 金华职业技术学院 | Automotive electronics mechanical brake with clearance adjustment function |
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