CN110486392A - A kind of self energizing effort brake-by-wire device - Google Patents
A kind of self energizing effort brake-by-wire device Download PDFInfo
- Publication number
- CN110486392A CN110486392A CN201910698984.8A CN201910698984A CN110486392A CN 110486392 A CN110486392 A CN 110486392A CN 201910698984 A CN201910698984 A CN 201910698984A CN 110486392 A CN110486392 A CN 110486392A
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- Prior art keywords
- brake
- piston
- braking
- clamp body
- small piston
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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
- F16D55/2255—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 pivoted
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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
- F16D65/186—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 with full-face force-applying member, e.g. annular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
- F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
- F16D65/567—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting on a disc brake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/14—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
- F16D2125/40—Screw-and-nut
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/44—Mechanical mechanisms transmitting rotation
- F16D2125/46—Rotating members in mutual engagement
- F16D2125/48—Rotating members in mutual engagement with parallel stationary axes, e.g. spur gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/44—Mechanical mechanisms transmitting rotation
- F16D2125/46—Rotating members in mutual engagement
- F16D2125/52—Rotating members in mutual engagement with non-parallel stationary axes, e.g. worm or bevel gears
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to a kind of self energizing effort brake-by-wire device, including motor, transmission mechanism, one-way clutch, thread mechanism, big piston, small piston, elastic positioning devices etc..Motor drives one-way clutch rotation by transmission mechanism, one-way clutch, which combines, drives thread mechanism, big piston and braking clamp body is respectively driven by thread mechanism to move in the opposite direction, friction plate is compressed from brake disc two sides with identical power, it realizes efficient self energizing effort braking effect, while avoiding mistake caused by other factors from main brake.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 self energizing effort brake-by-wire device.
Background technique
Brake-by-wire technology is a kind of novel braking technology occurred in recent years, between brake and brake pedal not
It is realized by the information control motor work of control system receiving sensor for automobile by mechanical or fluid power connection
Reliable and stable control for brake.Mainly there are electro-hydraulic formula braking system (EHB) and mechanical type brake system electric at present
(EMB) two kinds.Line control brake system is conducive to the optimization of braking performance of vehicle, can be easily other with ABS, ASR, ESP etc.
Electronic control system combines, therefore has wide development space.
For electro-hydraulic formula braking system (EHB) from traditional brake fluid system transformation, braking process is rapider,
Stablize, improves the braking safety and comfort of automobile, but due to remaining hydraulic unit, do not have complete brake-by-wire 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.
Current electromechanical brake is all based on greatly disk brake and designs, and introduces in electromechanical brake
Wedge-type mechanism can produce the effect of self energizing effort, by lesser motor driving force, obtain biggish brake efficiency.Disc type system
The free clearance very little of dynamic device, when being contacted due to impurity, unevenness etc. between friction plate and brake disc, due to wedge
The self energizing effort characteristic of formula mechanism, it is easy to the case where mistake braking occur.
Summary of the invention
It is an object of the invention to propose a kind of self energizing effort brake-by-wire device.The present invention has structure simple, reliable operation
The advantages that, it can be realized the automatic adjustment of brake clearance, while by the cooperation of big piston and mounting hole, wedge-type mechanism being avoided to produce
While being born from reinforcement effect, there is the case where accidentally braking.
Realize that the technical solution of the object of the invention is as follows:
A kind of self energizing effort brake-by-wire device, include motor, transmission mechanism, one-way clutch, thread mechanism, small piston, greatly
Piston, elastic positioning device, braking clamp body, brake disc, friction plate；The thread mechanism includes rotating member and moving member；Institute
The power input element of the motor connection the stated transmission mechanism；Described in the power output element connection of the transmission mechanism
One-way clutch, the rotating member of the described one-way clutch connection thread mechanism；The small piston is mounted on institute
On the braking clamp body stated, one end is connect with the thread mechanism, and the other end includes the curved-surface structure with certain curvature；Institute
The big piston stated is mounted in the mounting hole on the braking clamp body via the elastic positioning device, and one end installs institute
Curved-surface structure corresponding with the curved-surface structure of the small piston is arranged in the friction plate stated, the other end；The big piston
Curved end and the cooperation of the curved end of the small piston constitute contact surface；The friction plate has two panels, is arranged symmetrically in institute
The brake disc two sides stated, one is mounted on the big piston, and one is mounted on the braking clamp body；The elasticity
Positioning device a part is fixedly mounted on the braking clamp body, and another part and the big piston space have biggish friction
Power, when having relative displacement between big piston and braking clamp body, since frictional force effect makes to produce in the elastic positioning device
Raw elastic potential energy.
There is gap between mounting hole on the big piston and the braking clamp body, this gap size is greater than braking work
From friction plate and brake disc to deflection when generating maximum brake efficiency in big piston and small piston contact surface in work
On feedback, less than feedback of the free clearance between friction plate and brake disc on big piston and small piston contact surface.That is,
When braking operation, friction plate and brake disc produce on the curved surface between big piston and small piston since frictional force is acted on
Raw relative movement, realizes self energizing effort effect, when reaching maximum severity of braking, big piston is not contacted with mounting hole.When due to rubbing
When impurity or unevenness between pad and brake disc etc. contact the two, it can also be generated on the curved surface between big small piston
Relative movement, before free clearance is completely eliminated, big piston is contacted with mounting hole, because without self energizing effort effect.
It further include increasing transmission system between the one-way clutch and the thread mechanism.
It further include being rubbed in the position that the big piston and the small piston curved surface cooperate using roller mechanism with reducing
Wipe resistance.
It further include the setting friction limiting device between the small piston and the braking clamp body, the friction limit
Position device a part is fixedly mounted on the braking clamp body, there is biggish friction between another part and the small piston
Power, when having relative displacement between the small piston and the braking clamp body, since frictional force effect makes the friction
Elastic potential energy is generated in limiting device；When small piston and big piston move together, the axial bullet of big piston elastic positioning device
Power is less than the axial elastic force of small piston friction limiting device.
The moving member of the thread mechanism is connect with small piston/braking clamp body, and connection type includes being fixedly connected and doing
Integrally, be specifically included in thread mill drilling on small piston, on braking clamp body thread mill drilling, be fixedly mounted on small piston
Screw rod is fixedly mounted in screw rod on braking clamp body.
Further include that piston positioning means are set between the small piston and the braking clamp body, makes the small work
Plug can only be moved along axis, can not be rotated.
It further include that system working efficiency is improved to reduce frictional resistance using roll structure in the thread mechanism.
Contact surface between the big piston and the small piston can be inclined-plane, arc surface, hyperbola face, throw
The combination of the curved surfaces such as object line face or above-mentioned curved surface.
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, 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, 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.
Detailed description of the invention
Fig. 1 is a kind of main view of the embodiment one of self energizing effort brake-by-wire device of the invention.
Fig. 2 is a kind of A direction view of the embodiment one of self energizing effort brake-by-wire device of the invention.
Fig. 3 is a kind of main view of the embodiment two of self energizing effort brake-by-wire device of the invention.
Fig. 4 is a kind of main view of the embodiment three of self energizing effort brake-by-wire device of the invention.
Fig. 5 is a kind of main view of the example IV of self energizing effort brake-by-wire device of the invention.
Fig. 6 is a kind of main view of the embodiment five of self energizing effort brake-by-wire device of the invention.
Fig. 7 is a kind of main view of the embodiment six of self energizing effort brake-by-wire device of the invention.
Explanation: 1- brake-caliper support 2- guide pin 3- braking clamp body 4- plain thrust bearing 5- screw rod is marked in attached drawing
6- worm gear 7- one-way clutch 8- worm screw 9- small sealing ring 10- motor 11- small piston 12- friction plate 13- brake disc
14- motor shaft 15- electromagnetic brake 16- primary drive gear 17- spring 18- snap ring 19- primary driven gear 20- times
21- grade driven gear 22- electromagnetic coil 23- lock pin 24- return spring 25- nut 26- of grade driving gear is centripetal
The big piston 30- large sealing packing ring 31- tapered roller bearing 32- cylindrical roller of the oblique spring 28- frustum snap ring 29- of bearing 27-
The two-way nut 34- flat key 35- reverse-flighted screw of 33-
Specific embodiment
With reference to attached drawing 1 and attached drawing 2, one embodiment of the present of invention is described in detail.
As shown in Figure 1, a kind of self energizing effort 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 big piston (29), big piston (29) passes through
For frustum snap ring (28) on braking clamp body (3), frustum snap ring (28) is pushed to one far from brake disc (13) by oblique spring (27)
Side, oblique spring (27) are mounted on braking clamp body (3).There is biggish rub between frustum snap ring (28) and the contact surface of big piston (29)
Wipe power, when the displacement of big piston (29) is in the regime of elastic deformation of oblique spring (27), frustum snap ring (28) and big piston
(29) without relative motion between contact surface.The other end of big piston (29) has inclined-plane, and equally has bevelled small piston (11)
It is coupled, small piston (11) is mounted in braking clamp body (3), can be moved along its axis, the other end passes through plain thrust bearing
(4) cooperating with the screw rod of screw mechanism (5), the other end of screw rod (5) has screw thread, cooperates with the threaded hole on braking clamp body (3),
Outer surface is cooperated by one-way clutch (7) and worm gear (6).It is driven with the worm screw (8) of worm gear (6) cooperating by motor (10)
It is dynamic.
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 screw rod (5) rotation, due to there is plain thrust bearing (4) between screw rod (5) and small piston (11), the rotation of screw rod (5)
Small piston (11) will not be caused to rotate, and the threaded hole on screw rod (5) and braking clamp body (3) cooperates, braking clamp body (3) can not turn
It is dynamic, therefore the rotation of screw rod (5) moves downward small piston (11), small piston (11) pushes big piston (29) to move downward, together
When, braking clamp body (3) moves right, when friction plate (12) is contacted with brake disc (13), when generating frictional force, due to frictional force and
Curved surface effect between big small piston, keeps big piston (29) mobile relative to small piston (11), realizes self energizing effort effect.Reach most
When big severity of braking, big piston (29) and mounting hole are not contacted.At this point, frustum snap ring (28) and big piston (29) move together,
It compresses oblique spring (27), flexible deformation occurs for oblique spring (27), store elastic potential energy, frustum snap ring (28) and big piston (29)
Without relative motion between contact surface.When releasing braking operation, motor (10) drives worm gear mechanism to rotate backward, at this point, unidirectionally
Clutch (7) separation, screw rod (5) be in free state, and the elastic potential energy of oblique spring (27) storage discharges, make big piston (29)/
Small piston (11) and braking clamp body (3) relative motion drive screw rod (5) reversed under the elastic potential energy effect in oblique spring (27)
Rotation, all elements restore initial position.
When friction plate (12) are worn, after thickness is thinning, when braking operation, motor (10) is driven singly by worm gear mechanism
It is combined to clutch (7), driving screw rod (5) rotation, pushes big piston (29)/small piston (11) and the opposite fortune of braking clamp body (3)
Dynamic, after the elastic deformation amount of oblique spring (27) reaches maximum, since friction plate (12) are worn, motor (10) continues through combination
One-way clutch (7) drives screw rod (5) rotation, i.e., big piston (29)/small piston (11) and braking clamp body (3) continue opposite fortune
Dynamic, therefore, oblique spring (27) keeps maximum flexibility deflection, and big piston (29) overcomes the friction between frustum snap ring (28)
Power is matched with new contact surface with frustum snap ring (28), i.e., big piston (29) is greater than oblique relative to the displacement of braking clamp body (3)
The maximum flexibility deflection of spring (27).When releasing braking, motor (10) drives worm gear mechanism reversion, one-way clutch
(7) it separates, the elastic potential energy release of oblique spring (27) makes big piston (29)/small piston (11) and the opposite fortune of braking clamp body (3)
It is dynamic, drive screw rod (5) to reversely rotate, frustum snap ring (28) and big piston (29) are cooperated at this time with new contact surface positions, return
Displacement is still the maximum flexibility deflection of oblique spring (27), thus maintain brake clearance with abrasion before it is identical, realize
The adjust automatically of brake clearance.Gap adjustment during continuous braking can be common by big piston (29) and elastic positioning device
It completes.
When the transmission reverse efficiency of worm screw (8) and worm gear (6) is zero, motor (10) driving friction plate (12) can be made to compress
Brake disc (13) after reaching parking braking requirement, realizes motor (10) power blackout situation using the self-locking function of worm gear mechanism
Under parking braking.
With reference to attached drawing 3, another embodiment of the invention is described.
The embodiment of attached drawing 3 and the embodiment main distinction of attached drawing 1 are as follows:
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 (21) is the final element of transmission mechanism, one-way clutch (7) is mounted between secondary driven gear (21) and nut (25).
The connection type of thread mechanism is different, and the rotating member of thread mechanism is screw rod (5), the moving member of cooperation in attached drawing 1
Threaded hole is made of one with braking clamp body (3)；The rotating member of thread mechanism is nut (25), the moving member spiral shell of cooperation in attached drawing 3
Bar (5) is fixedly mounted on braking clamp body (3).
Elastic positioning device is different, realizes flexibly positioned function using oblique spring (27) and frustum snap ring (28) in attached drawing 1,
Flexible deformation, which is generated, using oblique spring (27) stores elastic potential energy；Flexibly positioned function is realized using large sealing packing ring (30) in attached drawing 3
Can, elastic potential energy is stored using the flexible deformation of large sealing packing ring (30).
Friction limiting device, including spring (17) and snap ring (18) are additionally arranged on small piston in attached drawing 3, for small work
Fill in limit and the return of (11).
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, illustrates and released when being powered using electromagnetic brake (15)
It discharges arbor (14), 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) powers off, lock pin (23) return spring (24) the lower insertion secondary of elastic force effect from
In the tooth of moving gear (21), parking braking effect is kept, the parking braking function under motor (10) power blackout situation can be realized.
As shown in figure 3, there is brake disc (13) in the jaw of braking clamp body (3), there are friction plate in the two sides of brake disc (13)
(12), one is mounted on braking clamp body (3), and one is mounted on big piston (29), and big piston (29) passes through large sealing packing ring (30) and fills
On braking clamp body (3), there is biggish frictional force between large sealing packing ring (30) and the contact surface of big piston (29), when big piston (29)
Displacement in the regime of elastic deformation of large sealing packing ring (30) when, without phase between large sealing packing ring (30) and the contact surface of big piston (29)
To movement.The other end of big piston (29) has inclined-plane, is coupled with equally having bevelled small piston (11), small piston (11)
Pass through the limiting device that rubs: spring (17) and snap ring (18) are mounted in braking clamp body (3), can be moved along its axis, the other end
Cooperated by the nut (25) of plain thrust bearing (4) and radial bearing (26) and screw mechanism, nut (25) is matched with screw rod (5)
It closes, screw rod (5) is fixedly mounted on braking clamp body (3).The outer surface of nut (25) is driven by one-way clutch (7) and secondary
Gear (21) connection, secondary driven gear (21), secondary driving gear (20), primary driven gear (19) and primary drive gear
(16) two-stage gear reduction is constituted, primary drive gear (16) is fixedly mounted on motor shaft (14).
When braking operation, motor (10) is combined by two-stage gear reduction driving one-way clutch (7), drives nut
(25) it rotates, big piston (29)/small piston (11) and braking clamp body (3) is pushed to move in the opposite direction, drive corresponding rub
Pad (12) is forced with identical to brake disc (13) from two sides, is produced using the curved surface between big piston (29) and small piston (11)
Raw self-energizing, realizes the braking effect of high efficient and reliable.Flexible deformation, snap ring (18) and small piston occur for large sealing packing ring (30)
(11) it moves together, compressed spring (17), flexible deformation occurs for spring (17), stores elastic potential energy, snap ring (18) and small piston
(11) without relative motion between contact surface.When releasing braking operation, motor (10) drives two-stage gear reduction to rotate backward,
At this point, one-way clutch (7) separates, nut (25) is in free state, the elasticity of large sealing packing ring (30) and spring (17) storage
Potential energy release, makes big piston (29)/small piston (11) and braking clamp body (3) relative motion, drives nut (25) in elastic potential energy
Effect is lower to be reversely rotated, and all elements restore 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) combine, and driving nut (25) rotation pushes big piston (29)/small piston (11) and braking clamp body (3) phase
To movement, large sealing packing ring (30)/spring (17) elastic deformation amount reaches maximum, and snap ring (18) is close on the step surface of left side
When, since friction plate (12) are worn, motor (10) continues to turn by one-way clutch (7) driving nut (25) combined at this time
Dynamic, i.e., big piston (29)/small piston (11) and braking clamp body (3) continue relative motion, therefore, large sealing packing ring (30)/spring
(17) maximum flexibility deflection is kept, and big piston (29) overcomes the frictional force between large sealing packing ring (30), small piston (11) gram
Frictional force between clothes and snap ring (18), is matched with new contact surface.When releasing braking, motor (10) drives two-stage gear to subtract
Fast mechanism reversion, one-way clutch (7) separation, the release of large sealing packing ring (30)/spring (17) elastic potential energy make big piston
(29)/small piston (11) and braking clamp body (3) relative motion drive nut (25) rotation, at this time large sealing packing ring (30) and big work
Fill in (29), snap ring (18) and small piston (11) are positioned with new contact surface cooperation, return displacement be still spring (17) most
Big elastic deformation amount's (axial elastic force that the axial elastic force of large sealing packing ring is less than spring), therefore before maintaining brake clearance and abrasion
It is identical, realize the adjust automatically of brake clearance.
When needing parking braking, so that motor (10) driving friction plate (12) is compressed brake disc (13), reach parking braking
It is required that then electromagnetic brake (15) powers off, locking motor shaft (14) keeps brake efficiency constant, motor can be realized at this time
(10) parking braking function under power blackout situation.When electromagnetic brake (15) is powered, discharge motor shaft (14), 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 lock pin
(23) return, when power-off, lock pin (23) is inserted into the tooth of secondary driven gear (21), is realized under motor (10) power blackout situation
Parking braking function.
In this embodiment, electric-controlled mechanical brake apparatus can also be acted directly on primary driven gear (19), or secondary
It on driving gear (20), or acts on the locking wheel being specially arranged, similar parking braking effect can be obtained.
In 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
Can be set in worm screw (8), then transmission mechanism includes the part that one-way clutch is output to from motor, transmission system include from
One-way clutch is to the rotating member part of thread mechanism.
In attached drawing 4, the rotating member of thread mechanism is nut (25), and moving member is that screw rod (5) are fixedly mounted on small piston
(11) piston positioning means-cylindrical roller (32) are provided on, thus between small piston (11) and braking clamp body (3), make small work
Plug (11) can only move axially, and can not rotate, remaining is identical as attached drawing 3.
In attached drawing 5, the rotating member of thread mechanism is two-way nut (33), and moving member is two oppositely oriented screw rods, spiral shell
Bar (5.1) is fixedly mounted on small piston (11), and screw rod (5.2) is fixedly mounted on braking clamp body (3), small piston (11) and system
The piston positioning means being arranged between moving caliper (3) are flat key (34), move axially small piston (11) can only, can not rotate,
The friction limiting device being arranged between small piston (11) and braking clamp body (3) is small sealing ring (9), remaining is identical as attached drawing 3.
In attached drawing 6, the rotating member of thread mechanism is reverse-flighted screw (35), and moving member is two oppositely oriented threaded holes,
It is processed as one respectively with small piston (11) and braking clamp body (3), the piston being arranged between small piston (11) and braking clamp body (3)
Positioning device is cylindrical roller (32), move axially small piston (11) can only, can not rotate, remaining is identical as attached drawing 3.
In attached drawing 7, the rotating member of thread mechanism is screw rod (5), and moving member is that threaded hole and small piston (11) are processed as one
Body, the piston positioning means being arranged between small piston (11) and braking clamp body (3) are flat key (34), make small piston (11) can only axis
It to movement, can not rotate, the elastic positioning device of big piston (29) is large sealing packing ring (30), and the friction of small piston (11) limits dress
Small sealing ring (9) are set to, remaining is identical as attached drawing 1.
Transmission mechanism can also use chain conveyer, V belt translation, lever in addition to using fixed axis gear mechanism, worm gear mechanism
The combination of other kinds of drive such as transmission, drag-line transmission, Planetary Gear Transmission or the above-mentioned kind of drive, elastic positioning device/rub
Similar function, piston can also be achieved using other structures in addition to using sealing ring, spring/snap ring by wiping limiting device
Positioning device is except using flat key, various ways, the locking such as spline, pin, outer surface of piston can also be used non-circular outside cylindrical roller
Lock pin can also be acted on the dedicated latch ratchet on other gears or with gear one, or pacified on motor shaft by mechanism
The modes such as dress ratchet and pawl arrangement realize latch functions.Obviously, described embodiment is only that a part of the invention is implemented
Example, instead of all the embodiments, based on the embodiments of the present invention, one of ordinary skilled in the art is not creating
Other all embodiments obtained under the premise of the property made is worked, belong to protection scope of the present invention.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved direct application
It is within the scope of the present invention in other occasions.
Claims (10)
1. a kind of self energizing effort brake-by-wire device includes motor, transmission mechanism, one-way clutch, thread mechanism, small piston, big work
Plug, elastic positioning device, braking clamp body, brake disc, friction plate；It is characterized by: the thread mechanism include rotating member and
Moving member；The power input element of the motor connection transmission mechanism；The power output member of the transmission mechanism
The part connection one-way clutch, the rotating member of the one-way clutch connection thread mechanism；The small work
Plug is mounted on the braking clamp body, and one end is connect with the thread mechanism, and the other end includes with certain curvature
Curved-surface structure；The big piston is mounted in the mounting hole on the braking clamp body via the elastic positioning device,
Curved-surface structure corresponding with the curved-surface structure of the small piston is arranged in the one end installation friction plate, the other end；Institute
The curved end for the big piston stated and the cooperation of the curved end of the small piston constitute contact surface；The friction plate has two panels,
The brake disc two sides are arranged symmetrically in, one is mounted on the big piston, and one is mounted on the braking clamp body
On；Described elastic positioning device a part is fixedly mounted on the braking clamp body, another part and the big piston
Between have biggish frictional force, when having relative displacement between the big piston and the braking clamp body, due to rub masterpiece
With making to generate elastic potential energy in the elastic positioning device.
2. a kind of self energizing effort brake-by-wire device according to claim 1, it is characterised in that: the big piston and described
There is gap between mounting hole on braking clamp body, this gap size is greater than in braking operation from friction plate and brake disc to production
Feedback of the deflection on big piston and small piston contact surface when raw maximum brake efficiency, be less than friction plate and brake disc it
Between feedback of the free clearance on big piston and small piston contact surface.
3. a kind of self energizing effort brake-by-wire device according to claim 1, it is characterised in that: further include it is described it is unidirectional from
Increase transmission system between clutch and the thread mechanism.
4. a kind of self energizing effort brake-by-wire device according to claim 1, it is characterised in that: further include in the big piston
Roller mechanism is used with the position that the small piston curved surface cooperates, to reduce frictional resistance.
5. a kind of self energizing effort brake-by-wire device according to claim 1, it is characterised in that: further include in the small piston
Setting friction limiting device, described friction limiting device a part are fixedly mounted on described between the braking clamp body
On braking clamp body, there is biggish frictional force between another part and the small piston, when the small piston and the braking
When having relative displacement between caliper, since frictional force effect makes to generate elastic potential energy in the friction limiting device；When small work
When plug and big piston move together, the axial elastic force of big piston elastic positioning device is less than the axial direction of small piston friction limiting device
Elastic force.
6. a kind of self energizing effort brake-by-wire device according to claim 1, it is characterised in that: the movement of the thread mechanism
Part is connect with small piston/braking clamp body, and connection type includes being fixedly connected and being made of one, and is specifically included on small piston and is processed
Threaded hole, on braking clamp body thread mill drilling, on small piston be fixedly mounted screw rod, spiral shell is fixedly mounted on braking clamp body
Bar.
7. a kind of self energizing effort brake-by-wire device according to claim 6, it is characterised in that: further include in the small piston
Piston positioning means are set between the braking clamp body, move the small piston can only along axis, can not be rotated.
8. a kind of self energizing effort brake-by-wire device according to claim 1, it is characterised in that: further include in the rib machine
Roll structure is used in structure, to reduce frictional resistance, improves system working efficiency.
9. a kind of self energizing effort brake-by-wire device according to claim 1, it is characterised in that: the big piston and described
Contact surface between small piston can be the group of the curved surfaces such as inclined-plane, arc surface, hyperbola face, parabola face or above-mentioned curved surface
It closes.
10. a kind of self energizing effort brake-by-wire device according to claim 3, it is characterised in that: when the transmission mechanism or
When the transmission link for being zero without reverse efficiency in the transmission system, realized using lockable mechanism under the motor power blackout situation
Parking braking, the lockable mechanism uses electromagnetic brake or electric-controlled mechanical brake apparatus, can disconnect when being powered, is disconnected
Actuated element when electric in fixed conveyor link keeps the size of pressure between the friction plate and the brake disc, realizes
Parking braking function；When being provided with the transmission link that reverse efficiency is zero in the transmission mechanism or the transmission system,
It can use the lockable mechanism and realize parking braking, also can use that reverse efficiency is zero, power and movement can not be passed reversely
It passs, realizes the parking braking under the motor power blackout situation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910698984.8A CN110486392B (en) | 2019-07-27 | 2019-07-27 | Self-energizing wire control actuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910698984.8A CN110486392B (en) | 2019-07-27 | 2019-07-27 | Self-energizing wire control actuator |
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| CN110486392A true CN110486392A (en) | 2019-11-22 |
| CN110486392B CN110486392B (en) | 2021-02-02 |
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| CN201910698984.8A Active CN110486392B (en) | 2019-07-27 | 2019-07-27 | Self-energizing wire control actuator |
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| CN110925334A (en) * | 2019-12-27 | 2020-03-27 | 湖北科技学院 | Clamp type braking structure with anti-lock function |
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| CN110486392B (en) | 2021-02-02 |
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