CN110486393A - 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
- CN110486393A CN110486393A CN201910710208.5A CN201910710208A CN110486393A CN 110486393 A CN110486393 A CN 110486393A CN 201910710208 A CN201910710208 A CN 201910710208A CN 110486393 A CN110486393 A CN 110486393A
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- China
- Prior art keywords
- brake
- piston
- clamp body
- braking
- braking clamp
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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
- F16D2125/405—Screw-and-nut with differential thread
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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
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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
- F16D2125/58—Mechanical mechanisms transmitting linear movement
- F16D2125/68—Lever-link mechanisms, e.g. toggles with change of force ratio
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, connecting rod, elastic positioning devices etc..Motor drives one-way clutch rotation by transmission mechanism, one-way clutch, which combines, drives thread mechanism, the movement of connecting rod is driven by thread mechanism, big piston and braking clamp body is driven 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 includes motor, and transmission mechanism, one-way clutch, thread mechanism, big piston is small
Piston, braking clamp body, brake disc, friction plate, connecting rod, elastic positioning device；It is characterized by: the friction plate has two
Piece is arranged symmetrically in the brake disc two sides, and one is mounted on the big piston, and one is mounted on the caliper
On body；The big piston is mounted in the mounting hole on the braking clamp body via the elastic positioning device；It is described
Elastic positioning device a part be fixedly mounted on the braking clamp body, another part has larger with the big piston space
Frictional force, when having relative displacement between the big piston and the braking clamp body, due to frictional force effect make it is described
Elastic positioning device in generate elastic potential energy；The thread mechanism includes rotating member and moving member；The motor connection
The input element of the transmission mechanism；The final element connection of the transmission mechanism one-way clutch, it is described
The rotating member of the one-way clutch connection thread mechanism；The moving member of the thread mechanism and the small piston it
Between or the braking clamp body between connected using the connecting rod；The small piston is mounted on the braking clamp body
On, one end is connect with the connecting rod, and the other end includes the curved surface with certain slope；The big piston is mounted on described
Braking clamp body on mounting hole in, one end installation friction plate, the other end includes the curved surface with certain slope, and small
The curved end of piston, which is engaged, constitutes contact surface.
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.
Connection between moving member/small piston/braking clamp body of the connecting rod and the thread mechanism, Ke Yitong
The relative motion crossed between moving member/small piston/braking clamp body of the connecting rod and the thread mechanism, which meets, brakes
Change in location when device works between component can also pass through moving member/small work of connecting rod and the thread mechanism
The change in location when flexible deformation of junction meets brake operation between plug/braking clamp body between component.
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.
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.
The contact point between connecting rod and the small piston described in further including can be on the small piston surface
It is mobile；Or the contact point between the connecting rod and the braking clamp body can move up on the braking clamp body surface
It is dynamic.
It further include, to reduce frictional resistance, improving system work effect using circulation spherical structure in the thread mechanism
Rate.
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.
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.
Fig. 8 is a kind of main view of the embodiment seven of self energizing effort brake-by-wire device of the invention.
Explanation: 1- brake-caliper support 2- guide pin 3- braking clamp body 4- screw rod (4.1 right handed screws is marked in attached drawing
4.2 left-handed screw 4A reverse-flighted screws) 5- nut (5.1 right-handed nut, the 5.2 two-way nut of left-handed nut 5A) 6- connecting rod 7-
Small piston 8- one-way clutch 9- locking wheel 10- motor 11- motor shaft 12- electromagnetic brake 13- large sealing packing ring 14-
Big piston 15- friction plate 16- brake disc 17- snap ring 18- spring 19- driving gear 20- driven gear 21- return bullet
The oblique spring 29- of spring 22- electromagnetic coil 23- lock pin 24- worm gear 25- worm screw 26- drive plate 27- frustum snap ring 28-
Small sealing ring
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 (16), brake disc (16)
Two sides have friction plate (15), one on braking clamp body (3), one on big piston (14), big piston (14) passes through
Large sealing packing ring (13) has biggish friction between large sealing packing ring (13) and the contact surface of big piston (14) on braking clamp body (3)
Power, when the displacement of big piston (14) is in the regime of elastic deformation of large sealing packing ring (13), large sealing packing ring (13) and big piston
(14) without relative motion between contact surface.The other end of big piston (14) has inclined-plane, matches with equally having bevelled small piston (7)
Installation is closed, small piston (7) is mounted in braking clamp body (3), can move along its axis, the other end has two-way nut (5A), thereon
Left-handed threaded portion be equipped with left-handed screw (4.2), right-handed thread part is equipped with right handed screw (4.1), connecting rod (6) hinge
Chain link left-handed screw (4.2) and small piston (7), right handed screw (4.1) and small piston (7), left-handed screw (4.2) and caliper
Body (3), right handed screw (4.1) and braking clamp body (3), these connecting rods (6) are symmetrical arranged, the outer surface of two-way nut (5A)
It is connect by one-way clutch (8) with worm gear (24), is driven with the worm screw (25) of worm gear (24) cooperating by motor (10).
When braking operation, motor (10) drives worm screw (25) and worm gear (24) rotation, and one-way clutch (8) combines at this time,
Two-way nut (5A) is driven to rotate, left-handed screw (4.2) and right handed screw (4.1) are limited by connecting rod (6), can only be along two-way spiral shell
Both the axis direction of female (5A) is mobile, at this point, left-handed screw (4.2) moves down, right handed screw (4.1) is moved up, i.e.,
Two-way nut (5A) is screwed in simultaneously, is moved toward one another, connecting rod (6) movement is driven, pushes braking clamp body (3) to move right, simultaneously
Small piston (7) and big piston (14) are pushed to move downward, when friction plate (15) is contacted with brake disc (16), generates frictional force,
Due to the curved surface effect between frictional force and big small piston, keeps big piston (14) mobile relative to small piston (7), realize self energizing effort
Effect.When reaching maximum severity of braking, big piston (14) and mounting hole are not contacted.Become at this point, elasticity occurs for large sealing packing ring (13)
Shape stores elastic potential energy, without relative motion between large sealing packing ring (13) and the contact surface of big piston (14).When releasing braking operation,
Motor (10) drives worm gear mechanism to rotate backward, at this point, one-way clutch (8) separates, two-way nut (5A) is in freely
State, the elastic potential energy release of large sealing packing ring (13) storage make big piston (14)/small piston (7) and the opposite fortune of braking clamp body (3)
It is dynamic, connecting rod (6) movement is driven, left-handed screw (4.2) is pushed to move upwards, right handed screw (4.1) moves downward, i.e. the two back
To movement, two-way nut (5A) reversely rotates under the elastic potential energy effect in large sealing packing ring (13), and all elements restore initial
Position.
When friction plate (15) are worn, after thickness is thinning, when braking operation, motor (10) is driven singly by worm gear mechanism
It is combined to clutch (8), drives two-way nut (5A) to rotate, push big piston (14)/small piston (7) and braking clamp body (3) phase
To movement, when the elastic deformation amount of large sealing packing ring (13) reaches maximum, since friction plate (15) are worn, motor (10) is continued through
In conjunction with one-way clutch (8) drive the rotation of two-way nut (5A), i.e., big piston (14)/small piston (7) and braking clamp body (3) after
Continuous relative motion, therefore, large sealing packing ring (13) keep maximum flexibility deflection, and big piston (14) overcomes and large sealing packing ring (13)
Between frictional force, matched with new contact surface with large sealing packing ring (13), i.e., big piston (14) is relative to braking clamp body (3)
Displacement is greater than the maximum flexibility deflection of large sealing packing ring (13).When releasing braking, motor (10) drives worm gear mechanism reversion,
One-way clutch (8) separation, the elastic potential energy release of large sealing packing ring (13), makes big piston (14)/small piston (7) and braking clamp body
(3) relative motion drives two-way nut (5A) to reversely rotate, and large sealing packing ring (13) and big piston (14) are at this time with new contact surface
Cooperation positioning, return displacement are still the maximum flexibility deflection of large sealing packing ring (13), therefore maintain brake clearance and mill
It is identical before damage, realize the adjust automatically of brake clearance.
When the transmission reverse efficiency of worm screw (25) and worm gear (24) is zero, motor (10) driving friction plate (15) pressure can be made
Tight brake disc (16) after reaching parking braking requirement, realizes that motor (10) power off feelings using the self-locking function of worm gear mechanism
Parking braking under condition.
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 (24) is the terminal member of transmission mechanism
Part, one-way clutch (8) are mounted between worm gear (24) and two-way nut (5A)；Gear mechanism transmission is used in attached drawing 3, it is driven
Gear (20) is the final element of transmission mechanism, and one-way clutch (8) is mounted between driven gear (20) and screw rod (4).
Thread mechanism and its connection type are different, and in attached drawing 1, thread mechanism is that two-way nut (5A) and two are oppositely oriented
Screw rod (4.1,4.2), two-way nut (5A) be rotating member, be connected with one-way clutch (8), screw rod (4.2,4.1) be move
Part is connected with small piston (7) and braking clamp body (3) simultaneously by connecting rod (6)；In attached drawing 3, thread mechanism be screw rod (4) and
Nut (5), screw rod (4) are rotating member, are connected one-way clutch (8), and nut (5) is moving member, are connect with connecting rod (6),
It is to pass through connecting rod (6) while connecting small piston (7) and braking clamp body (3).
Elastic positioning device is different, in attached drawing 1, realizes flexibly positioned function using large sealing packing ring (13), utilizes big sealing
The flexible deformation for enclosing (13) stores elastic potential energy；It is flexibly positioned using oblique spring (28) and frustum snap ring (27) realization in attached drawing 3
Function generates flexible deformation using oblique spring (28) and stores elastic potential energy.
The limiting device that rubs is different, not set friction limiting device on small piston in attached drawing 1, is additionally arranged friction in attached drawing 3
Limiting device realizes limit and the return of small piston (7) by small sealing ring (29).
The connection type of connecting rod is different, connecting rod (6) and small piston (7)/nut (5)/braking clamp body (3) in attached drawing 3
Between connection type be elastic connection, during braking operation and release in braking process, pass through the flexible deformation of junction
Meet the relative motion requirement between each component.It is connected in the embodiment one of attached drawing 1 for hinge, system is met by hinge movement
Job requirement.
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 (12)
It discharges arbor (11), locking motor shaft (11) 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 (21) makes lock pin (23) be not in contact with each other with locking wheel (9), does not have to the braking or release of brake
Any influence；When needing parking braking, motor (10) drives friction plate (15) to compress brake disc (16), reaches parking braking and wants
It asks, then electromagnetic coil (22) powers off, and lock pin (23) is inserted into the tooth of locking wheel (9) under the elastic force effect of return spring (21)
In, 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 (16) in the jaw of braking clamp body (3), there are friction plate in the two sides of brake disc (16)
(15), one is mounted on braking clamp body (3), and one is mounted on big piston (14), and big piston (14) passes through frustum snap ring (27) and fills
On braking clamp body (3), frustum snap ring (27) pushes the side far from brake disc (16), oblique spring (28) peace to by oblique spring (28)
On braking clamp body (3).There is biggish frictional force between frustum snap ring (27) and the contact surface of big piston (14), when big piston
(14) when displacement is in the regime of elastic deformation of oblique spring (28), nothing between frustum snap ring (27) and the contact surface of big piston (14)
Relative motion.The other end of big piston (14) has inclined-plane, is coupled with equally having bevelled small piston (7), small piston (7)
Pass through the limiting device that rubs: small sealing ring (29) is mounted in braking clamp body (3), can be moved along its axis, the other end has screw rod
(4), threaded portion thereon is equipped with nut (5), connecting rod (6) attaching nut (5) and small piston (7) and nut (5) and
The outer surface of braking clamp body (3), screw rod (4) is equipped with one-way clutch (8), and one-way clutch (8) connects driven gear (20), from
Moving gear (20) is engaged with driving gear (19), and driving gear (19) is fixedly mounted on motor shaft (11).
When braking operation, motor (10) drives driving gear (19) rotation, drives driven gear (20) rotation, at this time unidirectionally
Clutch (8) combines, and drives screw rod (4) rotation, pushes big piston (14)/small piston (7) and braking clamp body (3) to opposite side
To movement, corresponding friction plate (15) is driven to be forced from two sides with identical to brake disc (16), utilizes big piston (14) and small
Curved surface between piston (7) generates self-energizing, realizes the braking effect of high efficient and reliable.At this point, frustum snap ring (27) and big
Piston (14) moves together, and compresses oblique spring (28), and flexible deformation occurs for oblique spring (28), and elasticity also occurs for small sealing ring (29)
Deformation stores elastic potential energy, without relative motion between small sealing ring (29) and the contact surface of small piston (7).When releasing braking operation,
Motor (10) drives driven gear (20) to rotate backward, at this point, one-way clutch (8) separates, screw rod (4) is in free state,
The elastic potential energy release of oblique spring (28) and small sealing ring (29) storage, makes big piston (14)/small piston (7) and braking clamp body
(3) relative motion drives screw rod (4) to reversely rotate under elastic potential energy effect, and all elements restore initial position.
When friction plate (15) are worn, after thickness is thinning, when braking operation, motor (10) by gear mechanism drive unidirectionally from
Clutch (8) combines, and driving screw rod (4) rotation pushes big piston (14)/small piston (7) and braking clamp body (3) relative motion, tiltedly
When the elastic deformation amount of spring (28) and small sealing ring (29) reaches maximum, since friction plate (15) are worn, braking effect is bad,
Motor (10) is continued to rotate by one-way clutch (8) driving screw rod (4) combined at this time, i.e., big piston (14)/small piston (7)
Continue relative motion with braking clamp body (3), therefore, oblique spring (28) and small sealing ring (29) keep maximum flexibility deflection, and
Big piston (14) overcomes the frictional force between frustum snap ring (27), and small piston (7) overcomes rubbing between small sealing ring (29)
Power is wiped, is matched with new contact surface.When releasing braking, motor (10) drives gear mechanism reversion, one-way clutch (8) point
From the elastic potential energy release of oblique spring (28) and small sealing ring (29) makes big piston (14)/small piston (7) and braking clamp body (3)
Relative motion drives screw rod (4) rotation, and small sealing ring (29) and small piston (7) are cooperated at this time with new contact surface positions, return
Displacement is still the maximum flexibility deflection of small sealing ring (29), thus maintain brake clearance with abrasion before it is identical, realize
The adjust automatically of brake clearance.
When needing parking braking, so that motor (10) driving friction plate (15) is compressed brake disc (16), reach parking braking
It is required that then electromagnetic brake (12) powers off, locking motor shaft (11) keeps brake efficiency constant, motor can be realized at this time
(10) parking braking function under power blackout situation.Or electric-controlled mechanical brake apparatus is used, locking is installed on motor shaft (11)
It takes turns (9), when energization, electromagnetic coil (22) makes lock pin (23) return, and when power-off, lock pin (23) is inserted into the tooth of locking wheel (9)
In, realize the parking braking function under motor (10) power blackout situation.
In this embodiment, electric-controlled mechanical brake apparatus can also act directly on driving gear (19) or driven gear
(20) on, similar parking braking effect can be obtained.
In the embodiment of attached drawing 3, one-way clutch (8) can also be arranged in driving gear (19) or motor shaft
(11) in；In the embodiment of attached drawing 1 and attached drawing 2, one-way clutch (8) can also be arranged in worm screw (25), then driver
Structure includes the part that one-way clutch is output to from motor, and transmission system includes the rotation from one-way clutch to thread mechanism
Part.
In embodiment three represented by attached drawing 4, motor shaft (11) is directly connected to screw rod (4), spiral shell by one-way clutch (8)
Bar (4) is supported on braking clamp body (3), can only be rotated along own axes direction, is equipped with nut (5) thereon.Connecting rod (6) is even
Small piston (7) and nut (5) are connect, the friction limiting device of small piston (7) is made of spring (18) and snap ring (17).Braking operation
When, motor (10) drives screw rod (4) rotation by one-way clutch (8), and connecting rod (6) is pushing big piston (14)/small piston
(7) lead-screw (4) and braking clamp body (3) move right simultaneously when being moved to the left, and realize the braking effect of high efficient and reliable.It is made
Start building to make and contact course of work etc. of the course of work, the course of work of parking braking and the brake clearance adjustment of braking with
Relatively, which is not described herein again for embodiment one, embodiment two.In this embodiment, the rotating member position of thread mechanism is not
Fix, but moved together with braking clamp body (3) again, it is of course also possible to accordingly change bearing and connection type, make its with it is small
Piston (7) moves together.
In the example IV of attached drawing 5, transmission mechanism is worm gear mechanism, and the elastic positioning device of big piston (14) is by oblique
Spring (28) and frustum snap ring (27) composition, the rotating member of thread mechanism is nut (5), and position is fixed, and one-way clutch is passed through
(8) it is connect with worm gear (24), moving member-screw rod (4) connects small piston (7) and braking clamp body (3) by connecting rod (6) simultaneously.
In the embodiment five of attached drawing 6, motor shaft (11) connects drive plate (26), passes through one-way clutch (8) and two-way spiral shell
Bar (4A) is directly connected to, and has left-handed nut (5.2) and right-handed nut (5.1) on reverse-flighted screw (4A), and connecting rod (6) connects simultaneously
Small piston (7) and nut and braking clamp body (3) and nut, the connection between connecting rod (6) and small piston (7)/braking clamp body (3)
Point has multiple.
In the embodiment six of attached drawing 7, motor shaft (11) is directly connected to by one-way clutch (8) with reverse-flighted screw (4A),
Reverse-flighted screw (4A) is supported on braking clamp body (3), there is left-handed nut (5.2) and right-handed nut (5.1), connecting rod (6) thereon
One end is connected on nut, and the other end is contacted with small piston (7) and can be moved on the surface of small piston (7).It connects left-handed
The connecting rod (6) of nut (5.2) and the connecting rod (6) for connecting right-handed nut (5.1) are hinged in shaft position.Left-handed spiral shell when work
Female (5.2) and right-handed nut (5.1) move toward one another, and move toward one another contact point of the connecting rod (6) on small piston (7) also, push away
It moves big piston (14)/small piston (7) to be moved to the left, while reverse-flighted screw (4A) and braking clamp body (3) being pushed to move right together,
It drives corresponding friction plate (15) to be forced from two sides with identical to brake disc (16), realizes braking operation process.
In the embodiment seven of attached drawing 8, the rotating member of thread mechanism uses two-way nut (5A), and moving member is left-handed screw
(4.2) it is supported on small piston (7) with right handed screw (4.1), two-way nut (5A), the connection type and implementation of connecting rod (6)
Example six is identical, and course of work etc. is also essentially identical.
Since specific embodiment is excessive, only provide a part here, it is intended to show: the rotating member of thread mechanism can be with
It is nut or its deformable member, such as two-way nut；It is also possible to screw rod or its deformable member, such as reverse-flighted screw.The position of rotating member can
It with fixation, can be supported on braking clamp body, can also be supported on small piston.
Transmission mechanism can also use chain conveyer, band in addition to using direct-drive, fixed axis gear mechanism, worm gear mechanism
The combination of other kinds of drive such as transmission, lever drive, drag-line transmission, Planetary Gear Transmission or the above-mentioned kind of drive, elasticity are fixed
Position device/friction limiting device can also be achieved similar in addition to using sealing ring, spring/snap ring using other structures
Function, lockable mechanism can also act on lock pin on the dedicated latch ratchet on other gears or with gear one, or
The modes such as ratchet and pawl arrangement are installed on motor shaft and realize latch functions.Obviously, described embodiment is only of the invention
A part of the embodiment, instead of all the embodiments, based on the embodiments of the present invention, one of ordinary skilled in the art exists
Other all embodiments obtained under the premise of creative work are not carried out, protection scope of the present invention is belonged to.
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, big piston, small work
Plug, braking clamp body, brake disc, friction plate, connecting rod, elastic positioning device；It is characterized by: 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；The big piston is mounted in the mounting hole on the braking clamp body via the elastic positioning device；Described
Elastic positioning device a part is fixedly mounted on the braking clamp body, and another part has biggish with the big piston space
Frictional force, when having relative displacement between the big piston and the braking clamp body, due to frictional force effect make it is described
Elastic potential energy is generated in elastic positioning device；The thread mechanism includes rotating member and moving member；The motor connects institute
The input element for the transmission mechanism stated；The final element connection of the transmission mechanism one-way clutch, the list
The rotating member of the thread mechanism described to clutch connection；Between the moving member and the small piston of the thread mechanism
Or it is connected between the braking clamp body using the connecting rod；The small piston is mounted on the braking clamp body,
One end is connect with the connecting rod, and the other end includes the curved surface with certain slope；The big piston is mounted on described
In mounting hole on braking clamp body, one end installation friction plate, the other end includes the curved surface with certain slope, with small work
The curved end of plug, which is engaged, constitutes contact surface.
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: the connecting rod and described
Connection between moving member/small piston/braking clamp body of thread mechanism can pass through the connecting rod and the rib machine
Change in location when relative motion between moving member/small piston/braking clamp body of structure meets brake operation between component, can also
Become with the elasticity by junction between moving member/small piston/braking clamp body of the connecting rod and the thread mechanism
Change in location when shape meets brake operation between component.
6. a kind of self energizing effort brake-by-wire device according to claim 3, it is characterised in that: when the transmission mechanism or institute
When the transmission link for being zero without reverse efficiency in the transmission system stated, realized using lockable mechanism under the motor power blackout situation
Parking braking, the lockable mechanism use electromagnetic brake or electric-controlled mechanical brake apparatus, can disconnect when being powered, power-off
When fixed conveyor link in actuated element, keep the size of pressure between the friction plate and the brake disc, realization is stayed
Vehicle braking function；It, can when being provided with the transmission link that reverse efficiency is zero in the transmission mechanism or the transmission system
To realize parking braking using the lockable mechanism, also can use reverse efficiency be zero, power and movement can not back transfer,
Realize the parking braking under the motor power blackout situation.
7. 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.
8. a kind of self energizing effort brake-by-wire device according to claim 1, it is characterised in that: further include the connecting rod with
Contact point between the small piston can move on the small piston surface；Or the connecting rod and described
Contact point between braking clamp body can move on the braking clamp body surface.
9. 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
System working efficiency is improved to reduce frictional resistance using circulation spherical structure in structure.
10. a kind of self energizing effort brake-by-wire device according to claim 1, it is characterised in that: further include in the small work
Setting friction limiting device, described friction limiting device a part are fixedly mounted on described between plug and the braking clamp body
Braking clamp body on, have biggish frictional force between another part and the small piston, when the small piston and the system
When having relative displacement between moving caliper, since frictional force effect makes to generate elastic potential energy in the friction limiting device；When small
When piston and big piston move together, the axial elastic force of big piston elastic positioning device is less than the axis of small piston friction limiting device
To elastic force.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910710208.5A CN110486393B (en) | 2019-07-27 | 2019-07-27 | Self-energizing wire control actuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910710208.5A CN110486393B (en) | 2019-07-27 | 2019-07-27 | Self-energizing wire control actuator |
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| CN110486393A true CN110486393A (en) | 2019-11-22 |
| CN110486393B CN110486393B (en) | 2021-01-15 |
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| CN201910710208.5A Active CN110486393B (en) | 2019-07-27 | 2019-07-27 | Self-energizing wire control actuator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382802A (en) * | 2022-03-09 | 2022-04-22 | 浙江师范大学 | Wire control actuator |
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| CN110486393B (en) | 2021-01-15 |
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