CN102506106B - Electronic mechanical brake and automobile - Google Patents

Electronic mechanical brake and automobile Download PDF

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Publication number
CN102506106B
CN102506106B CN2011103360024A CN201110336002A CN102506106B CN 102506106 B CN102506106 B CN 102506106B CN 2011103360024 A CN2011103360024 A CN 2011103360024A CN 201110336002 A CN201110336002 A CN 201110336002A CN 102506106 B CN102506106 B CN 102506106B
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self
motion
motor
friction plate
locking
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CN102506106A (en
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高国兴
杜金枝
王陆林
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Chery Automobile Co Ltd
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Chery Automobile Co Ltd
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Abstract

The invention provides an electronic mechanical brake which comprises a brake caliper body, a brake disc, a friction disk and an actuating unit, wherein the actuating unit comprises a motor and a movement mechanism which is connected with an output end of the motor, the movement mechanism is arranged in the brake caliper body, and the actuating unit also comprises an elastic mechanism; the elastic mechanism is sleeved on the movement mechanism and is propped against an internal surface of the brake caliper body, and the elastic mechanism is positioned in a compression state before the movement mechanism moves forward; and the movement mechanism does a straight-line motion forward, and elastic potential energy in the elastic mechanism is released so as to push the movement mechanism to do an acceleration forward motion. Accordingly, the invention provides an automobile. The electronic mechanical brake outputs a torque to generate a brake clamping force through the coupling of the elastic mechanism and the motor, and larger brake clamping force can carry out braking when the motor outputs less power; and the response time of a brake system is shortened, the output power of the motor is reduced, the braking effect is better, and the electronic mechanical brake has four-wheel parking braking action.

Description

A kind of electromechanical brake and automobile
Technical field
The invention belongs to field of automobile, be specifically related to a kind of electromechanical brake, and the automobile that comprises described electromechanical brake.
Background technique
Development along with automotive engineering, people have higher requirement to power character, Economy, Security, maneuverability and the travelling comfort of automobile, more efficient, energy-conservation electromechanical braking system occurred, the mechanical system in automobile is changed to electronic mechanical system gradually.
Electromechanical braking system uses electronic component to replace the part mechanical component, and substitutes whole braking lines by electric wire, has saved the valve element of a lot of braking system, has shortened the braking response time, has improved braking ability, has saved space hold; In addition, the integral body that adopts electronic control unit ECU to carry out braking system is controlled, and each break has control unit separately, can increase various electronic control functions on this basis, is convenient to carry out the integrated of function and improves.And electromechanical braking system changes conventional hydraulic or the air-pressure brake executive component is electric driving element, is convenient to realize brake-by-wire, is a kind of brand-new braking technology.Due to electric driving element, have the characteristics such as controllability is good, fast response time, electromechanical braking system has improved the brake safe performance of automobile greatly, shows good development prospect.
In the prior art, electromechanical brake is in the process of braking, rely on the motor output torque to drive corresponding brake actuator and do straight line motion, to eliminate the brake clearance between brake disc and friction plate, produce the braking clamping force, thereby realize braking.In the process of carrying out above-mentioned braking, because the motor transmission torque need be through a series of transmission device to produce the braking clamping force, its time that produces the braking clamping force is longer, and the real-time of braking effect is poor, can not meet vehicle when carrying out emergency braking for the requirement of braking response time.In addition, the braking clamping force that the motor transmission torque produces is less, can not realize braking under larger braking clamping force, and braking effect is poor.
in addition, in long-term braking process, friction between friction plate and brake disc can make the continuous attenuate of the thickness of friction plate, cause the brake clearance meeting between friction plate and brake actuator increasing, and vehicle in braking process, need to eliminate described brake clearance could produce the braking clamping force, during braking, when described brake clearance is in certain limit, it can meet the requirement of braking real-time, but when described brake clearance exceeds this scope and becomes increasing, its braking response overlong time, affected the real-time of braking, braking effect is not good, therefore how effectively to eliminate brake clearance, it is problem demanding prompt solution in prior art that realization is braked with larger braking clamping force in the time at shorter braking response.
Summary of the invention
Technical problem to be solved by this invention is for above shortcomings in prior art, the automobile that a kind of electromechanical brake is provided and comprises this break, its braking response time is short, can produce larger braking clamping force, good braking effect, also have the effect of four-wheel parking braking.
the technological scheme that solution the technology of the present invention problem adopts is that this electromechanical brake comprises braking clamp body, brake disc, friction plate, thereby and can promote friction plate and travel forward and clamp the power mechanism of brake disc, described power mechanism comprises motor and the motion that is connected with the output terminal of motor, described motion can be converted to straight line motion by rotatablely moving of motor, motion is located in braking clamp body, described friction plate is arranged on the place ahead of motion, wherein, in described power mechanism, also include elastic mechanism, described elastic mechanism is sleeved on motion, be limited between the internal surface of described motion and braking clamp body, before motion travels forward, elastic mechanism is in compressive state, when motion forward during moving linearly, thereby the elastic potential energy in elastic mechanism is released the promotion motion and accelerates to travel forward.
preferably, in this break, also include the clearance self-regulating mechanism that can automatically adjust brake clearance between motion and friction plate, described clearance self-regulating mechanism is arranged at described motion the place ahead, it comprises the non-self-locking nut that is fixedly connected with described motion, the non-self-locking screw that is connected by non-self-locking thread with described non-self-locking nut, piston cylinder and be located at the interior jump ring in described piston cylinder, described piston-cylinder is contained in the front end of motion, and the piston cylinder outer surface coordinates with the internal surface gaps of braking clamp body, the front end of non-self-locking screw is arranged in piston cylinder, interior jump ring is limited in the front end of non-self-locking screw in piston cylinder, thereby make non-self-locking screw do axial motion with respect to piston cylinder.
Preferably, in described electromechanical brake, also include magnetic clutch, it is movably arranged on the output shaft of motor.During the outage of described magnetic clutch, be pull-in on the output shaft of motor, the output shaft of motor is stuck, can not output torque; The output shaft disconnection of magnetic clutch when energising and motor, the output shaft of motor is free to rotate.
Preferably, in described power mechanism, also include the moment of torsion enlarger, it is arranged between described motor and motion, and described moment of torsion enlarger adopts swash plate reducing gear or three grades of reducing gears; The input end of described moment of torsion enlarger is connected with the output shaft of motor, and the output terminal of moment of torsion enlarger is connected with the input end of motion.
Preferably, described motion adopts screw mechanism, described screw mechanism comprises leading screw and is sleeved on the feed screw nut on leading screw, described leading screw is connected with the output shaft of motor, the output shaft rotation of motor drives leading screw and rotates, leading screw rotate to promote feed screw nut forward moving linearly with friction plate, contact, thereby and the promotion friction plate clamping brake disc that travels forward.
Certainly, the motion in the present invention also can adopt other structures that can realize identical function.
Preferably, described elastic mechanism comprises spring, and described spring housing is contained on feed screw nut, and the front end of described feed screw nut is provided with step, and an end of described spring withstands on the internal surface of braking clamp body, and the other end withstands on the step of feed screw nut front end.
Further preferred, described spring adopts one or more groups butterfly spring, and described butterfly spring adopts the stacked structure of combined type or opposite.The described butterfly spring of respectively organizing forms by a plurality of butterfly springs are stacking, and a plurality of butterfly spring has identical structure.The butterfly spring group is sleeved on feed screw nut, and an end withstands on the internal surface of braking clamp body, the other end withstands on the step of feed screw nut front end, before motion travels forward, by the pretightening force by certain, act on butterfly spring and make it be in compressive state, feed screw nut plays positioning action to butterfly spring.Volume is little, load is large, be used in combination the characteristics such as convenient because belleville spring has, also has advantages of simultaneously load concentration transmission, on the load direction, butterfly spring just can bear larger load by less distortion, its axial space compactness, the effect of impact-absorbing and dissipation energy is more remarkable.
Preferably, between described braking clamp body and leading screw, also be provided with biserial thrust angular contact bearing, the outer ring of described biserial thrust angular contact bearing and braking clamp body interference fit, its inner ring and leading screw interference fit.
preferably, in this break, also include the clearance self-regulating mechanism that can automatically adjust brake clearance between described motion and friction plate, described clearance self-regulating mechanism comprises non-self-locking nut, non-self-locking screw, piston cylinder and is located at the interior jump ring in described piston cylinder, described piston-cylinder is contained in the front end of feed screw nut, the piston cylinder outer surface coordinates with the internal surface gaps of braking clamp body, the ear end face of non-self-locking nut is fixedly connected on the front end of feed screw nut, the middle part of non-self-locking nut has through hole, the internal surface of described through hole is provided with non-self-locking internal thread, the outer surface of non-self-locking screw is provided with non-self-locking thread, leading screw has center hole near the middle part, termination of an end of friction plate, non-self-locking screw passes the perforation of described non-self-locking nut and enters in the center hole of leading screw, the part that non-self-locking screw stretches into non-self-locking nut is connected by described non-self-locking thread with the internal surface of the perforation of non-self-locking nut, non-self-locking screw stretches into the part and described center hole Spielpassung of the center hole of leading screw, the front end of non-self-locking screw enters in piston cylinder from the perforation of non-self-locking nut, stretching out, described interior jump ring is limited in the front end of non-self-locking screw between the internal surface and interior jump ring of piston cylinder, thereby make non-self-locking screw do axial motion with respect to piston cylinder.
Further preferred, thrust bearing also is installed, the frictional force when it can reduce non-self-locking screw rotation between the front end of described interior jump ring and non-self-locking screw; Described non-self-locking nut and feed screw nut to be fixedly connected with mode with bolts.
Preferably, described electromechanical brake also includes contact, described contact is fixed on the front end of feed screw nut, described feed screw nut drives the direction moving linearly of contact to friction plate, described contact is contacted with friction plate, thereby and promote friction plate and travel forward and clamp brake disc.
Further preferred, the mode of the with bolts or interference fit of the means of fixation between described contact and feed screw nut front end, described contact employing piston cylinder or sleeve.
Preferably, described electromechanical brake also includes be used to adjusting the adjustment piece of brake clearance between contact and friction plate, and described adjustment piece passes the inwall of braking clamp body away from friction plate one end, and withstands on the end of spring away from friction plate.
Further preferred, described adjustment piece adopts one or more adjustment bolts, by tightening, adjusts that bolt makes its motion of direction to friction plate and Compress Spring makes spring be in compressive state.By adjusting, adjust the front and back position of bolt in braking clamp body, can realize the adjustment to brake clearance between motion and friction plate.Wherein, the mode of described adjustment brake clearance is: tighten the adjustment bolt and make its motion of direction to friction plate and Compress Spring, make spring promote the direction moving linearly of motion to friction plate, thereby described motion promotes friction plate, travel forward and reduce brake clearance.
A kind of automobile that comprises above-mentioned electromechanical brake.
In the present invention, the compression process of butterfly spring is: magnetic clutch energising output shaft rear and motor disconnects, controlling motor reversal drive leading screw rotates with respect to braking clamp body, and the drive feed screw nut is done axial motion to the direction of butterfly spring, thereby the compression butterfly spring is until motor rotation blockage, be the moment compression butterfly spring that motor reversal produces, make it be in compressive state; Magnetic clutch cuts off the power supply afterwards and the output shaft adhesive of motor, the output shaft of motor is stuck, and the compressive state of butterfly spring is remained between feed screw nut and braking clamp body, after the magnetic clutch adhesive, stop the rotation of motor, prevent that the reverse drive motor of pretightening force of storing butterfly spring from rotating, to guarantee the pre-compressed effect of butterfly spring.Due to butterfly spring, withstand between the internal surface of the step of feed screw nut front end and braking clamp body, and by pretightening force, butterfly spring is under compressive state, stored elastic potential energy, when feed screw nut travels forward, this elastic potential energy can be exchanged into the Driving force forward that acts on feed screw nut, drives feed screw nut and accelerates the direction motion to friction plate.
In described electromechanical brake braking process, the motor forward, the pretightening force in butterfly spring discharges, and promotes feed screw nut and drive clearance self-regulating mechanism to do feed movement to the direction of friction plate; Simultaneously, the output torque of motor itself passes torque to leading screw after the deceleration of moment of torsion enlarger increases square, and the drive leading screw rotates, thereby leading screw and feed screw nut coordinate the drive feed screw nut to make feed movement promotion clearance self-regulating mechanism to the direction of friction plate to travel forward, and namely butterfly spring and motor are coupled the common feed screw nut that promotes to the previous crops feed movement.
described electromechanical brake also has the effect of four-wheel parking braking, when needs carry out the parking braking operation, magnetic clutch energising output shaft rear and motor disconnects, the motor forward, pretightening force in butterfly spring discharges, accelerate to promote feed screw nut to the previous crops feed movement, produce the braking clamping force for parking braking, realize the four-wheel parking braking, the electromechanical brake that uses the present invention to propose, without being installed, parking brake carries out parking braking, only the button of controlling the magnetic clutch break-make need be set, can realize the four-wheel parking braking, simplified parking braking system of the prior art, saved space, parking braking is effective.
Described elastic mechanism can reach 5%~100% of total braking force because of the braking force that the elasticity pretightening force produces, like this, when the less power of motor output (be about original power 40%), coupling by elastic mechanism has realized braking with larger braking clamping force, reduced the output power of motor, reduce simultaneously the output speed requirement of motor, and had good braking effect, thereby reduced the requirement of electromechanical brake to motor performance.
The invention has the beneficial effects as follows: by elastic mechanism and motor coupling output torque, produce the braking clamping force, shortened the response time of whole braking system, when exporting less power, motor realized braking with larger braking clamping force, reduced the output power of motor, the effect that also has the four-wheel parking braking, its braking effect is better.
The advantages such as simultaneously, this electromechanical brake also has compact structure, brake clearance is adjustable, long service life.
The accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1 electromechanical brake;
Fig. 2 is the structural representation of the clearance self-regulating mechanism in Fig. 1;
Fig. 3 is the structural representation (combined type) of the butterfly spring in Fig. 1;
Fig. 4 is the structural representation of the embodiment of the present invention 3 electromechanical brakes;
Fig. 5 is the structural representation of the embodiment of the present invention 4 electromechanical brakes;
Fig. 6 is the structural representation of the embodiment of the present invention 5 electromechanical brakes.
In figure: the 1-brake disc; The 2-friction plate; The 3-clearance self-regulating mechanism; The 4-butterfly spring; The 5-feed screw nut; The 6-leading screw; The 7-braking clamp body; 8-biserial thrust angular contact bearing; 9-moment of torsion enlarger; The 10-motor; The 11-magnetic clutch; 12-adjusts bolt; The 31-piston cylinder; The 32-thrust bearing; Jump ring in 33-; The 34-non-self-locking nut; The non-self-locking screw of 35-.
Embodiment
For making those skilled in the art understand better technological scheme of the present invention, below in conjunction with accompanying drawing, electromechanical brake of the present invention and automobile are described in further detail.
electromechanical brake of the present invention comprises braking clamp body 7, brake disc 1, friction plate 2, thereby and can promote friction plate 2 and travel forward and clamp the power mechanism of brake disc 1, described power mechanism comprises the motion that motor 10 is connected with output terminal with motor 10, described motion can be converted to straight line motion by rotatablely moving of motor, motion is located in braking clamp body 7, described friction plate 2 is arranged on the place ahead of described motion, in described power mechanism, also include elastic mechanism, described elastic mechanism is sleeved on motion, and be limited between the internal surface of described motion and braking clamp body 7, before motion travels forward, elastic mechanism is in compressive state, when motion forward during moving linearly, thereby the elastic potential energy in elastic mechanism is released the promotion motion and accelerates to travel forward.
Embodiment 1:
As shown in Figure 1, in the present embodiment, thereby this electromechanical brake comprises braking clamp body 7, brake disc 1, friction plate 2, can promote friction plate 2 the travel forward power mechanism that clamps brake disc 1 and the clearance self-regulating mechanism 3 that can automatically adjust brake clearance between motion and friction plate 2.
Wherein, power mechanism comprises motor 10, magnetic clutch 11, moment of torsion enlarger, rotatablely moving of motor 10 is converted to straight-line motion and elastic mechanism.In this example, described motor 10 adopts DC brushless motor; Described moment of torsion enlarger 9 adopts the swash plate reducing gear, and described swash plate reducing gear comprises the swash plate differential tooth reduction gear that increases square for deceleration.
The input end of described swash plate reducing gear is connected on the output shaft of motor 10, and output terminal is connected on the input end of motion, thereby the rotation output torque of motor 10 outputs to motion after the deceleration of swash plate reducing gear increases square.
In the present embodiment, motion adopts screw mechanism, screw mechanism comprise leading screw 6 and are sleeved on the feed screw nut 5 on leading screw 6, and described feed screw nut 5 Spielpassung are in braking clamp body 7.the output terminal of swash plate reducing gear is connected with leading screw 6, thereby the moment of slowing down after increasing square through the swash plate reducing gear of motor 10 outputs can be delivered on leading screw 6, driving leading screw 6 rotates with respect to braking clamp body 7, because leading screw 6 and feed screw nut 5 cooperatively interact by screw thread, and the front end of feed screw nut 5 withstands on clearance self-regulating mechanism 3, the cooperation of feed screw nut 5 and leading screw 6 drives feed screw nut 5 to the previous crops feed movement, thereby promoting clearance self-regulating mechanism 3 travels forward, due to friction plate 2, be arranged on the place ahead of described screw mechanism, clearance self-regulating mechanism 3 travels forward and contacts with friction plate 2, can eliminate the gap between brake disc 1 and friction plate 2, friction plate 2 clamps brake disc 1, produce the braking clamping force for braking, to realize braking.
Wherein, magnetic clutch 11 is movably arranged on the output shaft of motor 10, during 11 outage of described magnetic clutch, is pull-in on the output shaft of motor 10, and the output shaft of motor 10 is stuck, can not output torque; During energising, magnetic clutch 11 unclamps the output shaft of motor 10, makes the output shaft of motor 10 free to rotate.
In the present embodiment, between braking clamp body 7 and leading screw 6, also be provided with biserial thrust angular contact bearing 8.The outer ring of biserial thrust angular contact bearing 8 and braking clamp body 7 interference fit, its inner ring and leading screw 6 interference fit.
Elastic mechanism comprises spring, described spring housing be contained on feed screw nut 5 and Spielpassung in braking clamp body 7.In the present embodiment, spring adopts butterfly spring.As shown in Figure 3, butterfly spring adopts many groups, and every group of butterfly spring forms by a plurality of butterfly springs are stacking, and a plurality of butterfly spring has identical structure.Butterfly spring adopts the stacked structure of combined type or opposite, and in the present embodiment, belleville spring 4 adopts the stacked structure of combined type.Butterfly spring 4 is sleeved on feed screw nut 5, one end of described butterfly spring 4 withstands on the inwall of braking clamp body 7, the other end withstands on the step surface of feed screw nut 5 front ends, before motion travels forward, by the pretightening force by certain, act on butterfly spring 4 and make it be in compressive state, 5 pairs of butterfly springs 4 of feed screw nut play positioning action.
The compression process of butterfly spring 4 is: magnetic clutch 11 energisings output shaft rear and motor 10 disconnects, motor 10 counter-rotatings drive leading screw 6 and rotate with respect to braking clamp body 7, and drive feed screw nut 5 moves to the direction away from friction plate 2, thereby compression butterfly spring 4 is until motor 10 stalls, be the moment compression butterfly spring 4 that motor 10 counter-rotatings produce, make it be in compressive state; Magnetic clutch 11 cuts off the power supply afterwards and the output shaft adhesive of motor 10, the output shaft of motor 10 is stuck, the compressive state of butterfly spring 4 is remained between the internal surface of feed screw nut 5 and braking clamp body 7, after magnetic clutch 11 adhesives, stop the rotation of motor 10, prevent that the reverse drive motor 10 of pretightening force of storing butterfly spring 4 from rotating, to guarantee the pre-compressed effect of butterfly spring 4.Due to an end of butterfly spring 4, withstand between the internal surface of the step of feed screw nut 5 front ends and braking clamp body 7, and by pretightening force, butterfly spring 4 is under compressive state, stored elastic potential energy, when feed screw nut 5 travelled forward, this elastic potential energy can be exchanged into the Driving force forward that acts on feed screw nut 5.
As shown in Figure 2, clearance self-regulating mechanism 3 comprises piston cylinder 31, thrust bearing 32, interior jump ring 33, non-self-locking nut 34 and non-self-locking screw 35.
Piston cylinder 31 is sleeved on the front end of feed screw nut 5, and the outer surface of described piston cylinder 31 coordinates with braking clamp body 7 internal surface gaps, and thrust bearing 32 and interior jump ring 33 are located in piston cylinder 31.
The ear end face of non-self-locking nut 34 end of friction plate 2 (namely away from) is fixedly connected on the front end of feed screw nut 5, in the present embodiment, described non-self-locking nut 34 and feed screw nut 5 to be fixedly connected with mode with bolts.the front-end face of non-self-locking nut 34 can contact with non-self-locking screw 35 front ends, the middle part of non-self-locking nut 34 is provided with perforation, the internal surface of described perforation is provided with non-self-locking internal thread, the outer surface of non-self-locking screw 35 is provided with non-self-locking thread, leading screw 6 has center hole near the middle part, termination of an end of friction plate 2, non-self-locking screw 35 stretches in described non-self-locking nut 34 and enters in the center hole of described leading screw, the part that non-self-locking screw 35 stretches into non-self-locking nut 34 is connected by described non-self-locking thread with the internal surface of the perforation of non-self-locking nut 34, non-self-locking screw 35 stretches into the part and described center hole Spielpassung of the center hole of leading screw 6, the front end of non-self-locking screw 35 enters in piston cylinder 31 from the perforation of non-self-locking nut 34, stretching out, described interior jump ring 33 is limited in the front end of non-self-locking screw 35 between the internal surface and interior jump ring 33 of piston cylinder 31, thereby make non-self-locking screw 35 do axial motion with respect to piston cylinder 31.Like this, when motor 10 counter-rotating, non-self-locking screw 35 can not return with non-self-locking nut 34, and can only in piston cylinder 31, rotate.
Interior jump ring 33 is arranged in piston cylinder 31, and thrust bearing 32 is fixedly mounted between the front end of jump ring 33 and non-self-locking screw 35, the frictional force while rotating to reduce non-self-locking screw 35.
In the present embodiment, the working procedure of described electromechanical brake is as follows:
In the break braking process, motor 10 forwards, magnetic clutch 11 energisings disconnect with the output shaft of motor 10, and the pretightening force that is stored in butterfly spring 4 is released, and promote feed screw nut 5 and drive clearance self-regulating mechanism 3 to do feed movement to the direction of friction plate 2; Simultaneously, the output torque of motor 10 own passes torque to leading screw 6 after the deceleration of swash plate reducing gear increases square, and drive leading screw 6 rotates, thereby leading screw 6 and feed screw nut 5 coordinates and drives feed screw nuts 5 and to the direction of friction plate 2, do feed movement and promote clearance self-regulating mechanism 3 and travels forward, and namely butterfly spring 4 and the motor 10 common feed screw nut 5 that promotes that is coupled is done feed movement to the direction of friction plate 2.
In the proal while of feed screw nut 5, feed screw nut 5 passes to thrust the non-self-locking nut 34 that is fixedly connected with it, driving non-self-locking nut 34 marches forward to and eliminates fast the gap between non-self-locking nut 34 and non-self-locking screw 35, and promote non-self-locking screw 35 and withstand on the internal surface of piston cylinder 31, and then pushing piston cylinder 31 is done feed movement to friction plate 2 directions, thereby eliminated the gap between brake disc 1 and friction plate 2, produce the braking clamping force for braking, to realize braking.
After the break braking completes, motor 10 counter-rotatings, and drive leading screw 6 rotations by the swash plate reducing gear, leading screw 6 and feed screw nut 5 cooperations drive the opposite direction axial motion of feed screw nut 5 to friction plate 2, be that feed screw nut moves backward, thereby drive non-self-locking nut 34, move backward.This moment, the front end due to non-self-locking screw 35 was limited between the inboard and interior jump ring 33 of piston cylinder 31, when non-self-locking nut 34 moves backward with feed screw nut 5, non-self-locking screw 35 can't be stepped back with non-self-locking nut 34, can only in piston cylinder 31, rotate, like this, non-self-locking screw 35 and thrust roller bearing 32 rotate with respect to non-self-locking nut 34 together, that is to say, clearance self-regulating mechanism 3 can travel forward in the process of braking, during end of braking, can not return its original position with feed screw nut 5.Therefore, when break uses long end after the time, although the thickness of friction plate 2 thins down, but because clearance self-regulating mechanism 3 is also constantly travelling forward near friction plate 2, simultaneously because feed screw nut 5 contacts and brakes with friction plate 2 by clearance self-regulating mechanism 3, thereby not there will be the increasing phenomenon of brake clearance between friction plate 2 and clearance self-regulating mechanism 3, thereby realized the self-regulation effect of brake clearance.
the electromechanical brake that the present invention proposes also has the effect of four-wheel parking braking, concrete, when needs carry out the parking braking operation, magnetic clutch 11 energisings output shaft rear and motor 10 disconnects, motor 10 forwards, pretightening force in butterfly spring 4 discharges, accelerate to promote feed screw nut 5 to the previous crops feed movement, produce the braking clamping force for parking braking, realize the four-wheel parking braking, the electromechanical brake that uses the present invention to propose, without being installed, parking brake carries out parking braking, only the button of controlling magnetic clutch 11 break-makes need be set, can realize the four-wheel parking braking, simplified parking braking system of the prior art, saved space, parking braking is effective.
5%~100% of the total braking force that the rear active force that produces of elastic potential energy conversion of butterfly spring 4 is whole break, like this, when motor 10 is exported less power, the coupling of itself and butterfly spring 4 has realized braking with larger braking clamping force, thereby reduced the output power of motor 10, simultaneously also reduce the output speed requirement of motor 10, and had good braking effect, thereby reduced the requirement of electromechanical brake to motor performance; Simultaneously, the pretightening force of described break butterfly spring 4 in braking process is released, accelerate feed screw nut drive clearance self-regulating mechanism and done feed movement to the direction of friction plate 2, thereby eliminated fast the gap between brake disc 1 and friction plate 2, shortened the cumulative time that break is braked, realized with larger braking clamping force, realizing braking, good braking effect within the shorter response time.
A kind of automobile that comprises electromechanical brake described in the present embodiment.
Embodiment 2:
The present embodiment and embodiment's 1 difference is: in the present embodiment, do not have the elastic mechanism in embodiment 1.
Other structures in the present embodiment and use are all identical with embodiment 1, repeat no more here.
Embodiment 3:
The present embodiment and embodiment's 1 difference is:
(1) in the present embodiment, do not have the clearance self-regulating mechanism 3 in embodiment 1.
The front end of described feed screw nut 5 can directly contact with friction plate 2, by eliminating the gap between brake disc 1 and friction plate 2, to realize braking.
Perhaps, as shown in Figure 4, on the front end of described feed screw nut 5, be provided with contact, described contact is fixed on the front end of feed screw nut 5, described contact can directly contact with friction plate 2, by eliminating the gap between brake disc 1 and friction plate 2, to realize braking.In the present embodiment, described contact adopts piston cylinder, and the means of fixation of the front end of described piston cylinder and feed screw nut 5 adopts interference fit.
(2) the present embodiment also includes be used to adjusting the adjustment piece of brake clearance between described contact and friction plate 2, and described adjustment piece passes the inwall of braking clamp body 7 away from friction plate 2 one ends, and withstands on the end of spring away from friction plate 2.In the present embodiment, described adjustment piece adopts one or more adjustment bolts 12, by tightening, adjusts that bolt 12 makes its motion of direction to friction plate 2 and Compress Spring makes spring be in compressive state.By adjusting, adjust the front and back position of bolt 12 in braking clamp body, can realize the adjustment to brake clearance between motion and friction plate 2.
Concrete, the mode of adjusting the brake clearance between bolt 12 adjustment motions and friction plate 2 is:
Tighten adjustment bolt 12 and make its motion of direction to friction plate 2 and Compress Spring, make spring be in compressive state, stored elastic potential energy, during braking, spring discharges elastic potential energy, promote feed screw nut 5 and to friction plate 2 directions, move together with contact, thereby promote friction plate 2, travel forward and reduced brake clearance, reach the purpose of adjusting brake clearance.By certain pretightening force, act on butterfly spring 4 and make it be in compressive state, make break can produce in the short period of time larger braking clamping force in braking process on the one hand, make on the other hand to adjust between bolt 12 and butterfly spring 4 and produce interaction force, at the relative position without adjusting bolt 12 and butterfly spring 4 under External Force Acting, fix, avoid the wild effect of brake clearance.
Other structures in the present embodiment and use are all identical with embodiment 1, repeat no more here.
Embodiment 4:
As shown in Figure 5, the present embodiment and embodiment's 3 difference is:
Contact described in the present embodiment adopts sleeve, and the means of fixation of the front end of described sleeve and feed screw nut 5 is with bolts, and described moment of torsion enlarger 9 adopts three grades of reducing gears; The present embodiment does not possess the adjustment bolt 12 in embodiment 3.
Other structures in the present embodiment and use are all identical with embodiment 3, repeat no more here.
Embodiment 5:
As shown in Figure 6, the present embodiment and embodiment's 4 difference is: in the present embodiment, do not have the magnetic clutch 11 in embodiment 4.
Other structures in the present embodiment and use are all identical with embodiment 4, repeat no more here.
By above detailed description to the above embodiment of the present invention, can understand the present invention and produce the braking clamping force by elastic mechanism and motor 10 coupling output torques, and can automatically adjust the brake clearance between friction plate 2 and motion, shortened the response time of braking system, when exporting less power, motor 10 realized braking with larger braking clamping force, reduced the output power of motor 10, its braking effect is better.
Be understandable that, above mode of execution is only the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement also are considered as protection scope of the present invention.

Claims (12)

1. electromechanical brake, comprise braking clamp body (7), brake disc (1), friction plate (2), and can promote friction plate (2) thereby travel forward to clamp the power mechanism of brake disc (1), described power mechanism comprises the motion that motor (10) is connected with output terminal with motor (10), described motion can be converted to straight line motion by rotatablely moving of motor, motion is located in braking clamp body (7), described friction plate (2) is arranged on the place ahead of motion, it is characterized in that, in described power mechanism, also include elastic mechanism, described elastic mechanism is sleeved on motion, be limited between the internal surface of described motion and braking clamp body (7), before motion travels forward, elastic mechanism is in compressive state, when motion forward during moving linearly, thereby the elastic potential energy in elastic mechanism is released the promotion motion and accelerates to travel forward,
Described motion adopts screw mechanism, described screw mechanism comprises leading screw (6) and is sleeved on the feed screw nut (5) on leading screw (6), described leading screw (6) is connected with the output shaft of motor (10), the output shaft rotation of motor (10) drives leading screw (6) and rotates, leading screw (6) rotation promotion feed screw nut (5) moving linearly forward contacts with friction plate (2), and promotes friction plate (2) thereby travel forward to clamp brake disc (1);
in this break, also include the clearance self-regulating mechanism (3) that can automatically adjust brake clearance between described motion and friction plate (2), described clearance self-regulating mechanism (3) comprises non-self-locking nut (34), non-self-locking screw (35), piston cylinder (31) and is located at the interior jump ring (33) in described piston cylinder (31), described piston cylinder (31) is sleeved on the front end of feed screw nut (5), piston cylinder (31) outer surface coordinates with the internal surface gaps of braking clamp body (7), the ear end face of non-self-locking nut (34) is fixedly connected on the front end of feed screw nut (5), the middle part of non-self-locking nut (34) has through hole, the internal surface of described through hole is provided with non-self-locking internal thread, the outer surface of non-self-locking screw (35) is provided with non-self-locking thread, leading screw (6) has center hole near the middle part, termination of an end of friction plate (2), non-self-locking screw (35) passes the perforation of described non-self-locking nut (34) and enters in the center hole of leading screw, the part that non-self-locking screw (35) stretches into non-self-locking nut (34) is connected by described non-self-locking thread with the internal surface of the perforation of non-self-locking nut (34), non-self-locking screw (35) stretches into the part and described center hole Spielpassung of the center hole of leading screw (6), the front end of non-self-locking screw (35) enters in piston cylinder (31) from the perforation of non-self-locking nut, stretching out, described interior jump ring (33) is limited in the front end of non-self-locking screw (35) between the internal surface and interior jump ring (33) of piston cylinder (31), thereby make non-self-locking screw (35) do axial motion with respect to piston cylinder (31).
2. electromechanical brake according to claim 1, is characterized in that, in described electromechanical brake, also includes magnetic clutch (11), and it is movably arranged on the output shaft of motor (10); Described magnetic clutch (11) outage is pull-in on the output shaft of motor (10) time, during magnetic clutch (11) energising with the output shaft disconnection of motor (10).
3. electromechanical brake according to claim 1 and 2, it is characterized in that, in described power mechanism, also include moment of torsion enlarger (9), it is arranged between described motor (10) and motion, and described moment of torsion enlarger (9) adopts swash plate reducing gear or three grades of reducing gears; The input end of described moment of torsion enlarger (9) is connected with the output shaft of motor (10), and the output terminal of moment of torsion enlarger (9) is connected with the input end of motion.
4. electromechanical brake according to claim 1, it is characterized in that, described elastic mechanism comprises spring, described spring housing is contained on feed screw nut (5), the front end of described feed screw nut (5) is provided with step, one end of described spring withstands on the internal surface of braking clamp body (7), and the other end withstands on the step of feed screw nut (5) front end.
5. electromechanical brake according to claim 4, is characterized in that, described spring adopts one or more groups butterfly spring (4), and described butterfly spring (4) adopts the stacked structure of combined type or opposite.
6. electromechanical brake according to claim 1, it is characterized in that, between described braking clamp body (7) and leading screw (6), also be provided with biserial thrust angular contact bearing (8), the outer ring of described biserial thrust angular contact bearing (8) and braking clamp body (7) interference fit, its inner ring and leading screw (6) interference fit.
7. electromechanical brake according to claim 1, is characterized in that, between the front end of described interior jump ring (33) and non-self-locking screw (35), thrust bearing (32) also is installed; Described non-self-locking nut (34) and feed screw nut (5) to be fixedly connected with mode with bolts.
8. one of according to claim 4-6 described electromechanical brakes, it is characterized in that, described electromechanical brake also includes contact, described contact is fixed on the front end of feed screw nut (5), described feed screw nut (5) drives the direction moving linearly of contact to friction plate (2), described contact is contacted with friction plate (2), and promote friction plate (2) thereby travel forward to clamp brake disc (1).
9. electromechanical brake according to claim 8, is characterized in that, the mode of the with bolts or interference fit of the means of fixation between described contact and feed screw nut (5) front end, and described contact adopts piston cylinder or sleeve.
10. electromechanical brake according to claim 8, it is characterized in that, described electromechanical brake also includes be used to adjusting the adjustment piece of brake clearance between contact and friction plate (2), described adjustment piece passes the inwall of braking clamp body (7) away from friction plate (2) one ends, and withstands on the end of spring away from friction plate (2).
11. electromechanical brake according to claim 10, it is characterized in that, described adjustment piece adopts one or more adjustment bolts (12), by tightening, adjusts that bolt (12) makes its motion of direction to friction plate (2) and Compress Spring makes spring be in compressive state.
12. an automobile, comprise break, it is characterized in that, described break adopts one of claim 1-11 described electromechanical brake.
CN2011103360024A 2011-10-27 2011-10-27 Electronic mechanical brake and automobile Active CN102506106B (en)

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CN105691374A (en) * 2016-01-28 2016-06-22 江苏大学 Heavy-duty car motor drive air braking system and braking method
CN106286649B (en) * 2016-08-31 2018-11-20 焦作市制动器有限公司 Release brake apparatus
CN106224415A (en) * 2016-09-08 2016-12-14 上海六辔机电科技有限公司 A kind of rail vehicle motor drives friction stopping device
CN109424667B (en) * 2017-08-29 2020-11-06 比亚迪股份有限公司 Disc brake and vehicle
CN109424668B (en) * 2017-08-29 2020-08-25 比亚迪股份有限公司 Disc brake and vehicle
CA3074756A1 (en) * 2017-09-06 2019-03-14 Shanghai Liupei Mechanical And Electrical Technology Co., Ltd Mechanical force-amplifying type motor-driven friction braking device for rail vehicle
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CN110406517A (en) * 2018-04-26 2019-11-05 陕西重型汽车有限公司 A kind of heavy-duty car electromechanical brake control system and its control method
CN110936974B (en) * 2018-09-21 2021-02-23 比亚迪股份有限公司 Brake, rail transit braking system and rail transit system
CN113039115A (en) * 2018-11-15 2021-06-25 株式会社万都 Apparatus and method for calculating absolute angular position for controlling steering system of vehicle
KR20200099729A (en) * 2019-02-15 2020-08-25 현대모비스 주식회사 Parking brake apparatus
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