CN104832566B - Brake apparatus and for operate be used for automatic parking brake brake apparatus method - Google Patents

Brake apparatus and for operate be used for automatic parking brake brake apparatus method Download PDF

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Publication number
CN104832566B
CN104832566B CN201510060146.XA CN201510060146A CN104832566B CN 104832566 B CN104832566 B CN 104832566B CN 201510060146 A CN201510060146 A CN 201510060146A CN 104832566 B CN104832566 B CN 104832566B
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CN
China
Prior art keywords
brake
plunger
main shaft
mainshaft nut
piston
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Application number
CN201510060146.XA
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Chinese (zh)
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CN104832566A (en
Inventor
D.布拉泰特
F.贝尔勒-米勒
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
Priority to DE102014202189.8 priority Critical
Priority to DE102014202189.8A priority patent/DE102014202189A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of CN104832566A publication Critical patent/CN104832566A/en
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Publication of CN104832566B publication Critical patent/CN104832566B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/14Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18Actuating 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/741Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on an ultimate actuator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00Type of actuator operation force
    • F16D2121/02Fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00Type of actuator operation force
    • F16D2121/02Fluid pressure
    • F16D2121/04Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00Type of actuator operation force
    • F16D2121/18Electric or magnetic
    • F16D2121/24Electric or magnetic using motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00Components of actuators
    • F16D2125/02Fluid-pressure mechanisms
    • F16D2125/06Pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00Components of actuators
    • F16D2125/18Mechanical mechanisms
    • F16D2125/20Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/36Helical cams, Ball-rotating ramps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00Components of actuators
    • F16D2125/18Mechanical mechanisms
    • F16D2125/20Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40Screw-and-nut

Abstract

The present invention relates to brake apparatus and for operating the method for being used for the brake apparatus of automatic parking brake.Brake apparatus for automatic parking brake includes the plunger that has the brake piston that can be arranged with axially being elapsed for accommodating the caliper shell of the inner cavity of fluid, in caliper shell along axis and can coaxially be arranged in brake piston passage in caliper shell.The task of present invention is to provide a kind of brake apparatus and a kind of method for operating the brake apparatus for automatic parking brake, reliably provides braking function in a simple manner.Brake apparatus is so constructed thus, so that plunger can hydraulically be transmitted to power on brake piston by the fluid in the inner cavity of caliper shell, and plunger can mechanically be transmitted to power on brake piston, wherein plunger(7)Main shaft can be passed through(6)And mainshaft nut(4)Power is transmitted to brake piston(3)On.

Description

Brake apparatus and for operate be used for automatic parking brake brake apparatus method
Technical field
Current invention is intended to a kind of brake apparatus and a kind of braking dress for operating for automatic parking brake The method set.
Background technique
A kind of automatic parking brake known from 10 2,004 046 871 A1 of DE is lived with brake piston, auxiliary The hydraulic cavities fill in, being arranged between brake piston and auxiliary piston, the spring element for pre-tightening auxiliary piston, by screw thread Connect the mainshaft mechanism being connected with auxiliary piston and the driver for mainshaft mechanism.In the lockup state of parking brake By mainshaft mechanism and spring-loaded auxiliary piston brake piston mechanically locking and in the release shape of parking brake Auxiliary piston is blocked by means of spring element and/or by means of mainshaft mechanism in state.Hydraulic stop for described here Hydraulic pressure is used for for vehicle braking system, and brake piston is expressed on brake(-holder) block.If the pressure that brake piston is defined Load then locks the terminal location in this position by means of above-mentioned electromechanical adjustment unit.As long as again from brake equipment Middle removing pressure, then brake piston is to enduringly generate braking effect together with frictional layer and brake(-holder) block.
Therefore it is required to provide the additional electromechanical adjustment unit of required pressure in above-mentioned apparatus.Additionally due to necessary Apply hydraulic pressure, and due to the brake fluid needed for must extracting first thus, so usually with high power demand Pump is necessary the hydraulic support of braking system.Another disadvantage is that in additional electromechanical adjustment unit or for taking out When the draw-out device of brake fluid being taken to fail, the function of parking brake cannot use or be possible to use completely completely.
Furthermore known system is so designed, so that it is until brake assemblies and corresponding motor-speed changer-unit The maximum temperature being defined and the minimum vehicle electronic circuit voltage being defined are capable of providing the clamping force of definition.If but automatic parking Brake operates in limit range, then it is necessary that brake is lightened the burden at hydraulic aspect, so as to further electromechanical ground locking Brake.Additional pump is also required to this.
Summary of the invention
Therefore the task of present invention is to provide a kind of brake apparatus and a kind of for operating for automatic parking brake The method of the brake apparatus of device reliably largely independent of temperature provides braking function in a simple manner.
The task is solved by a kind of brake apparatus for automatic parking brake.The brake apparatus includes:
Caliper shell with the inner cavity for accommodating fluid;
Brake piston, the brake piston can be arranged in caliper shell along axis with elapsing in the axial direction;And
Plunger, the plunger can be coaxially arranged in brake piston with being passed in caliper shell.According to the present invention, it makes Dynamic device is so constructed, so that power hydraulically can be transmitted to system by the fluid in the inner cavity of caliper shell by plunger In piston, and plunger can be transferred force to mechanically on brake piston, and wherein plunger can pass through main shaft and main shaft spiral shell Mother is transmitted to power on brake piston.
The invention further relates to press the method for mentioned-above brake apparatus and for executing tune in this way for operating Section or control mechanism.
In addition, the present invention relates to other preferred modifications.
It include as mentioned above, preferably having for holding for the brake apparatus according to the present invention of automatic parking brake Receive the caliper shell of inner cavity of fluid, the brake piston that can be arranged with axially elapsing in caliper shell along axis and The plunger that can be coaxially arranged in brake piston passage in caliper shell.Brake apparatus so constructs, so that plunger can lead to The fluid crossed in the inner cavity of caliper shell is hydraulically transmitted to power on brake piston, and plunger can be mechanically power It is transmitted on brake piston.Advantageously power is transmitted on brake piston by main shaft and mainshaft nut in other words can be with this for plunger Brake piston connection.
The disadvantages mentioned above of background technique is overcome by present invention.Brake apparatus according to the present invention is especially largely On independent of temperature work because brake fluid only by pressure-loaded without being extracted.It is furthermore possible to by according to this hair The special mechanical devices of bright brake apparatus and abandon for locking the additional of parking brake parking brake in other words Electromechanical adjustment unit and additional pump is abandoned, because plunger according to the present invention, which not only guarantees to reduce, is located at caliper shell The function of fluid volume in inner cavity(By considerably lessly using approximate incompressible fluid)And therefore guarantee to send out therewith The function of the raw hydraulic power transmitting to brake piston, and pass through mechanical effective connection by means of main shaft and mainshaft nut It ensure that the function of locking brake piston.Brake apparatus according to the present invention is simply kept in structure in this way, this Aspect ensure that steady and low-maintenance system and be on the other hand inexpensive.
Advantageously plunger is contained in main shaft, wherein plunger is connected through a screw thread with main shaft is connected and main shaft and master Axis nut is threadedly coupled by underloading(Leichtlauf-Gewindeverbindung)It is connected.Here plunger and main shaft it Between threaded connection be right-hand thread in other words left-hand thread and between main shaft and mainshaft nut underloading threaded connection be left spiral shell Line right-hand thread in other words.It is ensured that in this way, not only when shipping and reselling on another market that motor-speed changer-unit steering determines in other words Plunger and mainshaft nut is moved along the direction of brake(-holder) block.
Advantageously in the first step the moment of friction of the threaded connection between plunger and main shaft compared to main shaft and main shaft The moment of friction that underloading between nut is threadedly coupled is larger, thus by living from plunger by main shaft and mainshaft nut to braking Power transmitting beyond the Great Wall can generate the first clamping force, and the friction of the threaded connection between plunger and main shaft in the second step Torque is rubbed and the increase of the counter-force on automatic piston compared to what the underloading between main shaft and mainshaft nut was threadedly coupled Wiping torque is smaller, to can generate the second clamping force by hydraulic power transmitting.By this method for not changing driver It says in the case where no other controls power alternately from retarder purely mechanic first(Untersetzungsgetriebe) It is transferred to according to load on hydraulic retarder, this especially lightens the burden to main shaft drives.The institute in other words being wherein passed The clamping force of generation is braked at it in other words between each brake piston and brake(-holder) block to work between layer.
Setting has the pawl disk of lock pawl advantageously on mainshaft nut(Mitnehmerscheibe), thus with simple Mode implement automatically braking layer abrasion adjust again.Wherein lock pawl is acted as with the first caliper shell wall such one With so that the movement that mainshaft nut leaves the brake(-holder) block of parking brake is stopped.
Advantageously main shaft is supported on the second caliper shell wall by axial bearing.
Furthermore a kind of method and a kind of use for operating brake apparatus is provided in order to run the apparatus according to the invention Control mechanism in other words is adjusted in executing the corresponding of this method.
Detailed description of the invention
Other feature and utility of the invention is obtained from the explanation of embodiment with reference to the accompanying drawings.It is shown from attached drawing:
Fig. 1 is that a kind of part of brake apparatus of the form of implementation according to the present invention with the plunger in first position is cutd open View;
Fig. 2 is the partial cross of brake apparatus of the form of implementation according to the present invention with plunger in the second position Figure;And
Fig. 3 shows the time-based chart of electric current drawn about the release process of automatic parking brake.
Specific embodiment
First form of implementation of the invention is described with reference next to attached drawing.
Fig. 1 is shown for automatic(Automation)Parking brake(Parking brake)Brake apparatus 1 comprising have For accommodating the fluid caliper shell 2, brake piston 3, mainshaft nut 4, pawl disk 5 of the inner cavity 23 of brake fluid, master in other words Axis 6 especially thread spindle, plunger 7, tensioner ring 8 and ship and resell on another market 9.Brake apparatus 1 is configured in such a manner, so that plunger 7 can occupy first It sets(See Fig. 1)The second position and(See Fig. 2)Multiple second positions in other words, wherein plunger 7 is by means of being set in the second position It sets and hydraulically power is transmitted on brake piston 3 in the brake fluid in inner cavity 23.Furthermore brake apparatus 1 is so constructed, so as to It is enough mainshaft nut 4 bring into in directly contact of brake piston 3 and thus power from by motor-speed changer-unit(Not It shows)Shipping and reselling on another market for being driven is transmitted on brake piston 3 by plunger 7, main shaft 6, mainshaft nut 4 and is therefore transmitted to accordingly Brake layer(It is not shown)Corresponding brake(-holder) block in other words(It is not shown)On.
Caliper shell 2 include it is towards brake(-holder) block, with for accommodating brake piston 3 first opening 21a first End 21 and away from brake(-holder) block, with for accommodate ship and resell on another market 9 second opening 22a the second end 22.
Brake piston 3 is at it towards having on the side of the second end 22 for being at least partially accommodated mainshaft nut 4, main The blind hole of axis 6 and plunger 7 and the brake piston are open in 21a first and can axially be arranged and prolong with elapsing along axis A' It reaches in inner cavity 23.Brake piston 3 is sealed about caliper shell 2(It is not shown).Furthermore brake piston 3 is so constructed, from And it can be at least partially accommodated the mainshaft nut 4 of substantially open tubular column barrel-shaped structure.The correspondingly direction the of mainshaft nut 4 The upside of one end 21 is matched with the corresponding inner surface of brake piston 3.Furthermore mainshaft nut 4 has effect on their outer circumference Face, the acting surface so be located at brake piston 3 blind hole inner surface on acting surface collective effect, thus in brake piston Mainshaft nut 4 but only non-rotatably moves in the axial direction in 3.Furthermore mainshaft nut 4 has the first underloading spiral shell in its inner circumferential Line 41 is correspondingly lightly loaded 63 collective effect of screw thread with the second of main shaft 6.
Furthermore mainshaft nut 4 has and 5 collective effect of pawl disk on side of its bottom side i.e. towards the second end 22 Pawl 44.
Pawl disk 5 with the inner wall with caliper shell 2, make jointly in other words by the first caliper shell wall for this purpose Lock pawl 51 and furthermore there is hole 52, pawl 44 extends through the hole.Wherein pawl 44 is so made with pawl disk 5 jointly With so that pawl 44 is overcoming depending on pawl 44 when mainshaft nut 4 is moved along the direction of first end 21 upwards Pawl disk 5 is pulled together along the direction of first end 21 after the idle running of length.Wherein lock pawl 51 so with 5 phase of pawl disk Connection, thus the lock pawl not stop in this move upwards, but moved downward in pawl disk(Along the second end 22 Direction)When stop.Then when the braking layer and brake piston 3 for exhausting parking brake over time main shaft in other words Nut 4 must further along the direction of brake(-holder) block elapse to reach desired clamping force when, just realization pawl disk along The movement in the direction of brake(-holder) block.By this method by pawl disk 5 implement automatically braking layer abrasion adjust again, hereinafter into One step specifically illustrates its function.
Main shaft 6 has the first end 61 towards the first opening 21 and the second end 62 towards the second opening 22.? Main shaft 6 has the diameter that becomes larger in the range of two ends 62, and wherein main shaft 6 is substantially(Hierarchically)In open tubular column barrel-shaped structure. Furthermore main shaft 6 is in the second end 22(Away from the side of brake(-holder) block)Range in caliper shell is supported on by axial bearing 64 On the second caliper shell wall and thus wall is rotatably disposed in caliper shell 2 in other words around axis A'.? The first seal that main shaft 6 is sealed relative to caliper shell 2 is provided in the range of two ends 62 on the periphery of main shaft 6 65 and thus fluid is maintained in the inner cavity 23 of caliper shell 2.Especially on top i.e. in the range of first end 61 Main shaft 6 has on their outer circumference is lightly loaded screw thread 63 with the first underloading screw thread 41 coefficient second of mainshaft nut 4.It is lightly loaded spiral shell Line driving can be for example made of ball-screw.Furthermore main shaft 6 has the coefficient internal screw thread of external screw thread 71 with plunger 7 66.Second seal 67 is set in the corresponding groove of main shaft 6 in the main shaft 6 in other words upper area of plunger 7, so as to handle The two component opposing seals.Furthermore main shaft 6 has tensioner ring 8 on its interior diameter in the range of the second end 62, along The axial movement of the direction limitation plunger 7 of the second end 22, to hinder plunger 7 to rotate from caliper shell 2 in operation Out.
Plunger 7 be substantially column casing columnar structure and be connected through a screw thread and along being axially movable contained in main shaft 6 In.This outer plunger 7 has hole 72 coaxial about axis A', to be designed to blind hole.Plunger 7 is so accommodated in main shaft 6, To which plunger 7 passes through the threaded connection between plunger 7 and main shaft 6 about caliper shell 2 in other words about main shaft 6(Outer spiral shell Line 71, internal screw thread 66)It can be moved into inner cavity 23 and in 9 motor-speed changer-unit direction of rotation in other words of shipping and reselling on another market It can be moved out from inner cavity 23 when transformation.
It can be torsionally connected in other words with plunger 7 by motor-speed changer-unit driving 9 through holes 72 of shipping and reselling on another market It is accommodated in plunger, but shipping and reselling on another market can axially elapse relative to plunger 7.By this axial direction passage property and Threaded connection between plunger 7 and main shaft 6 can be being translated not only to plunger 7 about main shaft 6 by rotation provided by 9 of shipping and reselling on another market Translational motion and also mainshaft nut 4 can be converted into pass through the threaded connection of plunger 7 and main shaft 6 and main shaft 6 and main shaft spiral shell The translational motion that the underloading of mother 4 is threadedly coupled.
In order to guarantee the functionality of the apparatus according to the invention, that is, to be guaranteed, when 9 direction of rotation of shipping and reselling on another market determines Not only plunger 7 but also mainshaft nut 4 is moved along the direction of brake(-holder) block, the threaded connection between plunger 7 and main shaft 6 must be Right-hand thread in other words left-hand thread and between main shaft 6 and mainshaft nut 4 underloading threaded connection be left-hand thread right spiral shell in other words Line.The two screw threads are set as right-hand thread or the two screw threads are set as left-hand thread in terms of the device not have Impossible when integrated others transmission assembly, but this be also it is contemplated that.
The diameter of plunger 7 is smaller compared to the diameter of brake piston 3 in current form of implementation, i.e., on plunger 7 Hydraulic counter-pressure with the end face 73 of plunger 7 relative to the end face of brake piston 3 ratio compared to the back-pressure on brake piston 3 Power is smaller.Driver for plunger 7 accordingly can be designed weaker.The ratio of the two end faces defines hydraulic transformer Speed-up ratio(Übersetzungsverhältnis).In order to which the stroke that transmission force is passed through accurately is determined according to reversed ratio Justice, i.e. plunger 7 must correspondingly pass through longer stroke.
In order to operate brake apparatus 1, automatic parking brake passes through motor-speed changer-unit handle turn in other words in operation Pin 9 is placed in rotation.It is antitorque and driving force can be transmitted to axially with respect to the plunger 7 for 9 movements of shipping and reselling on another market and can pass through axial direction On the main shaft 6 that bearing 64 rotationally places, because the moment of friction that " standard " between plunger 7 and main shaft 6 is threadedly coupled is compared The moment of friction that underloading between main shaft 6 and mainshaft nut 4 is threadedly coupled is higher.Through mainshaft nut 4 in brake piston 3 Antitorque connection, mainshaft nut 4 now axially along the direction of the first end 21 of caliper shell 2 towards brake(-holder) block transport It is dynamic.The idle running between mainshaft nut 4 and brake piston 3 is overcome first by the rotation of main shaft 6(Not yet contact)And it is contacting When brake piston 3 along brake(-holder) block direction elapse.Wherein main shaft 6 is supported on caliper shell 2 by means of axial bearing 64 On the side of brake(-holder) block.Clamping force is mechanically transmitted before at the time point.
It is delivered in that the counter-force constructed on brake(-holder) block is more by power, then the underloading speed change between main shaft 6 and mainshaft nut 4 Device is more difficult to run, and to the last no longer rotates.If reaching the point, pass through corresponding actuator(It is not shown)For example by Hydraulic connecting for providing operation braking function is set and passes through valve outward(It is not shown)It interrupts.Such as it can be in corresponding arrangement sealing Hydraulic inner cavity 23 is closed in the case where part and the brake fluid supply for passing through the movement of plunger 7.The valve control of electronics in this case Mechanism processed is unnecessary.Therefore various other stereomutations in the inner cavity of caliper shell 2 23 also cause pressure to become Change.
In addition, mainshaft nut 4 along the movement in the direction of brake(-holder) block cause definition and pawl 44 length it is related between Lock pawl 51 away under it is servo-actuated.Wherein lock pawl 51 is supported on the inside of caliper shell 2.
As long as by moment of friction of the tensioning process between plunger 7 and main shaft 6 compared in main shaft 6 and mainshaft nut 4 Between the moment of friction that is threadedly coupled of underloading it is lower, then-continue to provide torque-plunger 7 most due to motor-speed changer-unit Start to rotate in main shaft 6 eventually and axial movement is wherein executed by screw thread.Reduced in inner cavity 23 by the feeding of plunger 7 Hydraulic volume, to pressure rise occur in caliper shell 2.And the raising of pressure acts on brake piston 3, edge The direction of brake(-holder) block squeeze it and thus mainshaft nut 4 lightened the burden.Speed change will be equally lightly loaded by the way that mainshaft nut 4 is lightened the burden Device Reduction of Students' Study Load, so that main shaft 6 can rotate again, because the moment of friction that underloading is threadedly coupled now is lower again.In the time Point plunger 7 does not continue to move relative to main shaft 6.By this method for constant driving no other controls the case where Lower that power is alternately transferred on hydraulic retarder from retarder purely mechanic first according to load, this especially drives main shaft Dynamic Reduction of Students' Study Load.As long as the underloading speed changer between mainshaft nut 4 and main shaft 6 is consumingly made by " block " enough in other words again Only, plunger 7 is just further elapsed into inner cavity 23.As long as reaching desired clamping force, motor-speed changer-unit stops; Parking brake locking.
Motor-speed changer-unit is driven through corresponding control mechanism for release process(It is not shown)Along Opposite direction is steered, thus underloading speed changer movement first.I.e. mainshaft nut 4 moves simultaneously along the direction of the second end 22 And brake piston 3 is discharged again.By axial movement mainshaft nut of mainshaft nut 4 overcome it is related with the length of pawl 44 Idle running after contact with pawl disk 5 and attempt by its equally along the second end 22 direction extruding.But because pawl Disk 5, by 51 stop of lock pawl, is blocked along the direction of motion so being lightly loaded speed changer.Additionally since torque 9 is applied by shipping and reselling on another market Add, so final plunger 7 is pulled back its initial position again, the plunger is blocked by tensioner ring 8 on initial position.
By the pawl disk 5 with lock pawl 51 not only along the lift for unclamping direction limitation mainshaft nut 4, and furthermore Layer abrasion has been automatically carried out to adjust again.When exhausting braking layer over time, then also can reliably mention in this way For desired clamping force.Therefore reference point is the braking system being tensioned always.It is fixed by the length of pawl 44 to unclamp path Justice.
Furthermore release stroke need not be measured, it can be by control mechanism conduct because being had based on current characteristics when unclamping Open circuit control(Abschaltsteuerung)The specific indicatrix used(See Fig. 3).
As seen in Figure 3, electric current is consumingly increased when connecting first in section A.
Turn-on current declines again in section B and motor-speed changer-unit provides torque.
In the intermediate stage(Zwischenplateau)Later, wherein can also also measure other minimums in some cases Electric current increase, electric current is further lowered into idle running electric current in section C.Intermediate stage " median rise " basis respectively in other words The steady runnability of the apparatus according to the invention described above, thread pitch, clamping force region by varying strength are expressed.It is right In with small thread pitch the main shaft 6 steadily operated and system for the median rise outreach obtain(ausfallen)Compared with It is small.Then equally smaller or it can be actually unable in detecting, parking brake is traveled out from the state of no-load It comes.Just when driver operates brake pedal when unclamping and therefore the mechanical devices of parking brake is unloaded very much by force E.g. such case.
If only underloading screw thread is effective, idle running electric current itself is adjusted in section D.Then motor must only be certainly Body drives speed changer and underloading screw thread.
When the gap between mainshaft nut 4 and pawl disk 5 is overcome, then rotary motion is passed from underloading screw thread automatically Plunger 7 is delivered in other words on the screw thread of main shaft 6.The screw thread of the main shaft 6 in other words of plunger 7 be relatively be difficult to by(Compared to underloading Screw thread), this can become obvious by the electric current raising in section E and F.
If the screw thread of plunger 7 also reaches end stop(Tensioner ring 8), then electric current further increases, as visible in section G As.Release process can be terminated now.The current curve of characterization can be analyzed so and be used to control disconnected Road time point.Wherein made the raising and the pawl mechanical device end stop of plunger 7 in other words of electric current by means of tensioner ring 8 Rigidity is proportional.That is, this transition for example can " soft " be designed by means of structural device;Then electric current liter High smaller and component load(That is, final stage)It is smaller.
Furthermore optionally, stroke measurment/stroke assessment(As in known systems)It is also possible.This is usually such Design increases to not occur other electric current(Section G), because of the previous quilt in the stroke of evaluated/measurement of release process It interrupts.

Claims (9)

1. being used for the brake apparatus of automatic parking brake(1), including
With the inner cavity for accommodating fluid(23)Caliper shell(2);
Brake piston(3), the brake piston is in caliper shell(2)In along axis(A')It can set with elapsing in the axial direction It sets;And
Plunger(7), the plunger is in caliper shell(2)In can be coaxially in brake piston(3)It is arranged with being passed, feature exists In brake apparatus(1)It is so constructed, thus plunger(7)By in caliper shell(2)Inner cavity(23)In fluid can Power is hydraulically transmitted to brake piston(3)On, and plunger(7)Brake piston can mechanically be transferred force to(3)On, Middle plunger(7)Main shaft can be passed through(6)And mainshaft nut(4)Power is transmitted to brake piston(3)On.
2. brake apparatus described in accordance with the claim 1(1), which is characterized in that plunger(7)It is accommodated in main shaft(6)In, and Plunger(7)And main shaft(6)It is connected through a screw thread and is connected, and main shaft(6)And mainshaft nut(4)Phase is threadedly coupled by underloading Connection.
3. brake apparatus according to claim 2(1), which is characterized in that in plunger(7)And main shaft(6)Between screw thread Connection is right-hand thread either left-hand thread, and in main shaft(6)And mainshaft nut(4)Between underloading threaded connection be left-hand thread Either right-hand thread.
4. according to brake apparatus described in claim 2 or 3(1), which is characterized in that in plunger(7)And main shaft(6)Between spiral shell The moment of friction of line connection is in the first step compared in main shaft(6)And mainshaft nut(4)Between underloading be threadedly coupled Moment of friction is larger, thus by from plunger(7)Via main shaft(6)And mainshaft nut(4)To brake piston(3)On it is mechanical Power transmitting can generate the first clamping force, and in plunger(7)And main shaft(6)Between threaded connection moment of friction second Pass through brake piston in step(3)On counter-force increase and compared in main shaft(6)And mainshaft nut(4)Between underloading screw thread The moment of friction of connection is smaller, to can generate the second clamping force by hydraulic power transmitting.
5. according to brake apparatus described in any one of claims 1 to 3(1), which is characterized in that in mainshaft nut(4)On set Having set has lock pawl(51)Pawl disk(5).
6. brake apparatus according to claim 5(1), which is characterized in that lock pawl(51)So with the first caliper shell Body wall collective effect, thus mainshaft nut(4)The movement for leaving the brake(-holder) block of parking brake is stopped.
7. according to brake apparatus described in any one of claims 1 to 3(1), which is characterized in that main shaft(6)Pass through axial axis It holds(64)It is supported on the second caliper shell wall.
8. for operating according to brake apparatus described in any one of claims 1 to 7(1)Method.
9. for executing adjusting or control mechanism according to the method for claim 8.
CN201510060146.XA 2014-02-06 2015-02-05 Brake apparatus and for operate be used for automatic parking brake brake apparatus method Active CN104832566B (en)

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DE102014202189.8A DE102014202189A1 (en) 2014-02-06 2014-02-06 Brake device and method for operating a braking device for an automatic parking brake

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CN111350777A (en) * 2018-12-21 2020-06-30 比亚迪股份有限公司 Brake, rail transit braking system and rail transit system
CN110486393B (en) * 2019-07-27 2021-01-15 浙江师范大学 Self-energizing wire control actuator
CN110469602B (en) * 2019-07-27 2021-02-02 浙江师范大学 Self-energizing wire control actuator
CN110486394B (en) * 2019-07-27 2021-01-15 浙江师范大学 Self-energizing wire control actuator
CN110454522B (en) * 2019-07-27 2021-01-15 浙江师范大学 Self-energizing wire control actuator
CN110469600B (en) * 2019-07-27 2021-01-15 浙江师范大学 Self-energizing wire control actuator

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CN1301331A (en) * 1998-05-18 2001-06-27 Skf工程研究中心公司 Screw actuator and brake calliper comprising such actuator
CN201262205Y (en) * 2008-08-19 2009-06-24 浙江亚太机电股份有限公司 Actuating mechanism of electronic-mechanical braking system
CN101980907A (en) * 2007-11-27 2011-02-23 大陆-特韦斯贸易合伙股份公司及两合公司 Brake actuation unit

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CN1301331A (en) * 1998-05-18 2001-06-27 Skf工程研究中心公司 Screw actuator and brake calliper comprising such actuator
CN101980907A (en) * 2007-11-27 2011-02-23 大陆-特韦斯贸易合伙股份公司及两合公司 Brake actuation unit
CN201262205Y (en) * 2008-08-19 2009-06-24 浙江亚太机电股份有限公司 Actuating mechanism of electronic-mechanical braking system

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