DE112019005759T5 - ELECTROMECHANICAL ACTUATOR PACKAGE FOR OPERATING A BRAKE ARRANGEMENT - Google Patents

Abstract

An electromechanical actuator package for actuating a brake assembly configured to actuate a vehicle brake comprises: a motor; a differential operably connected to the engine, the differential including a pulley and an output connectable to the brake assembly; and a lock mechanism configured to lock the pulley of the differential, the lock mechanism comprising: a base configured to be movable, a plurality of protrusions protruding from the movable base, the protrusions a first protrusion and a second protrusion, with at least a portion of the pulley positioned between the first and second protrusions protruding from the movable base, a solenoid assembly disposed adjacent to at least one of the protrusions, the solenoid assembly being operably associated with at least one of the protrusions , and one or more springs operably coupled to the moveable base and / or at least one of the protrusions.

Description

Technical area

Various embodiments of the present disclosure relate to an electrically operated brake system and in particular to an electromechanical actuator package for driving a brake arrangement, for example, but not limited to, a brake caliper.

State of the art

A braking system for a motor vehicle, and in particular an automotive vehicle, functionally reduces the speed of the vehicle or keeps the vehicle in a rest position. Various types of braking systems are commonly used in automotive vehicles, including hydraulic, anti-lock or "ABS", as well as electrical or "brake-by-wire" systems. For example, in a hydraulic braking system, the hydraulic fluid transfers energy from a brake pedal to a brake pad to slow or stop the rotation of a wheel of the vehicle. Electronics regulate the hydraulic fluid in the hydraulic brake system. In the electric brake system, the application and release of the brake is controlled by an electric signal from an electric caliper.

These electrical brake systems usually include an electromechanical actuator that is either connected to a brake caliper via a cable, such as the “drum in head” (drum in the disc chamber), or is attached directly to the brake caliper. The actuator converts electrical energy into rotating mechanical output to move the rope or worm drive and apply the brakes. In general, the electromechanical actuator includes a motor and a gear / belt system. Typically, either a few large gears or many small gears for the gear system, one or more belts for the belt system, or a combination thereof are needed to achieve the necessary load transfer.

With these and other general considerations in mind, the following embodiments are described. Although relatively specific problems are discussed, it should be understood that the embodiments should not be limited to solving the specific problems identified in the prior art.

epiphany

Technical task

Various embodiments of the present disclosure provide an electromechanical actuator package for driving a brake assembly.

Technical solution

The features and advantages of the present disclosure will become more readily understood and apparent from the following detailed description, which should be read in conjunction with the accompanying drawings, and from the claims appended to the end of the detailed description.

According to some embodiments of the present disclosure, an electromechanical actuator package for actuating a brake assembly configured to actuate a vehicle brake may include: a motor; a differential operably connected to the engine, the differential including a pulley and an output connectable to the brake assembly; and a lock mechanism configured to lock the pulley of the differential, the lock mechanism comprising: a base configured to be movable, a plurality of protrusions protruding from the movable base, the protrusions a first protrusion and a second protrusion, with at least a portion of the pulley positioned between the first and second protrusions protruding from the movable base, a solenoid assembly disposed adjacent to at least one of the protrusions, the solenoid assembly being operably associated with at least one of the protrusions , and one or more springs operably coupled to the moveable base and / or at least one of the protrusions.

The base of the lock mechanism may be configured to be rotatable such that rotation of the base can cause the first and second protrusions of the lock mechanism to engage or disengage from the pulley of the differential.

The one or more springs may be configured to urge at least one of the projections towards the pulley of the differential. The solenoid assembly may be configured to move at least one of the projections away from the pulley of the differential by applying an electromagnetic field to at least one of the projections. For example, the one or more springs be configured to rotate the base and / or at least one of the projections in a first direction, at least one of the projections engaging the pulley of the differential. The solenoid assembly may be configured to rotate the base and / or the at least one of the projections in a second direction different from the first direction in order to disengage at least one of the projections from the pulley of the differential.

The first projection of the locking mechanism can be positioned outside of the pulley of the locking mechanism, and the second projection of the locking mechanism can be positioned below or above the pulley of the locking mechanism.

One end of one of the springs may be coupled to a groove formed on the base of the locking mechanism and another end of one of the springs may be coupled to a hole formed in a housing of the electromechanical actuator package.

The electromagnet assembly can include a core and a coil. The core of the electromagnet assembly may include arms, and at least one of the projections may be positioned between the arms of the core of the electromagnet assembly. The solenoid assembly may be electrically wired in parallel with the motor.

The electromechanical actuator package can furthermore comprise a circuit which is designed to supply energy to the electromagnet arrangement. The one or more springs may be configured to rotate the base or at least one of the protrusions of the locking mechanism in a first direction, at least one of the protrusions of the locking mechanism engaging the pulley of the differential, and the solenoid assembly may be configured to: to rotate at least one of the protrusions of the locking mechanism in a second direction different from the first direction in response to the supplied energy.

The differential may include: a sun gear attached to the pulley; a first ring gear attached to a housing of the electromechanical actuator package; a second ring gear adapted to be rotatable and comprising the output connectable to the brake assembly; and planet gears supported by the first and second ring gears and the sun gear. It is possible that the differential does not include a carrier for the planetary gears. The planet gears can be arranged within the pulley and the first and second ring gears. The planet gears can be configured to be rotatable about the sun gear and the second ring gear can be configured to be rotatable by the planet gears. The difference between the number of teeth on the first ring gear and the number of teeth on the second ring gear is the number of planet gears. Each of the planetary gears includes a first portion operably associated with the fixed first ring gear and a second portion operably associated with the rotatable second ring gear.

This summary is provided to introduce, in a simplified form, a selection of terms that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to limit the scope of the claimed subject matter.

Advantageous Effects of the Invention

The electromechanical actuator package according to the various embodiments of the present disclosure can effectively drive a brake assembly, for example a brake caliper.

Figure list

• 1 eine perspektivische Ansicht eines elektromechanischen Aktuatorpakets, gekoppelt an eine Bremsanordnung gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung, zeigt;
• 2 eine Querschnittsansicht eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 3 eine auseinandergezogene Ansicht eines Differenzials eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 4 eine Querschnittsansicht einer Anordnung einer Riemenscheibe und eines Sonnenrades eines Differenzials eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 5 eine Querschnittsansicht eines Differenzials eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 6 eine auseinandergezogene Ansicht einer Anordnung eines Gehäuses und eines ersten und zweiten Ringrades eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 7 eine Querschnittsansicht einer Anordnung eines Gehäuses und eines festen und drehbaren Ringrades eines Differenzials eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 8 eine perspektivische Unteransicht eines festen Ringrades eines Differenzials eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 9 eine perspektivische Unteransicht eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 10 eine Querschnittsansicht eines elektromechanischen Aktuatorpakets, gekoppelt an eine Bremsanordnung gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung, zeigt;
• 11-13 transparente und perspektivische Ansichten einer Anordnung eines Sperrmechanismus, eines Gehäuses und einer Riemenscheibe eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigen;
• 14 eine auseinandergezogene Ansicht einer Anordnung eines Sperrmechanismus, einer Riemenscheibe und eines Gehäuse eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 15 einen eingerückten Zustand eines Sperrmechanismus und einer Riemenscheibe eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 16 einen ausgerückten Zustand eines Sperrmechanismus und einer Riemenscheibe eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 17 eine Teilansicht eines Sperrmechanismus und einer Riemenscheibe eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 18 eine Teilansicht eines Gehäuses mit Drahtfedern eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt;
• 19 eine teilweise Draufsicht eines Gehäuses eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt; und
• 20 eine teilweise Unteransicht eines Gehäuses eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung zeigt.
• 21-22 zeigen eine Teilansicht eines Gehäuses mit einer Elektromagnetanordnung eines elektromechanischen Aktuatorpakets gemäß einer beispielhaften Ausführungsform der vorliegenden Offenbarung.

Various embodiments of the present disclosure will be described with reference to the drawings, in which:

• 1 FIG. 10 shows a perspective view of an electromechanical actuator package coupled to a brake assembly in accordance with an exemplary embodiment of the present disclosure; FIG.
• 2 FIG. 11 shows a cross-sectional view of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure;
• 3 FIG. 11 shows an exploded view of a differential of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure;
• 4th FIG. 10 is a cross-sectional view of an assembly of a pulley and a sun gear of a differential of an electromechanical actuator pack in accordance with an exemplary embodiment of the present disclosure; FIG.
• 5 FIG. 10 shows a cross-sectional view of a differential of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure;
• 6th FIG. 10 is an exploded view of an assembly of a housing and first and second ring gears of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure; FIG.
• 7th Figure 12 shows a cross-sectional view of an assembly of a housing and a fixed and rotatable ring gear of a differential of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure;
• 8th Figure 12 shows a bottom perspective view of a fixed ring gear of a differential of an electromechanical actuator pack in accordance with an exemplary embodiment of the present disclosure;
• 9 Figure 12 shows a bottom perspective view of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure;
• 10 FIG. 10 shows a cross-sectional view of an electromechanical actuator package coupled to a brake assembly in accordance with an exemplary embodiment of the present disclosure;
• 11-13 show transparent and perspective views of an assembly of a locking mechanism, a housing, and a pulley of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure;
• 14th FIG. 11 is an exploded view of an assembly of a locking mechanism, pulley, and housing of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure; FIG.
• 15th Figure 12 shows an engaged state of a lock mechanism and pulley of an electromechanical actuator pack in accordance with an exemplary embodiment of the present disclosure;
• 16 Figure 12 shows a disengaged state of a lock mechanism and pulley of an electromechanical actuator pack in accordance with an exemplary embodiment of the present disclosure;
• 17th FIG. 10 is a partial view of a lockout mechanism and pulley of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure; FIG.
• 18th FIG. 12 shows a partial view of a housing with wire springs of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure; FIG.
• 19th FIG. 10 shows a partial top view of a housing of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure; FIG. and
• 20th 10 shows a partial bottom view of a housing of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure.
• 21-22 show a partial view of a housing with an electromagnet arrangement of an electromechanical actuator package according to an exemplary embodiment of the present disclosure.

Corresponding reference numerals and symbols in the various figures generally relate to corresponding parts, unless otherwise indicated. The figures are drawn to clearly illustrate the relevant aspects of the embodiments and are not necessarily drawn to scale.

Best mode for implementing the invention

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which there is shown by way of illustration specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it will be understood that other embodiments may be used and that structural, logical, and electrical changes may be made without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not to be taken in a limiting sense, and the scope of the invention is to be defined solely by the appended claims and the equivalents thereof. The same numbers in the figures denote the same components, which should be obvious from the context of use.

1 FIG. 14 illustrates a perspective view of an electromechanical actuator package coupled to a brake assembly in accordance with an embodiment of the present disclosure. As in 1 shown, an electromechanical actuator package 100 directly to a brake assembly, for example, but not limited to, a brake caliper 110 , mounted or indirectly connected to it. The electromechanical actuator package 100 can be designed to use the caliper 110 to operate or drive. The electromechanical actuator package 100 can through a Actuator output 260 from 2 the caliper 110 Apply braking force. The electromechanical actuator package 100 can be attached to the caliper 110 coupled to our use of a variety of ways to apply the brakes. For example, the actuator output 260 from 2 of the electromechanical actuator package 100 on a ball ramp or screw mechanism of the brake caliper 110 be attached to generate axial force to apply a brake. The electromechanical actuator package 100 can be mounted on any suitable part of a vehicle, including the frame, bodywork, and trim components.

2 FIG. 10 shows a cross-sectional view of an electromechanical actuator package in accordance with an exemplary embodiment of the present disclosure.

One engine 220 can be firmly in a housing 210 be mounted. The motor 220 can in the one in the housing 210 formed tubular cavity and can be arranged on a lower part of the housing 210 be attached. The motor 220 can be an electric motor and comprises a motor rotor shaft 222 . The drive pulley 224 can be attached to the motor rotor shaft 222 attached or directly to the motor rotor shaft 222 be trained. The drive pulley 224 may have an outer surface that mates with an inner surface of a drive belt 242 intervenes. The outer surface of the drive pulley 224 may have any suitable contour or texture to aid in gripping contact between the drive belt 242 and the drive pulley 224 to ensure. For example, the outer surface of the toothed belt pulley 224 and the inner surface of the drive belt 242 include toothed mating projections and / or notches formed therein. The drive pulley 224 may alternately have teeth and grooves on its outer surface, with alternating grooves and teeth on the inner surface of the drive belt 242 are designed to be engaged.

The drive pulley 224 the motor rotor shaft 222 is rotatably engaged with a differential 240 . The differential 240 can be designed to take torque from the engine 220 to multiply to the brake actuator 110 , for example a brake caliper, via the actuator output 260 Apply braking force.

In the exemplary embodiment of 2 can the differential 240 a pulley 310 , a sun gear 320 , a first ring gear 330 , a second ring gear 340 and planet gears 350 include.

The pulley 310 of the differential 240 can be a driven pulley. The drive pulley 224 the motor rotor shaft 222 and the driven pulley 310 of the differential 240 are over the drive belt 242 rotatably connected to each other. Each of the drive pulley 224 and the driven pulley 310 has an outer surface that mates with an inner surface of the drive belt 242 intervenes. The surfaces of the drive pulley 224 and the driven pulley 310 may have any suitable contour or texture to aid in gripping contact between the strap 242 and the discs 224 , 310 to ensure. For example, the surfaces of the pulleys 224 and 310 and the inside surface of the belt 242 include mating toothed projections and / or notches formed therein. The drive belt 242 fits around the outer circumference of the drive pulley relatively precisely 224 and the driven pulley 310 appropriate. This causes the drive pulley to rotate 224 the motor rotor shaft 222 one rotation of the driven pulley 310 of the differential 240 . The diameters of the pulleys 224 and 310 can be of any suitable dimension to provide a desired gear ratio such that the speed of rotation of the drive pulley 224 the motor rotor shaft 222 the speed of rotation of the driven pulley 310 of the differential 240 is different.

Instead of the drive belt 242 can use the drive pulley 224 the motor rotor shaft 222 and the driven pulley 310 of the differential 240 rotatable or operable directly or connected to one another by one or more gears and / or belts and / or a combination thereof.

The sun gear 320 can on the pulley 310 be attached. For example, is a pen axis 360 in a press fit in the pulley 310 and the sun gear 320 mounted to the sun gear 320 firmly to the pulley 310 to pair as in the 4th and 5 shown.

A variety of planetary gears 350 are through the sun gear 320 driven. The planet gears 350 synchronize the first (or fixed) ring gear 330 with the second (or rotatable) ring gear 340 . The planet gears 350 are with the sun gear 320 , the first (or fixed) ring gear 330 and the second (or rotatable) ring gear 340 geared or engaged. The thickness of the planet gears 350 can be equal to or greater than the sum of the thickness of the first (or fixed) ring gear 330 and the thickness of the second (or rotatable) ring gear 340 be. Each of the Planetary gears 350 may have a fixed section (e.g., an upper section) that corresponds to the fixed ring gear 330 is operably associated, and a second portion (e.g., a lower portion) associated with the rotatable ring gear 340 operable assigned include.

The first or fixed ring gear 330 has internal teeth and can be firmly attached to the housing 210 be coupled. Since the first ring gear 330 on the housing 210 is attached, leads the first ring gear 330 no moveable or rotatable operations in the differential 240 the end. The first ring gear 330 can be fixed to the housing in any suitable manner 210 be connected, for example by one or more clips or snaps, which are in the first ring gear 330 and / or the housing 210 are integrally formed, or screws. The second or rotating ring gear 340 has internal teeth and can be rotated in the housing 210 be arranged. The difference between the number of teeth on the first ring gear 330 and the number of teeth of the second ring gear 340 can be the number of planet gears 350 be. Depending on the necessary condition for the differential 240 can be the number of teeth of the first ring gear 330 greater than the number of teeth of the second ring gear 340 be. Alternatively, the number of teeth of the first ring gear 330 smaller than the number of teeth of the second ring gear 340 be.

An exit cap 410 can on the fixed ring gear 330 or the case 210 under the rotating ring wheel 340 be installed around the rotating ring gear 340 to cover. The rotating ring wheel 340 is rotatable or movable between the output cap 410 (or the case 210 ) and the fixed ring gear 330 arranged.

For example, the exit cap 410 by screws 412 firmly to the fixed ring gear 330 coupled. The fixed ring gear 330 can be one or more legs 332 with threaded holes into which the screws 412 fit as in 8th shown. The screws 412 can pass through holes made in the exit cap 410 are formed, and into the holes of the legs 332 of the fixed ring gear 330 be rotated.

Heads 413 of the screws 412 can in corresponding holes 416 formed on one side (for example, the rear side) of a housing of the brake caliper 110 , fit, as in 10 shown. This ensures that the torque absorbed when the vehicle is parked is grounded or into the housing of the brake caliper 110 and not through the case 201 of the electromechanical actuator package 100 , which can be made of plastic, can be introduced. In other words, the torque maintained during parking can be provided by the electromechanical actuator package 100 in the housing of the brake caliper 110 and not through the case 210 of the electromechanical actuator package 100 be transmitted. In addition, the exit cap 410 a pen 414 have, inserted into an in the housing 201 formed hole to ensure correct alignment of the exit cap 410 to ensure.

The rotating ring wheel 340 can be the harmonic planetary gear arrangement of the differential 240 Provide output torque. The rotating ring wheel 340 can the actuator output 260 be assigned. The actuator output 260 can be on one side of the rotating ring wheel 340 directly formed (or molded) or fixed to the rotatable ring gear 340 be coupled. The actuator output 260 may have various shapes that adhere to part of the brake assembly 110 can be coupled. For example, the actuator output 260 be designed as a projection extending from one side of the rotatable ring gear 340 extends, for example a toothed, threaded or splined shaft to prevent or minimize play when turning. Alternatively, the actuator output 260 be designed as a tooth, thread or wedge bore which can accommodate part of the brake assembly to prevent or minimize play when turning. In the exemplary embodiment, the actuator output 260 of the electromechanical actuator package 100 on a ball ramp or screw mechanism of the brake caliper 110 be attached to generate axial force to apply a brake.

In operation, the operable rotates on the driven pulley 310 coupled motor 220 the driven pulley 310 , and that on the driven pulley 310 attached sun gear 320 comes together with the driven pulley 310 turned. The sun gear 320 causes the planetary gears 350 to move in the same direction as the sun gear 320 to turn, but due to the fixed ring gear 330 at a reduced speed. The fixed ring gear 330 and the rotating ring gear 340 can have a different number of teeth, the difference being equal to the number of planet gears 350 is. The difference in the number of teeth is achieved by modifying the operating pressure angle of the internal teeth so that the gear has fewer teeth (preferably the rotatable ring gear 340 ) engages at a higher pressure angle than that with more teeth. Consequently when the planet gears arrive 350 rotate the teeth of the planetary gears 350 in mesh with the teeth of the fixed ring gear 330 and the rotatable ring gear 340 , and for every rotation of the planet gears 350 becomes the rotating ring wheel 340 moved forward by those teeth that correspond to the number of planet gears 350 correspond. Consequently, the overall ratio of the gear train is the ratio of the speed of the sun gear 320 to the planet gears 350 , multiplied by the number of teeth on the rotating ring gear 340 , divided by the number of planet gears 350 . For example, the sun gear 320 20th Teeth open, the planetary gear 350 has nineteen (19) teeth on that fixed ring gear 330 has fifty-five (55) teeth and the rotatable ring gear 340 has sixty (60) teeth. In this example, the stage gear ratio of the planetary gear is 3.75: 1, the gear ratio of the harmonic gear is 12: 1, and the overall gear ratio is 45: 1. The harmonic planetary gear arrangement of the differential 240 may not require a carrier for the planetary gears 350 as the planet gears 350 can be operated with the sun gear 320 and the fixed ring gear 330 and the rotatable ring gear 340 are connected. As a result, the efficiency of the harmonic planetary gear arrangement of the differential 240 higher than with conventional gear arrangements, for example a double planetary gear arrangement. Additionally you need the planet gears 350 may not have a hole for a shaft to be coupled to a carrier.

The number of planet gears 350 can from the required torque output of the electromechanical actuator package 100 depend. The rotating ring wheel 340 has fewer internal teeth than the fixed ring gear 330 exhibit. A high reduction ratio can be achieved by using the rotatable ring gear 340 fewer internal teeth than the fixed ring gear 330 having. Alternatively, the rotatable ring gear 340 more internal teeth than the fixed ring gear 330 exhibit.

The harmonic planetary gear arrangement of the differential 240 can have fewer components and can cost less than conventional gear assemblies. In addition, the gear arrangement of the differential 240 axially compact and thin, and can have high torque capacity in a small package due to the increased number of planetary gears and high gear ratio.

wobei T_R-F die Anzahl der Zähne des ersten (oder festen) Ringrades 330 ist, und T_S ist die Anzahl der Zähne des Sonnenrades 320.The stage gear ratio GRP of the planetary gear is calculated using equation (1): $${\text{GR}}_{\text{P.}}=\left({\text{T}}_{\text{R.}-\text{F.}}{\text{/ T}}_{\text{S.}}\right)+1$$

where T _{RF is} the number of teeth of the first (or fixed) ring gear 330 and T _S is the number of teeth on the sun gear 320 .

wobei T_R-R die Anzahl der Zähne des zweiten (oder drehbaren) Ringrades 340 ist, T_R-F ist die Anzahl der Zähne des ersten (oder festen) Ringrades 330, und N_P ist die Anzahl der Planetenräder 350.The gear ratio GRH of the harmonic gear is calculated using equation (2): $${\text{GR}}_{\text{H}}={\text{T}}_{\text{R.}-\text{R.}}\text{/}\left|\left({\text{T}}_{\text{R.}-\text{R.}}-{\text{T}}_{\text{R.}-\text{F.}}\right)\right|{\text{where T}}_{\text{R.}-\text{R.}}={\text{T}}_{\text{R.}-\text{F.}}\pm {\text{N}}_{\text{P.}}$$

where T _{RR is} the number of teeth of the second (or rotatable) ring gear 340 is, T _RF is the number of teeth on the first (or fixed) ring gear 330 , and N _P is the number of planet gears 350 .

wobei GR_P das Stufenübersetzungsverhältnis des Planetengetriebes ist, und GRH ist das Stufenübersetzungsverhältnis des harmonischen Getriebes.The gear ratio of the differential's harmonic planetary gear arrangement 240 GR _RHGS is calculated using equation (3): $${\text{GR}}_{\text{RHGS}}={\text{GR}}_{\text{P.}}\ast {\text{GR}}_{\text{H}}$$

where GR _{P is} the step gear ratio of the planetary gear, and GRH is the step gear ratio of the harmonic gear.

The output torque from the actuator output 260 of the electromechanical actuator package 100 can be set depending on the specific torque requirements or be scalable that the torque of the motor 220 , the diameters of the pulleys or gears and / or the belts or the gear reduction ratio can be varied. The reduction ratio (or the ratio of 1 / diameter or speed) between the drive pulley 224 the motor rotor shaft 222 and the actuator output 260 can be, for example, but not limited to, equal to or greater than 1:25. According to some embodiments of the present disclosure, the harmonic planetary gear arrangement of the differential 240 improve mechanical efficiency and reduce the size and mass of the assembly.

An electromechanical parking brake mechanism of the self-releasing type can be made up of components that cannot self-lock during parking brake operation. The self-releasing type electromechanical parking brake mechanism can move the brake assembly 110 allow from the imposition of a force or a moment, if the applied force or moment exceeds a certain level. A ball screw type brake assembly having a screw spindle and a nut integrated with balls, an example of the self-releasing type electromechanical parking brake mechanism, has low friction for holding the parking brake. Therefore no electromechanical parking brake mechanism from self-releasing type require a mechanism to maintain the tension of the parking brake. A self-locking type electromechanical parking brake mechanism may also require a supplemental force to maintain parking braking.

According to some embodiments of the present disclosure, the electromechanical actuator package may 100 a locking mechanism 250 include. The locking mechanism 250 can be designed to use the differential 240 to lock. For example, the locking mechanism 250 if necessary prevent the pulley from moving 310 of the differential 240 rotates, for example, but not limited to, when a vehicle is parked. The locking mechanism 250 is in the housing 210 of the electromechanical actuator package 100 positioned. For example, as in the 11 and 12th shown is the locking mechanism 250 under the pulley 310 of the differential 240 .

The locking mechanism 250 can be a base 510 with a variety of protrusions 520 , an electromagnet assembly 530 and one or more springs 540 include.

The base 510 is designed to be in response to or in connection with an electromagnetic field generated by the electromagnet assembly 530 as well as from the feathers 540 provided restoring force to be movable. The base 510 is rotatable on an axis 515 coming from an inner surface of the case 210 protrudes, coupled or attached to the housing 210 attached and can rotate around the axis 515 turn. For example, the axis 515 in the housing 210 be shaped. The base 510 the locking mechanism 250 is designed to be rotatable so that the rotation of the base 510 the protrusions 520 the base 510 can cause with the pulley 310 of the differential 240 to engage or disengage from it.

The protrusions 520 stand from the rotating base 510 towards the pulley 310 of the differential 240 before. For example, the protrusions have 520 Pin shapes or any shape that goes with the pulley 310 may engage, or may be the pulley 310 Provide braking or locking torque when the projections 520 the pulley 310 to contact.

At least part of the pulley 310 of the differential 240 is between the protrusions 520 arranged. The protrusions 520 can be on opposite sides of the rotating base 510 located or be trained. For example, there is a first ledge 521 outside the pulley 310 the locking mechanism 250 positioned, and a second protrusion 522 is under (or over) the pulley 310 the locking mechanism 250 positioned so part of the pulley 310 of the differential 240 between the first ledge 521 and the second protrusion 522 the locking mechanism 250 can be positioned. The denser the protrusions 520 are positioned relative to each other, the higher the braking or locking torque on the pulley 310 be applied. In the embodiment of the present disclosure, the pulley 310 of the differential 240 an extension 315 have by a toothed portion of the pulley 310 in the direction of the locking mechanism 250 is extended, so the extension 315 the pulley 310 with the protrusions 520 the rotating base 510 can come into engagement. The locking mechanism 250 can under the extension 315 the pulley 310 be positioned. The pulley 310 and the protrusions 520 are for example made of metal, without being limited to this, in order to avoid high wear.

One or more feathers 540 can be operable on the movable base 510 and / or at least one of the projections 520 be coupled. For example, are on a surface of the base 510 Grooves 512 trained, and the feathers 540 are on one of the grooves 512 the base 510 coupled. Alternatively, the springs 540 to one of the protrusions 520 be coupled. As in 15th and 16 shown is one end of the spring 540 into the groove 512 the rotating base 510 used, and as in 18th illustrated is the other end of the spring 540 to a hole 710 from the 19th and 20th coupled, formed in the housing 210 of the electromechanical actuator package 100 . The case 210 has grooves or spaces 730 on that the wire springs 540 allow the rotatable base to move between the engaged and disengaged positions 510 to turn.

The feathers 540 can be designed to include at least one of the protrusions 520 towards the pulley 310 of the differential 240 to urge to the pulley 310 of the differential 240 to brake or lock when the solenoid assembly 530 the electromagnetic field does not affect the protrusions 520 applies. For example are the feathers 540 designed to be the base 510 and / or the protrusions 520 in a first direction 600 from 15th to rotate so that the protrusions 520 with the pulley 310 of the differential 240 get into engagement. Accordingly, the springs 540 the protrusions 520 the base 510 urge into contact with the pulley 310 of the differential 240 to come and on the extension 315 the pulley 310 to rest (normally indented state). Accordingly locks when the circuit 270 the electrical energy does not pass to the electromechanical Actuator package 100 supplies, the locking mechanism 250 the differential 240 so that the one with the brake assembly 110 connected actuator output 260 cannot be moved or rotated.

The electromagnet assembly 530 can at least one of the protrusions 520 the base 510 be arranged adjacent. For example, like the 21 and 22nd shown the electromagnet assembly 530 in the housing 210 mounted and positioned so that the electromagnet assembly 530 the protrusions 520 the rotating base 510 spanned on both sides. The electromagnet assembly 530 can have a core 532 and a coil 534 include. The core 532 the electromagnet assembly 530 can be made of metal. The core 532 the electromagnet assembly 530 may comprise two or more arms, and the projections 520 the base 510 can between the arms of the core 534 the electromagnet assembly 530 be positioned. The sink 534 can be at the center of the core 532 be wrapped.

The electromagnet assembly 530 is at least one of the protrusions 520 the base 510 operable assigned. The electromagnet assembly 530 is designed to generate the electromagnetic field what the protrusions 520 the rotating base 510 forces oneself in a second direction 610 from 16 to turn to the restoring force of the springs 540 overcome so that the ledges 520 who have favourited the pulley 310 contact, off the pulley 310 can be disengaged. That from the electromagnet assembly 530 generated electronic magnetic field can at least one of the protrusions 520 from the pulley 310 of the differential 240 against the force of the springs 540 move away. Accordingly, the electromagnet assembly 530 the base 510 and / or at least one of the projections 520 in the second direction 610 rotate to at least one of the protrusions 520 the locking mechanism 250 from the pulley 310 of the differential 240 disengage, and consequently the electromechanical actuator package 100 and the brake assembly 110 can be released from the locked state.

For example, as in 2 shown the electromagnet assembly 530 parallel to the motor 220 wired. The circuit 270 is electrically connected to a wire that holds the electromagnet assembly 530 and the engine 220 connects so the circuit 270 the energy at the same time of the electromagnet assembly 530 and the engine 220 feeds or separates. Accordingly, if the circuit 270 the engine supplies the energy 220 actuated, and the solenoid assembly 530 is switched on. When the circuit 270 which does not provide energy, both are the engine 220 as well as the electromagnet assembly 530 switched off.

The circuit 270 may, mounted thereon, comprise any suitable circuit and electronic components, for example a microprocessor. The circuit 270 can be inside or outside the case 210 of the electromechanical actuator package 100 are located. The circuit 270 can be designed to run the engine 220 and the solenoid assembly 530 to control, for example, but not limited to, the engine 220 and the solenoid assembly 530 Supply power to the operation of the motor 220 and the solenoid assembly 530 enable or disable and the speed of the motor 220 and / or the direction of rotation of the motor 220 vary.

In operation when the circuit 570 the energy not of the electromagnet assembly 530 feeds, generates the electromagnet assembly 530 not that on the ledges 520 the base 510 applied electronic magnetic field, and the springs 540 crowd the rotating base 510 in the first direction 600 so that the protrusions 520 the base 510 in engagement with the pulley 310 of the differential 240 as in 15th shown. The engagement of the projections 520 the base 510 and the pulley 310 of the differential 240 by the force of the springs 540 can turn the pulley 310 of the differential 240 in the second direction 610 prevent and consequently the braking arrangement 110 , coupled to the output 260 of the differential 240 , lock. When the circuit 570 the energy of the electromagnet assembly 530 feeds, generates the electromagnet assembly 530 the electromagnetic field and apply it to the protrusions 520 the rotating base 510 and turns the rotating base 210 with the protrusions 520 in the second direction 610 so that the protrusions 520 the base 510 from the pulley 310 of the differential 240 move out as in 16 shown. The electromagnet assembly 530 releases the locked state of the pulley 310 of the differential 240 .

In an assembly process of the electromechanical actuator package 100 become the feathers 540 into the one in the housing 210 formed holes 710 used. The following is the solenoid assembly 530 in the in the housing 210 trained seat 720 inserted so that the springs 540 between the arms of the core 532 the electromagnet assembly 530 are arranged. Then the assembly letters 550 into the mounting holes 740 of the housing 210 screwed to the solenoid assembly 530 on the housing 210 to fix. The rotating base 510 with the protrusions 520 is on the axis 515 inserted, molded or inserted into the housing 210 , and one end of the spring 540 is in the groove 512 the base 510 used. Before installing the pulley 310 into the electromechanical actuator package 100 it may be necessary to operate the solenoid assembly 530 to consider. For example, if the electromagnet assembly 530 is supplied with power, the rotating base must 510 in response to that from the solenoid assembly 530 generated electromagnetic field in the second direction 610 be rotated to by the springs 540 to be released from the lock.

While the exemplary embodiments have been described in detail, it should be understood that various changes, substitutions, and modifications can be made herein without departing from the spirit and scope of the application as defined in the appended claims.

Furthermore, the scope of protection of the present application is not intended to be limited to the specific embodiments of the process, the machine, the production and the composition of matter, means, methods and steps described in the description. As those skilled in the art will readily appreciate from the disclosure, processes, machines, manufacture, compositions of matter, means, methods, and steps that currently exist or are later to be developed may perform substantially the same function or result in substantially the same result achieve such as the respective embodiments described herein, may be used in accordance with the embodiments and alternative embodiments. Accordingly, the appended claims are intended to encompass such processes, machines, manufacture, compositions of matter, means, methods or steps within their scope.

Claims (20)

Electromechanical actuator package for actuating a brake arrangement configured to actuate a vehicle brake, comprising: a motor; a differential operably connected to the engine, the differential including a pulley and an output connectable to the brake assembly; and a locking mechanism configured to lock the differential pulley, the locking mechanism comprising: a base designed to be movable a plurality of protrusions protruding from the movable base, the protrusions including a first protrusion and a second protrusion, at least a portion of the pulley being positioned between the first and second protrusions protruding from the movable base, a solenoid assembly disposed adjacent to at least one of the protrusions, the solenoid assembly operably associated with at least one of the protrusions, and one or more springs operably coupled to the moveable base and / or to at least one of the protrusions. Electromechanical actuator package according to Claim 1 wherein the base of the locking mechanism is configured to be rotatable such that rotation of the base causes the first and second protrusions of the locking mechanism to engage or disengage from the pulley of the differential. Electromechanical actuator package according to Claim 1 wherein the one or more springs are configured to urge at least one of the projections toward the pulley of the differential. Electromechanical actuator package according to Claim 1 wherein the solenoid assembly is configured to move at least one of the projections away from the pulley of the differential by applying an electromagnetic field to at least one of the projections. Electromechanical actuator package according to Claim 2 wherein the one or more springs are configured to rotate the base and / or at least one of the protrusions in a first direction, with at least one of the protrusions engaging the pulley of the differential. Electromechanical actuator package according to Claim 5 wherein the solenoid assembly is configured to rotate the base and / or the at least one of the projections in a second, different from the first direction, second direction to disengage at least one of the projections from the pulley of the differential. Electromechanical actuator package according to Claim 1 wherein the first projection of the locking mechanism is positioned outside of the pulley of the locking mechanism and the second projection of the locking mechanism is positioned below or above the pulley of the locking mechanism. Electromechanical actuator package according to Claim 1 wherein one end of one of the springs is coupled to a groove formed on the base of the locking mechanism and another end of one of the springs is coupled to a hole formed in a housing of the electromechanical actuator package. Electromechanical actuator package according to Claim 1 , wherein the electromagnet assembly comprises a core and a coil, and the core of the Electromagnet assembly includes arms, and at least one of the projections is positioned between the arms of the core of the electromagnet assembly. Electromechanical actuator package according to Claim 1 , further comprising a circuit configured to supply power to the solenoid assembly, wherein: the one or more springs are configured to rotate the base or at least one of the protrusions of the locking mechanism in a first direction, wherein at least one of the protrusions of the locking mechanism engages the pulley of the differential, and the solenoid assembly is adapted to rotate at least one of the protrusions of the locking mechanism in a second direction, different from the first direction, in response to the applied energy. Electromechanical actuator package according to Claim 1 wherein the differential comprises: a sun gear attached to the pulley; a first ring gear attached to a housing of the electromechanical actuator package; a second ring gear adapted to be rotatable and comprising the output connectable to the brake assembly; and planet gears supported by the first and second ring gears and the sun gear. Electromechanical actuator package according to Claim 11 , wherein the differential does not include a carrier for the planetary gears. Electromechanical actuator package according to Claim 11 wherein the planet gears are disposed within the pulley and the first and second ring gears. Electromechanical actuator package according to Claim 11 wherein: the planetary gears are adapted to be rotatable about the sun gear, and the second ring gear is adapted to be rotatable by the planetary gears. Electromechanical actuator package according to Claim 11 , wherein the difference between the number of teeth of the first ring gear and the number of teeth of the second ring gear is the number of planet gears. Electromechanical actuator package according to Claim 1 wherein the electromagnet assembly is electrically wired in parallel with the motor. Electromechanical actuator package according to Claim 10 wherein each of the planetary gears includes a first portion operably associated with the fixed first ring gear and a second portion operably associated with the rotatable second ring gear. Electromechanical actuator package for actuating a brake arrangement configured to actuate a vehicle brake, comprising: a differential comprising: a pulley, a sun gear attached to the pulley, a first ring gear attached to a housing of the electromechanical actuator package, a second ring gear adapted to be rotatable and comprising an output connectable to the brake assembly; and Planet gears supported by the first and second ring gears and the sun gear; and a locking mechanism configured to lock the pulley, the locking mechanism comprising: a base designed to be movable a plurality of protrusions protruding from the movable base, the protrusions including a first protrusion and a second protrusion, at least a portion of the pulley being positioned between the first and second protrusions protruding from the movable base, a solenoid assembly disposed adjacent to at least one of the protrusions, the solenoid assembly operably associated with at least one of the protrusions, and one or more springs operably coupled to the moveable base and / or to at least one of the protrusions. Electromechanical actuator package according to Claim 11 , wherein the differential does not include a carrier for the planetary gears. Electromechanical actuator package according to Claim 11 wherein: the planetary gears are adapted to be rotatable about the sun gear, and the second ring gear is adapted to be rotatable by the planetary gears.

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