WO2024067906A1 - Actionneur pour fournir un écoulement de fluide et une autre fonction d'actionnement - Google Patents

Actionneur pour fournir un écoulement de fluide et une autre fonction d'actionnement Download PDF

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Publication number
WO2024067906A1
WO2024067906A1 PCT/DE2023/100634 DE2023100634W WO2024067906A1 WO 2024067906 A1 WO2024067906 A1 WO 2024067906A1 DE 2023100634 W DE2023100634 W DE 2023100634W WO 2024067906 A1 WO2024067906 A1 WO 2024067906A1
Authority
WO
WIPO (PCT)
Prior art keywords
freewheel
actuator
output shaft
rotation
rotor
Prior art date
Application number
PCT/DE2023/100634
Other languages
German (de)
English (en)
Inventor
Peter Greb
Laszlo Man
Original Assignee
Schaeffler Technologies AG & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2024067906A1 publication Critical patent/WO2024067906A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission
    • F16H63/3441—Parking locks engaging axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H61/0025—Supply of control fluid; Pumps therefore
    • F16H61/0031—Supply of control fluid; Pumps therefore using auxiliary pumps, e.g. pump driven by a different power source than the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission

Definitions

  • the present invention relates to an actuator for providing a fluid flow for cooling and/or lubrication as well as an additional actuation function with only one electric motor drive and no other active switching elements.
  • an actuator for clutch actuation with a motor module and an actuation module is known, which can be a mechanical module or a hydraulic module.
  • an electric pump actuator for actuating a parking lock with a hydraulic, double-acting cylinder-piston unit is known. What the two patents have in common is that the actuators used are only designed to provide a fluid flow. Consequently, the actuators known from the prior art only provide cooling or lubrication or hydraulic pressure.
  • the present invention is based on the object of at least partially overcoming the disadvantages known from the prior art and in particular of providing an actuator which, in addition to providing a fluid flow, provides an actuating function purely mechanically in order to avoid hydraulic losses and for reasons of robustness and which can be adapted to the requirements of different tasks by varying the properties of the actuating function of simple components.
  • the actuator according to the invention with a further actuation function comprises an electromotive drive accommodated in an actuator housing, with a stator and a drive rotor rotatable about an axis of rotation, and a fluid delivery device, wherein a delivery rotor of the fluid delivery device is connected in a rotationally fixed manner to the drive rotor, an eccentric via a first freewheel is arranged on a drive shaft coaxial to the axis of rotation and connected to the conveyor rotor, with a freewheel lever being mounted indirectly via a second freewheel on an output shaft, the eccentric at least indirectly stimulating the freewheel lever to an oscillating movement in the circumferential direction of the output shaft, and thereby driven linear actuating element and / or a rotationally driven actuating element is guided out of the actuator housing.
  • first”, “second”, ...) primarily serve (only) to distinguish between several similar objects, sizes or processes, i.e. in particular no dependency and/or order of these objects, sizes or prescribe processes to each other. If a dependency and/or sequence is required, this is explicitly stated here or it will be obvious to the person skilled in the art when studying the specifically described embodiment.
  • a freewheel also called an overrunning clutch, is a clutch that only works in one direction of rotation.
  • a freewheel can only transmit torque in one direction of rotation. If the direction of rotation is reversed or if the speed of the part that is actually being driven is greater than that of the driving part, the connection is automatically released.
  • the linearly driven actuating element is an actuating plunger and the rotationally driven actuating element is the output shaft.
  • the output shaft can be mounted indirectly on the actuator housing via a third freewheel.
  • the actuator housing preferably comprises a base body, a first cover-like housing body and a second cover-like housing body.
  • the base body of the actuator housing has a pot-like shape and includes a receiving space for the electric motor drive.
  • the first and second lid-like base bodies per are each attached opposite to each other on the cup-shaped ends of the base body.
  • the first cover-like housing base body has a first hydraulic connection and the second cover-like housing base body has a second hydraulic connection.
  • a fluid delivery device can be a turbomachine or a positive displacement machine (pump).
  • the delivery rotor of the fluid delivery device is connected in a rotationally fixed manner to the drive shaft arranged coaxially to the axis of rotation. Consequently, the drive shaft is at least indirectly connected to the drive rotor in a rotationally fixed manner.
  • the eccentric or a cam is connected to the drive shaft via the first freewheel.
  • an axially displaceable and oscillating push rod rests with a first end on the peripheral surface of the eccentric and is arranged with the other end on the freewheel lever.
  • the push rod can preferably be arranged orthogonally to the axis of rotation, alternatively an oblique orientation of the push rod relative to the axis of rotation is also preferred.
  • the eccentric transmits a linearly oscillating stroke to the freewheel lever, which is arranged indirectly and coaxially on the output shaft via the axially displaceably mounted push rod running radially on it. Due to the first freewheel, the output shaft is driven via the push rod and the freewheel lever only in a first direction of rotation of the drive shaft or of the electric motor drive. In a second direction of rotation, the first freewheel is overtaken, so that only the fluid delivery device is driven, whereby only the cooling or lubricating function is realized.
  • the second freewheel is arranged in the center of rotation of the freewheel lever between the freewheel lever and the output shaft.
  • the freewheel lever and the second freewheel thus carry out an oscillating rotary movement of the freewheel lever around the output shaft, whereby this rotary movement is transmitted intermittently to the output shaft exclusively in a first actuation direction due to the second freewheel.
  • the output shaft is in turn supported via the preferably third freewheel on the actuator housing, in particular on the second cover-like housing body. This means that the output shaft is secured against rotation in the opposite direction to the actuation direction by the third freewheel during the return stroke of the second freewheel, triggered by a return stroke of the push rod.
  • the output shaft is preferably guided out of the actuator housing at least at one end.
  • a seal is provided between the actuator housing and the output shaft.
  • the angle of rotation of the output shaft is detected directly or indirectly by a sensor, wherein the sensor also preferably controls the electric motor drive via electronic components, so that the electric motor drive can be activated or deactivated depending on the rotation of the output shaft.
  • the sensor preferably detects the angle of rotation of the output shaft directly.
  • the angle of rotation of the output shaft can also be detected indirectly, in which the sensor determines the adjustment of other components connected to the output shaft, wherein these values are converted into an angle of rotation of the output shaft by the electronic components.
  • a fourth freewheel is arranged between the conveyor rotor and the drive shaft, the fourth freewheel being mounted in the opposite direction of action as the first freewheel.
  • the fluid delivery device is therefore not driven during the actuation function of the output shaft.
  • the radial surface of the eccentric and the contact surface of the end of the push rod resting on it are designed to be particularly low-friction.
  • a particularly low-friction surface is characterized by a high level of smoothness, i.e. a surface with few elevations.
  • the term low-friction is preferably understood to mean that the material pairing of the radial surface of the eccentric and the contact surface of the end of the push rod resting on this end has a coefficient of sliding friction of less than 0.12. Reducing the friction in the contact area between the push rod and the eccentric leads to a reduction in friction losses as well as an increase in the life expectancy of both Components.
  • the eccentric preferably has a higher hardness than the push rod, since material loss can be better compensated for by moving the push rod forward without impairing the function of the device or reducing the axial displacement of the push rod.
  • the first freewheel and/or the second freewheel and/or the third freewheel and/or the fourth freewheel are preferably identical in construction. A standardization of the freewheels leads to cheaper procurement costs or manufacturing costs, which means that the actuator can be manufactured more cost-effectively.
  • a return spring which counteracts the axial and oscillating movement of the push rod and the freewheel lever in the direction facing away from the axis of rotation is preferably provided.
  • the return spring acts directly on the freewheel lever so that the return stroke of the freewheel lever is carried out safely in the freewheel direction, i.e. opposite to the actuation direction of the second freewheel, and the push rod is permanently held in contact with the eccentric or the cam.
  • the return spring is supported with one end on the actuator housing, more precisely on the second cover-like housing base body, and with the other end on the freewheel lever.
  • Fig. 1 a longitudinal section of an actuator known from the prior art
  • Fig. 2 a schematic representation of an example of a modular actuator
  • Fig. 3 a schematic representation of the example of an actuator for additional actuation of a parking brake
  • Fig. 4 a schematic sectional view of the example of a modular actuator for additional actuation of a parking brake according to Figure 3.
  • a modular actuator 1 with an actuator housing 2 is known from the prior art.
  • the actuator housing 2 includes a cup-like housing base body 3.
  • the cup-like housing base body 3 includes a receiving space for an electric motor drive 5.
  • the electric motor drive 5 comprises a stator 6, in which a drive rotor 7 is rotatably arranged.
  • the electric motor drive 5 is controlled via an electronic module 8.
  • the electronic module 8 includes a circuit board 9 with different electronic components 10.
  • the circuit board 9 is arranged within a first cover-like housing body 4, which has an electrical connection 13.
  • the first lid-like housing body 4 is attached to the pot-like housing base body 3 from the left with the circuit board 9 and the electronic components 10 in Figure 1.
  • the modular actuator 1 also comprises a hydraulic module 25 with a fluid conveying device 18.
  • the fluid conveying device 18 comprises a propeller-like or screw-like conveying rotor 19.
  • the fluid conveying device 18 is designed as a turbomachine.
  • the conveying rotor 19, which can also be referred to as a pump wheel when a pump is used as the fluid conveying device, is essentially arranged within the drive rotor 7.
  • the conveying rotor 19 is connected to the drive rotor 7 in a rotationally fixed manner.
  • the conveying rotor 19 is thus driven via the drive rotor 7.
  • An existing bearing of the drive rotor 7 is used for the conveying rotor 19.
  • a separate bearing of the conveying rotor 19 is not required.
  • the electric motor drive 5 further comprises a ring magnet 20.
  • the ring magnet 20 is arranged in Figure 1 in an axial direction between the circuit board 9 and the conveyor rotor 19 of the fluid conveying device 18.
  • the stator 6 of the electric motor drive 5 comprises a stator overmolding 21.
  • the stator overmolding 21 comprises a tubular extension 22 which extends from the stator 6 to the left in Figure 1 through a corresponding through hole in the circuit board 9.
  • the term axial refers to a rotation axis 23 of the drive rotor 7 of the electric motor drive 5.
  • the rotation axis 23 of the drive rotor 7 advantageously coincides with a flow direction 27 of a flow channel 26.
  • the flow channel 26 extends in Figure
  • a first hydraulic connection 11 is provided on a second lid-like housing body 14, which is arranged opposite to the first lid-like housing body 4 on the other side of the housing base body 3.
  • the second cover-like housing base body 14 comprises a tubular connection body 15, which is surrounded by an annular connection space 16.
  • the actuator 1 according to FIG. 2 differs, among other things, from the actuator 1 according to FIG.
  • the conveying rotor 19 of the fluid conveying device 18 is connected in a rotationally fixed manner to a drive shaft 30 arranged coaxially to the axis of rotation 23. Consequently, the drive shaft 30 is indirectly connected in a rotationally fixed manner to the drive rotor 7 (see FIG. 1 ) and extends out of the space surrounding the fluid delivery device 18.
  • an eccentric is connected to the drive shaft 30 via a first freewheel 31 32 or a cam connected.
  • the eccentric 32 transmits a linearly alternating or oscillating stroke to a freewheel lever 34, which is arranged indirectly and coaxially on an output shaft 36, via an axially displaceably mounted push rod 33 running radially thereon.
  • the output shaft 36 represents a rotationally driven actuating element which is led out of the actuator housing.
  • the output shaft 36 is arranged parallel to the drive shaft 30. However, orientations that deviate from this are also preferred, for example a skewed arrangement of the output shaft 36 relative to the drive shaft 30.
  • the output shaft 36 is driven by the first freewheel 31 only in a first direction of rotation of the electromotive drive 5. In a second direction of rotation of the drive shaft 30, the first freewheel 31 is overtaken, so that only the fluid delivery device 18 is driven, whereby a cooling and/or lubricating function is realized.
  • a second freewheel 35 is arranged in the center of rotation of the freewheel lever 34 between the freewheel lever 34 and the output shaft 36.
  • An oscillating rotary movement of the freewheel lever 34 is thus carried out by means of the freewheel lever 34 and the second freewheel 35, this rotary movement being transmitted intermittently to the output shaft 36 exclusively in a first actuation direction A due to the second freewheel 35.
  • the output shaft 36 is in turn supported on the actuator housing 2, in particular on the second cover-like housing body 14, via a preferably third freewheel 38, as shown in Fig. 4. This means that the output shaft 36 is secured against rotation against the actuation direction A in the return stroke of the second freewheel 35, triggered by a return stroke of the push rod 33.
  • a return spring 37 acts on the freewheel lever 34 so that the return stroke in the freewheel direction B, i.e. opposite to the actuation direction A of the second freewheel 35, is carried out safely and the push rod 33 is held in contact with the eccentric 32 or the cam.
  • the return spring 37 is supported, although not shown, with one end on the actuator housing 2 or on the second cover-like housing base body 14 and with the other end on the freewheel lever 34.
  • the output shaft 36 is led out of the actuator housing 2 through a seal (not shown). Thus, it can perform a rotating actuation function in the external area wherein a torque is transmitted intermittently via the output shaft 36 at least in the actuation direction A.
  • a sensor 39 is provided on the housing side to detect the angle of rotation or the average rotational speed of the output shaft 36.
  • the fluid conveying device 18 or the conveying rotor 19 of the fluid conveying device 18 is driven via a fourth, intermediate freewheel 40 between the conveying rotor 19 and the drive shaft 30, wherein the fourth freewheel 40 is mounted in the opposite direction of action to the first freewheel 31.
  • the fluid conveying device 18 is not driven during the actuating function of the output shaft 36.
  • FIG. 3 and 4 show a schematic representation of the actuator 1 according to the invention for providing a fluid flow and an additional actuation of a further element (not shown), such as a parking brake, by means of a linear actuation element.
  • a further element such as a parking brake
  • the electric motor drive 5 is driven in a first direction of rotation in which the first freewheel 31 transmits torque to the eccentric 32.
  • the push rod 33 is pushed away from the axis of rotation 23 of the eccentric 32 by the rising eccentric 32 and the second freewheel 35 is rotated in the torque-transmitting actuation direction A, whereby the output shaft 36 is also rotated by a corresponding angle of rotation.
  • an output lever 41 is arranged in a rotationally fixed manner, on which a coaxially rotatably mounted roller 42 is mounted.
  • the axis of rotation of the roller 42 is stacked horizontally to the axis of rotation of the output shaft 36.
  • the roller 42 is in turn mounted in a guide 43, which allows a vertical displacement the role 42 in the leadership 43 enables.
  • the guide 43 itself is non-positively connected on one side to an actuating plunger 44, which represents the linear actuating element, the actuating plunger 44 being mounted in an axially displaceable manner orthogonally to the output shaft 36 in the actuator housing 2.
  • the sensor 39 determines the displacement of the actuating plunger 44 and not the rotation of the output shaft 36.
  • direct sensing of the output shaft 36 is also preferred.
  • the sensor 39 detects when the parking brake is almost fully activated, thus reaching the state in which the output lever 41 is rotated maximally in the direction of the actuating plunger 44. This corresponds to a rotation of 180° compared to the illustration in FIG , with the output shaft 36 still being held by the third freewheel 38.
  • the output shaft 36 only needs to be led out of the actuator housing if it is to be used next to the actuating plunger for further actuation.
  • the electric motor drive 5 can remain at a standstill in this state or can be driven in a second direction of rotation in order to operate the cooling and/or lubricating function. Due to the first freewheel 31, the parking brake is not influenced by. This position represents the opened state of the parking brake.
  • the electric motor drive 5 is driven again in the first direction of rotation, so that the parking brake exceeds the previously described dead center, with a restoring torque acting on the output shaft 36 in the freewheeling direction B via the return spring (not shown). Since this restoring torque acts in the actuation direction A and thus in the freewheeling direction of the second and third freewheels 35, 38 after the dead center has been exceeded, the output shaft 36 can be freely rotated by the return spring, so that the parking brake can close quickly until it reaches its dead center in the closed position, as shown in Fig. 3, and remains stable there. To close the parking lock, all that is necessary is to exceed the open dead center of the parking lock.
  • the reverse may also be the case, with the pre-tensioned state representing the closed state and the state according to Fig. 3 representing the open state of the parking brake.
  • the device is not fixed in this respect.
  • Actuator housing Housing base body First cover-like housing body Electromotive drive
  • Circuit board electronic component first hydraulic connection second hydraulic connection electrical connection second cover-like housing body tubular connection body annular connection space fluid conveying device conveying rotor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne un actionneur (1) ayant une autre fonction d'actionnement, ledit actionneur comprenant : un entraînement électromoteur (5) logé dans un boîtier d'actionneur (2), l'entraînement électromoteur (5) comprenant un stator (6) et un rotor d'entraînement (7) qui peut tourner autour d'un axe de rotation (23) ; et un dispositif de transport de fluide (18), un rotor de transport (19) du dispositif de transport de fluide (18) étant relié au rotor d'entraînement (7) pour une rotation conjointe avec celui-ci, un excentrique (32) étant positionné, par l'intermédiaire d'une première roue libre (31), sur un arbre d'entraînement (30) qui est relié, coaxialement à l'axe de rotation (23), au rotor de transport (19), un levier de roue libre (34) étant monté indirectement sur un arbre de sortie (36) par l'intermédiaire d'une seconde roue libre (35), l'excentrique (32) amenant le levier de roue libre (34) au moins indirectement à se déplacer de manière oscillante dans la direction périphérique de l'arbre de sortie (36), et un élément d'actionnement linéaire entraîné par ledit mouvement oscillant et/ou un élément d'actionnement entraîné en rotation étant guidé hors du boîtier d'actionneur (2).
PCT/DE2023/100634 2022-09-27 2023-08-31 Actionneur pour fournir un écoulement de fluide et une autre fonction d'actionnement WO2024067906A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022124760.0 2022-09-27
DE102022124760.0A DE102022124760B3 (de) 2022-09-27 2022-09-27 Aktuator zur Bereitstellung eines Fluidflusses sowie einer weiteren Betätigungsfunktion

Publications (1)

Publication Number Publication Date
WO2024067906A1 true WO2024067906A1 (fr) 2024-04-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2023/100634 WO2024067906A1 (fr) 2022-09-27 2023-08-31 Actionneur pour fournir un écoulement de fluide et une autre fonction d'actionnement

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DE (1) DE102022124760B3 (fr)
WO (1) WO2024067906A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2574815A1 (fr) * 2011-09-30 2013-04-03 Siemens Aktiengesellschaft Agencement d'actionnement électromécanique d'un frein électromécanique et frein électromécanique
EP2574813A1 (fr) * 2011-09-30 2013-04-03 Siemens Aktiengesellschaft Agencement d'actionnement électromécanique d'un frein électromécanique et frein électromécanique
US20180154881A1 (en) * 2016-12-07 2018-06-07 Fte Automotive Gmbh Electric parking brake actuator for actuation of a parking brake in a motor vehicle
DE102016218118B4 (de) 2016-09-21 2018-10-31 Schaeffler Technologies AG & Co. KG Elektrischer Pumpenaktor zum Betätigen einer Parksperre
EP3126696B1 (fr) 2014-04-02 2018-11-14 Schaeffler Technologies AG & Co. KG Concept d'actionneur modulaire pour actionneur d'embrayage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018112213B4 (de) 2018-05-22 2020-02-27 Schaeffler Technologies AG & Co. KG Getriebeaktor mit Pumpe
DE102019201664B4 (de) 2019-02-08 2021-07-29 Magna Pt B.V. & Co. Kg System zum Betätigen einer Parksperre
DE102019202975A1 (de) 2019-03-05 2020-09-10 Hanon Systems Efp Deutschland Gmbh Elektrisch angetriebene Fluidmaschine
DE102019125519B4 (de) 2019-09-23 2024-05-08 Schaeffler Technologies AG & Co. KG Betätigungseinrichtung mit Kupplungsaktor und integrierter Kühlmittelpumpfunktion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2574815A1 (fr) * 2011-09-30 2013-04-03 Siemens Aktiengesellschaft Agencement d'actionnement électromécanique d'un frein électromécanique et frein électromécanique
EP2574813A1 (fr) * 2011-09-30 2013-04-03 Siemens Aktiengesellschaft Agencement d'actionnement électromécanique d'un frein électromécanique et frein électromécanique
EP3126696B1 (fr) 2014-04-02 2018-11-14 Schaeffler Technologies AG & Co. KG Concept d'actionneur modulaire pour actionneur d'embrayage
DE102016218118B4 (de) 2016-09-21 2018-10-31 Schaeffler Technologies AG & Co. KG Elektrischer Pumpenaktor zum Betätigen einer Parksperre
US20180154881A1 (en) * 2016-12-07 2018-06-07 Fte Automotive Gmbh Electric parking brake actuator for actuation of a parking brake in a motor vehicle

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