WO2021004578A1 - Dispositif de verrouillage de stationnement pour un essieu moteur électrique et essieu moteur électrique comprenant un dispositif de verrouillage de stationnement - Google Patents

Dispositif de verrouillage de stationnement pour un essieu moteur électrique et essieu moteur électrique comprenant un dispositif de verrouillage de stationnement Download PDF

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Publication number
WO2021004578A1
WO2021004578A1 PCT/DE2020/100561 DE2020100561W WO2021004578A1 WO 2021004578 A1 WO2021004578 A1 WO 2021004578A1 DE 2020100561 W DE2020100561 W DE 2020100561W WO 2021004578 A1 WO2021004578 A1 WO 2021004578A1
Authority
WO
WIPO (PCT)
Prior art keywords
parking lock
shaft
gear
lock device
section
Prior art date
Application number
PCT/DE2020/100561
Other languages
German (de)
English (en)
Inventor
Jochen Loeffelmann
Thomas HUEMMER
Peter WELKER
Florian Reinle
Sebastian Langhans
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 WO2021004578A1 publication Critical patent/WO2021004578A1/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
    • F16H63/3425—Parking lock mechanisms or brakes in the transmission characterised by pawls or wheels
    • F16H63/3433—Details of latch mechanisms, e.g. for keeping pawls out of engagement

Definitions

  • the invention relates to a parking lock device for an electric drive axle of a motor vehicle and an electric drive axle for a motor vehicle with egg ner parking lock device.
  • Parking lock devices are provided to intervene with a pawl in a toothing of a parking lock wheel of the motor vehicle transmission when actuated by a driver of the motor vehicle in order to block an output shaft of the transmission that is operatively connected to the parking lock wheel against rotation and thus prevent the motor vehicle from rolling away .
  • DE 20 2009 014 189 U1 reveals an electrical machine design for an electrical axle of a motor vehicle.
  • This comprises an electrical machine which is connected via a transmission to at least one drive shaft that can be connected to a driven wheel of the motor vehicle, and a machine housing.
  • the electrical machine has a stator fixed to the housing and a rotor which is connected to an input element of the transmission.
  • the rotor is rotatably mounted on the machine housing by means of a first and a second rotor bearing section, the first rotor bearing section being connected to a machine output shaft which is connected to the input member of the transmission.
  • the machine output shaft is guided through the second rotor bearing section without contact.
  • a parking lock arrangement by means of which the transmission output shaft or the drive shaft is locked against the transmission housing, is received in a transmission housing of only one of the two machine arrangements.
  • the parking lock arrangement has a parking lock wheel which is fixed to a plane carrier of the transmission.
  • the object of the present invention is to provide an improved parking lock device for an electric drive axle and an electric drive axle with such a parking lock device.
  • torque damping should take place when the parking brake is applied.
  • the invention also relates to an electric drive axle for a motor vehicle, to summarizing an electric machine which is connected to a transmission via a shaft, and a parking lock device with a parking lock gear and a pawl, the parking lock gear being arranged coaxially and non-rotatably on the shaft, with Furthermore, the pawl cooperates with a toothing of the parking lock gear to lock a rotation of the shaft in a locking pitch and release a rotation of the shaft in an unlocking position, and wherein the parking lock gear is formed from a tube section and an integral Zahnradab section.
  • the locking pawl is provided to engage in a tooth gap of the parking lock wheel in the locking pitch, a roller box preferably actuating the locking pawl between the locking pitch and the unlocking position.
  • the roller box is switchable via an actuator or axially displaceable in the longitudinal direction of a guide rod. For example, with an axial displacement of the roller box in the longitudinal direction of the guide rod against a spring force of a spring element, an unlocking position of the pawl is initiated.
  • the roller box slides along a ramp on a side of the pawl opposite to a pawl tooth that engages in a tooth gap on the parking lock gear, that the pawl tooth is removed from the tooth gap.
  • roller box when the roller box is axially displaced in the longitudinal direction of the guide rod and in the direction of the spring force of the spring element, a locking point ment of the pawl initiated.
  • the roller box slides along the ramp on the side of the pawl opposite the pawl tooth in such a way that the pawl tooth engages in the tooth gap.
  • the parking lock gear is arranged positively on the shaft for the rotationally fixed connection, the parking lock gear and the shaft rotating about the same axis of rotation and thus being arranged coaxially to one another.
  • the shaft is used to introduce a torque and a speed in the transmission of the electrical drive axis.
  • the electrical machine is therefore operatively connected to the transmission via the shaft.
  • the term “operatively connected” means that the shaft and the electrical machine or the shaft and the transmission can be directly connected to one another, or that there is between the shaft and the electrical machine or between the shaft and the transmission still further transmission elements, for example one or more shafts or gears, can be located.
  • the electrical machine has a non-rotatable stator and a rotatable rotor which is at least indirectly connected to the shaft.
  • a pot-shaped parking lock gear is to be understood as a parking lock element which is essentially flange-shaped or pot-shaped and comprises the hollow cylindrical tube section and the gearwheel section formed in one piece thereon, which in turn has a central bore. Due to the cup-shaped design of the parking lock gear, torque damping is achieved when the parking lock device is actuated and the associated engagement of the pawl in a tooth gap on the parking lock gear.
  • the geometry of the pot-shaped parking lock gear in the circumferential direction is softer and more flexible than the geometry of a conventional parking lock gear. In this way, a rotor shock in particular can be minimized, so that the electrical machine and the transmission are relieved when the parking lock is engaged. Furthermore, there is also an improved vibration damping when initiating the barrier division, which also leads to an acoustic optimization rule.
  • the pipe section has on an inner circumferential surface a plug-in toothing which is designed to be connected non-rotatably to a plug-in toothing on an outer peripheral surface of the shaft.
  • the spline therefore engages on the pipe section in the spline on the shaft to form a form-fitting and non-rotatable connection between the cup-shaped parking lock gear and the shaft.
  • the pipe section preferably has a bearing section on an outer circumferential surface which is designed to receive a first bearing element.
  • the first bearing element for the rotatable mounting of the shaft is arranged on the outer circumferential surface of the pipe section.
  • the bearing element is preferably designed as a roller bearing, in particular as a ball bearing.
  • the first bearing element is provided to absorb forces acting on the cup-shaped parking lock gear by actuating the parking lock device.
  • an outer diameter of the parking lock gear is smaller than an outer diameter of the first bearing element.
  • the outer diameter of an outer ring of the bearing element has a larger diameter than the root circle of the toothing on the gear section of the parking lock gear.
  • a second bearing element for the rotatable mounting of the shaft is preferably arranged at least indirectly on the shaft, the first bearing element being designed as a Losla ger.
  • the second bearing element comes to rest either directly on the shaft or indirectly, for example via a further shaft or sleeve connected to the shaft.
  • the formation of the first bearing element as a floating bearing simplifies the assembly of the entire parking lock device.
  • the gear section has several recesses.
  • a recess is to be understood as a cutout or indentation or depression as a result of material removal.
  • the recesses serve as a structural weakening of the parking lock gear and lead to the fact that the cup-shaped parking lock gear becomes softer and the torque damping is increased when the parking lock device is actuated
  • the recesses are preferably formed at the end face in the gear section, the recesses at least partially breaking axially through the gear section.
  • the recesses are not just depressions formed, but as openings over the entire axial length of the gear wheel section.
  • each of the recesses is preferably formed in the circumferential direction between two tooth gaps.
  • the recesses together with the central bore for the axial passage of the shaft form a star-shaped pattern.
  • the respective recess extends radially below a respective tooth of the parking lock gear towards the center of the parking lock gear, i.e. in the direction of the axis of rotation.
  • Figure 1 is a partially greatly simplified schematic sectional view for
  • FIG. 2 shows a schematic perspective illustration of a parking lock wheel of the parking lock device according to the invention according to FIG. 1, and FIG.
  • Figure 3 is a schematic sectional view of the parking lock gear according to the
  • an electric drive axle for a motor vehicle has an electric machine 4, a transmission 14 and a parking lock device 1.
  • the electrical cal machine 4 and the transmission 14 are shown in the present greatly simplified.
  • a shaft 16 designed as a hollow shaft is arranged between the electrical machine 4 and the gearbox 14 and connects the electrical machine 4 indirectly to the gearbox 14 via a further shaft 3 designed as a rotor shaft.
  • the shaft 3, designed as a rotor shaft, is non-rotatably connected to a rotor of the electrical machine 4.
  • the shaft 16 is preferably connected to a sun gear of the transmission 14 (not shown here).
  • the parking lock device 1 comprises a parking lock gear 2 and a locking pawl 5, the parking lock gear 2 being coaxially and non-rotatably arranged on the shaft 16 and rotating together with the shaft 16 about an axis of rotation 17.
  • the locking pawl 5 cooperates with a toothing 6 of the parking lock gear 2 to lock a rotation of the shaft 16 in a locking pitch and to release rotation of the shaft 16 in an unlocked position.
  • a rotation of the shaft 3 designed as a rotor shaft is therefore blocked at the same time in the blocking division.
  • a roller box 18 is provided for actuating the pawl between the locking division and the Entsperrstel development.
  • the parking lock gear 2 is pot-shaped from a pipe section 7 and a gear section 8 connected to it in one piece.
  • the pipe section 7 has on an inner circumferential surface a spline 9 which is non-rotatably connected to a spline 10 on an outer circumferential surface of the shaft 16.
  • the pipe section 7 has a bearing section 11 on an outer circumferential surface which receives a first bearing element 12.
  • the first bearing element 12 is arranged on the outer circumferential surface of the pipe section 7 for the rotatable mounting of the shaft 16.
  • An outer diameter of the parking lock gear 2, i.e. the gear section 8, is smaller than an outer diameter of the first bearing element 12.
  • a second bearing element 15 for the rotatable mounting of the shaft 16 is arranged on the shaft 16 indirectly via the shaft 3 designed as a Ro gate shaft.
  • the first bearing element 12 is designed as a floating bearing.
  • FIG. 2 shows the pot-shaped parking lock gear 2, which is formed from the pipe section 7 and the one-piece connected gear section 8, in perspective.
  • the gear section 8 has a plurality of recesses 13, which are formed on the end face in the gear section 8 and extend in the radial direction towards the center. Furthermore, each of the recesses 13 is formed in the circumferential direction between two tooth gaps. The number of recesses 13 therefore corresponds to the number of teeth of the toothing 6 on the parking lock gear 2, and in the present case is six.
  • the recesses 13 are at least partially formed as axial openings and break axially through the gear section 8.
  • FIG. 3 shows the pot-shaped parking lock gear 2, which is formed from the pipe section 7 and the gear section 8 connected in one piece to it, according to a sectional view. In Figure 3, the spline 9 on the inner circumferential surface of the pipe section 7 and the toothing 6 on the outer circumference of the gear section 8 are shown.

Abstract

L'invention concerne un dispositif de verrouillage de stationnement (1) pour un essieu moteur électrique d'un véhicule automobile, comprenant une roue de verrouillage de stationnement (2), qui est conçue pour être disposée de manière coaxiale ainsi que solidaire en rotation sur un arbre (3), lequel est connecté de manière solidaire en rotation à une machine électrique (4), et un cliquet (5), qui est conçu pour entrer en interaction avec une denture (6) de la roue de verrouillage de stationnement (2), pour verrouiller une rotation de l'arbre (3) dans une position de verrouillage, et pour libérer une rotation de l'arbre (3) dans une position de déverrouillage, la roue de verrouillage de stationnement (2) étant réalisée en forme de pot à partir d'une section de tuyau (7) et d'une section de roue dentée (8) connectée d'une pièce à celle-ci. L'invention concerne en outre un essieu moteur électrique pour un véhicule automobile comprenant un tel dispositif de verrouillage de stationnement (1).
PCT/DE2020/100561 2019-07-11 2020-06-29 Dispositif de verrouillage de stationnement pour un essieu moteur électrique et essieu moteur électrique comprenant un dispositif de verrouillage de stationnement WO2021004578A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019118828.8 2019-07-11
DE102019118828.8A DE102019118828B4 (de) 2019-07-11 2019-07-11 Parksperrenvorrichtung für eine elektrische Antriebsachse und elektrische Antriebsachse mit einer Parksperrenvorrichtung

Publications (1)

Publication Number Publication Date
WO2021004578A1 true WO2021004578A1 (fr) 2021-01-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2020/100561 WO2021004578A1 (fr) 2019-07-11 2020-06-29 Dispositif de verrouillage de stationnement pour un essieu moteur électrique et essieu moteur électrique comprenant un dispositif de verrouillage de stationnement

Country Status (2)

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DE (1) DE102019118828B4 (fr)
WO (1) WO2021004578A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022207485A1 (de) 2022-07-21 2024-02-01 Zf Friedrichshafen Ag Parksperrenrad

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090050435A1 (en) * 2006-03-28 2009-02-26 Haruhiko Yamada Parking Lock Device for Transmission
DE202009014189U1 (de) 2009-10-20 2011-03-03 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Elektrische Maschine für eine elektrische Achse eines Kraftfahrzeuges
DE102011004698A1 (de) * 2010-02-25 2012-12-27 Aisin Aw Co., Ltd. Fahrzeugleistungsübertragungsvorrichtung
DE102017124499A1 (de) * 2016-10-21 2018-04-26 GM Global Technology Operations LLC Parksteuerungssystem für ein fahrzeuggetriebe
DE102017212804A1 (de) * 2017-07-26 2019-01-31 Robert Bosch Gmbh Einrichtung zur Blockierung eines Getriebes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1212630A (en) * 1969-07-10 1970-11-18 Borg Warner Ltd Torque transmitting connection and method of making the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090050435A1 (en) * 2006-03-28 2009-02-26 Haruhiko Yamada Parking Lock Device for Transmission
DE202009014189U1 (de) 2009-10-20 2011-03-03 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Elektrische Maschine für eine elektrische Achse eines Kraftfahrzeuges
DE102011004698A1 (de) * 2010-02-25 2012-12-27 Aisin Aw Co., Ltd. Fahrzeugleistungsübertragungsvorrichtung
DE102017124499A1 (de) * 2016-10-21 2018-04-26 GM Global Technology Operations LLC Parksteuerungssystem für ein fahrzeuggetriebe
DE102017212804A1 (de) * 2017-07-26 2019-01-31 Robert Bosch Gmbh Einrichtung zur Blockierung eines Getriebes

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DE102019118828A1 (de) 2021-01-14
DE102019118828B4 (de) 2021-02-04

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