WO2020108700A1 - Système de frein de stationnement pour une transmission comportant un engrenage de verrouillage de stationnement - Google Patents

Système de frein de stationnement pour une transmission comportant un engrenage de verrouillage de stationnement Download PDF

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Publication number
WO2020108700A1
WO2020108700A1 PCT/DE2019/101009 DE2019101009W WO2020108700A1 WO 2020108700 A1 WO2020108700 A1 WO 2020108700A1 DE 2019101009 W DE2019101009 W DE 2019101009W WO 2020108700 A1 WO2020108700 A1 WO 2020108700A1
Authority
WO
WIPO (PCT)
Prior art keywords
parking lock
piston
activation
axially
spring
Prior art date
Application number
PCT/DE2019/101009
Other languages
German (de)
English (en)
Inventor
Tobias KIRCHGÄSSNER
Matthias Feuerbach
Klaus Kraemer
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
Priority to CN201980060052.9A priority Critical patent/CN112714841B/zh
Publication of WO2020108700A1 publication Critical patent/WO2020108700A1/fr

Links

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
    • 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
    • F16H63/3483—Parking lock mechanisms or brakes in the transmission with hydraulic actuating means
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H2061/2869—Cam or crank gearing

Definitions

  • the invention relates to a parking lock device for a transmission of a motor vehicle, which has a parking lock wheel.
  • Parking lock devices are provided, when actuated by a driver of the motor vehicle with a pawl, to engage a toothing of a parking lock wheel of the motor vehicle transmission in order to block an output shaft of the transmission, which is operatively connected to the parking lock wheel, against rotation and thus prevent the motor vehicle from rolling away by this engagement of the pawl .
  • Parking lock devices are known, inter alia, from DE 10 2014 106 527 A1, DE 10 2014 208 374 A1 and CN 106 931 161 A.
  • a generally known parking lock device comprises a pawl which can be actuated via an activation cam and pivotable about a first axis of rotation, the activation cam being actuatable via a cylinder assembly and pivotable about a second axis of rotation.
  • the cylinder assembly comprises a piston which is axially guided and axially actuatable in a cylinder and a shaft which is axially connected to the piston and is axially movably guided in a housing.
  • the piston is operatively connected to the activation cam via a swivel arm on which a torsion spring acts.
  • the activation mechanism is relatively complex and requires appropriate installation space.
  • the object of the present invention is to provide a compact parking lock device.
  • the object is achieved by the subject matter of patent claim 1. Preferred embodiments can be found in the dependent claims.
  • the pawl is intended to engage in the locking division in a tooth space of the parking lock wheel, the cylinder assembly actuating the locking pawl via the activation cam between the locking division and the unlocking position.
  • the design of the piston as a hollow piston and the arrangement of the spring element and the activation plunger within the piston create a compact and easy-to-assemble unit which enables optimization of the parking lock device.
  • a cylinder pin is preferably arranged on an end face of the shaft, the spring element coming into contact with the end face of the shaft and being arranged at least partially around the cylinder pin.
  • the cylinder bolt forms a stop surface for the activation plunger.
  • the cylinder bolt is provided as an assembly aid and for guiding the spring element.
  • the shaft preferably has an axial bore for receiving the cylinder bolt.
  • the axial bore is designed in particular as a central bore in an end face of the shaft.
  • the cylinder pin is preferably non-positively received in the axial bore, in particular pressed with the axial bore.
  • the activation plunger is preferably pivotally mounted on a lever arm of the activation cam via a bolt.
  • a bolt extends transversely through a bore provided for this purpose on the activation plunger and on the lever arm of the activation cam, in order thereby to enable a pivoting movement and a transmission of force between the activation plunger and the activation cam.
  • a translational movement of the activation cam is converted into a rotary movement of the activation cam.
  • the activation plunger advantageously has a radial widening, wherein a first and a second pin element are at least partially guided radially through the piston and are designed to form a stop for the widening on the activation plunger.
  • the radial widening is bead-shaped and circumferential on the activation plunger and, on the one hand, enables the activation plunger to tilt slightly in the piston and, on the other hand, the formation of a circumferential counter surface for the stop surfaces of the two pin elements.
  • the two pin elements allow simple and safe mounting of the activation plunger and spring element in the piston and limits the maximum extension of the activation plunger from the piston, the activation plunger being biased against the two pin elements by the spring element.
  • a piston spring is preferably arranged axially between the housing and the piston.
  • the piston spring biases the piston axially and is supported axially on the housing and axially on the piston.
  • a spring constant of the piston spring is preferably greater than a spring constant of the spring element.
  • the spring element is softer than the piston spring.
  • the invention includes the technical teaching that the spring element is designed as a Druckfe.
  • the piston spring is also designed as a compression spring.
  • the spring element and the piston spring therefore act in the same direction, namely in the longitudinal direction of the piston.
  • a working space for receiving a fluid, which is set up to actuate the piston is preferably formed spatially between the cylinder and the piston.
  • the fluid is designed as an incompressible pressure medium, in particular as a hydraulic liquid.
  • the piston can be actuated by discharging or by introducing the fluid into the working area.
  • an actuator with a check valve is arranged on the cylinder and is set up to let the fluid in and out into the working space.
  • a tension spring is preferably arranged on the locking pawl, the tensioning spring being designed to return the locking pawl to the unlocking position. The tension spring preferably engages in a recess provided for this purpose on the pawl. When the activation cam rotates into an unlocked position, the tensioning spring acts on the pawl in such a way that the pawl is pulled out of the tooth space on the parking lock wheel, thereby releasing the rotation of the parking lock wheel.
  • a parking lock device in conjunction with a parking lock gear of a transmission of a motor vehicle will suggest.
  • the parking lock device is preferably integrated in the transmission.
  • FIG. 1 shows a schematic sectional illustration to illustrate a parking lock device according to the invention
  • FIG. 2 shows a schematic perspective sectional view of the parking lock device according to FIG. 1.
  • Figures 1 and 2 show a parking lock device 1 according to the invention for a - not shown here - gearbox of a motor vehicle.
  • a parking lock wheel 2 of the transmission is only shown in FIG.
  • Figure 1 also shows a pawl 3, which is hidden in Figure 2 and is therefore not shown.
  • FIG. 2 due to the perspective representation, not all reference numerals from FIG. 1 are also shown in FIG. 2.
  • the pawl 3 of the parking lock device 1 is shown in an unlock position.
  • the pawl 3 does not engage in a tooth gap of a toothing on the parking lock gear 2, so that the parking lock gear 2 is unlocked and thus freely rotatable.
  • the activation cam 5 can be actuated via a cylinder assembly 6 and pivotable about a second axis of rotation 4b.
  • the activation cam 5 and pawl 3 rotate counterclockwise about the respective axis of rotation 4b, 4a.
  • the cylinder assembly 6 comprises a cylinder 7 and a piston 8 which is axially guided and axially actuable in the cylinder 7 and which is designed as a hollow piston and has a sealing element 22 on its circumferential surface towards the cylinder 7.
  • the cylinder 7 is hidden in FIG. 2 to enable the view of the piston 8.
  • the cylinder assembly 6 comprises a shaft 11 which partially projects into the piston 8 and is axially and non-rotatably connected to the piston 8.
  • the shaft 11 is axially movably guided in a stationary housing 12.
  • a Kol benfeder 19 is arranged axially between the housing 12 and the piston 8 and biases the piston 8 in the axial direction.
  • a working space 20 for receiving a pressure medium which is designed for axia len actuation of the piston 8, is formed.
  • the working space 20 is acted upon by an incompressible pressure medium, the pressure medium counteracting a spring force of the piston spring 19.
  • the piston 8 has an activation plunger 9 guided therein.
  • the activation plunger 9 is axially prestressed via a spring element 10 and is operatively connected to the activation cam 5.
  • the spring element 10 comes to rest on the one hand on the end face of the shaft 11 and on the other hand on the activation plunger 9.
  • a cylinder pin 13 is also arranged on this end face of the shaft 11, an axial bore 14 being formed on the end face of the shaft 11 and being designed to receive the cylinder pin 13.
  • the spring element 10 is partially arranged around the cylinder pin 13 Zy.
  • the spring element 10 and the piston spring 19 are designed as compression springs.
  • a spring constant of the piston spring 19 is greater than a spring constant of the spring element 10.
  • the piston spring 19 is shown in a maximally compressed state, the piston 8 coming into contact with an end-side cylinder section 21 of the housing 12. Furthermore, the spring element 10 is in a prestressed and maximally stretched state.
  • the activation plunger 9 is maximally out of the piston 8 and axially comes to rest against a stop.
  • a first and a second pin element 18a, 18b are guided radially through bores on the piston 8 provided for this purpose and are set up to form the stop for the activation plunger 9.
  • the activation plunger 9 is mushroom-shaped and has a radial widening tion 17 at an end section directed towards the spring element 10, the radial dial widening 17 in the present case coming into contact with the two pin elements 18a, 18b and allowing the activation plunger 9 in the piston 8 to tilt slightly .
  • the activation plunger 9 is pivotally received on a swaying arm 16 of the activation cam 5 via a pin 15.
  • the piston 8 is displaced axially via the piston spring 19 in the direction of the activation plunger 9, the piston spring 19 being stretched and the spring element 10 being compressed.
  • the activation plunger 9 penetrates further into the piston 8 and comes to rest on an end face of the cylinder bolt 13, the activation cam 5 not being pivoted.
  • a relative position between the piston 8 and the activation plunger 9 is changed, the relative position between the activation plunger 9 and the activation cam 5 being retained.
  • an over the activating cams 5 acting on the pawl 3 actuating force due to the larger ren spring constant of the piston spring 19 compared to the spring constant of the spring element 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un système de frein de stationnement (1) pour une transmission d'un véhicule à moteur comportant un engrenage de verrouillage de stationnement (2), ledit système de frein de stationnement comprenant un cliquet de verrouillage (3) conçu de manière à coopérer avec une denture de l'engrenage de verrouillage de stationnement (2), afin de bloquer une rotation de l'engrenage de verrouillage de stationnement (2) dans une position de verrouillage et à libérer une rotation de l'engrenage de verrouillage de stationnement (2) dans une position de déverrouillage, le cliquet de verrouillage (3) pouvant être actionné par l'intermédiaire d'une came d'activation (5) et pouvant pivoter autour d'un premier axe de rotation (4a), la came de rotation (5) pouvant être actionnée par l'intermédiaire d'un module cylindre (6) et pouvant pivoter autour d'un second axe de rotation (4b), le module cylindre (6) présentant un piston (8) guidé axialement dans un cylindre (7) et actionnable axialement, le module cylindre (6) présentant un arbre (11) qui est relié axialement au piston (8) et est guidé de manière déplaçable axialement dans un carter (12), le piston (8) se présentant sous forme de piston creux et présentant un poussoir d'activation (9) guidé dedans, le poussoir d'activation (9) étant précontraint axialement par l'intermédiaire d'un élément élastique (10) et coopérant avec la came d'activation (5).
PCT/DE2019/101009 2018-11-30 2019-11-25 Système de frein de stationnement pour une transmission comportant un engrenage de verrouillage de stationnement WO2020108700A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980060052.9A CN112714841B (zh) 2018-11-30 2019-11-25 一种带有驻车锁止轮的变速箱用驻车锁止装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018130485.4 2018-11-30
DE102018130485.4A DE102018130485B4 (de) 2018-11-30 2018-11-30 Parksperrenvorrichtung für ein Getriebe mit einem Parksperrenrad

Publications (1)

Publication Number Publication Date
WO2020108700A1 true WO2020108700A1 (fr) 2020-06-04

Family

ID=68965587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2019/101009 WO2020108700A1 (fr) 2018-11-30 2019-11-25 Système de frein de stationnement pour une transmission comportant un engrenage de verrouillage de stationnement

Country Status (3)

Country Link
CN (1) CN112714841B (fr)
DE (1) DE102018130485B4 (fr)
WO (1) WO2020108700A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112555406A (zh) * 2020-12-08 2021-03-26 磐吉奥(湖南)工业有限公司 一种驻车制动机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090158877A1 (en) * 2007-12-21 2009-06-25 Gm Global Technology Operations, Inc. Park inhibition solenoid assembly
KR100994104B1 (ko) * 2010-08-02 2010-11-12 주식회사 유니크 자동변속기용 파킹 로크 장치
DE102014106527A1 (de) 2013-05-24 2014-11-27 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Getriebeparksperrklinken-Betätigungsanordnung
DE102014208374A1 (de) 2014-05-05 2015-11-05 Zf Friedrichshafen Ag Parksperrenaktuator für eine hydraulisch betätigbare Parksperre eines Automatgetriebes
CN106931161A (zh) 2015-12-30 2017-07-07 长城汽车股份有限公司 一种液压驻车机构和自动变速器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205101546U (zh) * 2015-11-04 2016-03-23 科力远混合动力技术有限公司 一种机电耦合变速箱驻车机构
CN207297854U (zh) * 2017-08-14 2018-05-01 株洲欧格瑞传动股份有限公司 一种驻车装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090158877A1 (en) * 2007-12-21 2009-06-25 Gm Global Technology Operations, Inc. Park inhibition solenoid assembly
KR100994104B1 (ko) * 2010-08-02 2010-11-12 주식회사 유니크 자동변속기용 파킹 로크 장치
DE102014106527A1 (de) 2013-05-24 2014-11-27 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Getriebeparksperrklinken-Betätigungsanordnung
US20140346004A1 (en) * 2013-05-24 2014-11-27 GM Global Technology Operations LLC Transmission parking pawl actuation assembly
DE102014208374A1 (de) 2014-05-05 2015-11-05 Zf Friedrichshafen Ag Parksperrenaktuator für eine hydraulisch betätigbare Parksperre eines Automatgetriebes
CN106931161A (zh) 2015-12-30 2017-07-07 长城汽车股份有限公司 一种液压驻车机构和自动变速器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112555406A (zh) * 2020-12-08 2021-03-26 磐吉奥(湖南)工业有限公司 一种驻车制动机构
CN112555406B (zh) * 2020-12-08 2022-04-08 磐吉奥(湖南)工业有限公司 一种驻车制动机构

Also Published As

Publication number Publication date
DE102018130485B4 (de) 2020-06-18
CN112714841B (zh) 2022-08-09
CN112714841A (zh) 2021-04-27
DE102018130485A1 (de) 2020-06-04

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