• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a parking lock for a transmission of a motor vehicle, comprising a mobile actuating device (24) having a locking position of a toothed wheel connected to the wheels of the vehicle, a spring of actuation (16) which tends to maintain this device in its blocking position, and a hydraulic cylinder (14) intended to actuate the device (24) to a release position of the toothed wheel, characterized in that it comprises a movable retaining finger (32) which can hold the actuating device (24) in its unlocking position, comprising a return spring (36) which tends to move the finger (32) towards a non-retaining position thereof actuating device (24).
    公开号:FR3063323A1
    申请号:FR1751548
    申请日:2017-02-27
    公开日:2018-08-31
    发明作者:Benoit Tremeau；Stephane Rautureau；Herve Mignon；Joel Cantin；Sandrine Jacques
    申请人:Peugeot Citroen Automobiles SA；
    IPC主号:
    专利说明:

    Holder (s): PEUGEOT CITROEN AUTOMOBILES SA Société anonyme.
    Extension request (s)
    Agent (s): PEUGEOT CITROEN AUTOMOBILES SA Public limited company.
    MECHANICALLY LOCKED PARKING LOCK FOR A MOTOR VEHICLE TRANSMISSION.
    FR 3 063 323 - A1
    The subject of the invention is a parking lock for a transmission of a motor vehicle, comprising a mobile actuating device (24) having a locking position of a toothed wheel linked to the wheels of the vehicle, a spring of actuation (16) which tends to maintain this device in its locking position, and a hydraulic cylinder (14) provided for actuating the device (24) towards a position for unlocking the toothed wheel, characterized in that it comprises a movable retaining finger (32) capable of retaining the actuating device (24) in its unlocked position, comprising a return spring (36) which tends to move the finger (32) to a position where this is not retained actuating device (24).

    MECHANICALLY LOCKED PARKING LOCK FOR A MOTOR VEHICLE TRANSMISSION
    The present invention relates to a parking lock for a transmission of a motor vehicle, as well as methods of controlling this parking lock, and a motor vehicle equipped with such a parking lock.
    Automatic transmissions of motor vehicles generally include a parking function comprising a lock controlled by a lever or a button actuated by the driver, giving a parking position, called "Park" in English, which blocks this transmission to keep the vehicle at the stop.
    A known type of lock, presented in particular in document EP-B11679456, comprises a rod actuating a parking lever, permanently returned to rest by an actuating spring in a locking position where it lets a finger descend into notches '' a wheel linked in rotation to the vehicle wheels. In this rest position the vehicle is kept stationary.
    A hydraulic cylinder pushes the rod in an unlocked position of the toothed wheel against the actuating spring, when it is supplied by a hydraulic pressure given by the rotation of the thermal engine of the vehicle, in order to lift the finger to release this toothed wheel.
    A hook is connected to a control spring giving a rest position where it leaves the rod free, as well as to an electromagnet acting when it is activated against the control spring, to maintain the rod in its unlocked position after the hydraulic cylinder has placed it in this position.
    One obtains in this way in the absence of energy, that is to say hydraulic pressure and electrical control of the electromagnet, a return of the rod in its locked position performing the parking function which ensures the security.
    For a movement of the rod deactivating the parking function, the driver must control a neutral position, a forward or a reverse position of the vehicle, which delivers a pressure in the piston which pushes the rod into the unlocked position, by deactivating this parking function. At the same time, the electromagnet is activated to maintain the unlocking position of the rod, and keep the parking function deactivated.
    The presence of the hook with its electromagnet keeps the transmission with the parking function deactivated during engine stops for vehicles equipped with an automatic engine stop and start function, called "stop and start" in English. .
    When the engine is stopped by the automatic start and stop function, there is no longer any oil pressure in the transmission generated by the rotation of this engine. It is then necessary to activate the electromagnet before stopping the heat engine.
    The parking function is reset automatically in the event of the solenoid control stopping and the hydraulic pressure in the cylinder being cut off, releasing the rod by returning it to its locked position, which gives a monostable state of this function. where by default it is activated.
    However, a problem arises in certain cases, in particular in motor vehicle assembly workshops which automatically advance these vehicles on an assembly line with a motorized traction system. It is then necessary to provide a manual control which deactivates the parking function to allow free movement of the towed vehicle.
    For this, a known type of parking lock, presented in particular by document GB-B-2531630, comprises a retaining finger actuated manually with a complex maneuver to ensure security, which retains the lock in its unlocking position after it has been put in this position.
    The release of the retaining finger allowing the normal use of the parking function, then requires a second manual action on this finger.
    As a variant, the retaining finger can be formed by a temporary tool positioned on a transmission control by an operator to obtain the unlocking position, then removed manually for normal use of the parking function.
    However, this type of retaining finger requires a final intervention to release the parking function, which requires attention from the operators. Forgetting to remove the finger poses problems because the parking function is not operational. Conversely, a premature withdrawal of this finger leads to a blockage of the vehicle, which can stop a production line in an assembly plant for these vehicles.
    The object of the present invention is in particular to avoid these problems of the prior art.
    To this end, it provides a parking lock for a transmission of a motor vehicle, comprising a mobile actuating device having a locking position of a toothed wheel linked to the wheels of the vehicle, an actuating spring which tends to keep this device in its blocking position, and a hydraulic cylinder provided for actuating the device towards a position for unlocking the toothed wheel, this lock being remarkable in that it comprises a movable retaining finger capable of retaining the device. actuation in its unlocked position, comprising a return spring which tends to move the finger towards a position of non-retention of this actuating device.
    An advantage of this parking lock is that after having put the actuating device in its unlocking position, and moving the retaining finger to retain this device in this position, the actuating spring applies a force through of the device on the retaining finger, which prevents the withdrawal of this finger by its return spring towards its position of non-retention. The retaining finger then permanently maintains the unlocking position, the parking function remains deactivated.
    Subsequently, during a first normal activation of the parking function with a pressure applied to its hydraulic piston, the actuating device moves a little more towards its unlocking position which releases the retaining finger, and leaves its spring move it to its position of no restraint.
    The actuator then operates normally without the retaining finger which no longer acts. The parking function has once again become fully operational without any specific intervention from an operator.
    The parking lock according to the invention may further include one or more of the following characteristics, which can be combined with one another.
    Advantageously, the retaining finger comprises a form of retention providing a hold on the actuating device.
    In this case, advantageously the form of maintenance comprises contours preventing the return of the retaining finger by its return spring when the hydraulic cylinder is not supplied.
    In particular, the holding form may include a hook formed at the end of the retaining finger, which fits into a corresponding shape of the actuating device.
    Advantageously, the retaining finger comprises a resetting means putting it in its position for retaining the actuating device.
    In particular, the resetting means may comprise a jack or an electromagnet.
    Alternatively, the reset means may include a manual control provided to be accessible from outside the transmission.
    The invention also relates to a method for controlling a parking lock comprising any one of the preceding characteristics, comprising a step of positioning the retaining finger keeping the actuating device in its unlocked position, before the installation of the transmission in the vehicle.
    The invention further relates to a method of controlling a parking lock comprising any one of the preceding characteristics, equipped with a reset means, comprising a step of resetting the retaining finger during an intervention of maintenance on the vehicle.
    The invention further relates to a motor vehicle comprising a transmission fitted with a parking lock comprising any one of the preceding characteristics.
    The invention will be better understood and other characteristics and advantages will appear more clearly on reading the description below given by way of example and without limitation, with reference to the accompanying drawings in which:
    - Figure 1 shows a parking lock according to the prior art;
    - Figures 2a to 2e are diagrams showing different stages of operation of this lock;
    - Figure 3 shows a parking lock according to the invention, comprising a restraint system;
    - Figures 4a to 4e are diagrams showing different stages of operation of this lock; and
    - Figures 5a and 5b are diagrams showing different stages of operation of a lock according to a variant, comprising a retaining system which can be reset.
    Figure 1 shows a parking lock acting on a toothed wheel 2 linked to a pinion of a transmission connected to the vehicle wheels, comprising a lever 4 fixed on a pivot 6, having a boss which engages during pivoting of the lever in one of the notches of the toothed wheel.
    An actuating rod 8 supports a pierced socket 10 engaged on this rod. An actuating spring 16 pushes the actuating rod 8 along its axis towards a front side, which presses on the sleeve 10 having on its front face a cone pressing on the lever 4.
    When the toothed wheel 2 rotates at low speed, the pressure maintained on the lever 4 causes its boss to engage in a notch of this wheel when it comes opposite, under the effect of the relaxation of the actuating spring 16. The parking function is blocked.
    A hydraulic cylinder 14 allows the actuating rod 8 to move backwards to unlock the parking function. A monostable electromagnetic actuator 18 then realizes, when it is activated, keeping the actuating rod 8 in its unlocked position for this function. When the actuator 18 is deactivated and the actuator 14 is not supplied, it automatically releases the actuating rod 8.
    An electronic computer 12 controlling the entire transmission, in particular the parking function, is fixed to a housing crossed by the actuating rod 8, supporting the hydraulic cylinder 14 and the actuator 18.
    Figure 2a shows the parking lock in its locked position with the engine of the vehicle stopped, or the parking position requested by the driver.
    The hydraulic cylinder 14 is not supplied and the electromagnetic actuator 18 is not activated, the actuating spring 16 freely pulls the axis 24 of this cylinder, which actuates the lever 4 by blocking the transmission.
    Figure 2b shows a request to unlock the parking function by the driver, who commands a neutral position, forward or reverse market of the transmission. A fluid pressure P feeds the hydraulic cylinder 14, the axis 24 advances out of the cylinder 14 which causes the lever 4 to tilt.
    Figure 2c shows the release position, the axis 24 is fully extended, and the lever 4 has released the transmission which can rotate freely.
    FIG. 2d shows the electromagnetic actuator 18 which is activated to move its stop 20 bearing on a stop 22 linked to the axis 24.
    The fluid pressure P can be removed, the actuating spring 16 cannot move back the axis 24 held by the stop 20 of the electromagnetic actuator 18. The parking lock remains in its locked position.
    Figure 2e shows a release of the control of the electromagnetic actuator 18. The actuating spring 16 moves the axis 24 back into the hydraulic cylinder 14, by emptying it which returns the lock to its locked position.
    As a variant, the actuator 18 can use another source of energy by operating in a similar manner, such as hydraulic pressure.
    FIG. 3 shows a retaining cylinder 30 comprising a piston 34 connected to a retaining finger 32, and a return spring 36 which tends to move this piston back. In a front retaining position, the retaining finger 32 is engaged in a slot 40 of the axis 24 of the hydraulic cylinder 14, which prevents the recoil of this axis under the effect of its actuating spring 16.
    The end of the retaining finger 32 comprises a holding hook 38 turned on the side opposite to the hydraulic cylinder 14, the slot 40 of the axis 24 has a bent shape similar to this hook. In its retaining position the hook of the retaining finger 38 is engaged in the bent shape of the slot 40. The actuating spring 16 tending to move the axis 24, keeps the hook 3d in this bent shape by preventing its withdrawal under the effect of return spring 36.
    By advancing a small distance the axis 24 of the hydraulic cylinder 14 under the effect of a fluid pressure P in this cylinder, the hook of the retaining finger 38 is automatically released from the bent shape of the slot 40. The finger retaining 32 then moves back freely under the effect of its return spring 36 by sliding in the slot 40 which is wide enough to let the hook 38 pass, then completely disengages from this slot.
    The axis 24 of the hydraulic cylinder 14 is then released. By then withdrawing the fluid pressure P, the axis 24 of the hydraulic cylinder 14 moves back freely under the effect of the actuating spring 16 by putting the parking lock in its locked position.
    Generally, the retaining finger 32 can act on any element forming a mobile actuating device, disposed between the hydraulic cylinder 14 and the locking means of the toothed wheel 2, which can have a rectilinear movement or a movement swivel. In particular, the mobile actuation device can be the actuation rod 8 shown in FIG. 1, passing through the housing supporting the hydraulic cylinder 14 and the actuator 18.
    FIG. 4a shows the parking lock comprising a retention of its unlocking position, for example after a manual intervention which has positioned the retaining finger 32 in the slot 40 of the axis 24. Advantageously the manufacturer of the transmission applies this position before delivering the transmissions to the automaker. The vehicle can move freely by pulling it on an assembly line from the manufacturer, without being hindered by the parking system.
    Figure 4b shows a first actuation of the parking lock, a fluid pressure P being applied in the hydraulic cylinder 14 to exit the axis 24 in a short stroke. This operation is carried out for example during the first start of the vehicle, which then no longer needs to be pulled on the manufacturer's assembly line.
    Figure 4c shows the automatic return of the retaining finger 32 by its return spring 34, the hook 38 of this finger being released from the slot 40. Then there is normal operation of the transmission.
    FIG. 4d shows the activation of the actuator 18, which allows withdrawal of the fluid pressure P while maintaining the release of the lock.
    Figure 4e shows a release of the actuator 18, which causes the axis 24 to recede and the lock to lock.
    FIGS. 5a and 5b show a retaining system which can be reset by an operator command, the retaining cylinder 30 receiving a pressure of fluid which moves its piston 34 by compressing the return spring 36.
    As a variant, it is possible to use any other rearming system compressing the return spring 36 on a transmission installed in the vehicle, such as a manual control from the outside of this transmission, or an electrical system, which is implemented for example for maintenance operations on the vehicle.
    FIG. 5a shows from the position shown in FIG. 4d, the lock being in its unlocking position maintained by the stop 20 of the actuator 18, the application of a fluid pressure R in the retaining cylinder 30. The retaining finger 32 advances under the effect of its piston 34 to engage in the slot 40 of the axis 24, which blocks this axis and maintains the unlocked position.
    As a variant, it is possible to apply a pressure R on the piston 34, with the pressure P in the hydraulic cylinder 14. It is also possible to apply this pressure R with the latch in its blocking position, then move this latch with a pressure of fluid P in the hydraulic cylinder 14, which automatically engages the retaining finger 32 in the slot 40 when it arrives opposite this finger.
    FIG. 5b shows the withdrawal of the fluid pressure P in the hydraulic cylinder 14, which allows a small descent of the axis 24, and engages the hook of the retaining finger 38 at the bottom of the complementary shape of the slot 40. The vehicle engine can be stopped, the retaining finger 32 can no longer move back maintains in all cases the unlocking position of the parking lock.
    During a next actuation of the parking lock, the retaining cylinder 30 is no longer supplied, there will automatically be a withdrawal of the retaining finger 32 under the effect of its return spring 30, and normal operation of the transmission .
    We realize with a simple complement in the transmission, a means of holding the parking lock in its unlocked position which does not modify the rest of the vehicle.
    权利要求:
    Claims (11)
    [1" id="c-fr-0001]
    1 - Parking lock for a transmission of a motor vehicle, comprising a mobile actuation device (24) having a position
    5 for locking a toothed wheel (2) linked to the vehicle wheels, an actuating spring (16) which tends to keep this device in its locking position, and a hydraulic cylinder (14) provided for actuating the device ( 24) to an unlocking position of the toothed wheel (2), characterized in that it comprises a movable retaining finger (32) capable of retaining the device
    10 actuator (24) in its unlocked position, comprising a return spring (36) which tends to move the finger (32) to a position of non-retention of this actuator (24).
    [2" id="c-fr-0002]
    2 - Parking lock according to claim 1, characterized in that the retaining finger (32) comprises a form of holding providing a holding
    15 on the actuating device (24).
    [3" id="c-fr-0003]
    3 - Parking lock according to claim 2, characterized in that the holding form has contours preventing the return of the retaining finger (32) by its return spring (36) when the hydraulic cylinder (14) is not powered.
    20
    [4" id="c-fr-0004]
    4 - Parking lock according to claim 3, characterized in that the holding form comprises a hook (38) formed at the end of the retaining finger (32), which adjusts in a corresponding shape (40) of the device actuation (24).
    [5" id="c-fr-0005]
    5 - Parking lock according to any one of claims
    25 above, characterized in that the retaining finger (32) comprises a resetting means putting it in its retaining position of the actuating device (24).
    [6" id="c-fr-0006]
    6 - Parking lock according to claim 5, characterized in that the resetting means comprises a jack (30) or an electromagnet.
    [7" id="c-fr-0007]
    7 - Parking lock according to claim 5, characterized in that the resetting means comprises a manual control intended to be accessible from the outside of the transmission.
    [8" id="c-fr-0008]
    8 - Method for controlling a parking lock according to any one of the preceding claims, characterized in that it comprises a step of positioning the retaining finger (32) holding the actuating device (24) in its release position, before installing the transmission in the vehicle.
    [9" id="c-fr-0009]
    9 - Method for controlling a parking lock according to any one of claims 5 to 7, characterized in that it comprises a step of resetting the retaining finger (32) during a maintenance intervention on the vehicle.
    [10" id="c-fr-0010]
    10 - Motor vehicle comprising a transmission equipped with a parking lock, characterized in that this lock is according to one
    [11" id="c-fr-0011]
    15 any of claims 1 to 7.
    1/2 v- 14 —p
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3063323A1|2018-08-31|PARKING LOCK WITH MECHANICAL LOCK FOR A MOTOR VEHICLE TRANSMISSION
    FR2834323A1|2003-07-04|METHOD AND DEVICE FOR ACTUATING A PARKING LOCK OF AN AUTOMATED GEARBOX
    FR2754582A1|1998-04-17|DEVICE FOR LOCKING A DEVICE FOR SELECTING AN AUTOMATIC SWITCHED GEARBOX
    EP1614600A1|2006-01-11|Hydraulic actuation device of a parking brake and method of controlling such a device
    FR2525978A1|1983-11-04|DEVICE FOR CONTROLLING ROAD BRAKES AND PARKING BRAKES
    FR2998238A1|2014-05-23|Parking lock system for transmission utilized for car, has actuation device with carriage, and stop that releases carriage such that carriage slides in parking lock position, and latch is actuated in parking lock position
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    FR2559723A1|1985-08-23|HYDRAULIC BRAKING SYSTEM WITH SLIDING CONTROL
    FR2907530A1|2008-04-25|PARKING LOCK DEVICE FOR MOTOR VEHICLES AND METHOD FOR ENABLING AND DISABLING A PARKING LOCK DEVICE
    WO2009101331A1|2009-08-20|Method of operating a motor vehicle hill start assistance system
    FR2777963A1|1999-10-29|SELECTION DEVICE FOR AUTOMATIC TRANSMISSION OF A MOTOR VEHICLE
    FR3063324A1|2018-08-31|HYDRAULIC LOCKING PARKING LOCK FOR A MOTOR VEHICLE TRANSMISSION
    FR2678869A1|1993-01-15|UTILITY VEHICLE WITH FOUR WHEELS.
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    FR2967226A1|2012-05-11|Parking lock system for transmission of motor vehicle, has locking lever comprising drive connector that is activated or deactivated by electromagnetic actuator by movement of gear and stop unit that is fitted in recess of parking wheel
    WO2015092177A1|2015-06-25|Method and device for controlling the recharging of a hydraulic accumulator of a controlled gearbox, as a function of pressure
    EP3000662B1|2019-08-21|System for covering a luggage compartment of a motor vehicle
    FR3067781A1|2018-12-21|LATCHING SYSTEM OF A MOTOR VEHICLE TRANSMISSION COMPRISING A LOCKING LEVER
    FR3054187A1|2018-01-26|ARTICULATED BRAKE PEDAL FOR A VEHICLE COMPRISING AUTOMATIC BRAKING
    EP1930220A1|2008-06-11|Parking brake control
    同族专利:
    公开号 | 公开日
    FR3063323B1|2020-10-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2002010619A1|2000-08-02|2002-02-07|Zf Friedrichshafen Ag|Parking brake, especially for an automotive gearbox|
    JP2008128444A|2006-11-24|2008-06-05|Aisin Aw Co Ltd|Parking device for automatic transmission|
    EP2469129A1|2010-12-22|2012-06-27|Audi AG|Method for actuating a parking brake|WO2021190703A1|2020-03-23|2021-09-30|Schaeffler Technologies AG & Co. KG|Parking lock in a normally locked configuration for a drive train|
    WO2022002298A1|2020-06-29|2022-01-06|Schaeffler Technologies AG & Co. KG|Parking lock actuation system with an interlockingly retained locking element, and method for controlling the parking lock actuation sytsem|
    WO2022002296A1|2020-06-29|2022-01-06|Schaeffler Technologies AG & Co. KG|Parking lock actuation system with an interlockingly retained locking element, and method for controlling the parking lock actuation sytsem|
    WO2022028645A1|2020-08-05|2022-02-10|Schaeffler Technologies AG & Co. KG|Parking lock operating system and method of operating a parking lock operating system|
    WO2022028647A1|2020-08-05|2022-02-10|Schaeffler Technologies AG & Co. KG|Parking lock operating system|
    法律状态:
    2018-01-22| PLFP| Fee payment|Year of fee payment: 2 |
    2018-08-31| PLSC| Publication of the preliminary search report|Effective date: 20180831 |
    2020-01-22| PLFP| Fee payment|Year of fee payment: 4 |
    2021-01-20| PLFP| Fee payment|Year of fee payment: 5 |
    2022-01-19| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1751548|2017-02-27|
    FR1751548A|FR3063323B1|2017-02-27|2017-02-27|MECHANICAL LOCKING PARKING LOCK FOR A MOTOR VEHICLE TRANSMISSION|FR1751548A| FR3063323B1|2017-02-27|2017-02-27|MECHANICAL LOCKING PARKING LOCK FOR A MOTOR VEHICLE TRANSMISSION|
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