US20160061324A1 - Park lock mechanism - Google Patents
Park lock mechanism Download PDFInfo
- Publication number
- US20160061324A1 US20160061324A1 US14/475,660 US201414475660A US2016061324A1 US 20160061324 A1 US20160061324 A1 US 20160061324A1 US 201414475660 A US201414475660 A US 201414475660A US 2016061324 A1 US2016061324 A1 US 2016061324A1
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- United States
- Prior art keywords
- output member
- cam
- pawl
- movement
- actuator
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/005—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles by locking of wheel or transmission rotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
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- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/006—Positive locking brakes
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- 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
-
- 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
- F16H63/3458—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire
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- 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
- F16H63/3458—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire
- F16H63/3466—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire using electric motors
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- 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
- F16H63/3458—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire
- F16H63/3475—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire using solenoids
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- 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
- F16H63/3491—Emergency release or engagement of parking locks or brakes
Definitions
- the present disclosure relates to a park lock mechanism.
- Park lock mechanisms are commonly integrated into transmissions and vehicle driveline components and help to immobilize a vehicle when the vehicle is parked and not in use.
- Known park lock mechanism typically include a dog ring, which is coupled to a rotatable component of the driveline component for common rotation, and a pawl that is selectively engagable with the dog ring. While the known park lock mechanisms are suitable for their intended purpose, they nevertheless remain susceptible to improvement.
- the present teachings provide a park lock mechanism for a vehicle driveline component that has a rotatable member.
- the park lock mechanism includes a housing, a dog ring, a pawl, a pawl spring and an actuator assembly.
- the dog ring is configured to be coupled to the rotatable member for common rotation.
- the dog ring is received in the housing and has a plurality of circumferentially spaced apart teeth.
- the pawl has a pawl tooth and is pivotably coupled to the housing for movement about a pivot axis between a first pivot position, in which the pawl tooth is disengaged from the teeth of the dog ring so as to not impede rotation of the dog ring relative to the housing, and a second pivot position in which the pawl tooth engages the teeth of the dog ring so as to impede rotation of the dog ring relative to the housing.
- the pawl spring biases the pawl toward the second pivot position.
- the actuator assembly has a cam follower, a cam, a first actuator device, a second actuator device, and a cam coupling. The cam follower is coupled to the pawl for movement therewith about the pivot axis.
- the cam is movable along a movement axis that is parallel to the pivot axis.
- the cam contacts the follower and includes a first cam portion and a second cam portion. Positioning of the first cam portion on the cam follower positions the pawl in the first pivot position, and positioning of the second cam portion on the cam follower positions the pawl in the second pivot position.
- the first actuator device includes a first linear motor with a first output member that is movable along the movement axis between a first output member position and a second output member position. The first output member is coaxial with the cam.
- the second actuator device includes a second linear motor with a second output member. The second output member is movable along the movement axis between a third output member position and a fourth output member position.
- the second output member is coaxial with the first output member.
- the cam coupling includes a first biasing spring and a locking mechanism.
- the first biasing spring is configured to bias the cam in a first direction along the movement axis relative to the first output member.
- the locking mechanism is configured to selectively lock the cam to the first output member for axial movement therewith.
- the locking mechanism is configured to unlock the cam from the first output member in response to movement of the second output member from the third output member position to the fourth output member position when the first output member is in the first output member position.
- the locking mechanism is configured to lock the cam to the first output member in response to movement of the second output member from the fourth output member position to the third output member position when the first output member is in the first output member position.
- the present teachings provide a park lock mechanism for a vehicle driveline component that has a rotatable member.
- the park lock mechanism includes a housing, a dog ring, a pawl, a pawl spring and an actuator assembly.
- the dog ring is configured to be coupled to the rotatable member for common rotation.
- the dog ring is received in the housing and has a plurality of circumferentially spaced apart teeth.
- the pawl has a pawl tooth and is pivotably coupled to the housing for movement about a pivot axis between a first pivot position, in which the pawl tooth is disengaged from the teeth of the dog ring so as to not impede rotation of the dog ring relative to the housing, and a second pivot position in which the pawl tooth engages the teeth of the dog ring so as to impede rotation of the dog ring relative to the housing.
- the pawl spring biases the pawl toward the second pivot position.
- the actuator assembly has a first linear actuator, a locking mechanism, a first biasing spring and a second linear actuator.
- the first linear actuator has a first output member that is movable along a movement axis that is parallel to the pivot axis.
- the locking mechanism is configured to selectively couple the first output member and the cam for common movement along the movement axis.
- the first biasing spring is configured to move the cam along the movement axis relative to the first output member when the locking mechanism decouples the cam from the first output member.
- the second linear actuator is configured to operate the locking mechanism to decouple the cam from the first output member to permit the first biasing spring to move the cam along the movement axis.
- the present teachings provide a method for operating a park lock mechanism having a dog ring, a pawl, a cam follower and a cam.
- the dog ring is rotatable about a drive axis and has a plurality of circumferentially spaced apart teeth.
- the pawl has a pawl tooth that is pivotable about a pivot axis between a first pivot position, in which the pawl tooth is disengaged from the teeth of the dog ring, and a second pivot position in which the pawl tooth engages the teeth of the dog ring.
- the cam follower is mounted to the pawl for common movement about the pivot axis.
- the cam is movable along a movement axis and has first and second cam portions.
- the method includes: providing a first actuator and a second actuator, the first actuator having a first output member, the second actuator having a second output member that is coaxial with the first output member; locking the cam to a first output member; operating the first actuator to move the cam along the movement axis and cause pivoting motion of the pawl between the first and second pivot positions; operating the second actuator to decouple the cam from the first output member; and moving the cam along the movement axis to cause pivoting motion of the pawl from the first position to the second pivot position in response to decoupling the cam from the first output member.
- FIG. 1 is a perspective view of a portion of a driveline component having a park lock mechanism constructed in accordance with the teachings of the present disclosure
- FIG. 2 is a section view of the portion of the driveline component taken through a portion of the park lock mechanism along a movement axis;
- FIG. 3 is an enlarged portion of FIG. 2 .
- a park lock mechanism 10 constructed in accordance with the teachings of the present disclosure is shown in operative association with an exemplary vehicle driveline component 12 .
- the driveline component 12 is a differential case that is rotatable about a driven axis 14 , but those of skill in the art will appreciate that other rotatable elements of a driveline component could be employed in the alternative.
- the park lock mechanism 10 can comprise a housing 20 , a dog ring 22 , a pawl 24 , a pawl spring 26 , and an actuator assembly 28 .
- the housing 20 , the dog ring 22 , the pawl 24 and the pawl spring 26 can be configured in a conventional and well known manner and as such, these components need not be described in significant detail herein.
- the housing 20 can be configured to house a portion of the park lock mechanism 10 and can optionally be configured to house the vehicle driveline component 12 .
- the housing 20 houses portions of the park lock mechanism 10 as well as components associated with a drive module of the type that is disclosed in commonly assigned U.S. Pat. No.
- the dog ring 22 can be an annular structure that can define a plurality of circumferentially spaced apart teeth 30 .
- the dog ring 22 can be mounted to the driveline component 12 for common rotation about the driven axis 14 .
- the pawl 24 can have a pawl tooth 32 and can be mounted to the housing 20 for pivoting motion about a pivot axis 34 between a first pivot position, in which the pawl tooth 32 is disengaged from the teeth 30 of the dog ring 22 so as to not impede rotation of the dog ring 22 relative to the housing 20 , and a second pivot position in which the pawl tooth 32 engages the teeth 30 of the dog ring 22 so as to impede rotation of the dog ring 22 relative to the housing 20 .
- the pivot axis 34 can be parallel to the driven axis 14 .
- the pawl 24 is fixedly mounted on a cylindrically-shaped rail 36 that is rotatably coupled to the housing 20 .
- the pawl spring 26 is configured to bias the pawl 24 toward the first pivot position.
- the pawl spring 26 is a torsion spring that is mounted to the rail 36 and engaged to the housing 20 .
- the actuator assembly 28 can have a cam follower 40 , a cam 42 , a first actuator device 44 , a second actuator device 46 and a cam coupling 48 .
- the cam follower 40 can be coupled to the pawl 24 for movement therewith about the pivot axis 34 .
- the cam follower 40 is a roller that is rotatably mounted to the pawl 24 .
- the cam 42 can be movable along a movement axis 50 that can be parallel to the pivot axis 34 .
- the cam 42 is configured to contact the cam follower 40 and includes a first cam portion 52 , a second cam portion 54 and a transition portion 56 between the first and second cam portions 52 and 54 .
- the first cam portion 52 can be cylindrically shaped and sized to cause the pawl 24 to be positioned in the first pivot position when the first cam portion 52 is positioned in contact with the cam follower 40 .
- the second cam portion 54 can be cylindrically shaped and sized to cause the pawl 24 to be positioned in the second pivot position when the second cam portion 54 is positioned in contact with the cam follower 40 .
- the first actuator device 44 can be any type of linear actuator and can comprise a first linear motor 60 having a first output member 62 that is movable along the movement axis 50 between a first output member position and a second output member position.
- the first linear motor 60 can be configured in any desired manner, but in the particular example provided, the first linear motor 60 comprises a first actuator housing 70 , a rotary motor 72 ( FIG. 1 ), a transmission 74 , a lead screw 76 , a cradle rail 78 , a cradle assembly 80 and the first output member 62 .
- the first actuator housing 70 is configured to be fixedly coupled to the housing 20 and can house desired portions of the first linear motor 60 .
- the rotary motor 72 is fixedly coupled to the first actuator housing 70 .
- the transmission 74 can be mounted to the first actuator housing 70 and can receive rotary power from the rotary motor 72 .
- the lead screw 76 can be rotatably mounted to the first actuator housing 70 and can receive rotary power that is output from the transmission 74 .
- the lead screw 76 can be oriented generally parallel to the movement axis 50 .
- the cradle rail 78 can be mounted to the first actuator housing 70 and can be generally parallel to the lead screw 76 .
- the cradle assembly 80 can comprise a cradle 82 , a cradle body 84 , and a cradle spring 86 .
- the cradle 82 can be slidably mounted on the cradle rail 78 and can include a pair of arms 88 between which the cradle body 84 and the cradle spring 86 can be received.
- the cradle body 84 can be threadably coupled to the lead screw 76 and can be moveable between the arms 88 of the cradle 82 .
- the cradle spring 86 can be mounted on the cradle body 84 and is configured to contact the arms 88 to thereby center the cradle body 84 between the arms 88 .
- the cradle assembly 80 is configured to permit movement of the cradle body 84 relative to the cradle 82 when needed through compression of the cradle spring 86 .
- the first output member 62 can be fixedly coupled to the cradle 82 for movement therewith.
- the first output member 62 can comprise a cylindrical rod-shaped body portion 90 with a hollow, longitudinally extending cavity 92 , a pair of detent holes 94 that are formed through the body portion 90 and intersect the cavity 92 , a slotted aperture 96 that is formed through the body portion 90 and intersects the cavity 92 , and an interior end wall 98 that forms a closed end of the cavity 92 .
- the first output member 62 can be coaxial with the cam 42 and in the particular example provided, the cam 42 is slidably and concentrically mounted on the first output member 62 .
- the second actuator device 46 can be any type of linear actuator, such as a solenoid having an electromagnetic coil 100 and a second output member 102 that can be moved relative to the electromagnetic coil between a third output member position and a fourth output member position.
- the electromagnetic coil 100 and the second output member 102 can be coaxial with the first output member 62 .
- the second output member 102 can be an annular structure that is coupled to the first output member 62 in such a way that the second output member 102 can slide on the first output member 62 between two predetermined points.
- a pin 106 is employed to limit movement of the second output member 102 relative to the first output member 62 .
- the pin 106 can be fixedly coupled to and extend through the second output member 102 such that movement of the second output member 102 along the movement axis 50 causes corresponding movement of the pin 106 .
- the pin 106 can be received in the slotted aperture 96 formed in the first output member 62 .
- the second output member 102 can be moved along the movement axis 50 such that the pin 106 is disposed between the opposite ends of the slotted aperture 96 so that movement of the second output member 102 is not effected by the first output member 62 and/or so movement of the second output member 102 does not effect movement of the first output member 62 .
- the cam coupling 48 can include a first biasing spring 110 and a locking mechanism 112 .
- the first biasing spring 110 can be configured to bias the cam 42 in a first direction along the movement axis 50 relative to the first output member 62 , such as toward the second output member 102 .
- the first biasing spring 110 is a helical coil spring that is received in a bore 120 in the cam 42 and mounted coaxially about the first output member 62 between a keeper 122 , which is received in the bore 120 and fixedly mounted to both the first output member 62 and the cam 42 , and a shoulder 124 in the cam 42 that is defined by the bore 120 .
- the locking mechanism 112 is configured to selectively lock the cam 42 to the first output member 62 for common axial movement along the movement axis 50 .
- the locking mechanism 112 can be configured to unlock the cam 42 from the first output member 62 in response to movement of the second output member 102 in a predetermined manner.
- the locking mechanism 112 is configured to unlock the cam 42 from the first output member 62 in response to movement of the second output member 102 from the third output member position to the fourth output member position when the first output member 62 is in the first output member position.
- the locking mechanism 112 can also be configured to coordinate the locking of the cam 42 to the first output member 62 in response to movement of the second output member 102 in a predetermined manner.
- the locking mechanism 112 is configured to coordinate the locking of the cam 42 to the first output member 62 in response to movement of the second output member 102 from the fourth output member position to the third output member position when the first output member 62 is in the first output member position.
- the locking mechanism 112 can be configured in any desired manner, but in the particular example provided, the locking mechanism 112 is configured in the form of a detent mechanism having a plunger 130 , one or more balls 132 , one or more detent holes 94 (e.g., in the first output member 62 ), one or more recesses 136 (e.g., in the cam 42 ) and a second biasing spring 138 .
- the detent holes 94 can be formed through the first output member 62 and can be disposed generally perpendicular to a longitudinal axis of the first output member 62 (which can be parallel to the movement axis 50 ), for example.
- Each of the detent holes 94 is sized to receive a corresponding one of the balls 132 there through.
- the recesses 136 can be sized and shaped to receive a portion of a corresponding one of the balls 132 therein.
- the plunger 130 can be fixedly coupled to the second output member 102 for axial movement therewith, such as via the pin 106 that extends through the first and second output members 62 and 102 .
- the plunger 130 can have a body 140 and an engagement profile 142 that can contact the balls 132 .
- the engagement profile 142 can comprise a ramped portion 144 , a stop member 146 and a necked-down portion 148 that can be disposed axially between the ramped portion 144 and the stop member 146 .
- the ramped portion 144 can be configured to drive the balls 132 through the first output member 62 and into engagement with the recesses 136 in the cam 42 .
- the necked-down portion 148 can provide sufficient space in a radial direction that permits the balls 132 to move out of the recesses 136 so that the cam 42 can move along the movement axis 50 relative to the first output member 62 .
- the ramped portion 144 can extend directly from the body 140 and can be contoured in any desired manner such that an outer surface of the engagement profile 142 reduces in diameter with decreasing distance to the necked-down portion 148 .
- the ramped portion 144 could be defined by a radius, or could be shaped in a frusto-conical manner as is depicted in the particular example provided.
- the necked-down portion 148 can be shaped as a cylindrical segment.
- the stop member 146 can be configured to engage the balls 132 to limit movement of the plunger 130 relative to the first output member 62 in the first direction along the movement axis 50 .
- the second biasing spring 138 can be coaxial with the first output member 62 and can be disposed in the cavity 92 between the first output member 62 and the second output member 102 so as to bias the second output member 102 in the second direction along the movement axis 50 relative to the first output member 62 . It will be appreciated that the second biasing spring 138 can bias the plunger 130 , the pin 106 and the second output member 102 in the second direction relative to the first output member 62 .
- the second biasing spring 138 is not configured to counteract the first biasing spring 110 and as such, the second biasing spring 138 will not cause movement of the plunger 130 , the pin 106 and the second output member 102 in the second direction relative to the first output member 62 .
- the locking mechanism 112 is in a locked condition that locks the first output member 62 to the cam 42 for common movement along the movement axis 50 .
- the ramped portion 144 of the plunger 130 urges the balls 132 in a radially outwardly direction through the detent holes 94 in the first output member 62 and into the recesses 136 in the cam 42 to thereby lock the cam 42 to the first output member 62 .
- the first actuator device 44 is operated to cause corresponding motion of the first output member 62 in the first and second directions along the movement axis 50 between the first and second output member positions, which causes corresponding pivoting movement of the pawl 24 between the first and second pivot positions.
- the second actuator device 44 can be operated to move the second output member 102 from the third output member position to the fourth output member position to cause motion of the plunger 130 in the second direction along the movement axis 50 to cause the locking mechanism 112 to operate in an unlocked condition.
- the plunger 130 can move with the second output member 102 so that the necked-down portion 148 of the plunger 130 is disposed in-line with the balls 132 so that the force exerted on the cam 42 by the first biasing spring 110 can urge the balls 132 to move in a radially inward direction and disengage the recesses 136 to permit the cam 42 to be moved in the first direction along the movement axis 50 .
- the cam 42 can be re-coupled to the first output member 62 through operation of the first actuator device 44 .
- the first actuator device 44 can be operated to cause movement of the first output member 62 in the first direction.
- the second biasing spring 138 can urge the plunger 130 away from the first output member 62 during movement of the first output member 62 in the first direction so that the first output member 62 , as well as the balls 132 that are captured in the detent holes 94 in the first output member 62 , are moved in the first direction relative to the plunger 130 and the cam 42 .
- the balls 132 are moved along the engagement profile 142 on the plunger 130 and onto the ramped portion 144 so that the balls 132 are urged radially outwardly by the plunger and into the recesses 136 in the cam 42 to thereby operate the locking mechanism 112 in the locked condition, which locks the cam 42 to the first output member 62 .
- the first actuator device 44 can be operated to drive the first output member 62 in the second direction into the first output member position to cause corresponding pivoting movement of the pawl 24 into the first pivot position.
- the second actuator device 44 could be of a type that can be operated to cause movement of the second output member 102 relative to the first output member 62 in the second direction along the movement axis toward the third output member position. Movement of the second output member 102 in this manner can move the pin 106 in the slotted aperture 96 in the first output member 62 , as well as move the plunger 130 and the cam 42 in a corresponding manner.
- the present disclosure provides a method for operating a park lock mechanism.
- the method includes: providing a first actuator and a second actuator, the first actuator having a first output member, the second actuator having a second output member that is coaxial with the first output member; locking the cam to a first output member; operating the first actuator to move the cam along the movement axis and cause pivoting motion of the pawl between the first and second pivot positions; decoupling the cam from the first output member; and operating the second actuator to move the cam along the movement axis and cause pivoting motion of the pawl between the first and second pivot positions.
- movement of the cam to cause pivoting motion of the pawl into the first pivot position when the second actuator is operated can cause the cam to be recoupled to first output member.
- decoupling the cam from the first output member causes the cam to be moved along the movement axis such that the pawl pivots into the second pivot position.
- park lock mechanism 10 driveline component 12 driven axis 14 housing 20 dog ring 22 pawl 24 pawl spring 26 actuator assembly 28 teeth 30 pawl tooth 32 pivot axis 34 rail 36 cam follower 40 cam 42 first actuator device 44 second actuator device 46 cam coupling 48 movement axis 50 first cam portion 52 second cam portion 54 transition portion 56 first linear motor 60 first output member 62 first actuator housing 70 rotary motor 72 transmission 74 lead screw 76 cradle rail 78 cradle assembly 80 cradle 82 cradle body 84 cradle spring 86 arms 88 body portion 90 cavity 92 detent holes 94 slotted aperture 96 interior end wall 98 electromagnetic coil 100 second output member 102 pin 106 first biasing spring 110 locking mechanism 112 bore 120 keeper 122 shoulder 124 plunger 130 ball 132 recess 136 second biasing spring 138 body 140 engagement profile 142 ramped portion 144 stop member 146 necked-down portion 148
Abstract
Description
- The present disclosure relates to a park lock mechanism.
- This section provides background information related to the present disclosure which is not necessarily prior art.
- Park lock mechanisms are commonly integrated into transmissions and vehicle driveline components and help to immobilize a vehicle when the vehicle is parked and not in use. Known park lock mechanism typically include a dog ring, which is coupled to a rotatable component of the driveline component for common rotation, and a pawl that is selectively engagable with the dog ring. While the known park lock mechanisms are suitable for their intended purpose, they nevertheless remain susceptible to improvement.
- This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.
- In one form, the present teachings provide a park lock mechanism for a vehicle driveline component that has a rotatable member. The park lock mechanism includes a housing, a dog ring, a pawl, a pawl spring and an actuator assembly. The dog ring is configured to be coupled to the rotatable member for common rotation. The dog ring is received in the housing and has a plurality of circumferentially spaced apart teeth. The pawl has a pawl tooth and is pivotably coupled to the housing for movement about a pivot axis between a first pivot position, in which the pawl tooth is disengaged from the teeth of the dog ring so as to not impede rotation of the dog ring relative to the housing, and a second pivot position in which the pawl tooth engages the teeth of the dog ring so as to impede rotation of the dog ring relative to the housing. The pawl spring biases the pawl toward the second pivot position. The actuator assembly has a cam follower, a cam, a first actuator device, a second actuator device, and a cam coupling. The cam follower is coupled to the pawl for movement therewith about the pivot axis. The cam is movable along a movement axis that is parallel to the pivot axis. The cam contacts the follower and includes a first cam portion and a second cam portion. Positioning of the first cam portion on the cam follower positions the pawl in the first pivot position, and positioning of the second cam portion on the cam follower positions the pawl in the second pivot position. The first actuator device includes a first linear motor with a first output member that is movable along the movement axis between a first output member position and a second output member position. The first output member is coaxial with the cam. The second actuator device includes a second linear motor with a second output member. The second output member is movable along the movement axis between a third output member position and a fourth output member position. The second output member is coaxial with the first output member. The cam coupling includes a first biasing spring and a locking mechanism. The first biasing spring is configured to bias the cam in a first direction along the movement axis relative to the first output member. The locking mechanism is configured to selectively lock the cam to the first output member for axial movement therewith. The locking mechanism is configured to unlock the cam from the first output member in response to movement of the second output member from the third output member position to the fourth output member position when the first output member is in the first output member position. The locking mechanism is configured to lock the cam to the first output member in response to movement of the second output member from the fourth output member position to the third output member position when the first output member is in the first output member position.
- In another form, the present teachings provide a park lock mechanism for a vehicle driveline component that has a rotatable member. The park lock mechanism includes a housing, a dog ring, a pawl, a pawl spring and an actuator assembly. The dog ring is configured to be coupled to the rotatable member for common rotation. The dog ring is received in the housing and has a plurality of circumferentially spaced apart teeth. The pawl has a pawl tooth and is pivotably coupled to the housing for movement about a pivot axis between a first pivot position, in which the pawl tooth is disengaged from the teeth of the dog ring so as to not impede rotation of the dog ring relative to the housing, and a second pivot position in which the pawl tooth engages the teeth of the dog ring so as to impede rotation of the dog ring relative to the housing. The pawl spring biases the pawl toward the second pivot position. The actuator assembly has a first linear actuator, a locking mechanism, a first biasing spring and a second linear actuator. The first linear actuator has a first output member that is movable along a movement axis that is parallel to the pivot axis. The locking mechanism is configured to selectively couple the first output member and the cam for common movement along the movement axis. The first biasing spring is configured to move the cam along the movement axis relative to the first output member when the locking mechanism decouples the cam from the first output member. The second linear actuator is configured to operate the locking mechanism to decouple the cam from the first output member to permit the first biasing spring to move the cam along the movement axis.
- In still another form, the present teachings provide a method for operating a park lock mechanism having a dog ring, a pawl, a cam follower and a cam. The dog ring is rotatable about a drive axis and has a plurality of circumferentially spaced apart teeth. The pawl has a pawl tooth that is pivotable about a pivot axis between a first pivot position, in which the pawl tooth is disengaged from the teeth of the dog ring, and a second pivot position in which the pawl tooth engages the teeth of the dog ring. The cam follower is mounted to the pawl for common movement about the pivot axis. The cam is movable along a movement axis and has first and second cam portions. Positioning of the first cam portion on the cam follower positions the pawl in the first pivot position. Positioning of the second cam portion on the cam follower positions the pawl in the second pivot position. The method includes: providing a first actuator and a second actuator, the first actuator having a first output member, the second actuator having a second output member that is coaxial with the first output member; locking the cam to a first output member; operating the first actuator to move the cam along the movement axis and cause pivoting motion of the pawl between the first and second pivot positions; operating the second actuator to decouple the cam from the first output member; and moving the cam along the movement axis to cause pivoting motion of the pawl from the first position to the second pivot position in response to decoupling the cam from the first output member.
- Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
- The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
-
FIG. 1 is a perspective view of a portion of a driveline component having a park lock mechanism constructed in accordance with the teachings of the present disclosure; -
FIG. 2 is a section view of the portion of the driveline component taken through a portion of the park lock mechanism along a movement axis; and -
FIG. 3 is an enlarged portion ofFIG. 2 . - Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.
- With reference to
FIGS. 1 and 2 of the drawings, apark lock mechanism 10 constructed in accordance with the teachings of the present disclosure is shown in operative association with an exemplaryvehicle driveline component 12. In the particular example provided, thedriveline component 12 is a differential case that is rotatable about a drivenaxis 14, but those of skill in the art will appreciate that other rotatable elements of a driveline component could be employed in the alternative. - The
park lock mechanism 10 can comprise ahousing 20, adog ring 22, apawl 24, apawl spring 26, and anactuator assembly 28. Thehousing 20, thedog ring 22, thepawl 24 and thepawl spring 26 can be configured in a conventional and well known manner and as such, these components need not be described in significant detail herein. Briefly, thehousing 20 can be configured to house a portion of thepark lock mechanism 10 and can optionally be configured to house thevehicle driveline component 12. In the example provide, thehousing 20 houses portions of thepark lock mechanism 10 as well as components associated with a drive module of the type that is disclosed in commonly assigned U.S. Pat. No. 8,663,051 entitled “Axle Assembly With Torque Distribution Drive Mechanism”, the disclosure of which is incorporated by reference as if fully set forth in detail herein. Thedog ring 22 can be an annular structure that can define a plurality of circumferentially spaced apartteeth 30. Thedog ring 22 can be mounted to thedriveline component 12 for common rotation about the drivenaxis 14. Thepawl 24 can have apawl tooth 32 and can be mounted to thehousing 20 for pivoting motion about apivot axis 34 between a first pivot position, in which thepawl tooth 32 is disengaged from theteeth 30 of thedog ring 22 so as to not impede rotation of thedog ring 22 relative to thehousing 20, and a second pivot position in which thepawl tooth 32 engages theteeth 30 of thedog ring 22 so as to impede rotation of thedog ring 22 relative to thehousing 20. Thepivot axis 34 can be parallel to the drivenaxis 14. In the example provided, thepawl 24 is fixedly mounted on a cylindrically-shapedrail 36 that is rotatably coupled to thehousing 20. Thepawl spring 26 is configured to bias thepawl 24 toward the first pivot position. In the example provided, thepawl spring 26 is a torsion spring that is mounted to therail 36 and engaged to thehousing 20. - The
actuator assembly 28 can have acam follower 40, acam 42, afirst actuator device 44, asecond actuator device 46 and acam coupling 48. Thecam follower 40 can be coupled to thepawl 24 for movement therewith about thepivot axis 34. In the example provided, thecam follower 40 is a roller that is rotatably mounted to thepawl 24. - With reference to
FIGS. 2 and 3 , thecam 42 can be movable along amovement axis 50 that can be parallel to thepivot axis 34. Thecam 42 is configured to contact thecam follower 40 and includes afirst cam portion 52, asecond cam portion 54 and atransition portion 56 between the first andsecond cam portions first cam portion 52 can be cylindrically shaped and sized to cause thepawl 24 to be positioned in the first pivot position when thefirst cam portion 52 is positioned in contact with thecam follower 40. Thesecond cam portion 54 can be cylindrically shaped and sized to cause thepawl 24 to be positioned in the second pivot position when thesecond cam portion 54 is positioned in contact with thecam follower 40. - With specific reference to
FIG. 2 , thefirst actuator device 44 can be any type of linear actuator and can comprise a firstlinear motor 60 having afirst output member 62 that is movable along themovement axis 50 between a first output member position and a second output member position. The firstlinear motor 60 can be configured in any desired manner, but in the particular example provided, the firstlinear motor 60 comprises afirst actuator housing 70, a rotary motor 72 (FIG. 1 ), atransmission 74, alead screw 76, acradle rail 78, acradle assembly 80 and thefirst output member 62. Thefirst actuator housing 70 is configured to be fixedly coupled to thehousing 20 and can house desired portions of the firstlinear motor 60. Therotary motor 72 is fixedly coupled to thefirst actuator housing 70. Thetransmission 74 can be mounted to thefirst actuator housing 70 and can receive rotary power from therotary motor 72. Thelead screw 76 can be rotatably mounted to thefirst actuator housing 70 and can receive rotary power that is output from thetransmission 74. Thelead screw 76 can be oriented generally parallel to themovement axis 50. Thecradle rail 78 can be mounted to thefirst actuator housing 70 and can be generally parallel to thelead screw 76. Thecradle assembly 80 can comprise acradle 82, acradle body 84, and acradle spring 86. Thecradle 82 can be slidably mounted on thecradle rail 78 and can include a pair ofarms 88 between which thecradle body 84 and thecradle spring 86 can be received. Thecradle body 84 can be threadably coupled to thelead screw 76 and can be moveable between thearms 88 of thecradle 82. Thecradle spring 86 can be mounted on thecradle body 84 and is configured to contact thearms 88 to thereby center thecradle body 84 between thearms 88. Thecradle assembly 80 is configured to permit movement of thecradle body 84 relative to thecradle 82 when needed through compression of thecradle spring 86. Thefirst output member 62 can be fixedly coupled to thecradle 82 for movement therewith. - With reference to
FIG. 3 , thefirst output member 62 can comprise a cylindrical rod-shapedbody portion 90 with a hollow, longitudinally extendingcavity 92, a pair of detent holes 94 that are formed through thebody portion 90 and intersect thecavity 92, a slottedaperture 96 that is formed through thebody portion 90 and intersects thecavity 92, and aninterior end wall 98 that forms a closed end of thecavity 92. Thefirst output member 62 can be coaxial with thecam 42 and in the particular example provided, thecam 42 is slidably and concentrically mounted on thefirst output member 62. - The
second actuator device 46 can be any type of linear actuator, such as a solenoid having anelectromagnetic coil 100 and asecond output member 102 that can be moved relative to the electromagnetic coil between a third output member position and a fourth output member position. Theelectromagnetic coil 100 and thesecond output member 102 can be coaxial with thefirst output member 62. For example, thesecond output member 102 can be an annular structure that is coupled to thefirst output member 62 in such a way that thesecond output member 102 can slide on thefirst output member 62 between two predetermined points. In the example provided, apin 106 is employed to limit movement of thesecond output member 102 relative to thefirst output member 62. Thepin 106 can be fixedly coupled to and extend through thesecond output member 102 such that movement of thesecond output member 102 along themovement axis 50 causes corresponding movement of thepin 106. Thepin 106 can be received in the slottedaperture 96 formed in thefirst output member 62. Those of skill in the art will appreciate that thesecond output member 102 can be moved along themovement axis 50 such that thepin 106 is disposed between the opposite ends of the slottedaperture 96 so that movement of thesecond output member 102 is not effected by thefirst output member 62 and/or so movement of thesecond output member 102 does not effect movement of thefirst output member 62. - The
cam coupling 48 can include afirst biasing spring 110 and alocking mechanism 112. Thefirst biasing spring 110 can be configured to bias thecam 42 in a first direction along themovement axis 50 relative to thefirst output member 62, such as toward thesecond output member 102. In the example provided, thefirst biasing spring 110 is a helical coil spring that is received in abore 120 in thecam 42 and mounted coaxially about thefirst output member 62 between akeeper 122, which is received in thebore 120 and fixedly mounted to both thefirst output member 62 and thecam 42, and ashoulder 124 in thecam 42 that is defined by thebore 120. - The
locking mechanism 112 is configured to selectively lock thecam 42 to thefirst output member 62 for common axial movement along themovement axis 50. Thelocking mechanism 112 can be configured to unlock thecam 42 from thefirst output member 62 in response to movement of thesecond output member 102 in a predetermined manner. In the particular example provided, thelocking mechanism 112 is configured to unlock thecam 42 from thefirst output member 62 in response to movement of thesecond output member 102 from the third output member position to the fourth output member position when thefirst output member 62 is in the first output member position. - The
locking mechanism 112 can also be configured to coordinate the locking of thecam 42 to thefirst output member 62 in response to movement of thesecond output member 102 in a predetermined manner. In the particular example provided, thelocking mechanism 112 is configured to coordinate the locking of thecam 42 to thefirst output member 62 in response to movement of thesecond output member 102 from the fourth output member position to the third output member position when thefirst output member 62 is in the first output member position. - The
locking mechanism 112 can be configured in any desired manner, but in the particular example provided, thelocking mechanism 112 is configured in the form of a detent mechanism having aplunger 130, one ormore balls 132, one or more detent holes 94 (e.g., in the first output member 62), one or more recesses 136 (e.g., in the cam 42) and asecond biasing spring 138. The detent holes 94 can be formed through thefirst output member 62 and can be disposed generally perpendicular to a longitudinal axis of the first output member 62 (which can be parallel to the movement axis 50), for example. Each of the detent holes 94 is sized to receive a corresponding one of theballs 132 there through. Therecesses 136 can be sized and shaped to receive a portion of a corresponding one of theballs 132 therein. - The
plunger 130 can be fixedly coupled to thesecond output member 102 for axial movement therewith, such as via thepin 106 that extends through the first andsecond output members plunger 130 can have abody 140 and anengagement profile 142 that can contact theballs 132. Theengagement profile 142 can comprise a rampedportion 144, astop member 146 and a necked-downportion 148 that can be disposed axially between the rampedportion 144 and thestop member 146. The rampedportion 144 can be configured to drive theballs 132 through thefirst output member 62 and into engagement with therecesses 136 in thecam 42. The necked-downportion 148 can provide sufficient space in a radial direction that permits theballs 132 to move out of therecesses 136 so that thecam 42 can move along themovement axis 50 relative to thefirst output member 62. The rampedportion 144 can extend directly from thebody 140 and can be contoured in any desired manner such that an outer surface of theengagement profile 142 reduces in diameter with decreasing distance to the necked-downportion 148. For example, the rampedportion 144 could be defined by a radius, or could be shaped in a frusto-conical manner as is depicted in the particular example provided. The necked-downportion 148 can be shaped as a cylindrical segment. Thestop member 146 can be configured to engage theballs 132 to limit movement of theplunger 130 relative to thefirst output member 62 in the first direction along themovement axis 50. Thesecond biasing spring 138 can be coaxial with thefirst output member 62 and can be disposed in thecavity 92 between thefirst output member 62 and thesecond output member 102 so as to bias thesecond output member 102 in the second direction along themovement axis 50 relative to thefirst output member 62. It will be appreciated that thesecond biasing spring 138 can bias theplunger 130, thepin 106 and thesecond output member 102 in the second direction relative to thefirst output member 62. In the example provided, thesecond biasing spring 138 is not configured to counteract thefirst biasing spring 110 and as such, thesecond biasing spring 138 will not cause movement of theplunger 130, thepin 106 and thesecond output member 102 in the second direction relative to thefirst output member 62. - During standard operation of the park lock mechanism 10 (
FIG. 2 ), thelocking mechanism 112 is in a locked condition that locks thefirst output member 62 to thecam 42 for common movement along themovement axis 50. In the locked condition, the rampedportion 144 of theplunger 130 urges theballs 132 in a radially outwardly direction through the detent holes 94 in thefirst output member 62 and into therecesses 136 in thecam 42 to thereby lock thecam 42 to thefirst output member 62. Thefirst actuator device 44 is operated to cause corresponding motion of thefirst output member 62 in the first and second directions along themovement axis 50 between the first and second output member positions, which causes corresponding pivoting movement of thepawl 24 between the first and second pivot positions. - In the event that the
first output member 62 is not able to move from the first output member position to the second output member position, thesecond actuator device 44 can be operated to move thesecond output member 102 from the third output member position to the fourth output member position to cause motion of theplunger 130 in the second direction along themovement axis 50 to cause thelocking mechanism 112 to operate in an unlocked condition. In this regard, theplunger 130 can move with thesecond output member 102 so that the necked-downportion 148 of theplunger 130 is disposed in-line with theballs 132 so that the force exerted on thecam 42 by thefirst biasing spring 110 can urge theballs 132 to move in a radially inward direction and disengage therecesses 136 to permit thecam 42 to be moved in the first direction along themovement axis 50. Thecam 42 can be re-coupled to thefirst output member 62 through operation of thefirst actuator device 44. In this regard, thefirst actuator device 44 can be operated to cause movement of thefirst output member 62 in the first direction. Since thepin 106 is received in the slottedaperture 96 in thefirst output member 62, movement of thefirst output member 62 in the first direction does not cause corresponding motion of theplunger 130, thepin 106, thesecond output member 102 or thecam 42. Moreover, thesecond biasing spring 138 can urge theplunger 130 away from thefirst output member 62 during movement of thefirst output member 62 in the first direction so that thefirst output member 62, as well as theballs 132 that are captured in the detent holes 94 in thefirst output member 62, are moved in the first direction relative to theplunger 130 and thecam 42. It will be appreciated that theballs 132 are moved along theengagement profile 142 on theplunger 130 and onto the rampedportion 144 so that theballs 132 are urged radially outwardly by the plunger and into therecesses 136 in thecam 42 to thereby operate thelocking mechanism 112 in the locked condition, which locks thecam 42 to thefirst output member 62. Thereafter, thefirst actuator device 44 can be operated to drive thefirst output member 62 in the second direction into the first output member position to cause corresponding pivoting movement of thepawl 24 into the first pivot position. - Alternatively, the
second actuator device 44 could be of a type that can be operated to cause movement of thesecond output member 102 relative to thefirst output member 62 in the second direction along the movement axis toward the third output member position. Movement of thesecond output member 102 in this manner can move thepin 106 in the slottedaperture 96 in thefirst output member 62, as well as move theplunger 130 and thecam 42 in a corresponding manner. Since theballs 132 are held in the detent holes 94 in thefirst output member 62 and ride on theengagement profile 142 of theplunger 130, coordinated movement of theplunger 130 and thecam 42 in the second direction relative to thefirst output member 62 permits theballs 132 to be forced radially outwardly and into therecesses 136 so that thelocking mechanism 112 is operated in the locked condition to fix thecam 42 to thefirst output member 62. Since thefirst output member 62 is in the first output member position, thecam 42 is locked to thefirst output member 62 at a location that corresponds with the positioning of thepawl 24 in the first pivot position. - In view of the above discussion, those of skill in the art will appreciate that the present disclosure provides a method for operating a park lock mechanism. The method includes: providing a first actuator and a second actuator, the first actuator having a first output member, the second actuator having a second output member that is coaxial with the first output member; locking the cam to a first output member; operating the first actuator to move the cam along the movement axis and cause pivoting motion of the pawl between the first and second pivot positions; decoupling the cam from the first output member; and operating the second actuator to move the cam along the movement axis and cause pivoting motion of the pawl between the first and second pivot positions. Optionally, movement of the cam to cause pivoting motion of the pawl into the first pivot position when the second actuator is operated can cause the cam to be recoupled to first output member. Also optionally, decoupling the cam from the first output member causes the cam to be moved along the movement axis such that the pawl pivots into the second pivot position.
- The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
-
park lock mechanism 10 driveline component 12 driven axis 14 housing 20 dog ring 22 pawl 24 pawl spring 26 actuator assembly 28 teeth 30 pawl tooth 32 pivot axis 34 rail 36 cam follower 40 cam 42 first actuator device 44 second actuator device 46 cam coupling 48 movement axis 50 first cam portion 52 second cam portion 54 transition portion 56 first linear motor 60 first output member 62 first actuator housing 70 rotary motor 72 transmission 74 lead screw 76 cradle rail 78 cradle assembly 80 cradle 82 cradle body 84 cradle spring 86 arms 88 body portion 90 cavity 92 detent holes 94 slotted aperture 96 interior end wall 98 electromagnetic coil 100 second output member 102 pin 106 first biasing spring 110 locking mechanism 112 bore 120 keeper 122 shoulder 124 plunger 130 ball 132 recess 136 second biasing spring 138 body 140 engagement profile 142 ramped portion 144 stop member 146 necked-down portion 148
Claims (21)
Priority Applications (6)
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US14/475,660 US9255640B1 (en) | 2014-09-03 | 2014-09-03 | Park lock mechanism |
BR102015020051A BR102015020051A8 (en) | 2014-09-03 | 2015-08-20 | parking lock mechanism |
DE102015114075.6A DE102015114075A1 (en) | 2014-09-03 | 2015-08-25 | Parking lock mechanism |
RU2015136386A RU2015136386A (en) | 2014-09-03 | 2015-08-27 | PARKING LOCK MECHANISM |
CN201510555878.6A CN105387203B (en) | 2014-09-03 | 2015-09-02 | A kind of parking latch mechanism and its operating method |
US15/008,503 US9920834B2 (en) | 2014-09-03 | 2016-01-28 | Park lock mechanism |
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US14/475,660 US9255640B1 (en) | 2014-09-03 | 2014-09-03 | Park lock mechanism |
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DE102011085717A1 (en) * | 2010-12-08 | 2012-06-14 | Schaeffler Technologies Gmbh & Co. Kg | Parking lock for motor vehicle, has pawl pivoted about rotation axis, where pawl tooth is provided for engagement with locking teeth |
JP5738136B2 (en) * | 2011-09-13 | 2015-06-17 | アイシン・エーアイ株式会社 | transmission |
DE102012004157A1 (en) * | 2012-03-05 | 2013-09-05 | Svm Schultz Verwaltungs-Gmbh & Co. Kg | locking unit |
US8881883B2 (en) * | 2012-04-30 | 2014-11-11 | Tesla Motors, Inc. | Park lock for narrow transmission |
DE102012210571A1 (en) * | 2012-06-22 | 2013-12-24 | Zf Friedrichshafen Ag | Device for actuating a locking mechanism |
DE102012012672A1 (en) * | 2012-06-23 | 2013-01-17 | Daimler Ag | Parking lock device for gear box of motor vehicle, comprises rotation axis gear element rotationally fixed to rotatable gear connected to blocking element, where spring element arrangement has actuating unit |
DE102012013373A1 (en) * | 2012-07-04 | 2014-01-09 | Audi Ag | Adjustment device for a parking lock operation |
US9353859B2 (en) * | 2014-09-03 | 2016-05-31 | E-Aam Driveline Systems Ab | Park lock mechanism |
US9255640B1 (en) * | 2014-09-03 | 2016-02-09 | E-Aam Driveline Systems Ab | Park lock mechanism |
US9394993B2 (en) * | 2014-09-03 | 2016-07-19 | E-Aam Driveline Systems Ab | Park lock mechanism |
-
2014
- 2014-09-03 US US14/475,660 patent/US9255640B1/en active Active
-
2015
- 2015-08-20 BR BR102015020051A patent/BR102015020051A8/en not_active Application Discontinuation
- 2015-08-25 DE DE102015114075.6A patent/DE102015114075A1/en active Pending
- 2015-08-27 RU RU2015136386A patent/RU2015136386A/en not_active Application Discontinuation
- 2015-09-02 CN CN201510555878.6A patent/CN105387203B/en active Active
-
2016
- 2016-01-28 US US15/008,503 patent/US9920834B2/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106051154A (en) * | 2016-05-23 | 2016-10-26 | 广州汽车集团股份有限公司 | Electric parking mechanism and automobile |
CN107763121A (en) * | 2016-08-17 | 2018-03-06 | 通用汽车环球科技运作有限责任公司 | For automatic transmission parking actuator and include the speed changer of parking actuator |
US10914378B2 (en) * | 2019-05-07 | 2021-02-09 | GM Global Technology Operations LLC | Roller-gear shift by wire parking system |
US11892041B2 (en) | 2019-10-01 | 2024-02-06 | Bayerische Motoren Werke Aktiengesellschaft | Coupling device, in particular for a drive train of a motor vehicle, and drive device for a motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
BR102015020051A2 (en) | 2016-03-08 |
BR102015020051A8 (en) | 2016-03-29 |
US9255640B1 (en) | 2016-02-09 |
CN105387203A (en) | 2016-03-09 |
US9920834B2 (en) | 2018-03-20 |
CN105387203B (en) | 2018-07-20 |
US20160153558A1 (en) | 2016-06-02 |
RU2015136386A (en) | 2017-03-03 |
DE102015114075A1 (en) | 2016-03-03 |
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