DE102016207731B4 - Locking actuator for a transmission of a motor vehicle - Google Patents

Locking actuator for a transmission of a motor vehicle Download PDF

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Publication number
DE102016207731B4
DE102016207731B4 DE102016207731.7A DE102016207731A DE102016207731B4 DE 102016207731 B4 DE102016207731 B4 DE 102016207731B4 DE 102016207731 A DE102016207731 A DE 102016207731A DE 102016207731 B4 DE102016207731 B4 DE 102016207731B4
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Germany
Prior art keywords
toggle
connection
actuator
lock
lever arm
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DE102016207731.7A
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German (de)
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DE102016207731A1 (en
Inventor
Dominik Ströhle
Wolfgang Haas
Dominik Hans
Martin Vornehm
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H63/00Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30Constructional features of the final output mechanisms
    • F16H63/34Locking or disabling mechanisms

Abstract

Locking mechanism for a transmission of a motor vehicle, having a first connection part (2), which is provided for connection to a transmission housing, and a second connection part (3), which is provided for cooperation with a switching element, wherein between the two connection parts (2,3 ) is connected to a variation of the distance between the connecting parts (2,3) formed toggle mechanism (4) and a magnetic actuator (5) in the toggle mechanism (4) is integrated, characterized in that a coil (15) of the magnetic actuator (5) concentric with a hinge (11,12) of the toggle mechanism (4) is arranged.

Description

  • The invention relates to a suitable for a transmission of a motor vehicle lock actuator, with which a certain state of the transmission can be locked, and the use of such a lock actuator in a hybrid vehicle with manual transmission. The lock function represents a mechanical function.
  • From the DE 10 2013 206 851 A1 is a switching device with a gear lock known. In this case, an interpretation of a switched gear or a laying of the neutral position can be blocked by a Gangsperreinrichtung. The gear lock means may be formed as a positive locking unit, wherein a spring-loaded pin can be latched in one or more recesses. Likewise, embodiments of the known switching device can be realized in which a switching element is not blocked, but only an increased switching force is generated, which makes it difficult to move in or out clearly.
  • From the DE 10 2013 213 707 A1 as well as from the DE 10 2011 080 498 A1 Parking locks are known that work with planetary gear drives. For example, a parking lock operating with a trapezoidal screw drive is known from US Pat DE 10 2013 213 706 A1 known.
  • The DE 10 2011 004 063 A1 discloses a switching device with a shift lock, which has two separately prepared locking elements and is adapted to prevent switching of non-preselected shift gates.
  • From the DE 10 2005 057 794 A1 and the DE 10 2014 219 037 A1 a lock actuator with a lever actuator is already well known.
  • From the EP 2 913 563 A1 a hybrid drive unit is known, which comprises a manually operable selection element, which is designed to change gears of a gearbox and to activate an electric motor provided as a drive motor. The operability of the selection element when switching between different driving modes is influenced by a locking mechanism which comprises a locking element cooperating with a locking device.
  • The invention has for its object to provide a relation to the cited prior art further developed, suitable for a transmission of a motor vehicle lock actuator, which is characterized by a particularly favorable ratio between space requirements, ease of installation and reliability.
  • This object is achieved by a lock actuator with the features of claim 1 and by use of such a lock actuator with the features of claim 8. The lock actuator has two connection parts, which on the one hand for connection to a transmission housing and on the other hand, for cooperation with a switching element, in particular a shift fork, the transmission are provided. Connected between the two connecting parts is a toggle mechanism, which is designed to vary the distance between the connecting parts and thus optionally to produce or cancel a blocking function.
  • The locking actuator is particularly suitable for blocking an electromotive operating mode in a hybrid vehicle, as for example in the hybrid drive unit according to the already mentioned EP 2 913 563 A1 is provided. Likewise, the lock actuator for a hybrid drive unit is the post-published in the DE 10 2016 202 117 A1 disclosed type.
  • Thanks to the toggle mechanism, the locking actuator is able to generate high output-side forces with low input-side forces. Due to the high transmission ratio of the toggle mechanism, a blocking force that can be generated by the blocking actuator hardly depends on boundary conditions such as friction or lubrication. The low energy requirement of the lock tractor also facilitates its placement in a transmission, which are given from the outset good lubrication conditions. In general, the lock actuator can either be designed so that it is locked with power and unlocked without power, or such that it is unlocked while energized and locked without power. In principle, a bistable design of the lock actuator comes into consideration, that is, a design in which neither in the locked state nor in the unlocked state, an energy supply is necessary.
  • The lock actuator is actuated by a magnetic actuator integrated with the toggle mechanism. Forces generated by the magnetic actuator, which have an effect on the blocking force of the locking actuator, can be adjusted in a targeted manner by the energization of the magnetic actuator, for which in particular the method of pulse width modulation (PWM) can be used. In addition, the detection of temporal changes in the current flow in the magnetic actuator, in particular the detection of short-term power failures, can be used to reliably detect transitions between different switching states of the barrier actuator. An additional sensor, such as a displacement or angle sensor, the lock actuator is thus replaced by the measurement of electrical variables. To avoid undesirable scatters of the To minimize magnetic flux, components of the toggle mechanism, depending on how far they should be in a magnetic circuit, preferably made of different materials with different permeability. As materials with low permeability, in particular the materials aluminum and / or plastic are used within the toggle mechanism. This applies, for example, to points of contact between various components which are movable relative to one another or to mechanically loaded parts of the toggle mechanism which are intended to be as far outside of each magnetic flux as possible.
  • In a preferred embodiment, the toggle mechanism comprises two lever arms, wherein one of the lever arms with the first connector part and the other lever arm is pivotally coupled to the second connector part and both lever arms by a center joint, which consists of several parts, namely of a plurality of axially spaced apart joint joints in the axial direction, constructed may be coupled to each other, and wherein one of the lever arms projects beyond the central joint in the direction of the other lever arm and in this the center joint projecting portion cooperating contact surfaces of the two lever arms are formed.
  • A first major function of the contact surfaces of the lever arms is the transmission of magnetic forces. The magnetic forces can be generated here with or without permanent magnets. In the case of using permanent magnets, the blocking actuator is preferably designed as a normally locked actuator. This means that the lock actuator remains automatically locked as long as the solenoid actuator is not energized. An unlocking of the normally locked lock actuator is possible by current flow in the solenoid actuator. In contrast, the blocking actuator is preferably designed as a normally open actuator, provided that no permanent magnets are used. In this case, electrical current flow in the solenoid actuator is required to transfer the lock actuator to its closed position and hold it in that position.
  • With regard to a possible structure of an electromagnetic actuator comprising permanent magnets is exemplified in the DE 10 2007 030 405 B3 directed. Other actuators having permanent magnets, for example, from DE 10 2013 208 768 A1 as well as from the DE 10 2012 224 179 A1 known.
  • Another main function of the contact surfaces of the lever arms lies in the limitation of the pivot angle of the lever arms. Preferably, the contact surfaces are designed as stop surfaces, which prevent over-pressing of the toggle mechanism. This means that the two levers of the toggle mechanism are not fully stretched in any state of the lock actuator. The angle between the two levers of the toggle mechanism is thus always less than 180 °. For example, the angle between the levers of the toggle mechanism is a maximum of 174 ° to 178 °, which corresponds to a difference of 6 ° to 2 ° to the stretching of the toggle mechanism. The lack of stretching or even hyperextension of the toggle mechanism is accompanied according to an advantageous design of the lock actuator with the possibility to transfer the lock actuator by manually introduced from the outside forces from its locked to the unlocked state. During such an operation, also referred to as emergency disabling, electrical quantities of the magnetic actuator are preferably detected, as in other operating states as well.
  • By detecting such variables, in particular short-term current and voltage peaks, the manual, quasi-violent opening of the lock actuator can be reliably detected, which in turn allows the possibility of adapted reactions of the control of the magnetic actuator. In particular, the actuation of the magnetic actuator is interpretable such that after a manual opening of the lock actuator no immediate, automatic closing of the lock actuator takes place. Rather, the control of the magnetic actuator is designed such that it adjusts immediately after the manual opening of the toggle mechanism on the thus selected, unlocked switching position of the lock actuator. Regardless of the type of triggering of switching operations are on the measurement of electrical parameters of the lock actuator conclusions as to its temperature or load reserves, possible. Depending on ambient conditions, such as component temperatures, a short-term overcurrent of the coil of the magnetic actuator is possible. If an attempted by the user, by the actuation of the Magnetaktors not prompted, but detected in a change in electrical magnitudes of the Magnetaktors rudimentary approach switching detected, the continuation of this switching operation can be supported by changing the energization of the magnetic actuator.
  • In a preferred geometric design of the lock actuator whose connecting parts each have a U-shape, each U to the toggle mechanism open and outward, that is to the transmission housing or to the switching element out, is closed. The respectively lying between two U-legs middle pieces of the two U-shaped connecting parts are thus mirror-symmetrical to each other, in particular parallel to each other, aligned by the toggle mechanism. In addition to the two connection parts preferably also has at least one of the lever arms the toggle mechanism on a U-shape. The U-shaped lever arm is in this case articulated on the two legs of a U-shaped connecting part. There are thus two spaced-apart articulation points, which define a joint between the connecting part and the U-shaped lever arm. The coil of the magnetic actuator according to the invention is arranged concentrically to this joint between the two articulation points. In this case, the coil can either be rigidly connected to the connecting part or swing with the U-shaped lever arm of the toggle mechanism.
  • The second lever of the toggle mechanism, unlike the U-shaped lever arm, preferably has an H-shape. The middle joint of the toggle mechanism is arranged in the form of two individual joints in an open portion of the H-shaped lever arm. The H-shaped lever arm protrudes beyond the two individual joints, wherein in this region projecting beyond the middle joint, the contact surfaces are preferably in contact with which the H-shaped lever arm comes into contact with the U-shaped lever arm in the maximally elongated form of the locking actuator. The outer contours of the two U-shaped connecting parts preferably represent discontinuous contours of an imaginary rectangle, within which the toggle mechanism is arranged.
  • The toggle mechanism is loaded in a preferred embodiment by spring force. For example, a spring may act on the middle joint of the toggle mechanism for this purpose. In a particularly advantageous, space-saving embodiment, a spring is provided, which is effective between one of the connecting parts and the U-shaped lever arm. The joint between this lever arm and the connection part is in this case running free of play or play. In contrast, it is in the opposite hinge of the toggle mechanism, which is formed between the second, preferably H-shaped lever arm and the second connection part, preferably a play-hinged joint, which can be realized for example by means of a slot guide in the second connector part. A playful leadership of the second lever arm on the second connection part can also be combined with a spring which acts directly on the center joint between the two lever arms. In any case, the spring loading of the toggle mechanism, for example, a single leg spring or an arrangement of several leg springs suitable.
  • The lock actuator is particularly suitable for use in a hybrid manual transmission. With regard to possible features of a hybrid manual transmission is on the DE 10 2007 052 261 A1 directed.
  • An embodiment of the invention will be explained in more detail with reference to a drawing. Herein show:
    • 1 a perspective view of a lock actuator for a transmission of a motor vehicle,
    • 2 the lock actuator in front view with indicated magnetic flux,
    • 3 and 4 in different switching states the lock actuator in side view,
    • 5 the lock tractor in top view.
  • A total with the reference numeral 1 characterized lock actuator is designed as an electromagnetic actuator and provided for use in a transmission, namely manual transmission, a motor vehicle. A first connection part 2 the lock tractor 1 is intended for fixing to a gear housing. A second, designated 3 connecting part of the lock actuator 1 is, however, for fixing to a switching element of the transmission, namely on a shift fork or a fixed part connected to a shift fork part provided. Both connecting parts 2 . 3 have a U-shape, with the open sides of the U-shaped connecting parts 2 . 3 face each other so that the two connecting parts 2 . 3 together describe an incomplete, rectangular frame.
  • Inside the frame, which through the U-shaped connecting parts 2 . 3 is described, there is a toggle mechanism 4 including a magnetic actuator 5 , The toggle mechanism 4 is formed by a first lever arm 6 , which with the first connection part 2 coupled, and a second lever arm 7 , which with the second connection part 3 is coupled. During the first lever arm 6 - as well as the connecting ropes 2 . 3 - has a U-shape, describes the second lever arm 7 an H-shape. The lever arms 6 . 7 are through a middle joint 8th coupled together, which in the form of two separate individual joints 9 . 10 is present.
  • Unlike the first lever arm 6 the second lever arm protrudes 7 over the middle joint 8th out.
  • The first lever arm 6 is through a joint 11 with the first connection part 2 coupled; the second lever arm 7 is through a joint 12 with the second connection part 3 coupled. At the first joint 11 there is a return spring 13 , namely leg spring, which the toggle mechanism 4 towards the open state of the lock actuator 1 loaded. At the joint 11 it is a low backlash joint. In contrast to this is the joint 12 game-related, with a slot guide for this purpose 14 in the second connection part 3 is trained.
  • The magnetic actuator 5 works with a coil 15 , which concentric to the joint 11 is arranged and between the two U-legs of the first connection part 2 lies. A possible, by means of the coil 15 generated magnetic flux is in 2 indicated by a closed, arrowed line. The magnetic flux passes through contact surfaces, among other things 16 . 17 which the lever arm 6 or the lever arm 7 attributable to. Likewise, the magnetic flux passes through a central web 18 the lever arm 7 ,
  • The magnetic flux, which is in the lock actuator 1 results, inter alia, of the switching position of the lock tractor 1 , from the energization of the coil 15 , as well as the optional occupation of the contact surfaces 16 . 17 dependent on permanent magnets.
  • The 3 and 4 show in comparison the locked position ( 3 ) as well as the open position ( 4 ) of the lock tractor 1 , Also in the locked position is the toggle mechanism 4 not stretched out. The joints 8th . 11 . 12 never lie on a straight line. One between the contact surfaces 16 . 17 effective magnetic force is in 4 With F M , a locking force of the lock actuator 1 denoted by Fs. As a rule, the transition between the in the 3 and 4 sketched extreme positions of the lock tractor 1 by energizing the coil 15 of the magnetic actuator 5 and thus accomplished by targeted change of the magnetic flux. In individual cases, however, it may also be possible and useful, by manually initiated from outside, acting on the output side forces the switching state of the lock actuator 1 to change. The lock tractor 1 thus does not constitute a self-locking gear. By external forces, in particular forces in the direction of the blocking force fs , forced movements of the toggle mechanism 4 , including a lifting of the lever arm 7 from the lever arm 6 of the contact surfaces acting as abutment surfaces 16 . 17 falls, have a change in electrical quantities that the coil 15 relate to the result. By automatically tracking the corresponding measured values, in particular current and voltage values, a forced change in the switching state of the lock actuator is therefore always possible 1 detectable. In an analogous manner, also by the magnetic actuator 5 Switching operations caused Stellstellungen the lock actuator 1 supervised. By detecting electrical quantities is thus a displacement or angle sensor on the lock tractor 1 replaced.
  • In the view of FIG. 5, in addition to the lock actuator 1 a space designated 19 for a linkage of the transmission sketched. The lock tractor 1 is in its open position, as in 4 represented. Due to the H-shape of the second lever arm 7 can the toggle mechanism 4 partly on both sides of the room 19 Pan past this. Overall, the lock actuator 1 extremely space-saving integrated into a manual transmission of a motor vehicle. The orientations of the lock tractor 1 after the 1 to 5 contain no information about its actual installation position in the gearbox.
  • LIST OF REFERENCE NUMBERS
  • 1.
    Sperraktor
    Second
    first connection part
    Third
    second connection part
    4th
    Toggle mechanism
    5th
    magnetic actuator
    6th
    Lever arm, coupled with the first connection part
    7th
    Lever arm, coupled with second connection part
    8th.
    middle joint
    9th
    Single joint
    10th
    Single joint
    11th
    Joint (on the first connection part)
    12th
    Joint (on the second connector)
    13th
    Return spring
    14th
    Slot guide
    15th
    Kitchen sink
    16th
    Contact surface on the lever arm 6
    17th
    Contact surface on the lever arm 7
    18th
    center web
    19th
    Room for linkage
    F M
    magnetic force
    fs
    locking force

Claims (8)

  1. Locking mechanism for a transmission of a motor vehicle, having a first connection part (2), which is provided for connection to a transmission housing, and a second connection part (3), which is provided for cooperation with a switching element, wherein between the two connection parts (2,3 ) is connected to a variation of the distance between the connecting parts (2,3) formed toggle mechanism (4) and a magnetic actuator (5) in the toggle mechanism (4) is integrated, characterized in that a coil (15) of the magnetic actuator (5) concentric with a hinge (11,12) of the toggle mechanism (4) is arranged.
  2. Lock tractor after Claim 1 , characterized in that the toggle mechanism (4) comprises two lever arms (6,7), wherein one of the lever arms (6) with the first connector part (2) and the other lever arm (7) with the second connector part (3) is pivotally coupled and both lever arms (6, 7) are coupled to each other by a center joint (8), and one of the lever arms (7) projects beyond the center joint (8) towards the other lever arm (6) and projects therefrom over the center joint (8) Area cooperating with each other contact surfaces (16,17) of the two lever arms (6,7) are formed.
  3. Lock tractor after Claim 2 , characterized in that the contact surfaces (16,17) for transmitting magnetic forces between the lever arms (6,7) are provided.
  4. Lock tractor after Claim 2 or 3 , characterized in that the contact surfaces (16,17) are designed as a positive pressure of the toggle lever mechanism (4) preventing abutment surfaces.
  5. Locker after one of Claims 2 to 4 , characterized in that each connecting part (2,3) and at least one lever arm (6,7) of the toggle mechanism (4) has a U-shape.
  6. Lock tractor after Claim 5 , characterized in that one of the lever arms (7) has an H-shape, wherein the middle joint (8) in the form of two individual joints (9,10) in an open portion of the H-shaped lever arm (7) is arranged.
  7. Locker after one of Claims 1 to 6 , characterized in that one of the connecting parts (2) spring-loaded and the other connection part (3) play, in particular with a slot guide (14), with the toggle mechanism (4) is coupled.
  8. Using a lock tractor after Claim 1 in a an internal combustion engine and at least one electric motor acting as traction motor hybrid vehicle with manual transmission.
DE102016207731.7A 2016-05-04 2016-05-04 Locking actuator for a transmission of a motor vehicle Active DE102016207731B4 (en)

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Application Number Priority Date Filing Date Title
DE102016207731.7A DE102016207731B4 (en) 2016-05-04 2016-05-04 Locking actuator for a transmission of a motor vehicle

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Application Number Priority Date Filing Date Title
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DE102016207731B4 true DE102016207731B4 (en) 2018-06-07

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005057794A1 (en) 2005-12-03 2007-06-06 Deere & Company, Moline Device for actuating a parking brake
DE102007030405B3 (en) 2007-06-29 2008-10-09 Robert Bosch Gmbh Electromagnetic actuator with manual override for a valve
DE102007052261A1 (en) 2007-11-02 2009-05-07 Bayerische Motoren Werke Aktiengesellschaft Hybrid vehicle, has selecting element allowing driver to switch gear from gear ratio to other gear ratio, while carrying out switching procedures from former ratio to latter ratio by operation of selecting element
DE102011004063A1 (en) 2011-02-14 2012-08-16 Schaeffler Technologies Gmbh & Co. Kg Switchgear for motor vehicle change speed gear, has gearshift lever shaft rotating around its axial axis, where one or more actuating elements are provided for engaging and releasing individual gears
DE102011080498A1 (en) 2011-08-05 2013-02-07 Schaeffler Technologies AG & Co. KG parking lock
DE102013206851A1 (en) 2012-12-04 2014-06-05 Schaeffler Technologies Gmbh & Co. Kg Switching device of speed-change gearbox for vehicle e.g. motor car, has gear locking device that is set to block the laying of switched gears or laying of neutral position
DE102012224179A1 (en) 2012-12-21 2014-06-26 Olympus Winter & Ibe Gmbh Electromagnetic actuator for a surgical instrument
DE102013208768A1 (en) 2013-05-13 2014-11-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Electromagnetic actuator, actuatable movable system containing a plurality of such actuators and actuator movement method
DE102013213706A1 (en) 2013-07-12 2015-01-15 Schaeffler Technologies Gmbh & Co. Kg parking lock
DE102013213707A1 (en) 2013-07-12 2015-01-15 Schaeffler Technologies Gmbh & Co. Kg parking lock
EP2913563A1 (en) 2014-02-26 2015-09-02 Schaeffler Technologies GmbH & Co. KG Hybrid drive unit
DE102014219037A1 (en) 2014-09-22 2016-03-24 Zf Friedrichshafen Ag Parking lock device for a motor vehicle
DE102016202117A1 (en) 2015-03-11 2016-09-15 Schaeffler Technologies AG & Co. KG Hybrid drive unit

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005057794A1 (en) 2005-12-03 2007-06-06 Deere & Company, Moline Device for actuating a parking brake
DE102007030405B3 (en) 2007-06-29 2008-10-09 Robert Bosch Gmbh Electromagnetic actuator with manual override for a valve
DE102007052261A1 (en) 2007-11-02 2009-05-07 Bayerische Motoren Werke Aktiengesellschaft Hybrid vehicle, has selecting element allowing driver to switch gear from gear ratio to other gear ratio, while carrying out switching procedures from former ratio to latter ratio by operation of selecting element
DE102011004063A1 (en) 2011-02-14 2012-08-16 Schaeffler Technologies Gmbh & Co. Kg Switchgear for motor vehicle change speed gear, has gearshift lever shaft rotating around its axial axis, where one or more actuating elements are provided for engaging and releasing individual gears
DE102011080498A1 (en) 2011-08-05 2013-02-07 Schaeffler Technologies AG & Co. KG parking lock
DE102013206851A1 (en) 2012-12-04 2014-06-05 Schaeffler Technologies Gmbh & Co. Kg Switching device of speed-change gearbox for vehicle e.g. motor car, has gear locking device that is set to block the laying of switched gears or laying of neutral position
DE102012224179A1 (en) 2012-12-21 2014-06-26 Olympus Winter & Ibe Gmbh Electromagnetic actuator for a surgical instrument
DE102013208768A1 (en) 2013-05-13 2014-11-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Electromagnetic actuator, actuatable movable system containing a plurality of such actuators and actuator movement method
DE102013213706A1 (en) 2013-07-12 2015-01-15 Schaeffler Technologies Gmbh & Co. Kg parking lock
DE102013213707A1 (en) 2013-07-12 2015-01-15 Schaeffler Technologies Gmbh & Co. Kg parking lock
EP2913563A1 (en) 2014-02-26 2015-09-02 Schaeffler Technologies GmbH & Co. KG Hybrid drive unit
DE102014219037A1 (en) 2014-09-22 2016-03-24 Zf Friedrichshafen Ag Parking lock device for a motor vehicle
DE102016202117A1 (en) 2015-03-11 2016-09-15 Schaeffler Technologies AG & Co. KG Hybrid drive unit

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