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WO2024193694A1 - Motor vehicle latch, in particular a motor vehicle door latch - Google Patents

Motor vehicle latch, in particular a motor vehicle door latch Download PDF

Info

Publication number
WO2024193694A1
WO2024193694A1 PCT/CN2024/083304 CN2024083304W WO2024193694A1 WO 2024193694 A1 WO2024193694 A1 WO 2024193694A1 CN 2024083304 W CN2024083304 W CN 2024083304W WO 2024193694 A1 WO2024193694 A1 WO 2024193694A1
Authority
WO
WIPO (PCT)
Prior art keywords
lever
motor vehicle
blocking
catch
release
Prior art date
Application number
PCT/CN2024/083304
Other languages
French (fr)
Inventor
Ping Xu
Tobias Klocke
Liang Fang
Original Assignee
Kiekert Automotive (Changshu) Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kiekert Automotive (Changshu) Co., Ltd. filed Critical Kiekert Automotive (Changshu) Co., Ltd.
Publication of WO2024193694A1 publication Critical patent/WO2024193694A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/12—Power-actuated vehicle locks characterised by the function or purpose of the powered actuators
    • E05B81/14—Power-actuated vehicle locks characterised by the function or purpose of the powered actuators operating on bolt detents, e.g. for unlatching the bolt
    • E05B81/15—Power-actuated vehicle locks characterised by the function or purpose of the powered actuators operating on bolt detents, e.g. for unlatching the bolt with means preventing the detent to return to its latching position before the bolt has moved to the unlatched position
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/02—Power-actuated vehicle locks characterised by the type of actuators used
    • E05B81/04—Electrical
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B77/00—Vehicle locks characterised by special functions or purposes
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/02—Power-actuated vehicle locks characterised by the type of actuators used
    • E05B81/04—Electrical
    • E05B81/06—Electrical using rotary motors

Definitions

  • the invention relates to a motor vehicle latch, in particular a motor vehicle door latch, with an electromotive opening drive for a locking mechanism consisting substantially of a catch and pawl, with a drive wheel of the electromotive drive working on a release lever to open the locking mechanism.
  • Electromotive opening drives for locking mechanisms of motor vehicle latches and in particular motor vehicle door latches are enjoying increasing popularity and growing interest. This can substantially be attributed to the fact that the opening process of the motor vehicle latch takes place almost effortlessly and noiselessly. On the part of an operator wishing to gain access, it is only necessary to ensure that the motor vehicle latch is unlocked beforehand.
  • a wing of the motor vehicle door in question it is also possible for a wing of the motor vehicle door in question to be swung open using a separate electromotive opening drive.
  • the pivoting is done manually by the operator or user.
  • the motor vehicle door in question does not even have to be equipped with an outside door handle, because the gap that occurs between the motor vehicle door and the motor vehicle body following the opening of the motor vehicle latch allows the user to reach behind the wing of the motor vehicle door in question and in this way, swing open the motor vehicle door in question. This has proven successful in principle.
  • DE 10 2006 032 033 A1 concerns a catch lock that is equipped with a motorized drive, with the aid of which a release lever is acted upon.
  • a type of blocking lever is assigned to the release lever.
  • EP 2 893 108 B1 a triggering element with an additional retaining element is implemented. During an opening movement of a catch, the retaining element holds the triggering element in an inactive position with respect to the associated locking mechanism.
  • An electromotive opening drive is not expressly described.
  • the invention is based on the technical problem of further developing a motor vehicle latch and in particular a motor vehicle door latch of the embodiment described above in such a way that safe door opening is guaranteed even under extreme environmental conditions and indifferent functional states are avoided.
  • a generic motor vehicle latch and in particular a motor vehicle door latch is characterized within the scope of the invention in that a blocking lever assigned to the release lever is provided, which blocking lever is transferred from a blocking position for the release lever to a release position for the release lever by the opening catch.
  • the invention is initially based on the knowledge that the electromotive opening drive works via the drive wheel on the release lever.
  • the release lever is moved to its release position with the aid of the drive wheel. In this release position, the release lever ensures that the pawl is properly lifted from its latching engagement with the catch.
  • the release position of the release lever corresponds to the blocking lever assuming its blocking position.
  • the triggering position of the triggering lever is defined and fixed according to the invention by the blocking lever moving into its blocking position with respect to the triggering lever, so that the triggering lever cannot move any further beyond the triggering position.
  • the pawl is lifted from its latching engagement with the catch, as described.
  • the catch opens with the aid of a spring or as a result of the counteracting forces built up by the rubber door seal.
  • the release lever remains in its release position because the blocking lever also maintains its blocking position. As a result, the release lever cannot be transferred to its basic position, from which a further and renewed electromotive opening process can be initiated with the aid of the electromotive opening drive.
  • the fact that the release lever remains in its release position ensures that the pawl is still lifted off the catch and cannot fall into the catch (e.g. in the pre-ratchet) .
  • a user can try to open the motor vehicle door or its wing manually or to support the (lack of) door rubber sealing forces.
  • Such efforts or an additional manual opening process are expressly not impeded by the pawl accidentally falling in again, for example, because the release lever maintains its release position and the pawl is lifted off the catch in this release position. This is ensured by the blocking lever, which is still in its blocking position.
  • the opening catch ensure that the blocking lever is transferred from the blocking position with respect to the release lever to the release position for the release lever.
  • the release lever In the release position for the release lever, the release lever can move from the previously assumed release position into the basic position, so that the pawl is then not (no longer) lifted off the catch and can fall into the catch again. Consequently, the release lever moves into its basic position and the blocking lever assumes its release position, so that the electromotive opening drive is then ready for a renewed and subsequent electromotive opening process.
  • this presupposes that the locking mechanism is first closed (again) . All that is required for this is that the locking bolt moves into the locking mechanism and ensures latching, which is possible as a result of the basic position assumed.
  • the vehicle user can be informed of the incomplete opening of the locking mechanism, for example via a sensor.
  • the sensor can check the blocking lever, in particular as to whether it has moved from the blocking position into the release position with respect to the release lever. This may also be done via a catch sensor which is present anyway and which detects the (completely) open state of the catch.
  • the blocking lever is controlled from the blocking position to the release position using a transmission lever that interacts with the catch. That is, the catch ensures mechanically through the transmission lever that the blocking lever is transferred from the blocking position to the release position.
  • the assumption of the blocking position on the part of the blocking lever usually takes place by the force of a spring to be described in more detail below, i.e. spring-assisted.
  • the transmission lever is usually designed as a two-armed lever comprising a catch arm and a blocking lever arm.
  • the rotary latch arm interacts with the catch.
  • the catch can be equipped with a stop or a contour which interacts with the transmission lever.
  • the blocking lever arm in turn ensures the blocking position with respect to the release lever. In this blocking position, the release lever is blocked during an electromotive opening process, so that the release lever no longer moves beyond the release position reached in this position.
  • the blocking lever ensures that the release lever is held in the release position until the blocking lever assumes the release position.
  • a particularly compact embodiment is characterized in that the transmission lever and the blocking lever are each rotatably mounted about axes running at an angle and in particular at right angles to one another.
  • the blocking lever and the release lever are largely arranged at the same level or coplanar to one another.
  • the invention also recommends a predominantly coplanar arrangement for the transmission lever and the catch.
  • the blocking lever and/or the transmission lever are/is biased with the aid of a spring in the direction of the blocking position of the blocking lever.
  • the procedure is usually such that the transmission lever is equipped with the spring.
  • the spring is generally designed as a spiral spring and may enclose a bearing pin as a component of the transmission lever.
  • Fig. 1 to 3 show the motor vehicle latch according to the invention in different functional states.
  • the drawings show a motor vehicle latch, which is not limited to a motor vehicle door latch.
  • the motor vehicle latch or motor vehicle door latch is first of all equipped with a locking mechanism 1, 2, which is only indicated in Fig. 1.
  • the locking mechanism 1, 2 consists of a catch 1 and a pawl 2.
  • a release lever 3 acts on the pawl 2 in order to lift the pawl 2 from its latching engagement with the catch 1 when the locking mechanism 1, 2 is in the closed state. This assumes that the release lever 3 performs a pivoting movement about its axis 4 in the clockwise direction.
  • the pivoting movement of the release lever 3 in the clockwise direction about the axis 4, which is consequently required for an opening process, is brought about according to the embodiment by a merely indicated electromotive opening drive 5, 6, as is only shown in Fig. 1.
  • the electromotive opening drive 5, 6 comprises an electric motor 5 and a drive wheel 6 as the primary and mainly illustrated drive wheel 6 and a component of the electromotive drive 5, 6.
  • the electric motor drive 5, 6 may also comprise a gear, which is not shown in detail.
  • Fig. 1 shows that the movement of the release lever 3 into the release position shown in Fig. 1 takes place and can also take place.
  • This release movement of the release lever 3 is permitted by the blocking lever 7, which is in its release position shown in Fig. 1. That is, the release position of the blocking lever 7 is required so that the release lever 3 can reach its release position indicated in Fig. 1 or transition into said release position, in order to ultimately lift the pawl 2 from its latching engagement with the catch 1.
  • the transmission lever 9 interacts with the transmission lever 9.
  • the transmission lever 9 according to the embodiment is designed as a two-armed lever and comprises a catch arm 9a and a blocking lever arm 9b. Furthermore, the transmission lever 9 is then also equipped with a bearing pin 9c, which helically surrounds a spring 8 designed as a spiral spring. With the aid of the spring 8, the blocking lever 7 is biased in the direction of its blocking position, as shown in Fig. 2.
  • the transmission lever 9 or its catch arm 9a can interact with a contour 1a on the catch 1. It can be seen that the transmission lever 9 and the blocking lever 7 are rotatably mounted about axes that are angled and, in particular, perpendicular to one another. In addition, the embodiment makes it clear that the blocking lever 7 and the release lever 3 are largely arranged at the same level as one another.
  • the transmission lever 9 and the catch 1 are also arranged largely parallel to one another, so that the contour 1a of the catch 1, which opens counterclockwise about its axis as shown in Fig. 3, can interact with the catch arm 9a and thus the transmission lever 9 during its opening process.
  • the release lever 3 and the drive wheel 6 are also arranged largely parallel to one another.
  • the drive wheel 6, the release lever 3 and also the blocking lever 7 are located overall in mutually parallel planes.
  • the catch 1 and also the transmission lever 9 are oriented perpendicular thereto.
  • Fig. 1 shows the locking mechanism 1, 2 in the closed state.
  • the electric motor 5 ensures that the drive wheel 6 performs a clockwise movement indicated in Fig. 1.
  • the release lever 3 is increasingly pivoted about its axis 4, beginning in its basic position, also in the clockwise direction indicated in Fig. 1.
  • the movement of the release lever 3 is permitted by the blocking lever 7, which assumes its release position for this purpose, and consequently does not impede the release lever 3 in its basic position during its pivoting movement about the axis 4 in a clockwise direction.
  • the release lever 3 can pivot the pawl 2 counterclockwise about its axis, as is also indicated in Fig. 1. In this way, the pawl 2 is removed from the catch 1 and the latching engagement of the pawl 2 in the catch 1 is released so that the catch 1 can then open with the aid of a spring.
  • the progressive movement of the release lever 3 about its axis 4 in the clockwise direction during the transition from Fig. 1 to Fig. 2 causes the blocking lever 7 to move in the direction of its blocking position shown in Fig. 2 with the aid of the spring 8 on the transmission lever 9. This is indicated by an arrow in Fig. 2, which indicates the associated pivoting movement of the blocking lever 7 about its axis in the clockwise direction.
  • the blocking position of the blocking lever 7 as shown in Fig. 2 corresponds to the release lever 3 having reached its release position.
  • the blocking lever 7 now ensures that the release lever 3 can pivot beyond the release position or cannot pivot back past the release position (counterclockwise about its axis 4) , but rather is blocked in the release position according to Fig. 2. This is correlated with the fact that the pawl 2 is lifted from its engagement with the catch 1.
  • the catch 1 opens, which in the embodiment corresponds to a pivoting movement of the catch 1 in the counterclockwise direction indicated in Fig. 3, the catch 1 moves with its contour 1a against the catch arm 9a of the transmission lever 9.
  • the transmission lever 9 is pivoted clockwise about its axis during the transition from Fig. 2 to Fig. 3, so that the transmission lever 9 is spaced apart from the blocking lever 7 with its blocking lever arm 9B against the force of the spring 8.
  • the blocking lever 7 moves from its blocking position shown in Fig. 2 into the release position shown in Fig. 3, as is also shown in Fig. 1. This corresponds to a pivoting movement of the blocking lever 7 about its axis in the counterclockwise direction indicated in Fig. 3.

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  • Lock And Its Accessories (AREA)

Abstract

The invention relates to a motor vehicle latch, and in particular a motor vehicle door latch, which is equipped with an electromotive opening drive (5, 6) for a locking mechanism (1, 2) consisting substantially of a catch (1) and a pawl (2). In addition, a drive wheel (6) of the electromotive drive (5, 6) works on a release lever (3) to open the locking mechanism (1, 2). According to the invention, a blocking lever (7) assigned to the release lever (3) is provided, which blocking lever (7) is transferred from a blocking position to a release position for the release lever (3) by the opening catch (1).

Description

Motor vehicle latch, in particular a motor vehicle door latch
The invention relates to a motor vehicle latch, in particular a motor vehicle door latch, with an electromotive opening drive for a locking mechanism consisting substantially of a catch and pawl, with a drive wheel of the electromotive drive working on a release lever to open the locking mechanism.
Electromotive opening drives for locking mechanisms of motor vehicle latches and in particular motor vehicle door latches are enjoying increasing popularity and growing interest. This can substantially be attributed to the fact that the opening process of the motor vehicle latch takes place almost effortlessly and noiselessly. On the part of an operator wishing to gain access, it is only necessary to ensure that the motor vehicle latch is unlocked beforehand.
This can take place via a question/answer dialogue between an operator-side transponder and the motor vehicle or via a remote control. As soon as the relevant motor vehicle latch is unlocked, the electromotive opening drive can ensure that the locking mechanism is opened and consequently the catch releases a previously caught locking bolt and thus the motor vehicle door. As a result, the motor vehicle door is (slightly) opened.
Separate opening devices or a so-called opener can provide for this. In general, the opening process of the motor vehicle door takes place after the electric motor has been opened with the aid of the electromotive opening drive by the surrounding rubber door seals. These have previously been compressed when the motor vehicle door is closed and can now relax after the motor vehicle latch has been opened. As a result of this, the motor vehicle door in question is opened at least partially and can then be swung open by the operator or user.
However, it is also possible for a wing of the motor vehicle door in question to be swung open using a separate electromotive opening drive. In general, however, the pivoting is done manually by the operator or user. For this purpose, the motor vehicle door in question does not even have to be equipped with an outside door handle, because the gap that occurs between the motor vehicle door and the motor vehicle body following the opening of the motor vehicle latch allows the user to reach behind the wing of the motor vehicle door in question and in this way, swing open the motor vehicle door in question. This has proven successful in principle.
DE 10 2006 032 033 A1 concerns a catch lock that is equipped with a motorized drive, with the aid of which a release lever is acted upon. A type of blocking lever is assigned to the release lever.
In EP 2 893 108 B1, a triggering element with an additional retaining element is implemented. During an opening movement of a catch, the retaining element holds the triggering element in an inactive position with respect to the associated locking mechanism. An electromotive opening drive is not expressly described.
The closest state of the art according to DE 10 2017 002 045 B5 works with an electromotive opening drive, which works via a drive unit on an actuating lever or release lever. In this way, a pawl can be lifted from its engagement with a catch via an intermediate lever or a so-called retaining element.
The state of the art has proven successful in principle when it comes to providing electromotive opening drives per se. However, problems arise in practice in the event that, particularly at low temperatures, the door rubber seals do not or only inadequately provide the described partial opening of the wing of the motor vehicle door due to their resulting and almost non-existent elasticity. This can then correspond to the fact that not only can the motor vehicle door in question not be opened at all by the user wishing to gain access in the extreme case, but there may also be indifferent functional states as a result, because the catch of the locking mechanism does not open completely, so that the electromotive opening drive does not or cannot fully return to its initial  position after the electromotive opening process.
It is also conceivable that, due to the catch not being opened or not being fully opened, snagging between the catch and the release lever or the pawl and thus the electromotive opening drive may be observed. The invention as a whole seeks to remedy this.
The invention is based on the technical problem of further developing a motor vehicle latch and in particular a motor vehicle door latch of the embodiment described above in such a way that safe door opening is guaranteed even under extreme environmental conditions and indifferent functional states are avoided.
To solve this technical problem, a generic motor vehicle latch and in particular a motor vehicle door latch is characterized within the scope of the invention in that a blocking lever assigned to the release lever is provided, which blocking lever is transferred from a blocking position for the release lever to a release position for the release lever by the opening catch.
In contrast to the state of the art, indifferent functional states can therefore no longer occur and, in particular, situations can be mastered in which the catch does not open or does not open completely due to insufficient counteracting forces of the rubber door seal. Here, the invention is initially based on the knowledge that the electromotive opening drive works via the drive wheel on the release lever. The release lever is moved to its release position with the aid of the drive wheel. In this release position, the release lever ensures that the pawl is properly lifted from its latching engagement with the catch. At the same time, the release position of the release lever corresponds to the blocking lever assuming its blocking position.
That is, the triggering position of the triggering lever is defined and fixed according to the invention by the blocking lever moving into its blocking position with respect to the triggering lever, so that the triggering lever cannot move any further beyond the triggering position. In this release position, the pawl is lifted from its latching  engagement with the catch, as described. As a result, the catch opens with the aid of a spring or as a result of the counteracting forces built up by the rubber door seal.
If this opening process of the catch is not or not fully completed, the release lever remains in its release position because the blocking lever also maintains its blocking position. As a result, the release lever cannot be transferred to its basic position, from which a further and renewed electromotive opening process can be initiated with the aid of the electromotive opening drive.
At the same time, the fact that the release lever remains in its release position ensures that the pawl is still lifted off the catch and cannot fall into the catch (e.g. in the pre-ratchet) . As a result, a user can try to open the motor vehicle door or its wing manually or to support the (lack of) door rubber sealing forces. Such efforts or an additional manual opening process are expressly not impeded by the pawl accidentally falling in again, for example, because the release lever maintains its release position and the pawl is lifted off the catch in this release position. This is ensured by the blocking lever, which is still in its blocking position.
Only when the catch opens or reaches its fully open position does the opening catch ensure that the blocking lever is transferred from the blocking position with respect to the release lever to the release position for the release lever. In the release position for the release lever, the release lever can move from the previously assumed release position into the basic position, so that the pawl is then not (no longer) lifted off the catch and can fall into the catch again. Consequently, the release lever moves into its basic position and the blocking lever assumes its release position, so that the electromotive opening drive is then ready for a renewed and subsequent electromotive opening process. However, this presupposes that the locking mechanism is first closed (again) . All that is required for this is that the locking bolt moves into the locking mechanism and ensures latching, which is possible as a result of the basic position assumed.
Accordingly, not only can indifferent functional states be prevented, but it is also ensured overall that the pawl cannot accidentally fall into the not yet fully opened catch and thus impede the opening process. In addition, this makes it possible for the vehicle user to be informed of the incomplete opening of the locking mechanism, for example via a sensor. For this purpose, the sensor can check the blocking lever, in particular as to whether it has moved from the blocking position into the release position with respect to the release lever. This may also be done via a catch sensor which is present anyway and which detects the (completely) open state of the catch. Herein lie the essential advantages.
According to an advantageous embodiment, the blocking lever is controlled from the blocking position to the release position using a transmission lever that interacts with the catch. That is, the catch ensures mechanically through the transmission lever that the blocking lever is transferred from the blocking position to the release position. The assumption of the blocking position on the part of the blocking lever usually takes place by the force of a spring to be described in more detail below, i.e. spring-assisted.
Furthermore, the transmission lever is usually designed as a two-armed lever comprising a catch arm and a blocking lever arm. The rotary latch arm interacts with the catch. For this purpose, the catch can be equipped with a stop or a contour which interacts with the transmission lever. The blocking lever arm in turn ensures the blocking position with respect to the release lever. In this blocking position, the release lever is blocked during an electromotive opening process, so that the release lever no longer moves beyond the release position reached in this position. In addition, the blocking lever ensures that the release lever is held in the release position until the blocking lever assumes the release position.
A particularly compact embodiment is characterized in that the transmission lever and the blocking lever are each rotatably mounted about axes running at an angle and in particular at right angles to one another. The blocking lever and the release lever are largely arranged at the same level or coplanar to one another. The invention also recommends a predominantly coplanar arrangement for the transmission lever and  the catch.
As already explained above, the blocking lever and/or the transmission lever are/is biased with the aid of a spring in the direction of the blocking position of the blocking lever. The procedure is usually such that the transmission lever is equipped with the spring. For this purpose, the spring is generally designed as a spiral spring and may enclose a bearing pin as a component of the transmission lever. Finally, it has proven to be particularly favorable if the release lever and the drive wheel are largely arranged on the same level or coplanar with one another.
In this way, a particularly compact structure is made available because the largely level arrangement of the release lever and the drive wheel allows a nested, so to speak, and thus small construction. The fact that the blocking lever is also arranged in or parallel to this plane also contributes to this. In contrast, the catch and the transmission lever controlled by the catch extend predominantly in a plane perpendicular thereto. Either way, a compact structure is observed, which also allows low-friction mechanical operation, so that any malfunctions or the assumption of the previously described indifferent functional states can be ruled out from the outset and mechanically. Herein lie the essential advantages.
The invention is explained in greater detail below with reference to drawings which show only one exemplary embodiment. In the drawings:
Fig. 1 to 3 show the motor vehicle latch according to the invention in different functional states.
The drawings show a motor vehicle latch, which is not limited to a motor vehicle door latch. For this purpose, the motor vehicle latch or motor vehicle door latch is first of all equipped with a locking mechanism 1, 2, which is only indicated in Fig. 1. For this purpose, the locking mechanism 1, 2 consists of a catch 1 and a pawl 2.
A release lever 3 acts on the pawl 2 in order to lift the pawl 2 from its latching engagement with the catch 1 when the locking mechanism 1, 2 is in the closed state. This assumes that the release lever 3 performs a pivoting movement about its axis 4 in the clockwise direction. The pivoting movement of the release lever 3 in the clockwise direction about the axis 4, which is consequently required for an opening process, is brought about according to the embodiment by a merely indicated electromotive opening drive 5, 6, as is only shown in Fig. 1.
For this purpose, the electromotive opening drive 5, 6 comprises an electric motor 5 and a drive wheel 6 as the primary and mainly illustrated drive wheel 6 and a component of the electromotive drive 5, 6. In principle, the electric motor drive 5, 6 may also comprise a gear, which is not shown in detail.
In any case, movements of the drive wheel 6 about its axis, which are indicated in Fig. 1 and initiated by the electric motor 5, in the clockwise direction indicated here, result in the release lever 3 also completing a clockwise movement about its axis 4 as a result. The clockwise movement of the release lever 3 about the axis 4 ensures that the pawl 2 is lifted from its engagement with the catch 1. This corresponds to a pivoting movement, indicated in Fig. 1, of the pawl 2 about its axis in the counterclockwise direction.
Fig. 1 shows that the movement of the release lever 3 into the release position shown in Fig. 1 takes place and can also take place. This release movement of the release lever 3 is permitted by the blocking lever 7, which is in its release position shown in Fig. 1. That is, the release position of the blocking lever 7 is required so that the release lever 3 can reach its release position indicated in Fig. 1 or transition into said release position, in order to ultimately lift the pawl 2 from its latching engagement with the catch 1.
The overall design is such that the blocking lever 7 interacts with the transmission lever 9. For this purpose, the transmission lever 9 according to the embodiment is designed as a two-armed lever and comprises a catch arm 9a and a blocking lever  arm 9b. Furthermore, the transmission lever 9 is then also equipped with a bearing pin 9c, which helically surrounds a spring 8 designed as a spiral spring. With the aid of the spring 8, the blocking lever 7 is biased in the direction of its blocking position, as shown in Fig. 2.
The transmission lever 9 or its catch arm 9a can interact with a contour 1a on the catch 1. It can be seen that the transmission lever 9 and the blocking lever 7 are rotatably mounted about axes that are angled and, in particular, perpendicular to one another. In addition, the embodiment makes it clear that the blocking lever 7 and the release lever 3 are largely arranged at the same level as one another.
The transmission lever 9 and the catch 1 are also arranged largely parallel to one another, so that the contour 1a of the catch 1, which opens counterclockwise about its axis as shown in Fig. 3, can interact with the catch arm 9a and thus the transmission lever 9 during its opening process. The release lever 3 and the drive wheel 6 are also arranged largely parallel to one another.
That is, the drive wheel 6, the release lever 3 and also the blocking lever 7 are located overall in mutually parallel planes. In contrast, the catch 1 and also the transmission lever 9 are oriented perpendicular thereto. As a result, operation that is both compact and low-friction is made available.
The mode of operation is as follows. Fig. 1 shows the locking mechanism 1, 2 in the closed state. In order to open said locking mechanism 1, 2, the electric motor 5 ensures that the drive wheel 6 performs a clockwise movement indicated in Fig. 1. With the aid of the drive wheel 6, the release lever 3 is increasingly pivoted about its axis 4, beginning in its basic position, also in the clockwise direction indicated in Fig. 1.
The movement of the release lever 3 is permitted by the blocking lever 7, which assumes its release position for this purpose, and consequently does not impede the release lever 3 in its basic position during its pivoting movement about the axis 4 in a  clockwise direction. As a result, the release lever 3 can pivot the pawl 2 counterclockwise about its axis, as is also indicated in Fig. 1. In this way, the pawl 2 is removed from the catch 1 and the latching engagement of the pawl 2 in the catch 1 is released so that the catch 1 can then open with the aid of a spring.
The progressive movement of the release lever 3 about its axis 4 in the clockwise direction during the transition from Fig. 1 to Fig. 2 causes the blocking lever 7 to move in the direction of its blocking position shown in Fig. 2 with the aid of the spring 8 on the transmission lever 9. This is indicated by an arrow in Fig. 2, which indicates the associated pivoting movement of the blocking lever 7 about its axis in the clockwise direction. The blocking position of the blocking lever 7 as shown in Fig. 2 corresponds to the release lever 3 having reached its release position. The blocking lever 7 now ensures that the release lever 3 can pivot beyond the release position or cannot pivot back past the release position (counterclockwise about its axis 4) , but rather is blocked in the release position according to Fig. 2. This is correlated with the fact that the pawl 2 is lifted from its engagement with the catch 1.
As soon as the catch 1 opens, which in the embodiment corresponds to a pivoting movement of the catch 1 in the counterclockwise direction indicated in Fig. 3, the catch 1 moves with its contour 1a against the catch arm 9a of the transmission lever 9. As a result, the transmission lever 9 is pivoted clockwise about its axis during the transition from Fig. 2 to Fig. 3, so that the transmission lever 9 is spaced apart from the blocking lever 7 with its blocking lever arm 9B against the force of the spring 8. As a result of this, the blocking lever 7 moves from its blocking position shown in Fig. 2 into the release position shown in Fig. 3, as is also shown in Fig. 1. This corresponds to a pivoting movement of the blocking lever 7 about its axis in the counterclockwise direction indicated in Fig. 3.
Now the motor vehicle latch or the release lever 3 has again reached its basic position according to Fig. 1. The blocking lever 7 is in its release position. As a result, starting from here, a renewed electromotive opening process can be carried out.
List of reference signs
Locking mechanism 1, 2
Catch 1
Contour 1a
Pawl 2
Release lever 3
Contour 3a
Axis 4
Opening drive 5, 6
Electric motor 5
Drive wheel 6
Blocking lever 7
Mating contour 7a
Spring 8
Transmission lever 9
Catch arm 9a
Blocking lever arm 9b
Bearing pin 9c

Claims (10)

  1. Motor vehicle latch, in particular a motor vehicle door latch, with an electromotive opening drive (5, 6) for a locking mechanism (1, 2) consisting substantially of a catch (1) and pawl (2) , with a drive wheel (6) of the electromotive drive (5, 6) working on a release lever (3) to open the locking mechanism (1, 2) , characterized in that
    a blocking lever (7) assigned to the release lever (3) is provided, which blocking lever (7) is transferred from a blocking position to a release position for the release lever (3) by the opening catch (1) .
  2. Motor vehicle latch according to claim 1, characterized in that the blocking lever (7) is controlled from the blocking position to the release position with the aid of a transmission lever (9) that interacts with the catch (1) .
  3. Motor vehicle latch according to claim 2, characterized in that the transmission lever (9) is designed as a two-armed lever with a catch arm (9a) and a blocking lever arm (9b) .
  4. Motor vehicle latch according to either claim 2 or claim 3, characterized in that the transmission lever (9) interacts with a contour (1a) on the catch (1) .
  5. Motor vehicle latch according to any of claims 2 to 4, characterized in that the transmission lever (9) and the blocking lever (7) are each rotatably mounted about axes running at an angle, in particular at right angles, to one another.
  6. Motor vehicle latch according to any of claims 1 to 5, characterized in that the blocking lever (7) and the release lever (3) are largely arranged on the same level as one another.
  7. Motor vehicle latch according to any of claims 2 to 6, characterized in that the transmission lever (9) and the catch (1) are arranged largely coplanar with one another.
  8. Motor vehicle latch according to any of claims 2 to 7, characterized in that the blocking lever (7) and/or the transmission lever (9) are biased with the aid of a spring (8) in the direction of the blocking position of the blocking lever (7) .
  9. Motor vehicle latch according to claim 8, characterized in that the transmission lever (9) is equipped with the spring (8) , which is designed as a spiral spring and engages around a bearing pin (9c) .
  10. Motor vehicle latch according to any of claims 1 to 9, characterized in that the release lever (3) and the drive wheel (5) are arranged predominantly coplanar with one another.
PCT/CN2024/083304 2023-03-23 2024-03-22 Motor vehicle latch, in particular a motor vehicle door latch WO2024193694A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050040658A1 (en) * 2001-12-12 2005-02-24 Larsen Christopher L. Snow load lever with two part pawl lever construction
DE102006032033A1 (en) 2005-07-09 2007-03-29 Witte-Velbert Gmbh & Co. Kg Rotary catch fastener for boot flap of e.g. passenger car, has storage unit with supporting section attached to trigger, where section comes in front of storage level of rotary catch to attain storage condition, when trigger is activated
DE102007060915A1 (en) * 2007-12-14 2009-06-18 Kiekert Ag Closing device for electromotive operable lock of motor vehicle, has rotary latch, pawl, release lever, actuating cam disk, end position safety unit, and releasing unit
EP2893108B1 (en) 2012-09-07 2018-04-25 Kiekert Aktiengesellschaft Motor vehicle door lock
DE102017002045A1 (en) 2017-03-02 2018-09-06 Audi Ag Bicycle lock
DE102017124519A1 (en) * 2017-10-20 2019-04-25 Kiekert Ag Motor vehicle door lock
DE102017124528A1 (en) * 2017-10-20 2019-04-25 Kiekert Ag Motor vehicle door lock

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050040658A1 (en) * 2001-12-12 2005-02-24 Larsen Christopher L. Snow load lever with two part pawl lever construction
DE102006032033A1 (en) 2005-07-09 2007-03-29 Witte-Velbert Gmbh & Co. Kg Rotary catch fastener for boot flap of e.g. passenger car, has storage unit with supporting section attached to trigger, where section comes in front of storage level of rotary catch to attain storage condition, when trigger is activated
DE102007060915A1 (en) * 2007-12-14 2009-06-18 Kiekert Ag Closing device for electromotive operable lock of motor vehicle, has rotary latch, pawl, release lever, actuating cam disk, end position safety unit, and releasing unit
EP2893108B1 (en) 2012-09-07 2018-04-25 Kiekert Aktiengesellschaft Motor vehicle door lock
DE102017002045A1 (en) 2017-03-02 2018-09-06 Audi Ag Bicycle lock
DE102017124519A1 (en) * 2017-10-20 2019-04-25 Kiekert Ag Motor vehicle door lock
DE102017124528A1 (en) * 2017-10-20 2019-04-25 Kiekert Ag Motor vehicle door lock

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