Closing aid for a motor vehicle lock and motor vehicle lock with closing aid

Abstract

The invention relates to a closing aid (2) for a motor vehicle lock (1), comprising: a locking mechanism (3) having a rotary latch (11, 11') and at least one locking pawl (12), wherein the rotary latch (11, 11') can be latched in a preliminary latching position and a main latching position by means of the locking pawl (12); and an electrically actuatable drive pawl (6), wherein the rotary latch (11, 11') can be moved from a preliminary latching position into a main latching position by means of the drive pawl (6) and at least part of the drive pawl (6) can be guided by means of the control contour (17), the drive pawl (6) being articulatable.

Description

[0001] Description

[0002] Pulling aid for a motor vehicle lock and motor vehicle lock with pulling aid

[0003] The invention relates to a pulling aid for a motor vehicle lock and to a motor vehicle lock with a pulling aid comprising a locking mechanism with a rotary latch and at least one pawl, wherein the rotary latch can be locked in a pre-latching and a main latching position by means of the pawl, an electrically actuated, movable drive pawl, wherein the rotary latch can be moved from a pre-latching position to a main latching position by means of the drive pawl and the drive pawl can be guided at least partially by means of a control cam.

[0004] The demands placed on modern motor vehicles, and especially the demands on user comfort, are constantly increasing. One goal of the automotive industry is to make closing movable components on the vehicle, such as hatches or doors, as easy as possible for the operator. The functionality and features of the vehicle's locking mechanism play a crucial role in this.

[0005] The automotive locks according to the invention contain a locking mechanism. A locking mechanism consists of a rotary latch and a pawl, which, in conjunction with a lock holder (usually fixed in place), can be moved into a latched position. Consequently, if an open locking mechanism is moved relative to a lock holder, the rotary latch moves into a closing position and is finally locked in a closed or latching position by means of the pawl. Locks are available with one or two latching positions, i.e., a pre-latching position and a main latching position, and there are locking mechanisms equipped with one, two, or more pawls to achieve one or two latching positions within the locking mechanism. The locking behavior is generally differentiated into manual and electrically assisted operation.

[0006] The rotary latch and pawl form the locking mechanism. For example, when an open side door of a motor vehicle is closed, a catch arm of the rotary latch, as part of the rotary latch's engagement jaw, first engages with the lock holder, which is attached, for example, to a B-pillar of the motor vehicle. The relative movement of the door to the lock holder pivots the rotary latch, causing a spring-loaded pawl with, for example, a detent on the rotary latch to engage. When the detent is reached, only a slight preload is applied to the rotary latch.

[0007] When the door is fully closed, two different mechanisms can be used. Firstly, the door can be closed manually by moving the door leaf beyond the pre-latch position into a closed position, closing the door against a door seal. This movement is sufficient to pivot the rotary latch far enough for the locking pawl to engage in the main latch position. The contact areas between the locking pawl and the rotary latch in the latch positions are usually made of metal, which can result in a metallic noise. A buffer on the rotary latch, and in particular a buffer formed by a plastic casing on the rotary latch, can reduce this noise.

[0008] Alternatively, the locking mechanism can be moved from the pre-lock position to the main lock position using a pulling aid. For this purpose, a mechanism, in particular a lever mechanism, engages the rotary latch and moves it from the main lock position into an overtravel position, allowing the pawl to engage. After reaching the overtravel position and engaging the rotary latch, the electrically operated pulling aid is deactivated, so that the pawl engages with the main lock of the rotary latch.

[0009] When the vehicle lock is unlocked electrically or manually, meaning the locking pawl is moved out of the engagement area with the rotary latch, high forces are exerted on the rotary latch. The force acting on the locking pawl from the rotary latch results, on the one hand, from a rotary latch spring, which is spring-loaded in the opening direction, and on the other hand, from the force acting on the rotary latch from the vehicle door seal. The force from the door seal is significantly greater than the force from the rotary latch spring. When the locking pawl is moved out of the engagement area with the rotary latch, which is usually done using a release lever, a snapping noise occurs precisely at the moment the locking pawl leaves the rotary latch. It can also happen that the closing process is interrupted, namely if the door lock is reopened while closing.To enable simple and easy electric or manual opening of the lock, a detent element was incorporated into the engagement area between the rotary latch and the pawl, as described in EP 3 870 786 B1. The detent element is pivotally mounted in the rotary latch, with both the detent element and the pawl being concentric to their respective bearing points within their engagement area, thus allowing a rolling motion between the detent element and the pawl. This design of the lock enables easy and simple opening with minimal force. When the lock is opened, the detent element pivots sufficiently to generate an opening moment within the lock, resulting in its automatic opening.An opening moment in the engagement area with the rotary latch leads to a situation where, when the blockage of the pawl is lifted, an independent opening occurs in the locking mechanism.

[0010] A closing aid for a lock of the type mentioned above is known from publication WO 2010 / 142280 Al. The closing aid comprises a drive unit that moves the rotary latch from the pre-latch position to the fully latched position by motor power, thus fully closing an associated door or flap. The drive unit includes a closing latch, called a pull bar, which is movable by the motor. During closing, the closing latch rests against a bolt of the rotary latch, so that the rotary latch can be rotated from the pre-latch position to the fully latched position by motorized movement of the closing latch. The closing latch is then moved back to its initial position. Once the closing latch has reached its initial position, the lock can be opened again.

[0011] Moving the locking latch back to its initial position takes time. During this time, the lock cannot be opened. Therefore, it is known from EP 3 445 933 B1 that the locking latch is moved out of the engagement area with the rotary latch immediately after the locking process. The printed document discloses a locking aid for a motor vehicle lock with a rotary latch that can be locked by at least one pawl in a pre-latch position and in a main latch position, in order to move the rotary latch from the pre-latch position to the main latch position by motor power, wherein the locking aid comprises a movable locking latch for locking by motor power, and wherein the locking latch can be moved from an initial position to an end position along a first path for locking, with the return movement of the locking latch from the end position to the initial position occurring along a second path.The lock can therefore be reopened immediately after the closing process has ended.

[0012] The solutions known from the prior art have generally proven effective and offer good approaches, but are in need of improvement. In particular, the use of electric motors to operate the locking functions depends on the ease of operation of the functional elements. This is where the invention comes in. The object of the invention is to enable an easy and immediate interruption of the closing action, which, moreover, requires only a small number of components and allows for a space-saving design.

[0013] The problem is solved by the features of independent claim 1. Advantageous embodiments of the invention are specified in the dependent claims. It should be noted that the exemplary embodiments described below are not limiting; rather, any number of variations of the features described in the description and the dependent claims are possible.

[0014] According to claim 1, the object of the invention is achieved by providing a closing aid for a motor vehicle lock and a motor vehicle lock with a closing aid, comprising a locking mechanism with a rotary latch and at least one pawl, wherein the rotary latch can be locked in a pre-latching and a main latching position by means of the pawl, an electrically actuated drive pawl, wherein the rotary latch can be moved from a pre-latching position to a main latching position by means of the drive pawl, and the drive pawl can be guided at least partially by means of a control contour, and wherein the drive pawl can be articulated. The inventive design of the drive pawl now makes it possible to move the drive pawl flexibly and quickly out of the engagement area with the rotary latch.On the one hand, the rotary latch can be driven via the conventional closing action, and on the other hand, the drive pawl can engage with the rotary latch via the control contour. An advantage of the invention arises when the closing action is to be interrupted or when the closing action is complete and the operator initiates the opening of the lock. Due to the articulated design of the drive pawl, it is possible to move the drive pawl directly out of engagement with the rotary latch. Advantageously, the drive pawl is not bound to the position of an actuating lever of the drive pawl. This offers an advantage, for example, when the actuating lever is operated via an electric motor and a downstream gearbox. The drive pawl can be pivoted out of engagement with the rotary latch without having to reset the gearbox.However, even with indirect actuation of the actuating lever, for example via an electrically driven Bowden cable, the articulated movement of the drive pawl is independent of a return movement of the Bowden cable and thus of a return movement of the actuating lever to its starting position.

[0015] In an advantageous embodiment of the invention, the drive pawl is made of at least two parts and has a stop. According to this embodiment, the drive pawl is constructed from two parts, the two parts of which are pivotally connected to each other. In other words, the drive pawl has two parts that form a hingeable lever. A stop is arranged on the drive pawl for positional stabilization and, in particular, for transmitting the closing force. The stop enables the closing force to be transmitted from the actuating lever to the rotary latch. For this purpose, the drive pawl can be guided at least along the closing path by means of the control contour. In other words, the control contour and the stop interact in such a way that a reliable transmission of the closing force is possible.

[0016] It can be advantageous if the drive pawl is designed to deflect in only one direction. For this purpose, a stop can be arranged on the drive pawl itself such that the articulated connection of the two parts of the drive pawl can deflect in only one direction. For example, a portion of one part of the drive pawl can extend over the other part and, in particular, over the articulated connection. The extension, acting as a stop, can extend only partially along one side of the other part or enclose the other part on one or both sides. If the stop is arranged on one side of the drive pawl and preferably opposite to the control contour, the stop, in combination with the control cam, forms a guide for the drive pawl during its movement towards the rotary latch and, in particular, during the closing process.

[0017] In a further embodiment, the drive pawl has at least one drive lever and one coupling element. The drive pawl has a first drive lever that is pivotally mounted directly on the actuating lever of the closing aid. The drive lever extends from the bearing point on the actuating lever to a further pivotally mounted bearing point. The coupling element is pivotally mounted at this further bearing point, and the coupling element can be directly engaged with the rotary latch. The coupling lever itself can come into direct contact with the rotary latch; however, it is also conceivable that, for example, a bolt could be arranged on the coupling element, which would, for instance, engage positively with the rotary latch. The force for closing is thus transmitted via the actuating lever, the drive lever, and the coupling element to the rotary latch.As explained above, the actuating lever can be driven via a gearbox and / or a Bowden cable. The clutch element is guided by the control contour in such a way that the clutch lever can engage directly in the engagement area of ​​the rotary latch, whereby the clutch lever can be guided by the control contour and the stop in such a way that the clutch lever can follow the rotational movement of the rotary latch over a radius in order to move the rotary latch into the overtravel position.

[0018] Advantageously, the clutch lever can be guided by the control contour. The clutch lever is pivotally connected to the drive lever, with the movement between the drive lever and clutch lever being limited by the stop. Preferably, a force acts on the clutch lever, or at the joint between the drive lever and the clutch lever, which biases the clutch lever towards the stop. Additionally, a preload spring can be provided at the joint between the clutch lever and the drive lever, which biases the drive pawl towards the stop to stabilize its position. Besides the bias resulting from the design of the pivotal connection between the drive lever and the clutch lever and the spring bias, the control contour serves to reliably engage the drive pawl with the rotary latch.

[0019] If the control contour is arranged on a housing and / or a lock case and / or a reinforcement plate of the vehicle lock, a further embodiment of the invention results. The control contour guides the drive pawl and securely holds it in its initial position. Even during the closing process, the control contour can guide the drive pawl, at least partially. For this purpose, the control contour can, for example, be arranged on a lock case of the vehicle lock, so that no further components need to be provided in the vehicle lock to guide the drive pawl. Alternatively, the control contour can, for example, be arranged on a reinforcement plate in the vehicle lock; however, it is also conceivable that the vehicle lock housing itself provides at least part of the control contour.The lock housing is preferably manufactured as an injection-molded component, making it easy to incorporate a control contour. The lock case and reinforcement plate are typically made of a steel material and can therefore withstand high forces. This makes it advantageous to guide the drive pawl, particularly in the overtravel range, through the lock case and / or the reinforcement plate.

[0020] As explained above, the drive pawl is guided by means of a stop. It has proven advantageous to design the clutch lever with a stop to guide the drive pawl securely and ensure force transmission towards the rotary latch. The clutch lever can therefore be positioned and held in place by means of a stop. A reliable transmission of the closing force to the rotary latch is ensured by the preload spring on the one hand, and by the closing torque or stop torque acting in the direction of the stop on the other.

[0021] Another embodiment arises when the drive pawl can be deflected by means of the locking pawl. If the closing process is to be interrupted, or if, after closing, the drive pawl is to be moved out of the engagement area with the rotary latch, the locking pawl can advantageously be used to deflect the drive pawl. The locking pawl must be moved to unlock the locking mechanism. If the locking pawl is now moved manually or by an electric motor, so that the locking mechanism is unlocked, this movement can be used to deflect the drive pawl. The locking pawl thus fulfills a dual function. On the one hand, it can initiate the unlocking of the locking mechanism, and on the other hand, it can interrupt the closing process. This demonstrates a significant advantage of the inventive design of the motor vehicle lock with closing aid, namely that only the holding or...A positioning force acting on the drive pawl must be overcome. The drive pawl is, for example, spring-loaded and / or held in engagement with the rotary latch by means of the stop and the corresponding torque in the drive pawl's joint. If the locking pawl is now moved, only the holding or positioning force in the drive pawl needs to be overcome to move the drive pawl out of engagement with the rotary latch. The drive pawl then buckles due to the movement of the locking pawl in the direction opposite to the stop. The drive pawl is thereby bent or deflected. If the clutch lever, in particular an ejector arranged on the clutch lever, can be brought into engagement with the locking pawl, a further embodiment of the invention can be achieved.If the clutch lever has an ejector, a force can be applied to the drive pawl by means of a lever. The clutch lever can have an extension in the form of an ejector. This extension forms the ejector and engages with the pawl. This offers several advantages. On the one hand, the lever ratio with which the ejector acts on the drive pawl can be set by adjusting the ejector's extension and engagement with the pawl. On the other hand, an optimized arrangement of the drive pawl with respect to the rotary latch is possible. The ejector extension thus offers an advantage with regard to the force to be generated and its arrangement in the vehicle. For example, a pin or bolt can be arranged on the pawl, which engages with the ejector when the pawl moves.This initiates both the unlocking of the locking mechanism and the deflection of the drive pawl. The force required at the drive pawl's joint to deflect or pivot the drive pawl is small compared to the force transmitted when closing, and the lever action of the ejector allows the holding or positioning force in the drive pawl to be easily and reliably overcome.

[0022] As explained above, the drive pawl is pivotally mounted on an actuating lever. The drive pawl is designed such that the stop, the control cam, and the engagement with the rotary latch create a closing torque in the drive pawl. Therefore, the closing torque only needs to be present in certain sections of the drive pawl. As long as the drive pawl is guided by the control cam and the stop acts between the clutch lever and the drive lever, no closing torque is required, since the drive pawl can be clearly guided. A closing torque is only advantageous when the clutch lever or the drive pawl is freely engaged with the rotary latch. However, frictional forces and the spring preload in the drive pawl's joint may also be sufficient to ensure reliable transmission of the closing force to the rotary latch.

[0023] The inventive design of the vehicle lock, with its at least partially integrated pulling aid, ensures the reliable release of the drive pawl from the engagement with the rotary latch. Safety is further enhanced by the fact that only minimal force is required to move the drive pawl out of the engagement with the rotary latch. This also allows for reliable electrical unlocking at any point during the closing process. Even high forces, such as those acting on the drive pawl in the overtravel position of the rotary latch, can, via the leverage ratio at the ejector and the electrical actuation of a release lever acting on the locking pawl, provide sufficient force to initiate unlocking and move the drive pawl out of the engagement area with the rotary latch.

[0024] When the invention refers to a motor vehicle lock, this includes motor vehicle locks that are used, for example, in side doors, sliding doors, flaps, hoods and / or covers, wherever pivotally or slidably mounted components are arranged on the motor vehicle. It is also conceivable that the motor vehicle lock is arranged in the backrest of a seat or is used as a floor lock for a removable seat, to name just a few application examples.

[0025] The vehicle lock has a locking mechanism comprising a rotary latch and at least one pawl. Preferably, at least one pawl is arranged in the same plane as the rotary latch and is capable, in conjunction with the lock holder, of locking the rotary latch in a specific position. When the locking mechanism is open, the entry jaw of the rotary latch points towards the lock holder, and a relative movement between the lock holder and the rotary latch causes the rotary latch to pivot. The pawl is generally biased towards the rotary latch so that, upon reaching a detent position, the pawl engages with the rotary latch or the detent element. A release lever is used to unlock the locking mechanism, the release lever interacting with the locking mechanism and preferably with the pawl in such a way that the locked locking mechanism can be unlocked by moving the release lever.The release lever is, for example, pivotally mounted in the vehicle lock and capable of moving at least one pawl out of the engagement area with the rotary latch. Systems with one, two, or even three pawls are used. For instance, it is conceivable that the pre-lock position is equipped with a separate pawl, whereby in the main locking position, the pawl interacts with another pawl, and the second pawl is held in engagement with the rotary latch by a third pawl, which can also be described as a blocking lever or locking lever.

[0026] In a preferred embodiment, the locking mechanism according to the invention has a pre-latching pawl which is arranged in a parallel plane within the vehicle lock. The pre-latching pawl can be mounted on an axis of the main locking pawl, so that only one axis is required for the pivotable mounting of the pre-latching pawl and the main locking pawl. The pre-latching pawl can preferably be engaged by a contour on or a bolt on the rotary latch to achieve a pre-latching position of the locking mechanism.

[0027] The vehicle lock constructed according to the invention is particularly suitable for an electrically operated vehicle lock. As already explained in the introduction, an electrically operated vehicle lock is unlocked by means of an electric drive, preferably an electric motor with a downstream gearbox. It can therefore be unlocked particularly easily because only small forces act between the rotary latch and the pawl during the unlocking process. There is no immediate tearing, i.e., a release of the pawl from the detent element, but rather the pawl first rolls on the detent element, which reduces the force, in particular the sealing force acting on the rotary latch of, for example, a tailgate, so that there is a low surface pressure between the detent element and the pawl when the pawl releases from the detent element.Furthermore, the ability to set a high locking ratio results in lower overall surface pressures between the locking pawl and the detent element. The vehicle lock according to the invention is therefore particularly suitable for electrical unlocking of the locking mechanism, so that an electrically operated lock, a so-called e-lock, can advantageously be provided.

[0028] When the door, flap, or sliding door closes, the locking mechanism engages with the latch. The rotary latch has an engagement area, also known as a fork opening, which consists of a catch arm and a load arm. The latch first engages with the catch arm and pivots the rotary latch until the locking pawl engages in a pre-latch or main latch position. In the main latch position, a high load acts on the rotary latch, preferably generated by a seal on the door or flap. A rotary latch spring, which additionally applies force to the rotary latch in the opening direction, also generates a force, but this is much less than the sealing force acting on the rotary latch in the opening direction.

[0029] In the locked state, and especially in the main locking position of the locking mechanism, the load arm of the rotary latch engages with the lock holder. The load or force that develops between the lock holder and the rotary latch then acts on the load arm of the rotary latch. The force on the load arm, the distance of the lock holder's engagement point on the load arm, and the distance of this engagement point on the load arm to the axis of the rotary latch constitute the measure for calculating the locking ratio. The increasing force, which manifests as torque in the rotary latch, is counteracted by the pawl. The pawl provides the opposing force and, relative to the distance between the pawl's engagement point and the axis of the rotary latch, the corresponding counter-torque for holding the lock holder in the vehicle lock.

[0030] The invention is explained in more detail below with reference to the accompanying drawings and a preferred embodiment. However, it is important to note that the embodiment does not limit the invention but merely represents an advantageous configuration. The features shown can be implemented individually or in combination with other features described in the description and claims.

[0031] Fig. 1

[0032] Figure 1 shows a top view of an open motor vehicle lock with a view of part of a pull-out aid and a locking mechanism.

[0033] Figure 2 shows the motor vehicle lock according to Figure 1, with the pull-out aid shown in engagement with the rotary latch.

[0034] Figure 3 shows the closing process, wherein the closing aid has moved the rotary latch into an overtravel position, and

[0035] Figure 4 shows the deflection of the drive pawl by means of the locking pawl.

[0036] Figure 1 shows a top view of an open vehicle lock 1 with part of a puller 2 and a locking mechanism 3. The puller 2 is shown in its initial position A. An actuating lever 4 is pivotally mounted in a lock case 5 and carries a drive pawl 6. The drive pawl 6 is pivotally mounted in the actuating lever 4. In this embodiment, the drive pawl 6 is formed from a drive lever 7 and a clutch lever 8. The clutch lever 8 is pivotally mounted in the drive lever 7. The clutch lever 8 has an ejector 9 that extends towards the locking mechanism 3 in the vehicle lock 1. The clutch lever 8 also has a stop 10, which is supported on the drive lever 7. The drive lever 7 is engaged with the system. The locking mechanism 3 consists of a rotary latch 11 and a pawl 12.The pawl 12 is, as is generally known, spring-loaded in the direction of the rotary latch 11 and rests against the rotary latch 11 under spring tension. The rotary latch 11 is shown in two positions, with the rotary latch position 11' representing the state of the rotary latch 11 in the overtravel position. A release lever 13 acts on the pawl 12, whereby the pawl 12 can be moved counterclockwise by means of the release lever 13, thus enabling the release of the locking mechanism 3. The release of the locking mechanism 3 is known insofar as it can be effected by means of the release lever 13, for example, by means of an internal or external actuation or electromechanically. In the overtravel position, the rotary latch 11 comes to rest against a rotary latch buffer 14.

[0037] Figure 1 shows the initial position A of the pull-out aid 2. In this initial position A, the actuating lever 4 is in its unactuated state. The actuating lever 4 is pivotably mounted in the lock case 5 about the axis 15. If, for example, a force F is exerted on the actuating lever 4 by means of a Bowden cable 16, the actuating lever 4 pivots clockwise about the axis 15. The movement of the actuating lever 4 causes the drive pawl 6 to move towards the rotary latch. The drive pawl 6, and in particular the clutch lever 8, bears against a control contour 17. A bolt 18 arranged on the clutch lever 8 can, for example, serve this purpose. As can be clearly seen in Figure 1, the drive pawl 6 extends from the actuating lever 4 towards the rotary latch 11, 11'.When the actuating lever 4 is actuated, the drive pawl is moved across the control cam 17, whereby the stop 10, in conjunction with the control cam 17, allows movement exclusively in the direction of the rotary latch 11, 11'. The drive pawl 6 is effectively guided between the control contour 17 and the stop 10. Engagement of the drive pawl 6 in an engagement contour 19 of the rotary latch 11, 11' is thus ensured.

[0038] Figure 2 shows the actuation of the actuating lever 4 and the engagement of the drive pawl 6 with the rotary latch 11, 11'. For this purpose, the actuating lever 4 was pivoted about the axis 15, resulting in a movement of the actuating lever 4 in the direction of arrow P. The drive pawl 6 was moved along the control contour 17 until the clutch lever 8 engaged with the rotary latch 11. To ensure reliable movement of the drive pawl 6, and in particular reliable movement along the control cam 17, an additional spring force Ff can act on the drive pawl 6. The spring force Ff is symbolically represented by a directional arrow at the pivot point of the drive pawl 6. The spring force Ff can also be located at the joint 20 between the drive lever and the clutch lever. Figure 2 thus shows the activation of the pull aid 2 .

[0039] If the actuating lever 4 is now pivoted further in the direction of arrow P, the rotary latch 11 can be moved into an overtravel position by means of the pulling aid 2, as shown in Figure 3. In the overtravel position of the rotary latch 11', the pawl 12 can engage in a main detent of the rotary latch 11, 11'. The pawl 12 is shown in the main detent position in Figure 3.

[0040] If, during the closing process or immediately upon reaching the overtravel position of the rotary latch 11', the locking mechanism 3 is unlocked, the pawl 12 is pivoted counterclockwise, for example by means of the release lever 13, as shown in Figure 4. Unlocking the locking mechanism 3 results in the pawl 12 being disengaged from the rotary latch 11, 11' and the ejector 9 being actuated by the pawl. Actuating the ejector 9 by means of the pawl 12, which can be done, for example, via a bolt 21 attached to the pawl 12, causes the drive pawl 6 to be deflected against the stop 10 and thus leave its stable position. The closing or... Holding in an overtravel position is interrupted, whereby the unstable position of the drive pawl 6 is further deflected by the rotational falling force Fd.The initial movement of the drive pawl 6 is therefore initiated by means of the locking pawl 12. The force of the rotary latch, which can result in particular from a door sealing force, fully deflects the drive pawl 6, thus enabling the locking mechanism to be unlocked and a lock catch to be released. As explained above, only a small holding or positioning force acts on the drive pawl 6 during the closing process, whereas the compressive force Fd is very large, so that interrupting the closing process by actuating the ejector 9 is easily and reliably possible.

[0041] Reference character list

[0042] 1 motor vehicle lock

[0043] 2 Pulling aids

[0044] 3 locks

[0045] 4 operating levers

[0046] 5 lock boxes

[0047] 6 drive pawl

[0048] 7 Drive levers

[0049] 8 clutch levers

[0050] 9 ejectors

[0051] 10 strikes

[0052] 11, 11 'Rotating trap

[0053] 12 Locking pawl

[0054] 13 Release levers

[0055] 14 rotary trap buffers

[0056] 15 axle

[0057] 16 Bowden cable

[0058] 17 Tax contour

[0059] 18, 21 Bol zen

[0060] 19 Intervention contour

[0061] 20 joint

[0062] 22 lock holders

[0063] A Starting point

[0064] F force

[0065] Ff spring force

[0066] F d Pressure

Claims

Patent claims 1. A closing aid (2) for a motor vehicle lock (1) comprising a locking mechanism (3) with a rotary latch (11, 11') and at least one pawl (12), wherein the rotary latch (11, 11') can be locked in a pre-latching and a main latching position by means of the pawl (12), an electrically actuated drive pawl (6), wherein the rotary latch (11, 11') can be moved from a pre-latching position to a main latching position by means of the drive pawl (6) and the drive pawl can be guided at least partially by means of a control contour (17), characterized in that the drive pawl (6) can be articulated.

2. Pulling aid (2) according to claim 1, characterized in that the drive pawl (2) can be formed in at least two parts and has a stop (10).

3. Closing aid (2) according to one of claims 1 or 2, characterized in that the drive pawl (6) can only be deflected in one direction.

4. Closing aid (2) according to one of claims 1 to 3, characterized in that the drive pawl has at least one drive lever (7) and one clutch lever (8).

5. Pulling aid (2) according to claim 4, characterized in that the clutch lever (8) can be guided with the control contour (17).

6. Closing aid (2) according to one of claims 4 or 5, characterized in that the control contour (17) can be arranged on a housing and / or a lock case (5) and / or a reinforcement plate of the motor vehicle lock (1).

7. Pulling aid (2) according to one of claims 4 to 6, characterized in that the clutch lever (8) can be positioned by means of a stop (10).

8. Closing aid (2) according to one of claims 1 to 7, characterized in that the drive pawl (6) can be deflected by means of the locking pawl (12).

9. Pulling aid (2) according to one of claims 4 to 8, characterized in that the clutch lever (8) , in particular an ejector (9) arranged on the clutch lever (8) , can be brought into engagement with the pawl (12).

10. Closing aid (2) according to one of claims 1 to 9, characterized in that the drive pawl (6) can be pivotably mounted on an actuating lever (4).

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