EP3524758B1 - Motor vehicle lock - Google Patents

Description

The invention relates to a motor vehicle lock with a carrier element, a rotary latch which is rotatably mounted on the carrier element and which can be moved from an open position into a main latching position, and a pawl which is pivotably mounted on the carrier element and which engages in a rotary latch arranged in its main latching position Locking position is movable and which has a latching hook, and a immobilization lever which is pivotally mounted on the carrier element in a immobilization position in which the immobilization lever blocks a rotational movement of the rotary latch arranged in its main latching position, one of the immobilization levers moving in the direction of the rotary latch their main position in a direction away from the rotary catch pushing evasive device, and wherein the evasive device is coupled to the immobilization lever such that the immobilization lever only then in its immobilization position tion pivots when the rotary latch is arranged in its main latching position and the pawl in its locking position.

A motor vehicle lock of the type described in the introduction is, for example, from the document DE 10 2012 102 724 A1 known. In this known motor vehicle lock, a pawl and a rotary latch are rotatably mounted on a support element, a immobilization lever being provided, which is also rotatably mounted on the support element. The immobilization lever ensures that in the main latching position of the rotary latch, the rotary latch is held in a clamping manner, the rotary latch and the immobilization element being coupled in motion. By holding the rotary latch in a jamming manner, there is a clattering Avoid noise between the rotary latch and a locking bolt arranged in the mouth of the rotary latch. The immobilization lever interacts with an actuator of the rotary latch and a signal lever of the motor vehicle lock. The immobilization lever exerts a wedge effect on the locking bolt in a closed position of the motor vehicle lock with a stop flank. This wedge effect causes a self-locking effect. The immobilization lever is held back by the signal element during an opening process. The position of the signal element is dependent on a drive element, so that the immobilization lever is only released during a closing process when the drive element has assumed a predetermined position. In this predetermined position of the drive element, the signal element is then positioned in a predetermined position in which the immobilization lever is released. The disadvantage here is that the release of the immobilization lever is thus solely dependent on the drive element which is energized for a predetermined period of time. There is a risk that when a flap for which the motor vehicle lock is provided is thrown quickly and powerfully, the immobilization lever is arranged in the movement path of the rotary latch or another component of the motor vehicle lock and can be damaged. On the other hand, an automatic locking aid function is provided in such a motor vehicle lock, in which, for example, the rotary latch is converted by motor from a pre-locking state to a main locking state. With such a locking aid function, there is a risk that the immobilization lever will come to its immobilization position immediately and therefore too early, since the angular velocity of the rotary latch is low compared to the process of rapid and powerful throwing, which causes the rotary latch to be pulled beyond its main rest position would lead to a sudden increase in force in the closing chain, which would damage the components of the motor vehicle lock over their lifespan or reduce their lifespan. A cable pull of the motor vehicle lock would be particularly at risk since it is usually spindled on a cam disc. The reason for the cam disc moving beyond the main catch position of the rotary latch is due to the latency or delay time of the control unit, which can be quite high.

The invention has for its object to provide a solution which provides an improved motor vehicle lock in a structurally simple manner, in which both in a manual locking operation, in which, for example, a flap of a motor vehicle is thrown quickly and powerfully, as well as in an auxiliary locking operation which the motor vehicle lock is converted by motor from a pre-latching state to a main latching state, damage to components of the motor vehicle lock is avoided and nevertheless a secure closing is ensured.

In the case of a motor vehicle lock of the type described in the introduction, the object is achieved in that the rotary latch rotatably mounted on an axis of rotation has an arc-shaped support surface which is formed in a first radius from the axis of rotation, a radial recess being formed in the arc-shaped support surface, in which engages a locking pin formed on the immobilization lever blocking a rotary movement of the catch when the immobilization lever is arranged in its immobilization position.

Advantageous and expedient refinements and developments of the invention result from the respective subclaims.

The invention provides a motor vehicle lock, which is simple Design with a safe operating behavior during a closing process. Characterized in that, according to the invention, the motor vehicle lock has an evasive device which, when the rotary latch is moved in the direction of its main latching position, urges the immobilization lever in a direction away from the rotary latch, so that when the rotary latch is moved in a locking operation or in an auxiliary locking operation, the immobilization lever outside the movement path of the rotary latch is arranged, it is ensured that the immobilization lever is not arranged in the path of the rotary latch during the closing process. This reliably prevents a collision between the rotary latch and the immobilization lever and damage to the two components. Also, the delay time or latency in the motor-assisted locking auxiliary operation no longer has an adverse effect according to the invention, since the immobilization lever is only arranged in its immobilization position when the rotary latch is arranged in its main detent position and the pawl is arranged in its locked position. Because according to the invention it is not possible for the immobilization lever to reach its immobilization position before the pawl is not arranged in its latching position.

In one embodiment of the motor vehicle lock, the invention provides that the pawl pivotably mounted about a pawl axis has a support pin extending in an axial direction, which is arranged between the pawl axis and the latching hook, and a support surface is formed on the immobilization lever, the support surface abuts on a circumferential section of the support pin facing away from the catch when the latching hook of the pawl is arranged lying on the circular-arc-shaped support surface. Consequently, the pawl retains the immobilization lever in a position such that the locking pin of the immobilization lever does not come into its Can reach the immobilization position and fall into the radial recess of the rotary latch as long as the latching hook of the pawl rests at least on the support surface.

To increase operator convenience, the invention provides in a further embodiment that a closing lever is pivotally mounted about a lever axis on the carrier element, wherein in one of the rotary latches from a pre-latching position between the open position and the main latching position to its main latching position, an auxiliary element of the motor vehicle lock has a drive element Pull lever moved from a neutral position into an operating end position, and in the operating end position the catch in its main detent position and the pawl are arranged in their locking position. If, for example, an operator throws a flap of the motor vehicle during a closing operation with a closing force or pre-latching closing force, so that the catch is arranged in its pre-latching position, which can be achieved, for example, with a pre-latching lever that is coupled to the pawl, then the closing lever moves the locking aid operation the rotary latch from its pre-locking position to the main locking position without an operator having to act.

For this purpose, there is a structurally advantageous possibility that the rotary latch has a radially extending actuating shoulder and the closing lever is formed with an actuating arm, the actuating arm and the actuating arm being arranged at a distance from one another in the neutral position, the actuating arm in the auxiliary locking mode of the motor vehicle lock engaging the actuating shoulder during the movement of the closing lever from the neutral position into the operating end position and the rotary latch is designed to rotate about the axis of rotation into its main detent position.

So that the locking lever does not come into engagement with the catch too early in the auxiliary locking operation, which can be the case, for example, if the pawl is not yet arranged in its latching position, the invention provides in a further embodiment that the evasive device provides one at which Pulling lever formed on the avoidance approach and a formed on the idle pivot pivotally mounted about a pivot axis, in the neutral position of the avoidance approach is spaced from the avoidance pin, and wherein when moving the pulling lever from the neutral position to the operating end position, the avoidance approach to the avoidance pin and the immobilization lever is urged around the pivot axis in a direction pointing away from the rotary latch.

The invention provides in a further embodiment that a main catch is formed at one end of the circular-shaped contact surface of the catch, which engages with the locking hook formed on the pawl when the catch is arranged in its main catch position and the pawl in its locked position, whereby the evasive device has an elevation surface which is curved radially outward with respect to the axis of rotation, which is arranged between the radial recess and the main catch and which extends from the circular-arc-shaped support surface. With the help of the elevation surface, the pawl and consequently the immobilization lever are guided even further radially away from the catch surface during a closing operation from the actual contact surface, so that the risk is further reduced that the immobilization lever engages with the catch latch too early.

In particular in the case of a closing process in which the operator throws the flap with such a high closing force that the catch latches over the pre-locking position and the In a further embodiment of the invention, it is advantageous if the elevation surface extends with a second radius with respect to the axis of rotation from the support surface, the difference between the second radius and the first radius being related to the first Radius is at least 1.5% and at most 10%. This ensures sufficient acceleration of the pawl in a direction radially away from the catch.

In this regard, it is also advantageous if the circular-arc-shaped contact surface extends over a circular-arc section which is defined by an associated center point angle, which is related to the axis of rotation and which is between 10% and 25% with respect to a center point angle of the contact surface. This configuration also ensures that the pawl is sufficiently accelerated in a direction radially and away from the rotary latch.

In a further embodiment of the invention, it is then provided that during a closing operation as a result of a closing force caused by an operator, the rotary latch moves over the pre-latching position and the main latching position into an overtravel position beyond the main latching position, the pawl having a greater mass than the immobilization lever. Characterized in that the pawl has a greater mass than the immobilization lever, the immobilization lever experiences a higher acceleration in a direction away from the rotary latch than the pawl when the locking hook of the pawl moves over the elevation surface. The pawl has greater inertia than the immobilization lever.

Accordingly, it is provided in a further embodiment of the invention that, due to inertial forces in the closing operation, the elevation surface urges the pawl so accelerated in a direction away from the catch, that the support surface and the support pin are arranged at a distance from one another at the latest in the overstroke position. In contrast to the auxiliary locking mode, in which the accelerations are so low that the support surface of the immobilization lever is still in contact with the support pin of the pawl, the accelerations are sufficient in the locking operation effected by an operator so that the support surface is at a distance from the support pin is arranged.

The invention provides in a further embodiment that the pawl is arranged in the overstroke position of the rotary latch in the locked position, the rotary latch being spring-biased in the direction of its open position in such a way that the rotary latch rotates from the overstroke position into the main rest position and into the main rest position with the Pawl is engaged. In this case, for example, a spring element can be provided for the fact that the rotary latch is acted upon by a spring force in the direction of its open position and thereby strives to move into its open position.

Finally, the invention provides in a further embodiment that, in the overstroke position, the locking pin of the immobilization lever is arranged to rest on the circular-arc-shaped contact surface of the rotary latch between the radial recess and the elevation surface. This ensures that when the rotary latch moves back into its main latching position, the latching pin of the immobilization lever can engage in the radial recess of the rotary latch and ensures that the rotary latch is immobilized.

The scope of the invention is defined by the claims.

Further details, features and advantages of the subject matter of the invention result from the following description in connection with the drawing, in which an exemplary and preferred embodiment of the invention is shown.

• Figur 1 eine schematische Darstellung eines Kraftfahrzeugs mit einem Kraftfahrzeugschloss gemäß der Erfindung,
• Figur 2 eine seitliche Ansicht des Kraftfahrzeugschlosses gemäß der Erfindung mit einem Antriebselement,
• Figur 3 eine perspektivische Ansicht auf das Kraftfahrzeugschloss aus Figur 2,
• Figur 4 eine perspektivische Einzelteildarstellung des Kraftfahrzeugschlosses unter Auslassung eines zur Lagerung und Anbringung dienenden Trägerelements,
• Figur 5 eine seitliche Darstellung einer Drehfalle des Kraftfahrzeugschlosses,
• Figur 6 eine Detaildarstellung der Figur 5,
• Figur 7 eine Seitenansicht auf das Kraftfahrzeugschloss bei einem Schließhilfsbetrieb, wobei die Drehfalle in einer Vorraststellung angeordnet ist,
• Figur 8 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem Schließhilfsbetrieb, wobei ein Zuziehhebel des Kraftfahrzeugschlosses aus einer Neutralstellung heraus bewegt ist,
• Figur 9 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem Schließhilfsbetrieb, wobei der Zuziehhebel einen Ruhigstellungshebel in eine von der Drehfalle wegweisende Richtung drängt,
• Figur 10 eine Detailansicht der Figur 9,
• Figur 11 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem Schließhilfsbetrieb, wobei eine Sperrklinke des Kraftfahrzeugschlosses in einer Raststellung und die Drehfalle in einer Hauptraststellung angeordnet sind und der Ruhigstellungshebel mit der Drehfalle noch nicht in Eingriff steht,
• Figur 12 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem Schließhilfsbetrieb, wobei der Ruhigstellungshebel mit der Drehfalle in Eingriff steht,
• Figur 13 eine Seitenansicht auf das Kraftfahrzeugschloss bei einem manuellen Schließbetrieb, wobei die Drehfalle und die Sperrklinke in einer Ausgangsstellung eines Schließvorgangs angeordnet sind,
• Figur 14 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem manuellen Schließbetrieb, wobei die Drehfalle in Richtung ihrer Hauptraststellung bewegt wird,
• Figur 15 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem manuellen Schließbetrieb, wobei die Sperrklinke eine auf der Drehfalle ausgebildete Erhebungsfläche überschreitet,
• Figur 16 eine Detailansicht der Figur 15,
• Figur 17 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem manuellen Schließbetrieb, wobei die Drehfalle in ihrer Hauptraststellung angeordnet ist,
• Figur 18 eine Detailansicht der Figur 17,
• Figur 19 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem manuellen Schließbetrieb, wobei die Drehfalle in einer Überhubstellung angeordnet ist,
• Figur 20 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem manuellen Schließbetrieb, wobei sich die Drehfalle in ihre Hauptraststellung zurückgedreht hat, und
• Figur 21 eine Seitenansicht auf das Kraftfahrzeugschloss bei dem manuellen Schließbetrieb, wobei die Drehfalle in ihrer Hauptraststellung und die Sperrklinke in ihrer Raststellung angeordnet sind und die Drehfalle mit der Sperrklinke in Eingriff steht, und wobei aber auch der Ruhigstellungshebel mit der Drehfalle in Eingriff steht.

The drawing shows:

• Figure 1 1 shows a schematic illustration of a motor vehicle with a motor vehicle lock according to the invention,
• Figure 2 2 shows a side view of the motor vehicle lock according to the invention with a drive element,
• Figure 3 a perspective view of the motor vehicle lock from Figure 2 ,
• Figure 4 2 shows a perspective individual part representation of the motor vehicle lock, omitting a support element used for storage and attachment,
• Figure 5 a side view of a rotary latch of the motor vehicle lock,
• Figure 6 a detailed representation of the Figure 5 ,
• Figure 7 2 shows a side view of the motor vehicle lock in an auxiliary locking mode, the rotary latch being arranged in a pre-locking position,
• Figure 8 2 shows a side view of the motor vehicle lock during the auxiliary locking operation, a closing lever of the motor vehicle lock being moved out of a neutral position,
• Figure 9 3 shows a side view of the motor vehicle lock during the auxiliary locking operation, the closing lever pushing a immobilization lever in a direction pointing away from the rotary latch,
• Figure 10 a detailed view of the Figure 9 ,
• Figure 11 a side view of the motor vehicle lock in the auxiliary locking operation, wherein a pawl of the motor vehicle lock is arranged in a locking position and the rotary latch in a main locking position and the The idle lever is not yet engaged with the rotary latch,
• Figure 12 2 shows a side view of the motor vehicle lock during the auxiliary locking operation, the immobilization lever being in engagement with the rotary latch,
• Figure 13 2 shows a side view of the motor vehicle lock in a manual locking operation, the rotary latch and the pawl being arranged in a starting position of a locking operation,
• Figure 14 2 shows a side view of the motor vehicle lock in the manual locking mode, the rotary latch being moved in the direction of its main catch position,
• Figure 15 2 shows a side view of the motor vehicle lock in the manual locking mode, the pawl exceeding an elevation area formed on the rotary latch,
• Figure 16 a detailed view of the Figure 15 ,
• Figure 17 2 shows a side view of the motor vehicle lock in the manual locking mode, the rotary latch being arranged in its main latching position,
• Figure 18 a detailed view of the Figure 17 ,
• Figure 19 2 shows a side view of the motor vehicle lock in the manual locking mode, the rotary latch being arranged in an overstroke position,
• Figure 20 a side view of the motor vehicle lock in the manual locking operation, wherein the rotary latch has turned back into its main click position, and
• Figure 21 a side view of the motor vehicle lock in the manual locking mode, the rotary latch being arranged in its main latching position and the pawl in its latching position and the rotary latch being in engagement with the pawl, and but also the immobilization lever being in engagement with the rotary latch.

In the Figure 1 A motor vehicle 1 is shown as an example in the form of a car, which in the example has a Has flap or tailgate 2, which can be closed via a motor vehicle lock 3 and can be opened. The motor vehicle lock 3 has a locking mechanism, which has a like in Figure 2 Connection element 4 shown, such as a Bowden cable, is connected to a drive element 5. In the present exemplary embodiment, the drive element 5 is designed in the manner of a closing device and is used to automatically carry out the locking process for the locking mechanism, which in the present case comprises a catch 6 and a pawl 7, in order to convert the motor vehicle lock 3 from a pre-locking state into a main locking state . In the present exemplary embodiment, the drive element 5 moves the rotary latch 6 coupled to the closing lever 8 via a closing lever 8, so that the rotating latch 6 is moved from a pre-latching position into a main latching position, the corresponding flap 2 being brought into its closed position against the force of a seal becomes. However, the invention is not restricted to the motor vehicle lock 3 being used on a tailgate 2. The motor vehicle lock 3 according to the invention can be used for motor vehicle doors and for motor vehicle flaps of any kind.

The Figure 3 shows a perspective view of the motor vehicle lock 3, in which case the connection element or Bowden cable 4 and the drive element 5 have been omitted. In Figure 4 A partial representation of the motor vehicle lock 3 is then shown, wherein in Figure 4 for the sake of clarity, the Bowden cable 4, the drive element 5 and a support element 9 have not been shown. As the Figures 2 and 3 show, the carrier element 9 is used to store the individual components of the motor vehicle lock 3, the carrier element 9 being a compact structural unit which can be attached, for example, to a body component of the motor vehicle 1, whereas one which is fixed by the catch 6 in the closed state of the flap 2 Locking bolt is attached to the flap 2. With regard to the Figures 2 to 4 It can be seen that in the motor vehicle lock 3 according to the invention, the rotary latch 6 is rotatably mounted on the carrier element 9 via an axis of rotation 10. Furthermore, the pawl 7 is pivotally mounted on the carrier element 9 via a pawl axis 11, the pawl 7 having a latching hook 12 which can cooperate with the rotary latch 6 in a closed position of the motor vehicle lock 3. Likewise, the closing lever 8 is rotatably mounted on the carrier element 9 via a lever axis 20. In addition, the motor vehicle lock 3 has a immobilization lever 14 which is pivotably mounted on the carrier element 9 via a pivot axis 15. In addition, the motor vehicle lock 3 has a pre-locking lever 16 which is pivotably mounted on the carrier element 9 via a pre-locking lever axis 17. The pre-locking lever 16 has at its free end a pre-locking contour 18 which can cooperate with a pre-locking pin 19, the pre-locking pin 19 being formed on the body of the rotary latch 6 and being located at a distance from the axis of rotation 10 of the rotary latch 6.

Again Figure 4 can also be seen, a locking pin 21 is formed on the immobilization lever 14. This locking pin 21 is intended to engage in a radial recess 22 of the rotary latch 6 in order to block a rotary movement of the rotary latch 6. The radial recess 22 is formed in an arc-shaped support surface 23 of the rotary latch 6. At one end of the circular arc-shaped support surface 23 of the rotary latch 6, a main catch 29 is also formed, which engages with the locking hook 12 formed on the pawl 7 when the rotary catch 6 is arranged in its main latching position and the pawl 7 in its blocking position. The pawl 7 pivotally mounted about the pawl axis 11 also has a support pin 25 extending in an axial direction 24, which is arranged between the pawl axis 11 and the latching hook 12 and which is used to support the The immobilization lever 14 is used. For this purpose, a support surface 26 is formed on the immobilization lever 14, with which the immobilization lever 14 can rest against the support pin 25 of the pawl 7. From the Figure 4 it can also be seen that the rotary latch 6 has a radially extending actuating projection 27 and the closing lever 8 is formed with an actuating arm 28. The actuating arm 28 and the actuating projection 27 cooperate in a so-called locking auxiliary operation when the catch 6 is moved into a main detent position with the aid of the pull lever 8 moved by the drive element 5. On the closing lever 8 there is also formed an avoidance projection 30 which, like the support pin 25, extends in the axial direction 24 and which cooperates with an avoidance pin 31 which is integrally formed on the immobilization lever 14 and extends radially from the immobilization lever 14.

In the Figure 5 the catch 6 is shown, the Figure 6 an enlarged detail view of the circular arc-shaped support surface 23 of the catch 6 shows. The bearing surface 23 is in a first radius 32 (the circle to this radius 32 is dashed in the Figures 5 and 6 shown) formed and arranged by the axis of rotation 10 or with respect to the axis of rotation 10 and is interrupted in the middle by the radial recess 22. Arranged between the radial recess 22 and the main catch 29 is an elevation surface 33 which is curved radially outwards and is better in the detailed view of FIG Figure 6 can be seen. The elevation surface 33 extends from the circular arc-shaped support surface 23. More precisely, the elevation surface 33 extends with respect to the axis of rotation 10 with a second radius 34 from the support surface 23, as in FIG Figure 6 is shown. As a design rule, the difference between the second radius 34 and the first radius 32 is at least 1.5% and at most 10% with respect to the first radius 32. How the Figures 5 and 6 can also be seen, the circular arc-shaped support surface 23 extends over a circular arc section 35 which is defined by an associated center angle 36, which is related to the axis of rotation 10 and which is between 10% and 25% with respect to a center angle 37 of the support surface 23.

The present invention is directed to the aspect of the closing process, for which purpose the rotary latch 6 can be moved from an open position into a main latching position. For locking purposes, the pawl 7 can be moved into a locking position which engages with the rotary latch 6 arranged in its main latching position, after which the immobilization lever 14 moves into a stationary position in which the immobilizing lever 14 blocks a rotational movement of the rotary latch 6 arranged in its main latching position. For this purpose, the locking pin 21 formed on the immobilization lever 14 engages in the radial recess 22 of the rotary latch 6 in order to block a rotary movement of the rotary latch 6. In order to prevent the immobilization lever 14 from blocking the catch 6 too early and causing damage to the motor vehicle lock 3, the invention sees the immobilization lever 14 urging in a direction pointing away from the catch 6 when the catch 6 moves in the direction of its main latching position trained evasion device 38 before. Because if the flap 2 is thrown too quickly and with a high force, the immobilization lever 14 can be placed in the path of movement of the rotary latch 6 when it is thrown and can be damaged. On the other hand, in a closing auxiliary operation effected by the drive element 5, the immobilization lever 14 can immediately move into the immobilization position and block the catch 6, because the angular velocity of the catch 6 is low in comparison to the rapid throwing. There is a risk that the rotary latch 6 is pulled out of the drive element 5 beyond the main latching position during the auxiliary locking operation would, which would lead to a sudden increase in force in the closing chain, which would result in damage over the service life. A cable pull would be particularly at risk because it is spindled over a cam. The reason why the rotary latch 6 continues to move beyond the main rest position is the latency of the control unit, which can be quite high. In order to avoid damage to the components of the motor vehicle lock 3 in these two operating situations, the avoidance device 38 is coupled to the immobilization lever 14 in such a way that the immobilization lever 14 pivots into its immobilization position only when the catch 6 in its main detent position and the pawl 7 in its Locking position are arranged, which in detail below with reference to the Figures 7 to 21 is described in more detail.

The Figures 7 to 12 show a closing process for an auxiliary locking operation, in which the drive element 5 actuates the closing lever 8 and the closing lever 8 the rotary latch 6 from a pre-locking position (see Figure 7 ) in the main rest position (see Figures 11 and 12 ) emotional. In the in Figure 7 Starting position shown, the rotary latch 6 is arranged in a pre-locking position, in which it is held by the pre-locking lever 16 and prevented from rotating into an open position, the rotary latch 6 being spring-biased in the direction of the open position, ie a spring element exerts a force on the Rotary latch 6, through which the rotary latch 6 strives to turn into its open position. In Figure 7 corresponds to the movement in the direction of the open position of a rotary movement of the rotary latch 6 in a clockwise direction, the latching pin 19 of the rotary latch 6 abutting against the latching contour 18 of the latching lever 16, whereby a rotational movement in the direction of the open position is blocked. The latching hook 12 of the pawl 7 rests on the circular support surface 23 of the rotary latch 6, the support pin 25 of the pawl 7 holding the immobilization lever 14 at a distance from the rotary latch 6. Is the pre-locking position of the Rotary catch 6 is detected, the drive element 5 is put into operation. The drive element 5 pulls on the closing lever 8 and rotates it clockwise around the lever axis 20, as a result of which the actuating arm 28 moves in the direction of the rotary latch 6. In the Figure 7 The position of the closing lever 8 shown corresponds to a neutral position of the closing lever 8, in which the closing lever 8 does not act on the rotary latch 6 and the actuating projection 27 and the actuating arm 28 are arranged at a distance from one another. In Figure 8 the actuating arm 28 of the closing lever 8 bears against the actuating projection 27 of the rotary latch 6, the evasion projection 30 additionally moving in the direction of the evasion pin 31 of the immobilization lever 14 during the rotational movement of the closing lever 8. In Figure 9 the closing lever 8 has already moved the rotary latch 6 in the direction of the main latching position, the evasion projection 30 of the closing lever 8 abutting on the avoiding pin 31 of the immobilization lever 14 and preventing the latching pin 21 of the closing lever 8 from moving in the direction of the rotary latch 6, as in FIG Figure 10 is shown, which is an enlarged and perspective view of the Figure 9 is. Rather, the evasion approach 30 of the pull lever 8 holds the locking pin 21 of the pull lever 8 in a position spaced from the radial recess 22. In Figure 11 the closing lever 8 then finally moves the catch 6 into its main catch position, the pawl 7, which previously moved along the support surface 23 of the catch 6 in the direction of the main catch 29, now engages with the catch 6 by the catch hook 12 the pawl 7 engages in the main catch 29 of the rotary latch 6. When the closing lever 8 moves from the neutral position into the operating end position in the auxiliary locking mode of the motor vehicle lock 3, the actuating arm 28 of the closing lever 8 consequently engages on the actuating projection 27 of the rotary latch 6 and rotates the rotary latch 6 about its axis of rotation 10 into its main detent position. Only the The locking pin 21 of the immobilization lever 14 has not yet fallen into the radial recess 22 of the catch 6, which is due to the inertia of the immobilization lever 14. Because the locking pin 21 of the immobilization lever 14 only falls into the radial recess 22 of the rotary latch 6 when the rotary latch 6 in its main latching position and the pawl 7 in its locking position (see Figure 11 ) have arrived. The closing lever 8 is in Figure 11 arranged in an operating end position. In the operating end position, the closing lever 8 is no longer rotated by the drive element 5. Rather, the closing lever 8 is moved back into its neutral position (see Figure 12 ) when the rotary latch 6 is arranged in its main latching position and the pawl 7 in its blocking position. In Figure 12 the locking pin 21 of the immobilization lever 14 is now arranged in the radial recess 22 of the rotary latch 6, so that a rotary movement of the rotary latch 6 is blocked. In summary, the Figures 7 to 12 the auxiliary locking operation of the motor vehicle lock 3, in which the closing lever 8 transfers the catch 6 from the pre-latching position lying between the open position and the main latching position into its main latching position, the drive element 5 pulling the closing lever 8 out of the neutral position (see Figure 7 ) to the operating end position (see Figure 11 ) emotional. In the operating end position, the rotary latch 6 are arranged in their main latching position and the pawl 7 in their locking position. For the auxiliary locking operation, the evasive device 38 consequently has the evasive projection 30 formed on the closing lever 8 and the evasive pin 31 integrally formed on the immobilization lever 14. In the neutral position, the evasion lug 30 is spaced apart from the evasion pin 31, wherein when the pull lever 8 moves from the neutral position into the operating end position, the evasion lug 30 lies against the evasion pin 31 and the immobilization lever 14 about the pivot axis 15 in one of the Catch 6 pushes direction. According to the invention, the immobilization lever 14 is thus pivoted out by the closing lever 8 for the auxiliary locking operation and is held back by the rotary latch 6. Only when the closing lever 8 moves back into its neutral position is the immobilization lever 14 free to move and engages with its locking pin 21 in the radial recess 22 of the rotary latch 6 and blocks a rotary movement of the rotary latch 6.

In the Figures 13 to 21 A locking operation is shown, in which the flap 2 is thrown quickly and powerfully by an operator, so that the catch 6 extends beyond the main latching position into an overstroke position (see Figure 19 ) arrives and then moves back to its main resting position. The evasive device 38, which ensures that the immobilization lever 14 only engages with the rotary latch 6 when the rotary latch 6 is arranged in its main latching position and the pawl 7 in its blocking position, has that for the closing operation with reference to the axis of rotation 10 radially outwardly curved elevation surface 33. In the Figures 13 to 21 neither the pre-locking lever 16 nor the closing lever 8 are shown, since these two components play no role in the closing process described below. The Figure 13 shows a starting position for the closing process. In the starting position, the rotary latch 6 and the pawl 7 are disengaged and the rotary latch 6 is in a position lying between the open position and the main latching position. The latching hook 12 of the pawl 7 rests on the circular support surface 23 of the catch 6. The support surface 26 of the immobilization lever 14 bears against a circumferential section of the support pin 25 facing away from the catch 6. If the flap 2 is now thrown quickly and powerfully by a user, a locking bolt (not shown in the figures) enters the mouth of the catch 6 and ensures that the catch 6 moves in the direction of the catch Main stop position rotates counterclockwise about the axis of rotation 10. Such a situation is in Figure 14 shown, in which the catch 6 rotates in the direction of its main rest position. The latching hook 12 of the pawl 7 is still arranged on the circular support surface 23 and slides along it in the direction of the main catch 29 of the rotary latch 6. When the rotary latch 6 moves out of the in Figure 14 position shown in the in Figure 15 shown position, the pawl 7 is accelerated in a direction away from the catch 6. This acceleration of the pawl 7 results from the fact that the latching hook 12 of the pawl 7 is moved over the outwardly curved elevation surface 33, as a result of which the pawl 7 experiences a force which points away from the rotary latch 6 and which ensures the deflection of the pawl 7. In Figure 16 is an enlarged detail view of the Figure 15 shown, from which it can be seen that during the closing process of the locking hook 12 of the pawl 7 moves over the outwardly curved elevation surface 33. As a result of the acceleration of the pawl 7 in a direction pointing away from the rotary latch 6, the immobilization lever 14 is also moved away from the rotary latch 6, since the support pin 25 bears against the support surface 26 and thereby the immobilization lever 14 together with the pawl 7 from the rotary latch 6 be moved away. In the further course of the closing process, the rotary latch 6 then reaches its main latching position, as shown in FIG Figure 17 is shown. Due to the inertia of the pawl 7, the latching hook 12 does not yet come into engagement with the main catch 29, as is also the case in FIG Figure 18 can be seen, which is a detailed view of the Figure 17 shows. Rather, the rotary catch 6 rotates as a result of the rapid throwing of the flap 2 into one Figure 19 shown overtravel position, the pawl 7 now only comes into its locked position. Due to its higher mass, the pawl 7 moves back faster than the immobilization lever 14 in the direction of the catch 6. In the overstroke position, the locking pin 21 of the immobilization lever 14 is arranged lying between the radial recess 22 and the elevation surface 33 of the circular-arc-shaped support surface 23 of the rotary latch 6. The rotary latch 6, which is spring-loaded in the direction of its open position, rotates back to its main rest position after reaching the overtravel position, as is the case Figure 20 shows. The main catch 29 of the catch 6 comes into engagement with the locking hook 12 of the pawl 7, which is already arranged in its locked position. The motor vehicle lock 3 has thus reached its closed position and the flap 2 is locked. Only when the rotary latch 6 is arranged in its main latching position and the pawl 7 in its blocking position does the latching pin 21 of the immobilization lever 14 fall into the radial recess 22 of the rotary latch 6, so that the immobilization lever 14 blocks a rotary movement of the rotary latch 6. In summary, it should be noted that during the locking operation the rotary latch 6 moves as a result of a closing force caused by the operator or user over the pre-locking position and the main locking position into the overstroke position going beyond the main locking position, the pawl 7 having a greater mass than the immobilization lever 14 As a result of inertial forces, the elevation surface 33 urges and accelerates the pawl 7 in a direction pointing away from the rotary latch 6, so that the support surface 26 and the support pin 25 are arranged at a distance from one another at the latest in the overtravel position. According to the invention, the pawl 7 is arranged in the overtravel position of the rotary latch 6 in the locked position, the rotary latch 6 being spring-biased in the direction of its open position in such a way that the rotary latch 6 rotates from the overtravel position into the main latching position and in the main latching position with the pawl 7 is engaged. According to the invention, the high inertia and an acceleration jerk of the pawl 7 are in the locking operation used in the direction of their open position, so that only when the rotary latch 6 moves from the overstroke position back into the main latching position of the locking pin 21 of the immobilization lever 14 into the radial recess 22 of the rotary latch 6.

The invention described above is of course not limited to the described and illustrated embodiment. It can be seen that numerous modifications can be made to the embodiment shown in the drawing which are obvious to the person skilled in the art according to the intended application and which are defined by the appended claims.

Claims (12)

1. A motor vehicle lock (3) with a carrier element (9), a rotary latch (6) which is rotatably mounted on the carrier element (9), which rotary latch is movable from an open position into a main latching position, with a pawl (7) which is pivotably mounted on the carrier element (9), which pawl is movable into a locking position in engagement with the rotary latch (6) arranged in its main latching position, and which has a latching hook (12), and with an immobilization lever (14), which is pivotably mounted on the carrier element (9) into an immobilization position, in which the immobilization lever (14) blocks a rotary movement of the rotary latch (6) arranged in its main latching position,
   wherein an escape device (38), configured urging the immobilization lever (14) in a direction pointing away from the rotary latch (6) on a movement of the rotary latch (6) in the direction of its main latching position, and wherein the escape device (38) is coupled with the immobilization lever (14) in such a way that the immobilization lever (14) only pivots into its immobilization position when the rotary latch (6) is arranged in its main latching position and the pawl (7) is arranged in its locking position,
   characterized in that
   the rotary latch (6), rotatably mounted on a rotation axis (10), has an arcuate bearing surface (23), which is formed in a first radius (32) from the rotation axis (10), wherein in the arcuate bearing surface (23) a radial recess (22) is formed, into which a latching pin (21), formed on the immobilization lever (14), engages blocking a rotary movement of the rotary latch (6), when the immobilization lever (14) is arranged in its immobilization position.
2. The motor vehicle lock (3) according to Claim 1, characterized in that the pawl (7), pivotably mounted about a pawl axis (11), has a support pin (25) extending in an axial direction (24), which support pin is arranged between the pawl axis (11) and the latching hook (12), and on the immobilization lever (14) a support surface (26) is formed, wherein the support surface (26) lies on a circumferential portion of the support pin (25) facing away from the rotary latch (6), when the latching hook (12) of the pawl (7) is arranged resting on the arcuate bearing surface (23).
3. The motor vehicle lock (3) according to Claim 2, characterized in that a closing lever (8) is pivotably mounted about a lever axis (20) on the carrier element (9), wherein in a closing aid operation of the motor vehicle lock (3), transferring the rotary latch (6) from a pre-latching position, lying between the open position and the main latching position, into its main latching position, a drive element (5) moves the closing lever (8) from a neutral position into an operation end position, and wherein in the operation end position the rotary latch (6) is arranged in its main latching position and the pawl (7) is arranged in its locking position.
4. The motor vehicle lock (3) according to Claim 3, characterized in that the rotary latch (6) has a radially extending actuation projection (27), and the closing lever (8) is formed with an actuation arm (28), wherein in the neutral position the actuation projection (27) and the actuation arm (28) are arranged spaced apart from one another, wherein the actuation arm (28) in the closing aid operation of the motor vehicle lock (3), on the movement of the closing lever (8) from the neutral position into the operation end position, is configured engaging on the actuation projection (27) and the rotary latch (6) is configured rotating about the rotation axis (10) into its main latching position.
5. The motor vehicle lock (3) according to Claim 3, characterized in that the escape device (38) has an escape projection (30), formed on the closing lever (8), and an escape pin (31), formed on the immobilization lever (14) which is pivotably mounted about a pivot axis (15), wherein in the neutral position the escape projection (30) is arranged spaced apart from the escape pin (31), and wherein on a movement of the closing lever (8) from the neutral position into the operation end position the escape projection (30) is arranged lying against the escape pin (31) and is configured urging the immobilization lever (14) about the pivot axis (15) in a direction pointing away from the rotary latch (6).
6. The motor vehicle lock (3) according to Claim 2, characterized in that at one end of the arcuate bearing surface (23) of the rotary latch (6), a main catch (29) is formed, which is in engagement with the latching hook (12) formed on the pawl (7), when the rotary latch (6) is arranged in its main latching position and the pawl (7) is arranged in its locking position, wherein the escape device (38) has a radially outwardly curved elevation surface (33) with respect to the rotation axis (10), which elevation surface is arranged between the radial recess (22) and the main catch (29), and which extends from the arcuate bearing surface (23).
7. The motor vehicle lock (3) according to Claim 6, characterized in that the elevation surface (33) extends with a second radius (34) from the bearing surface (23) with respect to the rotation axis (10), wherein the difference formed between the second radius (34) and the first radius (32) is at least 1.5 % and at most 10 % with respect to the first radius (32).
8. The motor vehicle lock (3) according to Claim 6, characterized in that the arcuate bearing surface (23) extends over a circular arc portion (35) which is defined by an associated central angle (36) in relation to the rotation axis (10), which central angle lies between 10 % and 25 % with respect to a centre angle (37) on the bearing surface (23).
9. The motor vehicle lock (3) according to Claim 6, characterized in that in a closing operation as a result of a closing force brought about by an operator, the rotary latch (6) moves via the pre-latching position and the main latching position into an overtravel position beyond the main latching position, wherein the pawl (7) has a greater mass than the immobilization level (14).
10. The motor vehicle lock (3) according to Claim 9, characterized in that as a result of inertial forces on the closing operation, the elevation surface (33) urges the pawl (7) in an accelerated manner in a direction pointing away from the rotary latch (6), in such a way that at the latest in the overtravel position the support surface (26) and the support pin (25) are arranged spaced apart from one another.
11. The motor vehicle lock (3) according to Claim 10, characterized in that the pawl (7) is arranged in the locking position in the overtravel position of the rotary latch (6), wherein the rotary latch (6) is spring-loaded in the direction of its open position, in such a way that the rotary latch (6) rotates from the overtravel position into the main latching position and in the main latching position is in engagement with the pawl (7).
12. The motor vehicle lock (3) according to Claim 11, characterized in that in the overtravel position the latching pin (21) of the immobilization lever (14) is arranged resting between the radial recess (22) and the elevation surface (33) on the arcuate bearing surface (23) of the rotary latch (6).

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