DE102013209084A1 - Motor vehicle door lock with prevented occlusion - Google Patents

Abstract

Motor vehicle door lock (1) with a locking mechanism (2, 3, 4) comprising a rotary latch (2) and at least one pawl (3) for locking the rotary latch (2) and with a blocking lever (4) for blocking the pawl (3) in the locked position, whereby an effective blocking of the pawl (3) by the blocking lever (4) is controlled depending on the closed position of the rotary latch (2) during the closing movement. The invention ensures that in motor vehicle door locks with an opening locking moment and consequently the need for a blocking lever to block the pawl, at least in the main detent position, a secure closing position is reached even with extreme manipulations and a so-called false closure is thus avoided.

Description

The invention relates to a motor vehicle door lock with a locking mechanism of a catch and at least one pawl for locking the catch and with a blocking lever for blocking the pawl in the latched position.

A motor vehicle door lock, also known as a lock or lock unit for a motor vehicle, comprises a locking mechanism with a rotatably mounted rotary latch for receiving a locking bolt which is generally arranged on the body of the motor vehicle and which is often also called a lock holder or lock bracket. The locking mechanism further has a pawl with which the catch can be latched for holding the locking bolt.

The catch of a motor vehicle lock usually has a bifurcated inlet slot (also called inlet mouth) formed by a load arm and a catching arm into which the locking bolt of a vehicle door or flap, for example the bonnet or trunk lid, arrives when the door or flap is closed. The locking pin then rotates the catch from an open position in the direction of the closed position until the pawl locks the catch, the latch bolt can not then leave the inlet slot of the catch.

In recent years, locks for motor vehicles have been established in which the catch is able to initiate an opening moment in the pawl by appropriate design of the latching surface when it is in its latching position, ie the catch causes an opening moment with respect to the pawl. In such a lock, a blocking lever or blocking lever is absolutely necessary for blocking the pawl in the latching position. Such, for example from the DE 10 2007 003 948 A1 known motor vehicle locks are characterized by a particularly high operating comfort, in particular by opening with little effort.

That in the DE 10 2007 003 948 A1 described motor vehicle lock has a rotary latch, a first pawl with a pawl rotation axis and a blocking lever, wherein the rotary latch in a locked state of the lock unit initiates a pivoting moment in the first pawl. In the locked state, the first pawl is blocked by means of the blocking lever and thus fixed their position. Furthermore, there is provided a second pawl which is mounted on the pawl rotation axis. In this lock unit, the first pawl forms a so-called main catch pawl, while the second pawl is a so-called pre-catch pawl. The catch can first be latched in a pre-latching position and by turning further towards the closed position in a main latching position. An actuation of the lock unit, ie unlatching, via the second pawl, which pivots the blocking lever during the opening process, so that the catch independently moves the first pawl out of its detent position as soon as the blockade is lifted.

From the DE 10 2008 061 524 A1 , from which the invention proceeds, a motor vehicle door lock with a catch, a pawl for locking the catch and a blocking lever for the pawl is known. Also in this lock unit, the catch causes an opening moment with respect to the pawl, but the lock positions Vorrast and Haupastast be accomplished only via a locking lever equipped with a pawl, so that subsequently in the lock unit after DE 10 2007 003 948 A1 Used second pawl can be dispensed with.

Such lock units with an opening moment introduced by the catch for the ratchet locking of the catch and pawl have proven themselves and are characterized in particular by a very high operating comfort and a very low noise level.

Nevertheless, one strives to improve these proven lock units with an opening moment on. In particular, it must be ensured that even at extreme, for example, very slow closing speeds of the corresponding door or flap of a motor vehicle, a secure locking of the locking mechanism from catch and pawl takes place. If a pawl, into which an opening moment is initiated, is not properly blocked in its latching position, the latch is only apparently latched. There is a sham closing.

Shut-off includes that the pawl does not fully invade the main door position of the catch at a low speed closing movement of the corresponding door or flap of the motor vehicle and the blocking lever does not or insufficiently engages with the pawl and can not safely block them.

It is an object of the invention to reliably avoid a bogus closure.

The object is achieved with a motor vehicle door lock with the features of claim 1. Further advantageous embodiments of the invention are specified in the dependent formulated claims.

It should be noted that the listed in the dependent formulated claims and the features mentioned above can be combined in any way with each other and define further embodiments of the invention. In addition, the features specified in the claims are specified and explained in more detail in the description, wherein further preferred embodiments of the invention are shown.

The motor vehicle door lock according to the invention comprises a locking mechanism with a catch and at least one pawl for locking the catch and a blocking lever for blocking the pawl in the latched position, wherein effectively blocking the pawl by the blocking lever in response to the closing position of the catch in the Closing movement is controlled. By controlling the invention is to be achieved that the blocking lever is prevented from blocking the pawl until the catch is in the closing movement in a safe closed position and the preferably spring-loaded pawl in a preferably free movement as possible completely in the latching area of the catch can come up. Only after the catch has safely reached the closed position and thus allows a safe collapse of the pawl in its rest position, the blocking lever is released for blocking the sunken pawl.

Preferably, it is provided in the motor vehicle door lock that blocking of the pawl is controlled by the blocking lever on the catch during the closing movement so that the blocking of the pawl is delayed until the catch reaches at least the main catch position for locking with the pawl and preferably exceeded. The preferably spring-loaded pawl can then completely in a free, unhindered or at least as unhindered movement in the catch region of the catch reach and that in particular when the catch has exceeded its main rest position. Only after the catch has safely reached the closed position or even exceeded, is released by the inventive control of the blocking lever for blocking the pawl. A prior release of the blocking lever is safely prevented.

Preferably, it is therefore provided in the motor vehicle door lock that an effective blocking of the pawl is delayed by the blocking lever on the catch until the catch has reached a so-called overstroke position in the closing movement. Over-stroke position of the catch means in connection with the invention beyond the main catch position further closing movement of the catch, whereby temporarily additionally a safety distance between the main catch position of the catch and the pawl is created and so in all respects safe free collapse is preferably ensured in the direction of detent spring-loaded pawl in the main detent position, before then the release of the blocking lever to block the pawl takes place. In general, the catch is pivoted to take the overstroke position beyond the main rest position out so that temporarily a distance of about 1-3 mm between the main catch position of the catch and the incidence area of the pawl is generated. This Überhubbereich or the overstroke is canceled after the collapse of the pawl and the return of preferably spring-loaded in the opening direction of the catch for safe locking with the pawl.

Preferably, it is provided in the motor vehicle door lock that effective blocking of the pawl is controlled by the blocking lever via the rotary latch in the closing movement via a mechanical connection between the rotary latch and the blocking lever. As a result, a tolerance-free control of the movement of the blocking lever is ensured.

Preferably, it is provided in the motor vehicle door lock that provided for controlling the blocking lever mechanical connection between the rotary latch and the blocking lever is provided via a control lever, wherein a separate storage of the control lever as a pivot lever between the catch and the blocking lever in the lock housing also with respect Installation together with the locking has proven to be particularly advantageous. The control lever controls the blocking lever in the aforementioned sense and thus avoids a bogus closure.

An embodiment of the motor vehicle door lock comprises that the control lever is embodied in one piece as a pivoting lever with two arms, wherein the arms are arranged rotatably and preferably approximately at right angles to one another starting from the control lever pivot axis and / or a lever arm with a flat arm arranged on the rotary latch surface. Cams in free relative movement corresponds and / or the other lever arm is preferably connected via a rectangular incision at the end of the lever form-locking with the blocking lever in the blocking position or can be. However, instead of a two-armed lever, for example, an embodiment for controlling the pawl blockade may be provided, in which a cylindrical element is placed in the region between the blocking lever and the rotary latch is then, in which case via appropriate undercuts u / o increases the mechanical connections with the catch on the one hand and the blocking lever on the other hand are made for the delayed collapse of the blocking lever.

In the context of the invention it can also be provided that the mechanical connection between the rotary latch and the blocking lever is produced via a lever arm arranged directly on the blocking lever u / o via a lever arm arranged on the rotary latch.

According to a further preferred embodiment of the motor vehicle door lock according to the invention, it is provided that an effective blocking of the pawl by the blocking lever in response to the closing position of the rotary latch during the closing movement via an electrical connection to a sensor, a release element for the blocking lever and a switch for the release element is controlled.

Preferably, it is provided for this purpose, instead of a mechanical connection between the rotary latch and the blocking lever, an electrical connection via a position sensor for detecting the rotary latch position during the closing movement, a preferably spring-loaded release element on the blocking lever and acted upon by the position sensor release switch on the Establish release element. In this case, a so-called Hall sensor has proven itself as a position sensor and as a release element, a spring-loaded solenoid with a pin-like lifting element on which a micro-switch acted upon by the Hall sensor is mounted.

Preferably, the motor vehicle door lock is designed so that the locking mechanism of the rotary latch, at least one pawl and a blocking lever is arranged in a lock housing. As a result, a compact, in particular protected arrangement of the locking mechanism is achieved.

In the following the invention will be explained in more detail with reference to an embodiment in two figures. The figures schematically show the motor vehicle door lock according to the invention as follows:

1 : Motor vehicle door lock in the closing movement of the rotary latch just before reaching the locking position and

2 : Motor vehicle door lock after 1 with locked locking mechanism.

In the 1 is a detail of a motor vehicle door lock 1 with a pawl 3 for the rest position 2a the catch 2 and with a blockage lever 4 for the pawl 3 shown. The locking mechanism 2 . 3 . 4 has one on an axis 12 rotatably mounted rotary latch 2 , one on an axis 13 rotatably mounted pawl 3 for locking the catch 2 and one on an axis 14 rotatably mounted blocking lever 4 for blocking the pawl 3 on. The pawl 3 is counter-clockwise spring loaded in the direction of detent position. The catch 2 leads in the locking position shown an opening moment in the pawl 3 one. It is a blockage lever 4 for blocking the pawl 3 provided, if this, as in the 2 shown, has fallen completely into its rest position.

Between the blockage lever 4 and the catch 2 is a control lever 5 as on an axis 15 mounted pivot lever 5 arranged. The locking mechanism 2 . 3 . 4 and the pivot lever 5 are about correspondingly common bearing mandrels on the base plate of the lock housing 20 arranged. Only for the sake of completeness it should be mentioned at this point that the thus equipped lock housing 20 is covered after the assembly usually for secure sealing of a lock cover, not shown here. The swivel lever 5 is made up of approximately at right angles, rotatably to each other arranged lever arms 5a and 5b together. The lever arm 5a is based on the pivot lever axis 15 with a molded at the end of the lever, preferably approximately rectangular recess 7 Mistake. The recess 7 can do the blockage arm 4b of the blockage lever 4 , like in the 1 shown to capture a movement of the blockage lever 4 to prevent his blocking position. A movement of the pivoting lever 5 is over the lever arm 5b and one on the catch 2 arranged flat cam 6 or protruding bolt controlled.

The catch 2 is used to exercise the specified by an arrow closing movement of a arranged on the corresponding motor vehicle, not shown here lock holder by retracting into the rotary latch slot 8th driven. In the 1 is the catch 2 just before her rest position, then in the direction of the catch 2 spring-loaded pawl 3 free under the rotary latch system at 2a according to 2 incident. After the collapse of the pawl 3 in this position 2a it requires a blockage of the pawl 3 in the sunken position, as the catch 2 an opening moment on the pawl 3 exercises. For this purpose is the clockwise direction and thus in Blockaderichtung spring loaded locking lever 4 available in the position shown in 1 still from the lever arm 5a the control lever according to the invention 5 is prevented from further movement.

The control of the blocking lever movement 4 done so that when the of the Lock holder driven rotary latch 2 moved further in the direction of the arrow, the lever arm 5b of the control lever 5 in a clockwise direction through the system of the cam 6 on the rotary latch 2 Moved in a clockwise direction and the rotation with the lever arm 5b connected lever arm 5a of the control lever 5 from the blockage position of the blocking lever 4 is removed, whereby the spring-loaded in the clockwise direction blocking lever 4 can just move in this clockwise direction and the Blockadehebelarm 4a under the lever arm 3a in the meantime by the further movement of the catch 2 free in the main-load position 2a sunken pawl 3 can proceed.

2 shows the motor vehicle door lock 1 with the as under above 1 described freely under the rotary latch system at 2a sunken pawl 3 After the catch has moved further in the direction of arrow towards the closed position. catch 2 and pawl 3 are locked together.

Like also under 1 is described in the further movement of the catch 2 in the direction of the arrow, the lever arm 5b of the control lever 5 in a clockwise direction through the system of the cam 6 on the rotary latch 2 moved and the rotation with the lever arm 5b connected lever arm 5a of the control lever 5 is from the blockage position of the blocking lever 4 removed, causing the spring-loaded in the clockwise direction blocking lever 4 can also move in this clockwise direction. The blocking lever arm 4a then can the lever arm 3a the sunken pawl 3 - as shown - block. The control lever 5 is then with his lever arm 5a out of engagement with the Blockadehebelarm 4b of the blockage lever 4 ,

This is a reliably blocked even in the high loads in driving a motor vehicle locking the locking 2 . 3 . 4 out of a rotary latch 2 , Pawl 3 and blockage lever 4 produced.

To operate the locking mechanism 2 . 3 . 4 is a trigger 10 provided, on the opening requirement of the locking mechanism 2 . 3 . 4 starting from a not shown in the figures inside door handle or outside door handle the blocking lever 4 over the lever arm 4c pivoted in the counterclockwise direction and the pawl 3 then by the opening moment of the catch 2 is pivoted out of the latching, whereby finally the spring-loaded rotary latch 2 can pivot in its open position against the direction of the arrow. It can be seen that in this opening movement of the rotary latch of the counter-clockwise spring-loaded control lever 5 is pivoted in this counterclockwise direction and the blocking lever 4 again blocked until the lever arm 5b of the control lever 5 during the closing movement of the rotary latch 2 again from the cam 6 on the rotary latch 2 , as described above.

In addition to the locking position shown, a further pre-locking position may be provided, for example, analogous to that of the DE 10 2009 029 041 A1 known way.

LIST OF REFERENCE NUMBERS

1

Motor vehicle door lock

2

catch

2a

detent position

3

pawl

3a

Blockage arm pawl

4

blocking lever

4a

Blockade lever arm Blockage lever

4b

Blockade lever arm control lever

4c

Release arm Blockage lever

5

control lever

5a

Control lever arm catch

5b

Control lever arm Blockade lever

6

Rotating-cam

7

Lever arm recess

8th

Castle Holder inlet slot

10

sear

12

Rotary latch axis

13

Pawl axis

14

Blocking lever axis

15

Control lever axis

20

lock housing

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007003948 A1 [0004, 0005, 0006]
• DE 102008061524 A1 [0006]
• DE 102009029041 A1 [0034]

Claims (10)

Motor vehicle door lock ( 1 ) with a locking mechanism ( 2 . 3 . 4 ) comprising a catch ( 2 ) and at least one pawl ( 3 ) for a locking of the catch ( 2 ) as well as with a blocking lever ( 4 ) for blocking the pawl ( 3 ) in the locked position, wherein an effective blocking of the pawl ( 3 ) through the blocking lever ( 4 ) in dependence on the closing position of the rotary latch ( 2 ) is controlled by a controller during the closing movement. Motor vehicle door lock ( 1 ) Claim 1, characterized in that the control is such that an effective blocking of the pawl ( 3 ) through the blocking lever ( 4 ) over the catch ( 2 ) is controlled during the closing movement so that the blocking of the pawl ( 3 ) is delayed until the catch ( 2 ) at least the main-load position ( 2a ) has reached. Motor vehicle door lock ( 1 ) according to claim 1, characterized in that the control is such that an effective blocking of the pawl ( 3 ) through the blocking lever ( 4 ) over the catch ( 2 ) is delayed until the catch ( 2 ) has reached an overstroke position in the closing movement. Motor vehicle door lock ( 1 ) according to one of the preceding claims, characterized in that an effective blocking of the pawl ( 3 ) through the blocking lever ( 4 ) over the catch ( 2 ) during the closing movement via a mechanical connection ( 5 ) between the catch ( 2 ) and the blocking lever ( 4 ) is controlled. Motor vehicle door lock ( 1 ) according to the preceding claim, characterized in that the mechanical connection ( 5 ) between the catch ( 2 ) and the blocking lever ( 4 ) over one with the catch ( 2 ) and the blocking lever ( 4 ) operatively connected control levers ( 5 ) is made. Motor vehicle door lock ( 1 ) according to the preceding claim, characterized in that the control lever ( 5 ) as a separately mounted pivoting lever ( 5 ) between the catch ( 2 ) and the blocking lever ( 4 ) in the lock housing ( 20 ) is arranged. Motor vehicle door lock ( 1 ) according to claim 6, characterized in that the pivot lever ( 5 ) as a two-armed lever ( 5a . 5b ) and / or with a rotary lobe cam ( 6 ) corresponding lever arm ( 5a ) and / or with a preferably positive fit to the blocking lever ( 4 ) engaging lever arm ( 5b ) is executed. Motor vehicle door lock ( 1 ) according to any one of claims 1-3, characterized in that an effective blocking of the pawl ( 3 ) through the blocking lever ( 4 ) over the catch ( 2 ) during the closing movement via an electrical connection to a sensor, a release element for the blocking lever ( 4 ) and a release switch is made. Motor vehicle door lock ( 1 ) according to the preceding claim, characterized in that the electrical connection with a position sensor for the rotary latch ( 2 ), a release element on the blocking lever ( 4 ) and a release switch acted upon by the position sensor on the release element. Motor vehicle door lock ( 1 ) according to claim 1, characterized in that the locking mechanism ( 2 . 3 . 4 ) from catch ( 2 ), at least one pawl ( 3 ) and a blocking lever ( 4 ) in a lock housing ( 20 ) is arranged.

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