EP0722029A2 - Motor vehicle door lock with rotational centrally controlled locking system - Google Patents

Abstract

The invention relates to a motor vehicle door lock with locking elements such as a rotary latch and pawl, with a lock mechanism (1) and with a central locking drive (2), in which the central locking drive (2) is a drive motor (3), one of the drive motor (3), preferably by means of a Worm gear (4) rotatably driven rotor (5) and a rotor arranged on the rotor (5) in an unlocking position (E), a securing position (S) and, preferably, an anti-theft position (D), possibly also in a neutral position (N) has an actuatable part, in which the locking mechanism (1) in any case has an inner opening lever (7), an outer opening lever and further levers and a central locking lever (11) which can be adjusted by the actuating part (6). So that a blocking of the rotor of the central locking drive does not lead to permanent blocking in the securing position or in the anti-theft position, it is provided that the actuating part (6) on the rotor (5) is movable radially to the rotor (5), in particular is mounted displaceably and is spring-loaded radially outwards and thus, when the central locking drive (2) is blocked, two can be deflected radially in an intermediate position with sufficient force and allows the door lock to be unlocked or unlocked. <IMAGE>

Description

The invention relates to a motor vehicle door lock with the features of the preamble of claim 1.

Motor vehicle door locks of the type in question are known in various embodiments. The motor vehicle door lock from which the invention is based (US Pat. No. 5,240,296) has a central locking drive with a drive motor and a rotor which is driven in rotation by the drive motor by means of a worm gear. On the rotor there is an actuating part projecting as a pin, which sits on the outer circumference of the rotor and thus rotates very eccentrically. The actuating part can be brought into an unlocking position and a securing position and into a neutral position lying exactly in between by means of the rotor.

The actuating part interacts with a central locking lever of the lock mechanism, which is mounted on an axis parallel to the axis of rotation of the rotor and has an otherwise T-shaped cutout with the narrow web directed radially outward. The unlocking position and the securing position of the actuating part are located in the web area of the cutout in approximately diametrically opposite positions. The actuating part thus swings the central locking lever back and forth about its axis between the unlocking position and the securing position. This pivoting movement then acts on the other levers in the lock mechanism.

In the previously described known motor vehicle door lock, the actuating part normally assumes the neutral position lying in the middle between the securing position and the unlocking position, which lies in the transverse region of the T-shaped cutout, after a securing process or unlocking process. In this neutral position, the pivoting movement of the central locking lever between the locked position and the unlocked position is not hindered.

An anti-theft position can be achieved in the previously described motor vehicle door lock in that the rotor moves the actuating part into the secured position and the drive motor switches off there. Now the actuating part is locked in the locked position, blocking the central locking lever, pulling on the inner locking lever or on the inner opening lever also realizing the inner locking mechanism cannot lead to unlocking the door lock.

So that the lever mechanism of the lock mechanism in this construction, in which the central locking lever is blocked in the anti-theft position, is not damaged, a clutch spring can be arranged on the one hand and the central locking lever on the other hand, between the inner locking lever or the inner locking lever realizing the inner locking. This clutch spring normally takes one lever with it when the other lever is mechanically actuated, but when the other lever is blocked, it allows one lever to move against the spring force. If in the previously described motor vehicle door lock the central locking drive is blocked in the anti-theft position or in any other intermediate position for whatever reason, the central locking lever cannot be moved; it is correspondingly permanently blocked. A repair in the workshop is essential. Even worse, without special additional measures, emergency unlocking or emergency unlocking of the motor vehicle door lock cannot be achieved either via the external locking lever to be operated from the door lock. Rather, an additional power chain must be created from the outside safety lever directly to the pawl of the motor vehicle door lock.

The invention has for its object to design a motor vehicle door lock of the type in question so that blocking the rotor of the central locking drive does not lead to permanent blocking in the security position or in the anti-theft position.

The object presented above is achieved in a motor vehicle door lock with the features of the preamble of claim 1 by the features of the characterizing part of claim 1. Preferred refinements and developments are the subject of the dependent claims.

According to the invention, it has been recognized that a deflection of the actuating part on the rotor in the radial direction to the rotor is the correct means to obtain the required degree of freedom for an emergency release when the central locking drive is blocked. In a very simple manner, the spring force of the actuating part can be used to predefine the defined spring force radially outwards, against which an emergency release, in particular from the external securing lever, is possible if necessary.

In particular, an actuating part slidably mounted in a guide in the radial direction of the rotor is very easy to implement. But also an elastically evasive, ie inherently resilient actuating part can be an alternative if it is ensured that the required actuating forces can be transmitted to the levers in the circumferential direction.

Fig. 1

in Entsicherungsstellung,

Fig. 2

in Sicherungsstellung,

Fig. 3

in Sicherungsstellung, diebstahlgesichert, und

Fig. 4

im Übergang von der Diebstahlsicherungsstellung im Wege der Not entriegelung in die Entsicherungs- und Öffnungsstellung.

In the following, the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment. The drawing shows the lock mechanism with the central locking drive of a motor vehicle door lock according to the invention in

Fig. 1

in the unlocked position,

Fig. 2

in securing position,

Fig. 3

in security position, secured against theft, and

Fig. 4

in the transition from the anti-theft position by means of emergency unlocking to the unlocking and opening position.

The basic structure of the motor vehicle door lock is first explained with reference to FIG. 1. It is a motor vehicle door lock with conventional locking elements such as a rotary latch and pawl, which are not shown here. A lock mechanism 1 and a central locking drive 2 can be seen. The central locking drive 2 has a drive motor 3 and a rotor 5 driven by the drive motor 3 here and according to preferred teaching by means of a worm gear 4. The rotor 5 itself forms the worm wheel of the worm gear 4 with its external toothing. An actuating part 6, which has the shape of a projecting pin, is arranged on the rotor 5.

In Fig. 1 it is shown that the rotor 5 is rotated clockwise into the locking position and counterclockwise into the unlocking position. Abbreviations indicate the various positions that the actuating part 6 can assume when the rotor 5 rotates, namely firstly an unlocking position E and a locking position S.

In the illustrated and preferred embodiment, the rotor 5 can also bring the actuating part 6 into a neutral position N. In the exemplary embodiment shown, this applies so that the rotor 5 returns the actuating part 6 to the neutral position N by rotation after each actuation. Each activation of the central locking drive 2 thus leads to a rotary movement of the rotor 5 with the actuating part 6 starting from the neutral position N.

The above-described mode of operation is not mandatory, the teaching of the invention can in principle also be advantageously used in a construction of the central locking drive 2 in which the rotor 5 does not return the actuating part 6 to the neutral position N. On the contrary, the teaching of the invention applies even more comprehensively. However, this is the rarer drive variant these days.

It is essential that motor vehicle door locks of the type in question can also have a so-called anti-theft function. In the anti-theft position, such a motor vehicle door lock is secured in such a way that even pulling on the inside opening lever or on the inside locking lever does not unlock or open the door lock. The anti-theft device can only be released by actuating the door lock cylinder itself. In the illustrated embodiment, the motor vehicle door lock is also equipped with an anti-theft function, namely in that the actuating part 6 can also be brought into an anti-theft position D or into an anti-theft position DE which deactivates the anti-theft device. The position of the different positions of the actuating part 6 on the circular arc shown in FIG. 1 makes it clear that when the rotor 5 is locked, the securing position S is first reached, and then the anti-theft position D is reached. Starting from the neutral position N, the anti-theft unlocking position DE and then the unlocking position E, in which the central locking unlocks, are reached.

1 shows the lock mechanism 1, which in any case has an inner opening lever 7 on which, in the exemplary embodiment shown, a Bowden cable 8 engages leading to the inner opening handle. Also provided is an outer opening lever, not shown here, which in turn can also attack the inner opening lever 7 again.

In the illustrated embodiment, but not necessarily provided, for example not on the rear side doors of motor vehicles, there is an external locking lever 9 to be actuated from a door lock cylinder. In the illustrated embodiment, this external lock lever 9 is present and with a drive nut 10 that can be rotated from the door lock cylinder via driving pins and Elongated hole coupled in the usual way. The nut 10 again represents a rotor.

Finally, there is provided a central locking lever 11 which can be adjusted by the actuating part 6 and which ultimately brings about the unlocking or securing of the motor vehicle door lock in the lock mechanism 1.

In the illustrated embodiment of a motor vehicle door lock with anti-theft function, the lock mechanism 1 also includes an anti-theft lever 12 which can be adjusted by the actuating part 6. In addition, a power transmission lever 13 and an intermediate lever 14 are also provided, both with a driving pin 15 of a pawl, which is not shown. are coupled or can be. A connecting lever 16 is also provided between the central locking lever 11 and the external locking lever 9.

How the individual levers of the lock mechanism 1 interact in the preferred exemplary embodiment explained above is explained below in connection.

It is now essential for the invention that the actuating part 6 on the rotor 5 is movable radially to the rotor 5, in particular is mounted displaceably and is spring-loaded radially outwards and can thus be deflected radially when the central locking drive 2 is blocked in an intermediate position with sufficient force, and unlocking or unlocking the door lock allowed. In the exemplary embodiment shown, this is indicated by the double arrow in FIG. 1 on the actuating part 6. If, for example, the rotor 5 with the actuating part 6 remains unexpectedly in the anti-theft position D, it can be pushed back radially by the anti-theft lever 12 towards the axis of rotation of the rotor 5. This changes the angular relationships of the different parts to one another and a mechanical reverse rotation of the rotor 5 becomes possible. Even without reverse rotation, the door lock can be unlocked or unlocked (opened) with the appropriate spring travel.

In the illustrated embodiment, according to the explanation given above, a neutral position N is provided for the actuating part 6 of the rotor 5, into which this rotor 5 normally always returns.

The illustrated embodiment also makes it clear that the central locking lever 11 and / or the anti-theft lever 12, in the illustrated embodiment both levers, are mounted on an axis 17 parallel to the axis of rotation of the rotor 5, specifically in this embodiment. The central locking lever 11 and / or the anti-theft lever 12, both levers in the exemplary embodiment shown, are each U-shaped, wherein one leg 18 or 19 or 20 or 21 of the U projects with a control edge into the movement path of the actuating part 6, during the other legs 19 or 18 or 21 or 20 of the U with a leading edge on the edge of the movement path of the actuating part 6. In Fig. 1, the control edge 22 on the left leg 18 of the central locking lever 11 and the guide edge 23 are drawn with reference numerals, the other edges are not identified with reference numerals, since otherwise the drawing would be too confusing.

In the illustrated embodiment, it is provided that each leg 18, 19, 20, 21 has a control edge 22 and a subsequent leading edge 23. It is realized according to preferred teaching that the guide edge 23 extends orthogonally to the radius direction of the rotor 5 in the position on the edge of the movement path of the actuating part 6. The actuating part 6 is rounded in the illustrated embodiment at the outwardly projecting end. A pivoting of a lever 11 or 12 about the common axis 17 first presses the actuating part 6 radially back. The angular position of the guide edge 23 changes in relation to the outer, rounded end of the actuating part 6 and a tangentially directed force component on the rotor 5 results, which can cause the rotor 5 to be reset.

In the exemplary embodiment shown, the control edges 23 of the legs 18, 19, 20, 21 are designed such that they have an incline which is adapted to the force effect of the actuating part 6 upon impact in the circumferential direction. This slope can be quite different, since different force effects may be required.

The description of the door lock is complete in that it is pointed out that in the exemplary embodiment shown, the external locking lever 9 has an actuating nose 24 which, when the anti-theft lever 12 is in the anti-theft position, brings the anti-theft lever 12 into the anti-theft position during the unlocking movement. It can also be seen that the inner opening lever 7 is switched to freewheel when the anti-theft position is reached.

Fig. 1 shows the door lock in the unlocked position. When the central locking drive 1 is in working order, the rotor 5 with the actuating part 6 is in neutral position N. A pull on the inner opening lever 7 by means of the Bowden cable 8 or by means of a force effect from the outer opening lever moves the driving pin in the slot of the central locking lever 11 in FIG. 1 to the left and swivels thereby the power transmission lever 13 counterclockwise about the common pivot axis 25. The driver pin 15 of the pawl, not shown, is taken along and runs downward in the arcuate slot of the external securing lever 9, so that the pawl is lifted out of the catch.

If the central locking drive 1 is switched on so that the rotor 5 rotates clockwise, that is to say in the securing direction, the actuating part 6 abuts the control edge 22 on the left leg 18 of the central locking lever 11 and swivels it counterclockwise about the axis 17 dodges the leg 18 and leaves the movement path of the actuating part 6 so that it can reach the securing position S, while the opposite leg 19 swings into the movement path and lies there with its control edge. At the same time, the external securing lever 9 in FIG. 1 is taken to the right via the connecting lever 16 and rotates the nut 10 clockwise into the securing position. The driver pin 15 is in the slot of the power transmission lever 13 moved so far that it comes to rest on the right in the tubular extension. The securing position thus achieved is shown in Fig. 2.

The position shown in Fig. 2 can also be achieved by mechanical actuation of the door lock cylinder, ie the nut 10. If, in this securing position, FIG. 2, the Bowden cable 8 is pulled, unlocking, that is to say a return to FIG. 1, is possible in that the power transmission lever 13 presses with its transmission surface, which can be seen on the left, onto the mating surface of the central locking lever 11 and there pivots back about the axis 17 clockwise into the unlocking position from FIG. 1. Of course, this initially assumes that the rotor 5 with the actuating part 6 has returned to the neutral position N. Otherwise, the overload function of the actuating part 6 must occur.

Fig. 3 shows the anti-theft position of the motor vehicle door lock according to the invention. Here the rotor 5 with the actuating part 6 has been pivoted into the anti-theft position D of the actuating part 6. This is shown in the anti-theft position D, normally it naturally returns to the neutral position N. It can be seen that the anti-theft lever 12 is now pivoted into the movement path of the actuating part 6, the central locking lever 11 and the actuating lever 12 now have their right legs 19, 21 projecting into the movement path.

As a result of the anti-theft lever 12 being pivoted clockwise about the axis 17, the driver pin has been displaced upward toward the inner opening lever 7 in the region of the curved elongated hole in the inner opening lever 7. If the Bowden cable 8 is now pulled, the inner opening lever 7 performs an idle stroke off, so it is switched to freewheel. Pulling the inside opening handle has no effect in the lock mechanism 1. Of course, pulling the outside opening handle does not, either, but this applies to the locking position according to FIG. 2.

In the illustrated embodiment, it can also be seen that, in the anti-theft position, the central locking lever 11 is also decoupled from the external locking lever 9, namely in that the driver pin on the left end of the connecting lever 16 through the anti-theft lever 12 down into the Area of the transverse slot in the outer locking lever 9 has been pressed. A movement of the central locking lever 11 moves the driver pin in the slot without function.

If, however, the anti-theft position shown in FIG. 3 is actuated by the door lock cylinder from the external locking lever 9 via the nut 10 in the unlocking direction, that is to say rotating clockwise, the function shown in FIG. 4 takes place. The external locking lever 9 is shifted from FIG. 3 again to the left. The actuating nose 24 strikes an inclined control edge on the underside of the anti-theft lever 12. This is pivoted clockwise about the axis 17. The central locking lever 11 is also pivoted clockwise about the axis 17 via the connecting lever 16. The unlocking position shown in Fig. 4 is reached again.

It is interesting in all cases that, in an emergency, the actuating part 6 can retreat radially against spring force, represented by the double arrow in FIG. 1, on the rotor 5 and an emergency unlocking is possible at any time, even if the central locking drive 1 should block.

Claims (10)

Motor vehicle door lock with locking elements (1) such as a rotary latch and pawl, with a lock mechanism (1) and with a central locking drive (2), in which the central locking drive (2) is a drive motor (3), one of the drive motor (3), preferably by means of a worm gear (4) rotatingly driven rotor (5) and a rotor (5) arranged in an unlocking position (E), a securing position (S) and, preferably, an anti-theft position (D), possibly also in a neutral position (N) Actuating part (6), in which the locking mechanism (1) in any case has an inner opening lever (7), an outer opening lever and further levers and a central locking lever (11) adjustable by the actuating part (6), characterized in that the actuating part (6) on the rotor (5) can be moved radially to the rotor (5) and is spring-loaded radially outwards and thus when the central locking drive (2) is blocked in an intermediate position can be radially deflected against the spring force and allows unlocking or unlocking of the door lock. Motor vehicle door lock according to the preceding claim, characterized in that the actuating part (6) with the rotor (5) always returns to the neutral position N. Motor vehicle door lock according to one of the preceding claims, characterized in that the lock mechanism (1) has an anti-theft lever (12) which can be adjusted by the actuating part (6). Motor vehicle door lock according to one of the preceding claims, characterized in that the central locking lever (11) and / or the anti-theft lever (12) is mounted on an axis (17) parallel to the axis of rotation of the rotor (5) and is U-shaped, in each case one leg (18 or 19 or 20 or 21) of the U with a control edge protrudes into the movement path of the actuating part (6), while the other leg (19 or 18 or 21 or 20) of the U with a guide edge on the edge of the movement path of the actuating part (6). Motor vehicle door lock according to claim 4, characterized in that each leg (18, 19, 20, 21) has a control edge (22) and a subsequent guide edge (23). Motor vehicle door lock according to claim 5, characterized in that the guide edge (23) in the position at the edge of the movement path of the actuating part (6) extends orthogonally to the radius direction of the rotor (5). Motor vehicle door lock according to one of claims 4 to 6, characterized in that each control edge (22) has an incline which is adapted to the force effect of the actuating part (6) when it strikes in the circumferential direction. Motor vehicle door lock according to one of the preceding claims, characterized in that the external locking lever (9) has an actuating nose (24) which, when the anti-theft lever (12) is in the anti-theft position, brings the anti-theft lever (12) into the anti-theft position during the unlocking movement. Motor vehicle door lock according to one of the preceding claims, characterized in that the inner opening lever (7) is switched to freewheel in the anti-theft position. Motor vehicle door lock according to one of the preceding claims, characterized in that the actuating part (6) is displaceably mounted on the rotor (5).

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