EP2831355A1

EP2831355A1 - Motor vehicle door lock

Info

Publication number: EP2831355A1
Application number: EP13709439.7A
Authority: EP
Inventors: Artur Torka; Udo Orzech; Stephan Wietkamp
Original assignee: Huf Huelsbeck and Fuerst GmbH and Co KG
Current assignee: Huf Huelsbeck and Fuerst GmbH and Co KG
Priority date: 2012-03-29
Filing date: 2013-03-15
Publication date: 2015-02-04
Anticipated expiration: 2033-03-15
Also published as: WO2013143875A1; EP2865828B1; US20150061301A1; US9784021B2; CN105672786A; CN104169510A; DE102012102724A1; CN104169510B; EP2831355B1; EP2865828A1; CN105672786B

Abstract

The invention relates to a motor vehicle door lock (1), comprising a rotary latch (4) that in a locking position encompasses a locking element (2) and that is pre-tensioned in the direction of an open position releasing the locking element (2), a pawl (7) that, in an engagement position with the rotary latch (4), is engaged in such a manner that the rotary latch (4) is inhibited from moving in the direction of the open position, and a drive element (11), by means of which a coupling section (18) of the pawl is coupled in terms of movement and which moves the pawl (7) between an engagement position and a release position in which the pawl (7) is not engaged with the rotary latch (4), so that the rotary latch (4) can move in the direction of the open position. The invention aims at creating a solution by means of which a reliably working motor vehicle door lock having a compact design is provided both in a simple manner in terms of design and cost-effectively, said motor vehicle door lock being able to make do with a motor operating on a low energy level. This is achieved in that force is applied to the pawl (7) only in the engagement position thereof and the force application holds the pawl (7) in engagement with the rotary latch (4).

Description

Motor vehicle door lock

The invention is directed to a motor vehicle door lock with a closure element encompassing a closing element and in the direction of a closing element

releasing open position pre-tensioned catch, one

A pawl, which engages in an engaged position with the rotary latch such that the rotary latch is prevented from moving in the direction of the open position, and a

A drive member to which a coupling portion of the pawl is coupled for movement and which moves the pawl between the engaged position and a release pitch, in which the pawl is disengaged from the rotary latch, so that the rotary latch can move in the direction of the open position.

A motor vehicle door lock of the aforementioned type is known for example from DE 10 2007 024 672 AI and is used for example in a tailgate of a motor vehicle. Such a motor vehicle door lock comprises a connected to a trunk lid and usually with a

Rotary latch equipped lock element and one with a

Body of the motor vehicle associated lock counterpart, which may be in the form of a striker or latch bolt. In order to open the tailgate, a user operates (e.g., by means of an electronic key) a control means by which the tailgate can be opened by means of a drive member which is preferably operated by an electric motor. In this case, a pivotable from the drive element

mounted pawl from an engaged position, in which the most spring-loaded pawl with the catch is engaged in the direction of a release division as long deflected until it has reached the release division and is no longer engaged with the catch, creating a

Rotary movement of the catch is released from the closed position in the direction of an open position. The movement of the pawl from the engaged position to the open position takes place against the Force of a spring element, since the pawl

Federkraftbeaufschlagt and is biased in the direction of the closed position. Therefore, the drive motor driving the motor must be dimensioned accordingly, the tendency tends to be as small as possible and thus low-power engines, whereby the energy consumption of the motor vehicle door lock can then be reduced again.

It is also to be considered in the further development of an advanced motor vehicle door lock that the tailgate is biased in the closed position generally against a seal. Under bias is to be understood here that caused by a flap seal

Sealing counterpressure counteracts the closing of the motor vehicle door. As a result, there is a high pressure in the opening direction of the tailgate due to the compressed from the tailgate seal. If the pawl with the catch except

Engaged, builds up the pressure built up by the seal in the form of a so-called relief shock quickly and the tailgate moves abruptly and jerkily in the direction of the opening direction, resulting in an audible audible

Opening noise negatively noticeable and leads to losses in comfort.

In addition, in the closed position in the

Drehfallenmaul the catch arranged closing element due to provided tolerances cause unwanted rattling noise, which as well as the opening noise leads to loss of comfort.

The invention has for its object to provide a solution that in a structurally simple way and cost-effectively working and compact

Provides a motor vehicle door closure, which manages with a low-energy engine, the noise of the provided

Total vehicle door lock is reduced to a minimum.

In a motor vehicle door lock of the beginning

designated type, the object is achieved in that the pawl exclusively in her Engagement position is subjected to force and the

Apply force to the pawl with the catch in

Intervention stops.

Likewise, the object is achieved in a motor vehicle door lock of the aforementioned type according to the invention that a lever-like and rotatable about a rotation axis signal element is provided, the rotational position indicating the engaged position of the pawl.

Also, in a motor vehicle door lock of the type mentioned, the object is achieved in that in the closed position the closing element of the rotary latch and a pivotable about a pivot axis and motion-coupled with the rotary motion immobilization element is held in a jammed manner.

Finally, in a motor vehicle door lock of the type mentioned, the object is achieved in that the drive element, the pawl during movement from the engaged position in the direction of

Release position moves so that the at this

Movement with the pawl still engaged catch in the direction of the open position moves.

Advantageous and expedient embodiments and

Further developments of the invention will become apparent from the

Subclaims.

The invention provides a motor vehicle door lock for

Provided, which contributes to increase the comfort and quality of the closure and its operation. The motor vehicle door lock according to the invention is characterized by a functional design and has a simple, inexpensive and compact design.

In the release mechanism according to the invention moves

Drive element, the pawl during movement from the engaged position in the direction of the release position such that during this movement with the pawl still engaged rotary latch moves in the direction of the open position. Due to the release mechanism of the

Motor vehicle door lock according to the present invention stand the pawl and the rotary latch during a movement operation of the pawl in the direction of

Release still in engagement. Although this movement of the pawl does not allow the opening of the tailgate. However, by this (first or initial) movement at

Opening operation, the bias of the tailgate degraded because the defined movement of the pawl a relative movement

between the motor vehicle door lock and the closing element and thus a relief of the tailgate causes, wherein the rotary latch is rotated by a predetermined rotational movement in the open position. This ultimately allows the tailgate to move a defined stroke relative to the closure member, thereby relieving the preload and pressure previously known in the prior art

Motor vehicle door locks was responsible for the acoustically perceptible and disturbing opening noise. Accordingly, the invention provides that the bias between the tailgate or motor vehicle door lock and closing element is reduced before the pawl and the rotary latch are disengaged.

With regard to disturbing rattling noises held in the catch closing element, the invention sees in the

Motor vehicle door lock before the immobilizer element. Due to the immobilization element, the closing element in

Closed position of the catch between the catch and the immobilizer element clamped so that a relative

Movement of the closing element with respect to the rotary latch, which is responsible for the disturbing rattling noise, is prevented. So that the clamping force does not interfere with the opening of the motor vehicle door lock, the immobilization element is with the

Rotary latch motion coupled, which ensures that during a movement of the rotary latch from the closed position to the open position and the immobilizer element is moved accordingly and releases the closing element.

The compactness of the motor vehicle door lock is inventively increased by the signal element and / or by the fact that the pawl only or exclusively in their Engagement position is subjected to force. The only in

Engaging engagement of the pawl allows the use of a motorized opening aid, which must apply only the force required to the

Pawl to move to the open position. For example, the pawl according to the invention only in the engaged position

be spring loaded. Once the pawl out of the

Engaged position is moved, no spring force acts on the pawl. In this case, no additional force to overcome a possible spring force is then required. The pawl experiences a kind of load change in its movement from the engaged position in the

Release position, wherein outside the engaged position, the pawl is not spring-loaded. In the prior art, the pawl is also outside its engaged position

spring loaded, so that for pivoting in the

Open position in addition to the effort of the actual

Movement of the pawl had to be applied an additional force to overcome the acting spring force. This is no longer required by the invention, so that a motor drive with lower power can be used to operate the motor vehicle door lock. As a result of

Lower power requirement of the motor drive thus a smaller motor can be used, so that overall the space of the motor vehicle door lock is smaller and the motor vehicle door lock is made more compact. In addition, due to the lower power requirement and the smaller installation space, the costs for producing the

Motor vehicle door lock. By the invention

Signal element, which is rotatable about a rotation axis in the manner of a rocker, now only a single sensor is required in comparison to the prior art to the

HaupttrastStellung or engagement position of the pawl or to detect the closed position of the motor vehicle door lock.

In an embodiment of the invention, it is in terms of

Applying force to the pawl advantageous when in Engagement position an end formed on the pawl investment area is pressed against a stop element, that a latching portion, which at the investment area

is formed opposite end of the pawl, is subjected to force in the direction of the rotary latch. By pressing the stop element against the contact area is the

Pawl pivoted about the hinge axis such that a

Resting portion of the pawl is urged into the engaged position.

In this case, the stop element in a further embodiment of

Invention be designed as an elastic stop surface.

In particular, the stop element as a spring element

be formed, wherein in the closed position, a first leg of the spring element presses against the contact surface of the pawl and a second leg is fixedly supported on a housing element of the motor vehicle door lock, and wherein at

Movement of the pawl from the engaged position, the first leg of the spring element out of engagement with the

Investment surface is brought.

With respect to the lever-type and rotatable about a rotation axis

Signal element, the invention provides in an embodiment that the rotational position of the signal element from the position of

Drive element is dependent, wherein the drive element has a guide web, which upon movement of the pawl from the engaged position against an end on the signal element

trained leadership pushes and thereby the

Signal element turns. In this way, upon rotation of the

Drive element automatically deflected the signal element, which is detected that the pawl is no longer arranged in the engaged position.

Of particular advantage, it is then, if the

Signal element cooperates with a sensor such that upon rotation of the signal element with simultaneous movement of the

Pawl from the engaged position out an end formed on the signal element actuating lug a

Actuator of the sensor operated. The operation is one of the operating state of

Motor vehicle door lock meaningful signal

equate, which is why in further embodiment

is provided according to the invention that the actuation of the

Actuator of the sensor indicates that the

Pawl is not in the engaged position.

According to a further embodiment, this means that in the engaged position of the pawl, the actuating element of the sensor is not actuated, so that for efficiency reasons, the supply of the motor can be interrupted with power and only resumed when the pawl is to be deflected from the engaged position.

With regard to the immobilizing element, which clamps the closing element together with the rotary latch in its closed position, the invention provides in an embodiment that the immobilizing element with the rotary latch such

is motion coupled, that upon movement of the rotary latch in the direction of the open position for release of the closing element, the immobilizing element pivots away from the rotary latch. In this way, it is ensured that the immobilizer element is only in the corresponding position when the closing element is to be actually kept motion-inhibited.

In an embodiment of the invention, the

Motion coupling of rotary latch and immobilization element in a simple constructive and mechanical manner thereby

realize when the catch has a radially offset to its axis of rotation arranged actuator, which in a movement of the rotary latch in the direction of the open position the

Immobilizer element is pushing away from the rotary latch.

To ensure that the immobilizing element is only in the corresponding position when the closing element is to be kept actually motion-inhibited, the invention provides in a further embodiment that in

Open position of the catch the immobilizer element is arranged and locked in a detent position moved away from the rotary latch. The locking of the immobilizing element in the locking position is carried out according to the invention in that the immobilizing element has a latching element which is in detent position with a formed as a latching projection end of the rotatably mounted and lever-like signal element is engaged.

To ensure the immobilization of the closing element, if this is held by the rotary latch in the closed position, it is in an embodiment of the invention particularly advantageous if the immobilizing element has a curved stop edge, which presses in the closed position of the rotary latch against the closing element. It is in the closed position the

Closing element virtually surrounded by the curved stop flank laterally, so that a mutual sliding of closing element and immobilization element is prevented. In particular, the closing element is received in the closed position in the "trough" of the curved stop flank.

In an embodiment of the motor vehicle door lock, the invention provides that the movement of the drive element a

Rotational movement is, during the movement of the pawl from the engaged position in the direction of the release position, a substantially tangential with respect to the rotary latch movement of the pawl and then to bring the pawl and the rotary latch out of engagement, a substantially radially of the

Rotary latch causes groundbreaking movement of the pawl. This movement refers to a latching portion of the pawl, which engages in the engaged position with the rotary latch. In other words, the drive element for opening the motor vehicle door lock is rotated such that the

Pawl or at least a portion of the pawl, i. the latching section, initially during the movement out of the

Engaged position in the direction of the release position in

Is moved substantially tangentially with respect to the rotary latch and then, in order to disengage the pawl and the rotary latch, is moved substantially radially away from the rotary latch. The executed during the opening process of the motor vehicle door lock movement of the pawl is thus divided into two or consists of a sequence of movements in which the pawl is moved in at least two different spatial directions. To initially take the pressure from the tailgate in the closed position or to relieve the preloaded tailgate, there is a substantially tangential movement of the pawl with respect to the rotary latch. In this movement stands the

Pawl still with the catch engaged, but depending on the tangential distance by which the pawl is moved, the catch a rotation in

Open position is possible, causing the pressure of the

Tailgate degrades. Only after the pressure reduction or the reduction of the bias takes place then with the help of the radial

Sideways movement of the pawl which disengages with the catch, whereby this then releases the closing element for opening the tailgate. Made up of two movements in

composing different spatial directions

Opening movement of the pawl thus allows the degradation of the force acting on the tailgate in the closed position bias by the pawl causes a controlled movement of the tailgate in the opening direction for a certain stroke.

Furthermore, it is advantageous if the coupling part of the pawl, which is coupled with the drive element in terms of movement, is mounted pivotably on a hinge axis and about this. to

Reduction of the opening noise by reducing the

Preload between the tailgate or motor vehicle door lock and closing element, before the pawl and the catch are disengaged, is provided in a further embodiment of the invention, that the hinge axis translationally moves during the movement of the pawl in the direction of the release position relative to the axis of rotation of the rotary latch. During the movement of the hinge axis in the direction of the axis of rotation, the pawl is indeed still engaged with the rotary latch, however, due to the translational and tangential to the rotary latch movement of the pawl can

Turn the catch in the direction of its open position.

A particularly powerful and at the same time efficient way of coupling the drive element and the coupling section of the pawl can be achieved by a type of double toggle lever achieve. To this end, the invention provides in an embodiment that a push rod element is provided, of which a first end is pivotally and radially offset from the axis of rotation of the drive element coupled to the drive element and of the second end of the coupling with the

Pawl motion-coupled joint axis receives, wherein a first end of a hinge lever is fixedly mounted and rotatably mounted on a housing element mounted on the guide axis and a second end of the articulated lever rotatably and pivotably supports the push rod element and the motion-coupled to the pawl hinge axis. Thus, a first toggle lever is defined by the second end of the push rod member and the fixedly mounted toggle lever, wherein the pawl is coupled via the hinge axis with the toggle lever and with the push rod member. A second toggle is by the first end of the push rod member and its relative to the

Rotary axis eccentric or radially offset coupling defined with the drive element.

To increase security is in the case of a

Vehicle accident in which acceleration forces on the

Act vehicle door lock and can cause the pawl and / or rotary latch are deflected so that they are undesirable from the engaged position,

The invention provides that the pawl has a bend, which acts in the engaged position on the end stop and the movement of the pawl over the

Adjacent engagement position limiting guide axis. In the position in which the bend of the pawl on the

Guide axis is applied, i. in engaged position, the push rod or its force line assumes a position in which it has exceeded a dead center and thereby in the

Engaged engagement position is self-locking, wherein the

Guide axle acts as a mechanical stop.

So that further the bias voltage with which the tailgate is biased in the closed position, gradually and not

abruptly degraded, it is in an embodiment of the invention further advantageous if the movement from the engaged position in the direction of the release position of the hinged to the hinge axis coupling portion of the pawl is a circular section-shaped movement. It is conceivable, for example, quarter-circle or semi-circular movements.

It is understood that the above and

hereinafter to be explained features not only in the combination specified, but also in others

Combinations or alone, without departing from the scope of the present invention. The scope of the invention is defined only by the claims.

Further details, features and advantages of the subject matter of the invention will become apparent from the following description taken in conjunction with the drawings, in which by way of example

preferred embodiment of the invention is shown. In the drawing shows:

1 shows a motor vehicle door lock according to the invention in the assembled state in a perspective view,

2 shows the motor vehicle door lock in a kind

Assembly representation in perspective view,

Figure 3 in detail view for opening and

Closing the motor vehicle door lock necessary components,

FIG. 4 shows a top view of the motor vehicle door lock in the closed position,

FIG. 5 shows a top view of the motor vehicle door lock in the open position;

Figure 6 is a perspective view of a pawl of

Motor vehicle door lock,

FIG. 7 is an enlarged view of a portion of FIG

Pawl in the closed position of the motor vehicle door lock,

FIG. 8 shows an enlarged view of the area shown in FIG. 7 in the open position of the motor vehicle door closure,

Figure 9 in rear view a signal lever together with other components of the motor vehicle door lock in

closed position, Figure 10 is a front view of the signal lever together with the other components of the motor vehicle door lock in

closed position,

Figure 11 in rear view the signal lever together with

other components of the motor vehicle door lock in the open position,

FIG. 12 shows a front view of the signal lever together with further components of the motor vehicle door lock in the open position;

13 is a rear view of the interaction of the rotary latch with a immobilization element in the closed position, FIG.

FIG. 14 is a rear view of the interaction of the catch, the immobilization element and the signal element in the open position, FIG. 15 shows, in the closed position, the immobilization element with an actuating element of the rotary latch in plan view,

Figure 16 in the open position, the immobilization element with the actuator of the rotary latch in plan view and

17 shows the immobilization element with the adjusting element of the rotary latch from FIG. 16 in a slightly perspective view

Side view.

FIG. 1 shows a perspective view of a motor vehicle ^door lock 1 according to the invention, in particular one

Tailgate lock assembly. The motor vehicle door lock 1, which can be mounted on a tailgate of a motor vehicle, engages for the purpose of closing in a schematically and only in the figures 4 and 13 illustrated closing element 2 a. The closing element 2 may be formed, for example, as a locking pin or striker and fastened to a vehicle frame. The motor vehicle door lock 1 comprises a housing element 3, in which further components of the

Motor vehicle door lock 1 are received and housed. For reasons of clarity, the housing element 3 is shown only in FIG. As in Figures 1 to 5

is removed, the motor vehicle door lock 1 further comprises a rotary latch 4, which is a stationary axis of rotation 5 on the

Housing element 3 is rotatably mounted and having a rotary latch jaw 6, in which engages the closing element 2. The Rotary latch 4 is biased by a spring element, not shown in more detail or spring (force) eaufschlagt or

spring preloaded in such a way that it strives to resist the closed position shown in FIGS. 1 and 4

Turn clockwise in the direction of arrow A, so that the closing element 2 with reference to Figure 4 downwards

is released.

In order to avoid unintentional release in the closed state shown in Figures 1 and 4, the rotary latch 4 is held by a pawl 7 by a

Locking portion 8 of the pawl 7 with a latching arm 9 am

Rotary latch jaw 6 is engaged. It can in addition to the

In addition, the pawl 7 at least in its engaged position by means of a spring element to be biased or spring preloaded to the engagement position with the

To hold the catch. The shown in Figures 1 and 4

Position is the so-called locking position of

Motor vehicle door lock, in which the catch 4 in a closed position and the pawl 7 in a

Engage position. In the locking position, the prestressed rotary latch 4 presses with its latching arm 9 on the

Locking portion 8 of the pawl 7, whereby the closing element 2 is fixed in the rotary latch jaw 6, as shown in Figure 4 can be seen. In other words, the rotary latch 4 is biased in the direction of the closing element 2 releasing open position. In the engaged position, the pawl 7 is engaged with the rotary latch 4 such that the rotary latch 4 is prevented from moving in the direction of the open position, wherein the

Open position shown in Figure 5.

The pawl 7 is interposed with a

Push rod element or a push rod 10 with a drive element 11 shown in Figures 1 to 5 connected in a coupled movement. The apparent in the figures tooth geometry of the drive element 11 is not one with in the figures

shown motor opening aid, which may be formed, for example, as a motor with helical worm gear, in engagement. The drive element 11, which is disc-shaped, is fixedly and rotatably mounted on the housing member 3 about a rotation axis 12 and has a visible in Figure 3 radial projection 13 which projects beyond the peripheral edge of the drive member 11 addition or

protrudes. In the figures 4 and 5, in which the closed or open position of the motor vehicle door latch 1 is shown with reference to the essential components of the rotary latch 4, the pawl 7, the push rod 10 and the drive member 11, the radial extension 13 of a transmission lever 14th

covered, the ends of which are attached to the rotation axis 12 and arranged at the end of the radial extension 13 transmission axis 15. The transmission axis 15 is arranged radially offset from the axis of rotation 12, wherein the rotation axis 12 in contrast to the transmission axis 15 is stationary. For transmitting the rotational movement of the drive element 11 on the pawl 7, so that these between the engaged position and a

Release position, in which the pawl 7 is brought out of engagement with the rotary latch 4, a first end 16 of the push rod element or the push rod 10 at the end of the radial projection 13 is coupled to the transmission axis 15 with the drive element 11, as the single part representation of Figure 3 can be seen. The first end 16 of the push rod 10 is radially offset from the axis of rotation 12 of the

Drive element 11 attached to the radial projection 13 rotatably or pivotally. The push rod 10 is slightly bent, with a second end 17 (see FIG. 3) of the push rod 10 being movably coupled to a coupling portion 18 of the pawl 7 and to a hinge lever element 19. In this case, one end of the articulated lever element 19 is rotatably mounted on a hinge axis 20, whereby the articulated lever element 19, the movement of the second end 17 of the push rod member 10 and the

Coupling portion 18 of the pawl 7 at a distance about a guide axis 21 leads around. At the hinge axis 20 are

in addition, the coupling portion 18 of the pawl 7 and the second end 17 of the push rod 10 rotatably supported. The other end of the toggle element 19 is at the stationary

Guide shaft 21 rotatably mounted. The hinge axis 25 is in Unlike the rotation axis 5 with respect to the housing member 3 is not stationary, but moves during the movement of the pawl 7 in the direction of the release position relative to

Rotation axis 5 of the rotary latch 4 translationally along the movement curve 22 shown only in Figure 4 through this

Movement curve 22 learns the coupling portion 18 of

Pawl 7 a circular segment-shaped movement, which is not a rotational but a translational movement. Thus takes place for the hinge axis 20 and the coupling portion 18 a circular section-shaped movement when the pawl 7 moves from the open position (Figure 4) in the release position (Figure 5). The position of the hinge axis 20 with respect to the stationary axis of rotation 5 of the rotary latch 4 is therefore not

constant, but changes during the movement of the pawl 7 from the open position to the release position. The position change of the hinge axis 20 and the coupling portion 18 is effected by the drive element 11, wherein the push rod 10 transmits the driving force of the drive element 11 to the coupling portion 18 of the pawl 7.

To an acoustically audible and disturbing opening noise of the biased tailgate and thus the

To prevent motor vehicle door closure 1, it is provided that the drive element 11, the pawl 7 during the

Movement from the engaged position in the direction of

Release position moves so that the at this

Moving with the pawl 7 still engaged or located rotary latch 4 moves or rotates in the direction of the open position. Through this movement, the bias of the

Tailgate reduced or reduced, since the tailgate due to the described motion coupling to a

defined hub can move from the locked position.

This movement for reducing or avoiding disturbing opening noise will be described below.

The movement of the latching section 8 of the pawl 7 from its locking or engagement position shown in Figure 4 in the open position of the illustrated in Figure 5

Motor vehicle door closure 1 takes place along the movement path 23, which is shown schematically in the box on the side of the

Motor vehicle door closure 1 is shown, wherein the point 24 indicates the current position (engagement position) of the locking portion 8 on the movement path 23. By the rotational movement of the drive element 11 (indicated by the arrow B in Figure 4), the push rod 10 is pivoted from the position shown in Figure 4 in the position of Figure 5. In this case, the movement of the second end 17 of the push rod 10 of the

Articulated lever element 19 guided along the movement curve 22, so that thereby also the coupling portion 18 of the pawl 7, via the hinge axis 20 with the second end 17 of

Push rod 10 is coupled, moved along the movement curve 22. Through this coupling, the coupling portion 18 of the pawl 7 undergoes a substantially circular segment-shaped movement. The movement of the locking portion 8 from the

Engagement position in the direction of the release position, however, is in a first movement section with respect to the

Tail 4 substantially tangential movement of the

Rastabschnitts 8, which is due to the vertical course of

Trajectory 23 is marked. This is what the

Pawl 7 continues to engage with the rotary latch 4.

However, the tangential movement of the

Rastabschnitts 8 a rotary movement of the rotary latch 4 in the direction of the open position, so that the bias voltage at

closed closure prevails, is dismantled, without the closure is open. In a second movement portion of the pawl 7 and the latching portion 8 is the

Locking portion 8 then moved radially away from the rotary latch 4, which is characterized by the substantially vertical course of the movement path 23 to bring the pawl 7 and the catch 4 out of engagement.

As previously described, the power transmission of the drive member 11 via the radial projection 13, which corresponds to a transmission lever, initially on the push rod 10, from which the force is then transmitted to the coupling portion 18 of the pawl 7. In this case, the transmitted force of the toggle element 19 in a defined movement of the Coupling section 18 implemented as described above. In terms of power transmission defines the

Articulated lever element 19 a first toggle lever and the

Radial approach 13 a second toggle. Both toggle

cause a particularly powerful movement coupling. The second toggle secures the first toggle, especially since the moments on the second toggle are very small, so it can be well secured by low forces. The rotational movement or rotational movement of the drive element 11 in the counterclockwise direction initially causes a substantially tangential with respect to the rotary latch 4 movement of the locking portion 8 of the pawl 7. Although the coupling portion 18 of the pawl 7 moves along the circular segment-shaped movement curve 22, but the Locking portion 8 of the pawl 7 initially moves substantially tangentially to the catch 4. In the

Overall movement of the pawl 8, as described above, deviates the movement of the coupling portion 18, which follows due to the movement coupling with the drive member 11 of the circular segment-shaped movement curve 22, from the movement of the locking portion 8 of the pawl 7. The locking portion 8, which is in the engaged position of the pawl 7 with the rotary latch 4 is engaged, is guided by means of a control pin 25. The movement of the control pin 25 to the

Rotary latch 4 towards or away from this is guided by the contour of a pivotally mounted on the housing element 3 Vorrasthebels 26. For this specific embodiment modifications are possible, which take care, the locking portion 8 of

Pawl 7 relative to the rotary latch 4 to move.

For reasons of safety, it is also desirable that the motor vehicle door lock 1 also in the case of

Vehicle accident remains in the closed position. Therefore, the motor vehicle door latch 1 at a

Vehicle accident prevailing acceleration forces

withstand, so that pawl 7 and catch 4 do not get out of engagement. For this purpose, the pawl 7 a bend 27 (see Figures 2, 3 and 5), which in

Engagement position (Figure 4) acting on the end stop as and the movement of the pawl 7 beyond the engagement position limiting guide axis 21 abuts. In this

Position in which the bend 27 of the pawl 7 at the

Guide axle 21 rests, ie in the engaged position, the push rod 10 assumes a position in which it has exceeded a dead center and thereby in the engaged position

locked self-locking. The guide shaft 21 serves as a mechanical stop which limits the movement of the pawl 7 from the open position into the engaged position.

The above description was directed to the particular

Motion kinematics of the motor vehicle door closure 1, which leads to an opening process with minimal noise

contributes. Before now more features and special

technical characteristics of the motor vehicle door lock 1 are described in more detail, is first the more constructive

Structure of the motor vehicle door lock 1 explained.

The apparent from Figure 1, particularly compact construction of the motor vehicle door closure 1 is possible in that the individual components are arranged in different, successive planes, as indicated in Figure 2. In this case, in addition to the rotary latch 4, the pawl 7 and the articulated lever element 19, a closing lever 28 is arranged in a first plane which is rotatable about a rotational axis 29 fixed relative to the housing element 3 and secures the rotary latch 4 in the closed position of the motor vehicle door latch 1, so that it can not turn into the open position. The stationary axis of rotation 29 is in this case on a sheet-like

Functional element 30 attached, which is part of the second and middle level and is supported on the housing element 3. To the second or middle level are in addition a

To count Ruhigstellungselement 31 which is pivotable about a fixedly mounted on the housing element 3 pivot axis 32. To a third level then count the Vorrasthebel 26, the

is mounted pivotably about and on the pivot axis 32, a first sensor 33 for the Vorrasthebel 26, a lever-like

Signal element 34 which is rotatable about a rotation axis 35, and a second sensor 36 for the lever-like signal element 34. This compact design allows in addition to the noise-reduced opening movement a complex and advantageous interaction of individual components, to which the following description

comes in.

In an advanced motor vehicle door latch 1, it is an object to reduce the power consumption and / or the driving force of the motor opening aid driving the drive element 11. For this purpose, the invention provides that the coupling portion 18 of the pawl 7 in the engaged position, which is shown for example in Figure 4, is pressed against a stop member, that the locking portion 8 of the pawl 7 is urged in the direction of the rotary latch 4. More precisely, in the engaged position is a contact area 37 of the

Pawl 7, which can be seen in detail in Figure 6 in a perspective view of the pawl 7, on a

Stop element, wherein the stop element in the form of a spring element 38, in particular a leg spring, is formed. A first end or a first leg 39 of the

Spring element 38 presses in the engaged position against the

Bearing portion 37 of the pawl 7, whereas the other end or the second leg 40 of the spring element 38 is supported on the functional element 30, wherein the central region of the spring element 38 is wound around the guide axis, as apparent from the enlarged view of Figure 7. The first leg 39 of the spring element 38 is by means of a laterally on the

Investment area 37 integrally formed first retaining lug 41 secured against lateral sliding of the contact area 37. A sliding of the first leg 39 of the spring element 38 to the other side of the contact area 37 is prevented by a second holding lug 42, wherein the second holding lug 42 is formed on the functional element 30. In the engaged position, the first leg 39 of the spring element 38 presses elastically against the abutment region 37 of the pawl 7, so that the

Pawl 7 against the force of the spring element 38 to the

Guide shaft 21 pivots, whereby the locking portion 8 in

Direction of the rotary latch 4 is urged and is securely brought into engagement with the latching arm 9 of the rotary latch 4. The spring element 38 is stationary by the second holding lug 42, its leading to the guide axis 21 central region and by its second leg 40, which on the functional element 30th

is secured, mounted in a fixed position on the functional element 30. Once the pawl 7 is moved from the engaged position to the open position, the abutment portion 37 of the pawl 7 moves away from the first end 39 of the spring member 38, whereby the force of the spring member 38 no longer acts on the pawl 7 and in particular their abutment portion 37 , In this way, the motor opening aid, which drives the drive member 11 to move the pawl 7, only apply the force that is required to the

Pawl 7 to move to the open position. An additional force to overcome the spring force of the spring element 38 is obviously not required. Because with the onset of the movement of the pawl 7, which among other things by the

circular segment-shaped movement of the coupling region 18

is marked, the contact area 37 comes out of engagement with the spring element 38. In Figure 8, the open position is shown, it can be clearly seen that the

Contact area 37 no longer with the spring element 38 in

Active compound is. By this invention

Cooperation of spring element 38 and pawl 7, the pawl 7 in the engaged position such spring force urged that the locking portion 8 is urged in the direction of the rotary latch 4, with the onset of movement of the pawl 7 from the engaged position to the open position, the pawl 7 no longer is spring-loaded by the spring element 38, because the coupling portion 18 is pivoted away from the stationary, first end 39 of the spring element 38. The pawl 7 thus undergoes a kind of load change, wherein the spring force of the spring element 38, the latching portion 8 in the

Engagement position urges, only in the closed position of the

Motor vehicle door lock 1 acts. The spring element 38 therefore does not act when the pawl 7 is deflected out of the engaged position. This can be used to operate the

Motor vehicle door lock 1 a motor drive with lower power used because of the movement of the

Pawl 7 no spring force must be overcome. As a result of the lower power requirement to the motor drive thus a lower-power motor can be used, so that overall the space of the motor vehicle door lock 1 can turn out smaller. The lower power requirement and the smaller space lead to the costs to

Lower the production of the motor vehicle door lock 1. Nevertheless, the closing element 2 is secured by the rotary latch 4 and the pawl 7 in the closed position, because in this

Position, the spring force of the spring element 38 acts, so that even in the event of a vehicle crash, the closing element 2 safely

is held.

In the development of a new motor vehicle door closure, it is another goal of the designers and developers that the motor vehicle door closure can operate with a low energy engine and few components. From the prior art, it is known that a motor via a transmission of the drive member 11 controls the movement of the pawl 7. The engine is switched on and off by two sensors, the sensors respond to a specific gear position and / or by manual actuation of the sensors. The response is usually in the respective end positions of the open and closed positions of the motor vehicle door lock by respective sensors, which is why known motor vehicle door locks thus have the two sensors. In the motor vehicle door lock according to the invention, the further goal is achieved with the aid of the lever-like signal element 34. Due to the manner of a rocker about the rotation axis 35 rotatable signal element 34 only a single sensor 36 is required to detect the HaupttrastStellung or engaged position of the motor vehicle door lock 1 can or detect. When it is detected that the vehicle door latch 1 is not between the

Engagement position and the open position is located, but is arranged in the engaged position, then there is a shutdown of the energization of the not shown in the figures Motors, so that the transmission rests, wherein the motor is connected to the formed as a microswitch sensor 36. FIGS. 9 to 12 illustrate the principle of the lever-like signal element 34, wherein the motor vehicle door lock 1 is in the engaged position in FIGS. 9 and 10, whereas in FIGS. 11 and 12 the motor vehicle door lock 1 is arranged in the open position. Figures 9 and 11 show a rear view of the signal lever 34, the second sensor 36, the drive element 11, the push rod member 10, the pawl 7 and the rotary latch 4, whereas in Figures 10 and 12, a respective front view is shown, in which Rotary latch 4 has been omitted for reasons of clarity. In the

Engagement position, which is shown in Figures 9 and 10, remains an arm-shaped actuating element 43 as

Microswitch trained sensor 36 unconfirmed. The

Hebe-shaped signal element 34 is spring preloaded and tends to rotate in the direction of arrow C. This tendency is thus directed away from the actuating element 43 for an actuating projection 44, which is formed on the end of the signal element 34, so that the signal element 34 endeavors not to actuate the actuating element 43. Only as long as the drive element 11 is in the engaged position, this endeavor of the signal element 34 is possible. End of the

Signal element 34 is the actuating lug 44 opposite a guide lug 45 (see Figures 10 and 12) is formed. On a side surface of the circular disk-shaped drive element 11, a guide web 46 is formed which extends in a circular section on the side surface of the drive element 11. In

Engagement position, the guide lug 45 is arranged laterally of the guide web 46, as can be seen in Figure 10. The loading of the signal element 34 with the spring force in

Direction of the arrow C causes the signal element 34, the actuator 43 is not actuated, indicating that the motor vehicle door lock 1 in the

Engaged position and the engine can be switched off to save power. As soon as the

Motor vehicle door lock 1 is to be opened, the Motor supplied with power and coupled to the motor drive element 11 in the direction of arrow B (see Figure 10) driven. As a result, the guide web 46 presses the

Drive element 11 the guide lug 45 in the direction of

Actuator 43, wherein upon further rotation of the

Drive element 11 in the direction of arrow B of the guide approach

45 depressed on the circular segment-shaped guide bar

46 slides along and the actuating lug 44 the

Actuator 43 is actuated, whereby the sensor 36 is then known that the drive element 11 is not in the

Engaged position and therefore the engine should not be turned off. According to the invention therefore act the drive element 11 and the lever-like signal element 34 for the detection of

Engagement position and the non-engaged position together. Thus, virtually two positions or positions can be detected by the signal element 34, wherein in the disengaged position the drive element 11 deflects the signal element 34 against the force of a spring element in order to activate the sensor 36. The activation is ultimately the actuation of the actuator 43 to indicate that the

Drive element 11 is not arranged in the engaged position. In the manner described above is thus to

Position determination or for determining the operating state of the motor vehicle door lock 1 a single sensor

perfectly adequate, so that compared to the state of

Technique in which 1 two sensors are used for determining the position of various components of the motor vehicle door lock, a sensor can be saved.

From the prior art, it is also known, a

To provide rubber buffer for the closing element 2, so that it generates no rattling noises in the closed position of the motor vehicle door lock 1, in which it is in the rotary latch jaw 6. However, such a rubber buffer increases the required closing force that must be applied to move from the open position to the closed position of the

Motor vehicle door lock 1 to get. To avoid this disadvantage, it is a still further object of the invention structurally simple way to provide, with which the closing element 2 can be secured without the application of an additional force while suppressing rattling noises in the rotary latch jaw 6. This is achieved by the immobilization element 31 already shown in FIG. 2, which is shown in detail in FIGS. 13 to 17, in which only the most important components of the motor vehicle door closure 1 are illustrated for explaining the operation of the immobilization element 31. The hebeiförmig and T-shaped immobilization element 31 is pivotally mounted at the end and at the attached to the housing member 3 pivot axis 32 and cooperates with an actuator 47 of the rotary latch 4 and the hebeiförmigen signal element 34 when the catch 4 from the closed position

(Figures 13 and 15) in the open position (Figures 14, 16 and 17) rotates. So that the closing element 2 in the closed

Position or in the closed position within the

Drehfallenmauls 6 of the catch 4 occupies a rattle-free seat, so that, for example, tolerance-dependent

Rattling noises of the closing element 2 are prevented, the hebeiförmige immobilization element 31 is provided. In this case, the immobilization element 31 exerts in the closed position or

closed position of the motor vehicle door lock 1 with a stop edge 48 a wedge effect on the closing element 2. This wedge force acting on the closing element 2 in the closed position of the motor vehicle door closure 1 takes place by a kind of self-locking effect and can be optionally reinforced by means of a spring force exerted by a leg spring. In the closed position, the stop edge 48 of the immobilization element 31 presses the closing element 2 into the rotary latch jaw 6, so that the closing element 31 is arranged without play in the rotary latch jaw 6. This allows

Immobilization element 31 even a certain lift of the

Shooting element 2, whereby this can even move easily in the direction of the signal element 34, although it is already in the

Rotary latch jaw 6 is arranged. When moving out of the

Closed position in the open position or open position is now required that the force exerted by the immobilizer element 31 on the closing element 2 clamping action is canceled or at least mitigated so that the clamping force of the

Opening the vehicle door latch 1 does not get in the way. For this purpose, it is provided that the immobilization element 31 is pivoted at the beginning of the opening process from the position shown in Figures 13 and 15 about the pivot axis 32 such that the stop edge 48 pivoted away from the rotary latch jaw 6 and lifted their contact with the closing element 2 becomes. For this purpose, the rotary latch 4 is motion-coupled with the immobilizing element 31. More precisely, upon rotation of the rotary latch 4, the adjusting element 47 comes into abutment against a bearing flank

49 of the immobilizer element 31. The actuator 47 is radially offset from the axis of rotation 5 attached to the rotary latch 4, so that a rotational movement of the rotary latch 4 causes a circular section-shaped movement of the actuating element 47. At this

the adjusting element 47 moves along the abutment edge 49 of the immobilization element 31, as indicated by the arrow D in Figure 16, and causes the above-described pivoting of the Ruhigstellungselements 31. The end of the pivoting movement of the immobilization element 31 is defined by a hook-shaped locking element 50, which at the pivot axis 32 facing away from the end of

Restigstellungselements 31 is formed, is brought into engagement with a latching projection 51. The latching projection 51 is at the opposite end of the actuating lug 44 of the

lever-shaped signal element 34 is formed. In the open position of the motor vehicle door lock 1 is thus the locking element

50 of the immobilization element 31 in such a manner with the latching projection 51 of the signal element 34 in engagement that the abutment edge 48 is arranged outside the region of the rotary latch jaw 6. In this way, during the movement of the

Motor vehicle door lock 1 from the open in the

closed position, the closing element 2 unhindered be introduced into the rotary latch jaw 6. Only then is the abutment edge 48 of the immobilization element 31 brought into abutment against the closure element 2. The lever-like Signal element 34 is spring-loaded in the direction of the arrow C (see FIG. 14), with the signal element 34 then rotating to the position shown in FIG. 13, when the guide web 46 of the drive element 11 no longer presses against the guide projection 45 of the signal element 31, which is shown in FIG the closed position is the case. Thus, when the spring force preloaded

Signal element 34 rotates to the position shown in Figure 13, the immobilization element 31 is disengaged from the signal element 34. Due to the fact that the

Ruhigstellungselement 31 is spring loaded, the pivots

Ruhigstellungselement 31 about the pivot axis 32 back into the position shown in Figure 13, wherein the rotary latch 4 and the closing element 2 then not in the in this figure

must be shown position, but only delayed in reaching this position. According to the embodiment shown in the figures is the

lever-shaped immobilization element 31 with the rotary latch 4 via the adjusting element 47 coupled in motion, whereby a

Rotary movement of the rotary latch 4 from the closed position into the open position, the stop edge 48 of the immobilization element 31 moves away from the rotary latch jaw 6. In alternative

Embodiments, it is conceivable, the motion coupling instead of the catch 4 with the Vorrasthebel 26, the

Pawl 7 or even the drive element 11 to realize.

In summary, a motor vehicle door lock 1 has been presented, which is characterized on the one hand by the fact that the noise during the opening process is reduced to a minimum and in particular the noise during

Relief impact is minimized. This is achieved in that during the opening operation, the pawl 7 and the rotary latch 4 are moved to each other such that the tailgate and thus the motor vehicle door lock 1 relative to the

Closing element 2 can remove, whereby the load on the tailgate pressure or the bias of the tailgate is first reduced before the pawl 7 and the catch 4 finally disengage to release the closure member 2. In particular, this is achieved by the Opening the hinge axis 20 is moved relative to the axis of rotation 5 of the rotary latch 4, whereby the first tangential

Movement to the rotary latch 4 and then the radially away from the rotary latch 4 pioneering movement of the locking portion 8 of the pawl 7 is implemented.

Next, the motor vehicle door lock 1 is characterized by a drive requiring a small installation space. This is possible because with onset of movement of the

Pawl 7 from the engaged position into the open position, the pawl 7 no longer by the spring element 38th

is spring loaded. The pawl 7 is acted upon exclusively in the engaged position by the force of the spring element 38 and with the onset of movement of the

Engagement position in the open position of the spring element 38 decoupled.

In the motor vehicle door lock 1 according to the invention also the drive element 11 and the lever-like act

Signal element 34 for detecting the engagement position and the non-engagement position together, whereby only one sensor 36 - instead of two sensors as is required in the prior art for detecting or detecting the position of the motor vehicle door closure.

The motor vehicle door lock 1 according to the invention also has an immobilization element 31, with which the

Closing element 2 without applying an additional force while suppressing rattling noises in

Rotary latch jaw 6 is secured. The immobilization element 31 is in this case motion-coupled with the rotary latch 4, so that the immobilization element 31 occupies different positions as a function of the open-closed position.

Finally, the invention also relates to a method for opening the motor vehicle door closure 1, wherein the

Pawl 7 and the catch 4 are disengaged for opening by the pawl 7 at least

is partially pivoted away from the rotary latch 4. In this case, the pawl 7 of the drive member 11 during movement from the engaged position in the direction of Release position is moved so that during this movement with the pawl 7 still engaged rotary catch 4 is moved in the direction of the open position. In addition, the drive element 11 for opening the

Motor vehicle door lock 1 turned so that the

Pawl 7 or at least a portion of the pawl 7 initially during movement from the engaged position in

Direction of the release position is moved substantially tangentially with respect to the rotary latch 4 and then to the

Pawl 7 and the catch 4 to disengage, is moved by the rotary latch 4 substantially radially away.

Of the invention is a motor vehicle door lock

which is characterized by the aspects of the double

Knee lever, the signal element, the immobilizer element and acting only in the engaged position spring element

distinguished. It is from the invention both a

Motor vehicle door lock comprises, in which the above aspects in isolation or in a variety of

Combinations are usable. Therefore, the above

Of course, the invention described does not apply to the

described and illustrated embodiment limited. It can be seen that at the illustrated in the drawing

Embodiment numerous modifications which are obvious to the person skilled in the art according to the intended use, without departing from the scope of the invention. It belongs to the invention all that which is included in the description and / or in the drawing

including what is obvious to those skilled in the art, other than the specific embodiment.

Claims

claims

1. Motor vehicle door lock (1) with

a closing element in the closed position (2)

encompassing and in the direction of the closing element (2) releasing open position biased rotary latch (4),

a pawl (7) engaged with the rotary latch (4) in an engaged position so as to prevent the rotary latch (4) from moving toward the open position, and

a drive element (11) with which a coupling portion (18) of the pawl (7) is coupled for movement and which the pawl (7) between the engaged position and a

Release position moves in which the pawl (7) with the rotary latch (4) is disengaged, so that the

Rotary latch (4) can move in the direction of the open position,

characterized,

that the pawl (7) exclusively in her

Engagement position is subjected to force and the

Applying force the pawl (7) with the catch (4) is engaged.

2. Motor vehicle door lock (1) according to claim 1, characterized in that in the engaged position an end of the pawl (7) formed contact area (37) is pressed against a stop element (38), that a latching portion (8) on the the Investment area (37) opposite end of the pawl (7) is formed in the direction of the rotary latch (4) is subjected to force.

3. Motor vehicle door lock (1) according to claim 2, characterized in that the stop element (38) is designed as an elastic stop surface.

4. Motor vehicle door lock (1) according to claim 2 or 3, characterized in that the stop element as Spring element (38) is formed, wherein in the closed position, a first leg (39) of the spring element (38) against the contact surface (37) of the pawl (7) presses and a second leg (40) fixed to a housing element (3) of the motor vehicle door lock (1) is supported, and wherein at

Movement of the pawl (7) from the engaged position, the first leg (39) of the spring element (38) is brought out of engagement with the contact surface (37).

5. Motor vehicle door lock (1) with

a closing element in the closed position (2)

Rotary latch (4) can move in the direction of the open position,

characterized,

that a lever-like and rotatable about an axis of rotation (34)

Signal element (34) is provided, the rotational position indicating the engaged position of the pawl (7).

6. Motor vehicle door lock (1) according to claim 5, characterized in that the rotational position of the signal element (34) on the position of the drive element (11) is dependent, wherein the drive element (11) has a guide web (46) which upon movement of the pawl (7) from the engaged position against a end formed on the signal element (34) guide projection (45) presses and thereby the signal element (34) rotates.

7. Motor vehicle door lock (1) according to claim 6, characterized in that the signal element (34) with a sensor (36) cooperates such that upon rotation of the signal element (34) with simultaneous movement of the pawl (7) from the engaged position out one end on the signal element (34) formed actuating lug (44) actuates an actuating element (43) of the sensor (36).

8. Motor vehicle door lock (1) according to claim 7, characterized in that the actuation of the actuating element

(43) of the sensor (36) indicates that the pawl (7) is not in the engaged position.

9. Motor vehicle door lock (1) according to claim 7 or 8, characterized in that in the engaged position of

Pawl (7) the actuating element (43) of the sensor (43) is not actuated.

10. Motor vehicle door lock (1) with

a closing element in the closed position (2)

Rotary latch (4) can move in the direction of the open position,

characterized,

that in the closed position the closing element (2) of the rotary latch (4) and a pivotable about a pivot axis (32) and with the rotary latch (4) motion coupled Restigstellungselement (31) is held motion-inhibited in a clamping manner.

11. Motor vehicle door lock (1) according to claim 10, characterized in that the immobilization element (31) is coupled with the rotary latch (4) in such a manner that upon movement of the rotary latch (4) in the direction of the open position to release the closing element (2) Immobilization element (31) of the rotary latch (4) pivots away.

12. Motor vehicle door lock (1) according to claim 11, characterized in that the rotary latch (4) has a to its axis of rotation (5) radially offset control element (47), which upon movement of the rotary latch (4) in the direction of the open position, the immobilization element (31) of the rotary latch (4) pushes away.

13. Motor vehicle door lock (1) according to one of

Claims 10 to 12, characterized in that in

Open position of the rotary latch (4) the immobilization element (31) is arranged and locked in one of the rotary latch (4) moving away detent position.

14. Motor vehicle door lock (1) according to claim 13, characterized in that the immobilizing element (31) has a latching element (50) in the latching position with a locking projection (51) shaped end of a rotatably mounted and lever-like signal element (34) into engagement stands .

15. Motor vehicle door lock (1) according to one of

Claims 10 to 14, characterized in that the

Resting element (31) has a curved stop edge (48) which presses in the closed position of the rotary latch (4) against the closing element (2).