WO2012155882A1

WO2012155882A1 - Motor vehicle door lock

Info

Publication number: WO2012155882A1
Application number: PCT/DE2012/000466
Authority: WO
Inventors: Andreas Schmitz; Johannes-Theodor Menke; Darius Schendzielorz; Thomas SCHÖNENBERG
Original assignee: Kiekert Aktiengesellschaft
Priority date: 2011-05-13
Filing date: 2012-05-04
Publication date: 2012-11-22
Also published as: EP2712381A1; DE202011100643U1; EP2712381B1

Abstract

The invention relates to a motor vehicle door lock comprising a ratchet mechanism (1, 2, 3) consisting substantially of a rotary latch (1) and a pawl (2, 3), and comprising a case (4) for housing the ratchet mechanism (2, 3). The pawl (2, 3) is designed in two parts with a first pawl element (2) and a second pawl element (3) that are movably interconnected.

Description

Description:

The invention relates to a motor vehicle door lock, with a locking mechanism consisting essentially of a catch and a pawl, and with a lock case for mounting the locking mechanism. Such motor vehicle door locks are known in large numbers from the practice and in the literature. Reference is made in this context only by way of example to the EP 1 862 618 B1 of the Applicant. There, a drive is provided in connection with a storage element. The drive is used to lift the pawl and open the locking mechanism. The storage element is acted upon by a spring and holds the pawl in the raised position until the catch is opened.

In addition, in the generic state of the art according to DE 10 2006 012 956 A1 describes a motor vehicle door lock, which has two rotatably mounted rotary traps. In addition, a rotary actuating this each pivoting and latching locking element respectively a pawl is provided. This should be the triggering forces of the rotary latch lock to open and close as low as possible. The prior art can not be satisfied in all aspects. Thus, in the case of a comparable motor vehicle door lock according to DE 10 2006 012 105 A1, there is the risk that the storage element provided there inadvertently interacts with the locking mechanism or the rotary latch during the normal closing operation of an associated motor vehicle door, thereby preventing the locking pawl from coming in. That is, when the door slamming and any spring movements of the pawl can cause the known memory element effectively holds the pawl or

do not let them fall into the catch. This results in any security problems. Here she uses invention.

The invention is based on the technical problem of further developing such a motor vehicle door lock that the closing process is improved and in particular the engagement of the pawl in the rotary latch is ensured under all circumstances, also and in particular with additionally realized storage element. In addition, a weight optimized embodiment will be presented.

To solve this technical problem, a generic motor vehicle door lock in the invention is characterized in that the pawl is formed in two parts with a first pawl element and a second pawl element, which are movably connected to each other.

According to an advantageous embodiment, the two pawl elements can be mounted gleichachssig in the lock case. In principle, of course, a storage of the two pawl elements on different and divergent axes in the lock case is possible and is encompassed by the invention. Either way, it is essential that the two pawl elements are movable relative to each other and have a movable connection with each other. As a result, a weight saving at the same time sufficient stability is achieved. Because the individual latch elements typically assume different and different functions from each other.

Thus, it has proven useful at first, when the two pawl elements are mounted together with at least partial longitudinal overlap in the lock case. Of particular importance is the fact that the two pawls

elements be interpreted differently. The first pawl element is typically designed as a cover pawl, whereas the second pawl element acts as a base pawl or designed. Mostly, the base pawl has a multiple of the mass of the Abdeckklinke. Here, mass ratios have proved favorable, according to which the base pawl, for example, has three times, five times, ten times or even more of the mass of the cover.

In this way, the design can be made so that only one of the pawl elements is acted upon during the closing process of the locking mechanism. The other pawl element in contrast remains at rest or essentially at rest. In this case, one usually proceeds in such a way that only the basic pawl experiences an admission during the closing process of the locking mechanism. On the other hand, taking into account this interpretation, the other pawl element or the Abdeckklinke remains essentially at rest.

This design is of particular importance in the event that the locking mechanism is equipped with a storage element. Such memory elements are known in principle, for which reference should be made to the Applicant's DE 10 2006 012 105 A1, which has already been acknowledged in the introduction. As described therein, the storage element ensures that the pawl is held in the raised position until the catch is opened. In this way, any interactions of the pawl with the catch are prevented during the opening process, so that the pawl can not inadvertently hold the catch in the respective opening process or generally with this an interaction.

In the context of the invention, the storage element also ensures that the pawl is held in the raised position. For this purpose,

the storage element acts with the catch, typically during an opening process of the locking mechanism. It has proven useful if the storage element is formed on the lock housing. As a result, the design can be made so that only the Bäsisklinke falls into the catch during the closing process of the locking mechanism. In contrast, the cover latch and with it the storage element retains its or its position. Thus, it does not come with the described closing operation that the pawl is transported in cooperation with the existing storage element by any Nachfedervorgänge the pawl in a storage position. Rather, keep the cover and with her the memory element their incident position in the described closing operation of the locking mechanism, because in this case only the basic pawl acceleration and Nachfedervorgängen subject.

On the other hand, during the opening process of the locking, the memory element unfolds its known and desired function. Because the memory element ensures that the pawl is held in the raised position until the catch is (fully) open. For this purpose, the storage element may interact with a guide contour on the rotary latch. Once the catch is pivoted to its opening position, interacts with the further opening the guide contour with the memory element and this ensures overall that the pawl is held as desired in the raised position compared to the catch.

An embodiment which is particularly advantageous for reasons of noise optimization provides that the catch has a noise damping contour on the pawl side.

In this way, it comes according to the invention, or at most at the end of a closing and / or opening movement to a contact: metal-metal. In fact, predominantly material pairings in the sense of metal-plastic are observed within the scope of the invention, so that closing noises and / or opening sounds are not or almost impossible via structure-borne noise via the lock case, the motor vehicle door finally reach the passenger compartment and are perceived as disturbing here.

As a result, a motor vehicle door lock is provided, which has a two-part pawl. In fact, the pawl is composed of a base pawl and a cover latch as intended two-pawl elements together. The basic pawl and the cover take on different functions. While the basic pawl predominantly fills the securing function of the locking mechanism by striking primarily or first into the catch, namely into a preliminary catch contour or main catch contour provided there, the cover pawl serves for the memory element to engage the base latch when the vehicle door is slammed shut in the catch can not prevent unintentionally. For this purpose, the storage element may be connected to the lock housing. The storage element ensures that the pawl is held in the opening operation of the locking mechanism in excavated position, consequently, the opening movement of the catch is not hindered by the optionally incident pawl, and that on further opening by a contour of the catch, the storage element is moved from its storage position and Thus, both pawl parts can be stored on the guide contour of the rotary latch.

All of this succeeds in consideration of a cost-effective and, at the same time, weight-optimized design, with special consideration being given to aspects of noise damping. Because the catch has a noise damping contour that may act as a guide contour at the same time and can be designed as a plastic coating. The noise damping contour or guide contour typically interacts with the memory element and / or also with the pawl, so that noise developments during the opening and / or closing operation are reduced to a minimum. Here are the main benefits.

In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment; show it:

Fig. 1 and 2 the motor vehicle door lock according to the invention fragmentary in a partially exploded view, the motor vehicle door lock of FIG. 1 in plan view during a closing operation of the locking mechanism, the motor vehicle door lock with closing locking in a perspective between pre-locking position and main detent position, the motor vehicle door lock at an indicated opening process.

In the figures, a motor vehicle door lock is shown, which is equipped as usual with a locking mechanism 1, 2, 3 of essentially rotary latch 1 and pawl 2, 3. In addition, one recognizes a lock case 4, which to

Storage of the locking mechanism 1, 2, 3 is used. With the aid of the locking mechanism 1, 2, 3, a locking bolt 5 indicated only in FIGS. 3 and 4 can be caught. The locking pin 5 is connected as usual to a motor vehicle door not explicitly shown.

The pawl 2, 3 may be lifted by means of an indicated only in Fig. 3 operating lever mechanism 6 of the catch 1. Once the pawl 2, 3 has been removed from the catch 1, the catch 1 can open spring-assisted and release the previously captured locking pin 5 in the usual manner. This then also applies to the connected to the locking pin 5 motor vehicle door.

In the context of the invention, the pawl 2, 3 designed in two parts or two parts. For this purpose, the pawl 2, 3 has a first pawl element 2 and a second pawl element 3. Both pawl elements 2, 3 are mounted coaxially in the lock case 4. That is, both pawl elements 2, 3 pivot about the common axis or axis of rotation 7. This common axis 7 for the two pawl elements 2, 3 is defined by a common bearing bushing 7. The bearing bush 7 is anchored in the lock case 4 made of metal. In contrast, the bearing bush 7 is made as such in the embodiment of plastic.

2 and 3 it can be seen that the two pawl elements 2, 3 are mounted together with at least partial longitudinal overlap in the lock case 4, namely with the aid of the already mentioned common bearing bushing 7. In fact, the second pawl element 3 covers the first one Pawl element 2 in about half.

The first pawl element 2 is a covering pawl 2, while the second pawl element 3 is designed as the basic pawl 3. The cover 2 and the base pawl 3 are designed differently material. In the exemplary embodiment, the base pawl 3 is made of metal, whereas the cover 2 is made of plastic. In this way, it is also explained that the two pawl elements 2, 3 are each equipped with different mass. In fact, the base pawl 3 has in comparison to the Abdeckklinke 2 via a mass which in the illustrated example, at least five times the mass of the cover 2 or more.

The two pawl elements 2, 3 are designed to be pivotable relative to one another. This ensures their equiaxial bearing on the common axis of rotation 7 or with the help of the common bearing bush 7 made of plastic. In addition, the two pawl elements 2, 3 have a support contour 9 and a latching nose 10, which is best recognized in the perspective illustration according to FIG. The locking lug 10 is arranged on the second pawl element or the base pawl 3 and can interact with an associated latching contour 11, 12 in or on the rotary latch 1. In fact, the rotary latch 1 has two latching contours 11, 12, namely a main latching contour 11 and a pre-latching contour 12.

In order to ensure the relative pivoting of the two pawl elements 2, 3 by a pivoting angle α, the first pawl element 2 is equipped with a recess 13. The recess 13 on the first pawl element 2 interacts with a recess 14 of the second pawl element 3. In principle, the procedure can also be reversed. Then, the second pawl member 3 has the said recess 13, whereas the recess 14 is provided on the first pawl member 2.

The pawl member 3 strikes with a stop surface 19 at a dash-dotted lines in Fig. 2 indicated stop of the pawl member 2 in a relative movement of the two pawl members 2, 3 to each other. In addition, the lock case 4 may provide a further stop for the second pawl element 3 available. In any case, the overall result is a relative and maximum pivoting angle α between the two pawl elements 2, 3, which is shown in FIG. 2 and can assume values in the range of approximately 40 ° to 70 °. In fact, the second pawl element or the basic pawl 3 can be pivoted relative to the first pawl element or the cover pawl 2 between the two positions, as they become clear in the comparison of FIGS. 2 and 4. In addition, the pivot angle α of the two pawl elements 2, 3 is limited by the rotary latch 1, which acts as a stop with a pawl-side latching contour 15 arranged on it. This noise damping contour 15 may be a plastic coating 15 on the otherwise made of metal rotary latch 1. This noise damping contour or plastic coating 15 pawl side of the rotary latch 1 may be molded onto the rotary latch 1 or adhesively or connected via a plug connection with the rotary latch 1.

It can additionally be seen that the recess 13 on the pawl element 2 is equipped with covering surfaces 18. The recess 13 also interacts with a recess of the second pawl element 3. In fact, at this point, inter alia, a stop surface 19 is realized, which rotates on the latch nose 10 on the latch element 3. The stop surface 19 likes on the recess 13

abut as soon as the latch 10 interacts with the Vorrastkontur 12 respectively of the main catch contour 11 of the catch 1.

The interplay between the recess 13 on the first pawl member 2 and the stop surface 19 on the second pawl member 3 ensures that the two pawl members 2, 3 supported by the common spring 16 when engaging in either Vorrastkontur 12 or the main catch contour 11 on the rotary latch 1 to each other be aligned. The catch 1 may be involved here. In any case, an opening of the rotary latch 1 is blocked.

When closing the vehicle door and consequently the indicated in Fig. 4 clockwise rotation of the rotary latch 1 about its axis 17, the locking lug 10 slides on the noise damping contour or plastic coating 15 locking pawl side of the rotary latch 1 along. As a result, no grinding noises or other unpleasant noises are observed. For the pawl element or the cover 2 is made of plastic, which also applies to the noise damping contour 15. Thus, one always observes the combination of materials plastic-metal or plastic-plastic. Only when the pawl element or the base pawl 3 at the end of this process in the main catch contour 11 is incident or applied to this, it comes to a metal-metal contact, so that the closing operation described is associated with a minimum of disturbing noise.

In the normal and previously described with reference to FIG. 4 closing operation of the locking mechanism 1, 2, 3, only one of the pawl members 2, 3 is acted upon, in the embodiment, the base pawl 3. That is, when the locking pin 5, the rotary latch 1 in a clockwise order pivoted their axis 17 as shown in FIG. 4 during the closing process, falls only the

Basic pawl 3 in first Vorrastkontur 12 and then the main locking contour 11 a.

As usual, the memory element 20 ensures that when opening the locking mechanism 1, 2, 3, the pawl 2, 3 is held in the lifted position compared to the rotary latch 1, as will be explained in more detail below. In the closing process shown in Fig. 4 and the associated slamming of a motor vehicle door, which carries the locking pin 5, now falls only the basic pawl 3 in the catch 1 as described after it was moved along the guide contour 15 a. In contrast, the Abdeckklinke 2 assumes its original position as shown in the figure.

During the opening process according to FIG. 5, the pawl 2, 3 is lifted off the catch 1 by an opening movement already indicated in FIG. 4 by an arrow. In this case, the cover 2 takes substantially the base pawl 3 with. Both pawls 2, 3 move away from the catch 1. The catch 1 can then pivot in a spring-assisted manner about its axis 17 in a counterclockwise direction and at the end of this movement take up its open position and release the previously latched striker.

Thus, in this process, the pawl 2, 3 not unintentionally - again - is incident in the catch 1, the memory element 20 ensures that the pawl 2, 3 is held by the rotary latch 1 in the raised position. For this purpose, the memory element 20 interacts with the already mentioned cams of the noise damping contour 15. That is, the memory element 20 interacts with this cam contour 15 on the rotary latch 1. This occurs at least at the end of an opening process of the locking mechanism 1, 2, 3rd

Claims

A motor vehicle door lock, comprising a locking mechanism (1, 2, 3) consisting essentially of a catch (1) and a pawl (2, 3), and a lock box (4) for mounting the locking mechanism (2, 3), characterized in that Pawl (2, 3) in two parts with a first pawl element (2) and a second pawl element (3) is formed, which are movably connected to each other.

2. Motor vehicle door lock according to claim 1, characterized in that the two pawl elements (2, 3) are mounted coaxially in the lock case (4).

3. Motor vehicle door lock according to claim 1 or 2, characterized in that the two pawl elements (2, 3) are mounted together with partial longitudinal overlap in the lock case (4).

4. Motor vehicle door lock according to one of claims 1 to 3, characterized in that the two latch elements (2, 3) are designed differently in mass.

5. Motor vehicle door lock according to one of claims 1 to 4, characterized in that the first pawl element (2) as a cover pawl (2) and the second pawl element (3) is designed as a base pawl (3).

6. Motor vehicle door lock according to claim 5, characterized in that the base pawl (3) has a multiple of the mass of the Abdeckklinke (2), for example, three times, five times, ten times or even more.

7. Motor vehicle door lock according to one of claims 1 to 6, characterized in that during the closing operation of the locking mechanism (1, 2, 3) only one of the pawl members (3) is acted upon,. While the other pawl member (2) remains substantially at rest and Both latch elements (2, 3) are acted upon during the opening process

8. Motor vehicle door lock according to one of claims 1 to 7, characterized in that during the closing operation of the locking mechanism (1, 2, 3), only the basic pawl (3) undergoes a loading.

9. Motor vehicle door lock according to one of claims 1 to 8, characterized in that the locking mechanism (1, 2, 3) is equipped with a storage element (20).

10. Motor vehicle door lock according to claim 9, characterized in that the storage element (20) with the Abdeckklinke (2) interacts to hold the pawl (2, 3) in the raised position.

11. Motor vehicle door lock according to one of claims 1 to 10, characterized in that during the closing operation of the locking mechanism (1, 2, 3) only the B ^' asisklinke (3) along a guide contour (15) of the rotary latch (1) is moved and in the Rotary latch (1) occurs while the cover latch (2) and with it the storage element (20) maintain their position.

12. Motor vehicle door lock according to one of claims 1 to 11, characterized in that during the opening process of the locking mechanism (1, 2, 3) the storage element (20) holds the pawl (2, 3) in the excavated position until the catch (1 ) is open.

13. Motor vehicle door lock according to one of claims 9 to 12, characterized in that the storage element (20) interacts with a cam of the guide contour (15) on the rotary latch (1).

14. Motor vehicle door lock according to one of claims 1 to 13, characterized in that the rotary latch (1) has a Sperrklinkenseitig a Geräuschdämpfungskpntur (15).