EP2932003B1 - Method for producing motor vehicle door locks with a pawl placed in an oblique manner - Google Patents

Description

The invention relates to a method for producing motor vehicle locks with the locking parts catch and pawl, punched in the catch and pawl perpendicular or approximately vertical edges with corresponding locking surfaces of the catch and pawl vorgebend and then provided with free space of the locking surfaces with a sheath. The invention also relates to a motor vehicle lock with a catch and the catch in the locked state locking pawl, wherein the catch and pawl corresponding locking surfaces on the vertical edges resulting from punching and a free locking surfaces have the shroud.

It is known to reduce the creaking noise that occurs when driving the motor vehicle, which can occur between the bar arm and the catch, thereby reducing either the bar arm or the catch in the contact area both provided with a surface structure, which contributes to a reduction of sliding friction. It will be after the DE 10 2010 009 141 A1 on the hanger arm in the contact area obliquely to the longitudinal axis of the stirrup leg extending grooves or corresponding webs applied. These should, as mentioned, reduce the known creaking. Not considered in these different in the DE 10 2010 009 141 A1 disclosed solutions that in the actual production of the bar arms and in particular the locking parts catch and pawl on the corresponding locking surfaces a caging-promoting surface is present. During punching, grooves and grooves are formed on the edge surfaces, which are particularly noticeable during the cutting process Swinging away the pawl into each other and thereby can produce sounds.

Another example of a lock according to the preamble of claim 1 is known from DE 10 2007 060 626 A1 known.

The present invention has for its object to provide a manufacturing method and a motor vehicle lock in such a way that when moving the catch and the pawl against each other, a stick-slip effect hardly or no longer occurs.

The object is procedurally achieved according to the invention in that the catch is mounted with its straight punched contour at the bottom of the lock box housing with the latch surface parallel to the ground, while the pawl is rotated by an angle connected to the bottom of the lock housing.

In such a manufacturing method, the pawl can be mounted so that the grooves or grooves present on the edge surface of the rotary latch and pawl by punching can not engage in the pivoting of the pawl. Rather, both components slide, d. H. Rotary latch and pawl while reducing the sliding friction to each other, so that the noise pollution occurring significantly reduced or no longer exists. The two mutually rubbing locking surfaces are just not over the entire surface together, but only selectively namely where the straight grooves on the catch and the oblique grooves on the pawl touch each other, so where there are overlaps. The invention thus leads to a double effect, namely that the straight grooves produced on production of the two components on the two components can no longer get caught by the inclination of the rotary latch and also that a lower sliding friction occurs because the two grooves allow only selective contact ,

After an expedient development of the invention it is provided that the pawl offset by an angle of 5 - 8 ° pivoting at the bottom of the Lock box housing is set, this angle for a pawl of about 4 mm thickness and a distance of the punching contour in the rotary latch and pawl representing grooves of 0.15 - 0.30 mm validity. With a larger thickness and / or different spacing, another angle results arithmetically, but at most lies in a fluctuation range of 5-15 °. It is advantageous that such an angle with the solution according to the invention, namely the oblique arrangement of the pawl is easy to implement.

In order to realize the staggered arrangement of the pawl without much effort, the invention provides that the bottom of the lock box housing is equipped with a receptacle for the pawl, which is formed obliquely to the ground. The advantage here is that you can work with the previous fasteners, so that only a slight change is required with respect to the lock case, namely to order the pawl offset by said angle on the ground can.

A further expedient possibility of the proposed pawl arrangement is that in which the receptacle of the pawl, while maintaining a conventional connection of the pawl via an oblique bearing surface having recording is connected to the bottom of the lock box housing. By this is meant that when making the lock case housing a corresponding deformation is made so as to achieve the desired receptacle for the pawl, d. H. the oblique shot is from the ground z. B. pushed out.

Another way to arrange the pawl as desired obliquely within the lock case housing is that in which the pawl is framed by a plastic sheath, which is lying flat on the floor of the lock case housing and connected thereto. Plastic is anyway required for the casing, in which case to achieve the staggered arrangement of the pawl simply a targeted casing is made, namely the, which makes the desired oblique arrangement of the pawl within the lock box housing possible.

This oblique placement in the sheath is particularly useful and easy to achieve when the sheath is formed as a rectangular plastic body in which the pawl is held offset by the angle required for the oblique hiring of the punching contour on the locking surface for straight punch contour of the rotary latch detent is. Such a purposeful oblique attitude of the pawl also has montagemäßig advantages, because the flat surface of the casing is easy to arrange on the lock case housing and set there, always the desired angle is maintained, because he is determined by the position of the pawl in the casing.

According to a further advantageous embodiment it is provided that the recording of the catch or the recordings of pawl and rotary latch an offset arrangement against each other resulting be connected to the bottom of the lock box housing. In this arrangement, instead of the pawl, the rotary latch is disposed obliquely in the lock case housing, which ultimately leads to the same effect as in the solution described above. However, it is possible to arrange pawl and rotary latch correspondingly offset within the lock box housing, which can be correspondingly lower due to the staggered arrangement of the angle of the inclined position of the two locking parts to be provided.

According to the device, the object is achieved in that the catch located at the bottom of Schlosskasengehäuses with their trap surface parallel to the ground and the pawl to a predetermined, the meshing of the punching contours of both locking parts preventing angle rotated with the ground the lock box housing is connected. Due to the corresponding inclination or staggered connection of the pawl at the bottom of the lock case housing existing on the locking surfaces of both locking parts grooves and grooves can no longer interlock and hook so to speak, so that even adverse noise is prevented. In addition, the tilted position of the pawl, the punctual contact between the two locking parts, ie the catch and the pawl ensures because namely the two locking parts can only just touch in the overlapping areas of the straight and oblique or inclined grooves and grooves. Due to this advantageous double effect, wear is also minimized in the motor vehicle locks, because it is only the punctual contact of the two locking parts in the area of the locking surfaces that can occur.

It is advantageous if the pawl rotated by 5 - 8 ° is arranged at the bottom of the lock box housing. Such a small angle is sufficient to achieve an overlap at two points of each groove, which is advantageous for a smooth operation of the motor vehicle lock. A further advantage is that such a small angle can be easily achieved and practically can be achieved without significantly changing the overall structure of a motor vehicle lock.

According to an expedient embodiment, it is then provided that the receptacle connecting the pawl to the floor is integrally formed obliquely on the ground or has an inclined bearing surface for the pawl and a conventional connection with the pawl. This also makes it clear that when implementing the invention, only small changes are required that do not hinder the power stroke, ie not hinder the assembly, but only makes a certain change in the forms required, the inclusion of this expediently also in the manufacture of the Bode of the lock case housing can be molded with.

Another way to specify the oblique or staggered arrangement of the pawl on the ground and always to achieve an even effect is that in which the pawl offset by the predetermined angle in the box-shaped and a flat bottom forming casing is fixed. The inclination or staggered arrangement of the pawl is therefore always predetermined and with respect to the connection to the bottom of the lock box housing it may remain in the previous connection, which is to be noted that the casing made of plastic anyway always required, so here incurred only minor reorganization.

Instead of the inclination of the pawl is also the possibility to disclose, after receiving the catch or the receptacle of catch and pawl obliquely resulting arrangement are connected to the bottom of the lock box housing. In the case of the rotary catch, the same fixation will be used as in the case of the oblique position of the pawl, while in the oblique position of the catch and pawl, a correspondingly reduced but opposite inclination is to be realized. The same is easy to realize as explained, especially in that the recording of the catch or receiving the pawl is either mounted obliquely or obliquely formed.

The invention is characterized in particular by the fact that a motor vehicle lock can be created with a markedly low additional outlay in terms of production in which the pawl and rotary latch are designed in the latching area in the region where they are both adjacent to one another or each other so that the previous noise load is significantly minimized is. In addition, a uniform movement of the pawl on the Ratchet ensured along because the existing arrangement of the pawl or possibly also the catch the existing grooves act to each other so that there are only selective overlaps or touches. Above all, however, the corresponding grooves generated during punching can not interlock and lead to harmful noises. For the corresponding oblique or staggered arrangement of the pawl or the other locking parts various possibilities are possible. For example, also form the casing so that it dictates the inclination of the pawl, while the flat bottom of the box-shaped casing part ensures easy connection to the bottom of the lock box housing.

Figur 1

eine Draufsicht auf ein Kraftfahrzeugschloss im Schließzustand,

Figur 2

eine vergrößerte Wiedergabe der Verbindung der Drehfalle mit dem Boden des Schlosskastengehäuses,

Figur 3

eine andere Verbindungsmöglichkeit der schräg gestellten Sperrklinke mit dem Boden,

Figur 4

eine schematisiert wiedergegebene Ansicht der einander gegenüberstehenden Rastflächen von Drehfalle und Sperrklinke und

Figur 5

eine perspektivische Wiedergabe der Drehfalle mit der besonderen Kantenausbildung.

Further details and advantages of the subject invention will become apparent from the following description of the accompanying drawings, in which a preferred embodiment is shown with the necessary details and individual parts. Show it:

FIG. 1

a plan view of a motor vehicle lock in the closed state,

FIG. 2

an enlarged representation of the connection of the rotary latch to the bottom of the lock case housing,

FIG. 3

another possibility of connecting the inclined pawl to the floor,

FIG. 4

a schematized reproduced view of the opposing locking surfaces of the catch and pawl and

FIG. 5

a perspective view of the catch with the special edge formation.

FIG. 1 shows a plan view of a motor vehicle lock 1, in which the rotary latch 2 moving about the axis 3, the bracket leg 9 of the lock bracket 7 comprises.

Here, therefore, the closed state of a motor vehicle lock 1 is reproduced, wherein the catch 2 is secured by the pawl axis 6 about the pawl 5, ie the motor vehicle lock 1 can only be opened again when the pawl 5 is previously pivoted away, which is not reproduced here Handle the vehicle door is possible. The stirrup leg 9 is moved over the receptacle 4 to the deep bottom 27 to the catch 2 and thus secures the closed state of the vehicle door, not shown here, the locking parts 30, 31, ie the pawl 5 and the catch 2 are parts of the vehicle door, while the lock bracket 7 are fixed to the hanger arm 9 on the body of the motor vehicle. The locking parts 30, 31 of the locking mechanism 8 are produced in a preferably multi-part stamping process from corresponding sheets, wherein the surface is characterized by a punched contour 14 at the latching surfaces 12, 13 kept free of the casing 10 initially at both locking parts 30, 31. However, this surface formation is changed in the region of the latching surface 13 in that by the staggered or slightly rotated arrangement of the component, especially the pawl 5, the punching contour 11 forming grooves 18, 19 are inclined and in FIG. 3 are marked accordingly as inclined grooves 18 ', 19'. This punching contour 11, 13 lead to a much more favorable sliding friction between the locking parts 30, 31, so the pawl 5 and the catch 2, so it can not come here to the unfavorable noise nuisance. It is not particularly emphasized that the edges 15, 16 of the rotary latch 2 and the pawl 5 are provided with a plastic sheath 10. The edges 15, 16 are thus covered by such a sheath, only in the region of the locking surfaces 12,13 and the contact surface 20, this sheath 10 is not present, so that there the special surface structure as can be seen from the following figures, take effect can. The surface structure ensures a noise minimization and a sliding friction minimization, whereby both also cooperate.

FIG. 2 shows the region of the locking surface 12 on the rotary latch 2, which must correspond to the locking pawl 5 on opening and closing of the motor vehicle lock 1 with the locking surface 13. This means that both locking parts 30, 31 during the opening and closing of the motor vehicle lock in the region of their locking surfaces 12, 13 to each other or even rub against each other with respect to the edges 15, 16, which in particular in the FIG. 2 17 can then cause problems in the rotary latch 2 with the straight grooves 17, although the locking surface 13 is formed on the pawl 5 the same, ie also should have straight grooves continuously. However, this is not the case that the entire pawl 5 offset by an angle with the bottom 39 of the lock case housing 40 is connected. For this purpose, the bottom 39 has a receptacle 42 which protrudes slightly beyond the bottom 39 or which is achieved by a corresponding deformation. On the parallel to the bottom 39 extending support surface 43 here is a shell 10 performing box 46, in which the entire pawl 5 is arranged correspondingly inclined or obliquely. It is thereby achieved that in the region of the latching surfaces 12, 13, the grooves 18, 19 are now placed obliquely on the pawl 5 and are therefore designated by the reference numeral 18 ', 19'. The aforementioned harmful noises and friction peaks can not occur here. The receptacle 42 has a bore, so that the usual connection 44 between the bottom 39 and pawl 5 can be made.

Instead of the box 46 with the obliquely arranged pawl 5 is at FIG. 3 the bearing surface 43 of the receptacle 42 formed obliquely, so that the pawl 5 receives here by its oblique position when the connection 44 is made. It is also indicated here that the latching surfaces 12, 13 with the straight punched contour 14 and the oblique or inclined punching contour 11 reliably prevent the intermeshing of the grooves 17, 18, 19. Either FIG. 2 as well as FIG. 3 show that this other locking part 31, ie the catch 2 with its trap surface 41st is arranged parallel to the surface of the bottom 39. It is conceivable, but not shown here, that both the pawl 5 as well as the Drehfaffe 2 can get a corresponding inclination, so as to securely prevent the meshing of the straight grooves 17 and the inclined grooves 18, 19, where they offset are inclined to each other.

To clarify the situation is in FIG. 4 once again shown how the locking surfaces 12, 13 of catch 2 and pawl 5 during operation of the motor vehicle lock 1 are superimposed. However, a correspondingly larger angle than required in reality is shown here for clarity. Marked at 25 are the overlaps 25, 25 'wherein the pawl 5 opposite region 37 of the rotary latch 2 is shown in dashed lines, to make it clear that this is not a straight punched contour.

In FIG. 1 the longitudinal axis 38 of the pawl 5 is indicated and also the reference numeral 26 '. This pawl 5 is rotated corresponding to this longitudinal axis to connect to the bottom 39 of the lock case housing 40.

FIG. 5 shows a perspective view of the rotary latch 2, which is pivotable about the axis 3, not shown here. When pivoting the catch 2 of the bracket leg 9, the in FIG. 5 is not shown, introduced into the receptacle 4 and later then released again, so that the vehicle door can then be opened or just closes. In the closed position, the rotary latch 2 is locked by the pawl 5. In FIG. 5 It can be seen that the stamping of the rotary catch 2 produces a clearly recognizable edge 15, the surface of which, as explained further above, is identified by the punched contour 14 on the latching surface 12. This punching contour 14 is in FIG. 5 only hinted. The locking surface 12 indicates the main catch 22, that is, the position in which the pawl 5 prevents the catch 2 in the closed position at a pivoting back. Then, as already mentioned, the locking surface 13 of the pawl 5 on the latching surface 12 of the catch 2 and both can push past each other with reduced friction, without causing the adverse noise, because the straight grooves 17 of the catch 2 and the inclined grooves 18 ', 19' of the pawl 5 not interlock or lock into each other.

In the depth of 27 of the receptacle 4 it can be seen that there is a deviating from the rest of the surface of the edge 15 surface, which is achieved in particular by the fact that here no sheath 10 is present. It can be seen that here also a separate part is inserted to positively influence the sliding action of the rotary latch 2 on the stirrup leg 9.

Claims (12)

1. Method for producing motor vehicle door latches with the locking mechanism elements catch (2) and pawl (5), in which the catch (2) and the pawl (5) are stamped in such a way that vertical or near vertical edges (15,16) with corresponding latching surfaces (12,13) are provided on the catch (2) and pawl (5) after which a coating (10) is applied, not covering the latching surfaces (12,13),
   characterized in that,
   the straight stamped contour of the catch (2) is fixed to the base (39) of the frame box housing (40) with the catch top (41) arranged parallel to the base (39), whilst the pawl (5) is connected to the base (39) of the latch housing (40) offset at a specified angle (26'), said angle preventing the stamped contours (11, 14) of the two locking elements (30, 31) from meshing with each other.
2. Method according to claim 1,
   characterized in that,
   the pawl is pivotally fixed to the base (39) of the frame box housing (40) offset by an angle of 5 - 8°, with this angle (26') applying to a pawl with a thickness of approximately 4 mm and with a distance of the grooves, representing the stamped profile of the catch and pawl, of 0.15 - 0.30 mm.
3. Method according to claim 1,
   characterized in that,
   the base (39) of the frame box housing (40) is provided with a seat (42) for the pawl (5), moulded to the base (40) to form a slope.
4. Method according to one of the preceding claims,
   characterized in that,
   the seat (42) of the pawl (5) is connected to the base (39) of the frame box housing (40) via a seat containing a slanting contact area (43), whilst maintaining a conventional connection of the pawl.
5. Method according to one of the preceding claims,
   characterized in that,
   the pawl is surrounded by a slanting plastic coating, resting flatly on the base of the frame box housing and being connected to said housing.
6. Method according to claim 5,
   characterized in that,
   the coating (10) is a rectangular plastic body (46), in which the pawl (5) is retained offset by an angle (26') required for the slanted adjustment of the stamped contour on the latching surface in relation to the straight stamped contour of the latching surface of the catch.
7. Method according to one or several of the preceding claims,
   characterized in that,
   the seat of the catch or the seats of the pawl and catch are connected to the base (39) of the frame box housing (40) so that they are offset to each other.
8. Motor vehicle door latch containing a catch (2) and a pawl (5), locking the catch (2) in the closed state, in which the catch (2) and pawl (5) contain corresponding latching surfaces (12, 13) on their vertical edges (15,16) produced during stamping and a coating (10) not covering the latching surfaces (12,13),
   characterized in that,
   the catch (2) is positioned on the base (39) of the latch housing (40) with its catch top (41) parallel to the base (39) and the pawl (5) being connected to the base (39) of the frame box housing (40) offset at a specified angle (26'), said angle preventing the stamped contours (1.1, 14) of the two locking elements (30, 31) from meshing with each other.
9. Motor vehicle door latch according to claim 8,
   characterized in that,
   the pawl (5) is arranged on the base (39) of the frame box housing (40) offset by an angle of 5 - 8°.
10. Motor vehicle door latch according to claim 8,
    characterized in that,
    the seat (42) connecting the pawl (5) with the base (39), is moulded on the base (39) at an angle or that it contains an angled contact area (43) for the pawl (5) and a conventional connection (44).
11. Motor vehicle door latch according to one of the above claims,
    characterized in that,
    the pawl (5) is offset by a specified angle (26') and fixed in a box-like coating (10) that forms a level base.
12. Motor vehicle door latch according to one of the above claims,
    characterized in that,
    the seat of the catch (2) or the seat of the catch (2) and pawl (5) are connected to the base (39) of the frame box housing (40) to produce a slanted arrangement.

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