EP2932002B1 - Method for producing motor vehicle door locks with a rolling surface as a locking part contour - Google Patents

Description

Method for producing motor vehicle locks with a rolling surface as a locking part contour

The invention relates to a method for producing motor vehicle locks with the locking parts catch and pawl, in which the rotary latch and the pawl punched out of rolled sheets perpendicular or approximately vertical edges with corresponding locking surfaces of the catch and pawl predefined and then provided with free space of the locking surfaces with a sheath become. The invention also relates to a motor vehicle lock with a catch and a locking latch locking the latch in the closed state, wherein catch and pawl have corresponding locking surfaces on the resulting edges of the locking parts at the free end of the locking parts and these locking surfaces free sheathing.

It is basically known that the creaking noises occurring during the driving of the motor vehicle, which can occur between the bar arm and the catch, can be reduced by providing either the bar arm or the catch in the contact area of both with a surface structure which contributes to a reduction of the sliding friction. It will be after the DE 10 2010 009 2 141 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. But the creaking or the stick-slip effect occurs mainly between the catch and pawl at the main rest, ie the rest in which the pawl prevents the catch from turning back and re-opening the motor vehicle lock. During the subsequent opening process then the pawl on the handle off unscrewed the closed position, wherein the touching locking surfaces of both locking parts rub one another intensively, so that the grooves and grooves formed during punching can lead to a further creaking noise. Even with oblique punching marks after the DE 10 2007 060 626 A1 the adverse noise can not be completely avoided.

The present invention is based on the object to provide a manufacturing method and a motor vehicle lock, in which the creaking between the catch and pawl is avoided.

The object is procedurally achieved in that the locking parts angled after punching in the region of the main catch and / or another rest stanzriefenfreie a contour and then inserted into the lock housing box.

The locking parts, ie both the pawl and the catch are punched out of rolled sheets, so that the surfaces of both locking parts are smooth. The invention makes use of this by at least one of the free ends of the locking parts is angled or bent in the region of the main catch and / or other detent areas, so that then not a free end of a stamped part bears against another free end of a stamped part, but that by the angling of one end of a locking part or both ends now the bent rolled surface of the or the locking parts are adjacent to each other, so that the grooves or grooves having punching contours with the movement of both locking parts can no longer interact with each other. As a result, the described adverse creaking noises can no longer occur and it is also excluded that the free ends with the resulting by punching grooves against each other and then interlock with each other.

According to an advantageous embodiment of the invention, it is provided that a locking part is bent after punching in the region of the main catch and / or another catch and then mounted and brought in the assembled state with the free punched end of the other locking part and thus a straight punched contour in contact , This means that only one free end of a locking part is bent or angled while the other remains so that now the punch-free contour of the angled end is present against the end, which still has the punched contours and the grooves. Due to the bent rolled surface, even with a pronounced punching contour with straight grooves, it is no longer possible for the disadvantageous noises and an aggravation of the movement sequence of the pawl to occur along the rotary latch.

The locking surface of the two locking parts, which come into contact with the movement during the movement or when supporting the catch by the pawl, are greatly reduced in terms of area, as provided according to the invention when bending the free end of the stamped locking part the angled free end slightly curved arcuately about its transverse axis becomes. In this case, the shape of the bend or the arcuate bend can be chosen so that only a small contact surface or just a slightly larger contact surface between the two locking parts remains, depending on how this proves to be useful in one or the other motor vehicle lock.

Another way to reduce the size of the contact surface in the region of the locking surfaces is that, when bending the free end of the stamped locking part, the free end is slightly bent about its longitudinal axis or the free end is milled, so that the center creates a slightly rounded back. Here, too, can be taken into account by the formation of the back of the movement, the milling has the advantage that this results in grooves that are inclined in a certain proportion to the vertical Stamping contour of the other locking part are executed, so that a reduction of the sliding friction is achieved here safely.

According to the device is provided for solving the problem that the locking parts have at their free, a punching contour having end angling, so that their rolled locking member surface is directed against the free end of the adjacent locking member with this in abutment. Such a trained locking part or appropriately trained locking parts make it possible that the catch and the pawl does not come to rest with the punching contour having free ends together, but rather with the rolled locking part surface, the emergence of the due to the smoothness caused by the rolling excludes adverse stick-slip effect.

According to an expedient embodiment, it is provided that the pawl has a punched contour exhibiting free end with an angled portion and the catch a free, directed against the bend and there to plant to bring free end or that the free end of the catch formed on the bend is. Such an embodiment is already useful because the manufacturing cost is reduced, because only one of the two free ends of the locking parts must be angled, while the other free end remains unchanged with its punching contour in action. The remaining on the free end, for example, the rotary latch punching contour is noiseless harmless because the existing grooves of the punching contour easily roll on the smooth surface of the bend or to be able to move grinding. This is true even if only the rotary latch has, for example, an angling, while the free end of the pawl has the disadvantageous punch marks.

In order to enable a suitable bending, it is provided that the pawl is reduced at the free end in the plate thickness and the protruding end piece is bent or angled. Assuming that the pawl is a 4 mm thick component, so would reduce the plate thickness, for example, to about 2 mm at the free end, then to bend or bend the projecting tail, this has the advantage that the pawl then can easily rest on the lock case housing floor.

If such a reduction of the angling is not possible, according to the present invention, the pawl should be associated with a supplementary plate having a height compensating the height of the angled portion. Even with this training so the angling would not affect the positioning of the pawl in the lock case housing, because is wororg for a smooth support of the pawl on the bottom of the lock box housing.

If you want to achieve a smaller contact surface, for example, between pawl and rotary latch, this is possible because the pawl or the rotary latch at the free end have a rolled-off angled. On the one hand thereby the thickness of the possible supplemental sheet can be smaller and on the other hand it is possible, the actual locking surface thus the surface in which catch and pawl touch, continue to reduce, because just just in the strip-shaped longitudinal direction of the rolled angled Contact between the locking parts is possible. By shaping the unrolled bend or its back, the dimensions of the effective bend can be accurately determined.

This is similar even if the bend seen over its length is slightly arcuate, in which case the plant is in the center of the arc and the dimensions of the plant by a size appropriate processing or shaping of the arcuate bend can be achieved and adjusted.

The invention is characterized in particular by the fact that with a small additional manufacturing effort, a motor vehicle can be created in which the pawl and the catch in the rest area so in the area where they are both on or against each other are formed so that the previous noise pollution significantly minimized or completely prevented. In addition, a uniform movement is ensured along the rotary latch, because the existing configuration of the pawl or possibly the catch the existing grooves of the punch contour can not react with each other, because the corresponding punching contour of the two locking parts or both locking parts bent so in another position is brought. The different grooves generated during punching can therefore not interlock and lead to harmful noises. The "exception" of the problematic locking surface of the locking parts from the movement but also has the advantage that the now available locking part surface is particularly smooth, so that the movement between the catch and pawl is favored.

Figur 1

eine Draufsicht auf ein Kraftfahrzeugschloss im geschlossenen Zustand,

Figur 2

eine Seitenansicht einer Sperrklinke mit Abwinklung am freien Ende und zugeordnetem Ergänzungsblech,

Figur 3

die gegenüber Figur 2 bogenförmig ausgebildete Abwinklung des freien Endes der Sperrklinke,

Figur 4

eine Draufsicht auf eine Sperrklinke mit Abwinklung,

Figur 5

eine Seitenansicht einer Sperrklinke mit einer weiteren Ausbildung der Abwinklung und

Figur 6

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

a side view of a pawl with angled at the free end and associated supplementary sheet,

FIG. 3

the opposite FIG. 2 arcuately formed angling of the free end of the pawl,

FIG. 4

a plan view of a pawl with angling,

FIG. 5

a side view of a pawl with a further embodiment of the bend and

FIG. 6

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 shown, wherein the catch 2 is secured by the pawl axis 6 pivotable pawl 5, ie the motor vehicle lock 1 can only be opened again, if previously the pawl 5 is pivoted away, which is not reproduced here Handle the vehicle door is possible. The hanger arm 9 is zoomed over the receptacle 4 to the depth of 27 to the catch 2 and thus secures the closed state of the vehicle door, not shown here, the locking members 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 bracket 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 punching process from corresponding rolled sheets, wherein the surface is characterized by a punched contour 14 at the latching surfaces 12, 13 kept free of the sheath 10 first at both locking parts 30, 31. This surface formation at both free ends 58, 59 of catch 2 and pawl 5 would lead to an influence on the sequence of movements and in particular to noise, because there are just 17 grooves formed by the punching process. The corresponding is in FIG. 2 indicated. At the FIG. 1 apparent embodiment is in the region of the main catch 22, the free end 58 with the locking surface 13 and the straight grooves 17 angled, so that the shown angled 60 arises. Because of this angled portion 60, the rolled locking part surface 11 is now in contact with the latching surface 12 of the rotary latch 2 which has the punched contour 14 with the straight grooves 17. As a result, the described adverse noises can no longer or only to a small extent arise.

It is not particularly emphasized that the edges 15, 16 of the rotary latch 2 and the pawl 5 are provided with a sheath 10. The edges 15, 16 are thus covered by such a sheath 10, only in the region of the locking surfaces 12, 13 and the contact surface 20 between the rotary latch 2 and shackle leg 9, the sheath 10 is not present, so that there the special surface structure as shown in the following Figures can be seen, can be effective. The surface structure ensures a noise minimization and a sliding friction minimization, whereby both also cooperate.

FIG. 2 shows a pawl 5 in side view, which is clear that this pawl 5 is pivotable about the pawl axis 6 in such a way that the pawl 5 can move over the bottom of the lock case housing 40. In the region of the main catch 22 is the free end 59 of the locking member 31 with the punching contour 14 against the free end 58 of the pawl 5, which has an angled portion 60. As a result, the locking part surface 11 rests with its rolled smooth surface against the free end 59 of the rotary latch 2, so that the existing there straight grooves 17 can not adversely affect. Also present on the free end 58 of the pawl 5 straight grooves 17 on the locking surface 13, can not be adversely affected, because they are removed by the angled portion 60 from the region of the contact surface 65.

In order not to hinder the movement of the pawl 5 in the lock housing or lock case housing 40, the pawl 5 is here secured by a supplementary plate 64 having a thickness which corresponds approximately to the height of the angled portion 60.

FIG. 3 shows a particular shape of the bend 60, which is here arcuate, so that a reduced contact surface 65 is formed. This part of the bend can have exactly the locking part surface 61 as the rest of the area or else it is treated separately or formed, for example by a coating. Again, it is clear that the locking surface 13 with the existing straight grooves 17 is harmless, because it is correspondingly far angled. Pawl 5 and supplementary plate 64 move together. In training after FIG. 4 For example, the angled portion 60 is shaped such that an arcuate contact surface 65 is produced, which again entails a reduction of the latching surface 13 (contact surface 65). By size of the bow or its formation and the size of the contact surface 65 between the two locking parts 30, 31 can be varied. FIG. 5 shows a pawl 5, in which the free end 58 has an end piece 62, in which the thickness of the pawl 5 is reduced, so that the bend 60 can be made correspondingly easy. Above all, eliminates the need for a supplementary sheet, because the bend 60 does not extend beyond the bottom 66 of the pawl 5. It is clear that here, too, by the angled portion 60, the smooth, because rolled, locking part surface 61 comes into contact with the latching surface 12 of the rotary latch 2, which has the straight punched grooves 17.

FIG. 6 Finally, shows a perspective view of the rotary latch 2 which is pivotable about the axis 3. 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 freed again, so that the vehicle door can then be opened or just closes. In the closed position to FIG. 1 will the Rotary latch 2 locked by the pawl 5. In FIG. 6 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 characterized in particular by the punching contour 14 on the latching surface 12. This punching contour 14 is in FIG. 6 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 part surface 61 in the bend 60 on the locking surface 12 of the rotary latch 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 on the Rolled Sperreteiloberfläche 61 can not get caught or locked with anything. A smooth Aneinandervorbeischieben is guaranteed, without a separate noise pollution occurs.

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 (10)

1. Procedure to produce motor vehicle latches with the locking parts catch and pawl, whereby the catch and pawl are stamped out of rolled sheet metal with specified vertical or virtually vertical edges with corresponding ratchet surfaces on the catch and pawl and then are equipped with a sheathing while keeping the ratchet surfaces free,
   characterized in that
   after stamping the locking parts are bent in the area of the main ratchet position and/or another ratchet position resulting in a stamping groove-free contour and then are inserted in the latch housing case.
2. Procedure according to claim 1,
   characterized in that
   one locking part is bent and then mounted after stamping in the area of the main ratchet position and/or another ratchet position and in the mounted state is brought into contact with the free stamped end of the other locking part and thus with a straight stamping contour.
3. Procedure according to one of the previous claims,
   characterized in that
   during bending of the free end of the stamped locking part the free end to be bent is slightly deformed around its transverse axis in an arch shape.
4. Procedure according to one of the previous claims,
   characterized in that
   during bending of the free end of the stamped locking part, the free end is slightly bent around its longitudinal axis or the free end is milled off, resulting in a slightly rounded back in the center.
5. Motor vehicle latch with a catch (2) and a pawl (5) which locks the catch (2) in the closed state, whereby the catch (2) and pawl (5) have corresponding ratchet surfaces (12, 13) on the edges formed during stamping of the locking parts at the free end of the locking parts and a sheathing (10) which leaves these ratchet surfaces free,
   characterized in that
   the locking parts (30, 31) have an angular deflection (60) at their free end (58, 59) having a stamping contour (14), so that its rolled locking part surface (61) is to be directed against the free end (58, 59) of the adjacent locking part (30, 31) abutted with it.
6. Motor vehicle latch according to claim 5,
   characterized in that
   the pawl (5) has a free end (58) with a stamping contour (14) with an angular deflection (60) and the catch (2) a free end (59) directed against the angular deflection (60) and to be abutted there or that the free end (59) of the catch (2) is designed possessing an angular deflection (60).
7. Motor vehicle latch according to claim 5,
   characterized in that,
   the pawl (5) has on the free end (58) a reduced sheet thickness and the protruding end piece (62) is bent or deflected at an angle.
8. Motor vehicle latch according to claim 5,
   characterized in that
   the pawl (5) or the catch (2) have a rolled angular deflection (60) at the free end (58, 59).
9. Motor vehicle latch according to claim 5,
   characterized in that
   the angular deflection (60) is slightly arched over its length.
10. Motor vehicle latch according to one of the previous claims,
    characterized in that
    the pawl (5) is assigned to a supplementary metal sheet (64) which has a thickness that offsets the height of the angular deflection (60).

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