EP1500762A2 - Door locking device for vehicle - Google Patents

Abstract

The motor vehicle door catch has at least one ratchet with a rotary latch (1) and locking pawl and at least one shock damping arrangement (10) for the ratchet between them that reduces the relative speed between them. The shock damping arrangement is implemented at the edge of at least one stop surface (5) on the rotary latch and/or the locking pawl.

Description

The invention relates to a motor vehicle door lock, with at least one catch of catch and pawl, and with at least one shock-absorbing means for the locking mechanism, which at least when closing the locking mechanism Effect unfolds.

A motor vehicle door lock of the initially described Design is exemplified in EP 0 336 034 A2, the EP 0 808 978 A2 and DE 23 20 351 A are described. In the Usually the catch has at least one rest, preferably a pre and a main branch in which the Pawl invades. The shock absorber provides during Lock for that, for example, the movement of the Pawl on the catch is quiet. The same applies to an engaging in the catch Mandatory locking bolt, for which EP 0 336 034 A2 also provides a shock absorbing means. A shock absorber, which in the area of the main catch its Effect is unfolded in the abovementioned state of the art Technology not mentioned.

In the known embodiments, it is therefore primary to minimize noise emissions from the ratchet. Such disturbing noises occur especially when closing of the locking mechanism, so that at least then the shock absorbing means Effect unfolds. The state of the art has proven itself in this respect, but is in view of the realized embodiment of the or the shock absorbing means improvement. In particular, it stands out that the case for the motor vehicle door lock or a lock case equipped with the shock absorber (s) becomes. There is thus a need for a vote between on the one hand the housing and on the other hand the locking mechanism in constructive and topological terms. The means, ratchet and housing with the shock absorbers must be coordinated with each other. Here wants the invention provides a total remedy.

The invention is based on the technical problem, a generic motor vehicle door lock so on Develop that noise emissions of the locking system effectively be attenuated while maintaining independence from should be given a particular housing.

To solve this technical problem is a generic motor vehicle door lock in the context of Invention characterized in that the shock absorbing means is arranged between pawl and rotary latch and their relative speed to each other at least Closing the lock reduced.

In the context of the invention, the shock absorbing means on the Pawl and / or be arranged on the catch. It But it is also possible that the shock absorber external, for example, attached to the housing, a boom, etc. is and only when closing the Gesperres between the pawl and the catch finds an arrangement to to reduce their relative speed to each other.

The invention as a whole is based on the knowledge that that in each case at least one stop surface on the rotary latch and the pawl is formed unchanged metallic, although catch and / or pawl a plastic casing can have. This metallic stop surface As a result, it automatically adjusts itself to the fact that the catch and possibly the pawl made of metal, especially steel, are manufactured and over in the As a result of an encapsulation applied plastic jacket have, which releases the aforementioned stop surfaces. The comparably hard surfaces ensure that the support pressures required for safe operation easily transferred between locking mechanism and pawl become. Deformations are therefore not at this point expect.

Closing means in this context the transfer of the Motor vehicle door closing and thus the locking of one open state in a closed. It can the Transfer either manually by simply slamming the with the door lock associated motor vehicle door or through electric motor assisted method of the motor vehicle door respectively. Especially with manual slamming the motor vehicle door and the associated strong Compression of one of the vehicle body assigned elastic door seal is the catch through the Impact on the body-side locking bolt briefly shifted to a so-called overstroke. This Overlift is by an already in main catch of the catch recessed pawl described, the Spaced stop surfaces of the catch and pawl are. The subsequent decompression of the door seal as well possible return devices of the rotary latch ensure that the catch with its stop surface on the Stop surface of the pawl moved to and therefore at Impact of the two stop surfaces as already mentioned disturbing noises occur.

To now especially when closing the Gesperres the "hard" Aufeinanderschlagen the aforementioned abutment surfaces on the one hand on the pawl and on the other hand to reduce the catch or associated metallic To minimize noise, the shock absorbing means according to the invention is used between the pawl and the catch.

It is sufficient regularly, if the shock absorber at the edge of at least one stop surface on the Pawl and / or the catch is realized. Because as soon as For example, the stop surface of the pawl on the one of the catch is moved, provides the shock absorbing means at the edge of a stop surface for it, that the relative speed of the pawl and the Rotary latch is reduced to each other. Refers to the edge in this context on the by the Plastic coating formed area of the stop surface.

When the pawl engages in the forward or main catch the rotary latch slides the stop surface without Shock absorbing means or their edge region on the Shock absorbing along and undergoes due to the increased friction between the metal realized there or the optional plastic coating on the shock absorber the desired deceleration.

The shock absorbing means is usually made of plastic made, wherein a thermoplastic elastomer Polyester-based has proven particularly useful. Compared to the Sliding two steel surfaces together with a friction coefficient of about 0.12 with sliding friction in the prior art In this way, the coefficient of friction can be multiplied. She likes at this point on values for the sliding friction of 0.4 to 0.5 increase, so that therefrom the desired Reduction of the relative speed of rotary latch and Pawl explained to each other.

For the sake of ease of manufacture, one becomes the shock absorber usually in one piece with the already addressed sheath for the catch and / or the Pawl finished. This is the constructive and financial expense minimal. Now to the desired effect To achieve, has the shock absorber over the associated stop surface over a certain height. These Height may be between 0.1 and 1 mm and is preferably about 0.5 mm. In addition, a long service life is ensured and the shock absorber (plastic) is not replaced, for example, it has proven, the shock absorber in cross section, for example web-like, wedge-shaped or spherical perform. A Width between 1 to 10 mm, preferably about 5 mm, provides sure that such detachments and Wear and tear over the entire lock life can be excluded.

Basically, the shock absorber can not designed consistently in the sense of a bridge or wedge be. Just as well can be a variety of shock absorbers realize, for example in the form of a Nubbin row, a corrugation, etc., in turn, the edge the associated stop surface may be arranged.

As a result, the invention as a whole ensures that in closed Condition and operation of the motor vehicle door lock unchanged the respective metallic stop surfaces on the pawl and the catch abut each other. The already described at the beginning high support pressures Make sure that the shock absorber at least partially in the direction of plastic casing is displaced.

It is understood that the shock absorber not only at the edge at least one stop surface on the pawl and / or the catch can be realized, but Beyond this, embodiments are included where the Stoßdämfungsmittel the respective stop surface completely or partially encloses. But always must be assured that after unfolding the support pressures the two metallic abutment surfaces lie against each other. Incidentally, like the shock absorbing means on the catch and the pawl are provided simultaneously, namely each matching or opposite Edge sides of the respective stop surface.

In this way, the previously mentioned coefficient of friction from about 0.4 to 0.5 at a friction between steel and Plastic be increased again. For now, glide regularly two plastics each on top of each other. This results Friction coefficients of significantly more than 0.5 and consequently a further increased deceleration or reduction the relative speed of pawl and rotary latch to each other.

In this regard, the two shock absorbers also on each complementary cross sections (for example in the form of a respective wedge), in addition to the mutual engagement a guide and to achieve centering.

Finally, the plastic sheath in the area of Shock absorbing means preferably in the direction of effect of Pad pressures elastically yielding be designed. That can for example, by an immediately below the Stop surface realized recess or buffer bag be achieved within the plastic jacket. These Make sure that the respective stop surface only partially on the solid material for the catch or the pawl rests and otherwise no support experiences, so can yield elastically. In other words becomes with adjacent metallic stop surfaces of catch and pawl with the buffer bag in the Plastic sheathing an alternative for the Shock absorber created.

This measure also has a positive effect on expected noise emissions.

As a result, a motor vehicle door lock is available its locking mechanism with regard to noise emissions over the prior art with significant Advantages and no other adjustments For example, the lock housing requires. Therefor is essentially the shock absorber between the pawl and the catch, which their relative speed to each other at least reduced when closing the locking mechanism. It will all come with it minimal effort and consequently inexpensive, because the shock absorber usually in one piece with an anyway to be realized plastic casing for the catch and / or the pawl is made.

Although the catch and the pawl when closing the Lock against each other by the shock absorber in their relative speed are braked against each other, is the operation of the locking mechanism in the closed position and not impaired during operation. Because in In this case are still the metallic left Stop surfaces on the one hand pawl and on the other Turntable together. This is the main advantages to see.

Fig. 1

den erfindungsgemäßen Kraftfahrzeugtürverschluss, reduziert auf sein Gesperre,

Fig. 2a und 2b

Detailansichten der Bestandteile des Gesperres und

Fig. 3

einen vergrößerten Querschnitt durch Fig. 1 im Bereich der jeweiligen Anschlagflächen von Drehfalle und Sperrklinke.

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

the motor vehicle door lock according to the invention, reduced to its locking mechanism,

Fig. 2a and 2b

Detailed views of the components of the locking mechanism and

Fig. 3

an enlarged cross section through Fig. 1 in the region of the respective stop surfaces of the rotary latch and pawl.

In the figures, a motor vehicle door lock is shown, the at least one locking mechanism 1, 2 from a rotary latch 1 and pawl 2 features. As usual, the locking mechanism works 1, 2 with an expressly not shown Lock bolt together, which in an inlet mouth of a also not shown housing for the motor vehicle door lock to close the locking mechanism 1, 2 penetrates and here the catch 1 as indicated counterclockwise pivoted. This allows the pawl 2 also perform a counterclockwise movement and assumes the main detent position shown in FIG.

In this main branch or main detent position (as well as in the Nebenrast or Nebenrastposition) are respective stop surfaces 5, 6 on the one hand on the catch 1 and on the other hand to the pawl 2 together. FIGS. 2a 2b and 2b show in detail the relevant stop surfaces 5, 6th

It can be seen that both the catch 1 and the Pawl 2 via a plastic sheath 7, 8 feature. Except for the area near the respective one Rotary axis 3, 4 and any points 9 for example Cover release lever and a lock cylinder lever the respective shells 7, 8, each made of steel manufactured catch and the pawl 2 almost completely from. Only the stop surfaces 5, 6 are in addition for the reasons already described in the introduction kept free. By definition, the sit Stop surfaces 5, 6 while a metallic and a The surface formed by the plastic sheath together.

Order now in the already described closing of the Locks 1, 2 effectively suppress noise emissions, which are essentially explained by the fact that the two metallic abutment surfaces 5, 6 meet or slide along each other, the invention proposes Shock absorbing means 10, 11 for the ratchet 1, 2 before. The Shock absorbing means 10, 11 unfolded at least at Closing the locking mechanism 1, 2 effect, then the primary attenuate occurring metallic noise.

It can be seen in particular with reference to FIGS. 2a and 2b, that the shock-absorbing means 10, 11 between the pawl second and the rotary latch 1 (in the closed position) arranged is. In this case, the shock absorbing means 10, 11 ensures that at least when closing the locking mechanism 1, 2, the relative speed the pawl 2 compared to the catch 1 is reduced. So it comes to a gentle Sliding the two stop surfaces 5, 6 at Close the locking mechanism 1, 2, so that noise emissions be reduced to a minimum.

For this purpose, the shock absorbing means 10, 11 in Frame of the embodiment both on the pawl. 2 and arranged on the rotary latch 1. Actually finds the shock absorber 10 on the rotary latch 1, while the other shock absorbing means 11 part of the Pawl 2 is. In both cases, the respective Shock absorbing means 10, 11 integral with the associated Plastic casing 7, 8 produced and found at the edge of the associated stop surface 5, 6.

It can be seen with reference to FIGS. 2a and 2b that the two Shock damping means 10, 11 on the one hand, the rotary latch. 1 and on the other hand, the pawl 2 opposite in comparison to the respective intermediate stop surface 5, 6 are arranged. But it is also possible, respectively two stop means 10, 11 at the matching To realize edge side and in this context, for example in cross section a wedge shape for the respective Slings 10, 11 to choose. This is shown in Fig. 3.

Either way, the shock absorbing means 10, 11 has a certain height H relative to the associated stop surface 5, 6. This height H may be between 0.1 to 1 mm be. In addition, it has proven itself, the respective Shock absorbing means 10, 11 with a width B between 1 and 10 mm. Basically, at this Do not just make continuous shock absorbers 10, 11 Find use. Just as well have a variety of Shock absorbing means 10, 11 in the form of nubs, Corrugations etc. each edge of the stop surface 5, 6th proven.

To reduce the noise emission contributes additionally, that the respective stop surface 5, 6 elastic in the area the impact damping means 10, 11 is designed compliant. This is achieved by the invention in that below the Stop surface 5, 6 a recess, for example a Buffer bag 12, 13 within the plastic casing 7, 8 is used. Due to this recess 12, 13 is achieved that the respective stop surface 5, 6 not consistently with the solid material of the catch 1 and Pawl 2 is connected, but in so far over Open spaces has, for the said elastic Provide yield. This will be complementary Reduced noise emissions and in particular a hard Aufeinanderschlagen the stop surfaces 5, 6 when closing of the locking mechanism 1, 2 prevented.

Claims (10)

Motor vehicle door lock, comprising at least one catch (1, 2) of rotary latch (1) and pawl (2), and with at least one shock - absorbing means (10, 11) for the locking mechanism (1, 2) arranged between pawl (2) and rotary latch (1) ), which develops at least when closing the locking mechanism (1, 2) effect and in this context the relative speed between the rotary latch (1) and pawl (2) reduced, characterized in that the shock damping means (10, 11) at least one stop surface (5 , 6) on the rotary latch (1) and / or the pawl (2) is realized. Motor vehicle door lock according to claim 1, characterized in that the shock-absorbing means (10, 11) on the pawl (2) and / or on the rotary latch (1) is arranged. Motor vehicle door lock according to one of claims 1 to 3, characterized in that the shock-absorbing means (10, 11) made of plastic and preferably in one piece with a sheath (7, 8) for the rotary latch (1) and / or the pawl (2) is made. Motor vehicle door lock according to one of claims 1 to 4, characterized in that the shock-absorbing means (10, 11) relative to the associated stop surface (5, 6) has a certain height (H). Motor vehicle door lock according to claim 5, characterized in that the height (H) between 0.1 to 1 mm, preferably about 0.5 mm. Motor vehicle door lock according to one of claims 1 to 6, characterized in that the shock-absorbing means (10, 11) in cross-section, for example web-like or wedge-shaped with a width (B) between 1 and 10 mm, preferably about 5 mm. Motor vehicle door lock according to one of claims 1 to 7, characterized in that a plurality of shock-absorbing means (10, 11), for example a row of knobs, a corrugation etc. is realized. Motor vehicle door lock according to one of claims 1 to 8, characterized in that a respective shock-damping means (10, 11) on the rotary latch (1) and the pawl (2) on matching or opposite edge sides of the respective stop surface (5, 6) is provided. Motor vehicle door lock according to claim 8, characterized in that the two shock-absorbing means (10, 11) have complementary cross-sections for mutual engagement. Motor vehicle door lock according to one of claims 1 to 9, characterized in that the respective stop surface (5, 6) is made elastically yielding.

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