Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
  • E05B85/20—Bolts or detents
  • E05B85/24—Bolts rotating about an axis
  • E05B85/243—Bolts rotating about an axis with a bifurcated bolt
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B77/00—Vehicle locks characterised by special functions or purposes
  • E05B77/02—Vehicle locks characterised by special functions or purposes for accident situations
  • E05B77/04—Preventing unwanted lock actuation, e.g. unlatching, at the moment of collision
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B79/00—Mounting or connecting vehicle locks or parts thereof
  • E05B79/02—Mounting of vehicle locks or parts thereof
  • E05B79/08—Mounting of individual lock elements in the lock, e.g. levers

Definitions

• the invention relates to a motor vehicle lock, in particular motor vehicle side door lock, with a lock plate, and with a locking mechanism mounted on the lock plate, consisting essentially of a rotary latch and pawl, at least the pawl being inserted into a bearing opening in the lock plate and fixed therein with the aid of a bearing bolt.
• a motor vehicle lock of the structure described above is the subject of DE 10 2013 111 395 A1.
• the main aim here is to achieve high mechanical stability.
• the known teaching suggests, among other things, that a sheet metal blank of the lock plate is cold formed in such a way that at least one thickened edge area with locally increased sheet metal thickness is produced by a material displacement from at least one storage area of the blank.
• the edge area produced and thickened in this way is usually found in the area of the bearing opening.
• an increased material thickness is made available in this area and, as a result, high forces acting on the bearing pin can be absorbed, so that the mechanical stability of the lock plate is increased overall.
• lock plates are usually made of solid metal and in particular steel.
• lock plates are usually made of solid metal and in particular steel.
• the same typically applies to the locking mechanism and its components.
• the locking mechanism and a lock holder caught by the locking mechanism in the closed state must absorb tearing forces acting on the locking mechanism in connection with the lock case, particularly in extreme situations such as an accident.
• tensile tests are carried out in which the motor vehicle locks are subjected to an accident-like load.
• a bevel is provided which is opposite the inlet slot or inlet mouth and which is formed in the shape of a part of a circle in an opposite end region.
• a motor vehicle lock is made available overall, which can absorb the highest loads with a low weight.
• maximum forces in the transverse direction of the motor vehicle or in the previously mentioned Y-direction of approximately 13.6 kN observed, about 0.05 seconds after the application of force. This has basically proven its worth.
• the known teaching proposes a bolt with the help of which a force can be transmitted from the rotary latch to a lock case.
• the bolt also represents a stop for the rotary latch.
• a reinforcement of the lock case is also provided for absorbing a force transmitted by the rotary latch.
• the reinforcement is designed so that it encloses both an axis of the pawl and an axis of the rotary latch.
• the reinforcement is U-shaped and is supported with its two open ends on a side wall of the lock case.
• a comparable reinforcement or a corresponding reinforcement element is also the subject of DE 20 2012 007 326 U1.
• the reinforcement element is designed as a reinforcement plate coupling both axes of the rotary latch on the one hand and the pawl on the other hand at a distance from the lock case.
• the reinforcement plate provides according to DE 20 2012 007 326 U1 that it provides a bearing cage for the locking mechanism in conjunction with the lock plate, which means that deformation forces can be controlled, especially in the event of a crash. All of this is to avoid an unplanned opening of the locking mechanism.
• tearing tests to simulate the forces already described in the introduction in the transverse direction of the vehicle or in the Y direction it has been shown that, despite such a reinforcing element or reinforcing plate, there is a risk that the pawl in particular with its bearing pin moves in the axial direction.
• the invention is based on the technical problem of further developing such a motor vehicle lock in such a way that the mechanical stability is further increased compared to the prior art.
• the invention proposes in a generic motor vehicle lock that the pawl is equipped with an extension which engages under a hook that limits an axial movement of the pawl.
• the invention thus first of all takes into account the fact that tearing forces occurring in the transverse direction of the vehicle or in the Y direction, in particular in the event of a crash, regularly lead to the pawl giving way axially.
• the hook is now provided according to the invention, which is engaged under by the extension on the pawl and in this way limits the axial movement of the pawl or depending on the design completely prevented.
• the design is also made so that the hook for axially securing the pawl can interact with the extension at least in the main closed position of the locking mechanism.
• the overall design is advantageously such that the hook is connected to the lock plate and, as a rule, represents a deformed part of the lock plate.
• This means that the hook is formed out of the lock plate by a corresponding shaping process and thus represents an integral part of the lock plate.
• a punching process in conjunction with a bending process is usually used at this point.
• the extension usually extends beyond the bearing pin.
• the design is furthermore advantageously made such that the extension extends as an extension of a pawl arm interacting with the rotary latch opposite to the bearing pin. That is, the extension and the pawl arm are opposite each other with respect to the bearing pin located therebetween.
• the bearing pin typically represents an integral part of the pawl. In this way, the pawl including the pawl arm, bearing pin and extension can be produced in one go from, for example, a metal or steel blank. Typically, the pawl then has an additional plastic coating to reduce any noise during operation to a minimum.
• the design is also made such that the extension runs roughly at the same level as the pawl arm.
• the appendix has regularly over a smaller material thickness compared to the pawl arm, namely in a locking level, which is spanned and defined jointly by the rotary latch and the pawl.
• the hook since the hook is part of the lock plate, it has the same strength as the lock plate.
• the extension starting from the bearing pin of the pawl generally has a short length, which consequently corresponds to a short lever arm, with the help of which the bearing pin of the pawl is supported on the hook to limit the axial movement of the pawl, especially in the event of a crash.
• the lever length of the extension compared to the opposite ratchet arm is typically measured in such a way that, in this context, a length ratio of 1: 2 or even more of the length of the extension compared to the length of the ratchet arm is observed.
• the hook is designed like a bridge with lateral legs and a web connecting the legs.
• the web typically has an inward curvature, specifically in the direction of the extension.
• the design is usually made such that the inward curvature extends over a corresponding pivoting range of the extension of approximately 30 ° to 60 °, preferably 40 ° to 50 °.
• the hook is generally arranged on the edge of the lock plate, namely as an extension of the pawl arm (in the main closed position of the locking mechanism).
• the inward curvature of the web mainly ensures the axial securing of the pawl, also and especially in the event of a crash.
• the invention ensures that through the interaction between the hook on the one hand and the extension on the other hand, the pawl within the aforementioned pivoting range of the extension of about 30 ° to 60 ° and preferably 40 ° to 50 ° using the hook properly in the Axial direction is secured.
• the pivoting range of the extension in question usually extends on both sides of a zero line, which is defined by an extension of the ratchet arm, namely in its position in a main detent of the rotary latch and consequently in the main detent position (main closed position).
• the invention is based on the further knowledge that such pivoting ranges are completely sufficient for the basic function of the pawl. Because within the framework of the basic function it is only important that the pawl can fall into a corresponding detent opposite the rotary latch or can be lifted out of the detent to open the locking mechanism.
• a motor vehicle lock is made available which has particularly high mechanical stability, especially in the event of a crash.
• tearing forces can be mastered that clearly exceed the 13.6 kN observed in the prior art and can be up to 18 kN or even more.
• a further increase is possible at this point in that an additional reinforcement plate is realized that overlaps both an axis of the rotary latch and the bearing pin of the pawl. This is where the main advantages can be seen.
• FIG. 1 shows the motor vehicle lock according to the invention in a perspective overview
• the motor vehicle lock is, in the present case and not by way of limitation, a motor vehicle side door lock, that is to say a lock arranged on or in a motor vehicle side door.
• the basic structure of the illustrated motor vehicle lock includes a lock plate 1 and a locking mechanism 2, 3 which is mounted on the lock plate 1.
• a rotary latch bearing pin 4 is implemented, which defines a corresponding axis of the rotary latch 2 for pivoting movements.
• the pawl 3 for its part has a further bearing pin 5, which in the present case is designed as a pawl bearing pin 5 and defines a corresponding pivot axis for the pawl 3.
• the bearing bolt or rotary latch bearing bolt 4 may be anchored in the lock plate 1.
• the bearing pin or pawl bearing pin 5 is formed integrally with the pawl 3.
• the pawl 3 is inserted into a bearing opening 8 of the lock plate 1 with the aid of the bearing pin 5 and is fixed therein.
• the pawl 3 is equipped with the extension 6, which extends beyond the bearing pin 5, ie opposite or in extension of the Locking pawl arm 7.
• the design is such that the extension 6 engages under a hook 9, 10, 11 that limits an axial movement of the locking pawl 3 in the installed state. This applies at least in the main locking position or main locking position of the locking mechanism 2, 3, as shown on the right in FIG.
• FIGS. 1 and 2 A comparison of FIGS. 1 and 2 makes it clear that the hook 9, 10, 11 is connected to the lock plate 1 or represents a deformed part of the lock plate 1.
• the hook 9, 10, 11 is formed on the edge of the lock plate 1, specifically close to the axis compared to the axis of the pawl 3 or adjacent to the bearing pin 5 of the pawl 3.
• the extension 6 extends - as already explained - beyond the bearing pin 5, namely as an extension of the ratchet arm 7 interacting with the rotary latch 1.
• the design is such that the extension 6 is opposite to the ratchet arm compared to the bearing pin 5 arranged in between 7 is arranged and runs.
• the design is such that the extension 6 has a smaller material thickness S compared to the pawl arm 7 in a locking plane spanned by the rotary latch 2 in connection with the pawl 3.
• This can be seen in particular on the basis of FIG. 2.
• the pawl 3 also has a plastic casing 12, which only has metallic areas provided at the end of the pawl arm 7 for interaction with the rotary latch 2 on the one hand and the extension 6 on the other hand, and in particular a head area of the bearing pin 5 is left out.
• the extension 6 runs approximately at the same time as the ratchet arm 7.
• the hook 9, 10, 11 in a front view is like a bridge with lateral legs 9 and one leg 9 connecting web 10 is formed.
• the design is such that the two legs 9 are for the most part perpendicular to the lock plate 1, which extends horizontally on the other hand.
• the web 10 connects the two legs 9 on the head side. Below the web 10, an opening extends which, for example, has been punched out during the deformation process of the lock plate 1 to produce the hook 9, 10, 11, in order to give the two legs 9 and them to enable connecting web 10 and to be able to accommodate the extension 6 of the pawl 3 immersed therein in the assembled state.
• the web 10 is in turn equipped with an inward curvature 11, which can be seen in particular in FIG. 2, namely an inward curvature 11 which extends in the direction of the extension 6 when the pawl 3 is installed.
• the design is such that the inward curvature 11 extends over a corresponding swivel range of the extension 6 of approx. 30 to 60 °, according to the exemplary embodiment 40 ° to 50 °, which a swivel angle a of the pawl 3 shown in FIG. 2 strokes.
• this pivoting range of the pawl 3 extends on both sides, taking into account the associated pivot angle a, starting from a zero line O also shown in FIG. 2, which is described by the pawl arm 7 in the main locking position of the locking mechanism 2, 3 shown.
• FIG. 2 makes it clear that the length h of the extension 6 up to the bearing pin or pawl bearing pin 5 on the one hand and the length h of the pawl arm 7 up to the bearing pin 5 in question are designed differently on the other hand. In fact, a ratio of the two lengths h: l2 of at least 1: 2 is observed at this point.
• the extension 6 and with it the pawl 3 are effectively secured in the event of an axial movement of the bearing pin 5 in the event of a crash, taking into account a short lever arm h and with the aid of the hook 9, 10, 11 a corresponding axial movement suppressed. This applies at least as long as the pawl 3 moves within the pivoting range of the extension 6 predetermined by the angle a, which is the case regularly and in normal operation anyway.
• a reinforcement plate 13 is also implemented within the scope of the exemplary embodiment, which engages over both the bearing bolt or rotary latch bearing bolt 4 and the bearing bolt or pawl bearing bolt 5 and is additionally fixed to the lock plate 1.
• the reinforcement plate 13 has a bracket 13a fixed in or on the lock plate 1.

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• Lock And Its Accessories (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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ID=74235971

Family Applications (1)

Country Status (4)

Citations (7)

Family Cites Families (8)

• 2020
  • 2020-01-07 DE DE102020100146.0A patent/DE102020100146A1/de active Pending
• 2021
  • 2021-01-06 WO PCT/DE2021/100002 patent/WO2021139854A1/de unknown
  • 2021-01-06 CN CN202180009810.1A patent/CN114981514B/zh active Active
  • 2021-01-06 EP EP21701627.8A patent/EP4087994B1/de active Active

Patent Citations (7)

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