EP4544133A1 - KRAFTFAHRZEUG-SCHLIEßEINRICHTUNG - Google Patents
KRAFTFAHRZEUG-SCHLIEßEINRICHTUNGInfo
- Publication number
- EP4544133A1 EP4544133A1 EP23727920.3A EP23727920A EP4544133A1 EP 4544133 A1 EP4544133 A1 EP 4544133A1 EP 23727920 A EP23727920 A EP 23727920A EP 4544133 A1 EP4544133 A1 EP 4544133A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lock case
- locking mechanism
- motor vehicle
- leg
- lock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- E05B83/00—Vehicle locks specially adapted for particular types of wing or vehicle
- E05B83/16—Locks for luggage compartments, car boot lids or car bonnets
- E05B83/24—Locks for luggage compartments, car boot lids or car bonnets for car bonnets
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B83/00—Vehicle locks specially adapted for particular types of wing or vehicle
- E05B83/16—Locks for luggage compartments, car boot lids or car bonnets
- E05B83/24—Locks for luggage compartments, car boot lids or car bonnets for car bonnets
- E05B83/243—Hood clamps, i.e. individually actuated, usually yielding hooks
-
- 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
- E05B85/02—Lock casings
Definitions
- the invention relates to a motor vehicle locking device, in particular a motor vehicle lock and preferably a motor vehicle hood lock, with a locking mechanism consisting essentially of a rotary latch and a pawl, and with a lock case for storing the locking mechanism, the lock case reacting to attacking and acceleration-related forces, for example in the event of a crash, is designed to be deformable.
- a motor vehicle and consequently also the associated motor vehicle locking device are subject to large accelerations or decelerations, which correspond to values of several 10 g with g of the acceleration due to gravity.
- both the lock case and the locking mechanism essentially consisting of a rotary latch and pawl, are usually made of metal and in particular high-strength steel.
- the motor vehicle locking device must ensure that doors, hoods or flaps secured against a body, for example, remain closed in order to prevent people from being thrown out of the motor vehicle, for example.
- safety devices arranged there such as side airbags, side impact protection, etc., can have an effect on protecting the vehicle occupants.
- the lock case is equipped with at least one connecting web, which projects into a receptacle of an additionally provided reinforcing element.
- the connecting bar engages with the surrounding receptacle with a predetermined amount of play in order to limit any deformations.
- the state of the art has basically proven itself, but is structurally complex and requires additional manufacturing and processing steps through the additional reinforcement or connecting plates and reinforcement elements.
- the invention as a whole aims to provide a remedy here.
- the invention is based on the technical problem of further developing such a motor vehicle locking device in such a way that high acting forces, for example in the event of a crash, can be controlled easily and cost-effectively without additional design effort.
- a generic motor vehicle locking device within the scope of the invention is characterized in that, from a certain force, the deformable lock case contacts the locking mechanism to increase a common moment of resistance.
- the invention is initially and very generally based on the knowledge that, for example, forces associated with a crash and acting on the motor vehicle locking device can typically lead to the locking mechanism being deformed. This can be attributed to the fact that when the associated motor vehicle door or motor vehicle hood or motor vehicle flap is closed, a locking bolt attached to the relevant door, hood or flap is held in the closed position of the locking mechanism by the rotary latch, with the rotary latch in turn being supported the pawl is locked. If forces caused by an accident act on the locking mechanism in question in its closed position, these typically ensure that the rotary latch in particular and the locking mechanism as a whole are deformed via the locking bolt.
- the attacking forces usually result in tearing forces that act on associated bearing pins, with the help of which the rotary latch or pawl is mounted on or in the lock case.
- the anchoring of the bearing domes counteracts the forces with a certain moment of resistance, which is structurally provided by the locking mechanism.
- this moment of resistance which is opposed by the locking mechanism to the tearing forces acting, can now be increased by the fact that from a certain force (and typically associated with the crash) the deformable lock case is applied to the locking mechanism to increase the common moment of resistance.
- the attacking force not only deforms the locking mechanism or causes tearing forces to act on the bearing domes, but it also comes from a certain attacking force in addition to deforming the lock case.
- the deformation of the lock case is adjusted so that the deformed lock case rests against the locking mechanism.
- the common resistance moment is increased, which results from the resistance moment of the locking mechanism plus that of the lock case.
- forces can be absorbed and controlled using the motor vehicle locking device according to the invention, which are significantly higher than those that can be absorbed by the locking mechanism alone. This can be attributed to the combinatorial effect of the locking mechanism including the lock case in the event of a crash.
- the locking mechanism and the lock case are spaced apart from one another, because otherwise a friction-free operation of the locking mechanism during pivoting movements relative to the lock case around the respective bearing dome would not be possible.
- the locking mechanism is deformed and, on the other hand, above a certain force threshold, the lock case is also deformed, in such a way that the deformation causes the lock case to reach the distance in normal operation overcomes the locking mechanism and attaches itself to the locking mechanism.
- the locking mechanism experiences an additional stiffening, so to speak, and the locking mechanism and lock case work together, so that overall the desired increase in the now observed joint moment of resistance of the locking mechanism and lock case occurs. All of this is possible without additional design measures such as reinforcing elements, reinforcing plates, etc., simply by adjusting the deformation of the lock case so that it (the deformation) is so great above a certain threshold for the attacking force that, for example The associated bulges in the lock case reach the locking mechanism and thus stiffen it. This is where the main advantages can be seen.
- the design is additionally such that the locking mechanism can be deformed up to a first force limit and, together with the likewise deformable lock case, reaches a higher second force limit.
- the first force limit can reach values of approximately 4 kN to 6 kN and preferably 5 kN.
- the second, higher force limit in contrast, corresponds to values of more than 9 kN to approximately 12 kN and preferably to values of approximately 10.5 kN.
- the locking mechanism is initially deformed until the first force limit is reached and is alone able to absorb the forces acting in the event of a crash, for example.
- the lock case is deformed to such an extent that it rests against the locking mechanism and additionally stiffens it.
- the combination of the deformed lock case and the resulting stiffened locking mechanism can now absorb forces up to the second force limit. This means that practically all crash situations and the associated crash forces can be controlled without any special design measures, without any unwanted door opening or flap opening or hood opening occurring.
- hood of the front hood of a motor vehicle in the event of a crash must be avoided at all costs for several reasons.
- the hood is needed in order to be able to act as a “crumple zone” together with other structural elements of the body in the event of a frontal crash.
- a hood that opens uncontrollably in the event of a crash can not only impair the driver's view, but can even flip over and destroy a windshield, thereby posing an additional danger to vehicle occupants.
- assuming and maintaining the closed position in the event of a crash is also important is particularly important for front hoods. The same applies to tailgates and side doors anyway.
- the design is also such that the joint deformability of the locking mechanism in contact with the lock case and the lock case corresponds to an increase in the absorbable force of at least 50% and preferably 70% or more compared to the force absorption by the locking mechanism alone. That is, the combinatorial effect of the deformed lock case i. V. m. using the locking mechanism to stiffen it means that the forces that can be absorbed by the locking device according to the invention can be increased by at least 50% and preferably by 70% compared to the situation in which the lock case is not used for additional stiffening of the locking mechanism.
- the lock case takes on the function of additional reinforcing elements, as described in the prior art and which are obsolete according to the invention, due to its deformation in the event of a crash.
- the design is such that the lock case and the rotary latch overlap when viewed in order to increase the joint moment of resistance, so that the deformed lock case rests against the rotary latch when a certain force threshold is exceeded and thus after a corresponding deformation and stiffens it.
- the lock case is equipped with at least one guide element for mutual guidance relative to the rotary latch in the event of deformations. That is, the guide element ensures that the deforming lock case is guided, as it were, in relation to the rotary latch during its deformation process and the desired contact with the rotary latch occurs.
- the guide element is designed as a fold on the typically metal lock case.
- the lock case and the locking mechanism are made of high-strength steel.
- the guide element engages over a stop leg of the rotary latch.
- the rotary latch usually has the relevant stop leg and a catch leg, which lie opposite each other and between them describe an inlet mouth for the locking bolt.
- the lock case is L-shaped in cross section with a long L-leg and a short L-leg.
- the long L-leg is generally designed so that it forms a deformable impact plate that runs transversely to the longitudinal extent of an associated vehicle.
- the short L-leg describes a fastening plate coupled, for example, to a cross member of the motor vehicle.
- the short L-leg or the fastening plate implemented at this point generally ensures that the lock case is secured to the cross member of the motor vehicle.
- the long L-leg and the deformable impact plate implemented at this point act as a stiffener that can be applied to the locking mechanism in the event of a crash.
- the locking mechanism is usually mounted on the impact plate in question, whereas the mounting plate ensures that it is secured to the cross member of the motor vehicle.
- a motor vehicle locking device which is able to absorb and control the forces that occur in the event of a crash in particular in a strikingly simple manner.
- the Everything is achieved without the need for additional reinforcing plates or reinforcing elements, simply because in the event of a crash, the resulting deformed lock case rests against the locking mechanism for stiffening purposes. This is where the main advantages can be seen.
- Fig. 1 the motor vehicle locking device according to the invention in an overview
- Fig. 2 shows a force-time diagram schematically, which shows the course of an accident.
- FIG. 1 shows the motor vehicle locking device according to the invention, reduced to the essential elements.
- FIG. 1 shows the motor vehicle locking device, which according to the exemplary embodiment is designed as a motor vehicle lock and specifically as a motor vehicle hood lock.
- the motor vehicle hood lock shown in FIG. 1 it is possible to lock a front hood 1 of a motor vehicle, which is only indicated here, and to keep it closed in the closed position of an associated locking mechanism 2, 3.
- the front hood 1 has a locking bolt 4, which is held in an inlet mouth 5 of the rotary latch 2 in the closed position of the locking mechanism 2, 3 shown in FIG.
- the inlet mouth 5 of the rotary latch 2 is formed in that the rotary latch 2 is equipped in a fork-shaped manner with a stop leg 2a and a catch leg 2b.
- an ejector element 6 can be seen, which has no particular significance for the following considerations.
- the ejector element 6 is mounted on the same axis as the pawl 3.
- the rotary latch 2 has a spaced apart from it Storage. In both cases, storage is provided by respective bearing domes, which are anchored in a lock case 7 supporting the locking mechanism 2, 3.
- the lock case 7 is designed to be deformable in response to attacking and acceleration-related forces F, for example in the event of a crash.
- the forces F in question are those which correspond, as shown in FIG. 1 and, for example, to a frontal impact, i.e. run in the longitudinal direction
- the lock case 7 is L-shaped in the exemplary embodiment and in cross section with a long L-leg 7a and a short L-leg 7b.
- the long L-leg 7a defines a baffle plate of the lock case 7.
- the locking mechanism 2, 3 (and also the ejector element 6) are mounted on the long L-leg 7a or the baffle plate provided at this point.
- the short L-leg 7b and the fastening plate implemented at this point serve to ensure that the lock case 7 can be fixed to a cross member of a motor vehicle (not shown in detail), which is only indicated in FIG.
- a time course of the force F in question is shown in the diagram according to FIG. 2. It can be seen that up to a first force limit Fi predominantly the locking mechanism 2, 3 is increasingly deformed. In the area of this force limit Fi, the lock case 7 as a whole is also deformed by the acting force F. This is particularly true for the long L-leg 7a, which defines the baffle plate. That is, from a certain force F, which may lie in the area of the first force limit Fi indicated in FIG. 2, the lock case 7 is increasingly deformed, namely in the direction of the locking mechanism 2, 3.
- the deformed lock case 7 increasingly comes into contact with the locking mechanism 2, 3 to increase a common moment of resistance. That is, the deformation of the lock case 7 corresponds to the fact that a distance required in normal operation between the lock case 7 or the long L-leg 7a and the locking mechanism 2, 3 is caused by the deformation of the lock case 7 and in particular the long L-leg 7a is increasingly bridged.
- the deformed lock case 7 rests against the locking mechanism 2, 3 and specifically the rotary latch 2, increasing as the force F increases.
- the locking mechanism 2, 3 is stiffened by the combinatorial effect together with the deformed lock case 7.
- the overall design is such that the locking mechanism 2, 3 can be deformed up to the first force limit Fi and, together with the lock case 7, which can also be deformed, a higher second force limit F2 is achieved, as can be seen directly from the force-Z-time diagram according to FIG can understand.
- the first force limit Fi is approximately 4 to 6 kN, whereas values of more than 9 kN to approximately 12 kN are observed for the second force limit F2.
- the joint deformability of the locking mechanism 2, 3 located in contact with the lock case 7 and the lock case 7 leads to an increase in the force F resulting from the frontal impact by at least 50% compared to the situation in which the locking mechanism 2, 3 is used to absorb force alone.
- the design is also such that the lock case 7 or its long L-leg 7a and the rotary latch 2 overlap when viewed from above in order to increase the common moment of resistance.
- the lock case 7 has at least one guide element 7c which serves to mutually guide the deformable lock case 7 and the locking mechanism 2, 3.
- the guide element 7c of the lock case 7 in question is a fold 7c on the metal lock case 7, which can therefore be produced particularly inexpensively and quickly.
- the design is such that the guide element or the fold 7c engages over the stop leg 2a of the rotary latch 2.
Landscapes
- Lock And Its Accessories (AREA)
- Superstructure Of Vehicle (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022115499.8A DE102022115499A1 (de) | 2022-06-22 | 2022-06-22 | Kraftfahrzeug-Schließeinrichtung |
| PCT/DE2023/100348 WO2023246969A1 (de) | 2022-06-22 | 2023-05-12 | KRAFTFAHRZEUG-SCHLIEßEINRICHTUNG |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4544133A1 true EP4544133A1 (de) | 2025-04-30 |
Family
ID=86657238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23727920.3A Pending EP4544133A1 (de) | 2022-06-22 | 2023-05-12 | KRAFTFAHRZEUG-SCHLIEßEINRICHTUNG |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20250369261A1 (de) |
| EP (1) | EP4544133A1 (de) |
| JP (1) | JP2025519860A (de) |
| KR (1) | KR20250027260A (de) |
| CN (1) | CN119403987A (de) |
| DE (1) | DE102022115499A1 (de) |
| WO (1) | WO2023246969A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9915764D0 (en) * | 1999-07-07 | 1999-09-08 | Meritor Light Vehicle Sys Ltd | Latch mechanism |
| DE102005016488A1 (de) | 2005-04-08 | 2006-10-12 | BÖCO Böddecker & Co. GmbH & Co. KG | Vorrichtung zur Festlegung eines ersten Fahrzeugteiles an einem zweiten Fahrzeugteil |
| DE202009010681U1 (de) * | 2009-08-07 | 2009-12-17 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Öffnungs- und/oder Schließmechanismus an Türen, Klappen odg., insbesondere an Fahrzeugen |
| US8657349B2 (en) * | 2011-05-17 | 2014-02-25 | GM Global Technology Operations LLC | Latch assembly for a vehicle |
| DE202012007326U1 (de) | 2012-07-31 | 2013-11-04 | Kiekert Aktiengesellschaft | Kraftfahrzeugtürschloss |
| DE102016218229A1 (de) | 2016-09-22 | 2018-03-22 | Robert Bosch Gmbh | Bremssystem-Steuergerät für ein Fahrzeug |
| DE202017100772U1 (de) | 2017-02-13 | 2018-05-15 | BROSE SCHLIEßSYSTEME GMBH & CO. KG | Kraftfahrzeugschloss |
| DE102019108967A1 (de) | 2019-04-05 | 2020-10-08 | Kiekert Aktiengesellschaft | Kraftfahrzeugtürschloss |
-
2022
- 2022-06-22 DE DE102022115499.8A patent/DE102022115499A1/de active Pending
-
2023
- 2023-05-12 US US18/876,359 patent/US20250369261A1/en active Pending
- 2023-05-12 KR KR1020257001552A patent/KR20250027260A/ko active Pending
- 2023-05-12 EP EP23727920.3A patent/EP4544133A1/de active Pending
- 2023-05-12 JP JP2024575162A patent/JP2025519860A/ja active Pending
- 2023-05-12 CN CN202380048427.6A patent/CN119403987A/zh active Pending
- 2023-05-12 WO PCT/DE2023/100348 patent/WO2023246969A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| KR20250027260A (ko) | 2025-02-25 |
| WO2023246969A1 (de) | 2023-12-28 |
| CN119403987A (zh) | 2025-02-07 |
| JP2025519860A (ja) | 2025-06-26 |
| DE102022115499A1 (de) | 2023-12-28 |
| US20250369261A1 (en) | 2025-12-04 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20241212 |
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| DAX | Request for extension of the european patent (deleted) | ||
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KEJDANA, ALES Inventor name: SUK, JAN |
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| 19U | Interruption of proceedings before grant |
Effective date: 20251201 |
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| 19W | Proceedings resumed before grant after interruption of proceedings |
Effective date: 20270104 |