EP4532875A1 - KRAFTFAHRZEUG-SCHLIEßVORRICHTUNG - Google Patents
KRAFTFAHRZEUG-SCHLIEßVORRICHTUNGInfo
- Publication number
- EP4532875A1 EP4532875A1 EP23728262.9A EP23728262A EP4532875A1 EP 4532875 A1 EP4532875 A1 EP 4532875A1 EP 23728262 A EP23728262 A EP 23728262A EP 4532875 A1 EP4532875 A1 EP 4532875A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- locking
- leg spring
- motor vehicle
- leg
- spring
- 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.)
- Withdrawn
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
- E05B77/36—Noise prevention; Anti-rattling means
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/12—Power-actuated vehicle locks characterised by the function or purpose of the powered actuators
- E05B81/20—Power-actuated vehicle locks characterised by the function or purpose of the powered actuators for assisting final closing or for initiating opening
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/042—Wound springs characterised by the cross-section of the wire
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/0025—Devices for forcing the wing firmly against its seat or to initiate the opening of the wing
- E05B17/0033—Devices for forcing the wing firmly against its seat or to initiate the opening of the wing for opening only
- E05B17/0037—Spring-operated
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/04—Spring arrangements in locks
- E05B2015/0403—Wound springs
- E05B2015/0406—Wound springs wound in a cylindrical shape
- E05B2015/041—Wound springs wound in a cylindrical shape loaded perpendicular to cylinder axis
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/04—Spring arrangements in locks
- E05B2015/0403—Wound springs
- E05B2015/0406—Wound springs wound in a cylindrical shape
- E05B2015/0413—Wound springs wound in a cylindrical shape loaded by compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2236/00—Mode of stressing of basic spring or damper elements or devices incorporating such elements
- F16F2236/08—Torsion
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 leg spring for acting on a locking bolt which interacts with the locking mechanism.
- Motor vehicle locking devices are typically used on or in motor vehicles to lock doors, flaps, hoods, etc., for example, against a motor vehicle body. This is primarily about motor vehicle locks and in particular motor vehicle hood locks, which i. V. m. Front hoods or tailgates are used. On the one hand, there is the problem with front hoods that they tend to make rattling noises due to movements of the motor vehicle or attacking wind, because the locking bolt caught by the rotary latch when the locking mechanism is closed performs relative movements within an inlet mouth of the rotary latch. On the other hand, it is important that such a front hood opens properly.
- the procedure is usually and in practice such that the locking device, for example in its closed position or main locking position, is opened using a handle or an electric motor.
- the leg spring With the help of the leg spring, it is now necessary for the front hood to be moved into a so-called lifting position and at least partially opened.
- the leg spring works on the locking bolts. In the lifting position, a user can grasp the front hood and swing it open through a gap created between the motor vehicle body and the front hood. This sets a sufficiently large and of the one in question Opening torque provided by the leg spring on the front hood.
- front hoods are loaded with additional weight, for example due to snow or ice on them, which may prevent them from taking the lifting position. Accordingly, high opening torques are typically required.
- these high opening moments are provided by an energy storage device which transfers the front hood into its raised position or the lifting position.
- the energy storage can be several leaf springs. This leads to a sprawling structure and a complicated and expensive construction.
- a damping device which has at least one spring element accommodated in a housing or lock housing.
- the spring element can be a leg spring.
- the leg spring works on two jaw elements that can be moved relative to one another and are movably accommodated in the lock housing. With the help of the jaw elements, the locking bolt is pre-tensioned. This is intended to prevent rattling noises from the locking bolt when the locking mechanism is in the closed position.
- the state of the art has basically proven itself, but on the one hand it relies on an expansive and complicated construction and on the other hand it has its limits when it comes to the opening torque provided by the torsion spring.
- 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 it takes into account
- a compact and cost-effective structure provides an increased opening torque compared to the prior art.
- a generic motor vehicle locking device within the scope of the invention is characterized in that the leg spring has a rectangular cross section.
- a variant in which the leg spring has a square cross section is particularly preferred.
- the spring wire with a rectangular or square cross-section has a significantly higher bending moment compared to the spring wire with a round cross-section. Due to this higher bending moment, the leg spring used according to the invention can act on the locking bolt with a significantly higher opening moment after the forming process on its loose leg, which acts directly or indirectly on the locking bolt, compared to the situation in which a spring wire with a round cross-section is used as the starting material. This is where the main advantages can be seen. As a rule, the design is such that the leg spring encloses a bearing dome with its winding section.
- the procedure is usually such that the winding section encloses the bearing mandrel in question with play, so that the two legs extending from the winding section can easily enclose different angles between them. Most often, obtuse angles are observed at this point. That is, the legs adjoining the winding section enclose the relevant obtuse angle between them.
- the obtuse angle between the two legs can have values between more than 90° and 180°. At this point, values for the obtuse angle between more than 120° and 180° and particularly preferably between 150° and 180° are preferably observed. Of course, this only applies as an example and is by no means mandatory.
- the associated locking mechanism changes from its main locking position at approximately 150° to a pre-locking position at approximately 180°.
- This change in angle between the two legs of the leg spring connected to the winding section now corresponds to different opening moments exerted on the locking bolt, which differ from each other by a maximum of 30% in accordance with the explanations above.
- the opening torque exerted by the leg spring according to the invention on the locking bolt is generally a maximum of 30% greater than the opening torque exerted on the locking bolt in the pre-locking position.
- only a maximum deviation of 25% is observed between the two positions mentioned.
- the design is such that the leg spring acts with its loose leg on an ejector lever that acts on the locking bolt.
- the Fixed leg attached to a housing.
- the fixed leg can be connected to the housing in a latching manner.
- the loose leg usually rests on the underside against a contact edge of the ejector lever. The contact edge of the ejector lever is in turn placed against the locking bolt.
- a motor vehicle locking device which, with a simple structure, provides an increased opening torque for acting on the locking bolt compared to the prior art.
- the opening torque acting on the locking bolt or the force acting on the locking bolt in the opening direction is equalized between the main locking position and the pre-locking position of the locking mechanism. According to the invention, deviations in the opening torque or opening force of max. 30% are observed between these two positions.
- the state of the art at this point predominantly works with deviations in the opening torque and thus also the opening force on the locking bolt between the pre-locking position and the main locking position, which can be 50% or more.
- a perfect assumption of the lifting or lifting position of the front hood is observed and at the same time an improvement in the noise behavior because rattling noises are not observed either in the main locking position or in the pre-locking position. This is where the main advantages can be seen.
- Fig. 1 shows the motor vehicle locking device according to the invention in a perspective overview
- Fig. 2A, 2B different positions of the locking mechanism.
- the figures show a motor vehicle locking device which is designed according to the exemplary embodiment and preferably as a motor vehicle hood lock.
- the motor vehicle locking device or the motor vehicle hood lock shown has a locking mechanism 1, 2 consisting essentially of a rotary latch 1 and a pawl 2.
- the further basic structure then includes a leg spring 5 for acting on the locking bolt 3 which interacts with the locking mechanism 1, 2.
- the leg spring 5 has a rectangular cross-section and in particular a square cross-section, as the enlarged section in FIG. 1 makes clear.
- the leg spring 5 in question is made from a spring wire with a rectangular or square cross-section. Steel and especially spring steel are used as the material for the spring wire.
- leg spring 5 Based on the functional positions in Figures 2A, 2B, it can be seen that with the help of the leg spring 5, an opening moment Mo, indicated here by an arrow, is exerted by the leg spring 5 on the locking bolt 3, both in the main locking position of the locking mechanism 1, 2 according to FIG 2A as well as in its associated pre-locking position as shown in Fig. 2B.
- the special design of the leg spring 5 with the rectangular cross-section or square cross-section according to the invention ensures that the relevant opening torque Mo in the main latching position according to FIG. 2A deviates in value from a maximum of 30% compared to the pre-latching position as shown in FIG. That from the leg spring
- opening torque Mo can have values between 3 and
- leg spring 5 encloses a bearing dome 6 with its winding section 5a. At this point, a play between the winding section 5a in question and the bearing mandrel 6 is observed. In this way, the two legs 5b and 5c extending from the winding section 5a can enclose different angles a between them, as can be seen from the illustration in FIGS. 2A and 2B.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lock And Its Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022114138.1A DE102022114138A1 (de) | 2022-06-03 | 2022-06-03 | Kraftfahrzeug-Schließvorrichtung |
| PCT/DE2023/100372 WO2023232186A1 (de) | 2022-06-03 | 2023-05-23 | KRAFTFAHRZEUG-SCHLIEßVORRICHTUNG |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4532875A1 true EP4532875A1 (de) | 2025-04-09 |
Family
ID=86688477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23728262.9A Withdrawn EP4532875A1 (de) | 2022-06-03 | 2023-05-23 | KRAFTFAHRZEUG-SCHLIEßVORRICHTUNG |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4532875A1 (de) |
| CN (1) | CN119452145A (de) |
| DE (1) | DE102022114138A1 (de) |
| WO (1) | WO2023232186A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01299336A (ja) * | 1988-05-27 | 1989-12-04 | Murata Hatsujo Kk | オーバーヘツド・ドアまたはシヤツタ開閉装置用ねじりばね |
| US5011460A (en) * | 1989-03-16 | 1991-04-30 | Nippon Seiko Kabushiki Kaisha | Belt tensioner with elastic damping feature |
| DE102006002338A1 (de) | 2006-01-18 | 2007-07-19 | Witte-Velbert Gmbh & Co. Kg | Beschlag für eine Frontklappe eines Kraftfahrzeuges |
| US20080171622A1 (en) | 2007-01-16 | 2008-07-17 | Holger Schever | Flatband torsion spring and tensioner |
| DE102009021613A1 (de) | 2009-05-15 | 2010-11-18 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Schloss zum Verschließen einer Klappe eines Kraftfahrzeugs mit einer Dämpfungseinrichtung |
| DE102010061518B4 (de) | 2010-12-23 | 2022-03-24 | Witte Automotive Gmbh | Frontklappenschloss |
| US9382735B2 (en) | 2013-09-18 | 2016-07-05 | Brose Schliesssysteme Gmbh & Co. Kg | Motor vehicle lock |
-
2022
- 2022-06-03 DE DE102022114138.1A patent/DE102022114138A1/de active Pending
-
2023
- 2023-05-23 CN CN202380044737.0A patent/CN119452145A/zh active Pending
- 2023-05-23 WO PCT/DE2023/100372 patent/WO2023232186A1/de not_active Ceased
- 2023-05-23 EP EP23728262.9A patent/EP4532875A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023232186A1 (de) | 2023-12-07 |
| DE102022114138A1 (de) | 2023-12-14 |
| CN119452145A (zh) | 2025-02-14 |
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Legal Events
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| STAA | Information on the status of an ep patent application or granted ep patent |
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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: 20241126 |
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| AK | Designated contracting states |
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| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
Effective date: 20250715 |