Device for attaching a lock to a hood or trunk lid, the device comprising a vehicle

Abstract

Device for attaching a lock for a hood or trunk lid to a vehicle, wherein the device comprises a body (1) on which a breakaway clip (4) is arranged, the breakaway clip (4) comprising a device (2) for attaching the lock to the breakaway clip (4), the body (1) having a recess configured to receive the breakaway clip (4), the breakaway clip (4) being arranged in the recess, and the device having a stop for transmitting a compressive force from the breakaway clip (4) to the body (1). The device comprises a vehicle.

Description

[0001] The invention relates to a device for fastening a lock for a bonnet or a trunk lid, and to a motor vehicle comprising the device.

[0002] FR 3 119 812 A1 discloses a lock carrier for fastening a bonnet lock to a body shell of a motor vehicle, wherein the lock carrier has a predetermined breaking point at which the lock carrier fails when a pedestrian impacts the bonnet.

[0003] DE 10 2010 014 078 A1 discloses a locking system for a motor vehicle with a hood. A locking device comprises a first locking part connected to the hood and a second locking part connected to the hood for detachable connection to the first locking part. The opening flap has a first predetermined breaking point that at least partially surrounds the first locking part.

[0004] DE 10 2009 052 223 A1 relates to a carrier with hollow spaces intended for parts of a motor vehicle in the area of ​​a front end of the motor vehicle.

[0005] DE 103 32 365 A1 discloses a body with a substructure, a plate-like body element, and retaining means for holding the body element in a normal position on the substructure with a limited retaining force. A first element and a second element releasably engage with each other. The second element and a third element are displaceable relative to each other under the action of a force exceeding the retaining force. Thus, the body element can be displaced into a retracted position.

[0006] DE 10 2004 062 629 A1 discloses a cover for the front end of a vehicle. The cover is arranged below the front hood and connected to the windshield of the vehicle. The cover has a region below the front hood that can be displaced in the direction of the deformation force acting in the event of a collision.

[0007] A device for fastening a lock for a hood or trunk lid to a vehicle comprises a body on which a breakaway holder is arranged. The breakaway holder comprises a device for fastening the lock to the breakaway holder. The body has a recess designed to receive the breakaway holder, the breakaway holder being arranged in the recess, and the device has a stop for transmitting a compressive force from the breakaway holder into the body. The device represents a lock carrier with a breakaway holder, the breakaway holder being secured against breaking off during normal operation.

[0008] The tear-off holder is preferably connected to the body at a predetermined breaking point at which the tear-off holder detaches from the body when a tensile force acting on the tear-off holder exceeds a defined threshold value.

[0009] Preferably, the predetermined breaking point comprises a predetermined breaking line surrounding the tear-off holder between the body and the tear-off holder.

[0010] The recess extends, for example, from a first end to a second end of the recess, wherein the tear-off holder is arranged at the first end of the recess before tearing, wherein the recess allows the tear-off holder to move away from the predetermined breaking point with a defined immersion depth to the second end of the recess after tearing.

[0011] The immersion depth is preferably between 80 mm and 100 mm, preferably substantially 100 mm.

[0012] It can be provided that the stop comprises a component which is arranged between the body and the tear-off holder, wherein the component is designed to transmit the compressive force from the tear-off holder to the body.

[0013] The component is preferably connected to the body via a toothing.

[0014] The toothing is preferably arranged on a side wall of the recess.

[0015] The component and the tear-off holder preferably have separate bodies.

[0016] The device may comprise a plurality of tear-off holders arranged in the recess or in a plurality of recesses arranged side by side in the body.

[0017] The device may comprise several devices for fastening the lock per tear-off holder.

[0018] It can be provided that the device comprises a plurality of tear-off holders, wherein the device has a stop for each tear-off holder or a common stop for at least some of the plurality of tear-off holders.

[0019] A vehicle may be provided which includes the device.

[0020] Further advantageous embodiments can be found in the following description and the drawing. The drawing shows: Fig. 1 a first perspective view of a lock carrier, Fig. 2 a second perspective view of the lock carrier, Fig. 3 a third perspective view of the lock carrier,

[0021] Fig. 1 shows a first perspective view of a lock carrier. The lock carrier is an example of a device for attaching a lock for a hood or trunk lid to a vehicle.

[0022] In Fig. 1 shows the cutout of the lock carrier to which the lock for the hood or trunk lid, which the lock carrier carries, is screwed.

[0023] The lock carrier comprises a body 1. In the example, the lock carrier comprises two screwing points 2 for the lock. The two screwing points 2 enable the lock to be attached to the lock carrier. The screwing points 2 are each arranged in an area 3 of a tear-off holder 4 of the lock carrier. Fewer than two or more than two screwing points can also be provided. The screwing point or screwing points are an example of a device for attaching the lock to the lock carrier. The screwing point 2 or screwing points 2 can be arranged on a tear-off holder 4. Several tear-off holders 4 can be provided, each having one screwing point 2 or several screwing points 2. The number of screwing points 2 arranged on different tear-off holders 4 can be the same or different.

[0024] The two tear-off holders 4 are connected to the body 1 of the lock carrier via a defined predetermined breaking line 5, which is arranged on an upper side 6 of the respective tear-off holder 4, remote from the respective area 3. The two tear-off holders 4 have a respective defined predetermined breaking line 5 on the upper side 6 of the respective tear-off holder 4. In the example, the predetermined breaking line 5 is designed to run all the way around the respective tear-off holder 4. The predetermined breaking line 5 is an example of a predetermined breaking point at which the tear-off holder 4 detaches from the body 1 when a tensile force pulling away from the body acts on the tear-off holder 4 that exceeds a defined threshold value.

[0025] The two breakaway holders 4 are located in a respective defined recess in the body 1 of the lock carrier. The respective recess provides the respective breakaway holder 4 with an insertion depth 7 down to a lower end of the recess.

[0026] A force at which the tear-off holder 4 detaches from the body 1 at the predetermined breaking line 5 and the immersion depth 7 are dimensioned in the example such that a legal requirement regarding pedestrian protection is met.

[0027] For example, the vehicle that includes the lock carrier is required to meet a statutory or consumer protection requirement for pedestrian protection. In detail, this corresponds, for example, to meeting pedestrian protection requirements in the event of a head impact on the hood or trunk lid.

[0028] For example, this is tested by firing a head impactor at an angle of 50° and 65° at speeds of 35 km / h and 40 km / h, respectively, onto the hood or trunk lid. To dissipate the resulting energy and thus meet the requirements, the hood or trunk lid is designed to be deformable. Furthermore, the hood or trunk lid is forced downward upon impact.

[0029] The lock carrier is dimensioned, for example, such that the two tear-off holders 4 detach from the body 1 upon impact of the head test specimen at angles below 50° and below 65°, at speeds below 35 km / h and below 40 km / h. The lock carrier is dimensioned, for example, such that the penetration depth 7, together with the deformation, allows a total penetration of the head test specimen of up to 100 mm.

[0030] For force transmission, the body has a respective toothing 8 in the respective recess above the respective predetermined breaking line 5 in a side wall of the respective recess.

[0031] In Fig. Figure 2 shows a second perspective view of the lock carrier.

[0032] A component 9 is inserted into the respective recess, extending from the respective predetermined breaking line 5 to an upper end of the recess. The component 9 is fixed to the body via the toothing 8. In the example, the respective component 9 and the respective tear-off holder 4 have separate bodies. The toothing 8 and the component 9 are an example of a stop for transmitting a compressive force from the tear-off holder 4 to the body 1.

[0033] For example, when the vehicle is in motion, a high pull-out force acts on the hood due to wind load or operating load. This pull-out force acts on the lock carrier via the respective breakaway bracket 4.

[0034] To ensure that the respective predetermined breaking line 5 does not break due to the pull-out force during driving in these load cases, the pull-out force in the example is introduced from the screwing points 2 directly into the component 9 and from the component 9 into the body 1 of the lock carrier without the predetermined breaking line 5 breaking.

[0035] In Fig. Figure 3 shows a third perspective view of the lock carrier.

[0036] If the hood is hit by a head impact and pushed downwards, the force is transferred to the lock via a locking bar on the hood. By screwing the lock onto the screw points 2, the force is transferred to the breakaway fasteners 4. The resulting increase in tensile force on the respective predetermined breaking line 5 causes the respective predetermined breaking line 5 to tear. Below the breakaway fasteners 4, there is a free path according to the immersion depth 7. After the breakaway fasteners 4 are torn off, the torn-off fasteners 4 can sink downwards and clear the corresponding path.

[0037] The lock carrier solves the conflict of objectives between a high tensile load for the operation of the vehicle, which leads to a high compressive force in the lock carrier, and a low compressive load, which is caused by a head impact and leads to a lower tensile force in the lock carrier compared to the compressive force, which leads to the tearing off and movement of the lock up to e.g. 100 mm.

Claims

[1] Device for attaching a lock for a bonnet or a trunk lid to a vehicle, characterized by that the device comprises a body (1) on which a tear-off holder (4) is arranged, wherein the tear-off holder (4) comprises a device (2) for fastening the lock to the tear-off holder (4), wherein the body (1) has a recess which is designed to receive the tear-off holder (4), wherein the tear-off holder (4) is arranged in the recess, and wherein the device has a stop for transmitting a compressive force from the tear-off holder (4) into the body (1). [2] Device according to claim 1, characterized by that the tear-off holder (4) is connected to the body (1) at a predetermined breaking point (5) at which the tear-off holder (4) detaches from the body when a tensile force acting on the tear-off holder (4) exceeds a defined threshold value. [3] Device according to claim 2, characterized bythat the predetermined breaking point (5) comprises a predetermined breaking line surrounding the tear-off holder (4) between the body and the tear-off holder (4). [4] Device according to one of the preceding claims, characterized by that the recess extends from a first end to a second end of the recess, wherein the tear-off holder (4) is arranged at the first end of the recess before tearing, wherein the recess allows the tear-off holder (4) to move away from the predetermined breaking point (5) with a defined immersion depth (7) to the second end of the recess after tearing. [5] Device according to claim 4, characterized by that the immersion depth (7) is between 80 mm and 100 mm, preferably substantially 100 mm. [6] Device according to one of the preceding claims, characterized bythat the stop comprises a component (9) which is arranged between the body (1) and the tear-off holder (4), wherein the component (9) is designed to transmit the compressive force from the tear-off holder (4) to the body (1). [7] Device according to claim 5, characterized by that the component (9) is connected to the body (1) via a toothing (8). [8] Device according to claim 7, characterized by that the toothing (8) is arranged on a side wall of the recess. [9] Device according to one of claims 6 to 8, characterized by that the component (9) and the tear-off holder (4) have separate bodies. [10] Device according to one of the preceding claims, characterized by that the device comprises a plurality of tear-off holders (4) which are arranged in the recess or in a plurality of recesses arranged next to one another in the body (1). [11] Device according to one of the preceding claims, characterized bythat the device comprises several devices (2) for fastening the lock for each tear-off holder (4). [12] Device according to one of the preceding claims, characterized by that the device comprises a plurality of tear-off holders (4), wherein the device has a stop for each tear-off holder (4) or a common stop for at least some of the plurality of tear-off holders. [13] Vehicle, characterized by that the vehicle comprises the device according to one of claims 1 to 12.

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