EP3194693B1 - Lock for a motor bonnet of a vehicle - Google Patents

Description

The invention relates to a lock for a movable from an open position to a closed position hood of a vehicle with a closing bar in the closed position of the hood retaining latch and a locking hook in the closed position locking pawl. The invention further relates to a use of a lock for a movable from an open position to a closed position hood of a vehicle with a closing bar in the closed position retaining latch and a locking hook in the closed position locking pawl.

With the generic lock, it should be possible to retain an openable body part of a vehicle, such as in particular a hood of the vehicle in its closed position on the associated vehicle body. The lock has for this purpose a closing hook, by means of which when closing the body component, a striker caught and then retained in the closed position of the body component. So that the locking hook can not open unintentionally in the closed position, a pawl is provided, by means of which the locking hook is locked in the closed position. To open the body component then first the pawl must release the locking hook so that this below pivot and in turn can release the striker. In order for the striker to be moved out of the closing hook, it is known to provide an ejection lever on the lock.

For such locks, a so-called Zuziehfunktion is known in which the lock is equipped with an actuator to which a Zuzieh signal can be given via a control unit. By means of the actuator is then actively moved when closing the body component at the end of the closing movement of the locking hooks from a pre-closing position to a full-closing position. With this active movement of the closing hook captured in the closing hook striker is used to the lock and closed in this way, the body part completely. In order to open the lock, the actuator can then actively move the closing hook into an open position. At the same time, the striker is forced out of the closing hook by means of the ejection lever.

It is also known not to actively move the catch, but the striker. For this purpose, the position of the lock is determined by means of a switch or sensor, and the closing hook is actively moved by an actuator in the direction of a closing movement as soon as the striker is caught in the closing hook.

The Zuziehweg this Zuziehsysteme for opening body parts is usually about 6 mm to 8 mm.

Furthermore, the shows EP 2 573 300 A2 a motor vehicle door lock with a rotary latch and a pawl which is movable by a drive element.

In addition, in the US 5 222 775 A an electrically powered lock for a tailgate having a catch and a pawl for rotating the catch.

Further, in the document DE 101 14 065 A1 a door lock described.

Known systems having a movable striker have the disadvantage that a wiring is to be provided for the actuator on the striker. Active closing systems with a movable closing hook are in need of improvement insofar as the body component can be "knocked over" during closing. This means that the closing hook is already brought into its full-closing position by a very firm manual closing of the body component. The actuator then runs behind this movement of the closing hook. If necessary, this "knock-over" can damage the lock, the body component or the surrounding bodywork.

A generic lock of a vehicle is in the DE 10 2010 061 518 A1 described.

It is the object of the present invention to provide a lock for a hood of a vehicle and a use of such a lock in which a so-called "throwing over" of the hood is prevented and an opening of the lock is simplified and at the same time in an accident situation a certain piece of a remaining body is removable.

According to the invention a lock for a movable from an open position in a closed position Moto hood of a vehicle is provided with a closing bar in the closed position of the hood retaining latch and a locking hook in the closed position locking pawl, wherein the pawl in the closing hook blocking the closed position of a pre-closing position is actively movable into a full-closing position.

According to the invention, neither the striker nor the striker is actively moved for the closing function of a lock of a vehicle, but instead the pawl of the lock. When the pawl is actively moved, the locking hook is in the closed position, with the pawl already locking the locking hook in this position. With the active invention Moving the pawl, therefore, also the closing hook is moved and used with this then the striker to the rest of the castle. With this Mitbewegen the closing hook by means of the pawl, the above-mentioned disadvantages of conventional locks are overcome with actively movable locking hook. In particular, the locking hook can swing freely on the pawl according to the invention when closing the hood. Furthermore, it is not harmful in the lock according to the invention, when the hood is closed with great force. It is possible in this case that the locking hook on the pawl moves relative to this, because the locking hook on the pawl yes only latched or behind hook and thus locked in the opening direction. In the closing direction, however, the closing hook can move to a certain extent on the pawl. Damage to the actuator and between the bonnet and the rest of the body can be avoided.

The pawl according to the invention is preferably pivotally mounted on a bearing and the position of the bearing is adjustable by means of an eccentric. The pawl so mounted can be changed or adjusted at its location by means of the eccentric in your position. The eccentric has for this purpose two shaft sections whose shaft axes are arranged eccentrically to each other. One of the shaft sections forms the bearing shaft for the pawl, the other shaft section forms the support shaft for supporting the eccentric on a bearing shell of the lock according to the invention.

Such eccentric is preferably designed self-locking in the full-closed position. The eccentric is thus inhibited in its mobility when it is in or near the full-close position of the hood. The self-locking of the eccentric can be achieved in a simple manner, that this is in this position near its dead center of its rotation. At this dead center, the two shaft sections mentioned are arranged one behind the other, viewed in cross section, in the pulling direction of the pulling force acting on the pawl.

At the lock according to the invention, an ejection lever for moving out the striker from the locking hook is further provided, which is not blocked in the closed position of the pawl. The ejection lever is advantageously resiliently urged against the striker, so that he moves the striker from the locking hook, as soon as this is possible due to an opening movement of the closing hook.

The invention is also directed to a use of a lock for a bonnet of a vehicle which can be moved from an open position to a closed position, with a locking hook which retains a striker in the closed position and a locking catch which locks the striker in the closed position. wherein the pawl is actively moved from a pre-close position to a full-close position in the closed-loop locking position of the closure hook.

As explained, the pawl is actively moved from the pre-closing position to the fully-closed position after the engine hood has been manually closed.

Further, the pawl is advantageously moved back from the full-closed position actively in the pre-closing position as soon as the hood is opened manually.

For manual opening of the hood, a mechanical operating element is preferably used. This control is advantageously a lever which is located in a passenger compartment of the vehicle and can be operated there by the driver of the vehicle. With the inventive movement of the pawl from the full-closing position to the pre-closing position, as soon as the manual opening, this lever can be actively relieved and thus facilitate manual opening.

In addition, the pawl according to the invention is advantageously moved from the full-closing position actively in the pre-closing position as soon as a pedestrian impact situation is detected on the hood. With such, active movement of the pawl to the lock of the invention, the lock hook is released in the event of an accident immediately a certain amount, so that the hood can remove this certain piece of the remaining body. The bonnet thus has more room to move and may be less damaged in a subsequent accident. Such movement of the hood is also particularly advantageous for pedestrian impact protection, in which the hood is additionally actively spent in a flared guard position.

• Fig. 1 eine Vorderansicht eines Ausführungsbeispiels eines erfindungsgemäßen Schlosses in der Vorschließ-Stellung,
• Fig. 2 eine Rückansicht der Vorschließ-Stellung gemäß Fig. 1,
• Fig. 3 die Vorderansicht gemäß Fig. 1 in der Vollschließ-Stellung und
• Fig. 4 die Rückansicht gemäß Fig. 2 in der Vollschließ-Stellung.

The solution according to the invention will now be explained by way of example with reference to the attached schematic drawings. It shows:

• Fig. 1 a front view of an embodiment of a lock according to the invention in the pre-closing position,
• Fig. 2 a rear view of the pre-closing position according to Fig. 1 .
• Fig. 3 the front view according to Fig. 1 in the full-closed position and
• Fig. 4 the rear view according to Fig. 2 in the full-closed position.

In Fig. 1 a lock 10 is shown in which a closing hook 14 is pivotally mounted on a support plate 12. With the locking hook 14, a striker 16 is hooked, on which there is a body component, not shown. The body member is pivotally mounted on an associated body between an open position and a closed position, such as a bonnet or trunk lid, and can be retained by the lock 10 in the closed position on the body.

In order to facilitate the lead out of the striker 16 from the locking hook 14, an ejector lever 18 is pivotally mounted on the support plate 12. Further, a pawl 20 is pivotally mounted on the support plate 12, by means of which the locking hook 14 can be locked with respect to its pivoting movement.

The closing hook 14 is articulated on a pivot axis 22 on the support plate 12 and has an outer hook portion 24 and an inner hook portion 26 with respect to this pivot axis 22. With the outer hook portion 24 of the striker 16 is captured and retained in the half-open state of the closing hook 14. With the inner hook portion 26 of the striker 16 is then taken and completely retained when the lock 10, as in 3 and 4 shown in its fully closed position.

For this purpose, the closing hook 14 has, at its edge region facing the pawl 20, a first nose portion 28 and a second nose portion 30, on which the pawl 20 can optionally hook behind and lock the closing hook 14 in the semi-closed position and in the closed position.

The ejection lever 18 is articulated by means of a pivot axis 32 on the support plate 12 on the opposite side of the lock hook 14 and has a discharge section 34. With this ejection section 34, the ejection lever 18 urges against the locking hook 16 located in the inner hook section 26. When the lock 10 is opened, the striker 16 is thereby forced out of the hook section 26, thus facilitating opening of the lock 10.
The pawl 20 is pivotably connected to the support plate 12 by means of an eccentric 36 which can be actively driven by an actuator (not shown). For this purpose, the eccentric 36 on two opposite sides each have a shaft portion, namely on the side facing the pawl 20 a bearing shaft 38 and on the side facing the support plate 12 a support shaft 40. These two shaft sections, the bearing shaft 38 and the support shaft 40 to each other eccentric, so they are arranged offset parallel to each other. In this case, the support shaft 40 is articulated on the support plate 12 and with a rotation of the eccentric 36, therefore, the bearing shaft 38 and thus also the pawl 20 articulated there is displaced on the support plate 12.

The pawl 20 has a pawl portion 42 with which it hooks to the hook portion 26 when the lock 10 in the semi-closed Location is located. This blocking situation is provided in order to initially retain the body component on the body even if the lock 10 were opened unintentionally.

If the lock 10 in the actual closed position, then the pawl portion 42 hooks on the second nose portion 30 of the closing hook 14 a. This blocking situation of the pawl 20 is referred to here as the closed position.

For this closed position of the eccentric 36 provides two closed positions: In that position in which the bearing shaft 38 is rotated to a maximum of the second nose portion 30, the locking hook 14 is still comparatively wide open (see Fig. 1 and 2 ). This position of the eccentric 38 and thus the pawl 20 is referred to here as the pre-closing position of the castle 10. In this position, the lock 10 is already closed, the associated body component but not yet zoomed up to the adjacent body.

Only with a rotation of the eccentric 36 reaches the bearing shaft 38 to a dead center with a maximum distance from the region of the second nose portion 30 (see 3 and 4 ). At this dead center, which is referred to here as a full-closing position, then the pawl 20 and with it the inner hook portion 26 of the closing hook 14 with respect to the Fig. Pulled upwards so that the striker 16 pulled maximum in the lock 10 and there is restrained. Thus, the associated body component is maximally used to the adjacent body and retained in this fully closed position of the lock 10.

LIST OF REFERENCE NUMBERS

10

lock

12

gusset

14

hasp

16

striker

18

eject lever

20

pawl

22

Swivel axis of the closing hook

24

outer hook section

26

inner hook section

28

first nose section

30

second nose section

32

Swivel axis of the eject lever

34

ejection section

36

eccentric

38

Bearing shaft of the eccentric

40

Support shaft of the eccentric

42

latch portion

Claims (8)

1. A lock (10) for a bonnet of a motor vehicle which can be moved from an open position into a closed position, comprising a locking hook (14) which retains a striker (16) in the closed position of the bonnet and a catch (20) locking the locking hook (14) in the closed position, an eject lever (18) for moving the striker (16) out of the locking hook (14) being provided which is not blocked by the catch (20) in the closed position, characterised in that the catch (20) can actively move from a pre-locked position to a fully locked position in the closed position which locks the locking hook (14) and the catch (20) actively moves from the fully locked position to the pre-locked position as soon as a pedestrian impact situation is detected on the bonnet.
2. A lock according to Claim 1, the catch (20) being pivotably positioned on a bearing shaft (38) and the position of the bearing shaft (38) being adjustable by means of an eccentric (36).
3. A lock according to Claim 2, the eccentric (36) being designed to be self-locking in the fully locked position.
4. A lock according to any of Claims 1 to 3, the catch (20) being resiliently pushed in the direction of the locking hook (14).
5. Use of a lock (10) for a bonnet of a motor vehicle which can be moved from an open position into a closed position, comprising a locking hook (14) which retains a striker (16) in the closed position and a catch (20) locking the locking hook (14) in the closed position, an eject lever (18) for moving the striker (16) out of the locking hook (14) being provided, which is not blocked by the catch (20) in the closed position, characterised in that the catch (20) actively moves from a pre-locked position to a fully locked position in the closed position which locks the locking hook (14) and the catch (20) actively moves from the fully locked position to the pre-locked position as soon as a pedestrian impact situation is detected on the bonnet.
6. Use according to Claim 5, the catch (20) actively moving from the pre-locked position to the fully locked position after the bonnet has been manually closed.
7. Use according to Claim 5 or 6, the catch (20) actively moving from the fully locked position back into the pre-locked position as soon as the bonnet is manually opened.
8. Use according to Claim 7, a mechanical operating element being used to manually open the bonnet.

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