Motor-vehicle lock, in particular motor-vehicle bonnet lock
Patent Information
- Application Number
- PCT/DE2026/100358
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-03-27
- Filing Date
- 2026-03-20
- Publication Date
- 2026-10-01
Smart Images
Figure DE2026100358_01102026_PF_FP_ABST
Abstract
Description
[0001] Description
[0002] Motor vehicle lock, in particular motor vehicle hood lock
[0003] The invention relates to a motor vehicle lock, in particular a motor vehicle hood lock, with a locking mechanism consisting essentially of a rotary latch and a pawl, which interacts with a lock holder bracket on a hood, and with a storage element which moves the pawl into a storage position during an opening process of the hood and holds it there (in the storage position).
[0004] The term hood is to be understood broadly in the sense that it refers to any flap, door or the like that optionally closes an opening in a motor vehicle body.
[0005] For example, in an accident situation, motor vehicle hood locks can be moved into an upright or tilted position, as generally described in detail in DE 102005060750 A1. This tilts the hood in this position, creating a gap of a few centimeters between the hood and densely packed components inside the engine compartment. In this way, an impact or collision, for example by a pedestrian, can be dampened by a corresponding and permissible deformation of the hood. The known method employs a chain of at least two links, which can be disconnected from each other after the accident to interrupt the chain. Interrupting the chain releases the holding force and allows the hood to return to its closed position.
[0006] Quite independently of this, the generic prior art according to EP 3 513 020 B1, concerning a motor vehicle door lock, proceeds as follows: a storage element is provided which holds the locking pawl in a storage position lifted from the rotary latch during an unlocking process of the hood. In the storage position, the lock retainer bracket remains engaged in the rotary latch. Furthermore, during a first opening operation originating from the storage position, the lock retainer bracket moves the storage element into a release position that holds the locking pawl free. In addition, a two-arm lever is provided, which is designed with a stop arm resting against the lock retainer bracket and a bearing arm supporting the storage element, and functions as a switching lever.The storage element is mounted on the shift lever, and the storage element is designed as a storage lever with a blocking arm that interacts with the pawl and a control arm that interacts with the shift lever. This is intended to increase functional reliability while maintaining a simple design.
[0007] The state of the art has generally proven its worth, but still offers room for further improvements. For example, in the chain mechanism equipped with at least two links according to DE 10 2005 060 750 A1, malfunctions are possible due to its complexity and the required interaction. Regarding the second-mentioned and generic EP 3513020 B1, while an open position of the rotary latch and thus of the front hood is observed, an additional tilt position as a form of pedestrian protection cannot be realized and implemented. This is where the invention comes in.
[0008] The invention is based on the technical problem of further developing such a motor vehicle lock, and in particular a motor vehicle hood lock, in such a way that, taking into account a structurally simple and functionally reliable design, an extension position beyond the opening position of the hood can be assumed and used as effective pedestrian protection in the event of an impact.
[0009] As a solution to this technical problem, the invention proposes, in a generic motor vehicle lock and in particular a motor vehicle hood lock, that the rotary latch is equipped with a control contour for the storage element, so that after a first opening stroke of the pawl, the rotary latch assumes an open position with the storage element spaced apart, and the storage element only interacts with the pawl in the storage position after a second opening stroke of the pawl, and the pawl then holds the rotary latch in an extended position beyond the open position. Thus, the invention proceeds as follows: after a first opening stroke of the pawl, the rotary latch initially assumes the open position. In this open position, the hood equipped with the lock retainer bracket...The hood already maintains a certain distance from the body opening it covers, which typically contains components located beneath it, such as those used to power a vehicle. To move the hood into the even more exposed vented position, characterized by a significant gap between the hood and the opening and providing particularly effective pedestrian protection in the event of a frontal collision, a second opening stroke of the locking pawl is required. In fact, the locking pawl initially secures the rotary latch in its open position.
[0010] The pawl usually rests against an opening detent lug of the rotary latch. If, however, the rotary latch, and thus the locking mechanism consisting of the rotary latch and pawl, is in its closed position, the pawl interacts with a closing detent lug on the rotary latch. Since the opening detent lug is spaced apart from the closing detent lug in the opening direction of the rotary latch, it follows that the open position of the rotary latch already corresponds to a small distance from the vehicle body.
[0011] To engage the open position, the pawl is actuated again, resulting in a second opening stroke. This allows the pawl to then interact with an open-position locking lug on the rotary latch, which is located well beyond the open-position locking lug in the opening direction of the rotary latch. All lugs are located on the circumference of the rotary latch and can be distinguished from one another in the opening direction. As a result, the rotary latch assumes the exposed open position beyond the open position. Simultaneously, the pawl ensures that the rotary latch is held in this open position by assuming its locking position.In the locked position, the locking element interacts with the pawl, ensuring that the pawl is held in this position. This, in turn, holds the rotary latch in the extended position beyond the open position. The pawl engages the rotary latch's extension detent. This provides effective impact protection, particularly for pedestrians. The extended position of the rotary latch corresponds simultaneously to the extended position of the lock retainer bar on the hood or front hood, which remains engaged by the rotary latch.
[0012] This allows the hood, in this exposed, extended position beyond the open position, to undergo a large-scale and pronounced deformation in the described accident scenario, and especially in a pedestrian collision, thus providing optimal protection for the pedestrian. This is where the key advantages lie.
[0013] It is understood that the relevant position of the rotary latch, and thus the locking bar and consequently the hood or front hood, is typically only assumed in the event of an accident or frontal collision involving a pedestrian. Such an accident can be detected by a sensor, for example, and reported to a control unit. The control unit then initiates the two opening strokes to engage the locking pawl. In normal operation, without a detected accident, it is sufficient for the locking pawl to secure the rotary latch in its open position after the first opening stroke. This allows the operator to pivot a catch lever, usually provided separately, through a gap between the hood or front hood and the vehicle body, thus securing the hood or front hood in the open position.The front hood can be fully opened, for example for inspection purposes.
[0014] If, however, the described accident situation occurs and the sensor reports such an event to the control unit, the rotary latch, and thus the hood or front hood, is moved into the open position and held there. This means that, in order to open the hood or front hood from the open position, it is again necessary, for example, to manually pivot the previously mentioned and usually additionally provided catch lever to the side, which also secures the latch bracket. As a rule, the vehicle lock according to the invention is also equipped with an opening lever for the hood's latch bracket. Typically, the opening lever and the locking pawl are mounted axially aligned with each other, so that a single bearing pin can be used for their common mounting. Furthermore, the opening lever is usually also equipped with a spring.The spring acts on the opening lever to actuate the lock catch. This means the opening lever is generally in contact with the base of the lock catch. Because the spring acts on the opening lever in the direction of opening the lock catch, the lock catch is constantly acted upon by the opening lever in the direction of opening the hood or front hood equipped with the lock catch. Without the rotating catch that engages the lock catch, the opening lever would cause the front hood to be forced open.
[0015] Since the lock retainer bracket is guided and held in an entry opening of the rotary latch, the lock retainer bracket, and thus the hood or front hood, is only released from the rotary latch when the lock retainer bracket leaves the entry opening and is able to do so. This is usually only possible if the aforementioned catch hook, which additionally secures the lock retainer bracket in the entry opening of the rotary latch, has been swung out of the way beforehand.
[0016] It has proven effective to use a coil spring to actuate the opening lever of the latch bracket. This coil spring has a coiled section and at least one spring arm extending from this coiled section largely tangentially. The spring can also be a leaf-shaped coil spring, which is particularly useful when hoods or front hoods of considerable weight are to be opened using the opening lever. Such a leaf-shaped coil spring is usually designed so that its coiled end engages in a slot in the common bearing pin for the pawl and the opening lever. That is, the bearing pin is equipped with the slot into which the coiled end of the leaf-shaped coil spring engages and is secured.The bearing bolt is one that defines the common axis of the pawl and the setting lever.
[0017] In most cases, a release lever for the pawl is also provided. This release lever can be actuated electrically or by an electric motor and / or manually, for example, via a Bowden cable. Furthermore, the release lever is typically mounted concurrently with the pawl and the setting lever. For this purpose, the invention utilizes the previously mentioned common bearing pin for the pawl and the setting lever, which is also used to mount the release lever and, as an additional function, secures the coil-section end of the leaf spring or, more generally, the spring.
[0018] As explained in the introduction, the rotary latch is equipped with a control contour for the storage element. Specifically, this control contour ensures that the storage element is held in a spaced position until it reaches its storage position. This occurs only after the second opening stroke of the pawl. In this storage position, the previously spaced storage element can then interact with the pawl and lock it in place. The pawl, in turn, ensures that the rotary latch is locked in its corresponding open position beyond the fully open position.
[0019] To achieve this in detail, the control contour on the rotary latch for the storage element has a front guide lug and a rear locking lug. The combined action of the front guide lug and the rear locking lug holds the storage element in its spaced position until it reaches and assumes the storage position.
[0020] The rotary latch now features not only the guide lug and the closing locking lug on its circumference, specifically on its locking arm, but is also usually equipped on the reverse side with the opening locking lug and the release locking lug in that order. This means that, following the front guide lug on the rotary latch or the locking arm of the rotary latch, the closing locking lug, then the opening locking lug, and finally the release locking lug follow in that order when the rotary latch is opened.
[0021] The locking detent lug is not only a component of the control contour on the rotary latch, but also interacts with the pawl in the closed position of the locking mechanism consisting of the rotary latch and pawl. In contrast, the opening detent lug on the rotary latch interacts with the pawl when the rotary latch has reached its open position. This occurs after the first opening stroke of the pawl, because after this initial stroke, the pawl first disengages from the locking detent lug and then, at the end of the first stroke, engages the opening detent lug on the rotary latch. Since the opening detent lug on the rotary latch is spaced apart from the latch in the opening direction, it is explained that the opening position corresponds to a distance between the hood and the vehicle body. During this process, the rotary latch is actuated in the opening direction, but the lock retainer bracket remains in the entry jaw.The opening movement of the rotary latch also moves the setting lever in the opening direction and thus also the hood or front hood connected to the lock holder bracket.
[0022] In this open position, and also before, the control contour on the rotary latch, consisting of the front guide lug and the locking lug, ensures that the storage element, which is generally arranged predominantly tangentially to the locking arm of the rotary latch and designed as a storage lever, is held in the spaced position and cannot interact with the pawl. Only when the pawl has been subjected to the second opening stroke and consequently pivoted away from the opening locking lug, can the storage element or the storage lever interact with the pawl and hold it in its storage position after the second opening stroke. This is because, after this second opening stroke, the pawl returns to the rotary latch with spring assistance.
[0023] In this locked position, the locking lever or locking element not only ensures that the pawl is fixed and held in place, but also corresponds to the position assumed by the rotary latch during the second opening stroke of the pawl. In fact, the rotary latch is either spring-loaded in the opening direction itself, and / or, more generally, the actuating lever, which acts on the spring-loaded latch retainer, ensures that the rotary latch is spring-loaded in the opening direction. This is because the latch retainer remains in the entry jaw of the rotary latch, so that the spring-loaded actuating lever not only pre-tensions the actuating lever in the opening direction of the hood, but also ensures that the rotary latch is pivoted in the opening direction under spring load, unless the pawl prevents it.
[0024] In any case, the extended position of the rotary latch after the second opening stroke of the pawl corresponds to the fact that not only does the storage element or storage lever interact with and hold the pawl, but the pawl also engages in this extended position with the extension detent of the rotary latch or on the detent arm of the rotary latch. This secures the rotary latch in this extended position in conjunction with the storage element or storage lever. As a result, the extended position can be used according to the invention to ensure optimal damping of movement in the event of a pedestrian accident. This is because, in this extended position, the hood or front hood is significantly spaced away from the opening it closes and thus from the vehicle body, allowing for considerable deformation of the hood or front hood in the extended position to protect the pedestrian.
[0025] The open position of the rotary latch, and thus of the locking mechanism and the interacting hood, as well as the tilted position, can be easily distinguished and moved independently. This requires only that the pawl completes a single opening stroke to achieve the open position, whereas the tilted position requires a double stroke. Both the single and double pawl strokes can be actuated electrically or manually. Combinations of these are also possible.
[0026] All of this is achieved through a particularly functional and simple design, while simultaneously achieving a significantly more open position away from the vehicle body. In this open position, the locking pawl is not only held by the storage element, but the rotary latch is also held in the opening direction far beyond the opening latch by the interaction of the locking pawl with the open position locking lug. These are the key advantages.
[0027] The invention will be explained in more detail with reference to a drawing that merely illustrates an exemplary embodiment; the drawing shows:
[0028] Figure 1 shows the motor vehicle lock according to the invention in a rear view in a first variant with a spring with a round cross-section for acting on the release lever,
[0029] Figure 2 shows the object according to Figure 1 in a different embodiment with a spring designed as a leaf spiral spring with a consequently rectangular cross-section,
[0030] Figure 3 shows the essential components of the motor vehicle lock according to Figures 1 and 2 in an exploded view.
[0031] Figure 4 shows a front view of the motor vehicle lock according to Figures 1 and 2, schematically in the closed state of the depicted locking mechanism.
[0032] Figure 5 shows an opening process of the lock following the closed state according to Figure 4 during a first opening stroke of the locking pawl,
[0033] Figure 6 shows the motor vehicle lock according to Figure 4 at the end of the first opening stroke,
[0034] Figure 7 shows the motor vehicle lock starting from the functional position in Figure 6 during a second opening stroke and
[0035] Figure 8 shows the motor vehicle lock according to Figure 7 at the end of the second opening stroke with the storage element retracted and the locking pawl consequently in the storage position. The figures depict a motor vehicle lock, which in this exemplary embodiment is a motor vehicle hood lock. It has a locking mechanism 1, 2 consisting essentially of a rotary latch 1 and a locking pawl 2. The locking mechanism 1, 2 interacts with a lock retainer bracket 3 on a hood 4, which is only indicated in Figure 4 and is designed as the front hood of a motor vehicle (not shown).
[0036] Furthermore, the basic structure includes a storage element 5, which moves the locking pawl 2 into a storage position during the opening process of the hood 4, as shown in Figure 8. It can be seen that the storage element 5 is a storage lever 5, which, according to the exemplary embodiment, is designed as a single-arm lever and is pivotably mounted about an axis 6. The storage element 5, or storage lever 5, is biased towards the rotary latch 1 by means of a spring (not shown in detail). Moreover, the storage lever 5, designed as a single-arm lever, moves predominantly tangentially compared to the opening movement of the rotary latch 1, which can be observed during the transition from the closed position of the locking mechanism 1, 2 shown in Figure 4 to the open position as shown in Figure 6, and finally to the open position as shown in Figure 8.During this opening process of the rotary latch 1, the rotary latch 1 completes a clockwise movement about its axis 7, as indicated in Figure 4. Like the axis 6 of the pivot lever 5, the axis 7 of the rotary latch 1 is also defined by a bearing bolt that is anchored in a lock case 8.
[0037] According to the invention, the rotary latch 1 is first equipped with a control contour 9, 10 for the storage element 5. In the exemplary embodiment, the control contour 9, 10 comprises a front guide lug 9 and a rear locking lug 10. The control contour 9, 10 is formed on a locking leg 1a of the rotary latch 1, which, in conjunction with a retaining leg 1b, defines an entry opening E into which the lock retainer bracket 3, connected to the cover 4, enters and is guided and held. In the opening direction of the rotary latch 1, clockwise with respect to its axis 7, not only the front guide lug 9 and the adjoining rear locking lug 10 are provided, which together define the control contour 9, 10.Rather, it can be seen, particularly in the illustrations according to Figures 4 to 8, that beyond the closing latch 10, an opening latch 11 and then, further along the opening direction in question, an opening latch 12 are provided in this order on the outer circumference of the rotary latch 1 or on its latch leg 1a. The function of the individual latches 10, 11, 12 on the circumference or outer circumference of the rotary latch 1 will subsequently be explained in more detail with reference to Figures 4 to 8.
[0038] The basic structure of the vehicle lock also includes a setting lever 13, which is best understood in the rear view shown in Figures 1 and 2. In addition, a release lever 14 is also incorporated. The setting lever 13 and the release lever 14 are mounted axially to the pawl 2, utilizing a common bearing pin 15 as their shared axis. This bearing pin 15 is further illustrated in the exploded view shown in Figure 3 and, within the scope of the present invention, serves an additional function: it acts as a fixed point or anchor for a leaf-shaped coil spring 16, or more generally, the spring 16, as shown in the embodiment of Figure 2. For this purpose, the bearing pin 15 is equipped with a slot 15a along its diameter, into which the leaf-shaped coil spring 16 engages with its coil-side end, as shown in Figure 2.To secure this coil section-side end of the leaf spiral spring 16 in the slot 15a of the bearing bolt 15, a reinforcing plate 17, which can be seen particularly in the exploded view according to Figure 3, is additionally provided.
[0039] The reinforcing plate 17 not only secures the coil-section end of the leaf-spiral spring 16, but also ensures that a torque transmitted by the leaf-spiral spring 16 or general spring 16 can be introduced into the lock case 8. For this purpose, the reinforcing element 17 has a web 17a that engages in the slot 15a of the bearing mandrel or bearing bolt 15 and lateral wings 17b, which support the reinforcing element 17 against the lock case 8 and ensure the described force transmission into the lock case 8.
[0040] The opening lever 13 is now actuated by the spring 16 such that the spring 16 pivots the lock retainer 3, which rests against the opening lever 13, and thus the cover 4, in the opening direction, as indicated by the corresponding arrows in Figures 1 and 2. In the variant shown in Figure 1, the spring 16 has a round wire cross-section, whereas the leaf-coil spring 16 in Figure 2 has a rectangular cross-section. In both cases, the spring 16 is equipped with a coiled section 16a, which is arranged predominantly concentrically to the axis 15 of the pawl 2 and also has a spring arm 16b extending mostly tangentially from the coiled section 16a. The spring arm 16b rests against a contact plate 13a of the opening lever 13 on its underside, against which, in turn, and against an opposite surface, the base of the lock retainer 3 rests.
[0041] The previously mentioned release lever 14, which is mounted on the same axis as the pawl 2, can now be actuated electrically as well as manually, as shown in Figure 4. As already explained, the release lever 14 is mounted on the same axis as the pawl 2; the pawl 2, the release lever 14, and the setting lever 13 all use the common bearing pin 15 to define their respective bearing axes.
[0042] A comparative analysis of Figures 1, 2, and 4 reveals that the release lever 14 is actuated by an electric motor 18. The electric motor 18, in turn, drives a transmission lever 19. In the illustration of Figure 2, this transmission lever 19 is actuated in such a way that it rotates counterclockwise around its axis. This counterclockwise movement causes the release lever 14 to pivot about the axis 15, specifically in the counterclockwise direction indicated in Figure 4. An identical pivoting movement of the release lever 14 in a counterclockwise direction around its axis 15 can then be achieved if the release lever 14 is alternatively actuated manually at its end opposite the electric motor 18, for example with a Bowden cable 20 indicated there in the sense of a pulling movement.
[0043] As a result of the manually and / or electrically initiated pivoting movement of the release lever 14 about its axis 15 in the counterclockwise direction shown in Figure 4, the pawl 2 completes an opening stroke. This is because the pawl 2 is rotatably mounted coaxially with the release lever 14 about the bearing pin 15. Furthermore, the release lever 14 engages with a projection 14a in a recess 2a of the pawl 2, and thus the described counterclockwise rotation of the release lever 14 results in an opening stroke of the pawl 2. This corresponds to the pawl 2 being pivoted coaxially and together with the release lever 14 about the axis 15 in a counterclockwise direction, thereby disengaging from the rotary latch 1. Because in the closed state of the locking mechanism 1, 2 shown in Figure 4, the pawl 2 is engaged with the rotary latch 1.
[0044] According to the invention, the design is such that the rotary latch 1 is equipped with the previously described control contour 9, 10 for the storage element 5. As a result, after a first opening stroke of the pawl 2, the rotary latch 1 assumes an open position, or the open position, as shown in Figure 6. In this open position of the rotary latch 1, the pawl 2 interacts with the opening detent 11 on the rotary latch 1. If, starting from this open position, the pawl 2 is subjected to a further opening stroke as shown in Figure 6, this corresponds to the previously described counterclockwise movement of the pawl 2 about its axis 15. This moves the pawl 2 away from the opening detent 11 and allows the rotary latch 1 to pivot further in the opening direction, i.e., clockwise about its axis 7.This is ensured by the setting lever 13, which, via the lock holder bracket 3 located in the inlet opening E, acts on the rotary latch 1 in this direction in a clockwise direction around its axis 7.
[0045] After this second opening stroke, as shown at the end in Figure 8, the storage element 5, which was previously held spaced apart by the rotary latch 1, can interact with the pawl 2 and locks the pawl 2 in the storage position shown in Figure 8. In this storage position, the pawl 2 interacts again with the rotary latch 1 after its second opening stroke, because the pawl 2 has then engaged in the release detent 12. This corresponds to the release position of the rotary latch 1, and thus also of the cover 4, beyond the open position as shown in Figure 6. The individual steps and the sequence of functions are explained below with reference to Figures 4 to 8. In Figure 4, the locking mechanism 1, 2 is in its closed position. This corresponds to the fact that the pawl 2 interacts with the closing detent 10. The cover 4 is closed. Furthermore, the leading nose 9 orThe control contour 9, 10 on the rotary latch 1 ensures that the storage element 5 is held at a distance from the rotary latch 1 as well as from the locking pawl 2.
[0046] Starting from the closed position shown in Figure 4, a first opening stroke of the pawl 2 causes it to pivot counterclockwise about its axis 15. This occurs because the release lever 14 is pivoted manually and / or electrically counterclockwise about the aforementioned axis 15, thereby engaging the pawl 2, as can be seen in the transition from Figure 4 to Figure 5. This moves the pawl 2 away from the locking lug 10. The storage element, or storage lever 5, is held at a distance from the rotary latch 1 and the pawl 2 by means of the control contour 9, 10, i.e., by the combined action of the guide lug 9 and the locking lug 10.
[0047] Figure 6 shows the end of the first opening stroke of the locking pawl 2. At the end of this first stroke, the release lever 14 is spring-assisted back into position. The same applies to the locking pawl 2, which, during this return movement, interacts with the opening detent 11 in the open position of the rotary latch 1 shown in Figure 6. In this open position, as shown in Figure 6, the hood 4 can be opened, for example, by an operator. This open position corresponds to a gap remaining between the hood 4 and the vehicle body, through which an operator pivots a catch hook (not shown) that additionally secures the lock retainer 3, thereby opening the locking mechanism 1, 2 and allowing the hood 4 to be swung open.
[0048] When the pawl 2, starting from the open position in Figure 6, completes a second opening stroke, it reaches the open position in Figure 8 at the end of this second stroke. During the transition from Figure 6 to Figure 7, the pawl 2 is pivoted counterclockwise around its axis 5 by means of the release lever 14. This releases the pawl 2 from the opening detent 11. Furthermore, it can be seen that, during the subsequent transition from Figure 7 to Figure 8, the pawl 2, with an additional opposing detent 2c (provided in addition to the detent 2b), interacts with the open detent 12 on the rotary latch 1.
[0049] That is, both in the closed position of the locking mechanism 1, 2 as shown in Figure 4 and in the open position as shown in Figure 6, the pawl 2 interacts with the rotary latch 1 via its first detent lug or first detent hook 2b. If, on the other hand, the rotary latch 1 assumes its open position as shown in Figure 8, the second detent lug or second detent hook 2c on the pawl 2 interacts with the rotary latch 1, specifically with the open detent lug 12. The two detent lugs or detent hooks 2b and 2c on the pawl 2 are diametrically opposed to each other, so that the pawl 2 has a U-shaped cross-section overall.
[0050] At the end of the second opening stroke of the pawl 2, the release lever 14 has again assumed its initial position as shown in Figure 8, and the pawl 2 has again moved towards the rotary latch 1, as the second locking hook 2c on the pawl 2 interacts with the release locking lug 12 on the rotary latch 1. The exposed release position shown in Figure 8 can be achieved by spacing the two locking hooks 2b, 2c apart.
[0051] In this extended position, as shown in Figure 8, the lock retainer bracket 3 remains engaged in the inlet opening E and is acted upon by the opening lever 13 in the direction of an opening in the hood 4. This extended position corresponds to a significant distance between the hood 4 and the surrounding vehicle body, so that the hood 4 can deform extensively in the event of a pedestrian impact, because the components located in the engine compartment enclosed by the hood 4 are a considerable distance from the hood 4 in the extended position. This distance may be several centimeters up to 10 cm.It is understood that the hood 4 can be opened again from the extended position in a manner comparable to opening from the open position, namely by an operator pivoting the additionally provided and not shown catch hook for securing the lock holder bracket 3 with his hand, thereby releasing the lock holder bracket 3 and allowing the locking mechanism 1, 2 and thus the hood 4 to be opened.
[0052] The hood can be moved into the open position shown in Figure 8 manually by applying twice the opening stroke to the release lever 14. Alternatively, this can also be done electrically using the electric motor 18. This usually occurs following a signal from a collision sensor, which is detected by a control unit (not shown). As a result, the control unit ensures that the electric motor 18 is energized and applies twice the opening stroke to the release lever 14 and thus to the locking pawl 2, so that at the end of this process the hood 4 or the rotary latch 1 assumes the open position shown in Figure 8. The hood can now provide the desired damping of movement in the event of a collision with a pedestrian.
[0053] 1 rotary trap
[0054] 2 locking pawls
[0055] 2a Exclusion
[0056] 2b Locking hook
[0057] 2c Latch hook
[0058] 3 lock holder brackets / support levers
[0059] 4 Hood
[0060] 5 Storage element / Swivel lever
[0061] 6-axis
[0062] 7-axis
[0063] 8 lock boxes
[0064] 9 front guide nose
[0065] 10 rear guide nose
[0066] 11 Opening latch
[0067] 12 Exit locking tab
[0068] 13 Setting levers
[0069] 13a Mounting plate
[0070] 14 Release levers
[0071] 15 Axle / Bearing bolt
[0072] 15a slot
[0073] 16 Spring / Leaf spiral spring
[0074] 17 Reinforcement plate
[0075] 17a intersecting bridge
[0076] 17b side wing
[0077] 18 Electric motor
[0078] 19 transmission levers
[0079] 20 Bowden cable
[0080] E Inlet mouth
Claims
Patent claims 1. Motor vehicle lock, in particular motor vehicle hood lock, with a locking mechanism (1, 2) consisting essentially of a rotary latch (1) and a locking pawl (2), which interacts with a lock retainer bracket (3) on a hood (4), and with a storage element (5) which moves the locking pawl (2) into a storage position during an opening process of the hood (4) and holds it therein, characterized by the fact that the rotary latch (1) is equipped with a control contour (9, 10) for the storage element (5), such that after a first opening stroke of the pawl (2) the rotary latch (1) assumes an open position with a spaced storage element (5) and the storage element (5) only interacts with the pawl (2) in the storage position after a second opening stroke of the pawl (2) and the pawl (2) then holds the rotary latch (1) in an open position beyond the open position.
2. Motor vehicle lock according to claim 1, characterized in that an additional lifting lever (13) is provided for the lock holder bracket (3) of the hood (4).
3. Motor vehicle lock according to claim 2, characterized in that the setting lever (13) and the locking pawl (2) are mounted on the same axis.
4. Motor vehicle lock according to claim 2 or 3, characterized in that the setting lever (13) is equipped with a spring (16).
5. Motor vehicle lock according to claim 4, characterized in that the spring (16) acts on the actuating lever (13) to actuate the opening action of the lock holder bracket (3).
6. Motor vehicle lock according to one of claims 4 or 5, characterized in that the spring (16) is designed as a coil spring with a coil section (16a) and at least one spring arm (16b) extending from the coil section (16a) largely tangentially.
7. Motor vehicle lock according to one of claims 4 to 6, characterized in that the spring (16) is designed as a leaf coil spring (16) and engages with its coil section-side end in a slot (15a) of a common bearing bolt (15) for the locking pawl (2) and the release lever (13).
8. Motor vehicle lock according to one of claims 1 to 7, characterized in that a release lever (14) for the locking pawl (2) is provided, which can be actuated electromechanically and / or manually via, for example, a Bowden cable (20) and is mounted axially aligned with the locking pawl (2) and the setting lever (13).
9. Motor vehicle lock according to one of claims 1 to 8, characterized in that the control contour (9, 10) on the rotary latch (1) for the storage element (5) has a front guide lug (9) and a rear locking latch lug (10).
10. Motor vehicle lock according to claim 9, characterized in that the rotary latch (1 ) is equipped circumferentially in the opening direction with an opening latch (11 ) and an opening latch (12) in this order in addition to the locking latch lug (10).