DE102023203715A1 - safety system and motor vehicle - Google Patents

Abstract

Safety system (12) for a locking element, in particular a front flap (2), which can be moved on a body of a motor vehicle between a closed position and an open position, with at least one locking device (4) by means of which the locking element can be locked on the body in the closed position, with at least one setting device (7) for setting the locking element in a protective position remote from the body, wherein the setting device (7) has at least one controllable actuator (9), and wherein the setting device (7) is connected to the locking device (4) by a Bowden cable device (10) in such a way that when the locking element is set up, the locking device (4) is actuated to release the locking element. It is provided that the Bowden cable device (10) has two Bowden cables (11, 12) connected in series by a coupling device (13), each having a core (11'', 12''), wherein the coupling device (13) has a freewheel device (16) which, depending on a predetermined pulling path of one of the cores (11'', 12'') relative to a housing (14) of the coupling device (13), causes an interruption in the pulling force between the cores (11'', 12'').

Description

The invention relates to a security system for a locking element, in particular a front flap, which can be moved between a closed position and an open position on a body of a motor vehicle, with at least one locking device by means of which the locking element can be locked in the closed position on the body, with a setting device for setting the locking element in a protective position remote from the body, wherein the setting device has at least one controllable actuator, and wherein the setting device is connected to the locking device by a Bowden cable device in such a way that when the locking element is set up, the locking device is actuated to release the locking element.

Furthermore, the invention relates to a motor vehicle with such a safety system.

Safety systems of the type mentioned at the beginning are known from the prior art. For example, a safety system with the features of the preamble of claim 1 is described in a patent application by the present applicant that has not yet been published. In order to increase the safety of pedestrians and cyclists, it is known to raise or raise the front flap of a motor vehicle from the body in the event of an impending collision. By raising the front flap in its entirety to the protective position, the distance to the parts underneath is increased and the risk of injury to pedestrians or cyclists is thus reduced.

Because the front flap is usually locked to the body at its front end by the locking device to prevent unauthorized opening of the front flap, this locking device must be released or opened when the front flap is lifted so that the front flap can be lifted as a whole. To this end, the above-mentioned publication suggests connecting the front flap to the locking device using a Bowden cable device, so that when the front flap is raised, the locking device is automatically released or opened by means of the Bowden cable device, thus releasing the front flap at its front end. The greater the travel of the front flap or locking element, the lower the risk of injury. However, because different locking devices require different actuation paths to open them, the locking device can be overloaded or unintentionally loaded at this point.

The present invention is based on the object of improving the safety system in such a way that, regardless of the installation path, damage to the front flap lock by actuation by means of the Bowden cable is avoided.

The object underlying the invention is achieved by a safety system with the features of claim 1. This has the above-mentioned advantage that an overload of the locking device is avoided when the locking element is set up. According to the invention, this is achieved in that the Bowden cable device has two Bowden cables connected in series by a coupling device, each with a core, wherein the coupling device has a freewheel device which, depending on a pulling path of a first of the cores relative to a housing of the coupling device, causes an interruption in the tensile force between the cores. The Bowden cable device is thus designed in several parts. Two Bowden cables, each of which has a sleeve and a core, are connected to one another by the coupling device. The first of the cores can be moved relative to the housing of the coupling device by exerting a tensile force on it, for example when the core is fastened with one of its ends to the front flap or a hinge associated with the front flap and with its other end to the coupling device. The freewheel device ensures that as soon as a predetermined pulling path of the first core is reached or exceeded, the pulling force that would otherwise be transferred from one core to the other by the coupling device is interrupted, thus preventing the other core from moving further. The interruption of the pulling force depending on the pulling path ensures that the locking device is not overloaded. The coupling device can be adapted to different applications so that the pulling path and the actuation path of the locking device can be coordinated with one another. The safety system can therefore also be retrofitted to motor vehicles, for example.

According to a preferred development of the invention, the coupling device has a driver which is slidably mounted in the housing and to which the cores are each attached at one end, wherein the freewheel device is designed to release the attachment of the first cores from the driver depending on a predetermined pulling path of the first core. The interruption of the traction is thus advantageously achieved by releasing one of the cores from the common driver. The fact that both cores are connected to the driver enables advantageous power transmission, in particular traction transmission. from one core to the other core in the housing of the coupling device until the specified pulling path is reached. The driver also keeps the cores guided in the housing so that the freewheel device can work optimally.

The driver particularly preferably has a receptacle on one side surface in which a retaining element, which is attached to the end of the first core, is inserted in such a way that it interacts with the driver in a form-fitting manner in the sliding direction of the driver. This ensures that this core can be easily mounted on the driver. The first core only has to be inserted with the retaining element into the receptacle laterally in the sliding direction of the driver. If a tensile force is then exerted on this first core, the retaining element interacts with the side wall of the driver in a form-fitting manner in the sliding direction, whereby the driver and thus also the other or second core are carried along.

The driver preferably has a recess through which the core is guided out of the receptacle in the sliding direction of the driver. The recess ensures that the core can extend in the direction of the tensile force, while the retaining element interacts with the driver in a form-fitting manner in the direction of the tensile force. This ensures optimal power transmission.

Furthermore, it is preferably provided that the freewheel device causes or enables a release of the retaining element from the receptacle when a predetermined sliding position of the driver is reached or when the predetermined pulling path of the first core in the housing is reached. By moving the retaining element out of the receptacle, the positive connection between the retaining element and the driver in the sliding direction is canceled, so that the advantageous development ensures a simple and safe interruption of the pulling force.

The freewheel device particularly preferably has a cover which is assigned to the side surface of the driver and serves as a guide for the driver, the cover having a first section in which the cover locks the retaining element in the receptacle, and a second section adjoining this in the sliding direction, in which the retaining element can exit the receptacle. The retaining element is thus held back in the receptacle by the cover in the starting position of the driver, or in the non-actuated state. Only when the slider has moved sufficiently far so that the receptacle is in the second section of the cover is it possible to release the retaining element from the receptacle. By determining the longitudinal extent of the first section and the second section of the cover depending on the permissible actuation path of the locking device, a precise interruption of force depending on the pulling path of the core is thus guaranteed. Thus, by designing the cover, the security system can also be adapted to different boundary conditions, in particular different paths and/or locking devices, using simple and cost-effective means.

The cover preferably has a recess in the second section for receiving the retaining element. The recess ensures that the retaining element is still guided in or on the coupling device even when it exits the driver and thus even when the traction force has been interrupted, so that an unintentional release of the core from the coupling device is prevented or can be prevented altogether.

Furthermore, it is preferably provided that the receptacle has a lifting slope in the sliding direction, which is designed to push the retaining element out of the recess when a tensile force acts on the retaining element through the core. The lifting slope initially pushes the retaining element only against the first section of the cover, so that the cover prevents it from escaping from the receptacle. However, as soon as the receptacle is in the area of the second section, in particular in the area of the recess in the cover, with sufficient tensile force the retaining element is pushed along the lever slope or surface into the recess or into the second section of the cover and thus out of the receptacle and the transmission of tensile force is interrupted.

Furthermore, it is preferably provided that the driver is designed as a one-part or multi-part slide that can be moved in the housing, with the sleeves of the Bowden cables being attached to the housing and the cores of the Bowden cables being attached to the slide or to a slide part of the multi-part slide. In particular, the slide is assigned a spring element by which the slide is urged into the starting position.

According to a further embodiment of the invention, it is preferably provided that the carriage has a first carriage part and a second carriage part, wherein the first core is arranged on the first carriage part and the second carriage part the second core is attached, and wherein the second slide part is displaceable independently of the first slide part, and wherein the first slide part has a driving section through which the second slide part is displaced together with the first slide part. This ensures that the first Bowden cable can be actuated or the core can be displaced when the lock device is actuated, in particular independently of the positioning of the locking element, so that the coupling device does not hinder or make it difficult to intentionally unlock the lock device.

The motor vehicle according to the invention with the features of claim 11 is characterized by the inventive design of the safety system. This results in the advantages already mentioned.

• 1 ein Sicherheitssystem für ein Kraftfahrzeug in einer vereinfachten perspektivischen Darstellung,
• 2A und 2B eine vorteilhafte Koppeleinrichtung des Sicherheitssystems mit und ohne Abdeckung,
• 3A und B das Sicherheitssystem in zwei unterschiedlichen Betriebszuständen, und
• 4 ein weiteres Ausführungsbeispiel der Koppeleinrichtung.

Further advantages and preferred features and combinations of features emerge in particular from what has been described above and from the claims. The invention will be explained in more detail below with reference to the drawing.

• 1 a safety system for a motor vehicle in a simplified perspective view,
• 2A and 2B an advantageous coupling device of the security system with and without cover,
• 3A and B the safety system in two different operating states, and
• 4 another embodiment of the coupling device.

1 shows a perspective view of a safety system 1 for a motor vehicle not shown in detail here. The motor vehicle has a front flap 2, which is shown here diagonally from below. The front flap 2, which is arranged in the front area of the motor vehicle, can be moved from an open position to a closed position and vice versa, as shown by a double arrow 3 in 1 displayed. The front end of the front flap 2 is also assigned a locking device 4 of the security system 1, by means of which the front flap 2 can be locked in the closed position on the body of the motor vehicle. The locking device 4 prevents unauthorized opening by unauthorized persons. In order to enable authorized persons to open the front flap 2, the locking device 4 can be actuated so that the lock is released and the front flap 2 can be swung open into the open position. To trigger the locking device 4, for example, an actuating lever 5 is provided, which is arranged in the vehicle interior, for example in the footwell of the driver's seat, and is connected to the locking device 4 by a Bowden cable 6.

The front flap 2 is also assigned two setting devices 7 of the security system 1. The respective setting device 7 has a setting hinge 8 at the end of the front flap 2 facing away from the locking device 4, as well as a controllable actuator 9. The setting hinges 8 can be actuated by means of the actuator 9 in such a way that the front flap 2 is raised at its end facing away from the locking device 4.

The security system 1 also includes one or more positioning devices at the front end of the front flap 2, so that the front flap 2 as a whole can be raised into a protective position. In order for the front flap 2 to also be raised at the front, the locking device 4 must be released or opened. For this purpose, it is provided here that at least one of the positioning devices 7 is connected to the locking device 4 by a Bowden cable device 10 of the security system 1.

The Bowden cable device 10 has a first Bowden cable 11 and a second Bowden cable 12, which are connected to one another by a coupling device 13.

2A and 2B show the coupling device 10 in different representations. 2A the coupling device 10 in a perspective top view and 2B shows the coupling device 10 in a perspective sectional view.

The coupling device 10 has a housing 14 in which a driver 15 is mounted so as to be longitudinally displaceable. The first Bowden cable 11 has a first sleeve 11' and a core 11". The sleeve 11' is fastened to the housing 14. At its other end, the sleeve 11' is fastened to the setting device 7. A core 11" guided through the sleeve 11' is also fastened at one end to a part of the setting device 7 and at the other end to the driver 15 which can be displaced in the housing 14. The driver 15 is designed in particular as a one-part or multi-part slide.
The second Bowden cable 12 has a sleeve 12', which is also fastened in the housing 14, as well as a core 12", which is fastened to the driver 15. If the setting device 7 is actuated and the front flap is set up, the core 11" is subjected to a tensile force by the setting up, which is transferred to the driver 15. Since the driver 15 is also connected to the core 12", the Bowden cable 12 is also actuated. The Bowden cable 12 is in turn held at its other end on the locking device 4, with the core 12" being connected to an actuation direction of the locking device 4. Thus, when the setting device 7 is actuated, the tensile force is transferred from the core 11" to the core 12" and thus to the locking device 4 in such a way that the locking device 4 is unlocked or opened.

The coupling device 13 further comprises a freewheel device 16, which ensures that when the first core 11" has exceeded a predetermined pulling path, i.e. the driver 15 has also been displaced the predetermined movement path, the transmission of pulling force from the core 11" to the core 12" is interrupted.

For this purpose, the freewheel device 16 has a receptacle 17 formed in the driver 15. The receptacle 17 is formed in a side surface 19 of the driver 15, which is aligned transversely to the sliding device of the driver 15 in the housing 14. The core 11" has a retaining element 18, here in the form of a ball, at its end facing the driver 15, which is firmly connected to the end of the core 11". The receptacle 17 is designed to receive the retaining element 18. The receptacle 17 therefore has a depth, length and width that allows the retaining element 18 to be completely received.

2B shows a perspective longitudinal sectional view in the area of the receptacle 17 in a cutting plane which is parallel to the sliding direction.

The driver 15 also has a recess 20 which leads into the receptacle 17 in the sliding direction and serves to guide the core 11" into the receptacle 17. As a result, the core 11" is advantageously guided out of the receptacle 17 in the pulling direction. The recess 20 is designed to be so narrow that only the core 11" can be guided out of the receptacle in the pulling direction or sliding direction, while the retaining element 18 continues to interact with the driver 15 in a form-fitting manner in the pulling direction. The side wall of the receptacle 17 assigned to the retaining element 18 and lying in the pulling direction is designed as a lifting slope 21 which forms a side wall of the receptacle 17 which is aligned at an angle to the pulling direction.

The coupling device 13 also has a cover 23 that covers the housing 14. The cover 23 is arranged in particular above the recess 17 or opposite the side surface 19. The cover 23 has a first section in which the cover 23 is designed to be completely closed. The first section 23 is followed in the sliding direction of the driver 15 by a second section in which the cover 23 has a recess 24. The recess 24 extends in the sliding direction, namely at the level of the recess 17, so that when the driver 15 is moved from the starting position according to 2A and 3A is moved, the recess 17 comes opposite the recess 24, as in 2B and 3B shown..

If the setting device 7 is now triggered and the core 11" is pulled, this causes the driver 15 to move. Because the retaining element 18 is held between the cover 23 on the one hand and the driver 15 on the other, a forced guide is created which displaces or moves the driver 15. However, as soon as the driver 15 reaches the recess 24 with the recess 17, the lifting slope 21 causes the retaining element 18 to escape from the recess 17 in the direction of the recess 24. The recess 24 is designed to be so deep that it can completely accommodate the retaining element 18. As soon as the driver 15 has reached the recess 24, the retaining element 18 is displaced into the recess 24, whereby the positive connection with the driver 15 is released and the core 11" can be pulled further without the driver 15. At this moment, the traction connection between souls 11" and 12" is interrupted. This means that a further pull of soul 11" does not cause a further pull of soul 12".

The position of the recess 24 is therefore selected such that the driver 15 is driven along until the locking device 4 is safely triggered or opened. Only then does the retaining element 18 jump into the recess 24 to interrupt the tensile force. The freewheel device 16 thus ensures that, despite a relatively large movement path of the setting device 7 compared to the actuation path of the locking device 4, an overload of the locking device 4 is prevented.

3A and 3B show the different operating states in an enlarged sectional view, whereby in 3B the retaining element 18 is held in a form-fitting manner between the cover 23 and the driver 15. 3B shows the freewheel state in which the retaining element 18 has penetrated into the recess 24 and can thus be moved further without being released from the driver 15.

4 shows a further embodiment of the coupling device 13, wherein already known elements are provided with the same reference numerals, so that in this respect reference is made to the above description. In the following, only the differences will be discussed.

According to the present embodiments, the carriage is formed in two parts with a first carriage part 25, to which the first core 11" is attached, and with a second carriage part 26, to which the second core 12" is attached. The carriage part 26 is rod-shaped. The carriage part 25 has an L-shaped contour with a laterally projecting driving section 27, which is assigned to the second carriage part 26. In the starting position, as for example in 2A or 4 shown, the driving section extends across the housing 14 so that it lies between the slide part 26 and the end of the sleeve 12' of the second Bowden cable 12. If the setting device 7 is now triggered and the core 11" is pulled, the slide part 25 pulls the slide part 26 along so that the locking device 4 is unlocked. If the setting device 7 is not actuated, but the locking device 4 is actively unlocked by a user, the slide part 26 can be moved independently of the slide part 25 in the housing 14, whereby the core 12" can be pushed into the housing 14. This ensures that when the locking device 4 is intentionally unlocked without triggering the setting device 7, the Bowden cable 12 remains relaxed and does not hinder or complicate unlocking.

In contrast to the embodiment of 2A , in which the coupling device 13 is designed for coupling two Bowden cables 11, 12, the coupling device of 4 designed to couple three Bowden cables to one another, in particular the Bowden cables 11, 12 and 6. In this case, the Bowden cable 6 which can be operated by the user is connected to the coupling device 13 as the third Bowden cable 6 with a sleeve 6' and a core 6". For this purpose, the second slide part 26 has a receptacle 29 which essentially corresponds to the receptacle 17 and serves to receive a retaining element, in particular a ball element, of the core 6". In comparison to the receptacle 17, the receptacle 29 is designed to be significantly longer than the recess 17 when viewed in the pulling or pushing direction, so that the slide part 26 can be moved without applying a force to the retaining element of the core 6". The slide part 26 can therefore be moved independently of the setting device 7 and of the Bowden cable 6 or of the actuating lever 5.

Claims (11)

Safety system (12) for a locking element, in particular a front flap (2), which can be moved between a closed position and an open position on a body of a motor vehicle, with at least one locking device (4) by means of which the locking element can be locked in the closed position on the body, with at least one setting device (7) for setting the locking element in a protective position remote from the body, wherein the setting device (7) has at least one controllable actuator (9), and wherein the setting device (7) is connected to the locking device (4) by a Bowden cable device (10) in such a way that when the locking element is set up, the locking device (4) is actuated to release the locking element, characterized in that the Bowden cable device (10) has two Bowden cables (11, 12) connected in series by a coupling device (13), each with a core (11", 12"), wherein the coupling device (13) has a freewheel device (16) which, depending on a predetermined Traction path of one of the cores (11", 12") relative to a housing (14) of the coupling device (13) causes an interruption in traction between the cores (11", 12"). security system according to claim 1 , characterized in that the coupling device (13) has a driver (15) which is displaceably mounted in the housing (14) and to which the cores (11",12") are each fastened at one end, wherein the freewheel device (16) is designed to release the fastening of the first core (11") from the driver (15) depending on the predetermined pulling path of the first core (11") relative to the housing (14). security system according to claim 2 , characterized in that the driver (15) has a receptacle (17) on a side surface (19), in which a retaining element (18) which is fastened to the end of one core (11") lies in such a way that it cooperates positively with the driver (15) in the sliding direction of the driver (15). security system according to claim 3 , characterized in that the driver (15) has a recess (20) through which the one core (11") is led out of the receptacle (17) in the sliding direction of the driver (15). Security system according to one of the Claims 2 until 4 , characterized in that the freewheel device (16) causes or enables a release of the retaining element (18) from the receptacle (17) when the predetermined pulling path is reached. Safety system according to one of the preceding claims, characterized in that the freewheel device (16) has a cover (23) which is assigned to the housing (14) and also serves to guide the driver (15), wherein the cover (23) has a first section in which the cover (23) locks the retaining element (18) in the receptacle (17), and a second section adjoining thereto in the sliding direction, in which the retaining element (18) can emerge from the receptacle (17). Safety system according to one of the preceding claims, characterized in that the cover (23) in the second section has a recess (24) for receiving the retaining element (18). Safety system according to one of the preceding claims, characterized in that the receptacle (17) has a lifting slope (21) in the sliding direction, which is designed to force the retaining element (18) out of the receptacle (17) when a tensile force acts on the retaining element (18) through the core (11"). Safety system according to one of the preceding claims, characterized in that the driver (15) is designed as a slide which can be displaced in the housing (14), the sleeves (11', 12") of the Bowden cables (11, 12) being fastened to the housing (14) and the cores (11", 12") of the Bowden cables (11, 12) being fastened to the slide. Safety system according to one of the preceding claims, characterized in that the carriage has a first carriage part (25) and a second carriage part (26), wherein the first core (11") is fastened to the first carriage part (25) and the second core (12") is fastened to the second carriage part (26), and wherein the second carriage part (26) is displaceable independently of the first carriage part (25), and wherein the first carriage part (25) has a driving section (27) by means of which the second carriage part (26) is displaced together with the first carriage part (25). Motor vehicle with a body and with a closing element, in particular a front flap (2), which can be moved between a closed position and an open position, characterized by a safety system (1) according to one of the Claims 1 until 10 .

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