瑞典专利SE533804C2 Hiding device for a bonnet with pedestrian protection

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专利摘要:
The invention relates to a front door hinge for a motor vehicle with a hinge leg (2) to be mounted on the body and an additional hinge leg (1) to be mounted on the front door, the two hinge legs (1, 2) having a first mutual pivoting position. , which is a closed position of the front cover, and a second mutual pivoting position, which corresponds to an open position of the front cover, and with a lifting mechanism, which has a piston (3) and a cylinder (4), for separating the two hinge legs (1, 2 ) from the mutually first pivoting position to a disassembled position, the piston (3) of the lifting mechanism being held in the disassembled position relative to the cylinder (5) by means of a releasable friction or mold-connected joint. In order to increase pedestrian protection, it is proposed that the dissolution of the friction or form-bonded joint takes place through the kinetic energy of a pedestrian trapped on the front door through the braked displacement back from the disassembled position to the first pivot position. Fig. 1
公开号:SE533804C2
申请号:SE0900222
申请日:2009-02-20
公开日:2011-01-18
发明作者:Frank Haunsetter；Werner Warmke；Timm Dellmann
申请人:H C F Porsche Aktiengesel Lschaft Dr Ing；
IPC主号:

专利说明:

20 25 30 533 804 2 to partly loosen a lock and partly to shift the hinge leg mounted on the front cover to a disassembled position.
The previously mentioned front door hinges have the task of keeping the front door pivotable on the body in a normal position of use, whereby the front door can be swung from a closed position to an open position. The closed position then corresponds to the first hinge position. On a motor vehicle equipped with a front hatch of the type in question, crash sensors are arranged, which trigger when a pedestrian is hit. When the sensor is tripped, a pyrotechnic charge is ignited, which drives the piston out of the cylinder and thereby ﬁ sleeves the two articulated cutting clearances from each other. This separated position of the two hinge cutting blades corresponds to a lifting position or pedestrian protection position of the front door. If the pedestrian falls on the front door, the latter can, thanks to the raised position, give way downwards so that the pedestrian impact can be damped.
The task is to increase pedestrian protection at a footpath of the type in question.
This task is solved by the invention stated in the claims, wherein each patent claim states an independent solution to the task and can be combined with any other patent claim.
The solution according to the present invention relates to a front door hinge for a motor vehicle with a hinge article to be mounted on the body and an additional hinge article to be mounted on the front door. The two hinge legs can assume a mutual first pivoting position, which corresponds to a closed position of the front cover, and a second mutual pivoting position, which corresponds to an open position of the throne cover. A lifting mechanism comprises a piston and a cylinder, for mutually separating the two hinge cutter from the first pivoting position to a disassembled position, the piston of the lifting mechanism being held in the disassembled position by means of a releasably shaped connection relative to the cylinder. The form-fitting drying strap 10 15 20 25 30 533 804 3 is designed to absorb the kinetic energy of a pedestrian caught by the front door through a braked displacement back from the disassembled position to the first pivot position. The releasably shaped bond is formed by a tooth engaging member which engages in an outer toothing of the piston, and by a ring arranged on an edge of the cylinder which forms the tooth engaging member and has a web which engages in the ring opening and in the tooth gaps of the outer toothing. .
First and foremost, it has been arranged that the releasably shaped band absorbs the kinetic energy of the pedestrian caught by the front door by means of a braked dry shot back from the illuminated position to the first pivot position. In an unfortunate collision, the pedestrian hits the front door with his head. In order to reduce the risk of injury, the kinetic energy is absorbed by the front cover with the heating measures, whereby the front cover is displaced downwards a certain distance. This is slowed down by the dissolved form-fitting bandage. The kinetic energy is therefore converted into friction energy or into deformation energy of the form-bonded joint. In terms of construction, the piston then has an external toothing, in which an actuating element engages. The external ignition can be designed as axial tooth life. Preferably, however, it is a circumferential toothing, for example a thread or a number of peripheral ribs arranged next to each other in the axial direction of the shaft. The tooth engaging member engages the rib gaps. Different types of braking force generation are possible. For example, the tooth engaging element may consist of a hard material, for example of hardened steel. The teeth of the external ignition have a soft material and a corresponding material thickness, so that they can be cut off by the tooth engaging element during the return firing. In this case, the tooth geometry and the material hardness of the toothing are chosen in such a way that a predetermined force is required before the piston is displaced back into the cylinder. In a further embodiment of the opening, the tooth engaging element is formed by a steel ring, which forms radially inwardly directed webs. These lives interfere with the tooth gaps of the external toothing. If the web consists of a softer material, the web passes through the teeth both at the ejection and at the insertion of the piston. Alternatively, the webs abut against an edge so that they cannot yield when the piston is inserted into the cylinder. They then act as a cut-off in this movement of the piston. If, on the other hand, the piston is driven out of the cylinder by the pyro-technical charge. To lift the front cover, the web can give way. Preferably, the teeth in this embodiment have a sawtooth shape. If the tooth engagement element should only give way after resilience, then the teeth have a rounded cross-sectional contour or the tooth gaps and teeth have a wave shape.
In a further embodiment of the invention, either the hinge leg mounted on the body or the front cover is designed in two parts. This hinge leg consists partly of a mounting part, with which the hinge leg is mounted on the body or on the front cover, and partly the hinge leg has a pivoting part, which is pivotally connected to the other hinge cutting cell. This can be done over a pivot bearing, for example over a hinge shaft. However, it is also possible that the two hinge legs are connected to each other with links to form a four-joint hinge. In the event of a collision, the mounting part and the pivot part are displaced relative to each other by the pyrotechnic element to bring the front cover to a raised position. In normal use mode, the mounting part and the pivot part are rigidly connected to each other. For this, in a preferred embodiment of the invention, a hook is used. This hook is preferably released by the piston of the lyre mechanism. In the locked position, an elastic pad, which is coordinated with the mounting part or the pivoting part, abuts against an abutment surface of the corresponding second part, ie. the oscillating part or the mounting part. In the locked position, the hook is thus kept taut by the tubular duct element. The cushion therefore enables an overlay to hook the undercut hook surface under a locking ledge.
In a further embodiment of the invention, one of the two parts of a hinge cutting cell, i.e. mounting part or swing part, a lock ﬂ ik. This lock is not in the normal position of use, ie. in the position in which the mounting part is locked on the pivot part, in a V-shaped or Y-shaped recess. This catch slot formed by the recess extends transversely to the direction of extension of the hinge leg, thereby providing a stabilization of the hinge in the normal position of use in the axis direction of the pivot axis of the hinge.
Exemplary embodiments of the invention are described in more detail below with reference to the accompanying drawings, in which: Figs. 1 is a side view of a front hatch hinge in a first pivot position, which corresponds to a closed front hatch, ﬁ g. 2 is a front view according to arrow II in ﬁ g. 1, ﬁ g. 3 is a view similar to ﬁ g. 1 but in a second swing position, which corresponds to an open front hatch, ﬁ g. 4 is a view similar to FIG. 1 at triggered pyrotechnic element in a disassembled position, ﬁ g. 5 is a view similar to ﬁ g. Fig. 4 is a partially sectioned detail view of a piston-cylinder unit in an operating position according to ﬁ g after a displacement partly back from the disassembled position. 1, ﬁ g. 7 shows an enlarged part of ﬁ g. 6, ﬁ g. 8 is a section taken along the line VIII-VHI in ﬁ g. 7, ﬁ g. 9 is a view similar to ﬁ g. 7, where the piston has been pushed out of the cylinder, ﬁ g. 10 is a view similar to ﬁ g. 7 but in an operating mode according to ﬁ g. 4, ﬁ g. ll is a view similar to ﬁ g. 7 but in an operating mode according to ﬁ g. 5, ﬁ g. 12 is a view similar to ﬁ g. 11 of a second embodiment, in which the piston has a serrated tooth, ﬁ g. 13 is a view similar to ﬁ g. 11, at which the ribs of the toothing show rounded tips, ﬁ g. 14 is a view similar to ﬁ g. 11, in which the toothing is wavy and the tooth engaging element engages ﬁ erectly in the wave valleys, ﬁ g. 15 is a perspective view of the hinge in an operating position according to ﬁ g. 1, wherein the pyro-technical element is hidden by a cover 28, ﬁ g. 16 is a view similar to ﬁ g. 15 with removed cover, and 10 15 20 25 30 533 804 ﬁ g. 17 is a perspective view seen from behind.
The front door hinge shown in the drawings consists of a first hinge leg 1, which can be screwed onto a front door of a motor vehicle. The main components of the first hinge leg are a mounting part 1 ", which is directly attached to the front cover, and a pivot part 1", which is connected to a second hinge leg 2 over a hinge 20. The second hinge leg 2 is screwed on body. 1 in normal use mode, as shown in ñg. 1-3 and 15-17, the mounting part 1 'is fixedly connected to the pivot part 1 ”, so that the front cover can be pivoted from it in ﬁ g. 1 showed the closed position of the one in ﬁ g. 3 showed the open position and back again.
The mounting part 1 'is partly connected to the pivot part 1 "over a hinge 21, and partly connected to the pivot part 1" by means of a hook 12. The hook 12 is pivotally connected to a hinge shaft 18 with the mounting part 1' and grips with its hook opening under a locking ledge 13 of the oscillating part 1 ”. Thereby the mounting part 1 'forms a projection facing the pivot part 1 ", which forms a curved groove 23. This curved groove 23 forms a guide slot for a guide pin 22, which is connected to the pivot part 1".
An angle 30 of the mounting part 1 'has two openings, into which a rubber element 14 is inserted. The pad 14 abuts in it in ﬁ g. 17 shows the locked position compressed against an abutment surface 15 of the pivot part 1 ”. The cushion 14 forms an over-lift cushion to securely lock the hook 12 with its under-foam hook side against the locking ledge 13.
The hook 12 forms a two-armed lever. The arm lying opposite the hook surface is in the form of an angle of an actuating ledge 19. This has an opening 32. A tip 26 of a piston 3 projects into this opening 32. The piston 3 extends into a cylinder. 7 linder 4. The latter forms a bearing part 25, which is inserted in a bearing bowl 24 of the pivoting part 1 ”. The operating ledge 19 then extends through a window 29 of the mounting part 1 ". A wall of this window forms an oscillation restriction for the lever.
The mounting part 1 'also forms a lock ﬂ ik 17, which in the locked position, i.e. in the normal operating mode, engages in a trapping slot 16. The trapping slot is V-shaped or Y-shaped. The surfaces of the slot diverging from each other in the opening direction of the catch slot 16 form guide surfaces, so that the two hinge leg parts 1 ', 1 ”in the locking position are in the secured position also in the direction of the pivot axis of the hinge 20. Preferably, the Y-part of the capture slot 16, in which the lock 17 engages in the locking position, has a gap width which is only slightly greater than the material thickness of the lock 17. This minimizes the play in the transverse direction. The lock 17 is preferably formed by the sheet metal piece of the mounting part 1 'which also has the hook 12.
The piston-cylinder unit 3, 4 forms a pyrotechnic element. In cylinder 4 there is a pyrotechnic charge, which can be ignited. In this case, the ignited pyro-technical charge accelerates the piston 3 out of the cylinder 4. First, the piston 3 abutting against the control ledge 19 pivots the hook 12, so that it pivots from the locking position to the open position. During the pivoting movement, the hook 12 leaves the hook ledge 13, so that the mounting part 1 'can be pivoted about the pivot axis 21. The hook 12 is pivoted until the operating ledge 19 strikes the wall of the window 23. Thereafter, the linear piston ejection movement the pivot leg 1 from the second pivot leg 2. The force begins directly in the mounting part 1 "due to the abutment of the operating ledge 19 against the wall of the window 23. The mounting part 1 'then pivots about the pivot shaft 21 relative to the pivot part 1", which in turn pivots about the pivot shaft. Relative to the hinge leg 2. The disassembled position of the hinge cutter 1, 2, which corresponds to a raised position of the front cover, is shown in ﬂ g. In this position, the front cover is held either by a friction locking joint or by a form-fitting joint.
By tig. 7 it appears that a ring 5 abuts against an end face surface 9, which is formed on the edge of an opening of the cylinder, in which the piston 3 is located. The ring 5 is a steel ring, the outer periphery of which lies below a locking ring 10 inserted in a locking groove 11. As shown in ﬁ g. 8, the steel ring has radially inwardly directed annular webs 6. The mutual distance between the end edges of the webs 6 is smaller than the diameter of annular beads 77, which are arranged around the piston 3. The annular bead members form tooth ribs, between which tooth gaps 8 are arranged. The ribs 7 can be produced as single ribs or as threads. When the piston 3 is pushed out of the cylinder 4, the radially inner part of the ring 5 can give way in the direction of movement of the piston 3, as shown in ñg. 9. The end edges of the webs 6 for ﬂ are then surface over the teeth 7. However, they can engage the tooth gaps 8 with a small play. The ejection of the piston 3 takes place in a friction-locked manner. However, the force of the discharged pyrotechnic charge is significantly higher, so that this friction does not lead to any appreciable delay in the lifting of the front cover.
In the raised position, the web 6 engages in a tooth hatch 8 to thereby lock the piston 3 in a pre-bonded manner.
The ribs 7 have such a small material thickness or such a small material hardness that they can be cut off by the webs 6 consisting of a hard material, in particular of hardened steel, when the piston 3 is actuated in the direction of insertion. This happens, for example, when a pedestrian falls towards the front door. At a substantially constant or reduced speed, the front cover is then lowered from it in ñg. 4 showed the raised position via the i ﬁ g. 5 shows the intermediate position to the lowered position. This dampens the pedestrian's impact energy. 10 15 20 25 30 533 804 9 I ﬁ g. 11 shows how the individual tooth ribs 7 are cut off at least arealy by the edge of the web 6 during the dissolution of the form-bonded liner. In order to develop the optimum cutting effect, the inner diameter of the ring edge 9, against which the ring S abuts, has a diameter which is only slightly larger than the outer diameter of the tooth ribs 7. Preferably the tips of the tooth ribs 7 are in abutting contact with the wall of the hole 27. forms a control for the piston 3.
It is mainly the top sections of the ribs 7 that are cut off, so that the part of the piston 3 present in the interior of the cylinder 4 only has tooth mutilations 7 ”in corresponding places.
At that in ﬁ g. 12, the teeth have a sawtooth shape, the oblique sides of the sawtooths guiding the ring web 6 to it in ﬁ g. 9 shows the raised position when projecting the piston 3 from the cylinder 4. The steep anchors, on the other hand, abut at a load in the opposite direction to the web 6. An axial load of the piston 3 here leads to an at least partial cutting of the ribs 7, so that only truncated ribs - leaves 7 'remaining.
At that in ﬁ g. 13, the ribs have 7 rounded tops and lie close together. Here, too, the tops of the ribs are cut off at least in part during the rebound, so that truncated parts 7 'remain.
That i ﬁ g. 14 has a wavy tooth shape. In this exemplary embodiment, the piston 3 is held substantially frictionally in the raised position.
The tooth engaging element 6 there is an elastic ring which can slide over the waves. In contrast to the previously described exemplary embodiments, no form-bonded joint is dissolved here by a material destruction. Rather, it is a friction lock that can be overcome in a deformation-free way.
Since the pyrotechnic elements are disposable items, it is in ﬁ g. 7-13, the soluble form-bonded dressing is preferred. All the features shown are in themselves essential to the invention. The present application also includes in its entirety the content of the accompanying / attached priority document (transcript of a previous application), and also for this purpose features from this priority document are included in the present application.

权利要求:
Claims (18)
[1]
A front door hinge for a motor vehicle with a hinge cutter (2) to be mounted on the body and an additional hinge cutter cell (1) to be mounted on the front cover, the two hinge legs (1, 2) being able to assume a mutual first pivoting position, which corresponds to a closed position of the front cover, and a second mutually pivoting position, which corresponds to an open position of the front cover, and with a lifting mechanism, which comprises a piston (3) and a cylinder (4), for mutually separating the two the hinge legs (1, 2) from the first pivoting position to a disassembled position, the piston (3) of the lyne necarism being held in the disassembled position by means of a releasably shaped bond relative to the cylinder (5), characterized in that the molded joint is designed to receive the kinetic energy of a pedestrian intercepted by the unlocked by a decelerated displacement back from the disassembled position to the first pivoting position, that the releasable form-fitted joint is formed by a tooth engaging element (5, 6) which engages in an outer tooth (7, 8) of the piston (3), and by a ring (5) arranged on an edge (9) of the cylinder (4), which forms the tooth the gripping element and has a web (6) which engages in the ring opening and in the tooth gaps (8) of the external toothing.
[2]
Front door hinge according to claim 1, characterized in that the tooth engaging element (6) is so hard and the teeth (7) so soft that the latter are cut off by the tooth engaging element (6) during the rearward displacement.
[3]
Front door hinge according to one of Claims 1 to 2, characterized in that the tooth engaging element (6) passes over the teeth (7) during the displacement to the disassembled position.
[4]
Front hatch hinge according to one of Claims 1 to 3, characterized by! by the teeth (7) being formed by a threaded rib or by a plurality of circumferential ribs. 10 15 20 25 30 533 804 19k
[5]
Front door hinge according to one of Claims 1 to 4, characterized in that the teeth (7) have rounded tooth tips.
[6]
Front hatch hinge according to one of Claims 1 to 4, characterized by! because the teeth (7) have a sawtooth shape.
[7]
Front door hinge according to one of Claims 1 to 4, characterized in that the teeth (7) and the tooth doors (8) form a wave shape in which an elastic tooth engaging element (6) engages.
[8]
Front hatch hinge according to one of Claims 1 to 7, characterized! in that one of the two hinge legs (1) forms a mounting part (P), with which the one hinge leg (1) is mounted on the ﬁ opening, and a pivot part (1 "), which move relative to each other in the first pivot position during the displacement ﬁ to the disrupted oscillation position.
[9]
Front door hinge according to Claim 8, characterized in that the mounting part (1 ') is hingedly connected to the pivot part (1').
[10]
Front hatch hinge according to claim 8 or 9, characterized! in that the piston (3) together with the cylinder (4) forms a pyrotechnic lifting unit, the pyrotechnic lifting unit being pivotally mounted in the mounting part (F) in relation to the pivoting part (1 ”).
[11]
11. ll. Front door hinge according to one of Claims 8 to 10, characterized by a hook (12) which keeps the mounting part (P) locked in a normal drive position on the pivot part (1 ”).
[12]
Front door hinge according to Claim 11, characterized in that the hook (12) is displaceable by the piston-cylinder unit (3, 4) sitt from its locking position to a released position, in which the mounting part (1 °) can be displaced in relation to the oscillation part (l ”). 10 15 20 25 533 804 15
[13]
Front door hinge according to one of Claims 9 to 12, characterized in that the mounting part (1 ”) is hingedly connected to the pivot part (1”) over a pivot axis (2 1).
[14]
Front door hinge according to one of Claims 8 to 13, characterized in that the pivot part (1 ”) is hingedly connected to the second hinge leg (2) at a hinge (20).
[15]
Front door hinge according to one of Claims 11 to 14, characterized by a pad element (14) associated with the mounting part (1 ") or the pivot part (1"), which in the normal operating position abuts pre-tensioned against an abutment surface (15) of the pivot. The mounting part (1 ”) or the mounting part (1”) was used to keep the hook (12) actuated in the locking position.
[16]
Front hatch hinge according to one of Claims 8 to 15, characterized by! formed by a lock ﬂ ik formed by the mounting part (1 ”) or the pivoting part (1”), which in the normal operating position is inserted in a V- or Y-shaped catch groove (16) of the pivoting part (1 ') or the mounting part (1). ”).
[17]
Front door hinge according to one of Claims 1 to 16, characterized in that a round bearing part (25) of the cylinder (4) is placed in a bearing shell (24).
[18]
Front door hinge according to one of Claims 11 to 17, characterized in that a tapered tip part (26) of the piston (3) engages in an axing hole (32) of an operating ledge (19) associated with the hook (12).

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同族专利:

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DE102020118983A1|2020-07-17|2022-01-20|Bayerische Motoren Werke Aktiengesellschaft|HINGE FOR ADJUSTING A FRONT HOOD FROM A NORMAL POSITION TO A PROTECTIVE POSITION|

法律状态:

优先权:

申请号 | 申请日 | 专利标题

DE200810011722|DE102008011722A1|2008-02-28|2008-02-28|Engine bonnet hinge for motor vehicle, has piston held at distant position by connection whose detachability absorbs kinetic energy of pedestrian caught in bonnet by braked displacement from distant position into pivoting position|

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