WO2006012848A1

WO2006012848A1 - Device for opening and closing a hatchback

Info

Publication number: WO2006012848A1
Application number: PCT/DE2005/001298
Authority: WO
Inventors: Olaf Kriese; Harald Krüger
Original assignee: Brose Fahrzeugteile Gmbh & Co. Kg, Coburg
Priority date: 2004-07-26
Filing date: 2005-07-20
Publication date: 2006-02-09
Also published as: DE102004036405A1

Abstract

The invention relates to a device for opening and closing a hatchback (2) mounted on a vehicle body (1) in an articulated manner, or a rear lid. According to the invention, the hatchback (2) or the rear lid can be pivoted by means of a telescoping spring device (3) supported on the hatchback (2) or the rear lid and against the vehicle body (1), said telescoping spring device (3) being supported on the vehicle body (1) and/or the hatchback (2) or the rear lid in a mobile manner. The force application point (4) can be displaced in the direction indicated by arrow C in such a way that the torque (spring force moment) exerted by the telescoping spring device (3) in relation to the articulation (10) of the hatchback (2) on the vehicle body (1) is smaller by a pre-determinable amount, when the hatchback (2) is closed, and larger by a pre-determinable amount, when the hatchback (2) is opened, than the weight moment of force exerted by the hatchback (2) in relation to the articulation (10) thereof on the vehicle body (1).

Description

Device for opening and closing a tailgate

description

The invention relates to a device for opening a tailgate or a boot lid according to the preamble of claim 1.

A tailgate or a rear lid arranged there for opening and closing an opening at the rear end or rear of a vehicle body is usually articulated in the region of the upper edge of the body opening, so that the body opening is opened by pivoting the tailgate about its articulation on the vehicle body can be released or closed. At the opposite end of the articulation of the tailgate, a locking device is provided, which can be locked with a arranged at the lower end of the body opening lock with the tailgate folded down.

To open the tailgate, the lock between the closing device of the tailgate and the lock is released, lifted the tailgate manually and pivoted about the Heckklappenanlenkung on the vehicle body. After the tailgate has been raised to a certain angle, it can, with the assisting lifting action of a telescopic spring device, set it up for a larger opening. be lifted so that the body opening completely released and thus the loading or transport space of the vehicle is accessible. In this case, the telescopic spring device secures the tailgate in the folded-up position by a force exerted on the tailgate force, which is greater than the weight of the tailgate with respect to their articulation on the vehicle body.

To close the body opening the tailgate is in turn manually against the force of Teleskopfedereinrichtung and supported by the weight of the tailgate to their articulation on the vehicle body in the direction of the arranged at the lower end of the vehicle body lock pivots to the Schieß¬ device on the tailgate in the castle engages and is locked with this. In this closing movement, the telescopic spring device is tensioned, so that once the latching of the tailgate on the tailgate lock and the manual actuation of the tailgate, a supportive lifting action when pivoting the tailgate is effective again.

Alternatively, according to DE 40 40 372 C2, an automatic opening and closing device for a tailgate can be provided, in which between the tailgate and the vehicle body, a drive device with a telescopically adjustable, mounted on the tailgate and the vehicle body Rohranord ¬ tion is provided, which is by means of a driven by a motor Verstellmecha¬ mechanism and retractable.

Instead of a telescopically adjustable, mounted on the tailgate and on the Fahrzeugkaros- serie tube assembly, an electric motor driven spindle or rack gear can be provided, which causes the opening and closing movement of the tailgate via a corresponding lifting arrangement.

Both during automatic and manual opening and closing of a tailgate of a vehicle considerable forces for pivoting the tailgate in the opening direction against the weight of the tailgate and pivoting in the closing direction against the spring force of Teleskopfedereinrichtung required. Die¬ se forces must be applied by an automatic tailgate adjustment by a corre sponding powerful drive device and a manual adjustment of the tailgate by the operating force of the user. A further factor in a manual tailgate adjustment is that as a result of the pivoting the tailgate to the articulation at the top of the Fahrzeugkaros¬ series, the lower end of the tailgate is pivoted so far up that their accessibility for users with lower range is no longer or only with physical effort.

Object of the present invention is to provide a device of the type mentioned, the zu¬ additionally supports the kinematics of the opening and closing movement of the tailgate.

This object is achieved by the features of claim 1.

The solution according to the invention supports the kinematics of the opening and closing movement of the tailgate by the movable support of the telescopic spring device on the vehicle body and / or on the tailgate and thus by changing the lever arm of the telescopic spring device with respect to the articulation of the tailgate, so that both at Manual as well as automatic operation of the tailgate a lesser power or effort is required. In an automatic operation, this makes it possible to use drive devices of lesser power and thus of smaller size.

Among other things, the solution according to the invention is based on the finding that the individual motion phases during opening and closing of a tailgate are to be optimized by the displacement of the point of application of the telescopic spring device on the tailgate and / or the vehicle body. As a result, in a further refinement of the solution according to the invention, the displacement of the point of force application for storing additional energy in the telescopic spring device can also be used after completion of an opening or closing movement, which in the first phase of an opening movement of the tailgate by ejecting it from the Verriegelungseinrich¬ tion is released by the telescopic spring device in the closed state of the tailgate by moving the force application point (again) stretched, so that for the next opening operation of the tailgate again enough energy is available or is stored.

With the solution according to the invention, depending on the available installation space and the weight of the tailgate, a suitable drive for shifting the force application point of the telescopic spring device can be used. Also depending on the Available space, the shift of the force application point and thus the An¬ order of the drive in the tailgate or in the vehicle body can be moved.

Accordingly, an embodiment of the solution according to the invention is to connect the telescopic spring device on the one hand via a pivot bearing stationary with the Fahr¬ convincing body and on the other hand to support the tailgate with a displaceable along an adjustment on the tailgate force application point.

Alternatively, the Teleskopfedereinrichtung be connected on the one hand via a pivot bearing stationary with the tailgate and on the other hand supported with a displaceable along an adjustment to the vehicle body force application point on the vehicle body.

The point of application of force is preferably displaceable so that the torque or spring force moment exerted by the telescopic spring device with respect to the articulation of the tailgate on the vehicle body is smaller by a predeterminable amount when closing the tailgate, and by a predetermined amount for opening the tailgate is as the force exerted by the tailgate in terms of their articulation on the vehicle body weight moment of force, in particular, the difference between the spring force torque and the weight moment of force is dimensioned such that collision or Einklemmkräfte not exceed a predetermined amount.

Furthermore, resulting from the kinetic energy of the tailgate Kollisions¬ or clamping forces by throttling the movement speeds of the tailgate, in particular by a device connected to the Teleskopfedereinrichtung or as part of Teleskopfedereinrichtung means for reducing and / or Be¬ limitation of the opening and closing speed of Tailgate to be limited.

In addition to a change of the lever arm caused by the displacement of the force application point of the force acting on the tailgate force of Teleskopfedereinrichtung with respect to the weight of the tailgate can by switching the Kraftangriffs¬ point of Teleskopfedereinrichtung after closing the tailgate, the telephoto scissors additionally for a renewed ejection of unlocked tailgate to be stretched by a predetermined amount. By tensioning the telescopic spring device in the closed state of the tailgate not only the Bedienungs¬ comfort by additional support the opening movement of the tailgate after unlocking, but distributed by a drive means for shifting the force application point power distributed to different periods, so that the use of a drive device of lower power and thus smaller size is possible and sufficient.

The displacement of the force application point preferably takes place by means of a drive device connected to the telescopic spring device via a force transmission element.

The power transmission element may optionally consist of a pitch cable in the form of a Bowden cable or in which the force application point of the Teleskopfedereinrichtung against the tensile force of the Bowden or cable is acted upon by a return spring, or consist of a flexible shaft, a rack or spindle gear.

The drive device may include an electric motor arranged in the tailgate or in the vehicle body or may be coupled with the electric motor of a window lifter, a roller blind drive, a lock or lock module or a rear window wiper to avoid an additional drive.

The solution according to the invention further enables effective collision or anti-trap protection by means of a sensor device which detects the opening or closing movement of the tailgate and which is connected to a collision and / or anti-trap device, the collision and / or anti-jamming device being discontinuous when detected by the sensor device the opening or closing movement of the tailgate stops or reverses the drive means for displacing the force application point of the telescopic spring device.

On the basis of exemplary embodiments illustrated in the drawing, the idea underlying the invention will be explained in more detail. Show it:

Fig. 1 - a schematic side view of a vehicle rear with closed

tailgate;

FIG. 2 shows a schematic side view of a vehicle rear with a partially opened tailgate; FIG. 3 is a schematic side view of a rear of the vehicle with the tailgate further opened by means of Verla¬ like the force application point of a Teleskopfederanordnung;

Fig. 4 to 6 - schematic representations of the change of the Federkrafthebelarms by a displacement of the support of Teleskopfedereinrichtung on the tailgate;

Fig. 7 is a schematic side view of a vehicle rear with displacement of the point of force application for closing the tailgate;

8 shows a schematic side view of a vehicle rear with the tailgate closed again;

9 shows a schematic side view as in FIG. 8 with displacement of the force attack point of the telescopic spring device with the tailgate closed;

10 shows a schematic side view of a vehicle rear with a drive device for shifting the force application point in the tailgate and FIG

11 shows a schematic side view of a vehicle rear with displacement of the point of force application of the telescopic spring device on the vehicle body.

In the drawing figures shown components with matching function have been provided with the same reference numerals, so that reference is made to non-cited reference numerals to the individual character descriptions on the corresponding designation and function description of these components in the other figures.

1 shows a side view of a vehicle body 1 in the rear region of a vehicle with a tailgate 2 pivotally connected to the vehicle body 1 about a pivot axis 10 which is perpendicular to the plane of the drawing, the end opposite the pivot axis 10 by means of a closing device or by means of a closing device Lock module 6 can be locked in the closed position shown in Fig. 1. To open the body opening of the vehicle body 1 closed by the tailgate 2, the closing device or the lock module 6 is unlocked and the tailgate 2 is pivoted upwards in the direction of arrow A manually or by means of an ejection mechanism about the pivot axis 10. As will be explained in more detail below with reference to FIGS. 8 and 9, after unlocking the tailgate 2, part of the spring energy stored in the telescopic spring device 3 becomes effective, thereby assisting the ejection of the tailgate 2 from the lock, so that a first opening movement occurs the tailgate 2 is effected without additional manual assistance.

Upon reaching a certain opening height arranged between the Fahrzeugkaros¬ series 1 and the tailgate 2 Teleskopfedereinrichtung 3 is effective and exerts a spring force in the direction of arrow B in FIG. 2, which supports the further opening of the tailgate 2 while doing the opposite to the opening movement acting weight force of the tailgate 2 is at least compensated, but preferably supported in the direction of a further opening movement.

The telescopic spring device 3 has a telescopic tube 31 and a telescopic rod 32 slidingly mounted in the telescopic tube 31, between which a spring element (not shown) is effective. As a spring element can be used on the telescopic tube 31 and on the telescopic rod 32 supporting compression spring, in particular a gas spring.

The telescopic tube 31 is fixedly supported on the vehicle body 1 via a pivot bearing 5, while the telescopic rod 32 is supported on the tailgate 2 via a movable point of force application 4.

According to the schematic illustration in FIG. 3, the movable force application point 4 of the telescopic spring device 3 can be displaced on a predetermined trajectory on the inside or a side edge or both side edges of the tailgate 2 in the direction of the arrow C for further opening of the tailgate 2, where ¬ is supported by the lever arm displacement, the opening movement of the tailgate 2 effectively sam.

In FIGS. 4 to 6 are schematically the various lever arms X ₁ , X ₂ and X ₃ with the tailgate 2 closed and when opening the tailgate 2 with a displacement of the force application point 4 entlag the predetermined trajectory on the tailgate 2 with respect to the pivot axis 10 of the tailgate 2 shown.

FIG. 4 shows the lever arm X ₁ which is effective when the tailgate 2 is closed and which is determined by the distance of the axis of the telescopic spring device 3 from the pivot axis 10 of the tailgate 2. After unlocking the tailgate 2 is opened by the spring energy stored in the Teleskopfedereinrichtung 3 in the direction of arrow B in FIG. 5. In this case, the force application point 4 of the telescopic spring device 3 is pivoted by means of a drive device connected to the force application point 4 and a force transmission element to the pivotally mounted on the vehicle body 1 pivot bearing 5, as a result of this pivotal movement of the lever arm X _{2 is} greater than the lever arm X. ₁ with closed tailgate 2.

For further opening of the tailgate 2, the force application point 4 of the Teleskopfeder- device 3 is moved along the predetermined path of movement on the tailgate 2 in the direction of arrow C and thus the lever arm X ₃ gegen¬ over the lever arm X _{2 of} FIG. 5 according to FIG further enlarged. The increased lever arm X ₃ causes an increase in the torque exerted by the telescopic spring device 3 on the tailgate 2, which is effective against the force exerted by the weight of the tailgate 2 with respect to the pivot axis 10 torque. As a result, the spring energy still stored in the telescopic spring device 3 and converted into an adequate spring pressure can be released in the direction of a further opening of the tailgate 2.

For closing the tailgate 2, the closing process according to FIG. 7 is initiated by a displacement of the force application point 4 of the telescopic spring device 3 on the tailgate 2 in the direction of the arrow D along the predetermined trajectory. The effective in relation to the pivot axis 10 of the tailgate 2 lever arm of Teleskop¬ spring means 3 and thus the force exerted by the Teleskopfedereinrichtung 3 on the tailgate 2 spring torque is reduced so that the resulting from the weight of the tailgate 2 with respect to the pivot axis 10 Torque is greater than the force exerted by the Teleskopfedereinrichtung 3 spring torque. The tailgate 2 is thereby moved in the direction of arrow E in FIG. 8 in the closing direction.

After reaching the closed position of the tailgate 2, in which the telescopic rod 32 of the telescopic spring device 3 is not yet completely inserted into the telescopic tube 31. Ren, the force application point 4 is moved in the direction of arrow F of FIG. 9 and thereby pushed the telescopic rod 32 completely into the telescopic tube 31, so that the telescopic spring means 3 stretched after closing the tailgate 2 for re-ejecting the tailgate 2 to open is.

Both when opening and when closing the tailgate 2, the displacement of the force application point 4 of the telescopic spring assembly 3 is controlled so that the Feder¬ torque for closing slightly smaller and to open slightly larger than that from the weight of the tailgate 2 with respect to the pivot axis 10 resulting weight moment of force. The difference between the spring force moment and the weight moment of force is designed so that the collision and / or Einklemm¬ forces can not exceed a predetermined limit. Collision or clamping forces resulting from the kinetic energy of the tailgate 2 can additionally be limited by throttling the speeds of movement of the tailgate 2 and, in particular, by a corresponding device connected to the telescopic spring device 3 in the manner of a shock absorber.

For further collision or entrapment force protection when opening and closing the tailgate 2, corresponding collision and anti-pinch protection devices can additionally be provided and connected to the drive device for shifting the point of force application 4 of the telescopic spring device 3. In particular, sensors can be provided which register a discontinuity of the opening or closing movement of the tailgate 2 and thus a collision or pinching case and initiate suitable countermeasures via a connection with a collision or anti-pinch device.

10 shows, in a schematic side view of the rear end of a vehicle with the tailgate 2 open, the arrangement of a device for displacing the force application point 4 of the telescopic spring device 3 along a movement path provided in the tailgate 2. For this purpose, a drive motor 7 is provided in one of the articulation of the tailgate 2 on the pivot axis 10 opposite region, which is connected via a force transmission element 8 with the force application point 4 of the Teleskopfederein¬ device 3. The power transmission element 8 is either tension-resistant and pressure-resistant, so that a displacement of the force application point 4 is ensured in both directions, or it is only a Zug¬ forces transmitting component such as a pull rope or a Bowden cable, a train or Compression spring is associated, which is effective against the tensile force of the pull cable or Bowden cable. As on tensile and compressible force transmission element is a spindle, rack or lever mechanism, a pitch cable or the like in question.

FIG. 11 shows a kinematic reversal of the force application point 4 of the telescopic device 3 on the vehicle body 1, in which the stationary pivot bearing 5 of the telescopic spring device 3 is arranged on the tailgate 2. Analogous to the above-described embodiment of an arrangement of the force application point 4 of the telescopic headrest device 3 on the tailgate 2, the lever action of the telescopic spring device 3 is effectively supported by opening and closing the tailgate 2 by displacing the force application point 4, by virtue of the telescoping element being displaced by the telescopic end Direction 3 is exerted spring force torque in terms of the weight moment of force by changing the lever arm is optimized.

In the embodiment shown in FIG. 11, the drive device 7 may be provided in the region of the lock module or a locking device on the vehicle body 1 and a force transmission by means of a Kraftübertragungsele¬ element 9 as described in connection with FIG. 10 to the force application point 4 of Teleskopfedereinrichtung 3 done.

The drive device 7 can be replaced both by an arrangement in the tailgate 2 according to FIG. 10 and in an arrangement in the vehicle body 1 according to FIG. 11 by an already existing drive device which is suitably actuated to execute a double or multiple function , For example, in the arrangement according to FIG. 10, the drive device 7 can be replaced by the drive motor of a closing device provided in the tailgate 2 for central locking or by a windscreen wiper motor for a rear window wiper.

With an arrangement of the drive device 7 in the body region, a closing device for locking the tailgate 2, a closing aid or the like in double or multiple function can fulfill the task of the drive device 7. LIST OF REFERENCE NUMBERS

1 vehicle body

2 tailgate

3 telescopic spring device

31 telescopic tube

32 telescopic pole

4 force application point of Teleskopfedereinrichtung

5 stationary pivot bearing of Teleskopfedereinrichtung

6 locking device or lock module

7 drive motor

8 Power transmission element 10 Swivel axis Xi, X2 _> X3 Lever arms

Claims

claims

1. A device for opening and closing a tailgate (tailgate) which is articulated to a vehicle body and pivotable with the assistance of a supported on the tailgate and on the vehicle body Teleskopfedereinrichtung,

marked by

a portable support of the telescopic spring device (3) on the vehicle body (1) and / or on the tailgate (2).

2. Apparatus according to claim 1, characterized in that the Teleskopfeder¬ device (3) on the one hand via a pivot bearing (5) fixedly connected to the Fahrzeugka¬ rosserie (1) and on the other hand with a displacement along an adjustment on the tailgate (2) displaceable force application point (4) supports the tailgate (2) ab¬.

3. A device according to claim 1, characterized in that the Teleskopfeder¬ device (3) on the one hand via a pivot bearing (5) fixedly connected to the tailgate (2) and on the other hand with a along a Verstellstrecke on the vehicle body (1) displaceable force application point (4) is supported on the vehicle body (1).

4. Apparatus according to claim 2 or 3, characterized in that the Kraftan- grip point (4) is displaceable, that of the Teleskopfedereinrichtung (3) in

Relative to the articulation (10) of the tailgate (2) on the vehicle body (1) applied torque (spring force) when closing the tailgate (2) smaller by a predetermined amount and to open the tailgate (2) by a predetermined amount is greater than that of the tailgate (2) with respect to the articulation (10) on the vehicle body (1) exerted weight moment of force.

5. The device according to claim 4, characterized in that the difference zwi¬ tween the spring force moment and the weight moment of force is dimensioned such that collision or Einklemmkräfte not exceeding a predetermined amount th.

6. The device according to at least one of the preceding claims, characterized ge indicates that the opening and closing speed of the tailgate (2) is limited.

7. Apparatus according to claim 6, characterized by a means connected to the Teleskopfeder¬ device (3) or as part of the Teleskopfedereinrichtung (3) trained device for reducing and / or limiting the opening and

Closing speed of the tailgate (2).

8. The device according to at least one of the preceding claims, character- ized in that the force application point (4) of the Teleskopfedereinrichtung (3) with closed tailgate (2) for tensioning the Teleskopfedereinrichtung (3) by a predetermined amount is displaceable.

9. Device according to at least one of the preceding claims, characterized ge indicates that the force application point (4) via a power transmission element (8, 9) with a drive device (7) is connected.

10. The device according to claim 9, characterized in that the Kraftübertra¬ transmission element (8, 9) consists of a pitch cable, Bowden cable or cable.

11. The device according to 10, characterized in that the force application point (4) of the Teleskopfedereinrichtung (3) is acted upon against the tensile force of the Bowden cable or Seil¬ zuges with a return spring.

12. The device according to claim 9, characterized in that the force transmission element (8, 9) consists of a flexible shaft, a rack gear or ei¬ nem spindle gear.

13. The device according to claim 9, characterized in that the Antriebseinrich¬ device (7) consists of a in the tailgate (2) or in the vehicle body (1) ange¬ arranged electric motor.

14. The apparatus of claim 9 or 13, characterized in that the An¬ drive device (7) ge coupled to the electric motor of a window regulator, a Rolloan¬, a lock or lock module or a rear window wiper.

15. The device according to at least one of the preceding claims, gekenn¬ characterized by a the opening or closing movement of the tailgate (2) er¬ captive and affiliated with a collision and / or anti-pinch ne sensor device.

16. The apparatus according to claim 15, characterized in that the collision and / or anti-trap device in a detected by the sensor discontinuity of the opening or closing movement of the tailgate (2) the An¬ drive means (7) for displacement of the force application point (4) Teleskopfe¬ device (3) stops or reversed.