DE10217784B4 - Drive device for an adjustable vehicle part - Google Patents

Abstract

Drive device for an adjustable vehicle part
with a drive motor (6) which is attached to a pivotably mounted motor mount (4) and which is adjustable with the motor mount (4) between a drive position in which a driven element (62) of the drive motor (6) which can be driven in rotation can be moved with a drive engagement stored transmission element (82) of the adjustable vehicle part (8), and an emergency actuation position in which the output element (62) is disengaged from the transmission element (82), and
with an emergency actuation device which has at least one emergency actuation element (121) which, in its releasably locked rest position, holds the drive motor (6) with the motor mount (4) in the drive position and which, after it has been removed from its rest position, causes the drive motor to pivot (6) with the motor mount (4) in the emergency operating position.

Description

The present invention relates to a drive device for an adjustable vehicle part by means of an emergency operating device brought out of their drive engagement with the adjustable vehicle part can be.

Such drive device can be provided for adjustable vehicle parts such as a foldable soft top, a foldable soft top compartment or a trunk lid. In the case of electrically or hydraulically operated vehicle parts, at least one drive motor is required, which usually drives a handlebar of a folding mechanism via a transmission. The driven handlebar is part of a statically determined articulated multi-link transmission or linkage that can provide space-saving pivoting of the adjustable vehicle part. Such adjustment kinematics can be seen, for example, in EP 1 038 710 A1 out.

In the event of a failure of the electrical or hydraulic drive based on a failure of the vehicle electrical system or a defect in the drive itself, there is a risk that the adjustable vehicle part in an open position or in a Intermediate position persists and opposes manual operation. This is especially the case with self-locking drives a relatively large gear ratio of a relatively compact and fast rotating electric drive motor against one for example due to a heavy folding roof relatively large resistance working convertible top kinematics. This is typically a worm gear with gear ratios of 1:20 and larger used. Should the driven handlebar still move in the event of a system failure a so-called emergency actuation device is required.

A drive device with an emergency actuating element is, for example, from the DE 198 41 350 C1 known. In this drive device for an adjustable vehicle part, a rotatable emergency actuation element is provided which drives the shaft of a drive motor in the event of an emergency actuation, the speed of the emergency actuation element being higher than the speed of the drive element.

A drive device for pivoting a folding top of a motor vehicle is also from the DE 34 20 016 C2 known. In this case, by loosening a screw, an adjusting link can be separated from a gear unit having a planetary and spur gear, whereby the convertible top can be operated manually in the event of an emergency operation. Furthermore shows the DE 38 26 411 A1 a drive device for actuating a vehicle top, in which a worm and a spur gear reduction gear are provided between the electric drive motor and the output shaft for actuating a joint mechanism. The spur gear reduction gear has a clutch, with which the connection from the worm gear to the output shaft can be disengaged by a manual actuation in order to be able to actuate the convertible top manually.

A drive device for an electrically operated sunroof goes out of the DE 26 26 014 C2 in which a manual operation is made possible by releasing a positive connection between a motor shaft and a drive reduction. The positive connection can be separated by means of a disconnect coupling or by swiveling an intermediate gear. After all, is out of DE 30 30 642 C2 a drive device for an adjustable sliding cover of a motor vehicle roof is known, in which a gear reduction can be interrupted by pivoting an intermediate gear.

The known emergency actuators have the disadvantage that simple, manual operation of the movable Vehicle part, as is the case with non-electrically or hydraulically driven parts the case is usually not possible is. Rather, the emergency operating element are operated by means of hand cranks or the like and ensures this Way for a pivoting or moving the vehicle part. The space requirement for the Hand crank is usually annoying. In addition, the known emergency actuators usually require a lot of effort.

The object of the invention is a simple and compact drive device with an emergency operating device for a adjustable vehicle part to provide that in easier Wise and also manually operable is.

This task is accomplished by a drive device solved with the features of claim 1. Advantageous further training the invention result from the dependent claims.

In the drive device according to the invention it is provided that a pivotable when the emergency actuating element is locked engine support with an electric drive motor attached to it in a first Position or drive position with a transmission element of the adjustable Vehicle part in transmission intervention is connected and that when solved Notbetätigungselement the engine mount in a second position or emergency actuation position pivotable is. The output element is in this second position of the electric drive motor in particular outside of the transmission intervention with the transmission element.

The drive device according to the invention has the advantage that with self-locking drives and in particular with electric drive motors gates with self-locking worm gear transmissions, a simple and problem-free manual actuation of the adjustable vehicle part is possible if the vehicle electrical system fails or the drive motor is defective. In particular in the case of strongly reduced speed ratios of a relatively compact and high-revving drive motor for actuating relatively heavy vehicle parts, the transmission usually has to be designed to be self-locking and cannot be moved manually. Here, the drive device according to the invention enables a remedy by interrupting the engagement of the drive.

By attaching the electrical Drive motor with its output element, for. B. a worm gear, on a swiveling motor mount can be done by simply removing an emergency actuator from its Locking an output element of the drive motor from the transmission or meshing or meshing with the transmission element to operate the adjustable vehicle part can be pivoted.

Preferably close the first position and the second position of the motor mount a swivel angle about a swivel axis of a few degrees, so that a straight sufficient swivel angle is given to the drive or gear pair from their transmission or gearing or combing bring to.

An embodiment of the invention provides before that the detachable Emergency actuator one Unlocking bolt includes. This can easily be done manually deducted or solved, for example, by means of a cable actuation, whereby the engine mount be pivoted in the plane of the drive elements or laterally can. Alternatively, the detachable Notbetätigungselement a hook, a rotary trap or the like.

The output element is preferably the drive device is driven by the electric drive motor Gear that with a transmission element is in meshing engagement in the form of a gear segment.

According to a preferred embodiment of the Invention has the engine mount when the emergency actuation element is released a horizontal pivot axis that is substantially parallel arranged to the axes of rotation of the output and the transmission element is. In this way, the motor mount can be particularly simple be pivoted downwards, causing the gears to turn off their intervention can be brought. An alternative embodiment provides that the engine mount when solved Notbetätigungselement has a vertical pivot axis that is substantially perpendicular arranged to the axes of rotation of the output and the transmission element is. This is the engine mount pivoted sideways so that the gears meshed laterally out of their Intervention be pushed. Depending on the in the vehicle disposal one or the other variant is preferred become.

The transmission element is preferably non-rotatable connected to a main link of the adjustable vehicle part. The main link can, for example, be part of a foldable soft top of a motor vehicle.

Further preferred configurations the invention result from the dependent claims as well from the following description of the figures.

The following is a drive device according to the invention based on the attached Exemplary drawings closer explained. It shows:

1 is a schematic perspective view of a drive device according to the invention with an emergency operating device for an adjustable vehicle part;

2 a drive device accordingly 1 with emergency actuating element released from a lock;

3 the drive device according to the invention with the motor bracket pivoted downward;

4 a detailed section according to 3 in a schematic side view; and

5 a detail of a variant of the drive device according to the invention in plan view from above.

1 shows a drive device according to the invention for an adjustable vehicle part. The exemplary embodiment shown shows one of two actuating devices for an electrically operated folding top of a motor vehicle. There is a plate-shaped main bearing on each side of the vehicle approximately at the level of a C-pillar 2 by means of at least two attachment points 21 screwed or otherwise fastened to the vehicle body. The main camp 2 consists preferably of a steel sheet. On an upper area of the main bearing arranged essentially vertically in the vehicle 2 is a first camp 24 as well as a second warehouse 25 intended. In the first camp 24 is a main link 8th of the folding top and a transmission element in the form of a gear segment 82 pivoted. In the second camp 25 is a main pillar 10 of the folding top is pivotally mounted, which is further above via a connecting bolt 102 with the main link 8th is pivotally connected and in this way forms an articulated mechanism with it. On the main pillar 10 a seal for a rear side window is usually attached.

At a lower area of the main warehouse 2 this has a narrower boom 22 on which at its end a third camp 26 having. At this third camp 26 is an engine mount 4 pan stored in cash. The engine mount 4 consists essentially of two elongated, flat sheets, namely a front support part 42 and a rear support part 43 which are arranged essentially parallel to one another. At one end are the front support part 42 and rear support part 43 at the third camp 26 via a connecting bolt 41 pivotally attached. At the opposite end are the front and rear support parts 42 respectively. 43 via an unlocking bolt 121 as an emergency actuation element of an emergency actuation device 12 detachable with the main bearing 2 connected.

On the front support part 42 is a drive motor 6 attached, in the embodiment shown via a gear 61 to convert the rotary motion of a motor shaft into a rotary motion of a gearwheel coupled to it 62 features. In the exemplary embodiment shown is the transmission 61 equipped as an worm gear with an additional gear pair for further translation. The gear 62 forms the output element of the drive device and is between the front support part 42 and the rear support part 43 of the engine mount 4 arranged. The gear 62 is in the locked state of the unlocking bolt 121 in engagement with a corresponding toothing of the gear segment 82 and forms an engagement area with it 83 ,

When the electric drive motor is actuated 6 becomes the gear 62 in turn drives and drives the gear segment 82 as well as the main link connected to it in a rotationally fixed manner 8th and thus ensures that the foldable top (not shown) is actuated.

A mirror-symmetrical to the drive device shown, second drive device is on the opposite Side of the vehicle body in the same longitudinal position.

In the event of a failure of the on-board electrical supply in the motor vehicle or in the event of a defect in the electric drive motor 6 or its transmission 61 depending on the translation in the gearbox 61 the hood can be opened or closed by hand if necessary. However, this is only the case with worm gear ratios if they are not self-locking, ie have a ratio of less than approximately 1:18 to 1:20. In the case of larger transmission ratios, such a worm gear transmission is generally self-locking, so that opening or closing the convertible top by hand is no longer possible, since the transmission is blocked in the process. Such self-locking worm gear ratios are also desirable for reasons of the actuating force available with them, since in this way smaller motors with higher nominal speeds can be used, which can nevertheless deliver an actuating torque required for heavy vehicle parts.

For manual actuation when the electric drive motor fails 6 or if the vehicle electrical system has failed or the transmission is defective 61 is made possible by the following 2 to 5 explains how the emergency actuation device according to the invention 12 is to use and works. The same parts as in 1 basically provided with the same reference numerals and some are not explained several times.

2 shows the arrangement according to the invention accordingly 1 with the release bolt removed from a locked position 121 that from an implementation 44 in the front support part 42 as well as in the rear carrier part 43 is pulled out, causing the motor mount 4 around the third camp 26 can be pivoted down.

This pivoting about a horizontal pivot axis 122 is based on the 3 clarified. With the engine mount swung down 4 becomes a mounting eye 23 recognizable, that in the inserted state of the unlocking bolt 121 with the bushings 44 in the engine mount 4 flees. With the engine mount swung down 4 (see. 4 ) is the gear 62 no longer with the toothing of the gear segment 82 engaged once the engine mount 4 by a certain minimum swivel angle α around the horizontal swivel axis 122 is pivoted down. The horizontal swivel axis 122 coincides with the axis of rotation of the third bearing 26 or with a central axis of the connecting bolt 41 together and is thus perpendicular to the plane of the drawing 4 ,

5 illustrates an alternative embodiment of the arrangement according to the invention, in which the motor mount 4 with the drive motor 6 and the gear 62 with the unlocking bolt removed 121 about a vertical pivot axis 123 can be pivoted outward by a pivot angle β, so that the toothing of the gear 62 and the gear segment 82 are no longer in engagement with each other. Here is the vertical swivel axis 123 perpendicular to the plane of the drawing 5 oriented.

The release bolts on each side of the vehicle body 121 can be accessible, for example, through an opening in the side interior lining of the motor vehicle which can be closed by a flap. So that the release bolts 121 are not lost when pulled out, they can be expediently connected to the vehicle body by means of a rope safety device or the like.

Further alternative configurations can provide that the unlocking bolt can be actuated by means of a cable. In this way, the described drive device according to the invention is also suitable for other pivotable or adjustable vehicle parts, such as, for example, a cover of a convertible top compartment or a trunk lid or the like. Another alternative embodiment is that the releasable emergency operating element or the unlocking bolt can be actuated hydraulically. In this embodiment, the hydraulic actuating force can preferably be provided by means of a pressure accumulator.

The transmission element can take place a gear segment which is pivotally mounted about a fixed bearing axis is also to be a rack that is essentially linearly movable is stored. Furthermore, you can friction pairings are generally used for transmission.

2

main bearing

21

attachment point

22

boom

23

fastening eye

24

first camp

25

second camp

26

third camp

4

engine support

41

connecting bolts

42

front support part

43

rear support part

44

execution

6

drive motor

61

transmission

62

gear

8th

main link

81

first wave

82

gear segment

83

engagement area

10

mainstay

101

second wave

102

connecting bolts

12

emergency control

121

unlocking

122

horizontal swivel axis

123

vertical swivel axis

α, β

swivel angle

Claims (13)

Drive device for an adjustable vehicle part with a drive motor ( 6 ), which is mounted on a swiveling motor support ( 4 ) is attached and with the motor mount ( 4 ) is adjustable between a drive position in which a driven element driven by rotation ( 62 ) of the drive motor ( 6 ) in drive engagement with a movably mounted transmission element ( 82 ) of the adjustable vehicle part ( 8th ), and an emergency operating position in which the output element ( 62 ) out of engagement with the transmission element ( 82 ), and with an emergency actuation device that has at least one emergency actuation element ( 121 ) which, in its releasably locked rest position, the drive motor ( 6 ) with the motor mount ( 4 ) in the drive position and that after it has been removed from its rest position, the drive motor swivels ( 6 ) with the motor mount ( 4 ) in the emergency actuation position. Drive device according to claim 1, characterized in that the motor mount ( 4 ) around a swivel axis ( 122 ; 123 ) is adjustable between its drive position and its emergency actuation position and these two positions include a fixed swivel angle (α or β). Drive device according to claim 1 or 2, characterized in that the drive device and the adjustable vehicle part ( 8th ) at a main warehouse ( 2 ) are stored, which is firmly connected to a vehicle body. Drive device according to one of claims 1 to 3, characterized in that the releasable emergency actuating element has an unlocking pin or bolt ( 121 ), a hook or a catch. Drive device according to one of claims 1 to 4, characterized in that the emergency actuating element can be released manually or is removable. Drive device according to one of claims 1 to 5, characterized in that the releasable emergency actuator can be actuated by means of a cable or hydraulically. Drive device according to one of claims 1 to 6, characterized in that the output element of the drive device is an electric drive motor ( 6 ) driven gear ( 62 ) is. Drive device according to one of claims 1 to 7, characterized in that the transmission element is a gear or a gear segment ( 82 ) or a rack. Drive device according to one of claims 1 to 8, characterized in that the motor mount ( 4 ) around a horizontal swivel axis ( 122 ) is mounted, which is essentially parallel to the axes of rotation of the output element ( 62 ) and the transmission element ( 82 ) is arranged. Drive device according to one of claims 1 to 8, characterized in that the motor mount ( 4 ) around a vertical swivel axis ( 123 ) which are essentially perpendicular to the axes of rotation of the output element ( 62 ) and the transmission element ( 82 ) is arranged. Drive device according to one of claims 1 to 10, characterized in that the Ab drive element ( 62 ) via a gearbox ( 61 ) with a shaft of the electric drive motor ( 6 ) is coupled. Drive device according to one of claims 1 to 11, characterized in that the transmission element ( 82 ) is pivotally mounted. Drive device according to one of claims 1 to 12, characterized in that the transmission element ( 82 ) rotatably with a main link ( 8th ) of the adjustable vehicle part or a foldable convertible top.