DE102013009921A1 - Door drive for swinging-sliding door of e.g. omnibus, has lever assembly including two mutually articulated lever elements which are moved by drive device for securing door leaf in closed position into dead center or beyond dead center - Google Patents

Abstract

The door drive has a drive mechanism that moves a door leaf of swinging-sliding door between closed and open positions. A locking device (46) locks the door leaf in closed position. The locking device has a lever assembly (48) that includes two mutually articulated lever elements (50,52) which are moved by drive device (44) for securing the door leaf in closed position into a dead center or beyond dead center. The drive device includes a rack gear which is engaged with gear wheel.

Description

The invention relates to a door drive for a sliding door of a vehicle, in particular a bus, specified in the preamble of claim 1. Art.

From the prior art, especially of buses, such door drives are already known, which usually include a drive mechanism by means of which at least one door of the sliding door sliding between a closed position and an open position to shift. Preferably, by means of the drive mechanism, two door leaves of the sliding sliding door are to be displaced between a respective closed position and a respective open position. Such a door is usually referred to as a door leaf. Thus, the respective door is kept secured in its closed position, a locking device is provided.

So revealed the DE 29 30 250 C2 already such a locking device for locking a swing door leaf, which there includes a Hubverriegelung. In other words, there are mounted on the door frame of the sliding door sliding noses, which engage over the lugs attached to the door. As a result, the secure positioning of the door leaf is achieved in the closed position. To open the door leaf must be raised accordingly, so that the respective noses are disengaged. Due to the lifting movement, however, there is a delay when opening or closing the door.

From the DE 100 14 346 C1 In addition, a safety device is known to be known, which is actuated on the basis of compressed air. In other words, the respective door leaf is mechanically secured in its closed position by this compressed air safety.

Another mechanical protection via a swivel gear with controlled push rods is also the DE 197 35 181 C2 refer to. A mechanical tumbler over controlled by a swivel gear push rods is only suitable for the individual case in which a vertically arranged motor / gear unit is present, which can be extended. Furthermore, this solution is costly.

Object of the present invention is to provide a door drive for a sliding door of the type mentioned, by means of which the door is to hold in a simple and safe way in its closed position.

This object is achieved by a door drive with the features of claim 1. Advantageous embodiments with expedient and non-trivial developments of the invention are specified in the remaining claims.

In order to create a door drive, by means of which the door leaf is to be held in its closed position in a simple and particularly secure manner, it is provided according to the invention that the locking device holding the door leaf in its closed position comprises a lever arrangement with at least two lever elements connected to one another in an articulated manner Securing the door leaf in its closed position in a dead center position or over-center position by means of a drive device are movable. The drive device comprises a gear and a toothed rack meshing with the gear. The lever arrangement or the lever elements are thus movable over the gear and the rack. By means of the gear and the corresponding rack comprehensive drive means, it is also possible to secure the lever assembly in its dead center position or over-center position. This can be avoided that the lever assembly can move from its dead center or over-center position, for example, by vibrations of the vehicle.

By using the gear and the rack, the number of parts and thus the weight and the cost of the door drive can be kept very low. In addition, the drive device allows a particularly fast movement of the lever assembly from the dead center or over-center position in a different position and back, so that the door can be particularly quickly locked or released in a particularly short time and thus moved between its open position and its closed position , In addition, by means of the drive means a particularly efficient movement of the lever assembly can be displayed, so that the movement of the door leaf can be realized with only a very small amount of energy.

Further advantages, features and details of the invention will become apparent from the following description of a preferred embodiment and from the drawings; these show in:

1 a schematic front view of a sliding door for a vehicle in the form of a bus, with a door and with a door drive for moving the door leaf, wherein the door drive a locking device according to a first embodiment comprising a lever arrangement for securing the door leaf in its closed position and wherein for moving the lever arrangement, a drive means is provided with a gear and a toothed rack engaging with the gear;

2 a schematic perspective view of a support for moving the door leaf between its closed position and its open position;

3 a schematic perspective view of a base on which the carrier is slidably supported relative to the base;

4 a schematic plan view of the locking device and the drive device, wherein the door is in its closed position;

5 a schematic plan view of the locking device and the drive device according to 4 with the door in its open position;

6 a schematic side view of the locking device according to a second embodiment; and

7 a further schematic side view of the locking device according to the second embodiment.

1 shows a schematic front view of a sliding door pivot 10 for a vehicle in the form of a bus. The sliding door 10 includes a door, which as a door leaf 12 referred to as. The door leaf 12 is between a in 1 shown and a closing a corresponding door opening closed position and the door opening at least partially releasing the open position by means of a drive mechanism 14 a door drive movable. Around the door leaf 12 to move from the closed position to the open position, it is first pivoted outward in the vehicle transverse direction, which is referred to as issuing. For this purpose is a turning column 16 provided, which is pivotable about a pivot axis extending in the vehicle vertical direction. With the rotary column 16 are respective release lever 18 rotatably connected, which during pivoting of the rotary column 16 be mitverschwenkt. The one with the rotary column 16 rotationally connected release lever 18 On the other hand, at least indirectly with the door leaf 12 coupled. Now the turning column 16 pivoted about its pivot axis, so it is the door leaf 12 issued.

After that, the door leaf is turned 12 by means of the drive mechanism 14 at least substantially translationally displaced in the vehicle longitudinal direction. Around the door leaf 12 move from its open position to its closed position, the door leaf 12 initially translated translationally in the vehicle longitudinal direction and then subsequently by pivoting the rotary column 16 and the release lever 18 pivoted inward in the vehicle transverse direction and thus moved into the door opening or in the direction of this, wherein the door leaf 12 - As will be explained below - at least partially performs a translational movement, in particular displacement.

Out 2 is an aggregate carrier 20 the drive mechanism 14 recognizable. This includes guide elements in the form of guide axes 22 and a support arm 24 who is at the leading axes 22 and displaceable relative thereto in a first direction. In other words, the support arm 24 along the guide axes 22 be moved in the first direction, wherein the first direction extends at least substantially parallel to the vehicle longitudinal direction. The support arm 24 also includes a mounting plate 26 on which the door leaf 12 to attach or attached. This may cause the door leaf 12 when moving the support arm 24 along the guide axes 22 move with it. As a result, a linear movement can be displayed, so that the door leaf 12 - As described above - can be moved in the vehicle longitudinal direction.

To effect this linear motion is an in 1 and 2 unrecognizable engine provided in the form of an electric motor, by means of which a spindle 27 of the subframe 20 can be driven about an axis of rotation. The support arm 24 has a spindle nut 28 on which with the spindle 27 is engaged. By means of the spindle 27 and the spindle nut 28 can be caused by the electric motor, rotational movement of the spindle 27 in a translatory movement of the support arm 24 be converted, so that the previously described linear movement is effected.

The door drive also includes one 3 recognizable substructure 30 , The substructure 30 includes a guide plate 32 and two on the guide plate 32 fixed guide axes 34 , The aggregate carrier 20 has bearing elements in the form of bearing shapes 36 on, which at least indirectly fixed to the guide axes 22 are connected. The aggregate carrier 20 is about the bearing forms 36 at the leading axes 34 stored, wherein the subframe 20 overall relative to the substructure 30 along the guide axes 34 is displaceable in a second direction. This second direction is oblique or preferably perpendicular to the first direction, wherein the second direction extends at least substantially in the vehicle transverse direction. The aggregate carrier 20 and thus the door leaf 12 can thus in the vehicle transverse direction relative to the substructure 30 be moved, causing the above translational displacement of the door leaf 12 can be realized in the vehicle transverse direction.

On one of the substructure 30 facing bottom of the support arm 24 is an in 2 unrecognizable guide element mounted in the form of a bolt with a roller, which in a slotted guide 38 of the guide plate 32 intervenes. Through the slide tour 38 is shown a guideway along which the bolt with the roller and thus the support arm 24 guided is movable. The scenery tour 38 has a first length range 40 and an adjoining, second length range 42 on. How out 3 is recognizable, runs the first length range 40 at least substantially straight and thus parallel to the vehicle longitudinal direction, while the second length ranges 42 curved or arcuate runs and thus at least partially oblique or perpendicular to the vehicle longitudinal direction.

Will now be the arm 24 relative to the substructure 30 moved in the first direction and thus in the vehicle longitudinal direction, so acts due to the curvature of the slotted guide 38 a lateral force on the support arm 24 and on the subframe 20 all in all. As a result, the subframe 20 and with this the door leaf 12 moved in the vehicle transverse direction. In order to relieve the electric motor, the movement in the vehicle transverse direction by a 4 and 5 recognizable drive device 44 supported by the door drive, as will be explained below.

Around the door leaf 12 To keep in its closed position in a simple and safe way is one off 4 and 5 recognizable locking device 46 intended. The locking device 46 includes a lever arrangement 48 with a first lever element 50 and with a second lever element 52 , wherein the lever elements 50 . 52 are hinged together. On the one hand with the first lever element 50 coupled, second lever element 52 on the other hand is articulated with the release lever 18 coupled, wherein the in 4 and 5 recognizable deployment lever 18 around the vehicle in the vertical direction of the upper lever of the swing door 10 is. The lever elements 50 . 52 are there to secure the door leaf 12 in its closed position in one 4 detectable dead center position movable. Around the door leaf 12 can hold particularly safe in its closed position, it can be provided that the lever assembly 48 also in an over-center position is movable. Thus, it can be ensured that the door leaf 12 is kept particularly secure in its closed position even when wear of the door drive occurs.

The drive device 44 acts as an actuator to move the lever assembly 48 between their dead center position or over-center position and one of them different, from 5 recognizable release position, in which the door leaf 12 is in its open position. The drive device 44 includes a cylinder 54 , which is designed as a pneumatic cylinder. In the cylinder 54 a piston is arranged which is relative to the cylinder 54 is translationally movable. With the piston is a piston rod 56 the drive device 44 connected so that the piston rod 56 with the piston relative to the cylinder 54 is mitbewegbar. The drive device 44 also includes one with the piston rod 56 connected rack 58 and a gear rotatable about a rotation axis 60 which with the rack 58 is engaged. To the lever arrangement 48 to move from its dead center position, the piston rod 56 extended, which in conjunction with 5 is recognizable. This will be the gear 60 turned around its axis of rotation. The first lever element 50 is with the gear 60 rotatably coupled and thus about the axis of rotation of the gear 60 with a rotation of this pivotable.

This rotationally fixed coupling of the first lever member 50 with the gear 60 takes place for example via a shaft with which the gear 60 and the first lever element 50 are rotatably connected. How out 4 and 5 can be seen, the drive device serves 44 also for pivoting the release lever 18 so that the door leaf 12 , which at an attachment point 62 with the release lever 18 is coupled, for example when closing the door panel 12 is pulled into the door opening. This is the release lever 18 swiveled by 86 °.

In addition, a connecting element in the form of a connecting rod 64 intended. The connecting rod 64 is on the one hand articulated with the release lever 18 and on the other hand hinged to the subframe 20 coupled. This is a direct connection of the release lever 18 and the subframe 20 created, so that when using the drive device 44 caused pivoting of the release lever 18 also the translatory movement of the subframe 20 along the guide axes 34 is effected. In other words, the subframe becomes 20 along the guide axis 34 for example, when closing the door panel 12 pressed into the door opening. At the same time the release lever 18 pivoted so that the door leaf 12 is pulled into the door opening. After a rotary movement of the release lever by 86 ° and a transverse movement of the subframe 20 that's 80 millimeters door leaf 12 optically closed. The piston and thus the piston rod 56 However, they have only completed 50 millimeters of their total 70 millimeters long stroke. For the remaining 20 millimeters there is no movement of the door leaf 12 to recognize more, but the lever elements 50 . 52 be by means of the drive device 44 moved even further into their dead center position.

In the open position of the door leaf 12 Although not dead center and no Übertotpunktlage the lever assembly 48 intended. Nevertheless, due to the direct connection of the release lever 18 with the subframe 20 a particularly high stability of the open position can be realized. Thus, in a simple and cost effective way, a security of the door panel 12 be created both in its closed position and in its open position. To move the lever assembly 48 from their dead center position into their different position according to 5 becomes the gear 60 for example, by 90 ° relative to the respective image plane of 4 and 5 turned counterclockwise.

6 and 7 show a second embodiment of the door drive, this second embodiment of the first embodiment, in particular with regard to the lever assembly 48 or the locking device 46 different.

How out 6 and 7 can be seen, the door drive comprises a plate 66 where the in 6 and 7 With 68 designated wave relative to the plate 66 is rotatably mounted. To collisions of the second lever element 52 with the connecting rod 64 and / or with a connection point at which the connecting rod 64 with the release lever 18 is connected to avoid, has the second lever element 52 at least to a portion of a curved course, whereby a recess 67 is realized.

How out 7 is recognizable, is at the plate 66 a first stop element 70 intended. The lever arrangement 48 is - like out 6 is recognizable - in the closed position of the door leaf 12 in support system with the stop element 70 , By the stop element 70 is the movement of the lever assembly 48 limited, so that they do not move undesirably during the movement of the door panel from the open position to the closed position. For this purpose leaves the stop element 70 a movement of the lever elements 50 . 52 only in their dead center position or in their over-center position, but not further.

At the plate 66 is also a second stop element 72 provided on which the lever arrangement 48 , in particular the lever element 50 , in the open position of the door leaf 12 is applied. By means of the second stop element 72 is the movement of the lever assembly 48 during the movement of the door leaf 12 limited from the closed position to the open position, so that the lever assembly 48 when opening the door leaf 12 not undesirably far moved and, for example, such umfalls that the door drive jammed and the movement of the door panel 12 is no longer possible. Like from a synopsis of 6 With 7 recognizable, the gear becomes 60 in the second embodiment, in the movement of the door panel 12 from the closed position into the open position by less than 90 °, for example, rotated by 80 °.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2930250 C2 [0003]
• DE 10014346 C1 [0004]
• DE 19735181 C2 [0005]

Claims (4)

Door drive for a sliding sliding door ( 10 ) of a vehicle, in particular an omnibus, with at least one drive mechanism ( 14 ), by means of which at least one door ( 12 ) of the sliding door ( 10 ) is movable between a closed position and an open position, and with a locking device ( 46 ), by means of which the door ( 12 ) is held in its closed position, characterized in that the locking device ( 46 ) a lever arrangement ( 48 ) with at least two articulated lever elements ( 50 . 52 ), which for securing the door leaf ( 12 ) in its closed position in a dead center position or over-center position by means of a drive device ( 44 ) are movable, which at least one gear ( 60 ) and an engaged with this rack ( 58 ). Door drive according to claim 1, characterized in that the drive device ( 44 ) a shaft rotatable about a rotation axis ( 68 ), with which the gear ( 60 ) and one of the lever element ( 50 . 52 ) are coupled non-rotatably. Door drive according to one of claims 1 or 2, characterized in that one of the lever elements ( 50 . 52 ) with a release lever ( 18 ) for pivoting the door leaf ( 18 ) is articulated coupled. Door drive according to claim 3, characterized in that the door drive at least one base ( 30 ) and at least one corresponding, at the base ( 30 ) relative to this carrier displaceably mounted in a first direction ( 20 ) with at least one guide element ( 22 ) and one with the door ( 12 ) to be connected to the support arm ( 24 ), which for moving the door leaf ( 12 ) along the guide element ( 22 ) is displaceable relative to this in a direction obliquely or perpendicular to the first direction, second direction, at least one on the one hand hinged to the release lever ( 18 ) and on the other hand hinged to the carrier ( 20 ) coupled connecting rod ( 64 ) on which the carrier ( 20 ) relative to the base ( 30 ) and relative to the release lever ( 18 ) at a via the lever arrangement ( 48 ) caused pivoting of the release lever ( 18 ) is displaceable in the second direction.

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