EP2325430A2 - Door drive for a swing door of a passenger vehicle - Google Patents

Abstract

The drive has a rotary column (10) provided with a rotary arm for arrangement of the column at a leaf. An electric motor (21) is arranged in the rotary column and stands in connection with the rotary column. Planetary gear stages (30, 30a, 30b) are provided for reduction of speed of the motor, where planet pinion cages (34, 34a, 34b) of the planetary gear stages include a rotary member (38) i.e. fixable pinion. The rotary column includes internal teeth (35) and a locking device (40) for fixing the rotary member and mounted in a door portal of a vehicle.

Description

The invention relates to a door drive for a swing door of a vehicle for passenger transport.

From the prior art, the most diverse types of swing doors are known. On the one hand pivot sliding doors are known in this context, the z. B. in the DE 37 42 279 C2 , of the DE 41 33 179 A1 , are described.

In addition, pure swing doors are known, in the prior art such swing doors are characterized in that these swing doors have, inter alia, a rotary column, wherein in the rotary column, a spindle drive is provided, which converts a lifting movement into a rotary motion. Here, a top plate is provided, wherein the top plate receives a drive cylinder, wherein the top plate is located above in the door portal and insofar the height of the door passage itself is limited. In this context, another door drive is known, which is also based on a spindle drive, wherein in this door drive to fix the door in the closed position, the door drive at the end of the closing movement performs a vertical movement, which ensures that the door in am Door portal arranged wedge-shaped locking elements enters.

The spindle drives described above are all pneumatically actuated via piston-cylinder drives, although an electric door drive is also known from the prior art, wherein such an electric door drive is arranged in the entry level of the vehicle. The arrangement of such a motor in the entry level naturally limits the entrance width of the door portal, which is particularly disadvantageous if, for example, in the area of such a door entry ramp for wheelchair users to be arranged.

In summary, it should therefore be noted that in door drives for swing doors of passenger transport vehicles, such. As buses, by the drive device, it is designed as a pneumatic or electric drive, always has an increased space requirement either in the ceiling or floor area of the portal result, which has limitations in the passage height or in the width of the passage opening result. From the DE 20 2007 015 770 U1 In this respect, a drive device for a door of a public transport vehicle with a rotary column drive is known, wherein both the drive motor and the transmission are accommodated in the rotary column. In addition, a brake is housed in the rotary column, wherein the brake engages under the action of the force of a spring in the blocking position. The release of the brake can be electromagnetically or mechanically, without being described in more detail.

The object underlying the invention is therefore to provide in a door drive arranged in the rotary column drive motor with downstream planetary gear in a simple way for unlocking so that in case of emergency, the door can be transferred by hand from the closed position to the open position.

This object is achieved by the features mentioned in claim 1.

To reduce the rotational movement of the electric motor in the rotary column at least one planetary gear stage is provided. By the at least one planetary gear stage takes place, as already stated, a reduction of the speed of the motor, with the result that in this case the torque increases. This ensures that relatively small motors can be used, in addition, depending on the number of planetary gear stages used and such self-locking of the door drive can be achieved that separate measures to prevent inadvertent opening of the door at z. B. vibrations while driving, can be avoided.

As already stated above, the planet carrier of the at least one planetary gear stage, a rotary member, in particular in the form of a pinion, which can be fixed. If the pinion is not fixed, it may Thus, the planet carrier of at least one planetary gear stage rotate freely. This means that the planets arranged on the planet carrier also rotate freely about the sun gear which is arranged on the drive shaft of the electric motor. In the area of the planets of the planetary gear stage, the rotary column is provided with an internal toothing. Now, if the rotary member, and in particular the pinion set, then naturally the rotational movement of the planet carrier is suppressed. This means that during operation of the engine, since the sun gear is blocked, thus the drive shaft of the motor is blocked, the rotary column itself is set in rotation via the connection of the motor housing with the inner jacket of the rotary column. By arranged on the rotary column, at least one arm, through which the rotary column is in communication with the door, then takes place a pivoting movement of the door leaf.

If the rotary member is not fixed, then the rotary column rotates freely, therefore, in case of emergency, the door leaf is to be transferred by hand from the closed position to the open position.

Specifically, a locking device is provided for fixing the rotary member, and in particular of the pinion. The locking device is provided in particular in the upper region of the door portal, wherein the locking device comprises in detail a pivotable about an axis pivoting lever which has a locking member which can be brought into engagement with the rotary member. In this case, the locking member in particular a toothing, when the rotary member is also formed as a pinion. In this respect, the locking member is arranged non-rotatably on the pivot lever.

For actuating the pivot lever, a lever arrangement is provided. The pivot lever is formed in the plan view in approximately U-shaped, wherein the pivot lever is pivotally mounted in the region of the end of its one leg by an axle in a housing, wherein in the region of the end of the other leg, the lever arrangement is arranged to bring the pivot lever with the locking member in or out of engagement with the rotary member. Here, the lever arrangement comprises an angled lever, which is also pivotally mounted in the housing. This angled lever is pivotally connected to a further lever, the so-called actuating lever, wherein upon actuation of this actuating lever by the angled lever of the pivot lever, as already stated, with the locking member arranged on it, in particular with a toothing in or out of engagement with the Rotary member, such as a pinion, can be brought. The operating lever is pivotally mounted in the housing. The housing for receiving the locking device is in this case, as already stated, arranged in the head region of the rotary column in the region of the mounting of the rotary column in the door portal. The operating lever itself protrudes from the housing and is therefore to be operated from the outside.

Fig. 1

zeigt schematisch einen Ausschnitt aus dem Türportal eines Fahrzeugs mit in dem Türportal einsitzender Drehsäule mit Schwenkarmen, an denen der Türflügel angelenkt ist;

Fig. 2

zeigt schematisch den Aufbau der Drehsäule, wobei in der Drehsäule sowohl der Motor angeordnet ist, als drei Getriebestufen, sowie sich anschließend ein Gehäuse mit der Arretiereinrichtung;

Fig. 3

zeigt die Arretiereinrichtung in einer Draufsicht in Eingriffsstellung;

Fig. 4

zeigt eine Darstellung gemäß Fig. 3, wobei die Arretiereinrichtung sich nicht in Eingriffsstellung befindet.

An embodiment of the invention will be described below by way of example with reference to the drawings.

Fig. 1

schematically shows a section of the door portal of a vehicle with in the door portal einitzender rotary column with pivot arms to which the door is hinged;

Fig. 2

shows schematically the structure of the rotary column, wherein in the rotary column, both the motor is arranged, as three gear stages, and then a housing with the locking device;

Fig. 3

shows the locking device in a plan view in the engaged position;

Fig. 4

shows a representation according to Fig. 3 , wherein the locking device is not in the engaged position.

In the presentation according to Fig. 1 is the door portal marked 1. In the door portal 1 is the designated 10 rotary column. The rotary column 10 has spaced apart from each other two pivot arms 12, through which the rotary column 10 is in communication with the door leaf 13. In addition, a guide arm 14 is arranged on the door leaf 13 in connection with the door portal 1. The rotary column 10 is rotatably mounted in the portal 1 at the lower end (arrow 15). At the upper end of the rotary column 10 is another bearing 16, whereby the rotary column 10 is also rotatably mounted in the door portal 1 at the upper end. As can be seen from the illustration according to Fig. 2 results, the rotary column 10, the electric motor 21. The electric motor 21 is connected via its housing fixed to the inner circumferential surface of the rotary column 10. Downstream of the motor 21 are three planetary gear stages 30, 30 a, 30 b, which provide for a reduction of the motor shaft 31. For this purpose, the motor shaft 31 has at the upper end a sun gear 32, wherein on the sun gear 32 at least three planet gears 33 mesh, which are held by the planet carrier 34. The rotary column 10 has inside of the planetary gears 33 an internal toothing 35 and thus acts as a ring gear, so that the planetary gears 33 mesh on the internal teeth 35. The further planetary stages 30, 30a, 30b provide for a further reduction of the rotational speed of the shaft 31. The structure of the two following planetary gear stages 30a, 30b is identical to the previously described planetary stage 30, which is why the reference numerals are the same except for the letters a and b, were chosen. From the planet carrier 34b is another sun gear 38, which is designed as a free rotary member. This rotary member 38 can be fixed by the locking member 39. The locking member 39 is part of a locking device 40, whose essential part is a pivot lever 41, wherein the pivot lever 41, the locking member 39 has. Upon pivoting of the pivot lever 41, the locking member 39, which in particular has a toothing, in engagement with the rotary member 38, which is in particular designed as a pinion brought. Will the rotary member 38 locked by the locking member 39, then the following planet carrier 34 b, 34 a, and 34 are blocked in their rotation. The consequence of this is that during operation of the motor 21, the motor shaft 31 is also held, so the motor 21 via its housing, the rotary column 10 is set in rotation and thus provides for pivoting of the door leaf 13.

If the locking member 39 is not in engagement with the rotary member 38, then the door leaf can be brought by hand in the open position. The formation of the locking device results in detail from the FIGS. 3 and 4 , The locking device 40 is located in a housing 50 which is arranged at the upper end of the rotary column on the portal 1. The designated pivot lever 41 is connected by an axis 43 with the housing 50 in a pivotal connection. The pivot lever 41 has the locking member 39, wherein the locking member 39 is seen in the present case with a toothing. The locking member 39 is engageable with the rotary member 38, which has the function of a sun gear, as in the view of Fig. 2 results. This sun gear or rotary member 38 is in rigid connection with the planet carrier 34b, so that when the locking member 39 is brought by the pivot lever 41 into engagement with the pinion 38, the pinion or rotary member 38 is held firmly, that is non-rotatable. For pivoting the pivot lever 41, an angle lever 48 is provided which is rotatably mounted on the pivot lever 41 by the axis 48 a. At the end of the angle lever 48 is the actuating lever 49 which is pivotally mounted in the housing 49a by the axis. It can be seen that upon pivoting of the actuating lever 49 in the direction of the arrow 60, the locking member 39 can be brought out of engagement with the pinion 38.

Claims (11)

Door drive for a swing door of a vehicle for passenger transport, comprising a rotary column (10) arranged on the vehicle with at least one pivot arm (12) for arrangement on a door leaf (13), wherein in the rotary column (10) a motor (21) is arranged at least one planetary gear stage (30, 30a, 30b) is provided, wherein the planet carrier (34, 34a, 34b) of the at least one planetary gear stage (30, 30a, 30b) a Rotary member (38), in particular a pinion, which can be fixed. Door drive according to claim 1,
characterized,
in that the vehicle has a door portal (1), wherein the rotary column (10) is mounted in the door portal (1). Door drive according to one of the preceding claims,
characterized,
that the motor (21) is designed as an electric motor. Door drive according to one of the preceding claims,
characterized,
in that the housing of the electric motor (21) is connected to the inner lateral surface of the rotary column (10). Door drive according to one of the preceding claims,
characterized,
that the rotary column (10) in the region of at least one planetary stage (30, 30a, 30b) having an inner toothing (35) for the planets (33, 33a, 33b) of the planetary stage (30, 30a, 30b). Door drive according to one of the preceding claims,
characterized,
that the rotary column (10) for fixing the rotary member (38), in particular of the pinion, a locking device (40). Door drive according to one of the preceding claims,
characterized,
in that the locking device (40) comprises a pivot lever (41) which is mounted rotatably about an axis (43) and has a locking member (39) which can be brought into engagement with the rotary member (38). Door drive according to one of the preceding claims,
characterized,
that the locking member (39) has a toothing. Door drive according to one of the preceding claims,
characterized,
that the pivot lever (41) is U-shaped in the plan view, wherein it is pivotally mounted in a housing (50) in the region of the end of the one leg by the axis (43), wherein in the region of the end of the other leg, a lever arrangement (48, 49) is provided to bring the pivot lever (41) with the locking member (39) in or out of engagement with the rotary member (38). Door drive according to one of the preceding claims,
characterized,
in that the housing (50) is arranged at the upper end of the rotary column (10) on the portal (1) of the door opening. Door drive according to one of the preceding claims,
characterized,
in that the lever arrangement comprises an actuating lever (49) which projects out of the housing (50) and in so far as the actuating lever (49) can fix the rotary member (38) from the outside.

Images