DE102008056680A1 - Swivel drive, particularly lower floor swivel drive for pivotable door wing of revolving gate, has rotary drive motor and gearbox between rotary drive motor and output shaft of swivel drive connected with door wing - Google Patents

Abstract

The swivel drive (2) has a rotary drive motor (12) and a gearbox (14) between the rotary drive motor and an output shaft of the swivel drive connected with the door wing. The gearbox comprises a spindle drive (28) with a spindle (30) driven by the rotary drive motor and with a spindle nut (32) linearly moving on the spindle, which is rigidly connected with a gear rack (36) of an output-side gear stage (34) of the gearbox. An independent claim is included for a method for transmission of a swiveling of an output shaft of a rotary drive motor for swiveling of a pivotable door wing of a revolving gate.

Description

The The invention relates to a pivot drive for a pivotable Gate of a swing gate according to the preamble of claims 1 and 19, a swing gate with such A rotary actuator according to claim 23, and a method for transmitting a rotation of an output shaft of a rotary drive motor one for pivoting a gate of a swing gate serving rotary actuator on a acting on the door leaf Output shaft of the rotary actuator according to the preamble of claim 27.

rotary actuators of the aforementioned type, which also called Drehtorantriebe are usually near a pivot bearing of the Gate leaf, being used both as an underfloor and overhead drive can be designed. In addition to one Serving as a rotary drive motor electric motor with reversible direction of rotation They usually include a reduction gear whose Output shaft acts on the door leaf to this depending on Direction of rotation of the drive motor from an open position into a To swing closed position or vice versa.

Around the pivoting movement of the gate in the desired To limit open position or closed position are off the prior art several alternatives known. At a first Alternatively, gate stops are provided against which the gate wing in its open or closed position strikes, whereupon the door drive is switched off. This shutdown can by means of a timer or force transducer, the Power supply to the drive motor interrupts.

at In a second alternative, the power supply to the rotary drive motor by two accommodated in a housing of the rotary actuator Limit switch interrupted by switching cams on the drive train of the rotary actuator are actuated and for adjustment a desired open or closed position of the gate in relation to a rotational axis of the drive train mounted in different angular positions in the housing can be.

If These drives via a two-armed toggle lever with the Door leaves are connected, this lever is in the opening or closed position often angled, which possibly to a destruction of the transmission or the drive motor or to an unwanted pivoting of the door leaf can result when the powered off by wind forces is loaded on the gate with a torsional force.

To avoid this, was in the DE 10 2004 001 771 A1 already proposed a pivot drive of the type mentioned, in which two instead of a passing with the gate engaging stop within a housing of the pivot drive serving to limit the pivoting of the door leaf in the open or closed position stops are provided. These attacks also take when turned off rotary drive motor, for example, by wind loads acting on the door leaf forces and prevent their transfer to the drive motor or to the transmission of the door drive. However, the rotary actuator is designed only for swing gates, in which the rotation of the output shaft of the transmission is transmitted via a hinge lever on the gate, but not for swing gates, where the output shaft is rotatably connected to the gate.

Further are quarter-turn actuators for gate leaves of swing gates known, the two hydraulic cylinders as drive and one with piston rods the two hydraulic cylinders connected linearly movable rack as part of a arranged between the drive and the gate Gear include whose output shaft rotatably connected to the gate is. These rotary actuators can transmit large forces, However, they have an elongated design and require an additional hydraulic circuit.

The Most known part-turn actuators have the disadvantage that the gate with switched off swivel drive while in the open position and blocked in the closed position is, but not in any pivot position between the Open position and the closed position or that such Blocking costly additional measures required power.

outgoing This is the object of the invention, a rotary actuator the type mentioned above to improve that he at very compact design and a small footprint the transmission allowed large forces and switched off Swivel drive in each pivot position between the open position and the closed position is blocked. Next should be the quarter-turn actuator without major modifications both as a floor and can be used as underfloor pivot drive whose output shaft over a toggle or rotatably connected to the gate is.

These The object is achieved according to the invention that the transmission has a spindle drive with one of the rotary drive motor driven spindle and a linearly movable on the spindle spindle nut comprising, with a rack of a driving the output shaft output side gear stage of the transmission is rigidly connected.

By the spindle drive is the rotation of an output shaft of the rotary drive motor converted into a linear movement of the rack, which in turn with the help of the output side gear stage in a rotation of the Output shaft is converted. This allows the transfer very much high torques in a very compact and space-saving Construction. In addition, it is self-locking only within the gearbox blocking the gate guaranteed in each pivot position.

Around the efficiency of power transmission within the transmission To keep as high as possible, is the spindle of the spindle drive preferably a ball screw. However, alternatively, too a spindle can be used with a trapezoidal thread through which the self-locking of the transmission is further improved.

Around the spindle nut of the spindle drive rigid with the rack too Connect, it is useful in a threaded hole a one-sided designed as a rack or with the rack provided screwed component and fixed in the threaded hole. Although a rotation of the spindle nut during her Linear movement already by the meshing between the rack and a gear of the output-side gear stage prevents however, an additional linear guide is preferred provided to also cause minimal rotation of the spindle nut to avoid the play between the rack and the gear.

Around to allow it, the pivoting movement of the gate without the need for external gate stops in the open position and to limit the closed position, the gearbox has advantageously an integrated stop mechanism. The stop mechanism preferably comprises two movable together with the spindle nut Stop surfaces in the open position or in the Closed position of the gate with two stops can be brought into engagement. For the purpose of adjusting the open or closed position are the stops in the longitudinal direction the spindle adjustable and are preferably on nuts formed parallel to the spindle threaded rod, which has a bore in a rigidly connected to the spindle nut, on opposite Passed sides with the stop surfaces provided stop element. This construction is very simple and allows for easy Adjustment of the attacks.

In order to the gate of the swing gate in case of interruption the power supply to the rotary actuator or other malfunction open or close is, according to a Another advantageous embodiment of the invention, an emergency release device provided between the rotary actuator and the gate.

When Rotary drive motor is preferably a DC motor with reversible Direction of rotation used, the spindle of the spindle drive via a Input-side gear stage in the form of a worm or planetary gear drives. Especially where the input-side gear stage as worm gear and preferably as an angle reducer flanged to the rotary drive motor is formed, is preferable for reducing the space requirement an additional bevel gear stage between the input side gear stage and the spindle drive provided.

There, where the pivot drive is designed as a top-floor pivot drive, its output shaft via a toggle lever with the gate is connectable, the output-side gear stage preferably comprises only one meshing with the rack gear, the rotation connected to the output shaft.

There, where the rotary actuator is designed as a underfloor pivot drive, whose output shaft rotatably connected to the door leaf however, the output-side gear stage preferably comprises at least one other gear or gear pair.

apart thereof is the pivot drive when used as underfloor or as Oberflur-Schwenkantrieb the same, but is in different Alignment mounted.

Underfloor part-turn actuators have traditionally been housed in a pot-shaped steel housing embedded in a concrete foundation. Since this case is not only used to prevent the penetration of concrete into the interior when concreting in the pivot drive, but also to the weight of the driven by the rotary actuator door leaf, acting on the door wind forces and the reaction forces occurring during pivoting of the door leaf in the underground derive the housing of underfloor actuators are designed as a stable weldments. However, for the production of such housing on the one hand relatively much steel and on the other a considerable amount of work required. A preferred embodiment of the invention and independent of the formation of the transmission for itself patentable invention therefore provides that the drive motor and the gearbox are suspended on a anchored by ground anchor in the ground support plate and surrounded by a thin-walled non-protruding pan, preferably made of plastic and also attached to the support plate.

Around the disassembly of the rotary actuator after embedding the ground anchor into a poured concrete foundation underground is easier the support plate expediently releasably attached to the Ground anchors attached to the pan with the pivot drive in Surrounded by a distance, so that during a transport of the Swivel drive can simultaneously serve as a transport lock.

in the Following is the invention with reference to two shown in the drawing Embodiments explained in more detail. Show it:

1 a perspective view of a surface-pivoting actuator for a gate of a swing gate;

2 : An enlarged perspective view of a motor / gear assembly of the rotary actuator;

3 FIG. 4 is an enlarged perspective view of the engine / transmission assembly when viewed from another direction; FIG.

4 a perspective view of an underfloor pivot drive for a gate of a swing gate with the same engine / transmission assembly;

5 : A perspective view of the underfloor pivot drive when viewed from another direction.

The part-turn actuators shown in the drawing 2 serve to pivot a gate of a swing gate between an open position and a closed position. It is in the 1 to 3 shown pivot drive 2 as an on a goalpost of the revolving gate (not shown) mountable overhead-pivot drive 2 formed, with the gate by a two-armed, engaging at a distance from its pivot axis articulated lever 4 is connectable while in the 4 and 5 shown pivot drive 2 as underfloor swivel drive 2 is formed, a rotatably connected to the gate (not shown) connectable, acting directly on the gate output shaft 6 has and can be mounted below the pivot axis of the door leaf in the ground.

In both cases, the part-turn actuators essentially have the same motor / gear assembly 8th designed to protect against weather from a housing 10 (only in 1 shown) is surrounded. How best in the 2 and 3 includes the engine / transmission assembly 8th an electric drive motor 12 , a multi-stage transmission 14 and one in the transmission 14 integrated, serving to limit the pivoting path or the pivot angle of the door leaf in the open position and in the closed position stop mechanism 16 ( 3 ).

In the electric rotary drive motor 12 It is a 24V DC reversible motor, which is arranged to be a motor housing 18 Exiting output shaft (not visible) is aligned horizontally.

On the rotary drive motor 12 is an angle reducer 20 Flanged, the one input-side gear stage of the multi-stage transmission 14 forms. The trained as worm gear angle reduction gear 20 is arranged so that its output shaft (not visible) is vertically aligned.

Next to the angle reducer 20 includes the gearbox 14 one from the output shaft of the angular reduction gear 20 driven bevel gear stage 22 with two intermeshing bevel gears 24 . 26 , one of the bevel gear stage 22 downstream spindle drive 28 with one from the drive motor 12 over the angle reducer 20 and the bevel gear stage 22 driven ball screw 30 and one on the ball screw 30 linearly movable spindle nut 32 , an output-side gear stage 34 with a rigid with the spindle nut 32 connected rack 36 and one with the rack 36 meshing gear 38 , as well as from the gear stage 34 driven output shaft 6 , The bevel gear stage 22 , the spindle drive 28 , the gear stage 34 and the output shaft 6 are together in a supporting frame 40 mounted over which the output shaft 6 survives.

The bevel gear stage 22 on the one hand serves to the axis of rotation of the output shaft of the rotary drive motor 12 and the axis of rotation of the ball screw 30 of the spindle drive 28 to reduce the footprint of the engine / transmission assembly 8th align parallel to each other and allows it on the other hand by changing the number of teeth of one or both bevel gears 24 . 26 the reduction ratio of the transmission 14 and thus to change the speed of movement of the gate during pivoting. From the two straight bevel gears 24 . 26 this is a rotationally fixed to the output shaft of the angular reduction gear 20 connected while the other rotatably with a front end of the ball screw 30 connected is.

The at their front ends in pivot bearings 42 . 44 of the supporting frame 40 rotatably mounted ball screw 30 of the spindle drive 28 extends in the We sentlichen over the entire length of the support frame 40 and is provided along its outer circumference with a ball screw external thread (not shown).

The spindle nut 32 of the spindle drive 28 is in an axial threaded bore of an elongated block-shaped metal block 46 screwed, whose one longitudinal side of the rack 36 is formed. The spindle nut 32 is fixed in the tapped hole so that it is inside the metal block 46 not in relation to the ball screw 30 can turn. A rotation of the metal block 46 around the longitudinal or rotational axis of the ball screw 30 is due to the tooth engagement between the rack 36 and the gear 38 prevented. However, since the meshing occurs with a certain amount of play, there is also a guide for the metal block 46 intended. The guide is made by a flat guide surface (not visible) of the support frame 40 and an opposite, to the axis of rotation of the ball screw 30 parallel planar guide surface of the metal block 46 formed on the guide surface of the support frame 40 slides and even a minimal rotation of the metal block 46 and the spindle nut housed by this 32 prevented.

The spindle nut 32 itself is on her the outer circumference of the ball screw 30 opposite inner circumference with a ball screw female thread (not visible), which with the ball screw external thread of the ball screw 30 limited a helical or helical ball circulation channel with an approximately circular cross-section. The ball circulation channel is filled with steel balls, on which the spindle nut 32 unrolls when it rotates the ball screw 30 moved along this, allowing a power transmission from the ball screw 30 on the spindle nut 32 and conversely with a very high efficiency of almost 95%. The spindle nut 32 further encloses an inner ball return passage, the ends of which at the ends of the ball screw internal thread of the spindle nut 32 communicate with the recirculating ball channel. During a movement of the spindle nut 32 along the ball screw 30 The balls are from the rear end of the spindle nut in the direction of movement 32 through the ball return channel to the front end of the spindle nut in the direction of movement 32 recycled.

There, where the rotary actuator as in the 1 to 3 illustrated overhead swing actuator via a toggle lever 4 connectable with the gate, includes the gear stage 34 only the rack 36 and that with the rack 36 meshing gear 38 acting as a unit with the output shaft 6 the drive motor / gear assembly 8th trained or rotationally fixed on the output shaft 6 is mounted. The output shaft 6 is there on both sides of the gear 38 in two pivot bearings 48 . 50 of the supporting frame 40 stored and is outside the support frame 40 with the help of a plug-in splined shaft connection 52 and a retaining screw 54 with an annular hub 56 connected to one end of one of the two lever arms 58 . 60 of the two-armed articulated lever 4 is formed.

The articulated lever 4 itself has a known structure and comprises a known emergency unlocking device 62 with, for example, a power failure or a defect in the engine / transmission assembly 8th by means of a suitable unlocking tool 64 a releasable locking in the area of the articulated arm 58 can be unlocked to allow pivoting of the blocked gate.

There, where the output shaft 6 of the rotary actuator 2 like the one in the 4 and 5 illustrated underfloor pivoting drive 2 acts directly on the gate and rotatably connected to this, includes the output side gear stage 34 next to the rack 36 and with the rack 36 meshing gear 38 another pair of meshing gears 66 . 68 of which one together with the gear 38 rotatably on one in the pivot bearings 48 . 50 stored intermediate shaft 70 is mounted and the other outside the support frame against rotation on the output shaft 6 is mounted. Through the further gear pair 66 . 68 can the reduction ratio of the multi-stage transmission 14 adapted to the greater torque, that of the non-rotatably connected to the door leaf output shaft 6 must be applied when pivoting the door leaf. In order to absorb the weight of the door leaf and the wind forces acting on the door leaf, the over the output shaft 6 into the engine / transmission assembly 8th are introduced, the latter is on a reinforced support plate 72 hung, one of the pivot bearings 73 the output shaft 6 includes.

The non-rotatable connection between the output shaft 6 and the gate is there in a conventional manner via a rail 74 made, which is bolted to the bottom of the gate and an emergency release mechanism 76 with a radial over the output shaft 6 protruding and non-rotatable with the output shaft 6 connected rail 78 is coupled. To the pivoting of a power failure or a defect of the rotary actuator 2 To allow blocked door leaves, a releasable lock between the two rails 74 . 78 in a conventional manner by means of a suitable unlocking tool 80 be unlocked.

The stop mechanism 16 consists essentially of a one-piece with the metal block 46 trained cuboid projection 82 that's over to the rack 36 opposite side of the metal block 46 protrudes and with a to the axis of rotation of the ball screw 30 parallel through hole 84 and two opposite lateral abutment surfaces 86 (only one visible) is provided. The hole 84 of the projection 82 is from one at the ends with the support frame 40 screwed threaded rod 88 interspersed, on both sides of the projection 82 one pair of nuts each 90 . 92 are screwed on. The lead 82 of the metal block 46 neighboring mother 90 from each nut pair 90 . 92 so on the threaded rod 88 positioned against the respective opposite stop surface 86 of the projection 82 is present when the door leaf is in the open position or in the closed position. The other mother 92 from each nut pair 90 . 92 forms a counter or lock nut, which is an unintentional adjustment of serving as a stop nut 90 prevented. To adjust the open position or the closed position of the gate is the counter or lock nut 92 of the associated nut pair 90 . 92 and then the stop nut 90 on the threaded rod 88 twisted by a corresponding amount.

The supporting frame 40 includes two elongated L-shaped elements 94 . 96 whose shorter legs to form an elongated U-shaped frame part 98 are screwed, as well as a short U-shaped frame part 100 which at the yoke of the frame part 98 opposite front end is screwed to this. The two pivot bearings 42 . 44 for the spindle 30 are in complementary openings in the yokes of the frame parts 98 . 100 used where they are held by snap rings while the pivot bearings 48 . 50 for the output shaft 6 ( 1 to 3 ) or for the intermediate shaft 70 ( 4 and 5 ) of snap rings in complementary openings of the longer legs of the L-shaped elements 94 . 96 being held.

Between the output shaft of the angle reducer 20 and the engine-side bevel gear 24 the bevel gear stage 22 An additional thrust bearing (not visible) can be used to transfer axial forces from the bevel gear 24 on the output shaft of the angle reducer 20 to prevent.

Where the rotary actuator 2 as underfloor swivel drive 2 is arranged in extension of the pivot axis of the gate below the surface of the ground, is the reinforced support plate 72 for suspending the motor / gear unit assembly 8th approximately flush with the surface of the substrate. The engine / transmission assembly 8th indicates there a reverse orientation as the engine / transmission assembly 8th in the 1 to 3 illustrated overhead-pivoting drive 2 on. That is, the drive motor 12 and the angle reducer 20 are there below the support frame 40 while they are in the overhead drive 2 above the support frame 40 are arranged.

Otherwise, the structure of the transmission 14 identical, apart from the output side gear stage 34 whose construction depends on the type of connection between the output shaft 6 and the gate, as previously described.

As in 4 and 5 shown are at the bottom of the support plate 72 of the underfloor swivel drive 2 three laterally spaced U-shaped ground anchors 102 releasably screwed. For this purpose, the two legs of each ground anchor 102 an angled upper end with a threaded hole in the top of a hexagon socket screw 104 through a hole in the support plate 72 is screwed through. To screw in the screws 104 To facilitate, are at the bottom of the support plate 72 screwed stops 106 for the angled upper ends of the legs of the ground anchors 102 intended.

The three parallel ground anchors 102 form during a transport of the rotary actuator 2 a transport lock, which the engine / transmission assembly 8th protects against knocks or bumps. For mounting, the ground anchors 102 together with the support plate 72 placed in a pit excavated in the ground, where they are parked with their horizontally oriented yokes on a previously leveled or concrete floor surface of the pit, whereupon a flowable concrete fill is introduced into the pit, which forms a concrete foundation after curing. but the concrete foundation will be over the output shaft 6 into the engine / transmission assembly 8th introduced forces, such as the weight of the door leaf or introduced into the gate wind forces also derived in the underground, as the pivoting of the gate of this wing on the engine / transmission assembly 8th exerted reaction forces. To prevent the concrete filling filling the entire pit is at the bottom of the support plate 72 a non-supporting thin-walled plastic tub (not shown) surrounding the motor / gear assembly 8, which may also serve as moisture protection. The tub is embedded in the concrete when placing the concrete fill in the pit, whereby adhesion of the concrete to the tub by a foil or fat layer can be prevented.

How best in 5 shown, the support plate 72 a rectangular inspection opening 108 on, which can be closed by a lid (not shown) moisture-proof. For major maintenance on the engine / transmission assembly 8th becomes the entire engine / transmission assembly 8th dismantled by the support plate 72 from the ground anchors 102 unscrewed and then together with the engine / transmission assembly 8th and the plastic tub is lifted out of the concrete foundation.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102004001771 A1 [0006]

Claims (27)

A pivot drive for a pivotable gate of a swing gate, comprising a rotary drive motor and a gearbox between the rotary drive motor and an output shaft of the pivot drive connectable to the gate, characterized in that the gearbox ( 14 ) a spindle drive ( 28 ) with one of the rotary drive motor ( 12 ) driven spindle ( 30 ) and with one on the spindle ( 30 ) linearly movable spindle nut ( 32 ) rigidly connected to a rack ( 36 ) an output-side gear stage ( 34 ) of the transmission ( 14 ) connected is. Rotary drive according to claim 1, characterized in that the output-side gear stage ( 34 ) one with the rack ( 36 ) meshing gear ( 38 ) rotatably connected to the output shaft ( 6 ) connected is. Rotary drive according to claim 1, characterized in that the output-side gear stage ( 34 ) one with the rack ( 36 ) meshing gear ( 38 ) and at least one other gear or gear pair ( 66 . 68 ), which is between the gear ( 38 ) and the output shaft ( 6 ) is arranged. Rotary actuator according to one of the preceding claims, characterized in that the output shaft ( 6 ) by a toggle lever ( 4 ) is connectable to the gate. Rotary actuator according to one of the preceding claims, characterized in that the output shaft ( 6 ) rotatably connected to the door leaf is connectable. Rotary actuator according to one of the preceding claims, characterized in that the pivoting drive ( 2 ) when used as an underfloor or as an overhead drive ( 2 ) apart from the output side gear stage ( 34 ) has the same construction but is oriented differently. Rotary actuator according to one of the preceding claims, characterized by a in the transmission ( 14 ) integrated stop mechanism ( 16 ) for limiting a pivoting movement of the gate in an open and a closed position. Rotary drive according to one of the preceding claims, characterized in that the stop mechanism ( 16 ) two together with the spindle nut ( 32 ) movable stop surfaces ( 86 ) and two adjustable stops ( 90 ), with which the abutment surfaces ( 86 ) can be in the open position or in the closed position of the gate in striking engagement. Rotary actuator according to claim 8, characterized in that the two stop surfaces ( 86 ) on opposite sides of a rigid with the spindle nut ( 32 ) connected stop element ( 82 ) are arranged. Rotary actuator according to claim 8 or 9, characterized in that the adjustable stops of nuts ( 90 ) on one to the spindle ( 30 ) parallel threaded rod ( 88 ) are formed. Rotary actuator according to one of the preceding claims, characterized in that the spindle of the spindle drive ( 28 ) a ball screw ( 30 ). Rotary actuator according to one of the preceding claims, characterized in that the spindle nut ( 32 ) of the spindle drive ( 28 ) into a threaded hole of one with the rack ( 36 ) or rigidly with the rack ( 36 ) connected component ( 46 ) is screwed. Rotary actuator according to one of the preceding claims, characterized in that the spindle nut ( 32 ) is guided linearly by a guide. Rotary actuator according to one of the preceding claims, characterized in that the rotary drive motor is a DC electric motor ( 12 ) with reversible direction of rotation. Rotary drive according to one of the preceding claims, characterized in that the transmission ( 14 ) between the rotary drive motor and the spindle drive an input-side worm gear stage ( 20 ). Rotary actuator according to one of the claims 1 to 15, characterized in that the transmission between the Rotary drive motor and the spindle drive an input-side planetary gear stage includes. Rotary drive according to one of the preceding claims, characterized in that the transmission ( 14 ) between the rotary drive motor ( 12 ) and the spindle drive ( 28 ) a bevel gear stage ( 22 ). Rotary actuator according to claim 17, characterized by a thrust bearing between the rotary drive motor ( 12 ) and the bevel gear stage ( 22 ). Underfloor swivel drive for a pivotable gate of a swing gate, with a Rotary drive motor and a transmission between the rotary drive motor and an output shaft of the pivot drive connected to the gate, in particular according to one of the preceding claims, characterized in that the rotary drive motor ( 12 ) and the transmission ( 14 ) at one by ground anchors ( 102 ) anchored in the subsurface support plate ( 72 ) and below the support plate ( 72 ) are surrounded by a non-supporting trough-shaped housing. Underfloor pivoting drive according to claim 19, characterized in that the support plate ( 72 ) releasably attached to the ground anchors ( 102 ) is attached. Underfloor pivoting drive according to claim 19 or 20, characterized in that the trough on the support plate ( 72 ) is attached. Underfloor pivoting drive according to one of the claims 19 to 21, characterized in that the tub made of plastic consists. Underfloor pivoting drive according to one of claims 19 to 22, characterized in that the ground anchors ( 102 ) are generally U-shaped and surround the outside of the pan at a distance. Swing gate, characterized by a swivel drive according to any one of the preceding claims. Swing gate according to claim 24, characterized in that the pan and the ground anchors ( 102 ) are embedded in a concrete foundation. Swing gate according to claim 24, characterized by a between the pivot drive ( 2 ) and the door leaf emergency release device ( 62 . 76 ). Method for transmitting a rotation of an output shaft of a rotary drive motor of a pivoting drive serving for pivoting a door leaf of a swing gate on an output shaft of the pivot drive acting on the gate leaf, characterized in that the rotation of the output shaft by a spindle drive ( 28 ) one between the output shaft and the output shaft ( 6 ) arranged gear ( 14 ) in a linear movement of a rack ( 36 ) and that the linear movement of the rack ( 36 ) via an output-side gear stage ( 34 ) of the transmission ( 14 ) in a rotation of the output shaft ( 6 ) is converted.