DE102006012750A1 - Door operating device, in particular for a revolving door - Google Patents

Abstract

Door actuating device (1), in particular for a revolving door, with a drive unit (10) which can be coupled to a door and is arranged in a housing (11), further comprising a spring force accumulator (12) in which at least the one for executing the closing movement of the The energy required for the door can be stored and which has at least one compression spring (13) arranged under a spring preload, the spring adjustment (15) carried out by means of a threaded spindle (17) being adjustable and a fluid system also being provided which has a pressure compensation unit (32). The pressure compensation unit (32) forms a support sleeve (16) which comprises at least one cylinder (33) and a closure element (36) which is designed to accommodate the spring adjustment (15), and the threaded spindle (17) is axially and rotatably arranged on the support sleeve (16) and the spring force accumulator (12) and the pressure balance ichseinheit (32) are designed as an individually preassembled unit. This creates a door actuation device (1) with a pressure compensation unit (32) which takes up a small installation space and has a simple construction.

Description

The Invention relates to door actuation device, especially for a revolving door, with a drive unit which can be coupled to a door and in one casing is arranged, further comprising a spring force accumulator, in which at least for the execution the closing movement the door required energy can be stored and which at least one having under a spring bias arranged compression spring, wherein by means of a threaded spindle with a spring adjustment is adjustable, and further provided a fluid system is, which comprises a pressure compensation unit.

such Door actuators which also as door drives or door closer referred to are well known. To distinguish in particular Door operators which an electro-hydraulic unit to also open the Door over the Door actuator to enable whereas devices without an electrohydraulic drive only the kinematics of the door closing movement Taxes. In any case, fluid systems are in the door actuators provided, which usually comprise a hydraulic oil in the device arranged piston applied, which in a mechanical manner with the Drive unit are connected and the opening and / or closing movement and kinematics of the revolving door influence.

When opening the Revolving door over one electro-hydraulic drive is generated by this an oil pressure, which via oil lines, the common in the case are themselves integrated, in at least one pressure chamber passes. On a piston adjacent to the pressure chamber thus acts a force, which Piston and thus the drive unit set in motion to the Open the door. at the closing movement The piston is returned by the door movement moved back, and the pressure oil flows back out of the pressure chamber and gets back into the electro-hydraulic unit or in opening volumes, which, for example on the back are present on the piston.

In the door operators are moreover Spring energy storage device available, which for the closing movement the door store required energy in the form of mechanical work. The Storage of the mechanical work by means of at least one Compression spring, which during the opening movement the door is tensioned so that the closing movement of the door over a Relaxation of the compression spring takes place. The return of the pressure oil from the Pressure chambers is also stored by means of the spring energy storage Energy causes. The devices can either in the door frame used or even in the door leaf be integrated yourself. When using the devices in fire doors minimum closing moments of Reached doors be dependent on these of the width and weight of the doors are. There are specifications to comply with, for example, the availability of a mechanically stored energy in the door operators affect, so a fire door even during a power failure and thus a failure of a possible Control of the door operating device an automatic Shut down the door performs.

The EP 0 756 663 B1 discloses a door closer with a spring force adjustment, which comprises an adjusting sleeve and is formed so that in its inner region a cavity is present, wherein this further comprises a collar on which the compression spring can be supported by a support disk. In the region of the collar, a breakthrough is formed, which makes a correspondingly designed a driver geometric shape for positive connection between the driver and the adjusting possible. In this case, the driver dives according to the direction of movement through the opening in the cavity of the adjusting sleeve. At the same time, however, the driver is surrounded by the pressure spring, so that in the interior of the compression spring of the driver is placed. In order to change the spring force adjustment in the installed state, the driver is within a cap, which is arranged end in the housing of the door closing device, placed over a seal and for securing via a lock washer. The protruding from the cap end of the driver is accessible with a corresponding tool to initiate a rotational movement in the driver. Upon rotation of the spring adjustment up to the stop of a locking washer, which is arranged on an adjusting screw, it can lead to Verkontern, which is not controllable by an operator on the outside of the housing adjusting screw and may not be solved again. The operation of the spring adjustment is only possible via the adjusting screw, which end is arranged on the longitudinally formed housing of the door operating device. When setting up an electro-hydraulic actuator, an end-to-end operation of the spring adjustment is not possible since the electro-hydraulic unit is arranged on this end side on the housing.

From the DE 32 24 300 C2 a door closer with an adjustable closing force is known. This has at least one arranged in the closer housing, with one end supported on an adjustable plate compression spring and operable from outside the housing means for Tellerver position. The plate is arranged on a rotatably mounted drivable threaded spindle, wherein the arranged on a threaded spindle spring plate is driven by a worm gear. The worm gear takes a considerable amount of space, since a tangentially arranged to the worm drive screw can not be integrated in a small space. Furthermore, this solution of a spring adjustment on a fixed stop, which can lead to Verkontern. In addition, the spring plate must be guided axially in order to avoid co-rotation of the spring plate with the threaded spindle.

at The prior art therefore has the problem that the designs take up a considerable amount of space for spring adjustment, so that a narrow-building execution a door operator not possible is to integrate them preferably in a door leaf or generally in a place where only a very limited Space is available. Furthermore, there is the problem that in the adjustment of Spring over an axially moved and in addition rotating adjusting a stop is approached, in which it can come to a Verkontern of the adjusting element with the stop. Furthermore you can in the case Be provided stop edges, which are formed as diameter steps in the housing are. These require a considerable manufacturing effort, wherein a stop in the compression direction of the compression spring is inevitable, an overload to avoid the compression spring. Often are spring adjustments provided by an operating element be adjusted, which end of the longitudinally formed housing the Device can be operated by means of a tool. In the arrangement an electro-hydraulic unit, which preferably at the end side of the housing is a simultaneous arrangement of the controls of the Spring adjustment not possible. For that, the Operating elements of the spring adjustment are led out laterally on the housing, which mostly only about very space-consuming worm gears is possible.

The Door actuator can continue to be provided with an electro-hydraulic drive unit being, being by a pressurized oil pressure chambers are acted upon in the housing to adjust the device arranged axially movable piston so that the drive unit for actuating the revolving door is operable. These electro-hydraulic drives are used in particular for the execution of the opening movement the revolving door, wherein at the same time the compression spring of the spring force accumulator hydraulically tensioned becomes a subsequent one closing movement solely by the energy stored in the spring accumulator perform. Often Be the ones in the cases the devices axially movable piston reciprocally with pressure charged, the oil over oil passages, which preferably in the housing themselves are introduced. Anyway, for a closed System requires a pressure compensation unit, as with a temperature rise the door operator due to the expansion of the oil the oil pressure can increase sharply in the closed fluid system of the device. Dependent on From the occurring temperature oil pressures can arise, which even a damage of the housing can cause. Pressure compensation units have a volume storage, which provides volume compliance, so that the volume memory when expanding the oil can reduce to avoid the pressure increases mentioned above.

From the DE 34 11 189 C2 an automatic door closer with a can be coupled with a door closer shaft is known, which is rotatable from a closed position in both directions and within the housing with a Hubkurvenscheibe form-fitting between rollers a longitudinally movable carriage on which a memory forming a spring arrangement and the piston of a Attack hydraulic damping device and the interior of the door closer housing is divided into two separated by the piston pressure medium spaces through separate channels, each with a closable throttle valve to flow out of the pressure medium from the shrinking when closing the door pressure chamber and a piston disposed in the opening movement the door leaf also opening check valve are connected to each other, the separate channels are alternately lockable and releasable by a piston displaceable by the spool, and in each Channel a pressure medium spaces, if necessary, connecting safety valve is connected, wherein the stroke position of the spool is adjustable with respect to the piston. In this case, the piston rod has a cavity serving as a storage cylinder, in which a pressure compensation piston is arranged, which is in the direction of the cavity of the piston under load of a compression spring. By means of this pressure compensation device, it is possible on the one hand to store pressure medium and, on the other hand, to keep this pressure medium in the pressure medium space having the pressure spring within certain limits. However, this embodiment of a pressure fluid reservoir requires a specially shaped and open end piston or a corresponding piston rod, so that this design of a pressure accumulator can not be used for other versions of the door actuator. In this case, external pressure compensation units are needed, which require as individual components increased assembly costs and corresponding space requirements.

It Therefore, the object of the present invention is a door operating device with a spring adjustment and with a pressure compensation unit to create, which takes up a small space and a simple Construction has.

These The object is based on a door operating device according to the preamble of Claim 1 solved in conjunction with its characterizing features. advantageous Further developments of the present invention are specified in the dependent claims.

The Invention includes the technical teaching that the pressure compensation unit forms a support sleeve, which comprises at least one cylinder and a closure element, which is designed to receive the spring adjustment, and wherein the threaded spindle axially and ver arranged non-rotatably on the support sleeve is, and the spring energy accumulator and the pressure compensation unit as a single pre-assembled unit are executed.

These solution offers the advantage that a spring adjustment with an integrated Pressure equalization unit is created, which has a small space occupies, and due to the arranged on the support sleeve, fixed Threaded spindle and around this rotating Federverstellmutter or the spring adjustment sleeve makes an adjustment of the spring preload possible. This takes the Support sleeve the Function of receiving the spring adjustment in the housing true, and also serves as a pressure compensation unit, since the support sleeve with a corresponding volume memory is formed. This advantageous Development of the invention offers a high integration density, because components of the spring adjustment at the same time the components of a Form pressure equalization unit.

advantageously, the support sleeve comprises a Cylinder in which a piston is received axially movable, wherein the support sleeve continues a closure element to a pressure equalization chamber to form. The pressure compensation chamber serves as a volume storage, wherein the chamber is formed from the interior of the cylinder, which is limited on the one hand by the closure element and on the other is completed by the axially movable piston. Expands now the oil in the closed system of the door operator out, so the piston moves axially into the cylinder, so that the volume decreases. Does the oil retract? together, the piston moves axially back out of the cylinder, and increase that Volume of the pressure compensation chamber. The pressure compensation chamber is formed pressure-tight due to an all-round seal, so that during a movement of the piston into the cylinder through the resulting compression an increase in the internal pressure of the pressure compensation chamber he follows. This is usually filled with air, so that the air is compressed becomes. In addition, there is a compression spring between the closure element and the piston, which is also compressed, and the piston with a decrease in the pressure of the oil in the device, the volume in the cylinder again increase can, because the compression spring pushes the piston out of the cylinder again. The piston is dynamically pressure-tight by means of at least one sealing element sealed against the inner wall of the cylinder, wherein the sealing elements preferably formed from two lip seals.

advantageously, the closure element is disk-shaped and comprises an external thread, by means of which it can be screwed end into the cylinder of the support sleeve is. On the outside, In the closure element depressions are formed to this means screw a screwing end of the cylinder in the support sleeve. advantageously, the cylinder comprises the support sleeve on the the closure element facing away from an inner collar to a Stop for the To create pistons. Overall, therefore, a spring adjustment with created a pressure compensation unit, which a small space occupies, and due to the arranged on the support sleeve, fixed Threaded spindle and around this rotating Federverstellmutter or the spring adjustment sleeve makes an adjustment of the spring preload possible. This is by means of an adjustment mechanism in the longitudinal direction on the side of the housing operable. The spring adjustment includes a housing-fixed support sleeve, wherein the support sleeve both longitudinal the device and arranged in the rotational direction stationary to the housing is, for example, having an external thread which in an internal thread in the housing is screwed.

At the pressure spring-side end face of the cylindrical support sleeve, a threaded spindle is arranged, which is fixed both in the longitudinal direction and in the direction of rotation. On the fixed threaded spindle a Federverstellmutter is screwed with an internal thread, wherein the adjusting nut is adjustable due to rotation on the thread of the threaded spindle in the axial direction. The Federverstellmutter has a spring plate on which the compression spring rests end. Thus, due to a rotational movement of the Federverstellmutter the bias of the compression spring can be increased by the Federverstellmutter is rotated in the direction of the compression spring on the threaded spindle, wherein the spring tension can be reduced by the Federverstellmutter is adjusted in the direction of the support sleeve on the threaded spindle. The rotational movement, which is necessary for the axial adjustment of the spring adjusting, is via a Spring adjustment sleeve introduced into the Federverstellmutter. The spring adjusting sleeve is arranged to be axially movable relative to the spring adjusting nut, wherein the rotational movement can be transmitted via a positive connection. Thus, the Federverstellhülse remain in an axially stationary position, the Federverstellmutter performs the axial movement. This arrangement allows the initiation of a rotational movement in a stationary, but rotating Federverstellhülse, wherein furthermore an axially fixed and rotationally fixed threaded spindle can also be arranged stationary.

When an advantageous embodiment The invention provides that the positive connection between the Federverstellmutter and Federverstellhülse one in the axial direction uniform Polygon contour includes which inside of the Federverstellhülse and externally is formed on the Federverstellmutter, wherein the inside and the outside Polygon contour intertwined is arranged to rotate relative to each other an axial movement to enable. As a polygon contour, for example, a hexagon can be provided where also a square, an octagon or any other Polygon can be provided. Likewise, the application of a spline possible, which also transmit a torque can, and at the same time between the nested components such as the spring adjustment nut and the spring adjustment sleeve allows axial movement. Alternative embodiments The axially movable rotary joint can in the application of sliding blocks or feather keys, which are in the sense of a shaft-hub connection accomplished can be.

A advantageous arrangement of Federverstellhülse can be made possible thereby that these on the support sleeve and / or is fixed axially fixed to the threaded spindle and the Threaded spindle extends axially through the spring adjustment sleeve. The threaded spindle is screwed end into the support sleeve, and has a collar which between the end face of the Support sleeve and the collar itself provides the formation of a cylindrical section, which is designed as a sliding bearing. The spring adjustment sleeve has a cylindrical Inner portion, which on the cylinder portion of the threaded spindle is attached. If the threaded spindle is now screwed into the support sleeve at the end, such is the spring adjustment sleeve axially fixed, and rotatably supported due to the sliding bearing assembly. Thus, the spring adjustment sleeve coaxially arranged with a portion of the threaded spindle, wherein the spring adjusting nut can dip into the spring adjusting sleeve. through This arrangement is advantageously a maximum utilization the installation space possible, wherein the threaded spindle at least partially and in dependence extends from the adjusted position into the compression spring.

When An advantageous development of the invention is proposed that with the spring adjustment sleeve a first gear is connected rotationally fixed, via which the rotational movement in the spring adjustment sleeve can be introduced. The first gear stands with a second Gear engaged, wherein the rotational planes of the gears a Angle of about 90 ° to each other taking. The first gear can thereby on the portion of the sliding bearing between the spring adjustment sleeve and the threaded spindle on the Federverstellhülse be pressed or also a Grasp polygon to order this rotationally relative to the Federverstellhülse. A second gear is 90 ° offset arranged to the first gear, wherein the angle perpendicular to each other Orthogonal rotation planes of the gears describes. Thus, can the rotational movement from a direction perpendicular to the longitudinal axis of Door actuator and thus perpendicular to the longitudinal axis the threaded spindle or the spring adjustment are initiated. Possible embodiments the gearing can be a bevel gear, which also has a crown gear teeth can be provided. It is merely the transmission of a rotational movement over an angle required by 90 °, so that any further toothing option in the sense of the present Invention is applicable.

The second gear is rotatable by means of a gear receptacle in the housing stored, which is positioned so that this exactly with the first gear is engaged. The positioning can, for example, via a Can be realized diameter stage to which the support sleeve abuts, wherein the first gear rests flat against the end surface of the support sleeve. The gear receptacle for receiving the second gear in the housing is across from the housing pressure tight, being the seal over O-rings is realized. The gear holder can be from the outside of the housing the device are screwed, the positioning of the Ensuring an exact toothing over a stop collar provided can be, which is formed in the gear receptacle.

The gear receptacle in this case has a tool holder in order to initiate the rotational movement in the toothing and thus in the adjusting nut by means of a tool from the outside of the housing. The tool holder may comprise a hexagon socket, so that with an Allen key, the bias of the compression spring can be adjusted. The tool holder in the gear holder can be flush with the outside of the housing of Türbetätigungsvorrich completion, so that no components protrude from the device to ensure installation, for example in a door leaf. When installing the door operating device in a door leaf, the tool holder, for example, upwards, so that an operator by means of a tool, the bias of the compression spring and thus the restoring torque which exerts the door operating device on the door leaf, can adjust by means of a tool from above. If the door operating device is installed, for example, in the frame of a door, then the tool holder can be arranged in the direction of the door leaf, so that the operator performs the adjustment upside down.

forwards The operator now with a tool a rotary motion in the tool holder and thus in the gear recording, so is the second gear set in rotation. By engaging with the first gear is the rotational movement over a Angle of 90 ° the longitudinal axis transferred to the door operator, so that the first gear receives the rotational movement. Due to the non-rotating Arrangement of the first gear on the Federverstellhülse is this also set in rotation. This rotates the spring adjustment sleeve the fixed threaded spindle, wherein the Federverstellmutter in the spring adjustment sleeve is arranged coaxially. Due to the positive connection via a Polygon between the spring adjustment sleeve and the spring adjustment nut now the rotational movement is transferred to the Federverstellmutter, which due to the threaded hole on the threaded spindle axial movement performs. Does the Spring adjusting nut now along the threaded spindle in the direction of Compression spring, so the spring preload is increased, and the restoring torque, which the door operator on the door leaf exerts increases. Does the rotational movement on a direction of rotation, so that moves the spring adjusting nut in the direction of the support sleeve, so the spring preload decreases, what a lower return torque causing the door operator on the door leaf exercises. Thus, it is possible by means of a simple adjustment the restoring moment depending the door size, especially the door width and the door weight so that the corresponding legal requirements (EN3 ... EN6) can be maintained. This is especially true when used for fire doors in which Minimum restoring moments are predetermined.

advantageously, the threaded spindle comprises a spring adjustment stop, to which the Spring adjusting nut when screwing on the threaded spindle in the direction of the compression spring abuts and the Limited screwing. The spring adjusting nut has an annular end surface, which attached to a molding that extends beyond the spring plate extends in the direction of the compression spring. Now the spring adjusting nut adjusted in the direction of the compression spring, so hits when reaching the maximum Adjusting the annular end face of the Spring adjusting nut to the spring adjustment stop. From constructive establish It is particularly advantageous that the spring adjustment stop a Stop disc includes, which received on the threaded spindle is. The stop disk has an axial clearance, wherein the Axial play about 0.1 mm to 1 mm, preferably about 0.3 mm to 0.8 mm and more preferably about 0.4 mm to 0.5 mm. The stop disc is placed on the threaded spindle and by means of a locknut secured. The mentioned axial play thus arises between one Collar on the threaded spindle, on which the axial disc rests and the lock nut.

In any case the axial clearance causes the stop disc to rotate, so that when a toast the spring adjusting nut to the stop disc no Verkontern occur can. The effective friction diameter between the stop washer and the lock nut is smaller than between the stop washer and the annular end face the spring adjusting nut, so that even with a very tight twisting against the Fe derverstellanschlag at any time a release of the attack without much effort possible is. Especially when attacking in the direction of spring compression occur relatively high forces on, wherein the operator receives no information about, at which position the spring adjusting nut is located. Therefore it can by a Verkonterungsfreies Do not tighten the spring adjusting nut with the spring adjustment stopper come to a failure of the system, because the adjustment in Losdrehrichtung no power peak has to be overcome because the stop disc can rotate with it.

An advantageous embodiment of the locknut provides that this has a cylinder portion which allows centering of a pressure spring arranged in the second compression spring. The second compression spring is arranged coaxially with the first compression spring and serves to increase the maximum possible spring force on the drive unit. The second compression spring has an inner diameter which so fits over the cylinder portion, so that the spring is centered by the lock nut. At the end nut a hexagon is formed at the end, wherein between the spring stopper and the threaded portion of the threaded spindle also a hexagon is formed. When joining the threaded spindle in the end face of the support sleeve and the joining of the lock nut on a thread formed on the end side in the direction of the compression spring corresponding tools can be applied to the counter nut on the hexagonal formations Verkontern with the threaded spindle and screw the threaded spindle firmly in the support sleeve. The second compression spring is supported axially on the back of the stop plate, so that it fulfills both the function of a spring plate, and serves as a stop of the Federverstellmutter on the threaded spindle.

Further, the invention improving measures are in the subclaims or will be described below together with the description a preferred embodiment of the Invention with reference to the figures shown.

These show in

1 : A cross-sectional side view of a door actuator with a spring adjustment and a pressure compensation unit;

2 a representation of the unit from the spring adjustment and the pressure compensation unit according to the present invention; and

3 : a perspective view of the unit 2 in a non-assembled state.

In 1 is a door operator 1 illustrated, which is particularly suitable for a revolving door and can be installed for example in a door leaf or in a door frame. The door operator 1 includes a drive unit 10 which can be coupled to a door according to the present embodiment. The door operator 1 consists of a housing 11 in which a spring energy storage 12 is arranged. The spring energy storage 12 allows the storage of energy in the form of a spring compression, which when opening the door by the compression of a compression spring 13 is stored. Now, if the door is closed again, the spring energy storage acts 12 on the drive unit 10 , which is connected to the revolving door so that it performs a closing movement. The spring energy storage 12 includes a spring adjustment 15 , by means of the biasing force in the compression spring 13 is adjustable. The spring adjustment 15 is at least a housing-fixed support sleeve 16 constructed on the one fixed threaded spindle 17 is arranged. On the threaded spindle 17 is a Federver adjusting nut 18 screwed on, with the spring adjusting nut 18 via a spring adjustment sleeve 19 can be adjusted. The spring adjusting nut 18 is with the spring adjustment sleeve 19 rotatably connected via a positive connection, so that they can indeed move axially to each other, but do not rotate against each other.

The electrohydraulic drive 14 includes a special electric motor and a hydraulic unit, which is selectively driven by a gear through the engine. According to the embodiment of the door operating device 1 owns these by means of the electro-hydraulic drive 14 the possibility to perform the opening movement of the revolving door automatically, during the opening movement, the revolving door is set in motion and the compression spring 13 due to an axially moving to the compression spring 13 adjacent piston 20 In addition, it is stretched. About the pressurized pistons 20 . 21 In this case, the opening movement of the revolving door is initiated, wherein the drive unit 10 a cam-roller unit for implementing the axial movement of the piston 20 and 21 in a rotational movement of a shaft 22 includes. The components mentioned are inside the housing 11 arranged so that the door operating device 1 due to the narrow design with a width of for example 40 mm can be installed in a variety of revolving doors within the door leaves. Thus, it is possible to integrate the door operating device invisible from the outside into the door. The pistons 20 and 21 are applied via respective adjacent pressure chambers with a hydraulic fluid, wherein the fluid pressure via the electro-hydraulic drive 14 is made available. The fluid connections may be in the form of channels which are in the housing 11 are integrated.

2 and 3 show the view of the unit from the spring adjustment 15 and the pressure compensation unit 32 , these being in 2 is shown cut in an assembled view and in 3 is shown as exploded drawing in disassembled state. The non-rotating, ie fixed components of the spring adjustment 15 include the support sleeve 16 , the threaded spindle 17 , As well as an end arranged in the direction of the compression spring stop disc 29 , which by means of a locknut 30 on the threaded spindle 17 is arranged.

The rotating components of the spring adjustment 15 In contrast, include the second gear 24 which is in a gearwheel mount 25 is included, with the gear recording 25 which are in this rotating tool holder 27 picks up the second gear 24 to drive by means of a tool. Furthermore, the rotating components include the first gear 23 , which is rotationally fixed with the Federverstellhülse 19 connected is. This has a hexagon socket, which with the hexagon on the Federverstellmutter 18 axially joined. The spring adjusting nut 18 includes a molded spring plate 31 on which the compression spring 13 rests end-to-end.

The support sleeve 16 is as a pressure compensation unit 32 formed, which is a cylinder 33 around summarizes, in which a piston 34 is guided axially. To a pressure compensation chamber 35 to form, has the pressure compensation unit 32 furthermore a closure element 36 on, which has a threaded bore into which the threaded spindle 17 can be screwed in on the outside. Between the piston 34 and the closure element 36 is a compression spring 37 arranged, which in the pressureless state of the fluidic system, the piston 34 moved in one direction in which the pressure compensation chamber 35 is increased in volume. The piston 34 includes sealing elements 38 These are designed according to the present embodiment as lip seals and two times radially in the lateral surface of the piston 34 are arranged. With an increase in the pressure of the hydraulic fluid on the outside of the pressure compensation chamber 35 becomes the piston 34 in the direction of the pressure compensation chamber 35 moves, so that the pressure in the air-filled pressure compensation chamber 35 increases, and at the same time reduces the volume. The extension movement of the piston 34 from the pressure compensation chamber 35 is by an inner waistband 40 limited, which end on the cylinder 33 is available. This inner waistband 40 at the same time has a wrench size to use a corresponding tool when the closure element 36 with the cylinder 33 is screwed. To the disk-shaped closure element 36 screw, this has two wells 39 in which a special tool can be used to provide the torque required for screwing into the cylinder 33 applied.

This ensures that the pressure in the closed system of the hydraulic fluid does not increase excessively with a temperature increase, since the pressure compensation chamber 35 fulfills the function of a hydraulic accumulator. This is with the spring adjustment 15 both the adjustment of the bias of the compression spring 13 possible, as well as the integration of a pressure compensation unit 32 possible. Thus, two essential units of a door actuator as a structural unit are integrated with each other in such a way that it can be pre-assembled as a preassembled unit during assembly of the device.

1

Door actuator

10

drive unit

11

casing

12

Stored energy

13

compression spring

14

electrohydraulic drive

15

spring adjustment

16

support sleeve

17

screw

18

Federverstellmutter

19

Federverstellhülse

20

piston

21

piston

22

wave

23

first gear

24

second gear

25

gear receiving

26

Tool

27

tool holder

28

second compression spring

29

stop disc

30

locknut

31

spring plate

32

Pressure compensation unit

33

cylinder

34

piston

35

Pressure equalization chamber

36

closure element

37

compression spring

38

sealing element

39

deepening

40

inner collar

Claims (23)

Door operating device ( 1 ), in particular for a revolving door, with a drive unit ( 10 ), which can be coupled to a door and in a housing ( 11 ), further comprising a spring energy store ( 12 ), in which at least the energy required for the execution of the closing movement of the door can be stored and which at least one spring arranged under a spring ( 13 ), wherein the means of a threaded spindle ( 17 ) performed spring adjustment ( 15 ) is adjustable, and further wherein a fluid system is provided which a pressure compensation unit ( 32 ), Characterized in that the pressure equalizing unit ( 32 ) a support sleeve ( 16 ) forming at least one cylinder ( 33 ) and a closure element ( 36 ), which for receiving the spring adjustment ( 15 ) is formed, wherein the threaded spindle ( 17 ) axially and rotationally fixed to the support sleeve ( 16 ), and the spring energy store ( 12 ) and the pressure compensation unit ( 32 ) are designed as a single preassembled unit. Door operating device ( 1 ) according to claim 1, characterized in that the cylinder ( 33 ) end with the closure element ( 36 ) is closed. Door operating device ( 1 ) according to claim 1 or 2, characterized in that the threaded spindle ( 17 ) on the outside in the closure element ( 36 ) is screwed. Door operating device ( 1 ) according to claim 1 to 3, characterized in that the support sleeve ( 16 ) a piston ( 34 ), which in the cylinder ( 33 ) Is arranged axially displaceable. Door operating device ( 1 ) according to claim 4, characterized in that in the cylinder ( 33 ) between the closure element ( 36 ) and the piston ( 34 ) a pressure equalization chamber ( 35 ) is trained. Door operating device ( 1 ) according to claim 4 or 5, characterized in that between the piston ( 34 ) and the closure element ( 36 ) a compression spring ( 37 ) is arranged. Door operating device ( 1 ) according to claim 5 or 6, characterized in that the piston ( 34 ) at least one sealing element ( 38 ) to the pressure equalization chamber ( 35 ) dynamically pressure-tight against the inner wall of the cylinder ( 33 ) seal. Door operating device ( 1 ) according to one of the preceding claims, characterized in that the closure element ( 36 ) is disc-shaped and comprises an external thread, by means of which it ends in the cylinder ( 33 ) of the support sleeve ( 16 ) can be screwed. Door operating device ( 1 ) according to one of the preceding claims, characterized in that on the outside in the closure element ( 36 ) Wells ( 39 ) are formed to this end by means of a screwing into the cylinder ( 33 ) of the support sleeve ( 16 ). Door operating device ( 1 ) according to one of the preceding claims, characterized in that the cylinder ( 33 ) of the support sleeve ( 16 ) at the closure element ( 36 ) facing away from an inner collar ( 40 ) to a stop for the piston ( 34 ) to accomplish. Door operating device ( 1 ) according to one of the preceding claims, characterized in that the spring adjustment ( 15 ) a spring adjusting nut ( 18 ), which on the threaded spindle ( 17 ) can be screwed on. Door operating device ( 1 ) according to claim 11, characterized in that the spring adjusting nut ( 18 ) a spring plate ( 31 ), on which the compression spring ( 13 ) rests end-to-end. Door operating device ( 1 ) according to claim 11 or 12, characterized in that the rotational movement of the Federverstellmutter ( 18 ) on the threaded spindle ( 17 ) via a spring adjustment sleeve ( 19 ) in the Federverstellmutter ( 18 ) is introduced, wherein the Federverstellmutter ( 18 ) axially movable to Federverstellhülse ( 19 ) is arranged and the rotational movement is transferable via a positive connection. Door operating device ( 1 ) according to claim 13, characterized in that the positive connection between the Federverstellmutter ( 18 ) and the spring adjustment sleeve ( 19 ) comprises a uniform in the axial direction polygonal contour, which inside of the Federverstellhülse ( 19 ) and on the outside of the spring adjusting nut ( 18 ) is formed, wherein the inside and the outside polygonal contour are arranged joined together to allow relative to each other rotationally fixed an axial movement. Door operating device ( 1 ) according to any one of claims 11 to 14, characterized in that the spring adjustment sleeve ( 19 ) on the support sleeve ( 16 ) and / or on the threaded spindle ( 17 ) is axially fixed rotatably and the threaded spindle ( 17 ) by the spring adjustment sleeve ( 19 ) extends axially. Door operating device ( 1 ) according to one of claims 11 to 15, characterized in that with the Federverstellhülse ( 19 ) a first gear ( 23 ) is connected rotationally fixed, via which the rotational movement in the Federverstellhülse ( 19 ) and the first gear ( 23 ) with a second gear ( 24 ), wherein in particular the rotational planes of the gears ( 23 . 24 ) assume an angle of about 90 ° to each other. Door operating device ( 1 ) according to claim 16, characterized in that the second gear ( 24 ) by means of a gear recording ( 25 ) in the housing ( 11 ) is rotatably mounted. Door operating device ( 1 ) according to claim 17, characterized in that the gear receptacle ( 25 ) a tool holder ( 27 ) by means of a tool from the outside of the housing ( 11 ) the rotational movement in the toothing and thus in the Federverstellmutter ( 18 ). Door operating device ( 1 ) according to one of the preceding claims, characterized in that the threaded spindle ( 17 ) comprises a spring adjustment stop, to which the Federverstellmutter ( 18 ) during a screwing movement on the threaded spindle ( 17 ) in the direction of the compression spring ( 13 ) abuts and limits the screwing movement and that the spring adjustment stop a stop disc ( 29 ), which on the threaded spindle ( 17 ) is recorded. Door operating device ( 1 ) according to claim 19, characterized in that a locknut ( 30 ) end on the threaded spindle ( 17 ) is screwed to the stop disc ( 29 ) axially secure. Door operating device ( 1 ) according to claim 19 or 20, characterized in that the stop disc ( 29 ) has an axial play, wherein the axial play comprises about 0.1 mm to 1 mm, preferably about 0.3 mm to 0.8 mm and more preferably about 0.4 mm to 0.5 mm. Door operating device ( 1 ) according to claim 20 or 21, characterized in that the locknut ( 30 ) has a cylinder portion which a centering of a in the compression spring ( 13 ) coaxially arranged second compression spring ( 28 ). Door operating device ( 1 ) according to claim 22, characterized in that the second compression spring ( 28 ) axially on the stop disc ( 29 ) is supported.