DK2960414T3 - Drive device for a swing door - Google Patents

Description

Actuation device for a rotating door

The invention relates to a drive device for a swivel door of the type disclosed in the preamble of Claim 1.

Swivel door drives comprising a motorfor door opening and a spring accumulator for door closing, in which a rigid force or torque transmission takes place, are known from the prior art. During manual use of the door, the motor must be rotated with the door by the user, i.e. in this mode the swivel door drive acts as a pure door closer. Since the motor is usually preceded by a transmission, the restoring torque of the motor has a particularly serious impact. In other words, the person using the door must compensate not only the tension of the spring accumulator but also the loss due to the motor. This requires a higher force and is associated with loss of comfort. Drives with comparatively low power are difficult to produce, because the restoring torque of the motor is constant and has a particularly high percentage effect in this range. In addition, compliance with DIN 18263-4 and/or EN1154, which requires 50% efficiency, is difficult or impossible to achieve for rigidly connected systems. EP 1 643 065 A2 discloses a door drive for a swing door, which consists of a door frame and a door leaf pivotably hinged to the doorframe about a pivot axis, having a drive unit and a force transmission element. In this case the drive unit is arranged on the doorframe or on the door leaf, and the force transmission element is correspondingly arranged on the door leaf or on the door frame. The drive unit can comprise a drive spindle as the drive element, which can be driven by a drive motor. The power transmission element can be realized as a spindle nut, which transmits the opening force or closing force onto an output shaft. The drive unit also comprises a slip clutch which is arranged between the drive motor and the force transmission element in such a manner that a manual adjustability of the door leaf is ensured, with substantially no retroactive effect on the drive motor. WO 2011/138420 A1 discloses a door leaf drive device for driving a leaf of a swing door, comprising an electric motor and a gear ratio unit driven by the electric motor, the output member of which is rotatable about a transmission axis and can be directly connected to the door leaf for driving of same. In this case, the gear ratio unit is designed to perform a slip clutch function.

Drive devices of the type in question are described in US 4045914 A and US 5513467 A. EP2960414 DE 101 48 293 A1 discloses a drive device of the type in question for a swivel door, comprising a motorfor door opening and a spring accumulator for door closing. The motor acts against a spring force of the spring accumulator, wherein an opening or closing force acts on the piston with toothing via a drive spindle and a spindle nut, which toothing meshes with a pinion that is connected to an output shaft for conjoint rotation therewith.

The problem addressed by the invention is that of producing a drive device for a swivel door comprising a motor for door opening and a spring accumulator for door closing, which has a reduced force requirement and improved comfort during manual use.

This problem is solved by the features of the drive device for a swivel door according to Claim 1.

Advantageous embodiments and further developments of the invention are disclosed in the dependent claims.

Embodiments of the drive device for a swivel door according to the invention each comprise a motor for door opening and a spring accumulator for door closing, wherein the motor acts against a spring force of the spring accumulator. An opening or closing force acts on a piston with toothing via a drive spindle and a spindle nut, which toothing meshes with a pinion that is connected to an output shaft for conjoint rotation therewith. According to the invention, a single-direction clutch is arranged between the motor and the drive spindle, which interrupts a force flow between the motor and the drive spindle if a torque acting in the opening direction is present on the output shaft.

This advantageously allows easy operation of the swivel door during manual use and a standards-compliant implementation option for low-power drives. Through the design of the clutch, the transmitted torque is directly proportional to the set spring force of the spring accumulator or to the set door closing torque.

The basic idea of the invention is based on the single-direction clutch, which is disengaged in the presence of an additional torque acting in the opening direction on the output shaft, in conjunction with a screw drive coupled to the door closer piston. In this way, when the swivel door is used manually, the torque acting in the opening direction is exerted on the output shaft. This torque is converted by means of the toothing into an axial force, which negates the spring force of the spring accumulator and is transmitted via the drive spindle to the clutch. This means that the additional torque that is present in the opening direction on the output shaft can generate an axial force that is active in the clutch on the drive spindle, which acts counter to the spring force. The clutch then EP2960414 disengages and disconnects the motor from the force flow. As soon as there is no longer any torque present in the opening direction, the clutch engages again due to the active spring force of the spring accumulator and allows a motor-driven opening or a braked closing of the swivel door. This means that the clutch is engaged and the force flow can be produced between the motor and the drive spindle, if the spring force of the spring accumulator is active in the clutch. In an alternative embodiment, which is not according to the invention, the single-direction clutch can comprise a sleeve freewheel. The sleeve freewheel can advantageously be designed as an overrunning clutch. This enables a particularly simple and cost-effective implementation of the single-direction clutch. The torque acting in the opening direction on the output shaft during manual use of the swivel door, can be transmitted to the sleeve freewheel via the toothing and the drive spindle, which then carry out an overrun function and can disconnect the force flow between the motor and the drive spindle. As soon as there is no further torque present in opening direction, the sleeve freewheel can carry out a holding function, which produces the force flow between the motor and the drive spindle and can allow a motor-driven opening or a braked closing of the swivel door.

The clutch of the drive device for a swivel door according to the invention, comprises a bell connected to the drive shaft for conjoint rotation therewith and a pressure disc screwed onto the drive spindle, which is connected to a friction disc for conjoint rotation therewith. In addition, the bell is connected to a cover disc that is rotatably mounted on the drive spindle. The active spring force of the spring accumulator produces a frictional engagement between the friction disc and the cover disc by means of the pressure disc, which can transmit the rotation of the drive shaft to the drive spindle. On the other hand, the active axial force can lift the friction disc from the cover disc by means of the pressure disc and disconnect or interrupt the force flow between drive shaft and drive spindle.

In an advantageous embodiment of the drive device for a swivel door according to the invention, a transmission can be arranged between the motor and the clutch. By means of this, motors with lower power can advantageously be used. In a design without transmission, the clutch is arranged between the motor shaft and the drive spindle. In a design with transmission, the clutch can be arranged between the transmission shaft and the drive spindle, wherein the transmission shaft is coupled to the motor shaft via gear wheels Alternatively, the single-direction clutch can be arranged between the motor and the transmission.

In another advantageous embodiment of the drive device for a swivel door according to the invention, the drive spindle can be realized as a ball-screw spindle. The design as a EP2960414 ball-screw drive with a ball spindle and a ball-spindle nut advantageously ensures a particularly low-loss force flow and/or torque flow. In addition, a component can carry out the function of the spindle nut and the function of the piston with toothing. In this way, the number of parts can advantageously be reduced.

In another advantageous embodiment of the drive device for a swivel door according to the invention, the spring accumulator can comprise a helical compression spring. This allows a simple and cost-effective implementation of the spring accumulator. In addition, the helical compression spring can be arranged concentrically around the drive spindle and be supported at one end on the spindle nut and at the other end on a bearing flange. Through this arrangement, a compact construction can advantageously be achieved. Exemplary embodiments of the invention are detailed below by way of illustrative drawings. In the drawings, the same reference numbers indicate components or elements which carry out the same or analogous functions.

The figures show: figure 1, a cross-sectional view of an exemplary embodiment of a drive device for a swivel door according to the invention; figure 2, a detailed illustration of a clutch of the drive device for a swivel door according to the invention from figure 1; figure 3, a cross-sectional view of an exemplary embodiment of a drive device for a swivel door that is not according to the invention; and figure 2, a detailed illustration of a clutch of the drive device for a swivel door from figure 3.

As can be seen from figures 1 to 4, the illustrated exemplary embodiments comprise a drive device 1, 1A for a swivel door (not shown), each having a motor 3 for door opening and a spring accumulator 30 for door closing. Thus, the motor 3 acts against a spring force Ff of the spring accumulator 30 during the opening procedure. An opening or closing force generated by the motor 3 or the spring accumulator 30 acts on a piston 44, 44A with toothing 46 via a drive spindle 38 and a spindle nut 42, 42A, which toothing meshes with a pinion 48 that is connected to an output shaft 49 for conjoint rotation therewith. A singledirection clutch 20, 50 is arranged between the motor 3 and the drive spindle 38, which interrupts a force flow between the motor 3 and the drive spindle 38 if a torque acting in the opening direction is present on the output shaft 49. EP2960414

This means that the pinion 48 and the toothing 46 form a motion converter 40, 40A, which converts the translational motion of the piston 44, 44A with toothing 36 acting through the motor 3 or the spring accumulator 30 on the drive spindle 38 and the spindle nut 42, 42A, into a rotary motion of the pinion 48 with the output shaft 49, in order to open or close the swivel door.

As can also be seen from figures 1 and 2, in the illustrated exemplary embodiment of a drive device 1 for a swivel door according to the invention, during manual use of a door leaf (not illustrated) of the swivel door, the additional torque acting in the opening direction is exerted on the output shaft 49, which is converted by means of the pinion 48 and the toothing 46 into an axial force Fa and transmitted to the clutch 20 via the spindle nut 42 and the drive spindle 38. This means that the additional torque on the output shaft 49 creates the active axial force Fa on the drive spindle 38 in the clutch 20, which is opposed to the spring force Ff of the spring accumulator 30. In order to enable a torque transmission in both directions that is as loss-free as possible, the drive spindle 38, on an end facing away from the motor 3, is realized as a ball-screw spindle with a ball track 38.3, on which the spindle nut 42 is mounted in an axially movable manner.

As can also be seen from figures 1 and 3, the spring accumulator 30 comprises a helical compression spring 32 arranged in a housing profile 31. In the illustrated exemplary embodiment, the helical compression spring 32 is arranged concentrically around the drive spindle 38 and is supported at one end on the spindle nut 42, 42A and at the other end on a bearing flange 36. In order to support the helical compression spring 32, an axial bearing 34.2 is arranged on the spindle nut 42, 42A. An adjustment element 34.1 is screwed into the bearing flange 36 in order to support the helical compression spring 32, which enables the setting of a pretension for the helical compression spring 32.

Figures 1 and 2 show the clutch 20 in the engaged state, in which the force flow is produced between the motor 3 and the drive spindle 38 and the spring force Ff of the spring accumulator 30 is active in the clutch 20. In addition, in the illustrated first exemplary embodiment, a transmission 10 with a reduction gearing is arranged between the motor 3 and the clutch 20, which comprises a plurality of gear wheels 12, 14, 16. The rotation of an axially mounted motor shaft 5 of the motor 3, which is preferably embodied as an electric motor, is transferred via a motor pinion 7 to a first gear wheel 12 of the transmission 10, and via the gear wheels 14, 16 to an axially mounted transmission shaft 18. EP2960414

As can be seen in particular in figure 2, in the illustrated first exemplary embodiment, the clutch 20 comprises a bell 21 which is connected to the transmission shaft 18 for conjoint rotation therewith, and a pressure disc 24 which is screwed onto a thread 38.2 of the drive spindle 38. In the screwed-on state, the pressure disc 24 is supported on a support bush 27, which is pushed onto the drive spindle 38 and is further supported on a step 38.1 formed on the drive spindle 38. A friction disc 25 is connected to the pressure desk 24 via drive pins 26 for conjoint rotation therewith. In addition, the bell 21 is connected at the open end of a cover disc 22 to a friction lining, the cover disc being connected to the bell 21 via drive pins 2 for conjoint rotation therewith and rotatably mounted on the circumference of the support bush 27 that is pushed onto the drive spindle 38.

As can be seen from figure 2, the illustrated active spring force Ff of the spring accumulator 30 produces, via the pressure disc 24, a frictional engagement between the friction disc 25 and the friction lining of the cover disc 22, which transmits the rotation of the drive shaft 18 to the drive spindle 38. During manual use, the additional torque in the opening direction is exerted on the output shaft 49, which is converted by means of the pinion 48 and the toothing 46 into an axial force Fa and transmitted to the clutch 20 via the spindle nut 42 and the drive spindle 38. The active axial force Fa, illustrated as a dashed line, negates the spring force Ff of the spring accumulator 30, so that the active axial force Fa lifts the friction disc 25 by means of the pressure disc 24 and the support bush 27 from the cover disc 22 and disconnects the force flow between transmission shaft 18 and drive spindle 38. This means that the clutch 20 disengages, and a gap S that is present in the engaged state of the clutch 20 between a disc-shaped extension of the support bush 27 and a needle bearing 29 realized in the housing, is closed. Thus the distance between the friction disc 25 and the cover disc 22 in the disengaged state of the clutch 20, substantially corresponds to the gap S.

As can also be seen from figures 1 and 2, the drive spindle 38 is axially mounted by means of the support bush 27 in the region of the clutch 20 through a roller bearing. In order to further reduce the friction losses, a needle bearing 29 is likewise mounted between the housing and the cover disc 22. As soon as no further torque is present on the output shaft 49 in opening direction, and therefore the spring force Ff again acts in the clutch 20, the clutch 20 engages and allows a motor-driven opening or a braked closing of the swivel door.

In an alternative embodiment (not illustrated) of the drive device 1 for a swivel door according to the invention, the transmission 10 between the motor 3 and the clutch 20 EP2960414 can be omitted, so that the bell 21 in this exemplary embodiment is connected to the motor shaft 5 for conjoint rotation therewith.

As can further be seen from figures 3 and 4, in the illustrated exemplary embodiment of a drive device 1A for a swivel door, that is not according to the invention, the singledirection clutch 50 comprises a sleeve freewheel 52. The sleeve freewheel 52 is realized in the illustrated exemplary embodiment as an overrunning clutch and divides the motor shaft 5, wherein the sleeve freewheel 52 couples the motor shaft 5 to a second part of the motor shaft 5A. In contrast to the embodiment according to the invention, the motor pinion 7 is arranged at the end of the second part of the motor shaft 5A. In addition, a shaft coupling and slip clutch 54 is arranged between the motor shaft 5 and the second part of the motor shaft 5A, which advantageously enables an axial tolerance compensation between the motor shaft 5 and the second part of the motor shaft 5A. In addition, by means of the slip clutch function, overloading of the motor 3 can be advantageously prevented.

The design of the transmission 10 is the same in both exemplary embodiments. In addition, the single direction clutch 20 arranged between the transmission 10 and the drive spindle 38 in the exemplary embodiment according to the invention is replaced by a fixed coupling 20A in the illustrated embodiment that is not according to the invention, which connects the transmission shaft 18 permanently with the drive spindle 38.

In an alternative embodiment that is not illustrated, comprising a sleeve freewheel 52, the drive spindle 38 can be directly coupled to a corresponding toothing in the transmission 10, for example via a pinion screwed onto the transmission-side end, in order to produce the force-fit between motor 3 and drive spindle 38. In order to enable a torque transmission in both directions that is as loss-free as possible, analogously to the exemplary embodiment according to the invention, on an end facing away from the motor 3, the drive spindle 38 is realized as a ball-screw spindle with a ball track 38.3 on which the spindle nut 42A is mounted in an axially movable manner. In contrast to figurel, a component 45A carries out the function of the spindle nut 42A and the function of the piston 44A with toothing 46. This component 45A can also be used with the spindle nut 42A and the piston 44A in the first exemplary embodiment, instead of the spindle nut 42 and the piston 44.

In the exemplary embodiment that is not according to the invention illustrated in figure 3 and 4, during manual use, a torque acting in the opening direction is exerted on the drive shaft 49 via a door leaf (not illustrated) of the swivel door, which is transmitted to the sleeve freewheel 52 via the drive pinion 48, the toothing 46 and the drive spindle 38, and EP2960414 activates an overrunning function in the sleeve freewheel 52. The overrunning function disconnects the force flow between the motor 3 and the drive spindle 38, if the additional torque in the opening direction is present on the output shaft 49. As soon as there is no further torque present in opening direction, the sleeve freewheel 52 carries out a holding function, which produces the force flow between the motor 3 and the drive spindle 38 and allows a motor-driven opening or a braked closing of the swivel door.

In an alternative exemplary embodiment, which is not according to the invention, of the drive device 1A for a swivel door, the transmission 10 can be omitted so that the second part of the motor shaft 5A is directly connected to the drive spindle 38 in the case of this exemplary embodiment. In addition, in an exemplary embodiment that is not illustrated, the sleeve freewheel 52 can also be arranged between the transmission 10 and the drive spindle 38, wherein the arrangement between the motor 3 and the transmission 20 is preferred because of the smaller active torque.

Embodiments of the drive device according to the invention for a swivel door, advantageously enable easy actuation of the swivel door during manual use and a standards-compliant implementation option for motors with low power having an efficiency of less than 50%. Through the design of the clutch, the transmissible torque is directly proportional to the set spring force or to the set door closing torque. In other words, the person using the swivel door must only compensate the tension of the spring accumulator and not the losses caused by the motor, so that a reduced force input is required. EP2960414

Reference sign list 1, 1A drive device for a swivel door 3 motor 5, 5A motor shaft 7 motor pinion 10 transmission 12, 14, 16 gearwheel 18 transmissionshaft 20, 50 single-direction clutch 20A fixed coupling 21 bell 22 cover disc with friction lining 23 drive pin 24 pressure disc 25 friction disc 26 drive pin 27 support bush 28 roller bearing 29 needle bearing 30 spring accumulator 31 housing profile 32 helical spring 34.1 adjustment element (spring pretension) 34.2 axial bearing (spring support) 36 bearing flange 38 drive spindle 38.1 step 38.2 tread 38.3 ball track 40, 40A motion converter 42, 42A spindle nut 44,44A piston 45A component EP2960414 46 toothing 48 drive pinion 49 output shaft 52 sleeve freewheel 54 shaft coupling and slip clutch S gap

Ff spring force

Fa axial force EP2960414

Claims (10)

Drive Device for a Swing Door 1. Drive device (1) for a swing door, with a motor (3) for door opening and a spring accumulator (30) for! door Suction where the motor (3) acts against a spring force (Fp) in the spring accumulator (30) and with a drive pin! (38), a spindle nut (42, 42A) and a piston (44, 44A) with a tooth (46), in which an opening or closing force via the drive spindle (38) and the spindle nut (42, 42A) acts on the piston (44, 44A). ) with toothed gear (46) engaging a tooth drive (48) connected pivotally to a drive shaft (49), the drive device (1) s characterized in that between the motor (3) and the drive shaft (38) is provided a unilaterally acting clutch (20) which interrupts a power flow between the motor (3) and the drive spindle (38) when there is an additional torque acting in the opening direction on the drive shaft (49) of the drive device (1). torque present in the opening direction at the drive shaft (49) produces an axial force (Fa) acting on the clutch (20) on the drive spindle (38) and opposite to the spring force (Fp) and where the clutch (20) comprises a bell (21). pivotally connected to a drive shaft (18) in the drive (1) and a pressure washer (24) screwed onto the drive spindle (38) and pivotally connected to a fiction disk (25), the clock (21) being connected to a sheave disc (22) mounted rotatably on the drive spindle (38). Drive device according to claim 1, characterized in that the clutch (20) is indented and establishes the power flow between the motor (3) and the drive spindle (38) when the spring force (Fp) t the spring accumulator (30) is active in the clutch (20). Drive device according to claim 1, characterized in that the effective spring force (Fp) in the spring accumulator (30) establishes via the pressure disc (24) a friction suction with the friction disc (25) and the cover disc (22) which transmits the rotation of the drive shaft (18) to the drive shaft. (38). Drive device according to claim 1 or 3, characterized in that the effective axial force (Fa) lifts the friction disc (25) up from the cover disc (22) via the pressure disc (24) and separates the power flow between the drive shaft (18) and the drive spindle (38). A driving device according to any of claims 1 to 4, characterized in that a gear (10) is arranged between the motor (3) and the clutch (20, 50). The drive arrangement according to one of claims 1 to 5, characterized in that the drive shaft (18) represents a gear shaft (18) or a motor shaft (5), Drive device according to one of claims 1 to 6, characterized in that the drive spindle (38) is designed as a ball screw spindle. Drive device according to one of claims 1 to 7, characterized in that a component (45A) acts spindle nut (42A) and piston (44A) with toothed (46). Drive device according to one of Claims 1 to 10! 8, characterized in that the spring accumulator (30) is provided with a compression spring (32), Drive device according to claim 9, characterized in that the compression spring (32) is located concentrically around the drive spindle (38) and at one end is supported on the spindle nut (42, 42A) and at the other end of a bearing flange (36),