Adjustment driver and corresponding method

Abstract

The invention relates to an adjusting drive (1), wherein an accumulator (6) that can be supplied to an emergency drive (5) is designed to be tensionable by an electric motor (2), and wherein the motor (2) moves at least one actuating element (41, 42) of the accumulator (6) along an adjustment path during normal operation, and a restoring force of the accumulator (6) acts on the at least one actuating element.

Description

Technical Field

[0001] The invention relates to an adjusting drive having a motor and an output device drivable by the motor and couplable to a fitting, and having an emergency drive with an accumulator, by means of which the output device can be driven instead of the motor.

[0002] The invention also relates to a method for charging the accumulator of the adjusting drive. Background Art

[0003] It is known that adjusting drives designed to be connected to fittings and to manipulate the fittings are equipped with emergency drives in order to place the correspondingly connected fittings in a defined position or state in the event of an interruption of the primary energy supply (for example, a power failure). Summary of the Invention

[0004] The object of the invention is to reduce the constructional outlay of the adjusting drive.

[0005] To achieve the object, advantageous features are provided according to the invention. In particular, therefore, to achieve the object, it is proposed according to the invention in an adjusting drive of the type mentioned at the beginning that the accumulator is a pneumatic accumulator. An accumulator can thus be used which can be constructed with a lower dead weight compared to an accumulator having a mechanical spring force, since the mechanical spring can be dispensed with. The constructional outlay can thus be reduced. A further advantage is that a physically independent system can be provided for the emergency drive. In this case, the fitting can be constructed, for example, as a valve, a slide, a cock or a flap or having at least one valve, slide, cock and / or flap.

[0006] In an advantageous embodiment, it can be provided that the accumulator comprises a pressure chamber having an expandable volume, wherein, during operation of the emergency drive, the expansion movement of the pressure chamber can be guided onto the output device. Thus, the pressure that can be generated in the accumulator can be directly converted into a drive for the output device. The operation of a compressor for operating the emergency drive can be dispensed with.

[0007] It is preferably provided that the pressure chamber, in particular the pressure chamber already mentioned, can be operated in a hermetically sealed manner during operation. Thus, the operation of a compressor for operation and / or an unloaded accumulator can be pre-tensioned using the initial pressure.

[0008] In an advantageous embodiment, it can be provided that the accumulator is connected to a monitoring device designed to monitor the operating pressure of the accumulator. Thus, the readiness for use of the emergency drive can be simply monitored.

[0009] In an advantageous embodiment, it can be provided that the accumulator is connected to a filling device which is designed to increase the operating pressure of the accumulator by supplying gas. Thus, the loading of the accumulator and / or the restoration of the function of the emergency drive can be simply implemented.

[0010] For example, depending on further requirements such as explosion protection or flammability or availability, as the gas, compressed air or nitrogen or other gases can be used.

[0011] In an advantageous embodiment, it can be provided that the accumulator has at least one pressure chamber which is delimited by at least one tank and at least one piston movably guided in the tank. Thus, the pressure can be simply converted into a mechanical force which can be used to drive the output device.

[0012] In this case, it can be provided that a seal is constructed between the piston and the tank, and the seal divides the pressure chamber into two fluid-connected sub-chambers by its position. Thus, the space passed through by the seal during expansion can be used to store compressed air which can be used to drive the expansion.

[0013] In an advantageous embodiment, it can be provided that one of the two sub-chambers of the pressure chamber, in particular the pressure chamber already mentioned, one of the two sub-chambers already mentioned, is constructed in the piston of the accumulator, in particular the piston already mentioned. Thus, a space for receiving the energy-carrying air can be provided in the movable part of the accumulator.

[0014] In an advantageous embodiment, it can be provided that one of the two sub-chambers of the pressure chamber, in particular the pressure chamber already mentioned, one of the two sub-chambers already mentioned, is constructed in the tank of the accumulator, in particular the tank already mentioned. Thus, a space for receiving the energy-carrying air can be provided in the stationary part of the accumulator.

[0015] In an advantageous embodiment, it can be provided that another pressure chamber is fluid-connected to the pressure chamber. Thus, the energy storage for the energy-carrying air can be expanded.

[0016] In this case, the other pressure chamber can be connected, for example, to the tank already mentioned in particular. Thus, additional energy-carrying air can be simply provided in the pressure chamber.

[0017] In this case, it can be provided that the other pressure chamber surrounds the pressure chamber. Thus, additional axial structural space for the other pressure chamber can be dispensed with.

[0018] In this case, alternatively or additionally, it can be provided that the other pressure chamber is delimited by the outer side of the tank. Thus, additional walls can be reduced. Thus, a smaller radial space requirement can also be maintained.

[0019] Alternatively or additionally, for achieving the object set forth at the beginning, it can be provided in an adjusting drive of the type described that the energy accumulator can be loaded with a preferably electric motor. The advantage here is that an additional motor for loading the energy accumulator can be dispensed with. Thus, the constructional outlay of the adjusting drive can be reduced.

[0020] In particular, it can be provided here that the loading can be effected by actuating the motor towards the end position of the adjusting drive. Thus, a switchable input coupling of the motor to the energy accumulator for loading can be dispensed with.

[0021] In an advantageous embodiment, it can be provided that the energy accumulator has a spring energy accumulator. Thus, for example, an alternative energy accumulator can be provided for applications where the use of compressed air is not desired or not possible.

[0022] Particularly advantageously, the spring energy accumulator and the pneumatic energy accumulator can be interchanged, for example to form a series of adjusting drives, where the remaining parts and components apart from the type of energy accumulator can be selected identically.

[0023] In an advantageous embodiment, it can be provided that the emergency drive and the motor are arranged in series with respect to the output device. Thus, the torque generated by the motor can be simply used to load the energy accumulator.

[0024] In this case, it can be provided that the emergency drive is arranged in the drive train between the motor and the output device. Thus, a compact adjusting drive can be formed.

[0025] In an advantageous embodiment, it can be provided that the emergency drive and the motor are arranged in parallel with respect to the output device. Thus, the torque generated by the motor can be simply bypassed around the emergency drive and guided to the output device.

[0026] In an advantageous embodiment, it can be provided that the emergency drive and the motor are coupled to each other such that the correspondingly generated torques and / or forces are superimposed at the output device. Thus, for example, a coupling device for selectively switching on the motor or the emergency drive can be dispensed with.

[0027] In an advantageous embodiment, it can be provided that the motor is drivingly connected to the output device by a self-locking transmission. Advantageously here, one motor side of the adjusting drive can be used as a support point for the emergency drive.

[0028] Preferably, the emergency drive can be driven back by the output device, for example for loading the energy accumulator.

[0029] Preferably, in this case it is provided that the motor is drivingly connected to the coupling point of the motor and the emergency drive by a self-locking transmission. Thus, it can be prevented that the emergency drive can drive the motor back. Thus, the self-locking transmission can be used as a stop against which the emergency drive can be supported during its operation.

[0030] In an advantageous embodiment, it can be provided that the accumulator has a detector by means of which the loaded state of the accumulator can be detected. Thus, the full loading of the accumulator can be monitored. In this case, when the loaded state is detected, the motor can be switchable off and / or switched off.

[0031] In an advantageous embodiment, it can be provided that the emergency drive and the motor are coupled to each other such that the torques generated accordingly are superimposed at the output device. Thus, the torque generated by the motor can be simply applied to the accumulator, for example by blocking the output device.

[0032] In an advantageous embodiment, it can be provided that the accumulator has a locking device by means of which the unloading of the accumulator can be prohibited. It is advantageous here that the loaded state of the accumulator can be maintained until a drive device with an emergency drive is required.

[0033] In an advantageous embodiment, the position of the locking device is detectable. Thus, an emergency operation can be simply and directly identified. For example, this can be combined with the detection of reaching a relevant end position, so that the end of the emergency operation can be identified.

[0034] In an advantageous embodiment, it can be provided that the output device is a rotary output device. Thus, the invention can be used for fittings actuated by a rotary or pivoting movement.

[0035] In an advantageous embodiment, it can be provided that the output device is a translational output device. Thus, a direct drive can be implemented by the expansion movement of the accumulator.

[0036] Thus, the accumulator can be dimensioned such that in the expanded state both end position switches of the adjustment path of the adjustment drive are actuated and / or a locking device detected as open, preferably in combination with the end position switches. This allows for a simple detection of the expanded state and a simple differentiation from normal operation.

[0037] Alternatively or additionally, to achieve the object according to the invention, features for a method are provided. In particular, thus to achieve the object according to the invention in a method of the type described at the beginning, it is proposed to construct an adjustment drive according to the invention, in particular an adjustment drive as described above, wherein the adjustment drive runs the motor towards an end stop and further runs the motor until the accumulator is loaded. It is advantageous here that it is possible to dispense with switching the operating mode of the motor between the actuation of the connected fitting and the loading of the accumulator. A direction change of the motor is not compulsorily necessary.

[0038] In an advantageous embodiment, it can be provided that the motor is switched off when a loaded state of the accumulator is detected. Thereby, a thermal and / or mechanical overload of the regulating drive can be avoided.

[0039] In an advantageous embodiment, it can be provided that unloading of the accumulator in the loaded state is preferably automatically prohibited. Here, it is advantageous that an accidental unloading of the accumulator can be avoided.

[0040] In an advantageous embodiment, it can be provided that the accumulator is unloaded during operation of the emergency drive until both end position switches of the adjustment path of the regulating drive are actuated simultaneously or the (upper) end position and the open locking device are recognized.

[0041] In an advantageous embodiment, it can be provided that for loading the accumulator, at least one actuating element of the accumulator is moved along its adjustment path during normal operation, and the return force of the accumulator acts on the actuating element. Thereby, no additional structural space is required for tensioning the accumulator. Description of the Drawings

[0042] The invention will now be described in more detail with reference to embodiments, but is not limited thereto. Further embodiments result from combinations of individual or multiple features.

[0043] In the drawings:

[0044] Figure 1 A partially open view of the regulating drive according to the invention in a first adjustment position, looking towards the output device;

[0045] Figure 2 Showing according to Figure 1 A view of the regulating drive looking towards the rear side and the partially open accumulator;

[0046] Figure 3 Showing the regulating drive according to Figure 1 in an intermediate position;

[0047] Figure 4 Showing Figure 3 A view of the regulating drive in

[0048] Figure 5 Showing the regulating drive according to Figure 1 in the lower or second adjustment position;

[0049] Figure 6 Showing according to Figure 5 A view of the regulating drive looking towards the rear side and the partially open accumulator;

[0050] Figure 7 Showing the regulating drive according to Figure 6 after unlocking of the emergency driveThe regulating drive, wherein the emergency drive is completely stopped;

[0051] Figure 8 Shows Figure 3 The regulating drive in, wherein the emergency drive is unlocked and completely stopped;

[0052] Figure 9 Shows according to Figure 8 The regulating drive, viewed from the rear, with the accumulator removed;

[0053] Figure 10 Shows according to Figure 1 A partially cut-away view of the accumulator tank of the regulating drive according to;

[0054] Figure 11 Shows the piston and the output device of the accumulator of the regulating drive according to Figure 1 ;

[0055] Figure 12 Shows according to Figure 1 An enlarged sectional view of the lower region of the assembled accumulator of the regulating drive according to;

[0056] Figure 13 Shows a partially cut-away view of the locking device of the accumulator of the regulating drive according to in the unlocked position; Figure 1 ;

[0057] Figure 14 Shows the locking device according to Figure 13 in the locked position;

[0058] Figure 15 Shows Figure 1 An enlarged view and the upper end position switch above;

[0059] Figure 16 Shows a circuit diagram for explaining the function of the regulating drive according to the invention;

[0060] Figure 17 Shows an axial sectional view of another regulating drive according to the invention, having a spring accumulator as the accumulator;

[0061] Figure 18 Shows the regulating drive in Figure 17 without the handwheel and the motor, Figure 17 an axial sectional view rotated 90° relative to;

[0062] Figure 19 Shows the regulating drive in Figure 18 without the housing,

[0063] Figure 20Showing without an output device Figure 19 Side view of the adjustment drive in

[0064] Figure 21 Showing Figure 17 Axial view of the locking device of the adjustment drive in Detailed description of the specific implementation

[0065] These drawings will be described together below.

[0066] The adjustment drive, generally designated by 1, has a motor 2 which can be actuated in a manner known per se by an output device 3.

[0067] The adjustment drive 1 has an output device 4 which can be coupled in a manner known per se to a fitting not shown in detail here. Thus, the fitting can be actuated by the motor 2. Thus, for example, motorized opening and / or closing can be carried out.

[0068] The adjustment drive 1 also has an emergency drive 5 which can also be used to drive the output device 4, for example when the energy supply to the electric motor 2 is interrupted.

[0069] For this purpose, the emergency drive 5 is supplied by an accumulator 6.

[0070] In the embodiment, the adjustment drive 1 has an output device 4 which can move linearly.

[0071] In the embodiment according to the figures shown, the accumulator 6 is constructed, for example, as a pneumatic accumulator 7.

[0072] The pneumatic accumulator 7 has a pressure chamber 8 which encloses an expandable volume 9 in a sealed manner towards the outside.

[0073] Due to the overpressure in the pressure chamber 8, the emergency drive 5 is driven by the expansion movement of the expandable volume 9.

[0074] Figure 16 A pressure intensifier 10 is shown which is connected to the pneumatic accumulator 7 and is supplied by a gas supply device 11 which is shown here by way of example as a compressed air supply device.

[0075] The pressure intensifier 10 is optional: for example, the compressed air supply device can provide compressed air at 6 bar, and with the pressure intensifier 10 shown, this pressure can be increased to, for example, 10.5 bar without an additional energy source. This option may be necessary or advantageous if the supply pressure is not sufficient to achieve the required force.

[0076] In this case, the monitoring device 12 can be designed to detect the instantaneous operating pressure 13 in the pressure chamber 8 and, when the operating pressure 13 drops below a predetermined value, to control the filling device 14, which can include the pressure intensifier 10. Thus, the operating pressure 13 can be adjusted or regulated by the filling device 14.

[0077] In a further embodiment, for example in a gas supply device that provides a gas different from compressed air, the monitoring device 12 can also be directly connected to the gas supply device 11.

[0078] The pressure reducing valve 15 protects the accumulator 6 against overloading.

[0079] The pneumatic accumulator 7 has a cylinder 16 in which a piston 17 is movably guided.

[0080] The already mentioned expansion movement results from the movement of the piston 17 in the cylinder 16, which is driven by the operating pressure 13 that is higher than the ambient pressure.

[0081] A surrounding seal 18 is constructed between the piston 17 and the cylinder 16, which seals the pressure chamber 8 externally.

[0082] Thus, the piston 17 and the cylinder 16 form two acting elements 41, 42, which can move towards each other against the pressure-induced return force.

[0083] The seal 18 delimits an imaginary separation surface between a first compartment 19 in the cylinder 16 and a second compartment 20 in the piston 17. The first compartment 19 is fluidly connected to the second compartment 20 via a communication opening 21.

[0084] When the piston 17 extends in the cylinder 16, the seal 18 passes through the space 22 inside the cylinder.

[0085] This space 22 was occupied by the second compartment 20 before the expansion movement.

[0086] Another pressure chamber 23 is constructed radially outside the cylinder 16, which also uses the cylinder 16 as a boundary. Another pressure chamber 23 is fluidly connected to the first compartment 19 such that an overfilled air filling can flow into the first compartment 19.

[0087] Due to this nested structural arrangement, the axial structural space 24 of the non-expanded accumulator can be designed to be minimized.

[0088] In this case, the outer side 25 of the cylinder 16 forms the inner boundary of another pressure chamber 23.

[0089] Thus, the radial space requirement 26 of the accumulator can be selected to be minimized.

[0090] The adjusting drive 1 is equipped with two stops 27 and 28 for one end position each. In this case, the stop 27 is for the first or upper end position of the adjusting drive 1, as Figure 1 shown.

[0091] The stop 28 is for defining the other or lower end position of the adjusting drive 1, as Figure 5 shown.

[0092] In this case, the stop 27 has a first end position switch 29 and the stop 28 has a second end position switch 30.

[0093] A self-locking transmission 31, for example a worm gear transmission, is constructed between the motor 2 and the output device 4. The self-locking transmission 31 has the function of not being able to return to the drive motor side through the output device 4.

[0094] Downstream of the self-locking transmission 31, a spindle drive 32 is connected, which is constructed here, for example, as a ball recirculating screw.

[0095] In a further embodiment, the spindle drive 32 can alternatively be constructed to be self-locking, for example by a trapezoidal spindle. The additional self-locking transmission 31 can be omitted.

[0096] Thus, a support point 34 is formed on the motor side for the action of the emergency drive 5, which will be described in more detail later.

[0097] Hereinafter, the function mode of the adjusting drive according to the invention will be described in more detail based on the Figures 1 to 8 movement sequence therein.

[0098] The starting point is the situation according to Figure 1 and Figure 2 . The accumulator 6 is fully compressed and the adjusting drive 1 is moved to its upper adjusting position, which is defined by the stop 27. The connected fitting (not shown) is in the first functional terminal position.

[0099] The associated first end position switch 29 is actuated.

[0100] If the adjusting drive 1 is now actuated, the accumulator 6 will move together with the output device 4 in the direction of the stop 28 based on the spindle drive 32.

[0101] Figure 3 and Figure 4 show an intermediate state of this movement.

[0102] Since the output device 4 moves, the connected fitting is transferred to its second functional terminal position or positioned in any intermediate position to adjust the volume flow, especially during the adjustment operation.

[0103] This adjusting movement can continue until the stop 28 is reached and the second end position switch 30 at this stop 28 is actuated.

[0104] Figure 5 and Figure 6 show these situations.

[0105] If the emergency drive 5 is now triggered, the mechanical connection between the first actuating element 41 and the second actuating element 42, here specifically the mechanical connection between the tank 16 and the piston 17, is released. As will be described in more detail below, this mechanical connection is released by the locking device 36.

[0106] For example, it can be set that when the current supply to the motor 2 is interrupted, the locking device 36 is automatically triggered.

[0107] Thus, the locking device 36 actuates the coupling point 35 at which the force that can be generated by the motor 2 or the emergency drive 5 can act on the output device 4.

[0108] Due to the operating pressure in the pressure chamber 8, the accumulator 6 expands and the actuating elements 41 and 42 move away from each other.

[0109] The output device 4 is rigidly connected to the movable actuating element 42, i.e., the piston 17, so that the output device 4 moves upward by the expansion movement.

[0110] This causes a conversion or change, such as opening or closing or changing the fitting position of the fitting.

[0111] This movement ends at the latest at the stop 27.

[0112] Figure 8 Shows the situation after the locking device 36 is opened at the central position of the adjustment area.

[0113] In this case, the accumulator 6 can only be partially unloaded until the stop 27 is reached.

[0114] In order for the accumulator 6 to be reloaded and returned to the adjustment operation, the adjustment drive 1 now runs in the direction in which the accumulator 6 presses against the stop 27. The first end position switch 29 is ignored here, which would normally cause the motor 2 to be switched off.

[0115] For example, the control unit 3 can decide this later because the locking device 36 is opened.

[0116] The operation of the adjustment drive beyond reaching the stop 27 and actuating the first end position switch 29 causes the accumulator 6 to be compressed again.

[0117] This movement continues until the actuating elements 41 and 42 are again placed in their relative positions to each other where they can be locked or blocked.

[0118] Figure 13 The locking device 36 before reaching this position is shown in a detailed view.

[0119] In this case, the locking device 36 has a toggle lever 37, which can be fixed by an electromagnet 38 (such as a holding magnet) in its almost extended position.

[0120] The locking device 36 also has a return element 39, by means of which the toggle lever 37 is pressed near its fully inserted position so that the electromagnet 38 can be attracted.

[0121] Figure 14 The state is shown in which the actuating elements 41 and 42 are pressed so close to each other that they can be locked.

[0122] In this case, the return element 39 presses the toggle lever 37 into the recess 48, so that the electromagnet 38 is placed in a position where a holding force can be generated electromagnetically.

[0123] In this state, the situation of Figure 1 and Figure 2 is formed again.

[0124] Figures 17 to 21 Another adjusting drive 1 according to the invention is shown. Components and functional units with similar or identical structures and / or functions are denoted by the same reference numerals and are not described separately again. Therefore, the description regarding Figures 1 to 16 correspondingly applies to Figures 17 to 21 .

[0125] According to Figures 17 to 21 the embodiment, the output device 4 is configured to rotate.

[0126] For this purpose, the movable actuating element 42 of the energy accumulator 6 acts on the cam 43. The cam 43 loads the roller 44 arranged on the output device 4.

[0127] This causes the expansion movement of the energy accumulator 6 to be converted into a rotational movement of the output device.

[0128] The motor 2 drives the central shaft 45, which can be locked by the locking device 36 with the output device 4.

[0129] Therefore, the locking device 36 manipulates the coupling point 35, at which the torques that can be generated by the motor 2 and the emergency drive 5 are supported to act on the output device 4.

[0130] In this locked position, the energy accumulator 6 is compressed and rotates together during the normal operation of the adjusting drive 1.

[0131] In the illustrated embodiment, the accumulator 6 has a spring accumulator 46 with a disc spring 47.

[0132] However, a pneumatic accumulator 7 can also be used instead of the spring accumulator 46.

[0133] Figure 19 It is shown that the output device 4 can be moved towards two stops 27, 28, which respectively define the end positions of the adjusting drive 1.

[0134] If the locking device 36 is released in the case according to Figure 19 the output device 4 can move independently of the central axis 45.

[0135] As long as the motor 2 does not move, the central axis 45 is fixed due to the self-locking transmission 31.

[0136] This causes the accumulator 6 to be unloaded when the locking device 36 is opened, so that the cam 43 forces the roller 44 and thus the output device 4 into a rotational movement.

[0137] This rotational movement continues until the second stop 28 is reached.

[0138] If the adjusting drive 1 now continues to run in the same direction (which must be switched off by the end position switch 30), the cam 43 (which is arranged non-rotatably but axially displaceably on the central axis 45) will move further and be pressed upwards by the stationary roller 44. The spring accumulator 46 is thus tensioned.

[0139] This can continue until the locking device 36 drops, which can be detected by the associated third end position switch 40 acting as a detector. In this case, the return spring 39 acts to press the toggle lever 37 into the recess 48.

[0140] In this position, the adjusting drive 1 is ready to return the connected fitting to the first end position defined by the stop 27.

[0141] Thus, it can generally be said that in the foregoing embodiment, the accumulator 6 is unloaded during the operation of the emergency drive 5 until the end position switch 30 of the adjustment path defined by the stop 28 is actuated.

[0142] It can also be seen from the drawings that a movable actuating element 42 is arranged axially displaceably guided relative to the central axis 45, on which the return force of the accumulator 6 acts and by means of which the accumulator 6 can be tensioned or loaded.

[0143] Therefore, it is proposed in the adjustment drive 1 that the energy accumulator 6 be designed to be tensionable by means of the electric motor 2, by which the emergency drive 5 can be supplied, wherein the motor 2 moves at least one actuating element 41, 42 of the energy accumulator 6 along the adjustment path of normal operation, and the return force of the energy accumulator 6 acts on the actuating element.

[0144] List of reference numerals

[0145] 1 Adjustment drive

[0146] 2 (Electric) motor

[0147] 3 Control unit

[0148] 4 Output device

[0149] 5 Emergency drive

[0150] 6 Energy accumulator

[0151] 7 Pneumatic energy accumulator

[0152] 8 Pressure chamber

[0153] 9 Expandable volume

[0154] 10 Compressor

[0155] 11 Gas supply device

[0156] 12 Monitoring device

[0157] 13 Operating pressure

[0158] 14 Filling device

[0159] 15 Pressure reducing valve

[0160] 16 Tank

[0161] 17 Piston

[0162] 18 Seal

[0163] 19 First compartment

[0164] 20 Second compartment

[0165] 21 Connecting opening

[0166] 22 Space (sealed by the seal during expansion)

[0167] 23 Another pressure chamber

[0168] 24 Axial structural space

[0169] 25 Outer side

[0170] 26 Radial space requirement

[0171] 27 Stop for adjusting the (first) end position of the drive

[0172] 28 Stop for adjusting the (other) end position of the drive

[0173] 29 First end position switch

[0174] 30 Second end position switch

[0175] 31 Self-locking transmission

[0176] 32 Spindle drive

[0177] 34 Support point

[0178] 35 Coupling point

[0179] 36 Locking device

[0180] 37 Lever

[0181] 38 Electromagnet

[0182] 39 Return element

[0183] 40 (Third, other) end position switch

[0184] 41 (First, fixed) actuating element

[0185] 42 (Second, movable) actuating element

[0186] 43 Cam

[0187] 44 Roller

[0188] 45 Central axis

[0189] 46 Spring accumulator

[0190] 47 Belleville spring

[0191] 48 Groove

Claims

1. Adjusting drive (1), having: a motor (2); an output device (4) that can be driven by the motor (2) and can be coupled to a fitting; and an emergency drive (5) with an energy accumulator (6), by means of which the output device (4) can be driven instead of the motor (2), Among them, the energy accumulator (6) is a pneumatic energy accumulator (7), and the energy accumulator (6) includes a pressure chamber (8) having an expandable volume, wherein, during operation of the emergency drive, the expansion movement of the pressure chamber (8) can be guided onto the output device (4), characterized in that the energy accumulator (6) can be loaded by the motor (2) by manipulating the motor (2) towards an end position of the adjusting drive (1), and the emergency drive (5) and the motor (2) are coupled to each other such that the correspondingly generated torque and / or force are superimposed at the output device (4).

2. The adjustment drive (1) according to claim 1, characterized in that, The pressure chamber (8) can be operated in a sealed manner during operation.

3. The adjustment drive (1) according to claim 1, characterized in that, The energy accumulator (6) is connected to a monitoring device (12) which is designed to monitor the operating pressure (13) of the energy accumulator (6), and / or the energy accumulator (6) is connected to a filling device (14) which is designed to increase the operating pressure (13) of the energy accumulator (6) by supplying air.

4. The adjustment drive (1) according to claim 1, characterized in that, The energy accumulator (6) has at least one pressure chamber (8) which is delimited by at least one tank (16) and at least one piston (17) movably guided in the tank (16), and a seal (18) is constructed between the piston (17) and the tank (16), and the seal divides the pressure chamber (8) into two fluid-connected sub-chambers by its position.

5. The adjustment drive (1) according to claim 4, characterized in that, One of the two sub-chambers (19, 20) of the pressure chamber (8) is constructed in the piston (17) and / or one of the two sub-chambers (19, 20) of the pressure chamber (8) is constructed in the tank (16).

6. The adjustment drive (1) according to claim 1, characterized in that Another pressure chamber (23) is fluid-connected to the pressure chamber (8), the other pressure chamber (23) surrounds the pressure chamber (8), and / or the other pressure chamber (23) is delimited by the outer side (25) of the tank (16).

7. The adjustment drive (1) according to claim 6, characterized in that, The other pressure chamber (23) is fluid-connected to the tank (16) of the pressure chamber (8).

8. The adjustment drive (1) according to claim 1, characterized in that, The energy accumulator (6) has two actuating elements that can be pressed together towards each other against a return force.

9. The adjustment drive (1) according to claim 1, characterized in that, The emergency drive (5) and the motor (2) are arranged in series with respect to the output device (4), the emergency drive (5) is arranged in the transmission system between the motor (2) and the output device (4), and / or the emergency drive (5) and the motor (2) are arranged in parallel with respect to the output device (4).

10. The adjustment drive (1) according to claim 1, characterized in that, The motor (2) is drivingly connected to the output device (4) via a self-locking transmission (31).

11. The adjustment drive (1) according to claim 10, characterized in that, The motor (2) is drivingly connected to the coupling point (35) of the motor (2) and the emergency drive via a self-locking transmission (31).

12. The adjustment drive (1) according to claim 1, characterized in that, The energy accumulator (6) has a detector by means of which the loaded state of the energy accumulator (6) can be detected.

13. The adjustment drive (1) according to claim 1, characterized in that, The energy accumulator (6) has a locking device (36) by means of which unloading of the energy accumulator (6) can be prohibited.

14. The adjustment drive (1) according to claim 1, characterized in that, The output device (4) is a rotary and / or translational output device (4).

15. A method for operating an adjusting drive (1) according to claim 1, characterized in that, The adjusting drive (1) is moved towards the end stop by means of the motor (2), and the motor (2) is run until the accumulator (6) of the emergency drive (5) is charged. The accumulator (6) is charged by means of the motor (2) by actuating the motor (2) towards the end position of the adjusting drive (1), and the emergency drive (5) and the motor (2) are coupled to one another such that the torques and / or forces generated accordingly are superimposed at the output device (4).

16. The method according to claim 15, wherein The motor (2) is switched off when the charged state of the accumulator (6) is detected, and / or the discharging of the accumulator (6) is automatically prohibited in the charged state.

17. The method according to claim 15, characterized in that, The accumulator (6) is continuously discharged during the operation of the emergency drive until the end position switch (29) of the adjustment path of the adjusting drive (1) is actuated, and / or in order to charge the accumulator (6), at least one actuating element of the accumulator (6) is moved along its adjustment path during normal operation, and the return force of the accumulator (6) acts on the at least one actuating element.

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