CN217824602U

CN217824602U - Geared motor and system having an electronic control device and a geared motor

Info

Publication number: CN217824602U
Application number: CN202221389469.5U
Authority: CN
Inventors: 高琼华
Original assignee: Sew Tianjin Transmission Equipment Co ltd
Current assignee: Sew Tianjin Transmission Equipment Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-11-15
Anticipated expiration: 2032-06-06

Abstract

The utility model relates to a gear motor, it has reduction gear and motor, wherein, the rotor shaft of motor with the first tooth spare of reduction gear, especially pinion or gear are connected with the mode of can not relative rotation, wherein, first tooth spare and second tooth spare meshing and/or joint, wherein, the second tooth spare is connected with the jackshaft with the mode of can not relative rotation, and this jackshaft rotationally supports in the reduction gear with the help of first bearing and second bearing, and wherein, the first stopper that is used for braking the jackshaft is arranged on one side that the reduction gear deviates from the motor, wherein, arranges the second stopper that is used for braking the rotor shaft between motor and reduction gear. The utility model discloses still relate to a system with electronic control device and gear motor.

Description

Geared motor and system having an electronic control device and a geared motor

Technical Field

The utility model relates to a gear motor and a system with electronic control device and gear motor.

Background

It is generally known to arrange a brake on an electric machine in order to brake the electric machine.

SUMMERY OF THE UTILITY MODEL

The object of the invention is therefore to improve the safety during braking.

According to the utility model discloses, the purpose can be realized according to gear motor as follows characteristic.

An important feature of the invention is that the geared motor has a reduction gear and a motor, wherein the rotor shaft of the motor is connected in a rotationally fixed manner to a first toothing, in particular a pinion or a gear, of the reduction gear, wherein the first toothing meshes with and/or engages with a second toothing, wherein the second toothing is connected in a rotationally fixed manner to an intermediate shaft which is rotatably supported in the reduction gear by means of a first bearing and a second bearing, wherein a first brake for braking the intermediate shaft is arranged on the side of the reduction gear facing away from the motor, wherein a second brake for braking the rotor shaft is arranged between the motor and the reduction gear.

The advantage here is that the second brake can be used redundantly. That is, during the release of the second brake, although the first brake receives the activation command, the second brake may be activated after the failure of the first brake is recognized. Thus, safety is improved.

In normal operation, the first brake is also operated at a lower rotational speed, since the first brake does not act on the rotor shaft, but on the intermediate shaft, the rotational speed of which is reduced as a function of the transmission ratio of the first gear stage. Although the torque is correspondingly greater, the rotational speed is lower. With a suitable choice of the material of the brake pad arranged on both axial sides of the respective brake pad support/brake lining carrier, a lower wear can thus be achieved, in particular at the same braking power.

Alternatively, however, both brakes can also be activated simultaneously, so that an increased braking torque can be achieved.

In the event of a failure of the first transmission stage, in particular, for example, in the event of a failure of the toothing of the input pinion, the braking action of the second brake is no longer important for the output shaft of the reduction gear. However, according to the invention, the braking action of the first brake is still important for the output shaft of the retarder. The first brake furthermore prevents overloading by means of the second gear stage and, if appropriate, a higher gear stage.

With suitable dimensioning, the first brake and the second brake are of the same size, in particular can be embodied with the same nominal braking torque.

However, the brake is preferably also operated as a parking brake, i.e. at zero rotational speed or for braking a very low rotational speed of approximately zero, for which the transmission ratio of the first gear stage is still effective.

In an advantageous embodiment, the housing of the gear unit has a lower part and a cover connected thereto, in particular wherein a face seal is provided between the lower part and the cover, in particular wherein the gear unit is designed to be explosion-proof. The advantage here is that the highest possible protection level, i.e. safety, can be achieved.

In an advantageous embodiment, the first bearing is accommodated in the lower part and the second bearing is accommodated in the cover part, wherein the inner ring of the first bearing is slipped onto the intermediate shaft and the inner ring of the second bearing is also slipped onto the intermediate shaft. The advantage here is that the bearing arrangement is formed in two different parts. Therefore, simple assembly can be achieved at the time of manufacture. However, the first detent must be very accurately oriented with respect to the cover, which must also be very accurately oriented with respect to the lower component.

For this precise orientation, the ground flat annular surface on the outer side of the cover part is oriented with high precision relative to the bearing seat of the second bearing. Advantageously, the cutting of the cover is carried out in a single clamping operation in a machine tool for this purpose, even if the torus is arranged on the outside of the cover and the bearing receptacle is arranged on the inside of the cover.

In an advantageous embodiment, the output shaft of the gear unit is spaced apart from the intermediate shaft and the rotor shaft, in particular wherein the intermediate shaft is oriented parallel to the output shaft. The advantage here is that the reduction gear is embodied as a parallel shaft reduction gear.

In an advantageous embodiment, the only shaft passing through the cover is the intermediate shaft. The advantage here is that the region of the projecting shaft is surrounded by a first brake in a housing-forming manner, which first brake is implemented with a high protection rating and is connected in a sealing manner to the retarder, in particular also with a high protection rating.

In an advantageous embodiment, a third gear is connected in a rotationally fixed manner to the output shaft, which third gear is coupled to a gearwheel which is connected in a rotationally fixed manner to the intermediate shaft. The advantage here is that the output shaft transmits high torques.

In an advantageous embodiment, the housing of the first brake is connected to the cover and/or the housing of the second brake is connected on the one hand to the lower part and on the other hand to a housing part, in particular a flange part, of the electric machine. The advantage here is that the reaction torque of the first brake is transmitted to the cover and the reaction torque of the second brake is transmitted to the lower part, i.e. to a part different from the cover. Thus, the two components are not overloaded by the reaction moment and the stiffness is reliable. This helps to improve safety because failure of the components can be prevented.

In an advantageous embodiment, a fan guard is fastened to the housing of the electric machine on the side of the electric machine facing away from the second brake in the axial direction, wherein the fan guard surrounds the fan connected to the rotor shaft in a rotationally fixed manner. The advantage here is that the second brake can be embodied completely enclosed by its housing. Thus, the air flow of the fan can be directed directly onto the motor without having to traverse an encapsulated, in particular explosion-proof, brake to reach the motor. Overheating can thus be avoided and safety is thereby increased.

In an advantageous embodiment, the first brake has a first brake shoe support, wherein the first brake shoe support has an internal toothing, wherein a first annular driver is fitted onto the intermediate shaft and is connected in a rotationally fixed manner to the intermediate shaft, in particular by means of a key connection, wherein the first brake shoe support is fitted onto the first driver in such a way that: bringing the inner toothing into engagement with the outer toothing so that the first brake shoe support is connected in a rotationally fixed manner to the first driver and can be moved in the axial direction relative to the first driver, wherein the first magnet is connected, in particular fixedly connected, to the housing of the first brake, or the first magnet and the housing of the first brake are formed together in one piece, wherein the housing of the first brake is connected to the cover of the retarder, wherein the first armature plate is arranged axially between the first brake shoe support and the first magnet, wherein the first armature plate is connected in a rotationally fixed manner to the first magnet and is provided so as to be movable in the axial direction relative to the first magnet, wherein, a first spring element, in particular a first spring element, which is uniformly spaced apart from one another in the circumferential direction, which is supported on the first magnet, is pressed against the first armature plate, wherein the first winding is received in the first magnet, in particular wherein the first winding, in particular the ring winding, is received in a first ring recess of the first magnet and/or is connected in a material-locking manner in the first magnet, wherein, on the side of the first brake shoe support facing away from the first armature plate, a first braking surface is formed on the housing of the first brake, in particular on the inner side of the housing of the first brake, in particular wherein the first bolts which are fastened to the first magnet each pass through a corresponding cutout of the first armature plate, in particular wherein the first brake shoe support has a brake shoe on each axial side. The advantage here is that the first brake is automatically engaged when the power supply is switched off. Furthermore, the first brake can be actuated electromagnetically and can therefore be controlled simply by the electronic control device.

In an advantageous embodiment, the second brake has a second brake shoe support, wherein the second brake shoe support has an internal toothing, wherein the second annular driver is mounted on the intermediate shaft and is connected to the intermediate shaft in a rotationally fixed manner, in particular by means of a key connection, wherein the second brake shoe support is mounted on the second driver in such a way that: such that the inner toothing meshes with the outer toothing, so that the second brake shoe support part is connected in a rotationally fixed manner to the second catch and can be moved in the axial direction relative to the second catch, wherein a second magnet is connected, in particular fixedly connected, to the housing of the second brake, or the second magnet and the housing of the second brake are embodied together in one piece, wherein the housing of the second brake is connected to the lower part of the retarder, wherein a second armature plate is arranged axially between the second brake shoe support part and the second magnet, wherein the second armature plate is connected in a rotationally fixed manner to the second magnet and is arranged so as to be movable in the axial direction relative to the second magnet, wherein, a second spring element, in particular a second spring element which is uniformly spaced apart from one another in the circumferential direction, which is supported on the second magnet, is pressed against the second armature plate, wherein the second winding is received in the second magnet, in particular wherein the second winding, in particular an annular winding, is received in a second annular recess of the second magnet and/or is connected in a material-locking manner in the second magnet, wherein, on the side of the second brake shoe support facing away from the second armature plate, a second braking surface is formed on the housing of the second brake, in particular on the inner side of the housing of the second brake, in particular wherein the second bolt fixed to the second magnet passes through a corresponding cutout of the second armature plate, in particular wherein the second brake shoe support has brake shoes on both axial sides. The advantage here is that the second brake is automatically engaged when the power supply is switched off. Furthermore, the second brake can be actuated electromagnetically and can therefore be controlled simply by the electronic control device.

In an advantageous embodiment, the first brake can be actuated electromagnetically, so that when the first winding is energized, the first armature plate is pulled against the spring force generated by the first spring element toward the first magnet, and when the first winding is not energized, the first spring element presses the first armature plate toward the first brake shoe support, which is thus pressed against the first braking surface. The advantage here is that the first brake is automatically engaged when the power supply is switched off. Furthermore, the first brake can be electromagnetically actuated and can therefore be easily controlled by the electronic control device.

In an advantageous embodiment, the second brake can be actuated electromagnetically, so that when the second winding is energized, the second armature plate is pulled against the spring force generated by the second spring element toward the second magnet, and when the second winding is de-energized, the second spring element presses the second armature plate against the second brake shoe support, which is thus pressed against the second braking surface. The advantage here is that the second brake is automatically engaged when the power supply is switched off. Furthermore, the second brake is electromagnetically actuable and can therefore be controlled simply by the electronic control device.

In an advantageous embodiment, a flat surface is formed on the outside of the gear unit, in particular on or on the cover, which flat surface is embodied as a ring and into which an axial bore is formed, in particular a screw is screwed, the head of which presses the housing of the first brake against the cover. The advantage here is that the flat surface can be produced with high precision relative to the bearing seat of the second bearing, in particular in a single clamping operation in a machine tool. The flat surface can be ground flat and is therefore suitable for bearing precisely against the housing of the first brake, which can therefore likewise be oriented precisely.

An important feature in a system having an electronic control unit and a geared motor is that the electronic control unit is connected to the first brake by means of a first electrical signal line, wherein the electronic control unit is connected to the second brake by means of a second electrical signal line, in particular wherein the electronic control unit is suitably designed such that, when the second brake is released, a drop in the rotational speed of the rotor shaft is monitored after the first brake is activated, and that, when the extent of the drop in the rotational speed is not allowed or when the rotational speed remains unchanged or when the rotational speed rises, the second brake is additionally activated, in particular wherein the electronic control unit is arranged in a converter which feeds the motor. The advantage of this is that the safety is increased, since the second brake is available in the event of a failure of the first brake. It is also important here that the first brake is also active even in the event of a failure of the first transmission ratio stage.

In an advantageous embodiment, the means for detecting the motor current of the electric motor and the means for determining the motor voltage of the electric motor are connected to an electronic control device, in particular, the electronic control device being expediently designed to determine, from the detected motor current and motor voltage values, a value of the torque output by the electric motor via the rotor shaft to the reduction gear. The advantage here is that the rotational speed can also be determined from the detected values without a sensor. Alternatively or additionally, however, means for determining the rotational speed, in particular sensors, may also be provided in the electric machine and may be connected to the electronic control unit.

The present invention is not limited to the above feature combinations. The above-described combinations of features and/or other possible combinations of individual features described above and/or of features described below and/or of features of the drawings are apparent to the person skilled in the art, especially from the object set forth and/or by comparison with the prior art.

Drawings

The invention will now be explained in detail with the aid of the schematic drawings:

fig. 1 shows a gear motor according to the invention in a side view.

Fig. 2 shows the cover 2 of the geared motor in an oblique view.

List of reference numerals:

1 first brake

2 cover part

3 lower part

4 output shaft

5 second brake

6 electric machine

7 blower fan cover

20 intermediate shaft

Detailed Description

As shown, the geared motor has an electric motor 6, which is connected to a reduction gear of the geared motor via an intermediately arranged second brake 5.

A first brake 1 is arranged on the side of the retarder facing away from the second brake 5 and is connected to the retarder.

The electric motor 6 has, in particular on its side facing away from the second brake 5, a fan guard 7 which surrounds a fan connected to the rotor shaft of the electric motor 6 in a rotationally fixed manner. The fan has fan blades, so that the fan delivers an air flow when the rotor shaft rotates, which air flow flows along the housing of the electric machine.

The housing of the gear unit has a lower part 3, to which a cover 2 is mounted and connected to the lower part 3.

The rotor shaft of the electric motor 6 projects through the lower part 3 into the interior of the gear unit and is connected there in a rotationally fixed manner to a toothed or pinion which engages with a toothed wheel which is connected in a rotationally fixed manner to the intermediate shaft 20.

The intermediate shaft 20 is rotatably supported by means of bearings received in the housing of the gear unit. For this purpose, in particular a first bearing is accommodated in the lower part 3 and a second bearing is accommodated in the cover 2, wherein the inner ring of the first bearing is placed over the intermediate shaft 20 and the inner ring of the second bearing is also placed over the intermediate shaft.

Preferably, the rotor shaft is rotatably supported not only in the electric machine 6 but also by means of bearings received in the lower part 3.

The intermediate shaft 20 has a rotational speed which is less than the rotational speed of the rotor shaft. In particular, the transmission ratio of the first transmission stage, which is formed by a gearwheel connected to the intermediate shaft and a pinion or gearwheel connected to the rotor shaft in a rotationally fixed manner, is greater than 1.

The intermediate shaft 20 is connected in a rotationally fixed manner to a further gearwheel which is in engagement with a gearwheel which is connected in a rotationally fixed manner to the output shaft 4.

The axis of rotation of the intermediate shaft 20, although oriented parallel to the axis of rotation of the rotor shaft, is at the same time not at zero, i.e. a finite value, spacing between the axis of rotation of the intermediate shaft 20 and the axis of rotation of the rotor shaft.

The second brake 5 has a housing which is connected on the one hand to a housing part, in particular a flange part, of the electric motor 6 and on the other hand to the lower part 3 of the gear unit.

The first brake 1 has a housing which is connected to a cover 2 of the gear unit.

The second brake 5 has a brake shoe support, in particular a disc-shaped brake shoe support, which has internal teeth. The brake shoe support is mounted on an annular driver with external teeth. The internal teeth portions engage the external teeth portions. The driver is fitted onto the rotor shaft and is connected in a rotationally fixed manner to the rotor shaft, in particular by means of a key connection.

The brake shoe support is therefore connected to the rotor shaft in a rotationally fixed manner and is arranged so as to be displaceable in the axial direction, in particular parallel to the axis of rotation of the rotor shaft.

The second brake 5 has a braking surface which is fixedly connected to the housing of the second brake.

An armature plate is arranged on the side of the brake shoe carrier, which is preferably provided with brake shoes on both axial sides, facing away from the braking surface in the axial direction, i.e. in particular in the axial direction, and is connected to the magnet in a rotationally fixed manner and is arranged so as to be axially displaceable. For this purpose, pins are fixed in the magnet, which pins extend through the openings of the armature plate.

The magnet is arranged on the side of the brake shoe support facing away from the braking surface. An armature plate is disposed axially between the magnet and the brake shoe support. The brake shoe support is axially disposed between the armature plate and the braking surface.

An annular recess is formed in the magnet, in which recess an energizable annular winding is accommodated and connected to the magnet in a material-locking manner. The ring axis of the ring winding is oriented coaxially with the rotational axis of the rotor shaft.

The magnet is connected to the housing of the second brake 5, in particular in a rotationally fixed manner, or alternatively is formed in one piece, in particular in one piece.

The brake is therefore designed as an electromagnetically actuable brake. When the ring winding is energized with a unipolar current, the armature plate is pulled toward the magnet against a spring force exerted by the spring force on the magnet and pressing on the armature plate. In particular, the brake is released, i.e. the brake shoe support can rotate freely with the rotor shaft.

When not energized, the spring element presses the armature plate away from the magnet towards the brake shoe support, thus pressing the brake shoe support against the brake surface. In particular, the brake is then engaged accordingly.

The first brake 1 also has a braking surface which is fixedly connected to the housing of the first brake 1.

On the side of the brake shoe carrier of the first brake 1, which brake shoe carrier is preferably provided with brake shoes on both axial sides, facing away from the braking surface of the first brake 1 in the axial direction, i.e. in particular in the axial direction, an armature plate of the first brake 1 is arranged, which armature plate is connected in a rotationally fixed manner to the magnets of the first brake 1 and is arranged so as to be axially displaceable. For this purpose, pins are fixed in the magnets of the first brake 1, which pins extend through openings in the armature plate of the first brake 1.

The magnets of the first brake 1 are arranged on the side of the pad support of the first brake 1 facing away from the braking surface of the first brake 1. The armature plate of the first brake 1 is arranged axially between the magnet of the first brake 1 and the brake shoe support of the first brake 1. The pad support of the first brake 1 is arranged axially between the armature plate of the first brake 1 and the braking surface of the first brake 1.

An annular recess is formed in the magnet of the first brake 1, in which recess the energizable annular winding of the first brake 1 is accommodated and connected to the magnet of the first brake 1 in a material-locking manner. The ring axis of the ring winding of the first brake 1 is oriented coaxially to the rotational axis of the intermediate shaft 20.

The magnet of the first brake 1 is connected to the housing of the first brake 1, in particular in a rotationally fixed manner, or alternatively is formed in one piece, in particular in one piece.

The first brake 1 is thus designed as an electromagnetically actuable brake. When the ring winding of the first brake 1 is energized with a unipolar current, the armature plate of the first brake 1 is pulled against the magnet of the first brake 1 against a spring force exerted by the magnet supported on the first brake 1 and pressing on the armature plate of the first brake 1. In particular, the first brake 1 is therefore released, i.e. the brake shoe support of the first brake 1 can rotate freely together with the rotor shaft of the first brake 1.

The spring element of the first brake 1 presses against the armature plate of the first brake 1 and is supported on the magnet of the first brake 1.

When not energized, the spring element of the first brake 1 presses the armature plate of the first brake 1 away from the magnet of the first brake 1 towards the pad support of the first brake 1, thus pressing the pad support against the braking surface of the first brake 1. In particular, the first brake 1 is then engaged.

Preferably, the first brake 1, the second brake 5, the electric motor 6 and/or the retarder are embodied explosion-proof.

For mounting the first brake 1, the cover 2 of the gear unit has a flat surface in which an axial bore is formed for the insertion of a screw, the head of which presses the housing of the first brake 1 against the cover 2. Furthermore, the flat surface is finished, in particular ground. A face seal arranged between the housing of the first brake 1 and the flat face seals the first brake 1 with respect to the retarder.

The flat surface is embodied as a circular ring, in particular, wherein a bore is machined into the circular ring.

The electric machine is supplied with current by a converter having an electronic control unit which determines the rotational speed of the rotor shaft. This determination may be implemented using sensors provided in the motor 6. Alternatively or additionally, the rotational speed can be determined from the detected motor current value and the motor voltage value by: the rotational speed of the rotor shaft is estimated and/or determined from the determined motor current and voltage profiles according to a model.

When the braking process is activated, the first brake 1 is first activated by the electronic control unit by means of a control signal, while the second brake 5 remains released. By monitoring the rotational speed of the rotor shaft by means of the electronic control device, the braking effect, that is to say the reduction in rotational speed, can then be checked.

However, if the electronic control unit does not recognize a reduction in the rotational speed, the first brake 1 is considered to be deactivated, so that the second brake 5 is also activated, which then brakes the rotor shaft more directly than the first brake 1. Thus, improved safety is achieved. Of course, the explosion-proof embodiment of the brakes 1 and 5 also contributes further to increased safety.

In a further exemplary embodiment according to the invention, the gear unit also has a further gear stage and/or the rotor shaft is not designed in one piece, but in multiple parts, in particular in two parts, in particular wherein the multiple parts, in particular the two parts, are arranged axially one behind the other.

Claims

1. A reduction motor has a reducer and a motor,

the rotor shaft of the motor is connected with the first gear of the speed reducer in a non-rotatable manner,

the first tooth member meshes or engages with the second tooth member,

the second gear part is connected in a rotationally fixed manner to an intermediate shaft, which is rotatably mounted in the gear unit by means of a first bearing and a second bearing,

it is characterized in that the preparation method is characterized in that,

a first brake for braking the intermediate shaft is arranged on the side of the retarder facing away from the motor,

a second brake for braking the rotor shaft is arranged between the electric motor and the retarder.

2. The geared motor of claim 1, wherein the first gear is a pinion gear.

3. The reduction motor according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the housing of the gear unit has a lower part and a cover connected to the lower part.

4. The geared motor of claim 3,

a face seal is disposed between the lower member and the cover member.

5. The geared motor of claim 3,

the retarder is embodied explosion-proof.

6. The reduction motor in accordance with claim 3,

it is characterized in that the preparation method is characterized in that,

the first bearing is accommodated in the lower member, the second bearing is accommodated in the cover member,

the inner ring of the first bearing is fitted over the intermediate shaft, and the inner ring of the second bearing is also fitted over the intermediate shaft.

7. The reduction motor in accordance with claim 3,

it is characterized in that the preparation method is characterized in that,

the output shaft of the reducer is spaced from the intermediate shaft and the rotor shaft,

the intermediate shaft is parallel to the rotor shaft,

the intermediate shaft is parallel to the output shaft.

8. The reduction motor in accordance with claim 7,

it is characterized in that the preparation method is characterized in that,

the only shaft passing through the cover is the intermediate shaft.

9. The geared motor according to claim 7,

it is characterized in that the preparation method is characterized in that,

the third gear member connected to the output shaft in a relatively non-rotatable manner is engaged to the gear connected to the intermediate shaft in a relatively non-rotatable manner.

10. The reduction motor in accordance with claim 3,

it is characterized in that the preparation method is characterized in that,

the housing of the first actuator is connected to the cover member,

and/or

The housing of the second brake is connected on the one hand to the lower part and on the other hand to the housing part of the electric machine.

11. The geared motor of claim 10, wherein the housing component of the motor that is connected to the housing of the second brake is a flange component.

12. The geared motor according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

on the side of the electric machine facing away from the second brake in the axial direction, the fan guard is fixed on the housing of the electric machine,

the fan guard surrounds a fan which is connected to the rotor shaft in a rotationally fixed manner.

13. The reduction motor in accordance with claim 3,

it is characterized in that the preparation method is characterized in that,

the first brake has a first brake shoe support member,

the first brake shoe support has an internal tooth portion,

an annular first driver is fitted onto the intermediate shaft and is connected to the intermediate shaft in a rotationally fixed manner,

the first brake shoe support member is sleeved onto the first driver in a manner that: engaging the inner teeth with the outer teeth such that the first brake shoe support member is non-rotatably connected with and movable in an axial direction relative to the first driver,

a first magnet is coupled to the housing of the first actuator,

or the first magnet and the housing of the first actuator are formed together in one piece,

the housing of the first brake is connected with the cover of the speed reducer,

a first armature plate is arranged axially between the first brake shoe support and the first magnet,

the first armature plate is connected to the first magnet in a relatively non-rotatable manner and is arranged so as to be movable in the axial direction relative to the first magnet,

a first spring element supported on the first magnet presses against the first armature plate,

the first winding is received in the first magnet,

on the side of the first brake shoe support facing away from the first armature plate, a first braking surface is formed on the inner side of the housing of the first brake,

the first bolts fixed on the first magnet respectively pass through the corresponding notches of the first armature plate,

the first brake shoe support has brake shoes on both axial sides, respectively.

14. The reduction motor of claim 13, wherein the first driver is connected to the intermediate shaft by a keyed connection.

15. The geared motor of claim 13, wherein the first magnet and the housing of the first brake are fixedly coupled.

16. The geared motor of claim 13, wherein the plurality of first spring elements are evenly circumferentially spaced from one another.

17. Geared motor according to claim 13, characterized in that the first winding is a ring winding which is received in a first ring recess of the first magnet and/or is connected in a material-locking manner in the first magnet.

18. The reduction motor in accordance with claim 13,

it is characterized in that the preparation method is characterized in that,

the second brake has a second brake shoe support,

the second brake shoe support has an internal tooth portion,

a second endless driver is mounted on the intermediate shaft and is connected to the latter in a rotationally fixed manner,

the second brake shoe support member is sleeved onto the second driver in such a manner that: engaging an inner tooth portion of a second brake shoe support with an outer tooth portion such that the second brake shoe support is connected in a relatively non-rotatable manner with the second driver and is movable in an axial direction relative to the second driver,

a second magnet is coupled to the housing of the second actuator,

or the second magnet and the housing of the second actuator are implemented together in one piece,

the housing of the second brake is connected with the lower part of the speed reducer,

a second armature plate is disposed axially between the second brake shoe support and the second magnet,

the second armature plate is connected to the second magnet in a relatively non-rotatable manner and is arranged so as to be movable in the axial direction relative to the second magnet,

a second spring element supported on the second magnet presses against the second armature plate,

the second winding is received in the second magnet,

on the side of the second brake shoe support part facing away from the second armature plate, a second braking surface is formed on the inner side of the housing of the second brake,

the second bolt pieces fixed on the second magnet respectively pass through the corresponding gaps of the second armature sheet,

the second brake shoe support has brake shoes on both axial sides, respectively.

19. The geared motor of claim 18, wherein the second driver is connected to the intermediate shaft by a keyed connection.

20. The geared motor of claim 18, wherein the second magnet and the housing of the second brake are fixedly coupled.

21. The geared motor of claim 18, wherein the plurality of second spring elements are evenly circumferentially spaced from one another.

22. A geared motor according to claim 18, wherein the second winding is an annular winding, the second winding being received in a second annular recess of the second magnet and/or being connected in a material-locking manner in the second magnet.

23. The reduction motor in accordance with claim 13,

it is characterized in that the preparation method is characterized in that,

the first brake can be operated in an electromagnetic manner,

such that when the first winding is energized the first armature plate is drawn towards the first magnet against the spring force generated by the first spring element, and when the first winding is de-energized the first spring element presses the first armature plate towards the first brake shoe support member, which is thus pressed against the first braking surface.

24. The reduction motor in accordance with claim 18,

it is characterized in that the preparation method is characterized in that,

the second brake can be operated in an electromagnetic manner,

so that when the second winding is energized the second armature plate is pulled towards the second magnet against the spring force generated by the second spring element, and when the second winding is not energized the second spring element presses the second armature plate towards the second brake shoe support, which is thus pressed against the second braking surface.

25. The reduction motor in accordance with claim 3,

it is characterized in that the preparation method is characterized in that,

on the outside of the cover, a flat surface is formed, which is embodied as a ring, in which an axial bore is machined,

a screw is screwed into the axial bore, the screw head of which presses the housing of the first brake against the cover.

26. A system having an electronic control device and a gearmotor according to any one of claims 1 to 25,

it is characterized in that the preparation method is characterized in that,

the electronic control device is connected to the first actuator by means of a first electrical signal line,

the electronic control device is connected to the second brake by means of a second electrical signal line,

the electronic control unit is suitably designed such that after activation of the first brake with the second brake released, it is monitored whether the rotational speed of the rotor shaft has dropped and, if the drop is not permitted to a small extent, or if the rotational speed remains the same, or if the rotational speed has increased, the second brake is additionally activated.

27. The system of claim 26,

the electronic control unit is arranged in a converter feeding the electric machine.

28. The system according to claim 26 or 27,

it is characterized in that the preparation method is characterized in that,

the means for detecting the motor current of the motor and the means for determining the motor voltage of the motor are connected to the electronic control means,

the electronic control unit is suitably designed to determine, from the detected motor current value and motor voltage value, a value for the torque output by the motor to the reduction gear via the rotor shaft.