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CN-115699534-B - Drive device with an electric motor provided with a brake assembly

CN115699534BCN 115699534 BCN115699534 BCN 115699534BCN-115699534-B

Abstract

The invention relates to a drive device having an electric motor provided with a brake assembly, wherein the electric motor has a housing part and a rotor rotatably supported by a first bearing and a second bearing, wherein the first bearing has an inner ring and an outer ring, wherein the inner ring of the first bearing is received, in particular is slipped, onto the rotor and in particular against a step or is pressed against a driver which is formed on the rotor, wherein the brake assembly has a magnet, in particular a magnet made of ferromagnetic material, and wherein the outer ring of the first bearing is received in the magnet of the brake assembly and in particular against the step.

Inventors

  • K. Wilking

Assignees

  • 索尤若驱动有限及两合公司

Dates

Publication Date
20260508
Application Date
20210519
Priority Date
20200604

Claims (13)

  1. 1. A drive device having an electric motor provided with a brake assembly, The motor has a housing part and a rotor rotatably supported by a first bearing and a second bearing, The first bearing has an inner race and an outer race, The inner ring of the first bearing is sleeved on the rotor or pressed against the driving piece which is abutted against the step part formed at the rotor, The brake assembly has a magnet made of ferromagnetic material, It is characterized in that the method comprises the steps of, The outer race of the first bearing is received in a magnet of the brake assembly, The magnet is received in a receiver fixedly connected to the housing part or is accommodated in the housing part, The magnet is arranged to be movable in the axial direction and is connected to the first torque support, The first torque support is connected to the receiver and/or the housing member, The first torque support is embodied as a bellows, wherein the region of the first torque support contacting the receiver is spaced apart from the region of the contact magnet in the axial direction, which is arranged at a smaller radial distance than the region of the contact receiver, Or alternatively The first torque support is embodied as a plate such that the region of the first torque support that contacts the receiver is arranged at the same axial position as the region of the torque support that is contacted by the magnet, which is arranged at a smaller radial distance than the region that contacts the receiver.
  2. 2. The driving device according to claim 1, wherein, The outer race of the second bearing is received in the housing or in a flange member connected to the housing member, The inner ring of the second bearing is sleeved on the rotor.
  3. 3. Drive device according to claim 1 or 2, characterized in that, The armature plate and the driver are arranged so as to be relatively non-rotatable but movable in the axial direction, The spring element arranged between the driver and the armature plate is designed as a spring plate which is connected to the driver by means of a first connecting element and to the armature plate by means of a second connecting element, which spring element generates a spring force acting on the armature plate and directed towards the driver, The spring element is supported on the driver, The first connecting element and the second connecting element are embodied as rivets.
  4. 4. Drive device according to claim 1 or 2, characterized in that, A coil is received in the magnet between the inner ring of magnets and the outer ring of magnets in the radial direction, And/or the number of the groups of groups, The magnet has an outer ring and an inner ring, Permanent magnets are arranged between the inner ring and the outer ring in the axial direction.
  5. 5. Drive device according to claim 1 or 2, characterized in that, The outer ring of the first bearing abuts against a step formed at the magnet, which is formed at the inner ring of the magnet, The inner race of the first bearing abuts against a step formed on the shaft.
  6. 6. A driving device according to claim 3, characterized in that the magnetic flux through the armature plate is reduced when the coil is supplied with power compared to when the coil is not supplied with power.
  7. 7. The drive of claim 4, wherein the outer ring of magnets is axially movably disposed in the receiver.
  8. 8. Drive device according to claim 1 or 2, characterized in that, The rotor shaft of the angle sensor is connected to the rotor in a rotationally fixed manner, the housing of the angle sensor is connected to a first region of a second torque support, wherein a second region of the second torque support is connected to the inner ring of the magnet, the second region of the second torque support is pressed together with the auxiliary plate against the inner ring of the magnet by means of screws, The second region is arranged at a larger radial distance than the first region, the second region being arranged radially further outward than the first region.
  9. 9. A drive arrangement according to claim 8, characterized in that the radial extent covered by the first torque support is spaced apart from the radial extent covered by the second torque support and/or the radial extent covered by the first torque support is arranged radially outside the radial extent covered by the second torque support.
  10. 10. Drive device according to claim 1 or 2, characterized in that, The first torque support has an inner ring region, an outer ring region and a bridge connecting the inner ring region and the outer ring region, The inner ring region rests against the inner ring of the magnet, while the outer ring region rests against the receiver or housing part, Therein, or The maximum circumferential angle value of the circumferential angle range covered by the respective bridge at a radial distance increases strictly monotonically with increasing radial distance, And the minimum circumferential angle value of the circumferential angle range increases strictly monotonically with increasing radial distance, Or alternatively The maximum circumferential angle value of the circumferential angle range covered by the respective bridge at a radial distance decreases strictly monotonically with increasing radial distance, The minimum circumferential angle value of the circumferential angle range decreases strictly monotonically with increasing radial distance.
  11. 11. Drive device according to claim 1 or 2, characterized in that, The bellows supported on the receiver presses the inner ring of the magnet against the outer ring of the first bearing, so that the inner ring of the first bearing presses the driver against the step formed on the rotor, Or alternatively The spring element, which is supported at the receiver, at the housing part or at the ring fixedly connected to the receiver or the housing part, presses the inner ring of the magnet against the outer ring of the first bearing, so that the inner ring of the first bearing presses the driver against a step formed on the rotor.
  12. 12. The driving device according to claim 2, wherein, When the flange member and the reduction gear have not yet been connected to the housing member, the outer ring of the second bearing is received in an insulating member, which is made of a glass fiber reinforced plastic, The insulating member is received in the housing member, The flange element is arranged on the side of the insulating element facing away from the first bearing.
  13. 13. The driving device according to claim 2, wherein, A first partial region of the region covered by the outer ring of the second bearing in the axial direction contacts the flange member, A second partial region of the region covered in the axial direction by the outer race of the second bearing contacts the insulating member, The first partial region is spaced apart from or contiguous with the second partial region, and the first partial region does not overlap with the second partial region.

Description

Drive device with an electric motor provided with a brake assembly Technical Field The invention relates to a drive device with an electric motor provided with a brake assembly. Background Drive devices with an electric motor are generally known. An electromagnetic brake is known from DE 22 57 a 290A. A motor with redundant brakes is known from DE 10 2012 019 415 A1. A brake is known from DE 10 2012 010 790 A1. A braking device is known from DE 10 2013 005 239 A1. A gear motor is known from WO 2004/077 644 A2. A motor with an angle sensor is known from DE 10 2008 037 737 A1. A device for establishing a braking force transmission is known from DE 20 2016 107 420 U1. Disclosure of Invention It is therefore an object of the present invention to achieve accurate drive control. In a drive with an electric motor provided with a brake assembly, an important feature of the invention is that the electric motor has a housing part and a rotor rotatably supported by a first bearing and a second bearing, Wherein the first bearing is provided with an inner ring and an outer ring, Wherein the inner ring of the first bearing is received, in particular is fitted, on the rotor and in particular bears against the step or against the driver which bears against the step formed at the rotor, Wherein the brake assembly has a magnet/magnetic body, in particular a magnet made of ferromagnetic material, Wherein the outer ring of the first bearing is received in the magnet of the brake assembly and in particular abuts against the step. The advantage here is that precise control of the drive is achieved. Since, thanks to the two fixed bearings of the rotor, a stable angle detection with low errors is achieved at the rotor of the motor, which is configured as a drive of the gear motor, wherein the detected angle value is proportional as precisely as possible to the angle value of the output shaft. By applying a fixed bearing in the region of the angle sensor, a very accurate angle detection can thus be achieved even in the case of thermal expansion in the drive, since the distance of the first bearing, which is configured as a fixed bearing, relative to the angle sensor is much smaller than the distance between the first bearing and the second bearing. Since the second bearing of the rotor, i.e. the bearing on the speed reducer side, is likewise a fixed bearing, the sun gear with helical teeth, which is inserted into the rotor shaft during thermal expansion, is also substantially maintained in its axial position. Although the distance between the first bearing and the second bearing, in particular with respect to the housing part, changes as a result of the thermally induced length change, the sun gear does not rotate even with helical teeth and the angle sensor likewise operates undisturbed. The first bearing is received in a magnet of the brake assembly. Thus, the distance change between the first bearing and the second bearing is not compensated for by the movement of the first bearing in the magnet, but rather by the movement of the magnet relative to the receiver, i.e. relative to the housing part. In this way, an axially double-sided fixed support with stable angle detection with respect to thermal influences is thus achieved. Preferably, the rotor is made of steel and the housing part is made of aluminum. That is, according to the present invention, when the rotor and the housing member are made of different materials, an angular error can be prevented or at least reduced. In an advantageous embodiment, the second bearing, in particular the outer ring of the second bearing, is received in the housing or in a flange part connected to the housing part and in particular bears against the step. The advantage here is that the thermally induced changes in the length of the housing and/or of the rotor, in particular of the housing relative to the rotor, do not cause a torsion of the shaft of the reduction gear, even if the shaft of the reduction gear is connected in a rotationally fixed manner to the toothed parts with helical teeth that mesh with one another. In an advantageous embodiment, the inner ring of the second bearing is received, in particular is fitted, onto the rotor and in particular bears against the step. In this case, it is advantageous if the second bearing is embodied as a fixed bearing, so that the angle value detected at the rotor is proportional to the angle value of the output shaft of the reduction gear. This applies in particular to the case where the toothed component, in particular the sun gear, which is connected to the rotor in a rotationally fixed manner, is embodied with helical teeth. In an advantageous embodiment, the magnet is received in a receiving element fixedly connected to the housing part or in the housing part, Wherein the magnet is arranged to be movable in an axial direction, i.e. in particular parallel to the rotational axis of the rotor, and is connected with the first torque support, in par