Electromagnetically actuatable brake arrangement, in particular for an electric motor

Abstract

Electromagnetically actuatable brake arrangement, comprising an electrically energizable winding (1), a magnet body part (9) and an armature part (8) movable relative to the magnet body part, wherein the magnet body part is annular, wherein the magnet body part has an interruption in the circumferential direction, wherein the armature part has an interruption in the circumferential direction.

Description

[0001] Electromagnetically actuated brake assembly, especially for an electric motor

[0002] Description:

[0003] The invention relates to an electromagnetically actuated brake arrangement, in particular for an electric motor.

[0004] It is generally known that a rotatably mounted shaft can be slowed down by a braking arrangement.

[0005] From DE 102007025081 A1, a motor brake is known as the closest state of the art.

[0006] From DE 3810155 A1 an adjusting device for an electromagnetic spring pressure brake is known.

[0007] An electromagnetically released spring pressure brake is known from DE 19519434 C1.

[0008] An electromagnet is known from DE 1075740 A.

[0009] The invention is therefore based on the objective of further developing a brake arrangement in an energy-efficient and as compact a manner as possible, in particular by requiring the shortest possible axial length.

[0010] According to the invention, the problem is solved in the brake arrangement according to the features specified in claim 1.

[0011] Important features of the invention in the brake arrangement are that the electromagnetically actuated brake arrangement, in particular for an electric motor, has an electrically energizable winding, a magnetic body part and an armature part movable relative to the magnetic body part,

[0012] wherein the magnetic body part is designed in a ring shape, in particular in a ring section shape,

[0013] ISI \ EIDOPAT 11.12.2025 wherein the magnetic body part has a radially continuous interruption and / or a radially completely extending interruption in the circumferential direction and / or extends in the circumferential direction in magnitude only over less than 360°, in particular less than 355°, but in particular more than 300°,

[0014] wherein the anchor part has a radially continuous interruption and / or a radially extending interruption in the circumferential direction and / or extends in the circumferential direction only over less than 360°, in particular less than 355°, but in particular more than 300° or more than 330°.

[0015] An advantage of this is that a circumferentially directed magnetic flux can be generated in the magnet body part by the winding, which attempts to overcome the large air gap caused by the interruption by pulling the armature part towards the magnet body part and thereby bridging the interruption for the magnetic flux by means of the armature part.

[0016] It is also important that the air gap between the armature part and the magnet body part is smaller than the air gap caused by the interruption. When the armature part and the magnet body part are in contact, this air gap disappears completely.

[0017] In this way, efficient and fast operation of a brake motor according to the invention is made possible within the brake arrangement.

[0018] The compactness is achieved through the magnetic flux in the circumferential direction, because unlike an axial magnetic flux, which has to be guided back around the winding, i.e. also radially and axially, with a magnetic flux in the circumferential direction the magnetic flux is already guided back.

[0019] Because the winding is wound around the magnet body, allowing for a high number of windings with a short winding wire length, the brake can be operated energy-efficiently. In particular, this enables a high normal force on the friction material with minimal electrical power loss during holding.

[0020] In an advantageous embodiment, the ring axis of the magnet body part is aligned coaxially with the ring axis of the armature part. It is advantageous that the ring-shaped parts are arranged parallel to each other, thus allowing the parts to be manufactured identically. In an advantageous embodiment, the minimum gap width of the air gap between the armature part and the magnet body part is smaller than the minimum width of the interruption in the magnet body part, particularly in the circumferential direction. It is advantageous that bridging the air gap is made easy.

[0021] In an advantageous embodiment, the winding is wound onto and / or around the magnetic body part, particularly to generate a main magnetic flux flowing circumferentially through the magnetic body part, as part of the magnetic field generated by the winding. It is advantageous that a magnetic flux can be generated that is directed circumferentially. This allows for a simple bridging of the interruption.

[0022] In an advantageous embodiment, the area covered by the winding in the circumferential direction is contained within the area covered by the interruption in the armature part in the circumferential direction. The interruption in the armature part provides the winding with the necessary installation space.

[0023] In an advantageous embodiment, the area covered by the armature part in the axial direction is encompassed by or overlaps with the area covered by the winding in the axial direction, in particular parallel to the direction of the ring axis of the armature part. An advantage of this is that the installation space for the winding is not limited in the axial direction.

[0024] In an advantageous embodiment, the axis of rotation of a shaft to be braked in the brake assembly is aligned coaxially with the annular axis of the armature part and / or coaxially with the annular axis of the magnet body part. It is advantageous that the shaft is rotatably mounted in a bearing received in the flange part.

[0025] In an advantageous embodiment, the interruption of the armature section is arranged diametrically opposite to the interruption of the magnet body section, particularly in the circumferential direction. It is advantageous that the interruption of the magnet body section can be bridged by the armature section with respect to the magnetic flux generated by the winding.

[0026] In an advantageous embodiment, circumferentially spaced bolts are connected to a flange part having a braking surface, wherein the bolts each project through a respective first bore, in particular an axial bore, of the armature part and through a respective second bore, in particular an axial bore, of the magnet body part. It is advantageous that the magnet body part is fixed relative to the flange part, with the distance being adjustable by means of an adjusting nut.

[0027] In an advantageous embodiment, the first bore is a marginal bore, specifically, the smallest distance of the first bore to the ring axis is greater than half the difference between the outer diameter of the magnet body part and the bore diameter of the first bore. This is advantageous because the guide requires minimal space, allowing for a compact brake assembly.

[0028] In an advantageous embodiment, the second bore is a marginal bore, specifically, the smallest distance of the first bore to the ring axis is greater than half the difference between the outer diameter of the armature part and the bore diameter of the second bore. This design offers the advantage of achieving a highly compact guide, while allowing the distance of the magnetic body part to be easily adjustable and fixed.

[0029] In an advantageous embodiment, the magnetic body part is detachably connected to the flange part by means of the bolts,

[0030] The armature part is arranged to be movable relative to the magnet body part, particularly axially movable, and is connected to the magnet body part in a rotationally fixed manner. An advantage of this arrangement is that the bolts both provide the connection and act as guides for the armature disc. The brake pad carrier is arranged radially within the bolts and is therefore rotatable – unimpeded by the bolts.

[0031] In an advantageous embodiment, an annular driver is mounted on the shaft, in particular the rotor shaft of the electric motor, which has external teeth and is non-rotatably connected to the shaft, in particular by means of a keyway connection.

[0032] wherein a perforated disc-shaped brake pad carrier with its internal teeth is mounted on the driver, wherein the internal teeth are in engagement with the external teeth, wherein the brake pad carrier is rotatably connected to the driver and is axially movable on the driver,

[0033] wherein the armature part is arranged axially between the brake pad carrier and the magnet body part,

[0034] Spring elements supported on the magnetic body press against the armature. An advantage of this design is that the brake pad carrier is rotationally fixed to the shaft and is axially movable. This allows the brake pad carrier to be pressed from the armature towards the braking surface. The brake pad carrier has a brake pad on each axial side, so that when the brake pad carrier is in contact with the armature, the armature performs frictional work on the brake pad, and when the brake pad carrier is in contact with the flange, the other brake pad performs frictional work on the braking surface of the flange.

[0035] In an advantageous embodiment, when the winding is not energized, the spring elements press the armature part towards the brake pad carrier, whereby the brake pad carrier is pressed against the braking surface on its side facing away axially from the armature part.

[0036] When the winding is energized, the armature part is pulled towards the magnet body part against the spring force generated by the spring elements. An advantage of this is that the movement of the armature part is guided axially by the bolts.

[0037] In an advantageous embodiment, the bore diameter of the first bore is smaller than the bore diameter of the second bore.

[0038] wherein a respective spacer ring is placed on the respective bolt and is received in the second bore, in particular in the anchor part,

[0039] In this configuration, a ring spring is mounted on each bolt and supported on the flange. The ring spring presses against the spacer ring, which, particularly on its side facing away from the ring spring and / or the flange, thus rests against the magnet body. An advantage of this design is that the spacer ring is pushed away from the flange by the ring spring and thus rests against the magnet body. In a further advantageous embodiment, an adjusting nut screwed onto each bolt rests against the magnet body on the side facing away from the armature. An advantage of this design is that the distance is adjustable, allowing for compensation of wear on the brake pads of the brake pad carrier.

[0040] In an advantageous embodiment, a printed circuit board equipped with electronic components is attached to the side of the magnet body section facing axially away from the armature section. An advantage of this is that the electronic power supply and control of the winding can be implemented by an electronic circuit integrated directly into the brake assembly.

[0041] Because the circuit board is designed as a broken ring, it can be easily mounted. After placing it on the magnet body, it simply needs to be rotated between the winding and the magnet body to make contact. Preferably, the circuit board has a socket that allows the winding to be connected without an additional cable.

[0042] Further advantages arise from the dependent claims. The invention is not limited to the combination of features of the claims. For those skilled in the art, further meaningful combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent, in particular from the problem statement and / or the problem arising from a comparison with the prior art. The invention will now be explained in more detail with reference to schematic illustrations:

[0043] Figure 1 shows a braking arrangement according to the invention for braking a shaft in an oblique view.

[0044] Figure 2 shows the brake assembly in oblique view without the housing part and without the electronic mounting.

[0045] Figure 3 shows only the parts relevant to the magnetic flux, in particular a winding 1, a magnet body part 9 and an armature part 8, in oblique view.

[0046] Figure 4 shows the magnetic body part 9 and the armature part 8 in oblique view.

[0047] Figure 5 shows the magnetic body part 9 in an oblique view.

[0048] Figure 6 shows the anchor part in an oblique view.

[0049] In Figure 7, the magnetic body part 9 and the armature part 8 are shown in an oblique view in a transparent manner, so that the spring elements 70 arranged between the magnetic body part 9 and the armature part 8 become visible.

[0050] Figure 8 shows a top view of the coil carrier 11 which receives the winding 1.

[0051] Figure 9 shows the coil carrier 11 in oblique view.

[0052] As shown in the figures, the brake assembly has a winding 1 which is wound around an annular, in particular horseshoe-shaped, magnetic body part 9. The interruption of the ring, in particular the opening of the horseshoe, is arranged diametrically opposite the winding 1.

[0053] The ring axis is aligned parallel to the axis of rotation of the shaft to be braked. A similarly ring-shaped driver is mounted on the shaft and connected to the shaft in a rotationally fixed manner, in particular by means of a keyway connection.

[0054] The ring axis of the ring-shaped driver is coaxially aligned with the axis of rotation of the shaft.

[0055] The driver has an external toothing on its outer circumference which engages with an internal toothing of a perforated disc-shaped brake pad carrier, in particular by which the brake pad carrier is rotationally fixed to the driver and therefore also to the shaft.

[0056] The brake pad carrier is thus arranged to be axially movable on the shaft and is rotationally fixed to the shaft. Furthermore, the brake pad carrier is provided with brake pads on both axial sides.

[0057] An armature part 8 is arranged axially between the brake pad carrier and the magnet body part. This armature part is also ring-shaped, and its ring axis is aligned coaxially with the ring axis of the magnet body part. The armature part 8 has an opening of the same size as the ring-shaped magnet body part.

[0058] Spring elements 70, in particular return springs, supported on the magnet body part 9, press against the armature part 8. Thus, when the winding 1 is not energized, the armature part 8 is pushed away from the magnet body part 9, and when the winding 1 is energized, the armature part 8 is pulled towards the magnet body part 9 against the spring force generated by the spring elements 70, since the interruption of the magnet body part 9 represents a larger air gap than the air gap between the magnet body part 9 and the armature part 8, in particular the axial distance between the magnet body part 9 and the armature part 8.

[0059] The armature part 8 and the magnet body part 9 are both preferably made of ferromagnetic steel.

[0060] The anchor part 8 also has a break in the circumferential direction, which is arranged diametrically opposite, in particular offset by 180° in the circumferential direction.

[0061] The winding 1, wound around the magnetic body part 9, projects into the interruption of the armature part 8. In particular, the area covered by the winding 1 in the circumferential direction is contained within the area covered by the interruption of the armature part 8 in the circumferential direction.

[0062] The area covered by winding 1 in the axial direction overlaps with the area covered by armature part 8 in the axial direction.

[0063] The area covered by the armature part 8 in a radial direction is identical to the area covered by the magnet body part 9 in a radial direction.

[0064] At the edge of the magnetic body part 9, first bores 20 are spaced apart from each other in the circumferential direction, the diameter of which is smaller than the respective diameter of second bores 21, which are made in the edge of the armature part 8.

[0065] Bolts 3 are inserted or screwed into bores in a flange part 7, which is located on the side of the brake pad carrier facing away from the anchor part 8. Each bolt 3 projects through a first bore 20 and a second bore 21, which is coaxially aligned with it. Spacers 5 are fitted onto the bolts 3, which guide the anchor part 8 during its axial reciprocating movement.Since the spacer sleeves 5 have a larger outer diameter than the maximum clear inner diameter of the respective first bore 20 of the magnet body part 20, and ring springs 6 are mounted on the bolts 3, which are arranged axially between the flange part 7 and the spacer sleeves 5, these ring springs 6, supported on the flange part 7, press axially onto the spacer sleeves 5, which thus press the magnet body part 9 away from the flange part 7 against an axially limiting adjusting nut 4 screwed onto a threaded area of ​​the respective bolt.

[0066] By actuating the adjusting nut 4, in particular by turning the adjusting nut 4, the maximum distance between the magnet body part 9 and the bearing flange 7 is set.

[0067] The armature part 8 is therefore rotationally fixed to the bearing flange 7 and the magnet body part 9 and is arranged to be axially movable.

[0068] On the side of the magnet body part 9 facing away from the bearing flange 7, a printed circuit board 2 equipped with electronic components is arranged and held at a defined distance by spacer bolts which are inserted into narrow axial bores in the magnet body part. The inner diameter of the narrow axial bores is smaller than the outer diameter of the bolts 3.

[0069] Because the circuit board is designed as a broken ring, it can be easily mounted. After placing it on the magnet body, it simply needs to be rotated between the winding and the magnet body to make contact. Preferably, the circuit board has a socket that allows the winding to be connected without an additional cable.

[0070] When winding 1 is energized, the armature part 8 is drawn towards the magnet body part 9, thus releasing the brake pad carrier along with its brake pads. However, when winding 1 is energized, the spring elements 70, supported on the magnet body part 9, push the armature part 8 towards the brake pad carrier, which is thereby pressed against a braking surface formed on the bearing flange 7, in particular a finely ground surface. Braking torque is generated both by the brake pads on the brake pad carrier facing the braking surface and by the brake pads on the brake pad carrier facing the armature part 8.

[0071] The spring elements 70, which are supported on the magnet body part 9, are received in the bores 10 arranged in the armature part 8 and press on the armature part 8.

[0072] Thus, the spring elements 70 with their end regions facing the armature part 8 protrude into axial bores 10 of the armature part 8, each designed as a blind hole, and the spring elements 70 with their end regions facing the magnet body part 9 protrude into axial bores 10 of the magnet body part 9, each designed as a blind hole.

[0073] Winding 1 is supplied by the circuit formed with the electronic components.

[0074] The axial direction is always parallel to the axis of rotation of the shaft being braked. The radial direction is also relative to the axis of rotation of this shaft, as is the circumferential direction.

[0075] Preferably, the flange part 7 is designed as a bearing receiving element and accommodates a bearing of the rotor shaft of an electric motor. A stator housing is connected to the flange part 7 on the side of the flange part 7 facing away from the magnet body part 9. Another bearing is connected on its axially opposite side to the flange part 7 to a bearing flange, which accommodates a further bearing for the rotatable mounting of the rotor shaft of the electric motor. Thus, the braking arrangement is integrated into the electric motor, which then functions as a brake motor.

[0076] The winding 1 is wound on a coil carrier which is pushed onto the magnet body part 9, particularly in the circumferential direction. The interruption is greater in magnitude in the circumferential direction than the circumferential extent of the coil carrier.

[0077] The coil carrier has a hollow base body with which the coil carrier is pushed onto the magnet body part, and has boundary walls adjacent to the base body which, on the one hand, limit the winding.

[0078] The smallest radial distance of the hollow base body of the coil carrier to the ring axis of the magnet body part is independent of the circumferential angle position.

[0079] The largest radial distance of the hollow base body of the coil carrier to the ring axis of the magnet body part is independent of the circumferential angle position.

[0080] The cross-sectional structure between the hollow base body and a respective cutting plane, which has only a single circumferential angle position, is independent of the circumferential angle position.

[0081] The radial distance of the section between the hollow base body and one or the respective cutting plane, which has only a single circumferential angle position, is independent of the circumferential angle position.

[0082] The wall thickness of the hollow base body, particularly in the circumferential angle area covered by the hollow base body, is independent of the circumferential angle position and / or the radial distance to the ring axis of the magnet body part 9.

[0083] The boundary walls position the coil carrier by projecting into the opening in the armature disk, in particular wherein the first of the two boundary walls is arranged at the circumferentially forward end of the opening and the second of the two boundary walls is arranged at the circumferentially rear end of the opening. High energy efficiency of the brake is achieved by the circumferential magnetic flux because, unlike an axial magnetic flux, where the coil must be guided around the motor shaft, a significantly shorter conductor length per turn of the excitation coil is required. The magnetomotive force required for generating the magnetic field is therefore achievable with a considerably lower ohmic resistance of the winding 1, which is preferably made of copper.

[0084] In further embodiments according to the invention, the magnetic body part is formed from two or more ring parts arranged concentrically to each other.

[0085] in particular, which are radially spaced from each other. Each of the ring segments is designed with interruptions, but these interruptions are spaced apart from each other in the circumferential direction. This ensures a uniform force distribution. Reference numeral list

[0086] 1 winding

[0087] 2 Printed circuit board, in particular ring-shaped interrupted printed circuit board

[0088] 3 bolts

[0089] 4 adjusting nuts

[0090] 5 Spacer sleeve

[0091] 6 ring springs

[0092] 7 Flange part

[0093] 8. Anchor part, in particular annular anchor part, in particular horseshoe-shaped anchor part; 9. Magnetic body part, in particular annular anchor part, in particular horseshoe-shaped magnetic body part

[0094] 10 Axial bore

[0095] 11 coil carriers

[0096] 20 first borehole

[0097] 21 second bore

[0098] 70 Spring element, in particular return spring

[0099] 80 Hollow base body

[0100] 81 Boundary wall

Claims

Patent claims:

1. Electromagnetically actuated brake arrangement, in particular for an electric motor, comprising an electrically energizable winding, a magnetic body part and an armature part movable relative to the magnetic body part, characterized by the fact that the magnetic body part is designed in a ring shape around a ring axis, in particular in a ring section shape, wherein the anchor part is designed in a ring shape around the ring axis, in particular in a ring-section shape, where the magnetic body part in the circumferential direction, in particular at a single circumferential point, has a radially and axially continuous interruption between the ring axis of the magnetic body part and the external environment or the radial outer circumference of the magnetic body part and / or extends in a circumferential direction in magnitude over less than 360°, in particular less than 355°, but in particular more than 300°, where the anchor part in the circumferential direction, in particular at a single circumferential point, has a radially and axially continuous interruption between the annular axis of the anchor part and the external environment or the radial outer circumference of the anchor part and / or extends in the circumferential direction in magnitude over less than 360°, in particular less than 355°, but in particular more than 300°.

2. Brake arrangement according to claim 1, characterized by the fact that the ring axis of the magnet body part is aligned coaxially with the ring axis of the armature part, and / or that the length of the interruption in the circumferential direction is greater than a working air gap of the brake arrangement and / or that the length of the interruption in the circumferential direction is suitable for placing and / or attaching the coil body to the magnet body part, and / or that the length of the interruption in the circumferential direction is less than 1.2 times the radial width of the magnetic body part, in particular less than 120% of the radial width of the magnetic body part.

3. Brake arrangement according to one of the preceding claims, characterized by the fact that the winding is wound on a coil carrier which is pushed onto the magnet body part, particularly in the circumferential direction, and / or that the interruption in the circumferential direction is greater in magnitude than the circumferential extent of the coil carrier and / or that- 16-the coil carrier has a hollow base body with which the coil carrier is pushed onto the magnet body part, and boundary walls adjacent to the base body which on the one hand limit the winding, and / or that the smallest radial distance of the hollow base body of the coil carrier to the ring axis of the magnet body part is independent of the circumferential angle position, and / or that the largest radial distance of the hollow base body of the coil carrier to the ring axis of the magnet body part is independent of the circumferential angle position, and / or that the cross-sectional structure between the hollow base body and a respective cutting plane, which has only a single circumferential angle position, is independent of the circumferential angle position, and / or that the coil carrier dips into and / or protrudes into the interruption of the armature disk, and / or that the radial distance of the cut between the hollow base body and one or the respective cutting plane, which has only a single circumferential angle position, is independent of the circumferential angle position, and / or that the wall thickness of the hollow base body, in particular in the circumferential angle area covered by the hollow base body, is independent of the circumferential angle position and / or the radial distance to the ring axis of the magnetic body part,- 17 -and / or that The boundary walls position the coil carrier by projecting into the interruption of the armature disk, in particular wherein the first of the two boundary walls is arranged at the circumferentially forward end of the interruption and the second of the two boundary walls is arranged at the circumferentially rear end of the interruption.

4. Brake arrangement according to one of the preceding claims, characterized by the fact that The maximum gap width of the air gap between the armature part and the magnet body part, in particular the maximum gap width of the air gap between the armature part and the magnet body part occurring during the movement of the armature part, is smaller, at least ten times smaller, than the width, in particular minimum width, of the interruption of the magnet body part, especially in the circumferential direction.

5. Brake arrangement according to one of the preceding claims, characterized by the fact that the winding is wound onto the magnetic body part and / or around the magnetic body part, in particular to generate a main magnetic flux flowing circumferentially through the magnetic body part of the magnetic field generated by the winding.

6. Brake arrangement according to one of the preceding claims, characterized by the fact that the area covered by the winding in the circumferential direction is included in the area covered by the interruption of the armature part in the circumferential direction.

7. Brake arrangement according to one of the preceding claims, characterized by the fact that The area covered by the armature part in the axial direction is encompassed by or overlaps with the area covered by the winding in the axial direction, in particular parallel to the direction of the ring axis of the armature part.- 18- 8. Brake arrangement according to one of the preceding claims, characterized by the fact that the axis of rotation of a shaft to be braked in the brake assembly is aligned coaxially to the ring axis of the armature part and / or coaxially to the ring axis of the magnet body part.

9. Brake arrangement according to one of the preceding claims, characterized by the fact that The interruption of the armature part to the interruption of the magnetic body part, particularly in the circumferential direction, is arranged diametrically opposite each other.

10. Brake arrangement according to one of the preceding claims, characterized by the fact that Bolts spaced apart in the circumferential direction are connected to a flange part having a braking surface, wherein the bolts each protrude through a respective first bore, in particular axial bore, of the armature part and through a respective second bore, in particular axial bore, of the magnet body part.

11. Brake arrangement according to one of the preceding claims, characterized by the fact that the first bore is a marginal bore, in particular the smallest distance of the first bore to the ring axis is greater than half the difference between the outer diameter of the magnetic body part and the bore diameter of the first bore and / or that The second bore is a marginal bore, in particular, the smallest distance of the first bore to the ring axis is greater than half the difference between the outer diameter of the anchor part and the bore diameter of the second bore.- 19- 12. Brake arrangement according to one of the preceding claims, characterized by the fact that the magnetic body part is detachably connected to the flange part by means of the bolts, wherein the armature part is arranged to be movable relative to the magnet body part, in particular axially movable, and is connected to the magnet body part in a rotationally stable manner.

13. Brake arrangement according to one of the preceding claims, characterized by the fact that a ring-shaped driver is mounted on the shaft, in particular the rotor shaft of the electric motor, which has external teeth and which is rotationally connected to the shaft, in particular by means of a keyway connection, wherein a perforated disc-shaped brake pad carrier with its internal teeth is mounted on the driver, wherein the internal teeth are in engagement with the external teeth, wherein the brake pad carrier is rotatably connected to the driver and is axially movable on the driver, wherein the armature part is arranged axially between the brake pad carrier and the magnet body part, wherein spring elements supported on the magnetic body part press against the armature part, in particular wherein the spring elements with their end regions facing the armature part project into axial bores of the armature part designed as blind holes and the spring elements with their end regions facing the magnet body part project into axial bores of the magnet body part designed as blind holes.- 20- 14. Brake arrangement according to one of the preceding claims, characterized by the fact that When the winding is not energized, the spring elements press the armature part towards the brake pad carrier, whereby the brake pad carrier is pressed against the braking surface on its side facing away from the armature part axially. where, when the winding is energized, the armature part is pulled towards the magnet body part against the spring force generated by the spring elements.

15. Brake arrangement according to one of the preceding claims, characterized by the fact that the bore diameter of the first bore is smaller than the bore diameter of the second bore, wherein a respective spacer ring is placed on the respective bolt and is received in the second bore, in particular in the anchor part, wherein a ring spring is mounted on the respective bolt and supported on the flange part, wherein the respective ring spring presses on the respective spacer ring, which, in particular on its side facing away from the ring spring and / or the flange part, thus rests against the magnet body part, and / or that A respective adjusting nut, screwed onto the respective bolt, rests against the magnetic body part on the side of the magnetic body part facing away from the armature part. - 21 - 16. Brake arrangement according to one of the preceding claims, characterized by the fact that a circuit board equipped with electronic components is attached to the side of the magnet body part facing away from the armature part axially, in particular wherein the circuit board is ring-shaped and has a break in the circumferential direction and / or extends in the circumferential direction only over less than 350°, but in particular more than 180° or more than 270°.

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