Electromagnetic spring pressure brake and method for manufacturing the same

Abstract

The present invention relates to an electromagnetic spring pressure brake (BR) that can be manufactured inexpensively and has an optimized power density and a long service life. This is achieved by connecting the coil support (1) and flange plate (9) to each other by a narrow spacing strip (2) with a short radial extension, which is also rotatably fixed and serves as an axially movable guide for the armature disk (4). The present invention also relates to a manufacturing method in which the connection between the coil support (1), spacing strip (2), and flange plate (9) is created so that the smallest possible air gap (L) is created between them. The coil support (1) and armature disk (4) are closed in a process-reliable manner by the spring pressure brake (BR).

Description

Technical Field

[0001] The present invention relates to electromagnetic brakes, particularly to electromagnetic spring pressure brakes having a preferably circular structural form, said electromagnetic spring pressure brakes comprising at least one force-exerting element, such as a coil holder having at least one compression spring, at least one electromagnetic coil, at least one armature disk, and in a preferred embodiment at least one brake rotor having friction linings on both planes, and a counter friction surface. The present invention also relates to a method for manufacturing such electromagnetic spring pressure brakes (hereinafter usually simply referred to as spring pressure brakes).

[0002] The spring pressure brake according to the present invention is characterized by a structural form that optimizes performance and service life, and is provided using a special low-cost manufacturing method that further increases the output density of the spring pressure brake.

Background Art

[0003] From the prior art, electromagnetic spring pressure brakes are known in which the coil holder is screwed to a counter friction surface in the form of a flange plate via a spacer bush. Such a spring pressure brake is shown in FIG. 1. In this case, in addition to connecting the coil holder to the flange plate, the spacer bush functions as a rotatable fixation of the axially movable armature disk, and at least one brake rotor is arranged radially inside the spacer bush. Thereby, the outer diameter of the brake rotor, and thus the effective friction radius, is limited. Also, the possible wear reserve of the friction lining, which depends on the structurally possible volume of the friction lining, is thereby limited, which has a negative impact on the service life of the spring pressure brake.

[0004] The so-called gap in a spring-pressure brake, which occurs between the coil holder and the armature disc when the brake is closed, is determined by the dimensions of the components in such a configuration and is therefore subject to a corresponding large tolerance resulting from the sum of the tolerances of the multiple components. To ensure the specified minimum gap, a gap with a large nominal dimension must be provided, thereby limiting the force of the magnetic circuit of the electromagnet, which consists of the armature disc and the coil holder. This also limits the possible force of the compression spring used and, consequently, the braking torque that can be generated by the spring-pressure brake. In the case of a given installation space for a spring-pressure brake in a configuration corresponding to the prior art described above, the achievable braking torque and wear reserve cannot be increased any further.

[0005] As can be seen from International Publication No. 2019 / 007931, measures to increase the possible friction radius of a brake rotor are known from the prior art. In this case, it has been proposed to use a spacer element integrally molded on the coil holder instead of a separate spacer bush. This spacer element also serves as a rotatable fixing part for the armature disc, and its through holes for fastening screws open radially inward toward the coil space for the electromagnetic coil. This can slightly increase the friction radius of the brake rotor, and as a result, the achievable torque and the service life of the spring pressure brake, which depends on the volume of the friction lining, can also be slightly increased. However, the effects of part tolerances remain, and there are also disadvantages associated with the need to create a large gap.

[0006] To further increase power density, German Patent Application Publication No. 102016103176 proposes a special structural configuration and manufacturing method for a preferably circular electromagnetic spring pressure brake. This structural configuration allows for a further increase in the friction radius of the brake rotor, and an optimized small gap can be achieved by the proposed method for the connection between the coil holder and the flange plate, preferably via a tubular connecting element. However, in the spring pressure brake described, there is a functional separation between the connection between the coil holder and the armature and the rotatable fixed portion of the armature disc. For the rotatable fixed portion of the armature disc, a separate element in the form of a cylindrical bolt inserted into a hole in the coil holder is provided. This increases manufacturing complexity and reduces the pole surface of the coil holder that can be used for mounting the spring element and / or powering up the electromagnet. Consequently, the achievable power density is also limited in the case of this spring pressure brake. [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] Accordingly, the object of the present invention is to provide a preferably circular electromagnetic spring pressure brake that can be produced inexpensively and has optimized power density and a long service life. In the electromagnetic spring pressure brake, the friction radius of at least one brake rotor is maximized by structural measures, there are no additional guide elements for the armature disc on the pole surface of the electromagnet formed from the coil holder and electromagnetic coil, existing part tolerances are eliminated by a special manufacturing method, thereby achieving a precise and very small gap between the electromagnet and the armature disc. On the other hand, the thickness tolerance of parts such as the armature disc or brake rotor can be increased, which enables further cost reduction. This object is solved by the features of the independent claims of the present invention. [Means for solving the problem]

[0008] In the spring pressure brake according to the present invention, the spacer bush is proposed to be replaced by a spacer strip having a small radial extension (Erstreckung). The spacer strip is manufactured integrally with the coil holder, or alternatively, can be firmly connected to the coil holder by, for example, welding, bonding, screwing, riveting, flanging, or equivalent connection methods. In this case, the spacer strip having a rectangular or substantially rectangular cross-section in at least a portion of its longitudinal extension serves as a guide for the armature disc, by which the armature disc is rotatably fixed and axially movable.

[0009] To secure the spring pressure brake to a peripheral area, such as a machine wall, the coil holder has corresponding threads or equivalent connecting means. Alternatively, the flange plate opposite the coil holder may also be provided with corresponding connecting means, such as internal threads or threaded bolts. In the radial direction within at least three spacer strips, the brake rotor is positioned between the armature disc and the flange plate, and thus can have a large friction radius, which contributes to the high power density and large wear reserve of the spring pressure brake.

[0010] Herein, the spring pressure brake according to the present invention may comprise only one brake rotor, thereby having a coil holder, an armature disc, a brake rotor having friction linings on both sides, and a flange plate in the aforementioned parts order.

[0011] To increase the achievable torque several times over, the spring pressure brake may also be equipped with multiple brake rotors, so that, for example, a double rotor brake has, in the aforementioned parts order, a coil holder, an armature disc, a first brake rotor, an intermediate plate that is rotatably fixed by a spacer strip and movable in the axial direction, a second brake rotor, and finally, a flange plate.

[0012] To further improve power density, the present invention proposes using a special manufacturing method that eliminates manufacturing tolerances of parts that lead to variations in air gaps during the assembly of the spring pressure brake. To this end, the spacer strip and flange plate are adjusted relative to each other such that the flange plate has its outer circumference or flange plate groove radially within the centering region of the spacer strip, and has a corresponding moving gap in the axial direction.

[0013] In the manufacturing process, a coil holder fitted with a compression spring is placed on a jig plate with its flat surface facing a spacer strip, and the armature disc, brake rotor, and flange plate are inserted in that order into the radial space between the spacer strips. Next, one or more press stamps are used to press the flange plate against the coil holder in the direction of a first stroke motion until all the aforementioned parts directly overlap each other. Then, one or more press stamps are controlled to move in the direction of a second stroke motion by a distance corresponding to the desired gap in the spring pressure brake. Finally, a strong connection is created between the end of the spacer strip facing the flange plate and the flange plate by, for example, welding, soldering, or bonding, preferably by laser welding. In this case, the welding laser can be guided by a robot along the desired joining path. Alternatively, the spring pressure brake having the area to be joined can be guided along the welding laser on a jig plate that rotates around a rotation axis. The spring pressure brake with the gap can then be removed from the jig plate and provided to the customer as an installable unit.

[0014] If the described manufacturing method is carried out using multiple press stamps distributed on the circumference of the spring pressure brake, and each press stamp performs individually path-controlled operation, then the different height tolerances of the coil holder and / or armature disc and / or flange plate, which are distributed on the circumference, can be compensated in a favorable manner.

[0015] In an alternative manufacturing method that can be carried out using one or more press punches, first, a coil holder having a compression spring is placed on a jig plate. Next, at least two spacer films are provided circumferentially on the pole surfaces of the coil holder, and then the armature disc, brake rotor, and flange plate are placed in this order. The thickness of the spacer films used here corresponds to the desired rear gap of the spring pressure brake. Next, at least one press stamp presses the flange plate in the direction of the first stroke motion until all the aforementioned parts, including the spacer films, directly overlap each other. In this position, a strong connection is made between the ends of the spacer strips and the outer circumference of the flange plate, preferably by laser welding. Then, the spacer films are pulled radially out from the gap between the coil holder and the armature disc, thereby obtaining the desired gap in the spring pressure brake. After the press stamp returns to its initial position, the spring pressure brake can be shipped immediately as an assembled unit.

[0016] The described configuration and manufacturing method make it possible to provide a low-cost electromagnetic spring pressure brake with optimized power density and a long service life. In this process, structural measures maximize the friction radius of the brake rotor, the polar surfaces of the coil holder allow for maximum magnetic and spring force with minimal interruption, and component tolerances are eliminated by a special manufacturing method, thereby enabling precise and very small gaps between the coil holder and the armature disc.

[0017] Further advantageous details of the present invention will become apparent from the claims and the description of the drawings, which will be added later. [Brief explanation of the drawing]

[0018] [Figure 1] This is a longitudinal section of a conventional electromagnetic spring pressure brake, as well as a perspective view thereof with detail A. [Figure 2] This is a longitudinal section of a first embodiment of a spring pressure brake according to the present invention, and a perspective view thereof having detail part B. [Figure 3] Figure 2 shows an exploded perspective view of a first embodiment of a spring pressure brake according to the present invention, as well as a detailed part C. [Figure 4] This is an exploded perspective view of a second embodiment of a spring pressure brake according to the present invention, as well as a detailed part D. [Figure 5] This is an exploded perspective view of a third embodiment of a spring pressure brake according to the present invention, as well as a detailed part E. [Figure 6] This is a longitudinal section of a fourth embodiment of a spring pressure brake according to the present invention, as well as a perspective view thereof having a detailed part F. [Figure 7] Figure 2 shows a longitudinal cross-sectional view and a perspective view of a first embodiment of a spring pressure brake according to the present invention in a first adjustment device. [Figure 8] Figure 5 shows a longitudinal section and a perspective view of a third embodiment of a spring pressure brake according to the present invention, in a second adjustment device. [Modes for carrying out the invention]

[0019] As shown in Figure 1, in a conventional electromagnetic spring pressure brake (BR), a coil holder (1) is coupled to a flange plate (9) via a spacer bush (7) and a screw (8). Between the coil holder (1) and the flange plate (9), an armature disc (4) and a brake rotor (5) having friction linings (5.1) on both sides are arranged. In this case, the brake rotor (5) is tightly fitted to a toothed boss (6) via rotor teeth (5.2), and the toothed boss is connected to, for example, a motor shaft (not shown).

[0020] As can be seen from the detail A, the armature disk (4) is fixedly mounted for rotation and axially movable, guided via an armature keyway (4.1) on a spacer bush (7), and is pressed against the brake rotor (5) by a compression spring (11) disposed in a spring bore (1.2) of the coil holder (1) when the electromagnetic coil (3) is not energized. Thereby, the brake rotor (5) is sandwiched between the armature disk (4) and the flange plate (9), and rotation of a shaft (not shown) about a rotation axis (A) via a toothed boss (6) is prevented. By energizing the electromagnetic coil (3) embedded in the coil chamber (1.1) of the coil holder (1), the armature disk (4) is attracted to the coil holder (1) against the force of the compression spring (11), releasing the brake rotor (5), which can then freely rotate about the rotation axis (A) together with the toothed boss (6) and the shaft.

[0021] It is clear that the outer diameter of the brake rotor (5) is limited by the dimensions of the spacer bush (7), and that the size of the gap (L) between the coil holder (1) and the armature disk (4) which occurs when the spring pressure brake (BR) is closed is determined by the thicknesses of the armature disk (4) and the brake rotor (5), the axial extension of the spacer bush (7), and the corresponding dimensional tolerances. Due to the limited size of the brake rotor (5) and the required size of the gap (L), the prior art spring pressure brake (BR) has a limited output density and a limited service life.

[0022] Figure 2 shows a first embodiment of a spring pressure brake (BR) according to the invention, which brake corresponds approximately to the prior art with respect to the spatial arrangement of the coil holder (1), the armature disk (4), the brake rotor (5) and the flange plate (9). Only the function of the spacer bush (7) used in the prior art spring pressure brake (BR) is taken over by a spacer strip (2) which forms an integral shape with the coil holder (1). In this case, on the one hand, the spacer strip (2) provides a connection between the coil holder (1) and the anti-friction surface (9) via the connection point (12) by means of its centering region (2.2), and on the other hand, by means of its guide region (2.1), as can be seen from detail B, it takes over the guidance of the armature disk (4) which is rotatably fixed and axially movable via the armature keyway (4.1). Due to the small radial extension of the centering region (2.2), the outer diameter of the brake rotor (5) can be made considerably larger compared to the prior art, which, in connection with the small clearance (L), significantly increases the output density and service life of the spring pressure brake (BR). The manufacturing method of the spring pressure brake (BR) which can achieve the small clearance (L) will be described elsewhere.

[0023] Furthermore, relief surfaces (2.4) are provided on both sides of the centering region (2.2) of the spacer strip (2) facing the armature keyway (4.1), and the axial guide height (2.5) of the guide region (2.1) is formed smaller than the axial thickness of the armature disk (4). This can prevent the armature disk (4) from biting into the guide region (2.1) and forming a shape-conforming connection with it in case of wear in the guide region (2.1). As a result, it is ensured that the armature disk (4) transmits the force of the compression spring (11) to the rotor (5) and the flange plate (9) during braking.

[0024] The spring pressure brake (BR) can be fixed to the surrounding area, for example, the inside of the servo motor housing, by threads (1.3) formed on the back of the coil holder (1). Similarly, the spring pressure brake (BR) can be fixed via threads, bolts, or holes in the flange plate (9).

[0025] Figure 3 and detail section C depict the spring pressure brake (BR) of Figure 2 again, with further details shown in the perspective view provided by detail section C. The spacer strip (2), integrally formed with the coil holder (1), has a guide region (2.1) for rotatably fixing and axially movably guiding the armature disc (4), and an axially adjacent centering region (2.2) for centering the flange plate (9). The guide region (2.1) is formed in an arc shape to form a large contact surface with the armature keyway (4.1) to reduce wear and to reliably prevent tilting of the armature disc (4) during its axial movement. This is particularly important because the electromagnetic spring pressure brake (BR) is a safety-related component that normally operates on a fail-safe principle and must exhibit its full braking effect when not energized.

[0026] In the proposed configuration of the guide region (4.1), in the case of a spring pressure brake (BR) according to the prior art shown in Figure 1, it is also possible to use an armature disc (4) corresponding to a proven structural configuration.

[0027] To ensure the full mobility of the armature disc (4) even if the guide area (2.1) wears down during braking, lateral relief surfaces (2.4) are provided on both sides of the centering area (2.2).

[0028] The arc-shaped inner contour of the centering region (2.2) allows the outer contour to precisely fit the centering region (2.2), enabling the use of an annular flange plate (9) that can be manufactured at low cost.

[0029] Figure 4 and detail D show an alternative embodiment of a spacer strip (2) integrally formed with the coil holder (1). The guide region (2.1) for rotatably fixing and axially movably guiding the armature disc (4) and the centering region (2.2) for receiving the flange plate (9) have a cross-section that is radially equal along the longitudinal extension of the spacer strip (2) and can be manufactured very cost-effectively. This allows for a further enlargement of the pole surface of the coil holder (1).

[0030] The spacer strip (2) has a smaller circumferential extension due to the relief surface (2.4) only in the centering region (2.2) in order to ensure full mobility of the armature disc (4) during braking.

[0031] In this example, the armature disk (4) has a corresponding armature keyway (4.1) having a rectangular cross-section.

[0032] Figure 5, with detail E, shows a further embodiment of the spring pressure brake (BR) according to the present invention, in which the spacer strip (2) and the coil holder (1) are not integrally formed. In this case, the spacer strip (2) consists of a centering region (2.2), a guide region (2.1), and a strip shaft (2.3), the strip shaft being inserted into a complementary receiving groove (1.4) extending axially in the coil holder (1) and firmly connected to the coil holder (1) by, for example, welding, bonding, screwing, riveting, flanging, or an equivalent alternative connection method. In this example, the strip shaft (2.3) has a greater radial extension than the centering region (2.2) and protrudes axially beyond the pole surface of the coil holder, thereby the strip shaft (2.3) also functions as a guide region (2.1). The armature keyway (4.1) of the armature disc (4) is formed in a corresponding complementary shape.

[0033] Alternatively, the spacer strip (2) could be constructed to have a constant cross-section throughout its entire longitudinal extension, or, in the case of the strip shaft (2.3), to have a radial extension smaller than the guide region (2.1) and the centering region (2.2).

[0034] Furthermore, as shown in Figures 2 to 4, it is also possible to provide a centering region (2.2) of the spacer strip (2) having an appropriate relief surface (2.4).

[0035] For fixing the illustrated spring pressure brake (BR) to the surrounding equipment, the outer diameter of the flange plate (9) protrudes from the coil holder (1), so it is also possible to fix the spring pressure brake (BR) from the side of the coil holder (1) via the fixing hole (9.2). Similarly, it is also conceivable to fix the spring pressure brake (BR) via the threads (1.3) or corresponding holes or bolts located in the area of ​​the coil holder (1).

[0036] In the example shown in Figure 5, the connection between the flange plate (9) and the spacer strip (2) is made between the bottom of each flange plate groove (9.1) and the centering region (2.2) of the spacer strip (2).

[0037] The longitudinal section of Figure 6, with its perspective view and detail section F, shows a double-rotor spring pressure brake (BR), which doubles the number of friction surfaces and thus doubles the achievable braking torque. Alternatively, an implementation with three or more brake rotors (5) is also possible. In the illustrated spring pressure brake (BR), the spacer strip (2) and coil holder (1) form a single shape, and the centering region (2.2) of the spacer strip (2) has a large axial extension parallel to the axis of rotation (A) to accommodate additional components. Thus, the spring pressure brake (BR) consists of a coil holder (1), an armature disc (4), a first brake rotor (5), an intermediate plate (10), a second brake rotor (5), and a final flange plate (9), which are arranged in the order described above. The armature disc (4) is rotatably fixed and axially movable on the guide region (2.1) of the spacer strip (2), where the guide region (2.1) can be formed not only with small or large radial extensions but also with angular or correspondingly rounded edges. The intermediate plate (10) is located in the centering region (2.2) of the spacer strip (2), where it is rotatably fixed by an intermediate plate keyway (10.1) and axially movable in the centering region (2.2).

[0038] Based on the half-section and perspective views of Figure 7, a first manufacturing method is described in which an increase in brake torque is achieved by reducing the gap (L). This method is applicable to all spring pressure brakes (BRs) described so far with reference to Figures 2 to 6, but is also applicable to spring pressure brakes (BRs) having a non-circular, for example, rectangular or polygonal outer contour, in which the functional components are arranged in an equivalent manner. In the example of the manufacturing method shown in Figure 7, it can be carried out using only one press stamp (S) or using multiple press stamps (S). First, a coil holder (1) having a compression spring (11) is placed on a jig plate (V). Next, at least two spacer films (D), preferably three spacer films (D), are distributed circumferentially on the pole surfaces of the coil holder (1), and then the armature disc (4), brake rotor (5), and flange plate (9) are placed in that order. Alternatively, a spacer film (D) can be placed between the armature disc (4) and the brake rotor (5), or between the brake rotor (5) and the flange plate (9). The thickness of the spacer film (D) used here corresponds to the desired rear gap (L) of the spring pressure brake (BR). Next, at least one press stamp (S) presses the flange plate (9) in the direction of the first stroke motion (M1) until all of the above components, including the spacer film (D), directly overlap each other. In this position, a firm connection between the end of the spacer strip (2) and the outer circumference of the flange plate (9) is made at the connection point (12), preferably by laser welding. Next, the spacer film (D) is pulled radially out from the gap between the coil holder (1) and the armature disc (4), thereby obtaining the desired gap (L) in the spring pressure brake (BR).

[0039] Next, the press stamp (S) is retracted in the direction of the second stroke movement (M2), the spring pressure brake (BR) is removed, and the unit is ready for immediate shipment. It should be noted that the above procedure does not imply any limitations on the spatial orientation of the parts described. The jig plate (V) can be in any spatial position, in which case the positions of the spring pressure brake (BR) components and the press stamp (S) are oriented relative to the position of the jig plate (V). Preferably, the jig plate (V) is spatially below when all the components of the spring pressure brake (BR) and the press stamp (S) are spatially above it.

[0040] An alternative manufacturing method will be described with reference to the half-section and perspective view in Figure 8. In the alternative manufacturing method, a coil holder (1) having a compression spring (11) is placed on a jig plate (V) with a plane facing the spacer strip (2), and the parts armature disc (4), brake rotor (5), and flange plate (9) are inserted in the space between the spacer strips (2) in the radial direction in the order described above. Next, the flange plate (9) is pressed against the coil holder (1) in the direction of a first stroke motion (M1) by one press stamp (S) lying concentrically with the axis of rotation, or by multiple press stamps (S) lying on a circular arc concentric with the axis of rotation, until all the above parts directly overlap each other. Next, one or more press stamps (S) are moved away in the direction of a second stroke motion (M2), controlled by a desired gap (L) in the spring pressure brake (BR).

[0041] Finally, a strong connection is made at the connection point (12) between the end of the spacer strip (2) facing the flange plate (9) and the flange plate (9), for example, by welding, soldering, or bonding, preferably by laser welding. In this case, the welding laser can be guided by a robot along the desired joining path.

[0042] Alternatively, the spring pressure brake (BR) having the area to be joined can be guided along the welding laser on a jig plate (V) that rotates around a rotation axis (A).

[0043] When the described manufacturing method is carried out using a plurality of press stamps (S) distributed on the circumference of the spring pressure brake (BR), each of which performs path-controlled movement, it is possible to advantageously compensate for various height tolerances distributed on the circumference of the coil holder (1) and / or the armature disc (4) and / or the brake rotor (5).

[0044] When one of the manufacturing methods shown in Figure 7 or Figure 8 is used for a spring-pressure brake (BR) having two brake rotors (5) as shown in Figure 6, or for a spring-pressure brake (BR) having two or more brake rotors (5), only at least one additional brake rotor (5) and at least one intermediate plate (9) need to be inserted into the space between the guide regions (2.2) of the spacer strip (2), compared to a spring-pressure brake (BR) having one brake rotor (5). The remaining method steps correspond to the procedures described in relation to Figures 7 and 8.

[0045] In the implementation of the spring pressure brake (BR) shown in Figure 5, if the coil holder (1) and spacer strip (2) are formed as separate parts, alternative modifications to the manufacturing method described below are possible. In this case, in the first step, the still loose spacer strip (2) is pre-connected to the flange plate (9) at the intended connection point (12), and the resulting assembly is later fixed to the coil holder (1).

[0046] In a manufacturing method similar to the one shown in Figure 7, the second step involves first placing an assembly consisting of a flange plate (9) and spacer strips (2) onto a jig plate (V), and then attaching a coil holder (1) having a brake rotor (5), an armature disc (4), a spacer film (D), and a compression spring (11). At this time, each strip shaft (2.3) engages with the corresponding receiving groove (1.4) of the coil holder. Next, the coil holder (1) is moved toward the flange plate in the direction of a first stroke motion (M1) using one or more press stamps (S) until all the parts lie directly on top of each other.

[0047] In this state, the spacer strip (2) is pushed radially into the receiving groove (1.4) of the coil holder (1) as needed, and then fixed to the coil holder by, for example, welding, soldering, or bonding, preferably by laser welding. Next, the spacer film (D) is removed radially from the spring pressure brake (BR), and at least one press stamp (S) is returned to its initial position in the direction of the second stroke movement (M2), and the spring pressure brake (BR) can be removed as a completed unit.

[0048] In a manufacturing method similar to the one shown in Figure 8, the second step involves first placing the assembly, consisting of a flange plate (9) and spacer strips (2), onto a jig plate (V), and then attaching the brake rotor (5) with compression springs (11), armature disc (4), and coil holder (1). At this time, each strip shaft (2.3) is engaged into the corresponding receiving groove (1.4) of the coil holder. Next, the coil holder (1) is moved toward the flange plate in the direction of a first stroke motion (M1) using one or more press stamps (S) until all the parts lie directly on top of each other.

[0049] Subsequently, at least one press stamp (S) is returned to the spring pressure brake (BR) by a distance corresponding to the desired gap (L) in the second stroke motion (M2), controlled to move it away. In this state, the spacer strip (2) is pushed radially into the receiving groove (1.4) of the coil holder (1) as needed, and then fixed to the coil holder by, for example, welding, soldering or bonding, preferably by laser welding. Finally, at least one press stamp (S) is returned to its initial position, and the spring pressure brake (BR) can be removed as a completed unit. [Explanation of symbols]

[0050] 1 Coil holder 1.1 Coil Chamber 1.2 Spring hole 1.3 Screw thread 1.4 Receiving groove 2 Spacer strips 2.1 Guide Area 2.2 Centering Area 2.3 Strip Shaft 2.4 Escape 2.5 Guide height 3 Electromagnetic coil 4. Armature Disc 4.1 Armature keyway 5 Brake rotors 5.1 Friction Lining 5.2 Rotor Teeth 6-toothed boss 7 Spacer Bushing 8 screws 9 Flange plate 9.1 Flange plate groove 9.2 Fixing holes 10 Intermediate plate 10.1 Intermediate plate keyway 11 Compression spring 12 connection points A rotation axis BR spring pressure brake D Spacer Film L void M1 First stroke action M2 Second stroke action S Press Stamp V-shaped jig plate

Claims

1. An electromagnetically released spring pressure brake (BR) having a rotating shaft (A) for mounting on a machine wall, motor housing or similar to a motor housing, The spring pressure brake (BR) consists of a coil holder (1), at least one armature disc (4), at least one brake rotor (5), and a flange plate (9). The coil holder (1) comprises one or more electromagnetic coils (3) and one or more compression springs (11). The components from the coil holder (1) to the flange plate (9) are arranged in order along the rotation axis (A) in the order described above. The coil holder (1) has at least three axially extending spacer strips (2) that are firmly connected to the coil holder (1) in the region of its outer circumference starting from the pole surface. Each of the spacer strips (2) having a guide region (2.1) ensures a rotatably fixed and axially movable mounting of the at least one armature disc (4) via a corresponding armature keyway (4.1) of the at least one armature disc (4). Each of the spacer strips (2) has a centering region (2.2) adjacent to the guide region (2.1) in the axial direction, and is firmly connected to the flange plate (9) via a connection point (12). The brake rotor (5) is sandwiched between the at least one armature disc (4) and the flange plate (9) in order to achieve a braking effect by the force of at least one compression spring (11). An electromagnetically released spring pressure brake (BR) wherein the at least one armature disc (4) is pulled toward the coil holder (1) against the force of the at least one compression spring (11) in order to terminate the braking effect by energizing the at least one electromagnetic coil (3), the coil holder (1) being integrally formed with the spacer strip (2).

2. The spring pressure brake (BR) according to claim 1, characterized in that the spacer strip (2) has a uniform cross-section of the centering region (2.2) and the guide region (2.1) over its axial extension, with a spatially optimized small radial extension.

3. The spacer strip (2) has different cross-sections for the guide region (2.1) and the centering region (2.2) along its axial extension. The guide region (2.1) has a greater radial extension than the centering region (2.2), The spring pressure brake (BR) according to claim 1, characterized in that the guide region (2.1) has a rounded or angular shape in the region facing the armature keyway (4.1).

4. The spring pressure brake (BR) according to any one of claims 1 to 3, characterized in that the spacer strip (2) has a cross-section corresponding to a cylindrical side portion with the rotation axis (A) as its central axis, at least inside the centering region (2.2) over its axial extension.

5. The spring pressure brake (BR) according to any one of claims 1 to 4, characterized in that the spacer strip (2) is arranged on the coil holder (1) at preferably equal angular intervals with respect to the rotation axis (A).

6. The spring pressure brake (BR) according to any one of claims 1 to 5, characterized in that the flange plate (9) has the shape of a smooth circular ring.

7. The flange plate (9) has the shape of a circular ring, The spring pressure brake (BR) according to any one of claims 1 to 6, characterized in that the contact areas of the flange plate (9) oriented radially toward the centering region (2.2) each form a flat shape.

8. The spring pressure brake (BR) according to any one of claims 1 to 7, characterized in that the centering region (2.2) of the spacer strip (2) has mutually opposing relief surfaces (2.4) arranged in the lateral direction, thereby the centering region (2.2) has a smaller width in the circumferential direction than the guide region (2.1).

9. A method for manufacturing an electromagnetically released spring pressure brake (BR), The spring pressure brake (BR) consists of a coil holder (1), at least one armature disc (4), at least one brake rotor (5), and a flange plate (9). The coil holder (1) has one or more electromagnetic coils (3) and one or more compression springs (11), The components from the coil holder (1) to the flange plate (9) are arranged in order along the rotation axis (A) in the order described above. The coil holder (1) has at least three spacer strips (2) extending axially in the outer peripheral region starting from the pole surface, the spacer strips ensuring rotatably fixed and axially movable mounting of at least one armature disk (4) via a guide region (2.1), and enabling a firm connection to the flange plate (9) via a centering region (2.2) and a connection point (12), The individual components of the spring pressure brake (BR) are inserted into a device consisting of a jig plate (V) and at least one press stamp (S) in the order described above, from the coil holder (1) to the flange plate (9). A method for manufacturing an electromagnetically released spring brake (BR), comprising: pressing all the components of the spring brake (BR) against a jig plate (V) with the press stamp (S) so that they are in direct contact with each other; then returning the press stamp to a controlled amount of a desired gap (L); and connecting the spacer strip (2) to the flange plate (9) in this position, A method for manufacturing an electromagnetically released spring pressure brake (BR), characterized in that the coil holder (1) is integrally formed with the spacer strip (2).

10. The manufacturing method according to claim 9, characterized in that the connection between the spacer strip (2) and the flange plate (9) is made by bonding, soldering, screwing, or welding.

11. The manufacturing method according to claim 10, characterized in that the connection between the spacer strip (2) and the flange plate (9) is created by an advantageous laser welding method.

12. The spring pressure brake (BR) according to any one of claims 1 to 8, characterized in that the spring pressure brake (BR) and, in particular, the coil holder (1) have a round outer contour, preferably a circular outer contour.

13. A method for manufacturing a spring pressure brake (BR) according to any one of claims 9 to 11, characterized in that the spring pressure brake (BR) and, in particular, the coil holder (1) have a round outer contour, preferably a circular outer contour.

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