Electromagnetic spring-loaded brake with release

Abstract

The invention relates to a release mechanism for electromagnetically opening brake calipers (BR) in floating-caliper construction, designed to bear against a brake disc (S). The release mechanism is in the form of release rings (12, 13, 14, 15) made of elastomeric or metallic materials, which are disposed in concentric recesses (1.2, 2.2, 9.2) in the area between the guide elements (9) and the coil support (1) or the armature plate (2) of the brake caliper (BR).

Description

[0001] Electromagnetic spring-loaded brake with release

[0002] In industrial drive technology, electromagnetically released spring-loaded brakes have become established among the braking systems used to slow down and hold the corresponding drives.

[0003] Electromagnetic spring-loaded brakes in the form of so-called brake calipers, which interact with large brake discs, are particularly used in high-torque drives. In addition to their ability to handle high torques, one advantage of such brake calipers is their modular design. This means that, depending on the required braking torque, one or more brake calipers can act on a brake disc.

[0004] Most of these brake calipers are designed in a so-called floating-caliper design, meaning that the entire brake caliper, consisting of a coil carrier with an armature disc and a counterplate, is mounted so that it can move parallel to the brake disc's rotational axis. The brake disc is mounted in such a way that it cannot move parallel to its rotational axis.

[0005] When the brake disc is decelerated, the force of spring elements clamps it between an armature plate equipped with friction linings and a counterplate, also equipped with friction linings, and brakes it. To open the brake caliper, the magnetic coil located in the coil carrier is supplied with electrical voltage, which attracts the armature plate to the coil carrier against the force of the spring elements, thus releasing the brake disc. To prevent contact between the friction linings on the armature plate and the counterplate and the brake disc when the brake is released, so-called release mechanisms are used in brake calipers.

[0006] A frictionally engaged release mechanism is known from DE10330306A1 by the applicant. This system presents a system of levers whose ends are attached to the armature disk and the coil carrier via elastic tongues. In a preferred embodiment, the axes of rotation of the levers are formed by contact points between stationary bolts and parallel sections of the levers equipped with friction linings. This results in uniform air gaps between the brake disc and the friction linings of the armature disk and the counterplate after the brake caliper is closed and subsequently opened. The system presented is also capable of ensuring very uniform air gaps between the brake disc and the friction linings of the brake caliper, even when the friction linings are worn. A disadvantage of the system presented here is the considerable technical effort required to achieve the desired functionality.

[0007] Furthermore, DE102016015242A1 from the applicant is specifically known for applications involving a vertical drive installation position, thus providing a vertical position of the brake disc's rotational axis and vertical mobility of the floating caliper. According to the teaching of this patent application, the release effect is achieved by direct stops within the brake caliper, which must also be adjustable within certain limits to ensure optimal adjustment of the desired air gap. The main disadvantage of this system is the high adjustment effort required for the stops, which often has to be performed at the brake's installation site, for example, on a construction site.

[0008] The object of the present invention is therefore to provide a simple and cost-effective release mechanism for a brake caliper, which ensures a sufficient release movement over the entire service life of the brake caliper and which requires no or only very little adjustment effort.

[0009] To this end, it is proposed to arrange at least one annular clearance element in the area between the preferably cylindrical guide elements of the brake caliper and the complementary openings, preferably cylindrical bores, of the coil carrier and / or the armature disk. Alternatively, the guide elements and the openings of the coil carrier and / or the armature disk can also have other prismatic cross-sections, which can be designed as a polygon or polygon. The clearance elements are arranged in a circumferential radial recess of the coil carrier and / or the armature disk and / or the guide element, whereby three variants for the geometric design of the recess within the brake are fundamentally possible.

[0010] In a first variant, the recess is defined radially by a circumferential surface and axially on a first side by an annular side surface of the corresponding component, i.e., the armature disk or the coil carrier itself. On a second side, the recess is defined by a side surface of the adjacent component, i.e., a side surface of the armature disk or the coil carrier.

[0011] It is possible for the recess to be made in only one of the components, i.e., the armature disk or the coil carrier. Alternatively, the recess can also be made in both components, e.g., approximately half in the armature disk and half in the coil carrier.

[0012] After installation, the release elements do not need to be in permanent spring contact with the guide element and the peripheral surface of the recess. With the first recess variant described above, it is sufficient if permanent spring contact is only present when the armature disk is in contact with the coil carrier when the brake caliper is open, thereby clamping the release element axially between the two components.

[0013] The at least one release element can be designed as an elastomer or pressure-elastic plastic ring in an uncoated or coated form with a preferably round, oval, polygonal, or polygonal cross-section, preferably a rectangular cross-section here, or have a cross-section corresponding to or similar to a commercially available quad ring. Furthermore, the release element can be formed from a metallic ring with one of the aforementioned cross-sections, which, thanks to its polygonal shape over its circumference, has the required elasticity in the radial and / or axial direction. Due to the described design of the components, it is sufficient during installation to simply slide the brake caliper onto the guide elements and connect the magnetic coil to the power supply.

[0014] When the brake caliper is closed, the friction linings of the armature disc and the friction linings of the counter plate are in contact with the brake disc and thus produce the desired braking effect.

[0015] At the latest when the brake caliper is first opened by energizing the solenoid coil, the release element is slightly clamped between the aforementioned parts after a first partial movement of the coil carrier and armature plate, creating frictional contact between the release element and the guide element on the one hand, and between the release element and the circumferential surface of the coil carrier or armature plate on the other. During a second partial movement between the coil carrier and armature plate until they touch one another, the release element is further preloaded axially from both sides by the coil carrier and the armature plate, each by the same amount, which corresponds to approximately half of the second partial movement.This ultimately generates a clearance movement between the friction linings of the armature plate and the counterplate, as well as the brake disc. This creates an approximately equal air gap on both sides of the brake disc when the brake caliper is open, enabling friction- and wear-free operation of the brake disc. Furthermore, this clearance reliably prevents annoying noise and unwanted energy losses.

[0016] In a second variant, the recess is delimited radially by a circumferential surface and axially on a first and a second side by an annular side surface of the corresponding component, i.e. the armature disk or the coil carrier itself, and thus forms a circumferential radial groove closed on three sides in every operating state of the brake caliper.

[0017] In the second variant, the release elements must be in permanent spring contact with the guide element and the peripheral surface of the recess after their installation.

[0018] Due to the described component design according to the second variant, it is sufficient to simply slide the brake caliper onto the guide elements and connect the solenoid coil to the power supply during installation. However, when sliding the brake caliper onto the guide elements, care should be taken to determine whether the recess for the release elements is located in the coil carrier or in the armature disk. If the recess is located in the coil carrier, the brake should be pushed onto the guide elements in such a way that the coil carrier moves away from the brake disk at least shortly before reaching its end position.

[0019] When placing the recess in the armature disc, the brake should be pushed onto the guide elements in such a way that the armature disc moves towards the brake disc at least shortly before reaching its end position.

[0020] If these installation directions cannot be ensured in practice, a one-time adjustment is required after sliding the brake caliper onto the guide elements. For example, this adjustment can involve axially shifting the guide elements in a brake frame in one direction until the system is ready for use.

[0021] Through correct installation according to one of the suggested procedures or after appropriate adjustment, the release element is preloaded in a direction parallel to the rotation axis when the brake is engaged. When the brake is released, the brake caliper moves, moving both the armature disc and the counter friction surface connected to the coil carrier away from the brake disc by the same distance. This enables the desired friction- and wear-free operation of the brake disc without disturbing noise and without unwanted energy losses.

[0022] In a third variant, the recess is introduced as a radial recess into at least one of the guide elements, wherein the recess is delimited radially by a circumferential surface and axially on a first and a second side by an annular side surface of the guide element and thus forms a circumferential radial groove closed on three sides in every operating state of the brake calliper.

[0023] In the third variant, the release elements must be in permanent spring contact with the circumferential surface of the guide element recess and the circumferential surface of the armature disk or coil carrier after installation. Due to the described component design, it is sufficient to simply slide the brake caliper onto the guide elements during installation and connect the solenoid coil to the power supply.

[0024] However, when sliding the brake caliper onto the guide elements, care should be taken to ensure that the recess on the guide elements is in the area of ​​the coil carrier or in the area of ​​the armature disk. If the recess is positioned in the area of ​​the coil carrier, the brake should be pushed onto the guide elements in such a way that the coil carrier moves away from the brake disk at least shortly before reaching its end position. If the recess is positioned in the area of ​​the armature disk, the brake should be pushed onto the guide elements in such a way that the armature disk moves towards the brake disk at least shortly before reaching its end position. If these assembly directions cannot be guaranteed in practice, appropriate one-off adjustment work is required after sliding the brake caliper onto the guide elements.

[0025] Through correct installation according to one of the suggested procedures or after appropriate adjustment, the release elements are preloaded in a direction parallel to the rotation axis when the brake is engaged. When the brake is released, the brake caliper moves, moving both the armature disc and the counter friction surface connected to the coil carrier away from the brake disc by the same distance. This enables the desired friction- and wear-free operation of the brake disc without disturbing noise and without unwanted energy losses.

[0026] Because the frictional forces between the guide elements and the release elements are very low relative to the masses moved by the brake caliper and the braking forces generated, the movement of the brake caliper is only slightly impeded when the brake is applied. This allows the full desired braking effect to always be achieved on both braking surfaces, relative to the brake disc.

[0027] For special application conditions such as vertical installation or high moving masses, the release system can be equipped with several release elements arranged axially one behind the other, preferably in a ring shape, or release elements with larger cross sections and / or higher axial and radial rigidity can be used.

[0028] With appropriate design and selection of optimal materials and surfaces, the presented release system, despite its simplicity and freedom from maintenance, achieves a long service life, which usually exceeds the service life of the friction linings of the brake caliper.

[0029] Further features of the release mechanism according to the invention for a brake caliper emerge from the following description of the embodiments in Fig. 1 to Fig. 11 and from the patent claims.

[0030] They show:

[0031] Fig. 1 shows a perspective view of a brake caliper according to the invention in floating caliper design, mounted on a brake disc.

[0032] Fig. 2 is a front view of the brake caliper according to the invention with brake disc and a section X - X.

[0033] Fig. 3 a sectional view of the closed brake calliper according to section line X

[0034] - X from Fig. 2.

[0035] Fig. 3 Detail A shows the detailed view of a first release element in the form of an O-ring lying loosely in a recess of the armature disk and a first air gap between the coil carrier and the armature disk, which is maximum here.

[0036] Fig. 3 Detail B shows the detailed view of a second and a third air gap, which are “zero” here.

[0037] Fig. 4 a sectional view of the opened brake calliper according to section X - X from Fig. 2

[0038] Fig. 4 Detail C shows the detailed view of the first release element in the form of an O-ring clamped in the recess of the armature disk and a first air gap between the coil carrier and the armature disk, which is “zero” here.

[0039] Fig. 4 Detail D shows the detailed view of a second and third air gap, which are of equal size here and show their maximum width.

[0040] Fig. 5 a sectional view of the closed brake calliper according to section line X

[0041] - X from Fig. 2. Fig. 5 Detail E the detailed view of a second release element in the form of a quad ring lying loosely in a recess of the coil carrier and a first air gap between the coil carrier and the armature disk, which is maximum here.

[0042] Fig. 5 Detail F the detailed view of a second and third air gap, which are “zero” here.

[0043] Fig- 6 a sectional view of the opened brake caliper according to the cutting line

[0044] X - X from Fig. 2

[0045] Fig. 6 Detail G shows the detailed view of the second release element in the form of a quad ring clamped in the recess of the coil carrier and a first

[0046] Air gap between the coil carrier and the armature disk, which is “zero” here.

[0047] Fig. 6 Detail H shows the detailed view of a second and third air gap, which are of equal size here and show their maximum width.

[0048] Fig- 7 a sectional view of the opened brake caliper according to the cutting line

[0049] X - X from Fig. 2

[0050] Fig. 7 Detail J shows the detailed view of a third release element in the form of a square ring located in the recess of the armature disk and a first air gap between the coil carrier and the armature disk, which is “zero” here.

[0051] Fig. 7 Detail K shows the detailed view of a second and third air gap, which are of equal size here and show their maximum width.

[0052] Fig. 7 Detail L shows the detailed view of the third release element in the form of a square ring located in the recess of the armature disk with the brake caliper closed and a first air gap between the coil carrier and the armature disk, which is at its maximum here.

[0053] Fig- 8 a sectional view of the opened brake calliper according to the cutting line

[0054] X - X from Fig. 2

[0055] Fig. 8 Detail M shows a detailed view of a fourth release element in the recess of the coil carrier in the form of a metal ring with a round cross-section and a first air gap between the coil carrier and the armature disk, which is “zero” here.

[0056] Fig. 8 Detail N shows a detailed view of a second and third air gap, which are equal in size here and have their maximum width. Fig. 8 Detail O shows a detailed view of the fourth release element in the form of a metal ring with a round cross-section located in the recess of the coil carrier with the brake caliper closed, and a first air gap between the coil carrier and the armature disk, which is at its maximum here.

[0057] Fig- 9 a sectional view of the opened brake calliper according to section X - X from Fig. 2

[0058] Fig. 9 Detail P the detailed view of the fourth release element located in a recess of the guide element in the form of a metal ring with a round cross-section and a first air gap between the coil carrier and the armature disk, which is “zero” here.

[0059] Fig. 9 Detail Q shows a detailed view of a second and third air gap, which are of equal size here and show their maximum width.

[0060] Fig. 9 Detail R the detailed view of the fourth release element in the recess of the guide element in the form of a metal ring with a round cross-section with the brake calliper closed and a first air gap between the coil carrier and the armature disk, which is maximum here.

[0061] Fig. 10 a sectional view of the opened brake calliper according to section X - X from Fig. 2

[0062] Fig. 10 Detail S shows the detailed view of a first release element in the form of an O-ring located in a recess of the armature disk and the coil carrier and a first air gap between the coil carrier and the armature disk, which is “zero” here.

[0063] Fig. 10 Detail T shows the detailed view of a second and third air gap, which are of equal size here and show their maximum width.

[0064] Fig. 10 Detail U the detailed view of the first release element in the form of an O-ring located in the recess of the armature disk and the coil carrier with the brake caliper closed and a first air gap between the coil carrier and the armature disk, which is maximum here.

[0065] Fig. 11A shows a front view of the fourth clipping element in the form of a metal ring with a round cross-section, wherein the clipping element has a polygonal contour in the form of an ellipse over its circumference. Fig. 11B shows a front view of the fourth clipping element in the form of a metal ring with a round cross-section, wherein the clipping element has a polygonal contour in the form of a hexagonal polygon over its circumference.

[0066] Fig. 1 shows the basic structure of the brake caliper (BR) according to the invention, its attachment to a stationary machine wall, and its assignment to a brake disc (S). The brake caliper (BR) essentially consists of a coil carrier (1) and a counterplate (3) connected to the coil carrier (1) via spacer bushings (4) and second fastening elements (5). It is also conceivable to design the coil carrier (1) and the counterplate (3) in one piece. Associated with the coil carrier (1) is an armature disk (2) that can move parallel to the axis of rotation (R) of the brake disc (S), and which is displaced towards the brake disc (S) via spring elements (6) (not shown) located in bores in the coil carrier (1). The brake caliper (BR) also has a brake frame (7) that is connected to a stationary machine wall (not shown) via first fastening elements (8).Guide elements (9) are fixed in openings in the brake frame (7), on which the coil carrier (1), the armature disk (2) and the counter plate (3) are mounted so as to be displaceable parallel to the axis of rotation (R) of the brake disk (S).

[0067] In the advantageous embodiment described in Fig. 1, the brake frame (7) is arranged approximately in the same plane as the brake disc (S), radially outside the latter. The guide elements (9) can advantageously protrude beyond the side surfaces of the brake frame (7) on both sides. With regard to the components arranged one behind the other in the direction of the rotation axis (R), the advantageous sequence can be realized as follows: coil carrier (1) - armature disc (2) - brake frame (7) with brake disc (S) - counterplate (3).

[0068] All components that experience axial movement parallel to the rotational axis (R) relative to the brake frame (7) and the guide elements (9) can be equipped with suitable bearing elements in the form of plain bearings or roller bearings in the contact areas with the guide elements (9). Within the coil carrier (1) is an electromagnetic coil (1.1) (not shown). When energized, this coil attracts the armature disk (2) toward the coil carrier (1) against the force of the spring elements (6), thereby opening the brake caliper (BR).

[0069] In the event of a failure of the electrical power supply, the brake calliper (BR) can be manually released, i.e. opened, in an emergency by operating the illustrated manual release lever (10) via a mechanism not described in detail here.

[0070] The switching state of the brake calliper (BR), ie whether the brake calliper is in an open or closed state, is monitored by detecting the relative position of the coil carrier (1) and armature disk (2) via one or more switches (11).

[0071] Fig. 2 shows a front view of the brake caliper (BR) with associated brake disc (S). The brake frame (7) is connected to a stationary machine wall (not shown) via first fastening elements (8). The coil carrier (1), the armature disk (2), and the counterplate (3), which is connected to the coil carrier (1) by means of spacer bushings (4) and second fastening elements (5), are mounted on the guide elements (9) of the brake frame (7) so as to be displaceable parallel to the rotational axis (R) of the brake disc (S). Furthermore, a section line X - X is shown, which, among other things, intersects one of the guide elements (9) centrally and which forms the basis of the following illustrations in Fig. 3 to Fig. 9.

[0072] Fig. 3 shows a side view of the brake caliper (BR) including the associated brake disc (S) as a sectional view according to section line X - X in Fig. 2 in the braked state. The central element of the brake caliper (BR) is the brake frame (7), which is connected to a stationary machine wall (not shown) via first connecting elements (8) (not shown). Guide elements (9) are fixed in openings in the brake frame (7), on which guide elements the coil carrier (1), the counterplate (3) connected to the coil carrier (1) and the armature disc (2) are mounted on guide bushes (9.1) so as to be displaceable axially parallel to the guide axis (F) of the guide pin (9) and to the rotation axis (R) of the brake disc (S).Located in the recesses of the coil carrier (1) that are open towards the armature disk (2) are spring elements (6) that apply force from the armature disk (2) to the brake disk (S), the brake disk (S) being mounted so as to be rotatable about the axis of rotation (R) relative to the stationary machine wall. The brake caliper (BR) in Fig. 3 is shown in the braked state, and the brake disk (S) is clamped between the friction linings (2.1) of the armature disk (2) and the friction linings (3.1) of the counterplate (3) by the force of the spring elements (6). According to detail B, the second air gap (L2) and the third air gap (L3) are zero. At the same time, the first air gap (LI) between the coil carrier (1) and the armature disk (2), shown in detail A, reaches its maximum value. Detail A also shows a first release element in the form of an O-ring (12) concentric with the guide axis (F), which is arranged in a circumferential anchor recess (2).2) of the armature disk (2) and can, but need not, be in contact with the circumferential surface (9.3) of the guide element (9) and / or the circumferential surface (2.3) of the armature recess (2.2). In the axial direction parallel to the guide axis (F), the O-ring (12) has no preload. The release element can be formed as a closed, circumferential O-ring (12) or from individual ring segments.

[0073] The brake caliper (BR) in Fig. 4 is shown in the unbraked, i.e. open, state, i.e. the armature disk (2) is pulled towards the coil carrier (1) by the current-carrying magnetic coil (1.1) against the force of the spring elements (6), and the friction linings (2.1, 3.1) of the armature disk (2) and the counterplate (3) are not in contact with the brake disk (S), which can therefore rotate freely about the axis of rotation (R). According to detail D, the second air gap (L2) and the third air gap (L3) between the friction linings (2.1, 3.1) and the brake disk (S) assume their respective maximum values, which are ideally equal when the release mechanism is functioning optimally. Accordingly, when the brake caliper (BR) is open, the first air gap (LI) between the coil carrier (1) and the armature disk (2) assumes its minimum value, which in the illustration in detail C has the value “zero”. The O-ring (12), also shown in detail C, is located between the side surface (2nd4) of the armature recess (2.2) and the side surface (1.4) of the coil carrier (1) and is thus in radial contact with the circumferential surface (9.3) of the guide element (9) and the circumferential surface (2.3) of the armature recess (2.2).

[0074] The release movement of the brake calliper (BR) thus takes place during the transition between the closed position shown in Fig. 3 and the open position of the brake calliper (BR) shown in Fig. 4 and proceeds as follows: - When the magnetic coil (1.1) of the coil carrier (1) is energized, the armature disk (2) initially performs a short first stroke movement towards the coil carrier (1) until the O-ring (12) is lightly clamped axially between the side surface (2.4) of the armature recess (2.2) and the side surface (1.4) of the coil carrier (1) and thereby comes into radial contact with the circumferential surface (9.3) of the guide element (9) and the circumferential surface (2.3) of the armature recess (2.2).

[0075] - Immediately afterwards, the armature disk (2) performs a further second stroke movement towards the coil carrier (1) until the armature disk (2) comes into contact with the coil carrier (1) and thus the air gap (LI) becomes “zero”.

[0076] - During this second stroke movement, the O-ring (12) is further deformed axially, this axial deformation being divided into a first elastic deformation on the side surface (2.4) of the armature recess (2.2) and an equally large second elastic deformation on the side surface (1.4) of the coil carrier (1).

[0077] - The first elastic deformation mentioned above causes the friction lining (2.1) of the armature disc (2) to move away from the brake disc (S) by the third air gap (L3).

[0078] - The said second elastic deformation causes the friction lining (3.1) of the counter plate (3) connected to the coil carrier (1) to move away from the brake disc (S) by the second air gap (L2).

[0079] - Because the described first and second elastic deformations of the O-ring (12) are of equal size, the air gaps (L2, L3) are of equal size when the brake calliper (BR) is open.

[0080] Instead of the O-ring (12), a quad ring (13), a square ring (14) or a metal ring (15) can also be used as a release element.

[0081] Fig. 5 shows a side view of the brake caliper (BR) including the associated brake disc (S) as a sectional view according to section line X - X in Fig. 2 in the braked state. In the recesses of the coil carrier (1) that are open towards the armature disc (2) there are spring elements (6) that apply force from the armature disc (2) to the brake disc (S), whereby the brake disc (S) is mounted so as to be rotatable about the axis of rotation (R) relative to the stationary machine wall. The brake caliper (BR) in Fig. 5 is shown in the braked state and the brake disc (S) is clamped between the friction linings (2.1) of the armature disc (2) and the friction linings (3.1) of the counter plate (3) by the force of the spring elements (6). According to detail F the second air gap (L2) and the third air gap (L3) are zero. At the same time, the first air gap (LI) shown in detail E between the coil carrier (1) and the armature disk (2) reaches its maximum value.Detail E also shows a second release element in the form of a quad ring (13) concentric with the guide axis (F), which lies in a circumferential coil carrier recess (1.2) of the coil carrier (1) and thereby makes contact with the circumferential surface (9.3) of the guide element (9) and / or the circumferential surface.

[0082] (1.3) of the coil carrier recess (1.2) can, but need not, have a preload. In the axial direction parallel to the guide axis (F), the quad ring (13) has no preload. Here, too, the release element can be formed as a closed, circumferential quad ring (13) or from individual ring segments with a cross-section corresponding to the quad ring (13).

[0083] The brake caliper (BR) in Fig. 6 is shown in the unbraked, i.e. open, state, i.e. the armature disk (2) is pulled towards the coil carrier (1) by the current-carrying magnetic coil (1.1) against the force of the spring elements (6), and the friction linings (2.1, 3.1) of the armature disk (2) and the counterplate (3) are not in contact with the brake disk (S), which can therefore rotate freely about the axis of rotation (R). According to detail H, the second air gap (L2) and the third air gap (L3) between the friction linings (2.1, 3.1) and the brake disk (S) assume their respective maximum values, which are ideally equal when the release mechanism is functioning optimally. Accordingly, when the brake caliper (BR) is open, the first air gap (LI) between the coil carrier (1) and the armature disk (2) assumes its minimum value, which in the illustration in detail G has the value “zero”.The quad ring (13), also shown in detail G, is clamped axially between the side surface (1.4) of the coil carrier recess (1.2) and the side surface (2.4) of the armature disk (2) when the brake caliper (BR) is open and is therefore in radial contact with the circumferential surface.

[0084] (9.3) of the guide element (9) and to the peripheral surface (1.3) of the coil carrier recess (1.2).

[0085] The release movement of the brake calliper (BR) thus takes place during the transition between the closed position shown in Fig. 5 and the open position of the brake calliper (BR) shown in Fig. 6 and proceeds as follows:

[0086] - When the magnetic coil (1.1) of the coil carrier (1) is energized, the armature disk (2) initially performs a short first stroke movement towards the coil carrier (1) until the quad ring (13) is lightly clamped axially between the side surface (1.4) of the coil carrier recess (1.2) and the side surface (2.4) of the armature disk (2) and thereby comes into radial contact with the circumferential surface (9.3) of the guide element (9) and the circumferential surface (1.3) of the coil carrier recess (1.2).

[0087] - Immediately afterwards, the armature disk (2) performs a further second stroke movement towards the coil carrier (1) until the armature disk (2) rests against the coil carrier (1) and thus the air gap (LI) becomes “zero”.

[0088] - During this second stroke movement, the quad ring (13) is further deformed axially, this axial deformation being divided into a first elastic deformation on the side surface (1.4) of the coil carrier recess (1.2) and a second elastic deformation of the same size on the side surface (2.4) of the armature disk (2).

[0089] - The said first elastic deformation causes the friction lining (3.1) of the counter plate (3) connected to the coil carrier (1) to move away from the brake disc (S) by the second air gap (L2).

[0090] - The second elastic deformation mentioned above causes the friction lining (2.1) of the armature disc (2) to move away from the brake disc (S) by the third air gap (L3).

[0091] - Because the described first and second elastic deformations of the quad ring (13) are of equal size, the air gaps (L2, L3) are of equal size when the brake calliper (BR) is open.

[0092] Instead of the quad ring (13), an O-ring (12), a square ring (14) or a metal ring (15) can also be used as a release element.

[0093] The brake caliper (BR) in Fig. 7 with detail J and detail K is shown in the unbraked, i.e. open, state, i.e. the armature disk (2) is pulled towards the coil carrier (1) by the energized magnetic coil (1.1) against the force of the spring elements (6) and the friction linings (2.1, 3.1) of the armature disk (2) and the counterplate (3) are not in contact with the brake disk (S), which can therefore rotate freely about the axis of rotation (R). According to detail K, the second air gap (L2) and the third air gap (L3) between the friction linings (2.1, 3.1) and the brake disk (S) assume their respective maximum values, which are ideally equal when the release mechanism is functioning optimally. Accordingly, when the brake caliper (BR) is open, the first air gap (LI) between the coil carrier (1) and the armature disk (2) assumes its minimum value, which in the illustration at detail J has the value “zero”.The third release element in the form of a square ring (14), also shown in detail J, is located in this embodiment in an armature recess (2.2) which is radially delimited by a circumferential surface (2.3) and axially by two side surfaces (2.4), thus forming a circumferential groove closed on three sides. The square ring (14) is only radially preloaded against the circumferential surface (2.3) of the armature recess (2.2) and the circumferential surface (9.3) of the guide element (9). The armature recess (2.2) is preferably designed such that, in the region of its circumferential surface (2.3), it approximately corresponds to the width and geometric shape of the square ring (14), and such that its axial extent increases in the direction parallel to the guide axis (F) towards the guide element (9), so that the two side surfaces (2.4) are inclined to one another at an angle in a range of preferably 10° to 90° and geometrically each form part of a conical surface. Detail L shows the same section as detail J, but in contrast, with the brake caliper (BR) closed. The brake disc (S) is clamped between the friction linings (2.1, 3.1) of the armature disc (2) and the counterplate (3) and the first air gap (LI) between the coil carrier (1) and armature disc (2) has its maximum. The square ring (14) shown in detail L is elastically deformed and takes on the shape of a parallelogram. This deformation from a rectangle to a parallelogram occurs when the brake caliper (BR) transitions from the open state shown in detail J to the closed state shown in detail L because the square ring (14) presses so strongly against the circumferential surfaces (2.3, 9.3) is preloaded by the armature plate (2) and guide element (9) so that no superficial sliding occurs at these contact points. Conversely, when the brake caliper (BR) is opened, a release movement occurs through the square ring (14), in which the square ring (14) moves back from its deformed state shown in detail L to its undeformed state according to detail J, thereby creating the release effect with the equally sized second air gap (L2) and third air gap (L3). Instead of the square ring (14), an O-ring (12), a quad ring (13) or a metal ring (15) can also be used as the release element.

[0094] The brake caliper (BR) in Fig. 8 with details M and N is shown in the unbraked, i.e. open, state, i.e. the armature disk (2) is pulled towards the coil carrier (1) by the energized magnetic coil (1.1) against the force of the spring elements (6) and the friction linings (2.1, 3.1) of the armature disk (2) and the counter plate (3) are not in contact with the brake disk (S), which can therefore rotate freely about the axis of rotation (R). According to detail N, the second air gap (L2) and the third air gap (L3) between the friction linings (2.1, 3.1) and the brake disk (S) assume their respective maximum values, which are ideally equal when the release mechanism is functioning optimally. Accordingly, when the brake caliper (BR) is open, the first air gap (LI) between the coil carrier (1) and the armature disk (2) assumes its minimum value, which in the illustration at detail M has the value “zero”.The fourth release element, also shown in detail M, in the form of a metal ring (15) with a round wire cross-section, is located in this embodiment in a coil carrier recess (1.2) that is radially bounded by a circumferential surface (1.3) and axially by two side surfaces (1.4), thus forming a circumferential groove closed on three sides. The metal ring (15) is only radially preloaded against the circumferential surface (9.3) of the guide element (9) and the circumferential surface (1.3) of the coil carrier recess (1.2). This prestressing of the metal ring (15) is made possible by the fact that the metal ring (15) forms a polygon in the circumferential direction with external contacts (15.1) and internal contacts (15.2) alternating in the circumferential direction, as shown in Fig. 11 A and Fig. 11 B, wherein the external contacts (15.1) are directed towards the coil carrier recess (1.2) and the internal contacts (15.2) are directed towards the guide element (9).

[0095] In the non-deformed state of the metal ring (15) in the direction parallel to the guide axis (F), as shown in detail M, the contact points are located between the external contacts

[0096] (15.1) and the coil carrier recess (1.2) and the contact points between internal contacts

[0097] (15.2) and guide element (9) in one plane. The circumferential surface (1.3) of the coil carrier recess (1.2) preferably has the shape of a circular arc, the radius of which corresponds approximately to the radius of the wire cross-section of the metal ring (15), thus embedding the ring positively in the circumferential surface (1.3). The coil carrier recess (1.2) is preferably designed such that its axial extent increases in a direction parallel to the guide axis (F) towards the guide element (9), so that the two side surfaces (1.4) are inclined to one another at an angle in a range of preferably 10° to 90° and geometrically each form part of a conical surface. Detail O shows the same section as detail M, but in contrast, with the brake caliper (BR) closed. The brake disc (S) is arranged between the friction linings (2.1, 3.1) is clamped by the armature disk (2) and counterplate (3) and the first air gap (LI) between the coil carrier (1) and the armature disk (2) has its maximum. The metal ring (15) shown in detail O is elastically deformed. During this elastic deformation, the metal ring (15) has a shape in which the plane with the contact points between the external contacts (15.1) of the metal ring (15) and the coil carrier recess (1.2) is spaced parallel from the plane with the contact points between the internal contacts (15.2) of the metal ring (15) and the guide element (9). This distance between the two planes comes about during the transition of the brake caliper (BR) from the open state shown in detail M to the closed state shown in detail O because the metal ring (15) presses so strongly against the circumferential surfaces (1.3, 9.3) is pre-tensioned by the coil carrier (1) and guide element (9) or is embedded there in a form-fitting manner so that no superficial sliding occurs at these contact points. Conversely, when the brake caliper (BR) is opened, a release movement takes place through the metal ring (15), in which the metal ring (15) moves back from its deformed state shown in detail O to its undeformed state according to detail M, thereby creating the release effect with the equally large second air gap (L2) and third air gap (L3). Instead of the metal ring (15), an O-ring (12), a quad ring (13) or a square ring (14) can also be used as the release element.

[0098] The brake calliper (BR) in Fig. 9 with detail P and detail Q is shown in the unbraked, i.e. open, state, ie the armature disc (2) is energized by the magnetic coil

[0099] (1.1) is attracted to the coil carrier (1) against the force of the spring elements (6) and the friction linings (2.1, 3.1) of the armature disk (2) and counter plate (3) are not in contact with the brake disk (S), which can thus rotate freely about the rotation axis (R).

[0100] According to detail Q, the second air gap (L2) and the third air gap (L3) between the friction linings (2.1, 3.1) and the brake disc (S) assume their respective maximum values, which are ideally equal when the release mechanism is functioning optimally.

[0101] Accordingly, when the brake caliper (BR) is open, the first air gap (LI) between the coil carrier (1) and the armature disk (2) assumes its minimum value, which in the illustration in detail P has the value "zero". The fourth release element, also shown in detail P, in the form of a metal ring (15) with a round wire cross-section, lies in this embodiment in a guide recess (9.2) of the guide element (9), which is delimited radially by a circumferential surface (9.3) and axially by two side surfaces (9.4) and thus forms a circumferential groove closed on three sides. The metal ring (15) is only preloaded radially against the circumferential surface (9.3) of the guide element (9) and the circumferential surface (1.3) of the coil carrier (1). This prestressing of the metal ring (15) is made possible by the fact that the metal ring (15) as shown in Fig. 11 A and Fig. 11 B forms a polygon in the circumferential direction with external contacts alternating in the circumferential direction

[0102] (15.1) and internal contacts (15.2), wherein the external contacts (15.1) are aligned towards the circumferential surface (1.3) of the coil carrier (1) and the internal contacts (15.2) are aligned towards the circumferential surface (9.3) of the guide element (9). In the non-deformed state of the metal ring (15) in the direction parallel to the guide axis (F), as shown in detail P, the contact points between the external contacts (15.1) and the circumferential surface (1.3) of the coil carrier (1) and the contact points between the internal contacts (15.2) and the circumferential surface (9.3) of the guide element (9) lie in one plane. The circumferential surface (9.3) of the guide recess (9.2) preferably has the shape of a circular arc, the radius of which corresponds approximately to the radius of the wire cross-section of the metal ring (15) and thus embeds the latter in a form-fitting manner in the circumferential surface (9.3).2) is preferably designed such that its axial extent increases in the direction parallel to the guide axis (F) towards the circumferential surface (1.3) of the coil carrier (1), so that the two side surfaces (9.4) are inclined to one another at an angle in a range of preferably 10° to 90° and geometrically each form part of a conical surface. Detail R shows the same section as in detail P, but in contrast, with the brake caliper (BR) closed. The brake disc (S) is clamped between the friction linings (2.1, 3.1) of the armature disc (2) and the counterplate (3) and the first air gap (LI) between the coil carrier (1) and the armature disc (2) is at its maximum. The metal ring (15) shown in detail R is elastically deformed. During this elastic deformation, the metal ring (15) has a shape in which the plane with the contact points between the external contacts (15.1) of the metal ring (15) and the circumferential surface (1.3) of the coil carrier (1) is spaced parallel from the plane with the contact points between the internal contacts (15.2) of the metal ring (15) and the circumferential surface (9.3) of the guide element (9). This spacing between the two planes occurs during the transition of the brake caliper (BR) from the open state shown in detail P to the closed state shown in detail R in that the metal ring (15) is pre-tensioned so strongly against the circumferential surfaces (1.3, 9.3) of the coil carrier (1) and guide element (9) or is embedded there in a form-fitting manner that no superficial sliding occurs at these contact points. Conversely, when the brake calliper (BR) is opened, a release movement takes place through the metal ring (15), in which the metal ring (15) moves back from its deformed state shown in detail R to its undeformed state according to detail P, thereby creating the release effect with the second air gap (L2) and third air gap (L3) of the same size.Instead of the metal ring (15), an O-ring (12), a quad ring (13) or a square ring (14) can also be used as a release element. The brake caliper (BR) in Fig. 10 with detail S and detail T is shown in the unbraked, i.e. open, state, i.e. the armature disk (2) is pulled towards the coil carrier (1) by the energized magnetic coil (1.1) against the force of the spring elements (6) and the friction linings (2.1, 3.1) of the armature disk (2) and counter plate (3) are not in contact with the brake disk (S), which can therefore rotate freely about the rotation axis (R).

[0103] According to detail T, the second air gap (L2) and the third air gap (L3) between the friction linings (2.1, 3.1) and the brake disc (S) assume their respective maximum values, which are ideally equal when the release mechanism is functioning optimally. Accordingly, when the brake caliper (BR) is open, the first air gap (LI) between the coil carrier (1) and the armature disc (2) assumes its minimum value, which has the value "zero" in the illustration in detail S. The first release element in the form of an O-ring (12), also shown in detail S, in this exemplary embodiment lies approximately half in a coil carrier recess (1.2) and half in an armature recess (2.2), which is delimited radially by circumferential surfaces (1.3, 2.3) and axially by two side surfaces (1.4, 2.4). Detail U shows the same section as in detail S, but in contrast, with the brake caliper (BR) closed.

[0104] The brake disc (S) is clamped between the friction linings (2.1, 3.1) of the armature disc (2) and the counter plate (3) and the first air gap (LI) between the coil carrier (1) and the armature disc (2) is at its maximum.

[0105] The release movement of the brake calliper (BR) thus takes place during the transition between the closed position shown in detail U and the open position of the brake calliper (BR) shown in detail S and proceeds as follows:

[0106] - When the magnetic coil (1.1) of the coil carrier (1) is energized, the armature disk (2) initially performs a short first stroke movement towards the coil carrier (1) until the O-ring (12) is lightly axially clamped between the side surface (2.4) of the armature recess (2.2) and the side surface (1.4) of the coil carrier recess (1.2) and thereby comes into radial contact with the circumferential surface (9.3) of the guide element (9) and with the circumferential surfaces (2.3, 1.3) of the armature recess (2.2) and the coil carrier recess (1.2).

[0107] - Immediately afterwards, the armature disk (2) performs a further second stroke movement towards the coil carrier (1) until the armature disk (2) comes into contact with the coil carrier (1) and thus the air gap (LI) becomes “zero”.

[0108] During this second stroke movement, the O-ring (12) is further axially deformed, this axial deformation being divided into a first elastic deformation on the side surface (2.4) of the armature recess (2.2) and an equally large second elastic deformation on the side surface (1.4) of the coil carrier recess (1.2).

[0109] - The first elastic deformation mentioned above causes the friction lining (2.1) of the armature disc (2) to move away from the brake disc (S) by the third air gap (L3).

[0110] - The said second elastic deformation causes the friction lining (3.1) of the counter plate (3) connected to the coil carrier (1) to move away from the brake disc (S) by the second air gap (L2).

[0111] - Because the described first and second elastic deformations of the O-ring (12) are of equal size, the air gaps (L2, L3) are of equal size when the brake calliper (BR) is open.

[0112] Instead of the O-ring (12), a quad ring (13), a square ring (14) or a metal ring (15) can also be used as a release element.

[0113] Fig. 11 A shows a first advantageous embodiment of the metal ring (15), which has a polygonal shape over the circumference, which in the present example corresponds to an ellipse.

[0114] The metal ring (15) has alternating outer contacts (15.1) and inner contacts (15.2) around its circumference, which are located on an enveloping circle (15.4) and an inner circle (15.5), respectively. The outer contacts (15.1) are designed to come into contact with a peripheral surface (1.3, 2.3) of the coil carrier (1) or the armature disk (2), and the inner contacts (15.2) are designed to come into contact with a peripheral surface (9.3) of the guide element (9). To achieve increased flexibility and to enable simple assembly, the metal ring (15) has an interruption (15.3), which can be located either in the area of ​​an outer contact (15.1) or in the area of ​​an inner contact (15.2), or in an intermediate area.

[0115] Fig. 11 B shows a second advantageous embodiment of the metal ring (15), which has a polygonal shape around its circumference, which in the present example corresponds to a hexagonal polygon. The metal ring (15) has alternating outer contacts (15.1) and inner contacts (15.2) around its circumference, which are located on an enveloping circle (15.4) and an inner circle (15.5) respectively, and which are intended to come into contact with a peripheral surface (1.3, 2.3) of the coil carrier (1) or the armature disk (2) or with a peripheral surface (9.3) of the guide element (9). For the reasons stated above, the metal ring (15) in Fig. 11 B also has an interruption (15.3), which in the example in Fig. 11 B is located on an inner contact (15.2).

[0116] In contrast to the embodiments shown, the metal ring (15) can be designed as a polygon with "N" radially outward-pointing corners, wherein the variable "N" can practically assume a value between 2 and 20, with a value "N" of 2 to 6 being considered very advantageous. Different or equal distances between external contacts (15.1) and internal contacts (15.2) are possible around the circumference of the metal ring (15). The cross-section of the metal ring (15) can be round, polygonal, or polygonal, with versions with round, elliptical, and square cross-sections being considered particularly advantageous. The metal ring (15) can be made from all conceivable metal alloys that have sufficient elasticity and rigidity and that are in contact with the circumferential surface (1.3, 2.3) of the coil carrier (1) or the armature disk (2) and in contact with the circumferential surface (9.3) the guide element (9) has the required tribological properties with low wear rates.

[0117] List of reference symbols Coil carrier 15.1 Outer contact Magnetic coil 15.2 Inner contact Coil carrier recess 15.3 Interruption Circumferential surface 15.4 Enveloping circle Side surface 15.5 Inner circle Armature plate Friction lining BR Brake calliper Armature recess F Guide axis Circumferential surface LI First air gap Side surface L2 Second air gap Counter plate L3 Third air gap Friction lining R Rotation axis Spacer bush S Brake disc Second fastening element Spring element Brake frame First fastening element Guide element Guide bush Guide recess Circumferential surface Side surface Manual release lever Switch O-ring Quad ring Square ring Metal ring

Claims

Patent claims 1. Electromagnetically released brake calliper (BR) for braking a brake disc (S) mounted so as to be rotatable about an axis of rotation (R), the brake calliper (BR) having a brake frame (7) connected to a stationary machine wall and having one or more guide elements (9), at least one coil carrier (1), an armature disc (2) and a counter-plate (3) being arranged on the guide elements (9) so as to be displaceable essentially parallel to the axis of rotation (R) of the brake disc (S), the coil carrier (1) having a magnetic coil (1.1) for attracting an armature disc (2) and spring elements (6) for pushing the armature disc (2) away, the coil carrier (1) and the counter-plate (3) being connected to one another or being of one-piece construction in such a way that they encompass the brake disc (S) in a U-shape and that frictional contact between the friction linings (2.1, 3.1) the armature disk (2) and the counter-plate (3) with the opposing flat surfaces of the brake disk (S) by the force of the spring elements (6), wherein the braking effect is canceled by energizing the magnetic coil (1.1) and attracting the armature disk (2) towards the coil carrier (1) against the force of the spring elements (6), and wherein the brake calliper (BR) has a release mechanism in order to prevent contact between the friction linings (2.1, 3.1) and the brake disk (S) when the brake calliper (BR) is open, characterized in that in the region of the guide of the brake calliper (BR) between the at least one guide element (9) and the at least one coil carrier (1) or the at least one armature disk (2) in at least one recess (1.2, 2.2, 9.2) at least one annular release element (12, 13, 14, 15) is arranged in a completely circumferential form or provided with at least one interruption (15.3).

2. Brake calliper (BR) with a release mechanism according to claim 1, characterized in that in the coil carrier (1) or in the armature disk (2) at least one recess (1.2, 2.2) is introduced, which in the radial direction by a circumferential surface (1.3, 2.3) and in the axial direction by a side surface (1.4, 2.4) of the respective component itself and by a side surface (2.4, 1.4) of the adjacent component, i.e. the armature disk (2) or the coil carrier (1).

3. Brake caliper (BR) with a free-acting mechanism according to claim 1, characterized in that at least one recess (1.2, 2.2) is introduced into the coil carrier (1) and in the armature disk (2), which is formed in the radial direction by a circumferential surface (1.3, 2.3) and in the axial direction by a side surface (1.4, 2.4) of the relevant component itself and by a side surface (2.4, 1.4) of the adjacent component, i.e. the armature disk (2) or the coil carrier (1).

4. Brake caliper (BR) with a release mechanism according to claim 2 or 3, characterized in that the annular release element (12, 13, 14, 15) is not or only slightly prestressed in the axial and / or radial direction when the brake caliper (BR) is closed.

5. Brake caliper (BR) with a release mechanism according to claim 2 or 3, characterized in that the annular release element (12, 13, 14, 15) is prestressed in the axial and radial directions by the coil carrier (1) and the armature disk (2) when the brake caliper (BR) is open.

6. Brake caliper (BR) with a release mechanism according to claim 2 or 3, characterized in that the annular release element (12, 13, 14, 15), which is not preloaded when the brake caliper (BR) is closed, experiences an axial preload in a first phase when the brake caliper (BR) is opened by the coil carrier (1) and the armature disk (2) until the release element (12, 13, 14, 15) comes into frictional contact with one of the circumferential surfaces (1.3, 2.3) of the coil carrier (1) or armature disk (2) and with the circumferential surface (9.3) of the guide element (9), and that the release element (12, 13, 14, 15) experiences a further axial preload in a second phase, which is divided equally between the coil carrier (1) and the armature disk (2) and which leads to the fact that, when the brake caliper (BR) is opened, between the friction linings (2.1, 3.1) and set equal air gaps (L2, L3) on both sides of the brake disc (S).

7. Brake caliper (BR) with a free-adjusting mechanism according to claim 1, characterized in that at least one recess (1.2, 2.2) is introduced into the coil carrier (1) or in the armature disk (2), which recess is formed in the radial direction by a circumferential surface (1.3, 2.3) and in the axial direction by two side surfaces (1.4, 2.4) of the relevant component itself.

8. Brake caliper (BR) with a release mechanism according to claim 7, characterized in that the axial width of the recess (1.2, 2.2) in the region of the respective circumferential surface (1.3, 2.3) is adapted to the width and shape of the annular release element (12, 13, 14, 15) and that the axial width of the recess (1.2, 2.2) running parallel to a guide axis (F) increases towards the guide element (9) so that the two side surfaces are inclined towards one another and thereby enclose an angle of preferably 10° to 90°.

9. Brake caliper (BR) with a release mechanism according to claim 7, characterized in that the annular release element (12, 13, 14, 15) is permanently prestressed in the radial direction between the circumferential surfaces (1.3, 2.3) of the coil carrier (1) or the armature disk (2) and the circumferential surface (9.3) of the guide element (9).

10. (BR) with a release mechanism according to claim 7, characterized in that the annular release element (12, 13, 14, 15) has an axial preload parallel to the guide axis (F) between its contact area on the circumferential surface (1.3, 2.3) of the coil carrier (1) or the armature disk (2) and its contact area on the circumferential surface (9.3) of the guide element (9) when the brake caliper (BR) is closed, and that the release element (12, 13, 14, 15) changes into a state which is not preloaded in the axial direction when the brake caliper (BR) is opened, as a result of which air gaps (L2, L3) of equal size are established between the friction linings (2.1, 3.1) and the two sides of the brake disk (S) when the brake caliper (BR) is open.

11. Brake caliper (BR) with a free-adjusting mechanism according to claim 1, characterized in that at least one guide recess (9.2) is introduced into the guide element (9), which is formed in the radial direction by a circumferential surface (9.3) and in the axial direction by two side surfaces (9.4) of the guide recess (9.2).

12. Brake caliper (BR) with a release mechanism according to claim 11, characterized in that the axial width of the guide recess (9.2) in the region of the circumferential surface (9.3) is adapted to the width and shape of the annular release element (12, 13, 14, 15) and that the axial width of the guide recess (9.2) running parallel to the guide axis (F) increases towards the coil carrier (1) and the armature disk (2), so that the two side surfaces are inclined towards one another and thereby enclose an angle of preferably 10° to 90°.

13. Brake caliper (BR) with a release mechanism according to claim 11, characterized in that the annular release element (12, 13, 14, 15) is permanently prestressed in the radial direction between the circumferential surface (9.3) of the guide element (9) and the circumferential surface (1.3, 2.3) of the coil carrier (1) or the armature disk (2).

14. Brake caliper (BR) with a release mechanism according to claim 11, characterized in that the annular release element (12, 13, 14, 15) has an axial preload parallel to the guide axis (F) between its contact area on the circumferential surface (9.3) of the guide element (9) and its contact area on the circumferential surface (1.3, 2.3) of the coil carrier (1) or the armature disk (2) when the brake caliper (BR) is closed, and that the release element (12, 13, 14, 15) changes into a state not preloaded in the axial direction when the brake caliper (BR) is opened, as a result of which equal air gaps (L2, L3) are established between the friction linings (2.1, 3.1) and the two sides of the brake disk (S) when the brake caliper (BR) is open.

15. Brake caliper (BR) with a release mechanism according to one of the preceding claims, characterized in that the release element (12, 13, 14, 15) is a ring concentric with the guide axis (F) which, in its front view, has a circumferential circular or polygonal contour.

16. Brake calliper (BR) with a release mechanism according to one of the preceding claims, characterized in that the release element (12, 13, 14, 15) is designed as a ring with a circular cross-section or a polygonal cross-section or a multi-edged cross-section or a cross-section corresponding to a commercially available quad ring.

17. Brake caliper (BR) with a release mechanism according to one of the preceding claims, characterized in that the release element (12, 13, 14, 15) is made of or coated with a rubber-elastic material or an elastic plastic or a metal alloy.

18. Brake caliper (BR) with a release mechanism according to one of the preceding claims, characterized in that the release element (12, 13, 14, 15) is designed as an O-ring (12) or as a quad ring (13) or as a square ring (14) or as a metal ring (15).

19. Brake caliper (BR) with a free-adjusting mechanism according to one of the preceding claims, characterized in that the guide element (9) and the complementary openings of the coil carrier (1) and armature disk (2) have a polygonal or polygonal cross-section.

20. Brake caliper (BR) according to one of the preceding claims, characterized in that the release mechanism has only one recess (1.2, 2.2, 9.2) with several release rings (12, 13, 14, 15) arranged axially one behind the other or has several recesses (1.2, 2.2, 9.2) each with at least one release ring (12, 13, 14, 15).

Images