Balancing ring with compensating elements

Abstract

Balancing ring (10) with several movable and fixable compensating elements (100), wherein the balancing ring (10) comprises a top (12) and a bottom (13) as well as a circumferential outer surface, characterized in that the balancing ring comprises a circumferential trough-shaped recess (14) opening in the direction of the circumferential outer surface with a back wall and two adjoining cheeks, wherein the compensating elements (100) are arranged in the trough-shaped recess (14) and the compensating elements (100) are held in the trough-shaped recess (14) by means of a retaining profile (103, 16).

Description

[0001] The present invention relates to a balancing ring with movable and fixable balancing elements. State of the art

[0002] Rotating components often exhibit mass imbalances due to manufacturing tolerances, material inhomogeneities, or asymmetrical geometries. During rotation, these imbalances generate moments that can manifest as vibrations, increased wear, noise, and reduced machining accuracy. These effects become particularly significant at higher rotational speeds and can considerably shorten the service life of components such as bearings, spindles, and tools.

[0003] When balancing rotating components, a distinction is usually made between coarse balancing and fine balancing. Coarse balancing serves to reduce an initially existing, comparatively large imbalance and to bring the rotating system into a range where more precise balancing is even possible or economically viable.

[0004] This often involves using larger compensating masses or removing material on a larger scale, but the achievable accuracy is limited.

[0005] Rough balancing is typically followed by fine balancing, in which any remaining imbalances are compensated for with high precision. Fine balancing is performed using smaller balancing masses or finely adjustable balancing elements, such as balancing blocks, adjusting screws, or movable mass elements. The goal of fine balancing is to reduce the imbalance below predefined limits, which are particularly important at high speeds to minimize vibrations.

[0006] In machine tool operation, tools are frequently used at high speeds. Even slight mass imbalances in tools or tool holders can negatively affect machining accuracy, the surface finish of workpieces, and the service life of the tool, spindle, and bearings. Therefore, precise balancing of the rotating components is of particular importance for use in machine tools.

[0007] Special balancing machines are typically used for balancing. In such machines, the tool, tool holder, or, more generally, any component intended for rotation is set into rotation. Sensors in the balancing machine detect the existing imbalance and determine its magnitude and angular position. Based on this measurement data, the imbalance can be corrected by targeted mass adjustments.

[0008] For example, EP 2 924 853 A1 discloses a rotor of a rotary dynamoelectric machine which has a circumferential groove on one end face, having an outwardly tapered cross-section. One or more slot inserts are inserted into this groove and can be moved in their position. Depending on the detectable imbalance, the slot inserts can be positioned and fixed accordingly to compensate for the imbalance.

[0009] German patent DE 102 06 284 A1 relates to a grinding wheel holder. In the end faces of the grinding wheel holder, an annular groove is provided with two different groups of balancing stones. The balancing stones can be moved within the annular groove in their angular position and fixed in place for manual balancing in order to compensate for imbalance.

[0010] For precise balancing, especially of rotating components that extend lengthwise, it is often helpful to compensate for existing imbalances in two or more planes along the length of the rotating component, so that tilting imbalances can also be corrected. With this so-called dynamic balancing, conventional balancing methods, especially fine balancing, are often cumbersome and not very user-friendly.

[0011] Against this background, the invention aims to provide an improved method for balancing rotating components. In particular, it aims to provide a balancing method that allows for the precise balancing of the respective rotating component, whereby the balancing process is to be carried out in a particularly user-friendly manner and with minimal effort and time. Disclosure of the invention

[0012] This problem is solved by a balancing ring, the design of which is defined in claim 1. Preferred embodiments of the balancing ring are defined in the dependent claims.

[0013] The balancing ring according to the invention comprises several, preferably two or three, slidable and fixable balancing elements, which can also be referred to as balancing elements or balancing blocks. The balancing ring has a top and a bottom surface as well as a circumferential outer surface. According to the invention, the balancing ring is characterized in that the balancing ring comprises a circumferential, channel-shaped recess opening towards the circumferential outer surface. The channel-shaped recess is bounded by a back wall and two adjoining sides. The balancing elements are arranged in the channel-shaped recess, wherein the balancing elements are held in the channel-shaped recess by means of a retaining profile.

[0014] The compensating elements are designed to be inserted into the groove-shaped recess during the assembly of the balancing ring. The compensating elements can be moved around the circumference of the balancing ring within the groove-shaped recess and fixed in a desired position during the balancing process.

[0015] The arrangement and opening of the channel-shaped recess on the outside of the balancing ring offers the particular advantage that the balancing elements are accessible from the side. In contrast, in comparable balancing rings from the prior art, the balancing elements are generally arranged in a groove or slot on the end face of the balancing element, meaning that with prior art balancing elements, actuation or displacement of the balancing elements is only possible from the respective end face. Such balancing elements therefore generally do not allow balancing in multiple planes of the rotating component. The balancing ring according to the invention, however, can be used very flexibly on different planes of the respective rotating component. The balancing elements are readily accessible from the outside, so that they can be positioned in a very user-friendly manner.The balancing elements are directly accessible from the side and can be moved and fixed as needed without having to remove the rotating component from a balancing machine, for example. A subsequent run in the balancing machine for further measurement and inspection of the rotating component can therefore be connected directly.

[0016] A further advantage of the balancing ring according to the invention compared to comparable conventional balancing elements is that the balancing elements are held in the groove-shaped recess of the balancing ring according to the invention by a retaining profile. This means that the balancing elements are slidable within the groove-shaped recess before being fixed, but cannot fall out of the groove-shaped recess. This is often different with comparable conventional balancing rings. If no special measures are taken, the balancing elements in conventional balancing rings can fall out of the end-face groove or slot before being fixed, which makes handling conventional balancing rings considerably more cumbersome and prone to errors.

[0017] In particularly preferred embodiments, the retaining profile is formed by both retaining structures on the compensating elements and retaining structures on the sides of the trough-shaped recess.

[0018] In preferred embodiments, the channel-shaped recess can have an approximately rectangular cross-section with further structural features (retaining structures) on the sides of the channel-shaped recess. "Approximately rectangular" here means that the angle may deviate from a right angle by up to 3°, preferably by up to 1°. Preferably, the cross-section is exactly rectangular (90°).

[0019] In an embodiment with an approximately rectangular cross-section or rectangular cross-section of the trough-shaped recess, the compensating elements preferably have adapted, for example complementary, structural features (retaining structures) so that the retaining profile is formed in the interaction of these various structural features.

[0020] In particularly preferred embodiments with an approximately rectangular or right-angled cross-section of the channel-shaped recess, the retaining structures comprise at least one, preferably two, grooves extending in a semi-annular orientation on the compensating elements, as well as concentrically extending projections on the sides of the channel-shaped recess. The projections on the sides of the channel-shaped recess engage in the grooves of the compensating elements. These concentrically extending projections on the sides of the channel-shaped recess and these grooves of the compensating elements interlock in a tongue-and-groove manner. This allows the compensating elements to be moved within the channel-shaped recess as if on rails around the circumference of the balancing ring. Simultaneously, the interlocking of the projections and grooves securely holds the compensating elements in the channel-shaped recess.This design has the particular advantage that the wall thickness of the cheeks can be relatively small. For a balancing ring with an inner diameter of, for example, 20 mm, a wall thickness of approximately 2 mm is sufficient.

[0021] In other embodiments with an approximately rectangular or right-angled cross-section of the channel-shaped recess, the grooves can be located on the sides of the channel-shaped recess, and the complementary projections can be located on those sides of the compensating elements facing the sides, i.e., on opposite sides of the compensating elements. In principle, it is also possible for a concentric projection to be provided on one side of the channel-shaped recess and a concentric groove on the other side. Similarly, in this embodiment, the compensating elements would have a groove on one side and a projection on the opposite side.

[0022] Preferably, the balancing ring according to the invention is manufactured from two parts, an upper part and a lower part, which form the base body of the balancing ring. During assembly, the balancing elements are inserted into the groove-shaped recess formed in the base body before the two parts are firmly joined together, for example by pressing and / or gluing.

[0023] The size of the balancing ring is best adapted to the specific requirements. Common sizes for preferred balancing rings include those with an inner diameter of 20 mm, 30 mm, 40 mm, or 75 mm. The outer diameter of the balancing ring can be adjusted to the inner diameter, for example, 45 mm, 55 mm, 65 mm, or 90 mm. Of course, other sizes are also possible. A balancing ring with an inner diameter of 20 mm, for instance, is a widely used EU standard size. In the woodworking industry, inner diameters of 30 mm or 40 mm are common. In the USA, different inner diameters may be used, which are usually specified in inches.

[0024] The balancing elements themselves preferably have a semi-ring-shaped geometry and are radially curved overall to match the size of the balancing ring.

[0025] The weight of each balancing element is also conveniently adapted to the dimensions of the balancing ring. For example, for a balancing ring with an inner diameter of 20 mm, the weight of the individual balancing elements can range from approximately 4 to 6 g.

[0026] To fix the compensating elements at the desired location on the circumference of the channel-shaped recess of the balancing ring, a transverse bore is preferably provided in the compensating elements. The transverse bore preferably runs perpendicular to the semi-annular orientation. The transverse bore is preferably designed to accommodate a fixing element. A threaded bolt is particularly suitable as a fixing element. To fix the compensating element in the desired position, the threaded bolt can, for example, be screwed in from the outside so that, in its final position, the threaded bolt presses against the back wall of the channel-shaped recess, thus clamping the compensating element against the retaining profile, for example, against the projections in the sides of the channel-shaped recess. In this way, the compensating element is stably fixed in the desired position, allowing imbalances to be compensated.

[0027] Preferably, the balancing ring according to the invention has exactly two balancing elements. In other embodiments, for example, three or more balancing elements may be provided.

[0028] To compensate for imbalances in the rotating component, the balancing elements are moved to the required positions around the circumference of the groove-shaped recess and fixed in place. Initially, the balancing elements may be positioned and fixed evenly distributed around the circumference of the balancing ring. With two balancing elements, for example, they would be located directly opposite each other. During the measurement process in the balancing machine, the required angle is determined by which one of the balancing elements should be moved and re-fixed to correct the existing imbalance.

[0029] In preferred embodiments, the compensating elements together have a longitudinal extent in the partial ring direction which is between 10 and 50%, preferably between 10 and 30%, of the total circumference of the channel-shaped recess. This size of the compensating elements generally allows for a very satisfactory compensation of detectable imbalances in a rotating component.

[0030] To facilitate and guide the movement of the balancing elements during the balancing process, the balancing ring preferably features an angle scale. Advantageously, the angle scale is located on the outer edge of the balancing ring. The angle scale can, for example, have 36 evenly spaced markings. Furthermore, the balancing elements can also preferably each have an orientation mark in their center to facilitate their positioning on the circumference of the groove-shaped recess.

[0031] The balancing ring according to the invention is particularly advantageous for fine balancing in machine tools, especially for fine balancing of rotating tools and tool holders on machine tools designed for operation at high speeds. The balancing ring according to the invention can also be used for balancing, for example, rotors or other spindle components.

[0032] The balancing ring according to the invention can, for example, be used for static balancing in a plane of the axis of the rotating component. With particular advantage, the balancing ring according to the invention, or two or more balancing rings according to the invention, can be used for the dynamic balancing of rotating components by being used at several positions, i.e., planes, along the length of the axis of the rotating component.

[0033] Depending on the application, it may be advantageous if the balancing ring according to the invention is provided with corrosion protection.

[0034] In particularly preferred embodiments, the balancing ring is designed as an intermediate ring that can be modularly integrated, for example, into the axes of rotating tool parts or other rotating components. The balancing ring according to the invention has the advantage that it can, in principle, be attached at one or more different locations on the axis of a rotating component and can thus be used for static or, particularly preferably, dynamic balancing.

[0035] The intermediate ring according to the invention can be used with particular advantage for fine balancing of grinding mandrels and milling mandrels. The intermediate ring can be designed, in particular, for installation in the fully assembled state of the rotating tool parts or other rotating components.

[0036] Advantageously, the intermediate ring is designed in such a way that it can be installed without interference edges in the axis of the tool part or, more generally, the rotating component.

[0037] In a further embodiment of the balancing ring according to the invention, the balancing ring is firmly integrated into a tool part intended for rotation, for example into a tool spindle.

[0038] In further embodiments of the balancing ring according to the invention, the balancing ring is integrated into a screw or a nut. Integrating the balancing ring into a screw has the particular advantage that, firstly, the use of such a screw provides a conventional screw function. Secondly, the integrated balancing ring makes it possible to balance the rotating component fitted with the screw in a particularly advantageous manner.

[0039] Similarly, the design of a nut with an integrated balancing ring offers the particular advantage that, firstly, the use of such a nut provides a nut function. Secondly, the integrated balancing ring makes it possible to balance the rotating component fitted with the nut in a particularly advantageous manner.

[0040] In a further embodiment of the balancing ring according to the invention, the balancing ring is integrated into a clamping nut. In a particularly preferred manner, the clamping nut is provided with an undercut profile for the engagement of an actuating means, as described, for example, in DE 10 2009 006 520 B4. The design of a clamping nut with an integrated balancing ring has the particular advantage that, firstly, the use of such a clamping nut provides a function for clamping, for example, a tool element. Secondly, the integrated balancing ring makes it possible to balance the rotating component fitted with the clamping nut in a particularly advantageous manner.

[0041] In a further embodiment of the balancing ring according to the invention, the balancing ring is integrated into a cover element. The cover element can, for example, be designed as a cover disc, for instance for a milling cutter set (e.g., a wood milling cutter arbor). The end milling cutter can then be clamped to the cover element.

[0042] To prevent the cover plate from twisting, it can, for example, be fixed using three screws, with the cover element being designed as a three-hole plate. In other configurations, for example, a central hole and fixing with a single screw can be provided.

[0043] The design of such a cover element with an integrated balancing ring has the particular advantage that its use provides a finishing function, for example, during the assembly of a tool set, such as a milling cutter set. Furthermore, the integrated balancing ring makes it possible to balance the rotating component fitted with the cover element in a particularly advantageous manner.

[0044] The use of a balancing ring according to the invention in the form of a cover disc is particularly suitable for milling mandrels, since the individual milling discs generally protrude laterally from the axis, so that the compensating elements of the balancing ring according to the invention are also easily accessible from the side at the end of the milling mandrel.

[0045] In addition to the cover element according to the invention, especially in the case of a milling mandrel, a further balancing ring according to the invention can be used in the form of an intermediate ring in the middle area of ​​the axis of the milling mandrel, so that dynamic balancing in two planes can take place.

[0046] Two or more balancing rings according to the invention can also be advantageously integrated into other rotating components. Particularly preferred, for example, is the combination of a screw according to the invention with an integrated balancing ring and an intermediate ring according to the invention, or the combination of a nut according to the invention with an integrated balancing ring and an intermediate ring according to the invention, or the combination of a clamping nut according to the invention with an integrated balancing ring and an intermediate ring according to the invention, or the combination of a cover element according to the invention with an integrated balancing ring and an intermediate ring according to the invention.

[0047] In a further embodiment of the balancing ring according to the invention, the balancing ring is characterized in that it is divided into two connectable parts transversely to its ring shape. In this embodiment, the balancing ring comprises two half-rings that can be mounted on the axis of a component intended for rotation. Preferably, the balancing ring in this embodiment is designed as an intermediate ring. In this embodiment, it is possible to subsequently attach the balancing ring to the axis of a tool part or other rotating component at one or more positions if, for example, sliding it onto the axis or other integration is not possible. This embodiment is also particularly suitable for subsequent installation of the balancing ring on, for example, a machine shaft or other axes with insurmountable obstacles. Brief description of the drawings

[0048] Further advantages and features of the invention will become apparent from the following description of exemplary embodiments in conjunction with the drawings. The individual features can be implemented individually or in combination with one another.

[0049] The figures show Fig. 1 Balancing ring in an embodiment as an intermediate ring with two compensating elements (A - isometric side view; B - cross-section; C - longitudinal section); Fig. 2 Compensating element as part of the balancing ring (A and B - isometric side views; C - longitudinal section; D - cross section; E - top view of the upper longitudinal side); Fig. 3 Tool spindle with integrated balancing ring (A - isometric side view; B - cross-section through the balancing ring; C - longitudinal section through the tool spindle); Fig. 4 Screw with integrated balancing ring (A - isometric side view; B - isometric view obliquely from above; C - cross-section through the balancing ring; D - longitudinal section through the screw); Fig. 5 Nut with integrated balancing ring (A - isometric view obliquely from below; B - isometric view obliquely from above; C - cross-section through the balancing ring; D - longitudinal section through the nut); Fig. 6 Clamping nut with integrated balancing ring (A - isometric view obliquely from one side; B - isometric view obliquely from the other side; C - cross-section through the balancing ring; D - longitudinal section through the clamping nut); Fig. 7 Cover plate with integrated balancing ring (A - isometric view obliquely from below; B - isometric view obliquely from above; C - cross-section through the balancing ring; D - longitudinal section through the cover plate); Fig. 8 Balancing ring in an embodiment as a two-part intermediate ring (A - isometric side view; B - cross-section through the two-part intermediate ring in the area of ​​the balancing ring; C - longitudinal section through the balancing ring; D - cross-section through the two-part intermediate ring in the area below the balancing ring); Fig. 9 Balancing ring with three compensating elements in an embodiment as an intermediate ring (A - isometric oblique side view; B - view from the narrow side; C - cross-section); Fig. 10 Schematic representations of possible holding structures of the balancing ring according to the invention (partial figures A - F); and Fig. 11 Isometric side view of a grinding mandrel with balancing ring according to the invention as an intermediate ring. Exemplary embodiments of the invention

[0050] Fig. Figure 1 shows a balancing ring 10 according to the invention in the form of an intermediate ring. Partial figure A shows an isometric side view, partial figure B a cross-section and Fig. C a longitudinal section through the intermediate ring or the balancing ring 10.

[0051] The balancing ring 10 comprises a central opening 11, a top surface 12, and a bottom surface 13. Between the top surface 12 and the bottom surface 13, a circumferential, channel-shaped recess 14 with a rectangular cross-section is formed in the area of ​​the outer casing. The recess 14 comprises a back wall 15, which is oriented towards the inner, central opening 11, and two adjacent sides. Within the channel-shaped recess 14 are two compensating elements 100 distributed around the circumference of the balancing ring. Each compensating element 100 comprises a transverse bore 101, which is provided with a fixing means 102, preferably a threaded bolt. The compensating elements 100 are held in the channel-shaped recess 14 by means of a retaining profile. For this purpose, longitudinal grooves 103 are formed on two opposite sides of each compensating element 100 in this embodiment (see Figure 1). Fig. C) These grooves 103 are oriented such that they are guided by concentric projections 16 located on the sides of the channel-shaped recess 14, allowing the compensating elements 100 to slide on the projections 16 within the channel-shaped recess 14 in their unfixed position. By actuating the fixing element in the transverse bore 101 of the compensating elements 100, in particular by screwing in the threaded bolts 102, the fixing element is pressed against the rear wall of the channel-shaped recess 14. This pushes the compensating elements 100 outwards and clamps them against the projections 16, thus fixing them securely.

[0052] When using the balancing ring 10 according to the invention, the balancing ring 10 or the intermediate ring 10 is installed in the axis of a component intended for rotation. To measure any existing imbalances in the rotating component, a balancing machine known per se is advantageously used, into which the component is clamped. Any existing imbalance can be detected and quantified using appropriate sensors. To compensate for any imbalances present in the rotating component, the balancing elements 100 are moved to the required positions on the circumference of the channel-shaped recess 14 and fixed. In the initial state, one of the balancing elements 100 may already be permanently fixed. The other balancing element 100 is moved, for example by hand, to the required position depending on the detected imbalance and fixed using the fixing means 102.

[0053] To simplify the displacement and positioning of the compensating elements 100, an angle scale 17 is provided on the lower side of the intermediate ring 100, comprising, for example, 36 evenly distributed markings. For better orientation during displacement, a transverse orientation mark 104 is also provided on the compensating elements 100 in the central area in this embodiment.

[0054] As in Fig. As can be seen in Figure C, the balancing ring 10 is composed of an upper part 18 and a lower part 19. During the manufacture of the balancing ring 10, before the two parts 18 and 19 are assembled, the compensating elements 100 are inserted into the groove-shaped recess 14 formed between the two parts, before the upper part 18 and the lower part 19 are firmly joined together, for example by gluing and pressing. Subsequently, the assembled balancing ring 10 can be ground flat if necessary.

[0055] Fig. Figure 2 shows a balancing element 100 of the balancing ring according to the invention in an isolated representation in various views. Sub-figures A and B show isometric side views. Fig. C shows a longitudinal section and the Fig. Figure D shows a cross-section through the compensating element 100. Partial figure E shows a top view of the upper longitudinal side of the compensating element 100. The transverse bore 101, which is provided for receiving a fixing means (not shown here), can be seen. Also visible are the longitudinally extending grooves 103 on the opposite longitudinal sides of the compensating elements 100 and the orientation mark 104 in the form of a notch, located at the level of the transverse bore 101.

[0056] Fig. Figure 3 shows a further preferred embodiment of the balancing ring 10 according to the invention, wherein the balancing ring 10 is fixedly integrated into a tool part 20. Partial figure A shows an isometric side view of the tool part 20. Partial figure B shows a cross-section through the area with the fixedly integrated balancing ring 10. Fig. C shows a longitudinal section through the tool part 20. The permanently integrated balancing ring 10 corresponds to the one shown in the Fig. 1 and Fig. 2. Balancing ring 10 explained. Regarding the details of the balancing ring 10 in this embodiment, reference is made to the explanations relating to the Fig. 1 and Fig. 2 referred.

[0057] The tool component 20 is, in particular, a tool spindle equipped with a conventional chuck 21 for clamping tool elements (for example, drills, milling cutters, or grinders). The balancing ring 10 according to the invention is firmly fixed in the upper region of the tool spindle, for example, by screwing or gluing. When the fully assembled tool with the clamped tool element is clamped into a balancing machine, the compensating elements 100 of the balancing ring 10 according to the invention remain easily accessible from the outside, so that any imbalances detected can be easily adjusted by moving and fixing the compensating elements 100 without having to remove the tool from the balancing machine.

[0058] Fig. Figure 4 shows a further embodiment of the balancing ring 10 according to the invention, wherein in this embodiment the balancing ring 10 is firmly integrated into a screw 30 with an external thread 31. Partial figure A shows an isometric side view of the screw 30. Partial figure B shows an isometric oblique view from above with a hexagon for actuating the screw. Fig. Figure C shows a cross-section through the area of ​​the integrated balancing ring 10 and the Fig. Figure D shows a longitudinal section through screw 30. The permanently integrated balancing ring 10 corresponds to the one shown in the Fig. 1 and Fig. 2. Balancing ring 10 explained. Regarding the details of the balancing ring 10 in this embodiment, reference is made to the explanations relating to the Fig. 1 and Fig. 2 referred.

[0059] Fig. Figure 5 shows a further embodiment of the balancing ring 10 according to the invention, wherein in this embodiment the balancing ring 10 is firmly integrated into a nut 40 (hexagonal nut) with an internal thread 41. Partial figure A shows an isometric side view of the nut 40. Partial figure B shows an isometric oblique view from above. Fig. Figure C shows a cross-section through the area of ​​the integrated balancing ring 10 and the Fig. Figure D shows a longitudinal section through the nut 40. The permanently integrated balancing ring 10 corresponds to the one shown in the Fig. 1 and Fig. 2. Balancing ring 10 explained. Regarding the details of the balancing ring 10 in this embodiment, reference is made to the explanations relating to the Fig. 1 and Fig. 2 referred.

[0060] Fig. Figure 6 shows a further embodiment of the balancing ring 10 according to the invention, wherein in this embodiment the balancing ring 10 is fixedly integrated into a clamping nut 50. Partial figure A shows an isometric side view of the clamping nut 50, in which an undercut profile 51 for the engagement of an actuating means for the clamping nut can be seen. Partial figure B shows an isometric oblique view from the other side. Fig. Figure C shows a cross-section through the area of ​​the integrated balancing ring 10 and the Fig. Figure D shows a longitudinal section through the clamping nut 50. The permanently integrated balancing ring 10 corresponds to the one shown in the Fig. 1 and Fig. 2. Balancing ring 10 explained. Regarding the details of the balancing ring 10 in this embodiment, reference is made to the explanations relating to the Fig. 1 and Fig. 2 referred.

[0061] Fig. Figure 7 shows a further embodiment of the balancing ring 10 according to the invention, wherein in this embodiment the balancing ring 10 is firmly integrated into a cover element 60 (cover plate). Partial figure A shows an isometric side view of the cover element 60. Partial figure B shows an isometric oblique view from the other side. Fig. Figure C shows a cross-section through the area of ​​the integrated balancing ring 10 and the Fig. Figure D shows a longitudinal section through the cover element 60. The permanently integrated balancing ring 10 corresponds to the one shown in the Fig. 1 and Fig. 2. Balancing ring 10 explained. Regarding the details of the balancing ring 10 in this embodiment, reference is made to the explanations relating to the Fig. 1 and Fig. 2 referred.

[0062] In this embodiment, the cover element 60 is provided with three bores 61, which can be used to fix the cover element 60 with three screws. The fastening with three screws provides a particularly secure anti-rotation device.

[0063] Fig. Figure 8 shows a further embodiment of the balancing ring 10 according to the invention, wherein in this embodiment the balancing ring 10 is designed as a two-part intermediate ring 70 such that it can be assembled from two half-rings 71, 72 and can subsequently be mounted on an axle. Partial figure A shows an isometric side view. Partial figure B shows a cross-section through the two-part intermediate ring 70 in the area of ​​the integrated balancing ring 10. Fig. Figure C shows a longitudinal section through the two-part intermediate ring 70 and Fig. Figure D shows a cross-section through the two-part intermediate ring 70 in the area below the balancing ring 10. The permanently integrated balancing ring 10 corresponds to the one shown in the Fig. 1 and Fig. 2. Balancing ring 10 explained. Regarding the details of the balancing ring 10 in this embodiment, reference is made to the explanations relating to the Fig. 1 and Fig. 2 referred.

[0064] For the assembly and connection of the two half-rings 71 and 72, aligned screw connections 73 are provided in an area below the integrated balancing ring 10.

[0065] The design of such a two-part intermediate ring 70 has the particular advantage that this intermediate ring 70 can be mounted on an axle intended for rotation, even if the axle is not accessible from the ends. For dynamic balancing, for example, two or more of these two-part intermediate rings 70 can also be mounted on the axle.

[0066] Fig. Figure 9 shows a balancing ring 10 with three compensating elements 100 in an embodiment as an intermediate ring. Partial figure A shows an isometric oblique side view. Partial figure B shows a view from the narrow side and Fig. Figure C shows a cross-section. Apart from the number of balancing elements (100), the balancing ring (10) in this embodiment corresponds to the embodiment of the Fig. 1. For further details, please refer to the description at Fig. 1 referred.

[0067] Fig. Figure 10 illustrates various exemplary possibilities (A - F) for the retaining profile of the balancing ring 10 according to the invention. A schematic representation of the balancing ring 10 without the compensating elements is shown in each case as a longitudinal section. Various undercut retaining structures 26 are located in the sides of the channel-shaped recess 14, which has a rectangular cross-section. The compensating elements, not shown here, each have complementary structures provided, such that the compensating elements are held in the channel-shaped recess 14 by these retaining structures, but are simultaneously displaceable in their unfixed state.

[0068] Fig.Figure 11 shows an isometric side view of a mounted grinding mandrel 200 (grinding wheel holder), in the axis of which a balancing ring 10 according to the invention is mounted in the form of an intermediate ring. The grinding mandrel 200 comprises a middle grinding wheel 210 and an upper grinding wheel 211. In the area of ​​the upper grinding wheel 211, a cover plate 250 known from the prior art is arranged as the end of the axis, which is equipped with two balancing stones 251 (compensating elements). These balancing stones 251 are located in an end-face groove of the cover plate 250, which is known per se.

[0069] Below the middle grinding wheel 210, on the axis of the grinding mandrel 200, is the balancing ring 10 according to the invention, whose compensating elements 100 can be operated very well from the side, so that the compensating elements 100 can be moved and fixed in a user-friendly manner. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 2 924 853 A1

[0008] DE 102 06 284 A1

[0009] DE 10 2009 006 520 B4

[0040]

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