EP1782918A1 - Mounting attachment for a grinding tool, grinding tool and support member for a grinding tool - Google Patents

Abstract

Holding fixture (1) has a first tension plate (10) and a second tension plate (20). The first tension plate can rotate relative to the second tension plate about an axis. The first tension plate has a first bearing surface and second tension plate has second bearing surface (21). The first and second bearing surfaces proceed in one another at an angle. A supporting body (31) can be firmly clamped with first and second contact surface (32,33) between the bearing surfaces (11,12) by rotating the first tension plate. Independent claims are also included for following: (1) Grinding tool; and (2) Supporting body (3).

Description

The invention relates to a receptacle for a grinding tool, a grinding tool and a support body for such a grinding tool with the features of the preamble of the independent claims.

Rotary machine grinding tools are known and used today in a variety of different embodiments. Depending on the application, different shapes or types of grinding or polishing tools are used. It is therefore desirable, above all in applications in which frequent replacement of the tool is required, to provide the simplest possible means with which a grinding tool can be connected to and removed from a machine. A grinding tool and a receptacle, for example, in EP 1 050 377 A2 or in EP 1 174 219 A2 shown. These tools and receptacle allow easy connection of the tool to a rotating machine part. The attachment of the grinding tool in the receptacle but requires according to these known solutions tightening a clamping screw.

It is therefore an object of the present invention to avoid the disadvantages of the known, in particular those from EP 1 050 377 A2 and EP 1 174 219 A2 to further develop known grinding tools and recordings. In particular, the handling should be further simplified. At the same time the stability of the connection between recording and grinding tool should be further improved.

According to the invention, these objects are provided with a receptacle for a grinding tool, a grinding tool and a supporting body solved with the features of the characterizing part of the independent claims.

The inventive recording for a grinding tool consists essentially of a first and a second clamping disc. The first clamping disk is arranged rotatable about an axis relative to the second clamping disk. The first clamping disk is zuwendbar a machine to which the receptacle is attached or to be attached. The second clamping disk is zuwendbar the workpiece to be machined. The first clamping disk has a first contact surface for a first contact surface of a supporting body of the grinding tool. The second clamping disk has a second contact surface for a second contact surface of the supporting body of the grinding tool. According to the invention, the first and the second contact surface of the receptacle are at an angle to one another. This can be clamped by rotating the first clamping disk relative to the second clamping disk of the support body between the contact surfaces of the recording. The inclined contact surfaces limit a wedge-shaped gap. By twisting the two discs against each other, the support body is wedged. In this way, various advantages can be achieved. In particular, a clamping effect can be generated by simply rotating the clamping disks against each other. The tightening of screws as in the prior art is not required.

According to a preferred embodiment, the second clamping disk is provided at its periphery with at least one groove. The at least one groove serves to receive a retaining element of the usually annular support body. Through the groove, the holding element of the β supporting body can be brought into a gap, which are defined by the first and the second contact surface of the first and second clamping discs. Such a groove allows a particularly easy insertion of the grinding tool.

According to a further preferred embodiment of the invention, the first clamping disk is also provided with a groove. This groove can be aligned with the groove of the second clamping disk. The groove of the first clamping disk extends to at least the first contact surface of the first clamping disk. As will be described below, such a groove on the first clamping disk allows a particularly simple rotation of the clamping disks against each other as soon as a projection on the support body engages with the groove on the first clamping disk.

For this purpose, the groove of the first clamping disk typically has an engagement surface in the circumferential direction. Upon engagement of the holding element of the supporting body of the grinding tool on this engagement surface, the first clamping disk can be rotated by rotating the supporting body or by rotating the abrasive body connected to the supporting body. Tools for clamping are therefore not mandatory. The rotation takes place counter to the direction of rotation of the machine. The operation of the machine further strengthens the wedging.

According to a further preferred embodiment, a plurality of preferably four grooves are arranged uniformly distributed over the circumference of the receptacle. The number of grooves defines the number of possible protrusions or cams on a support body for attachment. In particular, when using relatively flexible abrasives, which should be adapted to the surface to be machined, it is important that the support body itself can be fixed in a precisely defined position in the receptacle. A plurality of grooves reduces deformation of the support body and therefore leads to better attachment and better grinding results.

Another problem with the example of EP 1 050 377 A2 known devices is their attachment to a machine drive. These known recordings are provided with clamping pins, which on the one hand serve to hold together the two clamping disks and which, on the other hand, are provided for attachment to a machine drive. Due to the axial length of this clamping pin but the grinding tool is relatively far under any existing on the machine protective covers.

For this reason, according to a further aspect of the invention, the receptacle is designed so that one of the clamping disks, in particular the second clamping disk is provided with a threaded bore, by means of which it can be connected to a machine drive. In particular, the second clamping disk can be provided with a pin in which a threaded bore is provided and which extends through the second clamping disk. The first clamping disc may be provided with an opening which is enforceable with the pin. In this way, on the one hand the length of the attachment can be shortened with a machine. At the same time, the two clamping disks can be connected to each other in this way in a particularly simple manner. A screw connection is not required because due to the inclined contact surfaces, the required clamping effect can be achieved by simply rotating the two clamping disks in the circumferential direction without axial feed between the clamping disks. While such a connection of the receptacle in connection with the above-described arrangement of the contact surfaces is particularly preferred, such an attachment of Take advantage of recording with non-wedge-shaped surfaces to attach the support body advantageous.

To insert a support body in the receptacle previously grooves on the first and on the second clamping disc must be aligned axially mutually. In order to simplify this alignment, according to a further preferred embodiment of the invention, means are also provided to limit the rotational movement between the first and the second clamping disc to a predetermined angular range.

According to a further preferred embodiment, one of the clamping disks, typically the second clamping disk, may also be provided with positive locking elements, which can be brought into engagement with a tool. If necessary, with a tool, the recording on a grinding machine by means of a tool can be screwed sufficiently tight.

According to a further preferred embodiment, the receptacle can be provided with means for radially holding at least parts of the support body. In particular, the first clamping disk can be provided with a radially acting retaining surface. This radially acting retaining surface can be brought into contact with the support body, in particular with a cylindrical ring of the support body. In this way, the support body is supported in the radial direction by the retaining surface. Deformation or destruction of the supporting body during operation due to centripetal forces is thereby prevented. Of course, it is also conceivable to provide the second clamping disk with means for radially retaining the supporting body.

The grinding tool according to the invention is particularly suitable for receiving in a receptacle as described above.

Here and below reference is made to a grinding tool. It goes without saying that the invention is equally applicable to any type of rotary machining tools such as polishing tools, grinding tools or the like. The shape and type of the grinding or polishing material is not of particular importance in the context of the present invention.

The inventive grinding tool has a support body and an abrasive attached to the support body. The support body has a holding element. With the retaining element of the support body can be mounted in a receptacle. The holding element has a first contact surface and a second contact surface. With these contact surfaces of the support body between a first contact surface and a second contact surface of the receptacle is clamped. According to the invention, the first and second contact surfaces are at an angle to each other. In particular, in connection with a recording as described above with an angle to each other extending contact surfaces can be achieved with such a support body, a particularly stable surface connection.

According to a preferred embodiment of the invention, the holding elements of at least one radially inwardly of a lateral surface of the support body inwardly projecting cams, typically formed of a plurality of cams. In this case, the cams in the axial direction are preferably arranged asymmetrically on the support body. The arrangement is such that the grinding tool can be fastened to the receptacle only in a predetermined manner, ie only with a grinding surface directed against the workpiece to be machined. This asymmetric arrangement ensures that a grinding tool can not be attached in the wrong way. While such an arrangement is particularly preferably used in connection with a support body with as described above at an angle to each other standing contact surfaces, such an arrangement is also suitable for other forms of contact surfaces. In the case of tools which can be used on both sides, it is also possible to provide a symmetrical arrangement of the cams which permits mounting in both layers.

The cams advantageously have a dimension in the axial direction which is designed in such a way that, when the grinding tool is correctly positioned, the cams can be brought into engagement with a groove of a first clamping disk facing a machine and if the positioning of the grinding tool is incorrect, the cams on the supporting body are not can be brought into engagement with this groove. With the correct positioning by turning the grinding tool, the intervention allows the first clamping disk to rotate with respect to the second clamping disk. By the second clamping disc is held (in particular by holding the machine drive) can be particularly easily clamped in a recording as described above by rotating the grinding tool, the support body of the grinding tool.

Particularly preferably, the support body is provided with four radially inwardly directed cams. The cams are preferably arranged so that the first contact surface is formed by the top of a ring of the support body. The second contact surface is formed by the underside of the cam, which extends at an angle to the top of the ring. In this way, it is particularly easy to produce a supporting body which can be used with the receptacle described above.

Preferably, moreover, the first and second contact surface on the support member of the support body is formed so that the support body can be brought by rotation in the circumferential direction when holding the recording in a clamping position. In this way, no additional tools such as screws for attaching the tool are required.

While the invention has been explained above with reference to grooves on a receptacle and cam on a support body, it goes without saying that in the sense of a kinematic reversal similarly shaped grooves could be used on a support body of the grinding tool and cam on a corresponding receptacle. By turning cams on the first disc relative to the cams on the second disc, the cams can be wedged in the groove of the support body.

Another aspect of the invention relates to a support body for a grinding tool. The support body has at least one retaining element, by means of which it can be fastened in a receptacle. The holding element has a first and a second contact surface. With these contact surfaces of the support body between a first and a second abutment surface of a receptacle is clamped. According to the invention, the contact surfaces of the holding element extend at an angle to each other.

Figur 1a

eine Darstellung eines Ausschnitts von Nuten und Nocken einer erfindungsgemässen Aufnahme und eines erfindungsgemässen Tragkörpers in einer Einfügestellung,

Figur 1b

eine Darstellung eines Ausschnitts von Nuten und Nocken einer erfindungsgemässen Aufnahme und eines erfindungsgemässen Tragkörpers in einer Klemmstellung,

Figur 2

eine Draufsicht auf ein erfindungsgemässen Schleifwerkzeug,

Figur 3

eine Seitenansicht eines Tragkörpers im Schnitt durch-eine Ebene durch eine Drehachse,

Figur 4a

eine Seitenansicht einer zweiten Spannscheibe,

Figur 4b

eine Draufsicht auf die Spannscheibe aus Figur 4a,

Figur 4c

eine Untenansicht der Spannscheibe gemäss Figur 4a,

Figur 5a

eine Seitenansicht einer ersten Spannscheibe,

Figur 5b

eine Draufsicht auf die Spannscheibe gemäss Figur 5a,

Figur 5c

eine Untenansicht der Spannscheibe gemäss Figur 5a,

Figur 6

eine Seitenansicht eines Tragkörpers und einer Aufnahme zur Aufnahme des Tragkörpers, und

Figur 7a bis 7b

verschiedene Darstellungen einer ersten Spannscheibe eines alternativen Ausführungsbeispiels der Erfindung.

The invention is explained in more detail below in exemplary embodiments and with reference to the drawings. He show:

FIG. 1a

a representation of a section of grooves and cams of an inventive recording and a novel inventive supporting body in a Einlassstellung,

FIG. 1b

a representation of a section of grooves and cams of an inventive recording and a novel supporting body in a clamping position,

FIG. 2

a top view of a grinding tool according to the invention,

FIG. 3

a side view of a support body in section through a plane through a rotation axis,

FIG. 4a

a side view of a second clamping disk,

FIG. 4b

a top view of the clamping disk of Figure 4a,

Figure 4c

a bottom view of the clamping disk according to Figure 4a,

FIG. 5a

a side view of a first clamping disk,

FIG. 5b

a plan view of the clamping disk according to Figure 5a,

FIG. 5c

a bottom view of the clamping disk according to Figure 5a,

FIG. 6

a side view of a support body and a receptacle for receiving the support body, and

FIGS. 7a to 7b

various representations of a first clamping disk of an alternative embodiment of the invention.

FIG. 1a shows an enlarged detail of a detail of a receptacle 1 for receiving a grinding tool. From the grinding tool, a cam 34 with a first contact surface 32 and a second contact surface 33 are shown only schematically in dashed lines. Between the first contact surface 32 and the second contact surface 33, an angle β is formed. The angle β is typically about 10 °.

The receptacle 1 consists essentially of a first tensioning pulley 10 and a second tensioning pulley 20, which are each shown only in sections. The first clamping disk 10 is provided on its circumference (see also FIGS. 5a, 5b and 5c) with a circumferential first contact surface 11. The contact surface 11 is interrupted by a groove 12. The second clamping disk 20 is provided with a second contact surface 21. This is arranged at an angle α relative to the first bearing surface. An intermediate space 2 formed between the first contact surface 11 and the second contact surface 21 for receiving the cam 34 is accessible to the cam 34 by a groove 22 on the circumference of the second clamping disk 20. FIG. 1a shows the cam 34 in an insertion position E. In the insertion position E, the groove 12 is aligned with the groove 22 in the axial direction A, so that the cam 34 can be introduced from below. Of course, the cam 34 is not considered to be isolated but attached to a support body. The construction of the support body is shown below with reference to Figures 2 and 3 in more detail.

In order to clamp the cam 34 between the first and second contact surfaces 11, 21, the first clamping disk 10 is rotated in the circumferential direction U relative to the second clamping disk 20. For this purpose, the cam 34 engages with a peripheral contact surface 38 on an engagement surface 13 on the first clamping disk 10. When the second tension pulley 20 is retained and a grinding tool having the cam 34 is rotated in the circumferential direction U, the first tension plate 10 rotates together with the cam 34 to the clamping position K shown in FIG. 1b. Thus engagement between the peripheral contact surface 38 and the engagement surface 13 is possible, the cam 34 in the axial direction A must be sufficient be long trained. The height h of the cam 34 in the region of the peripheral contact surface 38 must therefore be at least so great that the cam 34 extends into the groove 12 of the first clamping disk when the grinding tool is correctly inserted. If the cam 34 is asymmetrically attached to the support body when viewed in the axial direction (see also FIGS. 2 and 3), engagement with a suitable choice of the height h of the cam 34 can only be used if the grinding tool is positioned correctly. This prevents the grinding tool from being mounted with the grinding surface facing the grinding machine.

In the clamping position K according to FIG. 1 b, the carrier body with its contact surfaces 32, 33 is clamped between the contact surfaces 21, 11 of the second clamping disk 20 and the first clamping disk 10. In this case, a lower surface of the cam 34 is the second contact surface 33. An upper contact surface 32 of the ring (only partially shown) of a support body (see Figures 2 and 3) forms the first contact surface which is in contact with the first contact surface 11 of the first clamping plate 10.

FIG. 2 shows a plan view of a grinding tool 30. The grinding tool 30 consists essentially of a carrier body 31 and of an abrasive material 35 which is shown only schematically and which is fastened to the carrier body 31. The support body 31 consists essentially of a cylindrical ring 3, to which a flange 37 is attached. On the inside of the cylindrical ring 36 four at a distance of 90 ° uniformly over the circumference of the ring 36 arranged radially inwardly projecting cam 34 are provided. The upper side of the ring forms a first contact surface 32, which can be brought into contact with the first contact surface 11 of the first clamping disk 10.

FIG. 3 shows a section through a center axis of the support body 31. It can be seen from FIG. 3 that the second contact surface 33 on the underside of the cam 34 extends at an angle β to the first contact surface 32 formed by the upper edge of the ring 36.

The cam 34 is constructed geometrically simple and has seen in plan view essentially a trapezoidal shape. Two side surfaces extending in the axial direction limit the cam 34 laterally. In the axial direction of the cam 34 is bounded on the one hand by a flush with the top of the ring 36 first abutment surface 32 and on the other hand by an angle β to the top of the ring 36 extending second stop surface 33. The abutment surfaces each extend in a plane, so that by rotation in the circumferential direction of the support body is inserted into the receptacle.

The cam 34 is arranged asymmetrically in the axial direction A relative to the ring 36. The cam 34 is flush with the first contact surface 32 on the upper side in FIG. 3. However, the second contact surface 33 is arranged at a distance from the lower end of the support body 31 in FIG. Due to this arrangement and also due to the inclined arrangement of the second contact surface 33, the positioning of the support body is precisely defined in the inventive recording. An attachment with directed against the grinding machine flange 37 is not possible.

The angle β is selected as a function of a corresponding angle α on the receptacle, so that the desired clamping action can be achieved by turning. Typically, the angle β is about 10 °. But there are also some deviations conceivable.

The receptacle 1 formed from a first clamping disk 10 and a second clamping disk 20 is described in greater detail in FIGS. 4a to 4c, 5a to 5c and 6.

FIG. 4a shows a side view of the second tensioning disk 20. The second tensioning disk 20 is designed essentially as a disk, which is provided on its upper side in one piece with a pin 27. The pin 27 is provided with a bore 28 having a thread 23 which extends downwardly through the clamping disk 20. Along its circumference, the clamping disk 20 with grooves 22 as well as at an angle α to the first contact surface of a first clamping disk (see Figure 5a to 5c) extending second contact surface 21 is provided. As the plan view in Figure 4b shows, four second contact surfaces 21 and four grooves 22 are arranged uniformly distributed over the circumference of the second clamping disk 20.

On the surface of the clamping disk a circular segment-shaped recess 25 is provided, whose function will be explained below. The internal thread 23 serves to connect the receptacle with a shaft of a grinding machine. On the outside of the pin 27, a circumferential recess 26 is also arranged. In the recess 26 can be a clamping ring for connecting the second clamping disk 20 with a first clamping disc (see also Figure 6) arrange.

4c shows a bottom view of the second clamping disk 20. The hole 28 extends as shown in Figure 4c through the entire body of the second clamping disk 20. On the underside of the second clamping disk 20 wells 24 are provided which form interlocking elements for a tool. With a turning key, typically one for angle grinder known key can create an engagement with these recesses 24. As a result, the receptacle 1 can be screwed tightly onto a shaft of a grinding machine with a tool.

FIG. 5 a shows a side view of a first clamping disk 10 which, together with the second clamping disk 20 shown in FIGS. 4 a to 4 c, forms a receptacle 1 for a tool. The first clamping disk 10 is designed substantially as a disk. Along its circumference, a first bearing surface 11 is formed in the manner of a paragraph. About the circumference four grooves 12 are arranged. The first clamping disk 10 is also provided with a central opening 14 which serves to receive the pin 27 of the second clamping disk 20. On the lower side in FIG. 5 a, the clamping disk 10 is also provided with a pin 15. The pin 15 extends at composite recording 1 in the annular recess 25 of the second clamping disk 20. In this way, the possible rotational movement between the first clamping disk 10 and the second clamping disk 20 is limited to a predetermined angular range. In particular, the pin 15 is arranged with respect to the position of the recess 25 such that in an extreme angular position, the grooves 12 of the first clamping disk 10 and groove 22 of the second clamping disk 20 are axially aligned with each other, i. that the receptacle 1 is in the insertion position E. In the other axial extreme position, the receptacle 1 is in the clamping position K shown in FIG. 1b.

FIG. 5b shows a plan view of the first tensioning disk 10 shown in FIG. 5a. As can be seen from FIG. 5, the grooves 12 are arranged uniformly over the circumference of the tensioning disk 10. The grooves 12 are slightly deeper than the radial width of the first contact surface 11 in the radial direction.

FIG. 5 c shows a bottom view of the first tensioning pulley 10.

The receptacle 1 from the first tensioning pulley 10 and the second tensioning pulley 20 is shown in assembled form in FIG. Like reference numerals designate like parts as in the preceding figures. The pin 27 of the second clamping disk 20 is guided through the opening 14 of the first clamping disk 10. The first clamping disk 10 and the second clamping disk 20 are held together axially by a clamping ring 3, which is arranged in the annular recess 26 on the pin 27. As a result, the first clamping disk 10 and the second clamping disk 20 can be rotated relative to one another in the circumferential direction U, so that the clamping disk 10, 20 can be moved back and forth between the insertion position E and the clamping position K (see FIGS. 1a and 1b). A diaphragm spring, not shown, can also cause a bias between the first and the second clamping disc. Instead of a clamping ring 3, a nut may be provided on an external thread of the shaft.

In Figure 6, the support body 31 is also shown schematically in side view. By moving in the axial direction A, the ring 36 can be pushed with its inner circumferential surface over the outer circumferential surface of the second clamping disk 20. The grooves 22 in the second clamping disk and the grooves 12 in the second clamping disk 10 allow the receiving radially inwardly projecting cam 34 on the ring 26. Dimensions of the inner circumferential surface of the ring 36 and the outer circumferential surface of the second clamping disk 20 and the radial dimensions and dimensions in the circumferential direction of the grooves and cams are matched to each other. The support body 31 is fitted in the axial direction A as far as the receptacle 1 until the first contact surface 32 at the first contact surface 11 is present. In this case, a contact between a peripheral contact surface 38 of the cam 34 and the engagement surface 13 of the groove 12 of the first clamping disk 10 is formed simultaneously in the circumferential direction. By rotating the support body 31 in the circumferential direction U while retaining the second clamping disk 20, for example on the pin 27, the first clamping disk 10 is rotated into the clamping position K shown in FIG.

The first and second clamping disks 10, 20 are typically made of a metallic material such as aluminum. The support body (31) is typically a plastic injection molded part.

The dimensions of the receptacle and the support body depend on the particular application. Typically, a receptacle with a diameter of about 50 mm with four cams with a length in the circumferential direction of about 10 mm and a depth in the radial direction of about 3 mm has proven. The first and the second clamping disk 10, 20 preferably consist of 4 to 5 mm thick disks. As a connection to a shaft of a grinding machine, a pin 27 with an outside diameter of 20 mm and with an M14 internal thread is typically used. The support body 31 typically has a ring 36 with a wall thickness of 1 mm. The cams 34 typically have a thickness of 2 in the radial direction and typically 5 mm in the axial direction. The free inner diameter of the ring 36 of the support body 31 is adapted to the outer diameter of the receptacle 1 and is typically 45 to 50 mm.

In Figure 7a, an alternative embodiment of a first clamping plate 40 is shown in cross section. The embodiment according to FIG. 7a is an alternative to the first clamping disk according to FIG FIG. 5a. Like the clamping disk according to FIG. 5 a, the first clamping disk 40 according to FIG. 7 a has a central opening 44, a peripheral circumferential stop surface 41 and four grooves 42 arranged over the periphery of the first disk 40 (see also FIG. 7 c). A bore 45 is similar to Figure 5a for receiving a pin. In contrast to the embodiment according to FIG. 5 a, the first clamping disk 40 according to FIG. 7 a is provided with a circumferential collar 46. A section X with the collar 46 is shown in an enlarged view in Figure 7b. The collar 46 has a bevelled retaining surface 47. The retaining surface 47 defines an approximately conical recording. Due to the retaining surface 47, a ring 36 (shown in phantom) of a support body in the radial direction r is retained. In the radial direction r acting forces on the support body are received by the retaining surface 47. Alternatively, it is also conceivable to use cone-shaped rings instead of a cylindrical ring 36 of a carrier body.

FIG. 7c shows a plan view of the tensioning disk 40 according to FIG. 7a. Spaced 90 ° to each other over the circumference four grooves 42 are arranged, which serve to receive cams of a support disc of a grinding tool in the manner described above. The retaining collar 46 is executed circumferentially in FIG. 7 c, with the exception of the grooves 42. But it is also conceivable to provide only individual circular sections with retaining means.

Claims (18)

Mount (1) for a grinding tool (30),
with a first clamping disc (10) and a second, relative to the first clamping disc (20) rotatably arranged and zuwendenden to the workpiece workpiece clamping disc (2),
wherein the first clamping disk (10) has at least one first contact surface (11) for a first contact surface (32) of a supporting body (31) of the grinding tool (30) and
wherein the second clamping disk (20) has at least one second contact surface (21) for a second contact surface (33) of the supporting body (31),
characterized in that the first and second bearing surface (11, 21) at an angle (α) to each other, so that by rotating the first clamping disc (10) relative to the second clamping disc (20) of the support body (30) between the contact surfaces (11 , 21) can be clamped. A receptacle according to claim 1, characterized in that the second clamping disc (20) has at least one groove (22) for at least one retaining element (34) through which the retaining element (34) into a through the first contact surface (11) and the second contact surface (21) limited intermediate space (2) is feasible. Holder according to one of claims 1 or 2, characterized in that the first clamping disk (10) has a groove (12) which can be aligned with the groove (22) of the second clamping disk (20). which extends in the axial direction to at least the first contact surface (11). A receptacle according to claim 3, characterized in that the groove (12) of the first clamping disc (10) in the circumferential direction (U) has an engagement surface (13), so that upon contact of the holding element (34) with the engagement surface, the first clamping disc (10) Turning of the supporting body (31) relative to the second clamping disc (20) is rotatable. Holder according to one of claims 1 to 4, characterized in that four grooves are distributed uniformly over the circumference of the receptacle (1) on the first clamping disk (10) and / or the second clamping disk (20). A receptacle, in particular according to one of claims 1 to 5, with a first clamping disk (10) and a second clamping disk (20), between which a supporting body (31) of a grinding tool (30) can be fastened, characterized in that the one clamping disk (20 ) is provided with a thread (23) for connection to a shaft of a grinding machine. A receptacle (1) according to claim 6, characterized in that the second tensioning disc (20) is provided with a pin (27) which extends through the first tensioning disc (10), the thread (23) acting as an internal thread on the pin (27 ) is trained. Holder (1) according to one of claims 1 to 7, characterized in that the receptacle (1) with means (15, 25) for limiting the rotation of the first clamping disc (10) relative to the second clamping disc (20) to a predetermined or predetermined angular amount is provided in the circumferential direction. A receptacle (1) according to any one of claims 1 to 8, characterized in that the receptacle (1) is provided with form-fitting elements (24) for a tool for fastening the receptacle to a grinding machine. Holder according to one of claims 1 to 9, characterized in that the first clamping disc (10) is provided in the region of its circumference with radial retaining means (47) which in such a way in contact with the support body (30), in particular with a ring (36). of the supporting body (30) can be brought that the supporting body in the radial direction by the retaining means (47) is retained. Grinding tool (3), in particular for a receptacle (1) according to one of Claims 1 to 10, having a supporting body (31) and an abrasive (35) fastened to the supporting body (31),
wherein the support body (31) has at least one holding element (36, 34) by means of which the support body can be fastened in a receptacle (1),
and wherein the holding element (36, 34) has a first contact surface (32) and a second contact surface (33), with which the support body (31) between a first contact surface (11) of a first clamping disk (10) and a second contact surface (21 ) a second clamping disc (20) of a receptacle (1) can be clamped,
characterized in that the first contact surface (32) and the second contact surface (33) at an angle (β) to each other. Grinding tool, in particular according to claim 11, having a supporting body (31) and an abrasive material (35) fastened to the supporting body (31), wherein the supporting body (31) has at least one retaining element (36, 34) by means of which it is held in a receptacle (1). is fastened, wherein that the holding element as at least one radially from a lateral surface (26) of the supporting body (31) projecting cam (34) is formed
characterized in that the cam (34) in the axial direction (A) seen asymmetrically on the lateral surface (26) of the support body (31) is arranged such that the grinding tool (30) directed only against against the workpiece to be machined grinding surface in the receptacle ( 1) can be fastened. Grinding tool according to claim 12, characterized in that the at least one cam (34) in the axial direction (A) has a dimension which is selected such that, when the grinding tool (30) is correctly positioned in the receptacle (1), the cam (34) with a contact surface (13) of a groove (12) of the first clamping disc (10) is engageable and in that incorrect positioning of the grinding tool (30) of the cam (34) not with the engagement surface (13) of the groove (12) of the first Clamping disc (10) can be brought into engagement. Grinding tool according to one of claims 11 to 13, characterized in that the holding element a plurality, in particular four, uniformly over the circumference of the supporting body (31) arranged, radially inwardly extending cam (34). Grinding tool according to one of claims 11 to 14, characterized in that the holding element (36) of the support body has a shape and size such that the holding element (36) in the radial direction in contact with a contact surface (47) of retaining means (46) Recording (1) can be brought. The abrasive tool of any one of claims 14 or 15, wherein the support body is a ring (36) having a radially outwardly extending flange (37) and the cams (34) are radially inwardly of the inside of the ring (36) extend
characterized in that the first contact surface (32) is formed by the top of the ring (36) and that the second contact surface (33) of the cam (34) is at an angle (β) to the first one formed by the top edge of the ring (36) Contact surface 32 extends. Grinding tool according to one of claims 11 to 16, characterized in that the first contact surface (32) and the second contact surface (33) are formed such that by rotating the support body (31) in the circumferential direction (U) relative to the receptacle (1). the holding element (36, 34) in a clamping position (K) can be brought. Support body for a grinding tool according to one of claims 10 to 17,
wherein the support body has at least one holding element (36, 34) by means of which it can be fastened in a receptacle (1), wherein the holding element (36, 34) has a first contact surface (32) and a second contact surface (33) with which the support body (31) between a first contact surface (11) and a second contact surface (21) of the receptacle (1) can be clamped, characterized in that the first and second contact surface (32, 33) at an angle (β) to each other.

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