BRAKING AND / OR CLAMPING DEVICE WITH PISTON-RESISTANT DISC ELEMENT

Description

[0001] The invention relates to a braking and / or clamping device with an annular housing having at least one pneumatic or hydraulic connection and encompassing an axially oriented rod receptacle, wherein the housing has a bottom part and a cover part and wherein at least one annular pressure chamber is arranged inside the housing.

[0002] Such a braking and / or clamping device is known from WO 2004 / 067 222 A1. The pressure chamber is limited by means of an annular hose. During clamping, a longitudinally slotted, circumferential ring is deformed. DE 16 25 452 A1 further discloses a device according to the preamble of independent claim 1.

[0003] The present invention is based on the problem of developing a fast-acting braking and / or clamping device with a short stroke and high accuracy.

[0004] This problem is solved by the features of the main claim. For this purpose, the pressure chamber is bounded axially by at least one piston having a convex piston top and being movable in the axial direction. The pressure chamber is bounded radially by the outer walls of the housing and by at least one inner ring that surrounds an inner wall of the housing having at least one inner wall section. A disk element is arranged in the housing on the piston top facing away from the pressure chamber and pointing in the axial direction, wherein the piston top rests against, can be attached to, or can be fixed against this disk element. The inner wall section is cantilevered in a cover part or a bottom part of the housing.The disc element rests against the inner wall section, so that with increasing deformation of the disc element, the radial load on the inner wall section directed in the direction of an axially oriented longitudinal axis of the braking and / or clamping device decreases.

[0005] The braking and / or clamping device is used to brake and / or clamp machine parts that move relative to each other. The device engages a rod whose centerline coincides, for example, with the longitudinal axis of the device. In the depressurized state, the pressure chamber has its minimum volume. The disc element(s) retain their original shape. They exert pressure on the inner wall, sections of which are deformed towards the longitudinal axis. When the rod is inserted into the braking and / or clamping device, these inner wall sections are pressed against the rod in this clamped state.

[0006] To release the brake and / or clamping device, the pressure chamber is pressurized with pneumatic or hydraulic pressure. The pressure chamber is enlarged, thereby displacing at least one piston that defines the pressure chamber. With the pressure chamber pressurized, each piston loads at least one disc element, deforming it. This relieves the inner wall. The self-resetting inner wall sections return to their unloaded initial position. The clamping of the rod is released or reduced.

[0007] Further details of the invention will become apparent from the dependent claims and the following description of schematically illustrated embodiments. Figure 1: Brake and / or clamping device; Figure 2: Base part; Figure 3: Cover part; Figure 4: Piston; Figure 5: Inner ring; Figure 6: Disc element; Figure 7: Device made of Figure 1 with the lid section removed; Figure 8: Device according to Figure 1in the clamping state; Figure 9: Device according to Figure 1 in a ventilated state; Figure 10: Brake and / or clamping device with one piston; Figure 11: Variant of a brake and / or clamping device; Figure 12: Base part of the device according to Figure 11 Figure 13: Cover part of the device according to Figure 11 Figure 14: Inner ring of the device according to Figure 11 Figure 15: Disc element of the device according to Figure 11 Figure 16: Isometric sectional view of the Figure 11 Figure 17: Device according to Figure 11 in the ventilated state; Figure 18: Device according to Figure 11 in the clamping state; Figure 19: Another variant of a brake and / or clamping device; Figure 20: Base part of the brake and / or clamping device made of Figure 19 Figure 21: Cover part of the brake and / or clamping device made of Figure 19 Figure 22: Disc element; Figure 23: Device of the Figure 19 in the clamping state; Figure 24: Device of the Figure 19in the ventilated state; Figure 25: Detail of the Figure 24 .

[0008] The Figures 1 - 9 Figure 1 shows a braking and / or clamping device (10). Such devices (10) are used, for example, on machine tools to decelerate or fix machine tables relative to guide rods. The braking and / or clamping device (10) is movable or adjustable in the axial direction (15) along the guide rod. In the radial direction, the braking and / or clamping device (10) completely surrounds the guide rod, which is not shown here. The braking and / or clamping device (10) has two operating states. A first operating state is a released or loosened position (11), see Figure 1. Figure 9 In this released position (11), the brake and / or clamping device (10) is movable in its axial directions (15) relative to the guide rod, e.g. The other operating state is a clamping position (12), cf. Figure 8. In this clamping position (12), the brake and / or clamping device (10) presses radially against the guide rod for braking and / or locking.

[0009] The braking and / or clamping device (10) has, for example, an annular, flat housing (21) with, for example, a central rod receptacle (22). The, for example, circular cross-sectional area of ​​the rod receptacle (22) is oriented perpendicular to the central longitudinal axis (14) of the braking and / or clamping device (10), which is oriented in the axial direction (15). This longitudinal axis (14) coincides with the centerline of the rod receptacle (22). The lateral surface (23) of the housing (21) is, for example, coaxial with the rod receptacle (22).

[0010] In this embodiment, the rod receptacle (22) has a nominal diameter of 50 millimeters. This nominal diameter corresponds to the outer diameter of the guide rod to be received in the rod receptacle (22). When the brake and / or clamping device (10) is released, the diameter of the rod receptacle (22) is, for example, 0.06% larger than the nominal diameter. In the clamping position (12), with the guide rod not inserted, the diameter can be reduced, for example, to 96% of the nominal diameter.

[0011] In the exemplary embodiment, the outer diameter of the brake and / or clamping device (10) is 2.9 times the nominal diameter. The axially oriented length (15) of the brake and / or clamping device (10) is, for example, 34% of the nominal diameter. The length of the brake and / or clamping device (10) is therefore less than 50% of the nominal diameter of the rod holder (22).

[0012] In the exemplary embodiment, the housing (21) has a pneumatic connection (13) on both its top (24) and its bottom (25). One of these connections (13) can be closed by means of a blanking plug. It is also conceivable to provide two connections on the top (24) and / or the bottom (25). Alternatively, one or more connections can be provided on the outer surface (23) of the brake and / or clamping device (10). In the exemplary embodiment, the pneumatic connection (13) is located in the edge region (32) of a cover part (31) of the housing (21). Instead of the at least one pneumatic connection (13), at least one hydraulic connection can also be provided in the housing (21).

[0013] The housing (21) comprises a base part (51) and the lid part (31) joined to it. In the exemplary embodiment, the two parts (31, 51) are screwed together. For this purpose, connecting screws (26) are inserted in both the lid part (31) and the base part (51) and screwed into threads (53; 33) in the respective other part (51; 31). However, the two parts (31, 51) can also be joined together by a material bond, e.g., by means of a welded joint, or by a force-fit and / or form-fit, for example, by means of a screw connection or by means of locking elements. The connecting screws (26) are arranged in the edge region (32) of each.

[0014] In this embodiment, the inner wall (27) of the housing (21), which defines the rod recess (22), is formed by the outer contour of 16 inner wall sections (41, 81). In this embodiment, the inner wall sections (41, 81) are designed as clamping contact plates (41, 81). One half of these clamping contact plates (41, 81) is arranged on the bottom part (51) and projects towards the top part (31). These clamping contact plates (81) are hereinafter referred to as the first clamping contact plates (81). The other half of the contact plates (41, 81) is arranged on the top part (31) and projects towards the bottom part (51). These clamping contact plates (41) are hereinafter referred to as the second clamping contact plates (41). The individual clamping contact plate (41; 81) has a clamping contact zone (43; 83) at its free end (42, 82). This points, for example, radially in the direction of the longitudinal axis (14).

[0015] In the exemplary embodiment, all inner wall sections (41; 81) are identically designed and are arranged along a common, e.g. The partial circles are arranged in the plane of the parting line (28) of the housing (21). In the exemplary embodiment, they are each arranged along an annular line. They have the same geometric dimensions. However, it is also conceivable to form individual inner wall sections (41; 81) or groups of inner wall sections (41; 81) with, for example, a different width oriented in the circumferential direction. For example, the individual inner wall section (41; 81) can be pin-shaped.

[0016] The one in Figure 1 The clamping contact jaws (41; 81) shown are spaced uniformly apart. However, the distance between the individual clamping contact plates (41; 81) can also vary.

[0017] The Figure 2Figure 51 shows the base section (51). The base section (51) has a rigid outer wall (52), a base (71), and the first clamping contact plates (81). The outer wall (52) is penetrated in the axial direction (15) by through holes (54) and threaded holes (53) for the connecting screws (26). Furthermore, centering bolt receptacles (56) and mounting holes (57) are provided in the outer wall (52). A distribution channel (58) and an inlet area (64) are embossed into the outer wall (52). Compressed air, for example, is directed from the pneumatic connection (13) into a pressure chamber (16) of the brake and / or clamping device (10) via this distribution channel (58) and the inlet area (64).

[0018] The outer wall (52) is cylindrical in shape. Its inner surface (59) has a multi-stage structure. Adjacent to the base (71), it has a disc receiving area (61) arranged coaxially to the longitudinal axis (14). A transition area (62) adjoins this. Above the transition area (62), the illustrations show Figures 2 , 8 and 9 An outer piston guide area (63) is formed. The outer piston guide area (63) is cylindrical and coaxial with the longitudinal axis (14). The inlet area (64) adjoins the outer piston guide area (63) at the upper edge of the outer wall (52).

[0019] The base (71) is ring-shaped. It has a central circumferential groove (72), cf. the Figures 8 and 9The width of the circumferential groove (72) corresponds, in the exemplary embodiment, to 82% of the distance between the clamping contact plates (81) and the outer wall (52). The center line of curvature lies, for example, at half of the aforementioned distance. The base (71) can also be curved on one side (73) or be flat. In the case of a one-sided curvature, this can lie outside or inside a cylinder coaxial with the longitudinal axis (14) with respect to the center line of curvature.

[0020] In the exemplary embodiment, the individual first clamping contact plate (81) covers a ring section of 22 degrees. It is connected to the base (71) of the base part (51). The individual clamping contact plate (81) has a clamping arm (84) of, for example, a largely constant cross-sectional area. The outer radius of the clamping arm (84) is, for example, 3% larger than the inner radius. The clamping arm (84) can also have, for example, a rectangular cross-sectional area in certain areas. The individual clamping arm (84) can also be tapered relative to the rest of the clamping contact plate (81). Optionally, the individual clamping contact plate (81) can have a longitudinal groove on its inner side (85) oriented parallel to the longitudinal direction (14).

[0021] The clamping contact zone (83) is formed on the inner side (85) of each clamping contact plate (81) facing the longitudinal axis (14). This zone is raised, for example, by one-tenth of a millimeter towards the longitudinal axis (14). In the exemplary embodiment, the sum of the contact areas of all clamping contact zones (43, 83) of the first contact plates (81) and the second clamping contact plates (41) is greater than 20% of the cross-sectional area of ​​the nominal diameter. In the exemplary embodiment, the sum of all contact areas is 25% of the cross-sectional area of ​​the nominal diameter. The clamping contact zones (43, 83) can have a coating, e.g., a brake or friction lining.

[0022] For example, a insertion groove (86) is embossed on the outer surface of each clamping contact plate (81). This insertion groove (86) extends circumferentially. In the exemplary embodiment, it has a constant depth and a constant length oriented in the axial direction (15). The insertion groove (86) of, for example, a clamping contact plate (81) can have a centering rib oriented, for example, in the longitudinal direction.

[0023] In the Figure 3 A lid part (31) is shown. The lid part (31) is constructed similarly to the base part (51).

[0024] For example, the base part (51) and the cover part (31) have the same external dimensions. In this embodiment, the outer wall (34) of the cover part (31) is designed without a distribution channel (58) and without an inlet area (64). The cover part (31) carries the second clamping contact plates (41) in the area adjacent to the rod recess (22). These second clamping contact plates (41) are connected to the top (35) of the cover part (31). In this illustration, they project outwards in the axial direction (15). When the clamping and / or braking device (10) is mounted, they project towards the base part (51).

[0025] The Figure 4 Figure 1 shows one piston (90; 100). The brake and / or clamping device (10) of this embodiment has two pistons (90; 100) whose respective undersides (91; 101) face each other, see Figure 2. Figures 8 and 9In this embodiment, both pistons (90, 100) are identical. Each piston (90; 100) is an annular piston (90; 100). Its outer diameter is, for example, 2.25 times its inner diameter. The inner diameter is, for example, 9.6% larger than the nominal diameter of the brake and / or clamping device (10). This inner diameter of the annular piston (90; 100) is at least 5% larger than the nominal diameter of the brake and / or clamping device (10). The inner surface (92), which is coaxial with the longitudinal axis (14), has an annular groove (93) for receiving a sealing ring (108), cf. Figure 8 . Another sealing ring groove (94) for receiving an external sealing ring (109) is embossed in the outer surface (95) of the ring piston (90; 100).

[0026] The underside of the piston (91; 101) has a circumferential ring (96). This has, for example, a length of one tenth of a millimeter oriented in the axial direction (15) and a width of 2.5 millimeters oriented in the radial direction.

[0027] The piston top (97) has a circumferential projection (98) formed as a bulge. In the exemplary embodiment, the radius of curvature of the projection (98) is 2.4 times the nominal diameter of the brake and / or clamping device (10). The center line of the curvature lies on the mean diameter of the annular piston (90; 100). In the exemplary embodiment, the apex (99) of the projection (98) is offset from its edges by 2% of the nominal diameter in the longitudinal direction (15). The projection (98) can also be designed as a circumferential rib. It is arranged coaxially with the inner surface (92) of the piston (90; 100).

[0028] In the Figure 5An inner ring (110) is shown. The inner ring (110) of this embodiment has a constant cross-sectional profile. Its cylindrical outer surface (111) and its inner surface (112) are coaxial with the longitudinal axis (14). In this embodiment, the inner diameter of the inner ring (110) is 5% larger than the nominal diameter of the brake and / or clamping device (10). The outer diameter is 9.2% larger than the nominal diameter. The length of the inner ring (110) in the axial direction (15) is, for example, 18% of the nominal diameter. When the brake and / or clamping device (10) is mounted, the inner ring (110) surrounds the inner wall (27). For example, it is floatingly mounted within the housing (21) in the axial directions (15).

[0029] The Figure 6Figure 1 shows a disc element (120; 140). The brake and / or clamping device (10) disclosed in this embodiment has at least two disc elements (120; 140). A first disc element (120) is mounted in the base part (51) between the base (71) and the first annular piston (90). The second disc element (140) is located in the cover part (31) between the second annular piston (100) and the cover (35). Both disc elements (120, 140) are identical. In this embodiment, both disc elements (120, 140) are planar, parallel discs when not installed. The individual disc element (120, 140) can be curved like a disc spring. It is also conceivable to arrange several disc elements (120, 140) one above the other.

[0030] In the exemplary embodiment, the outer diameter of the ring-shaped disc element (120, 140) is 2.44 times the nominal diameter of the brake and / or clamping device (10). The inner diameter of the disc element (120, 140) is, for example, 3.5% larger than the nominal diameter. The thickness of the disc element (120, 140) is, for example, 1.8% of the nominal diameter of the brake and / or clamping device (10). The individual disc element (120, 140) can also be strip-shaped. In this case, it has, for example, two opposing circular segment-shaped circumferential sections and a central opening (122). The individual disc element (120, 140) is made of a metallic material, e.g., steel, spring steel, aluminum, etc.

[0031] The individual disk element (120; 140) has a plurality of disk segments (121). In the exemplary embodiment, the number of disk segments (121) of a disk element (120; 140) is twice the number of the first clamping contact plates (81) or twice the number of the second clamping contact plates (41). The individual disk segments (121) are each separated from one another by a slot (123) adjacent to the central opening (122). The individual slot (123) has, for example, a length of 62.5% of the nominal diameter and a width of 2.4% of the nominal diameter. The individual slot (123) terminates in a relief bore (124).

[0032] Each disk segment (121) has a segment pressure zone (125) adjacent to the central opening (122) and a free area (126) spaced apart from the outer contour of the central opening (122). In the exemplary embodiment, the length of the segment pressure zone (125) in the circumferential direction is less than half the imaginary sector arc length of the disk segment (121) at the central opening (122). This arc length is shorter than half the distance between two adjacent slots (123). The free area (126) is, for example, bounded by a quarter ellipse. The individual disk segments (121) are arranged such that two segment pressure zones (125) and two free areas (126) are located next to each other. Further openings (127) are arranged in the outer region of the disk elements (120; 140).

[0033] In the assembled brake and / or clamping device (10), the first disc element (120) rests with its outer circumferential surface (128) in the disc receiving area (61) of the outer wall (52) of the base part (51). The segment pressure zones (125) are located in the insertion grooves (86) of the second clamping contact plates (41). Two segment pressure zones (125) bear against each clamping contact plate (41). For example, the radial position of the disc element (120) is centered relative to the second clamping contact plates (41), e.g., by means of a centering ridge arranged in an insertion groove (86). The clearance surfaces (126) are located outside the first clamping contact plates (41) so that they do not contact them.

[0034] The second disc element (140) is arranged analogously in the cover part (31). The segment pressure zones (125) of the second disc element (140) are in contact with the first clamping contact plates (81).

[0035] The inner ring (110), the outer walls (34, 52) of the housing (21), and the two pistons (90, 100) define a pressure chamber (16). This pressure chamber (16) is connected to the hydraulic or pneumatic port (13). The two pistons (90, 100) are each sealed by means of the sealing rings (108) on the inner ring (110) and by means of the sealing rings (109) on the outer walls (34, 52).

[0036] In the case of a non-pressurized pressure chamber (16), the braking and / or clamping device (10) takes over the pressure in the Figure 8The clamping position (12) shown is entered. The pistons (90, 100) are positioned close to each other near the parting line (28) between the base part (51) and the cover part (31). For example, the two pistons (90, 100) with their circumferential rings (96) are in contact with each other. The pressure chamber (16) has its minimum volume. The disc elements (120, 140) rest against the projections (98) of the pistons (90, 100) in their initial, e.g., flat position. In this position, the disc elements (120, 140) load the clamping contact plates (41, 81). The clamping contact plates (41, 81) are elastically deformed towards the longitudinal axis (14) by means of the disc elements (120, 140). For example, the clamping arms (84) form a bending zone of the clamping contact plates (41, 81). This bending zone can also be limited to a defined area of ​​the clamping arms (84), for example, to an area of ​​reduced cross-sectional area. It is also conceivable to design the bending zone as a hinge.

[0037] In this clamping position (12), both the first clamping contact plates (81) and the second clamping contact plates (41) project into the rod receptacle (22) by the same amount. A rod gripped by the brake and / or clamping device (10) is thus held securely. The clamping contact zones (43, 83) make contact with the rod over a large area. The position of the brake and / or clamping device (10) relative to the rod can therefore be maintained with high accuracy. The first and second clamping contact plates (41, 81) enable a high clamping force.

[0038] To move the brake and / or clamping device (10) relative to the rod, the brake and / or clamping device (10) is released, cf. Figure 9For this purpose, compressed air is supplied to the pressure chamber (16) via, for example, the pneumatic connection (13). The two pistons (90, 100) are forced apart. The pressure chamber (16) expands. The stroke of each piston (90; 100) in the axial direction (15) is, for example, 2% of the nominal diameter. The first piston (90), displaced towards the base (71), loads the first disc element (120) with its projection (98). The first disc element (120) is held both at the disc receiving area (61) of the outer wall (52) and in the insertion grooves (86) of the clamping contact plates (41). The second disc element (140) is held analogously in the cover part (31) and at the first clamping contact plates (81). The loading of the individual disk element (120, 140) by means of the piston (90, 100) leads to an elastic deformation of the disk element (120, 140).The disc element (120, 140) conforms to the protrusion (98) at least in the region of its apex (99). The segment pressure zones (125) migrate radially outwards. The radial stroke of the segment pressure zones (125) is, for example, 1.6% of the nominal diameter. The clamping contact plates (41, 81) are relieved of stress. As the individual disc element (120; 140) deforms, the load on the respective associated clamping contact plate (41; 81) decreases. Under elastic recovery, they return to their original position. Figures 2 and 3 The initial position shown is as follows. The brake and / or clamping device (10) is released.

[0039] The Figure 9Figure 1 shows the brake and / or clamping device (10) in the released position (11). The pressure chamber (16) has its maximum volume. The pistons (90, 100) also limit the pressure chamber (16) in this released position (11). The first piston (90) is in its lower end position. The first disc element (120) is curved towards the bottom (71). The second piston (100) is in its upper end position. The second disc element (140) is deformed towards the top (35). When the disc element (41; 81) is loaded, the respective inner wall sections (41; 81) are relieved of load. For example, a rod seated in the rod receptacle (22) is freely movable when the brake and / or clamping device (10) is released.

[0040] To re-brake and / or clamp, the pneumatic pressure in the pressure chamber (16) is reduced. For this purpose, the internal pressure of the pressure chamber (16) can be adjusted to the ambient pressure using a release valve. It is also conceivable to reduce the pressure in the pressure chamber (16) using, for example, a suction pump. The respective disc element (120; 140) can be fixed to the associated piston (90; 100). Alternatively, the disc element (120; 140) and the piston (90; 100) can be pressurized from the side facing away from the pressure chamber (16). The two pistons (90, 100) each move towards each other in the axial direction (15).

[0041] The two disc elements (120, 140) are relieved of stress. They deform elastically back to their, for example, flat initial position. In doing so, the disc elements (120, 140) displace the respective clamping contact plates (41, 81) in the direction of the Figure 8The clamping position (12) shown. As the deformation of the individual disc element (120; 140) decreases, the deformation of the associated inner wall sections (41; 81) increases.

[0042] The clamping stroke of the individual clamping contact plate (41; 81) in the area of ​​the clamping contact zone (43; 83) corresponds, for example, to the radial stroke of the segment pressure zones (125). The re-deformation of the disc elements (120, 140) and the elastic deformation of the clamping contact plates (41, 81) occur, for example, simultaneously with the movement of the pistons (90, 100). The braking and / or clamping device (10) thus reacts directly to a pressure change in the pressure chamber (16). In the installed state, with the disc element (120; 140) unloaded, the inner wall sections (41; 81) are pressed against the rod.

[0043] The Figure 10Figure 1 shows a sectional view of a variant of a brake and / or clamping device (10). This brake and / or clamping device (10) has, for example, the same nominal diameter of the rod receptacle (22) and the same external dimensions as the brake and / or clamping device (10) described in the previous embodiment.

[0044] In this embodiment, the bottom part (51) is designed similarly to the one in the Figure 2 The base part (51) is shown. In the illustration of Figure 10, the inner ring (110) is integrally formed with the base part (51). However, in this embodiment, the inner ring (110) can also be mounted to float in the axial direction (15). It can also be screwed to the base part (51). The inner diameter and the outer diameter of this inner ring (110) correspond to the dimensions of the one shown in the Figure 5The inner ring (110) shown. If necessary, the inner ring (110) can be thicker in the area of ​​the base (71) than in the piston guide area (113). For example, the inner ring (110) then forms a stroke stop.

[0045] The clamping contact plates (81) arranged on the base part (51) are designed as described above. Instead of, for example, the eight clamping contact plates (81) of the first embodiment, this braking and / or clamping device (10) can have at least two clamping contact plates (81) arranged on the base part (51).

[0046] The lid part (31) is similar to the one in the Figure 3 The illustrated lid part (31) is formed. However, in the illustration of the Figure 10 no clamping contact plates (41). In this embodiment, rigid tongues can be arranged at the locations of the clamping contact plates (41) on the cover side.

[0047] In the lid part (31), a piston (100) is mounted so as to be displaceable in the axial directions (15). This piston (100) is designed like the one in the Figure 4 The piston (100) shown. The disk element (140) used in this embodiment corresponds, for example, to the one shown in the Figure 6 illustrated disc element (140).

[0048] During assembly, for example, at least one disc element (140) is first inserted into the cover part (31). If necessary, the disc element (140) can be fixed against rotation. The piston (100), equipped with the sealing elements (108, 109), is then inserted into the cover part (31) so that the raised section (98) faces the disc element (140). The base part (51) and the inner ring (110) are then inserted, for example, so that the segment pressure zones (125) are located between the clamping contact plates (81). After the base part (51) is placed on the cover part, it is pivoted, for example, by half a division of the clamping contact plates (81) around the longitudinal axis (14) relative to the disc element (140). The segment pressure zones (125) are now located behind the clamping contact plates (81). The clearance areas (126) are located between the clamping contact plates (81). The base part (51) and the lid part (31) can now be joined together.Another assembly sequence is also conceivable.

[0049] With the piston (100) relieved of pressure, the disc element (140) mounted in the cover part (31) applies radial force to the clamping contact plates (81) arranged in the base part (51) towards the longitudinal axis (14). The piston (100) may rest against a stroke stop. The braking and / or clamping device (10) can delay the relative movement of a rod or fix the rod relative to the braking and / or clamping device (10).

[0050] To release the brake and / or clamping device (10), the piston (100) is moved, e.g., by means of compressed air, towards the disc element (140). The disc element (140) is elastically deformed and relieves the clamping contact plates (81). The self-resetting clamping contact plates (81) return to their unloaded initial position.

[0051] The one in Figure 10The illustrated brake and / or clamping device (10) can also be designed with clamping contact plates (41) arranged in the cover part (31). The piston (90) and the disc element (120) are then mounted in the base part (51).

[0052] In the illustrated embodiments, the inner wall sections (81) on the bottom side are parts of the bottom part (51), and the inner wall sections (41) on the top side are parts of the top part (31). However, it is also conceivable to mount the inner wall sections (41; 81) in, for example, spring-loaded joints on the bottom part (51) and / or on the top part (31). The joint spring, which is released when the disc element (120; 140) or disc elements (120, 140) are loaded by means of the piston(s) (90, 100), then returns the inner wall sections (41, 81) to their unloaded initial position.

[0053] The Figures 11 - 18Figure 1 shows another example of a braking and / or clamping device (10). The nominal diameter of the rod receptacle (22) and the external dimensions correspond, for example, to the braking and / or clamping devices (10) described in connection with the preceding embodiments.

[0054] The housing (21) of the brake and / or clamping device (10) also has a base part (51) and a cover part (31) joined to the base part (51) in this embodiment. Here, the base part (51) comprises the first inner wall sections (81). The first inner wall sections (81) are also designed as clamping contact plates (81) in this embodiment. Openings (75) are arranged in the base (71) in the area of ​​the first clamping contact plates (81). These are located, for example, in the area where the individual clamping contact plate (81) is connected to the base (71). The individual clamping contact plate (81) does not have a insertion groove (86) on its outer surface (87).

[0055] The cover part (31) includes the second inner wall sections (41), which are designed as clamping contact plates (41). The cover part (31) also has openings (36). These are arranged in the area where the second clamping contact plates (41) are connected to the ceiling (35).

[0056] The single piston (90; 100) is similarly designed to the one in the Figure 4 The illustrated piston (90; 100) has an inner diameter that is 25% larger than the nominal diameter in this embodiment.

[0057] The Figure 14Figure 1 shows the inner ring (110) of this embodiment. When the brake and / or clamping device (10) is assembled, the inner ring (110) surrounds the inner wall (27) of the housing (21). The inner ring (110) has a cylindrical shape. Its outer surface (111) forms an inner piston guide area (113). Threaded inserts (115) are arranged on the end faces (114). Optionally, a spacer (116) can be arranged on the end face (114) of the inner ring (110) opposite the threaded insert (115).

[0058] In the Figure 15A disc element (120; 140) is shown. The number of disc segments (121) of the individual disc element (120; 140) corresponds to twice the number of the first clamping contact plates (81) or the second clamping contact plates (41). The disc segments (121) have quarter-circular free surfaces (126). The arc length of the individual segment pressure zone (125) is, for example, 40% of a sector bounded by the disc segment (120; 140). In this embodiment as well, several disc elements (120; 140) can be arranged one above the other.

[0059] The Figure 16 Figure 1 shows an isometric section of the braking and / or clamping device (10). In this illustration, the cover part (31) is partially broken away. In this embodiment as well, the first clamping contact plates (81) and the second clamping contact plates (41) form the inner wall (27) of the housing (21).

[0060] In the assembled brake and / or clamping device (10) of this embodiment, the first piston (90) and the first disc element (120) are located in the base section (51). The segment pressure zones (125) of the first disc element (120) point towards the second clamping contact plates (41). In the position shown, the first piston (90) loads the first disc element (120). The second clamping contact plates (41), which project towards the base section (51), are relieved of load. For example, the segment pressure zones (125) are in contact with the outside of the clamping contact plates (41).

[0061] In the lid section (31), the second piston (100) loads the second disk element (140). The second piston (100) is sealed against both the outer wall (34) and the inner ring (110). The first clamping contact plates (81) are relieved of pressure. In this embodiment as well, the first piston (90) and the second piston (100) define the pressure chamber (16).

[0062] In this embodiment, the inner ring (110) is screwed to both the cover part (31) and the base part (51). For this purpose, socket head cap screws (29) are used as fasteners in the openings (36; 75). The inner ring (110) can also be unfastened. For this, the axial preload of the housing (21) can be designed accordingly. The threaded inserts (115) are located in the areas surrounded by the clearance faces (126).

[0063] In the Figure 17 is a cross-section of the brake and / or clamping device (10) of the Figure 11The unit is shown in the open position (11). The pressure chamber (16) is pressurized. The first piston (90) is in its lower end position. The first disk element (120) is supported on the bottom part (51) externally in the disk receiving area (61) and internally against a disk element support (65). The first disk element (120) is deformed between these two supports (61, 65). The second clamping contact plates (41) are relieved of pressure.

[0064] The second piston (100) is in its upper end position. The deformed second disk element (140) has relieved the first clamping contact plates (81). These clamping contact plates (81) are in their position in the Figure 12 initial situation shown.

[0065] The Figure 18This shows the braking and / or clamping device (10) in the clamping position (12). The pressure chamber (16) is relieved of pressure. Both pistons (90, 100) have moved towards the parting line (28) between the base part (51) and the cover part (31). The disc elements (120, 140) are relieved of pressure and have elastically returned to their, for example, flat initial position. In doing so, they have elastically deformed the inner wall (27). Both all first clamping contact plates (81) and all second clamping contact plates (41) are deformed towards the longitudinal axis (14). To release the clamping again, the pressure chamber (16) can be pressurized again, for example, with pneumatic pressure.

[0066] Optionally, a further pressure chamber can be arranged between the first disc element (120) and the base (71) and / or between the second disc element (140) and the top (35). This chamber then has, for example, a further piston that can be attached to the disc element (120; 140). This further pressure chamber, or these further pressure chambers, can then be pressurized, for example, in the opposite direction to the first pressure chamber (16). This allows the individual disc element (120; 140) to be pressurized, for example, for rapid clamping, by means of negative pressure in the first pressure chamber (16) and positive pressure in the further pressure chambers.

[0067] The Figures 19-25 Figure 1 shows another variant of a braking and / or clamping device (10). This has the same external dimensions as the braking and / or clamping devices (10) shown in the previous embodiments. A pneumatic connection (13), for example, is arranged on the top (24) of the housing (21).

[0068] The housing (21) features the [information] in the Figure 20 depicted bottom part (51) and the one in the Figure 21 The cover part (31) shown is attached. In the assembled brake and / or clamping device (10), the two parts are joined by means of the connecting screws (26). The pneumatic connection (13) leads into a two-part pressure chamber (16). A first pressure chamber area (17) is located in the base part (51) between the base (71) and the first piston (90) when the brake and / or clamping device (10) is assembled, cf. Figures 24 and 25 A second pressure chamber area (18) is located in the cover section (31) between the ceiling (35) and the second piston (100). The two pressure chamber areas (17, 18) are connected to each other by means of a connecting channel (19) arranged in the outer walls (34, 52). In the bottom section (51), the connecting channel (19) opens into a delta-shaped bottom nozzle (76). A geometrically identical cover nozzle (37) is formed in the cover section (31).

[0069] In this embodiment, the inner ring (110) of the brake and / or clamping device (10) is formed in two parts. It has two congruent support rings (117, 118). A first support ring (117) is formed in the base part (51). For example, it is integrally formed on the base (71). However, the first support ring (117) can also be attached to the base part (81). The second support ring (118) is formed or attached in the cover part (31). The inner diameter of each support ring (117; 118) is 14% larger than the nominal diameter of the brake and / or clamping device (10). In this embodiment, the outer diameter of each support ring (117; 118) is 34% larger than the nominal diameter of the brake and / or clamping device (10). The longitudinal length (15) of each support ring (117; 118) is 12.5% ​​of the nominal diameter. The free end of each support ring (117; 118) is chamfered on its outer surface.In the depictions of the . Figures 23 - 25 Centering bolt receptacles (119) penetrate the inner ring (110).

[0070] The inner wall (27) of the braking and / or clamping device (10) has two inner wall sections (41; 81). Both inner wall sections (41, 81) are annular. A first inner wall section (81) is part of the bottom part (51). A second inner wall section (41) is part of the cover part (31). In this embodiment, the axial length (15) of each inner wall section (41; 81) is 16.8% of the nominal diameter. For example, there is a circumferential gap of 0.2 mm in length between the inner wall section (41) on the cover part side and the inner wall section (81) on the bottom part side. This gap is, for example, symmetrical to the parting line (28).

[0071] At its free end (42, 82), each inner wall section (41; 81) has a clamping contact zone (43; 83). This zone is ring-shaped. In the exemplary embodiment, the thickness of each inner wall section (41, 81) in the area of ​​the clamping contact zone (43; 83) is 1.5% of the nominal diameter. The respective clamping arm (44, 84) connects the clamping contact zone (43, 83) to the inner ring (110). In the exemplary embodiment, the transition is arc-shaped. The thickness of the inner wall section (41; 81) in the area of ​​the clamping arm (44, 84) is, for example, 81% of the thickness in the area of ​​the clamping contact zone (43, 83).

[0072] On its outer surface (47, 87), the respective inner wall section (41, 81) has a contact chamfer (48, 88) at its free end (42, 82). This chamfer forms an angle of 10 degrees with the clamping contact zone (43, 83). The contact chamfer (48, 88) transitions into the respective clamping arm (44, 84) with a rounded edge.

[0073] In this embodiment, the cylindrical areas of the outer surface (111) of the inner ring (110) also form guide surfaces for the pistons (90, 100). The two pistons (90; 100) are designed as described in connection with the previous embodiments. On their inner surface (92), they have an annular groove (93) for receiving a sealing ring (108). This sealing ring (108) causes each piston (90; 100) to bear against the outer surface (111) of the inner ring (110). On its outer surface (95), each piston (90, 100) has a sealing ring groove (94) for receiving an outer sealing ring (109). This outer sealing ring (109) guides each piston (90; 100) along the outer wall (34; 52).

[0074] The two pistons (90; 100) are arranged in the housing (21) such that their projections (98) face each other. The underside (91) of the piston (90) on the bottom side points towards the bottom (71). The bottom nozzle (76) is flush with the bottom (71). The underside (101) of the piston (100) on the top side is oriented towards the top (35). The top nozzle (37) is adjacent to the top (35).

[0075] The disk elements (120, 140) are arranged between the two pistons (90, 100). The two disk elements (120, 140) are spaced apart from each other by means of two rings (151, 152). Both rings (151, 152) are made of the same material, for example. The material can be an elastomer, a metallic material, etc. They have the same, for example, circular, cross-sectional area. In this embodiment, the thickness of each ring (151; 152) is three millimeters.

[0076] A first ring (151) is referred to below as the inner ring (151). Its mean diameter is, for example, 8% larger than the nominal diameter of the brake and / or clamping device (10). This ring (151) is located in an annular space (130) which is bounded by the inner wall (27) and the inner ring (110).

[0077] A second ring (152) is hereinafter referred to as the outer ring (152). In the exemplary embodiment, the mean diameter of the outer ring (152) is 2.5 times the nominal diameter. The outer ring (152) is located, for example, in a stepped recess (38, 77) of the outer walls (34, 52).

[0078] The Figure 22Figure 1 shows a disk element (120; 140) of this embodiment. The two disk elements (120; 140) are, for example, identically designed. In this embodiment, they have a thickness of one millimeter. The outer diameter of the individual disk element (120; 140) is, for example, 2.53 times the nominal diameter. The inner diameter of the undeformed disk element (120; 140) is 2.7% larger than the nominal diameter.

[0079] In this embodiment, the individual disc element (120; 140) also has 16 disc segments (121) which are spaced apart from one another by means of radial slots (123). The respective segment pressure zone (125), oriented centrally in the direction of the longitudinal axis (14), is designed without a free area in this embodiment.

[0080] During the assembly of the in the Figures 19-25In the illustrated brake and / or clamping device (10), for example, the first piston (90) is first inserted into the base part (51) and the second piston (100) into the cover part (31), so that the top of each piston (97) is visible. Then, a disc element (120; 140) is inserted into a disc support (39) and into the disc receiving area (61), respectively. Before assembling the two sub-assemblies, the two rings (151, 152) are inserted. Finally, the base part (51) is joined to the cover part (31). The assembly can also be carried out in a different sequence in this embodiment. The mounting of the brake and / or clamping device (10) onto a rod is carried out as described in connection with the other embodiments.

[0081] With the pressure chamber (16) unpressurized, the pistons (90, 100) are in their end positions. For example, the lower piston (90) contacts the base (71) of the bottom part (51) with a circumferential ring (96). The upper piston (100) rests against the top (35) of the lid part (31) with a circumferential ring (96). The two disc elements (120, 140) contact the piston tops (97), for example. They lie parallel to each other in the housing (21). In this case, the disc elements (120, 140) load the inner wall sections (41, 81), which are elastically deformed radially inwards along the longitudinal axis (14). The first disc element (120) presses on the respective first inner wall section (81). The second disc element (140) loads the respective second inner wall section (41). In this closed position, the brake and / or clamping device (10) clamps a rod received in the rod receptacle (22).

[0082] When the pressure chamber (16) is pressurized, the pneumatic pressure, for example, is built up in both the first pressure chamber area (17) and the second pressure chamber area (18). The two pistons (90, 100) are moved towards each other in the longitudinal direction (15) relative to the housing (21). As the pistons (90, 100) move, each of the disk elements (120; 140) conforms to the adjacent piston (90; 100). The rings (151, 152) are subjected to load. As the pistons (90, 100) move, the contact area of ​​the disk elements (120, 140) on the raised section (98) of the respective piston (90, 100) increases. The respective inner wall section (41, 81) is relieved of load. The inner wall (27) elastically deforms back to its original position. In this embodiment as well, the re-deformation can be supported by pressure on the piston top (97) and / or negative pressure on the piston bottom (91; 101).

[0083] The in the Figures 19-25The brake and / or clamping device shown can also be configured with a single piston (90; 100) and a single disc element (120; 140). Alternatively, several pistons (90; 100) can move in the same direction relative to the housing (21). In this case, one or more disc elements (120; 140) can be used per piston (90; 100). The brake and / or clamping device (10) can also have a single deformable inner wall section (41; 81). However, several pistons (90; 100), disc elements (120; 140), and / or inner wall sections (41; 81) can also be used. In this case, for example, each deformable inner wall section (41; 81) is associated with at least one disc element (120; 140) and one piston (90; 100).

[0084] Combinations of the individual embodiments are also conceivable. Reference symbol list:

[0085] 10 Braking and / or clamping device 11 Released position, released position 12 Clamping position 13 Connection, pneumatic connection 14 Longitudinal axis 15 Axial directions, longitudinal directions 16 Pressure chamber 17 First pressure chamber area 18 Second pressure chamber area 19 Connecting channel 21 Housing 22 Rod holder 23 Shell surface of (21) 24 Top, end, cover side 25 Bottom, end, base side 26 Connecting screws 27 Inner wall 28 Separating joint 29 Hex socket screws, fasteners 31 Cover part 32 Edge area 33 Thread 34 Outer wall 35 Ceiling 36 Openings 37 Cover nozzle 38 Step recess 39 Glass support 41Inner wall sections, second clamping contact plates 42Free end of (41) 43Clamping contact zone 44Clamping arm 47Outside 48Cut-off edge 51 Base 52 Outer wall 53 Thread 54 Through hole 56 Centering bolt receptacles 57 Mounting holes 58 Distribution channel 59 Inside 61 Disc mounting area, mounting groove 62 Transition area 63 Outer piston guide area 64 Inlet area 65 Disc element mounting, counter support 71 Floor 72 Circulating channel 73 Inside of (71) 75 Openings 76 Floor nozzle 77 Step recess 81 Inner wall sections, first clamping contact plates 82 Free end of (81) 83 Clamping contact zone 84 Clamping arm 85 Inside of (81) 86 Insertion groove, counter holder 87 Outside 88 Contact chamfer 90 Piston, first piston, ring piston 91 Underside of (90) 92 Inner surface 93 Ring groove 94 Sealing ring groove 95 Shell surface 96 Circumferential ring 97 Piston top 98 Raised section 99 Apex of (98) 100 Piston, second piston, ring piston 101 Bottom of (100) 108 Sealing ring 109 Outer sealing ring 110 Inner ring 111 Outer surface 112 Inner surface 113 Inner piston guide area 114 End faces 115 Threaded inserts 116 Spacers 117 Support ring 118 Support ring 119 Centering pin receptacles 120 Disc element, first disc element 121 Disc segments 122 Central opening 123 Slots 124 Relief bore 125 Segment pressure zone 126 Free area 127 Openings 128 Circumferential area 130 ring space 140 disc element, second disc element 151Ring, inner ring 152Ring, outer ring

Claims

1. Brake and / or clamping device (10) having an annular housing (21), having at least one pneumatic or hydraulic connection (13) and engaging around a rod holder (22) oriented in an axial direction (15), wherein the housing (21) has a bottom part (51) and a cover part (31) and wherein at least one annular pressure chamber (16) is arranged within the housing (21), characterised in that - the pressure chamber (16) is delimited in the axial direction (15) by means of at least one piston (90; 100) which can be displaced in the axial direction (15) and has a curved piston top (97), - the pressure chamber (16) is delimited in a radial direction by means of the outer walls (34, 52) of the housing (21) and by means of at least one inner ring (110), which engages around an inner wall (27) of the housing (21) having at least one inner wall section (41; 81), - a disc element (120; 140) is arranged in the housing (21) on the piston top (97) facing away from the pressure chamber (16) and pointing in an axial direction (15), wherein the piston top (97) rests against, can rest against or is fixed to this disc element (120; 140), - the inner wall section (41, 81) is arranged projecting in a cover part (31) or in a bottom part (51) of the housing (21) and - the disc element (120; 140) rests against the inner wall section (41; 81) such that with increasing deformation of the disc element (120; 140), the load on the inner wall section (41, 81) directed radially in the direction of a longitudinal axis (14) of the brake and / or clamping device (10) oriented in an axial direction (15) decreases.

2. Brake and / or clamping device (10) according to Claim 1, characterised in that the piston (90; 100) is sealed at the outer wall (34, 52) and at the inner ring (110).

3. Brake and / or clamping device (10) according to Claim 1, characterised in that at least two opposing pistons (90, 100) and at least two disc elements (120; 140) are arranged in the housing (21), wherein each piston (90; 100) rests against, can rest against or is fixed to respectively one disc element (120; 140).

4. Brake and / or clamping device (10) according to Claim 1, characterised in that the inner ring (110) consists of two congruent support rings (117, 118), wherein a first support ring (117) is formed or attached in the cover part (31) and a second support ring (118) is formed or attached in the bottom part (51).

5. Brake and / or clamping device (10) according to Claim 1, characterised in that the inner wall sections (41; 81) are arranged along a ring-shaped line.

6. Brake and / or clamping device (10) according to Claim 1, characterised in that two rings (151, 152) are arranged between the disc elements (120; 140), wherein a first ring (151) is positioned in an annular space (130) between the inner ring (110) and the inner wall (27) and wherein a second ring (152) rests against the outer wall (34, 52).

7. Brake and / or clamping device (10) according to Claim 1, characterised in that the individual disc element (120; 140), in the unloaded state, is a flat disc with radially oriented slots (123) adjacent to a central through-hole (122), wherein the width of the individual slot (123) is larger than the thickness of the disc element (120; 140).

8. Brake and / or clamping device (10) according to Claim 1, characterised in that the individual piston (90; 100) has on its piston top (97) an elevation (98) arranged coaxially with the inner surface (92) and facing the disc element (120; 140).

9. Brake and / or clamping device (10) according to Claim 1, characterised in that each inner wall section (41; 81) has at least one clamping contact zone (43; 83) on its inside (85).

10. Brake and / or clamping device (10) according to Claim 1, characterised in that the inner ring (110) has an inner piston guiding region (113) on its outer surface (111).