Clamping and / or braking device suitable for vacuum

Abstract

The present disclosure relates to an annular elastic element for a clamping and / or braking device, the element comprising: an annular spring plate having a first annular side surface and a second annular side surface; a sealing element, where the sealing element is arranged on the second side surface of the spring plate, and where the sealing element forms an inner projection in the region of the inner edge of the annular spring plate and forms an outer projection in the region of the outer edge of the annular spring plate; wherein the inner projection and / or the outer projection of the sealing element each project at least in sections. The present disclosure also relates to a housing part for a pneumatic clamping and / or braking device, and to a pneumatic clamping and / or braking device having such an annular elastic element.

Description

Technical Field

[0001] The present disclosure relates to an annular elastic element and a housing portion for a pneumatic clamping and / or braking device, and a pneumatic clamping and / or braking device having the annular elastic element. Background Art

[0002] In the production of tools or machine parts, machining machines (especially work spindles or other machine tools) are used, which process the material of a workpiece by means of a tool fixed on an axis, in particular in order to give it a desired shape. The axis can be the axis of rotation or the pivot axis of such a machine. In addition, rotatable or pivotable work tables are used to place the tool or workpiece in a suitable machining position via the axis, or to move the workpiece at a corresponding speed. In addition, high speeds of the axis are a prerequisite for precise and efficient machining. Therefore, emergency or safety systems are responsible for stopping the rotation of the axis or holding the axis in a certain position in the event of a malfunction or failure of the system (for example, power failure or cable breakage), or for fixing the axis.

[0003] Common processing machines have electromagnetic, hydraulic or pneumatic clamping and / or braking devices. Such devices have friction linings that can be frictionally connected to the shaft by force transmission. As a result, the shaft can be fixed at different speeds.

[0004] In a hydraulic clamping device, a chamber is filled with hydraulic oil and a rotating shaft or disc is clamped. Passive hydraulic clamps are also well known. However, such hydraulic clamps have a long reaction time or a short reaction time that requires high costs. In addition, the hydraulic materials (especially hydraulic valves and hydraulic pipes) are very expensive and require longer assembly times. Hydraulic oil also requires additional expenses to be recorded for maintaining the environmental cleanliness of the hydraulic clamp.

[0005] In pneumatic clamping and / or braking devices, the elastic element (especially the elastic plate) is usually filled with compressed air, which can overcome some of the above-mentioned disadvantages of the hydraulic clamping device.

[0006] EP1585616B1 and EP1651881B1 describe pneumatic clamping devices with two annular spring plates, which are introduced into the housing of the clamping device and form a pressure space there, which can be filled with compressed air or air inlet and outlet to change the degree of bending of the spring plates and thus switch between a closed state of the clamping device (in which the object to be clamped is clamped like a rotatable shaft) and an open state of the clamping device (in which the object is free). However, in practice, it has been shown that such clamps cannot be operated in a vacuum and in a clean room without disturbing the clamp and the environment. Summary of the invention

[0007] Starting from the technical situation mentioned at the outset, the present disclosure is based on the object of providing a component which enables a pneumatic clamping and / or braking device to be operated reliably in a vacuum or in a clean room.

[0008] This object is achieved by an annular elastic element having the features of claim 1, a housing part having the features of claim 33 and a clamping and / or braking device having the features of claim 46. Preferred embodiments are described in the dependent claims, the description and the drawings.

[0009] According to the solution of the present invention, an annular elastic element for a clamping and / or braking device is provided, which element includes: an annular spring plate, wherein the annular spring plate has a first annular side surface and a second annular side surface; a sealing element (also referred to herein as a "second sealing element" because it is arranged on the second side surface of the spring plate), wherein the sealing element is arranged on the second side surface of the spring plate, and wherein the sealing element forms an inner protrusion in the area of ​​the inner edge of the annular spring plate and an outer protrusion in the area of ​​the outer edge of the annular spring plate, the inner protrusion and / or the outer protrusion of the sealing element respectively forming protrusions at least in sections.

[0010] The term "annular" in the present disclosure is not necessarily to be understood as a circular ring. The term also covers other annular embodiments, such as angular annular embodiments.

[0011] According to the term "protrusion", the inner and outer protrusions rise or protrude from one or more surfaces of the (second) sealing element. Preferably, the (second) sealing element is integrally formed and / or in one piece with the inner and / or outer protrusions.

[0012] According to the solution of the present invention, there is also provided a housing part for a clamping and / or braking device, the housing part comprising:

[0013] An annular groove for clamping the elastic element according to the invention, wherein the groove forms a first annular edge and a second annular edge of the annular opening of the housing part, wherein the annular groove defines an inner surface of the housing part between the first annular edge and the second annular edge, wherein the inner surface forms a first chamfer in the region of the first annular edge and the inner surface forms a second chamfer in the region of the second annular edge, wherein the chamfers are oriented such that the annular opening increases towards the first and second edges. The effect of the projections and the chamfers is that the elastic element according to the invention and the housing part according to the invention form an interrelated product, since each projection can come into contact with one of the chamfers.

[0014] According to the solution of the present invention, a clamping and / or braking device is also provided for clamping and / or braking an object to be clamped and / or braked, the device comprising: a first elastic element according to the present invention and a second elastic element according to the present invention; a shell, which comprises a first shell part (preferably according to the present invention) and a second shell part (preferably according to the present invention), the first shell part having an inner surface, the second shell part having an inner surface, wherein the shell parts are arranged relative to each other and fixed to each other, so that the inner surfaces of the shell parts jointly define an internal space within the shell; one or more clamping elements, each of which has a clamping surface; a spring, which is arranged in the internal space, comprising a first elastic element and a second elastic element, wherein the elastic element is arranged in the internal space, so that a first pressure space is formed in the internal space between the elastic element and the inner surface of the shell part, wherein the first pressure space can vent air and can withstand A positive pressure of a pressure medium can be supplied to the shell, wherein a first elastic element is clamped in the internal space with its first side surface facing the inner surface of the first shell part, and wherein a second elastic element is clamped in the internal space with its first side surface facing the inner surface of the second shell part; wherein the spring is designed so that when the first pressure space is air-intaken or air-outlet or the first pressure space is subjected to positive pressure, the bending of at least one of the spring plates of the elastic element can be changed, thereby switching the device between an open state (wherein the object to be clamped is separated from one or more clamping surfaces) and a closed state (wherein at least one of the one or more clamping surfaces transmits a clamping force and / or a braking force to the object), wherein the protrusion of the inner protrusion or the outer protrusion of at least one of the elastic elements is designed to contact a first part of the inner surface of one of the shell parts, thereby at least inhibiting the fluid connection between the transition part between the first pressure space and the shell part.

[0015] The problem of the easy interference of clamping and / or braking devices in vacuum or clean rooms (clamps falling off and / or the ambient atmosphere being affected by the clamps) has long been unsolved, and various aspects of the present invention can solve this problem. The following developments of the inventors have made contributions, targeting each individual case and its enhanced combination.

[0016] For example, the inner projection and / or the outer projection of the (second) sealing element can each be formed at least in sections as a preferably radially extending projection (or projection or outwardly directed curvature) so that a particularly good seal is achieved at the transition of the housing parts for use in a vacuum or clean room. The projection can be formed relative to the rest of the projection by applying additional (elastic) material to the sealing element. These projections can fill an inner space in the housing part, for example in the gap region at the transition of the housing part, and can form a sealing contact with the inner wall of the housing part (for example a bevel or a long chamfer). Preferably, the projection of the outer projection of the second sealing element extends radially outwards, preferably radially outwards beyond the outer edge of the spring plate. Preferably, the projection of the inner projection of the second sealing element extends radially inwards, preferably radially inwards beyond the inner edge of the spring plate.

[0017] The projection is particularly advantageous for sealing the gap of the first pressure chamber at the transition to the adjacent housing parts. The projection has the effect that, when the first pressure chamber is in operation, hardly any medium or no medium flows in or out through the housing edge.

[0018] As an alternative or supplement to the protrusion, the inner protrusion and / or the outer protrusion of the second sealing element preferably have a flat surface at least in sections, which can be used in particular as a bearing surface for sealing, for example relative to the housing wall or another elastic element. Therefore, the clamp or its second pressure space is sealed more and more tightly to inhibit or prevent the pressure medium from escaping from the second pressure space to the environment. When the pressure medium is applied to the second pressure space, the flat surface increases the penetration resistance to the pressure medium (especially gas). The flat surface reduces or prevents the medium from overflowing between the first pressure space and the second pressure space. Preferably, the protrusion is adjacent to or abuts the flat surface, respectively. Preferably, the flat surface is respectively incorporated into the protrusion.

[0019] The flat surface also supports the displacement of the protrusion relative to the inner wall of the housing part, thereby producing the above-mentioned effect of the protrusion. As stated, this supporting effect is particularly evident when the flat surface is adjacent to or abuts the relevant protrusion and / or is incorporated into the relevant protrusion. Therefore, the flat surface and the respective relevant protrusion form an interactive feature combination, but can also exist separately.

[0020] For use in vacuum or clean rooms, the elastic material used for the elastic element may be a suitable material, preferably one that releases little or no material into the vacuum (high dielectric resistance), is suitable for high temperatures and / or has low gas permeability.

[0021] In order to make a further contribution to achieve a particularly good seal in a vacuum environment or a clean room, the elastic element according to the invention can have a first connection seal for a first port (which is used to apply a pressure medium to a first pressure chamber), wherein the first connection seal seals the first port. Preferably, the edge of the first connection seal can at least partially and preferably completely surround the first port opening and can be in the form of an O-ring.

[0022] In order to make a further contribution to achieve a particularly good seal in a vacuum environment or a clean room, the elastic element according to the present invention can have a second connection seal for a second port (which is used to apply a pressure medium to a second pressure chamber), wherein the second connection seal seals the second port. Preferably, the edge of the second connection seal can at least partially and preferably completely surround the second port opening and can be in the form of an O-ring. Particularly preferably, the edge can form a port protrusion of the second connection seal, which forms an undercut at least in sections at the edge of the second port opening. By the undercut of the port protrusion of the elastic element, an undercut can be formed on the housing part. The undercut of the second connection seal increases the sealing relative to the outside and reduces the risk of the second connection seal detaching from the plane housing surface, particularly when applying the first pressure space. In addition, the use of a sealant (adhesive) here can be avoided by the undercut. Such a sealant may have a negative impact on the vacuum or clean room.

[0023] In order to make a further contribution to achieving a particularly good seal in a vacuum environment or a clean room, the housing part of the housing part according to the invention or the device according to the invention can have a (preferably circular) notch or recess for accommodating an O-ring. The notch or recess with the O-ring supports the above-mentioned function of the projection and the first connection seal so that no fluid flows in or out through the housing edge during operation in the first pressure space. In addition, a sealant (adhesive) between the housing halves is not required in a vacuum and a clean room and can be omitted.

[0024] In order to enable the clamp to be used in a humid environment in addition to being used in a vacuum or clean room, the inventors have developed a series of components which will be described below and which can also be used in each case alone or in combination with the components described above.

[0025] During the operation of the device, under the influence of the liquid medium, in particular in the area of ​​the clamping surface, the liquid medium may penetrate into the housing of the device. Due to this possibility, during operation, the medium may penetrate into the first pressure space, resulting in accumulation in the first pressure space. The penetration of the liquid medium may lead to failure of the components due to leakage (e.g., rubber damage), dirtying of the device, and worse reaction time of the device. The inventors have recognized that the penetration of the liquid medium is mainly due to the presence of small gaps at the transition of the housing part of the device (in particular, the two clamping elements or clamping surfaces of the housing part). During the opening process, for example, the second pressure space expands (e.g., by filling it with compressed air). At the same time, the first pressure space is vented. The movement of the elastic element (e.g., a rubber spring plate) discharges air from the first pressure space, thereby generating suction in the first pressure space. Due to the penetration of the liquid medium into the first pressure space, a permanent small leak is usually generated, especially relative to the second pressure space, which leads to a continuous flow of the liquid medium as long as the second pressure space expands. Due to the existence of this effect, the suction effect is further aggravated, resulting in accelerated failure or premature malfunction of the device.

[0026] In this context, the inventors have realized that installing a sealing element with a protrusion on the side of the elastic element facing the first pressure space can interrupt or suppress this suction effect, so that the above-mentioned failure or malfunction of the device no longer occurs. In particular, the fluid connection between the first pressure chamber and the transition part of the shell part or the clamping element can be suppressed by these components without thereby impairing the opening and closing functions of the device or its dynamic performance. In the elastic element according to the present invention, the second sealing element is arranged on the second side surface of the annular spring plate, and the second sealing element has an inner protrusion in the region of the inner edge of the annular spring plate of the elastic element, and an outer protrusion in the region of the outer edge of the annular spring plate. The two protrusions on the inner and outer edges of the spring plate are usually used to lean against the inner wall of the opposite second elastic element or the shell so that a second pressure space is formed there. Therefore, each of the two protrusions can preferably have a bearing surface. According to the above findings of the inventors, the elastic element according to the present invention has a (first) sealing element, which is on the other (first) side surface of the spring plate so that it can face the first pressure space, and the sealing element forms a first protrusion, so that the first protrusion is suitable for protruding into the first pressure space and at least suppressing the fluid connection between the first pressure space and the transition part of the shell part there.

[0027] The first projection is preferably formed between the inner edge and the outer edge of the annular spring plate, wherein the first projection is particularly preferably formed in the region of the inner edge or the outer edge of the annular spring plate so as to approach the above-mentioned gap between the clamping elements, depending on whether the clamping action is directed inwardly or outwardly. The first projection is preferably mounted on a first side surface of the annular spring plate so that it is suitable for mounting in the region of the transition of the housing part or the clamping element and so as to project into the first pressure space.

[0028] Thus, the first protrusion rises or protrudes from the surface of the first sealing element.Preferably, the first sealing element is integrally formed and / or formed in one piece with the first protrusion.

[0029] According to a preferred aspect of the elastic element, the first sealing element also has a second protrusion - preferably on the first side surface, preferably in the area of ​​an edge of the annular spring plate, which edge is opposite to the edge where the first protrusion is arranged, which second protrusion serves to further interrupt or suppress the fluid connection between the first pressure space and the transition part of the housing part or the clamping element.

[0030] According to a preferred aspect of the elastic element, the first and / or the second sealing element is vulcanized on the spring plate and is thus particularly firmly fixed to the spring plate.

[0031] Preferably, the first and / or second protrusions each have a rounded surface at least in sections, so that contact is produced in a recess of any shape of the housing, thereby achieving the above-mentioned inhibition or interruption of the fluid connection.

[0032] According to a preferred aspect of the housing part or the device, the housing part has an indentation or depression in the inner surface of the housing part, wherein the indentation or depression is preferably complementary to the surface shape of the first or second protrusion in contact therewith, so that the above-mentioned contact is particularly effective (sealing).

[0033] The inventors have realized that the first protrusion and the second (optional) protrusion of the first sealing element are also respectively suitable for inhibiting or even preventing leakage of the pressure medium (especially gas) that can be applied to the first pressure space. Therefore, in addition to using the clamp in a vacuum or clean room, it also becomes more feasible to use the clamp in a humid environment.

[0034] For use in a humid environment, vacuum or clean room, the housing part may be made of a suitable material (preferably steel), which is preferably not prone to corrosion to prevent rust from falling into the vacuum or clean room.

[0035] By means of the components described herein individually and in combination, a clamp can be provided which can be reliably operated in a vacuum and / or clean room and which can optionally be operated in a humid environment without thereby negatively affecting the opening and closing dynamics of the clamp.

[0036] If the present invention describes features that are not listed in the claims, these features do not represent essential features that must be included in the claims, but are particularly prominent preferred implementations of the subject matter of the claims, which can be combined with each claim or with any other claim. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1A A schematic cross section of an inwardly directed passive pneumatic clamping and / or braking device according to the invention is shown in the closed state.

[0038] Figure 1B A schematic cross section of an outwardly directed passive pneumatic clamping and / or braking device according to the invention is shown in the closed state.

[0039] Figure 2A A schematic cross section of an inwardly directed passive pneumatic clamping and / or braking device according to the invention is shown in the open state.

[0040] Figure 2B A schematic cross section of an outwardly directed passive pneumatic clamping and / or braking device according to the invention is shown in the open state.

[0041] Figure 3A A schematic cross section of an inwardly directed active pneumatic clamping and / or braking device according to the invention is shown in the open state.

[0042] Figure 3B A schematic cross section of an outwardly directed active pneumatic clamping and / or braking device according to the invention is shown in the open state.

[0043] Figure 4A A schematic cross section of an inwardly directed active pneumatic clamping and / or braking device according to the invention is shown in the closed state.

[0044] Figure 4B A schematic cross section of an outwardly directed active pneumatic clamping and / or braking device according to the invention is shown in the closed state.

[0045] Figure 5A A cross section through the inventive pneumatic clamping and / or braking device is shown in three dimensions.

[0046] Figures 5B to 5D Shows Figure 5A A variation of the housing section shown.

[0047] Figures 6A to 6C An embodiment of a spring element according to the invention is shown.

[0048] Figure 7A variant of a housing part according to the invention is shown in cross section.

[0049] Figure 8 A section of the device according to the invention is shown perpendicular to the clamping plane.

[0050] Fig. 9 A top view of a spring element according to the invention is shown.

[0051] Fig.10 A variant of a housing part according to the invention or a housing part of a device according to the invention is shown in a top view.

[0052] Fig.11 A detail of a section in the region of the second connection seal is shown, the section being perpendicular to the clamping plane in an embodiment of the device according to the invention, corresponding in position to Fig. 9 , 10 The section line XI indicated in FIG. 1 passes through the elastic element and the housing part.

[0053] Fig.12 A detail of a section in the region of the first connection seal is shown, the section being perpendicular to the clamping plane in an embodiment of the device according to the invention, corresponding in position to Fig. 9 , 10 The section line XII indicated in FIG. 1 passes through the elastic element and the housing part.

[0054] Components shown in several drawings have the same reference numerals. DETAILED DESCRIPTION

[0055] The present disclosure relates to an annular elastic element and a housing portion for a pneumatic clamping and / or braking device, and a pneumatic clamping and / or braking device having such an annular elastic element.

[0056] When the text refers to a device "clamp" or "clamping device", "clamping force" or "clamping" process, the same also includes the device "brake" or "brake device" or "braking force" or "braking" process.

[0057] Figures 1A to 5A , Figure 8 A schematic cross section of such a clamping device 10 according to the invention is shown, which comprises a housing 3 (which comprises two housing parts 3a, 3b) and also a spring 1 arranged in the housing 3 (which comprises at least two annular elastic elements 1a, 1b according to the invention).

[0058] The clamping device 10 according to the present invention comprises the following: a first elastic element 1a according to the present invention, a second elastic element 1b according to the present invention; a housing 3, which comprises a first housing portion 3a having an inner surface, and a second housing portion 3b having an inner surface, wherein the housing portions 3a, 3b are arranged relative to each other and fixed to each other, so that the inner surfaces of the housing portions 3a, 3b jointly define an inner space 13 in the housing 3; one or more clamping elements 8, wherein each clamping element 8 has a clamping surface 7; a spring 1, which is arranged in the inner space 13 and comprises a first elastic element 1a and a second elastic element 1b, wherein the elastic elements 1a, 1b are arranged in the inner space 13, so that a first pressure is formed in the inner space 13 between the elastic elements 1a, 1b and the inner surfaces of the housing portions 3a, 3b. Space 4, wherein the first pressure space 4 can vent air and can withstand the positive pressure of the pressure medium that can be supplied to the shell 3, wherein the first elastic element 1a is clamped in the internal space 13, and its first side surface faces the inner surface of the first shell part 3a, and wherein the second elastic element 1b is clamped in the internal space 13, and its first side surface faces the inner surface of the second shell part 3b; wherein the spring 1 is designed so that when the first pressure space 4 is vented or vented or the first pressure space 4 is subjected to positive pressure, the degree of bending of at least one of the spring plates of the elastic elements 1a, 1b can be changed, so that the device 10 can be switched between an open state (wherein the object 5 is separated from one or more clamping surfaces 7) and a closed state (wherein at least one of the one or more clamping surfaces 7 transmits a clamping force and / or a braking force to the object 5). The device 10 according to the present invention also includes the components mentioned at the beginning, which allow the device to operate reliably in a vacuum and / or a clean room. These components are shown in Figures 6 to 7. Fig.12 A detailed explanation is given in .

[0059] Figure 1A , 1B 4A and 4B respectively show such a clamping device 10 in a closed state, wherein the clamping surface 7 of the clamping element 8 contacts the circumference of the object 5. The clamping element 8 is also called a clamping lip. The clamping element 8 can be integrally formed with other parts of the housing parts 3a and 3b, or it can be a component of the housing parts 3a and 3b, which is structurally separated from other parts.

[0060] The clamping force or clamping effect of the clamping surface 7 on the object 5 to be clamped occurs in a clamping plane which extends via two vectors, each of which forms a radius of the annular elastic element 1a, 1b or the annular groove 11 (see Figure 5A). Axis 9 may pass through the center point of the ring of the assembly (here described as annular) and may therefore be referred to as the main axis of the clamping device 10, which may be perpendicular to the clamping plane. When "inner" and "outer" projections, edges or ends are referred to herein, the inner edge, projection or end is closer to axis 9 than the corresponding outer edge, projection or end. The same applies to other assemblies.

[0061] The clamping device 10 may be configured to be rotationally symmetrical about the main axis 9. The main axis 9 may approximately or exactly pass through the opening ( Figure 5B The center of the opening 14). Figure 1A , 4A In the embodiment, the object 5 to be clamped (e.g. the axis of rotation of a machine or a workbench) is placed in the opening 14, so that the clamping force of the clamping device is directed radially inwards in the clamping plane towards the main axis 9 (perpendicular to the main axis 9). Figure 1B , 4B In the embodiment, the object 5 to be clamped is placed outside the clamping device 10, so that the clamping force of the clamping device is directed radially outwards away from the main axis 9 (perpendicular to the main axis 9) in the clamping plane.

[0062] exist Figure 1A , 2A , 3A and 4A, the clamping element 8 is located between the spring 1 and the opening 14 or the main axis 9. On the other hand, in Figure 1B , 2B , 3B and 4B, the object 5 to be clamped at least partially surrounds the clamping device 10, so that the clamping element 8 is located there between the object 5 and the opening 14 or the main axis 9. Figure 1B , 2B , 3B and 4B, a component (which at least partially fills the opening 14 and through which the main axis 9 extends) can be introduced into the opening 14 instead of the object 5 to be clamped.

[0063] exist Figures 1A to 5A In each case, the spring 1 is clamped between two contact surfaces ( Figure 5C and 5D 101 and 102) and extends between the two contact surfaces. Figures 1A to 2BIn the pressure-free initial state of the device 10, the spring 1 can be slightly bent so that it is firmly fixed in the housing 3 in this state. The same applies to any other state of the device 10. The degree of bending of the spring 1 depends on the state of the device 10. If the device 10 is in a state in which the spring 1 is bent (for example, bent more strongly than in the pressure-free initial state, such as in the open state), the exhaust of the internal pressure space 2 of the spring 1 and the intake of the external pressure space 4 will cause the spring 1 to at least partially relax, and the spring 1 is pressed against the radial contact surface, the spacing of the radial contact surfaces will be slightly increased, so that the housing 3 is elastically deformed in the area of ​​the clamping element 8 or the clamping surface 7, so that the clamping surface 7 contacts the object 5 and presses against the object 5 with a (predetermined) clamping force to firmly clamp the object 5. The object 5 is firmly clamped and the clamping device 10 is in the closed state, as shown in FIG. Figure 1A , 1B In the closed state of the device 10 , the spring 1 can still be slightly bent even after partial relaxation, so that it is firmly fixed in the housing 3 in this state.

[0064] Here, the clamping element 8 can be an elastic element, for example a spring fork, which in the unstressed initial state of the device 10 is moved by the elastic force of the (slightly) bent spring 1 from an initial position (in which the elastic element is relaxed) to a tensioned position (for example by bending the spring fork 8) until the restoring force of the elastic element 8 in the unstressed initial state reaches equilibrium with the elastic force of the spring 1. By reaching equilibrium, the clamping surface 7 can press the object 5.

[0065] By additionally injecting compressed air (eg 4 bar or 6 bar) into the external pressure space 4 in the closed state, the clamping force can be optionally increased by a predetermined value. Figure 1A , 1B Indicated by the optional additional compressed air pump (boost pump) 6 and the shaded area (compressed air) in the external pressure space 4. The external pressure space 4 can be connected to an air connection I (also called "closed") via an opening in the housing 3, which can be connected to the compressed air pump 6.

[0066] In this case, for example, the drive device 10 is used to switch between a braking movement of the controlled object 5 (pressure-free state) and a complete clamping of the object (situation in which sufficient pressure is applied).

[0067] Even though two pressure spaces 2 , 4 are shown and described here by way of example, the clamping device 10 can also operate with a single pressure space, which can be, for example, the inner pressure space 2 or the outer pressure space 4 .

[0068] Figure 2A , 2B Shows Figure 1A , 1BThe clamping devices 10 in the housing 3 are each in an open state, wherein the clamping surface 7 does not contact the circumference of the object 5 or is separated from the circumference of the object 5. The internal pressure space 2 can be connected to an air connection II (also called "open") via an opening in the housing 3, which can be connected to a compressed air pump 6.

[0069] Compressed air (e.g. 4 bar or 6 bar) is filled into the internal pressure space 2 through the compressed air pump 6, and the external pressure space 4 is exhausted. Figure 1A , 1B Compared to the closed state in FIG. 1 , the spring 1 is bent or stretched more strongly (more convexly), the spring 1 is radially shortened or the distance between the two contact surfaces is radially shortened. The clamping surface 7 is lifted off the object 5 to release the clamping. The object 5 can move freely (for example, rotate about the axis 9 or move linearly along the axis 9), and the clamping device 10 opens.

[0070] The device 10 can be switched back and forth between a closed state and an open state.

[0071] Compared with hydraulic clamps, the pneumatic clamp 10 has a series of advantages.

[0072] By using a combination of an elastic component (in this case, a spring 1 with elastic elements 1a, 1b) and compressed air, for example, very short reaction times can be achieved when switching between an open and closed state, and an object 5 can also be firmly clamped. The spring 1 can preferably be configured in the form of a plate, as shown in more detail in FIG5, wherein two elastic elements 1a, 1b are placed against each other to form the spring 1, and the internal pressure space 2 of the spring 1 is located between the plates 1a, 1b. The plates 1a, 1b can also be annular, as shown in FIG5, and can optionally additionally have radial grooves so that the inner diameter can be changed with particularly low forces. The elastic elements 1a, 1b can be coated with rubber at least in the area of ​​the grooves to achieve the required seal of the compressed air. The elastic elements 1a, 1b are generally configured to be pressure-resistant and elastically bendable and are arranged in the housing 3 of the clamping device 10 so that an internal pressure space 2 is formed within the spring 1 and between the elastic elements 1a, 1b, and an external pressure space 4 is formed between each elastic element 1a, 1b and the housing 3 or housing parts 3a, 3b of the clamping device 10. FIG. 5 shows a schematic diagram of the embodiment of the present invention. Figure 1A , 2A A similar three-dimensional view of a clamping device 10 .

[0073] like Figure 1AAs shown, the air is introduced or filled into the external pressure space 4 and the air is discharged through the internal pressure space 2, the spring 1 is at least partially relaxed and exerts a clamping force on the object 5 to be clamped, especially on the circumference of the shaft 5. In the event of energy or pressure failure, the object 5 is thus clamped, or the shaft 5 stops moving immediately, thereby achieving safe clamping. Depending on the size, this pneumatic clamp 10 can reach a holding torque of several hundred Nm (or even several thousand Nm), such as Figure 1A As shown, the holding torque can be further increased by additionally injecting compressed air into the external pressure space 4 by means of a pressure pump 6 (boosting pump). In this case, compressed air of a few bar (e.g. 4 bar or 6 bar) is sufficient to provide several times the holding torque achieved without a boosting pump. In this case, in fact, when switching between the open and closed states of the clamp 10, a slight transverse bending of the plates 1a, 1b (perpendicular to their longitudinal axis) generates a large elastic force that can be used to clamp or release the prestressed clamping device 10. As a result, reliable clamping and release of the rapidly rotating machine shaft 5 is also possible.

[0074] In the case of pneumatic materials, the cost and assembly expenses are also lower than hydraulic materials, and the use of compressed air does not incur additional system cleaning expenses. The overall size of such pneumatic clamps can also be small, because the lateral bending of the spring is small and the longitudinal dimension (change) is small, so the volume of the small pressure space is sufficient to apply the required clamping force.

[0075] As far as pneumatic clamps are concerned, they are generally divided into passive clamping devices 10 (such as Figures 1A to 2B As shown) and active clamping device 10 (as Figures 3A to 4B shown).

[0076] In the unpressurized initial state, the spring 1 can be bent to different (lateral) degrees and can therefore be shortened radially to different degrees. The inner side of the housing 3 can adapt to the bending of the elastic elements 1a, 1b or limit the latter. A corresponding stop surface of the elastic elements 1a, 1b can be formed, for example, by the inner wall of the housing. The inner wall of the housing can be formed with a shape (e.g. concave) that is complementary to the (e.g. convex) bending of the elastic elements 1a, 1b.

[0077] In the case of a passive clamping device 10, in the unpressurized initial state, the spring 1 is usually slightly elastically bent or prestressed (e.g. convex), and the clamping device 10 can be closed ( Figure 1A , 1B ). Only by filling the internal pressure space 2 with compressed air ( Figure 2A , 2B), the clamping device 10 is opened by the force from the inside. In most cases, the spring 1 will be slightly bent in the initial state without pressure, as a result, when clamping or pressure drops, the elastic force generated by the energy stored in the spring 1 will be transmitted to the object 5 to be clamped as a clamping force to clamp the object 5.

[0078] As for the active clamping device 10, in the initial state without pressure ( Figure 3A , 3B ), the spring 1 bends laterally outwards more strongly than in the case of a passive clamping device, in particular more convexly, with the result that the distance between the two radial contact surfaces is shortened and the clamping device 10 opens. No clamping force is exerted on the object 5 by the clamping surface 7. The object is free because the clamping surface 7 does not contact the object 5 or is spaced apart from it.

[0079] By means of the plastic deformation of the elastic elements 1a, 1b, the spring 1 can bend more strongly laterally outwards in the same housing 3 in the unpressurized initial state and can therefore be shortened more radially than in the case of a passive clamping device. The radial dimensions of the elastic elements 1a, 1b in the unpressurized initial state are smaller, which results in the clamping device 10 being in an open state in the unpressurized initial state. Even in the case of plastic deformation, the elastic elements 1a, 1b bend elastically and press the contact surfaces, thereby fixing the spring in the housing. The interior space of the housing or the recess can accommodate the greater bending caused by the plastic deformation in the initial state.

[0080] The clamping force must now be actively applied from the outside, e.g. Figure 4A , 4B As shown, the clamp is switched to the closed state. At this time, compressed air is introduced into the external pressure space 4 through the compressed air pump 6, so that the spring 1 is filled with compressed air from the outside, so that the spring 1 is actively relaxed, the bending of the spring 1 is reduced, the distance between the two contact surfaces is increased, and the housing 3 is elastically deformed in the area of ​​the clamping element 8 or the clamping surface 7, so that the clamping surface 7 contacts the object 5 and generates a clamping force on the object 5, thereby firmly clamping the object 5. The active clamping device 10 is then in the closed state.

[0081] Depending on the area of ​​application and the prescribed safety regulations, active or passive clamping systems 10 are used. If safe clamping is primarily required, passive clamping devices are usually used. With such pneumatic passive clamping systems, a predetermined clamping force can be generated in a pressure-free state when the device is installed accordingly in the overall device, with which the object 5 to be clamped is loaded. By applying positive or negative pressure, the force transmitted to the object can be increased, reduced or completely eliminated, thus opening up a wide range of application areas. On the other hand, if the clamping device is mainly used for purposeful work operations, such as changing tools, active clamping devices are usually used.

[0082] like Figure 5A As shown, the housing 3 of the clamping device 10 according to the present invention comprises two housing parts 3a, 3b, which are fixed to each other by fastening members (e.g. screws) and are installed so that in the installed state the two housing parts 3a, 3b define an inner space 13 between the housing parts 3a, 3b in the housing 3, wherein the spring 1 according to the present invention and its annular elastic elements 1a, 1b are arranged therein. The housing parts 3a, 3b respectively define a groove 11, which is also annular and is used to accommodate the annular elastic elements 1a, 1b, as shown in FIG. Figures 5A to 5D At least a portion of the first contact surface 101 of the housing portion may be (substantially) perpendicular to the radial direction R of the annular groove 11 , and / or a portion of the second contact surface 102 of the housing portion may be (substantially) perpendicular to the radial direction R of the annular groove 11 .

[0083] The object 5 to be clamped (eg a shaft) can be introduced into the opening 14 ( Figure 5B ), the opening 14 extends through the center of the housing 3. The housing can extend up to 360° around the opening and at least partially surround the object 5 in at least one plane, which is called the clamping plane. The central main axis 9 of the clamping device passes centrally through the opening 14 and is perpendicular to the clamping plane. Figure 1A , 2A , 3A, 4A and 5A, the main axis 9 passes through the shaft centrally along the longitudinal axis of the shaft.

[0084] One or more of the clamping surfaces 7 are along the circumference of the housing 3 or the opening 14, and when the housing 3 is elastically deformed in the region of the clamping element 8 or the clamping surface 7, a clamping force is generated on the outer circumference of the object 5, thereby clamping the object 5. In order to effectively open and close the clamping device 10 relative to the object 5 to be clamped, while avoiding damage to the object 5, a symmetrical distribution of the clamping force along the clamping surface 7 or along the circumference of the object 5 is desirable. An asymmetrical distribution of the clamping force may lead to damage to the object 5. Preferably, one or both contact surfaces 101, 102 are configured to be circular in the clamping plane. Preferably, the clamping surface 7 is configured to be circular in the clamping plane. The clamping element 8 can be configured in an annular shape. In each individual case or in combination thereof, the center point of all annular or circular components described herein can be the center point of the intersection between the main axis 9 and the clamping plane (e.g. the center point of the opening 14).

[0085] Figure 5B The housing part (here Figure 5AAn embodiment of the upper housing part 3a in the embodiment, wherein the housing part 3a has an annular groove 11 for clamping the annular elastic element 1a, and wherein the housing part 3a has an inner surface defined by the groove 11 (see Figure 7 105 in). The annular groove 11 preferably defines an annular opening 12 in the housing part, wherein the annular opening is formed between a first annular edge 12a of the housing part and a second annular edge 12b of the housing part. The elastic element 1a can be clamped between the first annular edge 12a and the second annular edge 12b.

[0086] When the elastic element 1a is introduced into the groove 11 through the opening 12, its first side surface (see Figure 6C When the first pressure chamber 4 is formed between the inner surface and the elastic element 1a, the first pressure chamber 4 is formed when the first pressure chamber 4 is directed toward the inner surface and is clamped in the groove 11. In this case, the elastic element according to the invention has the components mentioned at the beginning, which allow the assembly to be used reliably in a vacuum and / or clean room. These components are shown in FIGS. Fig.12 A detailed explanation is given in .

[0087] like Figure 5C , 5D As shown, the elastic element 1a of the spring 1 shown extends from a first contact surface 101 in the housing part 3a to a second contact surface 102 in the housing part 3a and can contact the latter. In this case, from the center point of the opening 14, the first contact surface 101 is arranged radially more outside than the second contact surface 102.

[0088] Figure 5C Shows Figure 5B 3 a , in which the upper plate 1 a of the spring 1 meets the first contact surface 101 and preferably comes into contact with the latter. Figure 5D Shows Figure 5B , wherein the upper plate 1a of the spring 1 meets the second contact surface 102 and preferably contacts the latter. However, in each case, there may also be one or more other components, through whose elastic element 1a an elastic force is exerted on the contact surfaces 101, 102, so that it is radially located between one or more of the contact surfaces 101, 102 and the elastic element 1a.

[0089] like Figure 5B , 5DAs shown, the elastic element 1a is clamped in a groove 11 between the inner sides of the housing parts 3a. Each plate of the spring 1 is introduced into the groove 11 of the respective associated housing part through the opening 12 in the direction of the main axis 9 of the clamping device 10 when it is mounted along the inner surface of the housing part 3a, until the respective plate abuts against a stop 112, 122 at the end of each of the two contact surfaces 101, 102 and is thus unable to enter the groove 11 further. Since the extent of the elastic element 1a in the clamping plane or in the radial direction of the annular groove can be greater than the extent of the inner space defined by the housing parts, the plate 1a can be bent or prestressed in the unstressed initial state.

[0090] exist Figures 6A to 6C In the accompanying drawings, embodiments of the components of the elastic element for vacuum and / or clean rooms according to the present invention, as well as optional components for humid environments are described in more detail.

[0091] Fig. 6A An annular elastic element 1a, 1b for a clamp and / or brake device 10 according to the invention is shown, which element 1a, 1b comprises: an annular spring plate 16, wherein the annular spring plate 16 has a first annular side surface 16c and a second annular side surface 16d; an optional (first) sealing element 17, wherein the (first) sealing element 17 is preferably arranged on the first side surface 16c of the spring plate 16; a (second) sealing element 15, wherein the (second) sealing element 15 is arranged on the second side surface 16d of the spring plate 16, and wherein the (second) sealing element 15 forms an inner protrusion 15a in the region of the inner edge 16a of the annular spring plate 16 and an outer protrusion 15b in the region of the outer edge 16b of the annular spring plate 16, wherein the inner protrusion 15a and / or the outer protrusion 15b of the (second) sealing element 15 at least sectionally form protrusions 15c and 15d, respectively. Preferably, the optional (first) sealing element 17 forms the first protrusion 17a.

[0092] Figure 6B , 6C It is shown that the first protrusion 17a is formed between the inner edge 16a and the outer edge 16b of the annular spring plate 16; here, only as an example, the first protrusion 17a is formed in the region of the inner edge 16a or the outer edge 16b of the annular spring plate 16.

[0093] Fig. 6A , 6B It is further shown that the first sealing element 17 (preferably located in the region of the outer edge 16b of the annular spring plate 16) forms an optional second projection 17b on the first side surface 16c.

[0094] Each protrusion 15a, 15b, 17a, 17b of the first and / or second sealing elements 15, 17 may be annular at least in sections and extend annularly around the axis 9. Each protrusion 15a, 15b, 17a, 17b of the first and / or second sealing elements 15, 17 may be fixed (preferably vulcanized) on the spring plate 16, or may be detachably arranged on the spring plate 16, preferably in the form of an O-ring.

[0095] Fig. 6A , 6C It is also shown that the longitudinal axis of the first projection 17 a of the first sealing element 17 is (substantially) perpendicular to the first side surface 16 c of the spring plate 16 .

[0096] like Figure 6B , 6C As shown, the inner protrusion 15a and / or the outer protrusion 15b of the second sealing element 15 respectively have flat surfaces 15e, 15f at least in sections, which serve as bearing surfaces relative to the (inner) housing wall or another elastic element, for example, to define and seal the second pressure space 2. These figures also show that the inner protrusion 15a and / or the outer protrusion 15b of the second sealing element 15 respectively form radially extending protrusions 15c, 15d at least in sections.

[0097] Preferably, if Figure 6B As shown, the protrusion 15d of the outer protrusion 15b of the second sealing element 15 extends radially outward, preferably radially outward beyond the outer edge 16a of the spring plate 16. Preferably, the protrusion 15d is adjacent to or abuts the flat surface 15f. Preferably, the flat surface 15f merges into the protrusion 15d.

[0098] Preferably, if Figure 6C As shown, the protrusion 15c of the inner protrusion 15a of the second sealing element 15 extends radially inwardly, preferably radially inwardly beyond the inner edge 16a of the spring plate 16. Preferably, the protrusion 15d is adjacent to or abuts the flat surface 15e. Preferably, the flat surface 15e merges into the protrusion 15c.

[0099] The first sealing element 17 and / or the second sealing element 15 can be made of elastic material alone or simultaneously, preferably rubber or other suitable materials, which are fixed (for example, vulcanized) on the spring plate 16 .

[0100] Figure 7 A housing part 3a, 3b according to the invention is shown. The housing part has an advantageous and preferred adaptation to the elastic element 1a, 1b according to the invention.

[0101] The shell parts 3a, 3b include an annular groove 11 for clamping the annular elastic elements 1a, 1b, wherein the groove 11 forms a first annular edge 12a and a second annular edge 12b of an annular opening 12 of the shell parts 3a, 3b, wherein the annular groove 11 defines an inner surface 105 of the shell parts 3a, 3b between the first annular edge 12a and the second annular edge 12b, wherein the inner surface 105 forms a first bevel 103 (or a long chamfer) in the region of the first annular edge 12a, and the inner surface 105 forms a second bevel 104 (or a long chamfer) in the region of the second annular edge 12b, wherein the orientation of the bevels 103, 104 causes the annular opening 12 to increase toward the first edge 12a and the second edge 12b.

[0102] The inner surface 105 can form a first abutment surface 101 and a second abutment surface 102, which are formed to clamp the spring plate 16 of the elastic element 1a, 1b according to the present invention therebetween, wherein the first inclined surface 103 is arranged between the first abutment surface 101 and the first annular edge 12a, and the second inclined surface 104 is arranged between the second abutment surface 102 and the second annular edge 12a. When the elastic element 1a, 1b is clamped in the groove 11 and the first side surface 16c faces the inner surface 105, the protrusions 15c, 15d and the inclined surfaces 103, 104 preferably form a sealing contact.

[0103] like Figure 7 As shown, the first abutment surface 101 may form a first bevel 103 (or a long chamfer) or be incorporated into the bevel, and / or the second abutment surface 102 may form a second bevel 104 (or a long chamfer) or be incorporated into the bevel, wherein the orientation of each of the bevels 103, 104 is preferably such that the annular opening 12 or the groove 11 increases toward the first edge 12a and the second edge 12b (see Figure 7 and Figure 5B ). Through each inclined surface 103, 104, the force of bending the clamping element 8 is largely avoided to be transmitted from the second sealing element 15 to the clamping element 8, and the force of clamping or braking the object 5 is mainly transmitted to the clamping element 8 and the clamping surface 7 by the spring plate 16 or the inner edge 16a. This is maintained by the second sealing element 15, which makes the opening and closing process of the device more reliable.

[0104] The projections 15c, 15d are provided to fill the space at the bevels 103, 104 and to contact the bevels 103, 104. The projections 15c, 15d are advantageous in order to seal the first pressure space 4 against the gap at the transition of the clamping elements 8 of the adjacent housing parts 3a, 3b. The projections at the housing edge with the bevels 103, 104 are advantageous in that during operation of the first pressure space 4, there is hardly any or no medium flowing in or out through the housing edge.

[0105] When a pressure medium is applied to the second pressure space 2, the flat surfaces 15e, 15f first increase the resistance to the permeability of the pressure medium (especially gas). The flat surfaces 15e, 15f reduce or prevent the medium from overflowing between the first pressure space 4 and the second pressure space 2. The flat surfaces 15f, 15e also support the displacement of the protrusions 15c, 15d relative to the inclined surfaces 103, 104 on the housing, thereby achieving the above-mentioned effect of the protrusions. Figure 6B , 6C As described, this support is particularly evident when the flat surface 15e or 15f is adjacent to and / or incorporated into the associated protrusion 15c or 15d. The flat surface and the respective associated protrusion thus form a combination of features that work in synergy with each other, but can also exist separately. With regard to vacuum operation, each sealing element 17a, 17b is considered an additional barrier and supports sealing the first pressure space 4 relative to the environment.

[0106] The housing parts 3a, 3b may have a (preferably circular) notch or recess 110 for accommodating an O-ring. The notch or recess 110 may preferably completely surround the housing parts 3a, 3b along the circumference of the housing parts and be located in the region of the first annular edge 12a or between the outer edge 100b of the housing parts and the first abutment surface 101 or the notch 11. Alternatively or additionally, the notch or recess 110 may preferably completely surround the housing parts 3a, 3b along the circumference of the housing parts and be located in the region of the second annular edge 12a or between the inner edge 100a of the housing parts and the second abutment surface 102 or the notch 11.

[0107] Now in order to ensure an additional preferred seal for use in a humid environment, a first sealing element is provided. When the elastic element 1a, 1b is clamped in the groove 11 and the first side surface 16c is facing the inner surface 105, the first projection 17a of the first sealing element 17 will preferably be in sealing contact with a first portion of the inner surface 105 of the housing part 3a, 3b. The first portion may have an indentation or depression 106 of the housing part 3a, 3b. Preferably, the surface shapes of the first projection 17a and the first portion 106 are at least partially complementary to produce a particularly effective sealing contact. When the elastic element 1a, 1b is clamped in the groove 11 and the first side surface 16c is facing the inner surface 105, the second projection 17b of the first sealing element 17 will preferably be in sealing contact with another portion of the inner surface 105 of the housing part 3a, 3b. The other portion may have an indentation or depression 107 of the housing part 3a, 3b. Preferably, the surface shapes of the second projection 17b, part 107 are at least partially complementary to produce a particularly effective sealing contact. A fluid connection between the first pressure space 4 and the housing environment, in particular in the region of the transition between two adjacent housing parts 3a, 3b, is inhibited or completely prevented by each of the two projections 17a, 17b.

[0108] Preferably, the housing portion is made of a material that is not susceptible to corrosion.

[0109] Figure 8 An inventive clamping and / or braking device 10 is shown. Figure 8 In, for example, a device 10 is shown having an inwardly directed clamping action, as Figure 1A , 2A and 5A.

[0110] exist Figure 8 In the embodiment of the present invention, the first protrusion 17a of the first sealing element 17 of at least one elastic element 1a, 1b preferably forms a sealing contact with a first part (e.g. 106) of the inner surface 105 of one of the housing parts 3a, 3b, thereby at least inhibiting a fluid connection between the region of the first pressure space 4 and the transition between the housing parts 3a, 3b. The contact can be at least partially sealed against a medium (preferably a fluid or liquid) to prevent the medium from penetrating into the housing 3 from the outside of the device 10 through a gap at the transition between the housing parts 3a, 3b or at the clamping element 8.

[0111] Figure 8 In the embodiment, the area of ​​the first pressure space 4 is arranged between the first protrusion 17a of the first sealing element 17 of at least one elastic element 1a, 1b and the outer edge 16b of the spring plate 16 of at least one elastic element 1a, 1b, or between the second protrusion 17b of the first sealing element 17 of at least one elastic element.

[0112] The optional second projection 17b of the first sealing element 17 of at least one elastic element 1a, 1b comes into contact with a second portion (e.g. 107) of the inner surface 105 of the housing part 3a, 3b, wherein the second portion of the inner surface 105 is preferably located between the first abutment surface 101 and the second abutment surface 102 of the housing part 3a, 3b. The projection can also reduce the fluid connection between the first pressure space 4 and the outer area of ​​the clamping element 8. The inner surface 105 can have one or more indentations or recesses 106, 107, wherein the shape of the indentations or recesses 106, 107 is preferably complementary to the surface of the projection 17a, 17b in contact therewith.

[0113] From the combination of Figures 6, 7 and 8, it can be seen that the first abutment surface 101 of each shell part 3a, 3b forms a first inclined surface 103, and the second abutment surface 102 of each shell part 3a, 3b forms a second inclined surface 104, wherein the protrusion 15c of the inner protrusion 15a of the second sealing element 15 of the first elastic element contacts the second inclined surface 104 of the second abutment surface 102 of the shell parts 3a, 3b, and wherein the protrusion 15d of the outer protrusion 15b of the second sealing element 15 of the first elastic element contacts the first inclined surface 103 of the first abutment surface 101 of the shell parts 3a, 3b.

[0114] exist Figure 8 In the embodiment, the first elastic element 1a and the second elastic element 1b are clamped in the internal space 13 so that the flat surfaces 15e of the inner protrusion 15a of the second sealing element 15 of the elastic elements 1a and 1b contact each other, and / or the flat surfaces 15f of the outer protrusion 15b of the second sealing element of the elastic elements 1a and 1b contact each other, thereby defining the second pressure chamber 2 and sealing it, especially when the pressure medium is filled therein.

[0115] Fig. 9 An embodiment of a spring element 1 a , 1 b according to the invention is shown with a first connection seal 30 and / or a second connection seal 20 .

[0116] The annular spring plate 16 may be arranged between a section of the second connection seal 20 and a section of the first connection seal 30. The first connection seal 30 and the second connection seal 20 may be arranged at opposite sections of the inner edge 16a or the outer edge 16b of the annular spring plate 16.

[0117] The first connection seal 30 and / or the second connection seal 20 may each be made of an elastic material, preferably rubber.

[0118] The first connection seal 30 can be biased radially inwardly or outwardly at least in sections against the inner edge 16a and / or the outer edge 16b of the spring plate 16 of the elastic element 1a, 1b (see Fig. 9 ). The first connection seal 30 may be a part of the first sealing element 17 and / or the second sealing element 15. The first connection seal 30 may radially protrude from the inner edge 16a or the outer edge 16b (see Fig. 9 ).

[0119] The second connection seal 20 can be biased radially inwardly or outwardly at least in sections against the inner edge 16a and / or the outer edge 16b of the spring plate 16 of the elastic element 1a, 1b (see Fig. 9 ). The second connection seal 20 may be a part of the first sealing element 17 and / or the second sealing element 15. The second connection seal 20 may radially protrude from the inner edge 16a or the outer edge 16b (see Fig. 9 ).

[0120] Fig.11 , 12 A cross-sectional detail of a device 10 according to the invention is shown in each case. Fig.11 , 12 The left and right halves show the Fig. 9 The cross-section of the elastic element 1a, 1b according to the invention, which is installed in accordance with Fig.10 Here, the elastic element 1a, 1b is clamped in the groove 11 between the inner edge 100a (or the clamping element 8 with the clamping surface 7) and the outer edge 100b of the housing part 3a, 3b, so that the first connection seal 30 is in contact with the area of ​​the housing part 3a, 3b for the first port I and the second connection seal 20 is in contact with the area of ​​the housing part 3a, 3b for the port II. This process is repeated twice, thereby producing two components according to the invention, which are then fixed to each other, such as Fig.11 and 12 shown.

[0121] Fig.11 The cross-sectional detail of the device 10 shown in FIG. 1 corresponds in position to Fig. 9 , 10 The section line XI indicated in FIG. 1 passes through the elastic elements 1a, 1b and the housing parts 3a, 3b in the region of the second connection seal 20. The second connection seal 20 has an edge along the second port opening, wherein the edge is used to seal the second port II of the clamping and / or braking device 10 to apply pressure medium to the second pressure chamber 2 of the clamping and / or braking device 10. The second connection seal 20 forms a port protrusion 21 along the edge of the second port opening, which at least partially and preferably completely surrounds the second port opening.

[0122] The port protrusion 21 of the second connection seal 20 forms an undercut 22 at least in sections at the edge of the second port opening to enhance the sealing, especially for the situation where the pressure medium leaks into the environment. The undercut 22 of the second connection seal 20 reduces the risk of the second connection seal 20 detaching from the plane housing surface, especially when the first pressure space 4 is applied. In addition, the undercut 22 can avoid the use of sealants (adhesives) here. Such sealants may have a negative impact on vacuum or clean rooms.

[0123] The second connection seal 20 may form part of the inner or outer protrusion 15a, 15b of the second sealing element 15. The part of the protrusion of the second sealing element 15 formed by the second connection seal 20 may be arranged on a side of the second port opening 20 that is away from and / or opposite to a side of the second port opening 20 where the port protrusion 21 formed by the second connection seal 20 is located.

[0124] Fig.12 The cross-sectional detail of the device 10 shown in FIG. 1 corresponds in position to Fig. 9 , 10 The section line XII indicated in FIG. 1 passes through the elastic elements 1a, 1b and the housing parts 3a, 3b in the region of the first connection seal 30. The first connection seal 30 has an edge of a first port opening, wherein the edge is used to seal the first port I of the clamping and / or braking device 10 to apply a pressure medium to the first pressure chamber 4 of the clamping and / or braking device 10. The edge of the first connection seal 30 at least partially and preferably completely surrounds the first port opening.

[0125] The first connection seal 30 may include an O-ring around the first port opening. The projection 15d of the projection 15b together with the bevel 103 and the first connection seal 30 at the port 1 ensure that, when applied to the first pressure chamber 4, no fluid flows in or out through the edge of the housing. In addition, the use of unsuitable sealants (adhesives) between the two halves of the housing can be avoided. Such sealants may have a negative impact on vacuum or clean rooms.

[0126] By means of the components described herein individually and in combination, a clamp can be provided which can be reliably operated in a vacuum and / or in a clean room and which can optionally be operated in a humid environment without the opening and closing dynamics of the clamp being negatively affected thereby.

[0127] In the specification and drawings, preferred embodiments of the subject matter claimed in the attached claims are described. The optional features disclosed in the above specification, claims and drawings can be used alone or in any combination to implement the subject matter claimed herein in various configurations according to the attached claims.

[0128] The various aspects and embodiments described above can be combined to provide further embodiments. These and other modifications can be made to the embodiments according to the above detailed description. In general, the terms used in the following claims should not be interpreted as limiting the claims to the specific aspects and embodiments disclosed in the specification and claims, but should be interpreted to include all possible embodiments and all equivalent scopes covered by these claims.

Claims

1. An annular elastic element (1a, 1b) for a clamping and / or braking device (10), the element (1a, 1b) comprising: An annular spring plate (16), wherein the annular spring plate (16) has a first annular side surface (16c) and a second annular side surface (16d); a sealing element (15), wherein the sealing element (15) is arranged on the second side surface (16d) of the spring plate (16), and wherein the sealing element (15) forms an inner protrusion (15a) in the region of an inner edge (16a) of the annular spring plate (16), and forms an outer protrusion (15b) in the region of an outer edge (16b) of the annular spring plate (16); It is characterized in that The inner protrusion and / or the outer protrusion (15a, 15b) of the sealing element (15) are respectively formed at least in sections into projections (15c, 15d).

2. The elastic element (1a, 1b) according to claim 1, characterized in that The protrusion (15c) of the inner protrusion (15a) of the sealing element (15) extends radially inward, preferably extends radially inward beyond the inner edge (16a) of the spring plate (16), and / or the protrusion (15d) of the outer protrusion (15b) of the sealing element (15) extends radially outward, preferably extends beyond the outer edge (16b) of the spring plate (16).

3. The elastic element (1a, 1b) according to claim 1 or 2, characterized in that: The inner and / or outer projections (15a, 15b) of the sealing element (15) each have a flat surface at least in sections, which preferably serves as a bearing surface for sealing the pressure chamber (2).

4. The elastic element (1a, 1b) according to claim 3, characterized in that The protrusion (15c) of the inner protrusion (15a) is adjacent to or abuts the flat surface (15e) of the inner protrusion (15a), and / or the protrusion (15d) of the outer protrusion (15b) is adjacent to or abuts the flat surface (15f) of the outer protrusion (15b).

5. The elastic element (1a, 1b) according to any one of the preceding claims, characterized in that The sealing element (15) is a second sealing element (15), and the elastic element further comprises a first sealing element (17), wherein the first sealing element (17) is arranged on the first side surface (16c) of the spring plate (16).

6. The elastic element (1a, 1b) according to claim 5, characterized in that The first sealing element (17) forms a first protrusion (17a).

7. The elastic element (1a, 1b) according to claim 6, characterized in that The first protrusion (17a) is formed between the inner edge and the outer edge of the annular spring plate (16), preferably wherein the first protrusion (17a) is formed in the region of the inner edge (16a) or the outer edge (16b) of the annular spring plate (16).

8. The elastic element (1a, 1b) according to any one of the preceding claims, characterized in that The inner protrusion and / or the outer protrusion of the sealing element (15) respectively protrudes from the second side surface (16d) and is preferably formed on the second side surface (16d), and / or the first protrusion (17a) of the first sealing element (17) protrudes from the first side surface (16c) and is preferably formed on the first side surface (16c).

9. The elastic element (1a, 1b) according to any one of claims 5 to 8, characterized in that The first sealing element (17) also forms a second projection (17b), preferably between the inner edge and the outer edge of the annular spring plate (16), particularly preferably in the region of the outer edge (16b) of the annular spring plate (16) and on the first side surface (16c).

10. The elastic element (1a, 1b) according to any one of the preceding claims, characterized in that Each of the projections of the first and / or second sealing element (15, 17) is annular at least in sections.

11. The elastic element (1a, 1b) according to any one of claims 6 to 10, characterized in that The first projection (17a) and / or the second projection (17b) of the first sealing element (17) has a rounded surface at least in sections.

12. The elastic element (1a, 1b) according to any one of the preceding claims, characterized in that Each of the projections of the first and / or second sealing element (15) is respectively fixed to the spring plate (16), preferably vulcanized on the spring plate (16), or is detachably arranged on the spring plate (16), preferably as an O-ring.

13. The elastic element (1a, 1b) according to any one of the preceding claims, characterized in that Each of the protrusions of the first and / or second sealing element (15, 17) extends along a plane that intersects a plane of the spring plate (16) extending in an annular direction.

14. The elastic element (1a, 1b) according to any one of claims 6 to 13, characterized in that The first projection (17a) of the first sealing element (17) has a circular surface at least in sections.

15. The elastic element (1a, 1b) according to any one of claims 6 to 14, characterized in that The longitudinal axis of the first protrusion (17a) of the first sealing element (17) is substantially perpendicular to the first side surface (16c) of the spring plate (16).

16. The elastic element (1a, 1b) according to any one of the preceding claims, characterized in that The inner and / or outer projections (15a, 15b) of the sealing element (15) each have a flat surface at least in sections, which is preferably a bearing surface for sealing the pressure chamber (2).

17. The elastic element (1a, 1b) according to any one of the preceding claims, characterized in that The outer protrusion of the sealing element (15) is at least sectionally formed on the second side surface (16d) of the spring plate (16), and / or the outer protrusion of the sealing element (15) is at least sectionally arranged radially outside the outer edge of the annular spring plate (16), preferably arranged outside the second side surface (16d) of the spring plate (16).

18. The elastic element (1a, 1b) according to any one of the preceding claims, characterized in that The elastic element (1a, 1b) also includes: a first connecting seal (30), which defines the edge of the first port opening of the first connecting seal (30), wherein the edge is suitable for sealing the first port (I) of the clamping and / or braking device (10) to apply pressure medium to the first pressure chamber (4) of the clamping and / or braking device (10).

19. The elastic element (1a, 1b) according to claim 18, characterized in that The edge of the first connection seal (30) at least partially and preferably completely surrounds the first port opening.

20. The elastic element (1a, 1b) according to any one of the preceding claims, characterized in that The elastic element (1a, 1b) also includes: a second connecting seal (20), which defines the edge of the second port opening of the second connecting seal (20), wherein the edge is suitable for sealing the second port (II) of the clamping and / or braking device (10) to apply pressure medium to the second pressure chamber (2) of the clamping and / or braking device (10).

21. The elastic element (1a, 1b) according to claim 20, characterized in that The second connection seal (20) forms a port bulge (21) along the edge of the second port opening, which at least partially and preferably completely surrounds the second port opening.

22. The elastic element (1a, 1b) according to claim 21, characterized in that The port protrusion (21) of the second connection seal (20) forms an undercut (22) at least in sections at the edge of the second port opening.

23. The elastic element (1a, 1b) according to any one of claims 18 to 22, characterized in that The first connection seal (30) and / or the second connection seal (20) are / is part of the first sealing element (17) and / or the second sealing element (15), respectively.

24. The elastic element (1a, 1b) according to any one of claims 3 to 23, characterized in that The flat surface (15e) of the inner protrusion (15a) merges into the protrusion (15c) of the inner protrusion (15a), and / or the flat surface (15f) of the outer protrusion (15b) merges into the protrusion (15d) of the outer protrusion (15b).

25. The elastic element (1a, 1b) according to any one of claims 18 to 24, characterized in that The first connection seal (30) is at least partially radially offset from the first side surface (16c) and / or the second side surface (16d) of the spring plate (16).

26. The elastic element (1a, 1b) according to any one of claims 20 to 25, characterized in that The second connection seal (20) is at least partially radially offset from the first side surface (16c) and / or the second side surface (16d) of the spring plate (16).

27. The elastic element (1a, 1b) according to any one of claims 20 to 26, characterized in that The annular spring plate (16) is arranged between a section of the second connection seal (20) and a section of the first connection seal (30), and / or the first connection seal (30) and the second connection seal (20) are arranged at opposite sections of the inner edge or the outer edge (16b) of the annular spring plate (16).

28. The elastic element (1a, 1b) according to any one of claims 20 to 27, characterized in that The second connecting seal (20) forms part of the inner or outer protrusion (15b) of the second sealing element (15), preferably wherein the part of the protrusion of the second sealing element (15) is at least sectionally radially offset from the second side surface (16d) of the spring plate (16).

29. The elastic element (1a, 1b) according to claim 28, characterized in that The portion of the protrusion of the second sealing element (15) is formed by the second connecting seal (20) and is arranged on a side of the second port opening (20), the side being away from and / or opposite to a side of the second port opening (20) where the port protrusion (21) is formed by the second connecting seal (20).

30. The elastic element (1a, 1b) according to any of the preceding claims, characterized in that The flat surfaces (15e, 15f) are support surfaces for sealing the pressure chamber (2).

31. The elastic element (1a, 1b) according to any of the preceding claims, characterized in that The first sealing element (17) and / or the second sealing element (15) and / or the first connection seal (30) and / or the second connection seal (20) are each made of an elastic material, preferably rubber.

32. Elastic element (1a, 1b) according to claim 31, wherein said elastic material is made of rubber.

33. A housing part (3a, 3b) for a clamping and / or braking device (10), characterized in that The housing parts (3a, 3b) include: an annular groove (11) for clamping an annular elastic element (1a, 1b) according to any of the preceding claims, wherein the groove (11) forms a first annular edge (12a) and a second annular edge (12b) of the annular opening (12) of the housing part (3a, 3b), wherein the annular groove (11) defines an inner surface (105) of the housing portion (3a, 3b) between the first annular edge (12a) and the second annular edge (12b), The inner surface (105) forms a first bevel (103) in the region of the first annular edge (12a), and the inner surface (105) forms a second bevel (104) in the region of the second annular edge (12b), wherein the orientation of the bevels (103, 104) causes the annular opening (12) to increase toward the first and second edges (12a, 12b).

34. A shell part according to claim 33, wherein the inner surface (105) forms a first abutment surface (101) and a second abutment surface (102), between which a spring plate (16) of an elastic element according to any of the above claims is clamped after formation, wherein the first inclined surface (103) is arranged between the first abutment surface (101) and the first annular edge (12a), and wherein the second inclined surface (104) is arranged between the second abutment surface (101) and the second annular edge (12a).

35. A housing portion according to claim 33 or 34, in, When the elastic element (1a, 1b) is clamped in the groove (11) and the first side surface (16c) faces the inner surface (105), the first protrusion (17a) of the first sealing element (17) is suitable for contacting a first part of the inner surface (105) of the housing part (3a, 3b), preferably wherein the first part of the inner surface (105) is located between the first abutment surface (101) and the second abutment surface (102).

36. A shell part according to any one of claims 33 to 35, wherein the elastic element (1a, 1b) can be clamped between a first abutment surface (101) of the shell part and a second abutment surface (102) of the shell part, and wherein a first portion of the inner surface (105) is located between the first abutment surface (101) and the second abutment surface (102).

37. A housing portion according to any preceding claim, characterised in that The annular groove (11) defines an annular opening in the housing portion, wherein the annular opening is formed between a first annular edge (12a) of the housing portion and a second annular edge (12b) of the housing portion.

38. A housing portion according to any preceding claim, characterised in that The elastic element (1a, 1b) can be clamped between the first annular edge (12a) and the second annular edge (12b).

39. A housing portion according to any preceding claim, characterised in that The contact is sealed against a medium, preferably a fluid, such as a liquid, which enters the groove (11) from outside the housing parts (3a, 3b), preferably in the region of one of the abutment surfaces (101, 102) or the annular edges (12a, 12b).

40. A housing portion according to any preceding claim, characterised in that The first abutment surface (101) forms a first slope (103) and the second abutment surface (102) forms a second slope (104), wherein the slopes (103, 104) are oriented such that the annular opening increases towards the first and second edges (12a, 12b).

41. A housing portion according to any preceding claim, characterised in that The housing parts (3a, 3b) have a notch or recess (110), preferably circular, for accommodating an O-ring.

42. The housing portion according to claim 41, characterized in that The groove or recessed hole (110) preferably completely surrounds the shell part along the circumference of the shell part and is located between the outer edge (100b) of the shell part and the first abutment surface (101) or in the area of ​​the first annular edge (12a), and / or the groove or recessed hole (110) preferably completely surrounds the shell part between the inner edge (100a) of the shell part and the second abutment surface (102), or is located in the area of ​​the second annular edge (12b).

43. A housing portion according to any preceding claim, characterised in that The housing portion is made of a material that is not prone to corrosion.

44. A housing portion according to any preceding claim, wherein: When the elastic element (1a, 1b) is clamped in the groove (11) and the first side surface (16c) faces the inner surface (105), the second protrusion (17b) of the first sealing element (17) is suitable for contacting a second part of the inner surface (105) of the shell part, wherein the second part of the inner surface (105) is located between the first abutment surface (101) and the second abutment surface (102).

45. A housing portion according to any preceding claim, characterised in that The first and / or the second portion is an indentation or depression (106, 107), respectively, in the inner surface (105), preferably wherein the indentation or depression (106, 107) is complementary to the surface shape of the projection in contact therewith.

46. ​​A clamping and / or braking device (10) for clamping and / or braking an object to be clamped and / or braked, characterized in that: include: A first elastic element (1a) according to any one of the preceding claims and a second elastic element (1b) according to any one of the preceding claims; A housing (3) comprising a first housing part (3a), preferably according to any of the preceding claims, having an inner surface (105), and a second housing part (3b), preferably according to any of the preceding claims, having an inner surface (105), wherein the housing parts are arranged relative to each other and fixed to each other such that the inner surfaces (105) of the housing parts (3a, 3b) together define an inner space within the housing (3); one or more clamping elements (8), each clamping element having a clamping surface (7); A spring (1) arranged in the inner space, comprising the first elastic element (1a, 1b) and the second elastic element (1a, 1b), wherein the elastic elements are arranged in the inner space so that a first pressure space (4) is formed in the inner space between the elastic elements (1a, 1b) and the inner surface (105) of the outer shell part, wherein the first pressure space (4) can be vented and can withstand the positive pressure of the pressure medium that can be supplied to the outer shell, wherein the first elastic element (1a, 1b) is clamped in the inner space with its first side surface (16c) facing the inner surface (105) of the first housing part (3a), and wherein the second elastic element (1a, 1b) is clamped in the inner space, with its first side surface (16c) facing the inner surface (105) of the second shell part (3b); wherein the spring (1) is designed so that when the first pressure space (4) is filled with air or discharged with air or the first pressure space (4) is subjected to positive pressure, the bending of at least one of the spring plates (16) of the elastic element (1a, 1b) can be changed, thereby switching the device (10) between an open state and a closed state, wherein in the open state the object (5) to be clamped is separated from the one or more clamping surfaces (7), and in the closed state at least one of the one or more clamping surfaces (7) transmits a clamping force and / or a braking force to the object (5); and The projection (15c, 15d) of the inner or outer projection (15a, 15b) of at least one of the elastic elements (1a, 1b) is adapted to contact a first portion of the inner surface (105) of one of the shell parts (3a, 3b), thereby at least inhibiting a fluid connection between the first pressure space (4) and a transition portion between the shell parts (3a, 3b).

47. The device according to claim 46, wherein The first projection (17a) of the first sealing element (17) of at least one of the elastic elements (1a, 1b) is adapted to contact a second portion of the inner surface (105) of one of the housing parts (3a, 3b), thereby inhibiting at least a fluid connection between a region of the first pressure space (4) and a transition between the housing parts (3a, 3b).

48. The device (10) according to claim 46 or 47, characterized in that The contact is at least partially sealed relative to a medium, preferably a fluid or a liquid, which passes from the environment of the device through the transition of the housing part into the housing or the first pressure space (4), preferably in the area of ​​the at least one clamping surface (7).

49. The device (10) according to any of the preceding claims, characterized in that The area of ​​the first pressure space (4) is arranged between the first protrusion (17a) of the first sealing element (17) of the at least one elastic element and the inner edge or outer edge of the spring plate (16) of the at least one elastic element, or between the second protrusion (17b) of the first sealing element (17) of the at least one elastic element.

50. The device (10) according to any of the preceding claims, characterized in that An undercut (22) is formed on the first shell part by the undercut (22) of the port protrusion (21) of the first elastic element, and / or an undercut is formed on the second shell part by the undercut (22) of the port protrusion (21) of the second elastic element.

51. The device (10) according to any of the preceding claims, characterized in that The inner edge or outer edge of at least one of the spring plates (16) of the elastic element (1a, 1b) abuts against one of the inner surfaces (105), and the outer edge or the inner edge (16a, 16b) of the at least one spring plate (16) presses against the clamping element to generate the clamping force and / or braking force.

52. The clamping and / or braking device (10) according to any of the preceding claims, wherein the first pressure space (4) is arranged outside the spring (1).

53. A clamping and / or braking device (10) according to any of the above claims, wherein the first spring plate (16) of the first elastic element is designed to withstand positive pressure through the first pressure space to reduce its bending, so that when the inner edge or outer edge of the first spring plate (16) abuts against the inner surface (105) of the first shell part, the outer edge or the inner edge of the first spring plate (16) is pressed against one of the clamping elements, thereby achieving the transmission of the clamping force and / or braking force from the clamping surface of the clamping element to the object (5) to be clamped and / or braked, and the device (10) changes from the open state to the closed state.

54. A clamping and / or braking device (10) according to any of the preceding claims, wherein the device (10) is designed so that, by air intake through the first pressure space or by being subjected to positive pressure through the first pressure space (4), a portion of one of the clamping elements is moved away from one of the inner surfaces (105), and / or the bending of at least one of the spring plates (16) of the elastic element is reduced, thereby changing the device (10) from the open state to the closed state.

55. A clamping and / or braking device (10) according to any of the preceding claims, wherein the internal space comprises a second pressure space (2), wherein the second pressure space (2) is arranged in the spring (1) between the elastic elements, preferably wherein the device (10) is designed such that, by air intake through the second pressure space (2) or by the second pressure space (2) being subjected to positive pressure, one of the clamping elements (8) moves toward a portion of one of the inner surfaces (105), and / or the bending of at least one of the spring plates (16) of the elastic element increases, thereby causing the device (10) to change from the closed state to the open state.

56. A clamping and / or braking device (10) according to any of the preceding claims, wherein the spring plate (16) of the at least one elastic element (1a, 1b) is clamped between a first abutment surface (101) of the first shell part and a second abutment surface (102) of the second shell part, and wherein the first portion of the inner surface (105) is located between the first and / or second abutment surface (101, 102) of the first shell part and the transition portion of the shell part (3a, 3b).

57. The clamping and / or braking device (10) according to any of the preceding claims, characterized in that The first portion of the inner surface (105) forms first and second inclined surfaces (103, 104), wherein the protrusion (15c, 15d) of the inner protrusion (15a) of the at least one elastic element (1a, 1b) contacts the second inclined surface of the second abutment surface (102) of the first shell part, and wherein the protrusion (15c, 15d) of the outer protrusion (15b) of the at least one elastic element (1a, 1b) contacts the first inclined surface of the first abutment surface (101) of the first shell part.

58. A clamping and / or braking device (10) according to any of the preceding claims, wherein the second elastic element (1a, 1b) is clamped between a first abutment surface (101) of the second shell part and a second abutment surface (102) of the second shell part, and wherein the first part of the inner surface (105) is located between the first abutment surface (101) of the second shell part and the second abutment surface (102) of the second shell part.

59. The clamping and / or braking device (10) according to claim 58, characterized in that The first abutting surface (101) of the second shell part forms a first inclined surface (103), and the second abutting surface (102) of the second shell part forms a second inclined surface (104), wherein the protrusions (15c, 15d) of the inner protrusion (15a) of the second sealing element (15) of the second elastic element contact the second inclined surface of the second abutting surface (102) of the second shell part, and wherein the protrusions (15c, 15d) of the outer protrusion (15b) of the second sealing element (15) of the second elastic element contact the first inclined surface of the first abutting surface (101) of the second shell part.

60. The clamping and / or braking device (10) according to any of the preceding claims, characterized in that The first elastic element (1a, 1b) and the second elastic element (1a, 1b) are clamped in the internal space (13) so that the flat surfaces (15e, 15f) of the inner protrusion (15a) of the elastic element contact each other, and / or the flat surfaces (15e, 15f) of the outer protrusion (15b) of the elastic element contact each other, preferably thereby defining a second pressure chamber (2).

61. The clamping and / or braking device (10) according to any of the preceding claims, characterized in that The second protrusion (17b) of the first sealing element (17) of at least one of the elastic elements is adapted to contact a second portion of the inner surface (105) of the housing portion, preferably wherein the second portion of the inner surface (105) is located between the first abutment surface (101) and the second abutment surface (102).

62. The clamping and / or braking device (10) according to any of the preceding claims, characterized in that The first and / or the second portion is an indentation or depression (106, 107), respectively, in the inner surface (105), preferably wherein the indentation or depression (106, 107) is complementary to the surface shape of the projection in contact therewith.

63. The clamping and / or braking device (10) according to any of the preceding claims, characterized in that A first connection seal (30) of at least one of the elastic elements seals a first port (I) of the clamping and / or braking device (10) for applying pressure medium to a first pressure chamber (4).

64. The clamping and / or braking device (10) according to any of the preceding claims, characterized in that A second connection seal (20) of at least one of the elastic elements seals a second port (II) of the clamping and / or braking device (10) for applying pressure medium to a second pressure chamber (2) of the clamping and / or braking device (10).

65. The clamping and / or braking device (10) according to any of the preceding claims, characterized in that Each of the housing parts has a notch or recess (110), preferably circular, wherein two contacting O-rings are received in the notch or recess (110) between the housing parts.

66. The clamping and / or braking device (10) according to claim 65, characterized in that The notch or recess (110) of each housing portion preferably completely surrounds the housing portion along its circumference and is located between the outer edge (100b) of the housing portion and the groove (11) or first abutment surface (101).

67. The clamping and / or braking device (10) according to any of the preceding claims, characterized in that Each of the housing parts is made of a material that is not susceptible to corrosion.

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