Clamp and / or brake devices for high humidity environments

Abstract

This disclosure relates to annular elastic elements for clamping and / or braking devices. [Solution] The element includes an annular spring plate having a first annular side surface and a second annular side surface, a first seal element disposed on the first side surface of the spring plate, and a second seal element disposed on the second side surface of the spring plate, wherein the second seal element forms an inner projection in the region of the inner edge of the annular spring plate and an outer projection in the region of the outer edge of the annular spring plate, and the first seal element forms a first projection. The disclosure further relates to a member for a pneumatic clamp and / or brake device and a pneumatic clamp and / or brake device each having an annular elastic element.

Description

Technical Field

[0001] The present disclosure relates to an annular elastic element of a pneumatic clamp and / or brake device and a member, and a pneumatic clamp and / or brake device having such an annular elastic element. The present disclosure further relates to a housing member for clamping an annular elastic element.

Background Art

[0002] In the manufacture of tools or machine members, processing machines, particularly work spindles or other machine tools, are used, and these machines process materials from workpieces, particularly to achieve a desired shape, using tools attached to a shaft. The shaft may be the rotating or swiveling axis of such a machine. Further, a rotatable or swiveling table is used with the shaft to position a tool or workpiece at an appropriate machining position or to move the workpiece at an appropriate rotational speed. A prerequisite for performing precise and efficient machining is, in particular, a high rotational speed of the shaft. Therefore, an emergency system or safety system has the problem of stopping the shaft or holding and fixing it in place when a system failure or malfunction occurs, such as a power outage or cable disconnection.

[0003] At this time, general processing machines are equipped with electromagnetic, hydraulic or pneumatic clamp and / or brake devices. Such devices are provided with a friction lining that can be frictionally connected to the shaft by force transmission. This makes it possible to fix the shaft at different speeds.

[0004] In hydraulic clamping devices, hydraulic fluid is supplied to a chamber, and a rotating shaft or disc is clamped. Passive hydraulic clamps are also known. However, such hydraulic clamps have long reaction times, or short reaction times, which are very expensive. Furthermore, hydraulic materials, especially hydraulic valves and hydraulic pipes, are expensive, and assembly takes a relatively long time. In addition, the hydraulic fluid necessitates further costs to maintain cleanliness around the hydraulic clamp.

[0005] In the case of pneumatic clamps and / or brake devices, compressed air is generally supplied to the elastic elements, particularly the elastic plates, which can overcome some of the drawbacks of the hydraulic clamp devices described above.

[0006] Patent documents 1 and 2 describe a pneumatic clamping device comprising two annular spring plates, which are introduced into the housing of the clamping device to form a pressure chamber, into which compressed air is supplied or the pressure chamber is ventilated, thereby changing the bending of the spring plates and switching between a closed state in which the clamping device is clamped, such as a rotatable shaft, and an open state in which the object to be clamped is free. However, in practice, it has become clear that such clamps fail or cannot operate without problems in high humidity environments.

[0007] Patent Document 3 discloses a pneumatic braking device that is not suitable for high-humidity environments, as described below. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] European Patent No. 1 585 616 [Patent Document 2] European Patent No. 1,651,881 [Patent Document 3] European Patent Application Publication No. 1 629939 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] Based on the prior art described at the beginning, the object of this disclosure is to provide a means for enabling pneumatic clamp and / or brake devices to operate reliably in high-humidity environments. [Means for solving the problem]

[0010] The problem is solved by an annular elastic element having the features described in claim 1, a member having the features described in claim 31, a clamp and / or brake device having the features described in claim 42, and a housing member having the features described in claim 63. Preferred embodiments are described in the dependent claims, specification and drawings.

[0011] The solution according to the present invention provides an annular elastic element for a clamping device and / or a braking device, the element comprising an annular spring plate having a first annular side surface and a second annular side surface, a first sealing element disposed on the first side surface of the spring plate, and a second sealing element disposed on the second side surface of the spring plate, wherein the second sealing element forms an inner projection in the region of the inner edge of the annular spring plate and an outer projection in the region of the outer edge of the annular spring plate, and the first sealing element forms a first projection.

[0012] In this disclosure, the concept of "ring" should not necessarily be understood as a circular shape. Other ring shapes, such as angular ring shapes, are also included in this concept.

[0013] According to the concept of "projection," the first projection protrudes from or extends beyond the surface of the first sealing element. Similarly, the inner and outer projections protrude from or extend beyond one or more surfaces of the second sealing element.

[0014] Preferably, the first sealing element is formed integrally with and / or integrally with the first projection. Preferably, the second sealing element is formed integrally with and / or integrally with the inner and / or outer projections.

[0015] The solution according to the present invention further provides a member for a clamp and / or brake device, the member comprising an annular elastic element and a housing member according to the present invention, the housing member having an annular recess for clamping the annular elastic element, the housing member having an inner surface defined by the recess, and when the elastic element is clamped in the recess with its first side facing the inner surface, a first projection of the first sealing element is configured to establish contact with a first portion of the inner surface of the housing member.

[0016] The solution according to the present invention provides a clamp and / or brake device for clamping and / or brake an object to be clamped and / or braked, the device comprising a first elastic element and a second elastic element according to the present invention, a housing comprising a first housing member having an inner surface and a second housing member having an inner surface, wherein the housing members are arranged relative to each other and fastened together such that the inner surfaces of the housing members together partition an internal space inside the housing, and one or more clamp elements, each clamp element comprising a clamp element having a clamping surface, and a spring disposed in the internal space comprising the first elastic element and the second elastic element, wherein the elastic element is disposed in the internal space such that a first pressure chamber is formed between the elastic element and the inner surface of the housing member, the first pressure chamber is capable of ventilation and of applying positive pressure of a pressure medium that can be supplied to the housing, and the first elastic A stress element is clamped in the internal space with its first side facing the inner surface of a first housing member, and a second elastic element is clamped in the internal space with its first side facing the inner surface of a second housing member, and a spring is configured such that the bending of at least one spring plate of the elastic element is variable when the first pressure chamber is ventilated or aerated, or when positive pressure is applied to the first pressure chamber, so that the device includes a spring that switches between an open state in which the object to be clamped is separated from one or more clamping surfaces and a closed state in which at least one clamping surface transmits a clamping force and / or braking force to the object, and a first projection of the first sealing element of at least one elastic element is configured to establish contact with a first portion of the inner surface of one of the housing members, so that fluid connection between the region of the first pressure chamber and the transition between the housing members is at least prevented.

[0017] The long-standing problem of prone operation of clamp and / or brake devices in high-humidity environments has been overcome by aspects of the present invention. This disclosure is based on the inventors' understanding that:

[0018] When operating the device under the influence of a liquid medium, there is a possibility that the liquid medium may penetrate the housing of the device, particularly in the area of ​​the clamping surface. As a result of this possibility, during operation, the medium may penetrate into the first pressure chamber, causing it to accumulate in the first pressure chamber. The penetration of the liquid medium can lead to component failure due to leakage (e.g., damage to rubber), contamination of the device, and deterioration of the device's response time. The inventors recognize that the penetration of the liquid medium is mainly due to small gaps present in the housing members of the device, particularly in the transition between the two clamping elements or clamping surfaces of the housing members. During the release process, for example, the second pressure chamber is expanded by supplying compressed air to it. At the same time, the first pressure chamber is ventilated. The movement of an elastic element (e.g., a rubberized spring plate) pushes the air out of the first pressure chamber, creating an suction effect through the first pressure chamber. As a result of the liquid medium entering the first pressure chamber, a persistent small leak usually occurs, particularly into the second pressure chamber, resulting in a constant flow of the liquid medium as long as the second pressure chamber is expanding. This effect strengthens the suction, accelerating the failure of the device or causing premature malfunction.

[0019] Given this background, the inventors recognized that by attaching a sealing element having a projection to the side of the elastic element facing the first pressure chamber, this suction action can be interrupted or suppressed, and the aforementioned failures or malfunctions can no longer occur in the device. In particular, by this means, the fluid connection between the first pressure chamber and the transition portion of the housing member or clamp element can be prevented without impairing the opening and closing function or its dynamics of the device. In the elastic element according to the present invention, a second sealing element is positioned on the second side surface of an annular spring plate, and the second sealing element has an inner projection in the region of the inner edge of the annular spring plate of the elastic element and an outer projection in the region of the outer edge of the annular spring plate. These two projections on the inner and outer edges of the spring plate are generally placed on the inner wall of the opposing second elastic element or housing and are used to form a second pressure chamber. Therefore, each of these two projections may preferably have a support surface. In accordance with the inventor's above understanding, the elastic element according to the present invention has a first sealing element on the other (first) side surface of a spring plate which may face a first pressure chamber, the first sealing element forming a first projection which, the first projection, therefore protrudes into the first pressure chamber and is suitable for at least preventing fluid connection between the first pressure chamber and the transition portion of the housing member in the first pressure chamber.

[0020] In the prior art document 3 mentioned at the beginning, the lips 60, 61, 63, and 64 are separate from the polymer plates 57 and 58. Since the lips 60, 61, 63, and 64 do not protrude from or extend beyond the surface of the plates 57 and 58, the polymer plates 57 and 58 do not form protrusions for the lips 60, 61, 63, and 64, which has an adverse effect on the sealing performance required for the environment. The lips are used only to actuate springs and braking elements.

[0021] The first protrusion is preferably formed between the inner edge and the outer edge of the annular spring plate, and particularly preferably, the first protrusion is formed in the region of the inner edge or the outer edge of the annular spring plate so as to be close to the gap between the above-described clamping elements according to whether the clamping action is directed inward or outward. The first protrusion is preferably attached in the region of the transition of the housing member or the clamping element, and is attached to the first side surface of the annular spring plate so as to be suitable for protruding into the first pressure chamber.

[0022] According to a preferred embodiment of the elastic element, the first sealing element further preferably has, on the first side surface, in the region of the edge of the annular spring plate opposite to the edge where the first protrusion is arranged, a second protrusion, and the second protrusion is used to further interrupt or prevent the fluid connection between the first pressure chamber and the transition of the housing member or the clamping element.

[0023] According to a preferred embodiment of the elastic element, the first and / or second sealing elements are vulcanized on the spring plate, whereby they are particularly well fixed.

[0024] Preferably, each of the first protrusion and / or the second protrusion has a surface that is at least partially rounded in order to establish contact on the inner wall of the housing having an arbitrary shape, whereby the prevention or interruption of the above-described fluid connection can be brought about.

[0025] According to a preferred embodiment of the member or device, the housing member has a recess or a concave portion on the inner surface of the housing member, and the recess or the concave portion is preferably complementary to the surface of the first or second protrusion in contact in terms of its shape, whereby the above-described contact becomes particularly effective (sealing).

[0026] The inventors recognize that both the first projection and the second optional projection of the first sealing element are also suitable for preventing or avoiding the outflow of pressurized medium (especially gas) that may be supplied to the first pressure chamber. This makes it easier to use the clamp in vacuum or cleanroom environments, in addition to its use in high-humidity environments.

[0027] To more effectively reduce or prevent the leakage of pressurized media (especially gases) into the environment, the inventors have developed a series of additional optional means for the use of clamps in vacuum or cleanrooms. To ensure more reliable use of clamps in vacuum or cleanrooms, and thereby to realize universally usable clamps, these means can be combined individually and in combination with the means described above for use in high-humidity environments.

[0028] For example, the inner and / or outer projections of the second sealing element preferably each have at least partially flat surfaces, which can function as support surfaces, particularly for sealing, against, for example, the housing wall or other elastic elements. This allows the clamp or its second pressure chamber to be more tightly sealed to prevent or stop the pressure medium from flowing out of the second pressure chamber into the surroundings. The flat surfaces increase resistance to permeation of the pressure medium (especially gases) when the pressure medium is supplied to the second pressure chamber. The flat surfaces reduce or prevent overflow of the medium between the first and second pressure chambers.

[0029] Alternatively or additionally to the flat surface, the inner and / or outer projections of the second sealing element can each form at least partially a bulge (or curved or outward-facing arch) preferably extending radially, thereby providing particularly good sealing for use in a vacuum environment or cleanroom. The bulge may be formed by applying additional (elastic) material to the remaining portion of the projection of the sealing element. These bulges can be made to contact, for example, in the transition area of ​​the housing member, to seal the internal space within the housing member and to seal against the inner wall of the housing member (e.g., a sloped or long chamfered portion). Preferably, each bulge is close to or adjacent to a flat surface. Preferably, each flat surface merges with the bulge. Preferably, the bulge of the outer projection of the second sealing element extends radially outward, preferably beyond the outer edge of the spring plate. Preferably, the bulge of the inner projection of the second sealing element extends radially inward, preferably beyond the inner edge of the spring plate.

[0030] The bulge is particularly advantageous for sealing the first pressure chamber against the gap at the transition between adjacent housing members. The bulge has the effect of preventing little to no flow of the medium through the housing edge during the operation of the first pressure chamber.

[0031] The flat surface further assists the displacement of the bulge relative to the inner wall of the housing member, and also assists the bulge's actions as described above. This assistance is particularly pronounced when the flat surface is close to, adjacent to, and / or merges with the attached bulge, as described above. The flat surface and the respective attached bulge thus form a synergistic combination of features, although they can also exist independently.

[0032] With regard to use in a vacuum or cleanroom, the elastic material used in the elastic element may preferably be a suitable material that releases little or no material into the vacuum (high media resistance), is suitable for high temperatures, and / or has low gas permeability.

[0033] For use in high-humidity environments, vacuums, or cleanrooms, the housing components may be made of suitable materials that are resistant to corrosion, preferably steel, in order to avoid the release of rust into the vacuum or cleanroom.

[0034] To further contribute to particularly good sealing performance when used in a vacuum environment or cleanroom, the elastic element according to the present invention may have a first connection seal for a first connection for supplying a pressure medium to a first pressure chamber, the first connection seal sealing the first connection. Preferably, the edge of the first connection seal may at least partially, preferably completely, surround the first connection opening and may have an O-ring shape.

[0035] To further contribute to particularly good sealing for use in vacuum environments or cleanrooms, the elastic element according to the present invention may have a second connecting seal for a second connection for supplying a pressure medium to a second pressure chamber, the second connecting seal sealing the second connection. Preferably, the edge of the second connecting seal may at least partially, preferably completely, surround the second connection opening and may have an O-ring shape. Particularly preferably, the edge may form a connecting projection of the second connecting seal, the connecting projection at least partially forming an undercut on the edge of the second connection opening. The housing member may be gripped at the rear by the undercut of the connecting projection of the elastic element. The undercut of the second connecting seal reinforces the seal outward and reduces the risk of the second connecting seal lifting off the flat surface of the housing, particularly when supplying to the first pressure chamber. Furthermore, the undercut may avoid the use of sealants (adhesives) at this location, as such sealants may have adverse effects on vacuum or cleanrooms.

[0036] To further contribute to particularly good sealing for use in vacuum environments or cleanrooms, the housing members of the components or apparatus according to the present invention may have grooves or notches, preferably circular, for receiving O-rings. The grooves or notches with O-rings assist the aforementioned functions of the bulge and the first connecting seal so as to prevent fluid from flowing in or out through the edges of the housing when the first pressure chamber is operating. Furthermore, the sealant (adhesive) between the housing halves, which is undesirable for use in vacuum and cleanrooms, can be omitted.

[0037] By using the methods described herein individually or in combination, it is possible to provide a clamp that can reliably operate in high-humidity environments and, optionally, in a vacuum or cleanroom, without adversely affecting the opening and closing dynamics of the clamp.

[0038] When describing features not included in the claims in a brief description of the disclosure, these features are not essential features in the sense that they must be included in the claims for the purpose of describing the disclosure, but they are particularly important preferred realizations of the invention described in the claims and may be combined with any of the claims, or optionally combined with each other. [Brief explanation of the drawing]

[0039] [Figure 1A] This figure schematically shows a cross-section of the inward-facing passive pneumatic clamp and / or brake device according to the present invention in the closed state. [Figure 1B] This figure schematically shows a cross-section of the outward-facing passive pneumatic clamp and / or brake device according to the present invention in the closed state. [Figure 2A] This figure schematically shows a cross-section of the inward-facing passive pneumatic clamp and / or brake device according to the present invention in the open state. [Figure 2B] This figure schematically shows a cross-section of the outward-facing passive pneumatic clamp and / or brake device according to the present invention in the open state. [Figure 3A] This figure schematically shows a cross-section of the inward-facing active pneumatic clamp and / or brake device according to the present invention in the open state. [Figure 3B] This figure schematically shows a cross-section of the outward-facing active pneumatic clamp and / or brake device according to the present invention in the open state. [Figure 4A] This figure schematically shows a cross-section of the inward-facing active pneumatic clamp and / or brake device according to the present invention in the closed state. [Figure 4B] This figure schematically shows a cross-section of the outward-facing active pneumatic clamp and / or brake device according to the present invention in the closed state. [Figure 5A] This figure shows a three-dimensional cross-section of a pneumatic clamp and / or brake device according to the present invention. [Figure 5B]This figure shows an example of deformation of the housing member extracted from Figure 5A. [Figure 5C] This figure shows an example of deformation of the housing member extracted from Figure 5A. [Figure 5D] This figure shows an example of deformation of the housing member extracted from Figure 5A. [Figure 6A] This figure shows an embodiment of the elastic element according to the present invention. [Figure 6B] This figure shows an embodiment of the elastic element according to the present invention. [Figure 6C] This figure shows an embodiment of the elastic element according to the present invention. [Figure 7] This figure shows a cross-sectional view of an example of deformation of a housing member of a member or device according to the present invention. [Figure 8] This figure shows a cross-section perpendicular to the clamping plane of the apparatus according to the present invention. [Figure 9] This is a top view of the elastic element according to the present invention. [Figure 10] This is a top view showing an example of a modified housing member of a member or device according to the present invention. [Figure 11] This figure shows a portion of the region of the second connecting seal in a cross-section perpendicular to the clamp plane, corresponding to the position of cross-section XI of the elastic element and housing member shown in Figures 9 and 10, in an embodiment of the apparatus according to the present invention. [Figure 12] This figure shows a portion of the region of the first connecting seal in a cross-section perpendicular to the clamp plane, corresponding to the position of cross-section XII of the elastic element and housing member shown in Figures 9 and 10, in an embodiment of the apparatus according to the present invention. [Modes for carrying out the invention]

[0040] Components shown in multiple drawings are given the same reference numeral.

[0041] This disclosure relates to annular elastic elements and members for pneumatic clamps and / or brake devices, and pneumatic clamps and / or brake devices having such annular elastic elements.

[0042] In this specification, when referring to a “clamp” device or “clamping device,” “clamping force,” or “clamping” process, the “brake” device or “brakeing device,” “braking force,” or “braking” process are also included.

[0043] Figures 1A to 5A and Figure 8 schematically show cross-sections of such a clamping device 10 according to the present invention, which has a housing 3 including two housing members 3a and 3b, and a spring 1 disposed within the housing 3 including at least two annular elastic elements 1a and 1b according to the present invention.

[0044] In this case, the clamping device 10 according to the present invention includes: a first elastic element 1a and a second elastic element 1b according to the present invention; a housing 3 including a first housing member 3a having an inner surface and a second housing member 3b having an inner surface, wherein the housing members 3a and 3b are arranged relative to each other and fastened together such that the inner surfaces of the housing members 3a and 3b together define an internal space 13 inside the housing 3; one or more clamping elements 8, each clamping element 8 having a clamping surface 7; a spring 1 disposed in the internal space 13, including the first elastic element 1a and the second elastic element 1a, wherein the elastic elements 1a and 1b are arranged in the internal space 13 such that a first pressure chamber 4 is formed between the elastic elements 1a and 1b and the inner surfaces of the housing members 3a and 3b in the internal space 13, The pressure chamber 4 of the device 1 is capable of ventilation and the application of positive pressure of a pressure medium that can be supplied to the housing 3. The first elastic element 1a is clamped in the internal space 13 with its first side facing the inner surface of the first housing member 3a, and the second elastic element 1b is clamped in the internal space 13 with its first side facing the inner surface of the second housing member 3b. The spring 1 is configured such that the bending of at least one spring plate of the elastic elements 1a and 1b is variable when the first pressure chamber 4 is ventilated or aerated, or when positive pressure is applied to the first pressure chamber 4. This allows the device 10 to switch between an open state in which the object 5 to be clamped is separated from one or more clamping surfaces 7 and a closed state in which at least one clamping surface 7 transmits clamping force and / or braking force to the object 5. The device 10 according to the present invention further includes the means described at the beginning, which enable reliable operation of the device in a high-humidity environment. These methods will be explained in more detail in relation to Figures 6 to 12.

[0045] Figures 1A, 1B, 4A, and 4B each show the clamping device 10 in a closed state, with the clamping surface 7 of the clamping element 8 in contact with the circumference of the object 5. The clamping element 8 is also called a clamping lip. The clamping element 8 may be formed integrally with the rest of the housing members 3a and 3b, or it may be a structurally separate member from the rest of the housing members 3a and 3b.

[0046] The clamping force or clamping action of the clamping surface 7 on the object 5 to be clamped occurs in the clamping plane formed by two vectors that form the radii of the annular elastic elements 1a, 1b or the annular recess 11, respectively (see Figure 5A). The axis 9 extends through the center point of the ring of the member described herein as annular, and may therefore be referred to as the principal axis of the clamping device 10, and may extend perpendicular to the clamping plane. Where “inner” and “outer” projections, edges, or ends are referred to herein, the inner edge, projection, or end is closer to the axis 9 than the corresponding outer edge, projection, or end. The same applies to other members.

[0047] The clamping device 10 may be formed to be rotationally symmetric with respect to the spindle 9. The spindle 9 may extend through an opening in the clamping device 10 (opening 14 in Figure 5B) at approximately or precisely at its center. In Figures 1A and 4A, the object to be clamped 5, for example, the rotatable shaft of a machine or table, is positioned within the opening 14, and therefore the clamping force of the clamping device is directed radially inward toward the spindle 9 (perpendicular to the spindle 9) in the clamping plane. In Figures 1B and 4B, the object to be clamped 5 is positioned outside the clamping device 10, and therefore the clamping force of the clamping device is directed radially outward toward the spindle 9 (perpendicular to the spindle 9) in the clamping plane.

[0048] In Figures 1A, 2A, 3A, and 4A, the clamping element 8 is located between the spring 1 and the opening 14 or the spindle 9. On the other hand, in Figures 1B, 2B, 3B, and 4B, the object to be clamped 5 encloses the clamping device 10 at least partially, so the clamping element 8 is located between the object 5 and the opening 14 or the spindle 9. In Figures 1B, 2B, 3B, and 4B, instead of the object to be clamped 5, it is possible to introduce a member into the opening 14 that at least partially fills the opening 14, with the spindle 9 extending through this member.

[0049] In each of Figures 1A to 5A, the spring 1 is clamped between two contact surfaces (101 and 102 in Figures 5C and 5D) within the housing 3 of the clamping device 10 and extends between the two contact surfaces. In the initial state in Figures 1A to 2B when the device 10 is not pressurized, the spring 1 may be slightly bent so as to be fixed within the housing 3 in that state, and the same can be applied to each of the other states of the device 10, the degree of bending of the spring 1 depends on which state the device 10 is in. When the device 10 is in a state where the spring 1 is bent (for example, more bent than the initial unpressurized state such as the open state), the ventilation of the inner pressure chamber 2 and the outer pressure chamber 4 of the spring 1 causes the spring 1 to at least partially relax while it presses against the radial contact surface, slightly expanding the gap. As a result, the housing 3 elastically deforms in the area of ​​the clamp element 8 or the clamp surface 7, and the clamp surface 7 thereby comes into contact with the object 5 and is pressed against the object 5 with a (predetermined) clamping force to tightly clamp the object 5. As shown in Figures 1A and 1B, the object 5 is tightly clamped and the clamping device 10 is in the closed state. In the closed state of the device 10, the spring 1 may remain slightly bent even after partially relaxing in order to be fixed within the housing 3 in that state.

[0050] In this case, the clamping element 8 may be an elastic element such as a spring fork, and in the initial unpressurized state of the device 10, the elastic element is brought from a relaxed starting position to a position under tension by bending the spring fork 8 until, for example, equilibrium is achieved between the restoring force of the elastic element 8 and the elasticity of the spring 1 in the initial unpressurized state, due to the elasticity of the (slightly) bent spring 1. In this equilibrium state, the clamping surface 7 can press against the object 5.

[0051] In the closed state, there is an optional possibility to increase the clamping force by a predetermined value by supplying additional compressed air (e.g., at 4 bar or 6 bar) to the outer pressure chamber 4. This is suggested in Figures 1A and 1B by an optional additional compressed air pump (booster) 6 and the shaded area (compressed air) in the outer pressure chamber 4. The outer pressure chamber 4 may be connected to an air connection I (also called the "close") by an opening in the housing 3, and the compressed air pump 6 may be connected to the air connection I.

[0052] This makes it possible to operate the device 10 so that, for example, a switch is made between the damped movement of the supplied object 5 (when it is not pressurized) and the full clamping of the object (when it is fully pressurized).

[0053] Although two pressure chambers 2 and 4 are shown and described here as examples, the clamping device 10 can also operate with only one pressure chamber, which could be, for example, the inner pressure chamber 2 or the outer pressure chamber 4.

[0054] Figures 2A and 2B show the clamping device 10 of Figures 1A and 1B in the open state, respectively. In the open state, the clamping surface 7 does not contact the circumference of the object 5, or is separated from the circumference of the object 5. The inner pressure chamber 2 may be connected to an air connection section II (also called "open") by an opening in the housing 3, and a compressed air pump 6 may be connected to the air connection section II.

[0055] By supplying compressed air (e.g., 4 bar or 6 bar) to the inner pressure chamber 2 via the compressed air pump 6 and venting the outer pressure chamber 4, the spring 1 is bent or stretched more strongly (convexly) than in the closed state shown in Figures 1A and 1B, and the distance between the spring 1 or the two contact surfaces is shortened radially. To release the clamp, the clamp surface 7 is lifted away from the object 5. The object 5 is freely movable (e.g., rotatable around the axis 9 or linearly movable along the axis 9), and the clamping device 10 is open.

[0056] The device 10 can be switched between a closed state and an open state in both directions.

[0057] Such a pneumatic clamp 10 has many advantages compared to a hydraulic clamp.

[0058] By using a combination of an elastic member, in this case a spring 1 including elastic elements 1a and 1b, and compressed air, a very short reaction time can be obtained, for example, when switching between an open state and a closed state, and a secure clamping of the object 5 is also provided. The spring 1 may preferably be plate-shaped, as shown in detail in Figure 5, and two overlapping elastic elements 1a and 1b form the spring 1 and the internal pressure chamber 2 of the spring 1 between the plates 1a and 1b. The plates 1a and 1b may be annular, as shown in Figure 5, and may optionally have additional radial slots, which makes it possible to change the inner diameter with particularly small force. The elastic elements 1a and 1b may be coated with rubber, at least in the area of ​​the slots, to establish the sealing required for compressed air. The elastic elements 1a and 1b are generally pressure-resistant and configured to be elastically bendable, and are arranged within the housing 3 of the clamping device 10. Inside the spring 1, an inner pressure chamber 2 is formed between the elastic elements 1a and 1b, and an outer pressure chamber 4 is formed between each elastic element 1a and 1b and the housing 3 or housing members 3a and 3b of the clamping device 10. Figure 5 is a three-dimensional representation of a clamping device 10 similar to those in Figures 1A and 2A.

[0059] As shown in Figure 1A, the spring 1 is at least partially relaxed by ventilation or supply of compressed air to the outer pressure chamber 4 and ventilation to the inner pressure chamber 2, thereby providing a clamping force around the object 5 to be clamped, particularly the shaft 5. This ensures that the object 5 is clamped or the shaft 5 immediately stops if the energy or pressure is interrupted, thus providing a secure clamp. Depending on the dimensions, such a pneumatic clamp 10 can achieve a holding torque of several hundred Nm to a maximum of several thousand Nm, and the holding torque can be further increased by supplying additional compressed air to the outer pressure chamber 4, as indicated by the pressure pump 6 (booster) in Figure 1A. In this case, several bars (e.g., 4 bar or 6 bar) of compressed air are sufficient to provide several times the holding torque obtained without the booster. In this process, when switching the open or closed state of the clamp 10, the slight lateral bending (perpendicular to the longitudinal axis) of plates 1a and 1b generates a large amount of elasticity that can be used to clamp or release the pre-tensioned clamping device 10. Therefore, reliable clamping and release are possible even with a rapidly rotating machine shaft 5.

[0060] In the case of pneumatic materials, the cost and assembly costs are lower than those of hydraulic materials, and there are no additional costs for cleaning the equipment due to the use of compressed air. Such pneumatic clamps can also be made smaller in overall dimensions because applying the required clamping force only requires a small lateral bend and a small longitudinal extension of the spring (a small change in the longitudinal extension), and therefore a small volume of the pressure chamber.

[0061] In the case of pneumatic clamps, in principle, a distinction is made between passive clamping devices 10 as shown in Figures 1A to 2B and active clamping devices 10 as shown in Figures 3A to 4B.

[0062] Spring 1, in its initial unpressurized state, may be bent (laterally) with different strengths and therefore may be shortened radially to different degrees. The inner surface of housing 3 can adapt to or determine the bending of elastic elements 1a and 1b. Stopper surfaces corresponding to elastic elements 1a and 1b may be formed, for example, by the inner wall of housing. The inner wall of housing may be formed complementary (e.g., concave) to the (e.g. convex) bending of elastic elements 1a and 1b.

[0063] In a passive clamping device 10, the spring 1 is usually slightly elastically bent (e.g., convex) or pretensioned in its initial unpressurized state, and the clamping device 10 may be closed (Figures 1A and 1B). The clamping device 10 is opened only by a force acting from the inside, through the supply of compressed air to the inner pressure chamber 2 (Figures 2A and 2B). In many cases, since the spring 1 is slightly bent in its initial unpressurized state, the spring 1 transmits the elasticity provided by the energy stored in the spring 1 as a clamping force to the object 5 to be clamped, in the case of clamping or when the pressure drops.

[0064] In the active clamping device 10, the spring 1, in its initial unpressurized state (Figures 3A and 3B), is more strongly curved convexly than in the passive clamping device, particularly strongly outward in the lateral direction. As a result, the distance between the two radial contact surfaces becomes smaller, and the clamping device 10 opens. No clamping force acts on the object 5 through the clamping surface 7. Since the clamping surface 7 does not contact the object 5 or is separated from it, the object is free.

[0065] Due to the plastic deformation of the elastic elements 1a and 1b, the spring 1 can bend more strongly laterally outward in the same housing 3 in its initial unpressurized state than in the case of a passive clamping device, and therefore can be significantly shortened radially. This small radial extension of the elastic elements 1a and 1b in the initial unpressurized state can result in the clamping device 10 being open in the initial unpressurized state. Even in the case of plastic deformation, the spring is fixed to the housing because the elastic elements 1a and 1b are elastically bent and pressed against the contact surface. The internal space or recess of the housing can accommodate the greater curvature resulting from the plastic deformation in the initial state.

[0066] As shown in Figures 4A and 4B, in order to move the clamp to the closed state, it is necessary to actively induce a clamping force from the outside. Here, compressed air is introduced into the outer pressure chamber 4 by the compressed air pump 6, and compressed air is supplied to the spring 1 from the outside, thereby actively relaxing the spring 1, reducing the curvature of the spring 1, increasing the distance between the two contact surfaces, and causing the housing 3 to elastically deform in the area of ​​the clamp element 8 or clamp surface 7, so that the clamp surface 7 comes into contact with the object 5, exerting a clamping force on the object 5, thereby tightly clamping the object 5. The active clamping device 10 then enters the closed state.

[0067] Depending on the application area and prescribed safety regulations, active or passive clamping devices 10 are used. Generally, passive clamping devices are used when safety clamping is the primary requirement. In such pneumatic passive clamping systems, a predetermined clamping force can be generated even before pressurization, when the device is assembled in conjunction with the overall system. This clamping force is applied to the object 5 to be clamped. By applying positive or negative pressure, the force transmitted to the object can be increased, decreased, or completely stopped, opening up a variety of applications. In contrast, active clamping devices are generally used when the clamping device is intended to perform a deliberate work process, such as tool changing.

[0068] As shown in Figure 5A, the housing 3 of the clamping device 10 according to the present invention includes two housing members 3a and 3b, which are assembled by fastening each other with fastening means such as screws, and in the assembled state, the two housing members 3a and 3b define an internal space 13 between the housing members 3a and 3b within the housing 3, and a spring 1 is disposed within the internal space 13 together with the annular elastic elements 1a and 1b according to the present invention. As shown in Figures 5A to 5D, the housing members 3a and 3b each define a recess 11, which is similarly annular and used to receive the annular elastic elements 1a and 1b. At least a portion of the first contact surface 101 of the housing member is extendable perpendicularly to the radial direction R of the annular recess 11, and / or a portion of the second contact surface 102 of the housing member is extendable perpendicularly to the radial direction R of the annular recess 11.

[0069] An opening 14 (Figure 5B) extends through the center of the housing 3, into which an object 5 to be clamped, such as a shaft, can be introduced. The housing can extend up to 360° around the opening and at least partially surrounds the object 5 in at least one plane called the clamping plane. The central spindle 9 of the clamping device passes through the center of the opening 14 and extends perpendicular to the clamping plane. In the clamping devices shown in Figures 1A, 2A, 3A, 4A, and 5A, the spindle 9 passes through the center of the shaft along its longitudinal axis.

[0070] One or more clamping surfaces 7 are present along the circumferential direction of the housing 3 or the opening 14, and the clamping surfaces 7 can apply a clamping force to the outer circumference of the object 5 when the housing 3 is elastically deformed in the area of ​​the clamping element 8 or the clamping surface 7, thereby clamping the object 5. In order to effectively open and close the clamping device 10 on the object 5 to be clamped without risking damage to the object 5, it is desirable that the clamping force is distributed symmetrically along the clamping surface 7 or along the circumference of the object 5. If the clamping force is distributed asymmetrically, the object 5 may be damaged. Preferably, one or both contact surfaces 101, 102 are formed circularly in the clamping plane. Preferably, the clamping surface 7 is formed circularly in the clamping plane. The clamping element 8 may be formed in annular shape. All annular or circular members described herein may, individually or in combination, have as their center point the intersection of the main shaft 9 with the clamping plane (e.g., the center point of the opening 14).

[0071] Figure 5B shows an embodiment of a member according to the present invention. The member comprises an annular elastic element 1a and a housing member (in this case, the upper housing member 3a in Figure 5A), the housing member 3a having an annular recess 11 for clamping the annular elastic element 1a, and the housing member 3a having an inner surface defined by the recess 11 (see 105 in Figure 7). The annular recess 11 preferably defines an annular opening 12 in the housing member, the annular opening being formed between a first annular edge 12a and a second annular edge 12b of the housing member. The elastic element 1a is clampable between the first annular edge 12a and the second annular edge 12b.

[0072] When the elastic element 1a is introduced into the recess 11 through the opening 12 with its first side surface (see 16c in Figure 6C) facing the inner surface and clamped in the recess 11, a first pressure chamber 4 is formed between the inner surface and the elastic element 1a. In this case, the elastic element according to the present invention has the means mentioned at the beginning, which enables the member to be used reliably in a high-humidity environment. These means will be described in more detail with reference to Figures 6 to 12.

[0073] As shown in Figures 5C and 5D, the illustrated elastic element 1a of the spring 1 extends from the first contact surface 101 within the housing member 3a to the second contact surface 102 within the housing member 3a, and can contact the second contact surface 102. In this case, the first contact surface 101 is positioned radially outward from the second contact surface 102 when viewed from the center point of the opening 14.

[0074] Figure 5C shows a portion of the housing member 3a shown in Figure 5B, in which the upper plate 1a of the spring 1 collides with and preferably contacts the first contact surface 101. Figure 5D shows a portion of the housing member 3a shown in Figure 5B, in which the upper plate 1a of the spring 1 collides with and preferably contacts the second contact surface 102. However, it is also possible that one or more additional members exist radially between the elastic element 1a and one or more contact surfaces 101, 102, and that the elastic element 1a exerts elastic force on the contact surfaces 101, 102 through these members.

[0075] As is evident from Figures 5B and 5D, the elastic element 1a is clamped in the recess 11 between the inner surfaces of the housing member 3a. During assembly, each plate of the spring 1 is introduced into the recess 11 of the respective attached housing member through the opening 12 along the inner surface of the housing member 3a, in the direction of the main axis 9 of the clamping device 10, until each plate abuts against the stoppers 112 and 122 at each end of the two contact surfaces 101 and 102, and therefore can no longer be introduced into the recess 11. Since the portion of the elastic element 1a extending in the clamping plane or radially in the annular recess is larger than the portion of the internal space defined by the housing member, the plate 1a may be bent or pre-tensioned in its initial unpressurized state.

[0076] Figures 6A to 6C show in more detail embodiments of the elastic element means according to the present invention for use in high-humidity environments, as well as optional means for use in vacuum or cleanrooms.

[0077] Figure 6A shows annular elastic elements 1a, 1b for a clamp and / or brake device 10 according to the present invention, the elements 1a, 1b comprising: an annular spring plate 16 having a first annular side surface 16c and a second annular side surface 16d; a first seal element 17 positioned on the first side surface 16c of the spring plate 16; and a second seal element 15 positioned on the second side surface 16d of the spring plate 16, the second seal element 15 forming an inner projection 15a in the region of the inner edge 16a of the annular spring plate 16 and an outer projection 15b in the region of the outer edge 16b of the annular spring plate 16. The first seal element 17 forms a first projection 17a.

[0078] Figures 6B and 6C show that the first projection 17a is formed between the inner edge 16a and the outer edge 16b of the annular spring plate 16. Here, as an example, the first projection 17a is formed in the region of either the inner edge 16a or the outer edge 16b of the annular spring plate 16.

[0079] Figures 6A and 6B further show that the first sealing element 17 preferably forms an optional second projection 17b on the first side surface 16c in the region of the outer edge 16b of the annular spring plate 16.

[0080] The projections 15a, 15b, 17a, and 17b of the first and / or second sealing elements 15 and 17 may be at least partially annular and may extend annularly around the axis 9. The projections 15a, 15b, 17a, and 17b of the first and / or second sealing elements 15 and 17 may each be fixable to the spring plate 16 and preferably vulcanized, or may be detachably positioned from the spring plate 16, preferably as O-rings.

[0081] Figures 6A and 6C further show that the longitudinal axis of the first projection 17a of the first sealing element 17 extends perpendicularly to the first side surface 16c of the spring plate 16.

[0082] As shown in Figures 6B and 6C, the inner projections 15a and / or outer projections 15b of the second seal element 15 each have at least partially flat surfaces 15e and 15f, which function as support surfaces against, for example, the (inner) housing wall or other elastic elements to partition and seal the second pressure chamber 2. These figures also show that the inner projections and / or outer projections 15a and 15b of the second seal element 15 each form bulges 15c and 15d that extend at least partially radially.

[0083] Preferably, as shown in Figure 6B, the bulge 15d of the outer projection 15b of the second seal element 15 extends radially outward, preferably beyond the outer edge 16b of the spring plate 16. Preferably, the bulge 15d is close to or adjacent to a flat surface 15f. Preferably, the flat surface 15f merges with the bulge 15d.

[0084] Preferably, as shown in Figure 6C, the bulge 15c of the inner projection 15a of the second sealing element 15 extends radially inward, preferably beyond the inner edge 16a of the spring plate 16. Preferably, the bulge 15c is close to or adjacent to a flat surface 15e. Preferably, the flat surface 15e merges with the bulge 15c.

[0085] The first sealing element 17 and / or the second sealing element 15 may be manufactured individually or together from an elastic material, preferably rubber or other suitable material, and the sealing elements are fixed to the spring plate 16 (e.g., by vulcanization).

[0086] Figure 7 shows housing members 3a and 3b of a member or device according to the present invention, which are advantageous further developments of housing member 3a in Figure 5B. In addition to the inner surface 105, recess 11, first contact surface 101 and second contact surface 102, the housing members have other advantageous and preferred applications.

[0087] When the elastic elements 1a and 1b are clamped within the recess 11 with their first side surface 16c facing the inner surface 105, the first projection 17a of the first sealing element 17 preferably contacts a first portion of the inner surface 105 of the housing members 3a and 3b in a sealing manner. The first portion may have a recess or depression 106 in the housing members 3a and 3b. Preferably, the surface shapes of the first projection 17a and the first portion 106 are at least partially complementary in order to establish contact that seals particularly effectively. When the elastic elements 1a and 1b are clamped within the recess 11 with their first side surface 16c facing the inner surface 105, the second projection 17b of the first sealing element 17 preferably contacts another portion of the inner surface 105 of the housing members 3a and 3b in a sealing manner. This other portion may have a recess or depression 107 in the housing members 3a and 3b. Preferably, the surface shapes of the second projection 17b and portion 107 are at least partially complementary in order to establish contact that is particularly effective in sealing. Each of the two projections 17a, 17b obstructs or completely blocks the fluid connection between the first pressure chamber 4 and the surrounding housing, particularly in the transition area of ​​the two adjacent housing members 3a, 3b.

[0088] The housing members 3a and 3b include annular recesses 11 for clamping annular elastic elements 1a and 1b, the recesses 11 forming a first annular edge 12a and a second annular edge 12b of the annular opening 12 of the housing members 3a and 3b, the annular recesses 11 define the inner surface 105 of the housing members 3a and 3b between the first annular edge 12a and the second annular edge 12b, the inner surface 105 forming a first inclination 103 (or long chamfer) in the region of the first annular edge 12a, and the inner surface 105 forming a second inclination 104 (or long chamfer) in the region of the second annular edge 12b, the inclinations 103 and 104 are aligned so that the annular opening 12 expands toward the first and second edges 12a and 12b.

[0089] The inner surface 105 can form a first contact surface 101 and a second contact surface 102, which are configured to clamp the spring plates 16 of the elastic elements 1a and 1b according to the present invention between them, the first inclination 103 is positioned between the first contact surface 101 and the first annular edge 12a, and the second inclination 104 is positioned between the second contact surface 102 and the second annular edge 12b. When the elastic elements 1a and 1b are clamped in the recess 11 with the first side surface 16c facing the inner surface 105, the bulges 15c and 15d preferably contact the inclinations 103 and 104 in a sealing manner.

[0090] As shown in Figure 7, the first contact surface 101 may form a first inclination 103 (or a long chamfer) or merge with the first inclination 103, and / or the second contact surface 102 may form a second inclination 104 (or a long chamfer) or merge with the second inclination 104, wherein the inclinations 103 and 104 are preferably aligned such that the annular opening 12 or recess 11 expands toward the first and second edges 12a and 12b, respectively (see Figures 7 and 5B). Each of these inclinations 103 and 104 largely prevents the bending force of the clamp element 8 from being transmitted to the clamp element 8 by the second seal element 15, and rather the spring plate 16 or inner edge 16a primarily transmits the force for clamping or braking the object 5 to the clamp element 8 and clamp surface 7. This protects the second seal element 15 and makes the opening and closing process of the device more reliable.

[0091] To ensure additional preferred sealing for use in high-humidity and / or vacuum environments or cleanrooms, bulges 15c and 15d are provided that block the inclined spaces and contact inclines 103 and 104. The bulges 15c and 15d are advantageous for the sealing of the first pressure chamber 4 to the gaps at the transitions of the clamping elements 8 of adjacent housing members 3a and 3b. The bulges at the edges of the housing with inclines 103 and 104 are advantageous in that little or no medium flows in or out through the edges of the housing during the operation of the first pressure chamber 4.

[0092] On the one hand, the flat surfaces 15e and 15f increase the resistance to permeation of the pressurizing medium (especially gas) when the pressurizing medium is supplied to the second pressure chamber 2. The flat surfaces 15e and 15f reduce or prevent overflow of the medium between the first pressure chamber 4 and the second pressure chamber 2. Furthermore, the flat surfaces 15f and 15e assist the displacement of the bulges 15c and 15d relative to the slopes 103 and 104 of the housing, and therefore the action of the bulges described above. This assistance is particularly noticeable when the flat surfaces 15e or 15f are adjacent to and / or merge with the bulges 15c or 15d to which they are attached, as described in relation to Figures 6B and 6C. Thus, the flat surfaces and the bulges to which they are attached form a combination of features that act synergistically, although they may exist individually. When considering vacuum operation, the respective sealing elements 17a and 17b are considered additional barriers that assist in the sealing of the first pressure chamber 4 to the environment.

[0093] The housing members 3a and 3b may have grooves or notches 110, preferably circular, for receiving O-rings. The grooves or notches 110 may preferably completely surround the housing members 3a and 3b along the circumference of the housing member in the region of the first annular edge 12a, or between the outer edge 100b of the housing member and the first contact surface 101 or recess 11. Alternatively or additionally, the grooves or notches 110 may preferably completely surround the housing members 3a and 3b along the circumference of the housing member in the region of the second annular edge 12a, or between the inner edge 100a of the housing member and the second contact surface 102 or recess 11.

[0094] Preferably, the housing members are made of a corrosion-resistant material.

[0095] Figure 8 shows a clamp and / or brake device 10 according to the present invention. Figure 8 shows a device 10 having an inward clamping action, for example, as shown in Figures 1A, 2A, and 5.

[0096] In Figure 8, the first projection 17a of the first sealing element 17 of at least one of the elastic elements 1a, 1b preferably contacts a first portion (e.g., 106) of the inner surface 105 of one of the housing members 3a, 3b in a sealed manner, thereby at least preventing fluid connection between the region of the first pressure chamber 4 and the transition between the housing members 3a, 3b. This contact may be at least partially sealed to a medium, preferably a fluid or liquid, flowing into the housing 3 from outside the device 10 through the gap in the transition between the housing members 3a, 3b or the clamp element 8.

[0097] In Figure 8, the region of the first pressure chamber 4 is located between the first projection 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 projection 17b of the first sealing element 17 of at least one elastic element.

[0098] Any second projection 17b of the first sealing element 17 of at least one elastic element 1a, 1b establishes contact with a second portion (e.g., 107) of the inner surface 105 of the housing members 3a, 3b, the second portion of the inner surface 105 preferably located between the first contact surface 101 and the second contact surface 102 of the housing members 3a, 3b. This projection can also reduce fluid connection between the first pressure chamber 4 and the outer region of the clamp element 8. The inner surface 105 may have one or more recesses or depressions 106, 107, the shape of which is preferably complementary to the surface of the contacting projections 17a, 17b.

[0099] When Figures 6, 7, and 8 are combined, it is clear that the first contact surfaces 101 of each housing member 3a, 3b form a first inclination 103, and the second contact surfaces 102 of each housing member 3a, 3b form a second inclination 104. The bulge 15c of the inner projection 15a of the second sealing element 15 of the first elastic element contacts the second inclination 104 of the second contact surfaces 102 of the housing members 3a, 3b, and the bulge 15d of the outer projection 15b of the second sealing element 15 of the first elastic element contacts the first inclination 103 of the first contact surfaces 101 of the housing members 3a, 3b.

[0100] In Figure 8, the first elastic element 1a and the second elastic element 1b are clamped in the internal space 13 such that the flat surfaces 15e of the inner projections 15a of the second sealing elements 15 of the elastic elements 1a and 1b are in contact with each other, and / or the flat surfaces 15f of the outer projections 15b of the second sealing elements 15b of the elastic elements 1a and 1b are in contact with each other, thereby partitioning the second pressure chamber 2 and sealing the second pressure chamber 2 in particular while supplying the pressure medium.

[0101] Figure 9 shows embodiments of elastic elements 1a and 1b according to the present invention, having a first connecting seal 30 and / or a second connecting seal 20.

[0102] The annular spring plate 16 may be positioned between the portion of the second connecting seal 20 and the portion of the first connecting seal 30. The first connecting seal 30 and the second connecting seal 20 can be positioned on opposing portions of the inner edge 16a or outer edge 16b of the annular spring plate 16.

[0103] The first connecting seal 30 and / or the second connecting seal 20 may each be made from an elastic material, preferably rubber.

[0104] The first connecting seal 30 may be positioned at least partially radially inward or outward offset from the inner edge 16a and / or outer edge 16b (see Figure 9) of the spring plate 16 of the elastic elements 1a and 1b. The first connecting seal 30 may be a portion of the first sealing element 17 and / or the second sealing element 15. The first connecting seal 30 may project radially beyond the inner edge 16a or the outer edge 16b (see Figure 9).

[0105] The second connecting seal 20 may be positioned at least partially radially inward or outward offset from the inner edge 16a and / or outer edge 16b (see Figure 9) of the spring plate 16 of the elastic elements 1a and 1b. The second connecting seal 20 may be a portion of the first sealing element 17 and / or the second sealing element 15. The second connecting seal 20 may project radially beyond the inner edge 16a or the outer edge 16b (see Figure 9).

[0106] Figures 11 and 12 show cross-sectional portions of the apparatus 10 according to the present invention, respectively. The left and right halves of Figures 11 and 12 show cross-sections of the elastic elements 1a and 1b according to the present invention shown in Figure 9 attached to the housing members 3a and 3b according to Figure 10, respectively. In this case, the elastic elements 1a and 1b are clamped in the recess 11 between the inner edge 100a (or clamp element 8 having a clamping surface 7) and the outer edge 100b of the housing members 3a and 3b, such that the first connecting seal 30 contacts the area of ​​the housing members 3a and 3b for the first connecting portion I, and the second connecting seal 20 contacts the area of ​​the housing members 3a and 3b for the connecting portion II. By doing this twice, the two members according to the present invention are prepared and fastened to each other, as shown in Figures 11 and 12.

[0107] The portion of the cross-section of the device 10 shown in Figure 11 corresponds, at its location, to the cross-section XI of the elastic elements 1a, 1b and housing members 3a, 3b in the region of the second connection seal 20 shown in Figures 9 and 10. The second connection seal 20 has an edge along the second connection opening, which is used to seal the second connection portion II of the clamp and / or brake device 10 in order to supply a pressure medium to the second pressure chamber 2 of the clamp and / or brake device 10. The second connection seal 20 forms a connection projection 21 along the edge of the second connection opening, which at least partially, preferably completely, surrounds the second connection opening.

[0108] The connecting projection 21 of the second connecting seal 20 has an undercut 22 formed at least partially on the edge of the second connecting opening to reinforce the seal, particularly against leakage of the pressurized medium into the environment. The undercut 22 of the second connecting seal 20 reduces the risk of the second connecting seal 20 lifting off the flat surface of the housing, particularly when supplying the first pressure chamber 4. Furthermore, the undercut 22 can avoid the use of sealant (adhesive) at this location, as such sealants can have adverse effects on vacuum or cleanroom environments.

[0109] The second connecting seal 20 can form the inner or outer projections 15a, 15b of the second sealing element 15. The projections of the second sealing element 15 formed by the second connecting seal 20 may be located on the side surface of the second connecting opening 20 that is facing away from and / or opposite to the side surface of the second connecting opening 20 where the connecting projection 21 is formed by the second connecting seal 20.

[0110] The portion of the cross-section of the device 10 shown in Figure 12 corresponds, at that location, to the cross-section XII of the elastic elements 1a, 1b and housing members 3a, 3b in the region of the first connection seal 30 shown in Figures 9 and 10. The first connection seal 30 has an edge of the first connection opening, which is used to seal the first connection I of the clamp and / or brake device 10 in order to supply a pressure medium to the first pressure chamber 4 of the clamp and / or brake device 10. The edge of the first connection seal 30 surrounds the first connection opening at least partially, preferably completely.

[0111] The first connection seal 30 may include an O-ring surrounding the first connection opening. The bulge 15d of the projection 15b with inclination 103, together with the first connection seal 30 at the connection I, ensures that fluid does not flow in or out through the edge of the housing when supply is made to the first pressure chamber 4. In addition, this may eliminate the need for undesirable sealants (adhesives) between the housing halves, which can adversely affect vacuum or cleanroom environments.

[0112] By using the methods described herein individually and in combination, it is possible to provide a clamp that can operate reliably in high-humidity environments, and optionally in vacuum and / or cleanrooms, without adversely affecting the dynamics of the clamp's opening and closing.

[0113] The specification and drawings describe preferred embodiments of the subject matter claimed by the attached claims. Any features disclosed in the above specification, claims and drawings may be used individually and in any combination in various embodiments for the implementation of the subject matter claimed by the attached claims.

[0114] The various aspects and embodiments described above can be combined to provide further embodiments. These and other modifications can be made to the embodiments in light of the above detailed description. In general, the concepts used in the following claims should not be interpreted as limiting the claims to specific aspects and embodiments disclosed in the specification and claims, but rather as encompassing all possible embodiments, along with the entire scope of the equivalents for which these claims are entitled. [Explanation of Symbols]

[0115] 1 spring 1a, 1b Elastic elements 2, 4 pressure chambers 3 Housing 3a, 3b Housing members 5 objects 6. Compressed air pump 7. Clamping surface 8 clamping elements 9 Main axis 10. Clamp and / or brake device 11 recess 12 Annular openings 12a First annular margin 12b Second annular margin 13 Interior space 14 Opening 15. Second seal element 15a Medial protrusion 15b Lateral process 15c, 15d bulge 15e, 15f flat surface 16 Spring Plate 16a Inner edge 16b Outer edge 16th century, first side 16d Second side 17. First Seal Element 17a First projection 17b Second projection 20. Second connection seal 21 Connecting protrusions 22 Undercut 30 First connection seal 100a Inner edge 100b outer edge 101 First contact surface 102 Second contact surface 103 First slope 104 Second slope 105 Inner self 106, 107 A depression or recess 110 Grooves or notches 112, 122 Stopper I. First connection section II. Second connection section R Radial direction XI, XII cross section

Claims

[Claim 1] Annular elastic elements (1a, 1b) for a clamp and / or brake device (10), wherein the elements (1a, 1b) are An annular spring plate (16) having a first annular surface (16c) and a second annular surface (16d), A first sealing element (17) is positioned on the first side surface (16c) of the spring plate (16), A second sealing element (15) is disposed on the second side surface (16d) of the spring plate (16), wherein the second sealing element (15) has an inner projection (15a) formed in the region of the inner edge (16a) of the annular spring plate (16) and an outer projection (15b) formed in the region of the outer edge (16b) of the annular spring plate (16), In an elastic element including, An elastic element (1a, 1b) characterized in that the first sealing element (17) forms a first projection (17a).

Images