Press ring

Abstract

Press ring for connection with a pressing tool, with a first segment and a second segment movably connected to the first segment, wherein the first segment and the second segment form a pressing surface, wherein the first segment and the second segment each have receiving elements for connection to corresponding connecting elements which are arranged on pressing jaws of the pressing tool, for transmitting a pressing force to the pressing ring, and characterized in that a synchronizing element is arranged between the first segment and the second segment so that synchronization of the first segment and the second segment is achieved.

Description

[0001] The present invention relates to a press ring, in particular for connection to a pressing tool, and to a pressing device with such a pressing tool for connection to the press ring.

[0002] Known pressing devices have a drive unit, which is particularly designed as an electromechanical or electrohydraulic drive unit. A tool holder is connected to the drive unit. A pressing tool is detachably or permanently connected to the tool holder. The pressing tool has two pressing jaws, which are moved toward each other by a movement of the drive unit into a closed position to generate a pressing force. It is known that the pressing tool, and in particular the pressing jaws themselves, provide a pressing contour through suitable pressing surfaces, and thus a workpiece, such as a press fitting, is pressed directly by the pressing jaws of the pressing tool.

[0003] Alternatively, it is known to transfer the pressing force generated by the pressing jaws of the pressing tool to pressing rings. The pressing contour or pressing surfaces are provided by the pressing ring. In this case, it is possible to first place the pressing ring around the workpiece and then connect the pressing jaws of the pressing tool to the pressing ring to press the workpiece. In particular, due to a possible change in the orientation between the pressing tool and the pressing ring or the pressing loop, it is possible to press workpieces even in inaccessible areas. Furthermore, the use of pressing rings makes it easy to use different pressing geometries / contours. All that is required is a different pressing ring without having to replace the pressing tool.

[0004] Known press rings typically have two segments, through which the pressing contour is formed by corresponding pressing surfaces. The two segments are connected by a single joint. However, this significantly increases the size of the press ring, which may prevent its use in inaccessible areas.

[0005] Furthermore, after the pressing operation, the pressing ring must be opened again to remove it from the workpiece. This typically requires each segment to be moved individually, requiring the user to reach both segments. This further complicates the use of conventional pressing rings in inaccessible areas.

[0006] The object of the present invention is to provide a press ring that is compact and easy to use.

[0007] The object is achieved by a press ring according to claim 1 and a pressing device according to claim 11.

[0008] The press ring for connection to a pressing tool according to the present invention has a first segment and a second segment movably connected to the first segment, in particular in a hinged manner. In this case, a pressing surface or a pressing contour is formed by the first segment and the second segment. During pressing, a workpiece to be pressed, such as a press fitting, rests against the pressing surface formed jointly by the first segment and the second segment and is pressed by moving the first segment and the second segment towards one another. For this purpose, the first segment and the second segment each have receiving elements for connection to corresponding connecting elements which are arranged on pressing jaws of the pressing tool for transmitting a pressing force to the press ring.Thus, pressing force is transferred from the connecting elements of the pressing jaws of the pressing tool via the receiving elements to the first segment and the second segment of the pressing ring to press the workpiece.

[0009] According to the invention, a synchronizing element is arranged between the first segment and the second segment, so that synchronization of the first segment and the second segment is created. In particular, synchronization is achieved during a closing movement or an opening movement. Due to the synchronizing element, a force distribution is achieved between the first segment and the second segment, so that a virtually identical pressing force is always applied to the workpiece by the first segment and the second segment. An uneven force distribution applied to the first segment and the second segment is transferred by the synchronizing element to the other segment and compensated for in such a way that the first segment and the second segment close synchronously and thereby transfer the same pressing forces to the workpiece.This ensures even compression of the workpiece and prevents damage to the workpiece due to uneven force distribution. Alternatively, or in addition to this, the press ring can be reopened by moving only one segment, as the other segment moves with the opening movement due to the synchronous movement. This eliminates the need for both segments to be accessible to the user, making operation / opening of the press ring possible even in inaccessible areas. This simplifies opening to apply the press ring to the workpiece, as well as releasing the press ring after compression, with the user only having to move one of the two segments.

[0010] Preferably, the synchronizing element is arranged in corresponding recesses in the first segment and the second segment. The synchronizing element is arranged simultaneously in a first recess in the first segment and a second recess in the second segment for transmitting force from the first segment to the second segment and vice versa. Preferably, the press ring has contact surfaces in the region of the connection between the first segment and the second segment. The recesses in the first segment and the second segment are arranged opposite one another, so that the synchronizing element can be arranged between the contact surfaces. In particular, the recesses have a conical shape, a spherical shape, or the like.

[0011] Preferably, the synchronizing element is a separate component. In particular, the synchronizing element is designed as a separate component from the first segment and the second segment.

[0012] The synchronizing element is preferably a ball, in particular a metal ball. This allows the first segment and the second segment to roll along the spherical surface of the synchronizing element during closing or to slide along the spherical surface, thus achieving a uniform closing movement of the first segment and the second segment.

[0013] Alternatively, the synchronizing element is a cylinder, and in particular a metal cylinder, wherein the cylinder axis is arranged collinearly with the rotational axes of the first segment and the second segment. Thus, the first segment and the second segment roll or slide on the outer surface of the cylinder, thereby creating synchronization between the first segment and the second segment.

[0014] Preferably, the receiving element is designed as a spherical recess. This allows the pressing ring to rotate relative to the pressing tool around the receiving elements. However, other shapes of the receiving elements are also possible, whereby the shape of the receiving elements always corresponds to the shape of the respective connecting elements of the pressing jaws.

[0015] Preferably, the first segment is connected to the second segment by exactly one joint or a movable connection, by means of which in particular a rotation axis is formed. Alternatively, the first segment is connected to the second segment via two rotation axes. In other words, the first segment is connected to the second segment via two joints. This makes it possible to arrange the pressing ring between the pressing jaws without the joint-like connection of the first segment to the second segment coinciding with a pivot point or a pivot axis of the pressing jaws. The pressing ring can therefore be designed more compactly and can in particular be designed independently of the design of the rotation axis / pivot axis of the pressing jaws. In particular, the two rotation axes are parallel to one another. The rotation axes point in particular in an axial direction.Here and in the following, the axial direction refers to a direction perpendicular to a plane in which the pressing jaws or the pressing ring are moved, in particular from an open position to a closed position or vice versa. In other words, the axial direction is perpendicular to a direction of the pressing force.

[0016] Preferably, the first segment is movably connected to the second segment via a tab. For example, the first segment can be movably or articulatedly connected to the tab, for example by a fastening bolt which defines the first axis of rotation. Furthermore, the second segment is movably and in particular articulatedly connected to an opposite end of the tab, for example by a fastening bolt which defines the second axis of rotation. The tab thus forms two joints or two axes of rotation, which enable a movable connection between the first segment and the second segment. In particular, two tabs are provided on opposite sides of the first segment and the second segment, respectively. The first segment and the second segment are thus arranged between the two tabs.

[0017] The tab preferably covers the recess in which the synchronizing element is arranged. In particular, if two tabs are provided on opposite sides of the segments, the recesses for receiving the synchronizing element can be axially delimited by the tabs. In particular, if the synchronizing element is designed as a cylinder, the synchronizing element can be easily arranged between the first segment and the second segment, and the tabs can then be attached to connect the first segment to the second segment.

[0018] Preferably, only the first segment and the second segment have a pressing surface for pressing the workpiece. Thus, the first segment and the second segment already provide the complete pressing contour. In particular, the one or more tabs do not have any pressing surfaces. Thus, the tabs serve exclusively to connect the first segment and the second segment and do not directly contact a workpiece.

[0019] Preferably, a spring element is arranged between the first segment and the second segment, which spring element preloads the first segment and the second segment into a closed position. The press ring can thus be opened against the preload of the spring element, subsequently positioned around the workpiece and in particular the press fitting, and then released. Due to the preload of the press ring by the spring element, the press ring remains connected to the workpiece and can subsequently be connected to the pressing tool in a corresponding orientation relative to the pressing tool. This enables one-handed operation of the press ring. The synchronization also prevents damage to the spring element, since simultaneous opening of the first segment and the second segment is achieved via the synchronization element.This prevents an unwanted, excessive opening / deflection of just one of the segments, which could result in damage to the spring element. Even if an impact occurs, for example, due to the compression ring being dropped, on only one of the segments, the impact is simultaneously transferred into a movement of the other segment thanks to the synchronization element. This transfers the impact into a movement of both segments, thus preventing or at least dampening damage to the segments and / or the spring element.

[0020] Furthermore, the present invention relates to a pressing device with a drive unit and a tool holder, wherein a pressing tool is permanently or detachably connected to the tool holder. Here, the pressing tool has connecting elements that are connected to the corresponding receiving elements of a pressing ring as described above. In particular, the pressing tool has pressing jaws, wherein each pressing jaw has a connecting element that is inserted into a corresponding receiving element of the first segment and the second segment. This makes it possible to transmit force from the pressing tool, which is moved by the drive unit, to the pressing ring in order to move the latter into a closed position and thereby press a workpiece such as a press fitting.

[0021] The invention is explained in more detail below using preferred embodiments with reference to the accompanying drawings.

[0022] The figures show: Fig. 1 a press ring according to the present invention, Fig. 2 a pressing tool for connecting to the pressing ring of Figure 1, Fig. 3 the pressing ring of the Fig. 1 connected to the pressing tool of the Fig. 2 and Fig. 4A-4D Detailed views of the press ring according to the present invention.

[0023] The press ring 10 according to the present invention shown in Fig. 1 has a first segment 12 and a second segment 14, which are movably connected to one another. For this purpose, the first segment 12 is articulated to the second segment 14 via a tab 18. The connecting bolts 16 respectively connect the first segment to the tab 18 and the second segment 14 to the tab 18, thereby providing the axes of rotation 20 for the movable connection of the first segment 12 and the second segment 14. In particular, two tabs are provided on opposite sides of the segments 12, 14, so that the segments are arranged between the tabs 18. The first segment 12 and the second segment 14 form a pressing surface 22, via which a pressing force is applied to a workpiece. A receiving element 24 is arranged at the end of the first segment 12 opposite the tab 18.As described further below, the receiving element 24 is designed to receive a corresponding connecting element 46 (. Fig. 2) of the pressing tool 30. Via the connecting element 46 and the receiving element 24 of the pressing ring 10, a pressing force is transferred from the pressing tool 30 to the pressing ring 10, so that the workpiece 62 is pressed. The second segment 14 also has a receiving element 24 at its end opposite the tab 18, which can be designed identically to the receiving element 24 of the first segment. In particular, the receiving elements 24 of the first segment 12 and the second segment 14 are designed as spherical recesses. The rotationally symmetrical design of the receiving elements 24 enables the pressing ring 10 to rotate around the connecting elements 46 of the pressing tool 30, so that the pressing ring 10 can be used in different positions. In particular, the first segment 12 and the second segment 14 each have exactly one receiving element 24.

[0024] Reference is made to the Fig. 2. The pressing tool 30 according to the present invention has a first pressing jaw 32 with a first end 32A and an opposite second end 32B. The pressing jaw 30 also has a second pressing jaw 34 with a first end 34A and an opposite second end 34B. The first pressing jaw 32 and the second pressing jaw 34 are connected to one another via a tab 42. The first pressing jaw 32 and the second pressing jaw 34 are each connected to the tab 42 via bolts 40. The bolts 40 define a rotation axis 43 about which the pressing jaws 32, 34 can be pivoted. Connecting elements 46 are arranged at the respective first ends 32A, 34A of the pressing jaws 32, 34, which, as described above, can be inserted into the receiving elements 24 of the pressing ring 10 for transmitting a pressing force from the pressing tool 30 to the pressing ring 10.A contact surface 44 is arranged at the respective second end 32B, 34B of the pressing jaws 32, 34. By means of the tab 42, the pressing tool 30 can be connected to a tool holder of the pressing device via a connection opening 38. A pressing force can then be applied to the pressing tool via the contact surface 44, pivoting the pressing jaws 32, 34 about the rotation axes 43, so that the first ends 32A, 34A of the pressing jaws 32, 34 are moved toward each other.

[0025] Fig. 3 shows the connection of the pressing tool 30 with the pressing ring 10. In this case, a movement of the pressing jaws of the pressing tool 30 is transferred to the pressing ring, so that the pressing ring can be moved from an open position to a closed position for pressing a workpiece by the pressing ring 10.

[0026] Reference is made below to the Fig. 4A-4D. Details of the press ring 10 are shown. Fig. 4A and Fig. 4B show the pressing ring 10 in a closed position ( Fig. 4A) and an open position ( Fig. 4B). Here, a ball 90 is arranged between the first segment 12 and the second segment 14 as a synchronizing element in corresponding recesses 94. The ball 90 ensures even force distribution during the closing movement of the press ring. This achieves synchronization of the first segment 12 and the second segment 14 as long as a pressing force is applied to the press ring 10 by the pressing tool 30. By providing the ball 90, the segments 12, 14 of the press ring 10 thus run synchronously, which leads to even force distribution and thus even pressing of the workpiece or press fitting. Alternatively or additionally, the ball 90 achieves synchronization when the press ring 10 is opened after pressing or when the press ring 10 is applied to the workpiece. For this purpose, it is only necessary for one of the two segments 12, 14 to be moved into the open position by the user.Due to the ball 90 acting as a synchronizing element, the corresponding other segment 12, 14 also moves into an open position. The other segment therefore does not need to be accessible to the user. This makes it particularly easy to apply the pressing ring 10 to the workpiece before pressing or to release the pressing ring 10 after pressing.

[0027] Furthermore, in the Fig.4A-4D show that a spring element 92 is provided between the first segment 12 and the second segment 14, which preloads the first segment 12 and the second segment 14 into a closed position (shown in Figures 4B and 4D). Thus, to connect the press ring 10 to the pressing tool 30, the user can push the press ring 10 apart against the preload by the spring element 92 into an open position, wrap it around the workpiece and in particular the press fitting, and then release the press ring 10 so that it moves into a closed position while simultaneously remaining arranged on the workpiece.

[0028] Due to the synchronizing element, only one segment 12, 14 needs to be moved to move both segments 12, 14 into the open position. The other segment 12, 14 moves with it. Subsequently, the connecting elements 46 of the pressing tool 30 can be inserted into the receiving elements 24 of the pressing ring 10. Thus, the spring element 93 allows for particularly easy handling of the pressing ring 10, and a secure and, in particular, one-handed connection of the pressing ring 10 to the pressing tool 30 is possible.

Claims

[1] Press ring for connection with a pressing tool, with a first segment and a second segment movably connected to the first segment, wherein the first segment and the second segment form a pressing surface, wherein the first segment and the second segment each have receiving elements for connection to corresponding connecting elements which are arranged on pressing jaws of the pressing tool, for transmitting a pressing force to the pressing ring, and characterized by , that a synchronizing element is arranged between the first segment and the second segment so that synchronization of the first segment and the second segment is achieved. [2] Press ring according to claim 1, characterized by that the synchronizing element is arranged in corresponding recesses in the first segment and the second segment. [3] Press ring according to claim 1 or 2, characterized bythat the synchronizing element is a separate component. [4] Press ring according to one of claims 1 to 3, characterized by that the synchronizing element is a ball. [5] Press ring according to one of claims 1 to 3, characterized by that the synchronizing element is a cylinder. [6] Press ring according to one of claims 1 to 5, characterized by that the receiving element is designed as spherical recesses. [7] Press ring according to one of claims 1 to 6, characterized by that the first segment is connected to the second segment with at least two axes of rotation. [8] Press ring according to one of claims 1 to 7, characterized by a tab, the tab being movably connected to the first segment and movably connected to the second segment. [9] Press ring according to one of claims 1 to 8, characterized bythat only the first segment and the second segment have a pressing surface. [10] Press ring according to one of claims 1 to 9, characterized by that a spring element is arranged between the first segment and the second segment, which preloads the first segment and the second segment into a closed position. [11] Pressing device with a drive unit and a tool holder, wherein a pressing tool is connected to the tool holder and the pressing tool has connecting elements, wherein the connecting elements of the pressing tool are connected to corresponding receiving elements of a pressing ring according to one of claims 1 to 10.

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