Riveting device, mandrel receptable, and method for assembling a riveting device
Patent Information
- Application Number
- EP2023739463
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-06-30
- Filing Date
- 2023-06-29
- Publication Date
- 2025-05-07
Smart Images
Figure 1.1
Abstract
Description
[0001] Riveting tool, mandrel holder and method for assembling a riveting tool
[0002] The present disclosure relates to a riveting tool, and more particularly to a blind rivet setting tool, a blind rivet nut setting tool, and a blind rivet stud setting tool. The present disclosure further relates to a mandrel holder and a method for assembling a riveting tool.
[0003] Riveting tools are typically used to create a riveted joint between two or more materials, such as sheet metal, at a junction where the materials lie against one another. To create the riveted joint, a plastically deformable, usually cylindrical connecting element, generally referred to as a rivet, is used. The rivet usually has a prefabricated setting head at one end. To create the riveted joint, the rivet is inserted into a connecting hole provided at the joint up to the setting head and then the other end of the rivet is plastically deformed into a closing head.
[0004] Riveting tools can also be used to add threads to thin-walled components. Rivet nuts or rivet bolts are used for this purpose, combining a rivet with a threaded element. The rivet nuts or rivet bolts are inserted into a prefabricated rivet hole in the component, and then a portion of the rivet is plastically formed into a closing head.
[0005] Conventional riveting devices usually comprise a riveting tool which is designed to effect a plastic deformation which forms the closing head. To actuate the riveting tool, the riveting devices have a drive device accommodated in a device housing. The drive device is often electromechanical and comprises, for example, an electric motor and a spindle gear designed as a ball screw drive with a threaded spindle and a spindle nut. The spindle nut is usually driven by the electric motor and the threaded spindle is secured against twisting by torque supports so that when the spindle nut rotates, the threaded spindle moves axially and acts on the riveting tool. Such a riveting device is known from EP 0 527 414 A1.The riveting tool is designed and configured for blind riveting and is able to pull a rivet mandrel out of the rivet body of a blind rivet by exerting a pulling movement, compressing the rivet body to create a closing head. The pulling movement is carried out by a mandrel holder which is driven by the drive device via the threaded spindle and to which the rivet mandrel is fixed. The mandrel holder is accommodated in a tool housing and is held therein so that it can move relative to a mouthpiece fastened to the tool housing in order to carry out the pulling movement. The rivet mandrel is inserted into the tool housing via the mouthpiece as far as the mandrel holder, and the riveting tool is then placed on top of this at the point to be riveted.
[0006] The mandrel holder is typically one of the maintenance parts of the riveting tool. Therefore, the mandrel holder is usually removed from time to time for maintenance and / or cleaning purposes. To facilitate disassembly and reassembly, the mandrel holder is often screwed onto the front end of the threaded spindle, as is the case with the familiar riveting tool.
[0007] To lock the mandrel holder in a desired rotational position to prevent rotation relative to the threaded spindle, a locking mechanism is typically used. WO 02 / 098585 A2 discloses a locking mechanism which, through an axial locking movement, locks the mandrel holder in a desired rotational position to prevent rotation relative to the threaded spindle. Due to its design, the locking mechanism must be actively moved by a user to unlock it. Furthermore, the locking mechanism is relatively bulky in the axial direction due to the axial locking movement.
[0008] In the course of continuous further development, there can therefore be seen a need to improve the compactness of a riveting tool. This is based on the expectation that improved compactness will make it easier to reach hard-to-reach riveting points in order to be able to set a rivet there. Furthermore, it is expected that improved compactness will make the riveting tool lighter in weight and / or more manageable and / or easier to handle. One embodiment of a basic riveting tool comprises a riveting tool and a drive device for actuating the riveting tool. For example, the riveting tool, in particular the riveting tool, is suitable for blind riveting, in which the riveting process is carried out by means of a rivet mandrel from one side of the material to be provided with a blind rivet. Instead of a blind rivet, a blind rivet nut or a blind rivet screw can also be used.
[0009] The riveting tool preferably has a mouthpiece and a mandrel holder movable relative to the mouthpiece along or in the direction of an effective axis. For example, the mandrel holder comprises a chuck housing movable relative to the mouthpiece along or in the direction of the effective axis and at least one clamping element, in particular a clamping jaw, movable in the chuck housing along a clamping path.
[0010] The drive device preferably has a drive element which is particularly designed to be moved along the effective axis, in particular to drive the mandrel holder. The drive element can be a threaded spindle, for example of a spindle gear, in particular a ball screw drive. Alternatively, the drive element can be a reciprocating piston. The drive device can be an electromechanical drive device, for example with an electric motor, or a pneumatic drive device, for example with a pneumatic drive, or a hydraulic drive device, for example with a hydraulic drive.
[0011] Preferably, the drive element is connected to the mandrel holder via a screw connection, either directly or indirectly, for example, via an intermediate element. In particular, the screw connection is formed by rotating the mandrel holder and the drive element relative to one another about a rotational axis. For example, the rotational axis is arranged coaxially with the effective axis, or the rotational axis lies on the effective axis.
[0012] The basic riveting device preferably has a locking element. The locking element is preferably in a locking position or is brought into a locking position. In the locking position, the mandrel holder is preferably mechanically locked relative to the drive element in a preferably predetermined or fixed rotational position against rotation about the rotational axis.
[0013] An improved compactness is achieved by a design of the riveting tool in which the locking element is moved into the locking position by a radial movement relative to the axis of rotation. Due to the radial movement of the locking element, the riveting tool can be constructed more compactly in the axial direction than would be possible with an axial movement of the locking element. This, in turn, makes the riveting tool easier to handle. It also makes it easier to reach hard-to-reach riveting locations so that a rivet can be inserted there.
[0014] In one embodiment, the screw connection comprises two connecting parts which have threads and can be rotated relative to one another about the axis of rotation, of which connecting part is assigned, in particular is assigned, to the mandrel receptacle and the other connecting part is assigned to the drive element. In particular, one connecting part is fixedly arranged on the mandrel receptacle, in particular is formed thereon, for example, is molded onto it. In particular, the other connecting part is fixedly arranged on the drive element, in particular is formed thereon, for example, is molded onto it.
[0015] In this case, the improved riveting device can be designed such that the thread of one of the connecting parts is formed in a threaded bore, and one connecting part has a through hole extending radially therefrom, in which the locking element is accommodated so as to be radially movable with respect to the axis of rotation. In particular, the other connecting part has a recess on its circumference, such as a pocket, into which the locking element engages in a locking manner. This favors a technically simple design in order to realize a radial locking movement of the locking element.
[0016] The improved riveting tool can further be designed such that the recess and / or the locking element has a run-out contour in the circumferential direction with respect to at least one of the connecting parts. This allows the locking element to be unlocked in a simple manner by exerting a rotational force. This is because the locking element is pressed radially outward from the recess via the run-out contour when a predetermined rotational force acts on the screw connection.
[0017] The improved riveting tool can further be designed such that the connecting part provided with the recess has at least one, preferably several further recesses on the circumference, into which the locking element can be introduced. This means that the mandrel holder can be locked in further rotational positions by rotating the mandrel holder through 360 degrees relative to the drive element. This makes it easier for the mandrel holder to be locked as close as possible to a desired axial distance of the mandrel holder from the drive element and / or as close as possible to an axial stop for the mandrel holder. This also makes it possible to adjust the axial distance of the mandrel holder from the drive element in the smallest steps by locking the locking element in the corresponding recess depending on the desired axial distance.
[0018] The improved riveting tool can further be designed such that the locking element engages a contour of the drive element in the locking position and is disengaged from it in an unlocking position. By using the drive element directly for locking, an axial intermediate element can be eliminated. This measure also aims to reduce the axial length of the riveting tool.
[0019] The improved riveting tool can further be designed such that the locking element is arranged outside the screw connection in the axial direction relative to the rotation axis. As a result, the load-bearing capacity of the threads forming the screw connection remains unaffected by the locking element.
[0020] The improved riveting tool can further be designed such that a spring ring surrounds the axis of rotation and, in particular, has a spring-elastic effect radially with respect to the axis of rotation. In particular, the spring ring is operatively connected to the locking element in the radial direction, so that in an unlocking position of the locking element, in which the locking element is in a radially extended position, the spring ring acts on the locking element with a radial force. For example, the spring ring surrounds the connecting part provided with the through-hole for the locking element and / or bears against it. For example, the locking element has a groove into which the spring ring engages with a circumferential section. For example, the spring ring is an O-ring.
[0021] These measures are aimed at creating a haptic effect which evokes the tactile perception of a click in the user. This is achieved, for example, by the locking element being pressed radially outwards out of the locking position against the force of the spring ring and then automatically returning to the locking position under the force of the spring element when the user rotates the mandrel holder relative to the drive element about the rotation axis with a rotational force which overcomes the locking position. The spring ring can also be used to hold the locking element captively on the riveting tool, in particular on the connecting part provided with the through-hole.
[0022] In a further embodiment, a tool housing is provided in which the mandrel receptacle is accommodated so as to be movable along the effective axis. For example, the mouthpiece is arranged, for example, attached or molded onto an axial end of the tool housing.
[0023] In this embodiment, the improved riveting tool can be designed such that the spring ring is a sealing ring, which serves to seal the mandrel holder against the tool housing. This gives the spring ring a dual function. This dual function achieves improved functional integration.
[0024] The improved riveting tool can further be designed such that the tool housing extends in the direction over the locking element, so that the locking element is secured by the tool housing against release from the locking position. As a result, sliding the tool housing over the mandrel holder can be used to simultaneously lock the locking element in the locking position. A separate actuation step by a user is thus eliminated. Sliding the tool housing over the mandrel holder is a step that must be carried out when assembling the tool housing on the riveting tool.In order to secure the locking element against loosening from the locking position by sliding the tool housing onto the mandrel holder, the locking element should have a longitudinal extension in the radial direction with respect to the axis of rotation which is greater than the radial distance between the circumference of the threaded hole and the outer circumference of the connecting part provided with the threaded hole in the area of the through hole.
[0025] If the spring ring described above acts on the locking element and is arranged in particular between the pushed-on tool housing and the locking element, the longitudinal extension resulting from the locking element and in particular the spring element in the radial direction with respect to the axis of rotation should be greater than the radial distance between the circumference of the threaded hole and the outer circumference of the connecting part provided with the threaded hole in the region of the through hole.
[0026] A simple manufacture of the locking element and in particular of the locking mechanism effected thereby is facilitated if the locking element is cylindrical in shape with its central axis extending radially to the axis of rotation.
[0027] In a further embodiment, the riveting tool is designed as a hand-held riveting tool and comprises a handle, which, for example, has a longitudinal extension transverse to the effective axis. For example, the handle is formed on the tool housing, in particular, integrally formed thereon. The handle allows the riveting tool to be held in the hand or guided manually. In particular, the handle enables the riveting tool to be manually applied to the location to be riveted.
[0028] Further advances are fundamentally achieved in a method for assembling a riveting tool, in particular the riveting tool described above, the method comprising steps of i) connecting the mandrel holder and the drive element of the riveting device by creating a screw connection; ii) rotating the mandrel holder and the drive element relative to one another about the axis of rotation until a desired rotational position of the mandrel holder relative to the drive element is reached and the locking element engages in a locking position in which the mandrel holder is locked relative to the drive element against rotation about the axis of rotation.
[0029] This improves handling for the user when mounting the mandrel holder on the drive element and locking the mandrel holder at a desired axial distance from the drive element. This requires only the rotational movement, which is performed anyway during the assembly process when establishing the screw connection. A separate actuation movement by the user to actuate the locking element is not required.
[0030] A further advance is achieved by further developing the method in which step ii) comprises sub-steps for
[0031] 11 . 1 ) Rotating the mandrel holder and the drive element relative to each other about the axis of rotation until an axial stop;
[0032] 11 . 2 ) Rotate the mandrel holder and the drive element relative to each other about the axis of rotation away from the axial stop until a desired rotational position of the mandrel holder relative to the drive element is reached and the locking element reaches a locking position in which the mandrel holder is locked relative to the drive element against rotation about the axis of rotation.
[0033] This procedure aims to further simplify and facilitate the adjustment of the axial distance between the mandrel holder and the drive element for the user.
[0034] A further development of the method results in a further development in which, after carrying out step ii) or sub-steps ii.1) and ii.2), a step is included for iii) pushing the tool housing over the locking element in order to secure the locking element against being released from the locking position. In this way, the assembly of the tool housing on the riveting device or the support structure is used to achieve a final locking of the mandrel holder. The user does not need to carry out a separate actuating movement or locking movement for this final locking.
[0035] According to one aspect, a mandrel holder for the riveting tool described above is proposed. The mandrel holder comprises a cylindrical base body with a section for receiving a rivet mandrel or threaded rivet mandrel and with a threaded bore for establishing a screw connection with the drive element of the riveting tool.
[0036] In the proposed mandrel holder, the base body has a through-hole that extends radially outward from the threaded bore and is configured to accommodate a locking element that can be moved toward the threaded bore. For example, the mandrel holder comprises a locking element that is accommodated in the through-hole. As a result, the mandrel holder is suitable for mounting on the riveting tool described above and for achieving the advantages described above.
[0037] According to a further aspect, a blind rivet setting tool is proposed. The blind rivet setting tool comprises the riveting tool described above and has a rivet mandrel of a blind rivet to be set, which is accommodated in its mandrel holder.
[0038] According to a further aspect, a blind rivet nut setting tool is proposed. The blind rivet nut setting tool comprises the riveting tool described above and has a threaded rivet mandrel accommodated in its mandrel holder for a blind rivet nut to be set.
[0039] According to a further aspect, a blind rivet screw setting tool is proposed. The blind rivet screw setting tool comprises the riveting tool described above and has a threaded rivet mandrel for a blind rivet screw to be set, which is accommodated in its mandrel holder.
[0040] Further details and features will become apparent from the following description of several embodiments with reference to the drawings. Fig. 1 shows an exemplary embodiment of a riveting device with a riveting tool and a drive device for actuating the riveting tool in a schematic sectional view.
[0041] Fig. 2 shows the exemplary riveting device in an enlarged section of Figure 1 in the area of a tool housing with a mandrel holder accommodated therein and a locking element for the mandrel holder in a locking position,
[0042] Fig. 3 shows the exemplary riveting device in a sectional view along the section line XX of Figure 2,
[0043] Fig. 4 shows the exemplary riveting device in the representation according to Figure 2 with the tool housing dismantled, with the locking element in an unlocking position,
[0044] Fig. 5 shows the exemplary riveting device in a sectional view along the section line XX of Figure 4,
[0045] Fig. 6 shows the exemplary riveting tool in the representation according to Figure 2 with the tool housing dismantled, with the locking element in the locking position,
[0046] Fig. 7 shows the exemplary riveting device in a sectional view along the section line XX of Figure 6,
[0047] Fig. 8 shows a possible embodiment of a blind rivet setting tool with the exemplary riveting tool of Figure 1 in a schematic partial representation,
[0048] Fig. 9 shows a possible embodiment of a blind rivet nut setting tool with the exemplary riveting tool of Figure 1 in a schematic partial representation, and
[0049] Fig. 10 shows a possible embodiment of a blind rivet screw setting tool with the exemplary riveting tool of Figure 1 in a schematic partial representation.
[0050] Figure 1 shows the structure of an exemplary embodiment of a riveting tool 1, which is also referred to in specialist circles as a setting tool. The exemplary riveting tool 1 is suitable for attaching or setting rivets using the blind riveting method and is therefore designed for use with blind rivets.
[0051] The exemplary riveting device 1 comprises a riveting tool 10 and a drive device 30 for actuating the riveting tool 10. The riveting tool 10 is preferably assigned to a tool housing 4. The drive device 30 is preferably assigned to a device housing 5, in particular accommodated therein. The tool housing 4 is preferably a metal housing. The device housing 5 is preferably a plastic housing.
[0052] The exemplary riveting tool 1 can be a hand-held riveting tool. The hand-held riveting tool 1 has, for example, a gripping surface 2.1, which can be at least partially formed on the tool housing 5. For example, the hand-held riveting tool 1 has a handle part 2, which is at least partially formed by the tool housing 5. The gripping surface 2.1 or the handle part 2 enables the riveting tool 1 to be held in the hand when it is applied to a workpiece to set a rivet, in particular a blind rivet. The riveting process as such then takes place by actuating the riveting tool 10 via the drive device 30.
[0053] For example, the drive device 30 is an electromechanical drive device. The electromechanical drive device 30 comprises, for example, an electric motor 31 with a rotatable output shaft 31.1 and preferably a spindle gear 32 which can be driven by the electric motor 31. The spindle gear 32 is preferably designed to convert a rotary drive movement emanating from the output shaft 31.1 into a translatory drive movement acting along an effective axis W for actuating the riveting tool 10. The spindle gear 32 can be a ball screw drive.
[0054] In the exemplary riveting device 1, for example, at least one, preferably two reduction stages 37, 37' are interposed between the electric motor 31 and the spindle gear 32. For example, the reduction stages 37, 37' are connected one after the other in the power flow. For example, the reduction stages 37, 37' use a common intermediate shaft 38. For example, at least one of the reduction stages 37, 37' is a spur gear stage, and the associated gear elements are spur gears.
[0055] To supply electrical energy to the drive device 30, a preferably replaceable electrical energy storage device, such as a rechargeable battery 3, can be provided, which is arranged, for example, in the region of an end of the handle part 2 facing away from the riveting tool 10. In this respect, the riveting tool 1 can be a battery-powered device.
[0056] The riveting tool 10 can comprise a mouthpiece 11 and a mandrel holder 12 movable relative to the mouthpiece 11 in the direction of the effective axis W. For example, the mandrel holder 12 has a chuck housing 13 and at least one, preferably several, clamping elements 14, 14', in particular clamping jaws, movable in the chuck housing 13 along a clamping path. Preferably, the mouthpiece 11 and / or the mandrel holder 12 and / or the chuck housing 13 and / or the clamping elements 14, 14' are a metal part.
[0057] The mouthpiece 11 serves, for example, to receive a rivet (not shown in Figure 1) to be set, in particular a blind rivet, and preferably has a through-hole 11.1 for inserting the rivet mandrel of the rivet therein. The mandrel receptacle 12 serves, for example, to fix the rivet mandrel so that a displacement-proof connection is created between the received rivet mandrel and the mandrel receptacle 12. This can be done, for example, via the chuck housing 13 with the clamping elements 14, 14' arranged movably therein, by means of which the rivet mandrel is fixed, in particular clamped, in the chuck housing 13.
[0058] The drive device 30 can actuate the riveting tool 10 in such a way that the mandrel holder 12 or the chuck housing 13 with the rivet mandrel fixed therein is moved away from the mouthpiece 11 in the direction of the effective axis W. This occurs, for example, in that the drive device 30 pulls the mandrel holder 12 or the chuck housing 13 away from the mouthpiece 11. This known mode of operation and the blind riveting that can be carried out with it are described in more detail in the document EP 0 116 954 A2, to which reference is hereby made for the purpose of completing and supplementing the present disclosure with the note that the document may assign a meaning to identical terms which differs from the present meaning.
[0059] Preferably, the mouthpiece 11 is fastened to the tool housing 4, for example, screwed thereto. Preferably, the mandrel receptacle 12, in particular the chuck housing 13, is accommodated in the tool housing 4 so as to be movable in the direction of the effective axis W. For example, the tool housing 4 has an elongated, in particular tubular, base body. In this respect, the tool housing 4 is also referred to in specialist circles as a setting sleeve. For example, the mouthpiece 11 is fastened to one end of the tool housing 4 and the opposite end faces the device housing 5.
[0060] The spindle gear 32 is preferably arranged in the device housing 5. The spindle gear 32 preferably comprises a threaded spindle 33 with a movement thread and a spindle nut 34 which engages or can be brought into engagement therewith. The threaded spindle 33 preferably has a front end 33.1 facing the mandrel holder 12, in particular the chuck housing 13, and an opposite rear end 33.2. The threaded spindle 33 and the spindle nut 34 are preferably arranged concentrically to one another with respect to a gear axis. The spindle axis of the threaded spindle 33 preferably lies on the gear axis. The output shaft 31.1 of the electric motor 31 is preferably arranged axially parallel to the gear axis. The gear axis or the spindle axis preferably lies on the effective axis W.
[0061] For example, the threaded spindle 33 and the spindle nut 34 are configured such that the spindle nut 34 is the gear element driven or drivable by the electric motor 31, and the threaded spindle 33 is used to carry out the translational drive movement in order to actuate the riveting tool 10. For example, for this purpose the threaded spindle 33 is connected at its front end 33.1 directly or indirectly, for example via an intermediate piece, to the mandrel holder 12 or the chuck housing 13 in a displacement-proof manner. For example, the spindle nut 34 is furthermore rotatably mounted in the device housing 5 in the radial direction with respect to the gear axis or the effective axis W via at least one, preferably two radial bearings 35, 35'. In the exemplary riveting tool 1, for example, a torque support 41 is provided to secure the threaded spindle 33 against rotation relative to the device housing 5.For example, the torque arm 41 is arranged on the threaded spindle 33, in particular fastened thereto or connected thereto in a rotationally fixed manner. For example, the torque arm 41 is supported, preferably via at least one sliding body or rolling body, against an abutment 43 in order to form the anti-twist device for the threaded spindle 33. The abutment 43 itself can be arranged in a rotationally fixed or anti-twist manner relative to the device housing 5. For example, the abutment 43 has at least one guide track on which the torque arm 41 is guided while maintaining the anti-twist device when the threaded spindle 33 executes a translational movement along the effective axis W.
[0062] In the exemplary riveting tool 1, for example, a spring element 15 is provided, which acts with a force, for example via a pressing part 16, into the mandrel receptacle 12. For example, the spring element 15 is arranged in the threaded spindle 33. For example, the threaded spindle 33 and / or the torque support 41 serve as a counterholder for the spring element 15.
[0063] The force of the spring element 15 can be used as a preload force, by which the fixation of the rivet mandrel in the mandrel holder 12 is effected or at least supported. For example, the spring element 15 is provided in order to apply a spring force to the clamping elements 14, 14' into the chuck housing 13. As a result, the clamping elements 14, 14' are pressed into the clamping position against a rivet mandrel, for example a blind rivet, which is inserted into the chuck housing 13 via the through-hole 11. 1 of the mouthpiece 11. For example, the spring element 15 is a compression spring.
[0064] The threaded spindle 33 is preferably designed as a hollow spindle with a passage 40 running in the direction of its longitudinal extent. The passage 40 makes it possible to remove any residue of a rivet mandrel remaining from a riveting process from the riveting tool 10. For example, in this case the pressing part 16 arranged at the front end 33.1 of the threaded spindle 33 is received in the passage 40 and is itself designed as a hollow body with a passage 16.1. For example, the passage 40 opens at the rear end 33.2 of the threaded spindle 33 in a tubular element 60, which in turn opens into a collecting container 70. For example, a mandrel disposal path is realized in this way via the threaded spindle 33, wherein the collecting container 70 can serve as a collector for mandrel residues.Preferably, the collecting container 70 is arranged fixedly with respect to the device housing 5, in particular arranged detachably, for example fastened to the device housing 5, in particular detachably fastened.
[0065] For example, the torque support 41 is also designed as a hollow body with a passage, which is, for example, a component of the mandrel disposal path to the collecting container 67. For example, the torque support 41 engages in the passage 40 of the threaded spindle 33, and the tubular element 60 engages in the passage of the torque support 41.
[0066] In the exemplary riveting tool 1, for example, a support structure 39 is provided, on which, axially with respect to the effective axis W, the tool housing 4 and, on the other hand, an axial bearing 36, preferably designed as a thrust bearing, are supported, which in turn is axially supported on the spindle nut 34. The mouthpiece 11 is thus mounted via the tool housing 4 and the support structure 39 on the axial bearing 36, which in turn is supported on the spindle nut 34. In this way, a load path for the setting force occurring during a riveting process is formed, bypassing or largely bypassing the tool housing 5.
[0067] Figure 2 shows the exemplary riveting tool 1 in the area of the tool housing 4 in an enlarged section of Figure 1. For the sake of clarity, the illustration in Figure 2 has been simplified compared to the illustration in Figure 1 by omitting components and further schematization. Furthermore, in Figure 2 the threaded spindle 33 of Figure 1 is generalized and is referred to generally below as drive element A. This is against the background that the drive element A can in principle also be a reciprocating piston or another drive element that drives the mandrel holder. The reciprocating piston can be used instead of the threaded spindle 33. Alternatively, the reciprocating piston can be pneumatically driven. For example, the reciprocating piston is used in a riveting tool with a pneumatic drive device.As can be seen in particular from Figure 2, the drive element A is connected to the mandrel holder 12 via a screw connection 20. The screw connection 20 is formed by rotating the mandrel holder 12 and the drive element A relative to one another about an axis of rotation D. For example, the axis of rotation D lies on the effective axis W.
[0068] The screw connection 20 preferably comprises two connecting parts 21, 22 which have threads and can be rotated relative to one another about the rotation axis D. For example, one of the connecting parts 21, 22 is assigned to the mandrel receptacle 12 and the other connecting part 22 is assigned to the drive element A. For example, one connecting part 21 is formed on the mandrel receptacle 12, in particular molded thereon. For example, the other connecting part 22 is formed on the drive element A, in particular molded thereon.
[0069] For example, the thread of one of the connecting parts 21, 22, in particular the thread of the connecting part 21 associated with the mandrel holder 12, is formed in a threaded bore 23. For example, the threaded bore 23 is located in the center with respect to the rotational axis D and / or coaxial with the rotational axis D. For example, the thread of the other connecting part 22 is formed as an external thread.
[0070] To prevent the screw connection 20 from loosening and / or to permanently hold the connecting parts 21, 22 in a desired rotational position relative to one another and thus to permanently maintain the mandrel holder 12 and the drive element A at a desired axial distance, a locking element 50, for example, is provided. In Figure 2, the locking element 50 is in a locking position V, in which the mandrel holder 12 is mechanically locked in a rotational position relative to the drive element A against rotation about the rotation axis D.
[0071] In the exemplary riveting device 1, the riveting tool 10 is configured, for example, such that the locking element 50 reaches the locking position V by a movement executed radially with respect to the rotational axis D. This favors a compact design of the riveting device 1 in the axial direction, since the locking movement of the locking element 50, which requires installation space, is executed in the radial direction with respect to the rotational axis D and not in the axial direction. In order to enable locking in this way, for example, a through hole 24 is provided in the connecting part 21 assigned to the mandrel holder 12. For example, the through hole 24 opens with one end into the threaded bore 23. For example, the through hole 24 runs from the threaded bore
[0072] 23 radially outwards . For example, in the axial direction with respect to the rotation axis D, the through hole 24 opens outside the screw connection 20 into the threaded bore 23 . In the through hole
[0073] 24, for example, the locking element 50 is accommodated so as to be radially movable relative to the rotational axis D. With regard to the other connecting part 22, a recess 25 is provided on the circumference, for example, into which the locking element 50 engages in a locking manner.
[0074] To illustrate the radial structure of the riveting tool 10 in the area of the locking element 50, Figure 3 shows the exemplary riveting device 1 in a sectional view along the section line XX of Figure 2. As can be seen in particular from Figure 3, the connecting part 21 provided with the recess 25 can have at least one, preferably several further recesses 25', 25'' on the circumference, into which the locking element 50 can be introduced. By means of the several recesses 25, 25', 25'', the axial distance of the mandrel holder 12 relative to the drive element A can be set in small steps to a desired value, wherein in the respectively set value there is then a locking by the locking element 50 in the respective rotational position.
[0075] Preferably, the at least one recess 25 or 25' or 25'' and / or the locking element 50 has a run-out contour 26 or 26' in the circumferential direction with respect to at least one of the connecting parts 21, 22 (Figures 3 and 5), so that the locking element 50 is pressed radially outwards from the recess 25 via the run-out contour 26 or 26' when a predetermined rotating force is exerted on the screw connection 20, for example by a user. The run-out contour 26 or 26' enables the locking element 50 to be unlocked using a rotating force exerted on the screw connection 20, which is applied anyway when the screw connection 20 is rotated in order to mount the mandrel holder 12 on the drive element A. A separate or different unlocking movement for unlocking the locking element 50 is thus eliminated.
[0076] In the exemplary riveting tool 1, the connecting part 21 assigned to the mandrel holder 12 is surrounded, for example, by a spring ring 51. Preferably, the spring ring 51 acts in a spring-elastic manner radially with respect to the rotational axis D. For example, the spring ring 51 is an O-ring. Preferably, the spring ring 51 is operatively connected in the radial direction to the locking element 50. For example, the locking element 50 has a recess 53 or another depression in its one axial end face, into which the spring ring 56 engages. For example, a circumferential groove
[0077] 21 . 1, into which the spring ring 51 is received. In this respect, the spring ring 51 can serve as a sealing ring, which seals the mandrel holder 12 against the tool housing 4. Furthermore, the spring ring 51 enables the locking element 50 to be secured against falling out of the through-hole 24.
[0078] Due to the spring action of the spring ring 41, the user is given the tactile perception of a ratchet effect during a rotational movement of the mandrel holder 12 relative to the drive element A about the rotational axis D. As a result, the user senses, in the respective rotational position of the mandrel holder 12 relative to the drive element A, when the locking element 50 has reached a locking position V. In this way, the user can adjust the axial distance of the mandrel holder 12 relative to the drive element A relatively precisely in small steps.
[0079] In the exemplary riveting device 1, the locking element 50 is, for example, cylindrical in shape and its central axis extends radially to the rotation axis D. For example, the locking element 50 has a contact surface 52 extending transversely to its central axis, which is located against a shoulder
[0080] 24 . 1 is supported in the through hole 24 when the locking element 50 is in the locking position V. The locking element 50 is thereby secured against falling through into the threaded bore 23, for example when the mandrel holder 12 is dismantled from the riveting tool 1. A possible procedure for assembling the mandrel holder 12 and the tool housing 4 is described below using as an example with reference to Figures 4 to 7. Figure 4 shows the exemplary riveting tool 1 with the tool housing 4 dismantled, the locking element 50 being in an unlocking position E. Figure 5 shows the exemplary riveting tool 1 in a sectional view along the section line XX of Figure 4. Figure 6 shows the exemplary riveting device 1 with the tool housing 4 removed, wherein the locking element 50 is in the locking position V.Figure 7 shows the exemplary riveting device 1 in a sectional view along the section line XX of Figure 6 .
[0081] The riveting tool 10 is mounted on the drive device 30 of the exemplary riveting device, for example, in such a way that, in a first step, the mandrel holder 12 and the drive element A are connected to one another by creating the screw connection 20. In this case, the mandrel holder 12 and the drive element A are rotated relative to one another about the axis of rotation D up to an axial stop 27. This state is shown in Figures 4 and 5. When the axial stop 27 is reached, the locking element 50 is in an unlocking position E. The axial stop 27 can be formed by a shoulder in the drive element A, against which the connecting part 21 provided with the threaded bore 23 strikes when the connecting part 21 is completely screwed onto the other connecting part 22.
[0082] In the unlocking position E, the locking element 50 is in a radially extended position, in which the locking element 50 is disengaged from the at least one recess 25 or 25' or 25'' of the connecting part 22 assigned to the drive element A. In the unlocking position E, the spring ring 51 applies a radial force in the inward direction to the locking element 50.
[0083] In a further step, the mandrel holder 12 is now rotated relative to the drive element A about the rotational axis D away from the axial stop 27 until a desired rotational position of the mandrel holder 12 relative to the drive element A is reached and preferably the locking element 50 reaches the locking position V in one of the recesses 25, 25', 25''. In this rotational position, the mandrel holder 12 is then locked relative to the drive element 50 against rotation about the rotational axis D. This state is shown in Figures 6 and 7.
[0084] The tool housing 4 is then preferably pushed on at least over the locking element 50. This pushing on takes place during the assembly of the tool housing 4 onto the riveting device 1. By pushing on the tool housing, the locking element 50 is simultaneously secured against loosening from the locking position V. This state is shown in Figures 2 and 3. In order to achieve this securing, the locking element 50 preferably has a longitudinal extent in the radial direction with respect to the axis of rotation D which is greater than the radial distance S between the circumference of the threaded bore 23 and the outer circumference of the connecting part 21 provided with the threaded bore 23 in the region of the through hole 24.
[0085] The proposed riveting device 1 enables a tool-free changing of the mandrel holder 12 and the tool housing 4, whereby a locking of the mandrel holder 12 relative to the drive element A against rotation about the rotation axis D is possible, which is optimized in its axial space requirement.
[0086] Figure 8 shows an example of a possible embodiment of a blind rivet setting tool 100. The blind rivet setting tool 100 has the structure of the exemplary riveting tool 1 described above, wherein for the sake of simplicity, only a section of the exemplary riveting tool 1 in the region of the riveting tool 10 is shown in Figure 8. In the blind rivet setting tool 100, a rivet mandrel 120 of a blind rivet 110 is inserted into the mouthpiece 11 and received in the mandrel receptacle 12, in particular the chuck housing 13, and fixed in the axial direction, for example by the at least one clamping element 14 or 14'. Figure 8 shows the blind rivet 110 in the state before riveting, in which the rivet body 130 of the blind rivet 110 is still in its initial state.
[0087] Figure 9 shows an example of a possible embodiment of a blind rivet nut setting tool 200. The blind rivet nut setting tool 200 has the structure of the exemplary riveting tool 1 described above, wherein the mandrel holder 12 and the pressing part 16 are modified with regard to a rivet mandrel for a blind rivet nut and the rivet mandrel is a threaded rivet mandrel. For example, the pressing part 16 there has a function with regard to spindles of the threaded rivet mandrel into the blind rivet nut. For the sake of simplicity, Figure 9 only shows a section of the riveting tool 1 in the area of the riveting tool 10. In the blind rivet nut setting tool 200, a threaded rivet mandrel 220 for a blind rivet nut 210 is received in the mandrel holder 12. Figure 9 shows the blind rivet nut 210 in the state before riveting, in which the rivet body 230 of the blind rivet nut 210 is still in its initial state.
[0088] For example, in the exemplary blind rivet nut setting tool 200, the pressing part 16 is inserted into a receptacle of the threaded rivet mandrel 220 and forms a positive, rotationally fixed connection with the threaded rivet mandrel 220 via the receptacle. For example, the force of the spring element 15 of the riveting tool 1 (Figure 1), which acts axially on the pressing part 16, holds the pressing part 16 in the receptacle of the threaded rivet mandrel 220.
[0089] Figure 10 shows an example of a possible embodiment of a blind rivet screw setting tool 300. The blind rivet screw setting tool 300 has the structure of the exemplary riveting tool 1 described above, wherein the mandrel holder 12 and the pressing part 16 are modified with regard to a rivet mandrel of a blind rivet screw and the rivet mandrel is a threaded rivet mandrel. For example, the pressing part 16 there has a function with regard to spindles of the threaded rivet mandrel into a screw-in part of the mandrel holder 12. For the sake of simplicity, Figure 10 only shows a section of the riveting tool 1 in the area of the riveting tool 10. In the blind rivet screw setting tool 300, a threaded rivet mandrel 320 of a blind rivet screw 310 is received in the mandrel holder 12 via the screw-in part. Figure 10 shows the blind rivet screw 310 in the state before riveting, in which the rivet body 330 of the blind rivet screw 310 is still in its initial state.
[0090] For example, in the exemplary blind rivet screw setting tool 300, the pressing part 16 acts on the screw-in part, in particular the pressing part 16 is introduced into a receptacle of the screw-in part and forms a positive, rotationally fixed connection with the screw-in part via the receptacle. For example, the force of the spring element 15 of the riveting tool 1 (Figure 1), which acts axially on the pressing part 16, holds the pressing part 16 in the receptacle of the screw-in part. As can be seen in particular from Figures 8 to 10, the mandrel receptacle 12 can have a cylindrical base body 12.1, which for example has a section 12.2 for receiving a rivet mandrel 120 or threaded rivet mandrel 220 or 320 and the threaded bore 23 described above for establishing the screw connection 20 with the drive element A of the riveting tool 1. The base body 12.1 may further comprise the above-described through-hole 24, which extends radially outward from the threaded bore 23 and is configured to accommodate the locking element 50 so that it can move in the direction of the threaded bore 23. The above-described spring ring 51 may be wound around the base body 12 . 1 in the region of the locking element 50.
[0091] List of reference symbols
[0092] 1 riveting tool
[0093] 2 handle part
[0094] 2.1 Grip surface
[0095] 3 accumulator
[0096] 4 tool housings
[0097] 4.1 Flange
[0098] 5 device housing
[0099] 6 Support structure
[0100] 10 riveting tools
[0101] 11 Mouthpiece
[0102] 11.1 Through hole
[0103] 12 mandrel holder
[0104] 12.1 Basic body
[0105] Section 12.2
[0106] 13 Feed housing
[0107] 14, 14 ' clamping element
[0108] 15 spring element
[0109] 16 Press part
[0110] 16.1 Passage
[0111] 20 screw connection
[0112] 21 Connecting part
[0113] 21.1 Groove
[0114] 22 connecting part
[0115] 23 threaded hole
[0116] 24 through holes
[0117] 24.1 paragraph
[0118] 25 Deepening
[0119] 25 ', 25 '' recess
[0120] 26, 26' run-out contour
[0121] 27 axial stop
[0122] 30 Drive device
[0123] 31 electric motor
[0124] 31.1 Output shaft
[0125] 32 spindle gears
[0126] 33 threaded spindle
[0127] 33.1 front end
[0128] 33.2 rear end 34 spindle nut
[0129] 35 , 35 ' radial bearing
[0130] 36 thrust bearings
[0131] 37 , 37 ' reduction stage
[0132] 38 Intermediate shaft
[0133] 39 Support structure
[0134] 40 passage
[0135] 41 Torque support
[0136] 43 abutments
[0137] 50 Locking is learned
[0138] 51 spring ring
[0139] 52 plant area
[0140] 53 Recess
[0141] 60 pipe element
[0142] 70 collecting containers
[0143] 100 blind rivet setting device
[0144] 110 blind rivet
[0145] 120 rivet mandrel
[0146] 130 rivet bodies
[0147] 200 blind rivet nut setting device
[0148] 210 blind rivet nut
[0149] 220 thread rivet mandrel
[0150] 230 rivet bodies
[0151] 300 blind rivet screw setting tool
[0152] 310 blind rivet screw
[0153] 320 thread rivet mandrel
[0154] 330 rivet bodies
[0155] A drive element
[0156] S radial distance
[0157] W effective axis
[0158] D axis of rotation
[0159] V locking position
[0160] E Unlocking position
Claims
P a t e n t a n s p r ü c h e 1. Riveting device (1), comprising a riveting tool (10) with a mouthpiece (11) and a mandrel holder (12) movable relative to the mouthpiece (11) along an effective axis (W), a drive device (30) for actuating the riveting tool (10) with a drive element (A) which is designed to be moved along the effective axis (W) in order to drive the mandrel holder (12), wherein the drive element (A) is connected directly or indirectly to the mandrel holder (12) via a screw connection (20) and the screw connection (20) is formed by rotating the mandrel holder (12) and the drive element (A) relative to one another about an axis of rotation (D), a locking element (50) which is in a locking position (V) in which the mandrel holder (12) is mechanically locked relative to the drive element (A) in a rotational position against rotation about the axis of rotation (D), characterized inthat the locking element (50) has reached the locking position (V) by a movement carried out radially with respect to the axis of rotation (D).
2. Riveting tool according to claim 1, the screw connection (20) comprising two threaded connecting parts (21, 22) which can be rotated relative to one another about the rotation axis (D), of which one connecting part (21) is assigned to the mandrel holder (12) and the other connecting part (22) is assigned to the drive element (A), wherein the thread of one of the connecting parts (21, 22) is formed in a threaded bore (23) and, extending radially therefrom, one connecting part (21) has a through hole (24) in which the locking element (50) is received so as to be radially movable with respect to the rotation axis (D), and wherein the other connecting part (22) has a recess (25) on its circumference into which the locking element (50) engages in a locking manner.
3. Riveting tool according to claim 2, wherein the locking element (50) has a longitudinal extension in the radial direction with respect to the axis of rotation (D) which is greater than the radial distance (S) between the circumference of the threaded bore (23) and the outer circumference of the connecting part (21) provided with the threaded bore (23) in the region of the through hole (24).
4. Riveting tool according to claim 2 or 3, wherein the recess (25) and / or the locking element (50) has a run-out contour (26; 26') in the circumferential direction with respect to at least one of the connecting parts (21, 22).
5. Riveting tool according to one of claims 2 to 4, wherein the connecting part (21) provided with the recess (25) has at least one, preferably several further recesses (25 ', 25 '') on the circumference, into which the locking element (50) can be introduced.
6. Riveting tool according to one of the preceding claims, wherein the locking element (50) engages in a contour of the drive element (A) in the locking position (V) and is disengaged therefrom in an unlocking position (E).
7. Riveting tool according to one of the preceding claims, wherein the locking element (50) is arranged outside the screw connection (20) in the axial direction with respect to the axis of rotation (D).
8. Riveting tool according to one of the preceding claims, comprising a spring ring (51) which surrounds the axis of rotation (D), is spring-elastic radially with respect to the axis of rotation (D) and is operatively connected to the locking element (50) in the radial direction, so that in an unlocking position (E) of the locking element (50), in which the locking element (50) is in a radially extended position, the spring ring (51) applies a radial force to the locking element (50).
9. Riveting tool according to claim 8, wherein the spring ring (51) is a sealing ring which serves to seal the mandrel holder (12) relative to a tool housing (4) in which the mandrel holder (12) is movably received along the effective axis (W).
10. Riveting tool according to one of the preceding claims, comprising a tool housing (4) which accommodates the mandrel holder (12) movably along the effective axis (W) and extends in the direction of the effective axis (W) over the locking element (50), so that the locking element (50) is secured against release from the locking position (V) via the tool housing (4).
11. Riveting tool according to one of the preceding claims, wherein the locking element (50) is cylindrical, the central axis of which is radial to the axis of rotation (D).
12. A method for assembling a riveting tool according to one of claims 1 to 11, comprising steps of i) connecting the mandrel holder (12) and the drive element (A) by creating a screw connection (20); ii) rotating the mandrel holder (12) and the drive element (A) relative to one another about the axis of rotation (D) until a desired rotational position of the mandrel holder (12) relative to the drive element (A) is reached and the locking element (50) engages in a locking position (V) in which the mandrel holder (12) is locked relative to the drive element (50) against rotation about the axis of rotation (D).
13. The method according to claim 12, step ii) comprising sub-steps for ii.l) rotating the mandrel holder (12) and the drive element (A) relative to one another about the axis of rotation (D) up to an axial stop (27); ii.2) rotating the mandrel holder (12) and the drive element (A) relative to one another about the axis of rotation (D) away from the axial stop (27) until a desired rotational position of the mandrel holder (12) relative to the drive element (A) is reached and the locking element (50) reaches a locking position (V) in which the mandrel holder (12) is locked relative to the drive element (50) against rotation about the axis of rotation (D).
14. The method according to claim 12 or 13, wherein the riveting tool (1) to be assembled is designed according to claim 9 and the method after step ii) comprises a step of iii) sliding the tool housing (4) over the locking element (50) in order to secure the locking element (50) against release from the locking position (V).
15. Mandrel holder (12) for a riveting tool (1) according to one of claims 1 to 11, comprising a cylindrical base body (12.1) with a section (12.2) for receiving a rivet mandrel (120) or threaded rivet mandrel (220; 320) and with a threaded bore (23) for producing a screw connection (20) with the drive element (A) of the riveting tool (1), wherein the base body (12.1) has a through hole (24) which runs radially outwards from the threaded bore (23) and is designed to receive a locking element (50) so as to be movable in the direction of the threaded bore (23).
16. Mandrel receptacle according to claim 15, comprising a locking element (50) which is received in the through hole (23).
17. Blind rivet setting tool (100), comprising a riveting tool (1) according to one of claims 1 to 11 with a rivet mandrel (120) of a blind rivet (110) to be set, which is received in the mandrel holder (12) of the riveting tool (1).
18. Blind rivet nut setting tool (200), comprising a riveting tool (1) according to one of claims 1 to 11 with a threaded rivet mandrel (220) accommodated in the mandrel receptacle (12) of the riveting tool (1) for a blind rivet nut (210) to be set.
19. Blind rivet screw setting tool (300), comprising a riveting tool (1) according to one of claims 1 to 11 with a threaded rivet mandrel (320) of a blind rivet screw (310) to be set, which is received in the mandrel receptacle (12) of the riveting tool (1).