Riveting device comprising a spring element of an integrated threaded spindle
12337375 · 2025-06-24
Assignee
Inventors
Cpc classification
B21J15/26
PERFORMING OPERATIONS; TRANSPORTING
International classification
B21J15/04
PERFORMING OPERATIONS; TRANSPORTING
B21J15/26
PERFORMING OPERATIONS; TRANSPORTING
Abstract
A riveting device has a riveting tool actuated by a drive. A mandrel holder can be moved relative to a mouthpiece along an operative axis. A spring element exerts a force into the mandrel holder. The drive has a threaded spindle with a front end facing towards the mandrel holder and an opposing back end. The spindle has a through hole which extends in the direction of its longitudinal extension. A back longitudinal section extends up to the back end of the threaded spindle. A front longitudinal section present before the back longitudinal section. A fixing structure created by a material recess non-displaceably connects the threaded spindle to the mandrel holder. The front longitudinal section of the through hole has a cross-sectional surface area which is smaller than the cross-sectional surface area of the back longitudinal section. The spring element is arranged in the back longitudinal section.
Claims
1. A riveting device (1), comprising: a riveting tool (10), having a mouthpiece (11), a mandrel holder (12) that can be moved relative to the mouthpiece (11) along an operative axis (W), and a spring element (15) which exerts a force into the mandrel holder (12); and a drive device (30) for actuating the riveting tool (10) with a threaded spindle (33) having a feed thread (33.3), wherein the threaded spindle (33) receives the spring element (15), wherein the threaded spindle (33) is operatively connected to the mandrel holder (12) and configured to be moved along the operative axis (W), wherein the threaded spindle (33) has a front end (33.1) facing towards the mandrel holder (12) and an opposing back end (33.2), wherein the threaded spindle (33) is formed as a hollow spindle having a through hole (40), wherein the through hole (40) extends in a direction of a longitudinal extension of the threaded spindle (33), wherein the through hole (40) has a back longitudinal section (40.2) extending up to the opposing back end (33.2) of the threaded spindle (33) and a front longitudinal section (40.1) present in front of the back longitudinal section, wherein the threaded spindle (33) has a fixing structure (33.4) created by a material recess in a region of the front end (33.1), wherein the fixing structure (33.4) connects the threaded spindle (33) directly or indirectly to the mandrel holder (12), wherein the front longitudinal section (40.1) of the through hole (40) has a cross-sectional surface area which is smaller than a cross-sectional surface area of the back longitudinal section (40.2), wherein the spring element (15) is arranged in the back longitudinal section (40.2); wherein the front longitudinal section (40.1) of the through hole (40) and the feed thread (33.3) of the threaded spindle (33) overlap each other in an overlapping section (41).
2. The riveting device according to claim 1, wherein the spring element (15) is supported in a region of the back longitudinal section (40.2) in a direction of the operative axis (W) on the threaded spindle (33) directly or via a counter holder (17).
3. The riveting device according to claim 1, wherein the front longitudinal section (40.1) of the through hole (40) extends to the front end (33.1) of the threaded spindle (33).
4. The riveting device according to claim 1, wherein the fixing structure (33.4) of the threaded spindle (33) comprises an external thread or is an external thread.
5. The riveting device according to claim 1, wherein the threaded spindle (33) is engaged into a spindle nut (34) of a spindle gear (32) and in an initial state, present before actuating the riveting tool (10), the spring element (15) is arranged axially in the threaded spindle (33) in such a way that the spindle nut (34) and the spring element (15) overlap or an end of the spindle nut (34) facing towards the riveting tool (10) is in front of an end of the spring element (15) facing towards the riveting tool (10).
6. The riveting device according to claim 1, wherein a pressure part (16) is received displaceably in the front longitudinal section (40.1) of the through hole (40) for transmitting the force of the spring element (15), wherein the pressure part (16) is formed as a hollow body having a through hole (16.1) extending in a direction of a longitudinal extension of the pressure part, a diameter of the through hole of the hollow body is greater than a diameter of a rivet mandrel that can be used by the riveting tool (10).
7. The riveting device according to claim 1, wherein the spring element (15) has a through hole (15.1) extending in a direction of a longitudinal axis of the threaded spindle (33), wherein a diameter of the through hole (15.1) of the spring element (15) is greater than a diameter of a rivet mandrel that can be used by the riveting tool (10).
8. The riveting device according to claim 1, wherein the spring element (15) is a compression spring.
9. The riveting device according to claim 1, wherein the threaded spindle (33) is a ball threaded spindle.
10. The riveting device according to claim 1, wherein the drive device (30) is an electromechanical drive device (30), and wherein the electromechanical drive device (30) comprises an electric motor (31) for driving the threaded spindle (33).
11. The riveting device according to claim 1, wherein the riveting device (1) is a hand riveting device with a handle part (2).
12. A blind rivet setting system (100), comprising: the riveting device (1) according to claim 1; and a rivet mandrel (120) of a blind rivet (110) to be set, wherein the rivet mandrel is received in the mandrel holder (12) of the riveting device (1).
13. A blind rivet nut setting system (200), comprising: a riveting device (1) according to claim 1; and a threaded rivet mandrel (220) for a blind rivet nut (210) to be set, wherein the threaded rivet mandrel is received in the mandrel holder (12) of the riveting device (1).
14. A blind rivet screw setting system (300), comprising: a riveting device (1) according to claim 1; and a threaded rivet mandrel (320) of a blind rivet screw (310) to be set, wherein the threaded rivet mandrel is received in the mandrel holder (12) of the riveting device (1).
15. A riveting device (1), comprising: a riveting tool (10), having a mouthpiece (11), a mandrel holder (12) that can be moved relative to the mouthpiece (11) along an operative axis (W), and a spring element (15) which exerts a force into the mandrel holder (12); and a drive device (30) for actuating the riveting tool (10) with a threaded spindle (33) having a feed thread (33.3), wherein the threaded spindle (33) receives the spring element (15), wherein the threaded spindle (33) is operatively connected to the mandrel holder (12) and configured to be moved along the operative axis (W), wherein the threaded spindle (33) has a front end (33.1) facing towards the mandrel holder (12) and an opposing back end (33.2), wherein the threaded spindle (33) is formed as a hollow spindle having a through hole (40), wherein the through hole (40) extends in a direction of a longitudinal extension of the threaded spindle (33), wherein the through hole (40) has a back longitudinal section (40.2) extending up to the opposing back end (33.2) of the threaded spindle (33) and a front longitudinal section (40.1) present in front of the back longitudinal section, wherein the threaded spindle (33) has a fixing structure (33.4) created by a material recess in a region of the front end (33.1), wherein the fixing structure (33.4) connects the threaded spindle (33) directly or indirectly to the mandrel holder (12), wherein the front longitudinal section (40.1) of the through hole (40) has a cross-sectional surface area which is smaller than a cross-sectional surface area of the back longitudinal section (40.2), wherein the spring element (15) is arranged in the back longitudinal section (40.2), wherein the threaded spindle (33) is engaged into a spindle nut (34) of a spindle gear (32) and in an initial state, present before actuating the riveting tool (10), the spring element (15) is arranged axially in the threaded spindle (33) in such a way that the spindle nut (34) and the spring element (15) overlap or an end of the spindle nut (34) facing towards the riveting tool (10) is in front of an end of the spring element (15) facing towards the riveting tool (10).
16. A blind rivet setting system (100), comprising: the riveting device (1) according to claim 15; and a rivet mandrel (120) of a blind rivet (110) to be set, wherein the rivet mandrel is received in the mandrel holder (12) of the riveting device (1).
17. A blind rivet nut setting system (200), comprising: a riveting device (1) according to claim 15; and a threaded rivet mandrel (220) for a blind rivet nut (210) to be set, wherein the threaded rivet mandrel is received in the mandrel holder (12) of the riveting device (1).
18. A blind rivet screw setting system (300), comprising: a riveting device (1) according to claim 15; and a threaded rivet mandrel (320) of a blind rivet screw (310) to be set, wherein the threaded rivet mandrel is received in the mandrel holder (12) of the riveting device (1).
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) Further characteristics and features result from the following description of several exemplary embodiments with reference to the drawing, which shows:
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DETAILED DESCRIPTION
(7)
(8) The exemplary riveting device 1 comprises a riveting tool 10 and a drive device 30 for actuating the riveting tool 10. Preferably, the riveting tool 10 is received in a tool housing 60. Preferably, the drive device 30 is received in a device housing 50. Preferably, the tool housing 60 is a metal housing. Preferably, the device housing 50 is a plastic housing.
(9) Preferably, the drive device 30 is an electromechanical drive device. The electromechanical drive device 30 comprises for example an electric motor 31 having a rotatable output shaft 31.1 and preferably a spindle gear 32, which can be driven by the electric motor 31. Preferably, the spindle gear 32 is set up to convert a rotational drive movement coming from the output shaft 31.1 into a translational drive movement which acts along an operative axis W to actuate the riveting tool 10. The spindle gear 32 can be a ball screw drive.
(10)
(11) The mouthpiece 11 is used, for example, to receive a rivet, in particular a blind rivet (not shown in
(12) Preferably, a spring element 15 is provided which exerts a force into the mandrel holder 12. The force of the spring element 15 can be used as a pretension force which causes or at least supports the fixing of the rivet mandrel in the mandrel holder 12. For example, the spring element 15 is provided in order to exert a spring force to the clamping elements 14, 14 inside the chuck housing 13. Therefore, the clamping elements 14, 14 are pushed into a clamping position against a rivet mandrel, for example of a blind rivet, introduced via the through hole 11.1 of the mouthpiece 11 into the chuck housing 13. For example, the spring element 15 is a compression spring.
(13) The riveting tool 10 can be actuated by the drive device 30 so that the mandrel holder 12 or the chuck housing 13 together with the rivet mandrel received therein is moved away from the mouthpiece 11 in the direction of the operative axis W. This happens, for example, by the drive device 30 pulling the mandrel holder 12 or the chuck housing 13 away from the mouthpiece 11. This mode of operation, which is known per se, and the blind riveting which can be carried out with it is described in more detail in the publication 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 publication may attach a meaning to identically worded terms which differs from the present meaning.
(14) Preferably, the mouthpiece 11 is fixed to the tool housing 60, for example screwed to it. Preferably, the mandrel holder 12, in particular the chuck housing 13, is received in the tool housing 60 so as to be movable in the direction of the operative axis W. For example, the tool housing 60 is tubular. For example, the mouthpiece 11 is fixed on one end of the tool housing 60 and the opposing end faces towards the device housing 50.
(15) Preferably, the spindle gear 32 is arranged in the device housing 50. Preferably, the spindle gear 32 comprises a threaded spindle 33 having a feed thread 33.3 and a spindle nut 34 that is or can be engaged with the latter. Preferably, the threaded spindle 33 and the spindle nut 34 are arranged concentrically to each other with regard to a transmission axis, in particular the transmission axis of the spindle gear 32. Preferably, the output shaft 31.1 of the electric motor 31 is arranged axially parallel to the transmission axis. Preferably, the transmission axis is on the operative axis W.
(16) For example, the threaded spindle 33 and the spindle nut 34 are set up in such a way that the spindle nut 34 is the gear element that is or can be driven by the electric motor 31 and the threaded spindle 33 is used for performing the translational drive movement in order to actuate the riveting tool 10. For example, the spindle nut 34 is mounted rotatably in the device housing 50 and the threaded spindle 33 is secured against rotation relative to the device housing 50.
(17) For example, the spindle nut 34 is rotatably mounted in the radial direction relative to the transmission axis or the operative axis W via at least one, preferably two radial bearing 35, 35 in the device housing 50. For example, the radial bearings 35, 35 are arranged at an axial distance from each other. For example, a drive point is located between the radial bearings 35, 35, by means of which the electric motor 31 is operatively connected to the spindle nut 34. For example, the radial bearings 35, 35 are roller bearings, in particular deep groove ball bearings.
(18) For example, the spindle nut 34 is mounted axially with respect to the transmission axis or the operative axis W via an axial bearing 36 in a support ring 39, for example serving as a bearing housing, wherein the support ring 39 is supported on the mouthpiece 11 in the axial direction via the tool housing 60. The tool housing 60 itself is held on the support ring 39, in particular held loosely, via a retaining structure 51, such as for example a ring-shaped cover element.
(19) Preferably, the support ring 39 is designed to be resistant to deformation and pressure-resistant. For example, the support ring 39 is a metal part. For example, the support ring 39 is a separate component. For example, the axial bearing 36 is an axial roller bearing. In principle, the axial bearing 36 can also be a needle bearing.
(20) As can be seen clearly for example from
(21) In relation to the mounting of the spindle gear 32, in particular the spindle nut 34, to the mounting of the reduction stages 37, 37, in particular the common intermediate shaft 38, and to the mounting of the electric motor 31, reference is made, for the purpose of the completion and expansion of the present disclosure, to the German patent application with the official file number DE 10 2022 116 406.3, with the note that the patent application may attribute a meaning to identical terms which differs from the present meaning.
(22) In particular, as can be seen from
(23) Preferably, the threaded spindle 33 is formed as a hollow spindle with a through hole 40 extending in the direction of its longitudinal extension. The through hole 40 makes it possible to remove any rivet mandrel remnants remaining from a riveting process from the riveting tool 10. For example, the through hole 40 on the back end 33.2 of the threaded spindle 33 leads into a removal sleeve 42, which again leads into a collection container 4 (
(24) Preferably, therefore the through hole 40 of the threaded spindle 33 has a diameter which is greater than the diameter of a rivet mandrel that can be or is used by the riveting tool 10. In order to be as compact as possible in the radial direction with respect to the operative axis W, the diameter of the through hole 40 of the threaded spindle 33 is preferably only slightly greater than the diameter of the rivet mandrel, so that there is no risk of the rivet mandrel getting jammed or stuck in the through hole 40 of the threaded spindle 33.
(25) The through hole 40 is further used in the exemplary riveting device 1 in order to accommodate the spring element 15. For example, the spring element 15 is arranged completely in the threaded spindle 33, in particular in the through hole 40. Therefore, the compactness of the riveting device 1 is improved, for example in comparison to an embodiment having a spring element on the outside of a threaded spindle. In this respect, the overall length can be reduced by the internally placed spring element 15.
(26) In order to accommodate the spring element 15 in the through hole 40 of the threaded spindle 33, it is provided, for example, that the through hole 40 has a back longitudinal section 40.2 extending up to the back end 33.2 of the threaded spindle 33 and a front longitudinal section 40.1 present before the back longitudinal section, and that the front longitudinal section 40.1 has a cross-sectional surface area which is smaller in comparison to the cross-sectional surface area of the back longitudinal section 40.2. The cross-sectional surface area of the back longitudinal section 40.2 is therefore greater than the cross-sectional surface area of the front longitudinal section 40.1.
(27) This design of the through hole 40 is, for example, specifically selected in order, firstly, to accommodate the greater radial extension of the spring element 15 compared to the radial extension of a rivet mandrel. Therefore, the cross-sectional surface area of the one longitudinal section 40.2 of the through hole 40 is greater than the cross-sectional surface area of the other longitudinal section 40.1 and preferably therefore the spring element 15 is arranged in the longitudinal section 40.2 having the greater cross-sectional surface area. Secondly, the longitudinal section having the greater cross-sectional surface area is the back longitudinal section 40.2 of the through hole 40. This longitudinal section is not additionally weakened by the fixing structure 33.4, in particular the fixing thread and, for example, an associated under cut, in comparison to the front longitudinal section 40.1.
(28) Preferably, the front longitudinal section 40.1 of the through hole 40 extends up to the front end 33.1 of the threaded spindle 33. In this manner, any component weakening of the threaded spindle 33 is counteracted in the region of the fixing structure 33.4. For example, the front longitudinal section 40.1 of the through hole 40 extends so far in the direction of the back end 33.2 of the threaded spindle 33 that the front longitudinal section 40.1 and the feed thread 33.3 of the threaded spindle 33 overlap each other in an overlapping section 41.
(29) For example, in an initial state, present before actuating the riveting tool 10, the spring element 15 is arranged axially in the threaded spindle 33 in such a way that the spindle nut 34 and the spring element 15 overlap or an end of the spindle nut 34 facing towards the riveting tool 10 is in front of an end of the spring element 15 facing towards the riveting tool 10. To transmit the force of the spring element 15 in the direction of the mandrel holder 12, a pressure part 16 is provided, for example. For example, the pressure part 16 is at least partially displaceably received in the front longitudinal section 40.1 of the through hole 40. For example, the spring element 15 is supported with its back end on the threaded spindle 33. This takes place in the exemplary riveting device 1, for example, via a counter holder 17. The counter holder 17 is fixed on the threaded spindle 33, for example, in particular screwed onto the back end 33.2 of the threaded spindle 33, for example screwed into the through hole 40 of the threaded spindle 33.
(30) Preferably, the spring element 15 has a through hole 15.1, extending in the direction of the longitudinal axis of the threaded spindle 33, the diameter of which through hole is greater than the diameter of a rivet mandrel which can be used by the riveting tool 10. Preferably, the pressure part 16 is formed as a preferably elongate hollow body having a through hole 16.1 extending in the direction of its longitudinal extension, the diameter of which through hole is greater than the diameter of a rivet mandrel which can be used by the riveting tool 10. Preferably, the counter holder 17 is formed as a preferably elongate hollow body having a through hole 17.1 extending in the direction of its longitudinal extension, the diameter of which through hole is greater than the diameter of a rivet mandrel which can be used by the riveting tool 10. In this manner, it is possible to realise a mandrel removal path, in the case of which the collection container 4 can be used as a collector for mandrel remnants.
(31) For example, the diameter of the through hole 15.1 of the spring element 15 and/or the diameter of the through hole 17.1 of the counter holder 17 is so large that an intermediate sleeve or an intermediate tube (not shown in
(32) The riveting device 1 can be a hand riveting device. The hand riveting device 1 has a gripping surface 2.1, for example, which can be formed at least partially on the device housing 50. For example, the hand riveting device 1 has a handle part 2 which is at least partially formed by the device housing 50. The riveting device 1 can be held in the hand by the gripping surface 2.1 or the handle part 2 when it is positioned on a workpiece for setting a blind rivet. The riveting process takes place then by actuating the riveting tool 10 via the drive device 30.
(33) A preferably replaceable electrical energy storage device, such as an accumulator 3, can be provided for the electrical energy supply of the drive device 30, which energy storage device is arranged, for example, in the region of an end of the handle part 2 facing away from the riveting tool 10. Therefore, the riveting device 1 can be a cordless tool.
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(36) For example, with the exemplary blind rivet nut setting tool 200, the pressure part 16 is introduced into a receptacle of the threaded rivet mandrel 220 and forms a positive-locking rotationally-fixed connection to the threaded rivet mandrel 220 via the receptacle. For example, the pressure part 16 is held in the receptacle of the threaded rivet mandrel 220 by the force of the spring element 15 of the riveting device 1 (
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(38) For example, with the exemplary blind rivet screw setting tool 300, the pressure part 16 acts on the screw-in part, in particular the pressure part 16 is introduced into a receptacle of the screw-in part and forms a positive-locking rotationally-fixed connection to the screw-in part via the receptacle. For example, the pressure part 16 is held in the receptacle of the screw-in part by the force of the spring element 15 of the riveting device 1 (
REFERENCE NUMERAL LIST
(39) 1 riveting device 2 handle part 2.1 gripping surface 3 accumulator 4 collection container 10 riveting tool 11 mouthpiece 11.1 through hole 12 mandrel holder 13 chuck housing 14 clamping element 14 clamping element 15 spring element 15.1 through hole 16 pressure part 16.1 through hole 17 counter holder 17.1 through hole 30 drive device 31 electric motor 31.1 output shaft 32 spindle gear 33 threaded spindle 33.1 front end 33.2 back end 33.3 feed thread 33.4 fixing structure 34 spindle nut 35 radial bearing 35 radial bearing 36 axial bearing 37 reduction stage 37 reduction stage 38 intermediate shaft 39 support ring 40 through hole 40.1 front longitudinal section 40.2 back longitudinal section 41 overlapping section 42 removal sleeve 42.1 through hole 50 device housing 51 retaining structure 60 tool housing 100 blind rivet setting tool 110 blind rivet 120 rivet mandrel 200 blind rivet nut setting tool 210 blind rivet nut 220 threaded rivet mandrel 300 blind rivet screw setting tool 310 blind rivet screw 320 threaded rivet mandrel W operative axis