Riveting tool

Abstract

The invention relates to a riveting tool for setting blind rivet nuts and/or blind rivet screws with a drive piston hydraulically adjustable between a starting position and an end position and a pull rod operationally connected with the drive piston and adjustable between a rivet receiving position and a setting position. In order to provide a riveting tool with a hydraulically driven drive piston, which has a simple and good adaptability for the blind rivet screws and/or blind rivet nuts to be set, it is provided that a coupling unit, a tractive tool adjusted for the blind rivet nut and/or blind rivet screw as well as the pull rod are designed for the form-fitting connection of the pull rod with the tractive tool, which is releasable in the direction of the longitudinal axis and in the circumferential direction.

Claims

1. A riveting tool for setting blind rivet nuts and/or blind rivet screws with a hydraulic drive piston adjustable in a direction of a longitudinal axis of the riveting tool between a starting position and an end position and a pull rod operationally connected with the hydraulic drive piston and adjustable between a rivet receiving position and a setting position as the drive piston is adjusted between the starting position and the end position, a tractive tool for receiving a blind rivet head and/or a blind rivet screw adapted for the tractive tool; and a coupling unit having two coupling half shells, wherein there is a form fitting connection of the pull rod and the tractive tool by the coupling unit, the tractive tool and the pull rod, such that the pull rod is releasably connected to the tractive tool in the direction of the longitudinal axis and in a circumferential direction and wherein in a coupling section of the pull rod and of the tractive tool have annularly circumferential grooves and the coupling half shells have webs for engaging with the grooves.

2. The riveting tool according to claim 1, wherein the two coupling half shells are designed to provide the form-fitting connection of the pull rod and the tractive tool in the direction of the longitudinal axis.

3. The riveting tool according to claim 1, wherein a web extending transversely to the direction of the longitudinal axis is arranged on one of the tractive tool and the pull rod in a contact area of the tractive tool and the pull rod and a correspondingly configured groove extending transversely to the direction of the longitudinal axis is arranged on the other of the tractive tool and pull rod.

4. The riveting tool according to claim 1, wherein a centering pin that can be brought to engage with the tractive tool and the pull rod is arranged in a contact area of the tractive tool and the pull rod.

5. The riveting tool according to claim 1, wherein the pull rod is pretensioned in a direction towards the rivet receiving position and/or the drive piston in a direction towards the starting position.

6. The riveting tool according to claim 1, wherein the drive piston comprises a through opening, and the pull rod is arranged in the through opening of the drive piston and the pull rod is in a form-fitting connection to the drive piston in a direction towards the rivet receiving position.

7. The riveting tool according to claim 1, further comprising a guide pin connected with a rotary wheel, wherein the pull rod has a displaceable and torque-proof connection with the guide pin in the direction of the longitudinal axis.

8. The riveting tool according to claim 1, further comprising a guide sleeve and a housing, wherein the two coupling half shells are movably mounted in the guide sleeve arranged on the housing.

9. The riveting tool according to claim 8, wherein the guide sleeve has a rivet head receiver and the rivet head receiver comprises holding magnets arranged in the rivet head receiver.

10. The riveting tool according to claim 1, further comprising a housing connectable with a hydraulic line, wherein the housing has a cylindrical inner surface for guiding the drive piston and an internal thread on one or both sides of the housing.

11. A riveting tool for setting blind rivet nuts and/or blind rivet screws with a hydraulic drive piston adjustable in a direction of a longitudinal axis of the riveting tool between a starting position and an end position, a pull rod operationally connected with the hydraulic drive piston and adjustable between a rivet receiving position and a setting position as the drive piston is adjusted between the starting position and the end position, a tractive tool for receiving a blind rivet head and/or a blind rivet screw adapted for the tractive tool; and a coupling unit, wherein there is a form-fitting connection of the pull rod and the tractive tool by the coupling unit, the tractive tool and the pull rod, such that the pull rod is releasably connected to the tractive tool in the direction of the longitudinal axis and in a circumferential direction, wherein the drive piston comprises a through opening, and the pull rod is arranged in the through opening of the drive piston, and wherein the pull rod is in a form-fitting connection to the drive piston in a direction towards the rivet receiving position.

12. The riveting tool according to claim 11, wherein the coupling unit has two coupling half shells designed to provide the form-fitting connection of the pull rod and the tractive tool in the direction of the longitudinal axis.

13. The riveting tool according to claim 12, further comprising a guide sleeve and a housing, wherein the two coupling half shells are movably mounted in the guide sleeve arranged on the housing.

14. The riveting tool according to claim 13, wherein the guide sleeve has a rivet head receiver and the rivet head receiver comprises holding magnets arranged in the rivet head receiver.

15. The riveting tool according to claim 11, wherein a web extending transversely to the direction of the longitudinal axis is arranged on one of the tractive tool and the pull rod in a contact area of the tractive tool and the pull rod and a correspondingly configured groove extending transversely to the direction of the longitudinal axis is arranged on the other of the tractive tool and pull rod.

16. The riveting tool according to claim 11, wherein a centering pin that can be brought to engage with the tractive tool and the pull rod is arranged in a contact area of the tractive tool and the pull rod.

17. The riveting tool according to claim 11, wherein the pull rod is pretensioned in a direction towards the rivet receiving position and/or the drive piston in a direction towards the starting position.

18. The riveting tool according to claim 11, further comprising a guide pin connected with a rotary wheel, wherein the pull rod has a displaceable and torque-proof connection with the guide pin in the direction of the longitudinal axis.

19. The riveting tool according to claim 11, further comprising a housing connectable with a hydraulic line, wherein the housing has a cylindrical inner surface for guiding the drive piston and an internal thread on one or both sides of the housing.

20. The riveting tool according to claim 11, further comprising a housing connectable with a hydraulic line, wherein the housing has a cylindrical inner surface for guiding the drive piston and an internal thread on one or both sides of the housing.

21. A riveting tool for setting blind rivet nuts and/or blind rivet screws with a hydraulic drive piston adjustable in a direction of a longitudinal axis of the riveting tool between a starting position and an end position, a pull rod operationally connected with the hydraulic drive piston and adjustable between a rivet receiving position and a setting position as the drive piston is adjusted between the starting position and the end position, a tractive tool for receiving a blind rivet head and/or a blind rivet screw adapted for the tractive tool; and a coupling unit a guide pin and a rotary wheel, wherein there is a form-fitting connection of the pull rod and the tractive tool by the coupling unit, the tractive tool and the pull rod, such that the pull rod is releasably connected to the tractive tool in the direction of the longitudinal axis and in a circumferential direction, wherein the guide pin is connected with a rotary wheel, and the pull rod has a displaceable and torque-proof connection with the guide pin in the direction of the longitudinal axis.

22. The riveting tool according to claim 21, wherein the coupling unit has two coupling half shells designed to provide the form-fitting connection of the pull rod and the tractive tool in the direction of the longitudinal axis.

23. The riveting tool according to claim 22, further comprising a guide sleeve and a housing, wherein the two coupling half shells are movably mounted in the guide sleeve arranged on the housing.

24. The riveting tool according to claim 23, wherein the guide sleeve has a rivet head receiver and the rivet head receiver comprises holding magnets arranged in the rivet head receiver.

25. The riveting tool according to claim 21, wherein a web extending transversely to the direction of the longitudinal axis is arranged on one of the tractive tool and the pull rod in a contact area of the tractive tool and the pull rod and a correspondingly configured groove extending transversely to the direction of the longitudinal axis is arranged on the other of the tractive tool and pull rod.

26. The riveting tool according to claim 21, wherein a centering pin that can be brought to engage with the tractive tool and the pull rod is arranged in a contact area of the tractive tool and the pull rod.

27. The riveting tool according to claim 21, wherein the pull rod is pretensioned in a direction towards the rivet receiving position and/or the drive piston in a direction towards the starting position.

28. A riveting tool for setting blind rivet nuts and/or blind rivet screws with a hydraulic drive piston adjustable in a direction of a longitudinal axis of the riveting tool between a starting position and an end position, a pull rod operationally connected with the hydraulic drive piston and adjustable between a rivet receiving position and a setting position as the drive piston is adjusted between the starting position and the end position, a tractive tool for receiving a blind rivet head and/or a blind rivet screw adapted for the tractive tool; and a coupling unit having two coupling half shells, wherein the two coupling half shells provide a form-fitting connection of the pull rod and the tractive tool in the direction of the longitudinal axis, such that the pull rod is releasably connected to the tractive tool in the direction of the longitudinal axis and in a circumferential direction.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) An exemplary embodiment of the invention is explained below with reference to the drawings. The drawings show the following:

(2) FIG. 1 an exploded representation of a riveting tool and

(3) FIG. 2 a sectional view of the riveting tool from FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

(4) FIGS. 1 and 2 show an exemplary embodiment of a riveting tool 1 in an exploded representation (FIG. 1) and in a sectional view (FIG. 2).

(5) The riveting tool 1 has, as the central structural element, a drive unit 2, which has a housing 4 as well as a drive piston 3 adjustably mounted in the housing 4 between a starting position and an end position. The adjustment of the drive piston 3 thereby takes place hydraulically, wherein the drive piston 3 in the area of a cylinder section 5 of the housing 4 is mounted in a liquid-tight manner within the housing 4 on a cylinder inner surface 28 so that a pressurization of the drive piston 3 via a hydraulic line that is connectable to a connecting piece 43 and that is not shown here effectuates a displacement of the drive piston 3 out of the starting position shown in FIG. 1 into an end position (not shown here). In order to seal the cylinder section 5 of the housing 4 that is pressurizable with hydraulic fluid, a ring seal 30 for sealing with respect to the drive piston 3 is arranged within the housing 4 and a ring seal 47 abutting against the cylinder inner surface 28 is arranged on the drive piston 3.

(6) The drive piston 3 serves to adjust a pull rod 11, which is releasably connected with a tractive tool 10 in the direction of the longitudinal axis as well as in the circumferential direction via a coupling unit 12. The pull rod 11 thereby extends within a through opening 44 of the drive piston 3 wherein the insertion depth of the pull rod 11 into the drive piston 3 is restricted by a flange facing the drive piston 3, which abuts against a stop surface of the drive piston 3 in the installed position in the direction of the longitudinal axis. For the form-fitting connection of the pull rod 11 with the tractive tool 10 via the coupling unit 12 in the direction of the longitudinal axis and in the circumferential direction, the pull rod 11 and the tractive tool 10 have annularly circumferential projections 41 in a connection section in contact with the coupling unit 12. Two coupling half shells 14 used to form the coupling unit 12 have in the installed state inwardly protruding grooves 15 and webs 50, which engage in the grooves of pull rod 11 and tractive tool 10 arranged between the projections 41 and thus establish a form-fitting connection in the direction of the longitudinal axis. In the installed state, the position of the coupling half shells 14 is also secured via pins arranged on one coupling half shell 14 and not shown here, which engage in pin receivers 16 of the other coupling half shell 14.

(7) For the torque-proof connection of pull rod 11 and tractive tool 10, they have webs 19 and grooves 40 engaging with each other in the contact area facing each other and progressing transversely to the direction of the longitudinal axis, wherein the webs 19 are arranged crosswise on the front side facing the tractive tool 10 and the tractive tool 10 has correspondingly crosswise designed grooves 40 on its front side facing the pull rod 11. In the installed state, a centering pin 18 protruding from the front surface of the pull rod 11 in the direction towards the tractive tool 10 also serves to secure the position of the tractive tool 10 with respect to the pull rod 11, wherein the tractive tool 10 engages in a correspondingly designed bore hole of the tractive tool 10. In order to guide the tractive tool 10 between the position assigned to the rivet receiving position and the setting position of the pull rod 11, the riveting tool 10 is provided with a guide sleeve 7 forming a guide unit 6, which is adjusted on the inside for the diameter of the coupling unit 12 and thus serves as a linear guide. The guide sleeve 7 is thereby fastened on an internal thread 33 of a sleeve receiver 13 via an external thread 32, which is fixed on an internal thread 35 arranged on the housing 4 via an external thread 34. A locking ring 51, which is arranged coaxially to the guide sleeve 7 and abuts against a front surface of the sleeve receiver 13, thereby serves to secure the position of the guide sleeve 7 on the sleeve receiver 13.

(8) The guide sleeve 7 has a rivet head receiver 9 for receiving a rivet head 8 adjusted for the tractive tool 10, within which several holding magnets 29 are arranged annularly and coaxially to a through opening, which enable a releasable fastening of the rivet head 8 on the guide sleeve 7.

(9) The pull rod 11 releasably connected with the tractive tool 10 forms, with a guide pin 22, a threaded sleeve 23, a rotary wheel 24 and a helical compression spring 21, a structural unit connected in a non-releasable manner in normal operation. The pull rod 11 thereby has a bore hole 26, within which the guide pin 22 is axially movable. The axial movability is thereby determined via the length of a slit 25 extending through the guide pin 22 in the direction of the longitudinal axis, wherein a fastening bolt 20 connected with the pull rod 11 extends through this slit 25. The fastening bolt 20 also guarantees a transmission of the rotational movements of the guide pin 22 towards the pull rod 11, wherein this rotational movement is then transmitted to the tractive tool 10.

(10) The rotational movement of the guide pin 22 is thereby effectuated by the actuation of a rotary wheel 24, which is arranged in a torque-proof manner in a receiving opening 46 of a receiving section 48 of the guide pin 22. For the releasable arrangement of the structural unit made up of the pull rod 11, guide pin 22, threaded sleeve 23, helical compression spring 21 and rotary wheel 24 on the housing 4, the threaded sleeve 23 has an internal thread 42, which can be screwed onto an external thread 39 of an adapter bushing 17, wherein the adapter bushing 17 with a further external thread section 38 can be screwed into an internal thread 37 of the housing 4. Different structural units having a pull rod 11 can thus be combined with a uniform housing 4 of a riveting tool 1 via the adapter bushing 17. The helical compression spring 21 is reinforced on one end against an inner surface of the threaded sleeve 23 and on the other end on a flange of the pull rod 11. In the installed state, the helical compression spring 21 thus pretensions the pull rod 11 in the direction towards the drive piston 3. A displacement of the drive piston 3 as well as of the pull rod 11 connected with the drive piston 3 in a form-fitting manner in the direction of the longitudinal axis from the starting position into the end position thus takes place against the spring force of the helical compression spring 21.

REFERENCE LIST

(11) 1 Riveting tool 2 Drive unit 3 Drive piston 4 Housing 5 Cylinder section 6 Guide unit 7 Guide sleeve 8 Rivet head 9 Rivet head receiver 10 Tractive tool 11 Pull rod 12 Coupling unit 13 Shell receiver 14 Coupling half shell 15 Grooves 16 Pin receiver 17 Adapter bushing 18 Centering pin 19 Webs 20 Fastening bolt 21 Helical compression spring 22 Guide pin 23 Threaded sleeve 24 Rotary wheel 25 Slit 26 Bore hole 28 Cylinder inner surface 29 Holding magnet 30 Ring seal 32 External thread 33 Internal thread 34 External thread 35 Internal thread 37 Internal thread 38 External thread 39 External thread 40 Grooves 41 Projections 42 Internal thread 43 Connecting piece 44 Through opening 46 Receiving opening 47 Ring seal 48 Receiving section 50 Webs 51 Locking ring