EP2113317A1 - Machine électrique pour appliquer des éléments de fixation - Google Patents

Machine électrique pour appliquer des éléments de fixation Download PDF

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Publication number
EP2113317A1
EP2113317A1 EP09159215A EP09159215A EP2113317A1 EP 2113317 A1 EP2113317 A1 EP 2113317A1 EP 09159215 A EP09159215 A EP 09159215A EP 09159215 A EP09159215 A EP 09159215A EP 2113317 A1 EP2113317 A1 EP 2113317A1
Authority
EP
European Patent Office
Prior art keywords
machine according
electric motor
pulling
pulling element
driving shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09159215A
Other languages
German (de)
English (en)
Inventor
Massimo Generali
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Far Srl
Original Assignee
Far Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Far Srl filed Critical Far Srl
Publication of EP2113317A1 publication Critical patent/EP2113317A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/16—Drives for riveting machines; Transmission means therefor
    • B21J15/26—Drives for riveting machines; Transmission means therefor operated by rotary drive, e.g. by electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/105—Portable riveters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/30—Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
    • B21J15/32—Devices for inserting or holding rivets in position with or without feeding arrangements
    • B21J15/326—Broken-off mandrel collection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0007—Tools for fixing internally screw-threaded tubular fasteners
    • B25B27/0014—Tools for fixing internally screw-threaded tubular fasteners motor-driven

Definitions

  • the present invention relates to an electric machine for applying fastening elements such as rivets or threaded inserts whose installation involves their deformation.
  • Machines for applying inserts or rivets comprise pulling means intended to be associated with a corresponding fastening element so as to deform it in such a way that it is fixed in its hole.
  • the pulling means comprise a threaded male component designed to engage with the thread of the corresponding insert.
  • Machines for applying rivets commonly known as “machines for rivets” or “riveters”, referred to herein without thereby limiting the scope of the invention, deform the rivet by extracting a mandrel or stem from it.
  • rivets comprise a pre-formed factory head, a cylindrical shank, which together form a deformable bush, and a stem located inside the bush, interfering with the shank and designed to partly deform the shank to form a shop or upset head during rivet application.
  • the pulling means grip the stem and extract it from the rest of the rivet, causing deformation of the shank (and formation of the shop head) and breakage of the stem.
  • the pulling means comprise gripping means for firmly gripping the stem and movement means connected to the gripping means for extracting the stem by means of a straight movement.
  • Prior art electric machines for applying rivets or inserts also comprise an electric motor for driving the pulling means, the motor being positioned alongside the pulling means.
  • the electric motor is positioned in a compartment made in a machine handle.
  • Suitable transmission means allow the transfer of the required torque from the electric motor to the pulling means.
  • the transmission means comprise a plurality of gears connected to each other.
  • the transmission means are complex and bulky.
  • the technical purpose of the present invention is to propose an electric machine for applying fastening elements, threaded inserts or rivets, which is free of the above-mentioned disadvantages.
  • the present invention has for an aim to propose an electric machine for applying fastening elements which features compact dimensions.
  • the present invention also has for an aim to propose an electric machine for applying fastening elements which is simple to make.
  • the present invention achieves the technical purpose and the aims described with an electric machine for applying fastening elements comprising the technical features described in one or more of the appended claims.
  • the numeral 1 denotes as a whole an electric machine for applying fastening elements, a machine for rivets or riveter in Figure 1 and a machine for inserts in Figure 2 , according to the present invention.
  • the electric machine 1 is designed to apply rivets 2 of the pop rivet type (otherwise known as blind rivets).
  • the latter comprise, before application, a pre-formed factory head 3 and a hollow cylindrical shank 4, which together form a deformable bush.
  • a mandrel or stem 5 is inserted in the shank 4 and interferes with the shank in such a way that, when the stem 5 is extracted during rivet 2 application, the shank 4 is partly deformed to form a shop head (not illustrated).
  • the electric riveter 1 has a substantially cylindrical shape and extends along its own longitudinal axis "A".
  • the electric riveter 1 comprises a pulling element 6 acting on the rivet 2 stem 5 to extract the stem during rivet application.
  • the pulling element 6 can move in a pulling direction "B" extending at least parallel with the longitudinal axis "A" of the electric machine 1. In the accompanying drawing, the pulling direction "B" coincides with the longitudinal axis "A”.
  • the pulling element 6 is located at a first end 1a of the electric machine 1.
  • An electric motor 7 is connected, by transmission means 8, to the pulling element 6 so as to move it in the pulling direction "B".
  • the electric motor 7 is positioned in such a way that it axis of rotation "C" is aligned with the pulling direction "B". In other words, the axis of rotation "C" of the electric motor 7 coincides with the pulling direction "B" of the pulling element 6.
  • the electric motor 7 is positioned within the cylindrical transversal dimensions of the electric riveter 1.
  • the electric riveter 1 of Figure 1 also has a channel 9 positioned longitudinally for allowing the expulsion of waste, that is to say, of the stem 5, or part of it, once it has been extracted and the rivet 2 has been applied.
  • the channel 9 extends from the pulling element 6 along the entire longitudinal axis "A" of the electric riveter 1, leading to a containment compartment 10 formed by a box-shaped body 11 positioned at a second end 1b of the electric riveter 1, opposite the first end 1a.
  • the electric motor 7 has a central cavity 12 positioned coaxially with the axis of rotation "C" of the electric motor 7, thus at least partly forming the channel 9 and consequently allowing waste expulsion.
  • the central cavity 12 is substantially cylindrical.
  • the electric motor 7 comprises a driving shaft 13 positioned along the longitudinal axis "A" of the electric riveter 1 in such a way that the axis of rotation "C" of the electric motor 7 is at least parallel with the longitudinal axis "A” and coincides with the pulling direction "B".
  • the driving shaft 13 is hollow, forming the central cavity 12. In other words, the driving shaft 13 has a sleeve configuration.
  • the electric motor 7 is of the brushless type and comprises a stator 14 and a rotor 15.
  • the stator 14 comprises a plurality of windings 16 (schematically illustrated in the accompanying drawing) made of copper and positioned so that they are separated from each other by equal angles on a fixed support 17.
  • the rotor 15 is connected to the driving shaft 13 to drive the rotation of the latter and comprises at least one permanent magnet 18.
  • the rotor 15 comprises a plurality of permanent magnets 18 (schematically illustrated in the accompanying drawing).
  • the magnets 18 are placed alongside the windings 16 and are advantageously positioned on the outside of the windings. In other words, the magnets 18 lie in a distal position relative to the axis of rotation "C" of the electric motor 7 so that the windings 16 are positioned between the magnets 18 and the axis of rotation "C".
  • the rotor 15 also comprises a ring 19 connecting it to the driving shaft 13.
  • the driving shaft 13 comprises a flange 20 positioned at its first end 13a giving onto the containment compartment 10 for the extracted stems 5.
  • the ring 19 is fixed to the permanent magnets 18 and is connected to the driving shaft 13. More precisely, the ring 19 is connected to the driving shaft 13 flange 20 by screws 21 positioned in such a way that they are separated by equal angles.
  • the driving shaft 13 is rotatably connected to the stator 14 support 17 by a plurality of ball bearings 22.
  • Suitable electronic control means allow electricity to be supplied to the windings 16 so that they generate a rotary magnetic field, that is to say, the control means allow the electric machine 1 to be operated.
  • the magnetic field moves the rotor 15 permanent magnets 18, rotating the rotor and, with it, the driving shaft 13.
  • the magnetic field generated by the motor has no effect at all whether the motor is switched on or off. Moreover, since the rotor 15 permanent magnets 18 are far from the axis of rotation, the magnetic field they generate does not interfere with waste transit.
  • the electric riveter 1 transmission means 8 comprise a device 23 for reducing the speed which is interposed between the electric motor 7 and the pulling element 6.
  • the reduction device 23 is single - stage and of the type with an epicyclic train and comprises a central (or sun) gear 24 directly connected to electric motor 7.
  • the sun gear 24 is hollow so that in combination with the central cavity 12 of the electric motor 7 it at least partly forms the channel 9 for moving away the extracted stems 5.
  • the hollow sun gear 24 is coaxial with the driving shaft 13 and is fixed to a second end 13b, opposite the first end, of the driving shaft 13 and is made in one piece with the latter.
  • the reduction device 23 also comprises at least one planet gear 25 meshing with the sun gear 24 and able to rotate about the latter.
  • the reduction device 23 comprises three planet gears 25 spaced at equal angular intervals of 120° from each other. In that way, during electric riveter 1 operation, the planet gears 25 are balanced and do not induce vibrations.
  • the planet gears 25 also mesh with a fixed ring gear 26 coaxial with the pulling direction "B". As shown in the accompanying drawing, the ring gear 26 has a toothed surface 26a facing inwards.
  • the planet gears 25 are supported by a carrier 27 by means of respective pins 28.
  • the carrier 27 is rotationally driven by the sun gear 24 by means of the planet gears 25. It should be noticed that the ratio of the angular speed of the carrier 27 to the angular speed of the driving shaft 13 is determined by the ratio of the number of teeth on the central sun gear 24, the planet gears 25, the ring gear 26 and the carrier 27.
  • the transmission means 8 are connected to the pulling element 6 by a screw connection, so as to transmit and convert a rotary motion from the electric motor 7 into a linear motion by the pulling element 6.
  • the pulling element 6 comprises gripping means 31, needed to firmly grip the rivet 2 stem 5 and a slider 32 connected to the gripping means 31 and able to move to and fro in the pulling direction "B" to move the gripping means 31.
  • the slider 32 has a substantially cylindrical shape and is housed in a hollow containment body 33.
  • the slider 32 comprises a central longitudinal hole 34 extending in the pulling direction "B" so that it partly forms the channel 9 for expulsion of the extracted stems 5.
  • the slider 32 comprises a tab 35 extending longitudinally on its side surface 32a.
  • the tab 35 is housed in a straight guide 36 made in the containment body 33 in such a way that the slider 32 can only move with a straight to and fro motion in the containment body 33.
  • the gripping means 31 are connected to the slider 32 at its first end 32b positioned close to the first end 1a of the electric riveter 1.
  • the gripping means 31 comprise at least two jaws 37 designed to engage directly with the rivet 2 stem 5 and a supporting body 38 connected to the jaws 37.
  • the supporting body 38 is substantially cylindrical and hollow, forming the expulsion channel 9.
  • the supporting body 38 is slidably housed in a socket 39 made in the first end 32b of the slider 32.
  • the jaws 37 are held in contact with a hollow closing element 40 screwed onto the slider 32.
  • the jaws 37 are in contact with tapered inner surfaces 40a of the hollow closing element 40.
  • a spring 41 is positioned in the socket 39, between the slider 32 and the gripping means 31 supporting body 38. More precisely, the spring 41 acts between a base 39a of the socket 39 and a shoulder 38a of the supporting body 38. The spring 41 guarantees that the gripping means 31 are held in position and, in particular, guarantees that the jaws 37 are in contact with the hollow closing element 40.
  • the containment body 33 comprises an end portion 42 positioned at the first end 1a of the electric riveter 1. Said end portion 42 is hollow and at least partly houses the gripping means 31 and the hollow closing element 40.
  • the end portion 42 has a hole 43, allowing insertion of the stem 5 of the rivet 2 to be applied, until it reaches the gripping means 31.
  • the transmission means 8 are connected to the pulling element 6 by a screw connection.
  • the carrier 27 is connected by threading to the slider 32.
  • the carrier 27 comprises a sleeve 44, coaxial with the pulling direction "B", having a threaded portion 44a meshing with a corresponding threaded portion 32c of the slider 32 at a second end 32d of the slider.
  • the transmission means 8 do not comprise any reduction device.
  • the transmission means comprise a sleeve fixed to the driving shaft 13 and connected in a similar way to the slider 32.
  • the machine 1 for inserts does not have the longitudinal cavity for waste expulsion, there being no waste, and it differs from the machine 1 for rivets because of its different pulling element.
  • the machine 1 for inserts also has the longitudinal cavity 9 although it remains unused.
  • the pulling element 6 is, similarly, rotationally driven by the electric motor 7 using the transmission means 8.
  • the pulling element 6 comprises a rotary body 50 and a threaded male component 51 connected to the body 50 and designed to engage in a corresponding threaded insert 52.
  • the rotary body 50 can rotate inside the hollow containment body 33 and, in the preferred embodiment illustrated by way of example it is formed by the carrier 27 to which the male component 51 is connected.
  • the insert 52 has a portion 53 with inner threading and a deformable portion 54.
  • the pulling action is obtained, in the substantially known way, by rotation of the male component 51 which is translated into a translating motion by the portion 53 against the portion 54 which yields, becoming deformed and guarantees insert 52 fixing in the corresponding hole.
  • the electric machine 1 for applying fastening elements according to the present invention comprises a handle extending transversally to the longitudinal axis "A".
  • the handle houses the electronic control means.
  • the invention fulfils the proposed aims and achieves important advantages.
  • the electric motor Since the electric motor is positioned so that it is aligned with the pulling direction of the pulling element, the dimensions of the electric riveter are definitely contained. Also, special compartments for housing the electric motor are not necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
EP09159215A 2008-04-30 2009-04-30 Machine électrique pour appliquer des éléments de fixation Withdrawn EP2113317A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBO20080271 ITBO20080271A1 (it) 2008-04-30 2008-04-30 Macchina elettrica per l'applicazione di elementi di fissaggio.

Publications (1)

Publication Number Publication Date
EP2113317A1 true EP2113317A1 (fr) 2009-11-04

Family

ID=40296685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09159215A Withdrawn EP2113317A1 (fr) 2008-04-30 2009-04-30 Machine électrique pour appliquer des éléments de fixation

Country Status (2)

Country Link
EP (1) EP2113317A1 (fr)
IT (1) ITBO20080271A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104010746A (zh) * 2012-02-23 2014-08-27 株式会社龙博特 电动铆钉机
CN105397015A (zh) * 2015-12-31 2016-03-16 无锡贝斯特精机股份有限公司 接钉送钉装置
US10022782B1 (en) 2017-01-13 2018-07-17 Milawukee Electric Tool Corporation Attachment for a rivet setting tool
US11654475B2 (en) 2020-06-03 2023-05-23 Milwaukee Electric Tool Corporation Rivet setting tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3008598A (en) * 1960-09-28 1961-11-14 Martin Alan Rivet nut tool
US4085337A (en) * 1975-10-07 1978-04-18 Moeller Wolfgang W Electric drill multi-functional apparatus
DE8613823U1 (de) * 1986-05-22 1986-07-31 Erwin Müller GmbH & Co, 4450 Lingen Blindnietzange, vorzugsweise Blindniet-Handzange
WO2008010992A1 (fr) * 2006-07-17 2008-01-24 Abeo, Llc Moteur comprenant un arbre d'entraînement creux
WO2009018341A2 (fr) * 2007-08-01 2009-02-05 Abeo, Llc Riveteuse pneumatique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3008598A (en) * 1960-09-28 1961-11-14 Martin Alan Rivet nut tool
US4085337A (en) * 1975-10-07 1978-04-18 Moeller Wolfgang W Electric drill multi-functional apparatus
DE8613823U1 (de) * 1986-05-22 1986-07-31 Erwin Müller GmbH & Co, 4450 Lingen Blindnietzange, vorzugsweise Blindniet-Handzange
WO2008010992A1 (fr) * 2006-07-17 2008-01-24 Abeo, Llc Moteur comprenant un arbre d'entraînement creux
WO2009018341A2 (fr) * 2007-08-01 2009-02-05 Abeo, Llc Riveteuse pneumatique

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104010746A (zh) * 2012-02-23 2014-08-27 株式会社龙博特 电动铆钉机
US9180510B2 (en) 2012-02-23 2015-11-10 Lobtex Co., Ltd. Electric riveter
CN104010746B (zh) * 2012-02-23 2016-05-18 株式会社龙博特 电动铆钉机
CN105397015A (zh) * 2015-12-31 2016-03-16 无锡贝斯特精机股份有限公司 接钉送钉装置
US10022782B1 (en) 2017-01-13 2018-07-17 Milawukee Electric Tool Corporation Attachment for a rivet setting tool
US11654475B2 (en) 2020-06-03 2023-05-23 Milwaukee Electric Tool Corporation Rivet setting tool

Also Published As

Publication number Publication date
ITBO20080271A1 (it) 2009-11-01

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