WO1996019321A1 - Adaptateur pour machines a percussion axiale - Google Patents

Adaptateur pour machines a percussion axiale Download PDF

Info

Publication number
WO1996019321A1
WO1996019321A1 PCT/EP1995/004996 EP9504996W WO9619321A1 WO 1996019321 A1 WO1996019321 A1 WO 1996019321A1 EP 9504996 W EP9504996 W EP 9504996W WO 9619321 A1 WO9619321 A1 WO 9619321A1
Authority
WO
WIPO (PCT)
Prior art keywords
axial
coupling members
machine
coupling
impact
Prior art date
Application number
PCT/EP1995/004996
Other languages
German (de)
English (en)
Inventor
Helmut Österle
Erich Palm
Original Assignee
Sfs Industrie Holding Ag
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 Sfs Industrie Holding Ag filed Critical Sfs Industrie Holding Ag
Priority to AU43870/96A priority Critical patent/AU4387096A/en
Publication of WO1996019321A1 publication Critical patent/WO1996019321A1/fr

Links

Classifications

    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0064—Means for adjusting screwing depth
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • B25B21/023—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket for imparting an axial impact, e.g. for self-tapping screws
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/1405—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers for impact wrenches or screwdrivers

Definitions

  • the invention relates to an attachment for a machine working with an axial impact, such as a hammer drill or a rotary hammer, in which or in which the impact is transmitted to the output shaft under axial load.
  • an axial impact such as a hammer drill or a rotary hammer
  • Impact drills or rotary hammers are usually used - as the name suggests - with the help of an impact drill to make holes.
  • the field of application is therefore limited to the production of holes in concrete or masonry. Even when drilling in wood, a drill without an axial impact is normally used.
  • DE-AS 14 78 914 describes the setting of screws in such a way that, in addition to the rotary movement of the screw, an axial impact is also provided. The impact is only a single impact to make the hole.
  • US-PS 19 09 366 and in DE 31 21 275 A1 it is also described that an additional impact effect can be provided when screwing, for example at the end of the screwing process, or that the screw-in torque increases the screw-in torque for larger screw-in resistances can be provided or switched on, but no hole is produced by impact.
  • DE 43 01 610 A1 and DE 42 36 819 A1 show an impact wrench with deactivation of the impact effect or a combined impact drill and impact wrench with deactivation of the impact effect, but with which it is not possible to form self-drilling or self-piercing and to set thread-forming or tapping screws.
  • This prior art is only concerned with activating an impact effect when drilling or screwing in screws. This impact can be switched off, but not for the transition to a subsequent thread forming or cutting process. From US-PS 40 30 383 it is also known to provide a depth stop for a screwdriver without a striking device, with which, as usual, the screwing-in movement is ended in good time.
  • the present invention has set itself the task of creating an attachment for a machine with which it is possible to set self-drilling or self-tapping and self-tapping or self-tapping screws.
  • two telescopically spring-loaded coupling elements that are slidably guided in the axial direction, but are constantly operatively connected to one another in the direction of rotation, wherein one coupling element can be coupled to the output axis of the machine and the other coupling element is the drive tool for a self-drilling or hole-forming and self-tapping or tapping screw or receives, and that an adjustable depth stop is arranged on the fixed part of the machine.
  • the device according to the invention is also particularly advantageous because the impact effect can be switched off immediately after a drill part or a hole-forming end section of the screw has completely penetrated and before the first thread engages in the bore or the hole.
  • the more precise and timely the changeover is made by a depth stop the more exact the seat of the screw that is then finally screwed in, since not only has an optimal bore or an optimal hole been produced, but also a particularly good mutual thread engagement between the workpiece and the the threaded shaft.
  • the coupling members are designed as a bolt and a sleeve which engage coaxially with one another. This ensures exact axis alignment with the output axis of the machine, so that practically no wobble movements occur during the drilling process and also during the subsequent thread forming process.
  • a helical spring is inserted between the coupling member following the output axis and the fixed part of the machine, the force of which is greater than the force of the coupling between the two used coil spring. This ensures that after the impact action has been switched off, it cannot be switched on again accidentally.
  • one of the coupling members has an elongated hole or a groove and the other coupling member has a bolt or other driver which engages in the elongated hole or the groove.
  • the coupling members for the mutually guided mounting in the axial direction and for the positive mounting in the rotating direction have a cross-sectional shape corresponding to one another.
  • a particularly simple shape can be seen, for example, in the fact that a square or hexagonal shape is provided for the coupling members.
  • a structurally simple configuration of the attachment is also given when the depth stop is designed as a tube part coaxially enclosing the coupling members.
  • the coupling members are covered to the outside, and, on the other hand, a large-area support of the depth stop is achieved.
  • the depth stop is formed by two telescopically displaceable tube parts which can be displaced in the axial direction and can be mutually fixed in a desired position. With a construction of the depth stop designed in this way, simple adjustability to adapt to various circumstances is of course also possible.
  • Figure 1 is a side view of a screw which is placed on a workpiece.
  • Fig. 5 shows a section through the coupling members fully extended in the axial direction.
  • a hole-forming and thread-forming screw 1 shown in FIGS. 1 to 3 is provided with a non-cutting hole-forming end section 2 which runs out to a tip or a tip-like shape. Furthermore, there is a shaft section 4 provided with a thread 3 and an engagement section 5 for attaching or inserting a tool.
  • a screw 1 was assumed, which is self-tapping and self-tapping. There is therefore a non-cutting hole-forming end section 2 and a corresponding thread 3.
  • the attachment described here can, however, be used for all other self-tapping and thread-forming screws, and, in addition, screws can be set in this way and with the device according to the invention, which are self-drilling and self-tapping. It does not matter whether the drilling process or the hole forming process or thread forming or cutting is carried out without cutting or machining. Experiments have shown that the attachment described here can also be used with particular success with self-tapping screws. It is irrelevant whether there is a drill tip made by forming or a corresponding drill bit at the free end of the screw.
  • screws can be made which are made entirely of stainless material.
  • an attempt is always made to produce at least the drill tip from a hardenable material in the case of an at least partially rustproof execution of screws in order to be able to apply the corresponding drilling performance. Therefore, expensive welding solutions for screws were always necessary.
  • the attachment described here has the effect that the rotary drive for the screw 1 during the hole-forming process remains connected to the impact effect which is usual in machines such as impact drills or rotary hammers, in the axial direction 6. In addition to the rotary movement 7, the screw is also subjected to the axial impact 6. In this way, a corresponding hole 8 can be formed in the workpiece 9 in a work time that has been considerably shorter than in the past.
  • a short thread-free shaft portion 11 can be connected to the end portion 2. As soon as the end section 2 has finished forming the hole in the workpiece 9, there is an axial relief, since the thread-free shaft section 11 suddenly sags down through the hole 8 due to the axial contact force still exerted.
  • the attachment 12 described here is used for attachment to a machine 13 equipped with an axial impact effect, such as an impact drill or a corresponding hammer drill.
  • an axially exerted impact effect is transmitted to the output axis with a corresponding axial load.
  • the attachment 2 consists essentially of two coupling members 14 and 15 and an adjustable depth stop 16.
  • the two coupling members 14, 15 are guided telescopically and spring-loaded to one another in the axial direction. In the direction of rotation, however, these coupling members 14 and 15 are in constant operative connection.
  • One coupling member 14 is connected to the output se 17 of the machine 13 can be coupled.
  • the other coupling member 15 receives the drive tool 18 for a screw 1 or is directly provided with such a drive tool 18.
  • the coupling member 14 is in the form of a sleeve, whereas the coupling member 15 is in the form of a bolt.
  • the two coupling members 14, 15 can thus engage in one another coaxially and are therefore also brought together accordingly in the axial direction.
  • the coupling member 15 has a groove 19 and the coupling member 14 has a bolt 20 which engages in this groove 19.
  • a limited axial displaceability between the two coupling members 14 and 15 is thus ensured, but there is a permanent operative connection for the rotation.
  • such a groove or a corresponding bolt can also be provided on the respective other coupling member 14 or 15, and it is also possible to provide an elongated hole in one of the coupling members 14, 15, into which a corresponding bolt is then provided intervenes.
  • the coupling members for the mutually guided mounting in the axial direction to correspond to one another in cross-section, in order to ensure the form-fitting mounting in the direction of rotation by means of a special cross-sectional shape.
  • the coupling members 14, 15 designed as bolts and sleeves could have a square, hexagonal or generally non-circular cross-section.
  • the coupling members 14, 15 each have a stop flange 21, 22 at the ends facing away from one another, a helical spring 23 being inserted between these two stop flanges 21, 22.
  • the two coupling members 14, 15 therefore always endeavor to move apart in the axial direction by the action of the helical spring 23. Therefore, when a screw 1 is inserted, there is always a corresponding, albeit low, contact pressure for the screw used, even if this contact pressure is so low that no axial impact is triggered on the machine 13.
  • Another coil spring 26 is inserted between the flange 21 of the coupling member 14 and the fixed part of the machine 13. This helical spring 26 is designed to be stronger than the helical spring 23.
  • the depth stop 16 is designed as a coupling part 14, 15 coaxially enclosing tubular part.
  • two telescopically displaceable tube parts 24, 25 are provided, which can be displaced relative to one another in the axial direction and can be mutually fixed in a desired position. An exact setting of the depth stop 16 is thus possible, since the two tube parts 24, 25 can only be pushed into one another axially and telescopically to the extent that it is desired to be preset.
  • the depth stop can be coupled to the corresponding head of the machine 13 in a simple manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

Un adaptateur (12) pour machines à percussion axiale, telles que des perceuses électriques à percussion (13), comprend deux éléments d'accouplement (14, 15) télescopiques sollicités par des ressorts dans le sens axial de façon à s'emboîter et à coopérer dans le sens de rotation. Un organe d'accouplement (14) est relié à l'axe mené (17) de la perceuse électrique à percussion (13) et l'autre organe d'accouplement (15) reçoit un outil (18) d'entraînement qui sert à enfoncer une vis (1) dans une pièce (9). Une butée (16) réglable de limitation de la profondeur est montée sur la partie fixe de la perceuse électrique à percussion (13). Cet adaptateur permet à la perceuse électrique à percussion (13) d'appliquer une force de percussion dans le sens axial afin d'aider à enfoncer une vis pendant l'étape de perçage. La butée (16) de limitation de la profondeur réduit sensiblement la force de compression axiale à la fin de l'étape de perçage, de sorte qu'un ressort hélicoïdal de compression (23) puisse appliquer la force axiale requise de taraudage. Cette force axiale minime ne déclenche plus l'application d'une force de percussion axiale par la perçeuse électrique à percussion (13).
PCT/EP1995/004996 1994-12-21 1995-12-18 Adaptateur pour machines a percussion axiale WO1996019321A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU43870/96A AU4387096A (en) 1994-12-21 1995-12-18 Adapter for axial percussion machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4445813A DE4445813C2 (de) 1994-12-21 1994-12-21 Vorsatz für eine mit axialer Schlagwirkung arbeitende Maschine
DEP4445813.4 1994-12-21

Publications (1)

Publication Number Publication Date
WO1996019321A1 true WO1996019321A1 (fr) 1996-06-27

Family

ID=6536597

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/004996 WO1996019321A1 (fr) 1994-12-21 1995-12-18 Adaptateur pour machines a percussion axiale

Country Status (3)

Country Link
AU (1) AU4387096A (fr)
DE (1) DE4445813C2 (fr)
WO (1) WO1996019321A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111975050A (zh) * 2019-05-24 2020-11-24 江苏叁陆零工具有限公司 一种新型高速钢麻花钻
CN110340651A (zh) * 2019-08-07 2019-10-18 李想 一种集中电路板自动连续锁丝装置
DE102021130761A1 (de) 2021-11-24 2023-05-25 Bayerische Motoren Werke Aktiengesellschaft Haltevorrichtung zur Anordnung eines Werkzeugs sowie Verwendung einer Haltevorrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252176A1 (fr) * 1973-11-28 1975-06-20 Plasser Bahnbaumasch Franz
DE3121275A1 (de) * 1981-05-29 1982-12-16 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zum motorischen eindrehen von schrauben
US4370906A (en) * 1980-05-05 1983-02-01 Resonant Technology Company Sequenced fastener installation system
EP0159764A2 (fr) * 1984-01-16 1985-10-30 Illinois Tool Works Inc. Une vis pour la fixation espacée d une plaque,par example une latte à un support
FR2566695A1 (fr) * 1984-06-30 1986-01-03 Bosch Gmbh Robert Tournevis dynamometrique electrique
EP0249659A2 (fr) * 1986-06-14 1987-12-23 Raimund Wilhelm Broche de vissage, appareil de vissage et leur procédé d'utilisation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1909366A (en) * 1932-05-05 1933-05-16 Charles A Koza Tool
GB1056699A (en) * 1964-07-08 1967-01-25 Gkn Screws Fasteners Ltd A tool for applying a self-piercing and self-threading screw to a workpiece
BE794484A (fr) * 1972-01-31 1973-05-16 Atlas Copco Ab Cle a percussion
US4030383A (en) * 1976-06-30 1977-06-21 John Bradley Wagner Nose piece for screwguns
DE3431630C2 (de) * 1984-08-29 1996-06-05 Kress Elektrik Gmbh & Co Elektrowerkzeug zum wahlweisen Bohren oder Schrauben
JP2558753Y2 (ja) * 1991-10-31 1998-01-14 株式会社マキタ 回転電動工具の動力伝達機構
DE4301610C2 (de) * 1993-01-22 1996-08-14 Bosch Gmbh Robert Schlagschrauber

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252176A1 (fr) * 1973-11-28 1975-06-20 Plasser Bahnbaumasch Franz
US4370906A (en) * 1980-05-05 1983-02-01 Resonant Technology Company Sequenced fastener installation system
DE3121275A1 (de) * 1981-05-29 1982-12-16 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zum motorischen eindrehen von schrauben
EP0159764A2 (fr) * 1984-01-16 1985-10-30 Illinois Tool Works Inc. Une vis pour la fixation espacée d une plaque,par example une latte à un support
FR2566695A1 (fr) * 1984-06-30 1986-01-03 Bosch Gmbh Robert Tournevis dynamometrique electrique
EP0249659A2 (fr) * 1986-06-14 1987-12-23 Raimund Wilhelm Broche de vissage, appareil de vissage et leur procédé d'utilisation

Also Published As

Publication number Publication date
DE4445813C2 (de) 1996-12-05
AU4387096A (en) 1996-07-10
DE4445813A1 (de) 1996-06-27

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