EP2055433A2 - Utilisation d'un tournevis - Google Patents

Utilisation d'un tournevis Download PDF

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Publication number
EP2055433A2
EP2055433A2 EP08019149A EP08019149A EP2055433A2 EP 2055433 A2 EP2055433 A2 EP 2055433A2 EP 08019149 A EP08019149 A EP 08019149A EP 08019149 A EP08019149 A EP 08019149A EP 2055433 A2 EP2055433 A2 EP 2055433A2
Authority
EP
European Patent Office
Prior art keywords
screwdriver
screwdriver bit
zone
torsion shaft
torsion
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Withdrawn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
EP08019149A
Other languages
German (de)
English (en)
Other versions
EP2055433A3 (fr
Inventor
Peter Wang
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.)
Compass Corp
Original Assignee
Compass Corp
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 Compass Corp filed Critical Compass Corp
Publication of EP2055433A2 publication Critical patent/EP2055433A2/fr
Publication of EP2055433A3 publication Critical patent/EP2055433A3/fr
Withdrawn legal-status Critical Current

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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
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit

Definitions

  • the present invention relates to a screwdriver bit according to the preamble of the main claim.
  • Such screwdriver bits are referred to as bits and are known from everyday life.
  • the screwdriver tips have a cross-sectional profile which fits into a correspondingly profiled screw slot.
  • Torsionsschaft which serves the purpose of transmitting the torque to be transmitted during the screwing operation of the drive shaft to the screwdriver tip and on the other hand also intercept the torque peaks occurring.
  • the torsion shafts designed for torsion are dimensioned so that only one elastic Deformation takes place and any slight plastic deformation is avoided.
  • the known tool inserts with a torsion shaft between the drive end and screwdriver tip is the interception of torque peaks in common.
  • the advantage of the invention is that the torsion shaft can deform in the event of torque peaks occurring along the helical drill zone in such a way that it also abruptly becomes shorter or shorter in a microscopically small circumference.
  • the drill zone can consist, for example, of an uncured, spirally revolving zone of the torsion shaft.
  • it is a recess on the torsion shaft, which is preferably concave rounded to its bottom.
  • the drill zone can be guided completely around the torsion shaft at least once or several times.
  • the number of turns determines the axial extension experienced by the torsion shaft at the torque peaks occurring.
  • the helical drill zone terminate at its two ends in each case in a normal plane.
  • Such a normal plane is perpendicular to the longitudinal axis of the screwdriver bit and is preferably provided at the two ends of the torsion.
  • the depth of the recess to the end / to its two ends decreases or increases respectively.
  • the optimal shape can be determined in particular by experiment.
  • winding direction of the drill zone can be S- or Z-shaped.
  • the winding direction thus specifies in which direction of rotation the screwdriver bit offers the effect according to the invention.
  • the screwdriver bit 1 has a drive end 2, a screwdriver end 4 and a torsion shaft 6 arranged therebetween.
  • the drive end 2 has - here - a polygonal drive shaft 3, by means of which the screwdriver bit can be inserted into a corresponding tool chuck.
  • the screwdriver bit 1 is rotated in a predetermined direction.
  • screwdriver bits are basically suitable and usable for both directions of rotation.
  • the drill zone consists of a smaller diameter core zone of the torsion shaft. 6
  • the torsion shaft 6 consequently has a larger outer diameter, with the result that it experiences a smaller infinitesimal torsion there than in the drill zone 9.
  • the drill zone 9 on the one hand helical and the larger diameter portions of the torsion shaft 6 are also formed helically, it can come in the torsion of the torsion 6 depending on the respective direction of rotation at the drive end 2 to an infinitesimal extension of the torsion 6.
  • the drill zone 9 can run completely around the torsion shaft 6 at least once.
  • the drill zone 9 is designed as a recess 11 with a concave rounded profile cross-section.
  • the concave fillet in any case ensures the avoidance of unnecessary stress peaks in the material, so that such a screwdriver bit can always be operated in the elastic range even with a small cross-section of the drill zone 9.
  • the figures show recesses 11, the depth of which 12 decreases towards the respective ends, in particular runs to zero.
  • This measure also serves to avoid unnecessary stresses in the workpiece and promotes the idea of small shank diameters in the area of the drill zone 9.
  • FIG. 1 A comparison of Figures 1 and 2 shows, moreover, that the winding direction of the drill zone 9 can once be S-shaped 13 and in contrast to the Z-shaped 14 thereto.
  • FIG. 2 it is a Z-shaped drill zone 9, in which it can be expected that the elongation effect according to the invention takes place in the region of the torsion shaft 6 when the screwdriver bit is rotated clockwise.
  • such a screwdriver bit would be particularly suitable either for left-hand threads or for unscrewing stuck screws with right-hand thread.
  • the figures show an embodiment in which the torsion shaft 6 is of a straight cylindrical shape and has a smaller cross section than the drive shaft 3.
  • the pitch angle 15 be approximately 45 ° in the drill zone 9.
  • the pitch angle 15 can also increase or decrease in one direction or, starting from the middle of the torsion shaft 6 in both directions, in order to bring about the pressure boosting effect according to the invention in the 1/10, 1/100 or millisecond range.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP08019149A 2007-11-02 2008-10-31 Utilisation d'un tournevis Withdrawn EP2055433A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710052772 DE102007052772A1 (de) 2007-11-02 2007-11-02 Schraubendrehereinsatz

Publications (2)

Publication Number Publication Date
EP2055433A2 true EP2055433A2 (fr) 2009-05-06
EP2055433A3 EP2055433A3 (fr) 2010-09-08

Family

ID=40297788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08019149A Withdrawn EP2055433A3 (fr) 2007-11-02 2008-10-31 Utilisation d'un tournevis

Country Status (2)

Country Link
EP (1) EP2055433A3 (fr)
DE (1) DE102007052772A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8955418B2 (en) 2013-03-08 2015-02-17 Black & Decker Inc. Threaded fastener driving tool
CN104552113A (zh) * 2013-10-29 2015-04-29 昆山义成工具有限公司 耐冲击变形起子头
EP2754534A3 (fr) * 2013-01-10 2018-02-28 HILTI Aktiengesellschaft Tige de torsion
US20180147703A1 (en) * 2016-11-30 2018-05-31 Yi-feng Liu Screwdriver with rotating lever

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5544136A (en) * 1978-09-20 1980-03-28 Yutani Tekko Kk Torsion bar
DE4243608C2 (de) * 1992-12-22 2000-10-19 Werner Hermann Wera Werke Werkzeug
DE69415348T2 (de) * 1994-01-26 1999-04-29 Vermont American Corp., Louisville, Ky. Schraubendreheinsatz für den gebrauch mit einem elektrischen schraubenzieher
DE10026205A1 (de) * 2000-05-26 2001-11-29 Adolf Wuerth Gmbh & Co Kg Vorrichtung zum Verbinden eines Werkzeugs mit einem Antrieb
DE20207137U1 (de) * 2002-05-06 2002-07-25 Lin, Shyh-Jye, Tai-Li, Taichung Motorisch betätigbare Schraubenzieherklinge
EP2018919A1 (fr) * 2007-07-27 2009-01-28 Joker Industrial Co., Ltd. Mèche tournevis

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2754534A3 (fr) * 2013-01-10 2018-02-28 HILTI Aktiengesellschaft Tige de torsion
US8955418B2 (en) 2013-03-08 2015-02-17 Black & Decker Inc. Threaded fastener driving tool
CN104552113A (zh) * 2013-10-29 2015-04-29 昆山义成工具有限公司 耐冲击变形起子头
US20180147703A1 (en) * 2016-11-30 2018-05-31 Yi-feng Liu Screwdriver with rotating lever

Also Published As

Publication number Publication date
EP2055433A3 (fr) 2010-09-08
DE102007052772A1 (de) 2009-05-07

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