EP1391269A3 - Hand tool, especially screwdriver - Google Patents

Hand tool, especially screwdriver Download PDF

Info

Publication number
EP1391269A3
EP1391269A3 EP03013591A EP03013591A EP1391269A3 EP 1391269 A3 EP1391269 A3 EP 1391269A3 EP 03013591 A EP03013591 A EP 03013591A EP 03013591 A EP03013591 A EP 03013591A EP 1391269 A3 EP1391269 A3 EP 1391269A3
Authority
EP
European Patent Office
Prior art keywords
ring gear
ring
inclined surface
gear
balls
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.)
Granted
Application number
EP03013591A
Other languages
German (de)
French (fr)
Other versions
EP1391269B1 (en
EP1391269A2 (en
Inventor
Bernd Fleischmann
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.)
Festool GmbH
Original Assignee
Festool GmbH
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 Festool GmbH filed Critical Festool GmbH
Publication of EP1391269A2 publication Critical patent/EP1391269A2/en
Publication of EP1391269A3 publication Critical patent/EP1391269A3/en
Application granted granted Critical
Publication of EP1391269B1 publication Critical patent/EP1391269B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/141—Mechanical overload release couplings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Retarders (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

Eine Handwerkzeugmaschine weist eine Umlaufgetriebestufe mit einer Getrieberadanordnung auf, die sich am Innenzahnkranz (7) eines Hohlrades (8) abwälzt. Dem Hohlrad (8) ist eine Sicherungseinrichtung zugeordnet, die in einem das Hohlrad (8) umschließenden Lagerring (13) gelagerte Rastkugeln (15) aufweist, die durch Federkraft in Verrastungseingriff mit dem Hohlrad (8) gehalten werden. Beim Erreichen eines Abschalt-Drehmoments werden die Rastkugeln (15) vom Hohlrad (8) nach außen verdrängt, so dass sich das Hohlrad (8) verdrehen kann. Der Lagerring (13) wird von einem in axialer Richtung bewegbaren Stützring (19) umschlossen, der durch die Federkraft in axialer Richtung belastet und über eine Schrägflächenanordnung (20) gegen die Rastkugeln (15) gehalten wird. Der Stützring (19) ist von außen her verdrehbar. Die Schrägflächenanordnung (20) wird von über den Umfang verteilten, jeweils einer Rastkugel (15) zugeordneten und sich in Umfangsrichtung erstreckenden Schrägflächenbereichen (21) gebildet, innerhalb von denen sich die Schrägflächensteigung verändert. Je nach der Drehlage des Stützrings (19) liegen die Schrägflächenbereiche (21) mit anderer Steigung an den Rastkugeln (15) an, so dass sich das Abschalt-Drehmoment verstellen lässt.

Figure imgaf001
A hand tool has an epicyclic gear stage with a gear wheel arrangement, which rolls on the inner ring gear (7) of a ring gear (8). The ring gear (8) is associated with a safety device which in a the ring gear (8) enclosing bearing ring (13) mounted detent balls (15) which are held by spring force in latching engagement with the ring gear (8). Upon reaching a turn-off torque, the locking balls (15) from the ring gear (8) displaced to the outside, so that the ring gear (8) can rotate. The bearing ring (13) is enclosed by a support ring (19), which can be moved in the axial direction, which is loaded by the spring force in the axial direction and held against the detent balls (15) via an inclined surface arrangement (20). The support ring (19) is rotatable from the outside. The oblique surface arrangement (20) is formed by circumferentially distributed, in each case one latching ball (15) associated and extending in the circumferential direction inclined surface regions (21), within which the inclined surface slope changes. Depending on the rotational position of the support ring (19) are the inclined surface areas (21) with a different pitch on the locking balls (15), so that the turn-off torque can be adjusted.
Figure imgaf001
EP20030013591 2002-08-21 2003-06-14 Hand tool, especially screwdriver Expired - Lifetime EP1391269B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10239483 2002-08-21
DE2002139483 DE10239483B3 (en) 2002-08-21 2002-08-21 Hand tool, for example screwdriver

Publications (3)

Publication Number Publication Date
EP1391269A2 EP1391269A2 (en) 2004-02-25
EP1391269A3 true EP1391269A3 (en) 2006-05-10
EP1391269B1 EP1391269B1 (en) 2007-03-14

Family

ID=30775569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030013591 Expired - Lifetime EP1391269B1 (en) 2002-08-21 2003-06-14 Hand tool, especially screwdriver

Country Status (2)

Country Link
EP (1) EP1391269B1 (en)
DE (2) DE10239483B3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1787757B1 (en) 2005-11-18 2008-05-28 Metabowerke GmbH Electric motor driven screwdriver or drill with planetary gear train
CN101396811B (en) * 2007-09-28 2012-04-25 苏州宝时得电动工具有限公司 Power tool
CN102748443B (en) * 2012-06-01 2015-08-26 李飞宇 Overload protection device of planetary gear

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448098A (en) * 1982-03-10 1984-05-15 Katsuyuki Totsu Electrically driven screw-driver
DE3636301A1 (en) * 1986-10-24 1988-04-28 Steinel Gmbh & Co Kg Hand tool

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1860599U (en) * 1962-08-10 1962-10-18 Metabowerke Kg ELECTRIC POWERED SCREW TOOL.
DE2409815A1 (en) * 1974-03-01 1975-09-11 Bosch Gmbh Robert POWER DRIVER WITH SHUT-OFF DEVICE
NL9101335A (en) * 1991-08-02 1993-03-01 Emerson Electric Co TRANSMISSION FOR ELECTRICALLY POWERED TOOLS.
US5897454A (en) * 1996-01-31 1999-04-27 Black & Decker Inc. Automatic variable transmission for power tool
DE19902187A1 (en) * 1998-03-04 1999-09-16 Scintilla Ag Planetary gearing for use with hand tools e.g. electric screwdrivers etc.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448098A (en) * 1982-03-10 1984-05-15 Katsuyuki Totsu Electrically driven screw-driver
DE3636301A1 (en) * 1986-10-24 1988-04-28 Steinel Gmbh & Co Kg Hand tool

Also Published As

Publication number Publication date
DE50306785D1 (en) 2007-04-26
DE10239483B3 (en) 2004-03-04
EP1391269B1 (en) 2007-03-14
EP1391269A2 (en) 2004-02-25

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