EP0375917A1 - Perceuse - Google Patents

Perceuse Download PDF

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Publication number
EP0375917A1
EP0375917A1 EP19890121362 EP89121362A EP0375917A1 EP 0375917 A1 EP0375917 A1 EP 0375917A1 EP 19890121362 EP19890121362 EP 19890121362 EP 89121362 A EP89121362 A EP 89121362A EP 0375917 A1 EP0375917 A1 EP 0375917A1
Authority
EP
European Patent Office
Prior art keywords
drilling machine
machine according
locking
gear
coupling part
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
EP19890121362
Other languages
German (de)
English (en)
Other versions
EP0375917B1 (fr
Inventor
Manfred Bleicher
Ulrich Dipl.-Ing.(Fh) Bohne
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0375917A1 publication Critical patent/EP0375917A1/fr
Application granted granted Critical
Publication of EP0375917B1 publication Critical patent/EP0375917B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003—Clutches specially adapted therefor

Definitions

  • the invention is based on a drilling machine according to the preamble of claim 1.
  • a safety clutch for hand-held power tools such as rotary hammers is already known, which, in addition to the two coupling elements, has a large number of further individual parts, such as cage, washers and bushings has, so that the entire coupling is complicated in construction and complex to assemble. If the coupling wears, both coupling halves must be replaced.
  • the drilling machine according to the invention with the characterizing features of claim 1 has the advantage that it has a wear-resistant and easy-to-assemble safety coupling with a part-saving construction.
  • the design of the locking members causes friction, namely rolling friction, to occur only on one of the two coupling parts, namely on the more wear-resistant mating coupling part.
  • the gear does not wear out due to the clutch, even if it is made of a softer material such as sintered metal.
  • Figure 1 shows a cross section through a drilling machine according to the invention.
  • the drill 1 has in its housing 2 a motor, not shown, which drives an intermediate shaft 3.
  • a toothed wheel 5 engages in the toothing 4 of the intermediate shaft 3 with its spur toothing 6.
  • the gear wheel 5 has locking recesses 8. These are so deep that latching bodies 9 mounted therein preferably immerse at least halfway.
  • the locking bodies 9 are arranged as rollers with their axis to the gear 5 in the radial direction. Accordingly, the locking recesses 8 have a cylindrical jacket shape.
  • the gear wheel 5 is under the action of a compression spring 10, which is supported against a disk 13 fastened in a drive member 12.
  • the drive member 12 is designed as a rotating sleeve, which has a counter coupling part 14 on a collar, which is provided on its side facing away from the handle 2 with locking recesses 15.
  • tubular drive member 12 here is a z. B. housed in DE 31 21 616 A1 described percussion mechanism 16 with reciprocating piston 17.
  • the drive member 12 continues into the tool holder 18, where inward driving bars 19 are arranged which engage in rotary driving grooves 20 of the tool 21.
  • the tool holder corresponds to the known designs z. B. according to DE 25 51 125 C2 (US-A 41 07 949).
  • the locking rollers 9 can rotate in the locking recesses 8 about their own axis and roll on the mating coupling part 14 from the locking troughs 15. No wear can occur on the gear 5, so that a less wear-resistant material, such as, for. B. sintered metal can be used.
  • the cogging torque can be increased in that the recesses 15 are cut deeper or the side walls of the recesses 15 are steep. The flatter the notches, the earlier the safety clutch responds.
  • the invention is not limited to the arrangement of a safety clutch at the point shown in the exemplary embodiment. Rather, the clutch can be arranged at any point in the rotary drive train. Any tool holders, in particular drill chucks, can also be used. In this case, the chuck jaws are rotatably connected to the drive member 12.
EP89121362A 1988-12-30 1989-11-18 Perceuse Expired - Lifetime EP0375917B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3844311A DE3844311A1 (de) 1988-12-30 1988-12-30 Bohrmaschine
DE3844311 1988-12-30

Publications (2)

Publication Number Publication Date
EP0375917A1 true EP0375917A1 (fr) 1990-07-04
EP0375917B1 EP0375917B1 (fr) 1993-02-10

Family

ID=6370519

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89121362A Expired - Lifetime EP0375917B1 (fr) 1988-12-30 1989-11-18 Perceuse

Country Status (3)

Country Link
EP (1) EP0375917B1 (fr)
JP (1) JPH02212006A (fr)
DE (2) DE3844311A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1371458A1 (fr) * 2002-06-11 2003-12-17 Black & Decker Inc. Perceuse à percussion avec embrayage limiteur de couple
WO2006034899A1 (fr) * 2004-09-30 2006-04-06 Robert Bosch Gmbh Machine-outil a main notamment marteau perforateur et/ou percuteur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4302083A1 (de) * 1993-01-19 1994-07-21 Black & Decker Inc Kraftgetriebenes Werkzeug, insbesondere Elektrowerkzeug
DE19717465B4 (de) * 1997-04-25 2005-08-04 Robert Bosch Gmbh Elektrowerkzeugmaschine
DE19903863A1 (de) * 1999-02-01 2000-08-24 Bosch Gmbh Robert Sicherheitskupplung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE424341C (de) * 1926-01-26 Automat Ind Ges M B H Bohr- und Gewindeschneidvorrichtung mit UEberlastungskupplung
US4294340A (en) * 1978-12-09 1981-10-13 Jean Walterscheid Gmbh Overload clutch
DE8003571U1 (de) * 1980-02-11 1981-12-10 Hilti AG, 9494 Schaan Ueberlastkupplung zum uebertragen eines begrenzten drehmomentes
US4373923A (en) * 1979-12-14 1983-02-15 Umc Industries Inc. Torque limiting overload coupling
US4593800A (en) * 1983-02-22 1986-06-10 Helland Research & Engineering, Inc. Torque release drive connector
DE3503507A1 (de) * 1985-02-02 1986-08-07 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE424341C (de) * 1926-01-26 Automat Ind Ges M B H Bohr- und Gewindeschneidvorrichtung mit UEberlastungskupplung
US4294340A (en) * 1978-12-09 1981-10-13 Jean Walterscheid Gmbh Overload clutch
US4373923A (en) * 1979-12-14 1983-02-15 Umc Industries Inc. Torque limiting overload coupling
DE8003571U1 (de) * 1980-02-11 1981-12-10 Hilti AG, 9494 Schaan Ueberlastkupplung zum uebertragen eines begrenzten drehmomentes
US4593800A (en) * 1983-02-22 1986-06-10 Helland Research & Engineering, Inc. Torque release drive connector
DE3503507A1 (de) * 1985-02-02 1986-08-07 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1371458A1 (fr) * 2002-06-11 2003-12-17 Black & Decker Inc. Perceuse à percussion avec embrayage limiteur de couple
US7051820B2 (en) 2002-06-11 2006-05-30 Black & Decker Inc. Rotary hammer
CN100339190C (zh) * 2002-06-11 2007-09-26 布莱克-德克尔公司 旋转锤子
WO2006034899A1 (fr) * 2004-09-30 2006-04-06 Robert Bosch Gmbh Machine-outil a main notamment marteau perforateur et/ou percuteur

Also Published As

Publication number Publication date
EP0375917B1 (fr) 1993-02-10
DE3844311A1 (de) 1990-07-05
DE58903533D1 (de) 1993-03-25
JPH02212006A (ja) 1990-08-23

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