EP0129865A1 - Outil à percussion, notamment marteau perforateur - Google Patents

Outil à percussion, notamment marteau perforateur Download PDF

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Publication number
EP0129865A1
EP0129865A1 EP84107161A EP84107161A EP0129865A1 EP 0129865 A1 EP0129865 A1 EP 0129865A1 EP 84107161 A EP84107161 A EP 84107161A EP 84107161 A EP84107161 A EP 84107161A EP 0129865 A1 EP0129865 A1 EP 0129865A1
Authority
EP
European Patent Office
Prior art keywords
guide
sleeve
drive
cylinder sleeve
housing
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
EP84107161A
Other languages
German (de)
English (en)
Other versions
EP0129865B1 (fr
Inventor
Otto Bergler
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.)
Black and Decker Overseas GmbH
Original Assignee
Eugen Lutz and Co
Black and Decker Overseas 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 Eugen Lutz and Co, Black and Decker Overseas GmbH filed Critical Eugen Lutz and Co
Priority to AT84107161T priority Critical patent/ATE33780T1/de
Publication of EP0129865A1 publication Critical patent/EP0129865A1/fr
Application granted granted Critical
Publication of EP0129865B1 publication Critical patent/EP0129865B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18024—Rotary to reciprocating and rotary
    • Y10T74/18032—Rotary to reciprocating or rotary
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y10T74/18336—Wabbler type

Definitions

  • the invention relates to an impact tool, in particular a hammer drill, in which the impact action is exerted on the tool in that a firing pin which is operatively connected to a piston acts on the end of the tool, the piston being guided in a cylinder sleeve arranged axially with a rotary drive , in which a pressure triggering its movement is generated by a periodic axial reciprocating movement in front of the piston.
  • Hammer drills of this type are known (Hilti instruction manual hammer drill TE12, 1981).
  • an additional piston is moved back and forth in the cylinder sleeve via a connecting rod drive, which excites the piston connected to the firing pin to strike it.
  • the cylinder sleeve is mounted in a hollow drive spindle, via which the rotary movement necessary for drilling is communicated to the tool.
  • the disadvantage of these designs is that because of the necessity to drive both the drive spindle for the drilling tool and the percussion piston, two different drive designs are necessary, of which in particular the drive takes up a lot of space for generating the striking movement, so that the housing for accommodating such an arrangement must be relatively large and heavy.
  • the invention has for its object to propose a solution for the impact tools mentioned above, in particular for rotary hammers, which allows a space-saving arrangement of the drive for generating the reciprocating movement.
  • the invention consists in that the drive for the back and forth movement is designed as a wobble drive, the axis of rotation of which coincides with the axis of the rotary drive.
  • This configuration makes it possible to dispense with an additional drive mechanism provided outside the axis of the drive spindle in the case of rotary hammers of the type mentioned at the outset.
  • the result is an arrangement aligned on only one axis, which is very space-saving.
  • the wobble drive consists of a guide piece for a wobble arm which is arranged such that it can rotate in an axially displaceable manner and which is rotatably mounted on a guide path along an oblique to a normal plane to the axis of rotation and is articulated with its free end on a sleeve which forms the rotary drive.
  • the sleeve can also be designed as a drive bell mounted in the housing, which is attached to it in an axially aligned manner flexible shaft is driven.
  • the guide piece can be fixedly connected in a simple manner to the cylinder sleeve, which is guided in a rotationally fixed manner in a housing, the cylinder sleeve being able to be displaced in a simple manner in a guide sleeve, which in turn is seated firmly in the housing and with an axial positive fit cooperates with the cylinder sleeve.
  • This positive locking can be achieved in a manner known per se by means of a multi-part profile, but also by means of axially extending grooves with balls in between or with axially extending ribs which engage in corresponding grooves in the other part.
  • the sleeve forming the rotary drive for the wobble drive can be part of a hollow drive spindle for an impact drilling tool in which the cylinder sleeve is also displaceably mounted.
  • this guide pin can either be seated firmly in the housing and the guide piece is rotatably or rotatably guided on this guide pin, depending on the setting of a switching arrangement, so that the hammer drill can either be switched to impact drilling or only to drilling.
  • the switching arrangement can be implemented in different ways. For example, it would be conceivable to make the guide pin hollow and to use this hollow guide pin to trigger an expansion arrangement which can be actuated by an axially movable shift rod and which leads to a fixed or a loose connection between the guide piece and the guide pin.
  • a hammer drill is shown schematically, which is provided in a known manner with a handle 1 and has an electromotive drive 2 inside a housing, from which a drive shaft 3 leads to the parts to be driven and designed according to the invention.
  • the drive spindle 7 is therefore set in rotation via the drive shaft 3 and the gear 6 and transmits this rotation for driving a drilling tool, not shown, above the drilling head 8.
  • a firing pin 10 is guided in the drive spindle 7, the left piston-like end of which rests against the end of an inserted tool.
  • a firing pin 11 On the right end of the firing pin 10 acts a firing pin 11 which is fixedly connected to a piston 12 which in turn is axially displaceably guided in a cylinder sleeve 13 which in turn is guided in a cylindrical guide within the drive spindle 7.
  • the cylinder sleeve 13 has a flange-like base with a type of hub 13a, into which an extension 14a of a guide piece 14 is firmly inserted.
  • the guide piece 14 itself then has a spherical part on the cylindrical part 14a, on which a circumferential guideway 14b with a hemispherical cross section is arranged, in which the bearing balls 15 for a ring 16 run with an upwardly projecting wobble arm 16a.
  • the guide track 14b is provided obliquely to a plane arranged perpendicular to the axis 17, the axis 17 being the axis of rotation of the drive spindle 4, which in the exemplary embodiment coincides with the axis of the piston 1.2, the cylinder sleeve 13 and the guide piece 14.
  • the guide piece 14 is the guide piece 14 axially displaceable on a guide pin 18 which is also aligned coaxially to the axis 17.
  • the guide piece 14 is secured against rotation relative to the guide pin 18 in that the guide pin 18 is guided with a longitudinal groove 18a and the guide piece 14 is guided with a ball 19 running largely without play therein.
  • the guide pin 18 itself is held aligned in a clamping device 20 with respect to the axis 17, which axially secures the guide pin and the guide piece 14 in the housing and, depending on a switching device, not shown, secures the guide pin 18 against rotation or releases it for rotation. The importance of this configuration is still discussed.
  • the wobble arm 16a of the ring 16 is articulated in a recess 7a of the drive spindle 7, which is therefore a drive sleeve represents for this wobble arm 16a.
  • the drive spindle 7 or the like in the usual way via ball bearings 21. is held in the housing 4, which in turn takes over the leadership of the other parts displaceable in it by appropriate fits.
  • the drive shaft 3 is also mounted in the housing 4 via ball bearings 22 or via a slide bearing 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling Tools (AREA)
  • Drilling And Boring (AREA)
EP84107161A 1983-06-25 1984-06-22 Outil à percussion, notamment marteau perforateur Expired EP0129865B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84107161T ATE33780T1 (de) 1983-06-25 1984-06-22 Schlagwerkzeug, insbesondere bohrhammer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3322964A DE3322964A1 (de) 1983-06-25 1983-06-25 Schlagwerkzeug, insbesondere bohrhammer
DE3322964 1983-06-25

Publications (2)

Publication Number Publication Date
EP0129865A1 true EP0129865A1 (fr) 1985-01-02
EP0129865B1 EP0129865B1 (fr) 1988-04-27

Family

ID=6202414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107161A Expired EP0129865B1 (fr) 1983-06-25 1984-06-22 Outil à percussion, notamment marteau perforateur

Country Status (4)

Country Link
US (1) US4612999A (fr)
EP (1) EP0129865B1 (fr)
AT (1) ATE33780T1 (fr)
DE (2) DE3322964A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011000653A1 (fr) * 2009-07-03 2011-01-06 Robert Bosch Gmbh Machine-outil portative

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3504650C2 (de) * 1985-02-12 1994-01-20 Bosch Gmbh Robert Bohrhammer mit Verstärkung der Betätigungskraft für die Kupplung des Schlagantriebes
US4994004A (en) * 1988-11-30 1991-02-19 Stirling Thermal Motors, Inc. Electric actuator for swashplate
DE4207295A1 (de) * 1992-03-07 1993-09-09 Black & Decker Inc Bohrhammer
US5664634A (en) * 1995-10-23 1997-09-09 Waxing Corporation Of America, Inc. Power tool
US5823906A (en) * 1997-01-02 1998-10-20 Vanderbilt University Nutation motion generator
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
EP2409667B1 (fr) * 2010-07-22 2015-06-17 Braun GmbH Appareil électrique pour utilisation personnelle
DE102012221748A1 (de) * 2012-11-28 2014-05-28 Robert Bosch Gmbh Handwerkzeugmaschine
CN110153959A (zh) * 2018-02-14 2019-08-23 苏州宝时得电动工具有限公司 手持工具
US11826891B2 (en) * 2019-10-21 2023-11-28 Makita Corporation Power tool having hammer mechanism

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH563845A5 (en) * 1974-01-23 1975-07-15 Marto Ag Rotary impact boring machine - has free piston reciprocating in cylinder and rotating drive shaft with electric motor power
CH588632A5 (en) * 1975-03-04 1977-06-15 Bosch Gmbh Robert Impact drill with swashplate - has spring loaded pneumatic impact piston reciprocating inside tool drive sleeve
DE2738057A1 (de) * 1977-06-29 1979-02-15 Bosch Gmbh Robert Handwerkzeugmaschine
DE3106487A1 (de) * 1981-02-21 1982-09-09 Robert Bosch Gmbh, 7000 Stuttgart Bohr- und schlaghammer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1901981A (en) * 1931-01-12 1933-03-21 Ragnar Erfass Motor-driven mechanical hammer
US2024684A (en) * 1934-07-23 1935-12-17 Erfass Karl Axel Ragnar Motor-driven hammer
US2491624A (en) * 1945-03-29 1949-12-20 Keller Tool Co Tool operating mechanism
US2601788A (en) * 1950-02-01 1952-07-01 P & L Products Inc Hand tool drive
DE848589C (de) * 1950-10-19 1952-09-04 Licentia Gmbh Vorsatzgetriebe
DE2449191C2 (de) * 1974-10-16 1988-03-24 Robert Bosch Gmbh, 7000 Stuttgart Hammer
DE2820128A1 (de) * 1978-05-09 1979-11-22 Bosch Gmbh Robert Handwerkzeugmaschine
DE3039669A1 (de) * 1980-10-21 1982-05-27 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3241528C2 (de) * 1982-11-10 1986-04-10 Eugen Lutz GmbH u. Co Maschinenfabrik, 7130 Mühlacker Werkzeugspannfutter für einen Bohrhammer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH563845A5 (en) * 1974-01-23 1975-07-15 Marto Ag Rotary impact boring machine - has free piston reciprocating in cylinder and rotating drive shaft with electric motor power
CH588632A5 (en) * 1975-03-04 1977-06-15 Bosch Gmbh Robert Impact drill with swashplate - has spring loaded pneumatic impact piston reciprocating inside tool drive sleeve
DE2738057A1 (de) * 1977-06-29 1979-02-15 Bosch Gmbh Robert Handwerkzeugmaschine
DE3106487A1 (de) * 1981-02-21 1982-09-09 Robert Bosch Gmbh, 7000 Stuttgart Bohr- und schlaghammer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011000653A1 (fr) * 2009-07-03 2011-01-06 Robert Bosch Gmbh Machine-outil portative
CN102470522A (zh) * 2009-07-03 2012-05-23 罗伯特·博世有限公司 手持式工具机
CN102470522B (zh) * 2009-07-03 2015-08-19 罗伯特·博世有限公司 手持式工具机
US9211639B2 (en) 2009-07-03 2015-12-15 Robert Bosch Gmbh Hand-held power tool

Also Published As

Publication number Publication date
US4612999A (en) 1986-09-23
EP0129865B1 (fr) 1988-04-27
ATE33780T1 (de) 1988-05-15
DE3322964A1 (de) 1985-01-24
DE3322964C2 (fr) 1987-07-09
DE3470679D1 (en) 1988-06-01

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