EP2043821A1 - Outil électroportatif muni d'un groupe de percussion - Google Patents

Outil électroportatif muni d'un groupe de percussion

Info

Publication number
EP2043821A1
EP2043821A1 EP07729030A EP07729030A EP2043821A1 EP 2043821 A1 EP2043821 A1 EP 2043821A1 EP 07729030 A EP07729030 A EP 07729030A EP 07729030 A EP07729030 A EP 07729030A EP 2043821 A1 EP2043821 A1 EP 2043821A1
Authority
EP
European Patent Office
Prior art keywords
piston
hand tool
wobble
bearing
swash
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Withdrawn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
EP07729030A
Other languages
German (de)
English (en)
Inventor
Gerhard Meixner
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 EP2043821A1 publication Critical patent/EP2043821A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/331—Use of bearings

Definitions

  • the invention is based on a hand tool with a percussion unit according to the preamble of claim 1.
  • the invention is based on a hand-held power tool, in particular a drill and / or chisel hammer, with a percussion unit, which comprises a swash bearing unit with a wobble body and a piston.
  • a percussion unit which comprises a swash bearing unit with a wobble body and a piston.
  • the handheld power tool has at least two and preferably at least three bearing points connected in parallel in the power flow, via which the pebble body is coupled to the piston or which are intended to transmit a drive movement from the wobble body to the piston.
  • a "percussion unit” should be understood to mean, in particular, a unit which is intended to convert a rotational movement into a translatory stroke movement.
  • a “swash-bearing unit” is to be understood in particular as meaning a unit in which, due to a tumbling body mounted obliquely on a bearing means, a tumbling movement of the swash body occurs during a rotation of the bearing means. Furthermore, under a “parallel arrangement in the power flow", in particular a
  • a force to be transmitted is divided on the bearings.
  • various required compensating movements and / or occurring driving forces can advantageously be distributed over a plurality of bearing points, and the bearings forming the bearing points can be dimensioned to be weaker compared to a single bearing and can be integrated into a housing unit in a particularly flexible and space-saving manner.
  • the wobble body can be coupled directly to the piston or preferably via intermediate components with the piston.
  • a reduced overall length can be achieved if at least one bearing point is arranged next to the piston. If at least two bearing points are arranged next to the piston, an advantageous one can also be at least largely possible symmetrical application of force can be realized. It should be understood by “next" both above the piston, below the piston and in particular laterally next to the piston.
  • the swash-bearing unit has a swivel body coupled to the swash body.
  • a "swivel body” is to be understood as meaning, in particular, a body which is pivotably mounted about a pivot axis and can preferably execute a relative movement to the swash body.
  • the pivoting body is coupled via at least two bearing points with the piston and / or two bearing points with the wobble body, again preferably in each case parallel in the power flow bearings, whereby an advantageous power transmission can be achieved with space-saving dimensionable bearings.
  • the swivel body can be coupled directly or indirectly via other components with the piston and / or the swash body.
  • the swivel body has at least one, preferably at least two, at least partially laterally guided arms on the piston and / or at least one, preferably at least two laterally guided at least partially on the swash body arms, whereby toli rather space can be used advantageously and length can be saved.
  • the wobble body has at least two wobble fingers, bearing points arranged in a structurally simple and space-saving manner in the force flow can be realized, via which a driving force can be transferred from the wobble body to another component, for example to the piston directly or advantageously to a pivoting body.
  • Fig. 2 parts of a percussion unit of the power tool of Figure 1 in a side view
  • FIG. 3 shows the individual parts of the hammer mechanism unit according to FIG. 2 in a front view. Description of the embodiment
  • FIG. 1 shows a hand-held power tool formed by a hammer drill in a side view.
  • the portable power tool has a housing 40 and a percussion unit 10 arranged in the housing 40, which comprises a swash bearing unit 12 with a swash body 14 and a piston 16 which is translationally guided in a hammer tube 42 (FIGS. 1 and 2).
  • the wobble body 14 is mounted via a roller bearing 44 obliquely on a bearing means 46 which is rotatably mounted on a parallel to the hammer tube 42 and to a striking axis 48 extending shaft 50 ( Figures 2 and 3).
  • the shaft 50 is coupled via a gear transmission 52 formed by an angle gear with a motor shaft 54 of an electric motor 56 of the power tool.
  • the gear transmission 52 has a rotatably mounted on the shaft 50 arranged first bevel gear 58, which meshes with a via a shaft 60 on one side mounted second bevel gear 62.
  • the second bevel gear 62 in turn meshes with a third bevel gear 64 rotatably mounted on the motor shaft 54.
  • the hand tool machine has a so-called L construction, in which the motor shaft 54 or a rotation axis thereof and the striking axis 48 form an angle 66 of 90 ° include.
  • the solution according to the invention is also applicable to other designs which appear meaningful to a person skilled in the art, in particular also in the case of designs in which a motor shaft is aligned parallel to a striking axis.
  • the handheld power tool has in each case two bearing points 18, 20, 22, 24 which are connected in parallel in the power flow and via which the wobble body 14 is coupled to the piston 16.
  • the swash bearing unit 12 has a swivel body 26 coupled directly to the swash body 14.
  • the swivel body 26 has two arms 32, 34 guided laterally past the swash body 14 and is on a side facing away from the piston 16 with transverse webs 68, 70 via the bearing 18 with a first wobble finger radially projecting from a base body of the swash body 14 36 of the wobble body 14 coupled.
  • the wobble finger 36 is connected via a screw 84 with a main body 86 of the dummy body 14 and can be unscrewed for assembly and disassembly of the main body 86 of the wobble body 14.
  • other components are multi-part executable to allow an advantageous assembly and disassembly.
  • the pivoting body 26 On a side facing the piston 16, the pivoting body 26 with two further transverse webs 72, 74 via the arranged parallel to the bearing 18 in the power flow bearing 20 with a second, integrally formed on the main body 86 of the wobble body 14 and radially projecting from this tumble finger 38 of the wobble body 14 coupled.
  • the swivel body 26 has two arms 28, 30, which are guided partly laterally past the piston 16, via which the swivel body 26 via the two bearing points 22, 24 arranged laterally next to the piston 16 with one through the piston 16 guided transverse pin 76 and is coupled via the transverse pin 76 via a bearing 78 with the piston 16.
  • the bearings 22, 24 are in turn arranged in parallel in the force flow, so that a to be transferred to the piston 16 to be transmitted driving force during operation on the two bearings 22, 24.
  • the transverse pin 76 is advantageously fixedly arranged in the piston 16, and the pivoting body 26 is pivotally mounted on the transverse pin 76 via the bearing points 22, 24. In principle, however, could also be the transverse pin 76 in the piston 16 pivotally and the pivot body 26 fixedly connected to the transverse pin 76.
  • the shaft 50 is driven by means of the electric motor 56 via the gear wheel gear 52 and the bearing means 46 is driven in rotation via the shaft 50.
  • the rotational movement of the bearing means 46 leads to a tumbling motion of the wobble body 14, which drives the pivoting body 26 via its wobble fingers 36, 38 with a pivoting movement about a pivot axis 80 concentric with the transverse pin 76.
  • the pivoting movement of the pivoting body 26 in turn leads to a translational reciprocating movement of the piston 16.
  • the pivot axis 80 moves thereby always on the striking axis 48.
  • the wobble fingers 36, 38 are movable in the circumferential direction and in the longitudinal direction in the bearings 18, 20 stored, so that during operation the wobble fingers 36, 38 can pivot within the bearing points 18, 20 about their longitudinal axes relative to the pivot body 26 and the pivot body 26 in the longitudinal direction of the wobble fingers 36, 38 relative to the same move and in particular a height difference 82 can be compensated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne un outil électroportatif, notamment un marteau perforateur et/ou burineur, comprenant un groupe (10) de percussion qui comprend une unité (12) de palier d'oscillation munie d'un corps (14) oscillant ainsi qu'un piston (16). Il est prévu selon l'invention que l'outil électroportatif présente au moins deux points (18, 20 ; 22, 24) d'appui disposés en parallèle et par le biais desquels le corps (14) oscillant est accouplé avec le piston (16).
EP07729030A 2006-07-12 2007-05-11 Outil électroportatif muni d'un groupe de percussion Withdrawn EP2043821A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006032214A DE102006032214A1 (de) 2006-07-12 2006-07-12 Handwerkzeugmaschine mit einer Schlagwerkeinheit
PCT/EP2007/054578 WO2008006634A1 (fr) 2006-07-12 2007-05-11 Outil électroportatif muni d'un groupe de percussion

Publications (1)

Publication Number Publication Date
EP2043821A1 true EP2043821A1 (fr) 2009-04-08

Family

ID=38430539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07729030A Withdrawn EP2043821A1 (fr) 2006-07-12 2007-05-11 Outil électroportatif muni d'un groupe de percussion

Country Status (6)

Country Link
US (1) US7857074B2 (fr)
EP (1) EP2043821A1 (fr)
CN (1) CN101489730B (fr)
DE (1) DE102006032214A1 (fr)
RU (1) RU2454312C2 (fr)
WO (1) WO2008006634A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000677A1 (de) * 2008-03-14 2009-09-17 Robert Bosch Gmbh Handwerkzeugmaschine für schlagend angetriebene Einsatzwerkzeuge
DE102008000687A1 (de) * 2008-03-14 2009-09-17 Robert Bosch Gmbh Handwerkzeugmaschine für schlagend angetriebene Einsatzwerkzeuge
DE102008040767A1 (de) * 2008-07-28 2010-02-04 Robert Bosch Gmbh Schlagvorrichtung
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
CN103079771A (zh) * 2010-08-27 2013-05-01 博世电动工具（中国）有限公司 冲击机构
EP2809470B1 (fr) 2012-02-03 2020-01-15 Milwaukee Electric Tool Corporation Marteau rotatif
US9630307B2 (en) 2012-08-22 2017-04-25 Milwaukee Electric Tool Corporation Rotary hammer

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU6463A1 (ru) * 1926-10-06 1928-09-29 Е.М. Радушкевич Ударный инструмент
DE3506695A1 (de) * 1985-02-26 1986-08-28 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
JPS62124883A (ja) * 1985-11-26 1987-06-06 芝浦メカトロニクス株式会社 ロ−タリ−ハンマ
JPS63185506A (ja) * 1987-01-27 1988-08-01 Matsushita Electric Works Ltd ハンマ−ドリル
DE4135240A1 (de) * 1991-10-25 1993-04-29 Bosch Gmbh Robert Bohrhammer
DE4415348A1 (de) * 1994-05-02 1995-11-09 Hilti Ag Bohr- und Meisselgerät
DE19545260A1 (de) * 1995-11-24 1997-05-28 Black & Decker Inc Bohrhammer
JP3450558B2 (ja) * 1995-12-25 2003-09-29 株式会社マキタ 電動工具
JP3582760B2 (ja) * 1997-04-18 2004-10-27 日立工機株式会社 ハンマドリル
DE19851888C1 (de) * 1998-11-11 2000-07-13 Metabowerke Kg Bohrhammer
GB0005822D0 (en) * 2000-03-10 2000-05-03 Black & Decker Inc Coupling mechanism
GB0008465D0 (en) * 2000-04-07 2000-05-24 Black & Decker Inc Rotary hammer mode change mechanism
RU2200817C2 (ru) * 2001-04-16 2003-03-20 Новосибирский государственный технический университет Ударно-поворотный механизм
GB2394437A (en) * 2002-10-23 2004-04-28 Black & Decker Inc Hammer including a piston with wear-reducing washers
DE20301079U1 (de) * 2003-01-24 2003-04-10 Atlas Copco Electric Tools GmbH, 71364 Winnenden Bohrhammer oder Meißelhammer
EP1618999B1 (fr) * 2004-07-14 2008-06-25 AEG Electric Tools GmbH marteau perforateur et/ou marteau-burineur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008006634A1 *

Also Published As

Publication number Publication date
CN101489730B (zh) 2013-04-24
CN101489730A (zh) 2009-07-22
RU2454312C2 (ru) 2012-06-27
US7857074B2 (en) 2010-12-28
WO2008006634A1 (fr) 2008-01-17
US20090008114A1 (en) 2009-01-08
RU2009104344A (ru) 2010-08-20
DE102006032214A1 (de) 2008-01-17

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