EP2040884A1 - Machine-outil à main - Google Patents

Machine-outil à main

Info

Publication number
EP2040884A1
EP2040884A1 EP07729031A EP07729031A EP2040884A1 EP 2040884 A1 EP2040884 A1 EP 2040884A1 EP 07729031 A EP07729031 A EP 07729031A EP 07729031 A EP07729031 A EP 07729031A EP 2040884 A1 EP2040884 A1 EP 2040884A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
tool according
drive
decoupling
torsionally elastic
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.)
Ceased
Application number
EP07729031A
Other languages
German (de)
English (en)
Inventor
Otto Baumann
Helmut Heinzelmann
Thomas Bernhardt
Hardy Schmid
Tobias Herr
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 EP2040884A1 publication Critical patent/EP2040884A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber
    • 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
    • B25D2250/165—Overload clutches, torque limiters

Definitions

  • the invention relates to a hand tool according to the preamble of claim 1.
  • Hand tool machines for drilling or impact drilling in rocks such as rotary hammers, are known.
  • a bat transmits force impulses in the form of bumps via an anvil to a drill bit of the hammer drill
  • a rotary drive of the insert tool takes place via catch lugs, for example with a chuck
  • the chuck is set in rotation by means of a gearhead via a drilling spindle (hammer tube) .
  • a drive which is preferably designed as a universal motor, drives the gearbox.
  • the invention relates to a hand tool for rotating and / or beating driving a recordable in a tool holder insert tool, with a drive train, which has a drive unit near the drive side and a tool holder near output side.
  • the handheld power tool has at least one decoupling unit, which is provided for a torsionally flexible coupling between the drive side and the driven side.
  • the drive train which is usually formed completely rigidly between its drive side and its output side, has a reliable damping of torque surges due to the torsionally flexible coupling of the drive side and output side. Device vibration is reduced and convenience of operator safety for a user is improved.
  • the damping of the rotary drive at several points of the drive train is possible. In this case, an individual measure on a single component or a corresponding damping at two or more points be provided.
  • the drive train is less susceptible to wear by a torsionally flexible coupling.
  • a "decoupling unit” is to be understood as a unit which is arranged between two components and is provided between these two components for decoupling rotational pulses, in particular damping and / or particularly advantageous isolation of angular momenta.
  • the decoupling unit has at least one torsionally elastic connecting member, whereby an advantageous torsionally elastic decoupling of torque surges between two components, which transmit a drive torque to each other, can be achieved.
  • the torsionally elastic connecting member on a socket, so that hereby a structurally simple torsionally elastic decoupling along the drive train can be achieved, especially when the socket is formed by a rubber-elastic bushing.
  • Further torsionally elastic connecting links that appear useful to the person skilled in the art, such as, for example, a rotary steel spring and further, different spring elements, are basically possible.
  • the decoupling unit has at least one decoupling means which additionally enables decoupling in the axial direction.
  • the decoupling unit has at least one decoupling means which additionally enables decoupling in the axial direction.
  • the decoupling means enabling the decoupling in the axial direction is arranged in the axial direction in the region of a hammer tube, whereby a particularly advantageous damping of axial pulses, such as, in particular, striking movements, can be achieved.
  • a service life of individual components can advantageously be increased by being protected against increased wear by means of the axial and / or torsionally elastic decoupling means.
  • the torsionally flexible connecting member can be provided to a torsionally elastic receptacle of a fixed chuck.
  • the chuck is arranged in the drill spindle.
  • the torque pulses generated by a drilling tool during impact drilling can advantageously be damped during a transfer from the solid feed to the drilling spindle, in particular when the torsionally elastic connecting member is formed by a rubber-elastic bushing.
  • an additional decoupling in the axial direction between the chuck and the drill spindle can be achieved.
  • the woonachgiebige connecting member between the drive unit and a drive pinion is arranged, so that the drive unit is advantageously vibration damping connected to the drive pinion and wear in the drive unit and the drive pinion can be advantageously reduced.
  • the fnachgiebige connecting member for transmitting a drive torque between the drive unit and the drive pinion form-fitting connected to the drive unit and / or the drive pinion.
  • At least one gear of at least one transmission unit associated with the drive train can be in a rotationally elastic connection to a shaft.
  • the connection can also be formed in several parts with elastic connecting members, whereby a particularly efficient decoupling and / or damping along the drive train can be achieved.
  • a driveline associated spline with a torsionally elastic link.
  • the spline is disposed on an intermediate shaft between the drive unit and a drill spindle.
  • wear of components can advantageously be reduced by damping and / or decoupling vibrations and / or torque impacts, and at the same time an advantageous transmission of a drive torque can be achieved, in particular if the torsionally flexible connecting member is arranged in a form-fitting manner between the intermediate shaft and the spline is.
  • a Uberlastkupplung is provided with at least one torsionally elastic connecting member, whereby the overload clutch can be advantageously protected against torque butt and / or pulse thrust of the striking mechanism.
  • the hand tool has at least one dreachachgiebiges rotational driving means which is disposed within the tool holder, which in particular torque shocks of an insert tool can be damped particularly effective in a transfer to the tool holder.
  • a "rotationally compliant rotary driving means” is to be understood as meaning a means, in particular a groove means, which can be formed both by a sliding block and by a groove and which is rotationally flexible and / or rotationally mounted for the torsionally elastic decoupling of, in particular, torque impacts.
  • one or more of the measures may be provided in a suitable manner.
  • Fig. 1 is a longitudinal section of a drive train of a preferred hammer drill with percussion device
  • FIG. 2 shows a cross section through a drill spindle along the line II-II of Figure 1.
  • FIG. 1 shows a longitudinal section of a drive train 50 of a preferred hand-held power tool 10 designed as a hammer drill with impact mechanism arrangement.
  • the mode of operation and design of the drive train 50 of a hammer drill is generally known to the person skilled in the art, so that a detailed description can be dispensed with.
  • An unspecified insert tool is rotating and / or beating drivable when it is plugged into a tool holder 32.
  • a hard lining 40 is arranged, in which the insert tool at
  • Insertion in a conventional manner is automatically locked.
  • the insert tool which is held in the tool receptacle 32 in the working state, is connected via the drive train 50 to a drive unit 16, which is preferably designed as an electric motor and is only indicated in sections.
  • the drive train 50 has one of the drive unit 16 near the drive side 12 and one of the tool holder 32 near output side 14.
  • a shaft 18 of the drive unit 16 transmits a drive torque to a drive sprocket 20, which is in engagement with an intermediate shaft 44. Based on arrows in the drive train 50, the transmission path of the drive torque is sketched by the drive unit 16 to the insert tool, not shown in Figure 1.
  • the drive torque is transmitted by means of a gear 60 from the drive pinion 20 of the drive unit 16 to the intermediate shaft 44 and transmitted by means of a further gear 62 from the intermediate shaft 44 to a drill spindle 46.
  • the insert tool is known to be rotatable or hammering or to be driven in a rotating and hammering manner.
  • the handheld power tool 10 has a decoupling unit, which is arranged between the drive side 12 and the output side 14 of the drive train 50.
  • the decoupling unit has different torsionally elastic connecting members 68, 70, 72, 74, 76, 78, 80, which are arranged between two components which transmit a drive torque to each other.
  • the first torsionally elastic connection member 68 is located between the drive unit 16 and the drive sprocket 20, which reduces transmission of torque impacts and / or vibrations occurring in a percussion drilling operation of the handheld power tool to the drive unit 16.
  • the torsionally flexible connecting member 68 is positively connected to the drive unit 16 and positively connected to the drive pinion 20.
  • the further torsionally elastic connecting member 70 is arranged between the drive torque of the drive unit 16 transmitting shaft 18 and the gear 60 included by the first gear unit. This advantageously reduces the transfer of torque impacts and / or vibrations from the gear 60 to the shaft 18.
  • the first gear unit 28 can be provided with further torsionally elastic connecting members between the individual gear wheels, so that maximum damping of torque impacts and / or vibrations is achieved.
  • a spline 56 is arranged thereon, which transmits a drive torque from the intermediate shaft 44 to an impact mechanism 22.
  • the hammer mechanism 22 is designed here as a wobble drive 24 with a wobble finger 26. With the spline 56 of the wobble finger 26 is released or brought in working insert in operative connection with the insert tool or the tool holder 32.
  • the striking mechanism 22 is in the longitudinal direction 34 pulse bursts on the
  • the longitudinal direction 34 is parallel to a longitudinal direction 36 of the intermediate shaft 44. Both end positions of the wobble finger 26 are indicated in the drawing by a solid line or with a broken line.
  • the rotationally mounted drill spindle 46 is designed as a hammer tube 82.
  • the spline toothing 56 with the torsionally elastic connecting member 72 is arranged in a form-locking manner on the intermediate shaft 44, so that a maximum separation is achieved. coupling is achieved in a transmission of a drive torque.
  • the intermediate shaft 44 On a side of the intermediate shaft 44 facing the tool holder 32, the intermediate shaft 44 is connected to the gear 62 of the second gear unit 30 by means of the torsionally flexible connecting member 74.
  • the torsionally elastic connecting member 76 is arranged in the region of an overload coupling 48. The torsionally elastic connecting member 76 of the decoupling unit is in operation of the power tool 10 to a
  • the overload clutch 48 protects the powertrain 50 from overloading should the deployment tool become jammed during operation, for example.
  • a rotational drive 42 is formed, which entrains this when inserted insert tool in a rotation.
  • the insert tool usually has a rotational engagement 42 corresponding shape of its insertion.
  • FIG 2 illustrates a preferred torsionally elastic coupling with reference to a partial section along the line II-II of Figure 1.
  • the rotatably mounted hard chuck 40 is arranged in a drill tube 46 designed as a hammer tube.
  • the insert tool with its insertion end einschreibbar and with two inwardly facing rotary driving means 88, 90 can be latched.
  • the rotary Flexible coupling is realized by the designed as a rubber-elastic sleeve 52 torsionally elastic connecting member 78 which is arranged in a formed on the circumference of the chuck 40, cylindrical recess 58.
  • Another extension-like, bolt-shaped connecting element 84 which is also fixedly formed with the drill spindle 46, is arranged in a further recess 86.
  • the connecting element 84 is arranged at a distance from a cylindrical inner wall of the recess 86. In this way, the inner wall of the recess 86 forms a stop surface 54 of the connecting element 84.
  • the rubber-elastic sleeve 52 is protected from overloading during strong torque collisions, since by means of the stop surface 54 a vibrating movement of the chuck 40 relative to the connecting elements 38, 84 and the drill spindle 46 is limited.
  • the decoupling unit within the tool holder 32 has the further torsionally flexible connecting member 80.
  • the rotary driving means 88, 90 are mounted via the connecting member 80 in the circumferential direction for rotationally elastic decoupling in the solid feed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)

Abstract

L'invention concerne une machine-outil à main conçue pour entraîner un outil inséré dans un logement à outil (32), par rotation et/ou percussion. Cette machine-outil à main comprend une chaîne cinématique (50) qui comporte un côté entraînement (12) situé à proximité d'une unité d'entraînement (16), et un côté sortie (14) situé à proximité du logement à outil (32). Cette invention est caractérisée en ce que la machine-outil à main comprend au moins une unité de découplage servant à assurer un découplage à élasticité rotative entre le côté entraînement (12) et le côté sortie (14).
EP07729031A 2006-07-10 2007-05-11 Machine-outil à main Ceased EP2040884A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006031744 2006-07-10
PCT/EP2007/054579 WO2008006635A1 (fr) 2006-07-10 2007-05-11 Machine-outil à main

Publications (1)

Publication Number Publication Date
EP2040884A1 true EP2040884A1 (fr) 2009-04-01

Family

ID=38457549

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07729031A Ceased EP2040884A1 (fr) 2006-07-10 2007-05-11 Machine-outil à main

Country Status (4)

Country Link
US (1) US20100038104A1 (fr)
EP (1) EP2040884A1 (fr)
CN (1) CN101489731A (fr)
WO (1) WO2008006635A1 (fr)

Families Citing this family (8)

* 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
US9050714B2 (en) * 2009-06-25 2015-06-09 Construction Tools Pc Ab Hand-held demolition tool
JP5395620B2 (ja) * 2009-11-02 2014-01-22 株式会社マキタ 打撃工具
DE102010042981A1 (de) * 2010-10-27 2012-05-03 Robert Bosch Gmbh Werkzeugmaschinenvorrichtung
JP5897316B2 (ja) * 2011-12-01 2016-03-30 株式会社マキタ 電動工具
DE102015206634A1 (de) * 2015-04-14 2016-10-20 Robert Bosch Gmbh Werkzeugvorsatz für eine Handwerkzeugmaschine
JP6479570B2 (ja) * 2015-05-19 2019-03-06 株式会社マキタ 作業工具
US11826891B2 (en) * 2019-10-21 2023-11-28 Makita Corporation Power tool having hammer mechanism

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
DE3107140C2 (de) * 1981-02-26 1985-11-28 Mannesmann AG, 4000 Düsseldorf Rammvorrichtung mit einer Schlagvorrichtung
DE3429140A1 (de) * 1984-08-08 1986-02-20 Black & Decker Inc., Newark, Del. Bohrhammer mit einem pneumatischen schlagwerk
DE3506695A1 (de) * 1985-02-26 1986-08-28 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3807078A1 (de) * 1988-03-04 1989-09-14 Black & Decker Inc Bohrhammer
DE4215288A1 (de) * 1991-07-08 1993-01-14 Bosch Gmbh Robert Bohrhammer
US5411275A (en) * 1993-09-27 1995-05-02 Jacobs Chuck Technology Corporation Chuck with torque limiting mechanism and inclined plane for final tightening
US5588496A (en) * 1994-07-14 1996-12-31 Milwaukee Electric Tool Corporation Slip clutch arrangement for power tool
US5947214A (en) * 1997-03-21 1999-09-07 Baker Hughes Incorporated BIT torque limiting device
JPH11104974A (ja) * 1997-10-06 1999-04-20 Makita Corp 打撃工具
DE19851888C1 (de) * 1998-11-11 2000-07-13 Metabowerke Kg Bohrhammer
US6142242A (en) * 1999-02-15 2000-11-07 Makita Corporation Percussion driver drill, and a changeover mechanism for changing over a plurality of operating modes of an apparatus
GB0008465D0 (en) * 2000-04-07 2000-05-24 Black & Decker Inc Rotary hammer mode change mechanism
GB0105547D0 (en) * 2001-03-07 2001-04-25 Black & Decker Inc Tool holder for a rotary hammer or a chisel hammer
US20040261273A1 (en) * 2003-06-24 2004-12-30 Griep David B. Drive mechanism and power tool
US20050016001A1 (en) * 2003-06-24 2005-01-27 Milwaukee Electric Tool Corporation Drive mechanism and power tool
DE10356928A1 (de) * 2003-12-05 2005-06-30 Robert Bosch Gmbh Schlagwerk, Kolbenvorrichtung und Werkzeugmaschine
DE10361812A1 (de) * 2003-12-30 2005-07-28 Robert Bosch Gmbh Handwerkzeugmaschine
DE102004058686A1 (de) * 2004-09-03 2006-03-09 Robert Bosch Gmbh Elektrowerkzeug mit einem zwischen den Betriebsarten Bohren, Schlagbohren, Meißeln umschaltbaren Antrieb

Non-Patent Citations (1)

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Title
See references of WO2008006635A1 *

Also Published As

Publication number Publication date
CN101489731A (zh) 2009-07-22
US20100038104A1 (en) 2010-02-18
WO2008006635A1 (fr) 2008-01-17

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