EP1958735B1 - Handwerkzeuggerät - Google Patents

Handwerkzeuggerät Download PDF

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Publication number
EP1958735B1
EP1958735B1 EP08101157A EP08101157A EP1958735B1 EP 1958735 B1 EP1958735 B1 EP 1958735B1 EP 08101157 A EP08101157 A EP 08101157A EP 08101157 A EP08101157 A EP 08101157A EP 1958735 B1 EP1958735 B1 EP 1958735B1
Authority
EP
European Patent Office
Prior art keywords
axis
hand
base housing
housing
power tool
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.)
Active
Application number
EP08101157A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1958735A1 (de
Inventor
Axel Fischer
Roland Meuer
Michael Weber
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1958735A1 publication Critical patent/EP1958735A1/de
Application granted granted Critical
Publication of EP1958735B1 publication Critical patent/EP1958735B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/121—Housing details

Definitions

  • the invention relates to a hand tool with the features according to the preamble of claim 1.
  • a hand tool is from document EP 0 370 952 A1 which is considered to be the closest prior art.
  • the hand tool device on a base housing, in which a working means is provided which is movable in operation along a working axis defining a first virtual space axis back and forth.
  • This working axis is spaced in the direction of a first spatial axis perpendicular to the second spatial axis to a center of gravity, which is formed for example by the center of mass of the power tool with or without a tool attached thereto.
  • the hand tool device has an outer housing, which is held on the base housing by means of elastic decoupling means at least partially spaced apart relative to the plane.
  • the outer housing is firmly connected to a main handle and side handle connecting means which are formed in the case of a fixed side handle by the fixed connection and in the case of a removable side handle by housing side connecting means, for example, have a thread or a receiving area for fixing a grip side strap.
  • the vibration reduction takes place in all directions via the respective largely vibration-decoupled suspension, which virtually isolates a large part of the vibrations occurring during operation of the handle, depending on the spring means used also a more or less large damping effect is present. In the following, this is referred to as decoupling, irrespective of the proportion of the damping effect.
  • a hammer drill which has a hammer housing, on which an outer shell is held at a distance enclosing, having a first and second handle.
  • a plurality of elastic articulation points between the hammer housing and the outer shell are provided. At these articulation points engages in each case a shell-side bolt with the interposition of a rubber-elastic material in a housing-side sleeve.
  • a disadvantage of the known hand tool is that no sufficient decoupling of the handle from the torsional vibrations occurring on the housing is possible. Rather, the torsional vibrations due to the shown triangular arrangement of the articulation points and acting at all articulation points in the direction of rotation small extent of the rubber-elastic material are released almost unabated from the hammer housing to the outer shell. As a result, a relatively high vibration still occurs during operation, in particular along the second spatial axis.
  • the present invention has for its object to avoid the disadvantages mentioned in a generic hand tool and to reduce the vibrations transmitted to the handles as a result of torsional vibrations.
  • a hand tool with the features of claim 1, wherein the decoupling comprise in a vertical projection on a plane defined by the first and second spatial axis a center of gravity adjacent first storage device, via which the housing over both in the direction of the first spatial axis displaceable and is held substantially pivotable along the direction of rotation of the torsional vibrations.
  • the over-housing can be displaceable essentially parallel to the first spatial axis or also in the direction of the first spatial axis by means of the first mounting device.
  • the housing is in addition to this axial mobility also still pivotable parallel to the plane, with a twistability or tilting of the term "pivoting" should be included.
  • the decoupling means have between the base housing and the outer housing on a first spring means which acts along the first spatial axis.
  • a first spring means which acts along the first spatial axis.
  • the decoupling means further comprise a second storage device spaced apart from the first storage device and the first spring device.
  • the second bearing device on resilient means having a first spring stiffness, which act in a rotational direction along which are directed during operation, the torsional vibrations of the base housing around the center of gravity.
  • the spring stiffness of the resilient means is in this case many times larger than acting in the direction of rotation second spring stiffness of the first spring means, if the spring means has an effective in the direction of rotation spring stiffness.
  • pivoting means are provided on the first bearing means, which have a distance to the center of gravity along the first spatial axis which is at most 0.4 times the distance of the center of gravity to a rear side of the base housing. This allows the generated around the center of gravity during operation Torsional vibrations of the base housing are particularly well decoupled from the housing.
  • the pivot means have an effective Schwenkarrangingmoi axis of rotation, which is arranged with respect to the second spatial axis between the center of gravity and the working axis, which ensures a particularly favorable for the decoupling relative movement between the outer housing and the base housing.
  • At least one of the storage devices has paired decoupling means, which have a distance relative to a third spatial axis perpendicular to the plane.
  • decoupling means which are spaced apart from one another along the third spatial axis, a particularly lateral-stable mounting of the housing on the base housing can be achieved during operation, which ensures good guidance of the hand-held power tool.
  • the storage devices can also be provided on one side in accordance with stable design.
  • a pin connected to one of the two housings is provided between the base housing and the housing. This is on the one hand along a provided on the respective other housing and aligned along the first spatial axis guide displaced and on the other hand against the same rotatable.
  • a substantially resistance-free pivot bearing in addition to a substantially resistance-free pivot bearing, a substantially resistance-free mounting of the housing, even in the axial direction, is achieved.
  • a particularly good decoupling is also possible with regard to the axial vibrations along the first spatial axis.
  • the guide is formed by an inserted into the outer housing slot and the pin is connected to a transmission device receiving part of the base housing, whereby the first storage device is particularly stable but inexpensive to produce.
  • the guide is hereby curved in relation to the first spatial axis.
  • a particularly low-resistance torsional vibration of the housing over the base housing is made possible.
  • the spring device has spring means which press against the pin. This allows the first storage device and the spring device in be arranged in a common area, which reduces the total space required for the decoupling means. Further, by the direct arrangement of the spring means on the pin acting as part of the pivot bearing whose deflection along the second spatial axis can be avoided, which in turn improved decoupling of the outer housing in the direction of rotation can be achieved by means of the second storage device.
  • the first bearing device has an articulated arm, which has a first rotational connection with the base housing and a second rotational connection with the outer housing.
  • the first bearing device has leaf spring means, which are elastically deformable between the base housing and the housing in the direction of the first spatial axis and in the direction of rotation, which enables a cost-effective production of the first bearing device.
  • the leaf spring means are integrally formed by a U-shaped leaf spring element which engages around the base housing at the height of the working axis.
  • sliding surfaces are provided on the outer housing, which interact with counter sliding surfaces of the base housing, wherein the sliding surfaces and Jacobgleit lake are formed parallel to the plane. In this way, a particularly stable lateral guidance of the housing on the base housing can be ensured, with the smallest possible space.
  • Fig. 1 shows a hand tool 2 in the form of a hammer drill.
  • the hand tool 2 has a base housing 4, in which a transmission device 6 and a percussion device 8 are housed, which are driven by a motor 10 in a manner not shown.
  • a working means 12 is moved in the form of a flying piston along a working axis A back and forth, which defines a first spatial axis z.
  • the working means 12 in this case serves for the recurrent loading of a tool 16 held on a tool holder 14 in the form of a drill with a striking energy.
  • the base housing 4 is almost completely enclosed by an outer housing 18, which by a first bearing means 19, a spring means 20; 20 'and a second bearing means 21, which serve as a decoupling means, spaced on the base housing 4 is held.
  • this outer housing 18 forms a main handle 24.
  • the housing 18 has a housing in the working direction AR front end 26 side handle connecting means 28 in the form of a cylindrical receiving surface on which a side handle 30 is required, as required.
  • the entire hand tool 2 with the attached tool 16 has a center of gravity SP, which is spaced with respect to a second spatial axis y perpendicular to the first space axis z to the axis A.
  • a rotational movement along a direction of rotation DR around the center of gravity SP is generated, the direction of rotation DR being parallel to a plane Eyz spanned by the first spatial axis z and the second spatial axis y.
  • a substantially along the first spatial axis z directed axial Hin is about the first storage device 19, as indicated by the movement arrow AB and ago movement of the base housing 4 relative to the outer housing 18 allows.
  • the first storage device 19 is disposed adjacent to the center of gravity SP and has generally designated as pivot means 32 means for pivotal or pivotal mounting, which form an effective pivot axis wS.
  • pivot means 32 means for pivotal or pivotal mounting, which form an effective pivot axis wS.
  • the torsional vibrations occurring during operation about the center of gravity SP can be decoupled particularly well from the housing 18, when an axial distance as the pivot means 32 to the center of gravity SP with respect to the first spatial axis z not greater than 0.4 times an axial distance ar the pivot means SP to a rear end 22 facing the rear side 34 of the base housing 4 amounts.
  • the spring device 20 is exemplified by a coil spring and supports the outer housing 18 in the direction of the first spatial axis z at a the impact device 8 receiving upper part 40 of the base housing 4 from.
  • the spring device 20 can also act directly on the pivot means 32.
  • the second bearing device 21 is formed by way of example by an angled leaf spring, which at the same time as a pivot bearing and spring means. Alternatively, it is also possible to ensure the pivot bearing function and the spring function on the second bearing device 21 by separate means.
  • the second storage device 21 is spaced from the first storage device 19 and the spring device 20; 20 'between a motor 10 receiving the lower part 42 of the base housing 4 and the outer housing 18 is arranged.
  • the second bearing device 21 has a acting in the direction of rotation DR first spring stiffness FS1, which is in any case a multiple higher than acting in the direction of rotation second spring stiffness FS2 of the spring means 20; 20 '.
  • the second spring stiffness FS2 approaches zero owing to the orientation of the helical spring which is essentially transverse to the direction of rotation DR.
  • the pivot means 32 and acting on the first bearing means 19 in the direction of rotation DR forces or moments largely excluded.
  • the torsional vibration generated during operation is taken up to a significant extent by the second bearing device 21 around the center of gravity SP and decoupled from the outer housing 18.
  • a plurality of sliding surfaces 36 are formed on the housing 18, which abut along a plane perpendicular to the plane Eyz third spatial axis x to corresponding mating sliding surfaces 38 of the base housing 4. Due to the sliding surfaces 36 and counter sliding surfaces 38, the outer housing 18 is supported in the direction of the third spatial axis x on both sides of the base housing 4, while it can be moved parallel to the plane Eyz. It can be provided on the sliding surfaces 36 or mating surfaces 38 resilient means or the sliding surfaces 36 or Gegengleit vom 38 itself by resilient means, such as elastomeric body, be formed to allow decoupling along all three spatial axes (z, y, x).
  • the Fig. 2 and 3 show a first embodiment of the first storage device 19, in which the spring device 20 ', for example, acts directly on the pin 46.
  • the pivot means 32 are in this case formed by two pins 46 which protrude on opposite sides of the base housing 4 along the third spatial axis x of this and are each rotatable in a guide 48.
  • the two guides 48 are aligned along the first spatial axis z and formed on the housing 18, for example, as slots.
  • the guides 48 may be formed on the base housing 4 while the pins 46 protrude from the housing 18 to the inside. Further is It is also possible to form the guides 48 by scenes, not shown, which are curved.
  • Fig. 4 and 5 show a further alternative embodiment of the first storage device 19, wherein elements having the same function corresponding designations, as in the embodiment according to Fig. 2 and 3 ,
  • the pivot means 32 are in this case formed by webs 52 of a leaf spring element 54, which is U-shaped and extends at the height of the axis A to the base housing 4 around.
  • the leaf spring element 54 is fastened to the outer housing 18 by means of a screw connection 58.
  • the webs 52 are fixed at a respective free end 60 to corresponding receptacles 62 of the base housing 4.
  • a pivoting movement SB is possible about an effective pivot axis wS defined by the leaf spring element 54, wherein the pivoting movement SB lies approximately along the direction of rotation DR, the torsional vibrations generated during operation.
  • Fig. 6 and 7 show a further alternative embodiment of the first storage device 19, wherein elements having the same function corresponding designations, as in the embodiments according to Fig. 2 to 5 ,
  • the pivot means 32 are in this case formed by two articulated arms 64. These articulated arms 64 are arranged spaced apart on the opposite sides of the base housing 4 in the direction of the third spatial axis x and each have a first rotary joint 66 with the base housing 4 and a second rotary joint 68 with the outer housing 18.
  • a pivoting movement with respect to the first spatial axis z is stable between the base housing 4 and the outer housing 18, with a substantially axial movement component, as indicated by the movement arrow AB, as well as a pivoting movement SB about the first rotary joint 66 defined effective pivot axis wS possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Vibration Prevention Devices (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Machine Tool Copy Controls (AREA)
EP08101157A 2007-02-15 2008-01-31 Handwerkzeuggerät Active EP1958735B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007000093A DE102007000093A1 (de) 2007-02-15 2007-02-15 Handwerkzeuggerät

Publications (2)

Publication Number Publication Date
EP1958735A1 EP1958735A1 (de) 2008-08-20
EP1958735B1 true EP1958735B1 (de) 2010-08-04

Family

ID=39312921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08101157A Active EP1958735B1 (de) 2007-02-15 2008-01-31 Handwerkzeuggerät

Country Status (6)

Country Link
US (1) US8443912B2 (ja)
EP (1) EP1958735B1 (ja)
JP (1) JP5416905B2 (ja)
CN (1) CN101244556B (ja)
AT (1) ATE476279T1 (ja)
DE (2) DE102007000093A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8505798B2 (en) 2005-05-12 2013-08-13 Stanley Fastening Systems, L.P. Fastener driving device

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DE102006000253A1 (de) * 2006-05-30 2007-12-06 Hilti Ag Schlagende Handwerkzeugmaschine mit axial beweglich gelagertem Schlagwerk
JP4756474B2 (ja) * 2006-07-20 2011-08-24 日立工機株式会社 電動工具
DE102007055843A1 (de) * 2007-12-17 2009-06-25 Hilti Aktiengesellschaft Handwerkzeugmaschine mit Schwingungsausgleicher
GB0804963D0 (en) * 2008-03-18 2008-04-16 Black & Decker Inc Hammer
GB0804964D0 (en) * 2008-03-18 2008-04-16 Black & Decker Inc Hammer
EP2105261A1 (de) * 2008-03-27 2009-09-30 AEG Electric Tools GmbH Elektrowerkzeug, insbesondere Bohr- und/oder Meißelhammer
JP5128998B2 (ja) * 2008-04-04 2013-01-23 株式会社マキタ 手持式作業工具
JP5361504B2 (ja) * 2009-04-10 2013-12-04 株式会社マキタ 打撃工具
DE102009002463A1 (de) * 2009-04-17 2010-10-21 Hilti Aktiengesellschaft Seitenhandgriff
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DE102011113737A1 (de) * 2011-09-15 2013-03-21 C. & E. Fein Gmbh Oszillierende Werkzeugmaschine mit Vibrationsreduktion
EP2848370A1 (de) 2013-09-12 2015-03-18 HILTI Aktiengesellschaft Handwerkzeugmaschine
CN103624297A (zh) * 2013-10-24 2014-03-12 哈尔滨宏万智科技开发有限公司 一种垫肩式电锤
DE102015015321A1 (de) * 2014-11-28 2016-06-02 Makita Corporation Schlagwerkzeug
CN104708600A (zh) * 2015-03-18 2015-06-17 江苏源通电气有限公司 一种保护钻头的多用钻孔机
DE102016217854A1 (de) * 2016-09-19 2018-03-22 Robert Bosch Gmbh Handwerkzeugmaschine mit mindestens einem externen Augmented Reality Device
EP3501750A1 (de) * 2017-12-19 2019-06-26 Hilti Aktiengesellschaft Vibrationsgedämpfte handwerkzeugmaschine
EP3626399A1 (de) 2018-09-20 2020-03-25 Hilti Aktiengesellschaft Handwerkzeugmaschine und verfahren zum betreiben einer handwerkzeugmaschine
US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool
EP4331773A1 (de) * 2022-08-29 2024-03-06 Hilti Aktiengesellschaft Bohr- oder meisselhammer mit einem schwingungsentkoppelten gerätegehäuse
EP4331774A1 (de) * 2022-08-29 2024-03-06 Hilti Aktiengesellschaft Werkzeugmaschine mit einer entkopplungsvorrichtung

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8505798B2 (en) 2005-05-12 2013-08-13 Stanley Fastening Systems, L.P. Fastener driving device

Also Published As

Publication number Publication date
CN101244556B (zh) 2012-01-11
JP5416905B2 (ja) 2014-02-12
EP1958735A1 (de) 2008-08-20
DE102007000093A1 (de) 2008-08-21
ATE476279T1 (de) 2010-08-15
DE502008001056D1 (de) 2010-09-16
US8443912B2 (en) 2013-05-21
CN101244556A (zh) 2008-08-20
JP2008194821A (ja) 2008-08-28
US20080202785A1 (en) 2008-08-28

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