EP1787760B1 - Handwerkzeuggerät mit geschäumter Verkabelung - Google Patents

Handwerkzeuggerät mit geschäumter Verkabelung Download PDF

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Publication number
EP1787760B1
EP1787760B1 EP06123837A EP06123837A EP1787760B1 EP 1787760 B1 EP1787760 B1 EP 1787760B1 EP 06123837 A EP06123837 A EP 06123837A EP 06123837 A EP06123837 A EP 06123837A EP 1787760 B1 EP1787760 B1 EP 1787760B1
Authority
EP
European Patent Office
Prior art keywords
strands
housing
hand
power tool
protective covering
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
EP06123837A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1787760A1 (de
Inventor
Manfred Ege
Kay Paszehr
Ernst-Rudolf Lübkert
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 EP1787760A1 publication Critical patent/EP1787760A1/de
Application granted granted Critical
Publication of EP1787760B1 publication Critical patent/EP1787760B1/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
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • 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
    • B25D2250/041—Cable management or routing of electrical cables and wires

Definitions

  • the invention relates to a hand tool that generates vibrations during operation, such as in particular an electric hammer drill, a chisel or impact drill, a motorized saw, in particular a jigsaw or saber saw, or a separating or grinding device, in particular an angle grinder.
  • the hand tool has a main body housing a drive motor and a handle housing.
  • the handle housing is limitedly movable relative to the main housing in at least one spatial direction.
  • an operable by a pusher motor switch is provided on the handle housing, which is electrically connected via a wiring to the drive motor.
  • the wiring has, at least in sections, two parallel strands.
  • vibration-reducing means may be provided in such hand tools. These are formed as spring or damping means and act between said housing parts. In this way it is possible to significantly reduce the transmission of vibrations occurring during operation on the main housing to the handle housing.
  • a vibration reducing device of a tool device which acts in a connection region between a handle housing and a main housing.
  • the main housing has two bearing openings through which a displaceable connecting element protrudes. Both connecting elements are connected at one end to the handle housing and at the other end with a bearing device pivotable against a spring force.
  • the handle housing is slidably held against the spring force against the main housing in this way.
  • a switch is accommodated in the handle housing, which is electrically connected via a plurality of strands with a motor in the main housing. The wiring is guided for this purpose through one of the bearing openings.
  • a disadvantage of the known tool device that the strands are loosely arranged in the connection area and thereby abut both against each other and to housing parts. Due to the relative movement between the handle housing and the main housing occurring during operation as a result of the vibrations, relative movements of the strands with one another and with respect to the housing occur. These relative movements can easily result in a strand jamming or rubbing the strands against each other or on the housing. As a result, especially in the presence of drill dust inside the housing, damage to the wiring can quickly occur, which can lead to failure of the tool device.
  • the present invention has for its object to avoid the disadvantages mentioned in a power tool with a relation to the main housing vibration-reducing mounted handle housing with motor switch and protect the wiring against damage.
  • the object is achieved in that the strands are embedded in a foamed protective sheath so that they are largely fixed to each other.
  • a slivering of the two strands and resulting damage can be avoided.
  • two or more strands can be handled simultaneously in this way, which greatly simplifies the assembly of the wiring in the power tool.
  • the protective jacket made of foamed material damage to the strands can be effectively prevented by friction, also the protective jacket can be made sufficiently rigid to prevent jamming of the wiring between two mutually in operation moving parts.
  • the parallel laid strands are arranged spaced apart in the protective jacket to exclude any rubbing and resulting damage to the strands, even with heavy loads.
  • the protective jacket has at least one stretchable curvature.
  • stretchable is to be understood that the protective sheath is determined at least over a portion of the curvature of any element of the tool device.
  • Elongated curvature is obtained even in the installed state of the wiring length of the protective jacket or the strands, which can better absorb, for example, the changes in distance between terminal areas or electrical or electronic elements occurring during operation by the relative movements of the handle housing to the main housing. In this way, the risk of damage to the strands or to their electrical connections can be further reduced.
  • At least one electrical or electronic component which is connected to the wiring, is foamed into the protective jacket.
  • the wiring and electrical or electronic components such as capacitors
  • effective protection against damage due to vibrations or shocks occurring during operation obtained.
  • a particularly easy to install assembly group can be made. This can for example be produced separately from the rest of the machine tool and only be used in its final assembly in this.
  • the protective jacket forms clamping bodies which can be connected to bearing means fixed to the housing.
  • the protective jacket can be quickly and safely installed in the tool together with the wiring and optionally with other foamed therein technical or electronic components.
  • the protective jacket can be positioned exactly so that a sufficient freedom of movement to compensate for the relative movements occurring on the housing is ensured without damage from friction.
  • the protective sheath is made of thermosetting polyurethane foam, which ensures sufficient flexibility in addition to a high resistance to friction with ease of manufacture.
  • Fig. 1 shows an electric hand tool 2 in the form of a chisel device with a two-part housing 4.
  • This has a handle housing 6, which is held by means of vibration-reducing means 8 shown on a main housing 10.
  • the vibration reducing means 8 may be formed by resilient means, damping means or combinations of both means.
  • the handle housing 6 along a first spatial direction H, which is parallel to a working direction A of the power tool 2, held relative to the main housing 10 limited mobility.
  • the handle housing 6 can also be kept limitedly movable in one or both of the spatial directions perpendicular to the first spatial direction H with respect to the main housing 10.
  • a drive motor 12 of the power tool 2 is housed. This is electrically connected via a total of 14 designated wiring with a motor switch 16 an electronics 18, in the form of a control and display electronics, a power cord 20 and a capacitor 22, which are held on the handle housing 6.
  • the wiring 14 has a connection string 24, which forms an electrical connection between the handle housing 6 and the main housing 10.
  • the wiring 14 has a wiring harness 26. This connects by means of several strands 28 a motor terminal 30 for electrical connection to the drive motor 12 or its power electronics (not shown), a switch terminal 32 for electrical connection to the motor switch 16, an electronic connection 34 for electrical connection to the electronics 18, a Mains connection 36 for electrical connection to the power cable 20 and the capacitor 22 with each other.
  • the strands 28 are foamed over the greater part of their extension length of a protective jacket 28 made of thermosetting polyurethane foam.
  • the capacitor 22 is embedded in the protective jacket 38. In this way, both the strands 28 and the capacitor are protected from damage by friction with the handle housing 6.
  • the protective jacket 38 has a certain rigidity, which allows comfortable handling of the cable harness 26 during assembly or repairs.
  • the polyurethane foams used in this case themselves form the blowing agent required for foaming by chemical reaction.
  • the blowing agent is supplied separately to run predetermined areas without propellant and thus compact. In this way, for example, recordings, in particular for the electronics 18, could be made in one piece with the protective jacket 38.
  • a plurality of clamping body 40 are formed, which can be fixed to bearing means 42, which are formed for example in the form of ribs or recesses on the handle housing 6, as in Fig. 3 shown.
  • bearing means 42 which are formed for example in the form of ribs or recesses on the handle housing 6, as in Fig. 3 shown.
  • These curvatures 44 can be stretched by their free position even when installed and thus allow each a change in length of the wiring 14, without the strands are subjected to a tensile force.
  • Fig. 4a shows a cross section through the connecting strand 24. As can be seen from this, while several strands 28 are parallel to each other in the protective sheath 38th embedded. By the protective jacket 38, the strands 28 are on the one hand protected against the accumulation of drilling dust and fine dust. In addition, the strands 28 are fixed to each other by the respective embedding.
  • the strands 28 are individually wrapped to prevent the accumulation of abrasive debris and fine dust.
  • any contact, in particular any rubbing, between the strands 28 is excluded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Motor Or Generator Frames (AREA)
  • Portable Power Tools In General (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP06123837A 2005-11-21 2006-11-10 Handwerkzeuggerät mit geschäumter Verkabelung Active EP1787760B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005000161A DE102005000161A1 (de) 2005-11-21 2005-11-21 Handwerkzeuggerät mit geschäumter Verkabelung

Publications (2)

Publication Number Publication Date
EP1787760A1 EP1787760A1 (de) 2007-05-23
EP1787760B1 true EP1787760B1 (de) 2010-02-24

Family

ID=37775247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06123837A Active EP1787760B1 (de) 2005-11-21 2006-11-10 Handwerkzeuggerät mit geschäumter Verkabelung

Country Status (5)

Country Link
US (1) US20070114051A1 (zh)
EP (1) EP1787760B1 (zh)
JP (1) JP2007136664A (zh)
CN (1) CN1970241A (zh)
DE (2) DE102005000161A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8196674B2 (en) * 2008-03-05 2012-06-12 Makita Corporation Impact tool
DE102009001371A1 (de) * 2009-03-06 2010-09-09 Hilti Aktiengesellschaft Handgeführtes Eintreibgerät
JP2011016201A (ja) * 2009-07-10 2011-01-27 Makita Corp 電動工具
JP5740563B2 (ja) * 2009-09-25 2015-06-24 パナソニックＩｐマネジメント株式会社 電動工具
JP2012254508A (ja) * 2011-06-10 2012-12-27 Makita Corp 電動工具
DE102012209925A1 (de) * 2012-06-13 2013-12-19 Hilti Aktiengesellschaft Handwerkzeugmaschine
DE102012209919A1 (de) 2012-06-13 2013-12-19 Hilti Aktiengesellschaft Handwerkzeugmaschine
EP3326758B1 (en) * 2016-11-28 2022-08-10 Guido Valentini Power tool

Family Cites Families (32)

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US2685042A (en) * 1952-04-30 1954-07-27 Bosch Gmbh Robert Insulated electric power tool
US3259770A (en) * 1962-06-08 1966-07-05 Sunbeam Corp Portable electric tool with a two part housing
US3481411A (en) * 1968-02-19 1969-12-02 Black & Decker Mfg Co Sonic tool with means for reducing noise level
US3476960A (en) * 1968-07-01 1969-11-04 Singer Co Double insulated power tools
US3588783A (en) * 1968-09-20 1971-06-28 Kdi Sealtron Corp Multiple conductor cable connector
BE758670A (fr) * 1970-03-26 1971-04-16 Kabel Metallwerke Ghh Procede de fabrication de mousse d'urethane rigide et plastifiee, a cellules fermees
DE2152585C3 (de) * 1971-10-22 1979-03-22 Robert Bosch Gmbh, 7000 Stuttgart Kunststoffgehäuse, insbesondere für Kraftwerkzeuge
CH579606A5 (zh) * 1973-06-18 1976-09-15 Bbc Brown Boveri & Cie
US3992569A (en) * 1975-02-11 1976-11-16 Hexcel Corporation Protective cable enclosure, cable assembly including the same, and method of encapsulating a cable in a protective enclosure
US4032806A (en) * 1976-02-02 1977-06-28 The Singer Company Battery powered power tools
DE3151235A1 (de) * 1981-12-21 1983-06-30 Siemens AG, 1000 Berlin und 8000 München Flexible elektrische leitung
JPH0452888Y2 (zh) * 1985-08-23 1992-12-11
US4734545A (en) * 1986-11-26 1988-03-29 The Furukawa Electric Co., Ltd. Insulated conductor for a wire harness
US4980386A (en) * 1989-04-28 1990-12-25 Polymer Dynamics Technology, Inc. Methods for the manufacture of energy-attenuating polyurethanes
US5220130A (en) * 1991-08-06 1993-06-15 Cooper Industries, Inc. Dual insulated data cable
JPH09506641A (ja) * 1992-06-26 1997-06-30 ミネソタ マイニング アンド マニュファクチャリング カンパニー ポリウレタン／ポリ尿素エラストマー
SE502953C2 (sv) * 1992-11-09 1996-02-26 Atlas Copco Tools Ab Flerpartskabel med flexibel zon
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Also Published As

Publication number Publication date
EP1787760A1 (de) 2007-05-23
DE502006006227D1 (de) 2010-04-08
DE102005000161A1 (de) 2007-05-24
CN1970241A (zh) 2007-05-30
JP2007136664A (ja) 2007-06-07
US20070114051A1 (en) 2007-05-24

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