EP1170095B1 - Electric handtool with switching-off during idling - Google Patents

Electric handtool with switching-off during idling Download PDF

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Publication number
EP1170095B1
EP1170095B1 EP20010810614 EP01810614A EP1170095B1 EP 1170095 B1 EP1170095 B1 EP 1170095B1 EP 20010810614 EP20010810614 EP 20010810614 EP 01810614 A EP01810614 A EP 01810614A EP 1170095 B1 EP1170095 B1 EP 1170095B1
Authority
EP
European Patent Office
Prior art keywords
tool
characterised
electric hand
sensor
hand 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
EP20010810614
Other languages
German (de)
French (fr)
Other versions
EP1170095A2 (en
EP1170095A3 (en
Inventor
Hans-Werner Bongers-Ambrosius
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
Priority to DE2000133362 priority Critical patent/DE10033362A1/en
Priority to DE10033362 priority
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP1170095A2 publication Critical patent/EP1170095A2/en
Publication of EP1170095A3 publication Critical patent/EP1170095A3/en
Application granted granted Critical
Publication of EP1170095B1 publication Critical patent/EP1170095B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D16/00Portable 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2211/00Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/003Crossed drill and motor spindles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2211/00Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06Means for driving the impulse member
    • B25D2211/068Crank-actuated impulse-driving mechanisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/131Idling mode of tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/221Sensors

Description

The invention refers to an at least partially striking electric hand tool device according to the preamble of claim 1, which is known from the document WO 8 806 508 A is known, For example, a hammer drill or a chisel hammer, with Leerschlagabschaltung a pneumatic impact mechanism.

Electric hand tools with pneumatic percussion use to generate the Beat a reciprocating swinging motion, pointing to a gas spring between one in a hollow cylinder sealing relative to this movable exciter piston and a distanced, in the direction of the tool axis sealingly movable, air piston is applied, which beats axially via an anvil on the tool. The punch is advantageous in the absence of back pressure on the in a tool holder axially limited movable tool interrupted by a space switch.

According to EP759341A3, taking in, by a Leerwegvergrösserung enabled, Discharge position of the striker, for idle stop the gas spring over controlled valves vented to the environment and thus a pressure difference generating the impact prevented. The disadvantage of such a solution are the valves required for this purpose and the valve control.

According to WO88 / 06508, the drive of the percussion mechanism is used for blank stop automatically interrupted by a clutch when the tool has an axial blanking position which is measured with a sensor and with a control unit is evaluated. The disadvantage of such a solution is the required coupling.

It is the object of this invention to provide a simple solution for blanking of a show at least partially beating electric hand tool device.

The object is solved by the features of the independent claim. Advantageous developments emerge from the subclaims.

In essence, the axial position of the tool, the striker or the Schlagwerk scanned with a sensor and this information with a control unit evaluated, which in the case of a blank, the speed of the exciter drive to a previously set speed lowers. Thus, the invention uses the polluter pays principle at the causal for vacancies, constant speed of the exciter drive on. At a sufficiently lowered speed of the exciter drive forms due Vents no more pressure on the fly piston accelerating pressure, whereby no further blows to the striker and the tool are generated. To The speed of the exciter drive is reduced to 10% to 50% of the working speed.

Advantageously, the sensor is designed as an inductive or capacitive sensor, which directly responds to the axial position of the tool, the striker or percussion.

Alternatively, the sensor is designed as a Hall sensor, which is a relative to this associated with a movable magnet having an axial position of the tool, connected to the striker or the percussion actuator.

This actuator is advantageously executed forked engaging axially in the striker, and on the outer circumference of the bonnet, for example, with a light aluminum ring attached. The advantageous from lightweight, highly rigid fiber-reinforced plastic existing actuator has a small magnet, which passes along with the striker at the Hall sensor emotional.

Advantageously, the exciter drive is designed as an electric motor whose engine speed of the Control unit via the engine electronics electronically herabsetzbar is.

Advantageously, the exciter drive and an optional rotary drive via a transmission of derived from a common electric motor, whereby at a space also the Speed of an optional rotational movement is reduced.

The invention will be explained in more detail with respect to an advantageous embodiment with: Fig. 1 as electric hand tool device with Leerschlagabschaltung.

According to Fig. 1, an electric hand tool 1 with a pneumatic percussion 2 with an exciter drive 3, an excitation piston 4, a gas spring 5, a flying piston 6 and an anvil 7, which in the below a striking axis A shown part of Fig. 1st to a housing 8 a Leerschlagposition 9 and in the above the striking axis A. 1 shows a working position 10 of a not fully shown Tool 11, the striker 7 and the flying piston 6 has. With the striker 7 is a axially movable actuator 12 positively connected, which is a magnet 13th has, which is associated with a mounted in the housing 8 Hall sensor 14. The Hall sensor 14 is electrically connected to a control unit 15 and this with an engine electronics 16 an electric motor 17 connected.

Claims (7)

  1. Electric hand tool for generating an at least partially percussive movement of a tool (11) with a pneumatic percussion mechanism (2) and an idling switch-off for percussion in the case of lack of axial counter-pressure over the tool (11), and in the case of idling, a fly piston (6), an optical cupping tool (7) and the optionally accommodated tool (11) are in an idling percussion position (9) which is monitored by a sensor (14) and evaluated by an associated control unit (15), characterised in that in the event of idle percussion a control unit (15) will reduce the rotation of an exciter drive (3) to a preset rotation.
  2. Electric hand tool according to Claim 1, characterised in that the sensor (14) monitors the idling position (9) of the tool (11) or alternatively of the cupping tool (7) or alternatively of the fly piston (6).
  3. Electric hand tool according to Claim 1 or Claim 2, characterised in that the sensor (14) is designed as an inductive or capacitive sensor.
  4. Electric hand tool according to one of the above claims, characterised in that the sensor (14) is designed as a Hall sensor with a magnet (13) which is movable relative to the latter.
  5. Electric hand tool according to Claim 4, characterised in that the magnet (13) is connected to a control member (12) which monitors the idling position (9) of the tool (11) or alternatively of the cupping tool (7) or alternatively of the fly piston (5).
  6. Electric hand tool according to one of the above claims, characterised in that the exciter driver (3) is controllable via a motor electronics (16) of an electric motor (17).
  7. Electric hand tool according to Claim 6, characterised in that the exciter drive (3) and an optional rotary drive are part of a gearing which is driven by a common electric motor (17).
EP20010810614 2000-07-08 2001-06-25 Electric handtool with switching-off during idling Active EP1170095B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2000133362 DE10033362A1 (en) 2000-07-08 2000-07-08 Electric hand tool with empty stroke shutdown
DE10033362 2000-07-08

Publications (3)

Publication Number Publication Date
EP1170095A2 EP1170095A2 (en) 2002-01-09
EP1170095A3 EP1170095A3 (en) 2003-10-29
EP1170095B1 true EP1170095B1 (en) 2005-02-09

Family

ID=7648331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010810614 Active EP1170095B1 (en) 2000-07-08 2001-06-25 Electric handtool with switching-off during idling

Country Status (7)

Country Link
US (1) US6484814B2 (en)
EP (1) EP1170095B1 (en)
JP (1) JP5086505B2 (en)
CN (1) CN1217770C (en)
AU (1) AU5193901A (en)
DE (1) DE10033362A1 (en)
ZA (1) ZA200105554B (en)

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DE10117121A1 (en) * 2001-04-06 2002-10-17 Bosch Gmbh Robert Hand tool
DE10136515C2 (en) * 2001-07-26 2003-10-23 Wacker Construction Equipment Hammer and / or hammer with handle
DE10145464C2 (en) * 2001-09-14 2003-08-28 Wacker Construction Equipment Drill and / or impact hammer with idle control depending on the contact pressure
DE10212064B4 (en) * 2002-03-19 2008-08-21 Robert Bosch Gmbh Operation control for a hand tool
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US20050087352A1 (en) * 2002-07-04 2005-04-28 Atlas Copco Electric Tools Gmbh Portable Tool
DE10240361A1 (en) * 2002-09-02 2004-03-11 Hilti Ag Rotating and striking electric hand machine tool
DE10259566A1 (en) * 2002-12-19 2004-07-01 Hilti Ag Hitting electric hand machine tool
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EP1607186A1 (en) * 2004-06-18 2005-12-21 HILTI Aktiengesellschaft Electro-pneumatic hammer drill / chisel hammer with modifiable impact energy
DE102004031628A1 (en) * 2004-06-30 2006-02-02 Robert Bosch Gmbh Device with an inner shell and an outer shell of a housing of a hand tool
EP1674211A1 (en) * 2004-12-23 2006-06-28 BLACK & DECKER INC. Power tool housing
EP1674214B1 (en) * 2004-12-23 2008-05-28 BLACK & DECKER INC. Power tool housing
EP1674213B1 (en) * 2004-12-23 2008-10-01 BLACK & DECKER INC. Power tool cooling
AU2013200487B2 (en) * 2005-06-28 2016-03-17 Stryker Corporation Motorized surgical tool with a control circuit and a rotor orientation sensor that are isolated from the tool motor
AU2016204090B2 (en) * 2005-06-28 2018-02-01 Stryker Corporation Control assembly for a powered surgical tool with an electric motor, the assembly including an isolated rotor position sensor
CA2613277C (en) 2005-06-28 2016-05-10 Stryker Corporation Powered surgical tool with control module that contains a sensor for remotely monitoring the tool power generating unit
JP4400519B2 (en) * 2005-06-30 2010-01-20 パナソニック電工株式会社 Impact rotary tool
GB2433716A (en) * 2005-12-29 2007-07-04 Bosch Gmbh Robert Hammer drill and/or hammer chisel with bevel gear
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DE102007000081A1 (en) * 2007-02-08 2008-08-21 Hilti Ag Hand tool with pneumatic percussion
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US9216502B2 (en) 2008-04-03 2015-12-22 Black & Decker Inc. Multi-stranded return spring for fastening tool
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DE102010030055A1 (en) * 2010-06-15 2011-12-15 Hilti Aktiengesellschaft Electrically operated bolt gun and method for operating the bolt gun
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DE102012005803A1 (en) 2012-03-21 2013-09-26 Wacker Neuson Produktion GmbH & Co. KG Drilling and / or hammer with load-dependent adaptation of the stroke rate
JP5896143B2 (en) * 2012-03-29 2016-03-30 日立工機株式会社 Electric tool
JP5935983B2 (en) * 2012-03-29 2016-06-15 日立工機株式会社 Electric tool
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EP2855098B1 (en) * 2012-05-25 2017-03-01 Robert Bosch GmbH Percussion unit
US9399281B2 (en) 2012-09-20 2016-07-26 Black & Decker Inc. Stall release lever for fastening tool
US9346158B2 (en) 2012-09-20 2016-05-24 Black & Decker Inc. Magnetic profile lifter
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Also Published As

Publication number Publication date
CN1332062A (en) 2002-01-23
EP1170095A3 (en) 2003-10-29
JP5086505B2 (en) 2012-11-28
CN1217770C (en) 2005-09-07
EP1170095A2 (en) 2002-01-09
JP2002059376A (en) 2002-02-26
US6484814B2 (en) 2002-11-26
AU5193901A (en) 2002-01-10
US20020003045A1 (en) 2002-01-10
ZA200105554B (en) 2002-01-17
DE10033362A1 (en) 2002-01-17

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