EP1607187A1 - Procédé et appareil pour l'amélioration de la réponse en coupure d'un outil électropneumatique à percussion - Google Patents

Procédé et appareil pour l'amélioration de la réponse en coupure d'un outil électropneumatique à percussion Download PDF

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Publication number
EP1607187A1
EP1607187A1 EP04102799A EP04102799A EP1607187A1 EP 1607187 A1 EP1607187 A1 EP 1607187A1 EP 04102799 A EP04102799 A EP 04102799A EP 04102799 A EP04102799 A EP 04102799A EP 1607187 A1 EP1607187 A1 EP 1607187A1
Authority
EP
European Patent Office
Prior art keywords
piston
valve
control sleeve
dredging
pressure
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.)
Granted
Application number
EP04102799A
Other languages
German (de)
English (en)
Other versions
EP1607187B1 (fr
Inventor
Harald Schmitzer
Christoph Würsch
Alexander John
Hans Böni
Alexander Grosser
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
Priority to EP04102799A priority Critical patent/EP1607187B1/fr
Priority to DE502004011101T priority patent/DE502004011101D1/de
Publication of EP1607187A1 publication Critical patent/EP1607187A1/fr
Application granted granted Critical
Publication of EP1607187B1 publication Critical patent/EP1607187B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
    • 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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0019—Guide-sleeves
    • 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
    • B25D2250/035—Bleeding holes, e.g. in piston guide-sleeves
    • 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
    • B25D2250/131—Idling mode of tools
    • 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
    • B25D2250/141—Magnetic parts used in percussive tools
    • B25D2250/145—Electro-magnetic parts

Definitions

  • the path of the bonnet or tool in Lifting the device from the ground used, but not by one To control sleeve, but to the striking mechanism or its air spring extend.
  • the extension of the effective percussion length to the Döpperweg causes the air spring is so soft that the flying piston is not sucked again during the return stroke of the exciter piston.
  • the inventive method for improving the Nachtsch s an electropneumatic degradation device, in particular a Drill and / or chipping hammer, in which within a guide tube via an air spring by an electrically driven excitation piston accelerated flying piston acts on a mining tool is according to the invention characterized in that to reduce the lookup of the flying piston when lifting the dismantling device from the machined Underground the pressure between the flying piston and the excitation piston is increased.
  • the valve device a check valve, on the lifting of the Tool from the underground during the return stroke of the exciter piston between this and the air piston resulting negative pressure on a higher pressure, in particular ambient pressure is raised.
  • the guide tube in the region of the air spring at least a bore, also referred to herein as a "puff hole,” and the check valve is displaceable relative to the guide tube and arranged so that when lifting the excavator from the ground by a Adjustment is aligned with the bore.
  • a further basic embodiment variant of the invention provides the valve device by means of at least one actively switched valve, for example, an electromagnetically actuated valve, such as in To realize the shape of a dynamic valve sleeve valve.
  • the valve is in particular by an electromagnetically actuated Control sleeve formed in a switching position at least one of the guide tube closing through hole to the air spring closes and in releases another shift position.
  • Another tried and tested The solution for a dynamic valve sleeve valve is the Control sleeve relative to the guide tube of the striking mechanism axially by a To move the voice coil actuator whose displaceable core through the Control sleeve is formed.
  • Fig. 1 shows a schematic side sectional view of a mining device with features of the invention, in the example shown a Drill and / or chisel hammer 1, whose housing is divided by two parts is formed, namely a handle shell 2 and a motor housing shell. 3
  • this division of the housing is not mandatory; there are others one-, two- or multi-part housing enclosures for devices of this type.
  • the power supply is via a connection cable 6.
  • the mean pressure is to be estimated, which is so in the Schlagwerk is generated to illustrate that the forces are sufficient the flying mass 14 within a short time forward in the direction Accelerate tool.
  • the maximum overpressure that can be generated by the check valves is about 3/4 of the external pressure p 0 , if it is assumed that the connecting rod length corresponds to the length l eff of the percussion mechanism.
  • a mining device of the type mentioned, in particular a drilling and / or Chisel hammer the more user-friendly, the lower the contact pressure which the user has to apply in order for the device to Business interruption z. B. when settling of the ground, again starts up quickly and works stably. By generating a higher Pressure between the excitation piston 12 and the flying piston 14 when settling of the device becomes the contact force required for restart something increased.
  • the time-correlated partial diagrams (a) to (c) illustrated in FIG. 8 illustrate Simulation results with the impact mechanism according to Fig. 2 A / B were performed.
  • the bottom part of the diagram (c) shows the time course of the in Schlagwerk existing air mass in a stop and start operation for a striking mechanism according to the invention.
  • the pump-up or control sleeve 17 is activated, i. H. at the Settling of the device is shifted to the position shown in Fig. 2B.
  • the Schlagwerk comes to a halt within two shots, which is fine can be seen from the partial diagram (b) of FIG. 8.
  • FIGS. 11 and 12 show the already explained FIGS. 8 and 10, respectively Graphics or diagrams for a striking mechanism with a Pump-up or control sleeve 17 shown in FIG. 7 with additional (additional) Discharge opening (discharge openings) 32.
  • a check valve compared with the embodiments described with reference to FIGS. 1 to 12 replaced by a fast switching valve 60, the one can be magnetically actuated 2/2-way valve.
  • the valve 60 is closed as soon as the Exciter piston 12 changes its direction of movement at the rear dead center. The air is compressed and generated during the advance of the exciter piston 12 an overpressure. The valve 60 is then reopened each time shortly after the exciter piston 12 the front dead center or reversal point has reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP04102799A 2004-06-18 2004-06-18 Appareil pour l'amélioration de la réponse en coupure d'un outil électropneumatique à percussion Expired - Lifetime EP1607187B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04102799A EP1607187B1 (fr) 2004-06-18 2004-06-18 Appareil pour l'amélioration de la réponse en coupure d'un outil électropneumatique à percussion
DE502004011101T DE502004011101D1 (de) 2004-06-18 2004-06-18 Einrichtung zur Verbesserung des Abschaltverhaltens eines elektropneumatischen Abbaugeräts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04102799A EP1607187B1 (fr) 2004-06-18 2004-06-18 Appareil pour l'amélioration de la réponse en coupure d'un outil électropneumatique à percussion

Publications (2)

Publication Number Publication Date
EP1607187A1 true EP1607187A1 (fr) 2005-12-21
EP1607187B1 EP1607187B1 (fr) 2010-04-28

Family

ID=34929218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04102799A Expired - Lifetime EP1607187B1 (fr) 2004-06-18 2004-06-18 Appareil pour l'amélioration de la réponse en coupure d'un outil électropneumatique à percussion

Country Status (2)

Country Link
EP (1) EP1607187B1 (fr)
DE (1) DE502004011101D1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2500141A1 (fr) * 2011-03-18 2012-09-19 Makita Corporation Outil d'impact
EP2711137A1 (fr) * 2012-09-21 2014-03-26 Black & Decker Inc. Une perceuse à percussion
CN102083593B (zh) * 2008-05-07 2014-07-23 密尔沃基电动工具公司 用于电动工具的驱动组件
EP3181300A1 (fr) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Machine-outil portative a percussion
EP3181298A1 (fr) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Machine-outil a percussion
EP3181301A1 (fr) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Machine-outil portative a percussion
EP3181299A1 (fr) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Machine-outil portative a percussion
EP2653270A3 (fr) * 2012-04-19 2017-08-09 HILTI Aktiengesellschaft Machine-outil manuelle et procédé de commande
EP4209306A1 (fr) * 2021-12-20 2023-07-12 Nanjing Chervon Industry Co., Ltd. Marteau perforateur
WO2023144032A1 (fr) * 2022-01-25 2023-08-03 Hilti Aktiengesellschaft Outil électrique
EP3496901B1 (fr) * 2016-08-09 2024-07-10 Hilti Aktiengesellschaft Machine-outil portative

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4382254A1 (fr) * 2022-12-07 2024-06-12 Hilti Aktiengesellschaft Mécanisme de percussion pour un outil électrique portatif et outil électrique portatif

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3932134A1 (de) * 1989-09-27 1991-04-04 Bosch Gmbh Robert Hammer mit luftfederschlagwerk
US5975217A (en) * 1997-04-07 1999-11-02 Hilti Aktiengesellschaft Tool for drilling and/or chiseling
US5992541A (en) * 1997-04-07 1999-11-30 Hilti Aktiengesellschaft Drilling and/or chiselling tool
US20030132015A1 (en) * 2001-04-28 2003-07-17 Gerhard Meixner Hammer drill and/or chipping hammer
US20040016558A1 (en) * 2001-11-16 2004-01-29 Frank Mueller Hand power tool with a pneumatic striking mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3932134A1 (de) * 1989-09-27 1991-04-04 Bosch Gmbh Robert Hammer mit luftfederschlagwerk
US5975217A (en) * 1997-04-07 1999-11-02 Hilti Aktiengesellschaft Tool for drilling and/or chiseling
US5992541A (en) * 1997-04-07 1999-11-30 Hilti Aktiengesellschaft Drilling and/or chiselling tool
US20030132015A1 (en) * 2001-04-28 2003-07-17 Gerhard Meixner Hammer drill and/or chipping hammer
US20040016558A1 (en) * 2001-11-16 2004-01-29 Frank Mueller Hand power tool with a pneumatic striking mechanism

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102083593B (zh) * 2008-05-07 2014-07-23 密尔沃基电动工具公司 用于电动工具的驱动组件
EP2500141A1 (fr) * 2011-03-18 2012-09-19 Makita Corporation Outil d'impact
CN102672681A (zh) * 2011-03-18 2012-09-19 株式会社牧田 冲击工具
US9010457B2 (en) 2011-03-18 2015-04-21 Makita Corporation Impact tool
CN102672681B (zh) * 2011-03-18 2016-01-06 株式会社牧田 冲击工具
EP2653270A3 (fr) * 2012-04-19 2017-08-09 HILTI Aktiengesellschaft Machine-outil manuelle et procédé de commande
EP2711137A1 (fr) * 2012-09-21 2014-03-26 Black & Decker Inc. Une perceuse à percussion
WO2017102431A1 (fr) * 2015-12-15 2017-06-22 Hilti Aktiengesellschaft Machine-outil portative à percussion
EP3181300A1 (fr) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Machine-outil portative a percussion
EP3181299A1 (fr) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Machine-outil portative a percussion
EP3181298A1 (fr) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Machine-outil a percussion
WO2017102437A1 (fr) * 2015-12-15 2017-06-22 Hilti Aktiengesellschaft Machine-outil portative à percussion
WO2017102429A1 (fr) * 2015-12-15 2017-06-22 Hilti Aktiengesellschaft Machine-outil portative à percussion
WO2017102418A1 (fr) * 2015-12-15 2017-06-22 Hilti Aktiengesellschaft Machine-outil à percussion
EP3181301A1 (fr) * 2015-12-15 2017-06-21 HILTI Aktiengesellschaft Machine-outil portative a percussion
US10675742B2 (en) 2015-12-15 2020-06-09 Hilti Aktiengesellschaft Striking hand-held machine tool
US10821590B2 (en) 2015-12-15 2020-11-03 Hilti Aktiengesellschaft Striking hand-held machine tool
US10821589B2 (en) 2015-12-15 2020-11-03 Hilti Aktiengesellschaft Percussive power tool
EP3496901B1 (fr) * 2016-08-09 2024-07-10 Hilti Aktiengesellschaft Machine-outil portative
EP4209306A1 (fr) * 2021-12-20 2023-07-12 Nanjing Chervon Industry Co., Ltd. Marteau perforateur
WO2023144032A1 (fr) * 2022-01-25 2023-08-03 Hilti Aktiengesellschaft Outil électrique
US11833652B2 (en) 2022-01-25 2023-12-05 Hilti Aktiengesellschaft Power tool

Also Published As

Publication number Publication date
DE502004011101D1 (de) 2010-06-10
EP1607187B1 (fr) 2010-04-28

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