EP2272630A2 - Dispositif de marteau électrique - Google Patents

Dispositif de marteau électrique Download PDF

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Publication number
EP2272630A2
EP2272630A2 EP10162073A EP10162073A EP2272630A2 EP 2272630 A2 EP2272630 A2 EP 2272630A2 EP 10162073 A EP10162073 A EP 10162073A EP 10162073 A EP10162073 A EP 10162073A EP 2272630 A2 EP2272630 A2 EP 2272630A2
Authority
EP
European Patent Office
Prior art keywords
piston
hammer
gap
unit
main
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.)
Withdrawn
Application number
EP10162073A
Other languages
German (de)
English (en)
Other versions
EP2272630A3 (fr
Inventor
Immanuel Werner
Harald Schindler
Gerhard Meixner
Juergen Schlipf
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 EP2272630A2 publication Critical patent/EP2272630A2/fr
Publication of EP2272630A3 publication Critical patent/EP2272630A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/068—Crank-actuated impulse-driving mechanisms
    • 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
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0023—Pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/21—Metals
    • B25D2222/42—Steel
    • 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
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other
    • 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
    • B25D2250/365—Use of seals

Definitions

  • the invention is based on an electrohammer device according to the preamble of claim 1.
  • An electric hammer device has already been proposed with a main sealing unit which is provided to counteract the escape of a fluid from a receiving region formed at least by a racket, a hammer tube and a piston.
  • the main seal unit is designed as a sealing ring made of rubber and touches the piston and the hammer tube.
  • the invention is based on an electrohammer device having at least one first main sealing unit, which is provided to counteract the escape of a fluid from a receiving region formed at least by a racket, a hammer tube and a piston.
  • the first main sealing unit is designed as a non-contact sealing unit.
  • a “main sealing unit, which is intended to counteract an escape of a fluid from a receiving area formed at least by a racket, a hammer tube and a piston” should be understood in particular a sealing unit, which is intended to be a major in operating operations To prevent the escape of the fluid from the receiving area by a certain space formed by the racket and / or the hammer tube and / or the piston.
  • the main obstacle counteracts the escape of the fluid from the receiving area through the gap more than any other obstacles, which differ in particular from parts of the piston, the hammer tube and the racket, which form an immediate boundary of the receiving area.
  • a “fluid” should be understood in particular gases or liquids.
  • a “hammer tube” is to be understood in particular as meaning a tube which is intended to guide a racket and a piston during at least one operating operation.
  • a “piston” is to be understood in particular as a component which is intended to transmit an impulse to the racket, preferably by means of an air cushion, during at least one operating operation.
  • a “racket” is to be understood in particular to mean a component which is intended to transmit a pulse to an anvil and / or a tool, preferably directly, in at least one operating procedure.
  • a “non-contact” sealing unit is intended in particular to be understood to mean a sealing unit which, when a gap between two components is sealed, leaves at least a portion of the intermediate space free of solids and preferably free of sealing liquids.
  • the electrohammer device comprises the hammer tube, and the hammer tube at least partially forms the first main seal unit.
  • the electrohammer device comprises the hammer tube, and the hammer tube at least partially forms the first main seal unit.
  • the electrohammer device comprises the racket and the racket at least partially forms the first main sealing unit. This allows a structurally simple design can be achieved.
  • the electrohammer device comprises the piston and the piston at least partially forms the first main sealing unit.
  • a cost-effective design and in particular a saving of components can be achieved.
  • a tool device in particular a drill and / or chisel hammer, proposed with at least one hammer tube, at least one piston and at least one non-contact seal unit first main seal unit, wherein the first main seal unit is at least partially formed by the piston and the hammer tube.
  • the first main seal unit has a gap with a gap width of 0.03 millimeters or less.
  • a "gap width” is to be understood in particular to mean a length of a longest stretch of a set of stretches which begin on a surface defining the gap and terminate on a surface opposite the surface which also delimits the gap and which perpendicular to at least one of the two surfaces.
  • the first main sealing unit has a gap with a gap length of more than 20 millimeters.
  • a “gap length” is to be understood in particular a maximum extension length of the gap along an axial direction of the piston and / or the hammer tube and / or the racket. In this way, a particularly high-quality sealing effect can be achieved.
  • the first main seal unit is designed as a gap seal, whereby a structurally simple design can be achieved.
  • At least one of the devices has at least one piston pin disposed with respect to a radial direction of the piston within the piston.
  • a piston pin is in particular a bolt be understood, which is fixed in an operating condition on the piston.
  • a "radial direction” of the piston is to be understood in particular a radial direction relative to an axis which intersects the center of mass of the piston and extends in a direction in which the piston is moved during an operation relative to a hammer tube and preferably with a Symmetryeachse the piston is identical with respect to a rotational symmetry.
  • At least one of the devices has at least one piston pin, which forms at least part of the non-contact sealing unit.
  • a high quality training of the main sealing unit can be achieved.
  • the non-contact sealing unit is designed as a gap seal, a particularly long maximum extension length of a gap of the gap seal in an axial direction can be achieved.
  • At least one of the devices has at least one eccentric drive unit, which is intended to drive the piston. This allows a structurally simple design can be achieved.
  • the hammer tube has an at least largely smooth inner tube surface.
  • a "pipe inner surface” should be understood in particular an entire surface of an inner side of the hammer tube.
  • a surface is “smooth” is to be understood in particular that the surface is formed free of corners and / or edges and / or elevations and / or depressions.
  • a "large part" of a tube inner surface is to be understood in particular as meaning a part of the tube inner surface which is at least fifty percent, preferably at least seventy percent, and especially preferably has at least ninety-nine percent of a total surface area of the pipe inner surface. This allows a structurally simple design can be achieved.
  • At least one of the devices has at least one second non-contact main seal unit, which has at least one component formed separately from the first main seal unit. This allows a particularly robust and particularly low-wear construction can be achieved.
  • the clubs and / or the piston and / or the hammer tube are at least partially formed of hardened and / or ground steel parts, whereby a low-wear operability can be achieved.
  • a drill and / or chisel hammer is proposed with at least one of the devices, whereby a robust and particularly durable design can be achieved.
  • FIG. 1 shows a partial section through a hammer drill, which has a tool device according to the invention, which is designed as an electric hammer device.
  • the electric hammer device comprises a hammer tube 14, a beater 12, and a piston 16 which form a receiving portion 18 which is filled with air in an operating condition forming an air cushion by means of which movements of the piston 16 along an axial direction 34 of the hammer tube 14 be transferred to the bat 12.
  • the electrohammer device has a first and a second main sealing unit 10, 30, which are both designed as gap seals and which seal the receiving region 18 against an escape of air.
  • the first main seal unit 10 is a gap 36 that is formed by the piston 16, which is different from a pot piston, and the hammer tube 14 and that of a surface 38 (FIG. FIGS. 1 and 2 ) of the piston, which has a shape of a circular cylinder jacket, and a surface 40 of the hammer tube 14, which is formed by a smooth pipe inner surface 28 of the hammer tube 14 and has a shape of a circular cylinder jacket is immediately limited.
  • a gap width 42 of the gap 36 is 0.03 millimeters.
  • a maximum extension length of the gap 36 along the axial direction 34 is about forty millimeters.
  • a grease medium is arranged, which is intended to reduce upon movement of the piston 16 along the axial direction 34, a coefficient of friction between the piston 16 and the hammer tube 14.
  • the second main seal unit 30 is a gap 44 formed by the beater 12 and the hammer tube 14 and formed by a surface 46 of the beater 12 having a shape of a circular cylinder jacket and the smooth tube inner surface 28 of the hammer tube 14.
  • a gap width of the gap 44 is 0.03 millimeters.
  • a maximum extension length of the gap 44 along the axial direction 34 is about fifty millimeters.
  • a grease medium is arranged, which is provided to reduce a coefficient of friction between the racket 12 and the hammer tube 14 during a movement of the racket 12 along the axial direction 34.
  • the tool device has a piston pin 22, which is arranged with respect to a radial direction 24 of the piston 16 within the piston 16.
  • the radial direction 24 is perpendicular to the axial direction 34 and further forms an axial direction of the hammer tube 14.
  • the piston pin 22 is fixed to the piston 16 and is received in a receiving portion 50 of the piston 16, whereby the piston pin 22 in the radial direction 24 completely surrounded by the piston 16.
  • a longitudinal direction of the piston pin 22 is parallel to the radial direction 24.
  • a connecting rod 52 is rotatably supported about an axis which is parallel to the longitudinal direction of the piston pin 22.
  • the tool device has an eccentric drive unit 26, which moves the piston 16 along the axial direction 34 during operation of the rotary hammer and which has the connecting rod 52.
  • the piston 16 and the beater 12 are guided along the axial direction 34 of the hammer tube 14 in an operation of the hammer drill, in which the piston 16 and the beater 12 are moved relative to the hammer tube 14.
  • FIG. 3 an alternative embodiment is shown. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the embodiments, however, the reference numerals of the embodiment in FIG. 3 the letter "a" added. The following description is essentially limited to the differences from the embodiment in the FIGS. 1 and 2 , wherein with respect to the same components, features and functions on the description of the embodiment in the FIGS. 1 and 2 can be referenced.
  • FIG. 3 shows an alternative embodiment of a tooling device, which has a first main seal unit 10a formed as a gap seal, a hammer tube 14a, a piston 16a and a piston pin 22a.
  • the gap seal is formed by a gap 36a formed by the hammer tube 14a and a member 54a having the piston 16a and the piston pin 22a.
  • the gap 36a is on one side of a pipe inner surface 28a of the hammer pipe 14a and on a second side of a surface 38a of the piston 16a formed by an end surface of the piston 16a with respect to a radial direction 24a and an end surface 56a of the piston pin 22a having a shape of a cylinder barrel.
  • the piston pin 22a is pressed into the piston 16a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Catching Or Destruction (AREA)
EP10162073.0A 2009-07-06 2010-05-06 Dispositif de marteau électrique Withdrawn EP2272630A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910027469 DE102009027469A1 (de) 2009-07-06 2009-07-06 Werkzeugvorrichtung

Publications (2)

Publication Number Publication Date
EP2272630A2 true EP2272630A2 (fr) 2011-01-12
EP2272630A3 EP2272630A3 (fr) 2013-05-22

Family

ID=42931932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10162073.0A Withdrawn EP2272630A3 (fr) 2009-07-06 2010-05-06 Dispositif de marteau électrique

Country Status (3)

Country Link
EP (1) EP2272630A3 (fr)
CN (1) CN101941198A (fr)
DE (1) DE102009027469A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2857149A1 (fr) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle
EP2634385B1 (fr) 2012-02-29 2016-05-25 MAHLE International GmbH Arbre à came réglable
EP3117962A1 (fr) * 2015-07-17 2017-01-18 HILTI Aktiengesellschaft Machine-outil portative
EP3822038A1 (fr) * 2019-11-15 2021-05-19 Black & Decker Inc. Piston

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012208986A1 (de) * 2012-05-29 2013-12-05 Hilti Aktiengesellschaft Meißelnde Werkzeugmaschine
DE102013212527A1 (de) * 2013-06-27 2014-12-31 Robert Bosch Gmbh Schlagwerkkolbenvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19726272A1 (de) * 1997-06-20 1999-01-07 Wacker Werke Kg Einseitiges Luftfeder-Schlagwerk mit Leerlaufzustand
DE10346534A1 (de) * 2003-10-07 2005-05-12 Bosch Gmbh Robert Handwerkzeugmaschine mit einem Schlagwerk sowie Verfahren zum Betreiben der Handwerkzeugmaschine
EP1931502A1 (fr) * 2005-09-07 2008-06-18 Peterstow Holdings Limited Unité d impulsions actionnée par énergie hydraulique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511082A1 (de) * 1975-03-13 1976-09-23 Duss Maschf Elektromotorisch angetriebener hammer mit einem die schmierbeduerftigen teile enthaltenden gehaeuseraum
DE10103141A1 (de) * 2001-01-24 2002-07-25 Hilti Ag Elektrohandwerkzeuggerät mit Leerschlagabschaltung
JP2006297500A (ja) * 2005-04-15 2006-11-02 Hitachi Koki Co Ltd 打撃工具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19726272A1 (de) * 1997-06-20 1999-01-07 Wacker Werke Kg Einseitiges Luftfeder-Schlagwerk mit Leerlaufzustand
DE10346534A1 (de) * 2003-10-07 2005-05-12 Bosch Gmbh Robert Handwerkzeugmaschine mit einem Schlagwerk sowie Verfahren zum Betreiben der Handwerkzeugmaschine
EP1931502A1 (fr) * 2005-09-07 2008-06-18 Peterstow Holdings Limited Unité d impulsions actionnée par énergie hydraulique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2634385B1 (fr) 2012-02-29 2016-05-25 MAHLE International GmbH Arbre à came réglable
EP2857149A1 (fr) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle
WO2015049130A1 (fr) * 2013-10-03 2015-04-09 Hilti Aktiengesellschaft Machine-outil manuelle
EP3117962A1 (fr) * 2015-07-17 2017-01-18 HILTI Aktiengesellschaft Machine-outil portative
WO2017012915A1 (fr) * 2015-07-17 2017-01-26 Hilti Aktiengesellschaft Machine-outil portative
EP3822038A1 (fr) * 2019-11-15 2021-05-19 Black & Decker Inc. Piston
US20210146520A1 (en) * 2019-11-15 2021-05-20 Black & Decker Inc. Piston

Also Published As

Publication number Publication date
CN101941198A (zh) 2011-01-12
DE102009027469A1 (de) 2011-01-13
EP2272630A3 (fr) 2013-05-22

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