EP1862266A2 - Hammer hand tool with axially flexible impact mechanism - Google Patents

Hammer hand tool with axially flexible impact mechanism Download PDF

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Publication number
EP1862266A2
EP1862266A2 EP07108103A EP07108103A EP1862266A2 EP 1862266 A2 EP1862266 A2 EP 1862266A2 EP 07108103 A EP07108103 A EP 07108103A EP 07108103 A EP07108103 A EP 07108103A EP 1862266 A2 EP1862266 A2 EP 1862266A2
Authority
EP
European Patent Office
Prior art keywords
housing
hand tool
spring
axially
tool according
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
EP07108103A
Other languages
German (de)
French (fr)
Other versions
EP1862266A3 (en
EP1862266B1 (en
Inventor
Josef Fünfer
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 EP1862266A2 publication Critical patent/EP1862266A2/en
Publication of EP1862266A3 publication Critical patent/EP1862266A3/en
Application granted granted Critical
Publication of EP1862266B1 publication Critical patent/EP1862266B1/en
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
    • 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
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/21—Metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • 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
    • B25D2250/065—Details regarding assembling of the tool
    • 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
    • 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
    • B25D2250/371—Use of springs
    • 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
    • B25D2250/371—Use of springs
    • B25D2250/381—Leaf springs

Definitions

  • the invention refers to a beating hand tool with an axially movably mounted hammer mechanism, in particular a chisel hammer or a combination hammer.
  • the striking mechanism is firmly mounted in the housing in a striking hand tool. Any vibrations caused by the impact mechanism are therefore transmitted directly to the housing.
  • GB2154497 has a hand tool with a housing axially movably mounted percussion tool side an axial slide bearing and the handle side, a rubber guide and an axial compression coil spring, according to the W09319899 a rubber bearing on the handle side. Due to the rubber guide or rubber mount, the axial range available for axial oscillations is relatively narrow.
  • US4673043 is a beating hand tool with a parallelogram over two parallelogram mounted axially movable impact mechanism, which according to the DE20109122U is connected via an axial leaf spring to the housing.
  • the two transverse articulated arms made of sheet steel are formed with foil joints and the striking mechanism is connected via an axial helical compression spring to the housing.
  • the object of the invention is the compact realization of a striking power tool with a housing mounted axially movable over a relatively wide axial range percussion.
  • an at least partially axially striking hand tool with a tool holder and with a handle, which is fixed to a housing, in an axially movably mounted percussion axially connected on the handle side by a spring to the housing, at least one grip side transversely extending articulated arm, wherein the impact mechanism is mounted on the receiving side via a Axialgleit Structure in the housing.
  • the percussion is mounted axially movable over a relatively wide axial region, wherein the storage side taking place particularly space-saving and thus the hand tool is made particularly compact.
  • the Axialgleit Structure is mounted on sliding inserts in the housing, further advantageous over plastic sliding inserts with intrinsic lubricants, which is achieved by a combination of materials: metal-plastic a tribologically low-wear high / low profile characteristic.
  • a plurality of similar sliding inserts are present, which are also advantageously easy to assemble / disassemble, making them economically cheap to stock as well as easy to replace when worn.
  • the articulated arm is designed as a leaf spring, more advantageously made of sheet steel, whereby this is economically produced by a punching process and highly elastic and free of wear.
  • the spring is designed as a spiral compression spring, whereby over the relatively wide axial region a substantially constant spring characteristic is present, which excites no harmonics.
  • the impact mechanism is part of a rigid assembly with a gear and further advantageous with an electric motor, which in this oscillating assembly, the mass is increased, which is favorable for the vibration damping.
  • a hand tool machine 1 axially hammering along an axis A has a tool holder 2 and a hang grip 3, which is secured to a housing 4.
  • an axially movably mounted striking mechanism 5 is axially connected to the housing 4 via a spring 6 in the form of a helical compression spring.
  • the axially movably mounted striking mechanism 5 is connected to the handle side via a transverse articulated arm 7 in the form of a leaf spring made of spring steel sheet with the housing 4 and stored on the receiving side via a Axialgleit Structure 8 made of metal on plastic liners 9 with intrinsic lubricants in the housing 4.
  • the striking mechanism 4 is part of a rigid assembly 14 with a gear 12 and an electric motor 13.
  • Fig. 2 which is formed in cross-section as a convex triangle Axialgleit Structure 8 of the striking mechanism 5 (the other details were not shown) via three circumferentially distributed sliding inserts 9, of which two identically shaped each mounted on mounting plates 10 and screws 11 on the housing 4 ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

The tool has a tool fitting (2) and a hand grip (3) which is fixed at the housing (4) in which an axially movable percussion mechanism (5) is connected with the housing, axial grip-sided, by a spring (6). The percussion mechanism is mounted in the housing, fitting-sided, by an axial sliding surface (8). The axial sliding surface is mounted in the housing by a gliding insert (9), where the multiple similar gliding insert are available.

Description

Die Erfindung bezeichnet eine schlagende Handwerkzeugmaschine mit einem im Gehäuse axial beweglich gelagerten Schlagwerk, insbesondere einen Meisselhammer oder einen Kombihammer.The invention refers to a beating hand tool with an axially movably mounted hammer mechanism, in particular a chisel hammer or a combination hammer.

Üblicherweise wird bei einer schlagenden Handwerkzeugmaschine das Schlagwerk fest im Gehäuse montiert. Vom Schlagwerk allfällig verursachte Vibrationen werden daher direkt auf das Gehäuse übertragen.Usually, the striking mechanism is firmly mounted in the housing in a striking hand tool. Any vibrations caused by the impact mechanism are therefore transmitted directly to the housing.

Nach der GB2154497 weist eine Handwerkzeugmaschine mit einem im Gehäuse axial beweglich gelagertem Schlagwerk werkzeugseitig eine axiale Gleitlagerung und griffseitig eine Gummiführung sowie eine axiale Spiraldruckfeder auf, nach der W09319899 griffseitig ein Gummilager. Durch die Gummiführung bzw. Gummilager ist der für Axialschwingungen verfügbare bewegliche Axialbereich relativ schmal.After GB2154497 has a hand tool with a housing axially movably mounted percussion tool side an axial slide bearing and the handle side, a rubber guide and an axial compression coil spring, according to the W09319899 a rubber bearing on the handle side. Due to the rubber guide or rubber mount, the axial range available for axial oscillations is relatively narrow.

Nach der US4673043 ist eine schlagende Handwerkzeugmaschine mit einem über zwei Parallelogrammgelenke axial beweglich gelagerten Schlagwerk bekannt, welches nach der DE20109122U über eine axiale Blattfeder mit dem Gehäuse verbunden ist. Nach der DE10255162 sind die beiden quer verlaufenden Gelenkarme aus Stahlblech mit Foliengelenken ausgebildet und das Schlagwerk ist über eine axiale Spiraldruckfeder mit dem Gehäuse verbunden. Durch eine derartige Lagerung werden Axialschwingungen des Gehäuses über einen relativ weiten Axialbereich ermöglichst.After US4673043 is a beating hand tool with a parallelogram over two parallelogram mounted axially movable impact mechanism, which according to the DE20109122U is connected via an axial leaf spring to the housing. After DE10255162 the two transverse articulated arms made of sheet steel are formed with foil joints and the striking mechanism is connected via an axial helical compression spring to the housing. By such storage axial vibrations of the housing over a relatively wide axial range ermöglichst.

Die Aufgabe der Erfindung besteht in der kompakten Realisierung einer schlagenden Handwerkzeugmaschine mit einem im Gehäuse über einen relativ weiten Axialbereich axial beweglich gelagerten Schlagwerk.The object of the invention is the compact realization of a striking power tool with a housing mounted axially movable over a relatively wide axial range percussion.

Die Aufgabe wird im Wesentlichen durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.The object is essentially achieved by the features of claim 1. Advantageous developments emerge from the subclaims.

So weist eine zumindest teilweise axial schlagende Handwerkzeugmaschine mit einer Werkzeugaufnahme und mit einem Hangriff, welcher an einem Gehäuse festgelegt ist, in dem ein axial beweglich gelagertes Schlagwerk axial griffseitig über eine Feder mit dem Gehäuse verbunden ist, zumindest einen griffseitig quer verlaufenden Gelenkarm auf, wobei das Schlagwerk aufnahmeseitig über eine Axialgleitfläche im Gehäuse gelagert ist.Thus, an at least partially axially striking hand tool with a tool holder and with a handle, which is fixed to a housing, in an axially movably mounted percussion axially connected on the handle side by a spring to the housing, at least one grip side transversely extending articulated arm, wherein the impact mechanism is mounted on the receiving side via a Axialgleitfläche in the housing.

Durch die aufnahmeseitige Gleitlagerung und den griffseitigen Gelenkarm ist das Schlagwerk über einen relativ weiten Axialbereich axial beweglich gelagert, wobei aufnahmeseitig die Lagerung besonders raumsparend erfolgt und somit die Handwerkzeugmaschine besonders kompakt ausgebildet ist.By the receiving side plain bearing and the handle-side articulated arm the percussion is mounted axially movable over a relatively wide axial region, wherein the storage side taking place particularly space-saving and thus the hand tool is made particularly compact.

Vorteilhaft ist die Axialgleitfläche über Gleiteinsätze im Gehäuse gelagert, weiter vorteilhaft über Gleiteinsätze aus Kunststoff mit intrinsischen Schmiermitteln, wodurch durch eine Werkstoffpaarung: Metall-Kunststoff eine tribologisch verschleissarme Hochlage/Tieflage Charakteristik erzielt wird.Advantageously, the Axialgleitfläche is mounted on sliding inserts in the housing, further advantageous over plastic sliding inserts with intrinsic lubricants, which is achieved by a combination of materials: metal-plastic a tribologically low-wear high / low profile characteristic.

Vorteilhaft sind mehrere gleichartige Gleiteinsätze vorhanden, die weiter vorteilhaft einfach montierbar/demontierbar sind, wodurch diese ökonomisch günstig zu bevorraten sowie bei Verschleiss einfach ersetzbar sind.Advantageously, a plurality of similar sliding inserts are present, which are also advantageously easy to assemble / disassemble, making them economically cheap to stock as well as easy to replace when worn.

Vorteilhaft ist der Gelenkarm als Blattfeder ausgebildet, weiter vorteilhaft aus Stahlblech, wodurch dieser über ein Stanzverfahren ökonomisch herstellbar sowie hoch elastisch und verschleissfrei ist.Advantageously, the articulated arm is designed as a leaf spring, more advantageously made of sheet steel, whereby this is economically produced by a punching process and highly elastic and free of wear.

Vorteilhaft ist die Feder als Spiraldruckfeder ausgebildet, wodurch über den relativ weiten Axialbereich eine weitgehend konstante Federcharakteristik vorliegt, die keine Oberschwingungen anregt.Advantageously, the spring is designed as a spiral compression spring, whereby over the relatively wide axial region a substantially constant spring characteristic is present, which excites no harmonics.

Vorteilhaft ist das Schlagwerk ein Teil einer in sich steifen Baugruppe mit einem Getriebe und weiter vorteilhaft mit einem Elektromotor, wodurch in dieser schwingenden Baugruppe die Masse erhöht wird, was günstig für die Vibrationsdämpfung ist.Advantageously, the impact mechanism is part of a rigid assembly with a gear and further advantageous with an electric motor, which in this oscillating assembly, the mass is increased, which is favorable for the vibration damping.

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit:

  • Fig. 1 als teilweise längsgeschnittene Handwerkzeugmaschine
  • Fig. 2 als Querschnitt (Linie II - II in Fig. 1)
The invention will be explained in more detail with respect to an advantageous embodiment with:
  • Fig. 1 as a partially longitudinally cut hand tool
  • 2 as a cross section (line II - II in Fig. 1)

Nach Fig. 1 weist eine längs einer Achse A axial schlagende Handwerkzeugmaschine 1 eine Werkzeugaufnahme 2 und einen Hangriff 3 auf, welcher an einem Gehäuse 4 festgelegt ist.According to FIG. 1, a hand tool machine 1 axially hammering along an axis A has a tool holder 2 and a hang grip 3, which is secured to a housing 4.

In dem Gehäuse 4 ist ein axial beweglich gelagertes Schlagwerk 5 axial griffseitig über eine Feder 6 in Form einer Spiraldruckfeder mit dem Gehäuse 4 verbunden. Das axial beweglich gelagerte Schlagwerk 5 ist griffseitig über einen quer verlaufenden Gelenkarm 7 in Form einer Blattfeder aus Federstahlblech mit dem Gehäuse 4 verbunden und aufnahmeseitig über eine Axialgleitfläche 8 aus Metall über Gleiteinsätze 9 aus Kunststoff mit intrinsischen Schmiermitteln im Gehäuse 4 gelagert. Das Schlagwerk 4 ist dabei ein Teil einer in sich steifen Baugruppe 14 mit einem Getriebe 12 und mit einem Elektromotor 13.In the housing 4, an axially movably mounted striking mechanism 5 is axially connected to the housing 4 via a spring 6 in the form of a helical compression spring. The axially movably mounted striking mechanism 5 is connected to the handle side via a transverse articulated arm 7 in the form of a leaf spring made of spring steel sheet with the housing 4 and stored on the receiving side via a Axialgleitfläche 8 made of metal on plastic liners 9 with intrinsic lubricants in the housing 4. The striking mechanism 4 is part of a rigid assembly 14 with a gear 12 and an electric motor 13.

Nach Fig. 2 ist die im Querschnitt als konvexes Dreieck ausgebildete Axialgleitfläche 8 des Schlagwerks 5 (die weiteren Einzelheiten wurden nicht dargestellt) über drei umlaufend verteilte Gleiteinsätze 9 gelagert, von denen zwei gleichartig ausgeformte jeweils über Montagebleche 10 und Schrauben 11 am Gehäuse 4 montiert sind.According to Fig. 2 which is formed in cross-section as a convex triangle Axialgleitfläche 8 of the striking mechanism 5 (the other details were not shown) via three circumferentially distributed sliding inserts 9, of which two identically shaped each mounted on mounting plates 10 and screws 11 on the housing 4 ,

Claims (6)

Zumindest teilweise axial schlagende Handwerkzeugmaschine mit einer Werkzeugaufnahme (2) und mit einem Hangriff (3), welcher an einem Gehäuse (4) festgelegt ist, in dem ein axial beweglich gelagertes Schlagwerk (5) axial griffseitig über eine Feder (6) mit dem Gehäuse (4) verbunden ist, zumindest einen griffseitig quer verlaufenden Gelenkarm (7) auf, dadurch gekennzeichnet, dass das Schlagwerk (5) aufnahmeseitig über eine Axialgleitfläche (8) im Gehäuse (4) gelagert ist.At least partially axially striking hand tool with a tool holder (2) and with a handle (3), which is fixed to a housing (4), in which an axially movably mounted percussion (5) axially on the handle side via a spring (6) with the housing (4), at least one handle side transversely extending articulated arm (7), characterized in that the striking mechanism (5) is mounted on the receiving side via a Axialgleitfläche (8) in the housing (4). Handwerkzeugmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Axialgleitfläche (8) über Gleiteinsätze (9) im Gehäuse (4) gelagert ist.Powered hand tool according to claim 1, characterized in that the Axialgleitfläche (8) via sliding inserts (9) in the housing (4) is mounted. Handwerkzeugmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mehrere gleichartige Gleiteinsätze (9) vorhanden sind.Powered hand tool according to claim 1 or 2, characterized in that a plurality of similar sliding inserts (9) are present. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Gelenkarm (7) als Blattfeder ausgebildet ist.Powered hand tool according to one of claims 1 to 3, characterized in that the articulated arm (7) is designed as a leaf spring. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Feder (6) als Spiraldruckfeder ausgebildet ist.Powered hand tool according to one of claims 1 to 4, characterized in that the spring (6) is designed as a spiral compression spring. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Schlagwerk (4) ein Teil einer in sich steifen Baugruppe mit einem Getriebe (12) ist.Powered hand tool according to one of claims 1 to 5, characterized in that the striking mechanism (4) is part of a rigid assembly with a gear (12).
EP07108103A 2006-05-30 2007-05-14 Hammer hand tool with axially flexible impact mechanism Active EP1862266B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006000253A DE102006000253A1 (en) 2006-05-30 2006-05-30 Striking hand tool with axially movable percussion

Publications (3)

Publication Number Publication Date
EP1862266A2 true EP1862266A2 (en) 2007-12-05
EP1862266A3 EP1862266A3 (en) 2009-03-11
EP1862266B1 EP1862266B1 (en) 2011-01-19

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ID=38480645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07108103A Active EP1862266B1 (en) 2006-05-30 2007-05-14 Hammer hand tool with axially flexible impact mechanism

Country Status (3)

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US (1) US20070277992A1 (en)
EP (1) EP1862266B1 (en)
DE (2) DE102006000253A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012084349A1 (en) * 2010-12-21 2012-06-28 Robert Bosch Gmbh Portable power tool

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5361504B2 (en) * 2009-04-10 2013-12-04 株式会社マキタ Impact tool
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
EP3501750A1 (en) * 2017-12-19 2019-06-26 Hilti Aktiengesellschaft Vibration-dampened hand-held machine tool
WO2019147919A1 (en) 2018-01-26 2019-08-01 Milwaukee Electric Tool Corporation Percussion tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1151827A1 (en) * 2000-05-02 2001-11-07 HILTI Aktiengesellschaft Hand tool with electrical percussion system
EP1422029A1 (en) * 2002-11-22 2004-05-26 HILTI Aktiengesellschaft Vibration decoupled percussion mechanism assembly
DE202005007333U1 (en) * 2004-05-21 2005-09-08 Chen, Hsiu-Ju, Nantuen Chiu Air intake control assembly for pneumatic tool

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Publication number Priority date Publication date Assignee Title
DE19730356C2 (en) * 1997-07-15 2001-05-17 Wacker Werke Kg Vibration-damped breaker and / or hammer drill
DE19832946A1 (en) * 1998-07-22 2000-01-27 Hilti Ag Hand drill with air-powered hammer mechanism
DE19839963A1 (en) * 1998-09-02 2000-03-09 Hilti Ag Power tool
DE50112450D1 (en) * 2001-10-15 2007-06-14 Hilti Ag Cooling air duct for an electric hand tool with electro-pneumatic impact mechanism
US7527107B2 (en) * 2003-07-15 2009-05-05 Wacker Construction Equipment Ag Working tool with damped handle
DE10357758A1 (en) * 2003-12-10 2005-07-21 Wacker Construction Equipment Ag Break-away and / or rotary hammer with linearly guided grip device
DE102005038091A1 (en) * 2005-08-11 2007-02-15 Hilti Ag Hand tool with vibration reduction
DE102007000093A1 (en) * 2007-02-15 2008-08-21 Hilti Ag Hand tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1151827A1 (en) * 2000-05-02 2001-11-07 HILTI Aktiengesellschaft Hand tool with electrical percussion system
EP1422029A1 (en) * 2002-11-22 2004-05-26 HILTI Aktiengesellschaft Vibration decoupled percussion mechanism assembly
DE202005007333U1 (en) * 2004-05-21 2005-09-08 Chen, Hsiu-Ju, Nantuen Chiu Air intake control assembly for pneumatic tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012084349A1 (en) * 2010-12-21 2012-06-28 Robert Bosch Gmbh Portable power tool

Also Published As

Publication number Publication date
DE502007006283D1 (en) 2011-03-03
DE102006000253A1 (en) 2007-12-06
US20070277992A1 (en) 2007-12-06
EP1862266A3 (en) 2009-03-11
EP1862266B1 (en) 2011-01-19

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