EP2207644A1 - Machine-outil à main - Google Patents

Machine-outil à main

Info

Publication number
EP2207644A1
EP2207644A1 EP08803493A EP08803493A EP2207644A1 EP 2207644 A1 EP2207644 A1 EP 2207644A1 EP 08803493 A EP08803493 A EP 08803493A EP 08803493 A EP08803493 A EP 08803493A EP 2207644 A1 EP2207644 A1 EP 2207644A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
tool according
damping
racket
damping element
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Withdrawn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
EP08803493A
Other languages
German (de)
English (en)
Inventor
Gerhard Meixner
Thomas Bernhardt
Andreas Strasser
Tobias Herr
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 EP2207644A1 publication Critical patent/EP2207644A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber
    • 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

Definitions

  • the invention relates to a hand tool according to the preamble of claim 1.
  • Hand tool machines in particular drill and chisel hammers, are already known, which have a percussion unit with a racket, an impact device and a damping device for a percussion device for damping a B impact of the percussion device.
  • the invention relates to a hand tool, in particular a drill and / or chisel, with a Schlagtechnikinheit having at least a racket and a percussion means, and with a damping device for the percussion means for damping a B-stroke of the percussion means.
  • the damping device has at least one axial covering area with the racket in at least one operating mode.
  • a "percussion unit” is to be understood here in particular as a unit which has at least one component, such as a percussion device, a hammer tube, a pot piston and / or a racket, which is involved in generating and / or transmitting a pulse to a tool
  • a "damping device” in particular defines a device which generates a shock pulse, preferably of a percussive medium, by more than 10%, preferably by more than 50%, and ideally by more than 90% reduced.
  • the damping device can be composed of several elements with different damping properties.
  • the "percussion means” is preferably a striker or an anvil and is advantageously a means separate from the racket, but the percussion means could also be a racket.
  • "Percussion” is intended herein to mean, in particular, a percussion, advantageously the impact of the percussion means on a tool shank opposing blow, be understood, the blow means learns.
  • the B-stroke is formed by a pulse which, after a striking movement directed towards a tool shank by the striking means, arises as a counter-pulse from the tool shank to the striking means.
  • an "operating mode" in particular defines an arrangement of the components of the percussion unit and / or of a tool which defines a possible function, such as drilling, chiselling and / or idling, of the handheld power tool be understood a region in which the damping device and the racket overlap in the axial direction or by at least one perpendicular to the axial direction plane is present, which extends through both the racket and by the damping device.
  • the damping device and the racket viewed in the axial direction, at least partially arranged parallel to each other.
  • the operating mode is an idle position.
  • an “idle position” is to be understood in particular an operation of the power tool in which at least one motor of the power tool is in operation, but in which the tool in particular no impact pulses, and in particular due to the fact that the tool is still arranged outside a stroke position
  • the motor and the tool are decoupled.
  • the damping device has at least one damping element with an extension region which has at least one inner diameter that is at least as large as an inner diameter of a hammer tube.
  • An "extension region” is to be understood here as meaning, in particular, at least a partial region of the damping element that extends in the axial direction Direction of the power tool extends and / or has an axial length which is at least 10% of the damping element.
  • the damping element is preferably formed by a spring-elastic element, such as an elastomer, a coil spring and / or another spring-elastic element which appears to be suitable for the person skilled in the art.
  • a spring-elastic element such as an elastomer, a coil spring and / or another spring-elastic element which appears to be suitable for the person skilled in the art.
  • the term "resilient element” is to be understood here as meaning, in particular, an element which absorbs energy under a reversible deformation and releases it again, wherein the deformation is preferably greater than 2% of a longitudinal extent of the damping element a cost-effective damping element can be provided.
  • the damping element is designed as a ring, whereby the B-blow can be structurally easily damped.
  • extension region is arranged in the axial direction on a side facing the tool holder of the racket. This can be a
  • the hammer tube has a recess in which the damping device is at least partially arranged.
  • the recess preferably receives in its axial length and / or its radial depth at least one damping element of the damping device, at least for the most part, and / or the damping element is arranged at least 50% of its volume within the recess.
  • the recess advantageously extends in a circumferential direction completely around a percussion component, such as the racket.
  • a transmission element is arranged, which is provided for an at least partial transmission of the B-stroke from the impact means on the damping element.
  • an element is preferably to be used under a "transmission element”. stood, which is intended to selectively transmit a pulse to the damping element.
  • the transmission element itself may be formed by a damping element or an element which is substantially rigid with respect to the damping element.
  • the transmission element is arranged in the axial direction on a side facing away from the racket side of the damping element, whereby the pulse transmission can be structurally simple.
  • the transmission element is formed by a support ring and / or a support disk.
  • a space-saving and / or cost-effective design can be achieved.
  • the striking mechanism unit has a pipe component which is provided for guiding the racket in the covering area.
  • a "pipe component” is to be understood here as meaning an element which is arranged and / or guided in a hammer pipe, the hammer pipe being provided for guiding the element along a direction of impact during operation of the handheld power tool.
  • the arrangement of the tube component makes it possible to achieve improved guidance of the racket, Furthermore, the length of the recess for the damping element can be designed independently of a required sliding surface of the racket, in particular in a percussion mode Furthermore, the pipe component may be a pot piston, whereby a flexible design of the striking mechanism can be achieved.
  • a preferred development consists in that a damping element is arranged at least partially radially outside of the pot piston. As a result, structurally simple wear-free mounting of the damping element and variable damping can be provided.
  • FIG. 2b shows the hammer mechanism unit with a damping device in a sectional view in an idling position
  • Fig. 3 is a section along the line III-III through the percussion unit and the
  • FIG. 4a shows the percussion unit with an alternative damping device in a sectional view in a working position
  • Fig. 4b the percussion unit with an alternative damping device in a sectional view in an idle positions.
  • FIG. 1 shows a hand tool 10a according to the invention in the form of a hammer drill with a housing 58a, a main handle 60a and a motor unit 62a.
  • a percussion unit 12a is further arranged, which has a hammer tube 30a, a racket 14a, a percussion means 16a in the form of a firing pin (see Figure 2a and 2b).
  • the racket 14a and the percussion means 16a are movably guided in the hammer tube 30a and the percussion means 16a is arranged in the axial direction 32a towards a tool holder 34a towards the racket 14a.
  • a momentum transfer of a strike is made from the motor unit 62a via the racket 14a to the percussion means 16a and from the percussion means 16a to a tool shank of a tool 64a.
  • the percussion means 16a undergoes the impulse Transmission of the impact of a so-called B-blow, ie a blow directed against the impact of the impact means 16a on the tool shank of the tool 64a.
  • B-blow so-called B-blow
  • a counter-pulse is generated from the tool shank of the tool 64a on the striking means 16a.
  • a damping device 18a for the
  • Impact means 16a arranged.
  • the damping device 18a comprises a damping element 22a, a transmission element 40a and, in at least one operating mode, namely in the neutral position (see FIG. 2b), has an axial covering region 20a with the beater 14a.
  • the racket 14a and the damping device 18a with their overlapping area 20a and the damping element 22a, viewed in the axial direction 32a towards the tool holder 34a, are arranged parallel to one another.
  • the overlapping area 20a comprises at least 90% of the damping device 18a, or the club 14a moves over at least 95% of its movement into the neutral position along the axial direction 32a
  • the damping device 18a or the damping element 22a has an extension region 24a which has an inner diameter 26a which is as large as an inner diameter 28a of the hammer tube 30a.
  • the extension area 24a is arranged in the axial direction 32a on a side 36a of the racket 14a, which faces the tool holder 34a.
  • a recess 38a is formed in the hammer tube 30a, in which the damping device 18a is arranged.
  • the recess 38a has an axial length 68a, which corresponds to the length of the damping device 18a.
  • the recess 38a has the same radial depth 70a as the damping element 22a. Furthermore, the recess extends
  • the damping element 22a is formed by a resilient element 46a formed of an elastomer 48a, which is in the form of a ring 50a disposed in the recess 38a.
  • the transmission element 40a of the damping device 18a which at least partially
  • Transmission of the B-beat from the impact means 16a is provided on the damping element 22a, is arranged in the axial direction 32a on a side facing away from the racket 14a side 42a of the damping element 22a and is formed by a support plate 44a.
  • the transmission element 40a protrudes, against a radial direction 56a, from the hammer tube 30a toward the racket 14a, into a movement space 74a of the percussion means 16a and limits a movement of the percussion means 16a caused by the B impact in the direction opposite to the axial direction 32a.
  • the striking means 16a has a reduced area 78a in its diameter 76a.
  • FIGS. 4 a and 4 b show an alternative exemplary embodiment of the handheld power tool 1 oa or the percussion mechanism unit 12 a. Essentially, the same components, features and functions are always numbered the same. For distinction of the embodiments, however, the reference numerals of the embodiments are the
  • Figures 4a and 4b show a percussion unit 12b with a racket 14b, a percussion means 16b and a damper device 18b for the percussion means 16b, wherein the damper device 18b is provided for damping a B-impact of the percussion means 16b.
  • the damping device 18b is composed of a damping element 22b and a transmission element 40b and has at least one operating mode, namely an idling position
  • the damping element 22b is formed by a coil spring 52b, which is arranged in a recess 38b and surrounds the racket 14b in the circumferential direction 72b. Furthermore, the striking mechanism unit 12b has a tube component 54b, which is provided for guiding the racket 14b in a covering area 20b. To achieve optimum sliding properties of the racket 14b in an impact position of the percussion unit 12b (see Figure 4a), the tube component 54b provides a sliding surface 80b which serves to extend the guide area 82b by a length 84b.
  • the damping element 22b or the steel coil spring 52b is arranged in the radial direction 56b, viewed from the racket 14b in the direction of the hammer tube 30b, outside the tube component 54b and surrounds the tube component 54b in the circumferential direction 72b.

Landscapes

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

Abstract

L'invention concerne une machine-outil à main, en particulier un marteau perforateur et/ou burineur, comprenant : une unité de percussion (12a), qui présente au moins un frappeur (14a) et un élément frappé (16a) ; et un dispositif d'amortissement (18a) pour l'élément frappé (16a), afin d'amortir une frappe en B de l'élément frappé (16a) avec une unité de percussion. Selon l'invention, le dispositif d'amortissement (18a) présente, dans au moins un mode de fonctionnement, une région de recouvrement axial (20a) avec le frappeur (14a).
EP08803493A 2007-10-08 2008-09-02 Machine-outil à main Withdrawn EP2207644A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007048262A DE102007048262A1 (de) 2007-10-08 2007-10-08 Handwerkzeugmaschine
PCT/EP2008/061517 WO2009047052A1 (fr) 2007-10-08 2008-09-02 Machine-outil à main

Publications (1)

Publication Number Publication Date
EP2207644A1 true EP2207644A1 (fr) 2010-07-21

Family

ID=40086111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08803493A Withdrawn EP2207644A1 (fr) 2007-10-08 2008-09-02 Machine-outil à main

Country Status (6)

Country Link
US (1) US20100294525A1 (fr)
EP (1) EP2207644A1 (fr)
CN (1) CN101821061A (fr)
DE (1) DE102007048262A1 (fr)
RU (1) RU2010118016A (fr)
WO (1) WO2009047052A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110355728B (zh) * 2018-04-11 2023-03-17 株式会社牧田 冲击工具
EP3822036A1 (fr) * 2019-11-12 2021-05-19 Hilti Aktiengesellschaft Agencement de mécanisme de frappe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2207961C2 (de) * 1972-02-21 1982-05-27 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung an einem tragbaren, motorisch angetrieben Gesteinsaufbruchhammer zur axial beweglichen Führung eines Werkzeugs
CH560587A5 (en) * 1974-01-29 1975-04-15 Bosch Gmbh Robert Mounting for portable motor driven hammer - has housing and adjustable tool with spring between hammer and tool
DE4132023A1 (de) * 1991-09-26 1993-04-01 Bosch Gmbh Robert Einrichtung an handwerkzeugmaschinen
AU2002326946A1 (en) * 2001-09-17 2003-04-01 Milwaukee Electric Tool Corporation Rotary hammer
JP4525904B2 (ja) * 2004-06-08 2010-08-18 日立工機株式会社 打撃工具

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009047052A1 *

Also Published As

Publication number Publication date
CN101821061A (zh) 2010-09-01
RU2010118016A (ru) 2011-11-27
DE102007048262A1 (de) 2009-04-09
US20100294525A1 (en) 2010-11-25
WO2009047052A1 (fr) 2009-04-16

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