WO2004060615A1 - Marteau perforateur ou a percussion - Google Patents

Marteau perforateur ou a percussion Download PDF

Info

Publication number
WO2004060615A1
WO2004060615A1 PCT/DE2003/002518 DE0302518W WO2004060615A1 WO 2004060615 A1 WO2004060615 A1 WO 2004060615A1 DE 0302518 W DE0302518 W DE 0302518W WO 2004060615 A1 WO2004060615 A1 WO 2004060615A1
Authority
WO
WIPO (PCT)
Prior art keywords
hammer
tool holder
piston
tube
idle
Prior art date
Application number
PCT/DE2003/002518
Other languages
German (de)
English (en)
Inventor
Axel Kuhnle
Willy Braun
Heinz Schnerring
Gerhard Meixner
Karl Frauhammer
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
Priority to EP03814446A priority Critical patent/EP1578563B1/fr
Priority to DE50311673T priority patent/DE50311673D1/de
Publication of WO2004060615A1 publication Critical patent/WO2004060615A1/fr

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
    • B25D17/06—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
    • B25D11/005—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
    • B25D16/00—Portable 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
    • 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
    • B25D2250/191—Ram catchers for stopping the ram when entering idling mode
    • 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 hammer drill or percussion hammer according to the preamble of claim 1.
  • the hammer tube for guiding the cylinder or cup piston is arranged axially displaceably in the housing.
  • the idle spring is supported between the hammer tube and a stop or spring plate fixed to the housing.
  • the idle control opening is arranged in the guide sleeve.
  • the idle control opening is closed off by a guide piece formed on the housing and additionally by the racket, so that an air pressure cushion can build up in the air cushion space between the piston and the racket.
  • the idle spring presses the hammer tube forward in the direction of the tool holder, whereby the idle control bore is pushed out of the area of the guide piece and is thus open.
  • a vacuum in the air cushion area between the piston and the club, which pulls the club back, can no longer build up.
  • the racket remains in a position with its rear edge a certain distance from the idle control hole.
  • the hammer drill or percussion hammer according to the invention with the features of claim 1 has the advantage that the idle travel of the percussion mechanism is ensured by an axial displacement of the tool holder relative to the hammer tube, so that the hammer tube can be arranged in a fixed manner in the housing, which enables easier manufacture.
  • the idle travel can be made very long, so that the racket can move far from the piston when idling. This creates a large distance between the rear edge of the racket and the idle control opening, so that an unwanted closing of the idle control opening is reliably prevented, and thus safe idling is ensured.
  • the tool holder is guided in the hammer tube and the stop ring forming a spring plate for supporting the idle spring is fixed in the hammer tube.
  • the stop ring can also be used to mechanically fix the racket in the idle position
  • an elastic catch ring is arranged in the stop ring, in which the racket is immersed in its idle position and held in a spring-elastic manner. This further secures the idling of the hammer drill or hammer.
  • the tool holder can also be guided in the housing, as a result of which the hammer tube can be shortened considerably.
  • the drawing shows a section of a longitudinal section of a rotary hammer, partially schematized, which takes its striking position in the upper half section and its idle position in the lower half section.
  • An example of an electric hand-held power tool with a striking mechanism has a housing 10, a tool holder 11 protruding from the housing 10 for the limited axially displaceable reception of a tool (not shown here), an air cushion striking mechanism 12 and an electric motor 13.
  • a hammer tube 14 is rotatably supported by a
  • Bevel gear 15 can be set in rotation by the electric motor 13.
  • the bevel gear 15 comprises a ring gear 16 which is connected to the hammer tube 14 in a rotationally fixed manner, preferably in one piece, a bevel gear 17 which meshes with the ring gear 16, and a gear 18 with external toothing which is connected in a rotationally fixed manner to the bevel gear 17 and which meshes with one on one
  • the Air cushion percussion mechanism 12 comprises a pot piston 21 which is axially displaceably guided in the hammer tube 14, a striker 22 which is axially displaceably guided in the interior of the pot piston 21 and a striker or firing pin 23 which is arranged downstream of the striker 22 and projects into the tool holder 1 and which is guided axially displaceably in the tool holder 11 is.
  • the pot piston 21 is driven by a crank mechanism 24 in a reciprocating stroke movement.
  • the tool holder 11 is axially displaceably fixed to the hammer tube 14 and connected to it in a rotationally fixed manner.
  • circumferential teeth 25 with axially directed teeth are arranged between the hammer tube 14 and the tool holder 11.
  • a simple tongue and groove connection would suffice, in which an axial web formed on one part engages in a form-fitting manner in an axial groove formed in the other part.
  • the axial displacement movement of the tool holder 11 is limited on the one hand by a stop ring 26 which is axially immovably and non-rotatably fastened to the hammer tube 14 by means of two snap rings 27, and on the other hand by the rear edge of the peripheral toothing 25 facing away from the tool holder opening.
  • the stop ring 26 also has a guide surface for the firing pin 23.
  • the idle control opening 31 comprises a through hole 32 penetrating the tube wall of the hammer tube 14 and a plurality of holes in the pot wall of the pot piston 21 in FIG
  • Radial bores 33 lying one behind the other in the circumferential direction, as well as a flat annular groove 34 which is pierced into the tube wall of the hammer tube 14 and which covers the radial bores 33 and. communicates with the through hole 32.
  • the axial width of the annular groove 34 is dimensioned such that there is a connection between the radial bores 33 and the through bore 32 at any time during the axial stroke movement of the pot piston 21.
  • the Idle control opening 31 serves for idle control of the air cushion striking mechanism 12 when the tool is lifted from the machining point, for which purpose an idle spring 35 is also provided, which tries to push the tool holder 11 into its foremost position, in which the tool holder 11 strikes the trailing edge of the circumferential toothing 25 ,
  • the idle spring 35 designed as a compression spring is supported on the one hand on a radial annular shoulder 29 formed in the tool holder 11 and on the other hand on the stop ring 26.
  • the air cushion striking mechanism 12 is shown in the striking position in the upper half of the drawing, with the pot piston 21 being in the left or front dead center position.
  • the idle control opening 31 is closed by the striker 22, so that an air cushion can build up in the air cushion space between the striker and the pot piston 21. If the tool is lifted from the processing point, the air cushion striking mechanism 12 goes into its idle position, as shown in the drawing in the lower half-section.
  • the tensioned idle spring 35 moves the tool holder 11 forward, in the drawing to the left, until it stops at the rear edge of the circumferential toothing 25, so that the striker 22 can now carry out a larger axial stroke, thereby releasing the idle control opening 31.
  • Firing pin 23 of the club 22 is pushed out of the catch ring 37 again.
  • the axially displaceable tool holder 11 is not held in the hammer tube 14 but in the housing 10 and is connected in the same way to the hammer tube 14 in a rotationally fixed manner.
  • the hammer tube 14 can be made much shorter.
  • the idle control is carried out in the same way as described, the stop ring 26 for the idle spring 35 then being fixed on the outside of the hammer tube 14.

Landscapes

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

Abstract

Marteau perforateur ou à percussion qui possède un boîtier (10), un porte-outil (11) et un ensemble de percussion (12) à coussin pneumatique. L'ensemble de percussion (12) à coussin pneumatique comporte un piston (21) pouvant être entraîné par un moteur et destiné à effectuer un mouvement de va-et-vient, un percuteur (22) entraîné par le piston (21) et un mandrin (14) guidant le piston (21). Pour faire passer l'ensemble à percussion (12) à coussin pneumatique en marche à vide lorsque l'outil est éloigné du site de travail, ledit marteau comporte une ouverture (31) de marche à vide et un ressort (35) de marche à vide. Selon la présente invention, pour obtenir une marche à vide sûre sur une course à vide longue de l'ensemble à percussion (12) et pour obtenir un marteau de fabrication peu onéreuse et de construction simple, le mandrin (14) est fixé axialement non coulissant dans le boîtier (10) et le porte-outil (11) est conçu axialement coulissant. Le ressort (35) de marche à vide s'appuie sur le porte-outil (11) et sur un anneau de butée (26) fixé axialement non coulissant (26).
PCT/DE2003/002518 2002-12-23 2003-07-25 Marteau perforateur ou a percussion WO2004060615A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03814446A EP1578563B1 (fr) 2002-12-23 2003-07-25 Marteau perforateur
DE50311673T DE50311673D1 (de) 2002-12-23 2003-07-25 Bohrhammer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002160710 DE10260710A1 (de) 2002-12-23 2002-12-23 Bohr- oder Schlaghammer
DE10260710.9 2002-12-23

Publications (1)

Publication Number Publication Date
WO2004060615A1 true WO2004060615A1 (fr) 2004-07-22

Family

ID=32404207

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/002518 WO2004060615A1 (fr) 2002-12-23 2003-07-25 Marteau perforateur ou a percussion

Country Status (4)

Country Link
EP (1) EP1578563B1 (fr)
CN (1) CN100352611C (fr)
DE (2) DE10260710A1 (fr)
WO (1) WO2004060615A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130277077A1 (en) * 2012-04-19 2013-10-24 Hilti Aktiengesellschaft Machine tool
US8739895B2 (en) 2009-05-28 2014-06-03 Hilti Aktiengesellschaft Machine tool

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0428215D0 (en) * 2004-12-23 2005-01-26 Black & Decker Inc Piston Drive Mechanism
DE102008054978A1 (de) * 2008-12-19 2010-06-24 Robert Bosch Gmbh Elektrohandwerkzeug, insbesondere Bohr- und/oder Schlaghammer
DE102009046479A1 (de) * 2009-11-06 2011-05-19 Hilti Aktiengesellschaft Handwerkzeugmaschine
DE102010001683A1 (de) * 2010-02-09 2011-08-11 Robert Bosch GmbH, 70469 Handwerkzeugmaschinenvorrichtung
DE102010029915A1 (de) * 2010-06-10 2011-12-15 Hilti Aktiengesellschaft Werkzeugmaschine und Steuerungsverfahren
DE102013216516B4 (de) * 2013-08-21 2024-09-19 Robert Bosch Gmbh Handwerkzeugmaschinenwerkzeugaufnahme

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366869A (en) * 1979-09-24 1983-01-04 Hilti Aktiengesellschaft Hammer drill
EP0388383A1 (fr) * 1989-03-16 1990-09-19 Atlas Copco Berema Aktiebolag Machine à percussion
EP1048415A2 (fr) * 1999-04-30 2000-11-02 Black & Decker Inc. Marteau rotatif

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501277C2 (sv) * 1989-10-28 1995-01-09 Berema Atlas Copco Ab Slagverk
JP3292969B2 (ja) * 1995-08-18 2002-06-17 株式会社マキタ ハンマードリル

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366869A (en) * 1979-09-24 1983-01-04 Hilti Aktiengesellschaft Hammer drill
EP0388383A1 (fr) * 1989-03-16 1990-09-19 Atlas Copco Berema Aktiebolag Machine à percussion
EP1048415A2 (fr) * 1999-04-30 2000-11-02 Black & Decker Inc. Marteau rotatif

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8739895B2 (en) 2009-05-28 2014-06-03 Hilti Aktiengesellschaft Machine tool
US20130277077A1 (en) * 2012-04-19 2013-10-24 Hilti Aktiengesellschaft Machine tool

Also Published As

Publication number Publication date
DE10260710A1 (de) 2004-07-01
DE50311673D1 (de) 2009-08-13
CN1717299A (zh) 2006-01-04
EP1578563B1 (fr) 2009-07-01
EP1578563A1 (fr) 2005-09-28
CN100352611C (zh) 2007-12-05

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