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EP1578563B1 - Marteau perforateur - Google Patents

Marteau perforateur Download PDF

Info

Publication number
EP1578563B1
EP1578563B1 EP03814446A EP03814446A EP1578563B1 EP 1578563 B1 EP1578563 B1 EP 1578563B1 EP 03814446 A EP03814446 A EP 03814446A EP 03814446 A EP03814446 A EP 03814446A EP 1578563 B1 EP1578563 B1 EP 1578563B1
Authority
EP
European Patent Office
Prior art keywords
hammer
tool holder
piston
tube
idling
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.)
Expired - Lifetime
Application number
EP03814446A
Other languages
German (de)
English (en)
Other versions
EP1578563A1 (fr
Inventor
Axel Kuhnle
Willy Braun
Heinz Schnerring
Gerhard Meixner
Karl Frauhammer
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 EP1578563A1 publication Critical patent/EP1578563A1/fr
Application granted granted Critical
Publication of EP1578563B1 publication Critical patent/EP1578563B1/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
    • 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 according to the preamble of claim 1.
  • the hammer tube for guiding the cylinder or pot piston is arranged axially displaceable in the housing.
  • the idle spring is supported between the hammer tube and a housing-fixed stop or spring plate.
  • the idle control opening is arranged in the guide sleeve.
  • the idling control opening is completed 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. If the clamped in the percussion hammer or in the hammer drill tool lifted from the processing site, the idle spring presses the hammer tube forward towards the tool holder, causing the Idle control bore is pushed out of the area of the guide piece and thus is open. A negative pressure in the air cushion area between the piston and the racket, which pulls back the racket, can not build up. The racket remains in a position where its trailing edge is some distance away from the idle control bore.
  • the air cushion impact mechanism is arranged in a non-rotatably on the housing and axially immovable hammer tube.
  • the tool holder is held displaceably relative to the hammer tube in the housing and is supported via an idle spring on a stop fixed to the housing or hammer tube.
  • an idle control port is provided for aerating the air cushion area during idling.
  • a known hammer drill ( US-A 43 66 869 ) is rotatably mounted and drivable by a rotary hammer tube in the housing both rotatable and axially displaceable.
  • the tool holder is rigidly connected to the hammer tube and thus participates in its rotational and translational movement.
  • the means for idle control of the arranged in the hammer tube air cushion percussion again includes an idle spring and an idle control opening.
  • the idle spring is disposed between the axially displaceable hammer tube and the housing.
  • a well-known hammer ( EP-A 10 48 415 ) is equipped with a catch ring for the racket of a striking mechanism.
  • the hammer drill according to the invention with the features of claim 1 has the advantage that the idle travel of the striking mechanism by an axial displacement of the Tool holder is ensured relative to the hammer tube, thus the hammer tube in the housing can be fixed, which allows for easier production.
  • the idle travel can be made very long, so that when idle the racket can move far away from the piston. This creates a large distance between the trailing edge of the racket and the idle control opening, so that an unwanted closing of the idle control opening reliably prevented and thus a safe idle is guaranteed.
  • the tool holder may be guided in the hammer tube or in the housing. In the latter case, the hammer tube can be significantly shortened.
  • the drawing shows a detail of a longitudinal section of a hammer drill, partially schematized, which occupies its stroke position in the upper half section and its idle position in the lower half section.
  • rotary hammer has a housing 10, a protruding from the housing 10 tool holder 11 for limited axially displaceable recording of a tool, not shown here, an air cushion impact mechanism 12 and an electric motor 13.
  • a hammer tube 14 is rotatably mounted, which can be offset by a bevel gear 15 of the electric motor 13 in rotation.
  • the bevel gear 15 includes in the exemplary embodiment a rotatably with the hammer tube 14, preferably integrally connected, ring gear 16, meshing with the ring gear 16 bevel gear 17, and a non-rotatably connected to the bevel gear 17 gear 18 with external teeth, with a on an output shaft 19 of the Electric motor 13 trained pinion 20 meshes.
  • the Bubble impact mechanism 12 comprises a hammer tube 14 axially displaceably guided pot piston 21, an axially displaceable inside the pot piston 21 guided racket 22 and a racket 22 downstream, projecting into the tool holder 11 striker or striker 23, which 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 fixed axially displaceable on the hammer tube 14 and rotatably connected thereto.
  • a circumferential toothing 25 with axially directed teeth is arranged between the hammer tube 14 and the tool holder 11.
  • a simple tongue and groove connection would suffice, in which a partial web formed on the axial web engages positively 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 fixed by means of two snap rings 27 on the hammer tube 14 axially immovable and rotationally fixed, and on the other hand by the remote from the tool holder opening trailing edge of the peripheral teeth 25.
  • the stop ring 26 also has a guide surface for the firing pin 23rd
  • the idle control port 31 includes a through hole 32 piercing the pipe wall of the hammer pipe 14 and a plurality of radial bores 33 inserted one after another in the pot wall of the pot piston 21 and a flat annular groove 34 pierced in the pipe wall of the hammer pipe 14 and covering the radial bores 33 and is in communication with the through hole 32.
  • the axial width of the annular groove 34 is dimensioned so that at any time of the axial stroke movement of the pot piston 21 is a connection between the radial bores 33 and the through hole 32.
  • the Idle control opening 31 is used for idle control of the air cushion impact mechanism 12 when lifting the tool from the processing point, to which an idler spring 35 is still provided, which seeks to push the tool holder 11 in its forwardmost position in which the tool holder 11 abuts the trailing edge of the peripheral teeth 25 ,
  • the trained as a compression spring idle spring 35 is supported on the one hand on a formed in the tool holder 11, radial annular shoulder 29 and on the other hand on the stop ring 26.
  • the air cushion impact mechanism 12 is shown in the upper half of the drawing in the striking position, wherein the pot piston 21 is in the left or front dead center.
  • the idle control opening 31 is closed by the racket 22, so that 21 can build up a cushion of air between the bat and pot piston in the air cushion space. If the tool is lifted from the processing point, the air cushion impact mechanism 12 goes into its idle position, as shown in the drawing in the lower half section.
  • the cocked idle spring 35 moves the tool holder 11 forward, in the drawing to the left until it stops at the trailing edge of the peripheral teeth 25, so that now the racket 22 can perform a larger Axialhub, while the idle control opening 31 releases.
  • axially displaceable tool holder 11 is not held in the hammer tube 14, but in the housing 10 and rotatably connected in the same manner with the hammer tube 14.
  • the hammer tube 14 can be made much shorter.
  • the idle control is performed in the same manner as described, wherein the stop ring 26 is then set for the idle spring 35 outside 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).

Claims (9)

  1. Marteau perforateur avec un boîtier (10), avec un porte-outil (11) sortant du boîtier (10), pour recevoir un outil avec déplacement axial limité, avec un mécanisme de percussion à coussin d'air (12) qui présente un piston (21) pouvant être entraîné par un moteur suivant un mouvement de va-et-vient, un percuteur (22) pouvant être entraîné par le piston (21) par le biais d'un coussin d'air et un marteau tubulaire (14) guidant le piston (21), monté à rotation dans le boîtier (10) et pouvant être entraîné en rotation, qui est connecté de manière solidaire en rotation au porte-outil (11), et avec des moyens de commande de marche à vide du mécanisme de percussion à coussin d'air (12) lors de l'enlèvement de l'outil depuis un poste d'usinage qui présentent une ouverture de commande de marche à vide (31) pour la ventilation de la région du coussin d'air, ainsi qu'un ressort de marche à vide (35), caractérisé en ce que le marteau tubulaire (14) est fixé de manière immobile axialement dans le boîtier (10) et le porte-outil (11) est disposé de manière mobile axialement par rapport au marteau tubulaire (14), en ce que le ressort de marche à vide (35) s'appuie d'une part sur le porte-outil (11) et d'autre part sur une bague de butée (26) fixée de manière immobile axialement sur le marteau tubulaire (14), et en ce qu'une bague de capture (37) élastique est insérée dans la bague de butée (26), et entoure par engagement par force le percuteur (22) dans sa position de marche à vide.
  2. Marteau selon la revendication 1, caractérisé en ce que le porte-outil (11) est guidé dans le marteau tubulaire (14).
  3. Marteau selon la revendication 1, caractérisé en ce que le porte-outil (11) est guidé dans le boîtier (10).
  4. Marteau selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la connexion solidaire en rotation entre le marteau tubulaire (14) et le porte-outil (11) est effectuée au moyen d'au moins une nervure axiale venant en prise dans une rainure axiale.
  5. Marteau selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la connexion solidaire en rotation entre le marteau tubulaire (14) et le porte-outil (11) est effectuée au moyen d'une denture axiale (25).
  6. Marteau selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le piston est réalisé sous forme de piston à pot (21) et le percuteur (22) est guidé de manière déplaçable axialement dans le piston à pot (21).
  7. Marteau selon la revendication 6, caractérisé en ce que l'ouverture de commande de marche à vide (31) comprend un alésage traversant (32) traversant la paroi tubulaire du marteau tubulaire (14), une pluralité d'alésages radiaux (33) pratiqués dans la paroi du pot du piston à pot (21) ainsi qu'une rainure annulaire (34) creusée dans la paroi tubulaire du marteau tubulaire (14), qui recouvre les alésages radiaux (33) dans chaque position de la course du piston à pot (21) et qui est en liaison avec l'alésage traversant (32).
  8. Marteau selon la revendication 6 ou 7, caractérisé en ce que du côté du percuteur (22) tourné vers le porte-outil (11) est disposé un boulon de percussion (23) qui est guidé de manière déplaçable axialement dans le porte-outil (11).
  9. Marteau selon la revendication 8, caractérisé en ce que le boulon de percussion est guidé en outre de manière axialement déplaçable dans la bague de butée (26).
EP03814446A 2002-12-23 2003-07-25 Marteau perforateur Expired - Lifetime EP1578563B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10260710 2002-12-23
DE2002160710 DE10260710A1 (de) 2002-12-23 2002-12-23 Bohr- oder Schlaghammer
PCT/DE2003/002518 WO2004060615A1 (fr) 2002-12-23 2003-07-25 Marteau perforateur ou a percussion

Publications (2)

Publication Number Publication Date
EP1578563A1 EP1578563A1 (fr) 2005-09-28
EP1578563B1 true EP1578563B1 (fr) 2009-07-01

Family

ID=32404207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03814446A Expired - Lifetime EP1578563B1 (fr) 2002-12-23 2003-07-25 Marteau perforateur

Country Status (4)

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

Families Citing this family (8)

* 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
DE102009026542A1 (de) 2009-05-28 2010-12-09 Hilti Aktiengesellschaft Werkzeugmaschine
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
DE102012206445A1 (de) * 2012-04-19 2013-10-24 Hilti Aktiengesellschaft Werkzeugmaschine
DE102013216516B4 (de) * 2013-08-21 2024-09-19 Robert Bosch Gmbh Handwerkzeugmaschinenwerkzeugaufnahme

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938513A1 (de) * 1979-09-24 1981-04-09 Hilti AG, 9494 Schaan Bohrhammer
SE8900947D0 (sv) * 1989-03-16 1989-03-16 Atlas Copco Ab Slagverktyg
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
GB9909987D0 (en) * 1999-04-30 1999-06-30 Black & Decker Inc Rotary hammer

Also Published As

Publication number Publication date
CN100352611C (zh) 2007-12-05
DE10260710A1 (de) 2004-07-01
WO2004060615A1 (fr) 2004-07-22
DE50311673D1 (de) 2009-08-13
CN1717299A (zh) 2006-01-04
EP1578563A1 (fr) 2005-09-28

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