EP4058245A1 - Ensemble mécanisme de percussion - Google Patents

Ensemble mécanisme de percussion

Info

Publication number
EP4058245A1
EP4058245A1 EP20800186.7A EP20800186A EP4058245A1 EP 4058245 A1 EP4058245 A1 EP 4058245A1 EP 20800186 A EP20800186 A EP 20800186A EP 4058245 A1 EP4058245 A1 EP 4058245A1
Authority
EP
European Patent Office
Prior art keywords
impact
hammer
tool holder
meissei
shock absorber
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.)
Pending
Application number
EP20800186.7A
Other languages
German (de)
English (en)
Inventor
Ulrich Mandel
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 EP4058245A1 publication Critical patent/EP4058245A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • 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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • 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
    • 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
    • B25D2217/0015—Anvils
    • 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
    • B25D2250/231—Sleeve 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
    • B25D2250/231—Sleeve details
    • B25D2250/235—Sleeve couplings

Definitions

  • the present invention relates to a drilling and / or cutting hammer with a drive motor, an impact mechanism and a tool holder for receiving a tool.
  • the striking mechanism has a striker that is axially displaceable in a striker guide and that acts on the tool.
  • the hammer mechanism is equipped with an idle shock absorber element and a rebound shock absorber element.
  • Idle shock absorber elements and rebound shock absorber elements which are preferably designed as elastomer damping elements, are used to keep force peaks on downstream components and vibrations as low as possible.
  • the striker hits a typically provided impact disc after each impact and is intercepted by the impact shock absorption element.
  • a blank impact damping element is typically used to protect the downstream components from a peak force of the blank impact.
  • a blank impact damping of the idle impact absorber element influences the return speed of the anvil after a blank impact and thus also the shutdown behavior of the hammer.
  • the idle impact absorber element and / or the rebound impact absorber element is integrated on the anvil.
  • this has the advantage that the anvil, including the idle impact damper element and / or the rebound impact damper element, can be installed in one work step - and thus comparatively inexpensively.
  • the idle shock absorber element and the rebound shock absorber element are designed in one piece with one another as a combination damper element.
  • the combi-steamer element is designed as an elastomer.
  • the combi-steamer element is vulcanized onto the striker.
  • the combi-steamer element can be connected to the anvil by means of a form-fitting connection.
  • the combi-steamer element is surrounded by a stop sleeve which is arranged to strike a blank impact stop surface on the one hand and to strike a rebound impact stop surface on the other hand.
  • the stop sleeve can be spaced apart from the anvil in the radial direction, the elastomer preferably being located in the radial direction between the anvil and the stop sleeve.
  • the blank impact stop surface is formed on the tool holder itself.
  • the rebound impact stop surface can advantageously be formed on a stop ring encompassed by the tool holder.
  • a stop ring on the impact impact side can be dispensed with and the impact impact stop surface can be formed directly on the tool holder.
  • the stop ring is supported with respect to the tool holder by an auxiliary rebound shock absorber element.
  • the striking mechanism has a guide housing which surrounds the anvil and / or the tool holder at least in sections.
  • the tool holder is movable in the axial direction relative to the guide housing and / or is arranged at least in sections within the guide housing.
  • the hammer mechanism has an additional idle impact damper element which preferably acts between the tool holder and the guide housing.
  • the hammer mechanism can have an additional rebound shock absorber element, which preferably acts between the tool holder and the guide housing.
  • An input of force from the tool holder into the unit consisting of the additional idle impact damper element and the additional impact shock absorber element can take place through a pin protruding in the radial direction from the tool holder.
  • the pin engages, in relation to the axial direction of the anvil, between the additional idle impact damper element and the additional impact shock absorber element.
  • FIG. 1 shows a preferred exemplary embodiment of a drilling and / or chiselling hammer according to the invention
  • FIG. 2 shows a preferred exemplary embodiment of a striking mechanism in two states.
  • FIG. 1 A preferred exemplary embodiment of a drilling and / or chiselling hammer 100 according to the invention is shown in FIG. 1.
  • the hammer drill and / or hammer drill 100 is equipped with a drive motor 70, an impact mechanism 10 and a tool holder 50 for receiving a tool 110.
  • the hammer mechanism 10 and the drive motor 70 are arranged within a housing 90 of the hammer drill and / or hammer drill 100.
  • the striking mechanism 10 has a striker 30 which can be displaced in an axial direction AR in a striker guide 20 and acts on the tool 110.
  • the anvil guide 20 is implemented, for example, by two roller bearings 21, 23 which are each supported against the tool holder 50 both in the radial direction RR and in the axial direction AR.
  • the striking mechanism 10 is equipped with an idle shock absorber element 11 and a rebound shock absorber element 13, which according to the invention are integrated on the striker 30.
  • the idle impact absorber element 11 and the rebound impact absorber element 13 are formed integrally with one another and thus form a combination damper element 15.
  • the combination damper element 15 is made as an elastomer and is vulcanized onto the striker 30 here, for example.
  • the combi-damper element 15 is surrounded by a stop sleeve 17 which is designed to strike a blank impact stop surface 12 on the one hand (see FIG. 2A) and to strike a rebound impact stop surface 14 on the other (see FIG. 2B).
  • the blank impact stop surface 12 is formed on the tool holder 50 itself.
  • the rebound impact stop surface 14 is formed on a stop ring 55 encompassed by the tool holder 50.
  • the striking mechanism 10 has a guide housing 80 which surrounds both the anvil 30 and the tool holder 50 at least in sections.
  • the tool holder 50 is movable in the axial direction AR relative to the guide housing 80 and is arranged at least in sections within the guide housing 80.
  • the hammer mechanism 10 has an additional idle impact damper element 31 which acts between the tool holder 50 and the guide housing 80.
  • the hammer mechanism is also equipped with an additional impact shock absorber element 33, which acts between the tool holder 50 and the guide housing 80.
  • additional idle impact absorber element 31 and additional impact shock absorber element 33 results in a shrinking mounting of the tool holder 50 with respect to the guide housing 80, whereby a not inconsiderable part of the impact energy of the anvil can be swung out.
  • a force is introduced from the tool holder 50 into the Unit of additional idle impact absorber element 31 and additional impact shock absorber element 33 by a pin 55 protruding in radial direction RR from the tool holder, which - in relation to axial direction AR - engages between additional idle impact absorber element 31 and additional impact impact absorber element 33.
  • FIG. 2A shows the moment of a blank impact, i.e. the striker shown in FIG. 2A moves to the left and the stop sleeve 17 surrounding the combi-steamer element 15 is already in contact with the blank impact stop surface 12.
  • the blank impact stop surface 12 is formed on the tool holder 50 and is located on the side of the stop sleeve facing the tool 110 (cf. FIG. 1).
  • FIG. 2A again shows the moment of a bounce, i.e. the striker shown in FIG. 2B moves to the right and the stop sleeve 17 surrounding the combi-steamer element 15 is already in contact with the bounce stop surface 14.
  • the rebound impact stop surface 14 is formed on a stop ring 55 encompassed by the tool holder 50.
  • the rebound impact stop surface 14 is located on the side of the stop sleeve 17 facing away from the tool 110 (cf. FIG. 1).
  • the stop ring 55 is supported with respect to the tool holder 50 by an auxiliary impact shock absorber element 57.
  • the auxiliary impact shock absorber element 57 can additionally dampen a shock impact (the striker in FIG. 2 moves to the right).
  • the auxiliary rebound shock absorber element 57 based on the axial direction AR, is between the stop ring 55 and that roller bearing 23 which is located on the side facing away from the tool 110 (see FIG. 1) Stop sleeve 17 is located.

Landscapes

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

Abstract

L'invention concerne un marteau perforateur et/ou burineur (100) pourvu d'un moteur d'entraînement (70), d'un mécanisme de percussion (10) et d'une zone de réception d'outil (50) destinée à recevoir un outil (110). Le mécanisme de percussion (10) comporte un percuteur (30) qui peut être déplacé axialement dans un guide de percuteur (20) et qui agit sur l'outil (110), le mécanisme de percussion (10) est équipé d'un élément d'amortissement d'impact de ralenti (11) et d'un élément d'amortissement d'impact de rebond (13), ledit élément d'amortissement d'impact de ralenti (11) et/ou l'élément d'amortissement d'impact de rebond (13) étant intégrés dans le percuteur (30).
EP20800186.7A 2019-11-15 2020-11-06 Ensemble mécanisme de percussion Pending EP4058245A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19209441.5A EP3822030A1 (fr) 2019-11-15 2019-11-15 Marteau perforateur et/ou burin avec agencement de mécanisme de percussion
PCT/EP2020/081266 WO2021094213A1 (fr) 2019-11-15 2020-11-06 Ensemble mécanisme de percussion

Publications (1)

Publication Number Publication Date
EP4058245A1 true EP4058245A1 (fr) 2022-09-21

Family

ID=68583194

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19209441.5A Withdrawn EP3822030A1 (fr) 2019-11-15 2019-11-15 Marteau perforateur et/ou burin avec agencement de mécanisme de percussion
EP20800186.7A Pending EP4058245A1 (fr) 2019-11-15 2020-11-06 Ensemble mécanisme de percussion

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19209441.5A Withdrawn EP3822030A1 (fr) 2019-11-15 2019-11-15 Marteau perforateur et/ou burin avec agencement de mécanisme de percussion

Country Status (4)

Country Link
US (1) US20220388137A1 (fr)
EP (2) EP3822030A1 (fr)
CN (1) CN114450128A (fr)
WO (1) WO2021094213A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3822036A1 (fr) * 2019-11-12 2021-05-19 Hilti Aktiengesellschaft Agencement de mécanisme de frappe
DE102021203064A1 (de) * 2021-03-26 2022-09-29 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine mit einer Verriegelungseinrichtung
DE102021203063A1 (de) * 2021-03-26 2022-09-29 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine mit einer Verriegelungseinrichtung

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2685274A (en) * 1951-04-12 1954-08-03 Phyllis E Liddicoat Pneumatic tool
DE3633675A1 (de) * 1986-10-03 1988-04-14 Hilti Ag Bohrhammer mit schlagwerk
DE4400779A1 (de) * 1994-01-13 1995-07-20 Duss Maschf Elektropneumatischer Schlag- oder Drehschlaghammer
ES2208623T3 (es) * 2001-03-07 2004-06-16 Black & Decker Inc. Martillo.
JP4515181B2 (ja) * 2004-07-20 2010-07-28 株式会社マキタ 電動ハンマドリル
US7383895B2 (en) * 2005-08-19 2008-06-10 Makita Corporation Impact power tool
DE102006046472A1 (de) * 2006-09-29 2008-04-03 Robert Bosch Gmbh Schlagvorrichtung
US7878265B2 (en) * 2007-02-06 2011-02-01 Makita Corporation Impact power tool
DE102007000131A1 (de) * 2007-03-07 2008-09-11 Hilti Ag Handwerkzeugmaschine mit pneumatischem Schlagwerk
US7806201B2 (en) * 2007-07-24 2010-10-05 Makita Corporation Power tool with dynamic vibration damping
JP5100272B2 (ja) * 2007-09-13 2012-12-19 株式会社マキタ 打撃工具
DE102008000727A1 (de) * 2008-03-18 2009-09-24 Robert Bosch Gmbh Tragbare Werkzeugmaschine, insbesondere Bohr- oder Schlaghammer, mit einer Schlägerfangeinrichtung und/oder Schlägerdämpfungseinrichtung
JP5147488B2 (ja) * 2008-03-27 2013-02-20 株式会社マキタ 作業工具
DE102009050014B4 (de) * 2009-10-21 2013-07-11 Metabowerke Gmbh Motorisch angetriebenes Werkzeuggerät mit Bohrhammerbetriebsart
JP5518617B2 (ja) * 2010-08-02 2014-06-11 株式会社マキタ 打撃工具
WO2015000129A1 (fr) * 2013-07-02 2015-01-08 Chen Zhenyu Dispositif d'impact et machine-outil pour opération d'impact

Also Published As

Publication number Publication date
WO2021094213A1 (fr) 2021-05-20
US20220388137A1 (en) 2022-12-08
CN114450128A (zh) 2022-05-06
EP3822030A1 (fr) 2021-05-19

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