EP1965951A1 - Machine-outil tenue à la main, en particulier marteau perforateur et/ou burineur - Google Patents

Machine-outil tenue à la main, en particulier marteau perforateur et/ou burineur

Info

Publication number
EP1965951A1
EP1965951A1 EP06807625A EP06807625A EP1965951A1 EP 1965951 A1 EP1965951 A1 EP 1965951A1 EP 06807625 A EP06807625 A EP 06807625A EP 06807625 A EP06807625 A EP 06807625A EP 1965951 A1 EP1965951 A1 EP 1965951A1
Authority
EP
European Patent Office
Prior art keywords
unit
drive unit
motor
hand tool
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
EP06807625A
Other languages
German (de)
English (en)
Other versions
EP1965951B1 (fr
Inventor
Gerhard Meixner
Ralph Dammertz
Juergen Lennartz
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 EP1965951A1 publication Critical patent/EP1965951A1/fr
Application granted granted Critical
Publication of EP1965951B1 publication Critical patent/EP1965951B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B25D16/003—Clutches specially adapted therefor
    • 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
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • 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
    • B25D2211/003—Crossed drill and motor spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation 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
    • B25D2250/065—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
    • B25D2250/331—Use of bearings
    • 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
    • B25D2250/365—Use of seals

Definitions

  • Hand tool in particular drill and / or chisel hammer
  • the invention relates to a hand tool according to the preamble of claim 1.
  • a hand tool machine formed by a chisel hammer which has a striking mechanism unit for achieving a pulse in the direction of a striking axis.
  • the percussion unit comprises an axial drive unit formed by an eccentric unit with a driven means formed by an eccentric pin.
  • the power tool comprises a motor unit formed by an electric motor whose motor shaft to the striking mechanism axis forms an angle of 90 ° and which is connected via a formed by a gear torque transmission of the axial drive unit with the same in operative connection.
  • the axial drive unit is mounted on the side facing away from the motor unit of the gear. On one of the engine unit side facing connects to the gear a crankshaft the axial drive unit or the eccentric unit, on whose front side facing the motor unit the output means or the eccentric pin is arranged.
  • the invention relates to a hand tool, in particular a drill and / or chisel, with a Schlagwerkinheit to obtain a pulse in the direction of a striking axis, which has an axial drive unit with a driven means, and with a motor unit and with a motor shaft, the impact axis includes an angle other than zero and which is operatively connected to the same via a torque transmitting wheel of the axial drive unit, wherein the axial drive unit is mounted on the side facing away from the motor unit of the Drehmomentübertragungsrads.
  • axial drive unit is to be understood in particular as a unit which converts a rotational movement into an axial movement, such as a cam gear and / or particularly advantageously an eccentric unit, which can be realized in a structurally simple, space-saving and robust manner.
  • a "power take-off means” should be understood to mean, in particular, a means which, in particular by virtue of its shape and / or in particular by its arrangement, effects at least part of a transformation of the rotational movement into the axial movement, such as, in particular, an eccentric pin or a cam with a corresponding eccentric shape, etc., and which interfaces with a transmission unit provided to transmit a driving force from the axial drive unit to a piston unit, such as a connecting rod unit and / or a pushing unit guided on a cam track of the axial drive unit is.
  • a “Drehmomentubertragungsrad” is to be understood in particular a wheel which is provided for torque transmission, such as a wheel which is provided for coupling with a belt and / or particularly preferably a gear, etc. Further, under an arrangement “directly on Drehmomentubertragungsrad” In particular, an arrangement without interposed shaft, in particular crankshaft understood, and / or an arrangement to a torque transmission means of Drehmomentubertragungsrads, in particular to a toothing, with a distance in the axial direction of the Drehmomentubertragungsrads smaller than its extent in the axial direction.
  • the output means may be formed in one or more parts and may in particular include connecting means, such as sleeves, which may be provided for attachment to the Drehmomentubertragungsrad and / or for damping etc.
  • the output means is particularly preferably formed in one piece and molded directly onto the torque transmission wheel or fastened directly to it.
  • the hand tool has a rotary drive unit, which is provided for the rotary drive of a tool and which is at least partially einstuckig with the Axialantriebsaku, preferably by the Drehmomentubertragungsrad the Axialantriebsein- unit Drive means of the rotary drive unit is provided and in particular, when the Drehmomentubertragungsrad the axial drive unit is mounted on a shaft of the rotary drive unit.
  • the percussion mechanism unit has a transmission unit which is provided for transmitting a drive force from the axial drive unit to a piston unit, the transmission unit having staggered attachment points.
  • "high offset” is to be understood in particular a distance in one direction, which is unequal to an axial direction or a direction of impact and in the direction of a bearing axis of the power tool, as particularly preferably in the direction of a motor axis or a rotational axis of the motor shaft.
  • the distance between the articulation points or between centers of the articulation points is preferably greater than half the longitudinal extent of at least one articulation point and particularly preferably greater than a total longitudinal extension of a articulation point.
  • An "articulation point” is to be understood in particular as meaning a point via which the transmission unit can communicate with the axial coupled drive unit, and a point via which the transmission unit is coupled to the piston unit.
  • the transfer unit has at least one transfer means which, in at least one subarea, has an orientation which results in a height difference between the articulation points and extends obliquely to a striking axis.
  • a "motor unit” is to be understood in particular as a unit in which an energy form, such as a flow energy and preferably an electrical energy, is converted into a rotational energy, such as, in particular, a rotor and a stator of an electric motor, etc.
  • an energy form such as a flow energy and preferably an electrical energy
  • a rotational energy such as, in particular, a rotor and a stator of an electric motor, etc.
  • bearings are understood, are stored on the parts of the motor unit, in particular stator and / or Laufer an electric motor, such as a motor shaft, etc.
  • the hand tool machine has a sealing unit which is arranged in the direction of the motor shaft between the engine bearings.
  • a sealing unit is to be understood as meaning, in particular, a unit which seals an engine compartment against lubricant.
  • a correspondingly arranged sealing unit can be made structurally particularly simple, in particular if it comprises an intermediate cover.
  • Fig. 1 is a schematic longitudinal section through a hand tool formed by a chisel hammer and
  • Fig. 2 is a schematic longitudinal section through a hand tool formed by a hammer drill. Description of the exemplary embodiments
  • FIG. 1 shows a schematic longitudinal section through a hand tool machine formed by a chisel hammer with a impact mechanism unit 10a, which serves to achieve a momentum in the direction of a striking axis 12a.
  • the hammer mechanism unit 10a has an axial drive unit 14a formed by an eccentric unit with a driven means 16a formed by an eccentric pin. Furthermore, the hammer mechanism unit 10a has a transmission unit 30a, which is provided for transmitting a drive force from the output means 16a of the axial drive unit 14a to a piston unit 32a or to a piston 54a guided in a hammer tube 52a.
  • the transmission unit 30a is essentially formed by a connecting means 38a designed as a connecting rod and has connecting points 34a, 36a formed by connecting rods or have the articulation points 34a, 36a or their centers 56a, 58a formed by the connecting rods in the direction of a motor axis 60a or an axis of rotation of a motor shaft 20a of a motor unit 18a formed by an electric motor, a distance 62a which preferably corresponds to at least half the extent of an articulation point 34a, 36a in the direction of the motor axis 60a.
  • the transfer means 38a has, in order to achieve a height difference substantially starting from the articulation point 34a facing the axial drive unit 14a up to the articulation point 36a facing the piston unit 32a, an orientation running obliquely to the striking axis 12a.
  • the transmission means 38a it would also be conceivable for the transmission means 38a to be perpendicular to the motor axis 60a and / or in the illustrated embodiment. Seen th side view coaxially and / or axially parallel to the striking axis 12a is formed.
  • the hand tool has a so-called L-construction, in which the motor shaft 60a or the motor shaft 20a includes an angle 22a of 90 ° to the striking axis 12a.
  • L-construction in which the motor shaft 60a or the motor shaft 20a includes an angle 22a of 90 ° to the striking axis 12a.
  • other angles which deviate from zero are also conceivable for the person skilled in the art, in particular angles between 30 ° and 150 °, wherein a coaxial or axis-parallel alignment of the motor shaft 20a with the striking axis 12a should be regarded as an angle of zero ,
  • the transmission means 38a is coupled to the piston unit 32a facing articulation point 36a via a ball head bearing 64a with the piston 54a and in the axial drive unit 14a facing pivot point 34a via a radial ball bearing 66a with the driven means 16a formed by an eccentric cam means of the axial drive unit 14a.
  • the motor unit 18a is arranged in a motor housing 68a, which connects in the direction of the axial drive unit 14a to a gear housing 70a formed by a first component and in the direction of the piston unit 32a to a hammer tube housing 72a formed by a further component.
  • a gear housing 70a formed by a first component
  • a hammer tube housing 72a formed by a further component.
  • Getriebegehause 70a and Hammerrohrgehause 72a could also be designed as one-piece.
  • a shell construction is possible in which functional groups are completely or partially enclosed by two half-shells. In this case, the motor unit 18a could also be accommodated in a half shell.
  • the motor shaft 20c protrudes in both directions beyond a laminated core of the motor unit 18a and is at an end remote from the axial drive unit 14a in the motor housing 68a via a first motor bearing point 42a and at one of the Axialan- drive unit 14a facing end in the transmission housing 70a via a second engine bearing point 44a, starting from the motor unit 18a formed by the electric motor in the axial direction of the motor shaft 60a behind a motor shaft 20a integrally formed on the motor pinion 46a and behind a meshed with the motor pinion 46a formed by a spur gear torque transmission gear 24a of the axial drive unit 14a.
  • the engine bearing point 44a could be arranged in front of the motor pinion 46a, starting from the motor unit 18a, along the motor shaft 20a.
  • the motor unit 18a is supported in the direction of the motor shaft 20a before and after its center of gravity 40a via the motor bearings 42a, 44a.
  • the portable power tool has a sealing unit 48a arranged in the direction of the motor shaft 20a between the motor bearing points 42a, 44a in the motor housing 68a, which comprises an intermediate cover 50a with a recess 74a through which the motor shaft 20a passes.
  • a ring seal 76a sealing between the motor shaft 20a and the intermediate cover 50a is disposed, by means of which an engine compartment in the motor housing 68a is sealed against a gear room in the transmission housing 70a.
  • a sealing ring could also be mounted directly in a suitably designed motor housing and / or directly in a transmission housing.
  • the axial drive unit 14a or the eccentric is mounted on one side of the torque transmission wheel 24a facing away from the motor unit 18a on one side in the transmission housing 70a, whereas on the side of the torque transmission wheel 24a facing the motor unit 18a, the driven means formed integrally by the eccentric pin 16a of the axial drive unit 14a is arranged directly on the torque transmission wheel 24a and is directly attached thereto.
  • FIG. 2 shows a further exemplary embodiment.
  • Essentially identical components and functions are generally numbered with the same reference numerals, with the letters a and b being added to distinguish the exemplary embodiments.
  • the following description is limited essentially only to the differences from the exemplary embodiment in FIG. 1, while with regard to the same components, features and functions, reference may be made to the description of the exemplary embodiment in FIG.
  • FIG. 2 shows a schematic longitudinal section through a hand tool machine formed by a rotary hammer, which additionally has a rotary drive unit 26b opposite the hand tool of FIG. 1, which is provided for the rotary drive of a tool, namely a drilling tool.
  • the rotary drive unit 26b is partially embodied in one piece with an axial drive unit 14b, specifically a torque transmission wheel 24b of the axial drive unit 14b is provided as drive means of the rotary drive unit 26b.
  • the torque conversion created by a spur gear is tragungsrad 24b is mounted on a shaft 28b of the rotary drive unit 26b, at the end remote from the Drehmomentubertragungsrad 24b an intermediate wheel 78b is attached. During operation, a torque is transmitted from the torque transmission wheel 24b to the intermediate gear 78b via the shaft 28b.
  • the intermediate gear 78b meshes with another gear 82b mounted on a shaft 80b.
  • the shaft 80b is mounted on a side facing away from a hammer tube 52b in a cover 84b and on a side facing the hammer tube 52b in a hammer tube housing 72b.
  • a bevel pinion 86b which meshes with a ring gear 88b formed on the hammer tube 52b, is integrally formed on the shaft 80b.
  • the ring gear 88b could also be formed by a component separate from the hammer tube 52b, which could be attached to the hammer tube 52b or connected to the hammer tube 52b via a circuit.

Landscapes

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

Abstract

L'invention concerne une machine-outil tenue à la main, en particulier un marteau perforateur et/ou burineur, présentant une unité de percussion (10a ; 10b) destinée à produire une impulsion dans le sens d'un axe de percussion (12a ; 12b), laquelle unité comporte une unité d'entraînement axial (14a ; 14b) pourvue d'un moyen de sortie (16a ; 16b), et une unité moteur (18a ; 18b) ainsi qu'un arbre moteur (20a ; 20b) qui forme un angle (22a ; 22b) différent de zéro avec l'axe de percussion (12a ; 12b) et est en liaison fonctionnelle avec l'unité d'entraînement axial (14a ; 14b) par l'intermédiaire d'une roue de transmission de couple (24a ; 24b) de ladite unité, cette unité d'entraînement axial (14a ; 14b) étant montée sur le côté de la roue de transmission de couple (24a ; 24b) opposé à l'unité moteur (18a ; 18b). Selon la présente invention, le moyen de sortie (16a ; 16b) de l'unité d'entraînement axial (14a ; 14b) est placé directement sur la roue de transmission de couple (24a ; 24b).
EP06807625.6A 2005-12-22 2006-10-27 Machine-outil portable, en particulier marteau perforateur et/ou burineur Expired - Fee Related EP1965951B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005061399A DE102005061399A1 (de) 2005-12-22 2005-12-22 Handwerkzeugmaschine, insbesondere Bohr- und/oder Meißelhammer
PCT/EP2006/067884 WO2007073956A1 (fr) 2005-12-22 2006-10-27 Machine-outil tenue à la main, en particulier marteau perforateur et/ou burineur

Publications (2)

Publication Number Publication Date
EP1965951A1 true EP1965951A1 (fr) 2008-09-10
EP1965951B1 EP1965951B1 (fr) 2015-06-17

Family

ID=37622230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06807625.6A Expired - Fee Related EP1965951B1 (fr) 2005-12-22 2006-10-27 Machine-outil portable, en particulier marteau perforateur et/ou burineur

Country Status (5)

Country Link
US (1) US8613328B2 (fr)
EP (1) EP1965951B1 (fr)
CN (1) CN101341006B (fr)
DE (1) DE102005061399A1 (fr)
WO (1) WO2007073956A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007000393A1 (de) * 2007-07-19 2009-01-22 Hilti Aktiengesellschaft Handwerkzeugmaschine mit pneumatischem Schlagwerk
JP5395620B2 (ja) * 2009-11-02 2014-01-22 株式会社マキタ 打撃工具
CN105722647A (zh) * 2013-11-26 2016-06-29 日立工机株式会社 电动工具
GB201421577D0 (en) * 2014-12-04 2015-01-21 Black & Decker Inc Drill
GB201421576D0 (en) 2014-12-04 2015-01-21 Black & Decker Inc Drill
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
WO2019147919A1 (fr) 2018-01-26 2019-08-01 Milwaukee Electric Tool Corporation Outil à percussion
EP3901498A1 (fr) * 2020-04-21 2021-10-27 Hilti Aktiengesellschaft Mécanisme de percussion électropneumatique

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US458500A (en) 1891-08-25 Hermann w
USRE20365E (en) * 1937-05-18 Portable power hammer
US1298966A (en) * 1915-06-16 1919-04-01 Electro Magnetic Tool Company Electrically-operated tool.
US1911814A (en) * 1931-04-29 1933-05-30 Black & Decker Mfg Co Portable power driven percussive tool
US2067886A (en) * 1935-09-13 1937-01-19 Byford Electric Hammer Co Inc Free piston power hammer
US2873735A (en) * 1956-07-13 1959-02-17 Peugeot & Cie Soc Electric hammer
US3114423A (en) * 1960-03-30 1963-12-17 Skil Corp Rotary-hammer device
DE1298954B (de) 1963-04-26 1969-07-03 Impex Essen Vertrieb Schlaggeraet
US3305031A (en) * 1965-02-01 1967-02-21 Ingersoll Rand Co Power hammer
US3921729A (en) * 1971-11-25 1975-11-25 Hilti Ag Electropneumatic hammer
DE2250271A1 (de) * 1972-10-13 1974-04-25 Wacker Werke Kg Elektrohammer
US3997805A (en) * 1974-04-08 1976-12-14 General Electric Company Resilient electric motor bearing seal
DE2917475A1 (de) 1979-04-30 1980-11-13 Hilti Ag Bohr- oder meisselhammer
DE3146494C2 (de) * 1981-11-24 1986-10-30 Black & Decker, Inc. (Eine Gesellschaft N.D.Ges.D. Staates Delaware), Newark, Del. Elektrowerkzeug, insbesondere Handwerkzeug, mit Drehmomentüberwachung
DE3314414A1 (de) 1983-04-21 1984-10-25 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
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DE3910599C2 (de) 1989-04-01 1994-11-17 Bosch Gmbh Robert Schmiervorrichtung für einen Bohr- und/oder Schlaghammer
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Also Published As

Publication number Publication date
US8613328B2 (en) 2013-12-24
WO2007073956A1 (fr) 2007-07-05
EP1965951B1 (fr) 2015-06-17
DE102005061399A1 (de) 2007-07-05
CN101341006A (zh) 2009-01-07
US20090266572A1 (en) 2009-10-29
CN101341006B (zh) 2014-01-01

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