EP2700477B1 - Agencement d'engrenage pour une machine-outil et machine-outil - Google Patents

Agencement d'engrenage pour une machine-outil et machine-outil Download PDF

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Publication number
EP2700477B1
EP2700477B1 EP13176696.6A EP13176696A EP2700477B1 EP 2700477 B1 EP2700477 B1 EP 2700477B1 EP 13176696 A EP13176696 A EP 13176696A EP 2700477 B1 EP2700477 B1 EP 2700477B1
Authority
EP
European Patent Office
Prior art keywords
drive
drive spindle
train assembly
tool
spindle
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.)
Active
Application number
EP13176696.6A
Other languages
German (de)
English (en)
Other versions
EP2700477A1 (fr
Inventor
Roland Saupp
Michael Kukla
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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.)
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Publication of EP2700477A1 publication Critical patent/EP2700477A1/fr
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Classifications

    • 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
    • B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
    • 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
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • 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
    • 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
    • B25D2216/0038—Tools having a rotation-only mode

Definitions

  • the invention relates to a gear arrangement according to the preamble of claim 1 for a power tool with a rotating tool.
  • a gear arrangement is from the US 4,158,313 A known.
  • one of a drive unit of the machine tool driven shaft (motor shaft) protrudes with its front end in the gear assembly and drives a intermediate shaft via a drive pinion.
  • the German Offenlegungsschrift discloses DE 196 51 828 A1
  • the intermediate shaft is arranged parallel to the Bohrwerkmaschinemaschinese, but at a distance next to this.
  • the hammer drill further comprises a Lucaspolster Farbwerk and a reciprocating in the direction of Bohrwerkmaschineachse reciprocating wobble drive device whose swash bearing or swash plate is mounted on the rotatably driven intermediate shaft.
  • the term wobble drive device is understood to mean a rotation / translation converter device in which the rotational movement of a drive-side element is converted into a linear translational movement of an output-side element.
  • a rotation element acts on a wobble element, which is referred to below as a wobble bearing, in such a way that it is driven in a reciprocating manner and thereby can put another element in linear translational motion.
  • a drive spindle of the machine tool on which the tool to be rotated can be accommodated, comprises a drill sleeve, which is in engagement with the external toothing of a spur gear of the intermediate shaft seated on the intermediate shaft with an external toothed ring.
  • the length of the gear assembly is thus significantly influenced by the length and the position of the impact mechanism. So it must be ensured that the swash bearing does not collide with the driven shaft and / or the spur gear of the intermediate shaft.
  • a hammer drill which has a drive motor with a motor shaft and a motor spindle connected to the motor shaft.
  • a Schlagtechnik which is also operatively connected to the motor shaft, is via a single-stage gearbox with the Tool spindle connected.
  • the single-stage gearbox includes a Schlagtechnik drive wheel that drives the tool spindle via a ring gear.
  • the motor shaft of the drive motor in turn comprises a motor pinion whose teeth are in operative engagement with an end toothing of the striking mechanism drive wheel.
  • a machine tool comprising a drive spindle for the rotary drive of a tool, a coaxial gear ring which can be coupled to the drive spindle and an intermediate shaft which is capable of transmitting a drive torque from a driven shaft to the drive spindle.
  • the intermediate shaft has for this purpose a gear which is in engagement with the coaxial sprocket of the drive spindle.
  • a gear arrangement is provided which additionally comprises a further countershaft with a gear.
  • a gear arrangement according to claim 1 for a driven Proposed machine tool comprising a rotating tool, which comprises a drive spindle for rotationally driving a tool, a coaxial ring gear which can be coupled to the drive spindle, and an intermediate shaft which can transmit drive torque from a driven shaft to the drive spindle, the intermediate shaft having a gear, which is in engagement with the coaxial sprocket of the drive spindle and wherein the gear assembly additionally comprises a countershaft with a gear.
  • the present invention is characterized in that the gear of the countershaft, depending on the operating mode of the machine tool in engagement with the coaxial ring gear of the drive spindle or out of engagement with the coaxial ring gear of the drive spindle can be brought, the drive spindle having a drill sleeve, which comprises a coupling portion, which can be brought into engagement with the coaxial sprocket of the drive spindle.
  • the countershaft is arranged parallel to the intermediate shaft and that a Heilpolstertschtechnik is provided with a Taumeltriebvorraum, wherein the Taumeltriebvortechnisch is connected to the countershaft and is able to convert a rotational movement of the countershaft in a translational motion and transfer to the striking mechanism.
  • the wobble drive device and the torque transmission via the spur gear of the intermediate shaft can be spatially separated from each other on the drive spindle, whereby the entire gear assembly builds shorter in the direction of Bohrwerkmaschineachse.
  • the driven shaft is driven by a drive unit, for example by an electric motor or a pneumatic drive unit, and transmits its drive torque in a conventional manner to the intermediate shaft of the gear assembly.
  • the drive spindle serves for the rotary drive of a tool which can be accommodated on the machine tool, wherein the intermediate shaft is able to transmit the drive torque to the drive spindle via a coaxial toothed ring which can be coupled to the drive spindle.
  • the countershaft with its gear in engagement with the coaxial ring gear of the drive spindle can be brought, the drive torque can be transmitted from the driven shaft via the intermediate shaft and the coaxial sprocket on the countershaft.
  • This torque transmission can be interrupted as needed.
  • a coupling section according to the invention may, for example, comprise a coaxial flange with an inner toothing or an outer toothing which can be coupled to the coaxial toothed ring.
  • the coaxial sprocket may comprise both a first portion with an external toothing and a second portion with an internal toothing.
  • the first section is for this particular one Embodiment for coupling with the intermediate shaft and the second for coupling with the drill sleeve.
  • the coaxial sprocket is rotatably mounted relative to the drive spindle between at least two positions on the drive spindle rotatably.
  • the displaceable coaxial sprocket is thus not only used in this embodiment, the torque transmission, but is also used to switch between at least two operating modes of the machine tool.
  • the countershaft is co-driven while it is stationary in the at least second of the at least two operating modes.
  • coaxial sprocket may further be rotatably mounted on the outer circumference of the drill sleeve to be relatively displaceable to the coupling portion.
  • an actuator may be provided which is connected to an actuating element and is able to displace the coaxial ring gear relative to the drive spindle.
  • the actuator may include a slide switch that is manually engaged by an operator different operating positions is displaced and due to its displacement, the actuator also shifts in such a way that a relative displacement of the coaxial ring gear is made to the drive spindle.
  • the wobble drive device may comprise a swash bearing which is received on the countershaft.
  • the wobble drive device is arranged with the swash bearing on the countershaft, the spur gear for transmitting the torque from the intermediate shaft to the drive spindle and the swash bearing can be arranged substantially parallel to each other. This makes it already possible to save space in the direction of the drilling tool axis. Furthermore, the torque transmission does not take place from the driven shaft directly to that shaft on which the wobble drive device is arranged, but via a separate shaft, namely the intermediate shaft. Thus, the wobble drive device, in particular the wobble bearing can be built closer toward the drive unit, since a collision with the driven shaft is not to be feared.
  • the present invention also relates to a machine tool with a rotating tool, which further comprises a drive unit for driving a driven shaft and a gear arrangement with the features of claim 1.
  • the Figure 1A shows a transmission assembly according to the invention, which is generally designated by the reference numeral 10.
  • the gear assembly 10 includes a driven shaft 12 which is driven by a drive unit, not shown, a drive spindle 14 and an intermediate shaft 20 and a countershaft 30.
  • the drive spindle 14 has at its free remote from the driven shaft 12 end 16 a tool holder for receiving a Tool, such as a drill or chisel on.
  • the drive spindle 14 comprises a drill sleeve 18 which engages in sections thereof.
  • the drive spindle 14 extends in a longitudinal direction L, which coincides with a tool axis (Bohrwerkmaschinemaschinese).
  • the intermediate shaft 20 is used in the present transmission assembly 10 for transmitting a drive torque from the driven shaft 12 to the drive spindle 14.
  • the intermediate shaft 20 has a first ring gear 22 which engages with an external toothing 12a of the driven shaft 12.
  • the drive torque is transmitted to the intermediate shaft 20 via the external teeth 12 a and the first ring gear 22.
  • the intermediate shaft 20 further includes a second ring gear 24 which engages with a Sprocket 28 is coaxial with the drill sleeve 18 and the drive spindle 14 is rotatably mounted on this.
  • the coaxial ring gear 28 engages around, as in the Figure 1A It can be seen, the drill sleeve 18. It is rotatable on its outer circumference and relative to the drill sleeve 18 in the direction of the longitudinal axis L displaceable (see also FIGS. 2 to 4 ) stored. In the embodiment shown, in particular, three different positions of the coaxial ring gear 28 are shown, through which this, as will be explained below, different modes of the gear assembly 10 and an associated machine tool can specify.
  • a tumble drive device 32 On the countershaft 30, which extends parallel to the intermediate shaft 20 and is arranged at a predetermined distance to this (see also FIG. 1B ), a tumble drive device 32 is arranged. This includes a swash bearing 34 which is rotatably connected to the intermediate shaft 20, and a connecting means 36 which is received in the manner of a ball joint in a corresponding receptacle 38a of a reciprocating piston or a exciter sleeve 38.
  • the wobble drive device 32 is used in a known manner to a rotational movement of the countershaft 30 in a translational movement T (see. Figures 3 and 4 ) and transfer them via an air spring on the exciter sleeve 38.
  • the countershaft 30 includes a ring gear 26, which may be in engagement with the coaxial ring gear 28 depending on the position of the coaxial ring gear 28 of the drill sleeve 28 or Not.
  • a ring gear 26 which may be in engagement with the coaxial ring gear 28 depending on the position of the coaxial ring gear 28 of the drill sleeve 28 or Not.
  • the gear assembly 10 includes a percussion mechanism, in the illustrated embodiment, an air cushion impactor 40 that includes a percussion piston (not shown), an anvil (not shown), and an exciter sleeve 38 and a drill sleeve 42, the exciter sleeve 38 being slidably received within the drill sleeve 42 is and with this forms the air cushion receiving space 42a.
  • the percussion piston and a reciprocating motion are offset, which is transmitted via the striker to a recorded in the tool holder of the drive spindle 14 tool. Consequently, when the countershaft 30 is driven via the coaxial sprocket 28, the wobble drive device 32 converts this rotational movement into a translational movement T which, with the aid of the percussion mechanism 40, generates a striking movement of the received tool.
  • the gear assembly 10 is at least partially accommodated in a housing G and thus protected against external influences, such as dust and dirt.
  • Both the intermediate shaft 20 and the countershaft 30 are rotatably mounted in the usual manner and over Fasteners 44 and 46 attached to the housing G.
  • FIG. 2 shows a first operating mode (drilling), in which the tool should only be put in a rotary motion.
  • the coaxial ring gear 28 assumes a first operating position (drilling position), in which it is in engagement with the ring gear 24 of the intermediate shaft 20 and is connected via a coupling portion 48 with the drill sleeve 18 in rotating engagement.
  • the drill sleeve 18 is thus rotated in this mode of the coaxial ring gear 28 and transmits this rotational movement in the usual way to a recorded in the tool holder tool.
  • the coaxial ring gear 28 is in its first operating position out of engagement with the ring gear 26 of the countershaft 30, so that no torque is transmitted to this.
  • the wobble drive device is therefore stationary, so that the striking mechanism 40 is also inactive.
  • the coaxial sprocket 28 is transferred by an adjusting movement S1 in its second operating position (Hammerbohr ein), so this still remains in engagement with the coupling portion 48 of the sleeve 18, so that the tool continues to perform a rotational movement.
  • the coaxial ring gear 28 engages with the ring gear 26 of the countershaft 30, whereby this is put into a rotary motion.
  • the tumble drive device 32 converts the rotary motion into a translational motion T and transmits it to the percussion mechanism 40.
  • the tool thus experiences a striking movement (hammer drilling operation) in addition to a rotary motion.
  • the coaxial ring gear 28 If the coaxial ring gear 28 is moved by a second displacement S2 along the longitudinal axis L in its third operating position (bit position), so it comes out of engagement with the coupling portion 48, whereby no rotational movement is transmitted to the drill sleeve 18. Consequently, a tool received by the tool holder is no longer subjected to a rotational movement by the torque of the driven shaft 12. However, the coaxial ring gear 28 remains in engagement with the ring gear 26 of the countershaft 30, so that via the wobble drive device 32 and the hammer mechanism 40 further a beating movement is transmitted to a recorded on the tool holder tool (hammer operation or chisel operation).

Claims (6)

  1. Dispositif d'entraînement (10) pour une machine-outil entraînée comportant un outil rotatif, comprenant :
    - une broche d'entraînement (14) pour assurer l'entraînement d'un outil,
    - une couronne dentée (28) coaxiale pouvant être couplée à la broche d'entraînement (14),
    - un arbre intermédiaire (20) qui transmet un couple d'entraînement d'un arbre entraîné (12) de la broche d'entraînement (14), dans lequel l'arbre intermédiaire (20) comporte une roue dentée (24) qui est en prise avec la couronne dentée (28) de la broche d'entraînement (14), et
    dans lequel le dispositif d'entraînement (10) est accessoirement en prise avec un arbre de renvoi (30) comportant une roue dentée (26),
    caractérisé en ce que la roue dentée (26) de l'arbre de renvoi (30) peut être amenée, selon le mode de fonctionnement de la machine-outil, en prise avec la couronne dentée coaxiale (28) de la broche d'entraînement (14), ou hors de prise avec la couronne dentée coaxiale (28) de la broche d'entraînement (14), dans lequel la broche d'entraînement (14) comporte une douille de perçage (18), comportant une section de couplage (48) qui peut être mise en prise avec la couronne dentée coaxiale (28) de la broche d'entraînement (14),
    que l'arbre de renvoi (30) est disposé parallèlement par rapport à l'arbre intermédiaire (20) et,
    qu'un instrument de frappe pneumatique (40) comportant une installation de pallier oscillant (32) est prévue, dans lequel l'installation d'un pallier oscillant (32) est couplée avec l'arbre de renvoi (30) et avec un mouvement en rotation de l'arbre de renvoi (30) dans un déplacement en translation (T) pouvant être transformé et transmis à l'instrument de frappe pneumatique (40).
  2. Dispositif d'entraînement (10) selon la revendication 1,
    caractérisé en ce que la couronne dentée coaxiale (28) est disposée relativement à la broche d'entraînement (14) de façon déplaçable en rotation entre au moins deux positions, sur la broche d'entraînement (14).
  3. Dispositif d'entraînement (10) selon l'une des revendications précédentes,
    caractérisé en ce que la couronne dentée coaxiale (28), disposée sur le rebord extérieur de la douille de perçage (18), est rotative et est montée relativement en coulissant vers la section de couplage (48).
  4. Dispositif d'entraînement selon l'une des revendications précédentes,
    caractérisé en ce qu'un organe de réglage est prévu, qui est couplé à un élément de fonctionnement et qui permet de déplacer la couronne dentée coaxiale relativement à la broche d'entraînement.
  5. Dispositif d'entraînement (10) selon l'une des revendications précédentes,
    caractérisé en ce que l'installation de pallier oscillant (32) comporte un pallier oscillant (34) qui est disposé sur l'arbre de renvoi (30).
  6. Machine outil avec un outil rotatif, une unité d'entraînement pour entraîner une broche entraînée ainsi qu'un dispositif d'entraînement avec les caractéristiques des revendications 1 à 5.
EP13176696.6A 2012-08-22 2013-07-16 Agencement d'engrenage pour une machine-outil et machine-outil Active EP2700477B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012214938.4A DE102012214938B4 (de) 2012-08-22 2012-08-22 Getriebeanordnung für eine angetriebene Werkzeugmaschine sowie Werkzeugmaschine mit einer solchen Getriebeanordnung

Publications (2)

Publication Number Publication Date
EP2700477A1 EP2700477A1 (fr) 2014-02-26
EP2700477B1 true EP2700477B1 (fr) 2017-12-06

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Application Number Title Priority Date Filing Date
EP13176696.6A Active EP2700477B1 (fr) 2012-08-22 2013-07-16 Agencement d'engrenage pour une machine-outil et machine-outil

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EP (1) EP2700477B1 (fr)
DE (1) DE102012214938B4 (fr)
RU (1) RU2576747C2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017121717A1 (de) 2017-09-19 2019-03-21 Metabowerke Gmbh Stellglied und Getriebeanordnung für eine angetriebene Werkzeugmaschine
DE102017121720A1 (de) 2017-09-19 2019-03-21 Metabowerke Gmbh Getriebeanordnung für eine angetriebene Werkzeugmaschine
JP7360891B2 (ja) 2019-10-21 2023-10-13 株式会社マキタ ハンマドリル
JP7465647B2 (ja) 2019-10-21 2024-04-11 株式会社マキタ ハンマドリル
US11826891B2 (en) 2019-10-21 2023-11-28 Makita Corporation Power tool having hammer mechanism

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Publication number Priority date Publication date Assignee Title
DE2242944B2 (de) * 1972-08-31 1981-04-23 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
US4158313A (en) * 1977-07-13 1979-06-19 Smith Arthur W Electric hand tool
SU968290A1 (ru) * 1980-12-17 1982-10-23 Копейский Ордена Трудового Красного Знамени Машиностроительный Завод Им.С.М.Кирова Бурова установка с автоматическим выбором режимов бурени
SU1046494A1 (ru) * 1982-06-17 1983-10-07 Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Горнорудного Машиностроения Вращатель бурового станка
SU1504322A2 (ru) * 1987-11-02 1989-08-30 Горловский филиал Донецкого политехнического института Буровой станок
DE19651828A1 (de) 1996-12-13 1998-06-18 Bosch Gmbh Robert Mehrganggetriebe für Handwerkzeugmaschinen
RU2224076C1 (ru) * 2002-07-02 2004-02-20 Носов Олег Николаевич Бурильная машина
DE102006000515A1 (de) * 2006-12-12 2008-06-19 Hilti Ag Elektrisches Handwerkzeuggerät
EP2147753B1 (fr) * 2008-07-25 2017-01-18 AEG Electric Tools GmbH Outil électrique doté d'une commutation de transmission
DE102008054458A1 (de) * 2008-12-10 2010-06-17 Robert Bosch Gmbh Handwerkzeugmaschine
DE102009028633A1 (de) * 2009-08-19 2011-02-24 Robert Bosch Gmbh Vorrichtung für eine Handwerkzeugmaschine und Handwerkzeugmaschine

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Also Published As

Publication number Publication date
EP2700477A1 (fr) 2014-02-26
RU2576747C2 (ru) 2016-03-10
DE102012214938A1 (de) 2014-02-27
RU2013139021A (ru) 2015-02-27
DE102012214938B4 (de) 2016-11-10

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