EP1940593B1 - Machine-outil electrique - Google Patents

Machine-outil electrique Download PDF

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Publication number
EP1940593B1
EP1940593B1 EP06764339.5A EP06764339A EP1940593B1 EP 1940593 B1 EP1940593 B1 EP 1940593B1 EP 06764339 A EP06764339 A EP 06764339A EP 1940593 B1 EP1940593 B1 EP 1940593B1
Authority
EP
European Patent Office
Prior art keywords
electric machine
machine tool
tool according
drive
housing
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.)
Not-in-force
Application number
EP06764339.5A
Other languages
German (de)
English (en)
Other versions
EP1940593A1 (fr
Inventor
Dietmar Saur
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 EP1940593A1 publication Critical patent/EP1940593A1/fr
Application granted granted Critical
Publication of EP1940593B1 publication Critical patent/EP1940593B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25D17/24—Damping the reaction force
    • 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
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means
    • 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
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms
    • 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
    • B25D2250/121—Housing 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
    • B25D2250/371—Use of springs

Definitions

  • the invention relates to a power tool according to the preamble of claim 1 and as from GB 2 154 497 A known.
  • vibrations are generated in particular from a striking mechanism, which lead to a faster fatigue and a reduction of holding forces of an operator. Vibrations transmitted from a machining location via the machining tool can amplify such vibrations. It is known to reduce such vibrations or vibrations, for example in the form of handles that are partially rubberized. A vibration damping achieved thereby is often only insufficient.
  • the EP 0 829 237 A2 relates to a power tool, comprising a drive unit and a gear unit, which are each arranged in a housing part shell. Between the units, an elastic member is mounted, wherein the elastic member is formed either as a clutch which connects the drive-side output shaft to the transmission-side drive shaft, or as an intermediate piece between the motor module and head module housings.
  • the DE 103 13 782 A1 relates to an electric hand tool, which is shown in pistol construction.
  • a housing separating plane between a drive-side housing half and a transmission-side housing half (transmission housing) is provided. It is provided an intermediate flange, which is arranged substantially in the housing half, in which also the gear is mounted, and which extends in some areas in the housing half.
  • an intermediate flange is divided into a drive-side and a transmission-side bearing bridge element, which are interconnected via a vibration damping device.
  • the vibration damping device is integrated into the electric machine tool, so that no additional housing parts such as housing shells or a double or shell casing are required. It can thus the compact design of power tools, especially those in gun design, bill be taken into account.
  • the power tool according to the invention is characterized by a simple installation.
  • the bearing bridge elements are arranged in separate, non-overlapping housing part shells, wherein the drive-side bearing bridge element is connected to the drive-side housing shell and the transmission-side bearing bridge element, which serves to accommodate Schlagtechniksutz with the transmission-side housing shell.
  • the invention provides that a seal to the outside via an elastic seal.
  • the housing part shells are connected to each other, and at the same time so that an additional damping effect can be achieved.
  • the elastic seal is good from the outside recognizable and can be used at the same time as a means of detection for the user.
  • the vibration damping device itself can be realized depending on the space and designed as a spring element with or without vibration damping.
  • a compression spring or a leaf spring is used as the vibration damping device.
  • vibration damping in the form of a rubber element, which simultaneously acts as a screwing and sealing unit.
  • a vibration damping is provided for example in an angle grinder.
  • the bearing bridge elements can be screwed, for example, with the housing part shells.
  • the housing part shells serve to receive a drive unit and a transmission unit.
  • the advantage here is that the vibration damping device is arranged between two approximately equal mass parts. This results in a particularly favorable decoupling of the vibrations generated.
  • the vibration damping device is disposed between the bearing bridge elements or between the drive and the gearbox-side housing part shell and thus housed in a lubricated and dust-proof area.
  • the housing shell parts may be formed, for example, of an elastomer.
  • a fixed stop is advantageously realized, so that a path for the vibration damping, which is on the order of a few Moved millimeters, is limited by the housing shell parts.
  • other known materials for the housing part shells possible, for example, light metal or plastic, spielmik, glass fiber reinforced polyamide.
  • An axial preload can be produced via a screw connection or another connection between the housing part shells.
  • a toothing on an armature shaft can therefore be borderline, because often less than 10 teeth are provided.
  • a spur gear can be arranged on the drive-side bearing bridge element.
  • the drive train is interrupted on the toothed shaft to the spur gear, wherein the toothed shaft is connectable via a coupling.
  • the coupling is expediently designed to be axially displaceable. Depending on the product or vibration amplitude, the coupling may be designed differently. It is possible to use bar, plate, bellows or universal couplings or other couplings that can compensate for a deflection of the vibration damping device. At low transmission torques, a non-contact coupling, for example a magnetic coupling, can also be provided.
  • the electric power tool according to the invention is due to the inventive arrangement of the vibration damping arrangement between the drive and the transmission side housing shell particularly suitable for use in devices in Piskolenbauweise, because their compact design is not affected.
  • a hand-held power tool gun-style with a handle 26 is shown.
  • the power tool usually includes various functional components such as a drive unit 10, such as an electric motor, a gear unit 11 and a unit for mounting and supporting a toothed shaft 14, with a designed as a spindle 24 tool holder for receiving a in the Fig. 1
  • a drive unit 10 such as an electric motor
  • gear unit 11 such as a gear unit 11
  • gear unit 11 for mounting and supporting a toothed shaft 14
  • a designed as a spindle 24 tool holder for receiving a in the Fig. 1
  • Unrecognizable plug-in tool is connected force-transmitting.
  • the plug-in tool for example a screw or drill bit, can be driven in rotation and / or hammering manner.
  • the said functional modules are lined up axially in the present gun construction and non-positively and / or positively coupled with each other.
  • a drive shaft 22 of an armature shaft 29, an axis 22b of the toothed shaft 14 and an axis 22a of a spindle 24 are arranged axially parallel, resulting in a particularly handy embodiment with a favorable power transmission in a drilling axis.
  • the drive unit 10 and the gear unit 11 are arranged in separate housing part shells 16, 17, which have an in Fig. 2 recognizable vibration damping device 15 are connected to each other.
  • the Gerissauseteüschien 16, 17 are connected by an elastic seal 18 with each other, which seal a space between the housing part shells 17, 18 to the outside and at the same time have a vibration-damping effect.
  • Fig. 2 is a longitudinal section through an embodiment of the power tool according to the invention shown.
  • a usually one-piece intermediate flange is divided in the power tool according to the invention in a drive-side and a transmission side bearing bridge element 12, 13, which are connected to each other via a vibration damping device 15.
  • the drive-side bearing bridge element 12 is arranged in a drive-side housing shell 16 and serves to support a spur gear 20.
  • the gear-side bearing bridge element 13 is used for mounting a drive train with a drive bearing 32 and a toothed shaft 14 and a striking mechanism 23, which are arranged in a hammer tube or hammer tube 31.
  • the toothed shaft 14 is interrupted to the spur gear 20 and connectable via a coupling 21.
  • the clutch 21 is in the Fig. 2 designed as a sliding toothing, the coupling path is designed so that a deflection of the vibration damping can take place.
  • the vibration damping takes place predominantly via the vibration damping device 15 which is arranged between the two bearing bridge elements 12, 13 and in a grease space 44 and which is designed as a compression spring.
  • the vibration damping also takes place via an elastic seal 18, which seals a space between the two housing part shells 16, 17.
  • An axial preload between the Housing part shells 16, 17 can be produced via an unrecognizable screw.
  • the armature shaft 29 transmits via a toothing 30 its rotary motion to an external toothing of the spur gear 20, which is in operative connection with the toothed shaft 14.
  • the drive bearing 32 may be mounted by means of ball bearings in the bearing bridge element 13, or, as in Fig. 2
  • a rotational drive between the drive bearing 32 and the toothed shaft 14 can be controlled via a switching device 28, wherein between a position striking mechanism 23 on / off is selected.
  • the rotational drive is realized via driving body 33, which are embedded radially in a toothed sleeve 34.
  • the drive bearing 32 of the impact mechanism 23 drives a wobble finger 35, which converts a rotational movement of the drive bearing 32 in an axial, striking movement.
  • the wobble finger 35 is mounted in a conventional manner on an outer side 36 of the drive bearing 32.
  • the drive energy can be interrupted or transmitted to the striking mechanism 31 in a known manner.
  • FIG. 3 is a detailed view of an alternative designed as a kinematic hinge connection vibration damping device 15 is shown.
  • a toggle lever 45 with a spring element 15 establishes a connection between a drive-side bearing bridge element 12 and a transmission-side bearing bridge element 13 via two intersecting elements 46, 47.
  • the structure corresponds essentially to that in Fig. 1 and will not be detailed here to avoid repetition.
  • a relative movement between the housing part shells 16, 17, as occurs during operation of the device, in particular during impact drilling, is absorbed by the formed by the toggle lever 45 linear or rotary joint. As a result, a vibration damping is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Vibration Prevention Devices (AREA)

Claims (8)

  1. Machine-outil électrique, en particulier sous forme de pistolet, comprenant une unité d'entraînement (10) et une unité de transmission (11), au moins l'unité d'entraînement (10) étant supportée sur une bride intermédiaire et étant prévue pour l'entraînement d'une chaîne cinématique avec un arbre denté (14), la bride intermédiaire étant divisée en un élément de pont de palier côté entraînement (12) et en un élément de pont de palier côté transmission (13), lesquels sont connectés l'un à l'autre par le biais d'un dispositif d'amortissement des vibrations (15), caractérisée en ce que les éléments de pont de palier (12, 13) sont disposés dans des coques partielles de boîtier séparées (16, 17), les coques partielles de boîtier (16, 17) ne s'engageant pas l'une sur l'autre et étant connectées par un joint d'étanchéité élastique (18) en vue de réaliser l'étanchéité vis-à-vis de l'extérieur.
  2. Machine-outil électrique selon la revendication 1, caractérisée en ce que le dispositif d'amortissement des vibrations (15) est réalisé sous forme d'élément de ressort.
  3. Machine-outil électrique selon la revendication 1 ou 2, caractérisée en ce que le dispositif d'amortissement des vibrations (15) est réalisé sous forme d'unité articulée.
  4. Machine-outil électrique selon l'une quelconque des revendications précédentes, caractérisée en ce que le joint d'étanchéité (18) est réalisé de telle sorte qu'un élément d'étanchéité (19) soit intégré.
  5. Machine-outil électrique selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une précontrainte axiale peut être établie par le biais d'un vissage entre les coques partielles de boîtier (16, 17).
  6. Machine-outil électrique selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un pignon droit (20) est disposé sur l'élément de pont de palier (12) côté entraînement.
  7. Machine-outil électrique selon la revendication 6, caractérisée en ce que l'arbre denté (14) est interrompu en direction du pignon droit (20).
  8. Machine-outil électrique selon la revendication 6 ou 7, caractérisée en ce que l'arbre denté (14) peut être connecté par le biais d'un accouplement (21).
EP06764339.5A 2005-10-04 2006-08-25 Machine-outil electrique Not-in-force EP1940593B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005047353A DE102005047353A1 (de) 2005-10-04 2005-10-04 Elektrowerkzeugmaschine
PCT/EP2006/065691 WO2007039356A1 (fr) 2005-10-04 2006-08-25 Machine-outil electrique

Publications (2)

Publication Number Publication Date
EP1940593A1 EP1940593A1 (fr) 2008-07-09
EP1940593B1 true EP1940593B1 (fr) 2015-01-28

Family

ID=37137536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06764339.5A Not-in-force EP1940593B1 (fr) 2005-10-04 2006-08-25 Machine-outil electrique

Country Status (6)

Country Link
US (1) US20110011608A1 (fr)
EP (1) EP1940593B1 (fr)
JP (1) JP2009509790A (fr)
CN (1) CN101282821B (fr)
DE (1) DE102005047353A1 (fr)
WO (1) WO2007039356A1 (fr)

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Also Published As

Publication number Publication date
CN101282821A (zh) 2008-10-08
WO2007039356A1 (fr) 2007-04-12
JP2009509790A (ja) 2009-03-12
CN101282821B (zh) 2012-11-14
EP1940593A1 (fr) 2008-07-09
US20110011608A1 (en) 2011-01-20
DE102005047353A1 (de) 2007-04-05

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