EP1965952B1 - Machine-outil a main pourvue d'un ensemble transmission et d'une unite de decouplage - Google Patents

Machine-outil a main pourvue d'un ensemble transmission et d'une unite de decouplage Download PDF

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Publication number
EP1965952B1
EP1965952B1 EP06819287A EP06819287A EP1965952B1 EP 1965952 B1 EP1965952 B1 EP 1965952B1 EP 06819287 A EP06819287 A EP 06819287A EP 06819287 A EP06819287 A EP 06819287A EP 1965952 B1 EP1965952 B1 EP 1965952B1
Authority
EP
European Patent Office
Prior art keywords
unit
decoupling
housing
drive
designed
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 - Fee Related
Application number
EP06819287A
Other languages
German (de)
English (en)
Other versions
EP1965952A2 (fr
Inventor
Otto Baumann
Thomas Bernhardt
Hardy Schmid
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 EP1965952A2 publication Critical patent/EP1965952A2/fr
Application granted granted Critical
Publication of EP1965952B1 publication Critical patent/EP1965952B1/fr
Expired - Fee Related 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
    • 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
    • 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
    • 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
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle

Definitions

  • the invention is based on a handheld power tool with a drive train and a decoupling unit according to the preamble of claim 1.
  • Hand tool machines in particular rotary hammers, are already known, which have a decoupling unit for reducing vibration transmission.
  • a decoupling unit for reducing vibration transmission.
  • the hand tool machines in this case have a drive train generally comprising a gear unit and a motor unit.
  • a handheld utility machine according to the preamble of claim 1 is made EP 829 237 A known.
  • the invention is based on a hand-held power tool with a drive train and with at least one decoupling unit.
  • the decoupling unit is arranged between two drive train units.
  • a “decoupling unit” is to be understood in particular as a damping unit and / or a unit for vibration isolation.
  • between in particular an arrangement spatially and / or in a power flow between the Antriebsstrangüen be understood.
  • a decoupling of large masses, in particular a vibration decoupling between two masses can be achieved.
  • the vibration of the power tool and a vibration transmission to an operator of the power tool can be reduced.
  • the decoupling unit is arranged between a drive unit and a transmission unit of the drive train. This can be achieved a reduction in the vibrations in one of the two output units. In addition, a longer life of the electrical components in the vibration-reduced drive unit of the power tool can be achieved by this decoupling unit.
  • a housing unit of the drive unit has a coupling point for fastening an additional handle.
  • a "coupling point” is to be understood in this context in particular a specially trained, equipped and / or specially provided location for attachment of an additional handle, which preferably has special fastening means, such as recesses, extensions, etc.
  • This can be advantageously achieved by the housing unit of Drive unit is extended in an advantageous direction.
  • the advantage here is that the additional handle can be attached to the vibration-insulated drive unit. Thus, both contact points of the operator can be vibration decoupled with the power tool.
  • the decoupling unit has at least two decoupling degrees of freedom, whereby a compensation movement in several directions between the Antriebsstrangüen allows and connected to a reduction of a vibration transmission can be achieved in several directions.
  • the decoupling unit comprises at least one decoupling means, which is intended to effect a decoupling by a deformation, preferably by an elastic deformation, whereby a wear in the decoupling unit can be avoided by external friction.
  • the decoupling unit has a bellows-shaped decoupling means, whereby a wear-free decoupling, even with high-frequency relative movements, and an advantageous deformation can be achieved.
  • a “bellows-shaped" decoupling means should in particular be understood as meaning a decoupling means which is thin-walled for areal extent and which is folded at least in partial areas.
  • the decoupling means has a radial orientation in at least one area.
  • a "radial alignment" should be understood to mean that at least one outer surface and / or an inner surface of the decoupling means, in particular a wall of the decoupling means, has at least one radial component in its orientation.
  • the decoupling unit is at least partially designed in one piece with another functional means, whereby components, space, weight, assembly costs and costs can be saved.
  • a "further functional agent” is to be understood as meaning any agent which appears appropriate to a person skilled in the art and which, in addition to a decoupling and / or a force transmission, has a further function, in particular co-rotating functional agent. This advantageously offers a fan unit.
  • the handheld power tool has a guide unit comprising at least one spring-loaded guide means, which is provided for guiding at least one of the drive train units. It can be achieved in addition to an advantageous decoupling a stable hand machine tool.
  • the guide unit has at least one decoupling means for mounting a guide element, unwanted vibration transmissions via the guide unit can at least be reduced.
  • the solution according to the invention can be used in all hand-held power tools that appear to be suitable for the person skilled in the art, but particularly advantageous in hand-held power tools with beating drivetrain units, such as in particular rotary hammers and Meiselphasemmern etc.
  • FIG. 1 shows a hand tool 10a formed by a hammer drill in a side view.
  • This comprises a drive unit 12a having its own housing unit 14a designed as a drive housing, a gear unit 16a having its own housing unit 18a designed as a gear housing, and a bellows-shaped decoupling unit 20a arranged between the drive unit 12a and the gear unit 16a.
  • the transmission unit 16a has an indicated percussion unit.
  • a main handle 24a which is formed essentially perpendicularly to a longitudinal axis 22a of the handheld power tool 10a, is integrally formed on the housing unit 14a designed as a drive housing and comprises an actuating switch.
  • the housing unit 14a designed as a drive housing forms a receiving area 26a for the decoupling unit 20a and a half-shell-shaped receiving area 28a for the housing unit 18a (FIG. FIGS. 1 and 2 ).
  • a sleeve-shaped receiving region 32a in which the gear unit 16a is mounted via a plain bearing bush 34a, adjoins the half-shell-shaped receiving region 28a in the direction of a tool receiving region 30a of the handheld power tool 10a.
  • the plain bearing bush 34a is surrounded by a bushing consisting of vibration-damping rubber material.
  • the housing unit 18a in the form of a gear housing is held in a stable, vibration-damped position relative to the housing unit 14a via a plurality of plain bearing bushes 36a, which are guided in oblong holes 38a of the half-shell-shaped receiving area 28a of the housing unit 14a.
  • the sleeve-shaped region of the housing unit 14a designed as a drive housing comprises a coupling point 40a for an additional handle 42a.
  • the decoupling unit 20a comprises a decoupling means 44a formed as an elastic bellows coupling made of an elastic plastic, by means of which a decoupling of vibrations in the axial direction 54a and in the radial direction 56a between the gear unit 16a and the drive unit 12a can take place.
  • a decoupling of vibrations in the axial direction 54a and in the radial direction 56a between the gear unit 16a and the drive unit 12a can take place.
  • an elastic plastic further materials which appear appropriate to the person skilled in the art, such as e.g. Rubber materials, metal compounds, etc., conceivable for forming the decoupling unit 20a.
  • the decoupling means 44a has two plate-shaped, thin-walled and mutually mirror-symmetrically arranged partial regions 62a, 64a, wherein a partial region 62a of the drive unit 12a and the opposite partial region 64a of the gear unit 16a faces. Instead of mirror symmetry, however, the subregions can be different, different Requirements adapted to be executed.
  • the walls of the two sections 62a, 64a of the decoupling means 44a are additionally provided with a wrinkled structure, whereby the decoupling means 44a receives a strong vibration damping property.
  • a drive torque of the drive unit 12a is conducted via the decoupling unit 20a to the gear unit 16a, with vibration decoupling taking place in parallel between the gear unit 16a and the drive unit 12a.
  • a drive shaft 58a of the drive unit 12a is in this case inserted into a recess 58a of the drive unit 12a facing portion 62a and is connected via a non-illustrated positive locking in the circumferential direction with the portion 62a of the decoupling unit 20a.
  • the gear unit 16a facing portion 64a also has a coaxial to the drive shaft 58a recess into which a gear shaft 60a of the gear unit 16a is inserted.
  • the transmission shaft 60a is connected in accordance with the drive shaft 58a via a non-illustrated positive engagement in the circumferential direction with the portion 64a of the decoupling unit 20a. By means of the transmission shaft 60a, the torque is transmitted to the transmission unit 16a.
  • FIG. 2 is the hand tool 10a off FIG. 1 with a guide unit 46a of the drive unit designed as a housing unit 14a in a side view, which serves for guiding the housing unit designed as a transmission housing 18a within the housing unit 14a.
  • a guide unit 46a of the drive unit designed as a housing unit 14a in a side view, which serves for guiding the housing unit designed as a transmission housing 18a within the housing unit 14a.
  • this is connected on both sides by three guide elements 48a, 50a, 52a formed by shoulder screws 68a to the housing unit 14a designed as a drive housing ( Figures 2 and 4 ).
  • the guide elements 48a, 50a, 52a are fixedly connected to the housing unit designed as a gear housing 18a and movably arranged in slots 38a of the housing unit 14a in the axial direction 54a and are screw heads of the guide screws formed by the shoulder screws 48a, 50a, 52a in the oblong holes 38a secured ( Figures 2 and 3 ). Due to the guidance of the guide elements 48a, 50a, 52a in the oblong holes 38a, a relative movement is possible from the housing unit 18a designed as a gear housing to the housing unit 14a, which can take place in combination with the decoupling unit 20a in a vibration-decoupled manner to the housing unit 14a.
  • guide elements 66a designed as prestressed spring assemblies are mounted on both sides between the guide elements 48a and 50a and the housing unit 14a designed as a drive housing in the axial direction 54a.
  • the guide means 66a is located in the idle state of the power tool 10a designed as a gear housing housing unit 18a relative to the housing unit 14a in a stable starting position.
  • spring forces of the guide means 66a counteract the movement until the housing unit 18a is again in a stable position.
  • This guide means 66a thus enable a stable guidance of the hand tool 10a and, in addition to the decoupling unit 20a, act in a vibration-damping manner on the housing unit 14a designed as a drive housing.
  • the housing unit 14a In the vibration-damped guide between the housing unit 14a designed as a drive housing and the housing unit 18a designed as a gear housing, the housing unit 14a, which is oval in cross-section and comprises the housing unit 18a, is arranged at a distance from the housing unit 18a designed as a gear housing ( FIGS. 3 and 4
  • the guide elements 48a, 50a, 52a are guided via bushing units 84a in, in the elongated holes 38a introduced, each adapted to the shape of the slots 38a plain bearing bushes 76a made of metal.
  • the cylindrically shaped bushing units 84a have a decoupling means 86a designed as a rubber bushing and a metal plain bearing bush 36a enclosing the decoupling means 86a.
  • a guide unit 46a may be provided with the guide elements 48a and 50a and a cross-link unit 70a ( Figures 2 and 5 ).
  • the cross-link unit 70a is composed of two laterally arranged crossbars 72a, which are coupled by the guide elements 50a attached on both sides to the housing unit 14a designed as a drive housing.
  • the crossbars 72a are arranged perpendicular to the longitudinal axis 22a aligned between the designed as a drive housing housing unit 14a and designed as a gear housing housing unit 18a.
  • An axle 74a which is mounted in rubber and oriented perpendicular to the longitudinal axis 22a and substantially perpendicular to the main handle 24a, connects the crossbars 72a to the housing unit 18a in the form of a transmission housing.
  • a guidance of the gear unit 16a in the housing unit 14a designed as a drive housing can be achieved and, in addition, a vibration decoupling between the gear unit 16a and the drive unit 12a can be ensured.
  • the guide elements 48a, 50a are also supported on the guide unit 46a via the prestressed spring assemblies 66a on the housing unit 14a designed as a drive housing.
  • FIG. 6 shows an alternative bellows-shaped decoupling unit of a hand tool. Substantially corresponding components and features are in principle numbered with the same reference numerals, and to distinguish the exemplary embodiments, the reference numerals refer to the letters a (FIG. FIG. 1 to FIG. 5 ) or b ( FIG. 6 ) are added. Furthermore, with regard to features and functions that remain the same, it is possible to refer to the description of the exemplary embodiment in FIG. 1 to get expelled. In the FIG. 6 The following description is essentially limited to the differences from the exemplary embodiment in FIGS FIGS. 1 to 5 ,
  • the decoupling unit 20b has only a plate-shaped partial area 62b which is spring-elastic in the radial 56b and axial direction 54b, the latter being located on the side of the decoupling unit 20b facing a gear unit 16b.
  • the decoupling unit 20b is formed integrally in a multi-component, in particular a two-component method on a functional unit comprising a fan unit 78b.
  • the fan unit 78b has on the side facing the portion 62b an annular disc 90b, which is connected in its outer edge region with the resilient portion 62b of the decoupling unit 20b and to the on the drive unit 12b side facing fan blades 92b are integrally formed, for cooling the drive unit 12b are provided.
  • An air supply of the fan unit 78b via ventilation openings 80b, which are introduced into a housing wall of the housing formed as a drive unit 14b. Via air ducts 82b, an air flow is forwarded to the drive unit 12b.
  • the fan unit 78b is non-rotatably coupled to a drive shaft 58b, while the resilient portion 62b of the decoupling unit 20b is non-rotatably connected to a transmission shaft 60b.
  • the resilient portion 62b is pressed by means of a screw 94b to an end face of the transmission shaft 60b and connected via non-illustrated positive locking elements in the circumferential direction form-fitting manner with the transmission shaft 60b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Harvester Elements (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

Machine-outil à main pourvue d'un ensemble transmission (12a; 12b) et d'au moins une unité de découplage (20a; 20b). Selon la présente invention, l'unité de découplage (20a; 20b) est située entre deux unités (12a; 12b; 16a; 16b) de l'ensemble transmission.

Claims (3)

  1. Machine-outil à main comprenant un ensemble de transmission et au moins une unité de découplage (20a ; 20b), l'unité de découplage (20a ; 20b) étant disposée entre deux unités d'ensemble de transmission (12a ; 12b ; 16a ; 16b), l'unité de découplage (20a ; 20b) présentant au moins deux degrés de liberté de découplage, un découplage des oscillations pouvant être réalisé dans la direction axiale (54a ; 54b) et dans la direction radiale (56a ; 56b) entre les unités d'ensemble de transmission (12a ; 12b ; 16a ; 16b) par le biais du moyen de découplage (44a ; 44b),
    caractérisée en ce que la machine-outil à main est un marteau perforateur et en ce que l'unité de découplage (20a ; 20b) comprend un moyen de découplage (44a ; 44b) réalisé sous forme d'accouplement à soufflet.
  2. Marteau perforateur selon la revendication 1, caractérisé en ce que le moyen de découplage (44a) présente deux régions partielles (62a, 64a) en forme de plateaux, à parois minces et disposées suivant une symétrie spéculaire l'une par rapport à l'autre, une région partielle (62a) étant tournée vers une unité d'entraînement (12a) et la région partielle opposée (64a) étant tournée vers une unité de transmission (16a).
  3. Marteau perforateur selon la revendication 1 ou 2, caractérisé en ce que les moyens de découplage (44a ; 44b) sont formés en un plastique élastique.
EP06819287A 2005-12-12 2006-11-07 Machine-outil a main pourvue d'un ensemble transmission et d'une unite de decouplage Expired - Fee Related EP1965952B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005059180A DE102005059180A1 (de) 2005-12-12 2005-12-12 Handwerkzeugmaschine mit einem Antriebsstrang und einer Entkopplungseinheit
PCT/EP2006/068165 WO2007068535A2 (fr) 2005-12-12 2006-11-07 Machine-outil a main pourvue d'un ensemble transmission et d'une unite de decouplage

Publications (2)

Publication Number Publication Date
EP1965952A2 EP1965952A2 (fr) 2008-09-10
EP1965952B1 true EP1965952B1 (fr) 2012-06-13

Family

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Family Applications (1)

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EP06819287A Expired - Fee Related EP1965952B1 (fr) 2005-12-12 2006-11-07 Machine-outil a main pourvue d'un ensemble transmission et d'une unite de decouplage

Country Status (5)

Country Link
US (1) US20090266571A1 (fr)
EP (1) EP1965952B1 (fr)
CN (1) CN101331006A (fr)
DE (1) DE102005059180A1 (fr)
WO (1) WO2007068535A2 (fr)

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JP7229807B2 (ja) 2019-02-21 2023-02-28 株式会社マキタ 電動工具

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CN101331006A (zh) 2008-12-24
WO2007068535A3 (fr) 2007-10-11
WO2007068535A2 (fr) 2007-06-21
EP1965952A2 (fr) 2008-09-10
DE102005059180A1 (de) 2007-06-14
US20090266571A1 (en) 2009-10-29

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