EP1420921B1 - Machine-outil, en particulier marteau perforateur et/ou burineur - Google Patents

Machine-outil, en particulier marteau perforateur et/ou burineur Download PDF

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Publication number
EP1420921B1
EP1420921B1 EP02729784A EP02729784A EP1420921B1 EP 1420921 B1 EP1420921 B1 EP 1420921B1 EP 02729784 A EP02729784 A EP 02729784A EP 02729784 A EP02729784 A EP 02729784A EP 1420921 B1 EP1420921 B1 EP 1420921B1
Authority
EP
European Patent Office
Prior art keywords
bearing
intermediate shaft
power tool
portable power
radial bearing
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 - Lifetime
Application number
EP02729784A
Other languages
German (de)
English (en)
Other versions
EP1420921A1 (fr
Inventor
Rolf Mueller
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 EP1420921A1 publication Critical patent/EP1420921A1/fr
Application granted granted Critical
Publication of EP1420921B1 publication Critical patent/EP1420921B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to a hand tool, in particular a drill and / or chisel hammer, according to the preamble of claim 1, see also EP 589337 A ,
  • a rotary and chipping hammer with a percussion mechanism having a drive bearing.
  • the drive bearing has a rotatably mounted on an intermediate shaft body, which has a ground ball raceway in its radially outer region, which is arranged on a tilted in the axial direction of the intermediate shaft plane.
  • the main body is driven in rotation via a releasable coupling.
  • a functional unit of the drive bearing is arranged with an annular bearing seat and with a bolt which is rotatably connected to the base body via balls guided in the ball raceway.
  • the bolt of Functional unit is slidably mounted in a transverse bore of a pivotally mounted transverse pin of a piston of the hammer mechanism and is thereby drivingly connected to the piston.
  • the main body is driven in rotation and the bolt of the functional unit and the piston in the axial direction reciprocally moved, whereby an alternating axial load of the drive bearing is formed.
  • a ball track of a deep groove ball bearing is ground into the base body of the drive bearing in a radially outer region, via which the drive bearing is fixed in a housing of the drill and chisel hammer in both axial directions.
  • the invention relates to a hand tool, in particular a drill and / or chisel hammer, with a hammer mechanism, which has a drive shaft rotatably mounted on an intermediate shaft, via which a piston in the axial direction reciprocally driven.
  • the drive bearing is supported via a radial bearing in at least one axial direction via the intermediate shaft. It is an accurate positioning of the drive bearing on the intermediate shaft achievable, and the drive bearing can be structurally preassembled easily on the intermediate shaft and in the assembled state with the intermediate shaft be installed in the power tool. If the drive bearing supported by a radial bearing, which can absorb axial forces in two directions, in particular components and space can be saved.
  • space can be saved by the radial bearing is arranged in an inner region of a base body of the drive bearing, in particular when a space of the radial bearing is superimposed with a space of a functional unit of the drive bearing in the axial direction.
  • the radial bearing can in principle be formed by a sliding bearing.
  • the radial bearing is formed by a roller bearing, a low-cost component can be used which has a low friction due to a rolling movement of rolling elements, and an advantageous idling property of the drive bearing can be achieved.
  • the radial bearing is mounted by a press fit on the intermediate shaft.
  • the drive bearing is structurally simple over the interference fit in the axial direction supported on the intermediate shaft.
  • the radial bearing can also be connected to the intermediate shaft via other, the expert appears useful, non-positive, positive and / or cohesive connections, such as a snap ring, a ground in the intermediate shaft ball raceway, a non-positive locking ring, etc.
  • the intermediate shaft and / or the drive bearing forms a part of the radial bearing, namely For example, by a ball raceway is ground into the intermediate shaft and / or in the drive bearing or the main body of the drive bearing. Additional components, space, weight, installation costs and costs can be saved.
  • the arranged on the intermediate shaft and axial forces receiving component may be formed by a form-fitting, non-positively and / or cohesively mounted on the intermediate shaft circlip or by another, the skilled person appear useful as a component. If the rolling bearing is arranged on a side of the drive bearing remote from a tool receptacle, advantageous space utilization can be achieved and, in particular, an already existing component, in particular a gear, can be used structurally for additional axial support and additional components can be saved.
  • Fig. 1 shows a schematically illustrated drill and chisel hammer with a not shown in a housing 42 electric motor and a transmission and a striking mechanism. Contrary to an actuating direction 48 after the tool holder 44, a first, perpendicular to the operating direction 48 extending handle 50 is secured to the housing 42. On a side facing away from the tool 46 of the housing 42, a second, perpendicular to the actuating direction 48 extending, bow-shaped handle 52 is arranged, which is connected at its side facing away from a tool axis first end via a hinge 54 with a transverse to the actuating direction 48 pivot axis with the housing 42. At its second end, the handle 52 is connected to the housing 42 via a vibration isolating device.
  • the electric motor has a drive shaft on which a pinion is formed.
  • the pinion meshes with a spur gear 22, which is arranged on a side facing away from a tool holder 44 side of an intermediate shaft 10 rotatably ( Fig. 2 ).
  • About the intermediate shaft 10 is a held in the tool holder 44 drill 46 on the percussion striking and over a designed as a hollow shaft work spindle 68 rotatably driven.
  • a drive bearing 12 On a side facing the tool holder 44 of the spur gear 22, a drive bearing 12 is arranged, which has a base body 72 which is rotatably mounted on the intermediate shaft 10 via a needle bearing 70.
  • the Grundraj'72 has on its the tool holder 44 facing end side of an integrally formed rotational engagement toothing 24.
  • the collar 32 forms a part of the radial bearing 16, which is formed as balls rolling elements 28 roll radially outward on a ground in the radially inwardly facing side of the collar 32 ball raceway 26. Radially to inside the rolling elements 28 roll on a bearing inner ring 30 of the radial bearing 16.
  • bearing inner ring 30 is supported with its side facing away from the tool holder 44 side 36 on the spur gear 22, which is also mounted with a press fit on the intermediate shaft 10.
  • the bearing inner ring 30 and the spur gear 22 are pressed onto the intermediate shaft 10 in a common method step.
  • the base body 72 In its radially outer region, the base body 72 has a ground ball raceway 34, which is arranged on a tilted in the axial direction of the intermediate shaft 10 level.
  • a functional unit 20 On the main body 72, a functional unit 20 is arranged with an annular bearing seat and a bolt 40 which is connected via guided in the ball track 34 balls 38 rotatably connected to the base body 72, wherein a space of the radial bearing 16 and a space of the functional unit 20 in Overlap axial direction.
  • the bolt 40 of the functional unit 20 is displaceably mounted in a transverse bore of a pivotably mounted transverse pin 56 of a piston 14.
  • the bolt 40 of the functional unit 20 performs a reciprocating movement and drives the piston 14 in the axial direction to and fro.
  • FIG. 3 a section of an alternative drill and chisel hammer with a drive bearing 58 is shown.
  • Substantially identical components are basically numbered with the same reference numerals.
  • a base body 74 of the drive bearing 58 has on its side facing the tool holder 44 in a front region 60 radial bores 62, in which rotary driving balls 64 are mounted.
  • the rotary driving balls 64 are radially surrounded by an annular spring 66 which loads the rotary driving balls 64 radially inwardly.
  • the rotational driving balls 64 correspond during a coupling operation with recesses of a rotatably mounted on an intermediate shaft, not shown Rotary driving element, and it can be a targeted construction of a torque can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne une machine-outil, en particulier un marteau perforateur et/ou burineur. Cette machine-outil comprend un organe de percussion constitué d'un palier d'entrée (12, 58), monté rotatif sur un arbre intermédiaire (10) et par lequel un piston (14) peut être entraîné en sens axial dans un mouvement de va-et-vient. Selon cette invention, ce palier d'entrée (12) est supporté sur un palier à charge radiale (16) dans au moins un sens axial sur l'arbre intermédiaire (10).

Claims (10)

  1. Machine-outil manuelle, en particulier marteau perforateur et/ou burineur, comprenant un mécanisme de percussion, qui présente un palier d'entraînement (12, 58) monté à rotation sur un arbre intermédiaire (10), par le biais duquel un piston (14) peut être entraîné suivant un mouvement de va-et-vient dans la direction axiale, caractérisée en ce que le palier d'entraînement (12) est supporté par le biais d'un palier radial (16) dans au moins une direction axiale par le biais de l'arbre intermédiaire (10).
  2. Machine-outil manuelle selon la revendication 1, caractérisée en ce que le palier radial (16) est formé par un palier à roulement.
  3. Machine-outil manuelle selon la revendication 1 ou 2, caractérisée en ce que le palier radial (16) est disposé dans une région radialement interne (18) d'un corps de base (72, 74) du palier d'entraînement (12, 58).
  4. Machine-outil manuelle selon la revendication 3, caractérisée en ce qu'un espace de construction du palier radial (16) est superposé à un espace de construction d'une unité fonctionnelle (20) du palier d'entraînement (12, 58) dans la direction axiale.
  5. Machine-outil manuelle selon l'une quelconque des revendications 3 ou 4, caractérisée en ce que le palier radial (16) est fixé par un ajustement serré sur l'arbre intermédiaire (10).
  6. Machine-outil manuelle selon la revendication 3 ou 4, caractérisée en ce que l'arbre intermédiaire (10) fait partie du palier radial (16).
  7. Machine-outil manuelle selon l'une quelconque des revendications précédentes, caractérisée en ce que le palier d'entraînement (12, 58) fait partie du palier radial (16).
  8. Machine-outil manuelle selon l'une quelconque des revendications précédentes, caractérisée en ce que des forces axiales se produisant peuvent être transmises dans au moins une direction par le biais du palier radial (16) à au moins un composant (22) fixé sur l'arbre intermédiaire (10).
  9. Machine-outil manuelle selon l'une quelconque des revendications précédentes, caractérisée en ce que le palier radial (16) est disposé sur un côté du palier d'entraînement (12, 58) opposé à un porteoutil (44).
  10. Machine-outil manuelle selon les revendications 8 et 9, caractérisée en ce que le composant (22) fixé sur l'arbre intermédiaire (10) est formé par une roue dentée (22).
EP02729784A 2001-08-16 2002-03-14 Machine-outil, en particulier marteau perforateur et/ou burineur Expired - Lifetime EP1420921B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10140319 2001-08-16
DE10140319A DE10140319A1 (de) 2001-08-16 2001-08-16 Handwerkzeugmaschine, insbesondere Bohr- und/oder Meißelhammer
PCT/DE2002/000889 WO2003018269A1 (fr) 2001-08-16 2002-03-14 Machine-outil, en particulier marteau perforateur et/ou burineur

Publications (2)

Publication Number Publication Date
EP1420921A1 EP1420921A1 (fr) 2004-05-26
EP1420921B1 true EP1420921B1 (fr) 2009-08-05

Family

ID=7695718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02729784A Expired - Lifetime EP1420921B1 (fr) 2001-08-16 2002-03-14 Machine-outil, en particulier marteau perforateur et/ou burineur

Country Status (6)

Country Link
US (1) US20040003931A1 (fr)
EP (1) EP1420921B1 (fr)
JP (1) JP2004538171A (fr)
CN (1) CN1291819C (fr)
DE (2) DE10140319A1 (fr)
WO (1) WO2003018269A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005019196A1 (de) * 2005-04-25 2006-10-26 Hilti Ag Handwerkzeuggerät mit Taumeleinrichtung
DE102005036731A1 (de) * 2005-08-04 2007-02-08 Robert Bosch Gmbh Kupplungsvorrichtung für eine Elektrowerkzeugmaschine und Elektrowerkzeugmaschine
DE102007001494B3 (de) * 2007-01-10 2008-07-10 Aeg Electric Tools Gmbh Handgeführter Bohrhammer
DE102007010177A1 (de) * 2007-03-02 2008-09-04 Robert Bosch Gmbh Getriebevorrichtung
DE102007031561A1 (de) * 2007-07-06 2009-01-08 Robert Bosch Gmbh Handwerkzeugmaschine
CN101758486B (zh) * 2010-01-21 2011-09-28 浙江海王电器有限公司 轻型单钮多功能电锤
JP6325360B2 (ja) * 2014-06-12 2018-05-16 株式会社マキタ 打撃工具
CN113389800A (zh) * 2021-07-21 2021-09-14 浙江东立电器有限公司 一种双重复合式摆杆轴承

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3504650C2 (de) * 1985-02-12 1994-01-20 Bosch Gmbh Robert Bohrhammer mit Verstärkung der Betätigungskraft für die Kupplung des Schlagantriebes
DE3506695A1 (de) * 1985-02-26 1986-08-28 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3829683A1 (de) * 1988-09-01 1990-03-15 Black & Decker Inc Bohrhammer
DE3931329C1 (fr) * 1989-05-31 1990-06-28 Robert Bosch Gmbh, 7000 Stuttgart, De
DE4215288A1 (de) * 1991-07-08 1993-01-14 Bosch Gmbh Robert Bohrhammer
DE4231987A1 (de) * 1992-09-24 1994-03-31 Bosch Gmbh Robert Handwerkzeugmaschine, insbesondere Bohrhammer
DE19540396A1 (de) * 1995-10-30 1997-05-07 Hilti Ag Bohr- und/oder Meisselgerät
JP3450558B2 (ja) * 1995-12-25 2003-09-29 株式会社マキタ 電動工具
JP3582760B2 (ja) * 1997-04-18 2004-10-27 日立工機株式会社 ハンマドリル
DE19850369A1 (de) * 1998-11-02 2000-05-04 Schaeffler Waelzlager Ohg Taumelgetriebe für ein Schlagwerkzeug
GB0008465D0 (en) * 2000-04-07 2000-05-24 Black & Decker Inc Rotary hammer mode change mechanism
DE10106034B4 (de) * 2001-02-09 2009-11-26 Robert Bosch Gmbh Handwerkzeugmaschine

Also Published As

Publication number Publication date
CN1291819C (zh) 2006-12-27
DE50213744D1 (de) 2009-09-17
US20040003931A1 (en) 2004-01-08
DE10140319A1 (de) 2003-03-13
JP2004538171A (ja) 2004-12-24
CN1520349A (zh) 2004-08-11
WO2003018269A1 (fr) 2003-03-06
EP1420921A1 (fr) 2004-05-26

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