EP1940592B1 - Machine-outil portative presentant un arbre et un palier de commande de montee loge sur ledit arbre - Google Patents

Machine-outil portative presentant un arbre et un palier de commande de montee loge sur ledit arbre Download PDF

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Publication number
EP1940592B1
EP1940592B1 EP06793052A EP06793052A EP1940592B1 EP 1940592 B1 EP1940592 B1 EP 1940592B1 EP 06793052 A EP06793052 A EP 06793052A EP 06793052 A EP06793052 A EP 06793052A EP 1940592 B1 EP1940592 B1 EP 1940592B1
Authority
EP
European Patent Office
Prior art keywords
shaft
switching
power tool
portable power
drive 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.)
Not-in-force
Application number
EP06793052A
Other languages
German (de)
English (en)
Other versions
EP1940592A1 (fr
Inventor
Dietmar Saur
Helmut Heinzelmann
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 EP1940592A1 publication Critical patent/EP1940592A1/fr
Application granted granted Critical
Publication of EP1940592B1 publication Critical patent/EP1940592B1/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
    • 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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • 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
    • B25D2211/006—Parallel drill and motor spindles
    • 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
    • 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 hand tool with a shaft and with a shaft mounted on the Hubantriebslager according to the preamble of claim 1.
  • a power tool is from the DE-A-37 32 288 known.
  • a hand tool in particular a hammer drill, known with a shaft and with a mounted on the shaft Hubantriebslager for translating a rotational movement of the shaft in a lifting movement.
  • a Hubantriebslager and the shaft comprehensive gear of the power tool is switchable.
  • a rotary drive of a tool chuck and a percussion drive of a striking mechanism can be switched on and off.
  • the shaft can be moved into several switching configurations. In a first shift configuration, there is a non-rotatable impact drive connection between the shaft and the lift bearing so that the percussion drive is turned on. In a second switching configuration, the impact drive connection is broken so that the percussion mechanism is deactivated. Further switching configurations relate to switching the rotary drive on and off and a Variolock function.
  • the invention relates to a hand tool, in particular a hammer drill, with the features of claim 1.
  • the hand tool comprises a holding means which fixes the Hubantriebslager in the first switching configuration. This can avoid that the Hubantriebslager generated despite the interrupted impact drive connection due to a friction of the storage of Hubantriebslagers on the shaft a lifting movement. By avoiding the unwanted strokes, a hand tool can be achieved with improved smoothness, since the lifting movements no interference affecting the ease of use of the power tool vibrations can be generated.
  • the solution according to the invention can be advantageously used in particular in rotary hammers, but in principle would also be an application in other hand tool machines with a switched on and off lift drive or percussion drive conceivable.
  • the term "fixing” in this context refers to a reference system of a housing of the power tool.
  • the shaft on which the Hubantriebslager is mounted is a stocky intermediate shaft in most generic hand tool machines. In principle, however, the Hubantriebslager could also on a drive or motor shaft be stored.
  • Particularly advantageous solution according to the invention for fixing or braking of trained as a swash bearing Hubantriebslagern is used. In principle, however, a use in connection with eccentric bearings or groove bearings would be conceivable.
  • the holding means is arranged on a switching piece for axial displacement of the shaft.
  • a fast rotating Hubantriebslager can be braked when establishing the connection by a friction on Hubantriebslager when the contact piece has an at least frictional rotational connection with the Hubantriebslager in the first switching configuration.
  • the frictional engagement can be supplemented by a form fit after braking the Hubantriebslagers or alone fix the Hubantriebslager.
  • the hand tool comprises a friction lining for producing a frictional rotary connection between the lifting drive bearing and the holding means.
  • the friction lining can be formed particularly effective and inexpensive by a rubber ring.
  • a secure hold for fixing the Hubantriebslagers can be achieved when the Hubantriebslager on one edge has a locking profile.
  • an "edge” should be an end region in an axial direction.
  • the positive-locking element can be arranged either on Hubantriebslager or on the contact piece and is advantageously supplemented by a corresponding form-fitting element on the other component.
  • the interlocking element advantageously has a multiple point symmetry, for example, a hexagonal or octagonal symmetry, so that a compound in several rotational positions can be produced.
  • a switching movement of the switching piece can be used for fixing the Hubantriebslagers when the positive-locking element is provided to intervene in a switching movement direction of the switching piece in a corresponding form-locking element.
  • a comfortable dissolution of a tooth-on-tooth position of the holding means can be achieved if the hand tool comprises a synchronization means for synchronizing the Hubantriebslagers with the holding means.
  • the synchronization means may be formed, for example, as a synchronization spring or as a synchronization ring.
  • the impact drive connection is provided for driving a pneumatic impact mechanism, unwanted lifting movements can occur the percussion in the off state can be avoided and smooth running of the power tool can be particularly sustainable improved. Furthermore, an additional noise can be avoided by an unintentional, relatively easy impact of the racket on the firing pin.
  • FIG. 1 shows a trained as a hammer drill 10a hand tool with a shaft 12a shown only schematically here, as an intermediate shaft, a drive shaft 30a (FIG. FIG. 2 ) with a mounted on the shaft 12a, designed as a swash bearing Hubantriebslager 14a and with a rotary drive of a tool chuck 60a connects.
  • the shaft 12a can be axially displaced via a switching knob 40a mounted on a housing 38a and a switching piece 18a.
  • an eccentric pin engages in a leg spring 42a (FIG. FIGS. 3 to 4 ) of the contactor 18a.
  • the shaft 12a is displaced maximally in one working direction 44a.
  • a toothing 46a of the shaft 12a is then not engaged with a corresponding toothing 48a of an intermediate sleeve 36a, so that a rotary drive connection between the drive shaft 30a and the shaft 12a is interrupted.
  • An impact drive connection between the drive shaft 30a and the Hubantriebslager 14a is generated by the engagement of an external toothing 50a of the axially movable against the force of a spring intermediate sleeve 36a in a corresponding internal toothing 52a of the Hubantriebslagers 14a. Therefore, in the first shift configuration, only one striking mechanism 34a, but not turned on the rotary drive of the hammer drill 10a, so that the hammer drill 10a can be operated in a bit mode.
  • the shaft 12a In a middle switching configuration, the shaft 12a is in a central position, which in FIG. 2 is shown.
  • the toothing 46a of the shaft 12a is then engaged with the corresponding toothing 48a of the intermediate sleeve 36a so that the rotary drive connection is between the drive shaft 30a and the shaft 12a.
  • the impact drive connection between the drive shaft 30a and the Hubantriebslager 14a continues to exist. Therefore, in the middle shift configuration, both the percussion mechanism 34a and the rotary drive of the hammer drill 10a are turned on, so that the hammer drill 10a can be operated in a percussion drilling mode.
  • the intermediate sleeve 36a generates in the middle shift configuration a rotationally fixed impact drive connection between the shaft 12a and the Hubantriebslager 14a.
  • the shaft 12a is displaced maximally against the working direction 44a.
  • the shaft 12a and the intermediate sleeve 36a With the shaft 12a and the intermediate sleeve 36a is axially displaced against the force of the spring counter to the working direction 44a, so that the toothing 46a of the shaft 12a is then engaged with the corresponding toothing 48a of the intermediate sleeve 36a. Therefore, the rotary drive connection exists between the drive shaft 30a and the shaft 12a.
  • the impact drive connection between the drive shaft 30a and the Hubantriebslager 14a is interrupted because by the displacement of the intermediate sleeve 36a no engagement of the outer teeth 50a with the corresponding internal teeth 52a of the Hubantriebslagers 14a is more. Therefore, in the second switching configuration, only the rotary drive of the hammer drill 10a is turned on, so that the hammer drill 10a can be operated in a rotary drilling mode.
  • the Hubantriebslager 14 a comprises a penetrated by the shaft 12 a drive bearing 54 a with an annular groove whose axis of symmetry is inclined relative to a rotation axis.
  • a ring with a lever extension 58a is mounted on balls, which performs due to the inclination of the axis of symmetry relative to the axis of rotation in a rotation of the drive bearing 54a alternating pivotal movements.
  • the lever extension 58a engages in a not explicitly shown piston of the percussion mechanism 34a of the hammer drill 10a.
  • the impact drive connection is therefore provided for driving a pneumatic percussion mechanism 34a.
  • the switching piece 18a is axially fixed and rotatably connected to the shaft 12a for displacing the shaft 12a.
  • an octagonal catch profile 22a is formed, which forms a positive locking element 24a.
  • the positive-locking element 24a is provided to engage against a switching movement direction 28a in a corresponding form-fitting element 24a 'or holding means 16a on the contact piece 18a.
  • the holding means 16a is for fixing the lift drive bearing 14a in the second shift configuration in which the impact drive connection between the lift drive bearing 14a and the drive shaft 30a is interrupted.
  • the holding means 16a comprises, in addition to a latching profile 22a ', a synchronization means 32a which can be deflected in an axial direction or in the working direction 44a and is designed as a spring arm for synchronizing the lifting drive bearing 14a with the holding means 16a (FIG. FIG. 5 ).
  • a radially inwardly projecting cam 56a is formed. If the cam 56a comes into abutment with a corner of the latching profile 22a when shifting the switching piece 18a during a switching movement from the middle switching configuration into the second switching configuration, the synchronization means 32a is deflected counter to the switching movement direction 28a.
  • a radius of the locking profile 22a is smaller than a radius of the position of the cam 56a in the middle of its edge, so that after a short rotation of the drive bearing 54a, the synchronization means 32a snaps over the edge of the locking profile 22a and through the cam 56a a positive connection between the Hubantriebslager 14a and the contactor 18a generates ( FIG. 4 ).
  • FIGS. 7 and 8 show a further embodiment of the invention.
  • the description is essentially limited to differences to that in the Figures 1-6 illustrated embodiment, with respect to which remains the same Characteristics is referenced. Analogous features are provided with the same reference numerals, wherein the letters "a” and "b" are added to distinguish the exemplary embodiments.
  • holding means 16b is formed as a flat friction surface, which forms a Hubantriebslager 14b facing end side of the contact piece 18b.
  • a drive bearing 54b of Hubantriebslagers 14b designed as a pressed rubber ring friction lining 20b is arranged, which comes in the second switching configuration with the holding means 16b to the plant.
  • the switching piece 18b therefore has a frictional rotational connection with the lifting drive bearing 14b in the second switching configuration. If the operating mode of a hammer drill 10b comprising the contact piece 18b is switched over during the operation of the hammer drill 10b, then the holding means 16b brakes the rotating lifting drive bearing 14b as soon as the friction lining 20b comes into contact with the holding means 16b.
  • a synchronization means and a form-locking element can in the in FIGS. 7 and 8 illustrated embodiment of the invention advantageously eliminated.
  • a contact pressure of the holding means 16b on the friction lining 20b is so great that a frictional force of the frictional engagement overcompensates a moment generated by a bearing friction.

Claims (8)

  1. Machine-outil portative, en particulier marteau perforateur (10a ; 10b), comprenant un arbre (12a ; 12b) et un palier d'entraînement de levage (14a ; 14b) monté sur l'arbre (12a ; 12b) pour convertir un mouvement de rotation en un mouvement de levage, une connexion d'entraînement de percussion entre l'arbre (12a ; 12b) et le palier d'entraînement de levage (14a ; 14b) existant dans au moins une première configuration de commutation et la connexion d'entraînement de percussion étant interrompue dans au moins une deuxième configuration de commutation, le palier d'entraînement de levage (14a ; 14b) étant fixé par un moyen de retenue (16a ; 16b) dans la deuxième configuration de commutation, caractérisée en ce que le moyen de retenue (16a ; 16b) est disposé sur une pièce de commutation (18a ; 18b) pour le déplacement axial de l'arbre (12a ; 12b).
  2. Machine-outil portative selon la revendication 1, caractérisée en ce que la pièce de commutation (18a ; 18b) présente, dans la deuxième configuration de commutation, une connexion rotative au moins par engagement par friction avec le palier d'entraînement de levage (14a ; 14b).
  3. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée par une garniture de friction (20b) pour établir une connexion rotative par engagement par friction entre le palier d'entraînement de levage (14b) et le moyen de retenue (16b).
  4. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée par un profilé d'encliquetage (22a) sur un bord du palier d'entraînement de levage (14a).
  5. Machine-outil portative selon l'une quelconque des revendications 1 et 2, caractérisée par un élément d'engagement par correspondance géométrique (24a) pour la connexion par engagement par correspondance géométrique du palier d'entraînement de levage (14a) à la pièce de commutation (18a) dans une direction périphérique (26a) par rapport à l'arbre (12a).
  6. Machine-outil portative selon la revendication 5, caractérisée en ce que l'élément d'engagement par correspondance géométrique (24a) est prévu pour venir en prise dans une direction de déplacement de commutation (28a) de la pièce de commutation (18a) dans un élément d'engagement par correspondance géométrique correspondant (24a').
  7. Machine-outil portative selon l'une quelconque des revendications 4 à 6, caractérisée par un moyen de synchronisation (32a) pour synchroniser le palier d'entraînement de levage (14a) avec le moyen de retenue (16a).
  8. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que la connexion d'entraînement de percussion est prévue pour entraîner un outil à percussion pneumatique (34a).
EP06793052A 2005-10-05 2006-08-29 Machine-outil portative presentant un arbre et un palier de commande de montee loge sur ledit arbre Not-in-force EP1940592B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005047600A DE102005047600A1 (de) 2005-10-05 2005-10-05 Handwerkzeugmaschine mit einer Welle und mit einem auf der Welle gelagerten Hubantriebslager
PCT/EP2006/065767 WO2007039359A1 (fr) 2005-10-05 2006-08-29 Machine-outil portative presentant un arbre et un palier de commande de montee loge sur ledit arbre

Publications (2)

Publication Number Publication Date
EP1940592A1 EP1940592A1 (fr) 2008-07-09
EP1940592B1 true EP1940592B1 (fr) 2011-03-23

Family

ID=37479303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06793052A Not-in-force EP1940592B1 (fr) 2005-10-05 2006-08-29 Machine-outil portative presentant un arbre et un palier de commande de montee loge sur ledit arbre

Country Status (6)

Country Link
US (1) US7635032B2 (fr)
EP (1) EP1940592B1 (fr)
CN (1) CN101282820B (fr)
AT (1) ATE502731T1 (fr)
DE (2) DE102005047600A1 (fr)
WO (1) WO2007039359A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007050307A1 (de) 2007-10-22 2009-04-23 Robert Bosch Gmbh Handwerkzeugmaschine
US8188098B2 (en) * 2008-05-19 2012-05-29 Hoffmann-La Roche Inc. GPR119 receptor agonists
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
DE102010062094A1 (de) * 2010-11-29 2012-05-31 Robert Bosch Gmbh Hammerschlagwerk
US9308636B2 (en) 2012-02-03 2016-04-12 Milwaukee Electric Tool Corporation Rotary hammer with vibration dampening
US10328560B2 (en) * 2015-02-23 2019-06-25 Brian Romagnoli Multi-mode drive mechanisms and tools incorporating the same
WO2022062983A1 (fr) * 2020-09-25 2022-03-31 南京泉峰科技有限公司 Marteau électrique
JP2022188996A (ja) * 2021-06-10 2022-12-22 株式会社マキタ 回転打撃工具

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3039669A1 (de) * 1980-10-21 1982-05-27 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3503507A1 (de) * 1985-02-02 1986-08-07 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3732288C2 (de) 1987-09-25 1993-10-14 Atlas Copco Elektrowerkzeuge Elektropneumatischer Drehschlagbohrhammer mit einer Vorrichtung zum Stillsetzen des Schlagwerkes
DE3819125A1 (de) 1988-06-04 1989-12-14 Bosch Gmbh Robert Bohrhammer
DE3931329C1 (fr) * 1989-05-31 1990-06-28 Robert Bosch Gmbh, 7000 Stuttgart, De
JP3582760B2 (ja) 1997-04-18 2004-10-27 日立工機株式会社 ハンマドリル
JP3688943B2 (ja) 1999-08-26 2005-08-31 株式会社マキタ ハンマードリル
GB0008465D0 (en) * 2000-04-07 2000-05-24 Black & Decker Inc Rotary hammer mode change mechanism
GB0214772D0 (en) * 2002-06-26 2002-08-07 Black & Decker Inc Hammer
JP3976187B2 (ja) 2002-11-20 2007-09-12 株式会社マキタ ハンマードリル
DE10312980B4 (de) * 2003-03-24 2018-05-03 Robert Bosch Gmbh Bohrhammer oder Schlagbohrmaschine
GB0311045D0 (en) * 2003-05-14 2003-06-18 Black & Decker Inc Rotary hammer
DE102004058686A1 (de) * 2004-09-03 2006-03-09 Robert Bosch Gmbh Elektrowerkzeug mit einem zwischen den Betriebsarten Bohren, Schlagbohren, Meißeln umschaltbaren Antrieb
DE102004045117A1 (de) * 2004-09-17 2006-03-23 Robert Bosch Gmbh Schaltvorrichtung
DE102004057686A1 (de) * 2004-11-30 2006-06-01 Robert Bosch Gmbh Schaltvorrichtung

Also Published As

Publication number Publication date
EP1940592A1 (fr) 2008-07-09
US20080011499A1 (en) 2008-01-17
US7635032B2 (en) 2009-12-22
DE102005047600A1 (de) 2007-04-12
WO2007039359A1 (fr) 2007-04-12
CN101282820B (zh) 2010-09-29
ATE502731T1 (de) 2011-04-15
DE502006009172D1 (de) 2011-05-05
CN101282820A (zh) 2008-10-08

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