EP2011608B1 - Outil manuel doté d'un dispositif d'accouplement à patinage - Google Patents

Outil manuel doté d'un dispositif d'accouplement à patinage Download PDF

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Publication number
EP2011608B1
EP2011608B1 EP08104006.5A EP08104006A EP2011608B1 EP 2011608 B1 EP2011608 B1 EP 2011608B1 EP 08104006 A EP08104006 A EP 08104006A EP 2011608 B1 EP2011608 B1 EP 2011608B1
Authority
EP
European Patent Office
Prior art keywords
drive
hand tool
output
output spindle
drive means
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
EP08104006.5A
Other languages
German (de)
English (en)
Other versions
EP2011608A1 (fr
Inventor
Kevin Guo
Jens Neumann
Markus Hartmann
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP2011608A1 publication Critical patent/EP2011608A1/fr
Application granted granted Critical
Publication of EP2011608B1 publication Critical patent/EP2011608B1/fr
Active legal-status Critical Current
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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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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
    • B25D16/003—Clutches specially adapted therefor
    • 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
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • 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
    • B25D2250/165—Overload clutches, torque limiters
    • 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
    • B25D2250/321—Use of balls

Definitions

  • the invention relates to a hand tool with the features according to the preamble of claim 1, such a hand tool is from the DE 102004047470 known.
  • the hand tool device has a drive means and an output spindle extending along a rotation axis, which can be driven rotationally via the drive means.
  • a slip clutch is provided which has a plurality of coupling body.
  • the coupling bodies are in each case both with a group of correspondingly many drive-side receptacles as well as with a group of correspondingly many output-side receptacles in engagement or can be brought into engagement therewith.
  • the engagement of the coupling body can be repealed either with the group of drive-side receptacles or with the group of driven-side receptacles against a spring force generated by spring means.
  • a maximum value for a torque to be transmitted can thus be fixed or adjustable.
  • the coupling body come with one of the groups of recordings out of engagement, whereby the rotationally fixed coupling between the drive means and the output means is interrupted and the output spindle is thus not further driven. In this way, damage to be created on a screw or the hand tool itself can be avoided.
  • an adjustable spring means which presses against a spring plate, in which a plurality of recesses are embedded, in which engage a plurality of spherical coupling body.
  • the coupling body are mounted in correspondingly dimensioned holes of a positioning and at the same time are on their side facing away from the spring plate side with drive-side recesses into engagement, which are embedded in a merely rotatably mounted drive gear.
  • a disadvantage of the known coupling is that it requires a relatively high number of components which, on the one hand, increases the production costs and the assembly effort and, on the other hand, increases the risk of malfunction.
  • US 2005/0263306 A1 shows a Kochrastkupplung, are arranged in the detent balls within a drive gear.
  • the present invention has for its object to avoid the disadvantages mentioned in a hand tool and to provide a cost-manufacturable and stable slip clutch.
  • this object is achieved by a hand tool with the features of claim 1, wherein the output side receptacles are formed by recessed into the output spindle and with respect to the axis of rotation in the radial direction open recesses.
  • the drive means is formed by a drive gearwheel which extends around the output spindle and into which the drive-side receptacles are embedded.
  • the drive torque from the drive gear is transmitted directly to the coupling body and from this directly to the output spindle.
  • the number of components required for transmitting the torque is reduced to a minimum, whereby at the same time a game occurring in the direction of rotation between the drive gear and the output shaft and a resulting wear can be minimized.
  • a drive gear on the output spindle is slidably held in the axial direction, wherein the drive-side receptacles are embedded in a first end side and facing away from the first end side second end side is acted upon by the spring force.
  • the drive gear itself acts as a movable coupling part which moves out of engagement with the Kupplungskörpem on reaching the predetermined maximum value of the transmitted torque against the spring force of the spring means.
  • the coupling body act simultaneously as an end stop against which the drive gear is biased by the spring means. The formation of an additional movable coupling part or an additional end stop can thus be dispensed with, which considerably simplifies the construction of the slip clutch and reduces its production costs.
  • the drive-side receptacles are limited in the radial direction by a covering formed on the drive means, which extends to the first end side in the axial direction beyond the drive-side receptacles addition.
  • the clutch bodies can be kept in permanent engagement with the output spindle solely by the drive gear.
  • the said overlap ensures that the coupling bodies remain in engagement with the driven-side receptacles of the output spindle even when the drive gear comes out of engagement with the coupling bodies.
  • the coupling body are formed by balls and the receptacles by appropriately rounded recesses.
  • commercial balls can be used as a coupling body and the receptacles are incorporated in a particularly simple manner in the drive gear and the output spindle, which further reduces the manufacturing cost.
  • the drive means advantageously forms a direct stop of the spring means, whereby the risk of malfunction is reduced, for example, as a result of tilting.
  • Fig. 1 shows a front part of a hand tool 2 in the form of a hammer drill. This has in a housing 4 to a drive motor 6, which drives via a countershaft 8, a striking mechanism 10 and a rotatable about a rotation axis A drive means 12 in the form of a drive gear.
  • the drive means 12 is rotationally coupled via a generally designated 14 slip clutch with a substantially cylindrical output shaft 16 which extends centrally through a center bore 20 of the drive means 12 therethrough, wherein the drive means 12 is held axially displaceably on the output spindle 16.
  • the output spindle 16 in turn is rotatably connected to a tool holder 18 to which a tool 22, such as a hammer drill, can be fixed.
  • the slip clutch 14 for example, a plurality of spherical coupling body 24 and in each case a corresponding number of drive-side receptacles 26 on the drive means 12 and output side receptacles 28 on the output spindle 16.
  • the drive-side receptacles 26 are formed by rounded, that is by at least partially cylindrical or spherical recesses, which are recessed at the center bore 20 in the drive means and with respect to the axis of rotation A both in the radial direction to the output spindle 16 and in the axial direction to a first Front side 30 of the drive means 12 are opened.
  • the output-side receptacles 28 are formed by spherical recesses, which are embedded in a cylindrical surface 32 of the output spindle 16 and thereby opened with respect to the axis of rotation A only in the radial direction.
  • slip clutch 14 for example, formed by a coil spring spring means 34 and a support ring 36 which can be applied to a formed on the output spindle 16 circumferential shoulder 38.
  • the coupling body 24 protrude into the output-side receptacles 28, wherein they rest on their side remote from the output spindle 16 side of a cover 40, which extends to the first end face 30 of the drive means 12 out.
  • the drive means 12 is acted upon directly by the spring means 34 with a spring force F, which is supported on its side facing away from the drive means 12 via the support ring 36 on the shoulder 38 of the output spindle 16.
  • the drive means 12 If, during operation, the transmitted torque increases as a result of a correspondingly large resistance on the tool 22 and thereby reaches a predetermined maximum value, the drive means 12 is moved against the spring force F of the coupling bodies 24 away until the engagement between these and the drive-side receptacles 26 is repealed and consequently the drive means 12 can rotate relative to the output spindle 16
  • the cover 40 extends in the axial direction so far that the coupling body 24 are held securely in the disengaged side receptacles 28 even in this disengaged state of the drive means 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Portable Power Tools In General (AREA)

Claims (4)

  1. Outil à main (2) comportant des moyens d'entraînement (12) et une broche entraînée (16) s'étendant le long d'un axe de rotation (A), entre lesquels est agencé un accouplement à friction (14) comportant plusieurs corps d'accouplement (22) qui peuvent respectivement s'engager dans un groupe de logements côté entraînement (26) et un groupe de logements côté entraîné (28),
    dans lequel le corps d'accouplement (24) peut être désengagé de l'un des groupes de logements (26 ; 28) contre une force élastique (F) générée par des moyens de ressort (34),
    dans lequel les logements côté entraîné (28) sont formés par des évidements agencés dans la broche entraînée (16) et débouchant dans une direction radiale par rapport à l'axe de rotation (A),
    dans lequel les moyens d'entraînement (12) sont formés par une roue dentée d'entraînement s'étendant autour de la broche entraînée (16), laquelle roue dentée d'entraînement est maintenue de manière mobile sur la broche entraîné (16),
    caractérisé en ce que les logements côté entraînement (26) sont formés sur une première face avant (30) de la roue dentée d'entraînement et une seconde face avant (42) de la roue dentée d'entraînement, opposée à la première face avant (30), est soumise à la force élastique (F).
  2. Outil à main selon la revendication 1, caractérisé en ce que les logements côté entraînement (26) sont délimités, dans la direction radiale, par une surface chevauchante (40) formée sur les moyens d'entraînement (12), laquelle surface chevauchante s'étend dans une direction axiale vers la première face avant (30) au-dessus des logements côté entraînement (26).
  3. Outil à main selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que les corps d'accouplement (24) sont formés par des billes et les logements (26, 28) sont formés par des évidements arrondis.
  4. Outil à main selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les moyens d'entraînement (12) forment une butée directe des moyens de ressort (34).
EP08104006.5A 2007-07-04 2008-05-19 Outil manuel doté d'un dispositif d'accouplement à patinage Active EP2011608B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007000365A DE102007000365A1 (de) 2007-07-04 2007-07-04 Handwerkzeuggerät mit Rutschkupplung

Publications (2)

Publication Number Publication Date
EP2011608A1 EP2011608A1 (fr) 2009-01-07
EP2011608B1 true EP2011608B1 (fr) 2013-04-17

Family

ID=39769065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08104006.5A Active EP2011608B1 (fr) 2007-07-04 2008-05-19 Outil manuel doté d'un dispositif d'accouplement à patinage

Country Status (5)

Country Link
US (1) US20090008115A1 (fr)
EP (1) EP2011608B1 (fr)
JP (1) JP2009012173A (fr)
CN (1) CN101337348A (fr)
DE (1) DE102007000365A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2960021A1 (fr) 2014-06-27 2015-12-30 HILTI Aktiengesellschaft Machine-outil portative et procédé de commande
US10149433B2 (en) * 2015-07-10 2018-12-11 Combined Manufacturing Inc. Combination blade and cord weed cutter-trimmer head device
DE102016220001A1 (de) * 2015-10-15 2017-04-20 Robert Bosch Gmbh Handwerkzeugmaschine
JP2022119301A (ja) * 2021-02-04 2022-08-17 株式会社マキタ 打撃工具

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342880C2 (de) 1983-11-26 1987-02-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Einstellbare Drehmomentenbegrenzung für Elektrowerkzeuge
DE3504650C2 (de) * 1985-02-12 1994-01-20 Bosch Gmbh Robert Bohrhammer mit Verstärkung der Betätigungskraft für die Kupplung des Schlagantriebes
DE3540964A1 (de) * 1985-11-19 1987-05-21 Bosch Gmbh Robert Motorisch angetriebenes handwerkzeug fuer bohrenden oder schlagbohrenden betrieb
DE4005133A1 (de) * 1990-02-17 1991-08-22 Licentia Gmbh Handgefuehrte elektrowerkzeugmaschine
DE4215288A1 (de) * 1991-07-08 1993-01-14 Bosch Gmbh Robert Bohrhammer
DE19507097A1 (de) * 1993-09-02 1996-09-05 Atlas Copco Tools Ab Pneumatischer Motorschraubenschlüssel
US5588496A (en) * 1994-07-14 1996-12-31 Milwaukee Electric Tool Corporation Slip clutch arrangement for power tool
DE102004025951A1 (de) 2004-05-27 2005-12-22 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Schlaghammer
DE102004047470A1 (de) 2004-09-30 2006-04-06 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Bohr- und/oder Schlaghammer

Also Published As

Publication number Publication date
DE102007000365A1 (de) 2009-01-08
CN101337348A (zh) 2009-01-07
US20090008115A1 (en) 2009-01-08
EP2011608A1 (fr) 2009-01-07
JP2009012173A (ja) 2009-01-22

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