EP0990489B1 - Tournevis motorisé - Google Patents

Tournevis motorisé Download PDF

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Publication number
EP0990489B1
EP0990489B1 EP99115725A EP99115725A EP0990489B1 EP 0990489 B1 EP0990489 B1 EP 0990489B1 EP 99115725 A EP99115725 A EP 99115725A EP 99115725 A EP99115725 A EP 99115725A EP 0990489 B1 EP0990489 B1 EP 0990489B1
Authority
EP
European Patent Office
Prior art keywords
elements
screwdriver
clutch
entrainment
drive shaft
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
EP99115725A
Other languages
German (de)
English (en)
Other versions
EP0990489A2 (fr
EP0990489A3 (fr
Inventor
Ewald Hald
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.)
C&E Fein GmbH and Co
Original Assignee
C&E Fein GmbH and Co
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 C&E Fein GmbH and Co filed Critical C&E Fein GmbH and Co
Publication of EP0990489A2 publication Critical patent/EP0990489A2/fr
Publication of EP0990489A3 publication Critical patent/EP0990489A3/fr
Application granted granted Critical
Publication of EP0990489B1 publication Critical patent/EP0990489B1/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
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/141—Mechanical overload release couplings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose

Definitions

  • the invention is therefore based on the object of an improved Specify screwdriver, with a simple means Torque-dependent clutch deactivated can be so that a rigid drive is achieved.
  • this object is achieved in a screwdriver of the type mentioned in that first entrainment elements are provided on the drive wheel, with second driving elements on the cam wheel for positive power transmission cooperate, and that the actuator is an axial Adjustment of the tool drive shaft such that in a first position, the first and second driver elements are positively engaged with each other, and that in one second position the driver elements are disengaged while the coupling elements are in engagement with one another.
  • the coupling elements and the entrainment elements on the facing Arranged sides of the drive wheel are provided.
  • Coupling elements disengaged in the first position.
  • the coupling elements designed as cam elements with oblique flanks.
  • the entrainment elements as claw elements with straight, to the axis of rotation axially parallel flanks.
  • the driving elements are of a particularly simple construction guaranteed.
  • At least two, preferably three first coupling elements in uniform Angular distances from each other arranged on the drive wheel, and at least two, preferably three first entrainment elements at equal angular intervals to each other on the drive wheel arranged, which are each arranged and shaped accordingly second coupling elements and driving elements on the cam ring are assigned, with the first and second entrainment elements each extend over a central angle, which is larger than the central angle over which the Extend coupling elements.
  • first and second coupling elements preferably constructed so that they are seen in the axial direction have a greater height than the height of the first and second driving elements.
  • the coupling elements concentric on one with the entrainment elements arranged outwardly offset circle preferably each a coupling element following a driving element in a radial direction externally offset position is assigned.
  • the actuating device comprises an adjusting sleeve, which is in the housing via a thread Is guided axially adjustable, with the adjusting sleeve a locking ring is axially displaceable and secured against rotation is fixed, which is rotatable relative to the housing and locked in different angular positions is.
  • the triggering torque can be adjusted the torque-dependent triggering clutch in simple Achieve this and combine it with an appropriate adjustment, to ensure the rigid through drive.
  • a thrust bearing provided to support the drive wheel, which has a compliant Element, preferably supported on the housing via an O-ring is.
  • This measure has the advantage that a possibly at Transition between the first and second positions of the tool drive shaft tendency especially when starting for jamming due to the flexible bearing of the drive wheel is avoided and at the same time some damping for the case is reached that an adjustment during operation of the collar. In this way there are signs of wear by adjusting the adjusting ring during operation significantly reduced.
  • a screwdriver according to the invention is overall with the Number 10 denotes.
  • the screwdriver 10 comprises a housing 11 in which an electric motor (not shown) is received, which via a gear 51st a meshing drive wheel 40 drives. Other parts of the gear thus formed are not shown.
  • the drive wheel 40 is freely rotatably mounted on a tool drive shaft 30, at its first end 37 by means of a radial bearing 58 is mounted in the housing 11 and 38 at its second end Holder 26 for a tool 24, e.g. a screwdriver bit having.
  • a cam ring 45 is fixed on the tool drive shaft 30, which is positively connected to it. Between the Cam ring 45 and the drive wheel 40 is a total with the Number 50 designated trigger clutch formed.
  • This release clutch 50 has first coupling elements 41 on one of the cam rings 45 facing side of the drive wheel 40, the second Coupling elements 46 on a drive wheel 40 facing Side of the cam ring 45 are assigned.
  • a spring element 43 arranged in the form of a spiral compression spring, through which the cam ring 45 and thus also the tool drive shaft 30, which together with the cam ring 45 axially is slidably arranged in an outward direction, that is towards the receptacle 26, is acted upon.
  • the torque from the drive wheel 40 can thus be closed Release clutch 50 from the drive wheel 40 via the cam ring 45 are transferred to the tool drive shaft 30 in order to Drive tool 24.
  • the coupling elements 41 and 46 on the drive wheel 40 and on the cam ring 45 are cam elements with flat, sloping flanks formed, the shape of which is still based on FIGS. 2 and 3 is explained in more detail.
  • the cam ring 45 lies on a tool-side shoulder 53 of the Tool drive shaft 30 and is on the side of the drive wheel 40 secured by a locking ring 48.
  • the cam ring 45 has a Central recess 49 on two opposite one another Pages with flats 44 is provided with corresponding Flattenings on the tool drive shaft 30 a Form fit.
  • an actuating device designated overall by the number 20 can the tool drive shaft 30 together with the Cam ring 45 axially adjusted in the direction of the drive wheel 40 so the overlap between the oblique Flanks of the coupling elements 41, 46 to change.
  • the actuating device 20 for adjusting the tool drive shaft 30 towards the drive wheel 40 comprises a Tool drive shaft 30 surrounding adjusting sleeve 13, the the housing 11 connected axially adjustable via a thread 12 is.
  • a sleeve 16 pressed on On an outer area of the adjusting sleeve 13 is a sleeve 16 pressed on, which thus rotatably with the adjusting sleeve 13 and is axially immovably connected.
  • an externally encompassable locking ring 14 is provided which on the Sleeve 16 is axially displaceable.
  • the locking ring 14 is between an axial guide 17 in the form of a spline the sleeve 16 and the locking ring 14 axially displaceable, however guided against rotation on the sleeve 16.
  • the Locking ring 14 by a coil spring 18 which is between a paragraph 21 of the sleeve 16 and a shoulder 22 of the locking ring 14 in a cavity is enclosed, towards the drive wheel 40 biased.
  • the locking ring has at the housing end 14 a plurality of locking cams that only with the number 15 are indicated in the corresponding locking cams engage the housing 11.
  • the locking ring 14 can thus against the tension of the coil spring 18 are pulled outwards together with the tool drive shaft 30 are rotated and then in a different angular position be locked.
  • the actuating device 20 thus permits axial adjustment the tool drive shaft 30 and fuse in different, given axial positions.
  • the tool drive shaft 30 is by means of a fixed bearing 34 stored, which is enclosed between discs 33 and 35 and by means of a locking ring 36 on the adjusting sleeve 13 is installed.
  • a puncture is provided on the adjusting sleeve 13, so that between the tool drive shaft 30 and the Adjusting sleeve 13, a cavity 55 is formed, the tool side through a shoulder 31 and on the housing side through the disk 33 is limited.
  • a locking ring 32 set on the tool drive shaft 30.
  • the axial Adjustment range of the tool drive shaft 30 in the direction of the drive wheel 40 is thus by the stop of the locking ring 32 limited to the disc 33.
  • In the opposite Direction is the axial adjustment range of the tool drive shaft 30 limited by a locking ring 39 which on the Adjusting sleeve 13 is fixed and on the housing side on a paragraph 57 strikes.
  • the tool drive shaft is in the position shown in FIG. 1 in the maximum outward position, caused by the stop of the adjusting ring 39 on the shoulder 57 of the housing 11 is limited.
  • the result is a minimal one Covering the flanks of the first and second coupling elements 41, 46 on the drive wheel 40 and on the cam ring 45 and thus a minimum triggering torque of the trigger clutch 50.
  • first driving elements 42 and on the cam ring 45 second driving elements 47 are provided, which are in the form and size are coordinated.
  • take-away elements 42 and 47 are claws with straight, parallel flanks.
  • the cam ring 45 is in supervision and shown enlarged in section along the line III-III.
  • the drive wheel 40 on which the corresponding first coupling elements 41 and first driving elements 42 are provided, since these are complementary to the second coupling elements 46 and second driving elements 47 are formed on the cam ring 45.
  • This configuration enables the tool drive shaft 30 by means of the actuating device 20 in one area Set so that only the coupling elements 41 and 46 with the sloping flanks are effective when the screwdriver is in Is taken into operation and the tool drive shaft 30 through Muscle strength with their tool 24 against the action of the spring element 43 is pressed so that the coupling elements 41, 46 engage.
  • the drive wheel 40 is via an axial bearing 52 and one behind it arranged bushing 56 with an elastic in between Element 54 in the form of an O-ring supported on the housing side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Mechanical Operated Clutches (AREA)

Claims (11)

  1. Visseuse dynamométrique, comprenant :
    un carter (11),
    un arbre d'entraínement de l'outil (30) logé dans le carter (11) de manière à pouvoir tourner et susceptible de coulisser dans le sens axial, dont une première extrémité est logée dans le carter (11) et dont la deuxième extrémité comporte un logement (26) destiné à recevoir un outil (24),
    une roue motrice (40) montée sur l'arbre d'entraínement de l'outil (30) de manière à pouvoir tourner et actionnée par un moteur, laquelle est bloquée du côté du carter pour empêcher un mouvement axial,
    une bague à came (45), qui est fixée dans le sens axial sur l'arbre d'entraínement de l'outil (30) et qui est bloquée pour empêcher un déplacement axial vers l'extérieur,
    un élément à ressort (43), destiné à pré-contraindre l'arbre d'entraínement de l'outil (30) vers l'extérieur en direction du logement,
    des premiers éléments de couplage (41) sur la roue motrice (40),
    des deuxièmes éléments de couplage (46) sur la bague à came (45), qui coopèrent avec les premiers éléments de couplage (41), afin de former un couplage de déclenchement (50) en fonction du couple de rotation, et
    une unité de réglage (20) destinée à déplacer axialement l'arbre d'entraínement de l'outil (30),
       caractérisée en ce que
    des premiers éléments d'entraínement (42) sont prévus sur la roue motrice (40), qui coopèrent avec des deuxièmes éléments d'entraínement (47) sur la bague à came (45) pour une transmission de la force par conjugaison de forme, et en ce que
    l'unité de réglage (20) permet de déplacer axialement l'arbre d'entraínement de l'outil (30), de telle sorte que dans une première position les premiers et les deuxièmes éléments d'entraínement (42, 47) entrent en prise par conjugaison de forme les uns avec les autres et que dans une deuxième position, les éléments d'entraínement (42, 47) ne sont plus en prise, alors que les éléments de couplage (41, 46) sont en prise les uns avec les autres.
  2. Visseuse selon la revendication 1, caractérisée en ce que les éléments de couplage (41, 46) et les éléments d'entraínement (42, 47) sont disposés respectivement sur les côtés de la roue motrice (40) orientés vers eux.
  3. Visseuse selon la revendication 1 ou 2, caractérisée en ce que les éléments de couplage (41, 46) ne sont pas en prise dans la première position.
  4. Visseuse selon la revendication 1, 2 ou 3, caractérisée en ce que les élémehts de couplage (41, 46) sont conçus sous forme d'ergots à flancs obliques (60).
  5. Visseuse selon une des revendications précédentes, caractérisée en ce que les éléments d'entraínement (42, 47) sont conçus sous forme de pinces avec des flancs (62) droits, parallèles à l'axe de rotation (19).
  6. Visseuse selon une des revendications 3 à 5, caractérisée en ce qu'au moins deux, de préférence trois premiers éléments de couplage (41) sont disposés à même distance angulaire les uns des autres sur la roue motrice (40), en ce qu'au moins deux, de préférence trois premiers éléments d'entraínement (42) sont disposés à même distance angulaire les uns des autres sur la roue motrice (40), auxquels sont associés respectivement des deuxièmes éléments de couplage (46) et deuxièmes éléments d'entraínement (47), disposés et formés sur la bague à came (45), et en ce que les premiers et les deuxièmes éléments d'entraínement (42, 47) s'étendent chacun sur un angle au centre (β) supérieur à l'angle au centre (α) sur lequel s'étendent les éléments de couplage (41, 46).
  7. Visseuse selon la revendication 6, caractérisée en ce que les premiers et les deuxièmes éléments de couplage (41, 46) ont, par référence au sens axial, une hauteur (h1) supérieure à la hauteur (h2) des premiers et deuxièmes éléments d'entraínement (42, 47).
  8. Visseuse selon la revendication 6 ou 7, caractérisée en ce que les éléments de couplage (41, 46) sont disposés sur un cercle concentriquement décalé vers l'extérieur par rapport aux éléments d'entraínement (42, 47).
  9. Visseuse selon la revendication 6, 7 ou 8, caractérisée en ce qu'à chaque élément de couplage (41, 46) est associé un élément d'entraínement (42, 47) dans une position décalée vers l'extérieur dans le sens radial.
  10. Visseuse selon une des revendications précédentes, caractérisée en ce que l'unité de réglage (20) comprend une douille de réglage (13) qui est guidée sur le carter (11) de manière réglable dans le sens axial par l'intermédiaire d'un filetage (12), et en ce qu'une bague de blocage (14) est fixée contre la douille de réglage (13) de manière à pouvoir se déplacer dans le sens axial et de manière à ne pas pouvoir tourner par rapport à celle-ci, elle est fixée de manière à pouvoir tourner par rapport au carter (11) et de manière à être bloquée dans différentes positions angulaires.
  11. Visseuse selon une des revendications précédentes, caractérisée en ce qu'il est prévu un palier axial (52) destiné à former un appui pour la roue motrice (40), lequel palier est en appui contre le carter (11) par l'intermédiaire d'un élément flexible (54), de préférence par l'intermédiaire d'un joint torique.
EP99115725A 1998-09-30 1999-08-10 Tournevis motorisé Expired - Lifetime EP0990489B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19845024A DE19845024C2 (de) 1998-09-30 1998-09-30 Kraftgetriebener Schrauber
DE19845024 1998-09-30

Publications (3)

Publication Number Publication Date
EP0990489A2 EP0990489A2 (fr) 2000-04-05
EP0990489A3 EP0990489A3 (fr) 2000-05-10
EP0990489B1 true EP0990489B1 (fr) 2002-04-03

Family

ID=7882917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99115725A Expired - Lifetime EP0990489B1 (fr) 1998-09-30 1999-08-10 Tournevis motorisé

Country Status (6)

Country Link
US (1) US6173792B1 (fr)
EP (1) EP0990489B1 (fr)
JP (1) JP3451040B2 (fr)
AT (1) ATE215426T1 (fr)
DE (2) DE19845024C2 (fr)
ES (1) ES2175881T3 (fr)

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DE10348517B4 (de) * 2003-10-18 2010-03-18 Hilti Aktiengesellschaft Schraubgerät
GB2414701A (en) * 2004-06-05 2005-12-07 Black & Decker Inc Rotary spindle for a power tool
DE102004038829A1 (de) * 2004-08-04 2006-03-16 C. & E. Fein Gmbh Schrauber
JP4327061B2 (ja) * 2004-10-21 2009-09-09 株式会社マキタ 締付け工具
JP4359716B2 (ja) 2004-10-21 2009-11-04 株式会社マキタ 締付け工具
JP4564835B2 (ja) * 2004-12-02 2010-10-20 株式会社マキタ 回転工具
US7314097B2 (en) * 2005-02-24 2008-01-01 Black & Decker Inc. Hammer drill with a mode changeover mechanism
US7469753B2 (en) 2005-06-01 2008-12-30 Milwaukee Electric Tool Corporation Power tool, drive assembly, and method of operating the same
JP2007050454A (ja) * 2005-08-12 2007-03-01 Hitachi Koki Co Ltd インパクト工具
US7980324B2 (en) * 2006-02-03 2011-07-19 Black & Decker Inc. Housing and gearbox for drill or driver
GB0819282D0 (en) * 2008-10-21 2008-11-26 Specialised Petroleum Serv Ltd Downhole tool with high pressure operating capability
JP5456555B2 (ja) * 2010-04-23 2014-04-02 株式会社マキタ 電動工具
JP5512441B2 (ja) * 2010-07-22 2014-06-04 株式会社マキタ ねじ締め工具
US9956676B2 (en) 2013-01-09 2018-05-01 Techtronic Power Tools Technology Limited Tool with rotatable head
WO2017097951A1 (fr) * 2015-12-11 2017-06-15 Atlas Copco Industrial Technique Ab Boulonneuse mécanique à entraînement angulaire

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Also Published As

Publication number Publication date
DE19845024A1 (de) 2000-04-13
JP3451040B2 (ja) 2003-09-29
EP0990489A2 (fr) 2000-04-05
ATE215426T1 (de) 2002-04-15
DE59901103D1 (de) 2002-05-08
ES2175881T3 (es) 2002-11-16
JP2000108045A (ja) 2000-04-18
DE19845024C2 (de) 2000-08-03
EP0990489A3 (fr) 2000-05-10
US6173792B1 (en) 2001-01-16

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