EP1941973A2 - Visseuse - Google Patents

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Publication number
EP1941973A2
EP1941973A2 EP07021436A EP07021436A EP1941973A2 EP 1941973 A2 EP1941973 A2 EP 1941973A2 EP 07021436 A EP07021436 A EP 07021436A EP 07021436 A EP07021436 A EP 07021436A EP 1941973 A2 EP1941973 A2 EP 1941973A2
Authority
EP
European Patent Office
Prior art keywords
output shaft
switching device
screwdriver
gear
axial direction
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.)
Granted
Application number
EP07021436A
Other languages
German (de)
English (en)
Other versions
EP1941973B1 (fr
EP1941973B2 (fr
EP1941973A3 (fr
Inventor
Bernd Fleischmann
Thomas Dürr
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.)
Festool GmbH
Original Assignee
Protool 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
Family has litigation
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Application filed by Protool GmbH filed Critical Protool GmbH
Publication of EP1941973A2 publication Critical patent/EP1941973A2/fr
Publication of EP1941973A3 publication Critical patent/EP1941973A3/fr
Publication of EP1941973B1 publication Critical patent/EP1941973B1/fr
Application granted granted Critical
Publication of EP1941973B2 publication Critical patent/EP1941973B2/fr
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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
    • B25B23/0064—Means for adjusting screwing depth
    • 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
    • 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

Definitions

  • the invention relates to a screwdriver for screwing screws into workpieces, with an output shaft driven by an electric drive motor, with a device front facing, coaxial to the output shaft tool holder for a rotary tool on the output shaft or a rotationally fixed to the output shaft, in particular detachably connected tool carrier is arranged, wherein the output shaft is movably mounted in the axial direction between a front, inactive position and a rear, active position and acted upon by a spring force to its front position, and with a depth stop for limiting the screwing.
  • Such screwdrivers are already known (for example DE 20 20006 006 273 U1 ).
  • the dog clutch is disengaged in the initial state of the screwdriver due to the force acting on the output shaft spring force, so that the output shaft and with it the rotary tool occupy their front, inactive position in which the drive of the output shaft is interrupted.
  • To screw the screwdriver is then pressed over the screw against the workpiece, so that the output shaft against the spring force moves backwards to its rear, active position, in the claw clutch is engaged, so that the output shaft is driven and the screw is thus screwed.
  • the screwdriver supports itself via the depth stop on the workpiece so that the output shaft is relieved and the dog clutch can disengage again.
  • Such screwdrivers with a depth stop are mainly used for Serienverschrauben when a plurality of screws to be screwed in succession in a workpiece. They are commonly referred to as drywall screwdrivers.
  • the drive motor remains in operation by turning on the screwdriver by the user until it is turned off by the user.
  • the user regularly turns off the screwdriver only after screwing in the last screw. This ongoing running of the engine not only promotes wear, but causes a correspondingly long-lasting noise and brings a correspondingly large energy consumption with it.
  • the present invention is therefore an object of the invention to provide a screwdriver of the type mentioned, which is less susceptible to wear and causes as little noise. In addition, the energy consumption is to be lowered.
  • the screwdriving device has a switching device for switching on and off the energization of the drive motor, by a the movement of the output shaft mitsesde actuating section is switchable, wherein the switching device is in the front position of the output shaft in its the energization of the drive motor preventing the off state and in the rear position of the output shaft in its the energizing of the drive motor allowing on-state.
  • the output shaft can remain permanently mechanically connected to the drive.
  • the drive motor is energized only when the screwing starts, so overcome by the pressure on the output shaft, the spring force and therefore the motion-tight connected to the output shaft operating part pushed backwards and thus the switching device is automatically transferred to its on state.
  • the actuating part moves away from the switching device, so that the drive motor is switched off automatically. In this way, the drive motor runs only during the respective screwing, so no unnecessary engine run times occur.
  • the switching device is expediently a non-contact switching device, expediently a Hall sensor, which is associated with a permanent magnet on the actuating part.
  • the output shaft is driven by a gear transmission from the side, wherein the gear transmission includes a driven wheel seated on the output shaft and the output shaft, the output gear in the axial direction between its front, inactive position and its rear, active position passes through movable. In this way, the rear end of the Output shaft free, so that they or the associated actuating part can operate the switching device.
  • the output shaft and the output gear abut each other via an inclined surface arrangement, so that the movement of the output shaft in the axial direction is superimposed a rotational movement of the output shaft relative to the output gear and in operation from the output gear to the output shaft in addition to driving the output shaft Torque is applied in an axial direction forward axial force.
  • the resulting from the drawing screwdriver 1 is used for screwing screws into workpieces. It is designed as a hand-held device and has a base section 2, which forms a pistol-like handle 3, on the front side of which a user to be actuated by pressing the actuator 4 of an electrical main switch is arranged. Above the handle 3, an upper portion 5 of the base portion 2 extends forward to a device head 6, which in the Figures 3 and 4 is shown separately. At the bottom of the device head 6, an electric drive motor 7 (only in FIG. 5 schematically indicated) containing motor region 8 of the base section 2 at.
  • the screwdriver 1 is a cordless device.
  • the battery pack supplying power to the drive motor 7 is accommodated in a battery housing 9 detachably fastened to the base section 2 at the bottom.
  • the power supply could be done by connecting the device by means of an electrical supply cable to the mains power instead of batteries.
  • the switching on and off of the drive motor 7 is controlled by the screwing, that is, the drive motor 7 is automatically set at the beginning of the screwing in motion and turned off automatically after screwing the respective screw. This is achieved in the manner described below.
  • the device head 6 includes a drivable by the drive motor 7 forth output shaft 10 to which a tool carrier 11 is connected, which extends coaxially to the output shaft 10 to the front side 12 of the screwdriver 1 out and there has a frontal tool holder for a rotary tool 13, which is interchangeable in the tool holder inserted screwdriver bit is formed.
  • the rotary tool 13 has a polygonal shaft 14 which is inserted into the correspondingly multi-edged tool holder of the tool carrier 11.
  • the tool carrier 11 extends in the axial extension of the output shaft 10 and is detachably connected to the output shaft 10 so that it can be replaced if necessary. In the connected state, the tool carrier 11 is seated firmly on the output shaft 10 both in the axial direction and in the circumferential direction.
  • the output shaft 10 is rotatable both at two axially spaced rotary and sliding bearings 15, 16 and in the axial direction between a front, inactive position ( FIG. 3 ) and a rear, active position ( FIG. 4 ) movably mounted.
  • the axial movement is limited by fixedly arranged end stops, which are formed in the illustrated embodiment of the rotary and sliding bearings 16 and of a next to the other rotary and sliding bearings 15 arranged bearing ring 19.
  • Each end stop 17, 18 is associated with a radial shoulder on the output shaft 10. It is understood that the end stops can be formed in other ways than shown.
  • the output shaft 10 is urged by a spring force in the direction of its front position.
  • This spring force can be fixed by a one in the device head 6 and the other end on the output shaft 10 supporting coil spring 20 are applied.
  • the output shaft 10 is driven via a gear transmission from the side.
  • the gear transmission includes a seated on the output shaft 10 output gear 21, wherein the output shaft 10, the output gear 21 passes through and thereby between its front, inactive position and its rear, active position is movable.
  • the output gear 21 is arranged axially fixed. It is arranged between the front rotating and sliding bearing 16 and the bearing ring 19.
  • the gear transmission is a bevel gear.
  • the drive is effected by means of a drive shaft 22 with pinion 23, which extends transversely to the output shaft 10 and is driven by the drive motor 7 ago.
  • the drive shaft 22 carries a first bevel gear 24 which meshes with the output gear 21 forming the second bevel gear of the gear transmission.
  • the output shaft 10 and the output gear 21 abut one another via an inclined surface arrangement 27, so that when the output shaft 10 is moved in the axial direction of this axial movement, a rotational movement of the output shaft 10 is superimposed relative to the output gear 21.
  • the inclined surface arrangement 27 is in the illustrated embodiment of several - in principle would suffice - distributed over the circumference, spirally inclined to the axial direction extending inclined surfaces 25 on the inner circumference of the driven wheel 21 and of the inclined surfaces 25 of the driven wheel 21 associated, corresponding spirally inclined inclined surfaces 26th formed on the outer circumference of the output shaft 10.
  • inclined surface arrangement 27 can also be realized differently. So you could, for example provide on the output shaft at least one projecting guide pin in the radial direction, which engages in a spirally inclined guide groove on the inner circumference of the driven wheel and is guided in this.
  • the screwdriver 1 further has on its front side 12 a depth stop 28 which limits the screwing depth when screwing in a screw and abuts the workpiece when reaching the desired screwing depth.
  • the depth stop 28 is formed by a stop sleeve 29 which surrounds the rotary tool 13 and which comes with its end face for abutment against the workpiece.
  • the depth stop 28 is adjustable in the usual way in the axial direction. For this purpose, it can be seated in the usual way on an adjusting sleeve 30, which can be screwed back and forth in the axial direction (threaded connection 31) on a fixed housing part 32 of the device head 6.
  • the depth stop could also be designed differently than illustrated and be formed, for example, by a screw magazine containing a plurality of screws, which are successively conveyed to the turning tool 13.
  • screw magazines are known, so that a more detailed description is unnecessary.
  • the output shaft 10 is, as described, movable in the axial direction between its front, inactive position and its rear, active position. This movement is used to turn on and off the drive motor 7.
  • the screwdriver 1 has a switching device 33 for switching on and off the energization of the drive motor 7, wherein the switching device 33 by a movement of the output shaft 10 mitinesde actuating section 34 is switchable.
  • the switching device 33 is in the front position of the output shaft 10 in its the energizing of the drive motor 7 preventing the off state and in the rear position of the output shaft 10 in its the energizing of the drive motor 7 permitting ON state.
  • the switching device 33 of the output shaft 10 is upstream in the axial direction to the rear. She is fixed.
  • the actuating part 34 is arranged on the rear end face 35 of the freely ending output shaft 10 or, depending on the type of switching device 33, formed by the end face 35 itself.
  • the switching device 33 expediently operates without contact. It can therefore be a proximity sensor in the form of a Hall sensor. Other possibilities would be, for example, a reed sensor, an optical sensor or a magnetostrictive sensor. Depending on the type of sensor, the associated actuating part 34 is formed by a permanent magnet 36.
  • the switching device 33 could in principle also be formed by a contact switch.
  • the working method is as follows:
  • FIG. 3 shows the starting position.
  • the output shaft 10 is located by the force of the coil spring 20 in its front, inactive position, in which the actuating portion 34 is arranged at a distance from the switching device 33, so that an energization of the drive motor is prevented.
  • This off state of the drive shaft 10 is applied to the screwdriver tool 13 to be screwed on and sets the screw on the workpiece or you bring the screwdriver tool 13 into engagement with the screw head of the previously positioned on the workpiece screw.
  • the screw not shown, extends in the illustration according to the Figures 3 and 4 in the axial direction of the output shaft 10.
  • the workpiece, also not shown, is found in the Figures 3 and 4 right in front of the device in the axial direction of the output shaft 10 rectangular position.
  • the depth stop 28 comes to rest against the workpiece. This reduces the From the workpiece via the screw on the output shaft 10 pressure exerted so that the output shaft 10 is relieved from the workpiece.
  • the force exerted by the coil spring 20 and especially by the drive wheel 21 to the output shaft 10 forward axial force then moves the output shaft 10 with simultaneous rotation of the output shaft 10 (inclined surface 27) forward, so that the actuating part 34 away from the switching device 33.
  • the screw is screwed a short distance into the workpiece, so that the screw head is sunk. If the actuating part 34 has reached the response distance to the switching device 33, the switching device 33 reaches its switch-off state, so that the drive motor 7 is no longer energized. It then comes out again FIG. 3 resulting situation.
  • the wiring of the switching device 33 and the required for switching on and off the energization of the drive motor 7 circuit is conventional and can be performed by a person skilled in the art without further notice.
  • the screwdriver 1 may conveniently be operated either in one of two modes:
  • the first operating mode is the single mode (standard operation). In this mode, the operator operates on the actuator 4, the main switch so that the screwdriver is turned on so far. The screwdriver is, so to speak, in a ready state. The energization of the drive motor 7 then depends on the axial position of the output shaft 10, that is, whether you press the screwdriver against the screw and the workpiece or screwing is completed.
  • This readiness state of the screwdriver lasts as long as the user actuates the main switch.
  • a preselection switch 37 in the case shown a rotary switch, available. In the pre-selection position "single operation", the operator must operate the actuator 4 of the main switch. If the preselection switch 37 is adjusted to the "continuous operation” position, the continuous electrical standby state is obtained via an associated control device 38.
  • the block diagram according to FIG. 5 shows the electrical or electronic control device 38, via which the compared to the control device 38 undersized drive motor 7 can be energized by the voltage source 39 forth.
  • Both the actuated by the actuator 4 main switch 40 and the symbolically drawn switching device 33 are connected to the control device 38 as well as the selector switch 37.
  • the main switch 40 In the operating mode "continuous operation", the main switch 40 is bridged, as it were, so that the state of the switching device 33 is decisive for the energization of the drive motor 7.
  • a further switch for changing the direction of rotation of the output shaft 10 may also be provided.
  • the tool carrier 11 is fixedly connected to the output shaft 10 both in the axial direction and in the direction of rotation. This is a detachable connection, so that the tool holder 11 can be replaced if necessary.
  • the output shaft 10 has a plug-in recess 42 projecting from its front end face 41 with a polygonal cross-section over at least part of its length.
  • the tool carrier 11 forms a plug-in shaft 43 with a corresponding polygonal cross-section, so that the inserted into the plug-in recess 42 insertion shaft 43 is rotatably connected to the output shaft 10.
  • a circumferential locking groove 44 is further formed, which are associated with one or more distributed over the circumference locking body in the form of locking balls 45.
  • the locking balls 45 are arranged in the plug-in recess 42 containing region of the output shaft 10 and each mounted in a radial direction from the outer periphery of the output shaft 10 to the plug recess 42 through radial recess 46 movable in the radial direction.
  • the detent balls 45 is associated with a displaceable on the outer circumference of the output shaft 10 in the axial direction locking sleeve 47, which holds the locking balls 45 inwardly into the locking groove 44 in its illustrated locking position.
  • the already described coil spring 20 is supported on the locking sleeve 47 and acts on the locking sleeve 47 and the locking balls 45, the output shaft 10 forward.
  • the locking sleeve 47 has a front and radially outwardly rising contact surface 48, via which the locking sleeve 47 on the locking balls 45th is applied so that they are pressed inward and the tool carrier 11 is locked to the output shaft 10.
  • the rear flank of the locking groove 44 then pushes the locking balls 45 outwards, which moves the locking sleeve 47 against the spring force via the inclined contact surface 48, so that the tool carrier is released.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP07021436.6A 2007-01-03 2007-11-03 Visseuse Active EP1941973B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007001061.5A DE102007001061B4 (de) 2007-01-03 2007-01-03 Schraubgerät

Publications (4)

Publication Number Publication Date
EP1941973A2 true EP1941973A2 (fr) 2008-07-09
EP1941973A3 EP1941973A3 (fr) 2009-08-05
EP1941973B1 EP1941973B1 (fr) 2011-11-30
EP1941973B2 EP1941973B2 (fr) 2016-01-20

Family

ID=39226769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07021436.6A Active EP1941973B2 (fr) 2007-01-03 2007-11-03 Visseuse

Country Status (2)

Country Link
EP (1) EP1941973B2 (fr)
DE (1) DE102007001061B4 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2457693A2 (fr) 2010-11-26 2012-05-30 C. & E. Fein GmbH Visseuse dotée d'un arrêt commandé par capteur
WO2013000670A1 (fr) * 2011-06-30 2013-01-03 Robert Bosch Gmbh Tournevis pour construction à paroi sèche
EP2444202A3 (fr) * 2010-01-07 2018-03-14 Black & Decker Inc. Ensemble de contact amovible
CN114473410A (zh) * 2022-01-17 2022-05-13 王秀梅 一种方形壳体四角螺栓锁定装配装置及其使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010009917A1 (de) * 2010-03-02 2011-09-08 Protool Gmbh Schraubvorsatz und damit ausgestattetes Schraubgerät
DE102013100986A1 (de) 2013-01-31 2014-07-31 C. & E. Fein Gmbh Schrauber mit elektronischer Tiefenabschaltung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1142933A (fr) 1955-02-09 1957-09-24 Brevets Wagner Soc D Machine-outil électrique portative
US6655473B1 (en) 2002-12-31 2003-12-02 Ying Fang Chi Hand tool with an adjustable rotational speed and torsion force
US20040040727A1 (en) 2002-09-03 2004-03-04 Microtorq, L.L.C. Tranducerized torque wrench

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019895C2 (de) * 1990-06-22 1999-04-08 Ceka Elektrowerkzeuge Ag & Co Verfahren und Vorrichtung zur Steuerung des Betriebs von Elektrohandgeräten
JP2721768B2 (ja) * 1992-03-12 1998-03-04 リョービ株式会社 バッテリー式スクリュードライバー
US5398946A (en) † 1993-12-29 1995-03-21 Poly-Tech Industries Chuck having one-step lock and release
DE202006006273U1 (de) * 2006-04-19 2006-06-14 Festool Gmbh Schraubgerät

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1142933A (fr) 1955-02-09 1957-09-24 Brevets Wagner Soc D Machine-outil électrique portative
US20040040727A1 (en) 2002-09-03 2004-03-04 Microtorq, L.L.C. Tranducerized torque wrench
US6655473B1 (en) 2002-12-31 2003-12-02 Ying Fang Chi Hand tool with an adjustable rotational speed and torsion force

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2444202A3 (fr) * 2010-01-07 2018-03-14 Black & Decker Inc. Ensemble de contact amovible
EP2444201A3 (fr) * 2010-01-07 2018-03-14 Black & Decker Inc. Ensemble de contact amovible
EP2457693A2 (fr) 2010-11-26 2012-05-30 C. & E. Fein GmbH Visseuse dotée d'un arrêt commandé par capteur
DE102010053314A1 (de) 2010-11-26 2012-05-31 C. & E. Fein Gmbh Schrauber mit sensorgesteuerter Abschaltung
EP2457693A3 (fr) * 2010-11-26 2016-09-21 C. & E. Fein GmbH Visseuse dotée d'un arrêt commandé par capteur
WO2013000670A1 (fr) * 2011-06-30 2013-01-03 Robert Bosch Gmbh Tournevis pour construction à paroi sèche
CN103635292A (zh) * 2011-06-30 2014-03-12 罗伯特·博世有限公司 干墙起子机
CN103635292B (zh) * 2011-06-30 2016-08-17 罗伯特·博世有限公司 干墙起子机
EP3895846A1 (fr) * 2011-06-30 2021-10-20 Robert Bosch GmbH Tournevis de construction à sec
CN114473410A (zh) * 2022-01-17 2022-05-13 王秀梅 一种方形壳体四角螺栓锁定装配装置及其使用方法

Also Published As

Publication number Publication date
DE102007001061B4 (de) 2017-07-27
DE102007001061A1 (de) 2008-07-10
EP1941973B1 (fr) 2011-11-30
EP1941973B2 (fr) 2016-01-20
EP1941973A3 (fr) 2009-08-05

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