EP1259357B1 - Werkzeugmaschine - Google Patents

Werkzeugmaschine Download PDF

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Publication number
EP1259357B1
EP1259357B1 EP01909706A EP01909706A EP1259357B1 EP 1259357 B1 EP1259357 B1 EP 1259357B1 EP 01909706 A EP01909706 A EP 01909706A EP 01909706 A EP01909706 A EP 01909706A EP 1259357 B1 EP1259357 B1 EP 1259357B1
Authority
EP
European Patent Office
Prior art keywords
component
spring
spring element
power tool
tool according
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
EP01909706A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1259357A1 (de
Inventor
Hermann Schaible
Robert Simm
Reto Michel
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.)
Scintilla AG
Original Assignee
Scintilla 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 Scintilla AG filed Critical Scintilla AG
Publication of EP1259357A1 publication Critical patent/EP1259357A1/de
Application granted granted Critical
Publication of EP1259357B1 publication Critical patent/EP1259357B1/de
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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/65—Means to drive tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19377—Slidable keys or clutches
    • Y10T74/19414—Single clutch shaft
    • Y10T74/19419—Progressive
    • Y10T74/19442—Single key
    • Y10T74/19451—Spur gears
    • Y10T74/1946—Sliding clutch carrier
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20012—Multiple controlled elements
    • Y10T74/20018—Transmission control
    • Y10T74/20177—Particular element [e.g., shift fork, template, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20012—Multiple controlled elements
    • Y10T74/20018—Transmission control
    • Y10T74/20177—Particular element [e.g., shift fork, template, etc.]
    • Y10T74/20183—Shift fork structure

Definitions

  • the invention relates to a machine tool according to the Preamble of claim 1.
  • DE 44 41 793 A1 discloses a handheld power tool a manual transmission by an actuator is switchable.
  • the actuator is in a housing the handheld power tool rotates and has one Switching eccentric, which is in an annular gap of a switching element of the Manual transmission engages with play.
  • the switching eccentric is resiliently designed so that the actuator then also in a desired rotational position leaves when toothing of the gearbox tooth on tooth stand.
  • EP 0 437 716 A1 also discloses a handheld power tool a switching device with an actuator is switchable via at least one contact piece. In the flow of power is between the actuator and the switching piece Spring element arranged, the spring element in the power flow from the actuator in the direction of the contact piece with a first component firmly connected in two switching directions and in opposite direction of power flow with a second Component is firmly connected in both switching directions.
  • the Component is molded onto the actuating element Eccentric pin formed.
  • the spring element is only in a first through the component Switching direction elastically deformable, if this towards a free leg of the torsion spring Spring element is moved.
  • the component acts on a second leg of the spring element designed as a torsion spring, but on two points firmly clamped and therefore not or only insignificantly is elastically deformable.
  • EP 0 463 416 B1 describes a hammer drill with a manual transmission known.
  • the manual transmission has an intermediate shaft, the two firmly connected gears of different Has diameters.
  • the gears are in constant engagement with two rotatable and axially fixed on one Spindle bearing gears. Between the gears is A coupling ring on the spindle is fixed against rotation and axially displaceable stored, facing each of the gears each has a coupling toothing.
  • the clutch gears can be molded onto the gears in the axial direction Mating clutch teeth are engaged.
  • a two-part, two-legged grips on the coupling ring Shift fork engages with your first Leg axially in the direction of a tool holder behind the Coupling ring and is fixed with one with the first leg connected contact surface in one of the tool holder facing away from the axial direction via a first compression spring to a closed control cam of a shift lever pressed, which is formed by an annular groove.
  • a second Leg of the shift fork is in the axial direction of the tool holder arranged in front of the coupling ring.
  • the second Leg is axially displaceable to the first leg and is driven by a second compression spring towards the coupling ring loaded.
  • the second compression spring presses over the second Leg the coupling ring towards the tool holder the first leg.
  • the gear lever has a rotary knob protruding from a housing, the axis running perpendicular to the spindle is rotatably mounted. With the rotary knob you can use the control curve, over the shift fork and over the legs of the clutch ring be switched.
  • the coupling ring is to be facing away from the tool holder Switched direction, and the clutch teeth of the Coupling rings meet the coupling teeth of the tool holder facing gear, the control curve of the Shift lever from the contact surface of the shift fork. Come then clutch teeth of the gear over tooth gaps of the Coupling ring to lie, the coupling ring is through the first compression spring switched.
  • the invention is based on a machine tool, in particular of a hand machine tool, with a manual transmission, that of an actuating element via at least one coupling element is switchable and with at least one in the power flow between the actuating element and the coupling element arranged spring element.
  • the spring element in the power flow from Actuator in the direction of the coupling element with a first component in at least two switching directions connected and in the opposite direction of the power flow with a second component in at least the two switching directions is firmly connected.
  • the spring element can be used in both Switching directions clamped, and it can be used with a space-saving and lightweight construction, with few components, in particular with only one spring element and one piece Switching element, for example a one-piece shift fork, can be achieved in both switching directions, in particular when the machine tool is at a standstill, at least two switch positions of the manual transmission can be selected if Teeth of the coupling element on teeth of counter teeth to meet.
  • the Spring element is advantageously made in one piece, but can also basically be made in several parts.
  • the actuating element or the second component can have a Self-locking or advantageous via a locking device in be kept in the switch positions.
  • the spring element can be made in one piece on the first and / or on the second component be molded. Are the spring element and that first component and / or the second component, however, from separate ones Components formed, the spring element of its shape and especially of the material specifically for its function and resulting loads are coordinated.
  • the Spring element can be made of a plastic, especially However, the spring element is advantageously made of spring steel manufactured. A flow and fatigue of the material the spring element can even under long standing Tension can be avoided.
  • the spring element can be different, the expert be arranged as reasonable components, such as for example between the coupling element and one Shift fork and between the actuator and one of Actuator driven gear or cam etc. Particularly constructively simple and with little additional Components, however, can the spring element between a shift fork and a second driven by the actuator Component are arranged.
  • the shift fork can be made in one piece executed with the coupling element or from one to the coupling element be formed separate component, which Coupling element made of a heavy-duty material and the Shift fork made of a light, appropriate to the loads and inexpensive material can be formed. Further can be designed separately with the coupling element Shift fork a simple construction and easy assembly can be achieved.
  • the actuator is designed as a rotary knob, and further can be advantageous with a gear and a rack positive connection in both switching directions without additional Components can be easily reached in terms of design.
  • the actuator can also have one or more Control curves via the spring element on the shift fork or act on the coupling element or can also act as a slide be executed.
  • the rack and the actuator via at least one molded interlocking element are connected. Additional fastening parts can be saved and in particular the rack can advantageously the actuator and the actuator by the Rack to be attached to a housing part.
  • the spring element can be different, useful to the person skilled in the art appearing designs. With a bending rod one can particularly light, space-saving and inexpensive construction can be achieved. With a torsion spring, however, can advantageous a large deformable volume of material over turns reached, and it can easily be a with the torsion spring precisely defined spring force can be achieved. Grips the torsion spring with two legs on one component and is on the other Component on a form-locking element designed as a pin stored, components and assembly effort can be saved.
  • the solution according to the invention can be obtained from various experts as seeming sensible machine tools and due to a possible space-saving and light construction used particularly advantageously in handheld power tools such as drilling or impact drills, Rotary or chisel hammers, angle grinders, screwdrivers, Sawing, milling etc.
  • Fig. 1 shows an impact drill with one in a housing 64 stored electric motor, not shown.
  • the electric motor is via a manual transmission 10
  • Drill chuck 68 clamped in the chuck 68 Drill 62 can be driven (FIGS. 1 and 2).
  • On the chuck 68 opposite side is for generating axial
  • a ratchet mechanism 104 is arranged on the drilling spindle 66.
  • the manual transmission 10 has two juxtaposed, on the drilling spindle 66 axially fixed and rotatably mounted Idler wheels 70, 72, with not shown, on a Comb the countershaft fixed gear wheels.
  • the idler gears 70, 72 each have a coupling toothing radially to the drilling spindle 66 76, 78, via which the idler gears 70, 72 via an in a groove 74 of the drilling spindle 66 rotatably mounted and in two axial switching directions 28, 30 movable metal coupling 18 can be coupled to the drilling spindle 66.
  • the clutch 18 is radial with a clutch toothing 80 can be guided between the idler gears 70, 72 and the drilling spindle 66 and is form-fitting with the coupling teeth 80 connectable with the clutch teeth 76, 78 of the idler gears 70, 72.
  • On one of the clutch teeth 80 opposite Side of the clutch 18 is in a circumferential groove 82 Ring 112 arranged on which a one-piece shift fork 24th made of plastic with a molded groove 110 in the Switching directions 28, 30 engages positively (Fig. 2 and 3).
  • the gearbox 10 has a rotary knob Actuator 14 made of plastic to which a gear 84 is molded.
  • the gear 84 meshes in a rack 50, to which a cylindrical component 32 is integrally formed is that of the actuator 14 via the gear 84 and the rack 50 is axially displaceable in the switching directions 28, 30 is.
  • the component 32 is in the power flow from the actuator 14 to Coupling 18 via a separate spring rod Spring element 20 made of spring steel connected to the shift fork 24.
  • the spring element 20 engages in the shift fork 24 molded, form-fitting element 36.
  • To an advantageously large deformable length of the spring element 20 despite a small distance 116 between the component 32 and the shift fork 24 to achieve and a shear stress to avoid the spring element 20 is the spring element 20 in a first area facing component 32 86 of the recess in the switching directions 28, 30 movable guided.
  • the area 86 tapers into that of the component 32 facing away and opens into a bore 88 in the the spring element 20 in the switching direction 28, 30 with the Shift fork 24 is positively connected.
  • the spring element 20 engages in the component 32 with a molded, formed as a hook-shaped part form-locking element 42 in a correspondingly shaped, designed as a recess Form-locking element 44 a.
  • the spring element 20 is with its hook-shaped part in the recess in the Switching directions 28, 30 positively connected to the component 32.
  • An advantageously large deformable length of the spring element 20 despite a small distance 116 between the To reach component 32 and the shift fork 24 and one To avoid shear stress, the spring element 20 in the recess of the component 32 in a to the shift fork 24th pointing area 90 between two inclined surfaces in the Switching direction 28, 30 guided. Furthermore, it can hook-shaped part of the spring element 20 when deforming the spring element 20 partially deform and thereby leads to an advantageously large deformable spring volume.
  • the spring element 20 can be in both switching directions 28, 30 clamped, and it can in both switching directions 28, 30, in particular when the electric motor is at a standstill of clutch teeth of clutch teeth 80 of the clutch 18 and clutch teeth of clutch teeth 76 or 78 of the idler gear 70 or 72 a switching position of the Manual transmission 10 are selected.
  • Fig. 7 shows that Manual transmission 10 in a preselected position.
  • Component 32 is shifted in the switching direction 28 relative to the shift fork 24, and the spring element 20 is biased.
  • the actuator 14 by the clamping force of the spring element 20 from its preselected positions or from turns back its switch positions, this is in its Switch positions fixed by a locking pin 92, which in the switch positions in openings not shown in the Housing part 56 snaps into place.
  • the electric motor of the impact drill is switched on and there is a tooth gap in the clutch toothing 80 of the clutch 18 in the switching direction 28 over a clutch tooth Coupling teeth 76 of idler gear 70 to lie, the Coupling 18 switched by the spring element 20 and that Idler gear 70 via its clutch teeth 76 and Coupling teeth 80 of coupling 18 with drilling spindle 66 non-rotatably connected (Fig. 8). Then the drilling spindle 66 from the electric motor with a switched idler gear 70 associated translation driven.
  • the manual transmission 12 has a rotary knob Actuator 16 made of plastic to which a gear 84 is molded.
  • the gear 84 meshes in a rack 50, to which a component 34 is formed in one piece and that of Actuator 16 via the gear 84 and the rack 50 is axially displaceable in the switching directions 28, 30.
  • the component 34 is in the power flow from the actuator 16 to a clutch, not shown, via a torsion spring formed spring element 22 made of spring steel with a Shift fork 26 connected.
  • the actuating element 16 is on a housing part, not shown, via a locking ring 96 attached to a recess 98 of the actuator 16 engages (Fig. 10).
  • the actuator 16 is sealed off from the housing part by a sealing ring 106.
  • the shift fork 26 is not on the housing part holding elements shown held in an H-profile 100 of the component 34 engage.
  • the spring element 22 is formed with a, as a spiral Form-fitting element 46 formed on a pin Form-locking element 48 of component 34 is mounted. Furthermore, the spring element 22 engages with a first leg 58 form-fitting on a molded on the shift fork 26, formed as a projection form-locking element 38 in the Switching direction 28 and with a second leg 60 positively on a molded onto the shift fork 26 as Projection formed form-locking element 40 in the Switching direction 30 on.
  • One leg 60 of the spring element 22 is in the axial direction of the actuator 16 before and a leg 58 is after the shift fork 26 arranged (Fig. 11).
  • the gear 84 is arranged between the rack 50 and the shift fork 26, whereby the spring element despite a small overall volume 22 advantageously carried out with long legs 58, 60 and a large deformable spring volume can be achieved.
  • the spring element 22 can be in both switching directions 28, 30 clamped, and it can accordingly in both switching directions 28, 30 the embodiment in Figs. 1 to 8 a Switch position can be selected.
  • a web 114 is formed on the component 34, which in axial direction of the pin between the legs 58, 60 of the Spring element 22 protrudes.
  • the spring element 22 can be advantageous can be easily mounted preloaded. The bridge 114 avoids crossing the legs 58, 60.
  • a bolt 102 is formed, which in a not shown, extending over about 180 ° Groove is guided in the housing part and in the switch positions on Strikes the end of the groove and the actuator 16 in its Limited rotation.
  • the switch positions it is Actuator 16 fixed via a locking pin 92, the is shiftable when switching against a compression spring 108 (Fig. 10).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Drilling And Boring (AREA)
EP01909706A 2000-02-19 2001-01-30 Werkzeugmaschine Expired - Lifetime EP1259357B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10007665A DE10007665A1 (de) 2000-02-19 2000-02-19 Werkzeugmaschine
DE10007665 2000-02-19
PCT/EP2001/000956 WO2001060570A1 (de) 2000-02-19 2001-01-30 Werkzeugmaschine

Publications (2)

Publication Number Publication Date
EP1259357A1 EP1259357A1 (de) 2002-11-27
EP1259357B1 true EP1259357B1 (de) 2003-09-03

Family

ID=7631583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01909706A Expired - Lifetime EP1259357B1 (de) 2000-02-19 2001-01-30 Werkzeugmaschine

Country Status (6)

Country Link
US (1) US6942435B2 (zh)
EP (1) EP1259357B1 (zh)
JP (1) JP4933713B2 (zh)
CN (1) CN100406207C (zh)
DE (2) DE10007665A1 (zh)
WO (1) WO2001060570A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009028622A1 (de) 2009-08-18 2011-02-24 Robert Bosch Gmbh Handwerkzeugmaschinenschalteinheit

Families Citing this family (12)

* Cited by examiner, † Cited by third party
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DE102004018084B3 (de) * 2004-04-08 2005-11-17 Hilti Ag Hammerbohrgerät
JP2006029511A (ja) * 2004-07-20 2006-02-02 Aisin Ai Co Ltd 車両用変速操作装置
DE102004042734A1 (de) * 2004-09-03 2006-03-09 Robert Bosch Gmbh Schaltvorrichtung mit einer Synchronisationsfeder
DE102008042960B4 (de) * 2008-10-20 2018-06-07 Zf Friedrichshafen Ag Anordnung zum Betätigen zumindest einer Schaltgabel in einem Getriebe
CA2768248A1 (en) * 2009-07-17 2011-01-20 Demain Technology Pty Ltd. Power tool
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
DE102010009338A1 (de) * 2010-02-25 2011-08-25 WABCO GmbH, 30453 Getriebesteller
US9630307B2 (en) 2012-08-22 2017-04-25 Milwaukee Electric Tool Corporation Rotary hammer
CN102837296A (zh) * 2012-10-02 2012-12-26 浙江奔宇工具有限公司 电锤的拨档装置
CN108543990B (zh) * 2018-04-08 2019-09-27 泰州市晨虹数控设备制造有限公司 一种转速可调的钻机
DE102018108621A1 (de) * 2018-04-11 2019-10-17 Alfing Keßler Sondermaschinen GmbH Schraubvorrichtung und Schraubverfahren
GB2596315A (en) * 2020-06-24 2021-12-29 Black & Decker Inc Power tool

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DE2438783B2 (de) * 1974-08-13 1977-09-08 Kress-Elektrik Gmbh + Co, Elektromotorenfabrik, 7457 Bisingen Vorrichtung zur getriebeumschaltung eines motorisch angetriebenen handwerkzeugs
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009028622A1 (de) 2009-08-18 2011-02-24 Robert Bosch Gmbh Handwerkzeugmaschinenschalteinheit
WO2011020644A1 (de) 2009-08-18 2011-02-24 Robert Bosch Gmbh Handwerkzeugmaschinenschalteinheit
RU2550462C2 (ru) * 2009-08-18 2015-05-10 Роберт Бош Гмбх Переключатель ручной машины

Also Published As

Publication number Publication date
JP2003523835A (ja) 2003-08-12
JP4933713B2 (ja) 2012-05-16
CN1404431A (zh) 2003-03-19
US20030079562A1 (en) 2003-05-01
WO2001060570A1 (de) 2001-08-23
EP1259357A1 (de) 2002-11-27
US6942435B2 (en) 2005-09-13
CN100406207C (zh) 2008-07-30
DE10007665A1 (de) 2001-09-06
DE50100576D1 (de) 2003-10-09

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