EP1259357A1 - Machine-outil - Google Patents

Machine-outil

Info

Publication number
EP1259357A1
EP1259357A1 EP01909706A EP01909706A EP1259357A1 EP 1259357 A1 EP1259357 A1 EP 1259357A1 EP 01909706 A EP01909706 A EP 01909706A EP 01909706 A EP01909706 A EP 01909706A EP 1259357 A1 EP1259357 A1 EP 1259357A1
Authority
EP
European Patent Office
Prior art keywords
component
machine tool
spring
tool according
spring element
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
EP01909706A
Other languages
German (de)
English (en)
Other versions
EP1259357B1 (fr
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/fr
Application granted granted Critical
Publication of EP1259357B1 publication Critical patent/EP1259357B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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.
  • a hammer drill with a manual transmission is known from EP 0 463 416 B1.
  • the gearbox has an intermediate shaft that has two gearwheels of different diameters firmly connected to it.
  • the gears are in constant engagement with two gears rotatably and axially fixed on a spindle.
  • a coupling ring is mounted on the spindle in a rotationally fixed and axially displaceable manner between the gearwheels and has a coupling toothing facing each of the gearwheels.
  • the clutch gears can be brought into engagement with mating clutch gears formed on the gears in the axial direction.
  • a two-part, two-leg shift fork engages the clutch ring.
  • the shift fork engages with your first
  • Leg of the shift fork is arranged in the axial direction of the tool holder in front of the clutch ring.
  • the second leg is axially displaceable relative to the first leg and is loaded by a second compression spring in the direction of the coupling ring.
  • the second compression spring presses the coupling ring in the direction of the tool holder on the first leg via the second leg.
  • the shift lever has a rotary knob protruding from a housing, which is driveably supported around an axis running perpendicular to the spindle. With the rotary knob, the clutch ring can be shifted via the control cam, the shift fork and its leg.
  • the second leg of the shift fork is moved against the second compression spring. If the clutch teeth of the gear wheel come to rest on the teeth of the clutch ring, for example when the hammer drill is actuated, the clutch ring is switched by the second compression spring.
  • the control curve of the shift lever stands out from the contact surface of the shift fork. If the clutch teeth of the gear wheel come to rest on the teeth of the clutch ring, the clutch ring is switched by the first compression spring.
  • the invention is based on a machine tool, in particular a handheld power tool, with a manual transmission that can be switched by a actuating element via at least one coupling element and with at least one spring element arranged in the power flow between the actuating element and the coupling element.
  • the spring element in the force flow from the actuating element in the direction of the coupling element with a first component in at least two switching directions and in the opposite direction of the force flow with a second component m at least the two switching directions is firmly connected.
  • the spring element can be tensioned in both switching directions, and it can have a space-saving and light construction, with few components, in particular with only one spring element and one piece
  • Switching element for example a one-piece shift fork
  • Switching element can be achieved that in both switching directions, especially when the machine tool is at a standstill, at least two shift positions of the manual transmission can be preselected when teeth of the coupling element meet teeth of a counter-toothing. Then come tooth gaps of the counter toothing
  • the preselected switching position is switched by the spring element above the teeth of the coupling element for lying, for example when the machine tool is switched on.
  • the spring element is advantageously made in one piece, but can in principle also be made in several pieces.
  • the actuating element or the second component can be held in the switching positions via a self-locking or advantageously via a latching device.
  • the spring element can be integrally formed on the first and / or on the second component. However, if the spring element and the first component and / or the second component are formed by separate components, the shape and in particular the material of the spring element can be tailored to its function and the loads resulting therefrom.
  • the spring element can be made of a plastic, but the spring element is particularly advantageously made of spring steel. A flow and fatigue of the material of the spring element can be avoided even under long live conditions.
  • first and / or the second component are connected to the spring element via at least one integrally formed form-locking element in at least the two switching directions, additional fastening parts and the assembly effort can be reduced.
  • the spring element can be arranged between various components that appear sensible to a person skilled in the art, such as, for example, between the coupling element and one
  • the spring element can be arranged between a shift fork and a second component driven by the actuator.
  • the shift fork can be made in one piece with the coupling element or be formed by a component separate from the coupling element, as a result of which the coupling element can be formed from a high-strength material and the shift fork from a light, inexpensive material that is appropriate to the loads.
  • a simple construction and simple assembly can be achieved with a shift fork which is designed separately from the coupling element.
  • the actuating element can be designed as a rotary knob, and furthermore a positive connection in both switching directions can advantageously be achieved in a structurally simple manner without additional components using a toothed wheel and a toothed rack.
  • the actuating element can also act via one or more control urves via the spring element on the shift fork or on the coupling element or can also be designed as a slide.
  • the toothed rack and the actuating element are connected to one another via at least one molded-on positive-locking element. Additional fastening parts can be saved and in particular the rack can advantageously be used the actuating element and the actuating element can be fastened to a housing part by the toothed rack.
  • the spring element can have various designs that appear useful to the person skilled in the art. A particularly light, space-saving and inexpensive construction can be achieved with a bending rod. With a torsion spring, on the other hand, a large deformable material volume can advantageously be achieved via windings, and a precisely determined spring force can easily be achieved with the torsion spring. If the torsion spring engages on one component with two legs and is supported on the other component on a form-locking element designed as a pin, components and assembly effort can be saved.
  • the solution according to the invention can be used particularly advantageously in hand-held power tools in various machine tools which appear to be useful to a person skilled in the art and, due to a possible space-saving and light construction, such as in drilling or impact drilling machines, rotary or chisel hammers, angle grinders, screwdrivers, saws, Milling etc.
  • Fig. 1 is a schematically shown impact drill
  • Fig. 2 shows a section of a gearbox of the impact drill from Fig. 1
  • Fig. 3 is a view in the direction III in Fig. 2 in the assembled state in a housing
  • Fig. 4 shows a shift fork during assembly a spring rod and a toothed rack
  • FIG. 5 shows an actuating element during assembly in a housing
  • FIG. 6 shows the rack from FIG. 4 when connected to the actuating element from FIG. 5
  • FIG. 7 shows the switching device from FIG. 2 in a preselected position
  • FIG. 8 shows the switching device from FIG. 7 after a switching process has been carried out
  • FIG. 9 shows a Section of a variant of FIG. 2, FIG. 10 a view in the direction X in FIG. 9 and FIG. 11 a view in the direction XI in FIG. 10.
  • FIG. 1 shows an impact drill with an electric motor, not shown, which is mounted in a housing 64.
  • the electric motor is connected via a manual transmission 10, via a ne drill spindle 66 and a drill 62 clamped in the drill chuck 68 can be driven via a drill chuck 68 screwed onto the drill spindle 66 (FIGS. 1 and 2).
  • a detent mechanism 104 is arranged to generate axial pulses on the drilling spindle 66.
  • the gearbox 10 has two idler wheels 70, 72 which are arranged next to one another and are axially fixed and rotatably mounted on the drilling spindle 66 and mesh with fixed wheels which are not shown in more detail and are mounted on a countershaft.
  • the idler wheels 70, 72 have a coupling toothing 76, 78, ra ⁇ ial to the drill spindle 66, via which the idler wheels 70, 72 are rotatably mounted in a groove 74 of the drill spindle 66 and m two axial switching directions 28, 30 displaceable metal coupling 18 with a drill spindle 66 can be coupled.
  • the clutch 18 can be guided radially between the loose wheels 70, 72 and the drilling spindle 66 with a clutch toothing 80 and can be connected in a form-fitting manner with the clutch teeth 76, 78 of the loose wheels 70, 72 with the clutch toothing 80.
  • a ring 112 is arranged in a U groove 82, on which a one-piece shift fork 24 made of plastic with a molded groove 110 m
  • the gearbox 10 has an actuating element 14 made of plastic as a rotary knob, to which a gear wheel 84 is molded.
  • the gear 84 meshes in a rack 50, to which a cylindrical component 32 is integrally formed, which is axially displaceable in the switching directions 28, 30 by the actuating element 14 via the gear 84 and the rack 50.
  • the component 32 is connected to the shift fork 24 in the power flow from the actuating element 14 to the clutch 18 via a spring element 20 made of spring steel and formed by a separate spring rod.
  • the spring element 20 engages in a form-locking element formed as a recess on the shift fork 24
  • the spring element 20 is in a first part 32 v / ironing area 86 of the recess movably guided in the switching directions 28, 30.
  • the area 86 tapers in the direction facing away from the component 32 and opens into a bore 88 in which the spring element 20 is positively connected to the shift fork 24 in the switching direction 28, 30.
  • the spring element 20 engages in the component 32 with an integrally formed form-locking element 42 designed as a hook-shaped part in a correspondingly shaped form-locking element 44 designed as a recess.
  • the spring element 20 is positively connected to the component 32 with its hook-shaped part in the recess in the switching directions 28, 30.
  • the spring element 20 with the hook-shaped part is inserted into the recess of the component 32 (FIG. 4).
  • the shift fork 24 is attached to the spring element 20.
  • the actuating element 14 is pushed with the gear 84 through an opening of a housing part 56 of the impact drill (FIG. 5).
  • the rack 50 which has been preassembled with the spring element 20 and the shift fork 24, is pushed into the housing part 56, and the rack 50 is turned laterally in the switching direction 30 onto the gear wheel 84 (FIG. 6).
  • a positive locking element 52 designed as a hook on the rack 50 engages in a positive locking element 54 of the actuating element 14 designed as a recess.
  • the toothed rack 50 and the actuating element 14 are connected to one another via the positive locking elements 52, 54 (FIG. 3). Furthermore, the rack 50 is fastened to the housing part 56 by the actuating element 14 and the actuating element 14 is fastened by the rack 50. Additional fastening parts are saved.
  • the spring element 20 can be braced in both switching directions 28, 30, and it can be in both switching directions 28, 30, in particular when the electric motor is at a standstill when clutch teeth of the clutch teeth 80 of the clutch 18 and clutch teeth of the clutch teeth 76 are covered or 78 of the idler gear 70 or 72 a shift position of the manual transmission 10 are preselected.
  • 7 shows the manual transmission 10 in a preselected position.
  • Component 32 is displaced in shift direction 28 relative to shift fork 24, and spring element 20 is preloaded.
  • the clutch 18 is switched by the spring element 20 and the idler gear 70 via its clutch teeth 76 and non-rotatably connected to the drilling spindle 66 via the coupling toothing 80 of the coupling 18 (FIG. 8). Then the drilling spindle 66 is driven by the electric motor with a gear ratio assigned to the switched idler gear 70.
  • the manual transmission 12 has an actuating element 16 made of plastic as a rotary knob, onto which a gear 84 is molded.
  • the gear 84 meshes in a rack 50, to which a component 34 is integrally formed and which is axially displaceable in the switching directions 28, 30 by the actuating element 16 via the gear 84 and the rack 50.
  • the component 34 is connected in the power flow from the actuating element 16 to a clutch (not shown in more detail) via a spring element 22 made of spring steel as a torsion spring with a shift fork 26.
  • the actuating element 16 is fastened to a housing part (not shown in more detail) via a locking ring 96 which engages in a recess 98 in the actuating element 16 (FIG. 10).
  • the actuating element 16 is sealed off from the housing part by a sealing ring 106.
  • the shift fork 26 is held on the housing part by holding elements, not shown, which engage in an H-profile 100 of the component 34.
  • the spring element 22 is mounted with a molded-on form-locking element 46 designed as a spiral on a form-locking element 48 of the component 34 designed as a pin. Furthermore, the spring element 22 engages with a first leg 58 in a form-fitting manner 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 on the shift fork 26, formed as a projection form-locking element 40 in the switching direction 30.
  • One leg 60 of the spring element 22 is in front of the actuating element 16 in the axial direction and one leg 58 is arranged after the shift fork 26 (FIG. 11).
  • the gear 84 is arranged between the rack 50 and the shift fork 26, whereby the spring element 22 can advantageously be designed with long legs 58, 60 despite a small overall volume and a large deformable spring volume can be achieved.
  • the spring element 22 can be clamped in both switching directions 28, 30, and a switching position can be preselected in both switching directions 28, 30 in accordance with the exemplary embodiment in FIGS. 1 to 8.
  • a web 114 is formed on the component 34 and projects in the axial direction of the pin between the legs 58, 60 of the spring element 22.
  • the spring element 22 can advantageously be mounted in a prestressed manner. The web 114 prevents the legs 58, 60 from crossing.
  • a bolt 102 is formed on the actuating element 16, which is guided in a groove (not shown in detail) which extends over approximately 180 ° in the housing part and in the switching positions at the end the groove strikes and the actuating element 16 in its limited rotational movement.
  • the actuating element 16 is fixed by means of a latching pin 92, which is displaceable against a compression spring 108 when switching (FIG. 10).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Mechanical Operated Clutches (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

La présente invention concerne une boîte de vitesses (10, 12) pouvant être commandée à partir d'un élément de commande (14, 16) par l'intermédiaire d'au moins un élément d'embrayage (18). Ladite boîte de vitesse est reliée de manière fixe à un élément à ressort (20, 22) se trouvant dans la direction du couple de transmission entre l'élément de commande (14, 16) et l'élément d'embrayage (18), à une première pièce (24, 26) dans au moins deux directions d'embrayage (28, 30), et, dans la direction opposée au couple de transmission, à une deuxième pièce (32, 34) au moins dans deux directions d'embrayage (28, 30).
EP01909706A 2000-02-19 2001-01-30 Machine-outil Expired - Lifetime EP1259357B1 (fr)

Applications Claiming Priority (3)

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

Publications (2)

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

Family

ID=7631583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01909706A Expired - Lifetime EP1259357B1 (fr) 2000-02-19 2001-01-30 Machine-outil

Country Status (6)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011020644A1 (fr) * 2009-08-18 2011-02-24 Robert Bosch Gmbh Unité de commande pour machine-outil à main

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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
US20120175142A1 (en) * 2009-07-17 2012-07-12 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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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011020644A1 (fr) * 2009-08-18 2011-02-24 Robert Bosch Gmbh Unité de commande pour machine-outil à main
US9643309B2 (en) 2009-08-18 2017-05-09 Robert Bosch Gmbh Portable machine tool switching unit

Also Published As

Publication number Publication date
US6942435B2 (en) 2005-09-13
CN100406207C (zh) 2008-07-30
JP4933713B2 (ja) 2012-05-16
DE10007665A1 (de) 2001-09-06
DE50100576D1 (de) 2003-10-09
CN1404431A (zh) 2003-03-19
WO2001060570A1 (fr) 2001-08-23
JP2003523835A (ja) 2003-08-12
US20030079562A1 (en) 2003-05-01
EP1259357B1 (fr) 2003-09-03

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