EP2199029A2 - Interrupteur rotatif - Google Patents

Interrupteur rotatif Download PDF

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Publication number
EP2199029A2
EP2199029A2 EP09177133A EP09177133A EP2199029A2 EP 2199029 A2 EP2199029 A2 EP 2199029A2 EP 09177133 A EP09177133 A EP 09177133A EP 09177133 A EP09177133 A EP 09177133A EP 2199029 A2 EP2199029 A2 EP 2199029A2
Authority
EP
European Patent Office
Prior art keywords
rotation
adjusting element
rotary handle
axis
rotary
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.)
Withdrawn
Application number
EP09177133A
Other languages
German (de)
English (en)
Other versions
EP2199029A3 (fr
Inventor
Benedikt Günther
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 EP2199029A2 publication Critical patent/EP2199029A2/fr
Publication of EP2199029A3 publication Critical patent/EP2199029A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B25D2216/0015—Tools having a percussion-only mode
    • 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
    • B25D2250/255—Switches
    • 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
    • B25D2250/371—Use of springs
    • 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
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary

Definitions

  • the present invention relates to a rotary switch and a hand tool with such a rotary switch, in particular a rotary switch for selecting between two modes of the power tool, e.g. an impact operation and a Bohrschlag plante a combination hammer.
  • a rotary switch for actuating an axially displaceable switching element of a power tool is known from EP 1 632 314 A2 known.
  • On a turning handle an eccentrically arranged parabolic nose is clamped.
  • a coil spring is suspended outside the rotary handle on a pin.
  • Two spring legs of the spiral spring enclose the parabolic nose.
  • the two spring legs clamp a projection on the axially displaceable switching element.
  • the rotary switch to EP 1 632 314 A2 allows to realize a synchronization of the position of the axially displaceable switching element with the position of the rotary switch with only one coil spring and regardless of the direction of rotation.
  • there is a high installation cost of the rotary switch because it can not be applied in one piece to the machine tool.
  • the two spring legs must be clamped when the coil spring is mounted.
  • the inventive rotary switch for moving a switching element includes a rotary handle, a torsion spring, a rotatable actuator and a common axis.
  • the rotary handle, the torsion spring and the rotatable adjusting element are rotatably mounted about the common axis.
  • the rotary handle and the rotatable adjusting element are coupled via the torsion spring such that a relative rotation of the rotary handle with respect to the rotatable adjusting element, the torsion spring twisted.
  • On the rotatable adjusting element an eccentric for converting a rotational movement of the rotatable adjusting element is provided in a displacement of the switching element.
  • the rotatable actuator follows the rotational movement of the rotary handle, as far as the actuator is not hindered by the coupled to the eccentric switching element.
  • the rotatable actuator and the rotary handle then take a synchronous position again.
  • the relative rotation is to understand one of the synchronous positions of the rotary handle with respect to the actuating element.
  • the torsion spring is preferably again in a rest position with little or no tension. This is possible because the torsion spring can also rotate about the axis of rotation. A mechanical load on the rotary switch in a synchronous position can therefore advantageously be low.
  • the joint arrangement of the elements on an axis allows prefabrication of the rotary switch, which can then be attached as a component to a machine tool. In particular, no attachment of the clamping legs of a spring on a machine tool is necessary.
  • the rotary handle against the rotatable adjusting element in the negative direction of rotation and positive direction of rotation with respect to the axis of rotation is rotatable.
  • the rotary handle and the rotatable adjusting element each include a stop which points in the positive direction of rotation with respect to the axis of rotation, and a stop which points in the negative direction of rotation with respect to the axis of rotation.
  • the torsion spring has two attack elements.
  • the attack elements are arranged opposite to the attacks that when a relative rotation force applied an attack element with one of the attacks of the rotary handle and the other attacking element kraftbeaufschlagt coupled with one of the stops of the rotatable control element, wherein the kraftbeaufschlagte stop the rotary handle and the kraftbeaufschlagte stop of the control element pointing in opposite direction of rotation.
  • the attacks thus brace the torsion spring when the actuator of a Rotary movement of the rotary handle can not follow synchronously.
  • the torsion spring can be biased in both directions in the rest position. As a result, the switching force can be increased.
  • One embodiment provides that one of the engagement elements coupled only with the attacks of the rotary handle and the other attack element only with the attacks of the control element or that one of the attack elements coupled only with attacks that point in positive direction, and the other attack element coupled only with attacks that point in negative direction.
  • the engagement elements may have a radial extension that extends at least over the first distance and second distance from the axis of rotation.
  • the stops of the rotary handle can be arranged at a first distance to the axis of rotation, the stops of the rotatable adjusting element at a second distance to the axis of rotation, wherein the first and second distances are different.
  • the engagement elements limit a continuous circular sector with respect to the axis of rotation, within which all stops are arranged. In a synchronous position, one of the stops of the rotary handle and one of the stops of the actuating element on one of the engagement elements and the other stop of the rotary handle and the other stop of the actuating element can rest against the other engagement element.
  • a further development is characterized by a rotatable bearing which has a hollow hub and a pin rotatably inserted in the hollow hub.
  • the hollow hub may be formed as part of the rotary handle and the pin as part of the rotatable adjusting element or the hollow hub as part of the rotatable adjusting element and the pin as part of the rotary handle.
  • the rotary handle and / or the rotatable adjusting element can be produced in one piece as injection-molded parts. As a result, a simple and compact construction of the rotary switch can be achieved.
  • an axially displaceable clutch may be provided for switching between the drive modes.
  • a selector switch is designed as a rotary switch according to the invention, whose eccentric is coupled to the clutch.
  • the switching paths or the distance of the eccentric to the axis may be such that in the desired switching positions a connecting line of the eccentric to the axis parallel to the axial Wegweg.
  • the selector switch and the spring can thereby be decoupled from forces acting in the axial direction.
  • the eccentric is coupled to the coupling by means of a sleeve-shaped switching linkage.
  • the machine tool may have a cylindrically shaped drive device, wherein the sleeve-shaped shift linkage surrounds the drive device.
  • the sleeve-shaped shift linkage ensures a high mechanical stability.
  • the shift linkage can be mounted rotatably relative to the clutch about its axis of symmetry.
  • the shift linkage and the coupling can be annularly formed interlocking for axial displacement of the clutch by the shift linkage.
  • the shift linkage can thus operate this independent of the rotational position of the clutch.
  • the annular engagement ensures a uniform application of force to avoid tension.
  • the machine tool can have a striking drive and a rotating drive for a tool, wherein the coupling selectively couples the striking drive and / or the rotating drive with the tool.
  • the machine tool may in particular be a hand tool, a combination hammer.
  • Fig. 1 shows a section of a combination hammer 1 in longitudinal section.
  • an anvil (not shown) can be reciprocated by a drive mechanism.
  • the striker strikes a tool (not shown) inserted in the tool holder 3.
  • the tool holder 3 can be rotated about its longitudinal axis 4 by a drive described below.
  • the tool then performs a beating as well as rotating movement.
  • An operator can select by means of a selector switch 10 whether the combination hammer 1 hits the tool alone (impact mode) or additionally rotates (drill stroke mode).
  • a drive wheel 6 and a clutch 7 are rotatably mounted around the guide tube 2.
  • the drive wheel 6 is driven by a prime mover, e.g. an electric motor, driven by a gear and / or linkage.
  • the clutch 7 is slidably mounted along the longitudinal axis 4. The clutch 7 may be pushed in a first position with the drive wheel 6 in engagement. The rotation of the drive wheel 6 is then transmitted via the coupling 7 to the tool holder 3. This corresponds to the beating and rotating operating mode of the combination hammer 1.
  • the clutch 7 is pulled out of engagement with the drive wheel 6.
  • the combination hammer 1 performs only one stroke on the tool.
  • the selector switch 10 shifts the clutch 7 between the first and second positions.
  • the selector switch 10 is designed as a rotary switch, which has an eccentric 11.
  • the eccentric 11 engages in an eyelet 12 of a switching element 13 a.
  • the switching element 13 may be formed as a sleeve which surrounds the guide tube 2 radially.
  • the switching element 13 is displaceable along the guide tube 2.
  • an annular structure 14 is provided into which the coupling 7 engages with a corresponding annular structure 15.
  • the switching element 13 an annular protuberance or hook, which engages in an annular recess of the coupling 7.
  • the clutch 7 and the drive wheel 6 may be formed as a toothed wheel or bevel gear.
  • a relative to the longitudinal axis 4 fixed, in particular non-rotatable, locking 16 may be provided.
  • the detent 16 may be formed as a tooth on which the clutch 7 is pushed in the second position. This prevents rotation of the tool.
  • a spring element 17 can act on the clutch 7 with such a force that the clutch 7 is released in a fraction of the switching element 13 of the drive wheel 6 and possibly pushed onto the lock 16.
  • the spring element 17 can, as shown, be realized as a spring pushing the clutch or else as a pulling spring (not illustrated).
  • FIG. 4 shows a side view
  • Fig. 2 a top view
  • Fig. 3 a cross section transverse to a rotation axis 21 of the selector switch 10 in the plane AA of 4
  • FIG. 5 a longitudinal section along the axis of rotation 21 in the plane BB of Fig. 3 ,
  • An adjusting element 22 of the selector switch 10 is formed from the eccentric 11 and a hollow hub 23.
  • the hollow hub 23 defines an axis of rotation 21 of the selector switch 10.
  • a rotary handle 24 of the selector switch 10 has a pin 25.
  • the pin 25 is inserted into the hollow hub 23, such that the rotary handle 24 can be rotated relative to the adjusting element 22 and thus to the eccentric 11.
  • a collar 26 may surround the rotary handle 24.
  • the rotary handle 24 may be recessed a circumferential groove 27 which prevents slipping of the sleeve 26.
  • the collar 26 may be used to secure the twist grip 24 to a housing of the combination hammer 1.
  • the rotary handle 24 is rotatable with respect to the sleeve 26 or at least the housing.
  • a torsion spring 30 is pushed onto the hollow hub 23.
  • the torsion spring 30 may be, for example, a coil spring with one or more turns.
  • the torsion spring 30 has two engagement elements 31, 32, which may preferably be formed by angled end pieces of the torsion spring 30.
  • the two engagement elements 31, 32 can protrude in the radial direction from the torsion spring 30, such as in Fig. 3 shown.
  • the two Engagement elements 31, 32 define an angular range 33 within the rotary switch 10 with respect to the axis of rotation 21.
  • the height of the arrangement of the two engagement elements 31, 32, ie in their direction along the axis of rotation 21, may be different.
  • the rotary handle 24 has two stops 34, 35, which are arranged at two different angular positions with respect to the axis of rotation 21, but within the same defined by the attack elements 31, 32 angle range 33.
  • the two stops 34, 35 can, as shown by a protruding Segment 36 are formed, which is arranged in the interior of the rotary handle 24 and is formed continuously from one angular position to the other angular position.
  • two lugs are provided at the respective angular positions.
  • the arrangement of the protruding segment 36 or the lugs in one direction along the axis of rotation 21 corresponds to the height of the two engagement elements 31, 32 of the torsion spring 30.
  • the rotary handle 24 is thus designed such that it rotates about the axis of rotation 21 in exactly one the two engagement elements 31, 32 engages.
  • the torsion spring 30 is itself rotatably mounted about the rotation axis 21. On the one hand, the torsion spring 30 is prevented by any intervention on the other of the two engagement elements 31, 32 in their movement, the torsion spring 30 is carried by the rotary handle 24. On the other hand, if the torsion spring 30 is held on the other engagement element 31, 32 for reasons to be explained by the actuator 22, this leads to a tensioning of the torsion spring 30.
  • the torsion spring 30 can be stretched or compressed depending on the structure during tightening.
  • the adjusting element 22 has the same as the rotary handle 24 also stops 37, 38, which are arranged at further angular positions.
  • the further angular positions can correspond to the angular positions of the stops 34, 35 of the rotary handle 24.
  • the stops 37, 38 of the adjusting element 22 are both within the same angular range 33 as the stops 34, 35 of the rotary handle 24 with respect to the engagement elements 31, 32 of the torsion spring 30 is arranged.
  • first of the stops 34, 35 of the rotary handle 24 together with a second of the stops 37, 38 of the actuating element 22, the torsion spring 30.
  • the first stop 34, 35 and the second stop 37, 38th are the furthest within the angular range 33 of spaced stops.
  • the selector switch 10 has locking positions, not shown, into which the rotary handle 24 engages.
  • the locking positions correspond to the desired operating modes of the combi hammer 1.
  • the clutch 7 may initially be prevented from axial movement when the clutch 7 is rotated relative to the lock 14 or the drive wheel 6, that they are prevented from engaging in each other.
  • the combination hammer 1 thus does not change the operating mode in synchronism with the operation of the selector switch.
  • the actuator 22 also follows hindered by the clutch 7 is not the rotational movement of the rotary handle 24, in sequence, the torsion spring 30 is tensioned.
  • the clutch 7 is further rotated relative to the lock 14 and the drive wheel 6. At a certain angular position a mutual engagement is possible.
  • the tensioned torsion spring 30 causes via the eccentric 11 a force to move the clutch 7 axially into engagement.
  • selector switch 10 Other embodiments of the selector switch 10 are possible.
  • the axis of rotation may be formed by a hollow hub of the rotary handle and a pin of the actuating element.
  • the pin is rotatably mounted in the hollow hub.
  • the torsion spring encloses the axis of rotation formed by the hollow hub and the pin.
  • the torsion spring is arranged between the hollow hub and the pin.
  • FIG. 6 Another embodiment of a selector switch 50 is shown in longitudinal section in FIG Fig. 6 shown.
  • the selector switch 50 is designed as a rotary switch.
  • the selector switch 50 has a rotary handle 51, a rotatable adjusting element 52 and a torsion spring 53, which are arranged concentrically to a common axis of rotation 54.
  • a pin 55 of the rotary handle 51 forms the axis of rotation 54.
  • the rotatable actuator 52 has a hollow hub 56, in which the pin 54 of the rotary handle 51 is inserted.
  • the rotatable adjusting element 52 has an eccentric 11 arranged offset to the axis of rotation 54.
  • the torsion spring 53 has two engagement elements 60, 61.
  • the engagement elements 60, 61 are preferably the ends of the torsion spring 53.
  • One of the engagement elements 60 is non-positively or positively connected to the rotary handle 51 and the other of the engagement elements 61 is positively or positively coupled to the rotatable actuator 52.
  • the torsion spring 53 is designed such that it can be twisted about the axis of rotation 54 in both directions of rotation.
  • the torsion spring 53 is formed as a spiral spring, in which the turns spaced apart from each other.
  • the torsion spring 53 in both cases exerts a force on the rotary handle 51 and the rotatable adjusting element 52 in such a way that the torsion spring 53 returns to its rest position.
  • FIG. 7 Another embodiment of the selector switch is in Fig. 7 shown.
  • the torsion spring 73 is arranged offset in height to the hollow hub 75.
  • the engagement elements 76, 77 are in turn coupled to the rotary handle 71 and the rotatable actuator 52.
  • the pin which is inserted into the hollow hub, may be formed as a torsion spring.
  • the selector switch can be used to operate a lever arm with its eccentric.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Switches With Compound Operations (AREA)
EP09177133.7A 2008-12-17 2009-11-26 Interrupteur rotatif Withdrawn EP2199029A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008054786A DE102008054786A1 (de) 2008-12-17 2008-12-17 Drehschalter

Publications (2)

Publication Number Publication Date
EP2199029A2 true EP2199029A2 (fr) 2010-06-23
EP2199029A3 EP2199029A3 (fr) 2016-10-12

Family

ID=41818390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09177133.7A Withdrawn EP2199029A3 (fr) 2008-12-17 2009-11-26 Interrupteur rotatif

Country Status (3)

Country Link
US (1) US8205682B2 (fr)
EP (1) EP2199029A3 (fr)
DE (1) DE102008054786A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103338418A (zh) * 2013-06-27 2013-10-02 歌尔声学股份有限公司 一种耳机和一种音乐播放控制组件

Families Citing this family (5)

* 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
DE102012202278A1 (de) * 2012-02-15 2013-08-22 Hilti Aktiengesellschaft Handwerkzeugmaschine
US11261964B2 (en) * 2018-05-17 2022-03-01 Black & Decker Inc. Compliant shifting mechanism and multi-speed power tool having same
CN109449034A (zh) * 2018-11-28 2019-03-08 贵州贵航汽车零部件股份有限公司华阳电器公司 一种双层旋转轨迹结构的档位开关
WO2020195725A1 (fr) * 2019-03-28 2020-10-01 工機ホールディングス株式会社 Machine de travail de frappe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1632314A2 (fr) 2004-09-03 2006-03-08 Robert Bosch Gmbh Commutateur avec un ressort de synchronisation

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393782A (en) * 1966-01-05 1968-07-23 Rockford Machine Tool Co Shifter for toothed drive member
DE2728961C2 (de) * 1977-06-27 1991-08-08 Hilti Ag, Schaan Bohrhammer mit arretierbarem Werkzeughalter
DE3538166A1 (de) * 1985-10-26 1987-04-30 Hilti Ag Bohrhammer mit dreharretierung
JP2602411Y2 (ja) * 1993-11-26 2000-01-17 日立工機株式会社 打撃工具の切換機構
BG98935A (en) * 1994-07-29 1996-04-30 Ganchev Device for shifting connecting lever of two-speed gears
GB9621202D0 (en) * 1996-10-11 1996-11-27 Black & Decker Inc Mode change switch
JP3582760B2 (ja) * 1997-04-18 2004-10-27 日立工機株式会社 ハンマドリル
DE102004045117A1 (de) * 2004-09-17 2006-03-23 Robert Bosch Gmbh Schaltvorrichtung
DE102004057686A1 (de) * 2004-11-30 2006-06-01 Robert Bosch Gmbh Schaltvorrichtung
JP4812471B2 (ja) * 2006-03-09 2011-11-09 株式会社マキタ 作業工具

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1632314A2 (fr) 2004-09-03 2006-03-08 Robert Bosch Gmbh Commutateur avec un ressort de synchronisation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103338418A (zh) * 2013-06-27 2013-10-02 歌尔声学股份有限公司 一种耳机和一种音乐播放控制组件
CN103338418B (zh) * 2013-06-27 2016-09-07 歌尔股份有限公司 一种耳机和一种音乐播放控制组件

Also Published As

Publication number Publication date
EP2199029A3 (fr) 2016-10-12
US8205682B2 (en) 2012-06-26
DE102008054786A1 (de) 2010-07-01
US20100218965A1 (en) 2010-09-02

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