EP3408055B1 - Schraubwerkzeug mit richtungsumschaltbarem freilaufgesperre - Google Patents

Schraubwerkzeug mit richtungsumschaltbarem freilaufgesperre Download PDF

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Publication number
EP3408055B1
EP3408055B1 EP17700402.5A EP17700402A EP3408055B1 EP 3408055 B1 EP3408055 B1 EP 3408055B1 EP 17700402 A EP17700402 A EP 17700402A EP 3408055 B1 EP3408055 B1 EP 3408055B1
Authority
EP
European Patent Office
Prior art keywords
switching
locking
teeth
screwing tool
toothing
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.)
Active
Application number
EP17700402.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3408055A1 (de
Inventor
Michael Abel
Ralf-Richard Richter
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.)
Wera Werkzeuge GmbH
Original Assignee
Wera Werkzeuge 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
Application filed by Wera Werkzeuge GmbH filed Critical Wera Werkzeuge GmbH
Publication of EP3408055A1 publication Critical patent/EP3408055A1/de
Application granted granted Critical
Publication of EP3408055B1 publication Critical patent/EP3408055B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25B13/00—Spanners; Wrenches
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/462—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
    • B25B13/463—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an externally toothed wheel
    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/04—Spanners; Wrenches with rigid jaws of ring jaw type
    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/468—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member with possibility of locking the ratchet mechanism

Definitions

  • the invention relates to a screwing tool with a direction-reversible freewheel locking mechanism, comprising an output member which is mounted in a bearing eye of a drive member so as to be rotatable about an axis and has a peripheral toothing and an output profile section, and locking members which are located in a pocket of the drive member and each have a locking toothing for rotationally locking engagement in the peripheral toothing.
  • the US 2013/0291688 A1 describes a screwing tool of the type described above with two locking members which can optionally engage with a toothing in a peripheral toothing of an output profile section.
  • a screwing tool in the form of a ratchet wrench describes the EN 10 2014 113 758 A1 .
  • a drive member is formed there by an elongated body which has an open-end wrench profile at one end and a ring wrench profile at the other end.
  • the output profile (ring wrench profile) is formed by an output member which is rotatably mounted in a bearing eye and has a peripheral toothing.
  • a locking body is provided which has two locking toothing sections which each engage in the peripheral toothing in one of the two switching positions in order to block the rotation of the output member relative to the drive member in one of the two directions of rotation.
  • the locking body forms a first locking member, which, in a first switching position of a switching element, lies in a locking gusset, which is opposite a second locking gusset.
  • the locking body can be moved within a pocket so that a second locking element lies in the second locking gusset.
  • the two locking elements are connected to one another using the same material.
  • the invention is based on the object of further developing the direction-switchable freewheel lock in a manner that is advantageous for use.
  • the locking members are preferably not connected to one another using the same material.
  • the locking members can preferably move against one another in a hinge-like manner.
  • the hook projections are provided, which engage with one another.
  • Each locking member has a locking toothing that runs on a circular arc line, the center of which coincides with the center of the peripheral toothing in the tooth engagement position. It is provided that in the two switching positions in which the output member can be rotated in one direction of rotation but is locked in the other direction of rotation, only one of the two switching members engages with its locking toothing in the peripheral toothing.
  • the locking members are essentially designed to be hingedly symmetrical.
  • Each locking member can have a switching extension, with the two switching extensions preferably protruding into the same switching recess of a switching member.
  • a spring-loaded control flank can be arranged within the switching member.
  • the control flank can be formed by a curved surface of a switching plunger.
  • the switching plunger can be inserted into a hole in the switching element and acted upon by a switching spring.
  • the switching spring can in turn be supported on a locking plunger, which interacts with a locking cam, which engages in a locking recess in each of the two switching positions.
  • the locking cam can be connected to the locking plunger in the same material. However, the locking cam is preferably formed by a locking ball, which is acted upon by the locking plunger.
  • the switching element can lie in a bore in the drive element so that it can rotate about an axis parallel to the axis of rotation. When the direction of the freewheel lock is changed, the switching element is rotated about its axis. It displaces the two locking elements, which are preferably coupled to one another, in an azimuthal direction in a pocket of the drive element, which forms two locking gussets opposite one another in an azimuthal direction, with each locking gusset being formed by a wall of the pocket and by a section of the peripheral toothing.
  • the section of the wall of the pocket runs at an incline or curve relative to the peripheral toothing in such a way that an imaginary extension of the pocket wall intersects the peripheral toothing.
  • a contact flank of the locking body rests on this wall and runs in a wedge shape to the locking teeth.
  • the output member can rotate freely in a freewheeling direction and is rotationally locked in a locking direction.
  • the locking member is pressed into the respective locking gusset by teeth of the locking teeth engaging with the peripheral teeth.
  • the contact flank of the locking body lies on the wall of the locking gusset.
  • the two switching elements move in a joint-like manner towards one another, so that in an intermediate position in which the curved surface of the switching plunger engages the free ends of the switching extensions, both locking teeth of the locking body are simultaneously in mesh with the peripheral teeth.
  • the switching plunger moves in a radial direction relative to the axis of rotation of the switching element and tensions the switching spring.
  • the switching elements In their plane of movement, which runs perpendicular to the axis of rotation, the switching elements have a substantially L-shaped contour, with one L-leg forming an arm that forms the locking teeth and the contact flank, and an arm of the other L-leg, which runs essentially transversely to this, forming the switching extension.
  • the switching extension forms an arm with longitudinal sides pointing away from one another, which merge into one another at their ends to form a curve or a point. These end regions of the longitudinal flanks of the switching extensions are acted upon by the control flank, which is preferably formed by the desired surface of the switching plunger.
  • the locking locking element acts upon the longitudinal flank of the locking extension pointing away from the locking teeth.
  • the non-locking locking element acts upon the longitudinal flank of the switching extension pointing towards the locking teeth. The result is that the locking teeth of the non-locking locking member are acted upon in a direction away from the peripheral teeth and the locking teeth of the locking locking member are acted upon into the peripheral teeth.
  • the control flank When switching, the control flank essentially engages in the apex area of the two longitudinal flanks, so that in an intermediate position there is a relative rotation of the two locking members, in which both locking teeth engage the peripheral teeth simultaneously.
  • the two locking members form an overlap area in which the interlocking hook projections are arranged.
  • the hook projections engage with each other with such a pivoting movement play that the locking members can pivot from an operating position in which the locking teeth lie on a common circular arc line to another operating position in which the two centers of the locking teeth are spaced apart from each other. In the operating position, in which the locking teeth run on a common circular arc, the two switching extensions lie congruently on top of each other.
  • the switching extensions are offset from each other in such a way that they can be moved towards each other can be brought into alignment like a scissor joint, whereby the joint is formed by the interlocking hook projections.
  • the switching extensions are sections of the overlapping areas.
  • the screwing tool shown in the drawings has an external shape as shown in the EN 10 2014 113 758 A1 shown and described.
  • the screwing tool has an elongated drive member 1, which has a wrench opening at one free end and a bearing eye 6 at its opposite free end.
  • An annular output member 2 is rotatably mounted in the bearing eye 6 with an output profile, which is an internal polygon profile.
  • the output member 2 can also have a different shape, for example form an output polygon, which then forms the output profile.
  • the output member 2 has a peripheral toothing 5 with a large number of radially outward-pointing teeth, the straight tooth flanks of which are roof-shaped.
  • a pocket which forms two locking gussets 17, 27 which are opposite one another in the circumferential direction.
  • the locking gussets 17, 27 are formed by walls 18, 28 of the pocket which extend in an arc shape from a bearing bore for supporting a switching element 3 to the radially inner edge of the bearing eye 6 and whose extension intersects the circumferential toothing 9.
  • two locking members 10, 20 formed by separate bodies are mounted, which form locking bodies that touch each other and in overlapping areas 15, 25 also lie on top of each other in some areas, but are pivotably associated with one another.
  • the locking members 10, 20 are designed to be symmetrical to one another. They have an L-shape extending in the plane of movement, with one L-leg being formed by an arm 19, 29 and a second L-leg by a switching extension 13, 23. The two arms 19, 29 point away from one another.
  • the switching extensions 13, 23 adjoin the respective overlapping areas 15, 25 and overlap.
  • the two locking members 10, 20 are coupled to one another in a joint-like manner. To this end, they each form a hook projection 32 in the overlapping area 15, 25. The two hook projections each engage in a niche. The two hook projections 32 have sufficient movement play so that the locking members 10, 20 can pivot against one another.
  • the switching extension 13, 23 forms a longitudinal flank pointing towards the arm 19, 29, which merges into a concavity 16, 26, which is followed by a contact flank 12, 22.
  • the arm 19, 29 has two longitudinal flanks running essentially parallel to one another, which merge into one another at the free end 14, 24 of the switching extension 13, 23, forming a curve or a peak.
  • the contact flank 12, 22 merges into a locking toothing 11, 21, forming an acute angle.
  • the locking toothing 11, 21 extends along a circular arc line, the radius of which corresponds to the radius of the circular arc line along which the peripheral toothing 5 extends.
  • the locking toothing 11, 21 extends into the overlap area 15, 25, in which sections of the switching elements 10, 20, which also include the switching extensions 13, 23, lie one above the other in the direction of the axis a.
  • the switching extensions 13, 23 engage in a switching recess 30, which is a radial opening in a cavity of the switching element 3.
  • a switching plunger 7 which has a curved surface 7' pointing radially outwards, which forms a control flank.
  • a switching spring 8 is supported on a locking plunger 9 and acts on the switching plunger 7 in a radially outward direction.
  • the locking plunger 9 acts on a locking ball 33, which can engage in one of two locking recesses 31 in order to prevent the switching element 3 from rotating in one of its two switching positions.
  • the free end 14, 24 of the switching extension 13, 23 forms apex surfaces pointing away from one another, on which the switching flank 7' acts in order to exert a spring force on the locking element 10, 20.
  • the control flank 7' acts on a crest flank of the free end 14 of the switching extension 13 in the direction of the locking gusset 17.
  • the control flank 7' engages the longitudinal flank of the switching extension 13 pointing away from the locking teeth 11.
  • the control flank 7' engages a crest flank of the free end 24 of the switching element 20 in such a way that the locking teeth 21 of the locking element 20 do not engage with the peripheral teeth 5.
  • the locking member 10 can be displaced in the direction out of the locking groove 17, whereby the contact flank 12 slides along the wall 18 and the locking teeth 11 separate from the peripheral teeth 5, so that the output member 2 can be freely rotated relative to the drive member 1.
  • the switching element 3 is rotated clockwise, whereby the free end 14, 24 of the switching extension 13, 23 of the locking element 10, 20 slides along the control flank 7'.
  • the apex areas of the ends 14, 24 are acted upon by the control flank 7' in such a way that the locking elements 10, 20 move relative to one another in a hinge-like manner.
  • both locking teeth 11, 21 engage in the peripheral teeth 5.
  • the two locking elements 10, 20 pivot about their hinge connection, which in the embodiment is formed by the two interlocking hook projections 32, until the switching extensions 13, 23 come into a congruent overlapping position.
  • the locking member 20 In the end position, the locking member 20 is acted upon by the force of the switching spring 8 in the locking groove 27 assigned to it, so that the contact flank 22 is supported on the wall 28 of the locking groove 27 and the locking teeth 21 of the locking member 20 engages in the peripheral teeth 5.
  • the locking teeth 11 of the locking member 10, which performs a non-locking function in this switching position, is located outside the peripheral teeth 5 (see Figure 5 ).
  • the two locking members 10, 20 are designed in such a way that the two locking teeth 11, 21 extend along the same circular arc when the two switching extensions 13, 23 lie overlapping one another.
  • the control flank 7' acts on the apex areas of the switching extensions 13, 23 that are not in the overlapping position in such a way that the locking members 10, 20 pivot against one another in such a way that in an intermediate position the two switching extensions 13, 23 assume an overlapping position, but when the switching member 3 pivots further they move again from the overlapping position to a non-overlapping position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Braking Arrangements (AREA)
  • Seats For Vehicles (AREA)
  • Mechanical Operated Clutches (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP17700402.5A 2016-01-27 2017-01-11 Schraubwerkzeug mit richtungsumschaltbarem freilaufgesperre Active EP3408055B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016101400.1A DE102016101400A1 (de) 2016-01-27 2016-01-27 Schraubwerkzeug mit richtungsumschaltbarem Freilaufgesperre
PCT/EP2017/050456 WO2017129402A1 (de) 2016-01-27 2017-01-11 Schraubwerkzeug mit richtungsumschaltbarem freilaufgesperre

Publications (2)

Publication Number Publication Date
EP3408055A1 EP3408055A1 (de) 2018-12-05
EP3408055B1 true EP3408055B1 (de) 2024-04-10

Family

ID=57799704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17700402.5A Active EP3408055B1 (de) 2016-01-27 2017-01-11 Schraubwerkzeug mit richtungsumschaltbarem freilaufgesperre

Country Status (7)

Country Link
US (1) US10828751B2 (ja)
EP (1) EP3408055B1 (ja)
JP (1) JP2019508267A (ja)
CN (1) CN108698210B (ja)
DE (1) DE102016101400A1 (ja)
TW (1) TWI712470B (ja)
WO (1) WO2017129402A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2556449B (en) * 2017-10-16 2018-10-24 William Hackett Lifting Products Ltd Dual pawl having two pawl arms rotatable about a common axis
DE102018131903A1 (de) 2018-12-12 2020-06-18 Wera Werkzeuge Gmbh Als Knarre verwendbarer Drehmomentschlüssel
TWI710430B (zh) * 2019-11-07 2020-11-21 優鋼機械股份有限公司 棘輪扳手之撥動件結構
CN110815104A (zh) * 2019-11-18 2020-02-21 中国航发贵州黎阳航空动力有限公司 摇转高压转子用扳杆
USD1007985S1 (en) * 2020-09-30 2023-12-19 Re-Dai Precision Tools Co., Ltd. Switcher of reversible ratchet wrench
USD1000922S1 (en) * 2021-01-07 2023-10-10 Chia-Yu Chen Switch knob for ratchet wrench

Citations (1)

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Publication number Priority date Publication date Assignee Title
EP3318365B1 (en) * 2016-11-08 2019-09-04 Stanley Chiro International Ltd. Ratchet wrench

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US5467672A (en) * 1992-04-20 1995-11-21 Ashby; Earl T. Open end ratchet wrench
GB2387135B (en) * 2002-04-05 2005-02-23 Chyi Hong Chen Ratchet box wrench
CN1456418A (zh) * 2002-05-09 2003-11-19 谢世揆 改良型梅花扳手的单向制动装置
US6584875B1 (en) * 2002-07-09 2003-07-01 Jackson Deng Ratchet wrench
TW554786U (en) * 2003-01-17 2003-09-21 Mu-Lin Chen Improved ratchet wrench structure
TWM250758U (en) * 2003-11-27 2004-11-21 Bing-Wen Huang Improved structure for socket ratchet wrench
TWI252143B (en) * 2004-05-19 2006-04-01 Hou-Fei Hu Three-stepped ratchet wrench
US7073412B1 (en) * 2004-10-12 2006-07-11 Easco Hand Tools, Inc. Method of forming a pawl pocket for a ratcheting tool and tool thereby formed
US7096763B1 (en) 2005-02-18 2006-08-29 Chih-Ching Hsieh Direction control device of ratchet spanner
US7987747B2 (en) * 2007-04-05 2011-08-02 Snap-On Incorporated Bias assembly for ratchet tools
TW201004745A (en) * 2008-07-24 2010-02-01 Hou-Fei Hu Slipping type direction-change ratchet wrench
TWM360112U (en) * 2008-11-26 2009-07-01 gui-quan Zhang Ratchet wrench structure
US8567287B2 (en) * 2009-04-07 2013-10-29 Steve Gapp Reversible open-ended ratchet wrench
US8776640B2 (en) * 2011-12-13 2014-07-15 Bobby Hu Ratchet wrench preventing jam of pawls
TW201323159A (zh) 2011-12-13 2013-06-16 Hou-Fei Hu 防卡死之棘輪扳手
TWI426004B (zh) * 2012-03-02 2014-02-11 Apex Tool Hk Ltd Ratchet wrench and body used in ratchet wrench
US9138875B2 (en) 2013-04-23 2015-09-22 Yi-Fu Chen Ratchet tool device
DE102014017614A1 (de) 2013-10-15 2015-04-16 Wera-Werk Hermann Werner Gmbh & Co. Kg Schraubwerkzeug mit richtungsumstellbarem Gesperre
US10864616B2 (en) * 2014-05-15 2020-12-15 Snap-On Incorporated Ratchet mechanism for ratchet wrench
TWM515935U (zh) * 2015-09-07 2016-01-21 gui-quan Zhang 組合式棘輪扳手

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Publication number Priority date Publication date Assignee Title
EP3318365B1 (en) * 2016-11-08 2019-09-04 Stanley Chiro International Ltd. Ratchet wrench

Also Published As

Publication number Publication date
US10828751B2 (en) 2020-11-10
DE102016101400A1 (de) 2017-07-27
WO2017129402A1 (de) 2017-08-03
TW201729953A (zh) 2017-09-01
EP3408055A1 (de) 2018-12-05
JP2019508267A (ja) 2019-03-28
CN108698210A (zh) 2018-10-23
CN108698210B (zh) 2021-01-12
TWI712470B (zh) 2020-12-11
US20190030689A1 (en) 2019-01-31

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