EP0314106A2 - Clé à cliquet - Google Patents

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Publication number
EP0314106A2
EP0314106A2 EP88117846A EP88117846A EP0314106A2 EP 0314106 A2 EP0314106 A2 EP 0314106A2 EP 88117846 A EP88117846 A EP 88117846A EP 88117846 A EP88117846 A EP 88117846A EP 0314106 A2 EP0314106 A2 EP 0314106A2
Authority
EP
European Patent Office
Prior art keywords
ratchet wrench
return
nut
wrench according
pawls
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Withdrawn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
EP88117846A
Other languages
German (de)
English (en)
Other versions
EP0314106A3 (fr
Inventor
Richard Schumm
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0314106A2 publication Critical patent/EP0314106A2/fr
Publication of EP0314106A3 publication Critical patent/EP0314106A3/fr
Withdrawn legal-status Critical Current

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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
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • 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
    • B25B13/467—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member which are gear-operated

Definitions

  • the invention relates to a ratchet wrench of the type specified in the preamble of claim 1.
  • Such a ratchet wrench is known from DE-OS 31 29 710 and DE-OS 36 10 508.
  • Generic is a radially attachable ratchet wrench, which can not only transmit large torques regardless of the toothing interrupted by the jaw opening, but can also cause the component to be screwed to rotate if the spatial conditions only allow the key arm to pivot by a few angular degrees, So in cases where even a normal hexagon wrench can no longer be used.
  • the nut of such a ratchet wrench will assume an end position in which radial removal of the tool is only possible when the nut, after it has been removed axially from the workpiece, it is turned until its mouth coincides with that of the key head.
  • This turning of the nut can not be carried out with the previously known ratchets either due to the high spring pressure blocking the nut without an additional tool or in confined spaces (narrow spaces) or only with considerable, time-consuming and the risk of injury-causing difficulties.
  • the invention specified in the characterizing part of claim 1 is based on the object of improving a ratchet wrench of the type mentioned at the outset in such a way that turning the nut is made easier, in particular in confined spaces that are difficult to access.
  • the nut can be actuated from the handle of the ratchet wrench, which is also in the worst case in the handling area.
  • the engagement of the engagement members in a return rotating ring takes place in a form-fitting manner in that the engagement members and the return rotating ring have pawls and return teeth or intermeshing teeth.
  • a turntable in the form of a ratchet sprocket or a return sprocket is used in the following, this should always be understood to mean that it is a partial sprocket necessarily interrupted at the mouth opening.
  • a handle 1 ends in a jaw-shaped head 2, in which a nut 3 is mounted, which has a mouth 4 and cylindrical lugs 5, which enclose a circular arc of more than a semicircle Mouth 6 of the head 2 are mounted and the nut 3 is secured against falling out in the axial direction by a ring of ratchet teeth 7 forming an enlarged radius.
  • a ring of ratchet teeth 7 engage in the head 2 of the ratchet wrench pawls 8 which are held in their locked position by means of spring elements 9.
  • This pair of ratchet teeth / pawls forms a ratchet. Since its teeth are self-locking, only a relatively small force needs to be exerted on the pawls 8 in order to move the small masses of the pawls 8 and to overcome the low frictional forces of their bearings.
  • Figure 1 shows that if there is only a small pivoting possibility for the handle 1, the assignment of the ratchet teeth 7 and the pawls 8 to each other enables a new snap-in already after an angle of about 10 degrees, because when the handle 1 is pivoted back in Clockwise not the pawl 8 in the adjacent tooth gap 10, 30 degrees away, but the pawl 8 'in the gap 10' between the ratchet teeth 7 'and 7 ⁇ , until where only a swivel path of about 10 degrees has to be covered. Accordingly, the ratchet wrench with its Nonius locking mechanism still performs screwing work in cases in which a conventional hexagon wrench is no longer able to grip, even if its jaw axis is inclined against that of the key arm.
  • a return ratchet pair comprising a push ratchet 11, 21, 23 and 40 and a pull ratchet 12, 22, 24 and 41 is movably mounted in the hollow ratchet wrench.
  • the ratchet pair 11/12, 21/22, 23/24 and 40/41 is assigned a return turntable arranged on the nut 3 in the form of a toothed ring with sawtooth-like teeth 13, 20, the orientation of which corresponds to that of the likewise sawtooth-like locking teeth 7 .
  • Pitch and possibly also largely the tooth shape can match in the return ring gear and in the ratchet ring gear, which has manufacturing advantages. In other cases, it is more advantageous to give the return ring gear a finer division, as a result of which the return pawls and thus the actuation of the arm 1 of the ratchet wrench can be rotated with even smaller travel paths.
  • the return teeth 13 are directed radially outward, the pawls 11, 12 of the fork-like, arranged on a slide 14 guided in the handle 1 of the ratchet wrench and held in a retracted position by a spring 15
  • Return pawls are resilient in themselves and are thereby pressed against the return teeth 13.
  • the pawl 11 When moving the pair of pawls 11/12 by pressing the control button 16 on the slide 14, the pawl 11 first comes into engagement with one of the return teeth 13 and rotates the nut 3 (in the illustration) counterclockwise, the locking teeth 7 being the nut 3 are rotated under the pawls 8 and the pawl 12 slides over the return teeth 13 lying in their engagement area.
  • the pair of pawls 11/12 is moved back under the action of the spring 15, the pawl 12 comes into engagement with return teeth 13 in its area and continues the rotation of the nut 3.
  • the return pawl pair 40/41 is designed as a rigid, but by means of an elastic intermediate member in the form of a leaf spring 42 resiliently held on a slide 43 pawl element, the under a cover 44 is movably guided on the top of the ratchet wrench.
  • the slide 43 is displaceable on a button 45, the retaining bolt 46 of which is guided in a T-shaped slot 47 in the cover 44.
  • the slider 43 is pressed forward on the button 45, the retaining bolt 46 being guided out of the central arm of the slot 47 into its transverse arm.
  • the slide 47 can be moved back and forth transversely to the longitudinal axis of the ratchet wrench 1, the pawls 40, 41 engaging in the backwoods 13 and rotating the nut 3 or sliding over the backwoods 13 during the return movement.
  • the spring 15 pulls the pair of pawls 11/12 and 40/41 back so far that the pawls 11, 12, 40, 41 come out of engagement with the return teeth 13. This ensures that the rotation of the nut 3 is not inhibited by the return ring gear during the screwing process.
  • the pair of pawls 11/12 is arranged between the two end plates 17 and 18 holding the nut 3 and the pawls 8 and uses as return teeth 13 areas of the pawls 7 not acted upon by the pawls 8 which have a lower tooth height in the case shown.
  • the pair of pawls 11/12 and 40/41 is arranged outside the end shields 17, 18 - the nut 3 has a separate one Return gear ring, the pawls 13 are also arranged on the outside of the bearing plate 17.
  • the ratchet wrench also has a cover 19 or 43, under which the return mechanism is mounted.
  • the return teeth 20 are arranged in the axial direction on the nut 3 - the push pawl 21 and the pull pawl 22 of a pair of return pawls which are fork-like in this case also spring in the direction of the axis of rotation of the nut 3 and pressed into engagement with the return teeth 20.
  • the two pawls 11, 12; 20, 21 and 40.41 of the pair of jacks moved in unison. 1 to 6 engages in a forward stroke caused by an external force, namely the operator, the pawl 11 and 21 behind a ratchet tooth 13 of the return ring gear and rotates the nut 3.
  • the force of the spring 15 effected return stroke engages the pawl 12 or 22 behind one of the return teeth 13 of the return ring gear and continues the rotation of the nut.
  • the other pawl slides back over the return teeth 13.
  • both pawls 40, 41 engage in the stroke - in the illustration: to the right - in the backwood teeth 13, in the stroke to the left they slide over the backwood teeth.
  • the two pawls 23 and 24 are at the ends of one on a pivot pin 25 rotatably mounted in the ratchet wrench 26 and are moved in opposite directions when pivoting the rocker.
  • the rocker 26 is pivotable by means of a slide 14 ', which is also articulated at a distance from the pivot pin 25 on the rocker 26 - the slide 14' can be moved on an arranged on the handle 1 button 16 '.
  • Tension springs 27 and 28 are attached to the pawls 23 and 24, the other ends of which are fastened in the ratchet wrench and which endeavor to press the pawls 23 and 24 into engagement with the pawls 13 of the return toothed ring.
  • the pawls pulling in the drawn starting position spring 28 is chosen so much stronger than the other spring 27 that it overcomes the force of this other spring, the rocker 26 and the slide 14 'pulls into the position shown.
  • both pawls 23 and 24 slide from the stops 29 and 30, fall under the action of the tension springs 27 and 28 in the return ring gear and when pivoting the rocker 26 rotate the nut 3 by an angular amount corresponding to the stroke of the pawls.
  • the slide 14', the rocker 26 and the pawls 23 and 24 in an idle stroke, in which both pawls over the return teeth 13 slide back into the drawn starting position. This process is repeated until the mouth 4 of the nut 3 coincides with the mouth 6 of the ratchet wrench.
  • the return turntable on the nut 3 is designed as a toothed ring 32 and the two engagement members as toothed wheels 33 and 34, both of which are in engagement with a third toothed wheel 35.
  • All three gears 33, 34 and 35 are mounted in a common carriage 36 which is displaceably guided between a bearing plate 17 and a cover 19 of the ratchet wrench, which is under load one of the gears 33 and 34 out of engagement with the ring gear 32 pulling spring 15 '.
  • the shaft 37 supporting the gear wheel 35 protrudes outwards through an elongated hole 38 in the cover 19 and carries there a disk 39 knurled on the circumference.
  • the slide 36 is pressed forward by pressure on the knurled disk 39 (for example with the thumb), the gears 33 and 34 coming into engagement with the ring gear 32. Then the nut 3 is rotated by turning the knurled disk 39 via the toothed wheels 33 and 34 until its mouth 4 coincides with the mouth 6 of the ratchet wrench.
  • a pair of engagement members is provided and that the two engagement members of this pair engage in regions of the return turntable that are spaced apart have, which is larger than the gap in the slewing ring, which is caused by the open mouth 4 of the nut 3. It is particularly expedient if the two engagement areas lie approximately opposite one another. As a result of the mouth 4 in the nut 3, the turntable must be interrupted - if this gap of the turntable is in the engagement area of one of the engagement members, further rotation of the nut 3 would no longer be possible, if not in this case the other engagement member in its area could engage in the turntable and continue turning the nut 3.
  • the spacing according to the invention of the engagement areas of the engagement members ensures that at least one engagement member can always be brought into engagement with the return turntable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
EP88117846A 1987-10-26 1988-10-26 Clé à cliquet Withdrawn EP0314106A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873736109 DE3736109C1 (de) 1987-10-26 1987-10-26 Ratschenschluessel
DE3736109 1987-10-26

Publications (2)

Publication Number Publication Date
EP0314106A2 true EP0314106A2 (fr) 1989-05-03
EP0314106A3 EP0314106A3 (fr) 1990-01-24

Family

ID=6339042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117846A Withdrawn EP0314106A3 (fr) 1987-10-26 1988-10-26 Clé à cliquet

Country Status (2)

Country Link
EP (1) EP0314106A3 (fr)
DE (1) DE3736109C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009015447A1 (de) * 2009-03-28 2010-09-30 Müller, Hans-Joachim Schrauben- und Ratschenringschlüssel mit integriertem Drehkraftverstärkergetriebe
IL293383A (en) * 2022-05-26 2023-12-01 Bencialu Ltd Wrench

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19528491C1 (de) * 1995-08-02 1997-02-20 Engelbert Gmeilbauer Krähenfuß-Leitungsstecknuß
DE102018112183B3 (de) * 2018-05-22 2019-08-29 Gerhard Bachthaler Ratschenschlüssel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE710248C (de) * 1938-01-01 1941-09-08 Josef Sieffert Schluessel zum Anziehen von UEberwurfmuttern
US2578686A (en) * 1945-04-27 1951-12-18 Tubing Appliance Co Inc Open-sided-socket ratchet wrench
SU724331A1 (ru) * 1977-01-25 1980-03-30 Miloserdov Viktor P Гаечный ключ
WO1983004208A1 (fr) * 1982-05-24 1983-12-08 Wallis Frederick A Cle a cliquet
WO1983004207A1 (fr) * 1982-05-27 1983-12-08 Dennis John Paul Ameliorations relatives a des cles a ecrous

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129710C2 (de) * 1981-07-22 1983-07-21 Kurt 1000 Berlin Grzanna "Ratschenschlüssel"
BE898741A (fr) * 1984-01-24 1984-07-24 Folie Jean Claude Clef plate a cliquet
DE3610508A1 (de) * 1986-03-15 1987-09-17 Kurt Grzanna Ratschenschluessel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE710248C (de) * 1938-01-01 1941-09-08 Josef Sieffert Schluessel zum Anziehen von UEberwurfmuttern
US2578686A (en) * 1945-04-27 1951-12-18 Tubing Appliance Co Inc Open-sided-socket ratchet wrench
SU724331A1 (ru) * 1977-01-25 1980-03-30 Miloserdov Viktor P Гаечный ключ
WO1983004208A1 (fr) * 1982-05-24 1983-12-08 Wallis Frederick A Cle a cliquet
WO1983004207A1 (fr) * 1982-05-27 1983-12-08 Dennis John Paul Ameliorations relatives a des cles a ecrous

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED, Woche C45, 17. Dezember 1980, Sektion P62, Nr. K8537, Derwent Publications Ltd, London, GB; & SU-A-724 331 (MILOSERDOV V P) 30-03-1980 1977 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009015447A1 (de) * 2009-03-28 2010-09-30 Müller, Hans-Joachim Schrauben- und Ratschenringschlüssel mit integriertem Drehkraftverstärkergetriebe
IL293383A (en) * 2022-05-26 2023-12-01 Bencialu Ltd Wrench

Also Published As

Publication number Publication date
DE3736109C1 (de) 1989-03-02
EP0314106A3 (fr) 1990-01-24

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