EP0413218A1 - Driving tool for sockets - Google Patents

Driving tool for sockets Download PDF

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Publication number
EP0413218A1
EP0413218A1 EP90114939A EP90114939A EP0413218A1 EP 0413218 A1 EP0413218 A1 EP 0413218A1 EP 90114939 A EP90114939 A EP 90114939A EP 90114939 A EP90114939 A EP 90114939A EP 0413218 A1 EP0413218 A1 EP 0413218A1
Authority
EP
European Patent Office
Prior art keywords
handle
tool
tool according
tool head
connecting 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
EP90114939A
Other languages
German (de)
French (fr)
Other versions
EP0413218B1 (en
Inventor
Karl Weidner
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.)
Adolf Wuerth GmbH and Co KG
Original Assignee
Adolf Wuerth GmbH and Co KG
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 Adolf Wuerth GmbH and Co KG filed Critical Adolf Wuerth GmbH and Co KG
Publication of EP0413218A1 publication Critical patent/EP0413218A1/en
Application granted granted Critical
Publication of EP0413218B1 publication Critical patent/EP0413218B1/en
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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B25G1/105—Handle constructions characterised by material or shape for screwdrivers, wrenches or spanners

Definitions

  • the invention relates to a drive tool for socket wrench inserts or the like.
  • ratchets or reversible ratchets. They serve, for example, to drive socket wrench inserts. Socket wrench inserts of different types and sizes can be connected to the drive tool, for example using a square socket. The tool can then be used to turn screws in both directions.
  • a plastic tool handle is attached to the end of the handle, which has a profiled shape. At the free end of the handle facing away from the handle, the handle has its largest diameter. Shortly before the opposite end facing the stem, there is another point with a large diameter.
  • a flat circumferential trough is formed, which is offset towards the free end and divides the length of the handle approximately in a ratio of 1: 2.
  • the surface of the handle is formed by circumferential ribs with circumferential grooves therebetween, so that when the handle is firmly gripped, pressure points form in the hands.
  • the longitudinal profile shape of the handle is very unfavorable for gripping by hand.
  • the invention has for its object to provide a drive tool for socket wrench inserts that is designed so that it can be better and easier to use and so the work results are improved.
  • the invention proposes a drive tool with the features of claim 1.
  • the handle While in the known ratchet the hand cannot grasp the handle properly due to its design, the handle, as proposed by the invention, is the tool in the hand. Therefore, the tool can be operated without fatigue even after long use.
  • the handle has a smooth surface. This reduces the stress on the hand without having an adverse effect on the grip. It must be taken into account here that with such a tool, in a large part of the application examples, a pure rotary movement around the axis of the socket wrench insert must be carried out, similar to a normal wrench.
  • the handle has a circular cross section. This is because it is not necessary for the user to exert a force about the longitudinal axis of the handle.
  • the handle has a circumferential depression or constriction in the region of its front quarter facing the handle, in which the cross section therefore has a minimum. This is used to place the thumb and / or index finger so that the grip is better in the hand. This deepening or constriction of the handle is particularly important if the tool is also to be used for a guiding function.
  • the drive tool has a freewheel in its tool head, in particular a switchable freewheel.
  • the tool can be pivoted back and forth in one direction without having to move it for screwing.
  • the tool head In order to be able to use drive tools of the type mentioned also in confined spaces, it is common for the tool head to be of flat cylindrical design, the connecting element being arranged on an end face of the flat cylinder.
  • an element that is as flat as possible is generally provided as the actuating element for the switching device of the freewheel on the side of the tool head opposite the connecting element.
  • a flat disk is known, the diameter of which is somewhat smaller than the diameter of the tool head, and which can be rotated around the axis of the connecting element by an angle of approximately 90 °. You can touch the very narrow surface, which is provided with corrugations.
  • this plate Due to the very narrow area, this plate can be rotated only very poorly, especially if one takes into account that the user may have damp or oil-smeared hands.
  • the invention proposes, to simplify the changeover, to give this plate the shape of a flat truncated cone with a knurled conical surface. In this way, the surface area on which the user can attack is increased without having to increase the overall height.
  • This measure of the special design of the switching element is proposed by the invention without regard to the shape of the handle, which is also proposed. It can also be used with conventional reversible ratchets that do not have the specially adapted handle.
  • flanks of the rotary plate are inclined by approximately 45 °.
  • the invention proposes to mount a rotatably mounted pressure plate on the side of the tool head opposite the connecting element, on which the user can then press in the illustrated case. Because of its rotatability, the pressure plate no longer rotates with respect to the hand, and there is no longer any danger of the freewheel being switched over unintentionally.
  • This feature proposed by the invention is also independent of the shape of the handle and also independent of the shape of the switching device.
  • the invention proposes to arrange or design the pressure plate so that it leaves the flanks of the switching rotary plate free so that access to these flanks is unimpeded.
  • the drive tool for socket wrench inserts shown in FIG. 1, also called ratchet or ratchet in technical terms, contains a tool head 11 with a laterally protruding connecting element 12 arranged thereon in the form of a square of standardized size, onto which a socket wrench insert, an extension or a cardan joint is attached can be.
  • a handle 13 which extends approximately perpendicular to the axis of the connecting element 12, is preferably connected in one piece to the tool head 11.
  • a handle is attached to the stem, which consists for example of plastic and is produced by spraying or in some other way and is attached to the stem 13.
  • the stem which consists for example of plastic and is produced by spraying or in some other way and is attached to the stem 13.
  • the handle is rotationally symmetrical and has the shape of two inverted truncated cones which are connected to one another at their bases. This point thus forms the point 15 of the largest diameter.
  • the point 15 of largest diameter is offset from the center of the length of the handle 14 towards the free end 16 of the handle and is at a distance from the free end 16 of the handle 14 which is approximately half the distance of the point 15 largest Diameter from the opposite handle end 17 of the handle. In other words, the location 15 of the largest diameter divides the length of the handle in a ratio of 1: 2. Because of this shape, the handle is particularly favorable in the hand, which has its largest inner width at this point.
  • the connecting element is fastened to the tool head 11 with the aid of a freewheel.
  • the connecting element 12 When the tool rotates around the axis of the connecting element Mentes 12 in one direction, the connecting element 12 is thus taken, while it is not taken in the opposite direction, provided there is a certain counter friction.
  • the handle shape as shown in FIG. 1 and later also in FIG. 2, is also useful for tools that do not have a free-wheel.
  • the tool shown in Fig. 1 has a freewheel, the direction of which can be switched. Instead, there are also tools in which the freewheel itself cannot be switched. In such tools, the change in the direction of rotation is achieved in that the connecting element 12 is pushed through the tool head, for example, so that it then protrudes on the other side.
  • the shape of the handle is also suitable in these cases.
  • a switchover plate 18 is provided for switching the freewheel, which is arranged on the opposite side of the tool head 11 facing away from the connecting element 12.
  • the tool head 11 itself is designed approximately as a flat cylinder, its lateral surface being slightly spherical.
  • the flat cylindrical shape is very useful for reasons of space.
  • the switching plate 18 should take up as little space as possible, and is therefore relatively flat.
  • the switchover plate is designed in the form of a flat truncated cone, the conical surface or flank 19 running at an angle of approximately 45 ° with respect to the cone axis and knurled or otherwise provided with a roughening.
  • the user engages on the flank 19 of the switching plate 18 and rotates it by a limited angle around the axis of the connecting element 12.
  • the oblique flank 19 increases the area on which the user can engage.
  • a further centrally arranged plate 20 is mounted on the tool head 11 and can be freely rotated relative to the tool head 11 about the axis of the connecting element 12.
  • the pressure plate 20 has a diameter which corresponds to the smaller diameter of the truncated cone of the switching plate 18. As a result, the edge 19 of the switching plate 18 remains accessible.
  • the user presses on the pressure plate 20 which, because of its free rotatability, then rotates relative to the pivoted tool head 11, but remains against the hand of the user. By pressing this plate 20, the friction is increased so that the freewheel is triggered even with smooth-running screws.
  • This type of improvement in the use of the tool is otherwise independent of the shape of the handle and the type of switching device of the freewheel. However, it is particularly useful in the case of changeover plates, since there is a risk of switching the freewheeling in the case of changeover plates without a rotatable pressure plate.
  • FIG. 2 shows a view of a modified embodiment of a handle 21 approximately on the actual scale. While in the embodiment of FIG. 1 the handle has the shape of two truncated cones, the shape of the handle 21 in the embodiment according to FIG. 2 is changed in that the handle 21 has a constriction 22 in the direction of its handle-side end 17. This constriction or circumferential trough is arranged approximately in the front quarter of the handle 21. It is used to insert the thumb and / or index finger.
  • the handle 21 differs from the handle 14 in that its cross-section is not round, but octagonal with rounded edges.
  • This form of handle is always recommended if the tool is also to be used for management work, whatever that It can be the case if a universal joint or only an extension is arranged between the tool head and the socket wrench.
  • the shape of the handle 21 which differs from the circular cross-sectional shape makes it easier to control the orientation of the tool.
  • FIG. 3 shows, partially in section, an embodiment of the tool head 11 that has been modified compared to FIG. 1.
  • the switchover plate 18, which is shown in section, has a central recess 23 opening on its outside, in which the pressure plate 24 is recessed.
  • the pressure plate protrudes only slightly or not at all over the top of the switching plate 18, so that the overall height of the tool head of the embodiment according to FIG. 3 is not increased by the additional pressure plate 24.
  • the flank 19 of the switching plate 18 remains completely free.

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  • 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)
  • Processing Of Terminals (AREA)

Abstract

In a driving tool for sockets, there is arranged at the end of the shaft a handle whose largest cross-section has a distance from the shaft end of the handle which is twice as great as the distance of the point of largest cross-section from the free end of the handle. <IMAGE>

Description

Die Erfindung betrifft ein Antriebswerkzeug für Steckschlüs­seleinsätze o.dgl..The invention relates to a drive tool for socket wrench inserts or the like.

Diese Werkzeuge werden in der Regel als Knarren oder auch Umschaltknarren bezeichnet. Sie dienen dazu, beispielsweise Steckschlüsseleinsätze drehanzutreiben. Steckschlüsselein­sätze unterschiedlicher Art und Größe können, beispielsweise über einen Vierkantansatz, mit dem Antriebswerkzeug verbun­den werden. Damit kann das Werkzeug dann zum Drehen von Schrauben, und zwar in beide Richtungen, verwendet werden.These tools are usually referred to as ratchets or reversible ratchets. They serve, for example, to drive socket wrench inserts. Socket wrench inserts of different types and sizes can be connected to the drive tool, for example using a square socket. The tool can then be used to turn screws in both directions.

Bei einer bekannten Umschaltknarre ist am Ende des Stiels ein Werkzeuggriff aus Kunststoff befestigt, der eine profi­lierte Form aufweist. An dem dem Stiel abgewandten freien Griffende weist der Griff seinen größten Durchmesser auf. Kurz vor dem gegenüberliegenden dem Stiel zugewandten Ende ist nochmals eine Stelle mit großem Durchmesser vorhanden.In a known reversible ratchet, a plastic tool handle is attached to the end of the handle, which has a profiled shape. At the free end of the handle facing away from the handle, the handle has its largest diameter. Shortly before the opposite end facing the stem, there is another point with a large diameter.

Zwischen beiden Stellen ist eine flache umlaufende Mulde gebildet, die in Richtung auf das freie Ende versetzt ist und die Länge des Griffs etwa in einem Verhältnis von 1:2 aufteilt. Die Oberfläche des Griffes ist von umlaufenden Rippen mit dazwischenliegenden umlaufenden Nuten gebildet, so daß sich bei festem Angreifen an dem Griff Druckstellen in den Händen bilden. Die Längsprofilform des Griffs ist für ein Angreifen mit der Hand sehr ungünstig.Between the two places, a flat circumferential trough is formed, which is offset towards the free end and divides the length of the handle approximately in a ratio of 1: 2. The surface of the handle is formed by circumferential ribs with circumferential grooves therebetween, so that when the handle is firmly gripped, pressure points form in the hands. The longitudinal profile shape of the handle is very unfavorable for gripping by hand.

Der Erfindung liegt die Aufgabe zugrunde, ein Antriebswerk­zeug für Steckschlüsseleinsätze zu schaffen, das so gestal­tet ist, daß es sich besser und leichter bedienen läßt und so die Arbeitsergebnisse verbessert werden.The invention has for its object to provide a drive tool for socket wrench inserts that is designed so that it can be better and easier to use and so the work results are improved.

Zur Lösung dieser Aufgabe schlägt die Erfindung ein An­triebswerkzeug mit den Merkmalen des Anspruchs 1 vor.To achieve this object, the invention proposes a drive tool with the features of claim 1.

Während bei der bekannten Knarre die Hand den Griff aufgrund von dessen Gestaltung nicht richtig erfassen kann, liegt bei dem Griff, wie er von der Erfindung vorgeschlagen wird, das Werkzeug richtig in der Hand. Daher läßt sich das Werkzeug auch bei längerem Gebrauch ohne Ermüdungen bedienen. In Wei­terbildung der Erfindung kann vorgesehen sein, daß der Griff eine glatte Oberfläche aufweist. Dadurch verringert sich die Beanspruchung der Hand, ohne daß dies nachteilige Einflüsse auf die Griffigkeit hat. Es ist hierbei zu berücksichtigen, daß mit einem derartigen Werkzeug bei einem großen Teil der Anwendungsbeispiele eine reine Drehbewegung um die Achse des Steckschlüsseleinsatzes ausgeführt werden muß, ähnlich wie bei einem normalen Schraubenschlüssel. Für diese normalen Fälle kann erfindungsgemäß vorgesehen sein, daß der Griff einen kreisrunden Querschnitt aufweist. Es ist nämlich nicht erforderlich, daß der Benutzer eine Kraft um die Längsachse des Stiels aufbringen muß.While in the known ratchet the hand cannot grasp the handle properly due to its design, the handle, as proposed by the invention, is the tool in the hand. Therefore, the tool can be operated without fatigue even after long use. In a further development of the invention it can be provided that the handle has a smooth surface. This reduces the stress on the hand without having an adverse effect on the grip. It must be taken into account here that with such a tool, in a large part of the application examples, a pure rotary movement around the axis of the socket wrench insert must be carried out, similar to a normal wrench. For these normal cases it can be provided according to the invention that the handle has a circular cross section. This is because it is not necessary for the user to exert a force about the longitudinal axis of the handle.

Es gibt jedoch auch Anwendungsfälle, in denen ein Winkelver­satz zwischen der Achse der zu verdrehenden Schraube und der Längsachse des Stiels und damit des Griffs vorhanden ist. Hierzu gibt es Ratschen, bei denen der Stiel kurz hinter dem Werkzeugkopf ein Gelenk aufweist, dessen Achse senkrecht zur Drehachse verläuft. Ebenfalls bekannt sind Steckschlüssel­einsätze mit Kardangelenken sowie einzelne Kardangelenke, die zwischen den Werkzeugkopf und den Steckschlüsseleinsatz, ggf. auch über eine Verlängerung, eingesetzt werden können. Bei diesen Anwendungsfällen muß die Hand, die das Werkzeug bedient, nicht nur eine Drehbewegung um die Achse der Schraube ausführen, sondern auch das Werkzeug führen. Für diese Anwendungsfälle kann erfindungsgemäß vorgesehen sein, daß der Griff einen mehrkantigen Querschnitt mit abgerunde­ten Kanten aufweist, wobei der Querschnitt des Griffs vor­zugsweise an allen Stellen gleiche Querabmessungen in senk­recht zueinander stehenden Richtungen aufweist.However, there are also applications in which there is an angular offset between the axis of the screw to be rotated and the longitudinal axis of the handle and thus of the handle. For this purpose there are ratchets in which the handle has a joint just behind the tool head, the axis of which is perpendicular to the axis of rotation. Socket wrench inserts with universal joints as well as individual universal joints which can be inserted between the tool head and the socket wrench insert, possibly also via an extension, are also known. In these applications, the hand that operates the tool must not only make a rotary movement about the axis of the screw, but must also guide the tool. For these applications, it can be provided according to the invention that the handle has a polygonal cross section with rounded edges, the cross section of the handle preferably having the same transverse dimensions in all directions in mutually perpendicular directions.

In weiterer Anpassung des Griffs an die mit dem Werkzeug durchzuführen den Aufgaben kann erfindungsgemäß vorgesehen sein, daß der Griff im Bereich seines dem Stiel zugewandten vorderen Viertels eine umlaufende Mulde bzw. Einschnürung aufweist, in der der Querschnitt also ein Minimum aufweist. Dies dient zur Anlage von Daumen und/oder Zeigefinger, so daß der Griff nochmals besser in der Hand liegt. Diese Ver­tiefung oder Einschnürung des Griffs ist besonders dann wichtig, wenn mit dem Werkzeug auch eine Führungsfunktion übernommen werden soll.In a further adaptation of the handle to the tasks to be carried out with the tool, it can be provided according to the invention that the handle has a circumferential depression or constriction in the region of its front quarter facing the handle, in which the cross section therefore has a minimum. This is used to place the thumb and / or index finger so that the grip is better in the hand. This deepening or constriction of the handle is particularly important if the tool is also to be used for a guiding function.

In Weiterbildung der Erfindung kann vorgesehen sein, daß das Antriebswerkzeug in seinem Werkzeugkopf einen Freilauf auf­weist, insbesondere einen umschaltbaren Freilauf. In diesem Fall kann das Werkzeug ohne Umsetzen zum Schrauben in eine Richtung ständig hin- und hergeschwenkt werden.In a further development of the invention it can be provided that the drive tool has a freewheel in its tool head, in particular a switchable freewheel. In this case, the tool can be pivoted back and forth in one direction without having to move it for screwing.

Um Antriebswerkzeuge der erwähnten Art auch in räumlich be­engten Stellen einsetzen zu können, ist es üblich, daß der Werkzeugkopf flachzylindrisch ausgebildet ist, wobei das Verbindungselement an einer Stirnseite des flachen Zylinders angeordnet ist. Um nun den Platzbedarf möglichst klein zu halten, ist als Betätigungselement für die Umschalteinrich­tung des Freilaufs in der Regel auf der dem Verbindungsele­ment gegenüberliegenden Seite des Werkzeugkopfs ein mög­lichst flaches Element vorgesehen. Bekannt ist hierfür eine flache Scheibe, deren Durchmesser etwas kleiner ist als der Durchmesser des Werkzeugkopfs, und die um die Achse des Ver­bindungselements um einen Winkel von etwa 90° verdreht wer­den kann. Zum Anfassen dient die sehr schmale Mantelfläche, die mit Riffelungen versehen ist. Aufgrund der sehr schmalen Fläche läßt sich diese Platte unter Umständen nur sehr schlecht verdrehen, insbesondere wenn man berücksichtigt, daß der Benutzer ggf. feuchte oder ölverschmierte Hände hat. Hier schlägt nun die Erfindung vor, um das Umstellen zu ver­einfachen, dieser Platte die Form eines flachen Kegelstumpfs mit einer gerändelten Kegelfläche zu geben. Auf diese Weise vergrößert sich die Fläche, an der der Benutzer angreifen kann, ohne daß sich die Bauhöhe zu vergrößern braucht. Diese Maßnahme der speziellen Ausgestaltung des Umschaltelements wird von der Erfindung im übrigen ohne Rücksicht auf die ebenfalls vorgeschlagene Form des Griffes vorgeschlagen. Sie kann auch bei herkömmlichen Umschaltknarren Anwendung fin­den, die nicht den speziell angepaßten Griff aufweisen.In order to be able to use drive tools of the type mentioned also in confined spaces, it is common for the tool head to be of flat cylindrical design, the connecting element being arranged on an end face of the flat cylinder. In order to keep the space requirement as small as possible, an element that is as flat as possible is generally provided as the actuating element for the switching device of the freewheel on the side of the tool head opposite the connecting element. For this purpose, a flat disk is known, the diameter of which is somewhat smaller than the diameter of the tool head, and which can be rotated around the axis of the connecting element by an angle of approximately 90 °. You can touch the very narrow surface, which is provided with corrugations. Due to the very narrow area, this plate can be rotated only very poorly, especially if one takes into account that the user may have damp or oil-smeared hands. Here, the invention proposes, to simplify the changeover, to give this plate the shape of a flat truncated cone with a knurled conical surface. In this way, the surface area on which the user can attack is increased without having to increase the overall height. This measure of the special design of the switching element is proposed by the invention without regard to the shape of the handle, which is also proposed. It can also be used with conventional reversible ratchets that do not have the specially adapted handle.

Insbesondere kann vorgesehen sein, daß die Flanken der Dreh­platte um etwa 45° geneigt verlaufen.In particular, it can be provided that the flanks of the rotary plate are inclined by approximately 45 °.

Bei Knarren mit einem Freilauf besteht das Problem, daß der Freilauf zu seiner Auslösung grundsätzlich ein gewisses Drehmoment benötigt. Wird nun eine Schraube in ein Gewinde geschraubt, so ist es möglich, daß sie sich zu Beginn des Schraubvorgangs so leicht drehen läßt, daß das zum Auslösen des Freilaufs erforderliche Drehmoment nicht erreicht wird. Es hat sich nun die Übung herausgestellt, um die Reibung etwas zu vergrößern, den Werkzeugkopf in Richtung auf die Schraube etwas anzudrücken. Dann wird die Reibung vergrößert und der Freil auf wirkt. Dies führt natürlich zu einer Be­lastung der Hand des Benutzers, da der Werkzeugkopf an der Hand ständig reibt. Erfolgt nun aber dieses Andrücken zu­sätzlich noch auf der Umschaltplatte, so kann dies dazu füh­ren, daß der Freilauf dabei ungewollt umgeschaltet wird. Daher schlägt die Erfindung zur weiteren Verbesserung des Antriebswerkzeugs vor, auf der dem Verbindungselement gegen­überliegenden Seite des Werkzeugkopfs eine drehbar gelagerte Druckplatte anzubringen, auf der der Benutzer dann in dem dargestellten Fall drücken kann. Aufgrund ihrer Drehbarkeit verdreht sich die Druckplatte dann nicht mehr gegenüber der Hand, und auch die Gefahr des unabsichtlichen Umschaltens des Freilaufs ist nicht mehr gegeben. Auch dieses von der Erfindung vorgeschlagene Merkmal ist unabhängig von der Form des Griffes und auch unabhängig von der Form der Umschalteinrichtung.The problem with ratchets with a freewheel is that the freewheel generally requires a certain torque to trigger it. If a screw is now screwed into a thread, it is possible that it can be turned so easily at the beginning of the screwing process that this can be triggered required torque of the freewheel is not reached. The exercise has now turned out to slightly increase the friction, to press the tool head slightly towards the screw. Then the friction is increased and the free effect. Of course, this leads to a strain on the user's hand, since the tool head constantly rubs against the hand. However, if this pressure is now additionally applied to the switchover plate, this can lead to the freewheel being switched unintentionally. Therefore, to further improve the drive tool, the invention proposes to mount a rotatably mounted pressure plate on the side of the tool head opposite the connecting element, on which the user can then press in the illustrated case. Because of its rotatability, the pressure plate no longer rotates with respect to the hand, and there is no longer any danger of the freewheel being switched over unintentionally. This feature proposed by the invention is also independent of the shape of the handle and also independent of the shape of the switching device.

Wird die Druckplatte in Zusammenhang mit einer Drehplatte für die Umschalteinrichtung verwendet, so schlägt die Erfin­dung vor, die Druckplatte so anzuordnen oder auszugestalten, daß sie die Flanken der Umschaltdrehplatte so frei läßt, daß der Zugang zu diesen Flanken ungehindert ist.If the pressure plate is used in connection with a rotary plate for the switching device, the invention proposes to arrange or design the pressure plate so that it leaves the flanks of the switching rotary plate free so that access to these flanks is unimpeded.

Weitere Merkmale, Einzelheiten und Vorzüge der Erfindung ergeben sich aus der folgenden Beschreibung bevorzugter Aus­führungsformen der Erfindung sowie anhand der Zeichnung. Hierbei zeigen:

  • Fig. 1 in verkleinertem Maßstab eine Seitenansicht eines von der Erfindung vorgeschlagenen An­triebswerkzeugs;
  • Fig. 2 eine Seitenansicht eines von der Erfindung vorgeschlagenen Griffes;
  • Fig. 3 in vergrößertem Maßstab eine Seitenansicht eines Werkzeugkopfes nach einer dritten Aus­führungsform der Erfindung.
Further features, details and advantages of the invention will become apparent from the following description of preferred embodiments of the invention and from the drawing. Here show:
  • Figure 1 is a side view, on a reduced scale, of a drive tool proposed by the invention;
  • 2 shows a side view of a handle proposed by the invention;
  • Fig. 3 is an enlarged side view of a tool head according to a third embodiment of the invention.

Das in Fig. 1 dargestellte Antriebswerkzeug für Steckschlüs­seleinsätze, im Fachsprachgebrauch auch Knarre oder Ratsche genannt, enthält einen Werkzeugkopf 11 mit einem daran an­geordneten, seitlich herausragenden Verbindungselement 12 in Form eines Vierkants genormter Größe, auf den ein Steck­schlüsseleinsatz, eine Verlängerung oder auch ein Kardange­lenk aufgesteckt werden kann. Mit dem Werkzeugkopf 11 vor­zugsweise einstückig verbunden ist ein Stiel 13, der sich etwa senkrecht zu der Achse des Verbindungselements 12 er­streckt. Am Ende des Stiels 13 ist ein Handgriff an dem Stiel befestigt, der beispielsweise aus Kunststoff besteht und durch Spritzen oder auf andere Weise hergestellt und an dem Stiel 13 befestigt ist. Der Griff ist im dargestellten Beispiel der Fig. 1 rotationssymmetrisch ausgebildet und weist die Form zweier umgedrehter Kegelstümpfe auf, die an ihren Basen miteinander verbunden sind. Diese Stelle bildet damit die Stelle 15 des größten Durchmessers. Die Stelle 15 größten Durchmessers ist gegenüber der Mitte der Länge des Griffes 14 zum freien Ende 16 des Griffes hin versetzt ange­ordnet und weist von dem freien Ende 16 des Griffs 14 einen Abstand auf, der etwa halb so groß ist wie der Abstand der Stelle 15 größten Durchmessers von dem gegenüberliegenden stielseitigen Ende 17 des Griffs. Anders ausgedrückt teilt die Stelle 15 des größten Durchmessers die Länge des Griffs im Verhältnis von 1:2 auf. Aufgrund dieser Formgebung liegt der Griff besonders günstig in der Hand, die an dieser Stel­le ihre größte Innenweite aufweist. Das Verbindungselement ist am Werkzeugkopf 11 mit Hilfe eines Freilaufs befestigt. Bei Drehung des Werkzeugs um die Achse des Verbindungsele­ mentes 12 in eine Richtung wird das Verbindungselement 12 also mitgenommen, während es in umgekehrter Richtung, sofern eine gewisse Gegenreibung vorhanden ist, nicht mitgenommen wird. Selbstverständlich ist die Grifform, wie sie in Fig. 1 und später auch in Fig. 2 dargestellt ist, auch bei Werkzeu­gen sinnvoll, die keinen Freilauf aufweisen.The drive tool for socket wrench inserts shown in FIG. 1, also called ratchet or ratchet in technical terms, contains a tool head 11 with a laterally protruding connecting element 12 arranged thereon in the form of a square of standardized size, onto which a socket wrench insert, an extension or a cardan joint is attached can be. A handle 13, which extends approximately perpendicular to the axis of the connecting element 12, is preferably connected in one piece to the tool head 11. At the end of the stem 13, a handle is attached to the stem, which consists for example of plastic and is produced by spraying or in some other way and is attached to the stem 13. In the example shown in FIG. 1, the handle is rotationally symmetrical and has the shape of two inverted truncated cones which are connected to one another at their bases. This point thus forms the point 15 of the largest diameter. The point 15 of largest diameter is offset from the center of the length of the handle 14 towards the free end 16 of the handle and is at a distance from the free end 16 of the handle 14 which is approximately half the distance of the point 15 largest Diameter from the opposite handle end 17 of the handle. In other words, the location 15 of the largest diameter divides the length of the handle in a ratio of 1: 2. Because of this shape, the handle is particularly favorable in the hand, which has its largest inner width at this point. The connecting element is fastened to the tool head 11 with the aid of a freewheel. When the tool rotates around the axis of the connecting element Mentes 12 in one direction, the connecting element 12 is thus taken, while it is not taken in the opposite direction, provided there is a certain counter friction. Of course, the handle shape, as shown in FIG. 1 and later also in FIG. 2, is also useful for tools that do not have a free-wheel.

Das in Fig. 1 dargestellte Werkzeug weist einen Freilauf auf, dessen Richtung umschaltbar ist. Es gibt statt dessen auch Werkzeuge, bei denen der Freilauf selbst nicht um­schaltbar ist. Bei solchen Werkzeugen wird die Änderung des Drehsinns dadurch erreicht, daß das Verbindungselement 12 beispielsweise durch den Werkzeugkopf hindurchgeschoben wird, so daß es dann auf der anderen Seite herausragt. Auch in diesen Fällen ist die Form des Griffs geeignet.The tool shown in Fig. 1 has a freewheel, the direction of which can be switched. Instead, there are also tools in which the freewheel itself cannot be switched. In such tools, the change in the direction of rotation is achieved in that the connecting element 12 is pushed through the tool head, for example, so that it then protrudes on the other side. The shape of the handle is also suitable in these cases.

Bei dem dargestellten Werkzeug mit umschaltbarem Freilauf ist zum Umschalten des Freilaufs eine Umschaltplatte 18 vor­gesehen, die auf der dem Verbindungselement 12 abgewandten gegen überliegenden Seite des Werkzeugkopfs 11 angeordnet ist. Der Werkzeugkopf 11 selbst ist etwa als Flachzylinder ausgebildet, wobei seine Mantelfläche leicht ballig ver­läuft. Die flachzylindrische Form ist aus Platzgründen sehr sinnvoll. Aus dem gleichen Grunde soll die Umschaltplatte 18 möglichst wenig Platz wegnehmen, sie ist daher relativ flach ausgebildet. Erfindungsgemäß ist die Umschaltplatte in Form eines flachen Kegelstumpfes ausgebildet, wobei die Kegel­fläche bzw. Flanke 19 etwa unter einem Winkel von 45° gegen über der Kegelachse verläuft und gerändelt oder sonstwie mit einer Aufrauhung versehen ist. Zum Umschalten des Freilaufs greift der Benutzer an der Flanke 19 der Umschaltplatte 18 an und verdreht diese um einen begrenzten Winkel um die Ach­se des Verbindungselements 12. Durch die schräg verlaufende Flanke 19 vergrößert sich die Fläche, an der der Benutzer angreifen kann.In the illustrated tool with a switchable freewheel, a switchover plate 18 is provided for switching the freewheel, which is arranged on the opposite side of the tool head 11 facing away from the connecting element 12. The tool head 11 itself is designed approximately as a flat cylinder, its lateral surface being slightly spherical. The flat cylindrical shape is very useful for reasons of space. For the same reason, the switching plate 18 should take up as little space as possible, and is therefore relatively flat. According to the invention, the switchover plate is designed in the form of a flat truncated cone, the conical surface or flank 19 running at an angle of approximately 45 ° with respect to the cone axis and knurled or otherwise provided with a roughening. To switch over the freewheel, the user engages on the flank 19 of the switching plate 18 and rotates it by a limited angle around the axis of the connecting element 12. The oblique flank 19 increases the area on which the user can engage.

Auf der gleichen Seite wie die Umschaltplatte 18 ist an dem Werkzeugkopf 11 eine weitere mittig angeordnete Platte 20 gelagert, die frei gegenüber dem Werkzeugkopf 11 um die Ach­se des Verbindungselements 12 verdreht werden kann. Die Druckplatte 20 weist einen Durchmesser auf, der dem kleine­ren Durchmesser des Kegelstumpfs der Umschaltplatte 18 ent­spricht. Dadurch bleibt die Flanke 19 der Umschaltplatte 18 zugänglich. Um bei einer sehr leichtgängigen Schraube den Freilauf auszulösen, drückt der Benutzer auf die Druckplatte 20, die dann aufgrund ihrer freien Drehbarkeit sich gegen­über dem verschwenkten Werkzeugkopf 11 verdreht, aber gegen­über der Hand des Benutzers stehen bleibt. Durch das Drücken auf diese Platte 20 wird die Reibung vergrößert, so daß auch bei leichtgängigen Schrauben der Freilauf ausgelöst wird. Diese Art der Verbesserung der Benutzung des Werkzeugs ist im übrigen unabhängig von der Form des Griffs und von der Art der Umschalteinrichtung des Freilaufs. Sie ist jedoch bei Umschaltplatten besonders sinnvoll, da bei Umschaltplat­ten ohne eine drehbare Druckplatte die Gefahr des Umschal­tens des Freilaufs gegeben ist.On the same side as the switching plate 18, a further centrally arranged plate 20 is mounted on the tool head 11 and can be freely rotated relative to the tool head 11 about the axis of the connecting element 12. The pressure plate 20 has a diameter which corresponds to the smaller diameter of the truncated cone of the switching plate 18. As a result, the edge 19 of the switching plate 18 remains accessible. In order to trigger the freewheeling in the case of a very smooth-running screw, the user presses on the pressure plate 20 which, because of its free rotatability, then rotates relative to the pivoted tool head 11, but remains against the hand of the user. By pressing this plate 20, the friction is increased so that the freewheel is triggered even with smooth-running screws. This type of improvement in the use of the tool is otherwise independent of the shape of the handle and the type of switching device of the freewheel. However, it is particularly useful in the case of changeover plates, since there is a risk of switching the freewheeling in the case of changeover plates without a rotatable pressure plate.

Fig. 2 zeigt etwa im tatsächlichen Maßstab eine Ansicht einer geänderten Ausführungsform eines Griffs 21. Während bei der Ausführungsform der Fig. 1 der Griff die Form zweier Kegelstümpfe aufweist, ist die Form des Griffs 21 bei der Ausführungsform nach Fig. 2 dadurch abgeändert, daß der Griff 21 in Richtung auf sein stielseitiges Ende 17 eine Einschnürung 22 aufweist. Diese Einschnürung oder umlaufende Mulde ist etwa im vorderen Viertel des Griffs 21 angeordnet. Sie dient zum Einlegen von Daumen und/oder Zeigefinger.FIG. 2 shows a view of a modified embodiment of a handle 21 approximately on the actual scale. While in the embodiment of FIG. 1 the handle has the shape of two truncated cones, the shape of the handle 21 in the embodiment according to FIG. 2 is changed in that the handle 21 has a constriction 22 in the direction of its handle-side end 17. This constriction or circumferential trough is arranged approximately in the front quarter of the handle 21. It is used to insert the thumb and / or index finger.

Zusätzlich weist der Griff 21 gegenüber dem Griff 14 den Unterschied auf, daß sein Querschnitt nicht rund, sondern achteckig mit abgerundeten Kanten ist. Diese Form des Griffs empfiehlt sich immer dann, wenn mit dem Werkzeug auch eine Führungsarbeit übernommen werden soll, was immer dann der Fall sein kann, wenn zwischen Werkzeugkopf und Steckschlüs­sel ein Kardangelenk oder auch nur eine Verlängerung ange­ordnet ist. Die von der kreisrunden Querschnittsform abwei­chende Form des Griffs 21 macht in diesem Fall eine Steue­rung der Orientierung des Werkzeugs einfacher.In addition, the handle 21 differs from the handle 14 in that its cross-section is not round, but octagonal with rounded edges. This form of handle is always recommended if the tool is also to be used for management work, whatever that It can be the case if a universal joint or only an extension is arranged between the tool head and the socket wrench. In this case, the shape of the handle 21 which differs from the circular cross-sectional shape makes it easier to control the orientation of the tool.

Fig. 3 zeigt, teilweise geschnitten, eine gegenüber der Fig. 1 geänderte Ausführungsform am Werkzeugkopf 11. Die Umschaltplatte 18, die im Schnitt dargestellt ist, weist eine zentrale auf ihrer Außenseite mündende Ausnehmung 23 auf, in der die Druckplatte 24 vertieft eingelassen ist. Die Druckplatte ragt über die Oberseite der Umschaltplatte 18 nur wenig oder gar nicht vor, so daß die Bauhöhe des Werk­zeugskopfes der Ausführungsform nach Fig. 3 durch die zu­sätzliche Druckplatte 24 nicht vergrößert wird. Auch hier bleibt die Flanke 19 der Umschaltplatte 18 vollkommen frei.FIG. 3 shows, partially in section, an embodiment of the tool head 11 that has been modified compared to FIG. 1. The switchover plate 18, which is shown in section, has a central recess 23 opening on its outside, in which the pressure plate 24 is recessed. The pressure plate protrudes only slightly or not at all over the top of the switching plate 18, so that the overall height of the tool head of the embodiment according to FIG. 3 is not increased by the additional pressure plate 24. Here, too, the flank 19 of the switching plate 18 remains completely free.

Claims (10)

1. Antriebswerkzeug für Steckschlüsseleinsätze o.dgl ., mit
1.1 einem Werkzeugkopf (11),
1.2 einem an dem Werkzeugkopf (11) angeordneten Verbindungselement (12) für den Einsatz,
1.3 einem an dem Werkzeugkopf (11) angeordneten Stiel (13),
1.3.1 der sich etwa senkrecht zu der Achse des Verbin­dungselements (12) erstreckt, und
1.4 einem an dem Ende des Stiels (13) angebrachten Griff (14), der
1.4.1 eine Stelle (15) größten Durchmessers aufweist, die
1.4.2 in Richtung auf das freie Ende (16) des Griffs (14) außermittig versetzt ist,
1.4.3 die Länge des Griffs im Verhältnis von etwa 1:2 aufteilt, und
1.4.4 zu deren beiden Seiten sich der Griff im Quer­schnitt verjüngt.
1. Drive tool for socket wrench inserts or the like, with
1.1 a tool head (11),
1.2 a connecting element (12) arranged on the tool head (11) for use,
1.3 a handle (13) arranged on the tool head (11),
1.3.1 which extends approximately perpendicular to the axis of the connecting element (12), and
1.4 a handle (14) attached to the end of the stem (13), the
1.4.1 has a point (15) of the largest diameter that
1.4.2 is offset off-center in the direction of the free end (16) of the handle (14),
1.4.3 divides the length of the handle in a ratio of about 1: 2, and
1.4.4 on both sides of the handle tapers in cross section.
2. Werkzeug nach Anspruch 1, bei dem der Griff (14, 21) eine glatte Oberfläche aufweist.2. Tool according to claim 1, wherein the handle (14, 21) has a smooth surface. 3. Werkzeug nach Anspruch 1 oder 2, bei dem der Griff (14) einen kreisrunden Querschnitt aufweist.3. Tool according to claim 1 or 2, wherein the handle (14) has a circular cross section. 4. Werkzeug nach Anspruch 1 oder 2, bei dem der Griff (21) einen mehrkantigen Querschnitt mit abgerundeten Kanten und vorzugsweise gleicher Breite und Dicke aufweist.4. Tool according to claim 1 or 2, wherein the handle (21) has a polygonal cross section with rounded edges and preferably the same width and thickness. 5. Werkzeug nach einem der vorhergehenden Ansprüche, bei dem der Griff (14, 21) im Bereich seines dem Stiel (13) zugewandten vorderen Viertels eine umlaufende Mulde bzw. Einschnürung (22) aufweist.5. Tool according to one of the preceding claims, in which the handle (14, 21) in the region of its front quarter facing the handle (13) has a circumferential depression or constriction (22). 6. Werkzeug nach einem der vorhergehenden Ansprüche, bei dem der Werkzeugkopf (11) einen vorzugsweise umschalt­baren Freilauf aufweist.6. Tool according to one of the preceding claims, wherein the tool head (11) has a preferably switchable freewheel. 7. Werkzeug nach Anspruch 6, bei dem zur Umschaltung des Freilaufs eine Drehplatte (18) am Werkzeugkopf (11) vorgesehen ist, die die Form eines flachen Kegelstumpfs mit gerändelter oder verrippter Kegelfläche aufweist.7. Tool according to claim 6, in which a rotary plate (18) is provided on the tool head (11) for switching the freewheel, which has the shape of a flat truncated cone with a knurled or ribbed conical surface. 8. Werkzeug nach Anspruch 7, bei dem die Flanke (19) der Drehplatte (18) um ca. 45° geneigt verläuft.8. Tool according to claim 7, wherein the flank (19) of the rotary plate (18) is inclined by approximately 45 °. 9. Werkzeug nach einem der vorhergehenden Ansprüche, bei dem auf der dem Verbindungselement (12) gegenüberlie­genden Seite des Werkzeugkopfs (11) ein drehbar gela­gertes Druckelement, insbesondere eine Druckplatte (20) angeordnet ist.9. Tool according to one of the preceding claims, in which a rotatably mounted pressure element, in particular a pressure plate (20), is arranged on the side of the tool head (11) opposite the connecting element (12). 10. Werkzeug nach Anspruch 9, bei dem das Druckelement die Flanke (19) der Umschaltdrehplatte (18) freiläßt.10. Tool according to claim 9, wherein the pressure element leaves the flank (19) of the switching rotary plate (18).
EP90114939A 1989-08-16 1990-08-03 Driving tool for sockets Expired - Lifetime EP0413218B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3926916A DE3926916A1 (en) 1989-08-16 1989-08-16 DRIVE TOOL FOR SOCKET INSERTS
DE3926916 1989-08-16

Publications (2)

Publication Number Publication Date
EP0413218A1 true EP0413218A1 (en) 1991-02-20
EP0413218B1 EP0413218B1 (en) 1994-07-06

Family

ID=6387156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90114939A Expired - Lifetime EP0413218B1 (en) 1989-08-16 1990-08-03 Driving tool for sockets

Country Status (5)

Country Link
EP (1) EP0413218B1 (en)
AT (1) ATE108116T1 (en)
DE (2) DE3926916A1 (en)
DK (1) DK0413218T3 (en)
ES (1) ES2056317T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998031510A1 (en) * 1997-01-17 1998-07-23 Willi Hahn Gmbh & Co. Kg Turning tool

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EP0062270A2 (en) * 1981-04-08 1982-10-13 Elora-Werkzeugfabrik GmbH Tool handle
EP0084794A2 (en) * 1982-01-26 1983-08-03 Hans Mesenhöller Ratchet
US4406186A (en) * 1981-05-29 1983-09-27 Gummow Stephen A Dual action ratchet wrench

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DE1628033A1 (en) * 1966-10-10 1971-01-28 Werner Fa Hermann Freewheeling key
US4317392A (en) * 1981-03-30 1982-03-02 Perry M. Lane Ratchet wrench
EP0062270A2 (en) * 1981-04-08 1982-10-13 Elora-Werkzeugfabrik GmbH Tool handle
US4406186A (en) * 1981-05-29 1983-09-27 Gummow Stephen A Dual action ratchet wrench
EP0084794A2 (en) * 1982-01-26 1983-08-03 Hans Mesenhöller Ratchet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998031510A1 (en) * 1997-01-17 1998-07-23 Willi Hahn Gmbh & Co. Kg Turning tool

Also Published As

Publication number Publication date
DE3926916A1 (en) 1991-02-21
DE59006348D1 (en) 1994-08-11
ATE108116T1 (en) 1994-07-15
EP0413218B1 (en) 1994-07-06
DK0413218T3 (en) 1994-11-07
ES2056317T3 (en) 1994-10-01

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