EP2210709A2 - Support base for power screwdrivers - Google Patents

Support base for power screwdrivers Download PDF

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Publication number
EP2210709A2
EP2210709A2 EP10000143A EP10000143A EP2210709A2 EP 2210709 A2 EP2210709 A2 EP 2210709A2 EP 10000143 A EP10000143 A EP 10000143A EP 10000143 A EP10000143 A EP 10000143A EP 2210709 A2 EP2210709 A2 EP 2210709A2
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EP
European Patent Office
Prior art keywords
support leg
tooth
housing
locking device
displaceable
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
EP10000143A
Other languages
German (de)
French (fr)
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EP2210709A3 (en
EP2210709B1 (en
Inventor
Marc Gareis
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.)
Losomat Schraubtechnik Neef GmbH
Loesomat Schraubtechnik Neef GmbH
Original Assignee
Losomat Schraubtechnik Neef GmbH
Loesomat Schraubtechnik Neef GmbH
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Application filed by Losomat Schraubtechnik Neef GmbH, Loesomat Schraubtechnik Neef GmbH filed Critical Losomat Schraubtechnik Neef GmbH
Publication of EP2210709A2 publication Critical patent/EP2210709A2/en
Publication of EP2210709A3 publication Critical patent/EP2210709A3/en
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Publication of EP2210709B1 publication Critical patent/EP2210709B1/en
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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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0078—Reaction arms

Definitions

  • the invention relates to a support foot for a power screwdriver for deriving the reaction force arising during the screw according to the preamble of claim 1.
  • a support leg is arranged on the housing, which can be brought into abutment against a stationary abutment in order to derive the reaction force arising during the screwing.
  • the support foot has, for example, a ring with a locking device, for example in the form of an internal toothing, which can be pushed onto a housing of the power wrench in different rotational positions and is held there in a rotationally fixed position.
  • the ring having the internal teeth has an axial length which is slightly shorter than the axial length of the external toothing on the housing of the power wrench, so as to allow a height compensation of the support leg on the housing and thus an adaptation to structural conditions and in particular to a to allow stationary abutment.
  • a power wrench with a housing which includes a drive device for an output shaft and a support leg for deriving the reaction force resulting from the screw, wherein the support leg engages with a toothing of the housing and can be pushed in different rotational positions on the toothing.
  • a blocking device is provided which allows a limited displacement of the support leg on the housing and blocks the removal of the support leg from the housing, wherein the support leg is displaceable in the region of limited displacement between an engagement position and an idle position.
  • the invention is therefore based on the object to provide a support foot for a power screwdriver, which is designed so that it is displaceable in the longitudinal direction of the housing to a large extent and at the same time in a defined manner both in the axial direction and in the rotational direction on the Housing of the power wrench is fixable.
  • a support foot for power screwdrivers with the features of claim 1.
  • the basic idea of the invention is to provide a support leg which is not only displaceable along the longitudinal direction of the housing to a great extent and can not be locked in any rotational position by the locking device is, but also in any position along the axial direction in a simple and easy to handle manner can be fixed.
  • the arresting device arranged on the support foot has a fixing device which can be actuated so that the support leg in the non-fixed state in the axial direction displaceable and in the fixed state at an arbitrary position of the arranged on the housing of the power screw locking device is fixed.
  • an advantageous embodiment provides that the arresting device arranged on the support foot is an internal toothing arranged in a ring, which engages in an external toothing arranged on the housing of the power screwdriver.
  • Such interlocking gears allow on the one hand a selectable in small angular increments rotatable locking, on the other hand they also allow a high torque absorption.
  • a very advantageous embodiment of the fixing device comprises a locking or fixing element arranged in a tooth of the internal toothing, which is mounted radially displaceable by actuating an actuating device in the radial direction of the ring and can be fixed in at least one position.
  • the locking element is partly over the tooth flanks of the tooth and thus allows a fixation of the internal toothing of the support leg on the outer toothing of the housing by a clamping effect formed thereby.
  • the locking element may be formed by a ball.
  • the ball is preferably made of a metal, in particular steel, aluminum, titanium or alloys of these metals, it may also consist of rubber, in particular hard rubber or a comparable material.
  • the actuating device preferably has a spring-loaded depressed displaceable in the axial direction of the hollow shaft Actuating pin on which has a backdrop in the longitudinal direction, and thus also in the direction of rotation of the power wrench, such that the ball in the non-actuated state protrudes beyond the tooth flanks of the tooth and slides back in the actuated state behind the tooth flanks of the tooth.
  • a spring-loaded depressed displaceable in the axial direction of the hollow shaft Actuating pin on which has a backdrop in the longitudinal direction, and thus also in the direction of rotation of the power wrench, such that the ball in the non-actuated state protrudes beyond the tooth flanks of the tooth and slides back in the actuated state behind the tooth flanks of the tooth.
  • the actuating pin is preferably manually operable, wherein it is arranged so that an operator simultaneously upon actuation, ie depression of the actuating pin makes an axial displacement of the support foot on the power wrench housing and releasing the spring-biased actuating pin immediate and immediate onset of the support foot on the power wrench triggers.
  • Another embodiment provides as a locking element before at least one positive and non-positive tooth that protrudes in its "fixing" at least partially in the radial direction and / or in the circumferential direction over the tooth flanks of the teeth of the internal teeth and is radially displaceable.
  • This tooth preferably also consists of a metal, in particular steel, aluminum, titanium or an alloy of metals or of rubber, in particular hard rubber or a comparable material.
  • the tooth is displaceable in the longitudinal direction according to a preferred embodiment, wherein here an actuating device may be provided, due to the actuation of the displacement in the longitudinal direction is made possible.
  • a support foot 100 for a power screwdriver (not shown) comprises at its angled lower end a stop 110, with which it is brought to a stationary (not shown) abutment to plant, to derive the reaction force resulting from the screws.
  • the support foot has a ring 120, in the interior of which an internal toothing 130 is arranged.
  • the internal toothing 130 engages in an outer toothing arranged on a housing of the power wrench (not shown).
  • the ring 120 has a smaller height and thus smaller axial length than the external toothing on the power screwdriver in order to rotate the support not only due to the teeth in different rotational positions, but also to be able to adjust in height adjustable to different structural conditions. Only by this adjustment is an optimal derivation of the resulting reaction force on screws to an abutment possible.
  • the support foot 100 is - in other words - in terms of its rotational position and in terms of its axial position, that is adjusted in height so that the stop 110 when tightening the screw or an opposing stop 110 'when loosening the screw optimally abut the abutment.
  • a fixation device 200 described in more detail below is provided in the ring 120 of the support leg, which comprises a fixing element in the form of a ball 205 and an actuating pin 210.
  • a spring 220 in an initial position in which the ball 205 protrudes over a tooth flank, biased (see Fig. 1 ).
  • the support leg 100 is held on the power wrench in a defined axial position.
  • an operator depresses the actuating pin 210, causing compression of the spring 220.
  • the ball 205 runs on a arranged on the outer peripheral surface of the actuating pin 210 gate 240 and moves in this way in Fig. 2 and Fig. 3 to the left, that is, out of the tooth flank.
  • the ball 205 is guided in a bore 206 extending in the ring 120.
  • the spring-biased actuating pin 210 thus represents an actuating device of the fixing device 200, such that the ball 205 in the non-actuated state of the actuating pin 210 over the tooth flanks of the tooth in which it is located, and in the actuated state slides back behind the tooth flanks of the tooth.
  • the ball 205 stands over both the tooth limiting tooth flanks over.
  • FIG. 4 to Fig. 6 A further embodiment of a support foot making use of the invention will be described, wherein like elements with the same reference numerals as in FIGS FIGS. 1 to 3 are referred to, so with respect to their description to the above reference is made.
  • a fixing in the form of a positive and non-positive tooth 305 for example, plastic, rubber, especially hard rubber, or a comparable material or a metal, such as steel, a non-ferrous metal, such as aluminum, titanium, or a Metal alloy exists.
  • this tooth 305 is radially displaceable by a (not shown) actuating element according to the above.
  • the positive and non-positive tooth 305 projects laterally beyond the tooth flanks of the remaining teeth of the internal toothing 130. It can be moved so that it springs back behind the tooth flanks of the internal teeth 130 and thus enables a release of the support leg on the corresponding external toothing. Instead of just one tooth, several teeth can be provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

The leg (100) has a locking device provided with a fixing device (200) that is operated such that the leg is fixed relocatably in a non-fixed condition in an axial direction and in a fixed condition at an arbitrary position of another locking device. The latter locking device is arranged at a housing of a power screwdriver, and the former locking device is designed as internal teeth that engage with external teeth arranged at the housing. A fixing element is designed as a ball (205) that is made of steel or nonferrous-metal plastic. The leg is provided with a tooth that is made of plastic, rubber, steel, aluminum, titanium or an alloy of steel, aluminum and titanium.

Description

Die Erfindung betrifft einen Stützfuß für einen Kraftschrauber zum Ableiten der beim Schrauben entstehendend Reaktionskraft nach dem Oberbegriff des Anspruchs 1.The invention relates to a support foot for a power screwdriver for deriving the reaction force arising during the screw according to the preamble of claim 1.

Bekannt sind manuelle, hydraulische, pneumatische oder elektrische Kraftschrauber zum Drehen von Schrauben. Bei derartigen Kraftschraubern ist am Gehäuse ein Stützfuß angeordnet, der in Anlage an ein ortsfestes Widerlager gebracht werden kann, um die beim Schrauben entstehende Reaktionskraft abzuleiten. Der Stützfuß weist beispielsweise einen Ring mit einer Arretiereinrichtung, beispielsweise in Form einer Innenverzahnung auf, die auf eine am Gehäuse angeordnete Verzahnung des Kraftschraubers in unterschiedlichen Drehpositionen aufschiebbar ist und dort in einer drehfesten Position gehalten wird. Der die Innenverzahnung aufweisende Ring weist dabei eine axiale Länge auf, die etwas kürzer ausgebildet ist als die axiale Länge der Außenverzahnung am Gehäuse des Kraftschraubers, um so einen Höhenausgleich des Stützfußes an dem Gehäuse zu ermöglichen und hiermit eine Anpassung an bauliche Gegebenheiten und insbesondere an ein ortsfestes Widerlager zu ermöglichen.Are known manual, hydraulic, pneumatic or electric power screwdriver for turning screws. In such power wrenches, a support leg is arranged on the housing, which can be brought into abutment against a stationary abutment in order to derive the reaction force arising during the screwing. The support foot has, for example, a ring with a locking device, for example in the form of an internal toothing, which can be pushed onto a housing of the power wrench in different rotational positions and is held there in a rotationally fixed position. The ring having the internal teeth has an axial length which is slightly shorter than the axial length of the external toothing on the housing of the power wrench, so as to allow a height compensation of the support leg on the housing and thus an adaptation to structural conditions and in particular to a to allow stationary abutment.

Aus der DE 203 01 759 U1 ist ein Kraftschrauber mit einem Gehäuse bekannt geworden, das eine Antriebsvorrichtung für eine Ausgangswelle enthält und einen Stützfuß zum Ableiten der beim Schrauben entstehenden Reaktionskraft, wobei der Stützfuß mit einer Verzahnung des Gehäuses zusammengreift und in unterschiedlichen Drehpositionen auf die Verzahnung aufschiebbar ist. Hierbei ist eine Blockiervorrichtung vorgesehen, die eine begrenzte Verschiebung des Stützfußes am Gehäuse zulässt und das Abziehen des Stützfußes vom Gehäuse blockiert, wobei der Stützfuß im Bereich der begrenzten Verschiebung zwischen einer Eingriffsposition und einer Leerlaufposition verschiebbar ist.From the DE 203 01 759 U1 is a power wrench with a housing has become known, which includes a drive device for an output shaft and a support leg for deriving the reaction force resulting from the screw, wherein the support leg engages with a toothing of the housing and can be pushed in different rotational positions on the toothing. Here, a blocking device is provided which allows a limited displacement of the support leg on the housing and blocks the removal of the support leg from the housing, wherein the support leg is displaceable in the region of limited displacement between an engagement position and an idle position.

Bei diesem Kraftschrauber ist eine Blockiervorrichtung erforderlich, um das Abziehen des Stützfußes vom Gehäuse zu blockieren. Zwar ist eine begrenzte Verschiebung des Stützfußes in Axialrichtung möglich, diese Verschiebung ist jedoch nur geringfügig, sodass eine Anpassung an verschiedene bauliche Gegebenheiten in vielen Fällen nicht möglich ist.In this power wrench a blocking device is required to block the removal of the support leg from the housing. Although a limited displacement of the support leg in the axial direction is possible, but this shift is only slightly, so that adaptation to different structural conditions in many cases is not possible.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Stützfuß für einen Kraftschrauber zu vermitteln, welcher so ausgebildet ist, dass er in Längsrichtung des Gehäuses in weitem Umfang verschiebbar ist und gleichzeitig auf einfache Weise in einer sowohl in Axialrichtung als auch in Drehrichtung definierten Position an dem Gehäuse des Kraftschraubers fixierbar ist.The invention is therefore based on the object to provide a support foot for a power screwdriver, which is designed so that it is displaceable in the longitudinal direction of the housing to a large extent and at the same time in a defined manner both in the axial direction and in the rotational direction on the Housing of the power wrench is fixable.

Diese Aufgabe wird gelöst durch einen Stützfuß für Kraftschrauber mit den Merkmalen des Anspruchs 1. Grundidee der Erfindung ist es, einen Stützfuß bereitzustellen, der nicht nur in weitem Umfang entlang der Längsrichtung des Gehäuses verschiebbar ist und dabei nicht nur in beliebigen Drehpositionen durch die Arretiereinrichtung arretierbar ist, sondern auch in beliebigen Positionen entlang der Axialrichtung auf einfache und einfach handhabbare Weise fixierbar ist. Dies wird dadurch erreicht, dass die an dem Stützfuß angeordnete Arretiereinrichtung eine Fixiereinrichtung aufweist, die so betätigbar ist, dass der Stützfuß im nicht fixierten Zustand in Axialrichtung verschieblich und im fixierten Zustand an einer beliebigen Stelle der an dem Gehäuse des Kraftschraubers angeordneten Arretiereinrichtung fixierbar ist.This object is achieved by a support foot for power screwdrivers with the features of claim 1. The basic idea of the invention is to provide a support leg which is not only displaceable along the longitudinal direction of the housing to a great extent and can not be locked in any rotational position by the locking device is, but also in any position along the axial direction in a simple and easy to handle manner can be fixed. This is achieved in that the arresting device arranged on the support foot has a fixing device which can be actuated so that the support leg in the non-fixed state in the axial direction displaceable and in the fixed state at an arbitrary position of the arranged on the housing of the power screw locking device is fixed.

Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des in dem unabhängigen Anspruch angegebenen Stützfußes möglich.The measures listed in the dependent claims advantageous refinements and improvements of the supportive foot specified in the independent claim are possible.

So sieht eine vorteilhafte Ausgestaltung vor, dass die an dem Stützfuß angeordnete Arretiereinrichtung eine in einem Ring angeordnete Innenverzahnung ist, die in eine am Gehäuse des Kraftschraubers angeordnete Außenverzahnung eingreift. Solche ineinandergreifende Verzahnungen erlauben zum einen eine in kleinen Winkelschritten wählbare drehfeste Arretierung, zum anderen ermöglichen sie gleichzeitig eine hohe Drehmomentaufnahme.Thus, an advantageous embodiment provides that the arresting device arranged on the support foot is an internal toothing arranged in a ring, which engages in an external toothing arranged on the housing of the power screwdriver. Such interlocking gears allow on the one hand a selectable in small angular increments rotatable locking, on the other hand they also allow a high torque absorption.

Eine sehr vorteilhafte Ausgestaltung der Fixiereinrichtung umfasst ein in einem Zahn der Innenverzahnung angeordnetes Feststell- oder Fixierelement, das durch Betätigen einer Betätigungseinrichtung in Radialrichtung des Rings radial verschieblich gelagert ist und in wenigstens einer Position fixierbar ist. In dieser Position steht das Feststellelement teilweise über die Zahnflanken des Zahnes über und ermöglicht so eine Fixierung der Innenverzahnung des Stützfußes an der Außenverzahnung des Gehäuses durch eine dadurch ausgebildete Klemmwirkung.A very advantageous embodiment of the fixing device comprises a locking or fixing element arranged in a tooth of the internal toothing, which is mounted radially displaceable by actuating an actuating device in the radial direction of the ring and can be fixed in at least one position. In this position, the locking element is partly over the tooth flanks of the tooth and thus allows a fixation of the internal toothing of the support leg on the outer toothing of the housing by a clamping effect formed thereby.

Das Feststellelement kann durch eine Kugel gebildet sein. Die Kugel besteht bevorzugt aus einem Metall, insbesondere Stahl, Aluminium, Titan oder Legierungen dieser Metalle, sie kann auch aus Gummi, insbesondere Hartgummi oder einem vergleichbaren Material bestehen.The locking element may be formed by a ball. The ball is preferably made of a metal, in particular steel, aluminum, titanium or alloys of these metals, it may also consist of rubber, in particular hard rubber or a comparable material.

Die Betätigungseinrichtung weist vorzugsweise einen in Axialrichtung der Hohlwelle verschieblichen, federvorgespannt niedergedrückten Betätigungsstift auf, der in Längsrichtung, und damit auch in Drehrichtung des Kraftschraubers eine Kulisse aufweist, derart, dass die Kugel im nicht betätigten Zustand über die Zahnflanken des Zahns übersteht und im betätigten Zustand hinter die Zahnflanken des Zahns zurückgleitet. Hierdurch kann zwischen der fixierten und der nicht fixierten Position des Stützfußes an dem Kraftschrauber durch Betätigen des Betätigungsstifts in Form von Niederdrücken beliebig gewählt werden.The actuating device preferably has a spring-loaded depressed displaceable in the axial direction of the hollow shaft Actuating pin on which has a backdrop in the longitudinal direction, and thus also in the direction of rotation of the power wrench, such that the ball in the non-actuated state protrudes beyond the tooth flanks of the tooth and slides back in the actuated state behind the tooth flanks of the tooth. In this way, can be arbitrarily selected between the fixed and the unfixed position of the support foot on the power screwdriver by pressing the actuating pin in the form of depressions.

Der Betätigungsstift ist dabei bevorzugt manuell betätigbar, wobei er so angeordnet ist, dass eine Bedienungsperson bei Betätigen, also Niederdrücken des Betätigungsstiftes gleichzeitig eine Axialverschiebung des Stützfußes an dem Kraftschraubergehäuse vornimmt und durch Loslassen des federvorgespannten Betätigungsstiftes eine unmittelbare und sofort einsetzende Arretierung des Stützfußes an dem Kraftschrauber auslöst.The actuating pin is preferably manually operable, wherein it is arranged so that an operator simultaneously upon actuation, ie depression of the actuating pin makes an axial displacement of the support foot on the power wrench housing and releasing the spring-biased actuating pin immediate and immediate onset of the support foot on the power wrench triggers.

Eine andere Ausgestaltung sieht als Feststellelement mindestens einen form- und kraftschlüssigen Zahn vor, der in seiner "Fixierposition" wenigstens teilweise in Radialrichtung und/oder in Umfangsrichtung über die Zahnflanken der Zähne der Innenverzahnung übersteht und radial verschieblich ist. Dieser Zahn besteht vorzugsweise ebenfalls aus einem Metall, insbesondere Stahl, Aluminium, Titan oder einer Legierung von Metallen oder aus Gummi, insbesondere Hartgummi oder einem vergleichbaren Material.Another embodiment provides as a locking element before at least one positive and non-positive tooth that protrudes in its "fixing" at least partially in the radial direction and / or in the circumferential direction over the tooth flanks of the teeth of the internal teeth and is radially displaceable. This tooth preferably also consists of a metal, in particular steel, aluminum, titanium or an alloy of metals or of rubber, in particular hard rubber or a comparable material.

Der Zahn ist gemäß einer bevorzugten Ausführungsform in Längsrichtung verschieblich, wobei hier eine Betätigungseinrichtung vorgesehen sein kann, aufgrund deren Betätigung die Verschiebung in Längsrichtung ermöglicht wird.The tooth is displaceable in the longitudinal direction according to a preferred embodiment, wherein here an actuating device may be provided, due to the actuation of the displacement in the longitudinal direction is made possible.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.

Es zeigen:

Fig. 1
eine isometrische Ansicht einer ersten Ausführungsform eines von der Erfindung Gebrauch machenden Stützfußes;
Fig. 2
eine Schnittansicht des Stützfußes in Fig. 1;
Fig. 3
eine Ausschnittvergrößerung der Schnittansicht gemäß Fig. 2;
Fig. 4
eine isometrische Ansicht einer weiteren Ausführungsform eines von der Erfindung Gebrauch machenden Stützfußes;
Fig. 5
eine Draufsicht auf den in Fig. 4 dargestellten Stützfuß und
Fig. 6
eine teilweise geschnittene Seitenansicht des in Fig. 4 und Fig. 5 dargestellten Stützfußes.
Show it:
Fig. 1
an isometric view of a first embodiment of a make use of the invention support leg;
Fig. 2
a sectional view of the support foot in Fig. 1 ;
Fig. 3
a detail enlargement of the sectional view according to Fig. 2 ;
Fig. 4
an isometric view of a further embodiment of a support foot making use of the invention;
Fig. 5
a top view of the in Fig. 4 illustrated support foot and
Fig. 6
a partially sectioned side view of the in Fig. 4 and Fig. 5 illustrated support foot.

Ein Stützfuß 100 für einen (nicht dargestellten) Kraftschrauber umfasst an seinem abgewinkelten unteren Ende einen Anschlag 110, mit dem er an ein ortsfestes (nicht dargestelltes) Widerlager zu Anlage gebracht wird, um die beim Schrauben entstehende Reaktionskraft abzuleiten.A support foot 100 for a power screwdriver (not shown) comprises at its angled lower end a stop 110, with which it is brought to a stationary (not shown) abutment to plant, to derive the reaction force resulting from the screws.

Im oberen Bereich weist der Stützfuß einen Ring 120 auf, in dessen Innerem eine Innenverzahnung 130 angeordnet ist. Die Innenverzahnung 130 greift in eine an einem Gehäuse des Kraftschraubers angeordnete Außenverzahnung ein (nicht dargestellt). Dabei weist der Ring 120 eine geringere Höhe und damit kleinere axiale Länge auf als die Außenverzahnung am Kraftschrauber, um den Stützfuß nicht nur aufgrund der Verzahnung in verschiedenen Drehpositionen drehfest, sondern insbesondere auch höhenverschiebbar an verschiedene bauliche Gegebenheiten anpassen zu können. Nur durch diese Anpassung ist eine optimale Ableitung der beim Schrauben entstehenden Reaktionskraft an ein Widerlager möglich. Der Stützfuß 100 wird - anders ausgedrückt - hinsichtlich seiner Drehposition und hinsichtlich seiner Axialposition, das heißt hinsichtlich seiner Höhe so verstellt, dass der Anschlag 110 beim Festziehen der Schraube oder ein diesem gegenüberliegender Anschlag 110' beim Lösen der Schraube optimal am Widerlager anliegen.In the upper area, the support foot has a ring 120, in the interior of which an internal toothing 130 is arranged. The internal toothing 130 engages in an outer toothing arranged on a housing of the power wrench (not shown). In this case, the ring 120 has a smaller height and thus smaller axial length than the external toothing on the power screwdriver in order to rotate the support not only due to the teeth in different rotational positions, but also to be able to adjust in height adjustable to different structural conditions. Only by this adjustment is an optimal derivation of the resulting reaction force on screws to an abutment possible. The support foot 100 is - in other words - in terms of its rotational position and in terms of its axial position, that is adjusted in height so that the stop 110 when tightening the screw or an opposing stop 110 'when loosening the screw optimally abut the abutment.

Um nun den Stützfuß in Axialrichtung verschieben zu können und gleichzeitig an einer gewünschten Position fixieren zu können, ist in dem Ring 120 des Stützfußes eine nachfolgend noch näher beschriebene Fixiereinrichtung 200 vorgesehen, die ein Fixierelement in Form einer Kugel 205 und einen Betätigungsstift 210 umfasst.In order to be able to move the support leg in the axial direction and at the same time be able to fix it in a desired position, a fixation device 200 described in more detail below is provided in the ring 120 of the support leg, which comprises a fixing element in the form of a ball 205 and an actuating pin 210.

Wie in Fig. 2 und Fig. 3 dargestellt ist, ist der in einer entsprechenden Bohrung verschieblich geführte Betätigungsstift 210 durch eine Feder 220 in einer Ausgangsposition, in der die Kugel 205 über eine Zahnflanke vorspringt, vorgespannt (vergleiche Fig. 1). In dieser Position wird der Stützfuß 100 an dem Kraftschrauber in einer definierten axialen Position gehalten. Zum Verschieben des Stützfußes 100 in Axialrichtung drückt eine Bedienungsperson den Betätigungsstift 210 nieder, wodurch eine Komprimierung der Feder 220 bewirkt wird. Dabei läuft die Kugel 205 auf eine an der äußeren Umfangsfläche des Betätigungsstiftes 210 angeordneten Kulisse 240 ab und bewegt sich auf diese Weise in Fig. 2 und Fig. 3 nach links, das heißt aus der Zahnflanke heraus. Hierzu ist die Kugel 205 in einer in dem Ring 120 verlaufenden Bohrung 206 geführt.As in Fig. 2 and Fig. 3 is shown, the slidably guided in a corresponding bore actuating pin 210 by a spring 220 in an initial position in which the ball 205 protrudes over a tooth flank, biased (see Fig. 1 ). In this position, the support leg 100 is held on the power wrench in a defined axial position. To displace the support leg 100 in the axial direction, an operator depresses the actuating pin 210, causing compression of the spring 220. In this case, the ball 205 runs on a arranged on the outer peripheral surface of the actuating pin 210 gate 240 and moves in this way in Fig. 2 and Fig. 3 to the left, that is, out of the tooth flank. For this purpose, the ball 205 is guided in a bore 206 extending in the ring 120.

Der federvorgespannte Betätigungsstift 210 stellt also eine Betätigungseinrichtung der Fixiereinrichtung 200 dar, derart, dass die Kugel 205 im nicht betätigten Zustand des Betätigungsstiftes 210 über die Zahnflanken des Zahns, in dem sie angeordnet ist, übersteht und im betätigten Zustand hinter die Zahnflanken des Zahns zurückgleitet. Die Kugel 205 steht dabei über beide den Zahn begrenzenden Zahnflanken über. An dieser Stelle ist zu bemerken, dass es rein prinzipiell auch möglich wäre, die Kugel 205 nicht in einem Zahn, sondern in dem Zwischenraum zwischen zwei Zähnen am Zahngrund anzuordnen, derart, dass sie im fixierten Zustand geringfügig über den Zahngrund übersteht und im nicht fixierten Zustand hinter den Zahngrund zurückspringt. Auch hierdurch wäre eine Fixierung des Stützfußes 100 an dem Gehäuse des Kraftschraubers möglich. Versuche haben jedoch gezeigt, dass die Anordnung der Kugel 205 in dem Zahn und das Vorspringen der Kugel 205 über die Zahnflanken im fixierten Zustand und das Zurückspringen der Kugel 205 hinter die Zahnflanken im nicht fixierten Zustand eine besonders optimale Fixierung des Stützfußes 100 an dem Kraftschrauber ermöglichen.The spring-biased actuating pin 210 thus represents an actuating device of the fixing device 200, such that the ball 205 in the non-actuated state of the actuating pin 210 over the tooth flanks of the tooth in which it is located, and in the actuated state slides back behind the tooth flanks of the tooth. The ball 205 stands over both the tooth limiting tooth flanks over. At this point, it should be noted that it would be possible in principle in principle, not to arrange the ball 205 in a tooth, but in the space between two teeth on the tooth base, such that it slightly protrudes in the fixed state on the tooth base and in the unfixed Condition jumps back behind the tooth base. Also, this would allow a fixation of the support leg 100 to the housing of the power wrench. tries However, have shown that the arrangement of the ball 205 in the tooth and the projection of the ball 205 on the tooth flanks in the fixed state and the spring back of the ball 205 behind the tooth flanks in the unfixed state allow a particularly optimal fixation of the support foot 100 to the power screwdriver.

In Verbindung mit Fig. 4 bis Fig. 6 wird eine weitere Ausführungsform eines von der Erfindung Gebrauch machenden Stützfußes beschrieben, wobei gleiche Elemente mit den gleichen Bezugszeichen wie in den Figuren 1 bis 3 bezeichnet sind, sodass bezüglich deren Beschreibung auf das Vorstehende Bezug genommen wird. Im Unterschied zu dem in Fig. 1 bis Fig. 3 dargestellten Stützfußes weist der in Fig. 4 bis Fig. 6 dargestellte Stützfuß ein Fixierelement in Form eines form- und kraftschlüssigen Zahnes 305 auf, der beispielsweise aus Kunststoff, Gummi, insbesondere Hartgummi, oder einem vergleichbaren Material oder auch aus einem Metall, beispielsweise Stahl, einem Nichteisen-Metall, beispielsweise Aluminium, Titan, oder einer Metalllegierung besteht. Auch dieser Zahn 305 ist durch ein (nicht dargestelltes) Betätigungselement entsprechend dem Vorbeschriebenen radial verschiebbar. Der form- und kraftschlüssige Zahn 305 steht seitlich über die Zahnflanken der übrigen Zähne der Innenverzahnung 130 über. Er kann so verschoben werden, dass er hinter die Zahnflanken der Innenverzahnung 130 zurückspringt und so ein Lösen des Stützfußes an der korrespondierenden Außenverzahnung ermöglicht. Statt nur eines Zahnes können auch mehrere Zähne vorgesehen sein.Combined with Fig. 4 to Fig. 6 A further embodiment of a support foot making use of the invention will be described, wherein like elements with the same reference numerals as in FIGS FIGS. 1 to 3 are referred to, so with respect to their description to the above reference is made. Unlike the in Fig. 1 to Fig. 3 illustrated support foot has the in Fig. 4 to Fig. 6 illustrated support a fixing in the form of a positive and non-positive tooth 305, for example, plastic, rubber, especially hard rubber, or a comparable material or a metal, such as steel, a non-ferrous metal, such as aluminum, titanium, or a Metal alloy exists. Also, this tooth 305 is radially displaceable by a (not shown) actuating element according to the above. The positive and non-positive tooth 305 projects laterally beyond the tooth flanks of the remaining teeth of the internal toothing 130. It can be moved so that it springs back behind the tooth flanks of the internal teeth 130 and thus enables a release of the support leg on the corresponding external toothing. Instead of just one tooth, several teeth can be provided.

Claims (9)

Stützfuß (100) für Kraftschrauber zum Ableiten der beim Schrauben entstehenden Reaktionskraft mit einer an dem Stützfuß (100) angeordneten Arretiereinrichtung (130), die mit einer an einem Gehäuse des Kraftschraubers angeordneten Arretiereinrichtung so zusammenwirkt, dass der Stützfuß (100) drehfest, aber gleichzeitig in Axialrichtung verschieblich befestigbar ist, dadurch gekennzeichnet, dass die an dem Stützfuß (100) angeordnete Arretiereinrichtung (130) eine Fixiereinrichtung (200) aufweist, die so betätigbar ist, dass der Stützfuß (100) im nicht fixierten Zustand in Axialrichtung verschieblich und im fixierten Zustand an einer beliebigen Stelle der an dem Gehäuse des Kraftschraubers angeordneten Arretiereinrichtung fixierbar ist.Support foot (100) for power screwdrivers for deriving the reaction force arising during the screwing with a locking device (130) arranged on the support leg (100), which cooperates with a locking device arranged on a housing of the power wrench such that the support leg (100) rotatably but simultaneously can be fastened displaceably in the axial direction, characterized in that the locking device (130) arranged on the support leg (100) has a fixing device (200) which can be actuated such that the support leg (100) is displaceable in the axial direction in the unfixed state and fixed Condition at any point of the arranged on the housing of the power screw locking device is fixed. Stützfuß (100) nach Anspruch 1, dadurch gekennzeichnet, dass die an dem Stützfuß (100) angeordnete Arretiereinrichtung eine in einem einen Ring (120) angeordnete Innenverzahnung (130) ist, die in eine am Gehäuse des Kraftschraubers angeordnete Außenverzahnung eingreift.Support leg (100) according to claim 1, characterized in that on the support leg (100) arranged locking means in a ring (120) arranged internal toothing (130) which engages in an arranged on the housing of the power wrench outer teeth. Stützfuß (100) nach Anspruch 2, dadurch gekennzeichnet, dass die Fixiereinrichtung durch ein in oder an einem Zahn der Innenverzahnung (130) angeordnetes Feststellelement umfasst, das in Radialrichtung des Ringes (120) radial verschieblich gelagert und in einer beliebigen Position fixierbar ist.Support leg (100) according to claim 2, characterized in that the fixing device comprises by a in or on a tooth of the internal toothing (130) arranged locking element which is radially displaceable in the radial direction of the ring (120) and fixable in any position. Stützfuß (100) nach Anspruch 3, dadurch gekennzeichnet, dass das Feststellelement eine Kugel (205) ist.Support leg (100) according to claim 3, characterized in that the locking element is a ball (205). Stützfuß (100) nach Anspruch 4, dadurch gekennzeichnet, dass die Kugel aus einem der folgenden Materialien besteht: Stahl, Nichteisen-(NE)-Metall, Kunststoff.Support leg (100) according to claim 4, characterized in that the ball consists of one of the following materials: steel, non-ferrous (NE) metal, plastic. Stützfuß (100) nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass eine Betätigungseinrichtung vorgesehen ist, die einen in Axialrichtung des Rings (120) verschieblichen, federvorgespannten Betätigungsstift (210) umfasst, der eine Kulisse (240) aufweist derart, dass die Kugel im nicht betätigten Zustand über die Zahnflanken des Zahns seitlich übersteht und im betätigten Zustand hinter die Zahnflanken des Zahns zurückgleitet.Support leg (100) according to one of claims 3 to 5, characterized in that an actuating device is provided which comprises a displaceable in the axial direction of the ring (120), spring-biased actuating pin (210) having a link (240) such that the Ball in the non-actuated state protrudes laterally beyond the tooth flanks of the tooth and slides back behind the tooth flanks of the tooth in the actuated state. Stützfuß (100) nach Anspruch 3, dadurch gekennzeichnet, dass das Feststellelement mindestens ein form- und kraftschlüssiger Zahn ist.Support foot (100) according to claim 3, characterized in that the locking element is at least one positive and non-positive tooth. Stützfuß (100) nach Anspruch 6, dadurch gekennzeichnet, dass der Zahn (305) aus einem der folgenden Materialien besteht: Kunststoff, Gummi, Metall, insbesondere Stahl, Aluminium, Titan oder einer Legierung dieser Metalle.Support foot (100) according to claim 6, characterized in that the tooth (305) comprises one of the following materials: plastic, rubber, metal, in particular steel, aluminum, titanium or an alloy of these metals. Stützfuß (100) nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der form- und kraftschlüssige Zahn (305) in Radialrichtung derart verschieblich ist, dass er in seiner Fixierposition in Radialrichtung und/oder in Richtung der Zahnflanken über die Zähne der Innenverzahnung (130) übersteht und in seiner nicht fixierten Position in Radialrichtung und/oder in Umfangsrichtung hinter die Zahnflanken der Zähne der Innenverzahnung (130) zurückspringt.Support leg (100) according to claim 7 or 8, characterized in that the positive and non-positive tooth (305) is displaceable in the radial direction such that it in its fixing position in the radial direction and / or in the direction of the tooth flanks on the teeth of the internal toothing (130 protrudes and in its unfixed position in the radial direction and / or in the circumferential direction behind the tooth flanks of the teeth of the internal toothing (130) springs back.
EP20100000143 2009-01-23 2010-01-11 Support base for power screwdrivers Active EP2210709B1 (en)

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CN103846853A (en) * 2012-11-28 2014-06-11 江苏金立电子机械科技有限公司 Reaction force arm for fixed torque wrench
WO2014176468A1 (en) * 2013-04-24 2014-10-30 HYTORC Division Unex Corporation Apparatus for tightening threaded fasteners
EP3372343A1 (en) * 2017-03-09 2018-09-12 Hohmann, Frank Assembly consisting of a torque-discharging support arm and a screwdriver
JP2019130597A (en) * 2018-01-29 2019-08-08 鹿島建設株式会社 Nut runner for fastening coating plate and fastening method for coating plate using the same

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DE202013004157U1 (en) 2013-05-06 2013-06-24 LÖSOMAT-Schraubtechnik Neef GmbH Device for axial locking of toothed elements
CN104175271A (en) * 2014-08-17 2014-12-03 中国北车集团大同电力机车有限责任公司 Pneumatic torque wrench counterforce arm

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DE10043952A1 (en) * 2000-09-06 2002-04-04 Bobby Hu Ratchet tool with angular adjustable head has hand grip with bores, locking pin, press stud, and tensioning device for angular head adjustment
DE20016612U1 (en) * 2000-09-22 2002-02-14 Beyert, Thomas, 53804 Much Variable support system with several rotatable axes for screwing devices
TWI242483B (en) * 2002-10-25 2005-11-01 Hou-Fei Hu Fastener-driving tool assembly

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Publication number Priority date Publication date Assignee Title
CN103846853A (en) * 2012-11-28 2014-06-11 江苏金立电子机械科技有限公司 Reaction force arm for fixed torque wrench
WO2014176468A1 (en) * 2013-04-24 2014-10-30 HYTORC Division Unex Corporation Apparatus for tightening threaded fasteners
EP3372343A1 (en) * 2017-03-09 2018-09-12 Hohmann, Frank Assembly consisting of a torque-discharging support arm and a screwdriver
JP2019130597A (en) * 2018-01-29 2019-08-08 鹿島建設株式会社 Nut runner for fastening coating plate and fastening method for coating plate using the same

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EP2210709B1 (en) 2013-10-23
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