EP3344419B1 - Torque wrench - Google Patents

Torque wrench Download PDF

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Publication number
EP3344419B1
EP3344419B1 EP16766848.2A EP16766848A EP3344419B1 EP 3344419 B1 EP3344419 B1 EP 3344419B1 EP 16766848 A EP16766848 A EP 16766848A EP 3344419 B1 EP3344419 B1 EP 3344419B1
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EP
European Patent Office
Prior art keywords
ratchet
fastening
free space
torque wrench
side walls
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EP16766848.2A
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German (de)
French (fr)
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EP3344419A1 (en
Inventor
Jörg Hohmann
Frank Hohmann
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Individual
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    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • B25B21/005—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type driven by a radially acting hydraulic or pneumatic piston
    • 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 torque wrenches with a ratchet and a drive for the ratchet, the ratchet having a ratchet housing with two opposite side walls which are at a predetermined distance from one another and are connected to one another, a through opening running transversely through the two side walls, which is designed to accommodate a ratchet rotary body, the axis of rotation of which runs parallel to the axis of the through-opening, and with fastening means for fastening a support device to the torque wrench, with which the torque wrench can be supported perpendicularly to the axis of rotation of the ratchet rotary body.
  • a known torque wrench of this type can be assembled from a ratchet unit, which has a ratchet with a ratchet housing, and a drive unit, which has the drive for the ratchet.
  • the drive unit has an extension which, when the ratchet unit and drive unit are in the assembled state, extends into the ratchet housing between its side walls.
  • the extension and the side walls each have a bore which is aligned with one another when the ratchet unit and the drive unit are in the assembled state.
  • These holes are used to attach various support devices to the torque wrench. With these support devices, the torque wrench is supported perpendicularly to the axis of rotation of the ratchet rotating body when torque is applied, for example on the next screw or on the flange.
  • the support devices have two legs which are parallel to one another and are arranged at a distance from one another and which are placed against the side walls of the torque wrench on both sides. Each leg has a bore which is aligned with one another and also with said bores when fitted to the torque wrench.
  • a bolt is then passed from one side through the hole in one leg of the support device, then through the holes in the ratchet unit and in the drive unit and finally through the hole in the other leg of the support device and then into position secured.
  • the invention is based on the object of improving a generic torque wrench in such a way that the fastening option for a supporting device is easier to handle and at the same time can be subjected to higher loads.
  • a support device can be fastened to a torque wrench with little space and in a very simple manner and can also be detached from the torque wrench again, at the same time reducing the production costs for the torque wrench and the fastening means for the support device to be applied with the supporting forces or - moments can be dimensioned smaller.
  • the fastening means have a free space between the side walls, which is accessible from outside the torque wrench and is designed to accommodate a fastening section of the support device, a fastening option is created for the support device into which a fastening section of the support device can be inserted easily and securely.
  • the support device is attached exclusively to the ratchet housing, i. H. without including the drive unit. In the manufacture of the torque wrench, there are therefore no tolerance influences or fitting inaccuracies from elements attached to the drive unit for fastening the support device.
  • the attachment means also includes means for attaching the attachment portion of the support means in the clearance, e.g. H.
  • the fastening takes place in the clearance, so that, for example, a fastening bolt running transversely to the side walls need only extend between the outer walls of the side walls and its shearing surfaces are close to the inner walls of the side walls. Due to the reduced length of the fastening bolt and the reduced distance between its shearing surfaces, the bending stress on the fastening bolt is reduced and its capacity to absorb shear forces is increased.
  • the outer peripheral edges of the two opposite side walls are connected to one another by means of an edge wall and the access opening to the free space is arranged in this edge wall.
  • These measures create a guide for the attachment section of the support device.
  • the access opening is formed by mutually opposite sections of the side walls or by walls parallel to the side walls and mutually opposite sections of the peripheral wall in the circumferential direction of the edge wall Edge wall formed or limited.
  • these delimiting sections of the access opening form a guide for the fastening section, by means of which the fastening section is guided into the free space.
  • the free space in a plane perpendicular to the axis of the through-opening, has a triangular cross-section which tapers into the ratchet housing.
  • the fastening section of the support device can be guided into the free space even more easily.
  • the free space can also have any other cross-sectional shape that is suitable for introducing and fastening the fastening section of the support device. So are e.g. B. other configurations of the taper of the cross section possible, for example a stepped taper. It is also conceivable that the cross section does not taper but is rectangular.
  • the torque wrench has a bore running transversely through the two side walls and the free space, which bore is designed to receive a bolt for fastening the fastening section of the support device. This ensures that the fastening section can be fastened securely, quickly and cost-effectively in the free space.
  • the fastening section of the support device has a bore which is also designed to receive the bolt and which is aligned with the bores in the side walls of the ratchet housing when either the fastening section is in contact with the walls in the free space or the support device is in contact with the edge wall of the ratchet housing.
  • a torque wrench according to the invention can be formed from a ratchet unit, which has the ratchet with a ratchet housing, and a drive unit, which has the drive for the ratchet, the ratchet unit and the drive unit being releasably combinable to form a screwdriver unit.
  • a ratchet unit which has the ratchet with a ratchet housing
  • a drive unit which has the drive for the ratchet
  • the ratchet unit and the drive unit being releasably combinable to form a screwdriver unit.
  • a torque wrench 1 has a hydraulic drive unit 2 and a ratchet unit 3, which are releasably assembled to form a screwdriver unit and are releasably rigidly connected to each other in the assembled state.
  • the torque wrench 1 can also be made in one piece, i. H. the ratchet 3 and the drive 2 for the ratchet 3 cannot be detachably connected to one another.
  • the ratchet has a ratchet housing 4 with two opposite side walls 5 which run parallel to one another at a predetermined distance and are connected to one another.
  • a through-opening 6 runs transversely through the two side walls 5, in which a ratchet rotary body 7 is accommodated, whose axis of rotation 8 runs parallel to the axis 9 of the through-opening 6.
  • the rotary ratchet body 7 in turn has a hexagonal through-opening 10 for receiving a hexagonal nut, for example, in the exemplary embodiment shown.
  • the outer peripheral edges 11 of the side walls 5 are connected to one another by means of an edge wall 12 .
  • the ratchet housing 4 has a cantilever arm 13 which extends away from the ratchet rotating body 7 and forms a seat 15 for the hydraulic drive unit 2 on its one side 14 .
  • the ratchet housing 4 in the cantilever arm 13 has a free space 17 between the side walls 5, which is accessible from outside the torque wrench 1 through an access opening 18 which is in the edge wall 12 on the seat 15 for the side 19 of the cantilever arm 13 facing away from the hydraulic drive unit 2 is arranged.
  • the free space 17 has the shape of a triangle in a cross section parallel to the side walls 5 - ie in a plane perpendicular to the axis 8, 9 of the through opening 6 or the ratchet rotating body 7 - which tapers into the ratchet housing 4 .
  • the size of the triangular angle 20 of the free space 17 opening towards the access opening 18 is adapted to the requirements of the respective application.
  • the tip 21 of the triangular angle 20 opening towards the access opening 18 is rounded.
  • a through hole 22 which runs through the two side walls 5 of the ratchet housing 4 and the free space 17 and is designed to receive a bolt 23 for fastening a fastening section 24 of the support device 16 . Due to the triangular shape of the free space 17, the attachment section 24 of the support device 16 can be easily inserted into the free space 17.
  • the position of the bores 22a in the side walls 5 of the ratchet housing 4, ie the edge distances of these bores 22a to the edge 25 of the free space 17, and the position of the bore 22b in the fastening section 24 of the support device 16, ie the edge distances of this bore 22b to the edge 26 of the fastening section 24, are matched to one another in such a way that the bore 22b in the fastening section 24 is aligned with the bores 22a in the side walls 5 of the ratchet housing 4 when the fastening section 24 is inserted as far as possible into the free space 17, i.e. either the fastening section 24 in the free space 17 rests against the walls 27 thereof or the support device 16 rests against the edge wall 12 of the ratchet housing 4 .
  • the bolt 23 is then first passed through the bore 22a in a side wall 5, then through the bore 22b in the fastening section 24 - and thus through the free space 17 - and finally through the bore 22a in the second side wall 5 of the Ratchet housing 4 passed through.
  • the bolt 23 has a bolt shank 28 and a bolt head 29, the diameter of which is slightly larger than that of the bolt shank 28. At least the bore 22a in one of the side walls 5 has a step 30 on which the bolt head 29 when inserted comes to the plant. When the bolt 23 is inserted, its end faces 31, 32 on the bolt head 29 and on the bolt end are flush with the outer walls 5a of the side walls 5 of the ratchet housing 4.
  • the bolt 23 is secured in position by a spring-loaded ball 33 ( figure 1 ) which, when the bolt 23 is inserted, presses into a recess (not shown) in the bore wall of the fastening section 24 of the support device 16 .
  • a wear plate 34 is shown as the support device 16 to be fastened, with a fastening section 24 which extends transversely to the plane of the plate.
  • the torque wrench 1 is off figure 1 shown with wear plate 34 now attached.
  • its fastening section 24 extends through the access opening 18 in the edge wall 12 of the torque wrench 1 ( figures 1 and 6 ) into the free space 17.
  • the bolt 23 then extends - as described above - through the bores 22a in the side walls 5 of the torque wrench 1 and through the bore 22b in the fastening section 24 of the wear plate 34, with the spring-loaded position securing ball 33 entering the depression in the bore 22b of the fastening section 24 is locked.
  • the wearing plate 34 When it is fastened to the torque wrench 1 , the wearing plate 34 rests against the side 19 or edge wall 12 of the cantilever arm 13 facing away from the drive unit 2 .
  • FIG 7 further examples of possible support devices 16 are shown, such as a support device 35 with an extension for pressure transmission or a ring support device 36 or a support device 37 with an extension arm.
  • the support device 37 with an extension arm does not have a fastening section that is inserted into the free space 17 of the torque wrench 1, but rather two opposing, external fastening sections 38 that are attached to the outside of the side walls 5 of the Torque screwdriver 1 are applied.
  • the bolt 23 is then first passed through the bore 22b in one fastening section 38, then through the bore 22a in the adjacent side wall 5, then through the free space 17 and finally through the bore 22a in the other side wall 5 and through the bore 22b in the other attachment portion 38 out.
  • the bores 22a running through the two side walls 5 of the ratchet housing 4 or the torque wrench 1 are loaded exclusively by the bolt 23 for fastening the support device 16 and the bores 22a and the bolt 23 can therefore be optimally arranged and dimensioned.

Description

Die Erfindung bezieht sich auf Drehmomentschrauber mit einer Ratsche und einem Antrieb für die Ratsche, wobei die Ratsche ein Ratschengehäuse aufweist mit zwei einander gegenüber liegenden Seitenwänden, die einen vorgegebenen Abstand zueinander aufweisen und miteinander verbunden sind, einer quer durch die beiden Seitenwände hindurch verlaufenden Durchgangsöffnung, die zur Aufnahme eines Ratschendrehkörpers ausgelegt ist, wobei dessen Drehachse parallel zur Achse der Durchgangsöffnung verläuft, und mit Befestigungsmitteln zum Befestigen einer Abstützeinrichtung an dem Drehmomentschrauber, mit der der Drehmomentschrauber senkrecht zur Drehachse des Ratschendrehkörpers abstützbar ist.The invention relates to torque wrenches with a ratchet and a drive for the ratchet, the ratchet having a ratchet housing with two opposite side walls which are at a predetermined distance from one another and are connected to one another, a through opening running transversely through the two side walls, which is designed to accommodate a ratchet rotary body, the axis of rotation of which runs parallel to the axis of the through-opening, and with fastening means for fastening a support device to the torque wrench, with which the torque wrench can be supported perpendicularly to the axis of rotation of the ratchet rotary body.

Ein bekannter Drehmomentschrauber dieser Art ist aus einer Ratscheneinheit, die eine Ratsche mit Ratschengehäuse aufweist, und einer Antriebseinheit zusammensetzbar, die den Antrieb für die Ratsche aufweist. Die Antriebseinheit weist einen Fortsatz auf, der sich im zusammengesetzten Zustand von Ratscheneinheit und Antriebseinheit in das Ratschengehäuse hinein zwischen dessen Seitenwände erstreckt. Der Fortsatz und die Seitenwände weisen jeweils eine Bohrung auf, die im zusammengesetzten Zustand von Ratscheneinheit und Antriebseinheit miteinander fluchten. Diese Bohrungen dienen zum Befestigen diverser Abstützeinrichtungen an dem Drehmomentschrauber. Mit diesen Abstützeinrichtungen wird der Drehmomentschrauber senkrecht zur Drehachse des Ratschendrehkörpers beim Aufbringen eines Drehmoments abgestützt, beispielsweise an der nächsten Schraube oder am Flansch.A known torque wrench of this type can be assembled from a ratchet unit, which has a ratchet with a ratchet housing, and a drive unit, which has the drive for the ratchet. The drive unit has an extension which, when the ratchet unit and drive unit are in the assembled state, extends into the ratchet housing between its side walls. The extension and the side walls each have a bore which is aligned with one another when the ratchet unit and the drive unit are in the assembled state. These holes are used to attach various support devices to the torque wrench. With these support devices, the torque wrench is supported perpendicularly to the axis of rotation of the ratchet rotating body when torque is applied, for example on the next screw or on the flange.

Die Abstützeinrichtungen weisen zwei zueinander parallele und zueinander mit Abstand angeordnete Schenkel auf, die beidseits des Drehmomentschraubers an dessen Seitenwände angelegt werden. Jeder Schenkel weist eine Bohrung auf, die miteinander und im an den Drehmomentschrauber passend angelegten Zustand auch mit dessen besagten Bohrungen fluchten. Zur Befestigung einer Abstützeinrichtung an dem Drehmomentschrauber wird dann ein Bolzen von einer Seite durch die Bohrung in einem Schenkel der Abstützeinrichtung, dann durch die Bohrungen in der Ratscheneinheit und in der Antriebseinheit und schließlich durch die Bohrung im anderen Schenkel der Abstützeinrichtung geführt und dann in seiner Lage gesichert.The support devices have two legs which are parallel to one another and are arranged at a distance from one another and which are placed against the side walls of the torque wrench on both sides. Each leg has a bore which is aligned with one another and also with said bores when fitted to the torque wrench. To attach a support device to the torque wrench, a bolt is then passed from one side through the hole in one leg of the support device, then through the holes in the ratchet unit and in the drive unit and finally through the hole in the other leg of the support device and then into position secured.

Das Dokument WO 2014/176468 A1 zeigt einen Drehmomentschrauber nach dem Oberbegriff von Anspruch 1.The document WO 2014/176468 A1 shows a torque wrench according to the preamble of claim 1.

Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen Drehmomentschrauber so zu verbessern, dass die Befestigungsmöglichkeit für eine Abstützeinrichtung einfacher handhabbar und gleichzeitig höher belastbar ist.The invention is based on the object of improving a generic torque wrench in such a way that the fastening option for a supporting device is easier to handle and at the same time can be subjected to higher loads.

Erfindungsgemäß wird diese Aufgabe durch einen Drehmomentschrauber nach Anspruch 1 gelöst.According to the invention, this object is achieved by a torque wrench according to claim 1.

Durch die erfindungsgemäßen Maßnahmen kann mit geringem Platzbedarf und auf sehr einfache Weise eine Abstützeinrichtung an einem Drehmomentschrauber befestigt und von dem Drehmomentschrauber auch wieder gelöst werden, wobei gleichzeitig der Fertigungsaufwand für den Drehmomentschrauber reduziert und die Befestigungsmittel für die Abstützeinrichtung bei unverändert bleibenden aufzubringenden Abstützkräften bzw. -momenten kleiner dimensioniert werden können. Dadurch, dass die Befestigungsmittel einen zwischen den Seitenwänden liegenden Freiraum aufweisen, der von außerhalb des Drehmomentschraubers zugänglich und zur Aufnahme eines Befestigungsabschnitts der Abstützeinrichtung ausgelegt ist, wird für die Abstützeinrichtung eine Befestigungsmöglichkeit geschaffen, in die ein Befestigungsabschnitt der Abstützeinrichtung leicht und sicher eingeführt werden kann. Da die Zugangsöffnung zwischen den beiden Seitenwänden angeordnet ist, wird der Bauraum bzw. Platzbedarf des Drehmomentschraubers quer zu dessen Seitenwänden durch einen in den Freiraum eingeführten Befestigungsabschnitt der Abstützeinrichtung weder bei deren Anbringen noch beim Schraubvorgang vergrößert, sodass die Abstützeinrichtung auch bei engen räumlichen Verhältnissen verwendet werden kann und problemlos in den Drehmomentschrauber eingesetzt bzw. der Drehmomentschrauber auf die Abstützeinrichtung aufgesetzt werden kann. Erfindungsgemäß erfolgt die Befestigung der Abstützeinrichtung ausschließlich am Ratschengehäuse, d. h. ohne Einbeziehung der Antriebseinheit. Bei der Fertigung des Drehmomentschraubers sind daher keine Toleranzeinflüsse bzw. Paßungenauigkeiten aus an der Antriebseinheit angebrachten Elementen zur Befestigung der Abstützeinrichtung vorhanden. Die Befestigungsmittel weisen auch Einrichtungen zum Befestigen des Befestigungsabschnitts der Abstützeinrichtung in dem Freiraum auf, d. h. die Befestigung erfolgt in dem Freiraum, sodass beispielsweise ein quer zu den Seitenwänden verlaufender Befestigungsbolzen sich nur zwischen den Außenwandungen der Seitenwände erstrecken muss und seine Scherflächen sich nahe den Innenwandungen der Seitenwände befinden. Auf Grund der reduzierten Länge des Befestigungsbolzens und des reduzierten Abstands zwischen seinen Scherflächen ist die Biegebeanspruchung des Befestigungsbolzen verringert und damit dessen Aufnahmefähigkeit für Scherkräfte erhöht.Due to the measures according to the invention, a support device can be fastened to a torque wrench with little space and in a very simple manner and can also be detached from the torque wrench again, at the same time reducing the production costs for the torque wrench and the fastening means for the support device to be applied with the supporting forces or - moments can be dimensioned smaller. Because the fastening means have a free space between the side walls, which is accessible from outside the torque wrench and is designed to accommodate a fastening section of the support device, a fastening option is created for the support device into which a fastening section of the support device can be inserted easily and securely. Since the access opening is arranged between the two side walls, the installation space or space requirement of the torque wrench transversely to its side walls is not increased by a fastening section of the support device introduced into the free space, either when it is attached or during the screwing process, so that the support device can also be used in cramped spatial conditions can and easily be used in the torque wrench or the torque wrench can be placed on the support device. According to the invention, the support device is attached exclusively to the ratchet housing, i. H. without including the drive unit. In the manufacture of the torque wrench, there are therefore no tolerance influences or fitting inaccuracies from elements attached to the drive unit for fastening the support device. The attachment means also includes means for attaching the attachment portion of the support means in the clearance, e.g. H. the fastening takes place in the clearance, so that, for example, a fastening bolt running transversely to the side walls need only extend between the outer walls of the side walls and its shearing surfaces are close to the inner walls of the side walls. Due to the reduced length of the fastening bolt and the reduced distance between its shearing surfaces, the bending stress on the fastening bolt is reduced and its capacity to absorb shear forces is increased.

Erfindungsgemäß sind die Außenumfangsränder der beiden einander gegenüberliegenden Seitenwände mittels einer Randwand miteinander verbunden und ist die Zugangsöffnung zum Freiraum in dieser Randwand angeordnet. Durch diese Maßnahmen wird eine Führung für den Befestigungsabschnitt der Abstützeinrichtung geschaffen. Die Zugangsöffnung wird dabei von einander gegenüberliegenden Abschnitten der Seitenwände oder von zu den Seitenwänden parallelen Wänden und einander in Umlaufrichtung der Randwand gegenüberliegenden Abschnitten der Randwand gebildet bzw. begrenzt. Diese Begrenzungsabschnitte der Zugangsöffnung bilden gleichzeitig eine Führung für den Befestigungsabschnitt, mittels der der Befestigungsabschnitt in den Freiraum hineingeführt wird.According to the invention, the outer peripheral edges of the two opposite side walls are connected to one another by means of an edge wall and the access opening to the free space is arranged in this edge wall. These measures create a guide for the attachment section of the support device. The access opening is formed by mutually opposite sections of the side walls or by walls parallel to the side walls and mutually opposite sections of the peripheral wall in the circumferential direction of the edge wall Edge wall formed or limited. At the same time, these delimiting sections of the access opening form a guide for the fastening section, by means of which the fastening section is guided into the free space.

Erfindungsgemäß weist der Freiraum in einer Ebene senkrecht zur Achse der Durchgangsöffnung einen dreieckförmigen Querschnitt auf, der sich in das Ratschengehäuse hinein verjüngt. Hierdurch kann der Befestigungsabschnitt der Abstützeinrichtung noch leichter in den Freiraum hineingeführt werden. Der Freiraum kann jedoch auch jede andere Querschnittsform aufweisen, die zum Hineinführen und Befestigen des Befestigungsabschnitts der Abstützeinrichtung geeignet ist. So sind z. B. andere Ausgestaltungen der Verjüngung des Querschnitts möglich, beispielsweise eine stufenförmige Verjüngung. Denkbar ist auch, dass der Querschnitt sich nicht verjüngt, sondern rechteckig ausgebildet ist.According to the invention, in a plane perpendicular to the axis of the through-opening, the free space has a triangular cross-section which tapers into the ratchet housing. As a result, the fastening section of the support device can be guided into the free space even more easily. However, the free space can also have any other cross-sectional shape that is suitable for introducing and fastening the fastening section of the support device. So are e.g. B. other configurations of the taper of the cross section possible, for example a stepped taper. It is also conceivable that the cross section does not taper but is rectangular.

Gemäß der Erfindung weist der Drehmomentschrauber eine quer durch die beiden Seitenwände und den Freiraum verlaufende Bohrung auf, die zur Aufnahme eines Bolzens zum Befestigen des Befestigungsabschnitts der Abstützeinrichtung ausgelegt ist. Eine sichere und schnelle und zudem kostengünstige Befestigung des Befestigungsabschnitts in dem Freiraum ist auf diese Weise gewährleistet.According to the invention, the torque wrench has a bore running transversely through the two side walls and the free space, which bore is designed to receive a bolt for fastening the fastening section of the support device. This ensures that the fastening section can be fastened securely, quickly and cost-effectively in the free space.

In Ausgestaltung der Erfindung weist der Befestigungsabschnitt der Abstützeinrichtung eine Bohrung auf, die ebenfalls zur Aufnahme des Bolzens ausgelegt ist und die mit den Bohrungen in den Seitenwänden des Ratschengehäuses fluchtet, wenn entweder der Befestigungsabschnitt im Freiraum an dessen Wänden anliegt oder die Abstützeinrichtung an der Randwand des Ratschengehäuses anliegt. Mit diesen Maßnahmen wird erreicht, dass die Bohrungen in den Seitenwänden des Ratschengehäuses und im Befestigungsabschnitt der Abstützeinrichtung ohne weiteres Ausrichten miteinander fluchten, wenn der Befestigungsabschnitt so weit wie möglich in den Freiraum eingeführt ist.In an embodiment of the invention, the fastening section of the support device has a bore which is also designed to receive the bolt and which is aligned with the bores in the side walls of the ratchet housing when either the fastening section is in contact with the walls in the free space or the support device is in contact with the edge wall of the ratchet housing. These measures ensure that the bores in the side walls of the ratchet housing and in the fastening section of the support device are aligned with one another without further alignment when the fastening section is inserted as far as possible into the free space.

Ein erfindungsgemäßer Drehmomentschrauber kann aus einer Ratscheneinheit, die die Ratsche mit Ratschengehäuse aufweist, und einer Antriebseinheit gebildet sein, die den Antrieb für die Ratsche aufweist, wobei die Ratscheneinheit und die Antriebseinheit lösbar zu einer Schraubereinheit zusammensetzbar sind. Mit diesen Maßnahmen ist es möglich, je nach Anwendungsfall das Ratschengehäuse auszutauschen und auf diese Weise die Schlüsselweiten anzupassen. Auf diese Weise muss nicht für jedes Ratschengehäuse eine eigene Antriebseinheit vorhanden sein. Der Drehmomentschrauber kann jedoch auch einteilig ausgeführt werden, d. h. Antrieb und Ratsche sind dann nicht voneinander trennbar, falls dies für Anwendungsfälle vorteilhaft oder erforderlich ist.A torque wrench according to the invention can be formed from a ratchet unit, which has the ratchet with a ratchet housing, and a drive unit, which has the drive for the ratchet, the ratchet unit and the drive unit being releasably combinable to form a screwdriver unit. With these measures it is possible, depending on the application, to exchange the ratchet housing and in this way to adjust the width across flats. In this way, it is not necessary for each ratchet housing to have its own drive unit. However, the torque wrench can also be made in one piece, ie the drive and ratchet cannot be separated from one another if this is advantageous or necessary for the application.

Die Erfindung wird anhand der nachfolgenden Zeichnungen beispielshalber näher erläutert. Es zeigen:

Figur 1
eine perspektivische Ansicht einer Ausführungsform eines erfindungsgemäßen Drehmomentschraubers, wobei auch eine daran zu befestigende Abstützeinrichtung und ein Bolzen zu deren Befestigung dargestellt sind;
Figur 2
eine perspektivische Ansicht der Ausführungsform aus Figur 1, wobei die Abstützeinrichtung mittels des Bolzens an dem Drehmomentschrauber befestigt ist;
Figur 3
eine Seitenansicht der Ausführungsform aus Figur 2;
Figur 4
eine Rückansicht der Ausführungsform aus Figur 2;
Figur 5
eine Seitenansicht der Ausführungsform aus Figur 1, mit einem Teilschnitt im Bereich der Befestigungsmittel für eine Abstützeinrichtung;
Figur 6
eine Unteransicht der Ausführungsform aus Figur 1 und
Figur 7
in einer Perspektivansicht die Ausführungsform aus Figur 1, mit mehreren Ausführungsformen einer Abstützeinrichtung.
The invention is explained in more detail by way of example with reference to the following drawings. Show it:
figure 1
a perspective view of an embodiment of a torque wrench according to the invention, wherein a support device to be attached thereto and a bolt for their attachment are also shown;
figure 2
a perspective view of the embodiment figure 1 , wherein the supporting device is fixed to the torque wrench by means of the bolt;
figure 3
Figure 1 shows a side view of the embodiment figure 2 ;
figure 4
Figure 1 shows a rear view of the embodiment figure 2 ;
figure 5
Figure 1 shows a side view of the embodiment figure 1 , with a partial section in the area of the attachment means for a support device;
figure 6
a bottom view of the embodiment figure 1 and
figure 7
in a perspective view the embodiment figure 1 , with several embodiments of a support device.

Das in den Figuren 1 bis 7 dargestellte Ausführungsbeispiel eines erfindungsgemäßen Drehmomentschraubers 1 weist eine hydraulische Antriebseinheit 2 und eine Ratscheneinheit 3 auf, die lösbar zu einer Schraubereinheit zusammengesetzt sind und im zusammengesetzten Zustand lösbar starr miteinander verbunden sind.That in the Figures 1 to 7 illustrated embodiment of a torque wrench 1 according to the invention has a hydraulic drive unit 2 and a ratchet unit 3, which are releasably assembled to form a screwdriver unit and are releasably rigidly connected to each other in the assembled state.

Alternativ kann der Drehmomentschrauber 1 auch einteilig ausgeführt sein, d. h. die Ratsche 3 und der Antrieb 2 für die Ratsche 3 nichtlösbar miteinander verbunden sein.Alternatively, the torque wrench 1 can also be made in one piece, i. H. the ratchet 3 and the drive 2 for the ratchet 3 cannot be detachably connected to one another.

Die Ratsche weist ein Ratschengehäuse 4 mit zwei einander gegenüberliegenden Seitenwänden 5 auf, die in einem vorgegebenen Abstand parallel zueinander verlaufen und miteinander verbunden sind. Quer durch die beiden Seitenwände 5 hindurch verläuft eine Durchgangsöffnung 6, in der ein Ratschendrehkörper 7 aufgenommen ist, dessen Drehachse 8 parallel zur Achse 9 der Durchgangsöffnung 6 verläuft. Der Ratschendrehkörper 7 wiederum hat im dargestellten Ausführungsbeispiel eine sechskantförmige Durchgangsöffnung 10 zur Aufnahme beispielsweise einer Sechskantmutter.The ratchet has a ratchet housing 4 with two opposite side walls 5 which run parallel to one another at a predetermined distance and are connected to one another. A through-opening 6 runs transversely through the two side walls 5, in which a ratchet rotary body 7 is accommodated, whose axis of rotation 8 runs parallel to the axis 9 of the through-opening 6. The rotary ratchet body 7 in turn has a hexagonal through-opening 10 for receiving a hexagonal nut, for example, in the exemplary embodiment shown.

Die Außenumfangsränder 11 der Seitenwände 5 sind mittels einer Randwand 12 miteinander verbunden.The outer peripheral edges 11 of the side walls 5 are connected to one another by means of an edge wall 12 .

Das Ratschengehäuse 4 weist einen Kragarm 13 auf, der sich von dem Ratschendrehkörper 7 wegerstreckt und auf seiner einen Seite 14 einen Sitz 15 für die hydraulische Antriebseinheit 2 ausbildet.The ratchet housing 4 has a cantilever arm 13 which extends away from the ratchet rotating body 7 and forms a seat 15 for the hydraulic drive unit 2 on its one side 14 .

Zur Befestigung einer Abstützeinrichtung 16 an dem Drehmomentschrauber 1 weist das Ratschengehäuse 4 in dem Kragarm 13 zwischen den Seitenwänden 5 einen Freiraum 17 auf, der von außerhalb des Drehmomentschraubers 1 durch eine Zugangsöffnung 18 zugänglich ist, die in der Randwand 12 auf der dem Sitz 15 für die hydraulische Antriebseinheit 2 abgewandten Seite 19 des Kragarms 13 angeordnet ist.To attach a support device 16 to the torque wrench 1, the ratchet housing 4 in the cantilever arm 13 has a free space 17 between the side walls 5, which is accessible from outside the torque wrench 1 through an access opening 18 which is in the edge wall 12 on the seat 15 for the side 19 of the cantilever arm 13 facing away from the hydraulic drive unit 2 is arranged.

Wie aus Figur 5 ersichtlich ist, hat in diesem Ausführungsbeispiel der Freiraum 17 in einem Querschnitt parallel zu den Seitenwänden 5 - d. h. in einer Ebene senkrecht zur Achse 8, 9 der Durchgangsöffnung 6 oder des Ratschendrehkörpers 7 - die Form eines Dreiecks, das sich in das Ratschengehäuse 4 hinein verjüngt. Die Größe des zur Zugangsöffnung 18 hin öffnenden Dreieckswinkels 20 des Freiraums 17 ist an die Erfordernisse des jeweiligen Anwendungsfalls angepasst.How out figure 5 As can be seen, in this exemplary embodiment the free space 17 has the shape of a triangle in a cross section parallel to the side walls 5 - ie in a plane perpendicular to the axis 8, 9 of the through opening 6 or the ratchet rotating body 7 - which tapers into the ratchet housing 4 . The size of the triangular angle 20 of the free space 17 opening towards the access opening 18 is adapted to the requirements of the respective application.

Die Spitze 21 des zur Zugangsöffnung 18 hin öffnenden Dreieckswinkels 20 ist abgerundet. Im Bereich dieser abgerundeten Dreiecksspitze 21 verläuft eine Durchgangsbohrung 22, die die beiden Seitenwände 5 des Ratschengehäuses 4 und den Freiraum 17 durchläuft und zur Aufnahme eines Bolzens 23 zum Befestigen eines Befestigungsabschnitts 24 der Abstützeinrichtung 16 ausgelegt ist. Aufgrund der Dreiecksform des Freiraums 17 kann der Befestigungsabschnitt 24 der Abstützeinrichtung 16 leicht in den Freiraum 17 eingeführt werden.The tip 21 of the triangular angle 20 opening towards the access opening 18 is rounded. In the area of this rounded triangular tip 21 runs a through hole 22 which runs through the two side walls 5 of the ratchet housing 4 and the free space 17 and is designed to receive a bolt 23 for fastening a fastening section 24 of the support device 16 . Due to the triangular shape of the free space 17, the attachment section 24 of the support device 16 can be easily inserted into the free space 17.

Die Lage der Bohrungen 22a in den Seitenwänden 5 des Ratschengehäuses 4, d. h. die Randabstände dieser Bohrungen 22a zum Rand 25 des Freiraums 17, und die Lage der Bohrung 22b im Befestigungsabschnitt 24 der Abstützeinrichtung 16, d. h. die Randabstände dieser Bohrung 22b zum Rand 26 des Befestigungsabschnitts 24, sind so aufeinander abgestimmt, dass die Bohrung 22b im Befestigungsabschnitt 24 mit den Bohrungen 22a in den Seitenwänden 5 des Ratschengehäuses 4 fluchtet, wenn der Befestigungsabschnitt 24 so weit wie möglich in den Freiraum 17 eingeführt ist, d. h. entweder der Befestigungsabschnitt 24 im Freiraum 17 an dessen Wänden 27 anliegt oder die Abstützeinrichtung 16 an der Randwand 12 des Ratschengehäuses 4 anliegt.The position of the bores 22a in the side walls 5 of the ratchet housing 4, ie the edge distances of these bores 22a to the edge 25 of the free space 17, and the position of the bore 22b in the fastening section 24 of the support device 16, ie the edge distances of this bore 22b to the edge 26 of the fastening section 24, are matched to one another in such a way that the bore 22b in the fastening section 24 is aligned with the bores 22a in the side walls 5 of the ratchet housing 4 when the fastening section 24 is inserted as far as possible into the free space 17, i.e. either the fastening section 24 in the free space 17 rests against the walls 27 thereof or the support device 16 rests against the edge wall 12 of the ratchet housing 4 .

Zum Befestigen einer Abstützeinrichtung 16 wird dann der Bolzen 23 zunächst durch die Bohrung 22a in einer Seitenwand 5 hindurch, dann durch die Bohrung 22b im Befestigungsabschnitt 24 - und damit durch den Freiraum 17 hindurch - und schließlich durch die Bohrung 22a in der zweiten Seitenwand 5 des Ratschengehäuses 4 hindurch geführt.To fasten a support device 16, the bolt 23 is then first passed through the bore 22a in a side wall 5, then through the bore 22b in the fastening section 24 - and thus through the free space 17 - and finally through the bore 22a in the second side wall 5 of the Ratchet housing 4 passed through.

In Figur 1 ist dargestellt, dass der Bolzen 23 einen Bolzenschaft 28 und einen Bolzenkopf 29 aufweist, dessen Durchmesser etwas größer ist als der des Bolzenschaftes 28. Zumindest die Bohrung 22a in einer der Seitenwände 5 weist eine Stufe 30 auf, an der der Bolzenkopf 29 im eingesetzten Zustand zur Anlage kommt. Im eingesetzten Zustand des Bolzens 23 sind dessen Endflächen 31, 32 am Bolzenkopf 29 und am Bolzenende bündig mit den Außenwandungen 5a der Seitenwände 5 des Ratschengehäuses 4.In figure 1 is shown that the bolt 23 has a bolt shank 28 and a bolt head 29, the diameter of which is slightly larger than that of the bolt shank 28. At least the bore 22a in one of the side walls 5 has a step 30 on which the bolt head 29 when inserted comes to the plant. When the bolt 23 is inserted, its end faces 31, 32 on the bolt head 29 and on the bolt end are flush with the outer walls 5a of the side walls 5 of the ratchet housing 4.

Die Lagesicherung des Bolzens 23 erfolgt durch eine unter Federvorspannung stehende Kugel 33 (Figur 1), die sich im eingesetzten Zustand des Bolzens 23 in eine (nicht dargestellte) Vertiefung in der Bohrungswandung des Befestigungsabschnitts 24 der Abstützeinrichtung 16 hineindrückt.The bolt 23 is secured in position by a spring-loaded ball 33 ( figure 1 ) which, when the bolt 23 is inserted, presses into a recess (not shown) in the bore wall of the fastening section 24 of the support device 16 .

In Figur 1 ist als zu befestigende Abstützeinrichtung 16 eine Verschleißplatte 34 dargestellt mit einem Befestigungsabschnitt 24, der sich quer zur Plattenebene erstreckt.In figure 1 a wear plate 34 is shown as the support device 16 to be fastened, with a fastening section 24 which extends transversely to the plane of the plate.

In den Figuren 2 bis 4 ist der Drehmomentschrauber 1 aus Figur 1 mit nunmehr befestigter Verschleißplatte 34 dargestellt. Im befestigten Zustand der Verschleißplatte 34 erstreckt sich deren Befestigungsabschnitt 24 durch die Zugangsöffnung 18 in der Randwand 12 des Drehmomentschraubers 1 (Figuren 1 und 6) in den Freiraum 17 hinein. Der Bolzen 23 erstreckt sich dann - wie oben beschrieben - durch die Bohrungen 22a in den Seitenwänden 5 des Drehmomentschraubers 1 und durch die Bohrung 22b im Befestigungsabschnitt 24 der Verschleißplatte 34 hindurch, wobei die federvorgespannte Lagesicherungskugel 33 in die Vertiefung in der Bohrung 22b des Befestigungsabschnitts 24 eingerastet ist.In the Figures 2 to 4 the torque wrench 1 is off figure 1 shown with wear plate 34 now attached. In the fastened state of the wear plate 34, its fastening section 24 extends through the access opening 18 in the edge wall 12 of the torque wrench 1 ( figures 1 and 6 ) into the free space 17. The bolt 23 then extends - as described above - through the bores 22a in the side walls 5 of the torque wrench 1 and through the bore 22b in the fastening section 24 of the wear plate 34, with the spring-loaded position securing ball 33 entering the depression in the bore 22b of the fastening section 24 is locked.

In ihrem am Drehmomentschrauber 1 befestigten Zustand liegt die Verschleißplatte 34 an der der Antriebseinheit 2 abgewandten Seite 19 bzw. Randwand 12 des Kragarms 13 an.When it is fastened to the torque wrench 1 , the wearing plate 34 rests against the side 19 or edge wall 12 of the cantilever arm 13 facing away from the drive unit 2 .

In Figur 7 sind noch weitere Beispiele für mögliche Abstützeinrichtungen 16 dargestellt, wie eine Abstützeinrichtung 35 mit Verlängerung für die Druckweiterleitung oder eine Ring-Abstützeinrichtung 36 oder eine Abstützeinrichtung 37 mit Verlängerungsarm.In figure 7 further examples of possible support devices 16 are shown, such as a support device 35 with an extension for pressure transmission or a ring support device 36 or a support device 37 with an extension arm.

Die Abstützeinrichtung 37 mit Verlängerungsarm weist keinen Befestigungsabschnitt auf, der in den Freiraum 17 des Drehmomentschraubers 1 eingeführt wird, sondern zwei einander gegenüberliegende, außen liegende Befestigungsabschnitte 38, die außen an die Seitenwände 5 des Drehmomentschraubers 1 angelegt werden. Der Bolzen 23 wird dann zunächst durch die Bohrung 22b in dem einen Befestigungsabschnitt 38, anschließend durch die Bohrung 22a in der benachbarten Seitenwand 5, dann durch den Freiraum 17 hindurch und schließlich durch die Bohrung 22a in der anderen Seitenwand 5 und durch die Bohrung 22b in dem anderen Befestigungsabschnitt 38 geführt.The support device 37 with an extension arm does not have a fastening section that is inserted into the free space 17 of the torque wrench 1, but rather two opposing, external fastening sections 38 that are attached to the outside of the side walls 5 of the Torque screwdriver 1 are applied. The bolt 23 is then first passed through the bore 22b in one fastening section 38, then through the bore 22a in the adjacent side wall 5, then through the free space 17 and finally through the bore 22a in the other side wall 5 and through the bore 22b in the other attachment portion 38 out.

In allen Fällen werden die die beiden Seitenwände 5 des Ratschengehäuses 4 bzw. des Drehmomentschraubers 1 durchlaufenden Bohrungen 22a ausschließlich durch den Bolzen 23 zum Befestigen der Abstützeinrichtung 16 belastet und können daher die Bohrungen 22a und der Bolzen 23 optimal angeordnet und dimensioniert werden.In all cases, the bores 22a running through the two side walls 5 of the ratchet housing 4 or the torque wrench 1 are loaded exclusively by the bolt 23 for fastening the support device 16 and the bores 22a and the bolt 23 can therefore be optimally arranged and dimensioned.

Claims (3)

  1. A torque wrench comprising a ratchet (3) and a drive (2) for the ratchet (3), wherein the ratchet includes a ratchet housing (4) comprising
    two mutually opposite side walls (5) which have a specified distance to each other and are connected to each other,
    a through opening (6) extending transversely through the two side walls (5), which is designed to receive a ratchet rotary body (7), wherein its axis of rotation (8) is parallel to the axis (9) of the through opening (6), and comprising
    fastening means (17, 22, 23) for fastening a supporting device (16) to the torque wrench (1), by means of which the torque wrench (1) can be supported perpendicularly to the axis of rotation (8) of the ratchet rotary body (7),
    wherein the fastening means (17, 22, 23) include a free space (17) located between the side walls (5), which is designed to receive a fastening portion (24) of the supporting device (16), and
    wherein the fastening means (17, 22, 23) include devices (22, 23) for fastening the fastening portion (24) in the free space (17),
    wherein the free space (17) is accessible from outside the torque wrench (1) when the side walls (5) are connected to each other, wherein the outer circumferential edges (11) of the two mutually opposite side walls (5) are connected to each other by means of a rim wall (12) and the access opening (18) to the free space (17) is arranged in this rim wall (12) and adapted for the fastening portion (24) of the supporting device (16) to be introduced through said opening (18) and into the free space (17), and
    the fastening means (17, 22, 23) include devices (22, 23) for releasably fastening the fastening portion (24) in the free space (17), wherein a bore (22, 22a) extends transversely through the two side walls (5) and the free space (17), which bore is designed to receive a bolt (23) for fastening the fastening portion (24) of the supporting device (16), and
    wherein the fastening portion (24) of the supporting device (16) includes a bore (22b) which likewise is designed to receive the bolt (23) and which is aligned with the bores (22a) in the side walls (5) of the ratchet housing (4), characterized in that the alignment is achieved when either the fastening portion (24) in the free space (17) rests against its walls (27) or the supporting device (16) rests against the rim wall (12) of the ratchet housing (4).
  2. The torque wrench according to claim 1, characterized in that in a plane perpendicular to the axis (9) of the through opening (6) the free space (17) has a triangular cross-section which tapers into the ratchet housing (4).
  3. The torque wrench according to any of claims 1 or 2, characterized by a ratchet unit which includes the ratchet (3) with the ratchet housing (4), and a drive unit which includes the drive (2) for the ratchet (3), wherein the ratchet unit and the drive unit can be releasably assembled to form a screwdriver unit.
EP16766848.2A 2015-09-02 2016-08-22 Torque wrench Active EP3344419B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015011553.7A DE102015011553A1 (en) 2015-09-02 2015-09-02 torque wrench
PCT/EP2016/001416 WO2017036579A1 (en) 2015-09-02 2016-08-22 Torque wrench

Publications (2)

Publication Number Publication Date
EP3344419A1 EP3344419A1 (en) 2018-07-11
EP3344419B1 true EP3344419B1 (en) 2022-07-20

Family

ID=56943461

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Application Number Title Priority Date Filing Date
EP16766848.2A Active EP3344419B1 (en) 2015-09-02 2016-08-22 Torque wrench

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US (1) US10875160B2 (en)
EP (1) EP3344419B1 (en)
JP (1) JP6560817B2 (en)
DE (1) DE102015011553A1 (en)
DK (1) DK3344419T3 (en)
ES (1) ES2925070T3 (en)
WO (1) WO2017036579A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034148A1 (en) * 1989-10-27 1991-05-29 Raymond Engineering FLAT TORQUE WRENCH WITH RACK GEARBOX
JP2010023209A (en) * 2008-07-23 2010-02-04 Bestma Kk Torque wrench device
WO2014176468A1 (en) * 2013-04-24 2014-10-30 HYTORC Division Unex Corporation Apparatus for tightening threaded fasteners

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409865A (en) * 1981-01-15 1983-10-18 Unex Corporation Continuous ratchet drive
US4663997A (en) * 1986-01-14 1987-05-12 Junkers John K Fluid-operated wrench
US20020073808A1 (en) * 2000-12-15 2002-06-20 Jamra James A. Housing for a power tool
US8371190B2 (en) * 2008-11-06 2013-02-12 Asaf Miller Fingertip tool holder
JP6272758B2 (en) * 2011-08-26 2018-01-31 ハイトーク ディビジョン ユネックス コーポレイション Instruments for tightening screw-in fasteners

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034148A1 (en) * 1989-10-27 1991-05-29 Raymond Engineering FLAT TORQUE WRENCH WITH RACK GEARBOX
JP2010023209A (en) * 2008-07-23 2010-02-04 Bestma Kk Torque wrench device
WO2014176468A1 (en) * 2013-04-24 2014-10-30 HYTORC Division Unex Corporation Apparatus for tightening threaded fasteners

Also Published As

Publication number Publication date
US10875160B2 (en) 2020-12-29
DE102015011553A1 (en) 2017-03-02
JP2018523585A (en) 2018-08-23
EP3344419A1 (en) 2018-07-11
ES2925070T3 (en) 2022-10-13
US20180178356A1 (en) 2018-06-28
JP6560817B2 (en) 2019-08-14
WO2017036579A1 (en) 2017-03-09
DK3344419T3 (en) 2022-08-15

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