EP0697268A1 - Device for the releasable connection of a handle being turnable for adjusting purposes - Google Patents

Device for the releasable connection of a handle being turnable for adjusting purposes Download PDF

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Publication number
EP0697268A1
EP0697268A1 EP95110260A EP95110260A EP0697268A1 EP 0697268 A1 EP0697268 A1 EP 0697268A1 EP 95110260 A EP95110260 A EP 95110260A EP 95110260 A EP95110260 A EP 95110260A EP 0697268 A1 EP0697268 A1 EP 0697268A1
Authority
EP
European Patent Office
Prior art keywords
handle
tube
rotating ring
sleeve
locking
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
EP95110260A
Other languages
German (de)
French (fr)
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EP0697268B1 (en
Inventor
Gerd Fierus
Udo Fierus
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.)
Hazet Werk Hermann Zerver GmbH and Co KG
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Hazet Werk Hermann Zerver GmbH and Co KG
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Application filed by Hazet Werk Hermann Zerver GmbH and Co KG filed Critical Hazet Werk Hermann Zerver GmbH and Co KG
Publication of EP0697268A1 publication Critical patent/EP0697268A1/en
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Publication of EP0697268B1 publication Critical patent/EP0697268B1/en
Anticipated expiration legal-status Critical
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/142Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
    • B25B23/1422Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
    • B25B23/1427Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by mechanical means

Definitions

  • the invention relates to a device for releasably fixing a handle that can be rotated for adjustment purposes, preferably a torque wrench, on a tube with a circular cylindrical outer surface, wherein at least one locking piece that is adjustable in the radial direction to the tube between a release position and a locking position is arranged in the locking position engages in depressions in the outer surface of the tube.
  • the respective release torque is set by adjusting a compression spring by turning the handle connected to a threaded spindle relative to the housing of the torque wrench.
  • the housing is usually formed by a tube which is circular in diameter and carries the square drive at the front end and the handle at the rear end.
  • the handle is fixed in the use position on the tubular housing. This is done, for example, by means of a clamping screw which presses radially on the housing tube, but does not achieve a reliable fixing because of the circular cylindrical surface of the tube.
  • Devices for releasably fixing a handle that can be rotated for adjustment purposes are not only required for torque wrenches, but also for other hand tools, for example grip pliers.
  • the invention has for its object to provide a device for releasably fixing a handle that can be rotated for adjustment purposes on a tube with a cylindrical cylindrical surface, which allows an almost infinitely variable and reliable fixing with simple handling with little technical effort and thus inexpensive.
  • the locking piece is designed as a U-shaped claw, which engages with the front edges of their legs in the secantial direction in axially extending recesses in the lateral surface of the tube and which by at one on the Handle trained twisting ring trained, curved control surfaces between its release position and its locking position is adjustable.
  • a releasable fixing of the rotatable handle on the circular cylindrical outer surface of the tube can be achieved in a very simple manner, with the quasi-stepless fixing and thus setting of the handle being possible through the formation of the immediately successive depressions in the circumferential direction.
  • the handle is formed at one end with a circular cylindrical bearing surface for the rotating ring, which is held in the axial direction by a sleeve which can be fixed on the handle.
  • this sleeve is fixed axially and circumferentially on the handle via at least one resilient tongue arranged on the handle, which engages with a pin from the inside in a pin opening of the sleeve.
  • the sleeve can be provided with a scale.
  • the invention proposes to manufacture the handle with the bearing surface for the rotating ring and preferably with two resilient tongues for holding the sleeve in one piece from plastic.
  • At least two opposing claws are arranged in the handle according to a further feature of the invention. According to a further feature of the invention, these are each loaded in the direction of their release position by a return spring in order to ensure a safe return from the locking position.
  • the rotating ring is mounted on the handle so that it can be rotated to a limited extent, the angle of rotation of the rotating ring preferably being limited by stops on the rotating ring and / or on the handle.
  • the invention proposes to hold the rotating ring detachably in the respective end position by a detent spring.
  • the invention results in a structurally simple and therefore inexpensive to manufacture device for releasably fixing a handle that can be rotated almost infinitely for adjustment purposes on a tube with a circular cylindrical surface, which ensures a functionally reliable fixing in any position.
  • the handle 1 shown in the exemplary embodiment as a torque wrench handle is rotatably mounted on the rear end of a tube 2 serving as a shaft of the torque wrench with a circular cylindrical outer surface.
  • the handle 1 is used to set the respective trigger torque of the torque wrench, not shown. This adjustment of the trigger torque is carried out by a threaded rod 3, which is adjustable in the rear end of the handle 1, but is non-rotatably connected to the handle 1.
  • this connection is made with the aid of an adjusting element 4, which is injected into the handle 1, which is made of plastic in the exemplary embodiment, and is therefore non-rotatably connected to it.
  • Loose coupling pieces 5 are arranged in this adjusting element 4, which cooperate via an end toothing with the end toothing of a clutch disc 6, which in turn is arranged non-rotatably on a polygonal section 3a of the threaded rod 3 and is held by a fixing nut 7.
  • the adjustment element 4 is arranged on the threaded rod 3 by means of a threaded sleeve 8, which is supported on a base plate 9 arranged on the threaded rod 3 and serves for the basic setting of the torque wrench.
  • the torque wrench can be adjusted with the components described above. Access to the components is then blocked by a cap 10 closing the rear end of the handle.
  • a sleeve 12 is provided which is held non-rotatably on the handle 1, with the aid of resilient tongues 1b which, in the exemplary embodiment, form one piece with the front end of the bearing surface 1a Extension of the handle 1 are formed.
  • Each tongue 1b is provided with a radially outwardly pointing pin 1c which engages from the inside in a pin opening of the sleeve 12 and in this way fixes this sleeve 12 both in the axial direction and in the circumferential direction on the handle 1 in such a way that the rotating ring 11 can rotate between sleeve 12 and handle 1.
  • locking pieces are arranged in the handle, each of which is designed as a U-shaped claw 13 in the exemplary embodiment.
  • Each of these claws 13 is loaded by a return spring 14 acting radially outwards.
  • a detent spring 15 is also arranged in the rotating ring 11, the effect of which will be described below.
  • each claw 13 with a cross-section U-shaped with its legs 13a engages in the handle 1, so that the end edges of the legs 13a with the circular cylindrical surface of the tube 2 in Can come into contact, which is provided in the area of the claws 13 with depressions 2a.
  • These depressions 2a are in the embodiment as in the longitudinal direction of the Tube 2 extending grooves created by knurling, which have a very small distance from each other in the circumferential direction, so that they enable an almost infinitely variable fixing of the rotatable handle 1 on the tube 2.
  • the rotating ring 11 In order to adjust the claws 13 in the radial direction between a release position according to FIG. 3b and a locking position according to FIG. 3a, the rotating ring 11 interacts with the web 13b of the respective claw 13 via curved control surfaces 11a and 11b. If the rotating ring 11 is in the locking position shown in FIG. 3a, the control surfaces 11a press the claws 13 with the edges of their legs 13a into the depressions 2a of the tube 2. In this position the handle 1 is fixed on the tube 2 in a non-rotatable manner.
  • the rotating ring 11 is rotated counterclockwise from the locking position shown in FIG. 3a into the released position shown in FIG. 3b, the webs 13b of the claws 13 reach the area of the control surfaces 11b of the rotating ring 11. In the area of these control surfaces 11b, the claws can 13 perform a radially outward release movement, which is caused by the return springs 14. In this release position, the end edges of the legs 13a are at a distance from the cylindrical surface of the tube 2, so that the handle 1 can be rotated on the tube 2.
  • stops 11c are provided on the rotating ring 11, which cooperate with stops 1d on the handle 1 and limit the angle of rotation to approximately 90 °, as can be seen from FIGS. 2a and 2b.
  • the catch spring 15 arranged between the stops 11c on the rotating ring 11 engages in catch recesses 1e which are formed on the handle 1. In this way it is ensured that not only the respective end position is non-positively secured, but that the user of the handle is informed by an acoustic signal that the rotating ring 11 is in the desired end position.
  • the claws 13 are transferred between the locking position and the release position in a particularly simple manner by turning the rotating ring 11, which, with its large-area control surfaces 11a and 11b, reliably controls the movement of the claws 13 in the radial direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

The locking part is formed as a U-shaped claw (13). The end edges of the claw legs (13a) engage vertically into axial recesses in the jacket surface of the tube (2). The claw is moved between locking and release positions by cam-shaped control surfaces (11a,b). These are formed on a turning ring (11), which moves to a limited degree on the hand grip (1). One end of the hand grip has a circular cylindrical bearing face for the turning ring. The ring is secured in axial direction by a sleeve, which may be locked on the grip.

Description

Die Erfindung betrifft eine Vorrichtung zur lösbaren Festlegung eines zu Verstellzwecken verdrehbaren Handgriffes, vorzugsweise eines Drehmomentschlüssels, auf einem Rohr mit kreiszylindrischer Mantelfläche, wobei im Handgriff mindestens ein in radialer Richtung zum Rohr zwischen einer Lösestellung und einer Arretierstellung verstellbares Arretierstück angeordnet ist, das in der Arretierstellung in Vertiefungen in der Mantelfläche des Rohres eingreift.The invention relates to a device for releasably fixing a handle that can be rotated for adjustment purposes, preferably a torque wrench, on a tube with a circular cylindrical outer surface, wherein at least one locking piece that is adjustable in the radial direction to the tube between a release position and a locking position is arranged in the locking position engages in depressions in the outer surface of the tube.

Bei Drehmomentschlüsseln wird das jeweilige Auslösedrehmoment durch Verstellen einer Druckfeder eingestellt, indem der mit einer Gewindespindel verbundene Handgriff relativ zum Gehäuse des Drehmomentschlüssels verdreht wird. Das Gehäuse wird üblicherweise durch ein im Durchmesser kreisförmiges Rohr gebildet, das am vorderen Ende den Antriebsvierkant und am hinteren Ende den Handgriff trägt. Um das jeweils eingestellte Auslösedrehmoment bei einer Benutzung des Drehmomentschlüssels gegen Verstellen zu sichern, wird der Handgriff in der Gebrauchsstellung auf dem rohrförmigen Gehäuse festgelegt. Dies geschieht beispielsweise durch eine Klemmschraube, die radial auf das Gehäuserohr drückt, wegen der kreiszylindrischen Mantelfläche des Rohres jedoch keine zuverlässige Festlegung erzielt.In the case of torque wrenches, the respective release torque is set by adjusting a compression spring by turning the handle connected to a threaded spindle relative to the housing of the torque wrench. The housing is usually formed by a tube which is circular in diameter and carries the square drive at the front end and the handle at the rear end. In order to secure the set trigger torque against adjustment when using the torque wrench, the handle is fixed in the use position on the tubular housing. This is done, for example, by means of a clamping screw which presses radially on the housing tube, but does not achieve a reliable fixing because of the circular cylindrical surface of the tube.

Vorrichtungen zur lösbaren Festlegung eines zu Verstellzwecken verdrehbaren Handgriffes sind jedoch nicht nur bei Drehmomentschlüsseln erforderlich, sondern auch bei anderen Handwerkzeugen, beispielsweise Gripzangen.Devices for releasably fixing a handle that can be rotated for adjustment purposes are not only required for torque wrenches, but also for other hand tools, for example grip pliers.

Aus der WO 94/05463 ist eine Vorrichtung der eingangs beschriebenen Art bekannt, bei der Kugeln als Arretierstücke verwendet werden. Diese im Durchmesser kleinen Kugeln werden auf Scherung beansprucht und ermöglichen nur eine stufenweise Einstellung, da die zugehörigen Axialnuten nur in verhältnismäßig großen Abständen auf dem Rohr ausgebildet werden können.From WO 94/05463 a device of the type described at the outset is known, in which balls are used as locking pieces. These balls, which are small in diameter, are subjected to shear stress and only allow gradual adjustment, since the associated axial grooves can only be formed on the tube at relatively large distances.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur lösbaren Festlegung eines zu Verstellzwecken verdrehbaren Handgriffes auf einem Rohr mit kreiszylindrischer Mantelfläche zu schaffen, die mit geringem technischen Aufwand und damit preiswert eine nahezu stufenlose und sichere Festlegung bei gleichzeitig einfacher Handhabung ermöglicht.The invention has for its object to provide a device for releasably fixing a handle that can be rotated for adjustment purposes on a tube with a cylindrical cylindrical surface, which allows an almost infinitely variable and reliable fixing with simple handling with little technical effort and thus inexpensive.

Die Lösung dieser Aufgabenstellung durch die Erfindung ist dadurch gekennzeichnet, daß das Arretierstück als U-förmige Klaue ausgebildet ist, die mit den Stirnkanten ihrer Schenke in sekantialer Richtung in in axialer Richtung verlaufende Vertiefungen in der Mantelfläche des Rohres eingreift und die durch an einem auf dem Handgriff begrenzt verdrehbar gelagerten Verdrehring ausgebildete, kurvenförmige Steuerflächen zwischen ihrer Lösestellung und ihrer Arretierstellung verstellbar ist.The solution to this problem by the invention is characterized in that the locking piece is designed as a U-shaped claw, which engages with the front edges of their legs in the secantial direction in axially extending recesses in the lateral surface of the tube and which by at one on the Handle trained twisting ring trained, curved control surfaces between its release position and its locking position is adjustable.

Da die mit den Stirnkanten ihrer Schenke in sekantialer Richtung in Vertiefungen in der Mantelfläche des Rohres eingreifende Klaue durch die kurvenförmigen Steuerflächen des Verdrehringes eine formschlüssig gesteuerte Bewegung zwischen Lösestellung und Arretierstellung ausführt und die Schenkel in der Arretierstellung nicht auf Scherung, sondern auf Druck belastet sind, wird durch die erfindungsgemäße Ausgestaltung bei einfachster Konstruktion eine sehr hohe Klemmwirkung erzielt, wobei die in axialer Richtung verlaufenden Vertiefungen in der Mantelfläche des Rohres sehr eng beieinanderliegen können. Insgesamt kann auf sehr einfache Weise eine lösbare Festlegung des verdrehbaren Handgriffes auf der kreiszylindrischen Mantelfläche des Rohres erzielt werden, wobei durch die Ausbildung der in Umfangsrichtung unmittelbar aufeinanderfolgenden Vertiefungen eine quasistufenlose Festlegung und damit Einstellung des Handgriffes möglich ist.Since the claw engaging with the front edges of its legs in the secantial direction in depressions in the lateral surface of the tube executes a positively controlled movement between the release position and the locking position due to the curved control surfaces of the rotating ring and the legs in the locking position are not subjected to shear but pressure. a very high clamping effect is achieved by the configuration according to the invention with the simplest construction, the depressions running in the axial direction in the lateral surface of the tube being able to be very close to one another. All in all, a releasable fixing of the rotatable handle on the circular cylindrical outer surface of the tube can be achieved in a very simple manner, with the quasi-stepless fixing and thus setting of the handle being possible through the formation of the immediately successive depressions in the circumferential direction.

Bei einer bevorzugten Ausführungsform der Erfindung ist der Handgriff an einem Ende mit einer kreiszylindrischen Lagerfläche für den Verdrehring ausgebildet, der durch eine am Handgriff festlegbare Hülse in axialer Richtung gehalten ist. Diese Hülse ist gemäß einem weiteren Merkmal der Erfindung über mindestens eine federnde, am Handgriff angeordnete Zunge, die mit einem Zapfen von innen in eine Zapfenöffnung der Hülse eingreift, in axialer und in Umfangsrichtung am Handgriff festgelegt. Die Hülse kann mit einer Skala versehen sein.In a preferred embodiment of the invention, the handle is formed at one end with a circular cylindrical bearing surface for the rotating ring, which is held in the axial direction by a sleeve which can be fixed on the handle. According to a further feature of the invention, this sleeve is fixed axially and circumferentially on the handle via at least one resilient tongue arranged on the handle, which engages with a pin from the inside in a pin opening of the sleeve. The sleeve can be provided with a scale.

Weiterhin wird mit der Erfindung vorgeschlagen, den Handgriff mit der Lagerfläche für den Verdrehring und mit vorzugsweise zwei federnden Zungen zur Halterung der Hülse einstückig aus Kunststoff herzustellen.Furthermore, the invention proposes to manufacture the handle with the bearing surface for the rotating ring and preferably with two resilient tongues for holding the sleeve in one piece from plastic.

Um eine einseitige Belastung des Rohres und des Handgriffes in der Arretierstellung zu vermeiden, werden gemäß einem weiteren Merkmal der Erfindung im Handgriff mindestens zwei sich gegenüberliegende Klauen angeordnet. Diese sind gemäß einem weiteren Merkmal der Erfindung in Richtung ihrer Lösestellung durch jeweils eine Rückstellfeder belastet, um eine sichere Rückkehr aus der Arretierstellung zu gewährleisten.In order to avoid one-sided loading of the tube and the handle in the locking position, at least two opposing claws are arranged in the handle according to a further feature of the invention. According to a further feature of the invention, these are each loaded in the direction of their release position by a return spring in order to ensure a safe return from the locking position.

Der Verdrehring ist bei einer bevorzugten Weiterbildung begrenzt verdrehbar auf dem Handgriff gelagert, wobei der Verdrehwinkel des Verdrehringes vorzugsweise durch Anschläge am Verdrehring und/oder am Handgriff begrenzt ist. Schließlich wird mit der Erfindung vorgeschlagen, den Verdrehring in der jeweiligen Endstellung durch eine Rastfeder lösbar zu halten.In a preferred development, the rotating ring is mounted on the handle so that it can be rotated to a limited extent, the angle of rotation of the rotating ring preferably being limited by stops on the rotating ring and / or on the handle. Finally, the invention proposes to hold the rotating ring detachably in the respective end position by a detent spring.

Insgesamt ergibt sich durch die Erfindung eine konstruktiv einfache und damit preiswert herstellbare Vorrichtung zur lösbaren Festlegung eines zu Verstellzwecken nahezu stufenlos verdrehbaren Handgriffes auf einem Rohr mit kreiszylindrischer Mantelfläche, die in jeder Position eine funktionssichere Festlegung gewährleistet.Overall, the invention results in a structurally simple and therefore inexpensive to manufacture device for releasably fixing a handle that can be rotated almost infinitely for adjustment purposes on a tube with a circular cylindrical surface, which ensures a functionally reliable fixing in any position.

Auf der Zeichnung ist ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung dargestellt, und zwar zeigen:

Fig. 1
einen in der oberen Hälfte und im hinteren Teil in Längsrichtung geschnittenen Handgriff eines Drehmomentschlüssels, der verdrehbar auf dem hinteren Ende eines Rohres mit kreiszylindrischer Mantelfläche gelagert ist,
Fig. 2a
einen Querschnitt gemäß der Schnittlinie II - II in Fig. 1 durch den in der Arretierstellung befindlichen Handgriff,
Fig. 2b
einen der Fig. 2a entsprechenden Querschnitt in der Lösestellung,
Fig. 3a
einen Querschnitt gemäß der Schnittlinie III - III in Fig. 1 in der Arretierstellung,
Fig. 3b
einen der Fig. 3a entsprechenden Querschnitt in der Lösestellung und
Fig. 4
eine Seitenansicht der Hauptbestandteile der Vorrichtung in der Art eines Sprengbildes.
An exemplary embodiment of the device according to the invention is shown in the drawing, namely:
Fig. 1
a handle of a torque wrench cut in the longitudinal direction in the upper half and in the rear part, which is rotatably mounted on the rear end of a tube with a circular cylindrical outer surface,
Fig. 2a
2 shows a cross section according to section line II - II in FIG. 1 through the handle located in the locking position,
Fig. 2b
2 a cross section corresponding to FIG. 2a in the release position,
Fig. 3a
2 shows a cross section along the section line III-III in FIG. 1 in the locking position,
Fig. 3b
3a corresponding cross-section in the release position and
Fig. 4
a side view of the main components of the device in the manner of an explosive device.

Der beim Ausführungsbeispiel als Drehmomentschlüsselgriff dargestellte Handgriff 1 ist auf dem hinteren Ende eines als Schaft des Drehmomentschlüssels dienenden Rohres 2 mit kreiszylindrischer Mantelfläche drehbar gelagert. Der Handgriff 1 dient der Einstellung des jeweiligen Auslösedrehmoments des nicht näher gezeichneten Drehmomentschlüssels. Diese Verstellung des Auslösedrehmoments erfolgt durch eine Gewindestange 3, die im hinteren Ende des Handgriffes 1 einstellbar, aber unverdrehbar mit dem Handgriff 1 verbunden ist.The handle 1 shown in the exemplary embodiment as a torque wrench handle is rotatably mounted on the rear end of a tube 2 serving as a shaft of the torque wrench with a circular cylindrical outer surface. The handle 1 is used to set the respective trigger torque of the torque wrench, not shown. This adjustment of the trigger torque is carried out by a threaded rod 3, which is adjustable in the rear end of the handle 1, but is non-rotatably connected to the handle 1.

Beim Ausführungsbeispiel erfolgt diese Verbindung mit Hilfe eines Justierelementes 4, das in den beim Ausführungsbeispiel aus Kunststoff hergestellten Handgriff 1 eingespritzt und damit mit diesem unverdrehbar verbunden ist. In diesem Justierelement 4 sind lose Kupplungsstücke 5 angeordnet, die über eine Stirnverzahnung mit der Stirnverzahnung einer Kupplungsscheibe 6 zusammenwirken, die ihrerseits unverdrehbar auf einem Mehrkantabschnitt 3a der Gewindestange 3 angeordnet und durch eine Fixiermutter 7 gehalten ist.In the exemplary embodiment, this connection is made with the aid of an adjusting element 4, which is injected into the handle 1, which is made of plastic in the exemplary embodiment, and is therefore non-rotatably connected to it. Loose coupling pieces 5 are arranged in this adjusting element 4, which cooperate via an end toothing with the end toothing of a clutch disc 6, which in turn is arranged non-rotatably on a polygonal section 3a of the threaded rod 3 and is held by a fixing nut 7.

Die Anordnung des Justierelementes 4 auf der Gewindestange 3 erfolgt durch eine Gewindehülse 8, die sich an einer auf der Gewindestange 3 angeordneten Basisscheibe 9 abstützt und der Basiseinstellung des Drehmomentschlüssels dient.The adjustment element 4 is arranged on the threaded rod 3 by means of a threaded sleeve 8, which is supported on a base plate 9 arranged on the threaded rod 3 and serves for the basic setting of the torque wrench.

Mit den voranstehend beschriebenen Bauteilen kann der Drehmomentschlüssel eingestellt werden. Der Zugang zu den Bauteilen wird anschließend durch eine das hintere Griffende verschließende Kappe 10 versperrt.The torque wrench can be adjusted with the components described above. Access to the components is then blocked by a cap 10 closing the rear end of the handle.

Der auf dem hinteren Ende des Rohres 2 unter Mitnahme der Gewindestange 3 verdrehbare Handgriff 1 ist am vorderen Ende mit einer kreiszylindrischen Lagerfläche 1a ausgebildet, auf der ein Verdrehring 11 begrenzt verdrehbar gelagert ist. Um ein axiales Abgleiten des Verdrehringes 11 von der Lagerfläche 1a zu verhindern, ist eine Hülse 12 vorgesehen, die unverdrehbar am Handgriff 1 gehalten ist, und zwar mit Hilfe von federnden Zungen 1b, die beim Ausführungsbeispiel einstückig an das vordere Ende der die Lagerfläche 1a bildenden Verlängerung des Handgriffes 1 angeformt sind. Jede Zunge 1b ist mit einem radial nach außen weisenden Zapfen 1c versehen, der von innen her in eine Zapfenöffnung der Hülse 12 eingreift und auf diese Weise diese Hülse 12 sowohl in axialer Richtung als auch in Umfangsrichtung am Handgriff 1 derart festlegt, daß sich der Verdrehring 11 zwischen Hülse 12 und Handgriff 1 verdrehen läßt.The handle 1, which can be rotated on the rear end of the tube 2 while driving the threaded rod 3, is formed at the front end with a circular cylindrical bearing surface 1 a, on which a rotating ring 11 is rotatably supported to a limited extent. In order to prevent the rotating ring 11 from sliding axially from the bearing surface 1a, a sleeve 12 is provided which is held non-rotatably on the handle 1, with the aid of resilient tongues 1b which, in the exemplary embodiment, form one piece with the front end of the bearing surface 1a Extension of the handle 1 are formed. Each tongue 1b is provided with a radially outwardly pointing pin 1c which engages from the inside in a pin opening of the sleeve 12 and in this way fixes this sleeve 12 both in the axial direction and in the circumferential direction on the handle 1 in such a way that the rotating ring 11 can rotate between sleeve 12 and handle 1.

Im Bereich des Verdrehringes 11 sind im Handgriff 1 Arretierstücke angeordnet, die beim Ausführungsbeispiel jeweils als U-förmige Klaue 13 ausgebildet sind. Jede dieser Klauen 13 ist durch eine radial nach außen wirkende Rückstellfeder 14 belastet. Im Verdrehring 11 ist weiterhin eine Rastfeder 15 angeordnet, deren Wirkung nachfolgend beschrieben werden wird.In the area of the rotating ring 11, locking pieces are arranged in the handle, each of which is designed as a U-shaped claw 13 in the exemplary embodiment. Each of these claws 13 is loaded by a return spring 14 acting radially outwards. A detent spring 15 is also arranged in the rotating ring 11, the effect of which will be described below.

Wie am besten die Fig. 2a und 2b sowie 3a und 3b erkennen lassen, durchgreift jede im Querschnitt U-förmige Klaue 13 mit ihren Schenkeln 13a im Handgriff 1 ausgebildete Aussparungen, so daß die Stirnkanten der Schenkel 13a mit der kreiszylindrischen Mantelfläche des Rohres 2 in Berührung treten können, welches im Bereich der Klauen 13 mit Vertiefungen 2a versehen ist. Diese Vertiefungen 2a sind beim Ausführungsbeispiel als in Längsrichtung des Rohres 2 verlaufende, durch Rändelung entstandene Rillen ausgeführt, die voneinander in Umfangsrichtung einen sehr kleinen Abstand haben, so daß sie eine nahezu stufenlose Festlegung des verdrehbaren Handgriffes 1 auf dem Rohr 2 ermöglichen.As can best be seen in FIGS. 2a and 2b as well as 3a and 3b, each claw 13 with a cross-section U-shaped with its legs 13a engages in the handle 1, so that the end edges of the legs 13a with the circular cylindrical surface of the tube 2 in Can come into contact, which is provided in the area of the claws 13 with depressions 2a. These depressions 2a are in the embodiment as in the longitudinal direction of the Tube 2 extending grooves created by knurling, which have a very small distance from each other in the circumferential direction, so that they enable an almost infinitely variable fixing of the rotatable handle 1 on the tube 2.

Um die Klauen 13 in radialer Richtung zwischen einer Lösestellung gemäß Fig. 3b und einer Arretierstellung gemäß Fig. 3a zu verstellen, wirkt der Verdrehring 11 über kurvenförmige Steuerflächen 11a und 11b mit dem Steg 13b der jeweiligen Klaue 13 zusammen. Befindet sich der Verdrehring 11 in der in Fig. 3a gezeichneten Arretierstellung, drücken die Steuerflächen 11a die Klauen 13 mit den Kanten ihrer Schenkel 13a in die Vertiefungen 2a des Rohres 2. In dieser Stellung ist der Handgriff 1 unverdrehbar auf dem Rohr 2 festgelegt.In order to adjust the claws 13 in the radial direction between a release position according to FIG. 3b and a locking position according to FIG. 3a, the rotating ring 11 interacts with the web 13b of the respective claw 13 via curved control surfaces 11a and 11b. If the rotating ring 11 is in the locking position shown in FIG. 3a, the control surfaces 11a press the claws 13 with the edges of their legs 13a into the depressions 2a of the tube 2. In this position the handle 1 is fixed on the tube 2 in a non-rotatable manner.

Wird dagegen der Verdrehring 11 aus der in Fig. 3a gezeichneten Arretierstellung im Gegenuhrzeigersinn in die in Fig. 3b gezeichnete Lösestellung verdreht, gelangen die Stege 13b der Klauen 13 in den Bereich der Steuerflächen 11b des Verdrehringes 11. Im Bereich dieser Steuerflächen 11b können die Klauen 13 eine radial nach außen gerichtete Lösebewegung durchführen, die durch die Rückstellfedern 14 bewirkt wird. In dieser Lösestellung befinden sich die Stirnkanten der Schenkel 13a im Abstand zur kreiszylindrischen Mantelfläche des Rohres 2, so daß der Handgriff 1 auf dem Rohr 2 verdreht werden kann.If, on the other hand, the rotating ring 11 is rotated counterclockwise from the locking position shown in FIG. 3a into the released position shown in FIG. 3b, the webs 13b of the claws 13 reach the area of the control surfaces 11b of the rotating ring 11. In the area of these control surfaces 11b, the claws can 13 perform a radially outward release movement, which is caused by the return springs 14. In this release position, the end edges of the legs 13a are at a distance from the cylindrical surface of the tube 2, so that the handle 1 can be rotated on the tube 2.

Um den Verdrehwinkel des Verdrehringes 11 relativ zum Handgriff 1 zu begrenzen, sind am Verdrehring 11 Anschläge 11c vorgesehen, die mit Anschlägen 1d am Handgriff 1 zusammenwirken und den Verdrehwinkel auf etwa 90° begrenzen, wie dies aus den Fig. 2a und 2b hervorgeht. In der jeweiligen Endstellung, nämlich in der Arretierstellung gemäß Fig. 2a und in der Lösestellung gemäß Fig. 2b greift die zwischen den Anschlägen 11c am Verdrehring 11 angeordnete Rastfeder 15 in Rastvertiefungen 1e ein, die am Handgriff 1 ausgebildet sind. Auf diese Weise wird sichergestellt, daß nicht nur die jeweilige Endstellung kraftschlüssig gesichert wird, sondern daß der Benutzer des Handgriffes durch ein akustisches Signal darauf hingewiesen wird, daß sich der Verdrehring 11 in der jeweils gewünschten Endstellung befindet.In order to limit the angle of rotation of the rotating ring 11 relative to the handle 1, stops 11c are provided on the rotating ring 11, which cooperate with stops 1d on the handle 1 and limit the angle of rotation to approximately 90 °, as can be seen from FIGS. 2a and 2b. In the respective end position, namely in the locking position according to FIG. 2a and in the release position according to FIG. 2b, the catch spring 15 arranged between the stops 11c on the rotating ring 11 engages in catch recesses 1e which are formed on the handle 1. In this way it is ensured that not only the respective end position is non-positively secured, but that the user of the handle is informed by an acoustic signal that the rotating ring 11 is in the desired end position.

Wie insbesondere aus Fig. 3a hervorgeht, bewirken die in sekantialer Richtung auf die zylindrische Mantelfläche des Rohres 2 einwirkenden Stirnkanten der Schenke 13a der Klauen 13 trotz der einfachen Konstruktion eine sichere und zuverlässige Festlegung des Handgriffes 1 in der jeweiligen Stellung auf dem Rohr 2, da die Klauen 13 großflächig und formschlüssig in der Arretierstellung gehalten werden. Das Überführen der Klauen 13 zwischen Arretierstellung und Lösestellung erfolgt auf besonders einfache Weise durch Verdrehen des Verdrehringes 11, der mit seinen großflächigen Steuerflächen 11a und 11b eine zuverlässige Steuerung der in radialer Richtung erfolgenden Bewegung der Klauen 13 bewirkt.As can be seen in particular from Fig. 3a, the front edges of the legs 13a of the claws 13 acting in secantial direction on the cylindrical outer surface of the tube 2, despite the simple construction, ensure a secure and reliable fixing of the handle 1 in the respective position on the tube 2, since the claws 13 are held over a large area and positively in the locking position. The claws 13 are transferred between the locking position and the release position in a particularly simple manner by turning the rotating ring 11, which, with its large-area control surfaces 11a and 11b, reliably controls the movement of the claws 13 in the radial direction.

Bei der Anwendung des voranstehend beschriebenen Vorrichtung zur lösbaren Festlegung des Handgriffes 1 auf dem Rohr 2 für Drehmomentschlüssel ergibt sich somit eine sichere Festlegung des jeweils eingestellten Auslösedrehmoments, wobei durch die engen Toleranzen der in der Art einer Feinverzahnung ausgebildeten Vertiefungen 2a eine nahezu stufenlose Einstellung möglich ist. Wie insbesondere die Fig. 4 erkennen läßt, ist eine einfache Vormontage des Handgriffes möglich, wobei die zwischen der zylindrischen Lagerfläche 1a des Handgriffes 1 und dem Verdrehring 11 angeordneten Arretierelemente und Federn sicher untergebracht sind. Die Feineinstellung des Drehmomentschlüssels kann dadurch erleichtert werden, daß die Hülse 12 gemäß der Darstellung in den Fig. 1 und 4 mit einer Skala versehen wird, beispielsweise einer Nonius-Skala. Da der Handgriff 1 einstückig aus Kunststoff hergestellt werden kann, ergibt sich eine preiswerte Herstellmöglichkeit. Auch der Verdrehring 11 und die Hülse 12 werden vorzugsweise aus Kunststoff hergestellt.When using the device described above for releasably fixing the handle 1 on the tube 2 for torque wrenches, this results in a reliable definition of the respectively set trigger torque, whereby an almost stepless adjustment is possible due to the narrow tolerances of the recesses 2a designed in the manner of fine teeth . As can be seen in particular in FIG. 4, simple pre-assembly of the handle is possible, the locking elements and springs arranged between the cylindrical bearing surface 1 a of the handle 1 and the rotating ring 11 being securely accommodated. The fine adjustment of the torque wrench can be facilitated by providing the sleeve 12 with a scale as shown in FIGS. 1 and 4, for example a vernier scale. Since the handle 1 can be made in one piece from plastic, there is an inexpensive manufacturing possibility. The rotating ring 11 and the sleeve 12 are also preferably made of plastic.

Bezugszeichenliste:Reference symbol list:

11
HandgriffHandle
1a1a
Lagerflächestorage area
1b1b
Zungetongue
1c1c
ZapfenCones
1d1d
Anschlagattack
1e1e
RastvertiefungRest recess
22nd
Rohrpipe
2a2a
Vertiefungdeepening
33rd
GewindestangeThreaded rod
3a3a
MehrkantabschnittPolygonal section
44th
JustierelementAdjustment element
55
KupplungsstückCoupling piece
66
KupplungsscheibeClutch disc
77
FixiermutterFixing nut
88th
GewindehülseThreaded sleeve
99
BasisscheibeBase disc
1010th
Kappecap
1111
VerdrehringTwist ring
11a11a
SteuerflächeControl surface
11b11b
SteuerflächeControl surface
11c11c
Anschlagattack
1212th
HülseSleeve
1313
Klaueclaw
13a13a
Schenkelleg
13b13b
Stegweb
1414
RückstellfederReturn spring
1515
RastfederDetent spring

Claims (9)

Vorrichtung zur lösbaren Festlegung eines zu Verstellzwecken verdrehbaren Handgriffes (1), vorzugsweise eines Drehmomentschlüssels, auf einem Rohr (2) mit kreiszylindrischer Mantelfläche, wobei im Handgriff (1) mindestens ein in radialer Richtung zum Rohr (2) zwischen einer Lösestellung und einer Arretierstellung verstellbares Arretierstück angeordnet ist, das in der Arretierstellung in Vertiefungen (2a) in der Mantelfläche des Rohres (2) eingreift,
dadurch gekennzeichnet,
daß das Arretierstück als U-förmige Klaue (13) ausgebildet ist, die mit den Stirnkanten ihrer Schenkel (13a) in sekantialer Richtung in in axialer Richtung verlaufende Vertiefungen (2a) in der Mantelfläche des Rohres (2) eingreift und die durch an einem auf dem Handgriff (1) begrenzt verdrehbar gelagerten Verdrehring (11) ausgebildete, kurvenförmige Steuerflächen (11a, 11b) zwischen ihrer Lösestellung und ihrer Arretierstellung verstellbar ist.
Device for the releasable fixing of a handle (1), preferably a torque wrench, which can be rotated for adjustment purposes, on a tube (2) with a circular cylindrical outer surface, with at least one adjustable in the handle (1) in the radial direction to the tube (2) between a release position and a locking position Arresting piece is arranged, which engages in the locking position in depressions (2a) in the lateral surface of the tube (2),
characterized,
that the locking piece is designed as a U-shaped claw (13), which engages with the end edges of its legs (13a) in the secantial direction in the axial direction recesses (2a) in the lateral surface of the tube (2) and through on one The twist ring (11) of the handle (1), which is mounted so as to be rotatable to a limited extent, can be configured to have curved control surfaces (11a, 11b) between its release position and its locking position.
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Handgriff (1) an einem Ende mit einer kreiszylindrischen Lagerfläche (1a) für den Verdrehring (11) ausgebildet ist, der durch eine am Handgriff (1) festlegbare Hülse (12) in axialer Richtung gehalten ist.Apparatus according to claim 1, characterized in that the handle (1) is formed at one end with a circular cylindrical bearing surface (1a) for the rotating ring (11) which is held in the axial direction by a sleeve (12) which can be fixed on the handle (1) is. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Hülse (12) über mindestens eine federnde, am Handgriff (1) angeordnete Zunge (1b), die mit einem Zapfen (1c) von innen in eine Zapfenöffnung der Hülse (12) eingreift, in axialer und in Umfangsrichtung am Handgriff (1) festgelegt ist.Device according to claim 2, characterized in that the sleeve (12) has at least one resilient tongue (1b) arranged on the handle (1) and engaging with a pin (1c) from the inside into a pin opening of the sleeve (12) is fixed axially and in the circumferential direction on the handle (1). Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Hülse (12) mit einer Skala versehen ist.Device according to claim 2, characterized in that the sleeve (12) is provided with a scale. Vorrichtung nach mindestens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Handgriff (1) mit der Lagerfläche (1a) für den Verdrehring (11) und mit vorzugsweise zwei federnden Zungen (1b) zur Halterung der Hülse (12) einstückig aus Kunststoff hergestellt ist.Device according to at least one of claims 1 to 4, characterized in that the handle (1) with the bearing surface (1a) for the Rotating ring (11) and preferably with two resilient tongues (1b) for holding the sleeve (12) is made in one piece from plastic. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß im Handgriff (1) mindestens zwei sich gegenüberliegende Klauen (13) angeordnet sind.Device according to claim 1, characterized in that at least two mutually opposite claws (13) are arranged in the handle (1). Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Klauen (13) in Richtung ihrer Lösestellung durch jeweils eine Rückstellfeder (14) belastet sind.Device according to claim 6, characterized in that the claws (13) are each loaded in the direction of their release position by a return spring (14). Vorrichtung nach mindestens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Verdrehwinkel des Verdrehringes (11) durch Anschläge (11c, 1d) am Verdrehring (11) und/oder am Handgriff (1) begrenzt ist.Device according to at least one of claims 1 to 7, characterized in that the angle of rotation of the rotating ring (11) is limited by stops (11c, 1d) on the rotating ring (11) and / or on the handle (1). Vorrichtung nach mindestens einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Verdrehring (11) in der jeweiligen Endstellung durch eine Rastfeder (15) lösbar gehalten ist.Device according to at least one of claims 1 to 8, characterized in that the rotating ring (11) is detachably held in the respective end position by a detent spring (15).
EP95110260A 1994-08-16 1995-07-01 Device for the releasable connection of a handle being turnable for adjusting purposes Expired - Lifetime EP0697268B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4428972 1994-08-16
DE4428972A DE4428972C1 (en) 1994-08-16 1994-08-16 Device for releasably fixing a handle that can be rotated for adjustment purposes

Publications (2)

Publication Number Publication Date
EP0697268A1 true EP0697268A1 (en) 1996-02-21
EP0697268B1 EP0697268B1 (en) 1998-09-09

Family

ID=6525777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110260A Expired - Lifetime EP0697268B1 (en) 1994-08-16 1995-07-01 Device for the releasable connection of a handle being turnable for adjusting purposes

Country Status (3)

Country Link
EP (1) EP0697268B1 (en)
DE (2) DE4428972C1 (en)
ES (1) ES2122403T3 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3441189A1 (en) * 2017-08-08 2019-02-13 Matatakitoyo Tool Co., Ltd. Torque-adjusting apparatus

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Publication number Priority date Publication date Assignee Title
DE20119801U1 (en) 2001-12-06 2002-02-14 Hazet Werk Zerver Hermann Shaft for a torque wrench
CN103372837A (en) * 2012-04-19 2013-10-30 天纳克-埃贝赫(大连)排气***有限公司 Wrench capable of eliminating torque errors
CN103921243A (en) * 2014-04-24 2014-07-16 周维保 Hand-cranked spanner with replaceable spanner head
CN105459004B (en) * 2014-09-11 2017-07-04 瞬丰实业有限公司 Torque adjusting device and a kind of instrument with this torque adjusting device
DK2998071T3 (en) * 2014-09-18 2019-05-13 Matatakitoyo Tool Co Ltd Wrench with lockable torque adjustment mechanism

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US2704472A (en) * 1955-03-22 Mined torque release means
US3016773A (en) * 1958-12-12 1962-01-16 Woods Robert Glen Predetermined torque release wrench
US3270594A (en) * 1964-07-29 1966-09-06 Torque Controls Inc Predetermined torque release wrench
EP0274576A2 (en) * 1987-01-16 1988-07-20 Consolidated Devices, Inc. Improved hand grip drive for torque wrenches
WO1994005463A1 (en) 1992-08-31 1994-03-17 Sandvik Ab Lockable spring tightening device

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US2768547A (en) * 1954-04-28 1956-10-30 Printing Machinery Company Predetermined torque release hand tool
DE3143080C2 (en) * 1981-10-30 1983-09-29 Fa. Carl Freudenberg, 6940 Weinheim Handle attachment, especially for brooms
DE3518661C2 (en) * 1985-05-24 1994-04-28 Hans Mesenhoeller Wrench
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Publication number Priority date Publication date Assignee Title
US2704472A (en) * 1955-03-22 Mined torque release means
US3016773A (en) * 1958-12-12 1962-01-16 Woods Robert Glen Predetermined torque release wrench
US3270594A (en) * 1964-07-29 1966-09-06 Torque Controls Inc Predetermined torque release wrench
EP0274576A2 (en) * 1987-01-16 1988-07-20 Consolidated Devices, Inc. Improved hand grip drive for torque wrenches
WO1994005463A1 (en) 1992-08-31 1994-03-17 Sandvik Ab Lockable spring tightening device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3441189A1 (en) * 2017-08-08 2019-02-13 Matatakitoyo Tool Co., Ltd. Torque-adjusting apparatus

Also Published As

Publication number Publication date
ES2122403T3 (en) 1998-12-16
EP0697268B1 (en) 1998-09-09
DE4428972C1 (en) 1996-02-08
DE59503511D1 (en) 1998-10-15

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