EP1825959B1 - Drehmomentschlüssel - Google Patents

Drehmomentschlüssel Download PDF

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Publication number
EP1825959B1
EP1825959B1 EP07001235A EP07001235A EP1825959B1 EP 1825959 B1 EP1825959 B1 EP 1825959B1 EP 07001235 A EP07001235 A EP 07001235A EP 07001235 A EP07001235 A EP 07001235A EP 1825959 B1 EP1825959 B1 EP 1825959B1
Authority
EP
European Patent Office
Prior art keywords
handle
torque wrench
shaft
longitudinal
wrench according
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.)
Active
Application number
EP07001235A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1825959A1 (de
Inventor
Thomas Beyert
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
Original Assignee
Hazet Werk Hermann Zerver GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hazet Werk Hermann Zerver GmbH and Co KG filed Critical Hazet Werk Hermann Zerver GmbH and Co KG
Publication of EP1825959A1 publication Critical patent/EP1825959A1/de
Application granted granted Critical
Publication of EP1825959B1 publication Critical patent/EP1825959B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
    • B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
    • B25B23/1427—Arrangement 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 torque wrench according to the features in the preamble of claim 1.
  • Such a torque wrench counts through the DE-AS 23 09 618 to the state of the art. It has a tubular shaft, a handle at a first end relatively rotatable and limited longitudinally displaceable handle, arranged at the other end of the shaft 2 Umschaltknarre and in the shaft by means of a spindle and a spindle nut comprehensive clamping unit biased to a short trip acting helical compression spring.
  • the outer surface of the shaft is provided in the longitudinal region of the handle with rounded longitudinal grooves in which the handle on the shaft fixing balls are pressed as locking elements.
  • the handle of the torque wrench is constructed in several parts. It first comprises an adjusting tube, which surrounds the end of the shaft facing away from the Umschaltknarre sliding fit. In the adjustment are designed accordingly Holes supported balls, which protrude into the longitudinal grooves of the shaft.
  • the adjustment tube is enclosed by a longitudinally movable handle tube, which is secured against rotation relative to the adjustment tube. Between the adjusting tube and the handle tube, a helical compression spring is arranged, which permanently loads the handle tube in the direction of the end of the torque wrench facing away from the reversing ratchet.
  • the multi-part of the handle requires a higher production cost and a montage-appropriate time-accurate provision of various items such as adjustment, balls, helical compression spring, handle tube and pins to secure the rotation of the handle tube relative to the adjustment.
  • Scales are provided on the outer circumference of the shaft and on the outer circumference of the length of the adjustment tube projecting relative to the grip tube, with the aid of which the respectively desired release torque on the torque wrench can be adjusted.
  • the handle tube is first moved on the adjustment tube in the direction of the Umschaltknarre against the restoring force of the helical compression spring. Due to an inner radial extension of the handle tube now the balls have the possibility of a radial displacement, so that the handle against the shaft can be rotated and moved and in this way a new release torque is adjustable. Subsequently, the handle tube needs only to be released.
  • the arranged between the adjustment tube and the handle tube helical compression spring now ensures that the handle tube automatically returns to its original position and thus pushes the balls back into the longitudinal grooves via a corresponding conical design of the inner surface of the handle tube.
  • the handle is secured in a subsequent use of the torque wrench against rotation and an adjustment of the set release torque.
  • the bias of the helical compression spring in the shaft is realized by a clamping unit having a spindle and an end of the shaft facing away from the reversing ratchet in this fixed spindle nut.
  • the spindle in turn is rotatably fixed in a holder which is inserted into the adjusting tube.
  • the spindle is accessible and can be rotated, so that the basic setting of the torque is adjustable.
  • the invention is - starting from the prior art - the object of the invention to provide a torque wrench, which is simpler, consists of fewer parts and can be easily manufactured and assembled.
  • the invention now provides at least one locking element which is formed from a cylindrical roller extending with its longitudinal axis parallel to the longitudinal axis of the shaft.
  • This cylindrical roller lies in a slot-shaped recess adapted to its contour directly in the one-piece handle. In this way, eliminates an additional adjustment tube as in the prior art.
  • a cylindrical roller leads to a lower radial load compared to a point contact when using balls.
  • a locking sleeve made of plastic can be used to clamp the handle also made of plastic on the cylindrical roller on the shaft or release the displacement of the handle relative to the shaft, so that the tripping torque is variable.
  • the cylindrical roller In the clamped state of the handle on the shaft, the cylindrical roller is pressed by the inner surface of the locking sleeve in one of the longitudinal grooves.
  • These have a rounded cross-section in a preferred embodiment and in adaptation to the cylindrical roller.
  • the number of longitudinal grooves corresponds to a circumferential decimal scale graduation directly on the surface of the key head facing the end of the handle.
  • the key head is preferably a changeover ratchet.
  • the locking sleeve To change the tripping torque, the locking sleeve must be rotated relative to the handle. Is then the cylindrical roller with a cross section in the preferably rounded receiving trough in the inner surface of the locking sleeve has been made to cover the front, the cylindrical roller has a radial Ausweichnnenkeit. Thereby, the handle can be rotated and moved relative to the shaft, so that a new release torque can be adjusted.
  • the shape of the cylindrical roller and the cross-sectional configuration of the longitudinal grooves and the receiving trough in the inner surface of the locking sleeve facilitate the radial deflection possibility of the cylindrical roller.
  • the locking sleeve is again rotated relative to the handle and thereby pressed the cylindrical roller in one of the longitudinal grooves. When this position is reached, the handle is locked on the shaft.
  • the torque wrench can be used with the newly set tripping torque.
  • An advantageous embodiment of the invention consists in the features of claim 2. Thereafter, two circumferentially offset by 180 ° cylindrical rollers provided in recesses of the handle and accordingly arranged two diametrically opposite inner receiving troughs in the locking sleeve.
  • this symmetrical design has the advantage that gegentechnische components can be manufactured, which can be assembled easily during assembly.
  • the invention does not exclude that more than two cylindrical rollers and two receiving troughs can be provided.
  • the locking sleeve comprises a reduced diameter nozzle of the handle and connects with a conical outer longitudinal portion of a correspondingly inclined conical end portion of the handle. In this way, a smooth transition from the outer surface of the shaft is ensured on the handle and the locking sleeve.
  • the torque wrench according to the invention is provided according to the features of claim 5, that the locking sleeve with a widened inside diameter and stepped here stub encloses a paragraph and a collar on the handle.
  • paragraph at least one radially directed stepped recess is provided.
  • a latching element and a radially acting on this latching element outward compression spring are incorporated.
  • the inner surface of the paragraph cross-section of the nozzle two adapted to the locking element, incorporated in the circumferential spacing arranged locking recesses.
  • the locking element engages audibly and palpably each in a detent recess.
  • the user thus has a further orientation aid for determining the current operating state of the torque wrench.
  • the circumferential distance of the locking recesses corresponds approximately to the circumferential length of the Begrenzungsnut.
  • the locking element is formed by a parallel with the longitudinal axis of the shaft aligned with its longitudinal axis cylindrical pin and there are also the detent recesses in alignment the cylindrical pins are rounded.
  • the comfort in the handling of the torque wrench with the features of claim 8 is further increased by two 180 ° staggered cylinder pins are provided with compression springs and four detent recesses.
  • an O-ring is embedded in a circumferential groove of the neck of the handle.
  • This O-ring in the form of in particular an O-ring made of rubber or suitable plastic can perceive by its coloring an identification function to clearly distinguish torque wrench of different sizes from each other.
  • this O-ring still takes over the function of protection against the ingress of dirt into the annular gap between the neck of the handle and the locking sleeve and thus in the range of the cylindrical rollers.
  • the features of claim 10 are used for adjustment and the basic adjustment of a torque.
  • the torque is initially built up by the corresponding biasing of the helical compression spring on the adjusting ring and the spindle.
  • the adjusting ring is not yet coupled with the handle. This is suspended towards the key head.
  • the outer toothing of the adjusting ring is joined with an internal toothing in the handle by the handle is moved away from the key head. A further rotation of the adjusting ring is then no longer possible.
  • the adjusting ring is in particular by two pins, preferably threaded pins, which are screwed radially from the outside by the handle in the adjusting ring, fixed.
  • the front of the handle can be closed by a suitable cap.
  • the torque wrench 1 has at one end 2 a handle 3 made of plastic, which is enclosed by a relative to the handle 3 rotatable locking sleeve 4, also made of plastic.
  • the handle 3 encloses a tubular shaft 5 made of steel, which has a pin 6 at the end of a flattened length section 7 with a known and therefore not described in detail key head 8 is pivotally connected in the form of a Umschaltknarre.
  • Both the handle 3 and the locking sleeve 4 have recesses 9 and 10 on the periphery to improve grip safety.
  • a longitudinally extending torque scale 12 and on the surface 13 of a conical end portion 14 of the handle 3 are provided on the front side of the handle 3.
  • FIG. 6 is located in the interior of the shaft 5, a helical compression spring 16 whose first end 17 is acted upon axially by a later explained in more detail clamping unit 18 and the other unspecified illustrated second end on a likewise not illustrated in detail short-range release in which the key head 8 adjacent 2.
  • end 19 of shaft 5 is supported ( Fig.1 ).
  • FIG. 4 shows that between the torque scale 12 on the shaft 5 and the lying in the handle 3 1st end 20 in the outer surface 11 of the shaft 5 incorporated, rounded in cross-section longitudinal grooves 21 are provided.
  • the number of longitudinal grooves 21 corresponds to the points of the decimal scale 15 at the conical end portion 14 of the handle.
  • the locking sleeve 4 has an outer cylindrical length portion 22 and an outer conical length portion 23.
  • the conical longitudinal section 23 closes according to the FIGS. 1 . 5 and 6 to the corresponding inclined conical end portion 14 of the handle 3 at.
  • an O-ring 24 in the form of an O-ring is embedded in a circumferential groove 25 of a cylindrical connecting piece 26 of the handle 3 (see also FIG Fig. 2 . 7 and 8 ).
  • FIGS. 6 and 7 to 9 show that the nozzle 26 of the handle 3 merges into a larger diameter shoulder 27, to which a collar 28 of the handle 3 connects. Adjacent to the paragraph 27 are located in 180 ° circumferential offset two longitudinal slot-shaped recesses 29 in the socket 26th
  • slot-shaped recesses 29 are, like the Figures 2 . 7 and 9 indicate, two circumferentially extending, offset by 180 ° to each other, provided at the end closed Begrenzungsnuten 30 in the outer surface 31 of the nozzle 26.
  • the locking sleeve 4 has an enlarged inside diameter and stepped here stub 33.
  • the inner surface 34 of the locking sleeve 4 are adjacent to the nozzle 33 two 180 ° offset from each other, thus diametrically opposite, rounded in cross-section receiving troughs 35 are provided.
  • FIG. 11 and 12 further show that in the inner surface 36 of the shoulder 27 cross-section nozzle 33 of the locking sleeve 4 four in cross-section rounded detent recesses 37 are incorporated.
  • detent recesses 37 offset diametrically from one another by 180 ° lie in the longitudinal plane of the receiving troughs 35 (FIG. Fig. 12 ), while two further latching recesses 37 are arranged offset to the receiving wells 35 by 60 °.
  • the circumferential distance between the locking recesses 37 corresponds approximately to the circumferential length of the Begrenzungsnuten 30th
  • FIGS. 2 and 6 show that in the slot-shaped recesses 29 in the socket 26 of the handle 3 locking elements in the form of cylindrical rollers 38 are incorporated.
  • the longitudinal axes of the cylindrical rollers 38 extend parallel to the longitudinal axis of the shaft 5.
  • the diameter of the cylindrical rollers 38 which are adapted to the longitudinal grooves 21 with respect to their contour is such that when the inner surface 34 of the locking sleeve 4 abuts against the cylindrical rollers 38, these are pressed into the longitudinal grooves 21 be, so that a rotation of the handle 3 relative to the shaft 5 is not possible.
  • the rotation of the locking sleeve 4 relative to the Handle 3 is bounded by two pins 39 ( Fig.
  • the stepped recesses 32 in the paragraph 27 of the handle 3 each receive a compression spring 41 in the form of a helical compression spring and a cylindrical pin 42, whose longitudinal axes extend parallel to the longitudinal axis of the shaft 5.
  • These cylindrical pins 42 cooperate with the latching recesses 37 in the inner surface 36 of the paragraph 27 cross-section of the nozzle 33 of the locking sleeve 4 together.
  • the clamping unit 18 ( Figure 6 ) comprises a spindle 43 which runs in a spindle nut 44, which is fastened by means of two pins 45 in the first end 20 of the shaft 5.
  • the spindle 43 is supported on the one hand via a pressure sleeve 46 at the first end 17 of the helical compression spring 16 and on the other hand is clamped in an adjusting ring 47.
  • This has on the periphery of an outer toothing 48, which is available with an internal toothing 49 in the handle 3 ( Figure 8 ).
  • Two setscrews 50 serve to fix the adjusting ring 47 on the handle 3. With a cap 51 made of plastic, the front side of the handle 3 can be closed.
  • the cap 51 is removed and the handle 3 after releasing the setscrews 50 so far moved in the direction of the key head 8 that the outer teeth 48 on Justierring 47 from the internal teeth 49 in the handle 3 slides.
  • the torque can be adjusted by turning the spindle 43.
  • the handle 3 are pulled back, the outer teeth 48 joined with the internal teeth 49 and then screwed the threaded pins 50.
  • the cap 51 is used.
  • the locking sleeve 4 is rotated so that its inner surface 34 presses the cylindrical rollers 38 in two mutually opposite longitudinal grooves 21 in the shaft 5. A rotation of the handle 3 relative to the shaft 5 is not possible. The longitudinal displacement of the handle 3 is excluded by the set screws 50 between the adjusting ring 47 and the handle 3.
  • the locking sleeve 4 is rotated so far that the receiving wells 35 as shown in the FIG. 6 the cylindrical rollers 38 are frontally opposite.
  • the cylindrical rollers 38 have the possibility of being able to displace radially when the handle 3 is rotated relative to the shaft 5.
  • the locking sleeve 4 is again rotated so far back that the cylindrical rollers 38 are pressed into the longitudinal grooves 21 and thus they are fixed between the inner surface 34 of the locking sleeve 4 and the longitudinal grooves 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP07001235A 2006-02-28 2007-01-20 Drehmomentschlüssel Active EP1825959B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202006003274U DE202006003274U1 (de) 2006-02-28 2006-02-28 Drehmomentschlüssel

Publications (2)

Publication Number Publication Date
EP1825959A1 EP1825959A1 (de) 2007-08-29
EP1825959B1 true EP1825959B1 (de) 2010-01-27

Family

ID=36372095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07001235A Active EP1825959B1 (de) 2006-02-28 2007-01-20 Drehmomentschlüssel

Country Status (4)

Country Link
EP (1) EP1825959B1 (es)
AT (1) ATE456427T1 (es)
DE (2) DE202006003274U1 (es)
ES (1) ES2339283T3 (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013100265U1 (de) 2013-01-21 2014-04-22 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentschlüssel mit Drehmomentanzeige im Griff
DE202013100266U1 (de) 2013-01-21 2014-04-22 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentschlüssel mit Arretierfunktion
DE202013100268U1 (de) 2013-01-21 2014-04-22 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentschlüssel mit Anzeigeskala
DE202013100263U1 (de) 2013-01-21 2014-04-24 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Justierung eines Drehmomentschlüssels

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009006464U1 (de) 2009-05-06 2009-07-30 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentschlüssel
DE202011050280U1 (de) * 2011-05-30 2011-07-25 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug
DE202011050282U1 (de) * 2011-05-30 2011-07-11 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug
DE202011050281U1 (de) 2011-05-30 2011-07-11 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentwerkzeug
DE202011110176U1 (de) 2011-06-01 2012-12-19 Richard Abr. Herder Gmbh & Co. Kg Werkzeug
WO2012163374A1 (de) 2011-06-01 2012-12-06 Richard Abr. Herder Gmbh & Co. Kg Werkzeug
DE102013208289A1 (de) 2013-05-06 2014-11-06 Michael Müller Schraubwerkzeug
DE102015103539A1 (de) * 2015-03-11 2016-09-15 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentschlüssel
TWI644762B (zh) * 2017-09-18 2018-12-21 和嘉興精密有限公司 旋動鎖固之扭力扳手
TWI668083B (zh) * 2018-07-20 2019-08-11 和嘉興精密有限公司 具提示之鎖固型扭力扳手

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667800A (en) * 1951-02-12 1954-02-02 George C Jenkins Adjustable break-through torque wrench
DE2309618C3 (de) * 1973-02-27 1975-09-04 Hermann Jochen 5630 Remscheid Zerver Drehmomentschlüssel
US5662012A (en) * 1995-11-07 1997-09-02 Consolidated Devices, Inc. Torque wrench structure
US6948410B1 (en) * 2004-03-04 2005-09-27 Precision Instruments, Inc. Torque wrench with sleeve for locking rotatable handle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013100265U1 (de) 2013-01-21 2014-04-22 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentschlüssel mit Drehmomentanzeige im Griff
DE202013100266U1 (de) 2013-01-21 2014-04-22 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentschlüssel mit Arretierfunktion
DE202013100268U1 (de) 2013-01-21 2014-04-22 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Drehmomentschlüssel mit Anzeigeskala
DE202013100263U1 (de) 2013-01-21 2014-04-24 Hazet-Werk Hermann Zerver Gmbh & Co. Kg Justierung eines Drehmomentschlüssels
EP2756924A2 (de) 2013-01-21 2014-07-23 Hazet-Werk Hermann Zerver GmbH & Co. KG Justierung eines Drehmomentschlüssels

Also Published As

Publication number Publication date
DE202006003274U1 (de) 2006-04-27
EP1825959A1 (de) 2007-08-29
ES2339283T3 (es) 2010-05-18
ATE456427T1 (de) 2010-02-15
DE502007002710D1 (de) 2010-03-18

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