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WO2014012622A1 - Clé dynamométrique numérique électromécanique - Google Patents

Clé dynamométrique numérique électromécanique Download PDF

Info

Publication number
WO2014012622A1
WO2014012622A1 PCT/EP2013/001940 EP2013001940W WO2014012622A1 WO 2014012622 A1 WO2014012622 A1 WO 2014012622A1 EP 2013001940 W EP2013001940 W EP 2013001940W WO 2014012622 A1 WO2014012622 A1 WO 2014012622A1
Authority
WO
WIPO (PCT)
Prior art keywords
trolley
torque
pendulum element
torque wrench
prefixed
Prior art date
Application number
PCT/EP2013/001940
Other languages
English (en)
Inventor
Lorenzo Gambarini
Original Assignee
Tecnogi S.R.L.
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 Tecnogi S.R.L. filed Critical Tecnogi S.R.L.
Publication of WO2014012622A1 publication Critical patent/WO2014012622A1/fr

Links

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
    • B25B23/1425—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 electrical means
    • 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 present invention relates to an electromechanical digital torque wrench.
  • the present invention relates to a torque wrench equipped with a mechanical snap-release mechanism piloted by an electromagnet, and suitable for being advantageously used for the controlled tightening of blocking devices such as screws, nuts, bolts and the like, with a prefixed tightening torque, digitally set and controlled.
  • torque wrenches of the known type comprising a substantially tubular body, equipped with a handle, to which a insertion mechanism is applied in correspondence with an end of the same body, whose cavity is suitable for being coupled with the blocking device to be tightened.
  • An actuator group that is activated when the prefixed tightening torque is reached, is housed inside the tubular body, connected to mechanical lever means.
  • the above-mentioned mechanism is suitable for allowing a further limited rotation action of the tubular body in the tightening direction without this supplementary action having any effect on the blocking device, thus emitting a clear acoustic and sensitive signal - a mechanical snap due to the change in state of the internal lever mechanisms facilitated by spring means - which can be easily heard and perceived by the user.
  • Snap wrenches are therefore extremely easy to use and have a high productivity, they are very robust and reliable but have a limited accuracy, in particular due to the sum of the intrinsic tolerances of the lever mechanisms and spring means.
  • Digital wrenches are therefore extremely accurate, they also have the possibility of programming and memorizing various tightening data, and there is a high possibility of extending their functionalities.
  • An objective of the present invention is therefore to solve the problems of the known art indicated above.
  • an objective of the present invention is to provide a torque wrench capable of being extremely accurate and effective, easy and rapid to use, and highly practical.
  • a further objective of the present invention is to provide a torque wrench having a high extension degree of the functionalities, and with the possibility of memorizing and transferring the tightening values effected.
  • FIG. 1 represents a view of a first embodiment of the torque wrench, object of the invention, in a partially sectional view and with parts that have been removed for the sake of clarity;
  • figure 2 is a front view on an enlarged scale of a detail of the wrench of figure 1;
  • figure 3 is a partially sectional front view on an enlarged scale of the detail of the wrench of figure 2;
  • FIG. 4A and 4B are respective front views of the detail of figure 2 in two different operative positions ;
  • FIG. 5 represents a partially sectional front view with parts that have been removed for the sake of clarity, of a detail of a variant of the torque wrench, object of the invention
  • FIG. 6 is a view on an enlarged scale of the detail of the wrench of figure 5.
  • a torque wrench suitable for being used for the controlled tightening of blocking devices (known and not illustrated) with a prefixed tightening torque is indicated as a whole with C.
  • the wrench C is of the type comprising a tubular body T, which is equipped with a handle (known and not illustrated) and, in correspondence with an end of the body T itself, carries a insertion mechanism (also known and not illustrated) , whose cavity is suitable for being coupled with the blocking device to be tightened.
  • An actuator group G that can be activated when the prefixed and preset tightening torque is reached, is housed inside the tubular body T, connected to mechanical lever means L suitable for exerting the tightening torque.
  • the group G comprises a trolley 3 defined by an element substantially having a flat trapezoidal section with rounded edges, whose two opposite side ends K' and K" (with K' connected to the lever means L) support respective rolls 2' and 2" rotatable in neutral around respective fulcra f and f" .
  • the trolley 3 is suitable for cooperating with a substantially parallelepiped fixed block B, which has a flat edge 1 tilted with respect to the vertical by a certain angle a on which the roll 2" of the same trolley 3 is suitable for rolling m contact.
  • the block B also carries a pendulum element 4, which has its fulcrum on the block B itself around a pin PB situated in correspondence with a corner of the same block B opposite the edge 1, and is connected to a movable pin or stem 6 of an electromagnet 5, also forming part of the group G positioned inside the body C.
  • Elastic return spring means 7 are also present.
  • the group G is normally in a condition of equilibrium, stable also when loaded, defined by the trolley 3 resting by means of the roll 2" on the tilted flat edge 1 of the block B, and by the pendulum element 4 whose end or tooth 4a blocks the end K" of the trolley 3, keeping the same trolley 3 in a substantially fixed horizontal position and with both rolls 2' and 2" in contact with the internal edge of the tubular body T.
  • the tilted edge 1 of the block B is suitable for breaking up the thrust force of the roll 2" against the block B into two components, one directed horizontally and parallelly to the longitudinal axis of the body T of the wrench C, whereas the other, having a minimum value, is directed vertically and transversally to the axis of the wrench C and is opposed to the pendulum element 4 which is withholding the trolley 3.
  • the electromagnet 5 When in use, once the preselected tightening torque has been reached, for example, preferably previously preset on a digital measurement and control display present on the wrench C itself, in a known way and therefore not illustrated, the electromagnet 5 is activated to attract the pendulum element 4 and rotate the same element 4 around the pin PB so as to release - the tooth 4a from contact with the above end K" of the trolley 3, whose roll 2" can therefore slide rapidly along the tilted edge, consequently causing the trolley 3 itself to be released, moving upwards (operative change-of state position of figure 4B) , thus causing the movement of the levers L which definitively blocks the tightening action of the blocking devices.
  • the trolley 3 is suitable for cooperating with a substantially parallelepiped fixed block Ba having a vertical flat edge la on which the roll 2" of the same trolley 3 is suitable for rolling in contact .
  • the block Ba also carries a pendulum element 8, which has its fulcrum on the same block Ba around a pin PBa situated in correspondence with a corner of the same block Ba opposite the edge la, and is connected, analogously to the first embodiment described above, to a movable pin or stem 6 of an electromagnet 5, also forming part of the group G positioned inside the body C.
  • Elastic return spring means are also present (not illustrated) .
  • the pendulum element 8 comprises a lower end 9 shaped as a tooth or step 10 suitable for cooperating with a lower corner K" ' of the trolley 3.
  • the electromagnet 5 is activated to push the pendulum element 8 and rotate the same element 8 around the pin PBa so as to cause the step 10 to push the trolley 3 upwards, whose roll 2" can therefore slide along the vertical edge la, consequently causing the trolley 3 itself to be released, moving upwards, thus causing the movement of the levers L which definitively blocks the tightening action of the blocking devices.

Landscapes

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

Abstract

L'invention concerne une clé dynamométrique numérique (C) se composant d'un corps sensiblement tubulaire (T) et d'un groupe actionneur (G). L'une des extrémités du corps sensiblement tubulaire (T) comporte des moyens d'insertion servant au couplage avec les dispositifs de blocage à serrer. Des dispositifs de levier mécanique (L) convenant à l'exercice d'un couple de serrage préétabli sur les dispositifs considérés sont montés à l'intérieur du corps sensiblement tubulaire (T). Le groupe actionneur (G) peut être rendu actif quand ledit couple de serrage préétabli est atteint. Ce groupe actionneur (G) comprend, d'une part un chariot (3) relié aux dispositifs de levier mécanique (L) considérés, d'autre part un pendule (4; 8) conçu pour coopérer avec le chariot considéré (3) entre une première position et une seconde position de mise en œuvre, et enfin un électroaimant (5). Dans la première position, le chariot (3) est bloqué alors que dans la seconde position de mise en œuvre, le même chariot (3) est libéré de façon à réaliser une course d'impulsion. L'électroaimant (5), qui est connecté au pendule (4; 8), est conçu pour être actionné quand le couple préétabli est atteint, de façon à commander le déplacement du pendule (4; 8) pour déclencher la course d'impulsion.
PCT/EP2013/001940 2012-07-20 2013-07-03 Clé dynamométrique numérique électromécanique WO2014012622A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001267A ITMI20121267A1 (it) 2012-07-20 2012-07-20 Chiave dinamometrica digitale a stadio elettromeccanico
ITMI2012A001267 2012-07-20

Publications (1)

Publication Number Publication Date
WO2014012622A1 true WO2014012622A1 (fr) 2014-01-23

Family

ID=47016759

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/001940 WO2014012622A1 (fr) 2012-07-20 2013-07-03 Clé dynamométrique numérique électromécanique

Country Status (2)

Country Link
IT (1) ITMI20121267A1 (fr)
WO (1) WO2014012622A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2810741A1 (fr) * 2013-06-04 2014-12-10 One Too Dispositif de cassure pour un outil de serrage et outil de serrage muni d'un tel dispositif
CN112792775A (zh) * 2021-01-27 2021-05-14 杭州倍力耐工具有限公司 一种扭矩扳手

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1602096A (en) * 1978-05-26 1981-11-04 Turner Aitken Mfg Co Ltd Torque wrenches
US6119562A (en) * 1999-07-08 2000-09-19 Jenkins; Bradley G. Electromechanical releasing torque wrench
DE19912837A1 (de) * 1999-03-22 2000-10-26 Raimund Wilhelm Drehmomentschlüssel
US20020152849A1 (en) * 2001-01-31 2002-10-24 Jenkins Bradley G. Electromechanical releasing torque wrench
DE102006013147A1 (de) * 2006-03-20 2007-09-27 Eduard Wille Gmbh & Co. Kg Drehmomentwerkzeug mit Untersetzungsmechanismus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1602096A (en) * 1978-05-26 1981-11-04 Turner Aitken Mfg Co Ltd Torque wrenches
DE19912837A1 (de) * 1999-03-22 2000-10-26 Raimund Wilhelm Drehmomentschlüssel
US6119562A (en) * 1999-07-08 2000-09-19 Jenkins; Bradley G. Electromechanical releasing torque wrench
US20020152849A1 (en) * 2001-01-31 2002-10-24 Jenkins Bradley G. Electromechanical releasing torque wrench
DE102006013147A1 (de) * 2006-03-20 2007-09-27 Eduard Wille Gmbh & Co. Kg Drehmomentwerkzeug mit Untersetzungsmechanismus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2810741A1 (fr) * 2013-06-04 2014-12-10 One Too Dispositif de cassure pour un outil de serrage et outil de serrage muni d'un tel dispositif
CN112792775A (zh) * 2021-01-27 2021-05-14 杭州倍力耐工具有限公司 一种扭矩扳手

Also Published As

Publication number Publication date
ITMI20121267A1 (it) 2014-01-21

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