EP1099516A2 - Knauf zum Anziehen von Schrauben mit voreinstellbarem aktiven Drehmoment - Google Patents

Knauf zum Anziehen von Schrauben mit voreinstellbarem aktiven Drehmoment Download PDF

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Publication number
EP1099516A2
EP1099516A2 EP00123463A EP00123463A EP1099516A2 EP 1099516 A2 EP1099516 A2 EP 1099516A2 EP 00123463 A EP00123463 A EP 00123463A EP 00123463 A EP00123463 A EP 00123463A EP 1099516 A2 EP1099516 A2 EP 1099516A2
Authority
EP
European Patent Office
Prior art keywords
handgrip
knob according
constituted
nut
adaptor base
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.)
Withdrawn
Application number
EP00123463A
Other languages
English (en)
French (fr)
Other versions
EP1099516A3 (de
Inventor
Gino Ferrari
Franco Maioli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1099516A2 publication Critical patent/EP1099516A2/de
Publication of EP1099516A3 publication Critical patent/EP1099516A3/de
Withdrawn legal-status Critical Current

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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
    • B25B23/141—Mechanical overload release couplings

Definitions

  • the present invention relates to a screw-type tightening knob with preadjustable active torque.
  • Torque wrenches are known for these specific requirements which, preset to specific values of torque and used to tighten nuts and bolts, avoid reaching the critical values which, as mentioned, cause damage.
  • the aim of the present invention is to solve the above problems of the prior art, by providing a screw tightening knob with preadjustable active torque which allows to mutually join two bodies with a calibrated force and without exceeding said force and risking damage to the coupling elements, all without the need to resort to the use of torque wrenches or the like.
  • a screw tightening knob with preadjustable active torque characterized in that it is composed of an adaptor base which can be rigidly coupled to a body to be tightened and onto which a handgrip can be screwed with interposed pre-loaded friction coupling means.
  • FIGS 1, 2, 3, and 4 are partially sectional views of as many possible embodiments of the knob according to the invention.
  • 1 designates a screw tightening knob with preadjustable active torque.
  • the knob 1 is composed of an adaptor base 2, which can be rigidly coupled to an intended body to be tightened and on which it is possible to screw a corresponding handgrip 4 with interposed pre-loaded friction coupling means 3.
  • a threaded axial pivot 5 protrudes from the adaptor base 2 and is adapted to be inserted snugly, while allowing free forward and backward sliding, in a corresponding axial cavity 6 which passes through the handgrip 4 until it protrudes beyond the end of the cavity 6 in order to allow the screwing of a corresponding nut 7 of the self-locking type for fastening the handgrip 4 to the adaptor base 2.
  • an elastic means 8 for reactive contrast by compression is interposed between said nut 7 and said handgrip 4 and is substantially constituted by at least one helical spring 9 whose turns are wound coaxially on the portion of the pivot 5 protruding from the axial cavity 6 and whose ends rest respectively against said nut 7 and the bottom of a wider portion 6a of the axial cavity 6 which is formed at the end directed towards the nut 7 and is adapted to fully contain said nut in the screwed-on configuration.
  • the friction coupling means 3 can be provided in four substantially equivalent embodiments.
  • they are constituted by a plurality of balls 10 which are accommodated in corresponding hollow seats 11 so as to protrude slightly from them; said hollow seats 11 are formed in the face 4b of the end of the handgrip 4 that is directed towards the adaptor base 2, and in the opposite face 2a of said base there are provided corresponding hemispherical cavities 12, in practice domes, which are adapted to contain the protruding portions of said balls 10.
  • the friction coupling means 3 are constituted by corresponding complementarily shaped sets of teeth 13 and 14 which are again formed on the opposite faces 4b of the handgrip 4 and 2a of the adaptor base 2.
  • the friction coupling means 3 are constituted by a male-female coupling which has a frustum-shaped profile; more precisely, the male body 15 is axially associated with the adaptor base 2 and the corresponding female seat 16 is formed in the facing end of the handgrip 4.
  • the friction coupling means 3 are constituted by two plates 17 and 18 made of materials having known grip coefficients, applied to the respective facing faces 4b of the handgrip 4 and 2a of the adaptor base 2.
  • the adaptor base 2 is fixed in a conventional manner to any body to be tightened.
  • the handgrip 4 is fitted over the base 2, making the threaded pivot 5 slide inside the axial cavity 6 until its end protrudes into the wider portion 6a.
  • the spring 9 which is helical or of the Belleville washer type or the like and has a preset modulus of elasticity, is then fitted onto said end and the handgrip is fastened with the nut 7, which is preferably of the so-called self-locking type.
  • the friction coupling means 3 mutually disconnect the handgrip 4 and the adaptor base 2.
  • the balls 10 are kept coupled to the corresponding seats 12 until the applied force exceeds said predefined value, beyond which the handgrip 4 moves backward on the pivot 5, overcoming the contrast of the spring 9 and rotating without being connected to the base 2 in steps which are determined by the rotary succession of the stepwise movements of the balls 10 in the mutually opposite seats 12.
  • knob 1 when the applied torque exceeds the preset loading value of the spring 9, in the second embodiment the teeth of the set of teeth 13 perform a ratcheting motion over the teeth of the complementarily set of teeth 14, mutually disconnecting the handgrip 4 and the base 2, and mutually reengage when the value of said applied torque decreases.
  • the male body 15 and the corresponding female seat 16, clad with, or directly made of, materials having known adhesion coefficients, remain mutually engaged until the maximum torque value is reached; once this value has been exceeded, grip becomes friction and the surfaces in mutual contact slide over each other, mutually disconnecting the handgrip 4 and the adaptor base 2.
  • the plates 17 and 18 transmit the torque applied until the limit value of mutual grip is reached; after this, grip becomes friction, causing their mutual slippage and the disconnection of the handgrip 4 from the adaptor base 2.
EP00123463A 1999-11-10 2000-11-06 Knauf zum Anziehen von Schrauben mit voreinstellbarem aktiven Drehmoment Withdrawn EP1099516A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMO990056U 1999-11-10
ITMO990056 IT248532Y1 (it) 1999-11-10 1999-11-10 Pomolo di serraggio a vite con momento attivo pretarabile

Publications (2)

Publication Number Publication Date
EP1099516A2 true EP1099516A2 (de) 2001-05-16
EP1099516A3 EP1099516A3 (de) 2002-10-23

Family

ID=11386921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00123463A Withdrawn EP1099516A3 (de) 1999-11-10 2000-11-06 Knauf zum Anziehen von Schrauben mit voreinstellbarem aktiven Drehmoment

Country Status (2)

Country Link
EP (1) EP1099516A3 (de)
IT (1) IT248532Y1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2910142A3 (fr) 2006-12-19 2008-06-20 Renault Sas Agencement de fixation d'un pommeau a l'extremite d'un levier de vitesses de vehicule automobile
CN107135008A (zh) * 2017-06-26 2017-09-05 重庆盾达科技有限公司 带自锁式调频旋钮的数字对讲机
EP3359065A4 (de) * 2015-10-07 2019-10-09 ECA Medical Instruments Getriebelose drehmomentbegrenzte in-line-vorrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR652350A (fr) * 1928-04-07 1929-03-07 Clef et dispositif de serrage
US3876369A (en) * 1973-08-06 1975-04-08 Alvin J Behrens Torque wrench
US4041811A (en) * 1976-05-10 1977-08-16 Durant Walter F Torque limiting driver
DE3149561A1 (de) * 1981-12-15 1983-06-23 Hans 8801 Schillingsfürst Heinlein "drehmomentschluessel"
DE3704764A1 (de) * 1986-03-13 1987-09-17 Polygraph Leipzig Einrichtung zum einstellen einer drehmomentbegrenzung an einem schraubendreher
WO2000069598A1 (en) * 1999-05-18 2000-11-23 Tommy Olsson Torque-limiting screwdriver

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR652350A (fr) * 1928-04-07 1929-03-07 Clef et dispositif de serrage
US3876369A (en) * 1973-08-06 1975-04-08 Alvin J Behrens Torque wrench
US4041811A (en) * 1976-05-10 1977-08-16 Durant Walter F Torque limiting driver
DE3149561A1 (de) * 1981-12-15 1983-06-23 Hans 8801 Schillingsfürst Heinlein "drehmomentschluessel"
DE3704764A1 (de) * 1986-03-13 1987-09-17 Polygraph Leipzig Einrichtung zum einstellen einer drehmomentbegrenzung an einem schraubendreher
WO2000069598A1 (en) * 1999-05-18 2000-11-23 Tommy Olsson Torque-limiting screwdriver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2910142A3 (fr) 2006-12-19 2008-06-20 Renault Sas Agencement de fixation d'un pommeau a l'extremite d'un levier de vitesses de vehicule automobile
EP3359065A4 (de) * 2015-10-07 2019-10-09 ECA Medical Instruments Getriebelose drehmomentbegrenzte in-line-vorrichtung
CN107135008A (zh) * 2017-06-26 2017-09-05 重庆盾达科技有限公司 带自锁式调频旋钮的数字对讲机
CN107135008B (zh) * 2017-06-26 2023-09-08 广东华之航科技有限公司 带自锁式调频旋钮的数字对讲机

Also Published As

Publication number Publication date
ITMO990056U1 (it) 2001-05-10
ITMO990056V0 (it) 1999-11-10
EP1099516A3 (de) 2002-10-23
IT248532Y1 (it) 2003-02-04

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