EP1022097A2 - Drehmomentschlüssel mit Winkelsensor ohne äusseren Referenzpunkt - Google Patents
Drehmomentschlüssel mit Winkelsensor ohne äusseren Referenzpunkt Download PDFInfo
- Publication number
- EP1022097A2 EP1022097A2 EP00200210A EP00200210A EP1022097A2 EP 1022097 A2 EP1022097 A2 EP 1022097A2 EP 00200210 A EP00200210 A EP 00200210A EP 00200210 A EP00200210 A EP 00200210A EP 1022097 A2 EP1022097 A2 EP 1022097A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- wrench
- sensor
- accordance
- head
- torque
- 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- Withdrawn
Links
Images
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
- B25B23/0007—Connections or joints between tool parts
- B25B23/0035—Connection means between socket or screwdriver bit and tool
Definitions
- the present invention relates to a torque wrench of the type comprising an angle sensor.
- a potentiometer or an encoder mounted on the axis of the wrench head generally equipped with a ratchet.
- the angle is calculated with the potentiometer or the encoder by measuring rotation of the wrench head with respect to a an external reference point obtained by connecting the measurer shaft to an external reference by means of a flexible rod terminating with a magnet or an anchoring clamp.
- the wrench head can be equipped only with a ratchet or a fixed panel, given the presence of the angle measurement member, coaxial with the handling panel, and it is not possible to use for example fork or polygonal wrenches or, even less, special attachments.
- the general purpose of the present invention is to remedy the above mentioned shortcomings by making available a torque wrench permitting rotation angle measurement with no need for fixed references.
- an electronic torque wrench comprising a head for connection to a member to be tightened, a first sensor for detecting the torque generated on the head upon moving the wrench, a second sensor for detecting angular rotation of the head, means of calculation to find from the sensor detection information considered significant and characterized in that the angular rotation sensor comprises a gyroscopic sensor.
- FIG 1 shows a torque wrench indicated as a whole by reference number 10.
- the wrench comprises a body 11 at one end of which there is a head 12 for connection to a member to be tightened (not shown) and, at the opposite end, a handling grip 13.
- the head can be of any known type (fork, square, polygonal, et cetera) with or without ratchet and any size.
- the head is merely a mechanical member of the wrench. It can thus be changeable with a coupling and selected from a plurality 12a of different heads depending on requirements.
- a torque sensor 14 In the connection between the grip and the head there is a torque sensor 14.
- This sensor is advantageously accomplished by means of a bending cell made up of a pair of extensometric bridges 15 spaced along the wrench axis and connected in such a manner as to produce a signal differential between the innermost bridge and the outermost bridge and thus obtain a signal proportionate to the torque applied on the grip independent of its application point.
- the cell 14 bears at its external end the coupling seat of the interchangeable head and is rigidly fastened in a tubular bar 16 which joins with the body 11 to provide protection for the zone of the extensometers.
- the body 11 contains a gyroscopic sensor 17 for measurement of the wrench rotation angle.
- a keyboard 20 permits setting wrench operation, inputting of parameters et cetera in combination with the information shown on the display.
- the display can also show graphics in the various types of use and menus with icons to make use simple and intuitive by operators even not experts.
- LEDs 21 for visual signaling to the operator based on the result of a previously selected work method. For example lighting of a LED could warn of reaching a preset tightening value.
- the wrench is equipped with power supply batteries which are advantageously contained in the grip 13 and can be recharged through an outlet 22 for connection to an external battery charger (not shown).
- the grip could have a fast closing plug for battery change.
- Another electrical outlet 23 permits exchange of data between the wrench and external computerized units (not shown) such as for example a personal computer.
- FIG 2 shows a block diagram of the wrench.
- the gyroscopic sensor 17 is accomplished in the form of an optical gyroscope which was found advantageous due to the absence of moving parts, low power consumption, high precision and robustness.
- the optical gyroscope is based on the known 'Segnac' effect.
- the optical gyroscope comprises an optical fiber coil 24, a piezoelectric ceramic phase modulator 25, a coupler 26 which optically couples the ends of the optical fiber together to obtain a single fiber which traverses a polarizer 27 connected at its other end to another optical coupler 28 to which are connected a light source 29 and a photoelectric sensor 30.
- the signal 32 is sent to a microprocessor circuit 33 which also receives the signal from the torque sensor 14.
- the circuit 33 processes the signal received and shows the result of the processing on the display 19 and if necessary sends it onto the connector 22.
- the circuit 33 also receives the command signals produced by the keyboard 20.
- the microprocessor circuit 33 has a structure known in itself and therefore will not be further described nor shown.
- the circuit 33 samples the signal 32 at predetermined time intervals T.
- the value sampled represents the instantaneous wrench rotation velocity. If the value is zero the wrench has not moved since the last sampling. Otherwise the circuit calculates the integral of the velocity and adds it to the instantaneous velocity.
- K is a function of sampling frequency, corresponding voltage-degrees per second of the signal 32, and corresponding tension-points of the analog to digital converter used in the acquisition.
- Measurement drift values within the test duration range are extremely small and do not influence angle measurement precision.
- the angle measurement process as described above is performed in parallel with the torque value acquisition performed by known methods.
- the circuit 33 employs the angle and torque values in a virtually known manner to supply desired functions and information.
- the gyroscope supplies an absolute rotation measurement in any operational plane.
- use of the gyroscope together with use of extensometers which measure bending permits providing interchangeable heads with ratchets, forks, polygonal, special et cetera without limit.
- the wrench could be made with the electronic part separate and connected to the actual wrench through a cable for example to have a lighter wrench or to share a single electronic unit among several wrenches with different measurement capability.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI990111 | 1999-01-22 | ||
IT1999MI000111A IT1308592B1 (it) | 1999-01-22 | 1999-01-22 | Chave dinamometrica con sensore di angolo senza riferimento esterno |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1022097A2 true EP1022097A2 (de) | 2000-07-26 |
EP1022097A3 EP1022097A3 (de) | 2003-01-22 |
Family
ID=11381577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00200210A Withdrawn EP1022097A3 (de) | 1999-01-22 | 2000-01-20 | Drehmomentschlüssel mit Winkelsensor ohne äusseren Referenzpunkt |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1022097A3 (de) |
IT (1) | IT1308592B1 (de) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003041914A2 (en) * | 2001-11-14 | 2003-05-22 | Snap-On Technologies, Inc. | Electronic torque wrench |
FR2843326A1 (fr) * | 2002-08-12 | 2004-02-13 | One Too | Cle dynamometrique |
EP1462220A1 (de) * | 2003-03-26 | 2004-09-29 | Snecma Moteurs | Gesteuerter Schraubenschlüssel |
WO2007062229A1 (en) * | 2005-11-28 | 2007-05-31 | Snap-On Incorporated | Torque-angle instrument |
DE102007055028A1 (de) * | 2007-11-17 | 2009-05-20 | Richard Abr. Herder Kg | Winkelmeßeinrichtung |
EP1962064A3 (de) * | 2007-02-22 | 2009-09-23 | Eduard Wille GmbH & Co KG | Winkelmesseinrichtung |
WO2009136840A1 (en) | 2008-05-08 | 2009-11-12 | Atlas Copco Tools Ab | Method and device for tightening joints |
CN103185651A (zh) * | 2011-12-31 | 2013-07-03 | 信义汽车玻璃(深圳)有限公司 | 一种汽车玻璃镜座扭矩检测装置以及检测方法 |
DE102008022466B4 (de) * | 2007-05-07 | 2014-02-20 | Pax Ag | Vorrichtung zur Prüfung einer Gängigkeit eines Antriebselementes |
EP2712709A1 (de) * | 2012-10-01 | 2014-04-02 | One Too | Spannwerkzeug und sein Spannverfahren |
US8886492B2 (en) | 2011-09-23 | 2014-11-11 | Brown Line Metal Works, Llc | Digital angle meter |
TWI464040B (zh) * | 2012-08-27 | 2014-12-11 | Kabo Tool Co | Around the display of electronic torque hand tools |
US8918292B2 (en) | 2011-09-23 | 2014-12-23 | Brown Line Metalworks, Llc | Digital angle meter |
WO2018036665A1 (de) * | 2016-08-25 | 2018-03-01 | Man Diesel & Turbo Se | Drehmomentschlüsseladapter |
IT201900024730A1 (it) * | 2019-12-19 | 2021-06-19 | Atlas Copco Ind Technique Ab | Attrezzo di serraggio con controllo della coppia di serraggio. |
WO2022082031A1 (en) * | 2020-10-15 | 2022-04-21 | Enerpac Tool Group Corp. | Load measurement system for hydraulic torque wrench |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2538741A1 (fr) * | 1982-12-30 | 1984-07-06 | Facom | Cle dynamometrique a extensometres electriques |
US4976133A (en) * | 1988-12-02 | 1990-12-11 | Cdi Consolidated Devices Inc | Instrument for adjusting and calibrating torque wrenches |
DE4243317A1 (en) * | 1992-12-21 | 1993-06-09 | Edgar Von Dipl.-Ing. 6602 Dudweiler De Hinueber | Angle control method for automatic screwdriver - using inertial angular rate sensor built into rotating shaft of insertion tool, and e.g. Sagnac effect rotation pick=up |
US5476014A (en) * | 1992-12-21 | 1995-12-19 | Mercedes-Benz Ag | Process and a device for the rotation-angle-monitored tightening or loosening of screw connections |
US5589644A (en) * | 1994-12-01 | 1996-12-31 | Snap-On Technologies, Inc. | Torque-angle wrench |
DE29615123U1 (de) * | 1996-08-30 | 1998-01-08 | Wille Gmbh & Co | Elektronischer Meßschlüssel |
-
1999
- 1999-01-22 IT IT1999MI000111A patent/IT1308592B1/it active
-
2000
- 2000-01-20 EP EP00200210A patent/EP1022097A3/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2538741A1 (fr) * | 1982-12-30 | 1984-07-06 | Facom | Cle dynamometrique a extensometres electriques |
US4976133A (en) * | 1988-12-02 | 1990-12-11 | Cdi Consolidated Devices Inc | Instrument for adjusting and calibrating torque wrenches |
DE4243317A1 (en) * | 1992-12-21 | 1993-06-09 | Edgar Von Dipl.-Ing. 6602 Dudweiler De Hinueber | Angle control method for automatic screwdriver - using inertial angular rate sensor built into rotating shaft of insertion tool, and e.g. Sagnac effect rotation pick=up |
US5476014A (en) * | 1992-12-21 | 1995-12-19 | Mercedes-Benz Ag | Process and a device for the rotation-angle-monitored tightening or loosening of screw connections |
US5589644A (en) * | 1994-12-01 | 1996-12-31 | Snap-On Technologies, Inc. | Torque-angle wrench |
DE29615123U1 (de) * | 1996-08-30 | 1998-01-08 | Wille Gmbh & Co | Elektronischer Meßschlüssel |
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6968759B2 (en) | 2001-11-14 | 2005-11-29 | Snap-On Incorporated | Electronic torque wrench |
WO2003041914A3 (en) * | 2001-11-14 | 2003-11-13 | Snap On Tech Inc | Electronic torque wrench |
WO2003041914A2 (en) * | 2001-11-14 | 2003-05-22 | Snap-On Technologies, Inc. | Electronic torque wrench |
US6981436B2 (en) | 2001-11-14 | 2006-01-03 | Snap-On Incorporated | Electronic torque wrench |
FR2843326A1 (fr) * | 2002-08-12 | 2004-02-13 | One Too | Cle dynamometrique |
EP1389507A1 (de) * | 2002-08-12 | 2004-02-18 | 2-Pf S.A.R.L. | Drehmomentschlüssel |
US7036407B2 (en) | 2003-03-26 | 2006-05-02 | Snecma Moteurs | Wrench with controlled tightening |
FR2852879A1 (fr) * | 2003-03-26 | 2004-10-01 | Snecma Moteurs | Cle a serrage controle |
EP1462220A1 (de) * | 2003-03-26 | 2004-09-29 | Snecma Moteurs | Gesteuerter Schraubenschlüssel |
WO2007062229A1 (en) * | 2005-11-28 | 2007-05-31 | Snap-On Incorporated | Torque-angle instrument |
GB2447161A (en) * | 2005-11-28 | 2008-09-03 | Snap On Tools Corp | Torque-angle instrument |
US7565844B2 (en) | 2005-11-28 | 2009-07-28 | Snap-On Incorporated | Torque-angle instrument |
AU2006318399B2 (en) * | 2005-11-28 | 2010-08-19 | Snap-On Incorporated | Torque-angle instrument |
GB2447161B (en) * | 2005-11-28 | 2011-07-06 | Snap On Tools Corp | Torque-angle instrument |
EP1962064A3 (de) * | 2007-02-22 | 2009-09-23 | Eduard Wille GmbH & Co KG | Winkelmesseinrichtung |
US7841100B2 (en) * | 2007-02-22 | 2010-11-30 | Eduard Wille Gmbh & Co Kg | Angle measuring device |
CN101251364B (zh) * | 2007-02-22 | 2016-12-28 | 斯达威力艾都威乐有限两合公司 | 角度测量装置 |
DE102008022466B4 (de) * | 2007-05-07 | 2014-02-20 | Pax Ag | Vorrichtung zur Prüfung einer Gängigkeit eines Antriebselementes |
DE102007055028A1 (de) * | 2007-11-17 | 2009-05-20 | Richard Abr. Herder Kg | Winkelmeßeinrichtung |
WO2009136840A1 (en) | 2008-05-08 | 2009-11-12 | Atlas Copco Tools Ab | Method and device for tightening joints |
US8886492B2 (en) | 2011-09-23 | 2014-11-11 | Brown Line Metal Works, Llc | Digital angle meter |
US8918292B2 (en) | 2011-09-23 | 2014-12-23 | Brown Line Metalworks, Llc | Digital angle meter |
CN103185651B (zh) * | 2011-12-31 | 2015-04-22 | 信义汽车玻璃(深圳)有限公司 | 一种汽车玻璃镜座扭矩检测装置以及检测方法 |
CN103185651A (zh) * | 2011-12-31 | 2013-07-03 | 信义汽车玻璃(深圳)有限公司 | 一种汽车玻璃镜座扭矩检测装置以及检测方法 |
TWI464040B (zh) * | 2012-08-27 | 2014-12-11 | Kabo Tool Co | Around the display of electronic torque hand tools |
EP2712709A1 (de) * | 2012-10-01 | 2014-04-02 | One Too | Spannwerkzeug und sein Spannverfahren |
FR2996155A1 (fr) * | 2012-10-01 | 2014-04-04 | One Too | Outil de serrage et son procede |
WO2018036665A1 (de) * | 2016-08-25 | 2018-03-01 | Man Diesel & Turbo Se | Drehmomentschlüsseladapter |
IT201900024730A1 (it) * | 2019-12-19 | 2021-06-19 | Atlas Copco Ind Technique Ab | Attrezzo di serraggio con controllo della coppia di serraggio. |
WO2021124187A1 (en) * | 2019-12-19 | 2021-06-24 | Atlas Copco Industrial Technique Ab | Clamping tool with tightening torque control |
WO2022082031A1 (en) * | 2020-10-15 | 2022-04-21 | Enerpac Tool Group Corp. | Load measurement system for hydraulic torque wrench |
Also Published As
Publication number | Publication date |
---|---|
EP1022097A3 (de) | 2003-01-22 |
IT1308592B1 (it) | 2002-01-08 |
ITMI990111A1 (it) | 2000-07-22 |
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