EP1389507A1 - Cle dynamometrique - Google Patents
Cle dynamometrique Download PDFInfo
- Publication number
- EP1389507A1 EP1389507A1 EP03300076A EP03300076A EP1389507A1 EP 1389507 A1 EP1389507 A1 EP 1389507A1 EP 03300076 A EP03300076 A EP 03300076A EP 03300076 A EP03300076 A EP 03300076A EP 1389507 A1 EP1389507 A1 EP 1389507A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torque wrench
- wrench according
- torque
- extensometers
- key
- 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
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 and more particularly an improved torque wrench having a body elastically deformable and carrying two extensometers and means of processing of the signals from the two extensometers to determine the value of the tightening torque.
- the invention will find its application in any field where a tightening with torque control is necessary.
- document FR-A-2 538 741 discloses a key dynamometer comprising an elastic bar connected to a head with extensometers at distances different from the axis of rotation of the head and connected in a bridge circuit of Wheatstone. According to this anteriority, it is possible to determine a value of torque independently of the gripping area by the user.
- two identical and connected extensometers are used. by a Wheatstone bridge to obtain an electrical value proportional to the torque.
- the treatment of the electrical values generated by the extensometers are here made analogically via a electric circuit.
- a first drawback associated with such a torque wrench is that the Measurement data processing is purely electronic. It therefore requires a plurality of reliability, and precision, limited components and a damaging clutter.
- the present invention makes it possible to remedy the disadvantages of the keys known dynamometers so far and proposes, to do this, a key improved with several advantages.
- a first advantage of the invention is that it provides detection automatic type of workpiece in order to adapt the parameters of treatment and get a value of torque always faithful whatever the room of training used.
- the invention also has the advantage of digital signal processing means from the sensors, to increase the effectiveness of the key.
- This key comprises means of automatic detection of the type of workout piece to adapt the treatment parameters to characteristics of the workpiece.
- Figure 1 shows an embodiment of a key shaft incorporating the test body of the torque wrench.
- FIGS 2 to 3 illustrate three possible embodiments of parts of training of different lengths.
- Figure 4 shows an embodiment of the assembly of a part training and the handle.
- Figures 5 and 6 show a more specific example of body shape test.
- FIG. 7 is a block diagram illustrating the means of processing the measurement signals.
- the key according to the invention comprises firstly a handle 4 adapted to grip the user.
- the 4 comprises a sleeve 3 constituting its outer surface and is usually made of sufficiently adherent material such as rubber.
- the handle 4 encloses a body 1 carrying two extensometers 10, 11.
- the handle 4 cooperates with a workpiece 2a, 2c incorporating or able to receive at its front end 9a, 9c a head to the desired profile depending on the nature of the object to be tightened (for example example the outer profile of a nut).
- It can act as a ratchet or a bit.
- the training parts 2a, 2c can also be different lengths as shown in Figures 2 to 3.
- connection 5a, 5c on the workpiece 2a, 2c so as to fit in a blind hole 7 formed in correspondence on one end of the handle 4.
- This configuration is illustrated in Figures 1 to 3 and, in an assembled manner, in figure 4.
- a locking system is preferably constituted with a locking pin 6 formed on the periphery of the connection end 5a, 5c and a bearing ball 8 made in correspondence on the periphery of the blind hole 7.
- FIGS. 2 to 3 it can be seen that it is possible to form similar means at the front end 9a, 9c of the pieces 2a, 2c for the possible connection of a drive head if it is not monobloc with the workpiece 2a, 2c.
- this body 1 comprises two extensometers 10, 11 of current design.
- the extensometers 10, 11 are arranged on a flat part of the body 1 and are sensitive to the pure bending of the key. Their measurement makes it possible to determine the effort, therefore the applied torque, after treatment.
- the shape of the body 1 is adapted to provide elastic deformation values sufficient for the quality of the measurements operated by extensometers 10 and 11.
- slots 12, 13 are constituted at the level of each extensometer 10, 11.
- a narrowing 14 can also be formed along the body 1. Note that, at this narrowing 14, an interior volume at the handle 4 is released, which allows the incorporation of processing means which will be described below.
- processing means comprise digital means having a processor illustrated by the microcontroller 21 in FIG. digital analog converter 20.
- the signal electrical x (representative for each extensometer 10, 11 a value of measure m1, m2) is received at a design amplifier 19 current able to increase the output level.
- An amplified X value is obtained at the output of the amplifier 19. This value X is injected into a 20 analog digital conversion type converter for obtaining a discrete value Xd constituting a numerical value representative of electrical values from extensometers 10, 11.
- the value of the torque c obtained is independent of the gripping area of the key by the user.
- M1 and M2 the numerical values corresponding to the measurement values of extensometers 10, 11 and a, b and c constants.
- a triplet can be determined of these values that can be stored in the processing means at the level of a memory.
- a table has thus been constituted in memory comprising parameters processing that can be used by the microcontroller 21 for determine the value of the C pair.
- the torque wrench comprises means for automatic detection of the type of workpiece 2a, 2c so as to adapt the treatment parameters to the characteristics of the room 2a, 2c.
- the detection means comprise a magnetic sensor 18 located on the handle 4.
- each workpiece 2a, 2c comprises an identification member 17a, 17c formed in correspondence of the sensor 18.
- the detection is carried out as follows.
- the magnetic sensor 18 is able to detect different values of magnetic polarization of the identification members 17a, 17c. In particular, the sensor 18 can detect whether the identification member has a positive polarity, a negative polarity or zero charge.
- an identification member 17a in the form of a surface of positive polarity for one of the workpieces, a polarity surface negative for the second part, and a zero charge area for the third piece of training (for example for the training part formed only by the head of training).
- the user assembles in the first place the training part 2a, 2c 4. During the assembly, the identification member 17a, 17c is mapped to the sensor 18.
- the sensor 18 returns to an electronic card 15 carrying the means processing information related to the type of workpiece 2a, 2c used.
- a power supply advantageously incorporated in form 16, ensures the operation of the electrical means of the invention.
- the torque wrench set here presented may cooperate with an electronic remote display unit through means of advantageously wireless transmission (in particular by radio waves). Of this way, the user can read the torque measurement directly on a separate display without any constraints related to possible wired links.
- transmission are specifically coded and characteristic for a key given.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Air Bags (AREA)
Abstract
Description
- un corps déformable élastiquement, coopérant avec des pièces d'entraínement interchangeables et portant deux extensomètres positionnés à des endroits différents le long du corps,
- des moyens de traitement de signaux issus des extensomètres en vue de déterminer la valeur du couple de serrage
- les moyens de détection comprennent au moins un capteur magnétique sur le corps coopérant avec un organe d'identification de charge magnétique prédéterminée, porté par la pièce d'entraínement,
- les moyens de traitement incluent des moyens numériques avec un processeur et une mémoire de stockage de paramètres de traitement selon le type de pièces d'entraínement
- l'organe d'identification est la face de polarité positive ou négative d'un aimant permanent,
- l'organe d'identification est une surface de charge magnétique nulle.
- les pièces d'entraínement sont de longueur différente.
- elle comporte une unité électronique à affichage de mesure déportée du corps de la clé.
- elle comporte une unité électronique à affichage de mesure et des moyens de transmission sans fil entre ladite unité et le corps de la clé.
- les signaux transmis entre l'unité et le corps ont un codage spécifique, évitant toute interférence avec d'autres clés.
Claims (8)
- Clé dynamométrique comportantun corps (1) déformable élastiquement, coopérant avec des pièces d'entraínement (2a, 2c) interchangeables et portant deux extensomètres (10, 11) positionnés à des endroits différents le long du corps (1 ),des moyens de traitement de signaux issus des extensomètres (10, 11 ) en vue de déterminer la valeur du couple de serrage
- Clé dynamométrique selon la revendication 1 caractérisée par le fait que
les moyens de traitement incluent des moyens numériques avec un processeur et une mémoire de stockage de paramètres de traitement selon le type de pièces d'entraínement (2a, 2c). - Clé dynamométrique selon la revendication 1 ou la revendication 2 caractérisée par le fait que
l'organe d'identification (17a, 17c) est la face de polarité positive ou négative d'un aimant permanent. - Clé dynamométrique selon la revendication 1 ou la revendication 2 caractérisée par le fait que
l'organe d'identification (17a, 17c) est une surface de charge magnétique nulle. - Clé dynamométrique selon l'une quelconque des revendications 1 à 4 caractérisée par le fait que
les pièces d'entraínement (2a, 2c) sont de longueur différente. - Clé dynamométrique selon l'une quelconque des revendications 1 à 5, caractérisée par le fait qu'elle comporte une unité électronique à affichage de mesure déportée du corps (1) de la clé.
- Clé dynamométrique selon la revendication 6 caractérisée par le fait qu'elle comporte des moyens de transmission sans fil entre ladite unité et le corps (1) de la clé.
- Clé dynamométrique selon la revendication 7, caractérisée par le fait que les signaux transmis entre l'unité et le corps (1) ont un codage spécifique, évitant toute interférence avec d'autres clés.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0210192 | 2002-08-12 | ||
FR0210192A FR2843326B1 (fr) | 2002-08-12 | 2002-08-12 | Cle dynamometrique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1389507A1 true EP1389507A1 (fr) | 2004-02-18 |
EP1389507B1 EP1389507B1 (fr) | 2010-10-06 |
Family
ID=30471059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03300076A Expired - Lifetime EP1389507B1 (fr) | 2002-08-12 | 2003-07-31 | Clé dynamométrique |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1389507B1 (fr) |
AT (1) | ATE483555T1 (fr) |
DE (1) | DE60334426D1 (fr) |
FR (1) | FR2843326B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2976206A1 (fr) * | 2011-06-10 | 2012-12-14 | Eclatorq Technology Co Ltd | Appareil electronique a couple equipe d'un dispositif de compensation automatique avec couple de sortie |
EP2712709A1 (fr) * | 2012-10-01 | 2014-04-02 | One Too | Outil de serrage et son procédé |
FR3020300A1 (fr) * | 2014-04-25 | 2015-10-30 | Renault Georges Ets | Dispositif de vissage a moyens de reconnaissance d'accessoire de vissage en position coaxiale |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021127081A1 (de) | 2021-10-19 | 2023-04-20 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum Betrieb eines, insbesondere handgeführten, Schraubwerkzeugs |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2538741A1 (fr) * | 1982-12-30 | 1984-07-06 | Facom | Cle dynamometrique a extensometres electriques |
EP0119928A1 (fr) * | 1983-03-17 | 1984-09-26 | Facom | Appareil de serrage dynamométrique |
US5014794A (en) * | 1988-07-08 | 1991-05-14 | Atlas Copco Ab | Power driven tool and drive system therefor |
USH1821H (en) * | 1997-07-02 | 1999-12-07 | Caterpillar, Incorporated | Method and apparatus for operating a driver and an associated number of work tools |
EP1022097A2 (fr) * | 1999-01-22 | 2000-07-26 | BLM S.a.s. di L. Bareggi & C. | Clé dynamométrique avec capteur d'angle sans référence externe |
WO2000045997A1 (fr) * | 1999-02-05 | 2000-08-10 | Raimund Wilhelm | Noix intelligente |
EP1060844A2 (fr) * | 1999-06-16 | 2000-12-20 | BLM S.a.s. di L. Bareggi & C. | Outil de serrage avec insert interchangable |
-
2002
- 2002-08-12 FR FR0210192A patent/FR2843326B1/fr not_active Expired - Fee Related
-
2003
- 2003-07-31 DE DE60334426T patent/DE60334426D1/de not_active Expired - Lifetime
- 2003-07-31 EP EP03300076A patent/EP1389507B1/fr not_active Expired - Lifetime
- 2003-07-31 AT AT03300076T patent/ATE483555T1/de not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2538741A1 (fr) * | 1982-12-30 | 1984-07-06 | Facom | Cle dynamometrique a extensometres electriques |
EP0119928A1 (fr) * | 1983-03-17 | 1984-09-26 | Facom | Appareil de serrage dynamométrique |
US5014794A (en) * | 1988-07-08 | 1991-05-14 | Atlas Copco Ab | Power driven tool and drive system therefor |
USH1821H (en) * | 1997-07-02 | 1999-12-07 | Caterpillar, Incorporated | Method and apparatus for operating a driver and an associated number of work tools |
EP1022097A2 (fr) * | 1999-01-22 | 2000-07-26 | BLM S.a.s. di L. Bareggi & C. | Clé dynamométrique avec capteur d'angle sans référence externe |
WO2000045997A1 (fr) * | 1999-02-05 | 2000-08-10 | Raimund Wilhelm | Noix intelligente |
EP1060844A2 (fr) * | 1999-06-16 | 2000-12-20 | BLM S.a.s. di L. Bareggi & C. | Outil de serrage avec insert interchangable |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2976206A1 (fr) * | 2011-06-10 | 2012-12-14 | Eclatorq Technology Co Ltd | Appareil electronique a couple equipe d'un dispositif de compensation automatique avec couple de sortie |
EP2712709A1 (fr) * | 2012-10-01 | 2014-04-02 | One Too | Outil de serrage et son procédé |
FR2996155A1 (fr) * | 2012-10-01 | 2014-04-04 | One Too | Outil de serrage et son procede |
FR3020300A1 (fr) * | 2014-04-25 | 2015-10-30 | Renault Georges Ets | Dispositif de vissage a moyens de reconnaissance d'accessoire de vissage en position coaxiale |
EP2944425A1 (fr) * | 2014-04-25 | 2015-11-18 | Etablissements Georges Renault | Dispositif de vissage à moyens de reconnaissance d'accessoire de vissage en position coaxiale |
Also Published As
Publication number | Publication date |
---|---|
FR2843326A1 (fr) | 2004-02-13 |
ATE483555T1 (de) | 2010-10-15 |
FR2843326B1 (fr) | 2005-04-15 |
EP1389507B1 (fr) | 2010-10-06 |
DE60334426D1 (de) | 2010-11-18 |
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JP2000176852A (ja) | ナットランナー |
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