EP0164574B1 - Dispositif de vissage - Google Patents
Dispositif de vissage Download PDFInfo
- Publication number
- EP0164574B1 EP0164574B1 EP85105627A EP85105627A EP0164574B1 EP 0164574 B1 EP0164574 B1 EP 0164574B1 EP 85105627 A EP85105627 A EP 85105627A EP 85105627 A EP85105627 A EP 85105627A EP 0164574 B1 EP0164574 B1 EP 0164574B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- output shaft
- driving device
- screw
- housing
- transmitter
- 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.)
- Expired - Lifetime
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
- B25B23/145—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
- B25B23/1456—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers having electrical components
-
- 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
- B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
Definitions
- the invention relates to a screwdriver according to the preamble of claim 1.
- Screwdrivers are known (DE-AS 24 23 300, DE-OS 31 27 753) which have angular gears as the output or downstream spur gear.
- the sensors are used to measure the torque and / or the angle of rotation during the screwing process. As soon as the required angle of rotation or the necessary torque is reached, the measuring or. Control electronics generates a signal, usually a shutdown signal, so that the screwing process is ended.
- the transducer and the transmitter are provided in the area of the drive shaft.
- a torque applied to a screw can only be measured indirectly.
- the angular gear or the spur gear is located between the screwing tool engaged with the screw and the drive shaft.
- These transmission gears and, above all, the frictional conditions that occur and the associated gearbox efficiency affect the measuring accuracy.
- the screws are tightened to the yield point.
- the screwdriver must be reliable when the yield point is reached switch off so that the screw is not stretched excessively. This requirement cannot be met with the known screwdrivers in which the sensors are arranged in the drive area or on the drive shaft.
- the invention is based on the object of designing the generic screwdriver in such a way that the transducers for the torque and / or the angle of rotation can be arranged without enlarging the external dimensions of the screwdriver housing in such a way that the influence of the transmission and the frictional conditions during the measurement are switched off.
- the transducer and the transformer of the screwdriver according to the invention are arranged in the output area within the screwdriver housing.
- the transducer is therefore in the area of the driven part, so that the influence of the gear and the frictional conditions that occur during the measurement during the screwing process have no influence on the measuring accuracy.
- the parts to be screwed can be tightened reliably up to the yield point without the risk that they will be overstretched.
- the measured values are determined directly bypassing the transmission gear and transmitted to the control electronics.
- the transmission body which the measured values determined by the transducer on the measuring or. Control electronics transmits, is rotatably connected to the output shaft and rotates with it. At its slip ring lies the sensor with which the measurement signals are sent to the outside of the measuring or. Control electronics are performed.
- the transmitter is in an easily accessible location inside the gearbox.
- the housing of a spur gear 2 is arranged on the motor part 1 in a known manner. It has a drive pinion and an output gear 3 which sits on an output shaft 3a. It is supported in the transmission housing 4 by two bearings 5 and 6 arranged at a distance from one another.
- the driven shaft 3a is provided with a torsion part 7, which is formed by a section of the driven shaft that has a reduced diameter. Strain gauges 8 are bonded to the torsion part 7 in a known manner as signal transmitters for the torque applied to a screw as a measurement sensor.
- the signal generated by the strain gauges 8 when a torque is applied to a screw is fed to a transmitter 10 via connecting lines 9.
- the connecting lines 9 run through a bore 11 in the output shaft 3a to the transformer 10.
- the bore 11 can be provided centrally or eccentrically in the output shaft 3a.
- the transmitter 10 is arranged at the upper end of the output shaft 3a and has a peg-shaped transmission body 12 which sits in the bore 11 in a rotationally fixed manner.
- the connecting lines 9 are connected to solder lugs 13 of the transmission body 12, which is provided at its end projecting over the output shaft 3a with a number of slip rings 14 corresponding to the number of connecting lines 9.
- sensors 15 of a brush block 16 from which the measurement signals in a multi-core cable 17 to the outside (not shown) Measuring or control electronics are performed.
- the torsion part 7 is twisted by the reaction force of the screw.
- the size of the torsion is a measure of the applied torque and is converted by the strain gauges 8 into corresponding signals which are transmitted by the measuring or. Control electronics are evaluated.
- the revolutions of the output spindle are also monitored, for example, by means of a rotation angle sensor 18 arranged on the output shaft 3a.
- the rotary angle sensor 18, which can be a field plate sensor, for example, is also glued onto the output shaft 3a.
- the angle of rotation sensor 18 is located in the area outside the torsion part 7.
- the output shaft 3a is surrounded by a disk-shaped magnetic core 19 fastened to the inside of the transmission housing 4, the active surface 20 of which faces the angle of rotation sensor 18 (FIG. 4) in a spiral is trained.
- the output voltage of the rotary angle transmitter 18 changes in accordance with this distance, which enables an exact determination of the instantaneously traveled angle of rotation.
- the electrical lines 35 which discharge the angle of rotation signal from the angle of rotation sensor 18 are likewise guided through the bore 11 of the output shaft 3a.
- the two bearings 5, 6 are provided for guiding and mounting the output shaft 3a.
- the bearing 5 is fixed in the axial direction. On its side facing the bearing 6, the bearing 5 lies on an inwardly projecting side Shoulder 21 of the gear housing 4.
- the bearing 5 is axially secured by a nut 22 which is screwed into a threaded bore 23 of the gear housing 4 and with which the bearing 5 is pressed against the shoulder 21.
- the nut 22 is designed as a cap nut within which a further nut 24 lies, which is screwed onto a threaded axial extension 25 of the output shaft 3a and is supported on the inner ring 26 of the bearing 5.
- the brush block 16 is attached to the nut 22.
- a strain relief device 27 is provided for the cable 17, which is also releasably attached to the nut 22. The cable 17 is guided outwards from the gear housing 4 in a known manner.
- the strain gauges 8 and the angle encoder 18 are arranged on the output shaft 3a. Since the corresponding screwing tool 28 (FIG. 1) is attached to the output shaft 3a, the corresponding torques and angles of rotation can be measured directly during the screwing process and transmitted to the control electronics. There is no intermediate gear between the screwing tool 28 and the strain gauge 8 and the angle encoder 18, which could impair the measuring accuracy.
- the transmitter 10 is easily accessible, since it is accommodated on the end face of the output shaft 3a directly below a detachable cover 29 of the gear housing 4.
- FIG. 5 shows a further embodiment of a screwdriver.
- An angular gear 30 is provided as a reduction gear on the straight motor part 1 '.
- a bevel gear is provided as an angular gear, of which one bevel gear 31 is shown in FIG. 6. It also sits on the output shaft 3a ', which is rotatably supported with radial bearings 32 and 33 and an axial bearing 34 in the gear housing 4'.
- the axial bearing 34 is located in the area below the bevel gear 31, which is supported on the axial bearing.
- the output shaft 3a ' has the reduced torsion part 7' on which the strain gauges 8 'are attached.
- the supply lines 9 ' are led through the bore 11' in the output shaft 3a 'to the transformer 10', which is constructed in the same way as in the previously described embodiment.
- the rotation angle sensor 18' is provided, which is surrounded by the magnetic core 19 'which is fastened to the inside of the housing 4'. Lines 35 'which carry the angle of rotation signal from the angle of rotation sensor 18' are led through the bore 11 '.
- the transmitter 10 ' is accommodated in a recess 36 in the gear housing 4', which can be closed by the cover 29 '.
- the brush block 16 'sits on an inwardly projecting shoulder 37 of the housing 4'.
- the strain relief device 27 ' is fastened on the cover 29'.
- the transmission body 12 'fastened in the bore 11' rotates together with the output shaft 3a 'and the bevel gear 31, while the brush block 16' stands still with the cable 17 '.
- the bearings 32 to 34 are axially secured within the housing 4 '.
- the output shaft 3a' is provided with a connecting part 38 for the respective screwing tool.
- the measurements of the torque and the angle of rotation can in turn be carried out without interference from the angular gear, so that the parts to be screwed can be reliably brought, for example, to the yield point.
- the torque is measured by means of strain gauges as sensors.
- strain gauges instead of such strain gauges, piezo measuring elements can also be used.
- Inductive transducers or permeability measurements are also possible, which are carried out on the outer surface of the output shaft which is loaded by twisting.
- the slip rings 14, 14 ', 14' ' are provided at the points of contact with the sensors 15, 15', 15 '' with grooves, grooves or the like in order to ensure undisturbed transmission of measured values even in the event of axial shocks or small displacements of the output shaft 3a , 30 ', 3a' '.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Gear Transmission (AREA)
Claims (5)
- Dispositif de vissage comprenant un moteur d'entraînement (1) dont l'arbre moteur est solidarisé en entraînement, par l'intermédiaire d'un engrenage (2), avec un arbre de sortie (3a) permettant d'entraîner un outil de vissage (28), sur l'arbre de sortie (3a) maintenu dans des paliers (5, 6) étant montée une roue dentée de sortie (3), et au moins un capteur de mesure (8, 8') servant à la mesure du couple de rotation et/ou de l'angle de rotation, dont les signaux sont transmis par l'intermédiaire d'un translateur (12) à une électronique de mesure et de commande, caractérisé en ce que l'arbre de sortie (3a) présente dans la région entre la roue dentée de sortie (3) et un palier inférieur (6), une section de torsion (7) dont le diamètre est inférieur à celui de l'arbre de sortie (3a); que le capteur de mesure (8, 8') est collé à l'extérieur sur la section de torsion (7); que le translateur comprend un corps de transmission (12) solidaire en rotation avec l'une des extrémités (25) de l'arbre de sortie, auquel est associé au moins un capteur (15) solidaire du carter et relié à l'électronique de mesure et de commande; et que les lignes électriques (9, 9') reliant le capteur de mesure (8, 8') au corps de transmission (12) passent dans un alésage axial (11) prolongé dans l'arbre de sortie (3a) et débouchant dans la région de la section de torsion (7).
- Dispositif de vissage selon la revendication 1, caractérisé en ce que le capteur (15, 15', 15'') est appliqué contre une bague collectrice (14, 14', 14'') disposée dans une rainure annulaire du corps de transmission (12, 12').
- Dispositif de vissage selon l'une des revendications 1 ou 2, caractérisé en ce que plusieurs capteurs (15, 15', 15'') sont groupés en un ensemble disposé de manière rigide en rotation dans le carter (4, 4', 4'').
- Dispositif de vissage selon la revendication 3, caractérisé en ce que l'ensemble est fixé sur un écrou de recouvrement (22) qui recouvre l'extrémité libre de l'arbre de sortie (3a) et est vissé dans un taraudage (23) du carter (4).
- Dispositif de vissage selon l'une des revendications 1 à 4, caractérisé en ce que le translateur (10, 10', 10'') est placé dans un logement (36) du carter (4, 4', 4'') obturable par un couvercle (29, 29').
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8414766U | 1984-05-15 | ||
DE19848414766U DE8414766U1 (de) | 1984-05-15 | 1984-05-15 | Schrauber |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0164574A2 EP0164574A2 (fr) | 1985-12-18 |
EP0164574A3 EP0164574A3 (en) | 1987-12-16 |
EP0164574B1 true EP0164574B1 (fr) | 1991-11-27 |
Family
ID=6766891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85105627A Expired - Lifetime EP0164574B1 (fr) | 1984-05-15 | 1985-05-08 | Dispositif de vissage |
Country Status (3)
Country | Link |
---|---|
US (1) | US4648282A (fr) |
EP (1) | EP0164574B1 (fr) |
DE (2) | DE8414766U1 (fr) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8530993D0 (en) * | 1985-12-17 | 1986-01-29 | Crane Electronics | Torque transducers |
DE3714150A1 (de) * | 1987-04-28 | 1988-11-17 | Stabil Elektronik Gmbh | Vorrichtung zum messen der lastabhaengigen torsion einer rotierenden welle |
JP2511094B2 (ja) * | 1988-02-04 | 1996-06-26 | 株式会社日立製作所 | 回転角制御によるねじ締付け装置 |
US5018988A (en) * | 1989-10-10 | 1991-05-28 | Sps Technologies, Inc. | Electrical contact mechanism for ultrasonic transducers on fasteners |
US5115701A (en) * | 1990-09-26 | 1992-05-26 | Gse, Inc. | Drive mechanism and strain gauge mounting for a nutrunner appliance |
JPH04109867U (ja) * | 1991-03-07 | 1992-09-24 | 瓜生製作株式会社 | トルク制御式インパクトレンチ |
SE501155C2 (sv) * | 1993-04-21 | 1994-11-28 | Atlas Copco Tools Ab | Impulsmutterdragare |
DE4429282A1 (de) * | 1994-08-18 | 1996-02-22 | Cooper Ind Inc | Hydro-Impulsschrauber insbesondere zum Anziehen von Schraubverbindungen |
DE19507389A1 (de) * | 1995-03-03 | 1996-09-05 | Bosch Gmbh Robert | Einrichtung zur Signalübertragung, insbesondere für eine Schraubvorrichtung zum ultraschallgesteuerten Anziehen von Schraubverbindungen |
DE29607207U1 (de) * | 1996-04-20 | 1997-08-21 | Wagner, Paul-Heinz, 53804 Much | Hydraulischer Kraftschrauber |
SE509494C2 (sv) * | 1996-11-19 | 1999-02-01 | Atlas Copco Tools Ab | Kraftmutterdragare med momentgivare |
US6843326B2 (en) * | 2001-01-29 | 2005-01-18 | Pat Technologies Limited | Method and apparatus for determining when a fastener is tightened to a predetermined tightness by a pulse output tightening tool, and a pulsed output tightening tool incorporating the apparatus |
GB2414950B (en) * | 2004-06-12 | 2006-06-21 | Mobiletron Electronics Co Ltd | Elbow-type power hand tool |
US7552781B2 (en) | 2004-10-20 | 2009-06-30 | Black & Decker Inc. | Power tool anti-kickback system with rotational rate sensor |
FR2894172B1 (fr) * | 2005-12-01 | 2008-02-08 | Georges Renault Soc Par Action | Outillage de vissage a tete d'angle, incluant un capteur de couple monte sur l'arbre de sortie, et module de transmission correspondant. |
ITMI20070072A1 (it) | 2007-01-19 | 2008-07-20 | Atlas Copco Blm Srl | Dispositivo di rilevamento delle caratteristiche di coppia di un avvitatore |
US9266178B2 (en) | 2010-01-07 | 2016-02-23 | Black & Decker Inc. | Power tool having rotary input control |
US9475180B2 (en) | 2010-01-07 | 2016-10-25 | Black & Decker Inc. | Power tool having rotary input control |
US8418778B2 (en) | 2010-01-07 | 2013-04-16 | Black & Decker Inc. | Power screwdriver having rotary input control |
WO2011085194A1 (fr) * | 2010-01-07 | 2011-07-14 | Black & Decker Inc. | Tournevis motorisé possédant une commande d'entrée rotative |
ITMI20110286A1 (it) * | 2011-02-25 | 2012-08-26 | Scs Concept Italia S R L | Chiave idraulica |
EP2631035B1 (fr) | 2012-02-24 | 2019-10-16 | Black & Decker Inc. | Outil électrique |
US9802299B2 (en) * | 2015-03-24 | 2017-10-31 | Soartec Industrial Corp. | Torsion-detecting pneumatic impact tool |
US10589413B2 (en) | 2016-06-20 | 2020-03-17 | Black & Decker Inc. | Power tool with anti-kickback control system |
DE102017114536B3 (de) * | 2017-02-07 | 2018-07-05 | Schunk Gmbh & Co. Kg Spann- Und Greiftechnik | Verfahren und Vorrichtung zum Betätigen einer Hydro-Dehnspanneinrichtung |
EP3388199B1 (fr) * | 2017-04-13 | 2019-08-28 | Johannes Lübbering GmbH | Dispositif à vis et système à vis à main |
SE542008C2 (en) | 2018-04-26 | 2020-02-11 | Atlas Copco Ind Technique Ab | Electric power tool for tightening screw joints |
DE102018124402A1 (de) * | 2018-10-02 | 2020-04-02 | DSM Meßtechnik GmbH | Elektronisches Schraubwerkzeug |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3474503A (en) * | 1966-06-27 | 1969-10-28 | Joseph W Less | Articles of neckwear |
US3572447A (en) * | 1968-11-12 | 1971-03-30 | Ingersoll Rand Co | Torque measuring system for impact wrench |
US3596718A (en) * | 1969-07-02 | 1971-08-03 | Gardner Denver Co | Torque control system |
US3813933A (en) * | 1972-02-02 | 1974-06-04 | Sweeney Mfg Co | Dynamic torque indicators |
FR2179290A5 (fr) * | 1972-04-05 | 1973-11-16 | Maco Meudon Sa | |
US4084429A (en) * | 1976-05-03 | 1978-04-18 | Foster Cathead Corporation | Power tong apparatus |
US4104778A (en) * | 1977-01-27 | 1978-08-08 | Ingersoll-Rand Company | Method and apparatus for fastener tensioning |
US4162639A (en) * | 1977-05-11 | 1979-07-31 | G.K.N. Fasteners Limited | Load indicating nut wrench |
DE2721940A1 (de) * | 1977-05-14 | 1978-11-23 | Gkn Fasteners Ltd | Verfahren und vorrichtung zum festziehen einer mutter-gewindebolzen- verbindung |
GB1581101A (en) * | 1978-04-15 | 1980-12-10 | Gkn Fasteners Ltd | Wrench apparatus for tightening a nut and bolt assembly |
JPS5740624A (en) * | 1980-08-25 | 1982-03-06 | Honda Motor Co Ltd | Clamping torque detector for powered wrench |
DE3216773A1 (de) * | 1982-05-05 | 1983-11-10 | Dr. Staiger, Mohilo + Co GmbH, 7060 Schorndorf | Vorrichtung zum anziehen eines ein gewinde tragenden verbindungselements mit begrenzung des endanzugsdrehmoments |
US4544039A (en) * | 1983-04-01 | 1985-10-01 | Crane Electronics, Limited | Torque transducing systems for impact tools and impact tools incorporating such systems |
-
1984
- 1984-05-15 DE DE19848414766U patent/DE8414766U1/de not_active Expired
-
1985
- 1985-05-08 EP EP85105627A patent/EP0164574B1/fr not_active Expired - Lifetime
- 1985-05-08 DE DE8585105627T patent/DE3584736D1/de not_active Expired - Lifetime
- 1985-05-10 US US06/733,011 patent/US4648282A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US4648282A (en) | 1987-03-10 |
EP0164574A2 (fr) | 1985-12-18 |
EP0164574A3 (en) | 1987-12-16 |
DE3584736D1 (de) | 1992-01-09 |
DE8414766U1 (de) | 1984-09-13 |
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