EP0092736B1 - Transmitter for torque and/or angle measurement, particularly on power driven screwing tools - Google Patents

Transmitter for torque and/or angle measurement, particularly on power driven screwing tools Download PDF

Info

Publication number
EP0092736B1
EP0092736B1 EP83103552A EP83103552A EP0092736B1 EP 0092736 B1 EP0092736 B1 EP 0092736B1 EP 83103552 A EP83103552 A EP 83103552A EP 83103552 A EP83103552 A EP 83103552A EP 0092736 B1 EP0092736 B1 EP 0092736B1
Authority
EP
European Patent Office
Prior art keywords
housing
measuring sensor
sensor according
sub
torsion shaft
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
Application number
EP83103552A
Other languages
German (de)
French (fr)
Other versions
EP0092736A1 (en
Inventor
Alfred Hettich
Wolfgang Raidt
Karl Roll
Wilhelm W. Schwarze
Reinhold Stroezel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0092736A1 publication Critical patent/EP0092736A1/en
Application granted granted Critical
Publication of EP0092736B1 publication Critical patent/EP0092736B1/en
Expired legal-status Critical Current

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 is based on a transmitter according to the preamble of the main claim.
  • a sensor is already known from DE-OS 29 51 148. There, however, the question of installing such a sensor in a transmission or a machine housing is not addressed. In particular, when using such sensors for motor-driven screwdrivers, problems arose for a construction which was favorable in terms of production technology and thus economically. The difficulties already encountered with other sensors when trying to transmit the electrical signals from the sensor without interference to suitable display means still exist here.
  • the transducer according to the invention with the characterizing features of the main claim has the advantage that it can be easily inserted into the housing of a machine or a transmission or attached to this housing without the basic structure of the machine or the gear must be changed.
  • the measures listed in the subclaims are advantageous developments and improvements of the transmitter specified in the main claim. possible.
  • the selected design with two slotted sleeves that overlap the torsion area of a torsion shaft enables a space-saving design.
  • Motor-operated screwdrivers, especially designed as hand tools, remain slim and handy despite being equipped with the sensor.
  • the simple solution for the interference-free transmission of the electrical signals shown by the invention has the additional advantage that the tube serving to guide the cable and protect the cable is also used as a hand protection.
  • the construction of the transmitter as a module allows the length tolerances to be coordinated within this module, which largely eliminates measurement errors due to axial displacement of the system. In the case of an arrangement mounted on both sides, influences due to axial displacement are completely excluded.
  • Figure 1 shows a first embodiment of an angle screwdriver with an inserted transducer in longitudinal section
  • Figure 2 shows a second embodiment of the screwdriver with attached transducer in longitudinal section
  • Figure 3 shows a side view of the inner
  • Figure 4 shows a side view of the outer of two slotted sleeves, in both embodiments are the same.
  • an angle screwdriver 1 is supplemented with a sensor module 2.
  • a planetary gear 4 is arranged in the gear housing 3 of the angle screwdriver 1.
  • a sleeve 5 with an internal toothing 6 forms the end member of this planetary gear 4.
  • the sleeve 5 is supported by a ball bearing 7 in the gear housing 3.
  • the internal toothing 6 can accommodate the toothed end 8 of a torsion shaft 9.
  • the other end of this torsion shaft 9 has a cylindrical head 10 with an internal toothing 11.
  • the internal toothing 11 is the same as the internal toothing 6 in the sleeve 5.
  • a cylindrical extension 12 of the torsion shaft 9 receives a slotted sleeve 13.
  • the sleeve 13 is glued to the cylindrical extension so that the part of the sleeve 13 with slots 14 engages over the area 15 of the torsion shaft 9 provided for torsion.
  • a sleeve 16 slotted in the same way as the sleeve 13 is glued onto the head 10 of the torsion shaft 9 in such a way that its part with slots 17 engages over the part of the sleeve 13 with the slots 14.
  • the webs between the slots 17 cover the slots 14.
  • the slot sleeve 16 is in turn surrounded in the area of its slots 17 by a sleeve 18 which carries a winding 19.
  • the coil former formed from this sleeve 18 and the winding 19 is glued into the cylindrical interior of a module housing 21.
  • the module housing 21 has an outlet connection 22 for a cable 23. Wire ends 24 and 25 from this cable 23 are with the winding 19 on the sleeve 18 connected.
  • the outlet connector 22 has a receiving bore 26 for a tube 27. A screw 28 in a threaded bore in the outlet connector 22 serves to clamp the tube 27 in the receiving bore 26.
  • the cable 23 is passed through the tube 27 into a sleeve 29.
  • the sleeve 29 is attached by means of a tab 30 to the end of a machine housing 31.
  • the sleeve 29 receives a socket 32, which serves as a connector for a continuing cable.
  • the cable ends 33 and 34 on this side are connected to corresponding contact sleeves 35 and 36 of the socket 32.
  • the pipe 27 is additionally supported with a clamp holder 37 between the outlet connection 22 and the sleeve 29.
  • the pipe section between the clamp holder 37 and the sleeve 29 overlaps the area 38 of the machine housing 31 designed as a handle for the operator, in which an operating handle 39 is also arranged. This part of the tube 27 thus becomes hand protection for the operator.
  • the gear housing 3 and the assembly housing 21 are connected to the outside of the gear housing 3 via a coupling toothing 40, 41 and a threaded connection spanning these with a threaded sleeve 42, a locking ring 43 and a thread 44.
  • the same connection with coupling toothing 40/41, threaded sleeve 42, locking ring 43 and an external thread 44 - here at the end of the module housing 21 - is established between the module housing 21 and a spindle housing 45 of the angle screwdriver 1.
  • the spindle housing 45 is supported by means of a roller bearing 46 and one Axial bearing 47 a spindle 48.
  • the axial bearing 49 is held in the spindle housing 45 by means of a nut 49.
  • a toothed pin 50 of the spindle 48 engages in the internal toothing 11.
  • the other end of the spindle 48 is connected to an output member 51 of the angle screwdriver 1 via a gear mechanism (not shown).
  • a square pin 52 of the output member 51 comes out and can hold any screwing tool.
  • the slotted sleeves 13 and 16 are again shown separately in FIGS. 3 and 4 in order to better show the arrangement of the slots 14 and 17.
  • a connecting nut 53 is used to connect an air hose. Compressed air is supplied via it to an air motor (not shown) in the machine housing 31.
  • the same slotted sleeves 13 and 16 and the same sleeve 18 with the winding 19 are used.
  • a torsion shaft 54 is used, which is both the output member and the spindle and has a square pin 55.
  • An internal hexagon 57 is machined into a head 56 of this torsion shaft 54.
  • a hexagon pin of a gear end member of a screwdriver, not shown here, can engage in this hexagon socket.
  • the slotted sleeves 13 and 16 are glued to the torsion shaft 54 in the same way as with the torsion shaft 9.
  • a ball bearing 58 supports the torsion shaft 54 with the slotted sleeve 13 in a module housing 59.
  • the module housing is sealed towards the screwdriver by sealing means 60 to 62, which are inserted into a recess 63 in the module housing 59 and are located on the circumference of the head 56 of the torsion shaft 54 invest.
  • a radial bore 64 in the module housing 59 serves as a passage for a cable 65.
  • This cable 65 is clamped on the outside of the module housing 59 by a screw 66 and a clamp 67.
  • the wire ends 68 and 69 from the cable 65 are connected to the single-layer winding 19.
  • the other end of the cable 65 leads to a plug coupling 70, via which the signals transmitted via the cable are forwarded in a known manner to the measuring devices.
  • This transducer with the module housing 59 can be connected to the machine housing or the gear housing of a screwdriver via a threaded attachment 71. It serves as a resolution here.

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)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Meßwertgeber nach der Gattung des Hauptanspruchs. Es ist schon ein solcher Meßwertgeber bekannt aus der DE-OS 29 51 148. Dort ist jedoch die Frage des Einbaus eines solchen Meßwertgebers in ein Getriebe oder ein Maschinengehäuse nicht angesprochen. Besonders beim Einsatz solcher Meßwertgeber für motorgetriebene Schrauber ergaben sich Probleme für einen fertigungstechnisch und damit wirtschaftlich günstigen Aufbau. Auch die schon bei anderen Gebern aufgetretenen Schwierigkeiten beim Versuch die elektrischen Signale vom Meßwertgeber störungsfrei auf geeignete Anzeigemittel zu übertragen, bestehen hier nach wie vor.The invention is based on a transmitter according to the preamble of the main claim. Such a sensor is already known from DE-OS 29 51 148. There, however, the question of installing such a sensor in a transmission or a machine housing is not addressed. In particular, when using such sensors for motor-driven screwdrivers, problems arose for a construction which was favorable in terms of production technology and thus economically. The difficulties already encountered with other sensors when trying to transmit the electrical signals from the sensor without interference to suitable display means still exist here.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Meßwertgeber mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß er leicht in das Gehäuse einer Maschine oder eines Getriebes eingefügt bzw. an dieses Gehäuse angefügt werden kann, ohne daß der Grundaufbau der Maschine oder des Getriebes verändert werden muß. Durch die Ausstattung des Meßwertgebers mit einem eigenen Gehäuse und Kupplungsmitteln die am Maschinengehäuse und am Endglied des Getriebes der maschine bereits vorhanden sind, ist es auf einfache Weise möglich, vorhandene Maschinen oder Getriebe nachträglich mit ihm auszustatten.The transducer according to the invention with the characterizing features of the main claim has the advantage that it can be easily inserted into the housing of a machine or a transmission or attached to this housing without the basic structure of the machine or the gear must be changed. By equipping the transducer with its own housing and coupling means that are already present on the machine housing and on the end member of the gearbox of the machine, it is easily possible to retrofit existing machines or gearboxes with it.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Meßwertgebers. möglich. Der gewählte Aufbau mit zwei geschlitzten Hülsen, die den Torsionsbereich einer Torsionswelle übergreifen, ermöglicht eine raumsparende Bauweise. Besonders als Handwerkzeug ausgebildete, motorgetriebene Schrauber bleiben trotz Ausrüstung mit dem Meßwertgeber schlank und handlich. Bei solchen Geräten hat die durch die Erfindung aufgezeigte einfache Lösung für das störungsfreie Übertragen der elektrischen Signale den zusätzlichen Vorteil, daß das der Kabelführung und dem Schutz des Kabels dienende Rohr zugleich als Handschutz eingesetzt ist. Der Aufbau des Meßwertgebers als Baugruppe gestattet eine Abstimmung der Längentoleranzen innerhalb dieser Baugruppe, der Meßfehler durch axiales Verschieben des Systems weitgehend ausschaltet. Bei beidseitig gelagerter Anordnung sind Einflüsse durch axiales Verschieben ganz ausgeschlossen.The measures listed in the subclaims are advantageous developments and improvements of the transmitter specified in the main claim. possible. The selected design with two slotted sleeves that overlap the torsion area of a torsion shaft enables a space-saving design. Motor-operated screwdrivers, especially designed as hand tools, remain slim and handy despite being equipped with the sensor. In such devices, the simple solution for the interference-free transmission of the electrical signals shown by the invention has the additional advantage that the tube serving to guide the cable and protect the cable is also used as a hand protection. The construction of the transmitter as a module allows the length tolerances to be coordinated within this module, which largely eliminates measurement errors due to axial displacement of the system. In the case of an arrangement mounted on both sides, influences due to axial displacement are completely excluded.

Zeichnungdrawing

Zwei Ausführungsbeispiele des Erfindungsgegenstandes sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 ein erstes Ausführungsbeispiel eines Winkelschraubers mit eingesetzem Meßwertgeber im Längsschnitt, Figur 2 ein zweites Ausführungsbeispiel des Schraubers mit angesetztem Meßwertgeber im Längsschnitt, Figur 3 eine Seitenansicht der inneren und Figur 4 eine Seitenansicht der äußeren von zwei geschlitzten Hülsen, die in beiden Ausführungsbeispielen gleich sind.Two embodiments of the subject of the invention are shown in the drawing and explained in more detail in the following description. Figure 1 shows a first embodiment of an angle screwdriver with an inserted transducer in longitudinal section, Figure 2 shows a second embodiment of the screwdriver with attached transducer in longitudinal section, Figure 3 shows a side view of the inner and Figure 4 shows a side view of the outer of two slotted sleeves, in both embodiments are the same.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Im ersten Ausführungsbeispiel nach den Figuren 1, und 4 ist ein Winkelschrauber 1 mit einer Meßwertgeberbaugruppe 2 ergänzt. Im Getriebegehäuse 3 des Winkelschraubers 1 ist ein Planetengetriebe 4 angeordnet. Eine Hülse 5 mit einer Innenverzahnung 6 bildet das Endglied dieses Planetengetriebes 4. Die Hülse 5 ist über ein Kugellager 7 im Getriebegehäuse 3 abgestützt. Die Innenverzahnung 6 kann das verzahnte Ende 8 einer Torsionswelle 9 aufnehmen. Das andere Ende dieser Torsionswelle 9 besitzt einen zylindrischen Kopf 10 mit einer Innenverzahnung 11. Die Innenverzahnung 11 ist mit der Innenverzahnung 6 in der Hülse 5 gleich. Ein zylindrischer Ansatz 12 der Torsionswelle 9 nimmt eine geschlitzte Hülse 13 auf. Dabei ist die Hülse 13 mit dem zylindrischen Ansatz so verklebt, daß der Teil der Hülse 13 mit Schlitzen 14 den für die Torsion vorgesehenen Bereich 15 der Torsionswelle 9 übergreift. Eine in der gleichen Weise wie die Hülse 13 geschlitzte Hülse 16 ist so auf den Kopf 10 der Torsionswelle 9 aufgeklebt, daß ihr Teil mit Schlitzen 17 den Teil der Hülse 13 mit den Schlitzen 14 übergreift. Bei unbelasteter Torsionswelle 9 überdecken die Stege zwischen den Schlitzen 17 die Schlitze 14. Die geschlitzte Hülse 16 ist ihrerseits im Bereich ihrer Schlitze 17 umgeben von einer Hülse 18, die eine Wicklung 19 trägt. Der aus dieser Hülse 18 und der Wicklung 19 gebildete Spulenkörper ist eingeklebt in den zylindrischen Innenraum eines Baugruppengehäuses 21. Das Baugruppengehäuse 21 besitzt einen Auslaßstutzen 22 für ein Kabel 23. Drahtenden 24 und 25 aus diesem Kabel 23 sind mit der Wicklung 19 auf der Hülse 18 verbunden. Der Auslaßstutzen 22 besitzt eine Aufnahmebohrung 26 für ein Rohr 27. Eine Schraube 28 in einer Gewindebohrung im Auslaßstutzen 22 dient zum Festklemmen des Rohrs 27 in der Aufnahmebohrung 26. Das Kabel 23 ist durch das Rohr 27 weitergeführt bis in eine Hülse 29. Die Hülse 29 ist mittels einer Lasche 30 am Ende eines Maschinengehäuses 31 befestigt. Außerdem nimmt die Hülse 29 eine Steckdose 32 auf, die als Steckverbindung für ein weiterführendes Kabel dient. Die diesseitigen Kabelenden 33 und 34 sind mit entsprechenden Kontakthülsen 35 und 36 der Steckdose 32 verbunden. Zwischen dem Auslaßstutzen 22 und der Hülse 29 ist das Rohr 27 mit einem Klemmhalter 37 zusätzlich abgestützt. Das Rohrstück zwischen dem Klemmhalter 37 und der Hülse 29 übergreift den als Handgriff für den Bedienenden ausgebildeten Bereich 38 des Maschinengehäuses 31, in dem auch eine Bedienungshandhabe 39 angeordnet ist. So wird dieser Teil des Rohrs 27 zum Handschutz für den Bedienenden.In the first exemplary embodiment according to FIGS. 1 and 4, an angle screwdriver 1 is supplemented with a sensor module 2. A planetary gear 4 is arranged in the gear housing 3 of the angle screwdriver 1. A sleeve 5 with an internal toothing 6 forms the end member of this planetary gear 4. The sleeve 5 is supported by a ball bearing 7 in the gear housing 3. The internal toothing 6 can accommodate the toothed end 8 of a torsion shaft 9. The other end of this torsion shaft 9 has a cylindrical head 10 with an internal toothing 11. The internal toothing 11 is the same as the internal toothing 6 in the sleeve 5. A cylindrical extension 12 of the torsion shaft 9 receives a slotted sleeve 13. The sleeve 13 is glued to the cylindrical extension so that the part of the sleeve 13 with slots 14 engages over the area 15 of the torsion shaft 9 provided for torsion. A sleeve 16 slotted in the same way as the sleeve 13 is glued onto the head 10 of the torsion shaft 9 in such a way that its part with slots 17 engages over the part of the sleeve 13 with the slots 14. When the torsion shaft 9 is not loaded, the webs between the slots 17 cover the slots 14. The slot sleeve 16 is in turn surrounded in the area of its slots 17 by a sleeve 18 which carries a winding 19. The coil former formed from this sleeve 18 and the winding 19 is glued into the cylindrical interior of a module housing 21. The module housing 21 has an outlet connection 22 for a cable 23. Wire ends 24 and 25 from this cable 23 are with the winding 19 on the sleeve 18 connected. The outlet connector 22 has a receiving bore 26 for a tube 27. A screw 28 in a threaded bore in the outlet connector 22 serves to clamp the tube 27 in the receiving bore 26. The cable 23 is passed through the tube 27 into a sleeve 29. The sleeve 29 is attached by means of a tab 30 to the end of a machine housing 31. In addition, the sleeve 29 receives a socket 32, which serves as a connector for a continuing cable. The cable ends 33 and 34 on this side are connected to corresponding contact sleeves 35 and 36 of the socket 32. The pipe 27 is additionally supported with a clamp holder 37 between the outlet connection 22 and the sleeve 29. The pipe section between the clamp holder 37 and the sleeve 29 overlaps the area 38 of the machine housing 31 designed as a handle for the operator, in which an operating handle 39 is also arranged. This part of the tube 27 thus becomes hand protection for the operator.

Das Getriebegehäuse 3 und das Baugruppengehäuse 21 sind über eine Kupplungsverzahnung 40, 41 und eine diese übergreifende Gewindeverbindung mit einer Gewindehülse 42, einem Sicherungsring 43 und einem Gewinde 44 außen auf dem Getriebegehäuse 3 verbunden. Die gleiche Verbindung mit Kupplungsverzahnung 40/41, Gewindehülse 42, Sicherungsring 43 und einem Außengewinde 44 - hier am Ende des Baugruppengehäuses 21 - ist hergestellt zwischen dem Baugruppengehäuse 21 und einem Spindelgehäuse 45 des Winkelschraubers 1. Im Spindelgehäuse 45 lagert mittels eines Rollenlagers 46 und eines Axiallagers 47 eine Spindel 48. Das Axiallager 49 ist im Spindelgehäuse 45 mittels einer Mutter 49 gehalten. Durch diese Mutter 49, die in das Spindelgehäuse 45 eingeschraubt ist, greift ein verzahnter Zapfen 50 der Spindel 48 in die Innenverzahnung 11. Das andere Ende der Spindel 48 ist über ein nicht dargestelltes Zahnradgetriebe mit einem Abtriebsglied 51 des Winkelschraubers 1 verbunden. Ein Vierkantzapfen 52 des Abtriebgliedes 51 tritt nach außen und kann ein beliebiges Schraubwerkzeug aufnehmen. Die geschlitzten Hülsen 13 und 16 sind in den Figuren 3 und 4 nochmals gesondert dargestellt, um die Anordnung der Schlitze 14 und 17 besser zeigen zu können. Eine Anschlußmutter 53 dient zum Anschluß eines Luftschlauchs. Über ihn wird einem nicht dargestellten Luftmotor im Maschinengehäuse 31 Druckluft zugeführt.The gear housing 3 and the assembly housing 21 are connected to the outside of the gear housing 3 via a coupling toothing 40, 41 and a threaded connection spanning these with a threaded sleeve 42, a locking ring 43 and a thread 44. The same connection with coupling toothing 40/41, threaded sleeve 42, locking ring 43 and an external thread 44 - here at the end of the module housing 21 - is established between the module housing 21 and a spindle housing 45 of the angle screwdriver 1. In the spindle housing 45 is supported by means of a roller bearing 46 and one Axial bearing 47 a spindle 48. The axial bearing 49 is held in the spindle housing 45 by means of a nut 49. Through this nut 49, which is screwed into the spindle housing 45, a toothed pin 50 of the spindle 48 engages in the internal toothing 11. The other end of the spindle 48 is connected to an output member 51 of the angle screwdriver 1 via a gear mechanism (not shown). A square pin 52 of the output member 51 comes out and can hold any screwing tool. The slotted sleeves 13 and 16 are again shown separately in FIGS. 3 and 4 in order to better show the arrangement of the slots 14 and 17. A connecting nut 53 is used to connect an air hose. Compressed air is supplied via it to an air motor (not shown) in the machine housing 31.

Beim Arbeiten mit dem Winkelschrauber 1 wird die Kraft des Motors über die Torsionswelle 9 zum Abtriebsglied 51 hin übertragen. Beim Schraubvorgang übertragene Drehmomente bewirken ein Verdrehen der Enden der Torsionswelle 9 gegeneinander. Damit verdrehen sich auch die geschlitzten Hülsen 13 und 16 gegeneinander und verändern durch Ändern des Wirbelstromfeldes die Impedanz in der Spule mit der Wicklung 19. Diese Veränderungen werden als Meßwerte auf entsprechende, hier nicht näher dargestellte Meßgeräte übertragen und dort ausgewertet. Durch die gewählte Ausbildung des Meßwertgebers als Meßwertgeberbaugruppe 2 kann diese Meßwertgeberbaugruppe 2 in einen Winkelschrauber 1 eingesetzt werden der bisher ohne solchen Meßwertgeber arbeitete. Durch das Rohr 27 ist eine störungsfreie Übertragung der Meßwerte gewährleistet und zugleich die Hand des Bedienenden wirkungsvoll geschützt.When working with the angle screwdriver 1, the force of the motor is transmitted to the output member 51 via the torsion shaft 9. Torques transmitted during the screwing process cause the ends of the torsion shaft 9 to rotate relative to one another. The slotted sleeves 13 and 16 thus also rotate against one another and change the impedance in the coil with the winding 19 by changing the eddy current field. These changes are transmitted as measured values to corresponding measuring devices (not shown here) and evaluated there. Due to the selected design of the sensor as a sensor module 2, this sensor module 2 can be inserted into an angle screwdriver 1 which previously worked without such a sensor. The tube 27 ensures trouble-free transmission of the measured values and at the same time effectively protects the operator's hand.

Im Ausführungsbeispiel nach Figur 2 sind die gleichen geschlitzten Hülsen 13 und 16 und die gleiche Hülse 18 mit der Wicklung 19 verwendet. Anstelle der Torsionswelle 9 ist eine Torsionswelle 54 verwendet, die zugleich Abtriebsglied und Spindel ist und einen Vierkantzapfen 55 aufweist. In einem Kopf 56 dieser Torsionswelle 54 ist ein Innensechskant 57 eingearbeitet. In dieses Innensechskant kann ein Sechskantzapfen eines hier nicht näher dargestellten Getriebeendgliedes eines Schraubers eingreifen. Die geschlitzten Hülsen 13 und 16 sind in gleicher Weise wie mit der Torsionswelle 9 auch mit der Torsionswelle 54 verklebt. Ein Kugellager 58 lagert die Torsionswelle 54 mit der geschlitzten Hülse 13 in einem Baugruppengehäuse 59. Zum Schrauber hin ist das Baugruppengehäuse durch Dichtmittel 60 bis 62 abgedichtet, die in eine Ausdrehung 63 im Baugruppengehäuse 59 eingelegt sind und sich am Umfang des Kopfes 56 der Torsionswelle 54 anlegen. Eine Radialbohrung 64 im Baugruppengehäuse 59 dient als Durchlaß für ein Kabel 65. Dieses Kabel 65 ist außen am Baugruppengehäuse 59 durch eine Schraube 66 und eine Schelle 67 festgeklemmt. Die Drahtenden 68 und 69 aus dem Kabel 65 sind mit der einschichtigen Wicklung 19 verbunden. Das andere Ende des Kabels 65 führt zu einer Steckerkupplung 70, über die die über das Kabel übertragenen Signale in bekannter Weise weitergeleitet werden zu den Meßgeräten.In the exemplary embodiment according to FIG. 2, the same slotted sleeves 13 and 16 and the same sleeve 18 with the winding 19 are used. Instead of the torsion shaft 9, a torsion shaft 54 is used, which is both the output member and the spindle and has a square pin 55. An internal hexagon 57 is machined into a head 56 of this torsion shaft 54. A hexagon pin of a gear end member of a screwdriver, not shown here, can engage in this hexagon socket. The slotted sleeves 13 and 16 are glued to the torsion shaft 54 in the same way as with the torsion shaft 9. A ball bearing 58 supports the torsion shaft 54 with the slotted sleeve 13 in a module housing 59. The module housing is sealed towards the screwdriver by sealing means 60 to 62, which are inserted into a recess 63 in the module housing 59 and are located on the circumference of the head 56 of the torsion shaft 54 invest. A radial bore 64 in the module housing 59 serves as a passage for a cable 65. This cable 65 is clamped on the outside of the module housing 59 by a screw 66 and a clamp 67. The wire ends 68 and 69 from the cable 65 are connected to the single-layer winding 19. The other end of the cable 65 leads to a plug coupling 70, via which the signals transmitted via the cable are forwarded in a known manner to the measuring devices.

Die Ausführung dieses Meßwertgebers mit dem Baugruppengehäuse 59 kann über einen Gewindeansatz 71 mit dem Maschinengehäuse oder dem Getriebegehäuse eines Schraubers verbunden werden. Sie dient hier als Vorsatz.The execution of this transducer with the module housing 59 can be connected to the machine housing or the gear housing of a screwdriver via a threaded attachment 71. It serves as a resolution here.

Claims (14)

1. Measuring sensor for measuring torque and/or angles of rotation on motor-driven screwdrivers, with a torsionally elastic member (9, 54) which is inserted in the transmission chain from the motor to the screwing element and the ends of which are each connected fixedly in terms of rotation to one of two bodies of revolution which are rotatable relative to one another and have recesses and which thus, in different relative positions in relation to one another, exert different influences on electromagnetic fields generated in their vicinity, characterised in that the measuring sensor is combined in an independent sub-assembly (2) with its own housing (21. 59), and in that the sub-assembly contains coupling means (40 to 44) for insertion into the machine housing or transmission housing (3) or for attachment to the machine housing or transmission housing and means (6 to 8, 11 to 50, 57) for . inserting the torsional elastic member (9, 54) into the transmission chain from the motor to the power take-off member (51, 54).
2. Measuring sensor according to Claim 1. characterised in that the sub-assembly housing (21, 59) has an orifice (64) and/or connection parts (22, 27, 66 to 67) for receiving a cable (23, 65).
3. Measuring sensor according to one of Claims 1 and 2, characterised in that the sub-assembly housing (21) has coupling toothing (40 to 41) and/or parts (42 to 44) of a threaded connection to the transmission housing (3), which make it easier to assemble the sub-assembly housing (21) and the transmission housing (3) in the peripheral direction.
4. Measuring sensor according to one of Claims 1 to 3, characterised in that there is fastened to the sub-assembly housing (21) a tube (27) which serves for receiving the cable (23) and which, as protection for the hand, engages over the region .(38) of the machine (1) designed as a handle for the operator.
5. Measuring sensor according to Claim 4, characterised in that the tube (27) ends in a sleeve (29) which is fastened to the end of the machine housing (31) by means of a strap (30) and receives a socket (32) for a plug connection to a continuing cable.
6. Measuring sensor according to one of Claims 4 and 5, characterised in that the tube (27) is additionally supported, in the vicinity of the region (38) of the machine (1) designed as a handle, by means of a clamping holder (37).
7. Measuring sensor according to one of Claims 1 to 6, characterised in that the sub-assembly housing (59) is at the same time a spindle bearing for the screwdriver spindle.
8. Measuring sensor according to one of Claims 1 to 7, characterised in that the torsionally elastic member is a torsion shaft (9, 54), in that a slotted sleeve (13, 16) consisting of electrically conductive material is fastened respectively to the end of this torsion shaft on the drive side and to its end on the power take-off side, these sleeves engaging over one another and, in the relaxed state of the torsion shaft (9, 54), mutually covering their slots (14, 17), and in that the sleeves (13, 16) are surrounded by a coil form (18 to 19) which is fastened in the sub-assembly housing (21, 59).
9. Measuring sensor according to one of Claims 1 to 8, characterised in that it incorporates as a coil form, on the inside or outside, a sleeve (18) as a carrier of a winding (19) which is glued into the sub-assembly housing (21, 59).
10. Measuring sensor according to one of Claims 1 to 9, characterised in that it incorporates two slotted sleeves (13, 16), each of which is glued firmly to one end of a torsion shaft (9, 54).
11. Measuring sensor according to one of Claims 1 to 10, characterised in that the torsion shaft (9) is designed at at least one end as a plug coupling (8, 11).
12. Measuring sensor according to one of Claims 1 to 10. characterised in that the torsion shaft (54) itself forms the end of a screwdriver spindle and has key faces (55, 57) at both ends.
13. Measuring sensor according to one of Claims 1 to 12, characterised in that the sub-assembly housing (59) is sealed off from the machine housing.
14. Measuring sensor according to one of Claims 1 to 13, characterised in that the coupling means of the sub-assembly housing and of the torsionally elastic member are identical to the coupling means of the spindle bearing and of the screwdriver spindle and to the coupling means of the machine housing and of the output member. of the transmission.
EP83103552A 1982-04-22 1983-04-13 Transmitter for torque and/or angle measurement, particularly on power driven screwing tools Expired EP0092736B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823214889 DE3214889A1 (en) 1982-04-22 1982-04-22 MEASURING VALVE FOR TORQUE AND / OR TURNING ANGLE MEASUREMENT, ESPECIALLY ON MOTOR DRIVEN SCREWDRIVERS
DE3214889 1982-04-22

Publications (2)

Publication Number Publication Date
EP0092736A1 EP0092736A1 (en) 1983-11-02
EP0092736B1 true EP0092736B1 (en) 1985-08-07

Family

ID=6161579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103552A Expired EP0092736B1 (en) 1982-04-22 1983-04-13 Transmitter for torque and/or angle measurement, particularly on power driven screwing tools

Country Status (4)

Country Link
US (1) US4485682A (en)
EP (1) EP0092736B1 (en)
JP (1) JPS58196977A (en)
DE (2) DE3214889A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29612693U1 (en) * 1996-07-23 1996-09-19 Wagner Paul Heinz Screwdriver

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3344385A1 (en) * 1983-12-08 1985-06-20 Robert Bosch Gmbh, 7000 Stuttgart TOUCH-FREE MEASURING DEVICE FOR TORQUE AND / OR TURNING ANGLE
DE3443670A1 (en) * 1984-11-30 1986-06-05 C. & E. Fein Gmbh & Co, 7000 Stuttgart POWER-DRIVEN SCREW DEVICE WITH VARIABLE TORQUE ADJUSTMENT
US4712432A (en) * 1984-11-30 1987-12-15 Al Sin Seiki Kabushiki Kaisha Torque sensor
JPS61247932A (en) * 1985-04-26 1986-11-05 Matsushita Electric Ind Co Ltd Torque sensor
US4712433A (en) * 1985-10-18 1987-12-15 Aisin Seiki Kabushiki Kaisha Torque sensor for automotive power steering systems
DE3714150A1 (en) * 1987-04-28 1988-11-17 Stabil Elektronik Gmbh Device for measuring the load-dependent torsion of a rotating shaft
US4759225A (en) * 1987-06-01 1988-07-26 Ryeson Corporation Torque tool and torque tool analyzer
US4982612A (en) * 1988-10-03 1991-01-08 Snap-On Tools Corporation Torque wrench with measurements independent of hand-hold position
DE3922860A1 (en) * 1989-07-12 1991-01-17 Bosch Gmbh Robert MEASURING DEVICE FOR DETERMINING TORQUE
DE4243069C2 (en) * 1992-12-18 2001-09-27 Gardner Denver Gmbh Pulse tool, especially pulse screwdriver
DE4329200C2 (en) * 1993-08-31 2001-08-23 Bosch Gmbh Robert Motor driven screwdriver
DE4329199C2 (en) * 1993-08-31 1996-01-11 Bosch Gmbh Robert Measuring device for detecting a torque, in particular for use in motor-driven screwdrivers
SE503326C2 (en) * 1994-07-08 1996-05-28 Atlas Copco Tools Ab Angle Impact Wrench
DE4429282A1 (en) * 1994-08-18 1996-02-22 Cooper Ind Inc Hydro impulse wrench especially for tightening screw connections
DE19604489C2 (en) * 1996-02-08 2000-03-23 Heidenhain Gmbh Dr Johannes Electrical position measuring device
DE29607207U1 (en) * 1996-04-20 1997-08-21 Wagner Paul Heinz Hydraulic power wrench
SE509494C2 (en) * 1996-11-19 1999-02-01 Atlas Copco Tools Ab Power nut puller with torque sensor
US6463824B1 (en) * 2000-02-29 2002-10-15 S-B Power Tool Company Right angle attachment for power hand tool
US6523442B2 (en) * 2000-12-07 2003-02-25 Acradyne Inc. Torque tool assembly
DE10154737C1 (en) * 2001-11-09 2003-04-24 Walterscheid Gmbh Gkn Torque and rotation direction measuring device for drive uses evaluation of sensor pulse sequences representing rotation of torsion shaft and reference element
SE524192C2 (en) * 2002-06-03 2004-07-06 Bo Tillander Tool holders
CN100574946C (en) * 2005-06-01 2009-12-30 密尔沃基电动工具公司 Power tool
IT1391943B1 (en) * 2008-11-14 2012-02-02 Atlas Copco Blm Srl IMPROVED DEVICE WITH REPLACEMENT ELEMENTS FOR CALIBRATION OF SCREWDRIVERS
US9212725B2 (en) * 2011-03-31 2015-12-15 Ingersoll-Rand Company Ring gears configured to encase in-line torque transducers for power tools
US10427277B2 (en) * 2011-04-05 2019-10-01 Ingersoll-Rand Company Impact wrench having dynamically tuned drive components and method thereof
WO2011156918A2 (en) * 2011-09-02 2011-12-22 Dan Provost Assembly, intercalated between a torque tool and a fastening element, for measuring torques and tightening angles
FR2983107B1 (en) * 2011-11-25 2014-12-05 Renault Georges Ets SPINDLE TYPE ELECTRIC SCREWDRIVER TO BE FIXED ON A BUILDING.
CN104827435B (en) * 2012-04-11 2016-06-22 国网山东省电力公司龙口市供电公司 A kind of pneumatic impact spanner for power industry determine torque force device
US9193055B2 (en) 2012-04-13 2015-11-24 Black & Decker Inc. Electronic clutch for power tool
US10357871B2 (en) 2015-04-28 2019-07-23 Milwaukee Electric Tool Corporation Precision torque screwdriver
EP3750671B1 (en) 2015-04-28 2023-02-01 Milwaukee Electric Tool Corporation Precision torque screwdriver
CN107081707A (en) * 2017-05-11 2017-08-22 山东帝伯教育科技有限公司 A kind of torsion ring for being used to determine torsion
SE542008C2 (en) * 2018-04-26 2020-02-11 Atlas Copco Ind Technique Ab Electric power tool for tightening screw joints

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951148A1 (en) * 1979-12-19 1981-07-09 Robert Bosch Gmbh, 7000 Stuttgart MEASURING DEVICE FOR A TURNING ANGLE AND / OR A TORQUE

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2617971A (en) * 1950-12-04 1952-11-11 Crane Packing Co Overload control for motors
GB790692A (en) * 1955-05-12 1958-02-12 Marconi Wireless Telegraph Co Improvements in or relating to torque meters
US3729991A (en) * 1971-05-17 1973-05-01 Spearhead Inc Capacitive displacement transducer
JPS4956298A (en) * 1972-09-30 1974-05-31
US3823608A (en) * 1972-10-25 1974-07-16 Southern Gas Ass Torque transducer
US3858444A (en) * 1973-02-09 1975-01-07 Chicago Pneumatic Tool Co Angle nut runner with integral torque transducer means of obtaining value of delivered torque
US3920082A (en) * 1973-05-14 1975-11-18 Thor Power Tool Co Power tool with torque sensing control means
US4223555A (en) * 1973-10-09 1980-09-23 Rockwell International Corporation Fastener tools
US4147219A (en) * 1977-11-21 1979-04-03 Chicago Pneumatic Tool Company Two-speed offset nutrunner
DE3018938A1 (en) * 1980-05-17 1981-11-26 Robert Bosch Gmbh, 7000 Stuttgart HAND MACHINE TOOL
DE3023005C2 (en) * 1980-06-20 1982-12-16 Maschinenfabrik Wagner GmbH & Co KG, 5203 Much Nut runner with torque limiting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951148A1 (en) * 1979-12-19 1981-07-09 Robert Bosch Gmbh, 7000 Stuttgart MEASURING DEVICE FOR A TURNING ANGLE AND / OR A TORQUE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29612693U1 (en) * 1996-07-23 1996-09-19 Wagner Paul Heinz Screwdriver

Also Published As

Publication number Publication date
DE3214889A1 (en) 1983-10-27
EP0092736A1 (en) 1983-11-02
US4485682A (en) 1984-12-04
DE3360511D1 (en) 1985-09-12
JPS58196977A (en) 1983-11-16
JPH0525638B2 (en) 1993-04-13

Similar Documents

Publication Publication Date Title
EP0092736B1 (en) Transmitter for torque and/or angle measurement, particularly on power driven screwing tools
EP0164574B1 (en) Screw driving device
DE2462678C3 (en) Housing construction for a power-operated tool, in particular screwdrivers
EP0581933B1 (en) Powered hand tool
DE3732811C2 (en)
DE19629585C2 (en) Angle measuring device
DE19908459C2 (en) torque sensor
EP0778239B1 (en) Rope length gauge with longitudinally-movable drum
DE19828513A1 (en) Electrically supported auxiliary force steering for motor vehicles improved to enable simple and cost-effective measurement of steering-specific parameters
EP0144803B1 (en) Non-contact measuring arrangement for torque and/or turning angle
DE10122053A1 (en) Motor e.g. for motor vehicle window, has rotation sensor element fixed to motor housing opposite sensor magnet for detecting motor speed
DE102013208433A1 (en) Power tool
DE2402824A1 (en) ANGLE WRENCH WITH INTEGRAL TORQUE TRANSFER
DE202006010155U1 (en) Connecting structure for electrical tool has toothed ring with annular body coaxial to threaded attachment hole with threaded first end extending into first main body opening, threaded second end extending out from main body
US4502549A (en) Spring-coupled power screwdriver
DE10147904B4 (en) torque sensor
EP0904178B1 (en) Hyraulic power wrench
CH666844A5 (en) Facing and turning head.
DE3714150C2 (en)
DE3809751A1 (en) FEEDING HEAD FOR AUTOMATIC MACHINE TOOLS
LU88568A1 (en) Electric drive unit for small electrical appliances
EP1600665B1 (en) Electromotive adjustable drive
DE102016205008B4 (en) milling head
DE202011003756U1 (en) Connecting arrangement for the coupling of two electrical connectors together
DE60008947T2 (en) Device for achieving a linear movement

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830413

AK Designated contracting states

Designated state(s): DE GB IT SE

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB IT SE

REF Corresponds to:

Ref document number: 3360511

Country of ref document: DE

Date of ref document: 19850912

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920316

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920406

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920629

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930413

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930414

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930413

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940101

EUG Se: european patent has lapsed

Ref document number: 83103552.2

Effective date: 19931110