EP0090187A2 - Dispositif de vissage - Google Patents

Dispositif de vissage Download PDF

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Publication number
EP0090187A2
EP0090187A2 EP83101975A EP83101975A EP0090187A2 EP 0090187 A2 EP0090187 A2 EP 0090187A2 EP 83101975 A EP83101975 A EP 83101975A EP 83101975 A EP83101975 A EP 83101975A EP 0090187 A2 EP0090187 A2 EP 0090187A2
Authority
EP
European Patent Office
Prior art keywords
output shaft
screwing device
drive shaft
segment
angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83101975A
Other languages
German (de)
English (en)
Other versions
EP0090187A3 (fr
Inventor
Friedrich Dipl.-Ing. Hornung
Wolfgang Ing. Grad. Jundt
Fritz Dipl.-Ing. Schädlich
Hans-Joachim Vogt
Steffen Ing. grad. Wünsch
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 EP0090187A2 publication Critical patent/EP0090187A2/fr
Publication of EP0090187A3 publication Critical patent/EP0090187A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/007—Attachments for drilling apparatus for screw or nut setting or loosening
    • 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 screw device according to the preamble of the main claim.
  • a screw device is already known with which screw connections can be produced.
  • the known screwing device has a torque measuring device and a clutch, by means of which the driving speed of the screwdriver is reduced shortly before tightening.
  • electrical or pneumatic drive devices are known which screw in the screw at a high speed in order to tighten the screw shortly before the final strength is reached at a slow speed.
  • the known screwing devices have the disadvantage that the speed is reduced shortly before completion of the screwing process by means of a gearbox or by changing the supply frequency in AC motors, since otherwise the screw connection is over-tightened is possible because the shutdown process takes a certain amount of time. Because of the switching devices required, the known screwing devices are expensive, and it also takes a relatively long time for the screwing process to be completed.
  • the screwing device according to the invention with the characterizing features of the main claim has the advantage that the screwing process can be carried out without changing the speed. A two-step tightening at high speeds and with reduced SPEED 'ahl can thus be avoided. This significantly reduces the effort required for gearboxes and clutches. Another advantage is that the weight of the screwdriver is reduced so that it is easier to handle.
  • the segment sleeve advantageously serves on one side as a segment ring for an encoder. This achieves a cost-saving construction of the screwing device that requires few parts. It is also favorable to arrange the sensors spatially adjacent, which leads to a particularly simple construction.
  • FIG. 1 shows an embodiment of a screwing device
  • FIG. 2 shows another embodiment with a screwing device with adjacently arranged sensors.
  • FIG. 1 shows a drive shaft 2 and an output shaft 3 in a housing 1.
  • a transmission (not shown) with a motor is connected to the drive shaft 2, which can be designed, for example, as an electric motor or compressed air motor.
  • the tool is attachable to the output shaft 3.
  • the drive shaft 2 and the output shaft 3 are connected to one another via a spring 4.
  • the spring 4 engages in a groove 5 of the output shaft 3 and in a groove 6 of the drive shaft 2.
  • the grooves 5 and 6 are chamfered in the direction of rotation so that the spring can be removed from the groove in the event of an overload.
  • the groove 5 is in the output shaft 3, the groove 6 are embedded in a thickening 23 of the drive shaft 2.
  • the spring 4 is surrounded by a segment sleeve 7 which is fastened to the output shaft 3.
  • a guide sleeve 8 is also provided between the spring 4 and the drive shaft 2 or the output shaft 3 in order to increase the stability of the screwing device and to prevent axial pressure on the spring 4.
  • the segment sleeve 7 is formed at its upper end 12 as a segment ring, the segment ring 12 having two or even multiple millings that are evenly distributed over the circumference.
  • the segment ring 12 rotates with the output shaft 3.
  • a coil body 9 with a coil 10, which surround the drive shaft 2 in a ring, is also fixedly attached to the housing.
  • Another segment ring 11 is fixedly connected to the drive shaft 2.
  • the segment ring 11 also has two or even multiple millings that are uniform over the circumference of the segment ring 11 are distributed.
  • the connections of the coil 10 are guided to a plug connection 13, to the connection of which a torque measuring device 14 can be connected.
  • the spring offers the possibility of obtaining a measurement signal for the torque in a simple manner. Since the angle of rotation of the spring 4 is proportional to the torque to be transmitted in each case, the torque can be easily determined if the angle of rotation is known. This is determined by the torque sensor.
  • the torque transmitter essentially consists of the coil 10 on the coil body 9, and the two segment rings 11 and 12, which are arranged coaxially with one another, the coil 10 being fixedly mounted on the housing and the two segment rings 11 and 12 being rotatable relative to one another.
  • the segment rings 11 and 12 are preferably made of aluminum.
  • the torque signal is generated by changes in the impedance of the coil. The impedance change of the coil takes place by rotating the two segment rings 11 and 12 relative to one another. This makes it possible to obtain a torque signal in a simple manner.
  • the output shaft 3 is preferably mounted in an annular groove bearing 15. If an angle measurement is desired, a further encoder is to be attached to the output shaft 3, which is essentially similar to the torque transmitter.
  • a coil 18, which surrounds the output shaft in a ring, is attached to a coil body 17 which is fixedly connected to the housing.
  • a segment ring 20 is firmly connected to the coil former.
  • the segment ring 20 has irei recesses that are evenly distributed over its circumference.
  • Another segment ring 19 is fixedly connected to the output shaft.
  • the segment ring 19 also has three recesses which are evenly distributed over the circumference.
  • Another bearing 16 causes the segment rings 19 and 20 to be securely supported relative to one another.
  • An angle signal can be tapped at a connection socket 21. This is evaluated in an evaluation circuit 22.
  • the signal size is also generated in the angular encoder by changes in the impedance of the coil 18.
  • the change in impedance again takes place by turning the segment rings 19 and 20, which are preferably designed as aluminum cylinders. Since the segment ring 20 is fixed, an angle-proportional signal results.
  • the angle encoder delivers. a triangular voltage, for example, as an electrical signal voltage, three periods occurring during one revolution of the output shaft 3.
  • the torque measurement can also take place in that both encoders are designed as protractors. This means, for example, that the segment ring 11 is firmly connected to the coil former 9. The difference between the output signals of the two angle sensors is then to be regarded as the torque. Although this arrangement brings certain mechanical simplifications, the evaluation is more difficult because the measuring inaccuracies increase with increasing angle.
  • the spring 4 which is designed for the maximum torque to be transmitted with regard to its angle of rotation, has the task of temporally stretching the screwing process, particularly in the case of "hard” screwing cases. Hard screwdriving are given, for example, when two metallic unyielding bodies are joined together.
  • the spring action turns every "hard” screwing case into a “soft” screwing case, so that there is sufficient time for the engine to be switched off. As soon as a predetermined rotation and thus a certain torque is reached, the motor on the drive shaft 2 is switched off. Since this deactivation does not take place immediately due to the inertia of the moving masses and the switching delays, the delay is absorbed by a further rotation of the spring 4.
  • the signal of the angle encoder with the coil 18 is mainly used for checking in order to identify faulty screws which, for example, have already reached the yield point when the prescribed torque is reached.
  • FIG. 1 A further screwing device is shown in FIG.
  • the drive shaft, to which a motor (not shown) is connected, is again identified by 2.
  • One end of the spring 4 is in turn mounted in a groove of the drive shaft 2.
  • the other end of the spring 4 is mounted in the groove 5 of the thickening 23.
  • the thickening 23 is the thickening of the output shaft 3.
  • a guide sleeve is not provided, but the drive shaft 3 is formed at the end as a blind hole into which the pin of the drive shaft 2 projects.
  • the segment sleeve 7 is now non-positively connected to the drive shaft 2.
  • the coil 33 on the one hand and the coil 44, on the other hand, which enclose the output shaft 3, are applied.
  • the segment rings 30 and 31 belong to the coil 33.
  • the segment ring 31 is the upper end of the segment sleeve T, which in turn has two or even multiple recesses on its circumference.
  • the segment sleeve 30 is in turn connected to the output shaft 3.
  • Two connecting wires lead from the part of the coil holder 34 designed as a coil former 32 to a connection 42, where a signal proportional to the torque is output to the torque measuring device 14.
  • part of the coil holder 34 is designed as a coil former 43, on which a coil 44 is arranged axially to the output shaft 3.
  • the connections of the coils 44 in turn lead to the connection 42.
  • the coil 44 is assigned the segment rings 38 and 37, the segment ring 37 being firmly connected to the coil holder 34.
  • the segment ring 38 is rotatable and connected to the output shaft 3.
  • the entire encoder arrangement is supported on bearings 35 and 36.
  • the segmented ring 38 which is designed to be movable and fastened to the output shaft 3, is pressed against the transmitter system by means of a plate spring 39.
  • An annular groove bearing 40 guided in a sleeve 41, serves to mount the output shaft 3.
  • the housing is closed off on the output side by a threaded ring 45.
  • the exemplary embodiment shown in FIG. 2 fulfills the same function as the exemplary embodiment according to FIG. 1.
  • Changes in impedance of the coil 33, its segment ring 31 by the drive shaft 2 and its segment ring 30 is moved by the output shaft 3 serve to indicate the torque.
  • the coil 44 and the segment rings 37 and 38. the angle can be measured by changing the impedance.
  • the assembly of this device is simple since the sensors are arranged on a common holder 34 and can therefore be used together. With this arrangement, the connections can be led out at one point of the housing. It is also possible to preassemble the entire transmitter device before installing it in the housing 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP83101975A 1982-03-25 1983-03-01 Dispositif de vissage Withdrawn EP0090187A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823210889 DE3210889A1 (de) 1982-03-25 1982-03-25 Schraubvorrichtung
DE3210889 1982-03-25

Publications (2)

Publication Number Publication Date
EP0090187A2 true EP0090187A2 (fr) 1983-10-05
EP0090187A3 EP0090187A3 (fr) 1986-01-29

Family

ID=6159208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101975A Withdrawn EP0090187A3 (fr) 1982-03-25 1983-03-01 Dispositif de vissage

Country Status (4)

Country Link
US (1) US4502549A (fr)
EP (1) EP0090187A3 (fr)
JP (1) JPS58171270A (fr)
DE (1) DE3210889A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0724934A1 (fr) * 1995-01-31 1996-08-07 Hitachi Koki Co., Ltd. Tournevis motorisé et mécanisme d'embrayage utilisé dans celui-ci

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3742952A1 (de) * 1987-12-18 1989-07-06 Fein C & E Maschine mit variabler drehmomenteinstellung
JPH0295579A (ja) * 1988-09-28 1990-04-06 Maruma Jusharyo Kk 高トルク油圧シューボルトレンチ
JPH0798311B2 (ja) * 1988-10-12 1995-10-25 富士写真フイルム株式会社 ねじ締め装置
DE10303235B4 (de) * 2002-01-29 2011-03-31 Makita Corp., Anjo Drehmomentübertragungsmechanismen und Motorwerkzeuge mit solchen Drehmomentübertragungsmechanismen
US7210541B2 (en) * 2002-09-03 2007-05-01 Microtorq Llc Transducerized rotary tool
US7090030B2 (en) * 2002-09-03 2006-08-15 Microtorq L.L.C. Tranducerized torque wrench
US7395871B2 (en) * 2003-04-24 2008-07-08 Black & Decker Inc. Method for detecting a bit jam condition using a freely rotatable inertial mass
USD534777S1 (en) 2003-09-03 2007-01-09 Microtorq Llc Rotary mechanized tool
DE602004007235T2 (de) * 2004-03-22 2007-10-11 Cooper Power Tools Gmbh & Co. Übertragung von Energie und Daten von einer Spannungsquelle zu mehreren elektrisch angetriebenen Werkzeugen in einer Multiwerkzeugstation
DE602004018264D1 (de) * 2004-03-22 2009-01-22 Cooper Power Tools Gmbh & Co Intelligente Spindel zum Festziehen mit integriertem Messwertaufnehmer, Servoverstärker und Datenverarbeitungsanlage
US20070144753A1 (en) * 2005-12-22 2007-06-28 Microtorq, L.L.C. Transducerized rotary tool
US7362066B2 (en) * 2006-05-19 2008-04-22 Jervis B. Webb Company Overload protection system
US7828077B1 (en) * 2008-05-27 2010-11-09 Jergens, Inc. Rotary angle tool
WO2010017371A1 (fr) * 2008-08-06 2010-02-11 Milwaukee Electric Tool Corporation Outil de couple précis
WO2012061176A2 (fr) 2010-11-04 2012-05-10 Milwaukee Electric Tool Corporation Outil à chocs avec embrayage réglable

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Publication number Priority date Publication date Assignee Title
US1111848A (en) * 1914-09-29 Frank W Smith Means for electrically determining transmitted power.
US1946100A (en) * 1929-03-05 1934-02-06 Bendix Cowdrey Brake Tester In Electrical dynamometer
US2228032A (en) * 1937-05-10 1941-01-07 Standard Oil Co Interval ratio indicator
US2260036A (en) * 1940-08-24 1941-10-21 Gen Electric Transmission dynamometer
DE2200035C3 (de) * 1971-01-06 1984-09-27 Rockwell International Corp., Pittsburgh, Pa. Werkzeug zum Festziehen von Befestigungselementen, beispielsweise Schrauben
US3982419A (en) * 1972-05-09 1976-09-28 Standard Pressed Steel Co. Apparatus for and method of determining rotational and linear stiffness
US3839662A (en) * 1973-05-08 1974-10-01 Telemecanique Electrique Motorized valve control
US3970151A (en) * 1975-07-03 1976-07-20 Gardner-Denver Company Torque responsive motor shutoff for power tool
DE2637954C3 (de) * 1976-08-24 1979-07-26 Georg Robel Gmbh & Co, 8000 Muenchen Schraubmaschine für Schienenbefestigungsschrauben
DE2731090C2 (de) * 1977-07-09 1983-09-15 Nagel, Peter, 7442 Neuffen Drehmoment-Schrauber
SU694778A1 (ru) * 1978-05-26 1979-10-30 Предприятие П/Я М-5671 Измеритель крут щего момента
JPS5544136A (en) * 1978-09-20 1980-03-28 Yutani Tekko Kk Torsion bar
US4328871A (en) * 1980-01-28 1982-05-11 Sps Technologies, Inc. Power tool speed and torque control mechanism
JPS57121477A (en) * 1981-01-16 1982-07-28 Matsushita Electric Industrial Co Ltd Fixed torque screw clamping device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0724934A1 (fr) * 1995-01-31 1996-08-07 Hitachi Koki Co., Ltd. Tournevis motorisé et mécanisme d'embrayage utilisé dans celui-ci

Also Published As

Publication number Publication date
DE3210889A1 (de) 1983-09-29
EP0090187A3 (fr) 1986-01-29
JPS58171270A (ja) 1983-10-07
US4502549A (en) 1985-03-05

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

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Effective date: 19830301

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Effective date: 19860730

RIN1 Information on inventor provided before grant (corrected)

Inventor name: VOGT, HANS-JOACHIM

Inventor name: JUNDT, WOLFGANG, ING. GRAD.

Inventor name: HORNUNG, FRIEDRICH, DIPL.-ING.

Inventor name: SCHAEDLICH, FRITZ, DIPL.-ING.

Inventor name: WUENSCH, STEFFEN, ING. GRAD.